Vibration characteristics analysis of motorized spindle system using magnetic-ball bearing composite support

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (19) : 275-282.

XU Fangchao, WANG Zhengxin, ZHAO Chuan, SUN Feng, JIN Junjie, ZHOU Junyu, ZHAO Haining

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Abstract

In order to improve the stiffness and vibration resistance of the motorized spindle system, a composite supported motorized spindle supported by magnetic levitation bearing and angular contact ball bearing is proposed. The stiffness of the spindle system is ensured by ball bearings, and the magnetic bearing control system is introduced to suppress the spindle vibration. It can realize that the electric spindle system has good dynamic performance under the condition of ball bearing low preload. Based on ANSYS modal analysis, harmonic response analysis and transient dynamics simulation, the vibration response caused by unbalanced mass is analyzed, and the vibration characteristics of the magnetic bearing and ball bearing composite supported motorized spindle and the ball bearing supported motorized spindle are compared. The test platform of composite supported motorized spindle was built, and the vibration characteristics of the composite supported motorized spindle were tested and analyzed. The results show that, Compared with the ball bearing supported motorized spindle, the composite support system can effectively improve the critical speed of the rotor, reduce the vibration amplitude of the rotor and the stress of the ball bearing, so that the motorized spindle has higher dynamic stiffness.

Key words

magnetic bearing / composite support / motorized spindle / harmonic response analysis;vibration characteristics

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XU Fangchao, WANG Zhengxin, ZHAO Chuan, SUN Feng, JIN Junjie, ZHOU Junyu, ZHAO Haining. Vibration characteristics analysis of motorized spindle system using magnetic-ball bearing composite support[J]. Journal of Vibration and Shock, 2023, 42(19): 275-282

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