1 000 MW机组给水泵汽轮机轴封系统故障分析及处理  

Fault Analysis and Management of Feedwater Pump Turbine Shaft Sealing System for a 1000 MW Unit

作　　者：余兴刚 魏海峰 朱太春 郭绪宏 蒋伯华 YU Xinggang;WEI Haifeng;ZHU Taichun;GUO Xuhong;JIANG Bohua(Hunan Province Key Laboratory of Efficient&Clean Power Generation Technologies,Changsha 410007,China;State Grid Hunan Electric Power Company Limited Power Research Institute,Changsha 410007,China;China Energy Yongzhou Power Generation Co.,Ltd.,Yongzhou 425000,China;Hunan Xiangdian Test&Research Institute Co.,Ltd.,Changsha 410004,China)

机构地区：[1]高效清洁发电技术湖南省重点实验室,湖南长沙410007 [2]国网湖南省电力有限公司电力科学研究院,湖南长沙410007 [3]国家能源集团永州发电有限公司,湖南永州425000 [4]湖南省湘电试验研究院有限公司,湖南长沙410004

出　　处：《湖南电力》2022年第5期119-122,共4页Hunan Electric Power

摘　　要：某新建燃煤电厂1000 MW机组采用1台100%锅炉最大连续出力容量的汽动给水泵,调试期间该机组给水泵汽轮机轴封系统出现轴封蒸汽带水和给水泵侧轴封管道异响的故障。通过调整与分析,发现造成上述故障的原因为轴封回汽管道安装方式设计不合理和凝汽器内轴封蒸汽管道套管安装不完善。采取在轴封回汽管道最低点处加装疏水水封筒、在凝汽器内轴封蒸汽管道上加装保温的措施,成功排除了给水泵汽轮机轴封系统的故障。A 1000 MW unit in a newly-built coal-fired power plant adopts a steam-driven feed water pump with a capacity of 100%boiler maximum continuous rating.During commissioning,the shaft seal system of the feed water pump turbine of this unit has the faults of water entrainment of shaft seal steam and abnormal noise of the shaft seal pipe at the side of the feed water pump.Through adjustment and analysis,it is found that the causes of the above-mentioned failures are unreasonable design of shaft seal steam return pipe and imperfect installation of shaft seal steam pipe sleeve in condenser.The fault of shaft seal system of feed water pump turbine has been successfully solved by installing hydrophobic water seal cylinder at the lowest point of shaft seal steam return pipeline and installing heat insulation on shaft seal steam pipeline in condenser.

关 键 词：给水泵汽轮机 轴封系统 轴封带水 轴封管道异响 

分 类 号：TK263.63[动力工程及工程热物理—动力机械及工程]