变桨轴承套圈预损伤后的结构疲劳剩余寿命研究  

Research on structural fatigue residual life of pitch bearing rings after pre-damage

作　　者：张明乾 陈观慈[1] 丁崯珂 刘铭涵 毛华萍 ZHANG Mingqian;CHEN Guanci;DING Yinke;LIU Minghan;MAO Huaping(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650550,China;School of Mechatronics Engineering,Aksu Vocational and Technical College,Aksu 843000,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650550 [2]阿克苏职业技术学院机电工程学院,阿克苏843000

出　　处：《机械传动》2025年第1期37-43,52,共8页Journal of Mechanical Transmission

摘　　要：【目的】腐蚀疲劳断裂是风电变桨轴承一种主要的失效形式,常导致桨叶掉落停机。为此,提出了一种用变桨轴承局部代替整体的有限元模型,用以探究变桨轴承套圈腐蚀后的结构疲劳剩余寿命。【方法】采用有限元软件Ansys和三维断裂力学软件Franc3D相结合的方法,通过在变桨轴承套圈最大等效应力位置处插入预损伤来代替模拟腐蚀坑,研究受腐蚀的变桨轴承套圈在实际工况下的结构疲劳裂纹扩展路径及寿命。【结果】结果显示,受腐蚀影响,变桨轴承套圈在实际工况下的结构疲劳剩余寿命为2.2×10^(7)循环周次,大约2.3年,占设计寿命的11.6%。通过该结果,可以更好地了解变桨轴承套圈受腐后结构疲劳的特点,其可为相关领域的工程实践提供指导和参考。[Objective]The corrosion fatigue fracture of the wind turbine pitch bearing is a major failure mode,often leading to the blade detachment and shutdown.To this end,a finite element model of replacing the whole pitch bearing with a local one was proposed to investigate the structural fatigue remaining life of pitch bearings after corrosion of the raceways.[Methods]A combined method of finite element software Ansys and three-dimensional fracture mechanics software Franc3D was adopted to simulate the corrosion pit by inserting a pre-damage at the location of the maximum equivalent stress in the bearing ring.The crack propagation path and life of the corroded bearing ring were investigated under actual operating conditions.[Results]The results show that the remaining fatigue life of the corroded bearing ring under actual operating conditions is 2.2×107 cycles,approximately 2.3 years,accounting for 11.6%of the design life.Through this results,the characteristics of the structural fatigue of the bearing ring affected by the corrosion can be better understood,providing guidance and reference for engineering practices in related fields.

关 键 词：变桨轴承套圈 腐蚀 预损伤 剩余寿命 Franc3D软件 

分 类 号：TH133[机械工程—机械制造及自动化]