150MD24Z7.5高速电主轴多场耦合模型与动态性能预测

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摘要电主轴是机电一体化产品，充分考虑并预测其动态特性是机床主轴系统优化设计的前提。本文基于电主轴内部磁场、电场、温度场、结构场间的耦合关系，建立了150MD24Z7.5高速电主轴多场耦合有限元模型，通过电主轴电机电磁损耗及轴承摩擦生热计算，仿真电主轴温度场及结构场变化，讨论电主轴热态特性与振动特性之间耦合关系，分析电主轴温升热膨胀后气隙变化对振动特性的影响并通过实验加以验证。研究结果表明，电主轴温升形变对振动幅值影响较大，其中由气隙变化引起的电磁力幅值增加12.1%。利用该多场耦合模型可预测电主轴振动幅值，预测误差为10.2%。

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关键词 ：电主轴, 耦合, 预测, 动态性能

Abstract：Motorized spindle is product of mechatronics. Its dynamic performance considered and predicted is the precondition for the optimization design of machine tool spindle system. Based on the coupling relationship among magnetic field，electric field，temperature field and structure field of motorized spindle, this paper establishes finite element model coupled multi-physics for 150MD24Z7.5 motorized spindle. By calculating electromagnetic loss and bearing friction heat, the temperature field and structure of motorized spindle is simulated, and the coupling relationship between thermal characteristics and vibration characteristics of motorized spindle is discussed. The effect of air-gap on the vibration characteristics by thermal deformation is analyzed and verified by experiment. The results show that thermal deformation influences greater on vibration amplitude, electromagnetic force amplitude increases by 12.1% caused by the change of air-gap. With the model coupled multi-physics can predict the vibration amplitude for motorized spindle and the prediction error is 10.2%.

Key words： Motorized Spindle Coupling Prediction Dynamic Performance

收稿日期: 2014-06-24 出版日期: 2015-12-25

引用本文:

张丽秀阎铭吴玉厚陆峰. 150MD24Z7.5高速电主轴多场耦合模型与动态性能预测[J]. 振动与冲击, 2016, 35(1): 59-65.
ZHANG Lixiu, YAN Ming, WU Yuhou, LU Feng. Model coupled multi-physics and prediction of dynamic performancefor 150MD24Z7.5 motorized spindle. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(1): 59-65.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I1/59

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