Research on influence of tooth profile parameters of electromagnetic balance head on self-locking torque

LIANG Jing-wei1,2,  LIU Bao-guo1,2, SHEN Hui-peng1,2
(1.School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou
450001, China; 2.Henan Key Laboratory for Superabrasive Grinding Equipment,
Henan University of Technology, Zhengzhou 450001, China)

Abstract: Aiming at the problem of self-locking torque of the electromagnetic active balancing head, a large number of simulation analysis methods were adopted, the influence law of the disk parameters on the self-locking torque was obtained. Firstly, based on the principle of magnetic circuit self-locking, aiming at the specific structure, the self-locking magnetic circuit was simplified into a structure composed of three parts of magnetic disk, permanent magnet and support ring and a three-dimensional model was established. Secondly, by means of finited element analysis and with the change of single variables, the influence of different teeth number, tooth length, tooth margin, tooth angle on the peak value of self-locking torque was calculated respectively. Finally, the simulation results were analyzed to obtain four parameters of the design optimization method. The research results show that the peak value of self-locking torque increases parabolically with the increase of the number of teeth.The peak value of self-locking torque increases with the increase of the tooth length. When the ratio of tooth margin to permanent magnet diameter is between 0.01~0.03, the peak value of the self-locking torque can obtain a large and relatively stable value. When the tooth opening angle is 15°, the peak value of the selflocking torque is large and the design calculation and processing are convenient.
Key words: electromagnetic balance head; permanent magnet self-locking torque; tooth shape parameter