摘要
针对神华内蒙古国华准格尔发电有限责任公司3号机组大修后高、中压排汽端轴封漏汽量大的问题,结合北京北重汽轮电机有限责任公司生产的机型特点,分析认为轴封间隙调整值偏大是轴封漏汽的主要原因。为防止长期轴封漏汽导致轴承箱内油中带水、重要保护测点损坏或误动等,在不改变汽轮机运行参数的情况下,新增1路高、中压缸排汽侧轴封回汽至低压疏水扩容器管道,大幅降低了轴封漏汽量,且未对机组真空造成额外影响,经济性显著提高。
Contrary to problem on turbine＇s high and intermediate pressure exhaust pipe shaft seal large leakage after overhaul in Shenhua Inner Mongolia Guohua Zhungeer Power Generation Co.,Ltd.No.3 unit,also combining with the unit model features,analysis that main reason is bearing clearance adjustment value too large.In order to prevent long-term shaft seal leakage lead to oil with water in bearing box and important protection measuring point damagement,add a new pipeline between gland steam main pipe and low pressure hydrophobic expansion,which has reduced seal steam leakage greatly,also has not affect the vacuum,can be reference for other units of similar transformation.
出处
《内蒙古电力技术》
2016年第2期94-96,100,共4页
Inner Mongolia Electric Power
关键词
汽轮机
轴封系统
漏汽
轴封间隙
低压疏水扩容器
steam turbine
shaft seal
leakage
bearing clearance
low pressure hydrophobic expansion
