一、概述我国大、中型水电站机组的技术供水,一般采用以水泵为主供水,自流减压装置为备用供水的方式。水泵系统存在设备投资大、需要的备件及运行人员多、运行管理困难、维护及检修工作量大等缺点。为克服这些缺点,目前国内外正在采用射流泵技术供水来代替水泵供水。射流泵是利用上游水库压力水为动力, First, an overview of China’s large and medium-sized hydropower station technical water supply, the general use of the pump-based water supply, gravity decompression device for the backup water supply. Pump system exists large investment in equipment, spare parts and more staff needed, operation and management difficulties, maintenance and overhaul workload and other shortcomings. To overcome these shortcomings, at home and abroad are using jet pump technology to replace water pump water supply. Jet pump is the use of upstream reservoir pressure water as the driving force,