用CFD方法研究具有通用膜厚方程径向轴承的动压特性  

Research on Hydrodynamic Lubrication Performance of Journal Bearings Based on General Film Thickness Equation Using CFD Software

作　　者：庞晓平[1] 牛坤[1] 魏思远[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《中国机械工程》2012年第21期2521-2524,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51005257)

摘　　要：应用CFD软件FLUENT和COMSOL Multiphysics对具有通用径向方程的径向轴承建立有限元模型,并进行了三维数值仿真模拟,得到了动压径向滑动轴承内部的压力场分布,通过编程计算出雷诺边界条件下的承载力及相关参数。比较FLUENT和COMSOL Multiphysics的计算结果与数值分析的计算结果可知,对于具有通用型线方程的非圆弧轴承和圆轴承,FLUENT和COMSOL Multiphysics与数值分析计算的径向轴承动压特性一致,即非圆型线轴承的承载力大于圆弧型轴承的承载力,验证了通用膜厚方程理论的正确性。A finite element model for journal bearings possessing the general film thickness equation was established by FLUENT and COMSOL Multiphysics respectively.Three-dimensional simulation was conducted numerically for the pressure distribution of the hydrodynamic journal bearing.The load capacity and the related parameters were calculated under the Reynolds boundary conditions through the programming.Compared CFD results with the numerical results,the following conclusions can be drawn： For non-circular arc bearings and circular arc bearings based on the general profile equation,the hydrodynamic performance of journal bearings calculated by FLUENT and COMSOL Multiphysics are similar to those gotten by numerical calculation.Compared with the circular bearing,the load capacity of the non-circular bearing is improved,which verifies the theory of the general film thickness equation to be correct.

关 键 词：动压径向轴承 通用膜厚方程 FLUENT COMSOL 

分 类 号：TH133.37[机械工程—机械制造及自动化]