公开(公告)号：US11542021B2

公开(公告)日：2023-01-03

申请号：US17197708

申请日：2021-03-10

Applicant: ROLLS-ROYCE PLC

Inventor： Richard Harwood ,  Kalyani G. Menon ,  Joseph Palmer ,  Ivan Popovic

IPC: H02P23/14 ,  H02P5/74 ,  B64D27/24 ,  B63H21/20 ,  B61C5/00 ,  B63H21/17 ,  B64D27/02 ,  H02J7/34 ,  H02J3/02 ,  H02J50/10 ,  H02J3/00 ,  H02J3/46 ,  B64D27/10

Abstract: An aircraft propulsion system includes at least first and second electrical generators, each being configured to provide electrical power to a respective first and second AC electrical network. The system further comprises at least first and second AC electrical motors directly electrically coupled to a respective AC network and coupled to a respective propulsor, and a DC electrical network electrically coupled to the first and second AC networks via respective first and second AC to DC converters, and to a further electrical motor, the further electrical motor being coupled to a propulsor.

公开(公告)号：US20220411954A1

公开(公告)日：2022-12-29

申请号：US17842447

申请日：2022-06-16

Applicant: ROLLS-ROYCE plc

Inventor： Daniel CLARK

IPC: C25F3/16 ,  B22F10/62 ,  B33Y40/20

Abstract: A method of electropolishing an internal passageway of a component, wherein the passageway has an inlet and an outlet; including: providing an electrode assembly including a flexible electrode, a shuttle and a guide cable extending between the flexible electrode and the shuttle; inserting the shuttle into the inlet; causing fluid to flow through the passageway to transport the shuttle through the passageway from the inlet towards the outlet; pulling the guide cable through the passageway to position the electrode in the passageway adjacent to a region of the passageway to be polished; and electropolishing the passageway using the electrode while moving the electrode within the passageway. Also, an electrode assembly for electropolishing an internal passageway of a component, including: a flexible electrode, a shuttle, and a guide cable extending between the flexible electrode and the shuttle.

公开(公告)号：US11530651B2

公开(公告)日：2022-12-20

申请号：US17189650

申请日：2021-03-02

Applicant: ROLLS-ROYCE plc

Inventor： Christopher P. Madden ,  Peter Swann

IPC: F02C9/28 ,  F23R3/34 ,  F02C9/26 ,  F02C9/40 ,  F02C3/30

Abstract: A gas turbine engine for an aircraft. The gas turbine comprises a staged combustion system having pilot injectors and main injectors, a fuel metering system configured to control fuel flow to the pilot injectors and the main injectors, and a fuel system controller. The controller is configured to identify an atmospheric condition, determine a ratio of pilot fuel flow rate for the pilot injectors to main fuel flow rate for the main injectors in response to the atmospheric condition, and inject fuel by the pilot injectors and the main injectors in accordance with said ratio to control an index of soot emissions caused by combustion of fuel therein.

公开(公告)号：US11527228B2

公开(公告)日：2022-12-13

申请号：US16266411

申请日：2019-02-04

Applicant: ROLLS-ROYCE plc

Inventor： Richard Peace ,  Oliver C. Taylor-Tibbott ,  John G. Marshall

IPC: G10K11/168 ,  F01D25/24 ,  F02C7/24 ,  G10K11/172 ,  H02K5/24 ,  H02K7/18 ,  F02K1/82 ,  F02C7/045

Abstract: A fairing for a power generation machine, the fairing comprising: a first layer comprising a metallic material; a second layer comprising a composite; and a third layer positioned between the first layer and the second layer, the third layer being configured to attenuate acoustic waves over a predetermined frequency range.

公开(公告)号：US20220389875A1

公开(公告)日：2022-12-08

申请号：US17889158

申请日：2022-08-16

Applicant: ROLLS-ROYCE plc

Inventor： Craig W BEMMENT

IPC: F02C7/36 ,  F01D15/12 ,  F01L15/12

Abstract: The present disclosure relates to a geared gas turbine engine for an aircraft. Example embodiments include a gas turbine engine for an aircraft including: an engine core having a turbine, a compressor, and a core shaft connecting the turbine to the compressor; a fan located upstream of the engine core, the fan having a plurality of fan blades; and a gearbox that receives an input from the core shaft to drive the fan at a lower rotational speed than the core shaft, the gearbox having a gear ratio of around 3.4 or higher, wherein the gas turbine engine is configured such that a jet velocity ratio between a first jet velocity exiting from a bypass duct of the engine and a second jet velocity exiting from an exhaust nozzle of the engine core is within a range from around 0.75 to around 0.82.

公开(公告)号：US11519297B2

公开(公告)日：2022-12-06

申请号：US16828102

申请日：2020-03-24

Applicant: ROLLS-ROYCE plc

Inventor： Michael Booth ,  Andrew Smith ,  Ajay Patel

IPC: F01D25/18 ,  F01M1/10 ,  F01M1/20 ,  F01D9/06

Abstract: An oil pipe assembly for a gas turbine engine. The oil pipe assembly includes a first pipe that defines a first fluid passage between an oil supply and a bearing chamber, and a second pipe that houses the first pipe and defines a second fluid passage between the first pipe and the second pipe that is supplied with cooling air. The oil pipe assembly also includes a restrictor that extends from the second pipe and restricts the passage of fluid from the second fluid passage before it flows into a breather. Pressure and temperature sensors) are located adjacent the restrictor to detect and measure changes in air pressure and air temperature adjacent the restrictor from which a controller identifies whether a leak has occurred in the first pipe or the second pipe. A method for detecting a leak in the oil pipe assembly, and a gas turbine are also described.

公开(公告)号：US11512378B2

公开(公告)日：2022-11-29

申请号：US17087202

申请日：2020-11-02

Applicant: ROLLS-ROYCE plc

Inventor： James G. Brewster ,  Joao P. Martins

IPC: B32B15/04 ,  C23C4/134 ,  C23C4/073 ,  C23C28/00 ,  B32B15/20 ,  F01D1/00

Abstract: A method of assessing the quality of a bond coat for bonding a ceramic coating to a metallic substrate comprises determining a thresholded summit area for the bond coat.

公开(公告)号：US20220364772A1

公开(公告)日：2022-11-17

申请号：US17761429

申请日：2020-09-03

Applicant: ROLLS-ROYCE PLC

Inventor： Ian M BUNCE ,  Chloe J PALMER

IPC: F25B9/06 ,  F25B9/00 ,  F25B43/04

Abstract: A trans-critical thermodynamic system includes an expansion device and a separator. The expansion device receives a supercritical fluid containing solutes. The expansion device is operable to expand the supercritical fluid to produce a sub-critical gas by reducing a temperature and/or a pressure of the supercritical fluid. The separator removes the solutes from the sub-critical gas.

公开(公告)号：US20220364481A1

公开(公告)日：2022-11-17

申请号：US17863836

申请日：2022-07-13

Applicant: ROLLS-ROYCE PLC

Inventor： Mark SPRUCE

IPC: F01D25/18 ,  F02C7/36 ,  F16H57/04 ,  F02C7/06 ,  F02K3/06 ,  F02C3/113 ,  F01D25/16

Abstract: Gearboxes for aircraft gas turbine engines, in particular to arrangements for journal bearings such gearboxes, and to related methods of operating such gearboxes and gas turbine engines. Example embodiments include a gearbox for an aircraft gas turbine engine, the gearbox including: a sun gear; a plurality of planet gears surrounding and engaged with the sun gear; and a ring gear surrounding and engaged with the plurality of planet gears, each of the plurality of planet gears being rotatably mounted around a pin of a planet gear carrier with a journal bearing having an internal sliding surface on the planet gear and an external sliding surface on the pin.

公开(公告)号：US11498450B2

公开(公告)日：2022-11-15

申请号：US16867676

申请日：2020-05-06

Applicant: ROLLS-ROYCE plc

Inventor： Talib E. Rajabally ,  Maszatul Mansor

IPC: B60L58/12 ,  G06F16/245 ,  B60L55/00 ,  B60L53/62 ,  B60L53/63 ,  H02J3/32 ,  G07C9/38 ,  G06Q10/02 ,  G06Q10/04 ,  G06Q10/06 ,  G06Q50/06 ,  G06Q50/30 ,  H02J3/38 ,  H02J7/00 ,  B60L53/51 ,  B60L53/52 ,  B60K6/28

Abstract: A computer-based method is provided of forecasting total electric vehicle state of charge and total electric vehicle energy storage capacity in a parking area having parking bays with respective electrical vehicle charging and discharging facilities. Electric vehicles occupying the bays can provide temporary energy storage capacity to an energy grid. The forecasting method includes: forecasting future occupation of the bays by electric vehicles based on expected arrival times and expected stay durations; obtaining expected charge and discharge capabilities of the vehicles; forecasting a total state of charge and total energy storage capacity in the parking area; recording actual arrivals and departures; and adjusting the forecast of future occupation and the forecast of total state of charge and total energy storage capacity in the parking area.