静压止推气体轴承性能仿真  

The Performances Simulation of Aerostatic Thrust Bearing

作　　者：黄灏[1] 刘品宽[1] 董泽光[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《计算机仿真》2010年第3期340-343,361,共5页Computer Simulation

基　　金：国家863计划(2006AA4Z334)

摘　　要：运用计算流体力学软件FLUENT仿真静压止推气体轴承性能,分析轴承的几何参数对系统性能的影响。采用不同几何参数的静压止推气体轴承的气膜建模并划分网格;运用FLUENT软件对轴承的气膜流场进行数值仿真,计算轴承在不同几何参数下的承载能力和气体流量。仿真结果表明静压止推气体轴承的节流孔直径和气膜厚度越小,气腔直径越大,轴承的承载能力和气膜刚度越好,同时气腔深度对轴承性能影响较小。FLUENT软件可以有效的应用于静压止推气体轴承的性能分析,而优化了静压止推气体轴承的设计,达到优化效果。Computational fluid dynamics software FLUENT is applied to simulate the performances of aerostatic thrust beating. The influences of the geometric parameters of the aerostatic thrust bearing on its performances are analyzed. The air films of the bearing with different geometric parameters are modeled. Then the flow fields of the air films are computed, obtaining the load capacity and gas consumption of the aerostatic thrust bearing. The influences of the geometric parameters on the load capacity and gas consumption of the aerostatic thrust bearing are analyzed. The simulation result shows that the load capacity and stiffness of the aerostatic thrust bearing are better when the diameter of the orifice restrictor of the bearing is relatively small, the air film of the bearing is thin, and the diameter of the air chamber is small. The depth of the air chamber has little influences on the performances of the bearings. The FLUENT can be effectively used on the performance analysis of aerostatic bearing, obtaining optimal design.

关 键 词：静压止推气体轴承 计算流体力学 几何参数 仿真 

分 类 号：TH133.35[机械工程—机械制造及自动化]