Abstract:

Bearing gap internal fluid area of different eccentricities were studied by the CFX fluid dynamics software,Pressure,velocity distribution diagrams were got,the variation of the load capacity of bearing and bearing flow with different eccentricities were also obtained.The analysis results show that with eccentricity
increases,the gas film pressure distribution is no longer symmetrical;the peak velocity and the speed differences of gas film area are getting bigger and bigger;the load capacity of the bearing is non-linear increasing with the increase of eccentricity,and the bearing flow is non-linear decreasing with the increase of eccentricity.It provides the theory foundation for further improving the design of inherent hole restriction aerostatic radial bearings.

Key words: aerostatic bearing, Computational Fluid X(CFX), pressure field, velocity field

摘要：

利用流体动力学软件CFX对不同偏心率下的轴承间隙内部流体进行研究,得到了压力、速度分布图和偏心率对轴承流量及承载力的影响规律。分析结果表明,随着偏心率ε的增大,气膜上的压力分布不再对称,气膜区域速度峰值和速度差值越来越大,承载力呈非线性增大趋势,流量呈非线性减小趋势。研究结果为进一步改进固定孔节流气体静压径向轴承的设计提供了理论依据。

关键词: 气体静压轴承, CFX, 压力场, 速度场