RESEARCH ON FATIGUE LIFE OF FLEXIBLE GEAR RING OF PLANETARY GEAR TRAIN OF WIND TURBINE

Xie Gaomin; Zhang Xiangfeng; Zhou Jianxing; Xu Huachao; Wang Chenglong; Zhang Ronghua

doi:10.19912/j.0254-0096.tynxb.2021-0788

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (1) : 179-187. DOI: 10.19912/j.0254-0096.tynxb.2021-0788

RESEARCH ON FATIGUE LIFE OF FLEXIBLE GEAR RING OF PLANETARY GEAR TRAIN OF WIND TURBINE

Xie Gaomin, Zhang Xiangfeng, Zhou Jianxing, Xu Huachao, Wang Chenglong, Zhang Ronghua

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Abstract

In order to explore the fatigue damage law of the flexible inner ring gear of the planetary gear train of wind turbine under the action of dynamic meshing force, a dynamic model of the planetary gear train considering the structural flexibility of the inner ring gear was established. The time domain stress history of the inner ring gear structure was obtained by using transient dynamics simulation calculation, and the correctness of the dynamic stress simulation results was verified by experiments. The rain flow counting method is used to count the cyclic parameters of the stress spectrum, and Goodman method is used to correct the average stress. Then the bending fatigue life of the inner ring gear structure is calculated based on Miner linear damage theory. The influence of the stress change caused by the deformation of the inner ring gear structure on the fatigue life is analyzed. The change law of fatigue life of inner ring gear structure under support and different loads is analyzed. The results show that the fatigue life of the inner ring gear is affected by the deformation of the ring gear structure and the gear teeth. The thinner the flange is, the more severe the deformation of the inner ring gear structure is, the larger the life gap between the teeth is, and the more complex the fluctuation trend of the fatigue life of the teeth between the two supports is; When the flexibility of the ring gear is large, the maximum stress is caused by the deformation of the ring gear structure, and the fatigue failure point shifts from the root to the slot. When the flexibility of the ring gear is small, the fatigue life mainly depends on the deformation of the tooth.

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wind turbines / planetary gears / dynamic loads / dynamic stress / fatigue life

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Xie Gaomin, Zhang Xiangfeng, Zhou Jianxing, Xu Huachao, Wang Chenglong, Zhang Ronghua. RESEARCH ON FATIGUE LIFE OF FLEXIBLE GEAR RING OF PLANETARY GEAR TRAIN OF WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2023, 44(1): 179-187 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0788

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