Fatigue Simulation and Analysis on Planetary Gear of Megawatt Wind Power Yaw Reducer

Abstract

The new type wind power yaw reducer has been virtually assembled in Pro/E for the operating conditions of the Megawatt wind power yaw reducer. The planetary gear contact model of the new type wind power yaw reducer has been built to simulate the change of the contact stress in the process of planetary gear operation with the interface of Pro/E and ANSYS. The results show that: the initial maximum contact stress of the meshing planetary gear is 395MPa and the maximum stress in the engagement process is 460MPa, but it is still less than the material yield limit of the planetary gear. The results also show that the fatigue life of the gear teeth is 125,800 times, the cumulative fatigue factor is 0.72501 by analyzing the fatigue loads and 42CrMo’s S-N curve of Megawatt wind power yaw drive planetary gear, so it can meet the design and operation requirements for the Megawatt wind power yaw reducer.