浅析水电站调速器液压系统内漏诊断与处理

Analysis and Treatment of Internal Leakage of Governor Hydraulic System in Hydropower Stations

调速器液压系统内漏会造成系统自启间隔时间缩短,压油泵启动频繁,回油箱油温升高等问题,甚至可能导致机组非计划停运,严重威胁机组的安全稳定运行。制定严谨的内漏试验流程,分析、查找内漏部位及原因,采取针对性的措施,在调速系统设计、制造、加工装配等方面精益求精,对系统各阀组的密封件进行闭环跟踪管理,在密封失效前进行“预防性检修”,可有效控制液压系统内漏问题。

Internal leakage of the hydraulic system of the hydro-turbine unit governor may lead to various problems such as the decrease of the interval of automatic startup of the system,frequent startup of the pressure oil pump,oil temperature rising of the sump oil tank,and even the unplanned shutdown of the unit,which may seriously affect the safe and stable operation of the unit.A rigorous internal leakage detection process is developed to locate the leakage position and the causes.Then,corresponding treatment measures are proposed.To effectively control the internal leakage problem,we should keep improving the quality of the design,manufacture,machining and assembly work of the governing system,adopt a close-loop tracking management of the seals of all valve parts,and conduct preventive maintenance before sealing failures.