Typical case analysis of rotor mass imbalance and steam flow disturbance coupling vibration

ZHAO Bo; PAN Bo; WANG Wei; LIU Zhengang; WANG Hao; HE Guoan

doi:10.19666/j.rlfd.202206119

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Typical case analysis of rotor mass imbalance and steam flow disturbance coupling vibration

更新时间：2025-09-28

- Typical case analysis of rotor mass imbalance and steam flow disturbance coupling vibration
- Thermal Power Generation Vol. 51, Issue 12, Pages: 93-98(2022)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安西热节能技术有限公司
  3. 中铝宁夏能源集团有限公司六盘山热电厂
  4. 华能国际电力股份有限公司丹东电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202206119
  CLC： TM621
- Published：2022
- 稿件说明：
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ZHAO Bo, PAN Bo, WANG Wei, et al. Typical case analysis of rotor mass imbalance and steam flow disturbance coupling vibration[J]. Thermal power generation, 2022, 51(12): 93-98.
DOI：

ZHAO Bo, PAN Bo, WANG Wei, et al. Typical case analysis of rotor mass imbalance and steam flow disturbance coupling vibration[J]. Thermal power generation, 2022, 51(12): 93-98. DOI： 10.19666/j.rlfd.202206119.

摘要

汽流扰动和不平衡离心力综合作用下，高参数汽轮机高中压转子运行中易发生不稳定同步振动。通过转子-轴系振动控制方程的理论推导，分析了汽流扰动对汽轮机转子不平衡响应的影响机理，提出了不稳定同步振动故障诊断和处理方法。通过详细介绍2台300 MW等级汽轮发电机组振动处理案例，验证了分析提出的不稳定同步振动故障诊断和处理方法。此类振动故障现场处理可以通过增强系统稳定性、缓解汽流扰动和减小不平衡量3个方面开展。当调整轴承标高和改变高压调节阀开启顺序等措施无效时，可以通过现场精细动平衡来降低高中压转子的不稳定同步振动。

Abstract

Under the combined action of steam flow disturbance and unbalanced centrifugal force

unstable synchronous vibration is easy to occur during the operation of high and intermediate pressure rotors of high parameter steam turbines. Through theoretical derivation of the vibration control equation of rotor bearing system

the influence mechanism of steam flow disturbance on the unbalanced response of steam turbine rotor is analyzed

and then the fault diagnosis and treatment methods of unstable synchronous vibration are summarized. The vibration treatment cases of two 300 MW-level steam turbine generator units are introduced in detail

which verifies the proposed treatment strategy. The field treatment of such vibration faults can be carried out by enhancing system stability

alleviating steam flow disturbance and reducing mass unbalance. When the measures such as adjusting the bearing elevation and changing the opening sequence of high-pressure regulating valve are invalid

the unstable synchronous vibration of high and intermediate pressure rotor can be reduced through on-site precision dynamic balance.

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