针对普通橡胶因磨损严重不适用于中、高压或真空密封的问题,采用纳米锶铁氧体磁性丁腈橡胶复合材料设计密封,研究不同后唇角与密封唇口最大接触应力的关系。仿真和试验结果表明,后唇角对油封的稳定性起着重要的作用,当系统压力较大时,后唇角宜取较小的值,系统压力较低时,后唇角可以适当取大点。 Aiming at the problem that ordinary rubber is not suitable for medium, high pressure or vacuum sealing due to serious wear, the relationship between the different rear lip angle and the maximum contact stress of seal lip is studied by using the nano-strontium ferrite magnetic nitrile rubber composite material. The simulation and experimental results show that the posterior lip plays an important role in the stability of the oil seal. When the system pressure is high, the posterior lip should be smaller, and when the system pressure is lower, the posterior lip may be appropriately larger point.