新型环面节流静压气体球轴承动特性分析  

Finite Element Analysis the Dynamic Characteristics of Static-pressure Spherical Gas Bearings with Inherent Compensation

作　　者：郭良斌[1] 王祖温[1] 包钢[1] 李军[1] 

机构地区：[1]哈尔滨工业大学机电学院

出　　处：《中国机械工程》2004年第23期2069-2073,共5页China Mechanical Engineering

基　　金：国家 8 63高技术研究发展计划资助项目(2 0 0 2AA742 0 49)

摘　　要：通过引入无穷小半径的概念 ,解决了具有整体球窝面的环面节流静压气体球轴承球窝中心点保角变换不存在的数学困难。借助小参数摄动和伽辽金有限元法 ,给出了求解球面坐标系下二维非定常雷诺气体润滑方程的一种近似解法 ,从而建立起分析该结构球轴承铅垂方向上动态特性的一类理论方法。分析结果证明了新型环面节流气体球轴承具有充分、完全的稳定性能。在结构参数不变的情况下 ,轴承的动态特性随供气压力、气膜间隙高度以及摄动频率的变化而变化。The obstacle which conformal transformation of center point of the socket didn't exist was solved, by introducing an infinitesimal radius. Application of perturbation methods was made for decomposing transient Reynolds equation to steady pressure portion and transient pressure portion. On the basis of solution of steady pressure distribution Finite Element Method was used again to solve dynamic pressure distribution of the spherical gas film. Equivalent kinetics model of gas film-load mass was build and dynamic stiffness and damping curves were calculated. Solution of theoretical analysis quantitatively approves that the new type spherical gas bearing has complete stability.

关 键 词：静压气体球轴承 环面节流 动态压力分布 摄动法 伽辽金有限元法 

分 类 号：TH133.36[机械工程—机械制造及自动化]