Interference fit calculation and stress analysis for rotor sleeve of magnetic gear
ZHANG Bing yi, DAI Si rui, FENG Gui hong
(School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

Abstract: Aiming at the problems that centrifugal force produced by the rotor during the rotation of the magnetic gear was easy to cause the damage of the surface mount permanent magnet, the high strength interference fit protective sleeve was investigated to protect the permanent magnet. After the analysis of the amount of interference fit and the calculation method of the stress between the inner rotor protection sleeve and the permanent magnet, for a magnetic gear speed of 56 r/min, the transmission ratio of 8, the interference fit and stress was calculated, then the stress of the permanent magnet was analyzed. According to the amount of interference and in order to analyze the stress of protective sleeve and permanent magnet by ANSYS Workbench15.0, the experiment platform was constructed and the stable operation of the prototype for a period of time was disassembled, the protective sleeve effect was observed. The results indicate that the simulation results are close to the theoretical values, and the surface of the inner rotor protective sleeve is smooth and free of bulge, it is proved the accuracy of numerical calculation. The protective sleeve can be used to protect permanent magnets.

Key words: magnetic gear; interference fit; stress analysis