中国机械工程 ›› 2014, Vol. 25 ›› Issue (24): 3326-3333.

• 机械基础工程 • 上一篇    下一篇

液体静压转台倾斜油膜承载特性解析

熊万里;符马力;王少力;吕浪   

  1. 湖南大学国家高效磨削工程技术研究中心,长沙,410082
  • 出版日期:2014-12-25 发布日期:2014-12-30
  • 基金资助:
    国家自然科学基金资助项目(51275163);湖南省自然科学杰出青年基金资助项目(12JJ1006);教育部新世纪优秀人才支持计划资助项目(NCET-10-0368)
    National Natural Science Foundation of China(No. 51275163);
    Hunan Provincial Natural Science Funds for Distinguished Young Scholars of China(No.12JJ1006);
    Program for New Century Excellent Talents in University of Ministry of Education of China(No. NCET-10-0368)

Analyses   on  Tilted  Oil  Film Dynamical Characteristics  of  Hydrostatic Rotary  Tables

Xiong Wanli;Fu Mali;Wang  Shaoli;Lü  Lang   

  1. National Engineering Research Center for High Efficiency Grinding,Hunan University,Changsha,410082
  • Online:2014-12-25 Published:2014-12-30
  • Supported by:
     
    National Natural Science Foundation of China(No. 51275163);
    Hunan Provincial Natural Science Funds for Distinguished Young Scholars of China(No.12JJ1006);
    Program for New Century Excellent Talents in University of Ministry of Education of China(No. NCET-10-0368)

摘要:

针对CFD数值仿真计算过程中建模周期长、计算效率低的缺点,基于各封油边当量油膜厚度思想采用解析法来研究液体静压转台倾斜承载特性,推导了倾斜油膜承载力、弯矩和刚度的计算公式,提高了计算效率。利用CFD软件Fluent对油膜进行了数值仿真,结果表明倾斜油膜承载力误差保持在6%以内,弯矩误差保持在8%以内,验证了解析公式的可靠性。利用所提出的解析方法研究了倾斜位移率、供油压力、节流孔径和转速对油膜基本性能参数的影响规律。

关键词: 液体静压转台, 解析法, 数值仿真, 倾斜特性

Abstract:

The  disadvantages of the CFD(computational fluid  dynamics) numerical simulation such as long period of modeling and poor efficiency of calculation were displayed.An analytical method for studying tilted bearing characteristics of hydrostatic rotary tables was  proposed based on equivalent oil film thickness of each pocket margin.The  formulae of load capacity,moment  and stiffness for tilted oil film bearings were derived  and  computational efficiency was improved.Numerical simulation for oil film was also conducted by CFD software Fluent.The results show  that  tilted oil film bearing load capacity error between the analytical method and CFD remains at 6% or less.Furthermore,the moment error between two methods is kept at 8% or less.The reliability of the analytical method  was verified.The effects of tilted displacement rate,supply pressure,throttle aperture,rotation speed on the oil film basic performance parameters were studied by the analytical method.

Key words: hydrostatic rotary table;analytical method;numerical simulation, tilted   , characteristics

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