Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine

CUI Yahui; ZHANG Junjie; GU Junsheng; WEI Kun'an; LI Hongwei; LI Ran

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Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine

Thermal Power Generation Vol. 42, Issue 9, Pages: 118-120(2013)

更新时间：2025-09-28

- Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine
- 作者机构：
  
  1. 神华国华(北京)电力研究院有限公司
  2. 河北国华定洲发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK268
- Published：2013
- 稿件说明：
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CUI Yahui, ZHANG Junjie, GU Junsheng, et al. Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine[J]. Thermal Power Generation, 2013, 42(9): 118-120.
DOI：

CUI Yahui, ZHANG Junjie, GU Junsheng, et al. Diagnosis and management of exceptional vibration frequency in a certain supercritical 660MW steam turbine[J]. Thermal Power Generation, 2013, 42(9): 118-120. DOI：

摘要

针对某超临界660MW空冷机组运行中存在的3.5倍频和7倍频异常振动故障

通过测量其轴承瓦盖振动频率、对轮罩振动频率以及传感器支架的固有频率

认为振动原因为对轮罩和传感器支架存在3.5倍频和7倍频的固有频率

导致机组运行中该对轮罩和传感器支架发生了共振。取消对轮罩后

该机组异常振动得以消除。

Abstract

Abnormal vibration with 3.5and 7times frequency occurred on turbine of a supercritical660MW unit.The vibration frequency of bearing shell

the vibration frequency and natural frequency of coupling cover

the natural frequency of sensor bracket were measured.The results showed that

the resonance occurred on the coupling cover and sensor bracket during operation which caused by the natural frequency with 3.5and 7times frequency was considered as the major reason.After the cover of coupling was removed

the abnormal vibration didn't occurred again.

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