Patent ID: 8186163

Claim:
A multipoint fuel injector, intended to be mounted in an injection system of a combustion chamber, comprising: an arm for supplying fuel; a first ferrule comprising a part forming a connection in which is housed at one end of the arm and a part forming a body which is open internally, the body having an external diameter, and perforated internally with channels for circulating fuel communicating with the arm; at least one swirler stage interlocked in the body of the first ferrule; a fuel injection nozzle housed in a part forming a hub of the at least one swirler stage to inject fuel originating from inside of a pilot circulation channel of the first ferrule toward a central axis of the injection system; a second ferrule comprising a part forming a body which is open internally, the body having an external diameter and of which a periphery is perforated with multipoint injection channels to inject fuel toward a periphery of the injection system, an injector in which bodies of the first and second ferrules are interlocked such that internal openings and external diameters of the first and second ferrules mutually overlap at least partially defining a hollow volume, the hollow volume comprising three concentric baffles communicating with circulation channels, of which a central baffle opens out onto the multipoint injection channels and internal and external peripheral baffles are adapted to circulate fuel around the central baffle in order to cool the fuel supplying the multipoint injection channels, and then to supply the injection nozzle, wherein the central, internal peripheral and external peripheral baffles are continuous and each communicate with at least one separate circulation channel, the internal and external peripheral baffles opening out into a fuel admission chamber arranged in a zone diametrically opposing the circulation channels and which communicates with the injection nozzle in order to achieve uniform supply and cooling of the injector.