发电技术 ›› 2020, Vol. 41 ›› Issue (2): 198-201.DOI: 10.12096/j.2096-4528.pgt.19111

• 发电及环境保护 • 上一篇    下一篇

大型火电厂风机质量不平衡故障分析及处理

危威()   

  • 收稿日期:2019-07-29 出版日期:2020-04-30 发布日期:2020-04-23
  • 作者简介:危威(1981),男,工程师,主要研究方向为火电厂热能动力工程及电气自动化技术, 21488611@qq.com

Analysis and Treatment of Mass Unbalance Fault of Fan in Large Thermal Power Plant

Wei WEI()   

  • Received:2019-07-29 Published:2020-04-30 Online:2020-04-23

摘要:

质量不平衡是火电厂风机最常见的故障之一,有时即使是其他故障导致的风机振动,也会因质量不平衡引起的激振力而造成振动值成倍增加,因此提高动平衡精度至关重要。讨论了风机不平衡故障的频率、幅值以及相位特征,以便于准确判断故障原因;介绍了常用的2种现场处理方法,并提供了经验公式。最后通过2个现场动平衡案例,分析了大型风机现场动平衡的基本过程,表明同类设备采用相同影响系数可极大地提高动平衡效率。研究结果为火电厂风机不平衡问题的故障分析及处理提供参考。

关键词: 风机, 故障诊断, 动平衡, 影响系数

Abstract:

Mass unbalance is one of the most common faults of fans in thermal power plants. Sometimes, even the vibration of fans caused by other faults can be doubled by the exciting force caused by mass unbalance. Therefore, it is very important to improve the accuracy of dynamic balance. The frequency, amplitude and phase characteristics of unbalanced faults were discussed in order to judge the unbalanced faults accurately. Then, two common field treatment methods of unbalanced faults were introduced, and empirical formulas were provided. Finally, the basic process of field dynamic balancing of large-scale fan was explained through two cases of field dynamic balancing. It shows that the same influence coefficient will greatly improve the efficiency of dynamic balancing of similar equipment. The research results provide a reference for the fault analysis and treatment of fan imbalance in thermal power plant

Key words: fan, fault diagnosis, dynamic balance, influence coefficient

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