理化检验-物理分册2026，Vol.62Issue(3)：45-52,8.DOI:10.11973/lhjy-wl240361
陆上风力发电机齿轮箱回油管开裂原因
Cracking reason of return oil pipe of onshore wind turbine gearbox
摘要
Abstract
After 2 years of operation of a large onshore wind turbine,the oil return pipe of the gearbox cracked.By means of macroscopic observation,chemical composition analysis,metallographic examination,mechanical property test and scanning electron microscope analysis,the causes of the cracking of the oil return pipe were analyzed,and the improvement measures were put forward.The results show that the improper control of the production process of the cracked tubing bellows led to the problems of the bellows,such as 32%thinner wall thickness,5.5 times of effective stiffness deviation,welding defects and stress concentration.The above multi-factor coupling effect greatly weakened the service performance of the bellows.Under the action of external cyclic load,the top of the welded fusion zone of the bellows of the wind turbine connecting parts initiated the crack source first due to stress concentration,and finally caused fatigue cracking.关键词
齿轮箱回油管/应力集中/焊接缺陷/加工硬化/疲劳开裂Key words
gearbox return oil pipe/stress concentration/welding defect/work hardening/fatigue cracking分类
信息技术与安全科学引用本文复制引用
黄成彦,厉旭旺,李贵方,金子文,范焕,黎相昊,魏煜锋..陆上风力发电机齿轮箱回油管开裂原因[J].理化检验-物理分册,2026,62(3):45-52,8.基金项目
广东省重点领域研发计划项目(2021B0101230002) （2021B0101230002）
广东省海洋经济发展专项资金项目(粤自然资合[2022]25号) （粤自然资合[2022]25号）
