THREE-COMPONENT LIQUID-PROPELLANT ENGINE Russian patent published in 2013 - IPC F02K9/48 

FIELD: engines and pumps.

SUBSTANCE: three-component liquid-propellant engine includes a combustion chamber with a system for regenerative nozzle cooling with the second fuel, a turbopump unit of oxidiser, a turbopump unit of the first fuel, a turbopump unit of the second fuel, each of which comprises the main turbine, pumps and an oxidiser gas generator; according to the invention, it also contains the second turbopump unit of the second fuel; at that, turbopump unit of oxidiser of the first fuel and the second turbopump unit of the second fuel have gas generators that are structurally aligned with their turbopump unit. Combustion chamber includes a head, a cylindrical part, a nozzle, three upper manifolds in upper cylindrical part of the nozzle and one lower manifold in lower part of the nozzle; outlet of the first main turbine of oxidiser turbopump unit is connected via a gas line to combustion chamber head, and fuel pump outlet is connected to lower manifold; the first upper manifold outlet is connected to the gas generator of the second fuel, and outlet of the second main turbine of turbopump unit of the first fuel is connected to the third upper manifold; the second fuel pump outlet is connected to the first upper manifold. Igniters connected through electric connections to an on-board computer are installed on the combustion chamber and gas generators. Three-component liquid-propellant engine contains a central hinge made on gas line on combustion chamber longitudinal axis. Central hinge has either a cylindrical, or a spherical shape. All turbopump units are attached by means of tie-rods with hinges. All turbopump units are attached to a divergent section of the nozzle. All turbopump units are attached to a critical section of the nozzle. All turbopump units are attached by means of pairs of tie-rods.

EFFECT: improving operating characteristics.

21 cl