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公开(公告)号：US20250154894A1
公开(公告)日：2025-05-15
申请号：US18916958
申请日：2024-10-16
Applicant: Rolls-Royce plc
Inventor： Michael C. WILLMOT , Gergana Yanakieva DIMITROVA
Abstract: A propulsion system comprises a propulsive hydrogen-burning gas turbine engine, a fuel cell stack auxiliary power unit (APU) and a first tank arranged to store liquid hydrogen with an ullage. A first fuel line includes a first pump and a first vaporiser and transports hydrogen from the first tank to combustion apparatus of the engine during operation of the propulsion system. A second fuel line includes a second fuel pump and a second vaporiser and transports hydrogen from the first tank to the fuel cell stack APU. A duct connects the second fuel line at a position thereon between the second vaporiser and the fuel cell stack to the ullage of the first tank, providing for pressure in the first tank to be maintained therein as liquid hydrogen within the first tank is depleted, thus avoiding cavitation of liquid hydrogen within the first fuel pump.
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公开(公告)号：US20250154880A1
公开(公告)日：2025-05-15
申请号：US19022341
申请日：2025-01-15
Applicant: ROLLS-ROYCE plc
Inventor： Craig TOWN , Jason J. MADGE
Abstract: A bearing carrier support for connecting a rotary shaft of a gas turbine engine to a static portion of the gas turbine engine. The bearing carrier support has: a bearing portion for supporting the rotary shaft; a flange portion for attaching the bearing carrier support to the static portion of the gas turbine engine; and a support portion that connects the flange portion and the bearing portion. The support portion has a plurality of circumferentially distributed struts that are axially aligned with respect to the rotary shaft. A snubber extends from either the flange portion or bearing portion to form an abutment face.
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公开(公告)号：US20250149686A1
公开(公告)日：2025-05-08
申请号：US18939002
申请日：2024-11-06
Applicant: Rolls-Royce plc
Inventor： István ÖRÖKÖS-TÓTH , Daniel Lorincz , Kolos Hasznosi , Andras Lukacs
IPC: H01M10/658 , H01M10/0525 , H01M10/42 , H01M10/613 , H01M10/6554 , H01M50/209 , H01M50/211 , H01M50/213 , H01M50/293
Abstract: The disclosure relates to thermal management of a battery cell array in a battery module for high power applications. In example embodiments, a battery module comprises: a plurality of battery cells (1011-n) arranged in an array (102); a cooling system (104) comprising a plurality of heat exchanger plates (1051-3) interleaved between rows (1031-6) of the battery cell array (102); and a plurality of thermal barrier walls (1101-3) interleaved between rows (1031-6) of the battery cell array (102).
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公开(公告)号：US20250147103A1
公开(公告)日：2025-05-08
申请号：US18907721
申请日：2024-10-07
Applicant: ROLLS-ROYCE plc
Inventor： Benedict MERRETT
Abstract: A fault detector for a control system that includes a controller, a solenoid driver, a current sensor and a solenoid. The solenoid driver provides a current to the solenoid in response to a control signal provided by the controller to the solenoid driver and the current sensor measures the current provided by the solenoid driver to the solenoid to determine a current measurement. At any moment, the control signal corresponds to one of a demanded zero current, a demanded first current magnitude or a demanded second current magnitude. The fault detector detects a fault based upon a comparison of the current measurement to an expected current range, wherein the expected current range is dependent upon which of the demanded zero current, demanded first current magnitude or the demanded second current magnitude the control system corresponds to at that moment.
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公开(公告)号：US12292008B2
公开(公告)日：2025-05-06
申请号：US18162964
申请日：2023-02-01
Applicant: ROLLS-ROYCE plc
Inventor： Peter Swann
Abstract: A system comprises first and second first fuel stores, an engine arranged to produce mechanical power, a fuel distribution system arranged to deliver fuel from the first and second fuel stores to the engine, the first fuel delivered at a first mass flow rate, the second fuel delivered at a second mass flow rate, the first and second mass flow rates contributing to a total mass flow rate of fuel to the engine, and a control system arranged to increase the relative fraction of the total mass flow rate of fuel represented by the second mass flow rate during a period of acceleration of the engine, in order to control a surge margin of the engine. The second fuel is selected to have a higher specific energy than the first fuel and to release a greater mass of water per unit mass of fuel than the first fuel.
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Patent Agency Ranking
公开(公告)号：US20250141336A1
公开(公告)日：2025-05-01
申请号：US18925988
申请日：2024-10-24
Applicant: Rolls-Royce plc
Inventor： David R. TRAINER , Mark SWEET
Abstract: An electrical power system includes: an H-bridge DC:DC power converter including first and second half-bridge circuits having low-side transistors and a high-side transistors, and an inductor connected between AC sides of the first and second half-bridge circuits; a DC power source connected to a first half-bridge circuit DC side; a DC electrical network connected to a second half-bridge circuit DC side; and a control system. The control system: controls the low-side and high-side transistors' switching state of the first and second half-bridge circuits; monitors one or more electrical power system operating parameters and determines whether there is a fault in the DC electrical network; and in response, modifies a switching operation of the low-side and high-side transistors of the first and second half-bridge circuits to supply a controlled amount of current from the DC power source to the DC electrical network.
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公开(公告)号：US20250141004A1
公开(公告)日：2025-05-01
申请号：US18925303
申请日：2024-10-24
Applicant: ROLLS-ROYCE plc
Inventor： Matthew DOBSON
IPC: H01M50/231 , H01M10/658 , H01M50/238 , H01M50/249 , H01M50/342 , H01M50/358
Abstract: The disclosure relates to a battery pack module, for example for use in an electric or hybrid aircraft. Example embodiments include a battery pack module (600) comprising: a plurality of battery cells (6011-n) arranged in a battery cell array (602); an enclosure (604) comprising a plurality of walls surrounding the battery cell array (602); and a vent (605) connected to the enclosure (604) and arranged to provide a fluid flow path between an interior (607) of the enclosure (604) and an external environment (610) upon a pressure differential between the interior (607) of the enclosure (604) and the external environment (610) exceeding a predetermined threshold, wherein the walls of the enclosure (604) are composed of a fire-resistant laminated material comprising a plurality of fabric layers.
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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
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.
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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
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.
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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.
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