Study on Water Erosion in Deep Peak Shaving of Steam Turbine

Yunfeng LIU; Yufeng LI; Jian WANG; Yiliang MA; Chun GUAN

doi:10.12096/j.2096-4528.pgt.21012

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Study on Water Erosion in Deep Peak Shaving of Steam Turbine

Intelligent Turbine Power Generation Technology | 更新时间：2025-07-04

- Study on Water Erosion in Deep Peak Shaving of Steam Turbine
- Power Generation Technology Vol. 42, Issue 4, Pages: 473-479(2021)
- 作者机构：
  
  哈尔滨汽轮机厂有限责任公司, 黑龙江省哈尔滨市 150046
- 作者简介：
- 基金信息：
- DOI：10.12096/j.2096-4528.pgt.21012
  CLC： TK26
- Received：23 February 2021，
  
  Published：31 August 2021
- 稿件说明：
移动端阅览
Yunfeng LIU, Yufeng LI, Jian WANG, et al. Study on Water Erosion in Deep Peak Shaving of Steam Turbine[J]. Power Generation Technology, 2021, 42(4): 473-479.
DOI：

Yunfeng LIU, Yufeng LI, Jian WANG, et al. Study on Water Erosion in Deep Peak Shaving of Steam Turbine[J]. Power Generation Technology, 2021, 42(4): 473-479. DOI： 10.12096/j.2096-4528.pgt.21012.

摘要

为研究汽轮机深度调峰引起的末级动叶片水蚀问题，提高机组的寿命，采用计算分析与机组运行经验结合的方法，在现有研究成果的基础上，结合合理的推论，综合考虑背压和负荷对水蚀的影响，建立了以相对容积流量为基准的叶片水蚀衡量方法。研究结果表明：随着相对容积流量减小，动叶水蚀部位从应力较小的顶部进汽边转移到应力较大的根部出汽边，危险性增大；动叶片水蚀率也随相对容积流量减小呈现出先上升、后下降、再上升的变化趋势，阶段间的转折点均对应一种平衡状态。

Abstract

In order to improve the life of the unit

and study the water erosion of the last stage moving blade caused by the deep peak shaving of steam turbine

this paper established a method to measure the water erosion of blade based on relative volumetric flow. The calculation analysis with operating experiences of the unit was employed. The influence of back pressure and load on water erosion comprehensively was taken into account. The results show that

with the decrease of relative volumetric flow rate

the water erosion part of the rotor blade is transferred from the top steam inlet side with lower stress to the root steam outlet side with higher stress. It results in the increase of risk. With the decrease of relative volume flow

the water erosion rate of moving blade shows three stages: first increasing

then decreasing

and rising finally. The turning point between stages corresponds to a balanced state.

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