-
公开(公告)号：US10830444B2
公开(公告)日：2020-11-10
申请号：US16012054
申请日：2018-06-19
Applicant: ROLLS-ROYCE PLC
Inventor： Daniel J Bickley
IPC: F23R3/34 , F23R3/28 , F23K5/14 , F23K5/06 , F02C9/34 , F02C7/228 , F02C7/232 , F02C9/26 , F02C7/14 , F02C7/22
Abstract: A combustion staging system is provided for fuel injectors of a multi-stage combustor of a gas turbine engine. The system has a splitting unit which receives a metered total fuel flow and controllably splits the metered total fuel flow into out-going pilot and mains fuel flows to perform pilot-only and pilot-and-mains staging control of the combustor. The system further has pilot and mains fuel manifolds which respectively receive the pilot and mains fuel flows, the mains fuel manifold being split into a primary line and a servo line such that each line receives a respective portion of the mains fuel flow. The system further has a plurality of mains flow control valves which distribute the mains fuel flow from the mains fuel manifold to mains discharge orifices of respective injectors of the combustor, both the primary line and the servo line extending to the mains flow control valves before reuniting. The system further has a servo pump operable to change the pressure in the servo line relative to the pressure in the primary line. Each mains flow control valve has a chamber containing a movable piston, the chamber to a primary side of the piston being fed by the primary line, and the chamber to a servo side of the piston being fed by the servo line. The piston is biased towards a closed pilot-only position which prevents flow out of the primary side of the chamber to the mains discharge orifice of the respective injector. The piston is movable under an increase in pressure in the servo line relative to the primary line to an open pilot-and-mains position which allows flow out of the primary side of the chamber to the mains discharge orifice of the respective injector.
-
公开(公告)号：US11891959B2
公开(公告)日：2024-02-06
申请号：US17983874
申请日：2022-11-09
Applicant: ROLLS-ROYCE plc
Inventor： Daniel J Bickley
CPC classification number: F02C9/263 , F02C7/232 , F02C9/46 , F05D2220/323 , F05D2240/35 , F05D2270/05 , F05D2270/07
Abstract: A fuel control system for a gas turbine engine includes a fuel metering valve, a pressure raising and shut-off valve (PRSOV), and a shutoff effector including a first stage unit that is electrically powered and a second stage unit that is controlled by the first stage unit. The second stage unit actuates a valve member of the PRSOV between an open position that allows supply of a fuel to burners of the gas turbine engine and a closed position that prevents supply of the fuel to the burners. Upon loss of electrical power to the first stage unit during operation of the gas turbine engine, the first stage unit is configured to: control the second stage unit to actuate the valve member of the PRSOV to the closed position after a predetermined time duration; or retain the valve member of the PRSOV in the open position.
-
公开(公告)号：US10982858B2
公开(公告)日：2021-04-20
申请号：US16011741
申请日：2018-06-19
Applicant: ROLLS-ROYCE PLC
Inventor： Daniel J Bickley
Abstract: A combustion staging system is provided for fuel injectors of a multi-stage combustor of a gas turbine engine. The system has a splitting unit which receives a metered total fuel flow and controllably splits the metered total fuel flow into out-going pilot and mains fuel flows to perform pilot-only and pilot-and-mains staging control of the combustor. The splitting unit includes a metering valve and a spill valve, a first portion of the total metered fuel flow received by the splitting unit being an inflow to the metering valve and a second portion of the total metered fuel flow received by the splitting unit being an inflow to the spill valve. The metering valve is configured to controllably determine a fuel flow rate of a metered outflow formed from the first portion of the total metered fuel flow.
-
-
Search Results
3
records
(took 0.008 seconds)
