表面织构对水润滑轴承混合润滑性能的影响  

The Influence of Surface Texture on Mixed Lubrication Performance of Water-lubricated Bearing

作　　者：路继松 宋新涛 王晓力[1] LU Jisong;SONG Xintao;WANG Xiaoli(Department of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机械与车辆学院

出　　处：《润滑与密封》2019年第11期29-33,共5页Lubrication Engineering

基　　金：国家自然科学基金项目(51735001;11472046)

摘　　要：为分析表面织构对水润滑轴承混合润滑性能的影响,基于平均Reynolds方程及JFO空化边界条件建立带有表面织构的水润滑轴承混合润滑模型并数值求解,获得不同织构参数下水润滑轴承的Stribeck曲线。研究结果表明:表面织构是否能改善润滑性能与其深径比及面密度参数密切相关,织构的引入并不一定能降低水润滑轴承的摩擦因数;表面织构的面密度和深径比存在最优值,能使水润滑轴承获得最大的膜厚比与最小的摩擦因数,并在较低的转速下由混合润滑状态进入流体动压润滑状态。In order to analyze the effects of surface texture on mixed lubrication performance of water-lubricated bearings,a mixed lubrication model with surface texture under JFO cavitation boundary conditions was established based on the averaged Reynolds equation and then it was solved numerically.The Stribeck curves of water-lubricated bearings with different texture parameters were plotted.The results show that whether surface texture can improve the lubrication performance is closely related to the depth-diameter ratio and surface density parameters,and the introduction of texture does not necessarily reduce the friction coefficient of water-lubricated bearings.There is an optimum value of the surface density and the ratio of depth to diameter of the surface texture,which can produce the maximum film thickness ratio and the minimum friction coefficient of the water-lubricated bearing,and ensure the bearing to enter the hydrodynamic lubrication state from the mixed lubrication state at a lower speed.

关 键 词：水润滑轴承 表面织构 混合润滑 JFO空化边界条件 STRIBECK曲线 

分 类 号：TH117.2[机械工程—机械设计及理论]