Patent ID: 6782692
Filing Date: 2004-08-31
Classification: F02C,F05D,Y10T

Abstract:
A fuel metering unit in a turbomachine, the unit comprising an outer cylindrical sleeve having mounted therein a distributor cylinder in which a metering piston can move linearly under the action of a control element, said cylindrical sleeve having an inlet orifice for admitting fuel under pressure and at least one first outlet orifice and one second outlet orifice for injecting said fuel into a combustion chamber of said turbomachine, and said metering piston including an annular gap forming a distribution chamber for the fuel admitted via said inlet orifice and delivered via said at least one outlet orifice, wherein said distributor cylinder has a plurality of radial feed orifices for admitting fuel into said distribution chamber from said inlet orifice, and both at least one first metering orifice for expelling the fuel to said first outlet orifice, and at least one second metering orifice for expelling the fuel towards said second outlet orifice, said at least one first and at least one second metering orifices being separated by sealing means placed at the periphery of said distributor cylinder and being placed in a common transverse plane so as to ensure fuel flow continuity towards said combustion chamber during displacement of said metering piston.