桨叶比例伺服阀卡涩引起机械事故停机原因分析

Cause Analysis of a Mechanical Accident Shutdown

水电厂调速器是水轮发电机组重要控制设备之一,它运行品质的好坏直接决定了机组安全、稳定运行的成败,降低水轮机调速器故障率是提高机组运行可靠性的有效手段。比例伺服阀是直接控制主配压阀的电磁阀,对调速器系统的控制起到关键作用,当比例伺服阀故障时,调速器系统稳定性、可靠性下降,直接影响水轮发电机组安全、稳定运行。

The governor of hydropower plant is one of the important control equipment of hydraulic turbine generator unit.Its operation quality directly determines the safe and stable operation of the unit.Reducing the failure rate of hydraulic turbine governor is an effective means to improve the operation reliability of the unit.The proportional servo valve is a solenoid valve that directly controls the main pressure distribution valve and plays a key role in the control of the governor system.When the proportional servo valve fails,the stability and reliability of the governor system will decline,which will directly affect the safe and stable operation of the water turbine generator unit.