中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

4655 records (took 0.068 seconds)

    SEAL FOR A GAS TURBINE ENGINE
    181.
    发明申请
    SEAL FOR A GAS TURBINE ENGINE 有权

    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.

    JOURNAL BEARING
    183.
    发明申请
    JOURNAL BEARING 有权

    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.

    Gas turbine engine cooling system
    184.
    发明授权
    Gas turbine engine cooling system 有权

    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.

    Multi-variable fleet optimisation method and system
    186.
    发明授权
    Multi-variable fleet optimisation method and system 有权

    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.

    Shaft monitoring system
    187.
    发明授权
    Shaft monitoring system 有权

    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.

    RECTIFIER
    188.
    发明申请
    RECTIFIER 有权

    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.

    LEAN BURN INJECTOR WITH SUPPLY LINE SWITCHING
    189.
    发明申请
    LEAN BURN INJECTOR WITH SUPPLY LINE SWITCHING 有权

    公开(公告)号：US20230015929A1

    公开(公告)日：2023-01-19

    申请号：US17856575

    申请日：2022-07-01

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

    Inventor： Michael R SMITH ,  Imon-Kalyan BAGCHI

    IPC: F23R3/28

    Abstract: A lean burn fuel spray nozzle comprises: a lean burn fuel spray nozzle head comprising a pilot fuel injector with a pilot fuel injector outlet and a main fuel injector with a main fuel injector outlet; a feed arm adapted to feed pilot fuel from pilots pipework to the pilot fuel injector through a pilot fuel circuit and feed main fuel from mains pipework to the main fuel injector through a main fuel circuit; and a switching device comprising a switching valve adapted to switch between a Main On position, wherein the main fuel injector is in fluid communication with the mains pipework such that main fuel is sprayed through the main fuel injector outlet, and a Main Off position, wherein the main fuel injector outlet is not in fluid communication with the mains pipework such that main fuel is prevented to flow through the main fuel injector.

Patent Agency Ranking