公开(公告)号：US20230093834A1

公开(公告)日：2023-03-30

申请号：US17931152

申请日：2022-09-12

Applicant: ROLLS-ROYCE plc

Inventor： Dharun VADUGAPPATTY SRINIVASAN ,  Sridhar IDAPALAPATI

IPC: F01D5/00 ,  F01D5/28 ,  B29C73/10 ,  B29C73/26

Abstract: A method of repairing a composite blade. The composite blade includes a metal work bonded to a composite part through an adhesive layer. The method includes determining a locally damaged portion of the metal work, and removing a bullet portion corresponding to the locally damaged portion. The method further includes detaching, debonding, and removing a first wing portion from the composite part to obtain a first exposed surface portion. The method further includes detaching, debonding, and removing a second wing portion from the composite part to obtain a second exposed surface portion. The method further includes reconditioning the first and second exposed surface portions to obtain first and second reconditioned surface portions, respectively, and applying first and second adhesive layers to the first and second reconditioned surface portions respectively. The method further includes bonding a metal work patch to the first and second adhesive layers.

公开(公告)号：US11603993B2

公开(公告)日：2023-03-14

申请号：US17848798

申请日：2022-06-24

Applicant: ROLLS-ROYCE plc ,  ROLLS-ROYCE DEUTSCHLAND LTD & CO KG

Inventor： Luca Tentorio ,  Imon-Kalyan Bagchi

IPC: F23R3/34 ,  F23R3/14 ,  F02C7/36

Abstract: A lean burn combustor includes a plurality of lean burn fuel injectors, each including a fuel feed arm and a lean burn fuel injector head with a lean burn fuel injector head tip, wherein the lean burn fuel injector head tip has a lean burn fuel injector head tip diameter, the lean burn fuel injector head including a pilot fuel injector and a main fuel injector, the main fuel injector being arranged coaxially and radially outwards of the pilot fuel injector; and a combustor chamber extending along an axial direction for a length and including a radially inner annular wall, a radially outer annular wall, and a meter panel defining the size and shape of the combustor chamber, wherein the combustor chamber includes primary and secondary combustion zones. A ratio of the combustor chamber length to the lean burn fuel injector head tip diameter is less than 5.

公开(公告)号：US20230066032A1

公开(公告)日：2023-03-02

申请号：US17822506

申请日：2022-08-26

Applicant: ROLLS-ROYCE plc

Inventor： Tony L. WIDDOWSON ,  Oliver C. TAYLOR-TIBBOTT

IPC: F01D11/00

Abstract: A seal arrangement configured to provide an airtight and fluid-tight seal between a first component and a second component, having a first pressure boundary seal disposable at least partially within the gap between the first component and the second component, the first pressure boundary seal being fixable to one of the first or second components to create an airtight seal with the other of the first or second component, the seal arrangement also having a first flame deflector that is configured to bridge across and cover the gap between the first component and the second component so as to create a fluid-tight seal over the gap between the first component and the second component, where the first flame deflector has a convex external shape so as to prevent any fluid impinging upon the first flame deflector from pooling on the first pressure boundary seal.

公开(公告)号：US11585278B1

公开(公告)日：2023-02-21

申请号：US17853144

申请日：2022-06-29

Applicant: ROLLS-ROYCE plc

Inventor： Peter Swann ,  David M Beaven ,  Craig W Bemment ,  Alastair G Hobday ,  Benjamin J Keeler ,  Christopher P Madden ,  Martin K Yates

IPC: G01N21/35 ,  F02C9/00 ,  B64D27/10 ,  B64D47/00 ,  G01N33/28 ,  G01N21/64 ,  G01N21/33 ,  G01N21/3577 ,  B64D37/00

Abstract: A method of determining one or more fuel characteristics of an aviation fuel for powering a gas turbine engine of an aircraft includes: measuring one or more trace substance parameters of the fuel, the one or more trace substance parameters each associated with a respective trace substance in the fuel; and determining one or more fuel characteristics of the fuel based on the one or more trace substance parameters. Further, a fuel characteristic determination system, a method of operating an aircraft, and an aircraft.

公开(公告)号：US20230044167A1

公开(公告)日：2023-02-09

申请号：US17814019

申请日：2022-07-21

Applicant: ROLLS-ROYCE plc

Inventor： Fiona HALLIDAY ,  Mark SPRUCE

IPC: F16H57/08 ,  F16C17/02

Abstract: A journal bearing comprising a first component and a second component, the first and second components being arranged to rotate relative to one another in normal use. The first component comprises a first body, a first layer forming a functional surface facing the second component, and a first subsurface layer between the body and the layer. The first subsurface layer is formed of a material having a first coefficient of thermal expansion in the radial direction, and the first body is formed of a material having a second coefficient of thermal expansion in the radial direction. The first coefficient of thermal expansion is lower than the second coefficient of thermal expansion.

公开(公告)号：US11572834B2

公开(公告)日：2023-02-07

申请号：US17152139

申请日：2021-01-19

Applicant: Rolls-Royce plc

Inventor： Manuel Diaz Brito

IPC: F02C7/18 ,  F02K3/04

Abstract: Gas turbine engine including a nacelle and an engine core within the nacelle. The engine core defines a principal rotational axis along its length. The engine core and nacelle define a bypass passage therebetween. The gas turbine engine further includes a cooling system including a cooling duct, which duct defines an inlet for receiving bypass air from the bypass passage at an upstream location and an outlet for discharging the bypass air at a downstream location. The cooling duct extends, relative to the principal axis, axially and circumferentially around a section of the engine core. The cooling duct comprises: first portion that extends at least axially relative to the principal rotational axis; second portion downstream of the first portion that extends circumferentially around the engine core relative to the principal rotational axis; and third portion downstream of second portion that extends at least axially relative to the principal rotational axis.

公开(公告)号：US11572182B2

公开(公告)日：2023-02-07

申请号：US15984555

申请日：2018-05-21

Applicant: ROLLS-ROYCE plc

Inventor： Ahmed My Razak

IPC: B64D27/24 ,  F04D25/06 ,  F01D15/10 ,  B64D33/00 ,  H02K5/124 ,  B64D27/10 ,  B64D27/02 ,  F04C2/344

Abstract: An electric machine (101) for use in an aircraft is shown. The electric machine comprises a casing (104) containing electromechanical components, a shaft (106) which extends outside of the casing, a seal (107) to seal the casing around the shaft, and a depressurisation system (102) configured to depressurise the casing below an external pressure to prevent electrical breakdown within gas in the casing.

公开(公告)号：US11567459B2

公开(公告)日：2023-01-31

申请号：US16580463

申请日：2019-09-24

Applicant: ROLLS-ROYCE plc

Inventor： Derek S Wall ,  Chana T Goldberg ,  Panagiotis Laskaridis ,  Devaiah K Nalianda

IPC: G05B13/02 ,  F02C6/20 ,  F02C9/28 ,  G08G5/00

Abstract: A method of optimizing the operation of a fleet of gas turbine engines is provided. The method comprises the steps of: (a) measuring respective values for plural control actuator settings within each of the gas turbine engines; (b) deriving, based on data external to the operation of the gas turbine engines, a desired performance modification of the gas turbine engines; (c) determining, based on the measured control actuator settings, one or more respective trim signals for varying selected of the control actuator settings to achieve the desired performance modification; and (d) transmitting the trim signals to respective electronic controllers of the engines to vary the selected control actuator settings accordingly.

公开(公告)号：US11561235B2

公开(公告)日：2023-01-24

申请号：US16690650

申请日：2019-11-21

Applicant: ROLLS-ROYCE PLC

Inventor： Robert N Shepherd ,  Kevin E Gapper

IPC: G01P3/48 ,  G01P1/02 ,  G01P3/488 ,  F01D17/06

Abstract: A system for monitoring the axial position of a rotating shaft includes a phonic wheel mounted coaxially to the shaft for rotation with a circumferential row of teeth. The system includes a sensor configured to detect the passage of the teeth by generating an alternating measurement signal. First and second portions of the teeth alternate around the row and contribute respective first and second components to the alternating measurement signal. The first portion of teeth vary in height in an axial direction of the wheel such that the relative height of the first and second portions varies with axial distance across the phonic wheel, and the sensor is positioned relative to the phonic wheel such that axial displacement of the shaft causes the signal to vary the first component's amplitude relative to the second component's amplitude due to the height variation, to monitor the axial position of the shaft.

公开(公告)号：US20230018916A1

公开(公告)日：2023-01-19

申请号：US17811740

申请日：2022-07-11

Applicant: ROLLS-ROYCE plc

Inventor： David R. TRAINER ,  Ellis F H CHONG ,  Jonathan M. STEVENS

IPC: H02M7/219 ,  H02P6/182 ,  H02M3/335

Abstract: An AC to DC conversion device has first and second AC input terminals arranged to be coupled respectively to first and second terminals of a phase of an AC current generator, an H-bridge rectification device comprising two pairs of diodes, each pair being coupled to a respective one of the AC terminals to produce a DC output comprising a rectified back EMF waveform, and a waveform generator. The waveform generator comprises an output coupled to the DC output of the H-bridge rectification device, and is configured to input a unidirectional waveform to the DC output having the same magnitude and fundamental frequency as the rectified back EMF, phase shifted by a predetermined angle relative to the rectified back EMF waveform.