RESEARCH ON TIME-VARYING RELIABILITY OF SLIDING-BEARING WIND TURBINE GEARBOX

Li Yao; Hu Jun; Wu Xiaolong; Deng Yue; Zhang Shuan; Zhu Caichao

doi:10.19912/j.0254-0096.tynxb.2024-1851

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (2) : 579-588. DOI: 10.19912/j.0254-0096.tynxb.2024-1851

RESEARCH ON TIME-VARYING RELIABILITY OF SLIDING-BEARING WIND TURBINE GEARBOX

Li Yao, Hu Jun¹, Wu Xiaolong¹, Deng Yue^1,3, Zhang Shuan¹, Zhu Caichao²

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Abstract

Due to the fatigue reliability issues of sliding-bearing gearboxes in large-megawatt wind turbines, the 6.2 MW WTG is taken as the research object. Internal and external excitations of gears, random loads, electromagnetic characteristics, and sliding bearings are comprehensively considered. The electromechanical coupling dynamics model of the WTG is built under random wind speed. The dynamic characteristics of the transmission components are studied. The strength degradation process of the transmission components throughout their life cycle is characterized using fracture mechanics theory. Based on reliability design theory and fuzzy reliability theory, a time-varying reliability model of a sliding-bearing WTG considering the fuzziness of allowable wear is established. The influences of strength degradation and sliding bearings on WTG's time-varying reliability are explored. Through experimental comparison and verification, the accuracy of the theoretical model meets engineering requirements.

Key words

offshore wind turbines / gear transmission system / reliability analysis / strength degradation / failure rate / sliding bearing

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Li Yao, Hu Jun, Wu Xiaolong, Deng Yue, Zhang Shuan, Zhu Caichao. RESEARCH ON TIME-VARYING RELIABILITY OF SLIDING-BEARING WIND TURBINE GEARBOX[J]. Acta Energiae Solaris Sinica. 2026, 47(2): 579-588 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1851

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