公开(公告)号：US20180372322A1

公开(公告)日：2018-12-27

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 ,  F02C7/22 ,  F02C7/228 ,  F02C7/232 ,  F02C9/26 ,  F02C7/14

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：US20180372321A1

公开(公告)日：2018-12-27

申请号：US16011865

申请日：2018-06-19

Applicant: ROLLS-ROYCE PLC

Inventor： Martin K. YATES ,  Daniel J. BICKLEY

IPC: F23R3/34 ,  F23R3/28 ,  F23K5/14 ,  F23K5/06 ,  F02C9/34 ,  F02C7/22 ,  F02C7/228 ,  F02C7/232 ,  F02C9/26 ,  F02C7/14

Abstract: A combustion staging system has: a splitter; pilot and mains fuel manifolds; mains flow control valves; and fuel servo line. Each mains flow control valve has a chamber containing a piston, the chamber to a piston mains side fed by the mains fuel manifold, and the chamber to a piston servo side fed by the servo line. The piston has an open pilot-and-mains position allowing flow from the chamber mains side to the respective injector mains discharge orifice. The piston prevents flow from the chamber mains side. The piston is movable under a pressure change in the servo line relative to the mains fuel manifold. The system has a servo pump and a hydraulic motor driving it. The servo pump changes fuel pressure. Motive power for the hydraulic motor is fuel diverted from a fuel pump high pressure output, the motor returning the diverted fuel to a low pressure input.

公开(公告)号：US20180372320A1

公开(公告)日：2018-12-27

申请号：US16011741

申请日：2018-06-19

Applicant: ROLLS-ROYCE PLC

Inventor： Daniel J. BICKLEY

IPC: F23R3/34 ,  F02C7/22 ,  F02C7/232 ,  F02C9/26 ,  F02C7/14

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.

公开(公告)号：US20210018177A1

公开(公告)日：2021-01-21

申请号：US16916589

申请日：2020-06-30

Applicant: ROLLS-ROYCE plc

Inventor： Michael GRIFFITHS ,  Daniel J. BICKLEY

IPC: F23R3/34 ,  F02C7/36 ,  F02C7/228 ,  F02C7/232 ,  F02C9/26

Abstract: A combustion staging system for fuel injectors of a multi-stage combustor of a gas turbine engine. The system includes plural fuel injectors, each having respective pilot and mains injection stages. It further includes a splitting unit which, to perform staging control of the combustor, receives a metered fuel flow and, for pilot and mains operation, controllably splits the received fuel flow into a pilot flow for injecting at the pilot stages of the injectors and a mains flow for injecting at the mains stages of the injectors, and for pilot-only operation, controllably splits the received fuel flow into a first part of the pilot flow for injecting at the pilot stages of a first portion of the injectors and a second part of the pilot flow for injecting at the pilot stages of a second portion of the injectors.

公开(公告)号：US20180163630A1

公开(公告)日：2018-06-14

申请号：US15821317

申请日：2017-11-22

Applicant: ROLLS-ROYCE PLC

Inventor： Daniel J. BICKLEY

IPC: F02C7/228 ,  F02C9/34 ,  F02C9/26 ,  F02C7/232 ,  F23R3/34 ,  F02C7/22

CPC classification number: F02C7/228 ,  F02C7/222 ,  F02C7/232 ,  F02C9/263 ,  F02C9/34 ,  F05D2220/323 ,  F05D2240/35 ,  F05D2270/62 ,  F05D2270/64 ,  F05D2270/66 ,  F23K5/06 ,  F23R3/34 ,  F23R3/343 ,  F23R3/346 ,  Y02T50/671

Abstract: A fuel supply system includes a metering and splitting arrangement receiving a fuel flow and controllably meters and splits the received fuel flow into metered pilot and mains flows for injecting at injector pilot and mains fuel discharge orifices to perform combustor staging control. The system includes mains isolation valves and a mains fuel distribution pipework has fuel lines connected to one of the orifices and extending therefrom to a respective one of the valves. Each valve has a closed position for removing the mains fuel from its injector through its line when the mains distribution pipework is deselected for pilot-only operation, and isolates its line from the metering and splitting arrangement. Each valve has an open position for refilling its injector with mains fuel through its line when the mains distribution pipework is selected for pilot and mains operation, and reconnects its line to the metering and splitting arrangement.