热力透平2024，Vol.53Issue(2)：140-144,5.DOI:10.13707/j.cnki.31-1922/th.2024.02.015
350MW汽轮机中压缸膨胀不畅原因分析及处理
Analysis and Treatment of Impeded Expansion of Intermediate Pressure Casing in a 350 MW Steam Turbine
李玉辉 1苗洪飞 1张晨雨 1耿宏伟 1陈孝晓1
作者信息
- 1. 华能洛阳热电有限责任公司,洛阳 471000
- 折叠
摘要
Abstract
There was impeded expansion in the intermediate pressure casing of a 350 MW supercritical steam turbine unit since its second year of operation,and the expansion difference was often close to the protection action value during the cold start-up of the unit,which resulted in lengthening of start-up time and more fuel cost.The main phenomena of the failure were presented,and analysis was carried out step by step combined with the information got from investigation and disassembly maintenance.The root of the problem was attributed to the exceeded installation gap between the left and right limit devices for the exhaust pipe of high pressure casing.By a series of measures,such as overhaul of sliding pin system and recovery of pipeline limit device,the turbine casing could expand smoothly.The research results can provide reference for the investigation,analysis and treatment for similar expansion failures of steam turbine casing.关键词
汽轮机/膨胀不畅/胀差/滑销系统/限位装置Key words
steam turbine/impeded expansion/expansion difference/sliding pin system/limit device分类
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李玉辉,苗洪飞,张晨雨,耿宏伟,陈孝晓..350MW汽轮机中压缸膨胀不畅原因分析及处理[J].热力透平,2024,53(2):140-144,5.
