静压气体轴承承载特性的数值计算研究  

Numerical Simulation Analysis on Load Capacity Characteristic of Aerodynamic Journal Bearing

作　　者：李健[1] 李青[2,3] 李晓明[2,3] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]中国科学院理化技术研究所,北京100190 [3]航天低温推进剂技术国家重点实验室,北京100190

出　　处：《润滑与密封》2016年第12期1-5,共5页Lubrication Engineering

基　　金：航天低温推进剂技术国家重点实验室基金项目(SKLTSCP1604)

摘　　要：以静压径向气体轴承为研究对象,采用有限差分法(FDM)耦合比例分割法求解静压气体润滑雷诺方程,利用MATLAB软件编写计算程序,采用超松弛迭代(SOR)的方法进行数值求解,获得气膜的压力分布,计算轴承的静态承载能力。该方法与CFD计算结果具有较好的趋势一致性,最大误差低于11%。利用程序求解分析静压气体轴承的静态承载特性随供气孔排数、供气压力以及转速的变化关系。结果表明:轴承的承载能力与偏心率、供气孔排数、转速成正比关系,对于双排供气模式,其稳压区的存在能够提升轴承的承载能力,并能削弱动压效应的影响。The load capacity characteristic of aerodynamic journal bearing was studied by numerically simulating the state non-linear Reynolds equation.The finite difference method （FDM） coupled with proportion division method were used to solve Reynolds equation by using successive over relaxation method in MATLAB programming. The load capacity was calculated by using the pressure distribution of the film, and the maximum deviation is less than 11% by comparing with CFD.The relationship between eccentricity ratio, sets of orifices, rotating speed and load capacity was studied.The results show that load capacity is improved with the increase of eccentricity ratio, row number of orifices and rotating speed.For the bearing with double rows of orifices, the area between orifices can improve the load capacity, and also weaken the influence of hydrodynamic effect.

关 键 词：气体轴承 有限差分法 雷诺方程 承载能力 

分 类 号：TH133.3[机械工程—机械制造及自动化]