密封面磨损对V形组合密封圈性能的影响  

Effect of sealing surface wear on the performance of V-shaped combined sealing ring

作　　者：张毅[1] 熊思阳 钟思鹏 熊子杰 杨强 ZHANG Yi;XIONG Siyang;ZHONG Sipeng;XIONG Zijie;YANG Qiang(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《工程设计学报》2023年第2期237-243,共7页Chinese Journal of Engineering Design

基　　金：四川省自然科学基金资助项目(2022NSFSC0276)。

摘　　要：密封面磨损对V形组合密封圈的密封性能有显著影响。建立了V形组合密封圈的有限元模型,基于V形圈接触压力大的地方磨损较快且磨损较大的区域向空气侧移动的特点,在有限元仿真计算中通过修改V形圈的轮廓来表示V形组合密封圈不同的磨损状态,进而研究密封圈在不同磨损状态下的接触压力分布情况。考虑到V形组合密封圈变形与润滑油膜之间的耦合作用,基于弹性流体动压润滑理论,建立了V形组合密封圈弹流润滑数学模型。基于小变形理论,通过变形影响系数矩阵法得到V形组合密封圈在高压作用下的弹性变形,通过有限差分法求解了密封圈在工作过程中的油膜压力分布和厚度分布,分析了密封面磨损和粗糙度对组合密封圈润滑性能的影响。搭建了V形组合密封圈性能实验台,得到了在轻度和中度磨损状态下密封圈在不同电机转速下的摩擦扭矩和泄漏率,并将实验结果与仿真结果进行对比。结果表明:随着磨损加剧,靠近润滑油一侧油膜的压力和厚度增大;对于已经发生磨损的密封圈,粗糙度的提高会使其油膜压力增大;转速提高会使密封圈所受的摩擦扭矩和泄漏率增大。研究结果为提高V形组合密封圈的性能提供了参考。The wear of the sealing surface has a significant impact on the sealing performance of Vshaped combined sealing ring.A finite element model of the V-shaped combined sealing ring was established.Based on the characteristics of rapid wear in areas with high contact pressure and the movement of the area with greater wear towards the air side,the contact pressure distribution of the sealing ring under different wear states was studied by modifying the contour of the V-shaped ring in the finite element simulation process to represent the different wear states of the V-shaped combined seal.Considering the coupling effect between deformation of V-shaped combined sealing ring and lubricating oil film,based on the elastohydrodynamic lubrication theory,an elastohydrodynamic lubrication mathematical model for V-shaped combined sealing ring was established.Based on the small deformation theory,the elastic deformation of the sealing ring under high pressure was obtained by the deformation influence coefficient matrix method.The oil film pressure distribution and thickness distribution in the working process of the sealing ring were solved by the finite difference method,and the influence of the wear and roughness of the sealing surface on the lubrication performance of the combined sealing ring was analyzed.A V-shaped combined sealing ring performance test bench was built to obtain the friction torque and leakage rate of the sealing ring under mild and moderate wear conditions at different motor speeds,and the test results were compared with the simulation results.The results showed that as wear intensified,the pressure and thickness of the oil film near the lubricating oil side increased;for seals that had already undergone wear,an increase in roughness would increase the oil film pressure;an increase in motor speed would increase the frictional torque and leakage rate of the sealing ring.The research results provide a reference for improving the performance of V-shaped combined sealing ring.

关 键 词：弹流润滑模型 磨损 粗糙度 旋转密封圈 

分 类 号：TQ336.42[化学工程—橡胶工业]