动压箔片轴承气膜厚度分布特点  

Characteristics of Gas Film Thickness Distribution in Aerodynamic Foil Bearings

作　　者：王文升[1] 郑越青[1,2] 徐刚[1] 徐庆元[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《轴承》2014年第10期31-34,共4页Bearing

基　　金：中国工程物理研究院重点发展基金项目(2011A0203011);四川省战略新兴产品计划项目(2011GZX0098)

摘　　要：建立了考虑平箔片下垂效应的动压箔片轴承气弹耦合模型,以Reynolds方程描述气膜压力,以Euler梁单元描述平箔,以简单弹簧单元描述波箔。采用有限差分法和Newton-Raphson迭代法求解气膜压力方程,采用有限元法计算箔片变形,利用气膜压力与气膜厚度相互迭代逼近气弹耦合的收敛解。结果表明,在气膜压力较大区域相邻两支承箔拱之间的平箔段会发生微小的下陷弯曲,并伴随有压力场的局部变化。An aeroelastic coupling model for aerodynamic foil bearings considering sagging effect of top foil is developed,in which gas film pressure is described with Reynolds equation.The top foil is described with Euler beam elements,and the bump foil is described with easy spring elements.The gas film pressure equation is solved by using finite difference method and Newton-Raphson iterative method.The foil deformation is calculated by using finite element method,and the convergent solution of aeroelastic coupling is approximated by iterating gas film pressure and gas film thickness .The results show that in the region of high gas film pressure,there is small sag in the flat segment between the two adjacent bumps,while locally pressure field variation in this region.

关 键 词：空气动压轴承 气膜厚度 变形 压力分布 

分 类 号：TH133.37[机械工程—机械制造及自动化]