新型环面节流静压气体球轴承压力分布的实验研究  

Experimental Study on the Pressure Distribution of Externally Pressurized Spherical Gas Bearings with Inherent Compensation and Integrated Ball Socket

作　　者：郭良斌[1] 王祖温[1] 包钢[1] 李军[1] 

机构地区：[1]哈尔滨工业大学SMC气动技术中心

出　　处：《摩擦学学报》2005年第4期364-368,共5页Tribology

基　　金：国家863-704项目资助(2002AA742049).

摘　　要：设计了新型环面节流闭式静压气体球轴承及其测试装置,特别是球窝上测压孔的分布位置,介绍了轴承加工工艺及其制造精度的检测结果,以及压力分布测试系统的工作原理,研究了气膜压力分布规律.结果表明,实验结果验证了理论分析方法的正确性.由于研磨工艺的限制使得试验球窝呈喇叭口状,造成球窝边缘的实测压力小于理论计算压力值.轴承的制造误差、模型误差以及计算误差是主要的误差来源,在开发新型结构静压气体球轴承的过程中,轴承的制造工艺以及零件的检测技术非常重要.Externally-pressurized spherical gas-lubricated bearing with inherent compensation and integrated ball socket is a new type spherical gas bearing in applications in attitude control simulators of space vehicles.Pressure profiles measured across the film interface of the present gas bearing are presented. Configuration of the test spherical gas bearing and apparatus is described. Pressures of measuring points in gas film were sensed by digital sensor array, which is linked to tabulations assembled in pressure taps of ball socket. Gap heights were determined by measured flux which was made reconcile to theoretical calculated curves between gas flux and film gap. Measured pressures in center region of ball socket were coincidence with the theoretical calculated values, which indicated that a stagnant air flow is existed actually. Actual pressure of measuring points adjacent to socket periphery are generally lower than the calculated pressure values,because ball socket exhibit bell mouth due to bearings＇ manufacturing errors. Analysis to errors between experimental pressure values and theoretical pressure values shows that machining errors and model errors is the primary source of the whole error, computational error is minor.

关 键 词：静压气体球轴承 环面节流 压力分布测量 制造精度 

分 类 号：TH133.36[机械工程—机械制造及自动化] TH117.2