MULTIPLE-POINT INJECTOR FOR TURBOMACHINE Russian patent published in 2013 - IPC F02C7/22 

FIELD: machine building.

SUBSTANCE: fuel injector of multiple-point type, which is intended for installation in combustion chamber spray system, includes a fuel supply post, the first and the second shells, at least one stage of swirlers, which is inserted into the opening of the first shell housing, and a fuel nozzle. The first shell includes a part forming the connection, into which the post end is placed, and a part forming the housing opened from inside and having outer diameter and fuel circulation channels drilled internally and interconnected with the fuel supply post. Fuel nozzle is placed in the part forming a bushing of the stage of swirlers for spray of fuel supplied from inside the pilot circulation channels of the first shell towards the spray system axis. The second shell includes a part forming an inwardly open housing having outer diameter, at the periphery of which there drilled are multiple-point spray channels for fuel spray in the direction of the spray system periphery. They are inserted one into another in the injector of the housing of the first and the second shells so that their internal openings and outer diameters are at least partially mutually overlapped, thus restricting the full volume containing at least three concentric deflectors interconnected with circulation channels. Central deflector is opened to multiple-point spray channels, and the rest ones, which are peripheral, are made so that fuel can circulate around central deflector to cool down the fuel fed to the multiple-point spray channels, and then, to supply it to the nozzle. Deflectors are solid, and each of them is interconnected at least with one individual circulation channel. Peripheral deflectors are opened to the fuel inlet chamber located in the zone diametrically opposite to circulation channels and interconnected with the nozzle so that uniform feeding and cooling of the injector can be obtained.

EFFECT: invention allows achieving uniform cooling of the fuel stagnated inside the multiple-point circuit.

12 cl, 10 dwg