中文摘要：

磁悬浮磨削主轴在散热条件差、系统温度过高时,会导致转子部件热膨胀,产生热应力或改变磁力轴承以及电动机的间隙,从而降低系统的可靠性。研究采用试验测量和有限元分析相结合的方法,在考虑传导和辐射的传热方式下,建立磁悬浮磨削主轴热态分析有限元模型,利用有限元软件ANSYS对磁悬浮磨削主轴进行温度场分析,得到主轴组件的温度场分布。利用HY-2988G红外热像仪测量磁悬浮磨削主轴的温度场分布。研究表明,提高冷却效率可有效控制磁悬浮磨削主轴的温升,另外尽可能将温度监测点的位置选择在电动机处。通过对试验和理论结果的对比分析,得出磁悬浮磨削主轴的热设计及结构设计对系统工作时温度分布有着重要影响,同时可为其温度的在线监测和控制提供理论依据。

英文摘要：

The magnetic levitated grinding spindle（MLGS） can be in high temperature due to less heat dissipation.High temperature may cause thermal expansion which will reduce the reliability of the system because of thermal stress and gap changing of the magnetic bearings and the motor.Experimental measurements combined with finite element analysis are adopted in the research.With consideration of heat transfer modes of conduction and radiation,a finite element model for analyzing the thermal state of MLGS is built.Finite element software ANSYS is used to analyze the temperature field of MLGS,then the temperature field distribution of the spindle component is obtained.The HY-2988G.thermal infrared imager is used to measure the temperature field distribution of MLGS.The research shows that raising cooling efficiency can effectively control the temperature rise of MLGS,and the location of temperature monitoring point should be selected in the motor place.Through comparison and analysis of the experimental and theoretical results,it is concluded that the thermal design and structural design of MLGS have important influence on the temperature distribution of system in working,and can provide the theoretical basis for its online temperature monitoring and control.