一种球面气体静压轴承的建模与仿真  

The Design of an Externally Pressurized Gas Bearing

作　　者：张海兵[1] 姚英学[1] 秦冬黎[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《润滑与密封》2006年第12期124-127,共4页Lubrication Engineering

摘　　要：介绍了一种小孔节流式球面气体静压轴承,该轴承的加工工艺性较好,而且在各个方向上都有较大的支承力;针对该轴承支承力的计算提出了一种有限划分计算方法,在建模中考虑到气膜压力分布的不对称性,将轴承根据节流孔的数目划分为数个等分,对每个等分再进行有限划分,若划分数足够多,可以认为在每个小等分中的气膜压力沿划分方向无变化,以小等分中心的压力代替,从而简化了轴承的气膜压力分布的求解;借助MATLAB软件队轴承的支承性能进行了仿真计算,并通过实验进行比较验证,实验结果与仿真结果基本一致。Gas lubricated bearing, having many advantages that other bearings can not match, for example high precision and high speed, has been used widely in ultra-precision machine tool and inertia apparatus. The paper An orifice restrictor externally pressurized spherical gas bearing was introduced,which is easily shaped and has reasonable stiffness in both axial and radial directions. A bearing force calculation model based on finite partition of the bearing＇ s gas-film was presented, which simplifies the calculation of the bearing＇ s pressure distribution. Considered the influence of the asymmetry pressure distribution, the gas-film area was divided into parts according to the orifices＇ number firstly, and then subdivided every part, until pressure along the divided direction could be considered uniform in the small part. The pressure in part was represented by that in its center. Simulation was carried out by the use of MATLAB and its result was validated by experiments.

关 键 词：静压轴承 节流孔 均压槽 气膜厚度 质量流量 

分 类 号：TH133.36[机械工程—机械制造及自动化]