风电机组叶片螺栓断裂原因分析
Analysis of the Breakage of Bolts for Wind Turbine Blades
金献凯 1黄文兵 1成硕1
作者信息
- 1. 三峡新能源海上风电运维江苏有限公司,江苏 盐城 224000
- 折叠
摘要
风电机组叶片螺栓断裂为日常运维过程中的一项难题.从叶片螺栓的设计质量、安装等方面进行问题排查,通过理论分析和试验研究,借助断裂螺栓与正常螺栓检测比对,确定叶片螺栓断裂的直接和主要原因是预紧力不足导致螺栓与连接件在运行中存在相对位移并导致碰磨和挤压,螺杆表面损伤形成裂纹源引起疲劳断裂.安装时润滑剂涂抹不合格对预紧力的影响,运输过程中螺栓外部损伤对预紧力的影响,维护期过长或维护力矩不当,风机长期存在振动、风况不稳、极端环境等不确定因素也有重要影响;并针对以上因素提出了相关建议.
Abstract
The breakage of blade bolts in wind turbine units is a difficult problem in the daily operation maintenance.From the aspects of the design quality and installation of the blade bolts,the problem is analyzed in-depth.With theoret-ical analysis and experimental study,as well as comparison between the broken bolts and the normal bolts,it is deter-mined that the direct and main cause of the bolt breakage is insufficient pre-tightening force,which leads to relative dis-placement and collision and wear of the bolts and the connectors during operation.The surface damage of the screws be-comes cracking sources and causes fatigue breakage.Also,other important factors include the impact of unqualified lu-bricant application during installation on the pre-tightening force,the impact of external damage of bolts during transpor-tation on the pre-tightening force,excessive maintenance interval or improper maintenance torque,and uncertain factors such as long-term vibration,unstable wind conditions,and extreme environments of the wind turbines.Corresponding suggestions are then proposed.
关键词
叶片螺栓/断裂/相对位移Key words
blade bolts/breakage/relative displacement引用本文复制引用
出版年
2024
NETL
NSTL
万方数据