电磁轴承系统动力学行为与辅助轴承性能的关系研究  

Research on the Relationship Between Dynamic Behavior of Active Magnetic Bearing System And the Performance of the Auxiliary Bearing

作　　者：孙喆 杨国军 赵晶晶 闫循石 时振刚 Zhe Sun;Guo-jun Yang;Jing-jing Zhao;Xun-shi Yan;Zhen-gang Shi(Institute of Nuclear and New Energy Technology,Tsinghua University;Collaborative Innovation Center of Advanced Nuclear Energy Technology;The Key Laboratory of Advanced Reactor Engineering and Safety,Ministry of Education)

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University [2]Collaborative Innovation Center of Advanced Nuclear Energy Technology [3]The Key Laboratory of Advanced Reactor Engineering and Safety,Ministry of Education

出　　处：《风机技术》2021年第4期67-74,共8页Chinese Journal of Turbomachinery

基　　金：National Key R&D Program of China[2018YFB2000100];the National Science and Technology Major Project of China(2019ZX069).

摘　　要：Auxiliary bearings(ABs)are important backup and safety components in active magnetic bearing(AMB)systems.The performance of ABs significantly affects the reliability,safety,and serviceability of theAMB system and the rotating equipment.Research on the dynamic behavior during the touchdown process is crucial for analyzing the severity of the touchdown and the behavior is closely related to the performance of theAB.In this paper,a friction torque coefficient is introduced to evaluate the performance ofAB and the touchdown process is simulated and evaluated with various values of this coefficient with a detailed rotor-AB model of a verticalAMB system.The results show that large friction torque coefficient will result in undesired backward whirl of the rotor and catastrophic large load on the AB.Based on these results,this paper suggests that large friction torque coefficient ofABshould be avoided in practice.

关 键 词：Active Magnetic Bearing System Auxiliary Bearing Rotor Touchdown Dynamic Behavior Friction Torque Coefficient 

分 类 号：TG1[金属学及工艺—金属学]