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某300 MW汽轮机组低压缸轴承油膜振荡原因分析与治理

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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.
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
A systematic analysis was conducted on the causes of sudden bearing oil film oscillation in the low-pressure cyl-inder 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.

steam turbine generator unitoil film oscillationsteam leakage

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中国大唐集团有限公司江西分公司,江西 南昌 330038

汽轮机组 油膜振荡 漏气

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(21)