武汉工程大学学报2017，Vol.39Issue(5)：503-507,5.DOI:10.3969/j.issn.1674-2869.2017.05.017
高温振动下聚四氟乙烯垫片的松弛与泄漏测试
Relaxation and Leakage Test of PTFE Gasket under High Temperature Vibration
摘要
Abstract
The testing system of sealing performance for high-temperature gasket was designed. The stress relaxation and sealing performance of polytetrafluoroethylene (PTFE) gasket under small-amplitude deformation-controlled vibration and static stress relaxation at 100℃ were investigated. The effects of maximum compression on the dynamic stress relaxation and leakage behavior of PTFE were studied. The static stress relaxation and sealing performance of PTFE gasket at load ratio of 0.99 and the maximum compression of 0.3 mm, 0.4 mm and 0.5 mm were further researched. Results show that the dynamic stress relaxation rate of PTFE increases with the maximum compression rising and the static stress relaxation rate of PTFE reduces slowly with the increase of the maximum compression deformation at 100 ℃. Moreover, the stress decreases rapidly during the initial 20 s in both dynamic and static tests, which shows a remarkable effect of the stress relaxation, especially in the dynamic stress relaxation experiment. The differential pressure of dynamic test is about 1.1 times that of static test.关键词
聚四氟乙烯垫片/密封性能/高温/小幅振动Key words
polytetrafluoroethylene gaskets/sealing performance/high temperature/small-amplitude vibration分类
化学化工引用本文复制引用
戴文超,郑小涛,文翔,喻九阳,徐建民..高温振动下聚四氟乙烯垫片的松弛与泄漏测试[J].武汉工程大学学报,2017,39(5):503-507,5.基金项目
湖北省教育厅科学研究计划重点项目(D20161508) （D20161508）
