Gradual bend occurred on HP-IP rotor in 600MW level unit : fault diagnosis and treatment

ZHANG Junjie1; CUI Yahui 1; ZHOU Feng2; TANG Jianwei 3; GU Junsheng4; FAN Jingli 5 1.Shenhua Guohua(Beijing)Electric Power Research Institute Co.

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Gradual bend occurred on HP-IP rotor in 600MW level unit : fault diagnosis and treatment

Thermal Power Generation Vol. 42, Issue 7, Pages: 105-108(2013)

更新时间：2025-09-28

- Gradual bend occurred on HP-IP rotor in 600MW level unit : fault diagnosis and treatment
- 作者机构：
  
  1. 神华国华(北京)电力研究院有限公司
  2. 北京电联天时振动有限公司
  3. 神华陕西国华锦界能源有限责任公司
  4. 河北国华定洲发电有限责任公司
  5. 神华内蒙古国华呼伦贝尔发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK268
- Published：2013
- 稿件说明：
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ZHANG Junjie1, CUI Yahui 1, ZHOU Feng2, et al. Gradual bend occurred on HP-IP rotor in 600MW level unit : fault diagnosis and treatment[J]. Thermal Power Generation, 2013, 42(7): 105-108.
DOI：

ZHANG Junjie1, CUI Yahui 1, ZHOU Feng2, et al. Gradual bend occurred on HP-IP rotor in 600MW level unit : fault diagnosis and treatment[J]. Thermal Power Generation, 2013, 42(7): 105-108. DOI：

摘要

探讨了导致600MW等级机组高、中压转子发生渐进式弯曲的机理

提出了当等效应力超过蠕变极限后

残余应力通过蠕变逐渐释放导致转子弯曲的观点。分析了2台机组高中压转子的过临界振动数据及不同位置加配重对弯曲的影响

认为两侧加重、车削归圆和中部加重质量不足均难以阻止渐进式弯曲的进一步发展。对此

提出了在高中压转子中部施加适当的配重

将中部高温区域的等效应力降低至蠕变极限以下

从而抑制或终止转子继续弯曲的阻弯动平衡方法。实践证明

该方法可有效阻止转子渐进式弯曲的发展。

Abstract

The mechanism of gradual bend occurred on HP-IP(high pressure-intermediate pressure)rotor of the 600MW level unit was discussed.The viewpoint that the rotor was bended because of creep caused by gradual release of the residual stress when the equivalent stress exceeded the creep limit was put forward.The vibration data of two rotors under critical speed and the effect of counterbalance at different positions on vibration were analyzed.It summarized that such measures as weighting at both sides

returning to circle by turning

and shortage of correction mass at the middle of rotor can not restrain gradual rotor bending.A dynamic balancing method for restraining or stopping the continuous rotor bending was put forward

namely applying proper correction mass at the middle of rotor to decrease the equivalent stress in the middle high temperature region to the value below creep limit.

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