Sealing
电磁阀相关英文术语
电磁阀相关英文术语一、零部件术语Axes Guide 轴套Ball 球、球芯Ball seat 密封圈Blowdown Sealing Face 启、阀件密封面Body 阀体Bonnet 阀盖Disc 阀瓣Mut 螺母Screw 螺栓Sealing 密封件Spring 弹簧Stem 阀杆Stem Mut 阀杆螺母Stem seal 填料Wedge Disc 闸板二、性能术语Applicable media 适用介质Applicable tempure 适用温度Butt Clamp 对夹Chemical anaiysis 化学成份Connecting format 连接形式Double disc 双闸板Flexible disc 弹性闸板Flange 法兰Hoop 卡箍Inside theread 内螺纹Material chemical analysis and mechanical capacity 材料化学成份和机械性能materials 材料Materials for main parts 主要零件材料Mechanical capacity 机械性能Max. Discharging Capacity 最大排水量Max. Operating Temperature 最高工作温度Max. Allowable Temperature 最高允许温度Max. Allowable Pressure 最高允许压力Model 型号Name of parts 零件名称Nominal Pressure 公称压力Outside theread 外螺纹Oxidant 氧化性介质Parallet 平行Reductant 还原性介质Rising stem 明杆Seat testing pressure 压力气密封试验压力Socket 卡套Specifications 性能规范Single disc 单闸板Solid 刚性Strengh testing pressure 强度试验压力Steam , condensate 蒸汽 , 凝结水Water,oil,steam 水 , 温度 , 气Wedge 楔式Welding 焊接三、材料术语Buna-N rubber 丁晴橡胶Casting aluminium brass 铸铝黄铜Casting aluminium bronze 铸铝青铜CHR rubber 氯晴橡胶Chrominm-molybdenum-vanadium steel 铬钼钒钢Chromium stainless steel 铬不锈钢Chromium-molybdenum steel 铬钼钢Corrugation pad 波形垫Cuprum alloy 铜合金Ductile Cast iron 球墨铸铁Expanded graphite 柔性石墨Fine Steel Casting iron 优质碳素钢Fluorous rubber 氟橡胶Gray Cast iron 灰铸铁Hayne's alloy 钴铬钨合金High tem perature steel 高温钢Low tem perature steel 低温钢Nylon 尼龙塑料Polytetrafluoroethylene 聚四氟乙烯Pure aluminum 纯铝Pure cupper 纯铜Rubbeer graphite board 橡胶石墨板Spring steel 弹簧钢Stainless acid-resisting steel 不锈耐酸钢Stainless and Graphite 不锈钢 / 石墨Stainless steel 不锈钢Steel Casting iron 碳素钢铸件Shell Test Pressure 壳体试验压力Service Fluid 工作介质四、阀门术语Angle Stop Valves 角式截止阀Angle Throttle Valves 角式节流阀Angle Type Globe Valves 角式截止阀Butterfly Type Non-slam Check 蝶式缓冲止回阀Butterfly Valves with Gear Actuator 蜗轮传动蝶阀Cock 二通CQ Thread Ball Valves CQ 螺纹球阀Diaphragm Valves 隔膜阀Double Disc Flat Gate Valves 双闸板平板闸阀Double Disk Parallel Gate Valves 明杆平行式双闸板闸板Double Opening Exhaust Valves 双口排气球Electric Actuated Stop Valves 电动截止阀Electric Actuated Wedge Gate Valves 电动楔式闸阀Electric Double Disk Parallel Gate Valves 电动平行式双闸板闸板Emergeny Cut-off Valves 紧急切断阀Free Float Type Steam Trap 浮球式疏水阀Flange Ball Valves 法兰球阀Flange Gate Valves 法兰闸阀Flange Globe Valves 法兰截止阀Gauge Valves 仪表阀Hard Seal Butterfly Valves 金属密封碟阀High Temperature Pressure Power Station Gate Valves 高温高压电站闸阀High Temperature Pressure Power Station Globe Valves 高温高压电站截止阀Lift Check Valves 升降式止回阀Lift Check Valves 升降式止回阀Lining Ball Valves 衬里球阀Lining Butterfly Valves 衬里碟阀Lining Check Valves 衬里止回阀Lining Cock 衬里二通Lining Globe Valves 衬里截止阀Lining T-Cock Valves 衬里三通旋塞阀Liquid Indicator 液位计LPG Pipe Fitting 液化气管件Magnetic Co-operate Globe Valves 磁耦合截止阀Magnetism Forle Pumps 磁力泵Manual Oil Pumps Valves 手摇油泵 ( 阀 )Meter Needle Type Globe Valves 仪表针形截止阀Oblique Stop Valves 直流式截止阀Parallesl Slide Valves 浆液阀Piping Centrifugal Pumps 管道离心泵Piping Pumps 管道泵Piping Safety Valves 管道安全阀Plunger Globe Valves 柱塞截止阀Quick Draining Valves 快速排污阀Restrictor Valves 过流阀 ( 或节流阀 )Safety Valves 安全阀Screw Pumps 螺杆泵Scum Gate Valves 排渣闸阀Single Disc Flat Gate Valves 单闸板平板闸阀Single Opening Exhaust Valves 单口排气球Slurry Pumps 泥浆泵Stop Valves 截止阀Strainer 过滤器Submerged Motor Pumps 潜水电泵 ( 排污泵 )Swing Check Valves 旋启式止回阀Swing Check Valves 旋启式止回阀Tank Lorry Ball Valves 槽车球阀T-Cock 三通Thin Gate Valves 薄型闸阀Throttle Valves 节流阀Tiny Drag Slow Shut Check Valves 微阻缓闭止回阀Under Water Pumps 液下泵Vacuum Pumps 水力喷射器 ( 真空泵 )Vertical Lift Check Valves 立式止回阀Wafer Check Valves 对夹式止回阀Wafer Type Butterfly Valves with Rubber Itning 对夹式衬胶蝶阀Waste Valves 排污箱 ( 阀 )Water Seal Gate Valves 水封闸阀Wedge Gate Valves 楔式闸阀Y Type and Cylinder Filters Y 型筒型过滤器。
密封行业专业术语 中英文对照
Y-ring standards
温州市机械密封件厂
Wenzhou machinery seal factory
v型密封圈标准
V-ring standards
液压支架密封件
Hydraulic support seal
石墨密封圈
Graphite seal ring
陶瓷机械密封件
Ceramic machinery seal
Bearing seal
进口o型密封圈
Imported O-ring
气动执行器密封件
Pneumatic actuators seals
橡胶密封圈规格
Rubber seal specification
密封件型号
Seal modle
c型密封圈
C-ring seal
密封件分类
Seals classification
Water pump machinery seal
气缸密封圈
Cylinder seal
景县密封件
硅橡胶密封圈
Silicone rubber seal
机械密封件厂
Machinery seal factory
耐高温o型密封圈
High temperature resistance O-ring
其他密封件
Related seal
o型密封圈规格
O-ring dimension
进口密封件
Impotred seal
v型密封圈
V-ring
泵用机械密封件
Pump machinery seal
进口密封圈
Imported seal
中国密封件网
China Sealing Net
密封试验标准
密封试验标准
密封试验标准(Sealing Test Standard)是为了检测和评估产品
或设备的密封性能而制定的一系列规范和要求。
密封试验标准通常涉及以下方面内容:
1.试验方法:包括试验设备的选取、试验样品的准备以及试验
过程的操作方法和要求。
2.试验参数:对试验过程中的各项参数进行规定,如试验温度、压力、时间等。
3.试验条件:规定试验应该在什么样的环境条件下进行,如干
燥环境、湿度环境、低温环境等。
4.试验结果评估:规定如何评估试验结果,判断产品或设备的
密封性能是否符合要求。
5.试验记录和报告:规定试验过程中应该如何记录试验数据,
并生成相应的试验报告。
密封试验标准的制定旨在确保产品或设备在正常使用情况下能够有效地防止液体、气体或固体物质的泄漏或渗透,以满足用户的需求和要求。
不同的产品或设备可能有不同的密封试验标准,根据具体的产品特性和使用环境来确定适用的标准。
密封件行业英语资料
密封件行业英语资料密封件是一种在工业生产中广泛使用的材料,它具有防封闭空间内物质外泄的功能。
密封件通常由橡胶、塑胶、纸制品等材料制成,有多种形状和尺寸可供选择。
它在汽车、航空航天、化工、电子等领域起着关键作用,因此学习与密封件相关的英语资料对于从事相关行业的人士来说是非常重要的。
首先,我们来了解一些与密封件有关的基础英语术语。
密封件在英文中通常称为seal,指的是一种将两个或多个物体连接在一起,并阻止物质外泄的装置。
同样地,密封件的英文也可以用sealing gasket来表示。
另外,密封件通常可以分为静密封件(static seal)和动密封件(dynamic seal)。
静密封件适用于不需要频繁运动的场合,如管道的接口、容器的盖子等;而动密封件则适用于需要频繁运动的场合,如活塞密封、轴封等。
在生产密封件时,往往需要进行一系列的测试,以确保其质量符合要求。
这些测试可以包括密封性能测试(sealing performance test),压缩变形测试(compression deformation test),耐温测试(temperature resistance test)等。
通过这些测试,生产商可以评估密封件的性能,并进行必要的改进。
此外,还有一些特殊的测试技术,如硬度测试(hardness test),拉伸强度测试(tensile strength test),以及化学成分分析(chemical composition analysis),可以提供更详细的信息,保证密封件的质量。
在密封件行业,产品的设计和制造是非常重要的环节。
在英语中,产品设计可以用product design来表示,制造过程可以用manufacturing process来表示。
当涉及到设计方面时,需要考虑到密封件的尺寸、形状、材料等因素。
这些因素对于密封件的性能和使用寿命起着至关重要的作用。
在制造过程中,我们会用到一些关键的工艺,比如模具制造(mold manufacturing),注塑成型(injection molding),压缩模压成型(compression molding)等。
汽车术语英语
1 1.1 术语 TERMS 密封件 SEALING 前门和后门密封件 FRONT DOOR&REAR DOOR SEALING 前门开关护罩 FRONT DOOR SWITCH WATERSHIELD 前门挡水膜片 FRONT DOOR WATERDAM 后门挡水膜片 REAR DOOR WATERDAM 前门密封条 FRONT DOOR WEATHERSTRIP 后门密封条 REAR DOOR WEATHERSTRIP 前门腰线内密封条 FRONT DOOR INNER BELT WEATHERSTRIP 前门腰线外密封条 FRONT DOOR OUTER BELT WEATHERSTRIP 后门腰线内密封条 REAR DOOR INNER BELT WEATHERSTRIP 后门腰线外密封条 REAR DOOR OUTER BELT WEATHERSTRIP 前门玻璃滑道密封条 FRONT DOOR GLASS CHANNEL WEATHERSTRIP 后门玻璃滑道密封条 REAR DOOR GLASS CHANNEL WEATHERSTRIP 门到边梁密封条 DOOR TO ROCKER SEAL 侧围玻璃密封条 QUARTER WINDOW SEAL 发动机罩(盖)和举升门密封件 HOOD&LIFTGATE SEALING 举升门门板铰链密封垫 LIFTGATE GATE HINGE HAFT GASKET 举升门车身铰链密封垫 LIFTGATE BODY HINGE HAFT GASKET 举升门开口密封条 LIFTGATE OPENING WEATHERSTRIP 举升门玻璃密封条 LIFTGATE GLASS SEAL 机罩(盖)铰链与车身间密封条 HINGE TO BODY SEAL HOOD 机罩(盖)与前围间密封条 HOOD TO COWL SEAL 举升门铰链密封垫 LIFTGATE HINGE SEAL 车身堵塞 BODY PLUGS 密封型堵塞 SEALING TYPE PLUG 车门导线孔塞 DOOR WERING CONDULT HOLE PLUG 隔离件 INSULATION 机罩(盖)隔热垫 HOOD INSULATION 机罩(盖)隔热垫紧固件 HOOD INSULATION FASTENER 侧围内饰板隔音垫 QUARTER TRIM PANEL INSULATION 前围隔热垫 COWL INSULATION 轮罩隔热垫 WHEELHOUSE INSULATION 内饰板 TRIM PANEL 车门内饰板 DOOR TRIM PANEL 前门内饰板 FRONT DOOR TRIM PANEL 后门内饰板 REAR DOOR TRIM PANEL 门内饰板基板 DOOR TRIM FOUDATION 门内饰班底板 DOOR TRIM SUBFOUDATION 门内饰板衬垫 DOOR TRIM PAD 门内饰板地毯 DOOR TRIM CARPET 门内饰板装饰条 DOOR TRIM MOLDING 门内饰板接片 DOOR TRIM PANEL EXTENSION 泡沫垫片 FOAM SPACER 扬声器蓖板框板 SPEAKER GRILLE BEZEL 术语 TERMS 扬声器面板 SPEAKER GRILLE SCREEN
密封条常用产品英文
window slot seal,outer外水切(外压条)window slot seal,inner内水切(内压条)door seal outer ,real door后门门外条door seal outer ,front door前门门外条door seal inner,real door后门门洞条door seal inner,front door前门门洞条assy window guide,door rear后门玻璃导槽密封条assy window guide,door front前门玻璃导槽密封条side window glass ass三角窗总成密封条sealing trunk lid行李箱密封条seal bulkhead 水箱密封条sealing body 头道密封条涂装术语—涂膜缺陷99条油缩孔oil dewetting/cratering 雨水痕迹water slaining 气泡bubble/bubbling电泳气泡bubble trace on ED film 电泳湿漆膜剥落peeling off wet ED film 电泳缩孔ED cratering电泳针孔pinhole on ED film 丝状锈蚀filiform corrosion掉色discoloration色差off color色不均mottling色分离flooding湿污染wet contamination水痕迹water marke啄伤pecking变黄yellowing气体裂纹gas checking/crazing白化blushing颜料沉降pigment sedimentation 气泡bubble陷穴点蚀createring/pitting银粉不匀poor aluminum crientation/mottling发糊dulling/bloom/clouding/cloudiness/hazing尘埃dust/dirt锈rust/corrosion打磨器纹sanding scratch涂密封胶不良sealing failure 底层染污bleeding沾污stain/spot/spotting起皱crinkling/shrielling/ wrinkling/rielling吸收suction/absorption水泡water bubbling盖底不良hiding failure 划伤scrack鲜映性低low distinctness of image层间剥离intercoat adhesion failure 退色fading 流痕dripping下沉sagging run curtaining流挂sag皱纹起皱wrinkle碎落chipping粉化chalking泳透性差thin/no ED coating失光dulling/loss of gloss/matting光泽不匀flashing 打磨划伤sand scratch涂膜过厚too mach film thickness涂膜剥落peeling干污染dry contamination涂料缩孔、鱼眼cratering/fish eye涂料颗粒dirt/seed流淌sagging/running 渗色bleeding涂得太薄thin paint漏涂skips剥离peeling缩孔鱼眼crawing/fish eye/cratering钣金凹凸ding and dent焊药针孔soldering pinhole 针孔pinhole膨泡blistering颗粒hunp/cluster发白blushing起泡blistering触伤痕mar鬓状裂纹hair cracking 砂纸纹sanding scratch凹坑cratering变色discoloration膨润swelling模糊(阴影)shading 星状不平comet star pineple 保护不良break line failure 金属颗粒metallic seeding返粘after tack未烘干透under baking锉刀纹grinding scratch桔皮orange peel气泡孔solent popping/pin holes裂纹/开裂cracking、发状裂纹hair cracking、浅裂纹checking、龟裂craging、裂开cracking、鳄鱼皮状裂纹alligatering crocodiling物理发泡physical foam化学发泡chemical foam吹塑blow molding多层吹塑multi-layer blow molding拉伸吹塑成型stretch blow molding滚塑rotational moulding反应注射成型reaction injection molding, RIM 真空成型vacuum forming无压成型zero ressure molding真空烧结vacuum sintering真空袋成型vacuum bag molding热成型thermal forming拉伸热成型stretch thermoforming袋模塑bag molding糊塑paste molding镶铸imbedding冲压成型impact molding触压成型impression molding层压材料laminate泡沫塑料成型foam molding包模成型drape molding充气吹胀inflation橡胶胶乳rubber latex胶乳latex高分子胶体polymer colloid生橡胶raw rubber,crude rubber 硬质胶ebonite再生胶reclaimed rubber充油橡胶oil-extended rubber母胶masterbatch交联crosslinking固化cure光固化photo-cure硫化vulcanization后硫化post cure,post vulcanization自硫[化] bin cure自交联self crosslinking , self curing过硫over cure返硫reversion欠硫under cure动态硫化dynamic vulcanization不均匀硫化heterogeneous vulcanization 开始[硫化]效应set-up effect自动硫化self-curing, self-vulcanizing焦烧scorching无压硫化non-pressure cure 模压硫化moulding curing 常温硫化auto-vulcanization。
密封装置的种类及作用
两密封面在工作时有相对运动的密封为动密封。通常是一个静止,一个运动,既 要保证密封可靠,又要防止相对运动元件间的摩擦、磨损,损坏密封件,保证密封件有一定 的寿命。按照相对运动的类型不同分为移动式动密封和旋转式动密封。移动式动密封主要用 在直线运动或往复运动的机械中,如液压千斤顶、液压升降台等液压机械和发动机的汽缸和 活塞之间的密封等,本章主要讨论旋转式动密封。
1、垫片密封
1
1, the gasket seal
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垫片密封是静密封中最常用的一种形式。在两连接件的密封面之间垫上不同材质的 密封垫片,然后拧紧螺纹或螺栓,使垫片产生弹性和塑性变形,填塞密封面的不平处,达到 密封的目的。
The sealing gasket seal is still the most commonly used one kind of form. In two different fittings between the sealing surface of mat material of sealing gaskets, then tighten the screw or bolt, the gasket produce elastic and plastic deformation, filling sealing surface unevenness, achieve the purpose of sealing
2
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压紧状态
缸盖 pressure to ensure that the seal. In actual use, often sealing surface coated sealant,
机械密封常用英语汇总
机械密封行业常用英语汇总1. sealing ring --密封环2. seal face--密封端面3. seal interface--密封界面4. rotating ring--动环/旋转环5. stationary ring--静环/静止环6. compensated ring--补偿环7. un-compensated ring--非补偿环8. seal head--补偿环组件9. primary seal--主密封10. secondary seal--副密封11. auxiliary seal--辅助密封12. auxiliary seal ring--辅助密封圈13. bellows--波纹管14. pushing out ring--撑环15. back-up ring--挡圈16. compensated ring adaptor--补偿环座17. un-compensated ring adaptor--非补偿环座18. spring adaptor--弹簧座19. seal adaptor--波纹管座20. retainer--传动座21. driving screw--传动螺钉22. set screw--紧定螺钉23. snap ring--卡环24. clamp ring--夹紧环25. anti-rotating pin--防转销26. annular seal space--密封腔27. seal chamber--密封腔体28. end cover--密封端盖29. elastic component--弹性元件30. a pair of friction components--摩擦副31. inner circulation--内循环32. outer circulation--外循环33, self circulation--自循环34. flush--冲洗35. flush fluid--冲洗流体36. quench--阻封37. quench fluid--阻封流体38 . buffer fluid--隔离流体39 . temperature adjustable fluid--调温流体40. coolant--冷却流体41. heating fluid--加热流体42. sealed medium--被密封介质43. sealant--密封流体44. pv --pv值(密封流体压力P与密封端面平均滑动速度V的乘积)45 . limiting pv --密封达到失效时的PV值.它表示密封的水平46. working pv --极限PV值除以安全系数47. PcV--端面比压Pc与密封端面平均滑动速度V的乘积48. limiting PcV --密封达到失效时的PcV值.它表示密封材料的工作能力49. working PcV --许用PcV值.极限PcV值除以安全系数50 .leakage rate-- 泄漏量51 .run out--跳动52. wear rate--磨损率53. operating life--工作寿命54. operating period--使用期55 .abortive failure--早期失效56. Operating limits:工作参数57. Speed/velocity:转速58. Combination of material:材料组合59. Halted ring:弹簧挡圈60. Bellows:波纹管61. Retainer:传动套,传动座62. Drive ring:压圈63. Cup gasket:静环套64. Spring retainer:弹簧座65. O-ring: O形圈66. Tension spring:拉簧67. Stationary seat:静环形式/静环基座68. Rotary seat:动环座69. Drive screw:传动螺钉70. Wave spring/Bellow spring:波形弹簧71. Rotary o-ring:动环O形圈72. Stationary o-ring:静环O形圈73. Collar:定位套74. Snap ring/clamp ring:卡环75. Disc/thrust ring:止推环76. Wedge ring:楔形环77. Mating ring:静止环/静环78. Primary ring:动止环/动环79. Inventory:存货80. Agitator:搅拌器81. Cryogenics:低温学82. Mixer:搅拌机83. Refinery:炼油84. Petrochemical:石化85. Pulp:纸浆86. Paramecia:配药87. Desalination:脱盐88. Wastewater:污水89. Impeller:叶轮90. Fit:安装91. Lead:石墨,铅92. Edge:边缘93. Grade:等级94. Secondary sealing element:辅助密封材质95. Hydrostatic:流体静力学的96. Cross-section:横截面97. Material code:材料代码98. Seal size:密封轴径尺寸99. Assembly number:装配代码100. Sulphuric:硫酸101. Nitric acid:销酸102. Phosphoric acid:磷酸103. Hydrochloric:盐酸104. PV—pressure/velocity:压力与转速105. RS—rotating seat:动环座106. Multiplier:增效器107. TC—tungsten carbide:硬质合金108. Pin:销109. Engage:接合,啮合110. Pro剖面/侧面111. Adapter:适配器。
泵密封seal的基础知识
内部教学用-社外密
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5. 比热(Specific Heat)
Ⅲ. 机械密封基本理论
1. 基础 2. 基本理论
1) 流体膜(Fluid Film) 2) 研磨(Lapping) 3. 机械密封种类
1) 平衡密封 & 不平衡密封 (Balance Seal & Un-Balance Seal)
密封(SEAL)基础
2) 单密封(Single Seal) & 双密封(Dual Seal) A. 单密封(Single Seal) B. 双密封(Dual Seal)
密封(Seal)基础
密封(SEAL)基础
学习目的
1. 可说明密封种类、特点和使用方法 2. 可说明与机械密封(Mechanical Seal)相关流体的基本特性 3. 通过学习机械密封基础理论,可按种类特性、选定条件、运行条件来区分适用 4. 可区分说明干气密封(Dry Gas Seal)的原理、优缺点、系统(System) 5. 可掌握说明API 682的基本概念 6. 了解现场故障(Trouble)事例,事前预防故障发生
• 定义:流体在某种特定温度下液体和气态达到一定平衡时形成的压力,即达到平衡后不产生状态变化 的点,指液体不再气化,气体不再液化的临界点。 气化气体所受压力在特定温度下与液体达到平衡。
• 如左图所示: 密闭的容器中装有液体,在特定温度下容器上部压力恒定。
例如:在150℉下丁烷(Butane)的蒸气压为100 psia。
缓冲液(Buffer Fluid) 双重密封之间以润滑目的注入的流体:流体压力总是在大气压状态。
内部教学用-社外密
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3. 粘度(Viscosity)
密封(SEAL)基础
石化英语词汇
首页 > 收藏 > 翻译词汇 > 正文石油词汇英语翻译(S)更新日期:2005-7-21 出处: 作者:seal ability 密封能力seal assembly 密封组件seal boot 封闭套seal bore extension 密封筒加长短节seal bore 密封孔seal coat 封层seal construction rope 带芯股钢索seal curtain 油罐浮顶密封圈装置seal disc 密封盘seal element 密封元件seal extension 密封加长短节seal flange 密封法兰seal friction 密封摩擦seal hanger 密封悬架seal in 封入seal joint 密封接头Seal Law Convention 海洋法公约seal leakage 密封泄漏seal load 密封载荷seal nipple 密封接头seal off 封堵seal pad 密封板seal pipe 主气管线中的水封阀seal protector ring 密封防护垫环seal receptacle 密封座seal ring 密封环seal rock 密封岩seal section 密封段seal stack 一组密封seal steam 汽封蒸汽seal sub 密封接头seal valve 密封阀seal weld 密封焊道seal welding 密封焊接seal封sealab experiment 海洋实验室试验sealab 海洋试验室sealable tank 密封罐sealant 密封剂Seale 西鲁结构sealed against 封住sealed bearing rock bit 密封轴承牙轮钻头sealed bearings 密封轴承sealed bid 密封投标sealed chamber 密封筒sealed coring 密闭取心sealed fault 闭合断层sealed fracture 闭合裂缝sealed journal bearing 密封滑动轴承sealed package 密封包装sealed proposal 密封投标sealed relay 密封式继电器sealed reservoir 封闭储集层sealed tube 密封管sealed 封闭的sealer 密封器;密封垫;保护层;检验员sealift 海上接运sealing ability 密封能力sealing adaptor 密封接头sealing bearing 密封轴承sealing bellows 密封用波纹管sealing bore 密封筒sealing bush 密封衬套sealing characteristics 封堵性能sealing compound 密封膏sealing core drill 密闭取心sealing element 密封元件;封闭胶心sealing fault 封闭断层sealing field zone 封闭油田区sealing film 密封薄膜sealing fluid 密封液sealing gland 密封压盖sealing liquid 密封液sealing mechanism 密封机构sealing oil system 封油系统sealing pad 密封盘sealing process 封闭作用sealing property 密封性能sealing regenerative-type air preheater 密封回热式空气预热器sealing ring 密封环sealing run 封底焊道sealing signal 密封信号sealing socket 密封座sealing surface 密封面sealing wax 封蜡sealing 密封sealing-in 焊接sealing-off 脱焊sealing-on 焊上sealing-wax flow 封蜡流sealing-wax structure 封蜡构造seam welder 缝焊机seam welding 缝焊接seam 缝seaman 海员seamanship 航海术seamark 航海标志seamarsh 滨海沼泽seamen seaman的复数seamer 缝纫机;封口机;缝纫工seaming 用弯边法使两个板料连接;接缝seamless casing 无缝套管seamless steel tube 无缝钢管seamless tube 无缝管seamless 无缝的seamount chain 海山链seamount range 海底山脉seapeak 海底峰seaplane 水上飞机seaport 海港seaquake 海震sear 干枯的search after 找寻search angle 搜索角search coil 探查线圈search direction vector 搜索方向向量search for oil 勘查石油search interval 探索区间search lamp 探照灯search length 搜索长度search out 查出search procedure 搜索法search 勘查;研究searcher 搜索器searching unit 探头searching 搜索;严密的searchlight unit 消防照明车searchlight 探照灯Searle viscometer 塞尔粘度计Searlesite 水硅硼钠石seasat 海洋卫星seascan marine radar 船上无线电定位站seashore 海滨seasickness 晕船seaside 海滨season cracking 老化开裂season wind 季风season 季seasonal adjustment 季节性调整seasonal cycle 季节周期seasonal demand 季节性需求seasonal grades 季节级别seasonal growth 季节生长seasonal lake 季节湖seasonal load line 季节载重线seasonal move 季节变动seasonal ratio 季节性比率seasonal relation 季节关系seasonal stream 季节性河流seasonal variation 季节性变动seasonal wind 季节风seasonal zone 季节带seasonal 季节性;周期性seasoned timber 干木材seasoning 风干;老化seastrand 海岸seat belt 座位安全带seat earth 根土岩seat pocket 坐槽seat reamer 阀座修整铰刀seat retainer 座圈;阀座护圈seat ring 阀座圈seat rock 根土岩seat shear pin 球座剪切销seat stone 根土岩seat valve 座阀seat wrench 阀座松紧扳手seat 座Seatask unit 海洋作业设备seater 座式seating cup body 密封皮碗套seating cup 密封皮碗seating nipple 座节seating position 坐落位置seating shoe 底座seating 座seawall 防波堤seaward 向海的seawater deaeration 海水脱氧seawater encroachment 海水入侵seawater filter 海水滤器seawater flood project 海水驱方案seawater injection 注海水seawater intrusion 海水入侵seawater lift pump 海水提升泵seawater treatment plant 海水处理站seaway force 浪力seaway 海道seaweed theory 海藻成油说seaweed 海藻seaworthiness 适于航海seaworthy ship 适航性好的船舶seaworthy 能航海的sebacate 癸二酸盐sebaceous 脂肪的sebastianite 黑云钙长岩sebcha 盐沼SEbE 东南微东sebja =sebjet 盐沼sebkha =sebkra 盐沼SEbS 东南微南SEC 空间排阻色谱SEC 趋肤效应校正SEC 线圈系误差校正sec-butyl alcohol 仲丁醇sec. ar. 截面积sec. 部分;截面sec. 二次的;次的;二次绕组sec. 秒sec. 正割secant conic chart 割圆锥投影地图secant meridian 割经线secant method 割线方法secant projection 正割射影secant Young's modulus 割线弹性模量secant 正割SECDED 单错校正双错检测Secenov's coefficient 谢赛诺夫系数secernment 区分;鉴别;分开sechron 层序年龄seclusion 隔离secohm 秒欧secohmmeter 电感表secohopane 断藿烷second anode 第二阳极second arrival 续至波second cosmic velocity 第二宇宙速度second critical angle 第二临界角second crop oil 二茬油second crop 再运移;次生出露物second cycle basin 二次循环盆地second deformation 第二期变形second derivative calculation 二次微商计算second derivative 二阶导数second development 二次显影second harmonic distortion 二次谐波失真second iteration 二次迭代second law of thermodynamics 热力学第二定律second mate 二副second member 右端second moment norm 二阶矩范数second mortgage 第二抵押second officer 二副second order buckling 二次弯曲second order difference 二阶差分second order differential equation 二阶微分方程second order effect 二次项效应second order linear differential equation 二阶线性微分方程second order loop 二阶环路second order reaction 二级反应second order transition temperature 二级转变温度second order transition 二级转化second parameter 二次参数second phase 次相second power 二次幂second rank tensor 二级张量second spinning reel 第二导丝盘second spreading-center 次级扩张中心second time derivative 二阶时间导数second track 第二道second twist 复捻second 秒;第二;次的second-channel interference 第二波道干扰second-derivative map 二次微商图second-order cycle 二级旋回second-order Doppler shift 二次多普勒位移second-order fault zone 二级断层带second-order fold 次级褶皱second-order multiples 二阶多次波second-order ringing 二次鸣震second-order splitting 二级分裂second-order structure zone 二级构造带second-order surface multiple 地面二次波second-order thrust 二级冲断层second-phase fold 第二幕褶皱second-stage separator 二级分离器second-twist-throwing frame 复捻捻丝机secondaries 二次波secondary acetate 次级醋酯纤维secondary air 二次风secondary alcohol 仲醇secondary alkalinity 次生碱性secondary alternating magnetic field 二次交变磁场secondary amine 仲胺secondary anomaly 次生异常secondary arc 次生弧secondary backfill 二次回填secondary battery 蓄电池secondary beneficiary 第二受益人secondary breccia 次生角砾岩secondary building unit 二级构造单元secondary calibration 二级刻度secondary carbon 仲碳原子secondary cell 蓄电池secondary cementing 第二次注水泥secondary coil 副线圈secondary combustion 二次燃烧secondary conductor 二次导体secondary consolidation 二次固结secondary constraint 次要约束条件secondary control 二等控制secondary cracking 二次裂化secondary creep 第二潜伸secondary current 次生电流secondary cyclone 二级旋风分离器secondary depletion 二次采油secondary deposit 次生矿床secondary dispersion halo 次生分散晕secondary drainage curve 二次排泄曲线secondary effect 副效应secondary energy 二次能源secondary enlargement 次生扩大secondary enrichment zone 次生富集带secondary era 中生代secondary excitation 二次激发secondary exploitation 二次采油secondary explosive 传爆炸药secondary extinction 次级消光secondary fault block 次级断块secondary fault 次生断层secondary field 二次场secondary filtration 二次过滤secondary fissure 次生裂缝secondary flood 注水二次开采secondary flow 二次流secondary flowage 滑移流动secondary fluorescence 次生荧光secondary foci 次焦点secondary fold 次生褶皱secondary fossil 次生化石secondary fracture 次生裂缝secondary free-gas cap 次生游离气顶secondary gas cap 次生气顶secondary gas recovery 二次采气secondary gas-oil pool 次生油气藏secondary gelling agent 二次胶凝剂secondary geosyncline 次生地槽;后成地槽secondary group 中生界secondary industry 第二产业secondary instrument 二次仪表secondary interstice 次生孔隙secondary isochron 二次等时线secondary kick 次生井涌secondary leached porosity 次生淋滤孔隙度secondary leakage 二次泄漏secondary liability 第二责任债务secondary limestone 次生石灰岩secondary lobe 旁瓣secondary magnetic field 次生磁场secondary mantle flow model 次生地幔流模式secondary market 次级市场;二级市场secondary memory 辅助存储器secondary meridian 副子午线secondary migration 二次运移secondary mineral 次生矿物secondary miscible flood 二次混相驱油secondary modulation 二次调制secondary noise 次生噪声secondary oil generation theory 二次生油说secondary oil recovery 二次采油secondary oil removal tank 二次除油罐secondary oil response rate 二次开采见效油产量secondary oil-gas pool 次生油气藏secondary operating standard 二级操作标准secondary option 第二选件secondary order fault 次级断层secondary origin 次生成因secondary orogeny 次生造山运动secondary outgrowth cementation 再生生长胶结secondary performance 二次开采动态secondary phase factor 二次相位因子secondary phase of oil production 二次采油阶段secondary plasticizer 助增塑剂;次级增塑剂secondary pore system 次生孔隙secondary pores 次生孔隙secondary porosity index log 次生孔隙度指数测井secondary porosity index 次生孔隙度指数secondary porosity 次生孔隙度secondary precipitate 二次沉淀secondary processing 二次加工secondary product 副产品secondary production 二次开采secondary publications 二次文献secondary pulse 二次冲击secondary radiation effect 二次辐射效应secondary reaction 二次反应secondary recovery factor 二次采收率secondary recovery method 二次开采法secondary recovery mode 二次开采模式secondary recovery operation 二次采油作业secondary recovery stage 二次开采阶段secondary recovery waterflood 二次开采注水secondary recovery 二次开采secondary recycling 二次再生secondary reference fuel 副标准燃料secondary reflection 次级反射secondary refraction 续至折射secondary replacement 次生交代secondary reserves 二次可采储量secondary resinite 次生树脂体secondary risk 次级风险;派生风险secondary rock 次生岩secondary roof seal 浮顶二次密封secondary salinity 次生盐度secondary silica cementation 次生二氧化硅胶结secondary silica outgrowth 次生硅质增生secondary standard 二次标准secondary steam 二次蒸汽secondary storage 辅助存储器secondary store 辅助储备secondary stratification 次生层理secondary stratigraphic trap 次生地层圈闭secondary stress 次应力secondary structure 次生构造secondary suspended solids 次生悬浮物secondary tectonic overlap 次生构造超覆secondary tectonite 次生构造岩secondary treating 二次处理secondary tube waves 二次管波secondary unconformity trap 次生不整合圈闭secondary undulation 副振动secondary units 二级单位secondary voltage 次级电压secondary volumetric sweep efficiency 二次采油体积波及系数secondary water 次生水secondary waterflood reserves 注水二次采油储量secondary wave 次波secondary wind girder 加强圈secondary winding 次级绕组secondary 次要的Secondary 第二纪;中生代的;仲;二代secondrate optimization method 次优化方法seconds counter 秒表seconds Saybolt Furol 赛氏重油粘度秒seconds Saybolt Universal 赛氏通用粘度秒secqt 秒夸脱secrecy and confidentiality clause 保密条款secrecy 秘密;保密;隐蔽secret code 密码secret of the trade 商业秘密secretariat 秘书组secretary general 秘书长secretary 书记;秘书;干事;大臣;部长secrete 分泌;分泌物;隐藏secretion 分泌;空隙充填secretive 保密的;分泌的SECT line 趋肤效应伴热管线SECT 趋肤效应伴热sect. 部分;节;段sectile 可切的section drawing 剖面图section gauge logging 井径测井section gauge 剖面规;截面测量section house 工区房屋section line 剖面线;分区线;截线section mill cutter 套管磨铣工具section mill 截面铣鞋section milling 分段磨铣section model 剖面模型section modulus 断面模数section modulus 剖面模数section multiple 层间多次反射section of reservoir 地层的单元;油层剖面section paper 方格纸section plotter 剖面仪section purging 管段吹扫section steel 型钢section 剖面section-chord technique 截面弦法section-dependent equalization 与剖面有关的道平衡sectional area 截面积sectional bailer 多段捞砂筒sectional box dock 分节浮坞sectional convergence of reserves 油藏各部分的储量分布sectional drawing 断面图sectional elevation 立剖面图sectional material 型材sectional ring rubbers 多段橡皮环sectional turbodrill 多级涡轮钻具sectional view 剖面图sectional 分区的sectionalized derrick 折叠式井架sectionalized jacket 分段式导管架sectionalized 分段sectionally continuous 分段连续sectionally smooth 分段光滑sectioned drilling mast 分块式钻井井架sectionlization 分段sector display 扇形扫描sector fault 扇形断层sector gear 扇形齿轮sector planning 行业规划sector scanning 扇区扫描sector shaft 扇形齿轮轴sector velocity function 扇形速度函数sector 扇形sectorial pipe-coupling method 分段连接管道法sectoring 扇形扫描;扇形变异sectrometer 真空管滴定计secular compaction 缓慢压实作用secular crustal deformation 地壳缓慢变形secular drift 缓慢漂移secular equation 特征方程secular gravity variation 长期性重力变化secular movement 地壳缓慢升降运动secular rise 长期上升secular sinking 长期下沉secular subsidence 长期缓慢沉降secular trend 长期趋势secular upheaval 长期缓慢上升secular variation 长期变化secular 长期的secundine dike 胎盘岩墙secure 安全的secured loan 抵押放款securing band 安全带securities market 证券市场securities portfolio management 一揽子证券管理securities 有价证券security code 安全码security door 保险门security exchange 证券交易security factor 安全系数security level 安全水平security official 安全员security price 证券价格security rating 证券分级security system 安全防范系统security 安全sed 沉积物SED 光谱能量分布sedan 轿车sedarenite 沉积砂屑岩Sedco Ico. 赛德科公司sedentary deposit 原地沉积sedentary product 风化产物sedentary 残积的sediment bar 边缘沙洲sediment box 沉淀箱sediment by extraction 抽提法沉淀试验sediment column 沉积柱sediment compaction 沉积物压实作用sediment gravity flow 沉积物重力流sediment incrustation 积垢sediment pile 沉积物堆积sediment sampler 底泥采样器sediment supply 沉积物补给sediment trap 沉积区;沉积物收集器sediment 沉淀;沉积物;油脚;残渣sediment-induced deformation 沉积物诱发变形sediment-ingesting animals 食沉积物的动物sediment-laden pipeline 充满沉积物的管道sediment-size frequency distribution 沉积物粒度频率分布sedimental 沉积物的sedimentary basin 沉积盆地sedimentary blanket 沉积盖层sedimentary breccia 沉积角砾岩sedimentary column 沉积柱sedimentary compaction 沉积压实作用sedimentary compensation 沉积补偿sedimentary complex 沉积杂岩sedimentary context 沉积环境sedimentary cover 沉积盖层sedimentary cycle 沉积旋回sedimentary deposit 成层沉积sedimentary derivation 沉积来源sedimentary differentiation 沉积分异作用sedimentary dynamics 沉积动力学sedimentary ecology 沉积生态学sedimentary environment 沉积环境sedimentary facies 沉积相sedimentary fault 生长断层sedimentary formation 沉积地层sedimentary gap 沉积缺失sedimentary history 沉积史sedimentary imput 沉积输入sedimentary interstices 沉积岩孔隙;沉积生成孔隙sedimentary lag 沉积滞后sedimentary loading 沉积载荷sedimentary mantle 沉积覆盖层sedimentary mineralogy 沉积矿物学sedimentary origin 沉积成因sedimentary outer arc 沉积外弧sedimentary overlap 沉积超覆sedimentary peat 沉积泥炭sedimentary petrography 沉积岩类学sedimentary pile 沉积堆sedimentary porosity 沉积孔隙度sedimentary province 沉积区sedimentary rhythm 沉积韵律sedimentary rock 沉积岩sedimentary section 沉积剖面sedimentary sequence 沉积层序sedimentary series 沉积层系sedimentary structure 沉积构造sedimentary succession 沉积层序sedimentary supply 沉积物补给sedimentary tectonics 沉积大地构造sedimentary trap 沉积圈闭sedimentary veneer 沉积盖层sedimentary vulcanism 沉积火山作用sedimentary wedge 沉积楔sedimentary 沉淀的sedimentation basin 沉积盆地;沉淀池sedimentation coefficient 沉积系数sedimentation constant 沉积常数sedimentation curve 沉积曲线sedimentation diameter 沉积直径sedimentation disturbance 沉积干扰sedimentation gradient 沉积梯度sedimentation model 沉积模式sedimentation potential 沉积电位sedimentation rate test 沉积速率试验sedimentation tank 沉降罐sedimentation type 沉积类型sedimentation unit 沉积单位sedimentation velocity 沉积速度sedimentation volume 沉积体积sedimentation 沉积sedimentation-equivalent particle 沉积等效颗粒sedimentation-size analysis 沉积量值分析sedimentationist 沉积岩学者sedimentator 沉淀器sedimento-eustasy 沉积海面变动sedimentoeustatism 沉积海面变动sedimentogeneous rock 沉积岩sedimentogenic 沉积成因的sedimentography 沉积岩相学sedimentological 沉积学的sedimentologist 沉积学者sedimentology 沉积学sedimentometer 沉淀计sedimentophile 亲沉积的sedimentous 沉积的see-through section 透明管段seed bag 亚麻子袋油管封隔器;特制封隔器seed 种子seeder 播种者seedholder 籽晶夹持器seeding polymerization 接种聚合seeding 播种;引晶技术;强化seeing 视觉seek delay 查找延迟seek time 查找时间seek 寻找seeker 探索者Seelandian 西兰阶seep oil 渗至地面的油seep water =seepage waterseep 渗出seepage discharge 渗透流量seepage flow 渗流量seepage force 渗透力seepage line 渗流线seepage loss 渗透损失seepage oil 油苗seepage pressure 渗透压力seepage refluction 渗透回流seepage reflux 渗透回流seepage up-dip 沿倾斜向上的渗出。
DIN 7603 2001-05_en_Sealing rings
ICS 23.040.80DichtringeIn keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.ForewordThis standard has been prepared by Technical Committee Rohrverschraubungen of the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Pipelines and Pressure Vessels Standards Committee).AmendmentsThis standard differs from the November 1994 edition as follows:a)The dimensions and mass of ring seals and gaskets which are not to be used for new designs are now dealt with in Appendix A.b)Dimension r 1 has been specified for type C gaskets.c)Dimension d 1 has been corrected for gaskets of nominal size 21×26.d)The specifications for service temperatures have been amended (cf. table 3).e)The standard has been editorially revised.Previous editionsDIN 7603: 1936-07, 1941x-05, 1961-01, 1961-09, 1968-03, 1994-11.DEUTSCHE NORM May 20017603{Continued on pages 2 to 10.Ring seals and gasketsTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.All dimensions are in millimetres.1ScopeThis standard specifies dimensions and materials for ring seals and flat or filled gaskets designed for use with compression couplings (e.g. as specified in DIN 3850 or DIN 7601) or pipe plugs (as specified in DIN 908).2Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies.DIN 908Hexagon socket screw plugs with parallel screw thread DIN 3850Compression couplings –OverviewSupersedesNovember 1994 edition.+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rPage 2DIN 7603:2001-05DIN 7601Compression couplings with ball-type nipples –Overview DIN 7737Vulcanized fibre products –TypesDIN EN ISO 6506-1Metallic materials –Brinell hardness test –Part 1: Test method (ISO 6506-1:1999)3Dimensions and designationThe designs shown are for illustrative purposes only, but the dimensions of rings seals and gaskets shall be as specified.Type A Flat gasketType C Filled gasketType D O-ring1)r 1=h /2.Figure 1: Gasket and ring seal dimensions (notation)Designation of a type A gasket (A) of nominal size 16×20, made of vulcanized fibre (Vf):Gasket DIN 7603–A 16×20–Vf1)Approx. sheetthickness: 0,3mm.1)+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rTable 1:Gasket and ring seal dimensionsNominal sizeType AType CType DMateriale Maxi-mum size(continued)1)These sizes are particularly suitable for use with air brakes (materials: Zn and Vf).d 2d 1r 2h1)1)1)1)Page 3DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rNominal sizeType AType CType DMateriale Maxi-mum sized 2d 1r 2hTable 1 (continued)(continued)Page 4DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rNominal sizeType AType CType DMateriale Maxi-mum sized 2d 1r 2hTable 1 (concluded)Table 2:MassMass per 1000 units, in kg (t 25%)1)Nominal sizeType A Type CType D1)Mass calculated taking the density as1,8kg/dm 3 for FA 1,3kg/dm 3 for Vf 2,7kg/dm 3 for A l 7,85kg/dm 3 for St8,9kg/dm 3 for Cu 1,2kg/dm 3 for asbestos-free filler material (type C)7,14kg/dm 3 for Zn Page 5DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rTable 2(concluded)Mass per 1000 units, in kg (t 25%)1)Nominal sizeType A Type CType DSee page 5 for 1).Page 6DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y r4MaterialsThe type of ring seal or gasket is to be selected as a function of the application, medium conveyed and service temperature and shall be the subject of agreement between manufacturer and user.The material specifications for types A and D gaskets shall be taken from table 3, those for type C gaskets from table 4. Use of other materials shall be the subject of agreement.Table 4: Type C gasketsGasketSymbolMaterialMaximum service Typetemperature, in °CAluminium of grade Al99 (F11);A l FA hardness 32HB to 45HB 1),200C with an asbestos-free fillerCuFA Copper; hardness: 45HB maximum 1),300C with an asbestos-free fillerStFASoft iron; hardness: 80HB to 95HB 1),400Cwith an asbestos-free filler1)See DIN EN ISO 6506-1 for hardness testing.Table 3: Types A and D ring seals and gasketsRing seal or gasketSymbol MaterialMaximum service Type(s)temperature, in °CFA 1)Asbestos-free material 1)150A A l Aluminium of grade Al99 (F11);200 A and D hardness: 32HB to 45HB 2)Cu Copper; hardness: 45HB max.2)300 A and DPrg Impregnated paper 120A Pr Unimpregnated paper80A St Soft iron; hardness: 80HB to 95HB 2)400A and DVf Vulcanized fibre of type Vf 3110100 (min 24h)3) Aor Vf 3111 as in DIN 7737ZnZinc of grade 99,5300A1)Materials suitable for higher service temperatures shall be the subject of agreement.2)See DIN EN ISO 6506-1 for hardness testing.3)Short-term water vapour resistance at 160°C.Page 7DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rAppendix ADimensions and mass of ring seals and gaskets which are not to be used for new designsTable A.1:Dimensions(continued)Nominal sizeType AType CType DMateriale Maxi-mum sized 2d 1r 2hPage 8DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rTable A.1 (concluded)Nominal sizeType AType CType DMateriale Maxi-mum sized 2d 1r 2hTable A.2: MassMass per 1000 units, in kg (t 25%)1)Nominal sizeType A Type CType D1)Mass calculated taking the density as1,8kg/dm 3 for FA 1,3kg/dm 3 for Vf 2,7kg/dm for A l 8,9kg/dm 3 for Cu 1,2kg/dm 3 for asbestos-free filler material (type C)Page 9DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y rTable A.2 (concluded)Mass per 1000 units, in kg (t 25%)1)Nominal sizeType A Type CType DSee page 9 for 1).Page 10DIN 7603:2001-05+ S h o p 30.11.2012 853285-1, S T E Y R M O T O R S G m b H , I m S t a d t g u t B 1,4407-S t e y r。
Sealing means for shafts
专利名称:Sealing means for shafts 发明人:JR. SAMUEL F. DUPREE申请号:US9420336申请日:19360804公开号:US2203525A公开日:19400604专利内容由知识产权出版社提供摘要:499,775. Bearings ; stuffing - box substitutes. DUPREE, JUN., S. F. July 28, 1937, No. 20922. Convention date, Aug. 4, 1936. [Class 12 (i)] [Also in Group XXVI] A unitary bearing assembly for pumps comprises a housing 6 which can be removably fitted within a seat 5 in the pump body 1, a sealing ring 22 pressed against the housing by a resilient member such as a spring 30, shaft bearings 7, 10, and lubricant receiving means therefor. As shown, the bearings 7, 10, are cylindrical bushes having lubricant channels 13, 14. A thrust collar 33 is fixed on the shaft 11. The housing 6 has oil passages 15, 16, communicating with an oil reservoir 12 in the pump body. A packing device comprising a ring 27 and spring 30 is mounted within a cavity formed in the pump impeller 26, the ring 22 having projections 23 engaging slots in the boss 25 of the impeller so that it rotates with the shaft. One or both bearings 7, 10, may be replaced by ball bearings, and instead of the ring 22 engaging a boss 21 on the housing, it may engage an inwardly turned part of the housing as shown in Fig. 20. In addition the sealing members 30a, 87, Fig. 20, may be mounted within a cup 65 fixed to the spindle. The ring 87 is U-shaped and the face bearing against the ring 22 may be grooved. In a modification, the side flanges of the ring 87 project radially inwardly.申请人:DUPREE JR SAMUEL F更多信息请下载全文后查看。
密封剂和密封Sealants and Sealing
Sealants and SealingINTRODUCTIONGENERALSealing is a vital process in the manufacture of today’s commercial aircraft. Sealants are used to contain fuel, maintain cabin pressure, reduce fire hazards, exclude moisture, prevent corrosion, and fill gaps and smooth discontinuities on the aircraft exterior. All of these sealing functions are important and affect the performance of the aircraft. For example, fuel tank sealing is critical because fuel leakage is a safety item that can result in grounding the aircraft until the problem is corrected. Sealing for corrosion prevention must be done properly or in-service problems requiring extensive maintenance may occur.These considerations indicate how important proper sealing is. It directly affects the quality and reliability of aircraft.DEFINITION OF SEALINGSealing is a process that confines liquids and gases within a given area or prevents them from entering areas from which they must be excluded. Sealing is accomplished by closing all structural passages that these fluids can penetrate. The material used to seal these passages is applied as a wet, flowable paste. After a period of time, the sealant “cures” to form a rubbery solid that adheres firmly to the surfaces it contacts.LEVELS OF SEALINGThe level of sealing required for a given area is defined by the applicable construction and assembly drawings and is dictated by engineering considerations. The four levels of sealing are absolute, extensive, intermediate, and limited. The absolute level of sealing represents the most demanding requirements, and the limited level, the least. Precise definition of which types of structure must be sealed for each level of sealing are found in A/C manufactures general sealing process specifications. (See Boeing BAC 5000, Canadian MPS 142-4 and DeHavilland PPS 21.21 etc.)FUNCTIONS OF SEALSFuel AreasIn integral fuel tanks, seals must contain fuel for the life of the airplane under various conditions of temperature, pressure, and structural loading.Pressurised AreasSeals maintain pressure at a predetermined minimum level under all flight conditions. Environmental AreasSeals on exterior surfaces prevent water and other fluids from entering and also function as aerodynamic smoothers.Corrosion AreasSeals protect the structure by preventing entry of corrosive fluids.Electrical AreasSeals provide protection for electrical components.Firewall AreasSeals prevent spread of flames beyond the firewall until fire can be extinguished.Acid AreasSeals protect structure from attack by battery acids.ENVIRONMENTSSealants must maintain adhesion to the structure and have sufficient flexibility to function effectively under a variety of environmental and stress conditions:∙Differential pressures may vary from small negative values to positive values of approximately 11 lb/in2.∙The operating temperature range is approximately -65°F to 160°F (400°F in some localized high-temperature areas).∙Structural loads during flight and ground operations cause deflections, which the sealant must be able to withstand at all operating temperatures.TYPES OF SEALSFillet SealsFillet seals are applied at the edges of structural joints. They consist of beads of sealant that must adhere firmly to the structure on both sides of the seam being sealed and must conform to the dimensional requirements of the process specification. Fillet seals are used where maximum protection from fluid leakage is required, such as in fuel and pressure areas.Injection SealsInjection seals are applied to fill channels and holes that occur as a result of the structural design. Quite often injections are required to continue or to back up a fillet seal.Faying Surface SealsFaying surface seals consist of a layer of sealant sandwiched between two fastened mating surfaces. These seals are used primarily to prevent corrosion of aircraft structure and to facilitate leak tracing in the fuel tank.Prepack SealsPrepack seals are installed prior to assembly to fill structural cavities that are enclosed after assembly and cannot be properly injected.Brush Coat SealsBrush-coat seals, as the name implies, are formed by brushing the sealant into place. The sealant is a low-viscosity material that is easily applied in this manner. The method is principally used in applying a sealant precoat prior to fillet sealing the integral fuel tank. Brush coating is also commonly used to seal exposed ends of fasteners against corrosion.THE SEAL PLANEThe seal plane is the structural boundary on which the continuity of seal is established. For example, in integral fuel tanks (conventional aircraft structures sealed for the containment of fuel), the seal plane consists of the barrier beyond which fuel may not pass. This barrier consists of structure, fasteners, and sealant.Typical Integral Fuel tank StructureWHEN USING PRC∙Read the appropriate MSDS sheet∙Use correct type of protective gloves∙Mix by weight (get used to colour of a proper mix)Balance scale with mixing plate and mix stick firstUse separate clean sticks to take catalyst and base compounds out of their containers▪Do not get catalyst (part B) in can (part A) or vice versa Leave catalyst (part B) and can (part A) clean∙Use paper under mixing palate and mixing tools when you lay them on the bench∙Put masking paper under your project when applying the sealant∙Spread sealant evenly using spatula, brush or small roller∙Secure parts using clecos∙When riveting, wipe excess sealant from rivet tails with small cloth or paper before bucking∙Clean up clecos in acetone∙When finished, wrap used mixing palate and mixing sticks in paper and place in garbage∙Cleanup∙Leave area cleanEQUIPMENT AND MATERIALSCLEANING EQUIPMENT AND MATERIALSVacuum CleanerThe vacuum cleaner removes aluminum shavings, chips and other debris from areas to be sealed.BrushesBrushes are used for removing loose materials and for preliminary solvent cleaning to remove heavy soils. Stencil brushes or trimmed paintbrushes with short stiff bristles are best.Cheesecloth (or other approved wiping materials)Wipers are used for preliminary and final solvent cleaning of areas to be sealed.Pipe CleanersPipe cleaners are used for solvent cleaning channels and other inaccessible structural areas prior to sealing. Cotton swabs are also useful for this purpose.SolventsSolvents are used for cleaning structure prior to sealing. Solvents used for cleaning must be approved by the applicable sealing process specification. Methyl ethyl ketone (MEK) is commonly used. Approved metal safety cans are to be used for solvent storage.Plastic Squeeze BottlesPlastic squeeze bottle are used for dispensing solvent onto wiping materials when cleaning surfaces prior to sealing. Transfer solvent from safety can to squeeze bottle for cleaning operations. Note: all bottles of solvent or any other substance must be labelled and used in accordance with WHMIS regulations.APPLICATION EQUIPMENTSealant GunInitial application of sealants is generally made with a standard air-operated sealant gun. A sealant-filled cartridge is inserted into the barrel of the gun. A plunger at the upper end of the cartridge and a cap at the reduced-diameter lower end contain the sealant. After removal of the cap, a nozzle of the desired configuration is attached to the lower threaded end of the cartridge. Sealant is extruded when the trigger is depressed to open an air valve, allowing pressure to be applied against the plunger.NozzlesNozzles are available in assorted sizes and shapes for various sealing requirements and are made of the same type of plastic material as the cartridge. Some types of nozzles may be cut at the tip to provide a more convenient angle or diameter for application of sealant. Multiple orifice nozzles are available for more rapid spreading of sealant over relatively large areas for faying surface sealing.RollersBoth metal and rubber rollers are available to spread sealants for faying surface sealing. Rubber rollers of approximately 50 Shore “A” durometer hardness are superior and recommended for use. Another method of achieving a roller with satisfactory hardness is to build up several layers of sealant on a miniature paint roller and periodically remove some of the cured sealant with a belt sander. These rollers do a better job of spreading the sealant and are effective in keeping it out of previously drilled fastener holes.ScrapersPlastic scrapers are also used to spread sealant over a surface. These are recommended for situations where using a roller would be awkward because of access or other considerations.Fairing ToolsFairing tools are used to work applied sealant to the required fillet configuration. Specially designed spatulas, nozzles, tongue depressors, brushes, or any suitable tool may be used.MirrorsOccasionally, cleaning and sealing operations must be accomplished in areas that are out of the sealer’s dire ct line of sight. In such situations, a swivel-handled mirror provides the visibility needed to perform the job successfully.MiscellaneousSome sealants of very thin consistency may be applied by spraying. In this case, standard paint spray equipment is used. These sealants may also be applied by a special Boeing-developed roller system. This consists of a 3-in-wide section of paint roller with a perforated shell. A formed section of stainless steel tubing attaches the roller to a standard sealant gun and sealant-filled cartridge. Sealant is fed to the interior of the roller and can be extruded through the perforations as required for application.SEALING COMPOUNDSDESCRIPTIONSealing compounds are synthetic rubber materials that are applied in a flowable consistency and cure by chemical reaction to a solid with elastomeric properties. Most of the sealants you will use in your job are known chemically as polysulfides. Some silicone sealants are used where their special properties are required. All polysulfides are two-part materials and cure is initiated when the rubber polymer base is combined with an accelerator. Some silicones cure in the same manner, and others are one-part materials that cure by reaction with atmospheric moisture.Most two-part sealants are purchased in kit form and must be mixed and used, or quick-frozen and stored under refrigeration. Some two-part materials, however, are purchased premixed and frozen.Logistical considerations, such as maintenance of sealing inventories in the shops, usually make it impractical to use a sealant immediately after mixing. Therefore, quick-freezing and frozen storage are used to prevent initiation of the curing reaction. When thawed for use on the airplane, the sealant is then essentially in the same condition as when it was first mixed.SPECIFICATION CLASSIFICATIONSThe classification system for sealants in Boeing material specifications (BMS’s) is as follows:Class A-Brushcoat Sealant. Thinned with solvent to provide viscosity suitable for brushing.∙Class B-Filleting Sealant. Relatively heavy consistency with good thixotropic (low-slump) properties.∙Class C-Faying Surface Sealant. Medium consistency for good spreadability.∙Class D-Hole-Filling Sealant. Similar to Class B with very low slump.∙Class E and F-Sprayable Sealants.PROPERTIESEach individual sealant is compounded to provide the specific combination of properties desired. Properties significant to you as a sealer are as follows. Application TimeApplication time is the time in hours after thawing during which the sealant can be readily extruded from the sealant gun and applied tot he structure. The application time is included in the universal classification system as a dash number following the classification letter (except for Class C). For example, Class B-2 indicates a fillet sealing material with a minimum application time of 2 hours. Application time is not applicable to one-part sealants.Squeeze-Out LifeSqueeze-out life is the time in hours after thawing during which a faying surface sealant can be squeezed out of a joint when fasteners are installed. The squeeze-out life is included in the universal classification system as a dash number following the Class C designation. For example, Class C-20 indicates a faying surface sealant with a minimum squeeze-out life of 20 hours.Tack-Free TimeTack-free time is the time in hours after thawing (after application for one-part silicones) that is required for the sealant to cure sufficiently so that it will not transfer to the finger or to a plastic film.Cure TimeFor manufacturing purposes, cure time is the time in hours after thawing (after application for one-part silicones) that is required for the sealant to cure firmly enough to be handled without damage or deformation. After cure time has elapsed, manufacturing operations such as drilling and fastening can be performed without damage to the sealant. Maximum allowable cure times are specified in the applicable BMS, and typical cure times for most sealants are given in process specification.(See Boeing BAC 5000, Canadian MPS 142-4 and DeHavilland PPS 21.21 etc.)Environmental EffectsAll the properties listed are related to each other and are a function of the cure rate. The cure rate is strongly influenced by temperature and humidity, and is directly proportional to both; i.e., lower than normal temperature and humidity retard the cure rate and higher than normal temperature and humidity increase the cure rate.SPECIAL PRECAUTIONS FOR SILICONES∙Uncured silicones readily absorb carbon dioxide (CO2). This will cause severe bubbling or foaming of the sealant. Therefore, all uncured silicone sealants, even those in plastic cartridges, must be protected from contact with CO2 sources, especially dry ice. Under no circumstances shall mixed, two-part silicones be stored in C02-type freezers. Mechanical freezers only shall be used.∙Silicones must be stored separately from other sealants to prevent cross contamination.∙When applying silicone sealants, do not contaminate adjacent areas. Silicones act as a release film and will prevent adhesion of any subsequently applied finishes.∙Tools used for silicone sealant shall be used for these sealants only. Do not use for any other materials.WARNING:COMPONENTS OF SOME SEALANTS ARE TOXIC AND CAN BEABSORBED THROUGH THE SKIN. SKIN CONTACT SHOULDBE AVOIDED. USE GLOVES AS REQUIRED. WHEN SKINCONTACT OCCURS, REMOVE THE SEALANT AND WASH THEAFFECTED AREA. NEVER USE YOUR FINGERS TO SMOOTHFILLETS—ALWAYS USE A FAIRING TOOL.SEALING PROCESSESMIXINGGeneralTwo-part sealants must be completely mixed. If sealant is completely mixed, colour will be uniform throughout. A streaked appearance is evidence of incomplete mixing.CAUTION: INCOMPLETE MIXING MAY AFFECT CURE AND PERFORMANCE PROPERTIES OF THE SEALANT.Machine MixingMost of the sealant you use will be mixed by specialized machines in their labelled plastic cartridges. Machine mixing provides the most reliable, consistent material and is the only way that high-volume usage requirements can be met. Machine mixing is described in the Avcorp/BCIT Module 7 “Mixing of Sealants”.Hand MixingIt may be necessary to hand mix a quantity of sealant. Kits of the material needed are available.To hand mix sealant kits proceed as follows:∙Check label to verify that you have the correct material and that the expiration date has not been exceeded.∙Stir accelerator thoroughly until all solids are dispersed and a smooth, uniform material is obtained. (Accelerator may be either a liquid or a paste.)∙Add the entire accelerator to the base container and mix thoroughly, using a spatula or other suitable tool until a uniform blend with no evidence of streaking is obtained. Verify that there is no unmixed base or accelerator in the container.In cases where less than the entire volume of the container is needed, proceed as follows:∙Check label to verify that you have the correct material and that the expiration date has not been exceeded. Also note the ratio of base to accelerator required.∙Mix accelerator thoroughly until all solids are dispersed and a smooth, uniform material is obtained. (Accelerator may be either a liquid or a paste.)∙Place a mixing plate (a piece of scrap aluminum) and mixing stick on a scale and zero the scale.∙Use the mixing stick to place the required amount of base compound on the mixing plate. Note the weight of the base compound.∙Using a clean stick, add the required weight of accelerator to the mixing plate.(Be certain not to contaminate either the base with the accelerator or vice-versa.)∙Mix the base and the accelerator together completely to achieve a smooth, streak free consistency.THAWINGObtain cartridges of the frozen sealant needed from the freezer. Verify that you have the correct material and that the expiration date has not been exceeded.Thaw Sealant to Room Temperature.Allow sealant to thaw to room temperature before using. Five to 10 minutes in warm water or approximately 30 minutes at room temperature is usually sufficient. CAUTION: MAKE SURE THAT SEALANT IS COMPELTELY THAWED, AS COLD SEALANT WILL NOT ADHERE TO THE STRUCTURE.PROPERLY THAWED SEALANT WILL FLOW EASILY FROMTHE GUN AND WILL READILY “WET” THE SURFACE.Do Not RefreezeNever refreeze thawed sealant.CLEANINGGeneralThe importance of cleaning cannot be overemphasized. Sealant will not adhere to any surface that is contaminated. A thorough cleaning job is one of your most important responsibilities.Preliminary CleaningRemove all chips, shavings, and other loose materials with a vacuum cleaner. Remove all heavy soils and contaminants, using a stiff-bristled brush and solvent. Cheesecloth and other approved wipers may be used if desired instead of a brush. If there is nodebris or sever contamination in the area to be sealed, preliminary cleaning may be omitted.Final CleaningPerform final cleaning immediately prior to sealing. Dampen clean wiping material with solvent and wipe the area to be sealed. Before the solvent evaporates, wipe the area again with clean, dry wiping material. Repeat these steps until there is no visible contamination on the wipers. Traces of primer that may be present on wiping materials do not constitute contamination.∙If the total area to be cleaned is large, do not try to clean it in one operation.This will allow the solvent to evaporate and wipers to become contaminated.Clean smaller areas progressively until the total area has been cleaned.∙Always clean an area wider than the area to which sealant will be applied. CAUTION:FOR ALL CLEANING OPERATIONS, USE ONLY THOSE WIPING MATERIALS AND SOLVENTS THAT ARE APPROVEDBY THE APPLICABLE PROCESS SPECIFICATION. WARNING:SOLVENTS ARE EITHER (1) FLAMMABLE AND TOXIC, OR (2) TOXIC. CONSULT WHMIS MSDS SHEETS FOR INFORMATIONON THE SAFE USE OF SOLVENTS.APPLICATION OF SEALANTGeneral∙Apply sealants to clean surfaces only. Before applying any sealant, verify that cleaning has been accomplished in accordance with the requirements previously described.∙Verify that you have the correct sealant for the job and that the sealant has not been stored beyond its expiration date (see label for expiration date).∙Verify that the sealant is completely thawed and that the temperature of the structure is 5OoF or greater. Application of cold sealant or application to cold structure results in poor adhesion because of condensation of moisture from the air.∙Insert the sealant cartridge in the gun and install a nozzle suitable for the sealing job.Fillet SealingPlace the nozzle tip in the corner of the seam to be sealed and extrude a continuous bead of sealant. Obtain the general fillet size desired by regulating the sealant flow rate and the speed of gun travel. Always hold the gun in a near-vertical position so that the tip of the nozzle is pushed forward along the joint in the direction of travel.Applying A Fillet SealTypical Fillet ConfigurationsA small bead of sealant should precede the nozzle tip. Dragging the nozzle during filet application can result in air entrapment and undetected voids in the cured fillet with the possibility of subsequent leakage. It must be done very carefully. After application, work out air bubbles and fair the fillet to the required final configuration by use of an appropriate fairing tool. Fillet dimensional requirements are contained in the applicable process specification.Edges of fillets must make continuous contact with the surface. Reentrant fillets are a potential source of failure and are in violation of specification requirements.Injection SealingPlace the nozzle tip at one of the open ends of the channel and extrude sealant until the channel is completely filled, as indicated by appearance of sealant at the other end. Where multiple channels exist, block filled channels to ensure a complete seal.Remove excess sealant, retaining a small amount at each end. Fair this in smoothly with the contacting structure to provide continuity with subsequently applied fillets.Faying Surface SealingApply sealant to one of the two surfaces to be joined. Where the parts to be joined differ significantly in size, sealant is usually applied to the smaller part (e.g., to a spar stiffener instead of a web).Either extrude sealant directly onto one of the surfaces to be joined or, for some joints, extrude a bead along a strip of masking tape located adjacent and parallel to the lengthwise direction of the area of sealant application.Spread the sealant using a roller or plastic scraper so that the surface is uniformly and completely covered. Areas bare of sealant are unacceptable. Thickness of the sealant layer should not exceed 0.005 inches. Too much sealant results in fastening problems and extensive clean up requirements after the joint is assembled. Too little fails to provide a continuous bead of squeezed-out sealant after fastening, as required by the specifications.After fastening of the joint within the squeezed-out life of the sealant, either remove the squeezed-out sealant, or fair in to form a small fillet as required.Prepack SealingApply a small bead of sealant along each corner of the cavity and then pack the entire cavity with an excess of sealant. After assembly, fair extruded sealant to a fillet configuration within the sealant application time.Brush Coat SealingUsing a stiff-bristled brush, apply sealant to locations specified. In the case of fasteners, apply sealant liberally both to the exposed area of the fastener and the immediately adjacent area. In the fuel tank, apply sealant so that the area covered will extend beyond the width of subsequently applied fillets.SPECIFICATION REQUIREMENTS AND SPECIAL PROCESSESGENERAL SEALINGGeneral sealing requirements are covered by specifications (See Boeing BAC 5000, Canadian MPS 142-4 and DeHavilland PPS 21.21 etc.)These cover most sealing other than that done in the integral fuel tank.Fastener SealingAll fastener sealing is a variation of one of the basic sealing processes.Wet Installation∙Flush Head-Apply sealant either to the underside of the head or the countersink immediately prior to installation.∙Protruding Head-Apply sealant to the underside of the head immediately prior to installation.Fillet Sealing∙Fillet seal collar and threaded end of fastener to dimensions specified in specifications (See Boeing BAC 5000, Canadian MPS142-4 and DeHavilland PPS 21.21 etc.)Brush Coating∙Apply brush coat as specified. Use a stiff-bristled brush to apply the specified brushable sealant to the exterior or interior end of thefastener as specified. Cover the entire exposed area of the fastener andextend the application to the adjacent structure for a width of 0.1 to 0.2inches.Electrical SealingWhere required, fillet seal electrical fittings in accordance with procedures described in the fillet sealing section (p. 21). In wire bundle sealing, coat each individual wire with the specified sealant prior to installation. Installation must be completed within the sealant application time. (Sealing of some wire bundles that pass through bulkhead fittings is done according to a special injection method. See the electrical sealing section, p. 28.)Integral fuel tank sealingFuel Tank Sealing Methods∙Fillet sealing is the basic method used for fuel retention within the integral tank. This is the only method that provides a reliablebarrier against fuel leakage.∙Injection seals are used where fillet backup is required or where structural complexity prevents a continuous fillet.∙Prepack seals are used for large structural fittings, such as at tank corners. A structure that is prepacked will always be fillet sealed aswell.∙Faying surface seals are used for isolating leakage. These seals are applied at regular intervals along a joint during the assembly phaseprior to installation of fasteners. Any leakage that may occurthrough a subsequently applied fillet will be confined to thedistance between two isolation seals, making the source of leakageeasy to locate. (Some leak isolation seals are made from thin rubbergaskets. These are installed by mechanics prior to automaticriveting of stringers to wing skins.) Upon rare occasions, fayingsurface seals are also used as primary fuel seals where it isimpossible to apply a fillet seal and structural deflections will notdamage the seal.Apply all seals in the fuel tank in accordance with the methods previously described. All seals except faying surface seals require application of a Class A brush coat (precoat) prior to application of the basic seal.Special Fillet Sealing RequirementsA three-phase system can be used for sealing the integral fuel tank. The process sequence is as follows:∙Apply brush coat.∙Apply small first fillet. Use fairing tool to force sealant into corner of joint.∙Apply full-size final fillet.Fastener SealingSome fasteners within the fuel tank require sealing to prevent leakage. Metal seal caps are generally used. These are lightweight aluminum shells that fit over the protruding end of the fastener. Follow standard cleaning procedures, and then fill the cap with an excess of sealant and press into place on the fastener. When the cap is pressed into position, excess sealant will extrude from around the bottom and from the hole in the top of the cap. Fair the extruded sealant to blend smoothly onto and around the cap. Where seal caps are not used, fillet seal the fasteners, as previously described. AERODYNAMIC SMOOTHING AND WEATHER SEALINGPurposeOn the exterior of the aircraft, skin gaps are filled and surface discontinuities faired in with sealant to provide an aerodynamically smooth surface and to exclude water. Summary of ProcessClean surfaces where sealant will be applied, including gaps. Mask as required. Apply sealant to completely fill gaps, taking care to avoid air entrapment. Smooth uncured sealant flush with skin or masking tape. To bring cured sealant flush with skin, shave with a plastic or wooden tool or abrade by using a rubber wheel mounted on an air motor. Standard fillet sealing methods apply to sealing most skin overlaps and discontinuities. Fair sealant to the required configuration within the application time.LEAK TESTINGIntegral Fuel TankLeak testing of integral fuel tanks is accomplished by coating the exterior with indicator paint, filling the tank with an ammonia/air mixture, and applying a positive pressure. Colour change of the indicator paint indicates a leak. If the source is not immediately apparent, a leak is traced by applying air pressure to the point where the leak appears and brushing a soap solution on the fillet in the suspected area between isolation seals. The point where soap bubbles are generated is the source of the leak. In addition to the ammonia test, pressure drop tests are also conducted. Final verification occurs when the aircraft is fuelled and inspected for leakage.Body Pressure VesselA positive pressure is applied to the cabin area. A drop in pressure to less than a specified level indicates excessive leakage. Leak sources in this area can usually be located by the noise of escaping air.REPAIRRepair procedures refer to fillet seals only.Uncured Sealant (within application time)Remove the defective material with a clean tool and apply fresh sealant.Cured Sealant。
seal的用法总结范文大全
seal的用法总结范文大全n.密封,印章,海豹,封条v.密封,盖章,决定,封上(信封)变形:过去式:sealed;现在分词:sealing;过去分词:sealed;seal用法seal可以用作动词seal用作名词时的意思是“印章”,转化为动词的意思是“盖章于…上”,引申可表示“封”“封口”“封住”“最后确定”等。
seal只用作及物动词,接名词、代词作宾语。
seal用作动词的用法例句Theenvelopewasfirmlysealed.这个信封封得很严实。
Youmustsealuptheenvelopebeforemailingtheletter.你在寄信前必须先将信封密封。
Theysignedandsealedthetreaty.他们在条约上签名盖章。
seal用法例句1、Soldierstherearegoingtosealtheairportoff.那里的士兵将封锁机场。
2、TheRedskinspunted.Dallasthenmarched79yardstosealthevictory.红人队选择了弃踢,达拉斯队随即跑出79码从而锁定胜局。
3、Writeyourletterandsealitinablankenvelope.信写好后把它装进空白信封里封好。
Seal-你喜欢海豹吗今天又是分享新单词的一天!让我们一起学习起来。
正所谓,求知无坦途,学问无捷径。
慢慢来,你想要的终会来到你的身边!小瑾今日与大家分享Seal这个词的常见释义及用法:1、n.封条;封蜡;例句:Thesealontheboxisbroken.--箱子上的封条破开了。
2、n.图章;印章;例句:IfinallygottheRoyalSeal.--我终于拿到了王室的印章。
3、n.海豹;海豹皮;例句:Isawsealsintheaquarium.--我在水族馆里看见过海豹。
4、v.密封;封上;(及物动词,接名词、代词作宾语)例句:Theenvelopewasfirmlysealed.--这个信封封得很严实。
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Sealing bags
There are many different kinds of bags in our dayly life, such as chips bag, candy bag, bread bag… These bags keep the food clean, frensh, and good to save. But we do not always eat up the food when we first open the bags. We might leave some for next time. And at these times, we might find clips or rubber bands to seal them. Today I will show you another two ways to seal bags.
The first way is using a recycling bottle. You just need an empty plastic bottle. First, cut the top of the bottle and clean it. Then you can let the top of the bag cross the bottleneck and turn over the bag. At the end, cover the cap is done.
But if you don’t have these things around you , what will you do? Now I will tell you another very simple and easy way.
You just need an open bag of food and your hands. First, you need to squeeze the air out of the bag by flattening it. It can let it closer to a vacuum environment and keep the food longer. Then you need to roll the top of the bag down to just above the food. After that , you need to fold back two or four centimeters on each side of the bag.And using your thumbs to keep the corners pinned to the bag let the ends won’t unroll. At last, you need to unroll the middle of the fold while also turning it partly inside out and wedging the corners underneath. You might not do it well at first.But after a few times of practising, you’ll get it.
These two ways are very easy, and I think you have already get them. Although these methods can help you keep the rest of the food, I think not to waste them is more important. I hope we can all cherish the food, cherish the farmer’s work achievement. Using your hands to seal bags, and sealing bags to save more food.。