电液伺服阀故障分析与预防措施

Analysis and Diagnosis of Failure of Electro-hydraulic Servo-valves

针对常见的双喷嘴挡板式滑阀力反馈电液伺服阀,结合河北国华定州发电有限责任公司运行过程中频频出现的伺服阀问题,尤其是汽门抖动及卡涩故障,进行诊断分析。实践中,通过严格控制EH油质指标(如颗粒度、酸值、电阻率、水分等)找出伺服阀维护方法,降低伺服阀故障率,确保机组安全、正常运行。

In view to double nozzle flapper valve force feedback electro-hydraulic servo valve in Dingzhou Power Plant which frequently failed, especially Jitter and jam valve failure, we analyze, measures are taken to find out maintenance method such as strict control of EH oil quality （granularity, acid value, resistivity and water content）, to reduce servo valve failure rate and to garantee safe opera- tion of the unit.