Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine

WANG Jiasheng; ZHAO Jie; GAN Fei; XU Zhangfu; WANG Suobin

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Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine

Thermal Power Generation Vol. 44, Issue 10, Pages: 116-118(2015)

更新时间：2025-09-28

- Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine
- 作者机构：
  
  1. 贵州电力试验研究院
  2. 西安热工研究院有限公司
  3. 重庆大学
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.3
- Published：2015
- 稿件说明：
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WANG Jiasheng, ZHAO Jie, GAN Fei, et al. Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine[J]. Thermal Power Generation, 2015, 44(10): 116-118.
DOI：

WANG Jiasheng, ZHAO Jie, GAN Fei, et al. Analysis and treatments of abnormal vibration of a supercritical 600MW unit steam turbine[J]. Thermal Power Generation, 2015, 44(10): 116-118. DOI：

摘要

针对某超临界600MW机组汽轮机冲转过程中由于振动大发生跳闸故障

通过分析该机组跳闸时的BODE图和振动参数

推断机组存在大部件脱落

并伴随有较大的碰磨。经检查确认振动为汽轮机盘车齿轮联轴器螺栓鼓风挡板脱落

使盘车罩壳脱落在转轴上所致。拆除该鼓风挡板后

汽轮机冲转和机组运行均稳定正常。因此

建议制造厂在设计同类型机组时应考虑加固或者取消该螺栓鼓风挡板。

Abstract

Due to large vibration

a supercritical 600 MW unit steam turbine trapped during startup process.By analyzing the BODE diagram and vibration parameters

this paper concludes that shedding of large parts of the unit is the main cause of the malfunction

which is accompanied by rubbing between the static and dynamic parts.By checking out the unit bearing box

it makes sure that the screw bolt's blast baffle fell off during the unit start process

leading to break off of the turning gear's shell.After removing the blast baffle

the unit start up process and operation turned to normal.Therefore

it suggests that the blast baffle be reinforced or removed when designing the same type units.

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