环面节流静压气体球轴承的相似准则

从静压气体润滑基本控制方程组的无量纲化着手,在详细分析静压气体轴承的耦合边界条件及非定常雷诺气体润滑方程特性的基础上,对Constantinescu给出的动压气体轴承相似准则进行补充,得到环面节流静压气体球轴承定常气体润滑膜及非定常气体润滑膜的相似准则.数值实验的结果表明:数值计算结果与相似理论分析结论完全一致;当其它参数不变时,不同球半径的2个球轴承的气膜流场相似;球半径改变对轴承动静态性能的影响可以利用相似理论进行分析.

Similitude Criteria of Externally Pressurized Spherical Gas Bearing with Inherent Compensation

In view of general equations of externally pressurized gas lubrication in dimensionless form,coupling boundary conditions of externally pressurized spherical gas bearing and characteristics of non-steady Reynolds' equations were analyzed particularly.Similitude criteria for steady operation and non-steady operation of externally pressurized spherical gas bearing with inherent compensation were deduced,which may be considered a corrected form to the similitude criteria of hydrodynamic gas bearing put forward by V.N.Constantinescu.Computation results was surely in agreement with analyzed conclusion of similitude theory and two spherical gas bearing only with different radius should operate similarly with other parameters retain fixed.Influence to bearing's static and dynamic characteristics can be estimated by similitude criteria due to changes of sphere radius.