摩擦表面包覆聚四氯乙烯的油封陈宜甲油封结构设计确定后，其唇部与密封轴的接触区工作温度是影响其使用寿命的重要因素之一。油封在工作过程中（见图１），因唇部与轴接触区的抱紧力而产生密封作用，而该抱紧力又引起摩擦、温升。温度如果过高，将导致唇口的过早老化、烧... Frictional surface coated with polytetrafluoroethylene seal Chen Yijia oil seal structure design is determined, the contact area of ​​the lip and the seal shaft temperature is one of the important factors affecting the service life. Oil seal in the course of work (see Figure 1), due to lip and shaft contact area of ​​the tight seal and the sealing effect, which in turn causes friction friction, temperature rise. If the temperature is too high, it will lead to premature aging of the lip, burn ...