热网络法和有限元法保护轴承热分析研究  

Research on Thermal Analysis of Auxiliary Bearings Based on Thermal Network Method and Finite Element Method

作　　者：孔亚楠 薛玉君[1,2] 叶军[1,3] 余永健[1,2] KONG Ya-nan;XUE Yu-jun;YE Jun;YU Yong-jian(School of Mechanical and Electrical Engineering,He’nan University of Science and Technology,He’nan Luoyang 471003,China;He’nan Key Laboratory for Machinery Design and Transmission System,He’nan Luoyang 471003,China;Technology Centre,Luoyang Bearing Research Institute Co.,Ltd.,He’nan Luoyang,471003,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]河南省机械设计及传动系统重点实验室,河南洛阳471003 [3]洛阳轴承研究所有限公司技术中心,河南洛阳471003

出　　处：《机械设计与制造》2023年第10期31-35,共5页Machinery Design & Manufacture

基　　金：洛阳轴承研究所有限公司重大专项磁悬浮保护轴承研制与关键技术研究(2019ZYSXM06);国家重点研发计划高速精密悬浮轴承(2018YFB2000100);2018河南省省级引智项目(GZS2018005)。

摘　　要：在磁悬浮轴承系统中,悬浮转子会因突然断电而失去磁场力支撑,从而跌落到位于两端的保护轴承上,导致保护轴承内圈瞬间产生大量的摩擦热,使得保护轴承系统温度升高,影响保护轴承转动性能以及磁悬浮轴承的可靠性。根据轴承内部受载,得出轴承发热量,研究了保护轴承零件之间的生热及热传递关系。根据工况设置相应的热边界条件,运用有限元方法与热网络方法,对保护轴承进行热力学分析,获得保护轴承温度场分布,并对结果进行对比分析。结果表明:保护轴承的最高温度在背离开口的内圈端面处,外圈温度小于滚珠温度,滚珠温度小于内圈温度,内外圈温度分布不对称。In Magnetic bearing system,once the power is cut off and the magnetic field force is not supported,the high-speed levi-tation rotor will fall on the auxiliary bearing and generate a lot of frictional heat,which will cause the temperature of the auxil-iary bearing system to rise and affect the rotation performance of the auxiliary bearing.According to the internal load of the bear-ing,the heat generated by the bearing is obtained,and the relationship between the heat generation and the heat transfer be-tween the auxiliary bearing parts is studied.According to the working conditions,the corresponding thermal boundary conditions are set,and the thermal analysis of the auxiliary bearing is performed using the thermal network method and the finite element method.The temperature field distribution results of the auxiliary bearing are obtained,and the results are compared and ana-lyzed.The results show that the maximum temperature of the auxiliary bearing is at the end face of the inner ring with the back leaving port,the outer ring temperature is less than the ball temperature and the ball temperature is lower than the inner ring tem-perature,and the temperature distribution of the inner and outer rings is asymmetric.

关 键 词：磁悬浮轴承 保护轴承 热分析 热网络法 有限元分析法 立式转子 

分 类 号：TH16[机械工程—机械制造及自动化]