湿式离合器液压缸活塞密封圈改进设计及仿真分析

O形密封圈具有结构紧凑、便于安装等优势,被广泛的应用于湿式离合器。工作过程中,作动部件由静止开始做变速运动,受动静摩擦力共同作用,而关于该过程研究较少。按照国家标准对湿式离合器液压缸活塞密封圈进行设计,通过workbench建立密封圈模型,根据密封圈接触应力及等效应力云图对密封圈、活塞沟槽尺寸及材料硬度进行优化仿真。由仿真分析可知,优化后密封圈及沟槽结构尺寸更加合理,且密封圈材料IRHD硬度应在70~80之间选取。同时获得液压缸运动过程中密封圈动静摩擦力变化曲线,该曲线为湿式离合器响应时间及控制策略研究奠定了基础。

Improvement Design and Simulation Analysis of Piston Sealing Ring for Wet Clutch Hydraulic Cylinder

O-ring is widely used in wet clutch because of its compact structure and easy installation. In the working process,the actuator starts to change speed from static,and the static and dynamic friction forces act together,but there is little research on this process. According to the national standard,the seal ring of wet clutch hydraulic cylinder piston is designed,and the seal ring model is established by workbench.According to the contact stress and equivalent stress nephogram of seal ring,the size of seal ring,piston groove and material hardness are optimized and simulated. According to the simulation analysis,the optimized seal ring and groove structure size is more reasonable,and the IRHD hardness of seal ring material should be between 70 ~ 80. At the same time,the dynamic and static friction curve of seal ring in the process of hydraulic cylinder movement is obtained,which lays a foundation for the research of response time and control strategy of wet clutch.