US 10,890,117 B2
Fluid supply system for turbine engine, including an adjustable flow pump and a fluid metering device
Sébastien Christophe Chalaud, Montreuil (FR); and Pierre Charles Mouton, Grigny (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
Filed on Jun. 22, 2018, as Appl. No. 16/15,435.
Claims priority of application No. 17 55904 (FR), filed on Jun. 27, 2017.
Prior Publication US 2018/0372006 A1, Dec. 27, 2018
Int. Cl. F02C 9/30 (2006.01); F02C 7/22 (2006.01); F02C 9/26 (2006.01); F02C 9/46 (2006.01); F02C 9/28 (2006.01); F02C 7/224 (2006.01); F02C 7/232 (2006.01); F02C 9/36 (2006.01); F02C 7/236 (2006.01); F02C 9/38 (2006.01)
CPC F02C 9/30 (2013.01) [F02C 7/22 (2013.01); F02C 7/224 (2013.01); F02C 7/232 (2013.01); F02C 7/236 (2013.01); F02C 9/263 (2013.01); F02C 9/28 (2013.01); F02C 9/36 (2013.01); F02C 9/38 (2013.01); F02C 9/46 (2013.01); F05D 2220/323 (2013.01); F05D 2270/09 (2013.01); F05D 2270/303 (2013.01); F05D 2270/3015 (2013.01); F05D 2270/54 (2013.01)] 12 Claims
OG exemplary drawing
 
11. A regulation method for regulating the flow rate of fluid in a fluid supply system for aircraft turbine engine, including:
an electronic regulation system,
a main circuit including:
a high pressure volumetric pump with adjustable flow rate, wherein the flow rate of the high pressure volumetric pump is commanded by the electronic regulation system of the turbine engine, and
a fluid metering device which is located downstream of the high pressure volumetric pump,
wherein the supply system further includes:
a fluid bypass circuit which is connected to the main circuit by an input which is situated downstream of the high pressure pump and by an output which is situated upstream of the high pressure volumetric pump, and
a control valve which is arranged in the bypass circuit, wherein the control valve is connected to the main circuit both upstream and downstream of the metering device so as to be subjected to a pressure difference between an input pressure upstream of the metering device and an output pressure downstream of the metering device,
wherein the control valve includes a variable position obturator, wherein the position of the obturator of the control valve depends of said pressure difference between the input pressure and the output pressure,wherein the control valve is configured to vary the flow rate of fluid in the bypass circuit by the position of the obturator, so as to regulate said pressure difference between the input pressure and the output pressure in order to maintain said pressure difference substantially equal to a predetermined value,
wherein the control valve includes a sensor for measuring the position of the obturator, wherein the sensor is connected to the electronic regulation system, so that the electronic regulation system is able to elaborate the command of the flow rate of the high pressure volumetric pump by comparing the measured position of the obturator with a position set-point of the obturator corresponding to a fluid flow rate set-point in the bypass circuit, wherein said fluid flow rate set-point is capable of taking different values determined depending of a flight condition of the aircraft and/or depending of a measured fluid temperature, wherein the electronic regulation system is configured to command the flow rate of the high pressure pump, so that the position of the obturator corresponds to a position set-point which can vary between an extreme opening position and an extreme closing position,
wherein the method includes a step of measuring the position of the obturator by the sensor,
wherein the measured position of the obturator is used by the electronic regulation system to calculate a corrected value of the pressure difference between the input pressure and the output pressure in order to compensate a droop error of the control valve.