摘要
针对径向被动、轴向主动的混合式磁轴承(HMB)出现径向、轴向同时失效的现象,从力耦合的角度对其进行分析。将定子等效为两个对称的半圆盘,利用矢量叠加原理,建立了推力轴承的力耦合方程。并针对矢量叠加方式较难显性表述力耦合与刚度之间关系的缺点,将推力轴承等效为两个对称的半圆形轴承,利用轴向力的线性化解析方法,得到了HMB实现稳定悬浮需要满足的前提条件,并进一步得出了HMB的外载荷刚度。利用深沟球轴承的静态受力模型,建立了转轴的运动方程。结果表明,在转轴的运动方程中增加力耦合模型后,仿真分析与实验结果吻合较好。
This paper studies on the coupling mechanical characteristics and their effect on hybrid magnetic bearings （ HMB ） when the radial failure and axial failure occur simultaneously in HMB with thrust magnetic bearing （TMB） and pass ive radial magnetic bearing. The stator is equivalent to two symmetrical semicircular plates and then the magnetic force in TMB is calculated based on vector superposition principle. Howev er, the force equations cannot clearly express the relationship among coupling forces and stiffs. To overcome the drawback of the former equations, the TMB is equivalent to two symmetrical semicircular bearings and the linear method of axial force is used to obtain the preconditions to stabilize the HMB. Also , the stiffness of the external loads can be calcula ted. Furthermore, the axial motion equation is establ ished by the static model of deep groove ball bearings. Finally , simulation and experiment are done to prove the analysis and formulation.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第1期190-196,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目资助(51077021)
关键词
混合式磁轴承
推力磁轴承
力耦合特性
被动磁轴承
Hybrid magnetic bearing, thrust magnetic bearing, coupling mechanical characteristic, pass ive magnetic bearing
