油膜破裂条件下柱塞泵配流副摩擦磨损性能研究  

Friction and Wear Properties of Valve Pair of Piston Pump Under Oil Film Fracture Conditions

作　　者：何恒索 吴怀超[1] 曹刚 HE Heng-suo;WU Huai-chao;CAO Gang(School of Mechanical Engineer,Guizhou University,Guizhou Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025

出　　处：《机械设计与制造》2024年第2期266-270,275,共6页Machinery Design & Manufacture

基　　金：贵州省科技创新人才团队项目(黔科合平台人才[2020]5020);贵州省高层次创新型人才培养计划项目(黔科合平台人才[2016]5659)。

摘　　要：为了探究轴向柱塞泵配流副工作过程中油膜破裂时,配流副接触情况和磨损。根据配流副在实际工况建立了配流盘与缸体摩擦副的流-热-力耦合模型和基于退化系数的磨损预测模型。分析边界润滑条件(油膜破裂)下配流副温升、应力、应变及磨损。并分析了温升对应力、应变和磨损的影响。研究结果表明:配流副接触面应力、应变随油液压力呈周期性变化。油膜破裂情况下,缸体旋转360°最大温升为30.560℃。配流盘的最大应力为90.046MPa,相较于不考虑温升应力增大了21.310MPa。且配流盘应力分层,使得配流盘变形分化,变形主要发生在配流盘排油区外密封带。通过磨损模型分析,油膜破裂下缸体旋转360°磨损量为0.0033mg,相较于不考虑温升磨损增加了0.0009mg,说明温度会加剧磨损。In order to explore the contact condition and wear of the valve pair when the oil film ruptures during the operation of the valve pair of the axial piston pump.According to the valve pair in the actual working conditions,a flow-thermal-mechanical coupling model of the valve plate and the cylinder block friction pair and a wear prediction model based on the degradation coefficient are established.Analyze the temperature rise,stress,strain and wear of the distribution pair under boundary conditions(oil film rupture).The influence of temperature rise on stress,strain and wear is also analyzed.The research results show that the stress and strain of the valve pair change periodically with the pressure of the plunger cavity.In the case of oil film rupture,the maximum temperature rise of the cylinder rotating 360°is 30.560°C.The maximum stress of the valve plate is 90.046MPa,which is an increase of 21.310MPa compared with the stress without considering the temperature rise.Moreover,the stress stratification of the valve plate is significant,which causes the deformation and differentiation of the valve plate.The deformation mainly occurs in the sealing zone outside the oil discharge area of the valve plate.Through the analysis of the wear model,the 360°wear of the cylinder under oil film rupture is 0.0033mg,which is 0.0009mg more than the wear without considering the temperature rise,indicating that the temperature will increase the wear.

关 键 词：高压轴向柱塞泵 边界润滑 流-热-力耦合 退化系数 磨损预测 

分 类 号：TH16[机械工程—机械制造及自动化] U463.22[机械工程—车辆工程]