COAXIAL SPRAY INJECTOR Russian patent published in 2013 - IPC F02K9/52 

FIELD: engines and pumps.

SUBSTANCE: coaxial spray injector includes a tubular housing with the main axial channel, which has an axial inlet and outlet, 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 outer surface of the injector to the axial duct in the blind tube on the side of its blind end. The blind tube duct is formed on the outlet side with its blind axial duct and on the inlet side with an inlet through hole in the pylon. The main axial duct of the tubular housing on the outlet side is made so that it has stepped change of a flow passage. Stepped change of the flow passage is made so that the flow passage of the housing reduces 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 above housing and inner surface of the sleeve. 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 their outlet part to inner surface of the tubular housing; at that, longitudinal axes of the above pylons are installed at an angle to longitudinal axis of the injector. Ducts are made in the pylons, 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. Axes of ducts in the pylons are located opposite to the direction of axes of screw channels in annular cavity between sleeve and external 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 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 blind tube is fixed inside the housing 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; injector is split-type and consists of two parts, inlet and outlet ones, which are tightly attached with a weld; the tubular housing is equipped at least with one annular swelling.

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

4 cl, 3 dwg