磁力齿轮内转子护套过盈量计算及其应力分析

针对磁力齿轮中转子在旋转时产生的离心力容易导致表贴式永磁体损坏的问题,将一个高强度过盈配合的保护套应用到永磁体的保护中。对内转子保护套与永磁体间的过盈配合量及其应力的计算方法进行了分析,对一台内转子速度为56 r/min,传动比为8的磁力齿轮,计算了内转子护套和永磁体的应力值以及护套的过盈量,并根据计算出的过盈量利用ANSYS Workbench15.0分析了护套和永磁体的应力,通过建立试验平台对稳定运行一段时间的样机进行了拆分,观察护套效果。研究结果表明:仿真结果接近理论计算值,内转子护套表面光滑无凸起,证明数值计算的准确性,该护套可用于保护永磁体。

Interference fit calculation and stress analysis for rotor sleeve of magnetic gear

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.