热力透平2025，Vol.54Issue(4)：279-281,3.DOI:10.13707/j.cnki.31-1922/th.2025.04.008
某亚临界机组抱轴问题分析及优化
Analysis and Treatment of Bearing Seizing Fault in a Subcritical Power Generation Unit
曾辉1
作者信息
- 1. 上海汽轮机厂有限公司,上海 200240
- 折叠
摘要
Abstract
A 100 MW subcritical single-cylinder downward-exhaust condensing steam turbine in a steel plant encountered a shaft seizure fault during start-up and shut-down.Through detailed sorting and analysis of data before and after the fault,the fault type was accurately diagnosed as dynamic-static jamming,and its primary cause was the abnormal pressure drop in the shaft seal steam supply header,thereby,the cold air and cold steam flowed reversely into the high-temperature area.Based on this,a series of targeted solutions were proposed,including blanking the cylinder continuously,optimizing the commissioning process of the shaft seal steam supply system and adjusting the water spray logic of exhaust cylinder.These measures successfully restored the unit to normal state,and no similar fault occurred since then.The research results can provide reference for the trial operation and commissioning of new units of the same type.关键词
亚临界汽轮机/动静卡涩/轴封系统/故障分析Key words
subcritical steam turbine/dynamic-static jamming/shaft seal system/fault analysis分类
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曾辉..某亚临界机组抱轴问题分析及优化[J].热力透平,2025,54(4):279-281,3.
