东北电力技术2025，Vol.46Issue(4)：23-27,5.
3.0 MW风机叶片螺栓断裂分析
Analysis of 3.0 MW Fan Blade Bolt Fatigue
陈锐 1吴胜峰1
作者信息
- 1. 中电华创(苏州)电力技术研究有限公司,江苏 苏州 215123
- 折叠
摘要
Abstract
3.0 MW fan blade bolt is cracked,and obvious fatigue arc can be seen on its fracture surface.The breaking position is at the bottom of the bolt thread,and the final fatigue area is small,which is judged to be low-stress fatigue crack.A series of tests such as SEM&EDS,chemical composition,tensile properties and impact are carried out to compare the broken bolts and intact bolts.No obvious abnormality is found,and it is determined that the fatigue cause of the failed bolts is not directly related to the material of the parts itself.It can be seen from the stress analysis of bolts that the joints of bolts and nuts are stressed and become the initiation zone of fatigue cracks.When the bolt is subjected to alternating load,fatigue cracks occur at the stress concentration of the bolt,and even-tually spread along the maximum direction of stress,resulting in fatigue crack.关键词
叶片螺栓/断裂/疲劳/交变载荷Key words
blade bolt/crack/fatigue/alternating load分类
动力与电气工程引用本文复制引用
陈锐,吴胜峰..3.0 MW风机叶片螺栓断裂分析[J].东北电力技术,2025,46(4):23-27,5.
