This paper built an elastic bearing model for the rotor of grinder electric spindle supported by electromagnet bearing and analyzed the mode of the rotor, educed the laws about the rotor inherent frequencies changing along with bearing

stiffness.Then,it analyzed steady state response characteristics of the rotor while applying grinding force. According to the node displacements of danger interface,stability of

spindle system is ensured initially.

 

supporting system of electromagnet bearing, grinder electric spindle, mode analysis, steady state response characteristics

以电磁轴承支承的磨床电主轴为研究对象，建立了转子的弹性支承模型，对其进行了模态分析，得出转子固有频率随支承刚度变化的规律;对施加磨削力时转子的稳态响应特性进行了分析，根据危险界面的节点位移，初步确定了主轴系统的稳定性。

 

电磁轴承支承系统, 磨床电主轴, 模态分析, 稳态响应特性