球面螺旋槽气体动压轴承静态特性分析  

Analysis of Static Characteristics of Spherical Spiral Groove Aerodynamic Bearing

作　　者：贾晨辉[1] 杜彩凤[1] 邱明[1] 

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《液压与气动》2015年第10期52-55,60,共5页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51475142)

摘　　要：以球面螺旋槽气体动压轴承为研究对象,建立了球面螺旋槽气体动压轴承的润滑分析数学模型,基于CFD技术,采用流体动力学Fluent软件,对球面螺旋槽气体动压轴承的三维气膜压力场进行分析,揭示不同转速下,轴承槽宽比、槽深比、螺旋角、气膜间隙对稳态轴承气膜压力以及承载能力的影响规律,并在此基础上,对轴承的结构参数进行了优化。结果表明,应用Fluent软件进行数值分析可以精确地模拟区域内气膜的复杂流场特性,并且转速越高,气体轴承内部的动压效应就越明显,因此合理地选择轴承结构参数和运行参数有助于改善润滑性能,提高轴承的稳态承载特性。In order to research the static performances of lubrication analysis mathematical model is established. software Fluent to the Fluent software of fluid dynamics to spherical spiral groove aerodynamic bearings, the bearing Based on CFD technology, and we use the fluid dynamics analyze the 3 D gas film pressure field of the spherical spi- ral groove aerodynamic bearings. It reveals the laws that effect of the groove width ratio, groove depth ratio, helix angle and gas film clearance under different rotation speed on the steady-state bearing gas film pressure and the bearing capacity, and on this basis the structure of bearing parameters are optimized. The results show that the Flu- ent can easily and accurately simulate the complex flow field in the gas film area, and the higher rotation speed, the more obvious gas bearing internal hydrodynamic effect. Therefore, choosing reasonable bearing structural and oper- ating parameters contributes to improve the lubrication performance and bearing capacity.

关 键 词：气体动压轴承 球面螺旋槽 FLUENT 数值分析 承载特性 

分 类 号：TH138[机械工程—机械制造及自动化]