FUEL TANK PRESSURE SYSTEM Russian patent published in 2023 - IPC B64D37/16 

FIELD: rocket and space technology.

SUBSTANCE: fuel tank pressurization system contains a source of pressurization gases (3), a pressure reducer (5), a boost cut-off valve (6), an indicator (7) of the boost pressure of the tank, a pipeline (8) for dumping boost gases from the tank, an additional gas cylinder (9), two-position electromagnetic gas distributor (10). A check valve (31) is installed in the line connecting the outlet (30) of the gas-hydraulic compressor unit (15) with an additional gas cylinder (9). Electric limit switches (36, 37) are installed on the right (34) and left (35) ends of the cylinder (16). An electrohydraulic pump (38) with a working fluid tank (39) and a three-position four-line electromagnetic hydraulic distributor (40) contains an inlet fitting (41) connected to the pump discharge line (38). The drain fitting (42) is connected to the tank (39) of the working fluid, and the working outlets (43, 44) are connected to the hydraulic piston-less cavities (45, 46) of the compartments (17, 19) of the cylinder (16), as well as to the left (47, 48) and right (49, 50) control cavities of three-line hydraulically controlled gas distributors (28, 29).

EFFECT: safe discharge of pre-pressurization gases from the tank and the possibility of re-pressurization of tanks when the start is cancelled are achieved.

4 cl, 4 dwg