微尺度下液体静压轴承性能研究  

The Analysis of Hydrostatic Bearing in Micro-scale Flow

作　　者：边艳华 陈东菊[1] 范晋伟[1] 

机构地区：[1]北京工业大学机电学院,北京100124

出　　处：《润滑与密封》2014年第6期28-34,共7页Lubrication Engineering

基　　金：教育部博士点学科专项科研基金项目(3C001011201201);国家自然科学基金项目(51105005)

摘　　要：针对液体静压轴承油膜缝隙流动所出现的微尺度效应,采用计算流体力学的分析方法,应用Navier速度滑移模型,将近壁面速度滑移边界条件引入到油膜二维流动,推导出适合流体二维流动的N-S方程,并对轴承承载力和刚度进行分析。结果表明,微尺度下速度滑移对轴承的承载力和刚度造成了极大的影响,滑移长度增加时,轴承的最大承载能力将严重减小,油膜刚度将会增加;滑移的发生导致最优的油膜厚度变小。For the micro-scale effect of near surface velocity slip on liquid hydrostatic bearing oil film gap flow in two-dimension,computational fluid dynamic method was applied to investigate the effects of velocity slip on bearing capacity and stiffness. By adopted defi-nite velocity slip boundary condition into Navier-Stokes equation, the Reynolds equation suitable for liquid in two-dimensional flow in themicro scale condition was deduced. Numerical simulation results show that bearing capacity and stiffness are largely changed under theeffect of velocity slip. With the increase of slip length, the maximum bearing capacity is reduced seriously and stiffness is increased.When considering the slip in oil film flow, the optimal value of oil film thickness is decreased.

关 键 词：液体静压径向轴承 微尺度 速度滑移 承载力 刚度 

分 类 号：TH133.3[机械工程—机械制造及自动化]