某300 MW汽轮机组低压缸轴承油膜振荡原因分析与治理  

Causal Analysis and Treatment of a Case of Bearing Oil Film Oscillation Encountered by the Low Pressure Cylinder of a 300 MW Steam Turbine Unit

作　　者：阳超 YANG Chao(China Datang Corporation Jiangxi Branch,Nanchang 330038,China)

机构地区：[1]中国大唐集团有限公司江西分公司,江西南昌330038

出　　处：《电工技术》2024年第21期176-177,181,共3页Electric Engineering

摘　　要：对某300 MW汽轮机组低压缸轴承突发油膜振荡的原因进行了分析,得出此次油膜振荡的原因为高中压外缸中分面漏汽,引起中压缸#2轴承标高升高,#3轴承负载减小,#3轴承稳定性降低,诱发油膜振荡故障。对高中压外缸中分面漏汽进行处理,调整#2轴承标高以增加#3轴承负载,从而解决了油膜振荡故障。A systematic analysis was conducted on the causes of sudden bearing oil film oscillation in the low-pressure cylinder of a 300 MW steam turbine unit.It was found that the cause of this oil film oscillation was steam leakage on the split surface of the high and medium pressure outer cylinder,which caused the elevation of the #2 bearing in the intermediate pressure cylinder to rise,the dynamic load of the #3 bearing to decrease,and the stability of the #3 bearing to decrease,leading to bearing instability.After solving the steam leakage on the split surface of the high and medium pressure outer cylinder and adjusting the elevation of bearing #2,the bearing seat of the low-pressure cylinder has been reinforced,and the problem of sudden oil film oscillation was solved.

关 键 词：汽轮机组 油膜振荡 漏气 

分 类 号：TM621[电气工程—电力系统及自动化]