Experimental study on the failure factors of the O-ring for long-term working  

作　　者：孙远韬 ZHANG Min YUAN Lindong SUN Yuantao(School of Mechanical Engineering,Tongji University,Shanghai 200092,P.R.China)

机构地区：[1]School of Mechanical Engineering,Tongji University,Shanghai 200092,P.R.China [2]Metering Department,Shanghai,Fiorenti Gas Equipment CO,.LTD,Shanghai 201201,P.R.China

出　　处：《High Technology Letters》2023年第3期231-246,共16页高技术通讯（英文版）

基　　金：Supported by the National Key Research and Development Program of China(No.2018YFC0808902).

摘　　要：The O-ring in the rotary dynamic sealing system of gas meters should have outstanding long-term sealing performance under the conditions of high and low temperature,which can ensure the safety of gas meters.In this paper,based on the O-ring sealing mechanism,taking the compression set as the main sealing index,a finite element simulation method is used to analyze the failure charac-teristics under different conditions according to the constitutive relation of nitrile rubber.Then,using the orthogonal test method for the O-ring sealing performance index,the main factors which affect the law of long-term test are analysed,and the orthogonal regression mathematical model that can predict the compression set is obtained.Finally,the O-ring is improved according to the model,and the test results show that the performance of the new O-rings with high and low temperature resistance is greatly improved and meets the expected target requirements.

关 键 词：NBR O-ring compression set rotary dynamic seal orthogonal test regression analysis 

分 类 号：TH136[机械工程—机械制造及自动化]