水布垭电厂2F机组水导轴承外循环油管路故障分析

对水布垭水电厂水轮机水导外循环油路在运行中出现的故障进行了分析,查明了原因:2号油泵出口逆止阀两端法兰连接处渗油严重,造成管路内油存量不足,导致机组启动后备用泵被迫启动,并采取了解决措施,改造后的水导外循环油泵运行良好。

Failure Analysis for External Circulation Oil Line of Water Guide Bearing of 2F Turbine Unit in Shuibuya Hydropower Station

The failure occurred in the external circulation oil line of water guide bearing of 2 F turbine unit in Shuibuya hydropower station is analyzed .A serious oil leakage is found in the flange connections at both ends of the backflow bar-riers of the 2#pump outlet, resulting in an insufficient oil stocks in the pipelines .The standby pump is then forced to start when the unit began to operate .With some treatment measures , the external circulation pump of water guide bear-ing runs well after improvement .