O-Ring Failures：O型圈失效分析
合集下载
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
Suggested Solutions / 解 决 方 法: Remove all sharp edges/清除锋利边角. Proper gland design/沟槽设计更加合理. Proper elastomer sizing/选择尺寸合适的密封件. Higher-modulus/hardness elastomer/选择弹性更大硬度更高的密封件.
O-Ring Failures / O型圈失效分析
Spiral Failure / 密 封 件 卷 曲
Description / 描 述: The seal exhibits cuts or marks which spiral around its circumference/密封件明显呈现卷曲情况.
O-Ring Failures / O型圈失效分析
Over-Compression / 过 度 压 缩
Description / 描 述: The seal exhibits parallel flat surfaces (corresponding to the contact areas) and may develop circumferential splits within the flattened surfaces/密封件接触表面呈 平面变形，并可能伴随裂纹. Contributing Factors / 造 成 原 因: Improper design—failure to account for thermal or chemical volume changes, or excessive compression. /设计不合理：没有考虑到材料由于热量及化学介质引起 的变形，或由于压力过大引起。 Suggested Solutions / 解 决 方 法: Gland design should take into account material responses to chemical and thermal environments. /沟槽的设计应考虑到材料由于温度及化学介质引起的变形。
O-Ring Failures / O型圈失效分析
Compression Set / 永 久 压 缩 变 形
Description / 描 述: The seal exhibits a flat-sided cross-section, the flat sides corresponding to the mating seal surfaces. / 密封件接触表面呈现平面永久变形。
Contributing Factors / 造 成 原 因: Sharp edges on glands or components/沟槽等部件边角锋利. Improper sizing of elastomer/密封件尺寸不适. Low-modulus/hardness elastomer/密封件硬度或弹性过低. Elastomer surface contamination/密封件表面有污物.
O-Ring Failures / O型圈失效分析
Extrusion / 挤 出
Description / 描 述: The seal develops ragged edges (generally on the low-pressure side) which appear tattered. / 密封件 有粗糙破烂的边缘，一般通常在压力低的一侧。 Contributing Factors / 造 成 原 因: Excessive clearances. Excessive pressure. Low-modulus/hardness elastomer. Excessive gland fill. Irregular clearance gaps. Sharp gland edges. Improper sizing. 间隙过大；压力过大；材料硬度或弹性太低；沟槽空间太小； 间隙尺寸不规则；沟槽边角过于锋利；密封件尺寸不合适。 Suggested Solutions / 解 决 方 法: Decrease clearances. Higher-modulus/hardnபைடு நூலகம்ss elastomer. Proper gland design. Use of polymer backup rings. / 降低间隙 尺寸，选用更高硬度或弹性的材料，沟槽设计更合理
Suggested Solutions: Correct installation procedures. Higher-modulus elastomer. Internally-lubed elastomers. Proper gland design. Gland surface finish. Possible use of polymer backup rings. /正确安装，选用高弹型材料， 选择可自润滑的材料，沟槽设计更合理，提高沟槽表面 光洁度，尽量使用支撑环。
O-Ring Failures / O型圈失效分析
Installation Damage / 安 装 损 伤
Description / 描 述: The seal or parts of the seal may exhibit small cuts, nicks or gashes. / 密封件部分或全部呈现整齐伤口。
Contributing Factors: Difficult or tight installation (static). Slow reciprocating speed. Low-modulus/hardness elastomer. Irregular O-ring surface finish (including excessive parting line). Excessive gland width. Irregular or rough gland surface finish. Inadequate lubrication./安装造成，运动速度太低，材料太硬或 弹性太小，O型圈表面处理不好，沟槽尺寸过宽，沟槽表面粗糙， 润滑不足。
O-Ring Failures / O型圈失效分析
Spiral Failure / 密 封 件 卷 曲
Description / 描 述: The seal exhibits cuts or marks which spiral around its circumference/密封件明显呈现卷曲情况.
O-Ring Failures / O型圈失效分析
Over-Compression / 过 度 压 缩
Description / 描 述: The seal exhibits parallel flat surfaces (corresponding to the contact areas) and may develop circumferential splits within the flattened surfaces/密封件接触表面呈 平面变形，并可能伴随裂纹. Contributing Factors / 造 成 原 因: Improper design—failure to account for thermal or chemical volume changes, or excessive compression. /设计不合理：没有考虑到材料由于热量及化学介质引起 的变形，或由于压力过大引起。 Suggested Solutions / 解 决 方 法: Gland design should take into account material responses to chemical and thermal environments. /沟槽的设计应考虑到材料由于温度及化学介质引起的变形。
O-Ring Failures / O型圈失效分析
Compression Set / 永 久 压 缩 变 形
Description / 描 述: The seal exhibits a flat-sided cross-section, the flat sides corresponding to the mating seal surfaces. / 密封件接触表面呈现平面永久变形。
Contributing Factors / 造 成 原 因: Sharp edges on glands or components/沟槽等部件边角锋利. Improper sizing of elastomer/密封件尺寸不适. Low-modulus/hardness elastomer/密封件硬度或弹性过低. Elastomer surface contamination/密封件表面有污物.
O-Ring Failures / O型圈失效分析
Extrusion / 挤 出
Description / 描 述: The seal develops ragged edges (generally on the low-pressure side) which appear tattered. / 密封件 有粗糙破烂的边缘，一般通常在压力低的一侧。 Contributing Factors / 造 成 原 因: Excessive clearances. Excessive pressure. Low-modulus/hardness elastomer. Excessive gland fill. Irregular clearance gaps. Sharp gland edges. Improper sizing. 间隙过大；压力过大；材料硬度或弹性太低；沟槽空间太小； 间隙尺寸不规则；沟槽边角过于锋利；密封件尺寸不合适。 Suggested Solutions / 解 决 方 法: Decrease clearances. Higher-modulus/hardnபைடு நூலகம்ss elastomer. Proper gland design. Use of polymer backup rings. / 降低间隙 尺寸，选用更高硬度或弹性的材料，沟槽设计更合理
Suggested Solutions: Correct installation procedures. Higher-modulus elastomer. Internally-lubed elastomers. Proper gland design. Gland surface finish. Possible use of polymer backup rings. /正确安装，选用高弹型材料， 选择可自润滑的材料，沟槽设计更合理，提高沟槽表面 光洁度，尽量使用支撑环。
O-Ring Failures / O型圈失效分析
Installation Damage / 安 装 损 伤
Description / 描 述: The seal or parts of the seal may exhibit small cuts, nicks or gashes. / 密封件部分或全部呈现整齐伤口。
Contributing Factors: Difficult or tight installation (static). Slow reciprocating speed. Low-modulus/hardness elastomer. Irregular O-ring surface finish (including excessive parting line). Excessive gland width. Irregular or rough gland surface finish. Inadequate lubrication./安装造成，运动速度太低，材料太硬或 弹性太小，O型圈表面处理不好，沟槽尺寸过宽，沟槽表面粗糙， 润滑不足。