US 11,815,034 B2
Circuit for supplying fuel to a turbomachine
Huguette De Wergifosse, Moissy-Cramayel (FR); Loïc Pora, Moissy-Cramayel (FR); and Eric De Wergifosse, Blagnac (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 16/481,009
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jan. 30, 2018, PCT No. PCT/FR2018/050203
§ 371(c)(1), (2) Date Jul. 25, 2019,
PCT Pub. No. WO2018/138456, PCT Pub. Date Aug. 2, 2018.
Claims priority of application No. 1750748 (FR), filed on Jan. 30, 2017.
Prior Publication US 2019/0390606 A1, Dec. 26, 2019
Int. Cl. F02C 9/30 (2006.01); F02C 7/22 (2006.01)
CPC F02C 9/30 (2013.01) [F02C 7/22 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A fuel supply system for a turbomachine, comprising a fuel circuit comprising:
a pump positioned to send fuel into said fuel circuit at a fuel flow rate which is an increasing function of a rotational speed of a shaft of said pump, said fuel flow rate being provided to a combustion chamber;
a hydromechanical group positioned to control a fuel outlet to the combustion chamber;
a drive device positioned to drive the shaft of the pump with a controllable rotational speed;
a branch comprising actuators for controlling a variable geometry of the turbomachine, said branch starting with a branch connection on a derivation positioned between an outlet of the pump and said hydromechanical group;
the fuel supply system regulating the fuel flow rate to said combustion chamber from a flow rate set point value, wherein said the fuel supply system further comprises:
a flow rate sensor positioned in the hydromechanical group;
a flow rate loop positioned to determine a pressure set point value at the outlet of the pump as a function of the flow rate set point value and a measurement provided by said flow rate sensor;
a pressure sensor positioned in the fuel circuit at the outlet of the pump; and
a pressure loop arranged to control the controllable rotational speed of the drive device from a difference between a pressure measurement provided by the pressure sensor and said pressure set point value determined by the flow rate loop, to quickly adapt the fuel flow rate provided by the pump to the flow rate set point value,
wherein the pressure loop is distinct from the flow rate loop, and wherein the pump is a volumetric pump.