LIQUID ROCKET ENGINE POWERED BY CRYOGENIC FUEL Russian patent published in 2022 - IPC F02K9/48 

FIELD: rocket technology.

SUBSTANCE: invention relates to rocket technology, in particular to the creation of liquid rocket engines (LRE) using cryogenic fuel. A cryogenic liquid rocket engine containing a combustion chamber with a mixing head and a nozzle equipped with a cooling path, a turbopump unit with a rotor and a turbine as a drive and a cryogenic oxidizer pump and a hydrocarbon fuel pump with oxidizer and hydrocarbon fuel supply lines, the inlet of the pre-turbine cavity of which is connected by a main to the outlet of the cooling path, and the turbine cavity of which connected to the cavity of the mixing head, according to the invention, the inlet of the cooling path is connected by a feed line to the flow line of the turbopump of hydrocarbon fuel, and the turbine rotor is additionally equipped with a kinematic coupling unit with an additional drive with the possibility of straining the rotor from a state of rest, its rotation at the initial time of the turbopump unit with the possibility of disabling the additional drive in stationary mode.

EFFECT: invention provides for the expansion of the functionality of the LRE due to accelerated start-up with the possibility of using cryogenic liquefied natural gas- methane as a cooler and working fluid on the turbine.

4 cl, 6 dwg