摘要
气浮轴承是精密设备中的重要支承元件,轴承的承载力、稳定性对设备的性能起着决定性作用。其中有腔小孔节流气浮轴承的承载性能优于小孔节流气浮轴承,但均压腔中的自激微振动也制约着有腔小孔节流气浮轴承的应用。因此,以有腔小孔节流气浮轴承为研究对象,求解出轴承气膜间隙内的压力与速度分布,分析均压腔中不同位置处的圆角对轴承气膜流动特性的影响。结果表明:均压腔内存在圆角时,轴承的承载力会有一定幅度的提高,会使流场中的最高流速降低;节流孔出口处的圆角结构和均压腔末端处的圆角结构能在一定程度上减缓因气旋产生至耗散消失所带来的自激振动,提高轴承的稳定性。
Air bearing is an important supporting component in ultra-precision equipment,whose capacity and stability play an important role in the performance of the equipment.The bearing performance of the small orifice throttle bearing with cavity is better than that of the small orifice throttle bearing,but the self-excited vibration in the pressure equalizing chamber limits the application of the small orifice throttle bearing with cavity.In this paper,air bearing with orifice and pressure chamber was studied,the pressure and velocity distribution of air film was obtained.This paper analyzed the influence of different fillet position in the chamber on the gas flow characteristics of bearing.Simulation results show that,when the cavity has small fillet,the load capacity of bearing will increase and the maximum velocity of the flow field will decrease;when the orifice outlet and the cavity ending have small fillet,micro-vibration due to vortex generating and breaking-up will weaken and the stability of air bearing will raise.
作者
武静
钱俊兵
袁锐波
Wu Jing;Qian Junbing;Yuan Ruibo(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming City,Yunnan Province 650500,China;Faculty of Civil Aviation and Aeronautics,Kunming University of Science and Technology,Kunming City,Yunnan Province 650500,China)
出处
《农业装备与车辆工程》
2020年第10期48-53,共6页
Agricultural Equipment & Vehicle Engineering
关键词
气浮轴承
均压腔
圆角
气膜
气旋
air bearing
pressure cavity
fillet
gas film
vortex
