文章摘要
边艳华,陈东菊,范晋伟.微尺度下液体静压轴承性能研究[J].润滑与密封,2014,39(6):28-34
微尺度下液体静压轴承性能研究
  
DOI:10.3969/j.issn.0254-0150.2014.06.006
中文关键词: 液体静压径向轴承  微尺度  速度滑移  承载力  刚度
英文关键词: hydrostatic bearing  micro scale  velocity slip  bearing capacity  stiffness
基金项目:教育部博士点学科专项科研基金项目(3C001011201201);〖JP〗国家自然科学基金项目(51105005).
作者单位E-mail
边艳华 北京工业大学 yanhuazaitangshan@163.com 
陈东菊 北京工业大学  
范晋伟 北京工业大学  
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中文摘要:
      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。
英文摘要:
      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 definite velocity slip boundary condition into Navier Stokes equation,the Reynolds equation suitable for liquid in two dimensional flow in the micro scale condition was deduced.Numerical simulation results show that bearing capacity and stiffness are largely changed under the effect 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.
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