基于叶顶曲率半径变化的变量叶片泵叶片-定子副润滑数值分析  

Lubrication Analysis of Vane-stator Pair in a Variable Vane Pump Based on Different Apical Radius of Vane

作　　者：张国涛[1] 尹延国[1] 

机构地区：[1]合肥工业大学,合肥230009

出　　处：《中国机械工程》2015年第18期2481-2485,2490,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50975072);安徽省科技攻关计划项目(1501021006)

摘　　要：针对叶片泵叶片-定子副在预卸压区中易发生对偶面间直接接触而加剧磨损的状况,通过分析叶片-定子副在预卸压区中的润滑状态,建立了叶片-定子副的弹流动压润滑模型,并数值模拟了接触区内压力分布,结合叶顶曲率半径和叶顶承载面积的变化对叶片-定子副间力学特性的影响,分析了叶顶曲率半径和叶顶承载面积的变化对动压油膜润滑性能的影响。结果表明:叶片-定子副处于预卸压区末端时润滑状况最差;承载面积的变化对叶顶载荷和润滑性能的影响不容忽视;增大叶顶半径后能改善摩擦副的润滑状态,许可范围内随叶顶曲率半径增大,接触区内油膜压力分布更趋均匀,叶片-定子副间的润滑状况也更加稳定可靠。Aiming at the direct contact between vane and stator in pre-lower pressure area which will aggravate the wear conditions,lubricating state and elastohydrodynamic lubrication model of vane- stator pair in vane pump were discussed. Then pressure distribution in contact area was studied by nu- merical simulation. Through analysing the effects of apical radius and bearing area of vane on mechan- ics property,the influences of them on the hydrodynamic lubrication performance of vane-stator pair were investigated. Results show that poor lubrication performance occure near the end of pre unloading zone. The effects of the change of bearing area on mechanics and lubrication performance can not be ig- nored. Increase of the apical radius can improve the lubrication condition and lead the distribute of pressure more uniformity. Therefore the lubricating condition is more stable and reliable.

关 键 词：变量叶片泵 叶片定子副 叶顶曲率半径 润滑特性 数值分析 

分 类 号：TH324[机械工程—机械制造及自动化]