| 某型引风机变频改造后电机断轴原因分析 |
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| 引用本文： | 张磊,张俊杰,葛鸿昌,李英,杜晋峰,秦志文. 某型引风机变频改造后电机断轴原因分析[J]. 华北电力技术, 2013, 0(12): 50-52,72 |
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| 作者姓名： | 张磊 张俊杰 葛鸿昌 李英 杜晋峰 秦志文 |
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| 作者单位： | [1]神华国华北京电力研究院有限公司,北京100025 [2]华北电力科学研究院有限责任公司,北京100045 [3]中国科学院工程热物理研究所,北京100080 |
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| 摘 要： | 某电厂5A引风机进行以节能为目的的变频改造，运行频率由固定频率的50Hz改为13．5～50Hz，改造后的试验过程中发生了引风机电动机短轴事故。文章利用金相组织、扫描电镜等手段系统分析了电动机断口，并对轴系的安全性进行了分析，包括断口部分的应力分析、轴系扭转固有频率计算以及疲劳强度分析。分析结果认为，扭转共振是造成此次引风机电机断轴的主要原因。
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| 关 键 词： | 变频 引风机 断轴 改造 |
Analysis of An Induced Draft Fan Motor Shaft Failure After Inverter Retrofit |
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| Zhang Lei,Zhang Jun-jieI,Ge Hong-chang,Li Ying,Du Jin-feng,Qin Zhi-wen. Analysis of An Induced Draft Fan Motor Shaft Failure After Inverter Retrofit[J]. North China Electric Power, 2013, 0(12): 50-52,72 |
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| Authors: | Zhang Lei Zhang Jun-jieI Ge Hong-chang Li Ying Du Jin-feng Qin Zhi-wen |
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| Affiliation: | 1. Shenhua Guohua (Beijing) Electric Power Research Institute Co. , Ltd. , Beijing 100025, China; 2. North China Electric Power Research Institute Co. , Ltd. , Beijing 100045, China; 3. Institute of Engineering Thermophysics of Chinese Academy of Science, Beijing 100080, China) |
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| Abstract: | The inverter of induced draft fan 5 A was retrofitted for energy saving of a power plant. The operating fre- quency changed from 50 Hz to 13.5 -50 Hz. During the after-retrofit test,induced draft fan motor shaft broke. Sever- al approaches were used to analyze the fracture through metallurgical structure analysis and scanning electron micro- scope. The shaft system safety was also analyzed including fracture stress analysis, calculation of torsional natural fre- quencies of shaft system and fatigue strength analysis. The result showed that torsional resonance is the main reason of induced draft fan motor shaft failure. |
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| Keywords: | frequency inverter induced draft fan shaft failure retrofit |
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