汽泵小汽轮机挂闸异常的原因及对策  

Cause and Countermeasure of Abnormal Brake Hanging of Small Steam Turbine with Steam Feed Pump

作　　者：李勇[1] LI Yong(Operation Department of Jiangsu Huadian Yangzhou Power Generation Co.,Ltd.,Yangzhou 225000,China)

机构地区：[1]江苏华电扬州发电有限公司运行部

出　　处：《安徽电气工程职业技术学院学报》2019年第3期112-116,共5页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：锅炉给水泵作为火力发电厂中重要辅机设备,其运行的稳定性直接影响整个机组的经济性和安全性。江苏华电扬州发电有限公司2×330 MW机组给水泵采用小汽轮机驱动,在近几次机组启动过程中多次出现#72汽动给水泵挂闸不正常的现象。本文主要通过分析危急遮断器的结构、工作原理及故障现象,对故障的原因进行逐一排查,最终得出了汽动给水泵挂闸不正常的原因是因为危急遮断器滑阀使用年限过久、间隙变大,导致挂闸不正常,最后通过调整滑阀弹簧压力后,缺陷得以消除。该处理方法可以为其他同类型机组提供借鉴。As an important auxiliary equipment in a thermal power plant,the stability of boiler feed water pump directly affects the economy and safety of the whole unit.The feed water pump of 2x330 MW unit in Jiangsu Huadian Yangzhou Power Generation Co.,Ltd.is driven by a small steam turbine.Recently,there have been many abnormal phenomena of steam feed pump suspension during unit start-up.By analyzing the structure,working principle and fault phenomena of the emergency interrupter,the causes of the fault are investigated one by one.It is concluded that the abnormal hanging gate is caused by the long service life of the sliding valve of the emergency interrupter and the larger clearance of the sliding valve.Finally,the defects can be eliminated by adjusting the spring pressure of the slide valve.

关 键 词：汽动给水泵 危急遮断器 滑阀 安全油 隔膜阀 

分 类 号：TK223.5[动力工程及工程热物理—动力机械及工程]