摘要
目的研究某型装备用硅橡胶密封圈在温度影响下的性能退化规律,并进行寿命评估。方法采用热氧老化加速试验方法,试验过程中模拟橡胶密封圈径向承压状态,通过强化温度试验条件,在90、100、110、120℃条件下对硅橡胶密封圈进行加速老化试验。以压缩永久变形率作为参数,对试验后的性能检测数据进行分析与处理,结合Arrhenius模型,以硅橡胶(径压)密封圈压缩永久变形率分别达到10%、20%、30%、40%和50%为密封圈失效临界值指标,外推常温25℃时硅橡胶密封圈寿命。结果加速老化试验后,硅橡胶密封圈的压缩变形率逐渐下降,且温度越高,其压缩变形率下降越快。硅橡胶(径压)密封圈在25℃条件下,压缩永久变形率达到10%、20%、30%、40%和50%的贮存寿命分别为1、2.9、5.6、9.1、13.8 a。结论温度是造成硅橡胶密封圈性能退化的因素之一。文中的试验方法和数据处理方法能有效评估〇型密封圈的寿命。
This paper is to study the performance degradation law of silicone rubber seal ring for a certain type of equipment under the influence of temperature and evaluate its service life. The thermal oxygen aging accelerated test method is adopted to simulate the radial pressure bearing state of the rubber seal ring during the test. The accelerated aging test of the silicone rubber seal ring is carried out at 90, 100, 110 and 120 ℃ by strengthening the temperature test conditions. The performance test data after the test are analyzed and processed with the compression permanent deformation rate as the parameter, combined with the Arrhenius model. Taking the compression permanent deformation rate of silicone rubber(radial pressure) seal ring as 10%, 20%,30%, 40% and 50% respectively as the critical value index of seal ring failure, the service life of silicone rubber seal ring at 25 ℃ i s extrapolated. After the accelerated aging test, the compression deformation rate of silicone rubber seal ring decreases gradually, and the higher the temperature is, the faster the compression deformation rate decreases;at the same time, the storage life of silicone rubber(radial pressure) seal ring with compression permanent deformation rate of 10%, 20%, 30%, 40% and 50% at 25 ℃ i s 1, 2.9, 5.6, 9.1 and 13.8 years respectively. Temperature is one of the factors causing the performance degradation of silicone rubber seal ring;the test method and data processing method in this paper can effectively evaluate the service life of O-ring seal.
作者
蒲亚博
王艳艳
刘伟
赵方超
周彩元
PU Ya-bo;WANG Yan-yan;LIU Wei;ZHAO Fang-chao;ZHOU Cai-yuan(Southwest Technology and Engineering Research Institute,Chongqing 400039,China;Key Laboratory of Ammunition Storage Environmental Effects,China South Industries Group Co.,Ltd.,Chongqing 400039,China)
出处
《装备环境工程》
CAS
2022年第6期52-58,共7页
Equipment Environmental Engineering
关键词
橡胶密封圈
热氧老化试验
寿命评估
rubber seal ring
thermal oxygen aging test
life evaluation
