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

FIELD: engines and pumps.

SUBSTANCE: mixing head of the chamber includes a housing, and oxidiser supply unit, a hydrogen supply unit, a kerosene supply unit, coaxial jet injectors containing a tubular housing with the main axial channel, as well as a blind tube at least on one pylon, which is attached coaxially to the housing inside it and 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 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 one 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. In the above cavity there arranged are screw channels, on the side of axial inlet of the tubular housing there made is an adjustment element in the form of a chamfer; the tubular housing is split-type; on external surface of the blind tube arranged in the outlet part of the tubular housing there are pylons interacting at their outlet part with internal surface of the tubular housing. Longitudinal axes of pylons are installed at an angle to longitudinal axis of the injector; channels are made in the pylons, the inlet part of which is connected to the blind tube cavity, and the outlet part of which is connected to the annular cavity formed with the tubular housing and the blind tube. 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 external surface of the tubular housing, and blind tube is split-type and consists of a pylon part and a tip; at that: at their interface point there installed is a jet nozzle, injector blind tube 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, inside the tubular housing there made at the point of stepped expansion is a branch pipe located coaxially between the housing and the blind tube; at that, an annular end pocket, the open side of which faces the housing outlet, is formed between the branch pipe and the tubular housing. Axial holes are spread from external surface of the injector till intersection with the annular end pocket; tubular housing of the injector is made of two parts, inlet and outlet ones, which are tightly connected through a weld. 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 at the injector operation both as three-component and two-component one.

5 cl, 4 dwg