FIELD: aircraft and spacecraft.
SUBSTANCE: proposed system contains fuel tanks and oxidizer tanks, transfer main lines with start-and-cutoff valves and hydraulic joints arranged in coupling unit, pressurization system connected to gas spaces of fuel tanks by means of pneumatic main lines with start-and-cutoff valves and gas pressure regulator. Proposed topping up system includes bypass pneumatic main lines with additional start-and-cutoff valve, gas pressure regulator, two series-connected cutoff valves and pressure transmitter and indicator installed on section of main line between cutoff valves. Transmitter and indicator are connected with valve control unit. Bypass pneumatic main lines are connected between pressurization system and fuel transfer main lines either at output of high-pressure bottles, or after gas pressure regulator at input of gas spaces of fuel tanks directly after start-and-cutoff valves.
EFFECT: improved sealing of hydraulic joints, and efficiency of clearing of hydraulic main lines from remnants of fuel.
6 cl, 2 dwg
