密封性检测技术
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Leak Testing 密封性检测技术
2009.04.22
为什么要进行泄漏测试? 为什么要进行泄漏测试?
安全 客户满意度 增加利润
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
这些方法对密封性测试都很有效。 没有一种方法对所有的应用而言是最好的。 他们都有各自优点和缺点，应用那种方法合适取决于被测零件、 工艺要求和技术要求。 你需要和一个能够全面应用这些技术的公司合作。 泄漏测试系统应根据具体应用设计，要考虑：测试容积、泄漏 率、测试压力、测试节拍、以及工艺上为何要求要进行密封性 测试。
典型的汽车零部件
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
假设我们做个泄漏测试，测漏仪显示的结果是10 假设我们做个泄漏测试，测漏仪显示的结果是10 CC/Min. 泄漏有可能来自一个10 CC/Min漏孔 或者两个5 泄漏有可能来自一个10 CC/Min漏孔 或者两个5 CC/Min 的漏空， 或者10个 CC/Min的漏空。 或者10个1 CC/Min的漏空。
空气和液体试漏的对比
很多汽车零部件都是依靠液体来运行，问题是我们为什么 不以液体为介质进行密封性测试呢？ 我们可以对比一下一空气和液体作为介质进行密封性检测 的优缺点。空气有可压缩性，且黏度相对较低。这意味着 空气通过漏点的速度比液体的要快100-400倍。 空气通过漏点的速度比液体的要快100-400倍。 空气本质上没有表面张力。这个特点使它比液体更容易通 过小的漏点。 然而, 然而, 也必须考虑到空气可以通过的泄漏，对液体而言可能 并不一定会泄漏。这就是为什么以空气作为介质进行试漏 的时候要定义一个最大允许空气泄漏量。 以空气为介质进行试漏的最大优点就是速度快。
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
什么是泄漏
当我们试图回答什么是泄漏的时候，我门需要知道零件的材质 是什么。是铝的、铸铁的还是塑料的。 通常我们会认为泄漏是由零件上仅有的一个圆洞引起的。但这 不是事实。 如果我们观察泄漏的截面，我们会看到泄漏是有很多漏点造成 的。 有时是由零件或铸件上的裂纹造成的。但大多数情况下是细小 的砂眼造成的。
为何要密封测试
铸件孔洞 零件有裂纹或缺陷 装配是否恰当（空调装配） 装配的完整性（散热器、中冷器、油冷器） 密封件缺失 密封件损坏 管件或盖子缺失 内漏, 内漏, 腔体间互漏 总装纠错
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
如何进行密封测试
最简单的方法之一就是把零部件投入水中，加压，观察气泡。 这个方法的问题是我们无法知道被测零件的泄漏量。 最先进的泄漏测试方法就是应用电子测漏仪器。 一些最常用的测试方法是： 压降法（直压法） 压差法 大流量法
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
关于无泄漏技术要求
Hale Waihona Puke Baidu
有时设计工程师很容易会讲：“零件应该无泄漏” 然而, 有时设计工程师很容易会讲：“零件应该无泄漏” 。然而, 这就像要求没有尺寸公差一样，没有一点偏差！ 例如: 10mm 例如: 10mm + 0 = 10.0000000000000………… 10.0000000000000………… 世界上“无泄漏” 世界上“无泄漏”的概念是不存在的。
空气
液体
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
所有的东西都有泄漏
每个零件都有一定数量的空气泄漏点。当我们说零件无液体 泄漏时，我们就可以据此定义一个空气泄漏率。 然而， 因为我们以空气为介质测试大部分的零配件，以保证 无液体泄漏，因此不能定义这些零件不漏空气或其他气体。 最大泄漏值通常表示为在一定测试压力下泄漏率为多少cc/min。 最大泄漏值通常表示为在一定测试压力下泄漏率为多少cc/min。
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
什么是泄漏测试
泄漏测试是生产工艺必需的要求。 泄漏测试是为了保证零部件或零部件的某个部位或零部件装配 后无泄漏。 进行泄漏测试的两个重要原因是：保障安全和质量。 质量: 质量: 保障产品质量，防止故障，减少生产差错导致的高成本 和客户的不满。 安全: 安全: 保证产品满足关于泄漏的工艺要求。如燃油系统和刹车 系统。
Leak Testing 密封性检测技术
2009.04.22
为什么要进行泄漏测试? 为什么要进行泄漏测试?
安全 客户满意度 增加利润
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
这些方法对密封性测试都很有效。 没有一种方法对所有的应用而言是最好的。 他们都有各自优点和缺点，应用那种方法合适取决于被测零件、 工艺要求和技术要求。 你需要和一个能够全面应用这些技术的公司合作。 泄漏测试系统应根据具体应用设计，要考虑：测试容积、泄漏 率、测试压力、测试节拍、以及工艺上为何要求要进行密封性 测试。
典型的汽车零部件
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
假设我们做个泄漏测试，测漏仪显示的结果是10 假设我们做个泄漏测试，测漏仪显示的结果是10 CC/Min. 泄漏有可能来自一个10 CC/Min漏孔 或者两个5 泄漏有可能来自一个10 CC/Min漏孔 或者两个5 CC/Min 的漏空， 或者10个 CC/Min的漏空。 或者10个1 CC/Min的漏空。
空气和液体试漏的对比
很多汽车零部件都是依靠液体来运行，问题是我们为什么 不以液体为介质进行密封性测试呢？ 我们可以对比一下一空气和液体作为介质进行密封性检测 的优缺点。空气有可压缩性，且黏度相对较低。这意味着 空气通过漏点的速度比液体的要快100-400倍。 空气通过漏点的速度比液体的要快100-400倍。 空气本质上没有表面张力。这个特点使它比液体更容易通 过小的漏点。 然而, 然而, 也必须考虑到空气可以通过的泄漏，对液体而言可能 并不一定会泄漏。这就是为什么以空气作为介质进行试漏 的时候要定义一个最大允许空气泄漏量。 以空气为介质进行试漏的最大优点就是速度快。
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
什么是泄漏
当我们试图回答什么是泄漏的时候，我门需要知道零件的材质 是什么。是铝的、铸铁的还是塑料的。 通常我们会认为泄漏是由零件上仅有的一个圆洞引起的。但这 不是事实。 如果我们观察泄漏的截面，我们会看到泄漏是有很多漏点造成 的。 有时是由零件或铸件上的裂纹造成的。但大多数情况下是细小 的砂眼造成的。
为何要密封测试
铸件孔洞 零件有裂纹或缺陷 装配是否恰当（空调装配） 装配的完整性（散热器、中冷器、油冷器） 密封件缺失 密封件损坏 管件或盖子缺失 内漏, 内漏, 腔体间互漏 总装纠错
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
如何进行密封测试
最简单的方法之一就是把零部件投入水中，加压，观察气泡。 这个方法的问题是我们无法知道被测零件的泄漏量。 最先进的泄漏测试方法就是应用电子测漏仪器。 一些最常用的测试方法是： 压降法（直压法） 压差法 大流量法
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
关于无泄漏技术要求
Hale Waihona Puke Baidu
有时设计工程师很容易会讲：“零件应该无泄漏” 然而, 有时设计工程师很容易会讲：“零件应该无泄漏” 。然而, 这就像要求没有尺寸公差一样，没有一点偏差！ 例如: 10mm 例如: 10mm + 0 = 10.0000000000000………… 10.0000000000000………… 世界上“无泄漏” 世界上“无泄漏”的概念是不存在的。
空气
液体
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
所有的东西都有泄漏
每个零件都有一定数量的空气泄漏点。当我们说零件无液体 泄漏时，我们就可以据此定义一个空气泄漏率。 然而， 因为我们以空气为介质测试大部分的零配件，以保证 无液体泄漏，因此不能定义这些零件不漏空气或其他气体。 最大泄漏值通常表示为在一定测试压力下泄漏率为多少cc/min。 最大泄漏值通常表示为在一定测试压力下泄漏率为多少cc/min。
The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental design registration.
什么是泄漏测试
泄漏测试是生产工艺必需的要求。 泄漏测试是为了保证零部件或零部件的某个部位或零部件装配 后无泄漏。 进行泄漏测试的两个重要原因是：保障安全和质量。 质量: 质量: 保障产品质量，防止故障，减少生产差错导致的高成本 和客户的不满。 安全: 安全: 保证产品满足关于泄漏的工艺要求。如燃油系统和刹车 系统。