欢迎访问润滑与密封官方网站!

咨询热线:020-32385313 32385312 RSS EMAIL-ALERT
基于气穴模型的动压轴承动态油膜刚度计算方法
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(11272204).


Method for Calculating Dynamic Stiffness Coefficients of Hydrodynamic Bearing Based on Cavitation Model
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对雷诺方程很难准确反映动压轴承高速转动过程中引起的周向惯性效应、动态挤压效应等的影响,进而导致油膜动态刚度计算精度难以满足高精度轴承设计的现状,提出用ADINA软件先求解瞬态油膜压力分布和瞬态油膜力,得到轴心轨迹,然后结合差分计算模型计算油膜动态刚度的方法。该计算方法基于流固耦合和气穴模型,定义油膜和轴的流固耦合时,采用任意的拉格朗日-欧拉(ALE)算法有效避免了油膜网格畸变的问题,再现轴心动态平衡过程和三维流场压力分布的动态发展过程,得到瞬态过程中的动态油膜力和动态油膜刚度。试验结果和基于流固耦合和气穴模型的计算结果对比分析发现两者基本吻合,说明该基于流固耦合和气穴模型的数值仿真计算方法是可行和有效的。

    Abstract:

    For the reason that Reynolds equation is not suitable for reflecting hydrodynamic bearings with high speed rotation coupled by inertial effect of oil circumferential flow and dynamic squeeze effect of the journal,the calculating accuracy of dynamic stiffness coefficients can not satisfy optimal design of highprecision bearings.A new approach of calculating stiffness coefficients of journal bearings was developed.Transient oil film pressure distribution and transient oil film force were solved with ADINA firstly,and the orbits of shaft centerline was obtained.The dynamic stiffness of oil film was calculated with the difference calculation model.In the new approach,the fluid structure interaction and cavitation model are used,Arbitrary-Lagrangian-Eulerian(ALE)method is adopted to avoid the grid distortion of fluid domain in the fluidsolid coupling analysis between the oil and shaft.The dynamic balance process of the axis and the dynamic development process of the pressure distribution of the threedimensional flow field are well simulated by the new approach,and the dynamic oil film force and dynamic oil film stiffness in the transient process are obtained.The comparison between the experimental results and the calculation results based on fluid solid coupling and cavity model shows that the two are basically identical.It is shown that the numerical simulation method based on fluid solid coupling and cavity model is feasible and effective.

    参考文献
    相似文献
    引证文献
引用本文

朱希玲,荆建平.基于气穴模型的动压轴承动态油膜刚度计算方法[J].润滑与密封,2019,44(9):120-125.
. Method for Calculating Dynamic Stiffness Coefficients of Hydrodynamic Bearing Based on Cavitation Model[J]. Lubrication Engineering,2019,44(9):120-125.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-03-12
  • 出版日期: