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. 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 outlet side is made so that it has stepped change of a flow passage. Stepped change of the flow passage of the tubular housing is made so that the flow passage of the above 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 external surface of the above housing and internal 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 external 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 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. 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. The inlet part of the above channels is connected to the cavity of the blind tube, and the outlet part 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; besides, at their interface point there installed is a jet nozzle, 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 tubular housing of the injector consists of two parts, inlet and outlet ones, which are tightly connected with a weld; pylons are located in its inlet part; the tubular housing is equipped at least with one annular swelling.

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

4 cl, 3 dwg