INFLUENCE OF PLANETARY GEAR SLIDING BEARING ON VIBRATION CHARACTERISTICS OF WIND TURBINE DRIVETRAIN

Fei Wenjun; Tan Jianjun; Zhu Caichao; Li Hao; Ye Wei; Sun Zhangdong

doi:10.19912/j.0254-0096.tynxb.2024-0196

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 645-658. DOI: 10.19912/j.0254-0096.tynxb.2024-0196

INFLUENCE OF PLANETARY GEAR SLIDING BEARING ON VIBRATION CHARACTERISTICS OF WIND TURBINE DRIVETRAIN

Fei Wenjun¹, Tan Jianjun^1,2, Zhu Caichao¹, Li Hao¹, Ye Wei³, Sun Zhangdong²

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Abstract

Under heavy load conditions, there is a complex nonlinear coupling relationship between the structure deformation of the wind turbine drivetrain and the dynamic clearance of the planetary gear sliding bearing, which easily causes the edge contact wear of the sliding bearing and reduces the stability of the system. Based on the 2MW wind turbine drivetrain, this study considers the flexibility of the contact interface of the planetary gear sliding bearing as well as the flexibility of the complex-shaped components such as the gearbox housing and the ring gear. The average flow Reynolds equation is used to compute the dynamic film thickness of the planetary gear sliding bearing. The correlation between the gearbox housing, ring gear, coupling points of the carrier and elastic support is established by the finite element reduction theory. A tribo-dynamic coupling model of wind turbine drivetrain with planetary gear sliding bearing is established. The influences of operating conditions of wind turbine drivetrain and structure parameters of the planetary gear sliding bearing on the dynamic characteristics of wind turbine drivetrain are investigated, and a test rig is conducted to validate the theoretical analysis. The results show that the uneven tooth load distribution of the planetary gear train system could be improved by increasing input torque and reducing the clearance of the sliding bearing. The planetary gear sliding bearing does not change the dominant frequency components of the system vibration acceleration response, but it will cause an extra frequency related to the rotational frequency of the planetary gear in vibration displacement, and increasing the width-diameter ratio and clearance of the planetary gear sliding bearing will increase the system vibration. The planetary gear sliding bearing is prone to solid contact under high-torque conditions, but reducing the width-to-diameter ratio and clearance of the planetary gear sliding bearing is conducive to improving the load-sharing performance of the planetary gear train system.

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wind turbines / drivetrain / sliding bearing / structural flexibility / dynamic characteristics

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Fei Wenjun, Tan Jianjun, Zhu Caichao, Li Hao, Ye Wei, Sun Zhangdong. INFLUENCE OF PLANETARY GEAR SLIDING BEARING ON VIBRATION CHARACTERISTICS OF WIND TURBINE DRIVETRAIN[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 645-658 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0196

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