公开(公告)号：US12281614B1

公开(公告)日：2025-04-22

申请号：US18753237

申请日：2024-06-25

Applicant: ROLLS-ROYCE plc

Inventor： Andrea Minelli ,  Benjamin J Keeler ,  Craig W Bemment ,  David M Beaven ,  Kevin R Mcnally

IPC: F02C7/14 ,  F02C7/36

Abstract: A method of operating a gas turbine engine including: an engine core with a turbine, compressor, a fuel combustor, and a core shaft connecting the turbine to the compressor; a fan; a gearbox that receives an input from the core shaft and outputs drive to the fan; an oil loop system arranged to supply oil to the gearbox; and a heat exchange system including: an air-oil heat exchanger through which the oil flows; a fuel-oil heat exchanger through which the oil and the fuel flow; a temperature sensor downstream of the fuel-oil heat exchanger; and a valve arranged to allow oil or air flow rate through at least one heat exchanger to be varied, the method including: determining if the fuel temperature has increased above a set threshold at cruise conditions; and in response, controlling the valve so as to change the flow rate through the heat exchanger.

公开(公告)号：US20250125736A1

公开(公告)日：2025-04-17

申请号：US18895743

申请日：2024-09-25

Applicant: ROLLS-ROYCE PLC

Inventor： David R TRAINER ,  Mark SWEET ,  Cezary P MAKULEC

IPC: H02M3/335 ,  B64D47/00 ,  H02J1/08 ,  H02M1/32 ,  H02M3/00

Abstract: A DC:DC converter includes: a DC:AC converter circuit having DC and AC sides; an AC:DC converter circuit having DC and sides; an AC link connecting the AC side of the DC:AC circuit and the AC side of the AC:DC converter circuit, the AC link including a transformer having a first winding connected to the AC side of the DC:AC converter circuit and a second winding connected to the AC side of the AC:DC converter; a capacitor; and a switch arrangement having a first state and a second state, wherein: in the first state, the capacitor is connected in series between the AC side of the DC:AC converter circuit and the first winding of the transformer; and in the second state, there is a current path between the AC side of the DC:AC converter circuit and the first winding of the transformer that does not include the capacitor.

公开(公告)号：US12276225B2

公开(公告)日：2025-04-15

申请号：US18184008

申请日：2023-03-15

Applicant: ROLLS-ROYCE plc

Inventor： Christopher A. Murray ,  Nicholas Howarth ,  Richard G. Stretton

IPC: F02C6/08 ,  B64D13/00 ,  B64D13/02 ,  B64D13/08 ,  B64D33/08 ,  F02C7/12 ,  F02C7/18 ,  F02C9/16 ,  F02C9/20 ,  F02C9/54

Abstract: There is provided a gas turbine engine comprising a blower system for supplying pressurised air to an airframe via an airframe port. The blower system comprises a compressor configured to receive air from a bypass duct or a core of the gas turbine engine and to discharge compressed air into a delivery line extending from the compressor to the airframe port. The blower system also comprises a heat exchanger configured to transfer heat from the compressed air to a coolant and a valve arrangement configured to switch between operation of the blower system in a baseline mode and a cooling mode, the valve arrangement being configured to: selectively divert the compressed air within the delivery line to the heat exchanger for operation in the cooling mode; and/or selectively provide the coolant to the heat exchanger for operation in the cooling mode.

公开(公告)号：US12275106B2

公开(公告)日：2025-04-15

申请号：US18525032

申请日：2023-11-30

Applicant: ROLLS-ROYCE plc

Inventor： Adam Thomas Clare

IPC: B24B19/14 ,  B23P6/00 ,  B24B27/00

Abstract: A repair system for repairing a surface of a workpiece includes a first tool configured to rotate in a first direction. The first tool contacts the surface of the workpiece during the rotation of the first tool in order to repair the surface of the workpiece. The repair system further includes a second tool configured to rotate in a second direction opposite to the first direction. The second tool contacts the surface of the workpiece during the rotation of the second tool in order to repair the surface of the workpiece. The repair system further includes a drive mechanism coupled to each of the first tool and the second tool.

公开(公告)号：US12270341B2

公开(公告)日：2025-04-08

申请号：US18379717

申请日：2023-10-13

Applicant: ROLLS-ROYCE PLC

Inventor： Chloe J Palmer ,  Jacopo Tacconi ,  Nicholas Grech

IPC: F02C7/224 ,  F02C3/22 ,  F02C7/14

Abstract: A gas turbine engine fuel system includes a fuel offtake configured to divert a portion of hydrogen fuel from a main fuel conduit, a burner configured to burn the portion of hydrogen fuel diverted from the main fuel conduit, a heat exchanger configured to transfer heat from exhaust gasses produced by the burner to hydrogen fuel in the main fuel conduit and a power recovery device configured to extract power from exhaust gasses of the burner downstream of the heat-exchanger.

公开(公告)号：US20250092823A1

公开(公告)日：2025-03-20

申请号：US18969412

申请日：2024-12-05

Applicant: ROLLS-ROYCE PLC

Inventor： Natalie C. WONG ,  Thomas S. BINNINGTON ,  David A. JONES ,  Daniel BLACKER

IPC: F02C7/04 ,  B64D27/10 ,  B64D27/20 ,  B64D33/02 ,  B64D33/04 ,  B64D33/08 ,  B64D33/10 ,  F01D9/06 ,  F02C7/08 ,  F02C7/12 ,  F02C7/14 ,  F02C7/18 ,  F02K3/06 ,  F02K3/075 ,  F02K3/115

Abstract: An aircraft comprises a machine body which encloses a turbofan gas turbine engine. The turbofan gas turbine engine includes a heat exchanger module, fan assembly, compressor module, turbine module, and exhaust module. The heat exchanger module communicates with the fan assembly by an inlet duct. The heat exchanger module includes first heat transfer elements that transfer heat energy from a first fluid within the transfer elements to an airflow passing over a surface of the transfer elements before entry of the airflow into a fan assembly inlet. The first fluid contained within transfer elements has a temperature, and the airflow passing over the transfer element surface has a temperature. The turbofan gas turbine engine further includes at least one second heat transfer element, with the or each second heat transfer element transfers heat energy from the first fluid to a second fluid.

公开(公告)号：US12253000B2

公开(公告)日：2025-03-18

申请号：US17795072

申请日：2021-01-18

Applicant: Rolls-Royce Deutschland Ltd & Co KG ,  Rolls-Royce plc

Inventor： David Williams ,  Stefan Menczykalski ,  Stephan Uhkötter ,  Uwe Kracht ,  Wolfram Kurz-Hardjosoekatmo

IPC: F01D25/20 ,  F01M1/20 ,  F02C7/06 ,  F02C7/32 ,  F02C7/36 ,  F15B1/26 ,  F16H57/04

Abstract: An oil system of a gas turbine engine, includes a first oil circuit and a second oil circuit. Via the oil circuits, oil is supplied to a hydraulic load of a transmission of the engine. Downstream of the load, in the region of a return of the transmission, oil is introduced into the oil circuits from the transmission. Upstream of the load, in the region of inlets, oil can be introduced into the transmission from the oil circuits. The second oil circuit includes an oil accumulator between the return and the inlet of the second oil circuit. The oil accumulator is configured such that, according to a feed pressure of the oil upstream of the inlet, oil is stored in the oil accumulator or oil stored in the oil accumulator is fed toward the inlet.

公开(公告)号：US12252996B2

公开(公告)日：2025-03-18

申请号：US18625842

申请日：2024-04-03

Applicant: ROLLS-ROYCE plc

Inventor： Andrew Parsley ,  Natalie C Wong

IPC: F01D21/14

Abstract: An apparatus and method for reducing a pressure differential across a turbine 19 of a gas turbine engine 10 during a shaft break event, comprises a pressure equalization apparatus 300, 400, 500, 600, 700 configured to introduce a pressurised fluid into a core airflow A at a region downstream of the turbine 19, wherein a rearward movement of the turbine 19 or a shaft 26 in a shaft break event directly actuates the pressure equalisation apparatus 300, 400, 500, 600, 700 to directly increase a local pressure at the downstream region 29 of the turbine 19 and thereby reduce the pressure differential across the turbine 19. The reduction in the pressure differential may result in a reduction in the acceleration of the turbine 19.

公开(公告)号：US20250084768A1

公开(公告)日：2025-03-13

申请号：US18808248

申请日：2024-08-19

Applicant: ROLLS-ROYCE plc

Inventor： Andrew MEKERESZ ,  Anastasios KOVANIS ,  John J. BOLGER ,  Benedict R PHELPS

IPC: F01D11/00

Abstract: An annulus filler of a gas turbine engine includes an outer lid including a leading edge, a trailing edge, a first longitudinal edge, a second longitudinal edge, and an outer radial surface. The outer radial surface includes a first nominal surface portion and a second nominal surface portion. The outer radial surface further includes a protruding surface portion extending radially outwardly from each of the first nominal surface portion and the second nominal surface portion and a recessed surface portion extending radially inwardly from each of the first nominal surface portion and the second nominal surface portion. Each of the protruding surface portion and the recessed surface portion is configured to redirect an air drawn through the gas turbine engine.

公开(公告)号：US20250075639A1

公开(公告)日：2025-03-06

申请号：US18794116

申请日：2024-08-05

Applicant: ROLLS-ROYCE plc

Inventor： Jack F. COLEBROOKE

IPC: F01D25/28

Abstract: A ducting arrangement for a gas turbine engine and a method of assembling such a ducting arrangement, wherein in the gas turbine engine includes an outer annular duct structure with an outer mount and an inner annular duct structure with an inner mount. The inner annular duct structure is configured to be received within the outer annular duct structure such that the inner mount and the outer mount are angularly aligned. In one aspect, the inner mount and the outer mount are coupled together by a tension tie to attach the outer annular duct structure to the inner annular duct structure, the tension tie being a cable or a wire. In another aspect, the inner mount and the outer mount are configured to be coupled together by a tension tie formed by a cable or a wire to attach the outer annular duct structure to the inner annular duct structure.