受感组件密封失效分析及改进
Sealing Failure Analysis and Improvement of Sensing Component
孙福利 1王文伟 1陈小军1
作者信息
- 1. 太原航空仪表有限公司,太原 030006
- 折叠
摘要
受感组件在压力信号器高低温试验后出现密封失效.通过故障模式分析、仿真计算和试验等方法,探究受感组件密封失效的原因,并进行改进.结果表明,螺纹预紧力衰减是导致受感组件密封失效的直接原因.由于受感组件壳体材料硬度不足,在试验中发生微观屈服变形,使螺纹无法有效配合而导致预紧力衰减,同时壳体与盖体积相对变化量不一致,加剧受感组件在试验中的预紧力衰减.改进壳体材料后,有效缓解受感组件的预紧力衰减,解决该型受感组件密封失效的问题.
Abstract
Sealing failure occurred to the sensing component after the high and low temperature test of a pressure annunciator.Through failure modes analysis,simulation calculation and test,the sealing failure cause of the sensing component was explored and improvement was carried out.The results show that the attenuation of thread preload is the direct cause of the sealing failure of the sensing component.Due to the lower hardness of the shell material of the sensing component,micro-yield deformation occurred in the test,which made the thread unable to match effectively,resulting in the attenuation of the preload.Meanwhile,the difference of the relative variation of volume between the shell and the cover further boosted the attenuation of the preload of the sensing component in the test.Through improving the shell material,the attenuation of the preload of the sensing component has been effectively alleviated,and the sealing failure of this type of sensing components has been solved.
关键词
受感组件/故障模式/密封失效/预紧力/材料改进Key words
sensing component/failure modes/sealing failure/preload/material improvement引用本文复制引用
出版年
2024
NETL
NSTL
万方数据