MIXING HEAD OF LIQUID-PROPELLANT ENGINE CHAMBER Russian patent published in 2013 - IPC F02K9/52 

FIELD: engines and pumps.

SUBSTANCE: mixing head of a liquid-propellant engine chamber includes 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. An 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 blind tube channel is formed on the outlet side with its blind axial channel and on the inlet side with an inlet through hole in the pylon. 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 housing is reduced from pylons to the outlet part, in the form of a confuser. A sleeve is installed on the outlet part of the tubular housing so that an annular cavity related to the kerosene supply unit cavity is formed between external surface of the above housing and internal surface of the sleeve. Screw channels are arranged in the above cavity. On the side of axial inlet of the tubular housing there made is an adjusting element in the form of a chamfer provided with possibility of changing its geometrical parameters at adjustment, the tubular housing is split-type, on external surface of the blind tube arranged in outlet part of the tubular housing there made are pylons interacting with their external surface to internal surface of the tubular housing; at that, longitudinal axes of the above pylons are installed at an angle to longitudinal axis of the injector; at that, in the pylons there made are channels, the inlet part of which is connected to the cavity of the blind tube, and the outlet part of which is connected to the annular cavity formed with the tubular housing and the blind tube. The blind tube is split-type and consists of a pylon part and a tip; at that, a jet nozzle is installed at their joint point. The 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. The tubular housing of the injector consists of two parts, inlet and outlet ones, which are tightly connected with a weld; at that, pylons are located in its inlet part. The tubular housing of the injector is equipped at least with one annular swelling.

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

4 cl, 4 dwg