扇形沟槽表面节流静压气体轴承的性能分析  

Performances Analysis of Aerostatic Bearing Restricted by Fan-shaped Surface Restrictor

作　　者：李运堂[1] 蔺应晓[1] 朱红霞[1] 

机构地区：[1]中国计量学院机电工程学院,浙江杭州310018

出　　处：《计算机仿真》2013年第4期243-247,共5页Computer Simulation

基　　金：国家自然科学基金"超精密静压气浮导轨的自激振动机理及设计方法的研究(50905171)";浙江省自然科学基金"高加速度高精度气浮运动系统的动力学建模与快速定位(Y1080100)";机械系统与振动国家重点实验室开放基金"纳米级定位平台静压气浮导轨的理论研究(MSV-2009-09)"

摘　　要：关于气体轴承承载能力优化问题。为增大静压气体轴承的承载能力,提高轴承的刚度,设计了一种扇形沟槽表面节流式静压气体轴承,并运用计算流体力学软件Fluent计算轴承的性能,分析几何参数对轴承性能的影响。结果表明,在一定气膜厚度下,增大节流面积可显著提高承载能力,增大节流槽长度可以增加轴承刚度,而在气膜厚度较小时,均压槽可以同时提高承载能力和刚度。当轴承直径相同时,所设计的静压气体轴承较小孔节流式具有更高的承载能力和更大刚度。In order to increase load carrying capacity and stiffness, a new type aerostatic bearing with surface - restrictor was designed in this paper. Moreover, Computational Fluid Dynamic software Fluent was used to calculate the performance of the bearing and the influence of geometrical parameters on the bearing＇ performance is analyzed. The results indicate that load carrying capacity significantly increases with restrictor area in certain film thickness. In- creasing the length of fan - shaped surface restrictor can improve beating stiffness. Furthermore, load carrying capac- ity and stiffness increase simultaneously with even groove in small film thickness. The bearing restricted by surface - restrictor has lar^er load carrvinz caDacitv and stiffness than that with orifice tvne ra^trictor_

关 键 词：气体轴承 表面节流 流体仿真 性能计算 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]