【摘要】 车辆制动分泵中的橡胶密封圈在制动和释放过程中的受力变化特性影响车辆的制动性能。通过对密封槽和橡胶密封圈尺寸特性的分析,试验测试活塞与密封圈之间动静摩擦过程的受力特征;通过试验合理确定各仿真参数,建立密封橡胶圈基于Yeoh超弹性模型,分别分析在预压紧状态、制动状态和制动释放状态下,矩形橡胶密封圈的应力和应变的特性;分析制动分泵中矩形橡胶密封圈、密封槽结构,以及制动摩擦材料相关特性对制动的影响,并给出制动释放时橡胶圈回复力大小的理论计算公式。结果表明:盘式制动器在制动过程中,活塞的实际移动距离很小;在制动力释放时,制动盘与摩擦材料的分离间隙很小,制动盘和摩擦材料会处于轻微的接触状态;密封槽采用斜面结构可以即保证较好的密封效果,又可以减少橡胶圈的内应力。更多还原

【Abstract】 The force of the rubber sealing ring in the brake and release of the brake cylinder affects the braking performance of the vehicle. Through the measurement of the size of sealing groove and rubber sealing ring,the force of dynamic and static friction process between the piston and the sealing ring was tested. Based on the Yeoh hyperelastic model,the stress and strain characteristics of the rubber sealing ring under preloading state,braking state and brake release state were analyzed by reasonable determination of the simulation parameters. The influence of the relevant characteristics of the rectangular rubber sealing ring of sealing groove structure in the brake cylinder,and the brake friction material were discussed and analyzed. The results show that during the braking process,the actual displacement of the piston is very small. When the brake is released,the separation gap between the brake disc and the friction material is very small,and the disc and the friction material will be in a slight contact state. The inclined groove structure can ensure good sealing effect and reduce the inner stress of rubber ring.更多还原