FUEL FEED SYSTEM FOR GAS TURBINE ENGINE WITH AUGMENTER Russian patent published in 2014 - IPC F02C7/22 

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises electrically driven high-pressure fuel feed pump and mechanically driven two-stage high-pressure rotary pump with fuel extraction behind each stage, both being arranged in main line. This system incorporates also a two-position device to communicate said pumps with the main combustion chamber and augmenter via proportioners. High-pressure pump electric drive, said two-position devices and proportioners are connected with control system. Control system controls fuel feed in total fuel feed to engine to change said two-position device over to position whereat electrically drive high-pressure pump is communicated with proportioners of said main chamber and augmenter in case total fuel feed is lower than preset one. Or in case it is higher than preset magnitude, to position whereat two-stage high-pressure rotary pump inlet is open and first-stage outlet is connected to proportioner of fuel feed to augmenter and second-stage outlet is connected to main combustion chamber proportioner. High-pressure pump drive motor allows fuel control in motor winding current strength to maintain pressure difference at said pump.

EFFECT: power savings, lower heating of fuel in pumps, optimised weight of fuel system.

3 cl, 1 dwg