在高压气体介质长期作用过程中,橡胶密封件丧失密封能力。对橡胶零件密封性能有影响的因素很多,研究这些条件下的密封机理比较困难。密封件的密封能力主要取决于材料对偶合表面的微不平度的填充能力~((1,p·7))。由于橡胶对微不平度的填充程度难以测定,所以密封件的工作能力主要由橡胶—金属界面产生的接触应力来评价,但接触应力并不能 In the long-term role of high-pressure gas medium process, the rubber seal loss of sealing ability. There are many factors that affect the sealing performance of rubber parts. It is difficult to study the sealing mechanism under these conditions. The sealing ability of the seal mainly depends on the micro-roughness filling capacity of the coupling surface (~ ((1, p · 7)). Since the degree of filling of the rubber with respect to the micro unevenness is difficult to measure, the working ability of the seal is mainly evaluated by the contact stress generated by the rubber-metal interface, but the contact stress does not