LIQUID-PROPELLANT ENGINE Russian patent published in 2013 - IPC F02K9/42 

FIELD: engines and pumps.

SUBSTANCE: liquid-propellant engine (LPE) includes a gas generator, a turbo-pump unit, feed and control elements, a regeneratively cooled chamber including a cylindrical part, a shaped nozzle, a mixing head including a housing, an oxidiser supply unit, a hydrogen supply unit and a kerosene supply unit. Coaxial spray injectors are installed in the above units of the mixing head along concentric circles and include a tubular housing with the main axial channel, as well as a blind tube fixed at least on one pylon coaxially to the housing inside it, which is made as an integral part of the pylon and the tubular housing. At least one inlet through hole is made in the pylon, which is spread along the pylon from external surface of the injector to the axial channel in the blind tube on the side of its blind end. The main axial channel of the tubular housing on the side of the outlet has stepped change of the flow passage, which is made so that the flow passage of the above housing is reduced from pylons to the outlet part mainly in the form of one confuser. A sleeve is installed on the outlet part of the tubular housing so that an annular cavity, in which screw channels are arranged, is formed between outer surface of the housing and inner surface of the sleeve. The above channels are spread on the side of outer surface of the injector till they interact with the main axial channel. On the side of the axial inlet of the tubular housing there made is an adjustment element in the form of a chamfer provided with possibility of changing its geometrical parameters during adjustment. Tubular housing is split-type. On outer surface of the blind tube, which is arranged in outlet part of the tubular housing, there made are pylons interacting with inner surface of the tubular housing; at that, longitudinal axes of the pylons are installed at an angle to longitudinal axis of the injector. In the pylons there are the channels, the outlet part of which is directed at an angle to longitudinal axis of the injector, which is different from the installation angle of longitudinal axes of the above pylons. Inlet part of channels is connected to the blind tube cavity, and the outlet part of those channels is connected to the annular cavity formed with tubular housing and blind tube; at that, axes of the above channels in pylons are located opposite to the direction of axes of screw channels in the annular cavity between the sleeve and the outer surface of the tubular housing. Blind tube is split-type and consists of a pylon part and a tip; at that, a jet nozzle is installed at their interface point; blind tube of the injector is fixed coaxially to the housing inside it on two radially directed pylons, which are equally spaced in a circumferential direction, inside each of which there arranged are two transverse inlet through holes relative to the injector axis.

EFFECT: increasing the economy of the working process at the injector operation both as three-component and two-component one.

2 cl, 6 dwg