基于ABAQUS的近无泄漏立式柱塞泵橡胶套密封性能仿真研究

Simulation Study on Sealing Performance of Rubber Sleeve of Near Leak Free Vertical Piston Pump Based on ABAQUS Software

基于一种新型近无泄漏立式柱塞泵,运用ABAQUS建立立式柱塞泵橡胶密封腔的有限元模型,仿真模拟了立式柱塞泵的工作过程。首先分析橡胶套在自然状态和最大行程状态下的Von Mises应力、剪切应力,推测橡胶套在工作过程中因应力松弛导致失效的部位。根据橡胶密封构件的Mises屈服准则和Tresca最大切应力准则判断应力最大处是否会造成密封构件失效;然后分析了流体压力和摩擦系数对该橡胶套密封性能的影响,结果表明:流体压力和摩擦系数的增加会增大橡胶套的最大Von Mises应力和最大接触压力,进而导致橡胶套过早发生失效的情况。在近无泄漏立式柱塞泵的结构设计中应考虑流体压力和摩擦系数对密封套密封性能的影响。

Based on a new type of nearly leak-free vertical piston pump,the finite element model of rubber sealing chamber of the vertical piston pump was established by ABAQUS,and the working process of the vertical piston pump was simulated.Firstly,the Von Mises stress and shear stress of the rubber sleeve under natural state and maximum stroke state were analyzed,and the failure location of the rubber sleeve due to stress relaxation during operation was speculated.Mises yield criterion and Tresca maximum shear stress criterion of rubber seal members were used to judge whether the maximum stress would cause the failure of seal members.Then the effects of fluid pressure and friction coefficient on the sealing performance of the rubber sleeve were analyzed.The results showed that the increase of fluid pressure and friction coefficient would increase the maximum Von Mises stress and maximum contact pressure of the rubber sleeve,which would lead to premature failure of the rubber sleeve.The influence of fluid pressure and friction coefficient on the sealing performance of sealing sleeve should be considered in the structural design of near-leak-free vertical piston pump.