波箔型径向气体轴承静态特性分析  

Static Characteristics Analysis of Bump Foil Journal Bearing

作　　者：徐磊[1] 焦映厚[1] 陈照波[1] 沈那伟[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《润滑与密封》2012年第8期27-32,共6页Lubrication Engineering

基　　金：黑龙江省自然科学基金重点项目(ZD200905)

摘　　要：建立考虑气体可压缩性和箔片变形的波箔型轴承气膜厚度模型,采用有限差分和松驰迭代法耦合求解Reyn-olds方程和气膜厚度方程,得到波箔型轴承气膜厚度和气膜压力分布,并分析波箔型动压径向气体轴承结构参数和运行参数对其静态性能的影响。结果表明:波箔型轴承数值分析结果与相关文献试验数据相符度较好,证明该模型的科学性与精确性;对比箔片轴承和传统刚性表面轴承气膜压力和气膜厚度的分布特点,表明箔片轴承具有更高的承载能力;随着偏心率、转速的增大,箔片轴承承载能力增大,偏位角减小;随着转速增大,气膜压力提高,箔片变形增大,最小气膜厚度增大。The film thickness model accounting for air compressibility and foil deformation was established. Reynolds equation and film thickness equation were coupled through pressure and solved by relaxation iteration method and finite difference method. The pressure distribution and film thickness of bump foil bearing were calculated, and the effect of structure and other parameters on static characteristics of bump foil journal bearing were analyzed. The numerical results of bump foil bearing are in good agreement with the experimental data of relevant references, the model is proved to be correct and accurate. The distribution rules of film pressure and thickness were compared between foil bearing and traditional rigid bearing, it is revealed that foil bearing has higher load capacity than rigid bearing. With the increase of eccentricity and speed, load capacity becomes larger, and attitude angle is decreased. With the increase of speed, the gas film pressure and foil deformation are increased, and the minimum gas film thickness is getting bigger.

关 键 词：波箔型轴承 弹性变形 有限差分法 静态特性 

分 类 号：TH133.37[机械工程—机械制造及自动化]