公开(公告)号：US11549687B2

公开(公告)日：2023-01-10

申请号：US16916589

申请日：2020-06-30

Applicant: ROLLS-ROYCE plc

Inventor： Michael Griffiths ,  Daniel J. Bickley

IPC: F23R3/34 ,  F02C7/228 ,  F02C7/232 ,  F02C7/36 ,  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：US11655727B1

公开(公告)日：2023-05-23

申请号：US17652137

申请日：2022-02-23

Applicant: Rolls-Royce plc

Inventor： Daniel J. Bickley

IPC: F01B25/02 ,  F01D17/16 ,  F15B13/04 ,  F15B9/09 ,  F15B20/00 ,  F15B15/14

CPC classification number: F01D17/16 ,  F15B9/09 ,  F15B13/0402 ,  F15B15/149 ,  F15B20/002 ,  F05D2260/32 ,  F05D2260/57

Abstract: In general, techniques are described regarding a rotary servo for actuators. A servo assembly includes a cylindrical outer sleeve including ports, a cylindrical outer spool annularly disposed within the cylindrical outer sleeve, a stepper motor mechanically coupled to the cylindrical outer spool, and an actuator mechanically coupled to compressor variable geometry that controls compression provided by a compressor. The cylindrical outer spool includes channels configured to provide fluidic interconnection between the ports and a cylindrical inner spool, where the cylindrical inner spool is annularly disposed within the cylindrical outer spool, and the cylindrical inner spool includes grooves configured to provide fluidic interconnection through the channels of the cylindrical outer sleeve. The stepper motor is configured to rotate the cylindrical outer spool within the cylindrical outer sleeve to deliver a fluid to and thereby actuate the actuator to control the compressor variable geometry.

公开(公告)号：US11204168B2

公开(公告)日：2021-12-21

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 ,  F02C7/228 ,  F02C7/232 ,  F02C9/26 ,  F02C7/14 ,  F02C7/22 ,  F02C7/236

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：US20180163966A1

公开(公告)日：2018-06-14

申请号：US15821268

申请日：2017-11-22

Applicant: ROLLS-ROYCE PLC

Inventor： David I. Jones ,  Michael Whiteman ,  Daniel J. Bickley

IPC: F23R3/28 ,  F02C7/22 ,  F02C7/236 ,  F02C9/26

CPC classification number: F23R3/283 ,  F02C7/222 ,  F02C7/232 ,  F02C7/236 ,  F02C9/26 ,  F02C9/263 ,  F02C9/34 ,  F05D2260/602 ,  F05D2270/301 ,  F23D2209/30 ,  F23K5/06 ,  F23K2203/105 ,  F23R3/34 ,  Y02T50/671

Abstract: A fuel supply system for fuel injectors of a multi-stage combustor of a gas turbine engine. The fuel supply system includes a metering and splitting arrangement which receives a total fuel flow and controllably meters and splits the received total fuel flow into metered pilot and mains flows. The fuel supply system further includes a de-priming sub-system, one or more fuel lines of a mains fuel distribution pipework being fluidly connected to the mains fuel discharge orifices and extending to the de-priming sub-system, and the de-priming sub-system being configured to remove the mains fuel from the injectors. A re-priming sub-system, the one or more fuel lines of the mains fuel distribution pipework also extending to the re-priming sub-system, and the re-priming sub-system being configured to refill the injectors with mains fuel through the one or more fuel lines when the mains distribution pipework is selected for pilot and mains operation.