水轮机组高油压调速器机械液压系统最主要的组成部分是储能元件和执行放大元件,对其进行优化设计,可进一步提高系统的可靠性、减少日常维护工作量,并且降低了生产成本。对操作功小于或等于10000N·m水轮机组用的高油压调速器机械液压系统主要控制阀一般直接采用电液比例阀或数字阀,系统优化设计后,采用高速开关阀来替代原电液比例阀作为电液随动系统的主要控制阀,但也可根据用户需要,仍将电液比例阀作为主要控制阀。同时,优化后的系统取消了手动操作阀、手自动切换阀、液压锁等元件。由于全部采用液压通用元件,产品生产周期短、制造成本低,并且通用性增强,用同一种产品类型可满足不同的用户需求,提高了生产效率。实验证明能完全满足水轮机调速器液压控制系统的要求,特别适用于中小型水轮机调速器的液压控制系统的改进。

Power accumulator and execution amplifier are the most important components of the mechanical hydraulic system of high oil pressure governor for water turbine. Optimization of the two components could improve the system reliability,reduce daily maintenance workload and cut cost. Electro-hydraulic proportional valve and digital valve are the major control valves for the mechanical hydraulic system of high oil pressure governor of water turbine with operational power equal to or less than 10 000 N·m. In the optimization design,high-speed switch valve is adopted to replace electro-hydraulic proportional valve. However,electro-hydraulic proportional valve can also be remained according to customer’s requirements. Moreover,manual valve,manual and automatic switchover valve,and hydraulic lock are substituted by hydraulic universal components which have short production cycle,low cost,and stronger versatility to meet the requirements of different customers and to improve efficiency. The optimization design is suitable for middle and small sized water turbines.