表面微观形貌对动压油膜厚度的影响  

Influence of Surface Microtopography on Dynamic Pressure Oil Film Thickness

作　　者：王晓岗 阿达依.谢尔亚孜旦 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《润滑与密封》2017年第11期84-89,共6页Lubrication Engineering

基　　金：新疆自治区自然科学基金项目(2014211A011)

摘　　要：采用实验与数值模拟相结合的方法,研究试件表面微观形貌对流体动压油膜厚度的影响。借助专门搭建的转子试验台,采用经过电化学光整加工的试件与普通磨削试件进行对比实验,利用光纤位移传感器测量两者在滑动轴承系统中形成的动压油膜厚度;利用流体动力学求解工具Fluent对两试件形成的承载压力进行模拟并对数据进行相关分析。结果表明:经电化学光整加工在试件表面塑造出的随机分布的"圆弧"状凸起的微观形貌,可形成厚度更高的动压油膜;大量随机分布的"圆弧"状微造型结构可产生更大的承载压力;油膜厚度最大位置与最小位置不受转速影响。The effect of surface microstructure of specimen on hydrodynamic pressure oil film thickness was studied by adopting the combination of experimental method and numerical simulation method.With the aid of a specially constructed rotor test rig, a contrast experiment was conducted for the specimen with electrochemical finishing process and the ordinary grinding specimen, and the dynamic pressure oil film thickness formed on both of the test specimens in sliding bearing sys- tem was measured by applying the optical fiber displacement sensor.The oil film pressure of the test specimens was simulated by adopting the fluid dynamic solution tool of Fluent and the related data were analyzed.Results show that a dynamic pressure oil film with a higher thickness can be formed on the ＂arc＂ shaped embossment microstructure which is mold on the surface of test specimen after electrochemical machining, and greater oil film pressure can be generated by a large num- ber of random distributed ＂are ＂ shaped micro modelling structure.The rotate speed has no influence on the maximum and minimum location of oil film thickness.

关 键 词：电化学光整加工 微观形貌 油膜厚度 动压油膜 

分 类 号：TH117.2[机械工程—机械设计及理论]