| 发电机组轮毂变桨轴承螺栓断裂原因分析 |
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| 引用本文： | 冯凌超,韩波,李晔,徐登波,钱锟. 发电机组轮毂变桨轴承螺栓断裂原因分析[J]. 理化检验(物理分册), 2011, 0(5): 315-317 |
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| 作者姓名： | 冯凌超 韩波 李晔 徐登波 钱锟 |
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| 作者单位： | 上海宝冶工程技术有限公司; |
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| 摘 要： | 某风力发电公司的变桨轴承螺栓在使用半年后发生断裂。采用金相检验、化学成分分析、硬度测试及断口分析等方法对该螺栓断裂的原因进行了分析。结果表明:裂纹起源于螺帽与螺杆连接的R角处,该处为应力集中部位,在螺栓松动后,垫片在交变载荷的作用下不断撞击螺栓R角处并在螺杆表面造成损伤,当损伤达到一定程度后,再加上螺杆表面存在脱碳现象,造成表面裂纹的萌生,裂纹在交变载荷的作用下扩展,导致螺栓发生疲劳断裂。
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| 关 键 词： | 变桨轴承 螺栓 脱碳 疲劳断裂 |
Fracture Reason Analysis on Pitch Bearing Bolt of Wheel Boss in Generating Set |
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| FENG Ling-chao,HAN Bo,LI Ye,XU Deng-bo,QIAN Kun. Fracture Reason Analysis on Pitch Bearing Bolt of Wheel Boss in Generating Set[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2011, 0(5): 315-317 |
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| Authors: | FENG Ling-chao HAN Bo LI Ye XU Deng-bo QIAN Kun |
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| Affiliation: | FENG Ling-chao,HAN Bo,LI Ye,XU Deng-bo,QIAN Kun (Shanghai Baoye Engineering Technology Corp.,Ltd.,Shanghai 200941,China) |
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| Abstract: | Some pitch bearing bolts broke after using for six months in a wind power company.By means of metallographic examination,chemical composition analysis,hardness testing and fracture analysis,the fracture reason of the bolts were analyzed.The results showed that the cracks originated at the R corner between the nut and screw,where was the stress concentration position.After the bolts loosed,the gasket impacted the R corner of holt and damaged the surface of screw under the alternating load.When the damage rea... |
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| Keywords: | pitch bearing bolt decarburization fatigue fracture |
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