PUMP SYSTEM FOR SUPPLY OF LIQUID TO CONSUMERS, FOR EXAMPLE TO ENGINE MAKING USE OF GAS FOR DRIVING SECOND STAGE Russian patent published in 1997 - IPC

FIELD: rocketry and space engineering; rockets and space objects equipped with liquid-propellant low- thrust engines. SUBSTANCE: second stage in pump system of two-stage rise of pressure of liquid is made in form of positive-displacement pumps whose gas distributing devices are connected with low-pressure reservoir by means of waste gas exhaust mains. Compressors mounted inside low-pressure reservoirs are connected with supercharging receivers by means of delivery mains. Liquid lines supplying the propellant to pumps and discharging it from them are provided with check valves. Besides that, mains used for discharge of propellant from pumps are provided with hydraulic accumulators. EFFECT: enhanced reliability. 8 cl, 1 dwg