全氟醚橡胶密封材料的密封性能研究  

Research on Sealing Performance of the Perfluoroether Rubber Sealing Material

作　　者：梁鼒 刘小艳[1] 张继华[1] 王昊[1] 吴福迪[1] LIANG Zi;LIU Xiaoyan;ZHANG Jihua;WANG Hao;WU Fudi(Aerospace Research Institute of Material&Processing Technology,Beijing 100076)

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2025年第1期81-86,共6页Aerospace Materials & Technology

基　　金：国家自然科学基金(No.21991124)。

摘　　要：全氟醚橡胶具有优异的耐高低温、耐特殊介质等性能,全氟醚橡胶密封材料在径向密封中应用时,使用7804号润滑脂作为润滑剂。本文研究了全氟醚橡胶密封材料在径向密封中的密封性能。结果表明,全氟醚橡胶密封材料具有较低的气体漏率,润滑剂涂抹在全氟醚橡胶密封材料表面一段时间后,产生的小颗粒粉末在橡胶表面形成微通道,导致使用氦质谱检漏法测试的气体漏率增加,使用液体氟醚生胶作为润滑剂能降低气体漏率;涂抹7804号润滑脂后,全氟醚橡胶密封材料在氧化剂及燃烧剂介质环境中的气体漏率远低于氦气环境下的气体漏率,说明在介质环境中可使用7804号润滑脂作为全氟醚橡胶密封材料的润滑剂。The perfluoroether rubber had excellent properties of resistance of high and low temperature as well as special medium.The 7804 grease was used as lubricant of perfluoroether rubber sealing material when applied in radial sealing.In this paper,the sealing performance of perfluoroether rubber sealing material in radial sealing was studied.The results show that perfluoroether rubber seal has low gas leakage rate.After 7804 grease coated on perfluoroether rubber sealing material for a period of time,some small particles from grease is generated,which can form micro-channel on the surface of rubber,results an increase on the leakage rate when tested by helium mass spectrometer leak detector.The use of liquid fluoroether raw rubber as lubricant can reduce the leakage rate effectively.The gas leakage rate of perfluoroether rubber sealing material coated with 7804 grease in oxidant and combustion agent medium is much lower than that in helium environment,which means that 7804 grease can be used as the lubricant of perfluoroether rubber sealing material in special medium environment.

关 键 词：全氟醚橡胶 润滑剂 气体漏率 介质环境 

分 类 号：TQ336.8[化学工程—橡胶工业]