公开(公告)号：US20220228950A1

公开(公告)日：2022-07-21

申请号：US17152436

申请日：2021-01-19

Applicant: Rolls-Royce Corporation

Inventor： Emily Holdmeyer ,  Bruce Crook

IPC: G01M15/02 ,  G01M13/003

Abstract: Systems and methods for control of the delivery of contaminates are provided. A conveyor moves contaminate particles from a hopper into an airflow. The contents of a hopper at multiple time points within a sliding window of time are weighted with a scale. A processor applies linear regression to a data set comprising the time points as an independent variable and the weight measurements as a dependent variable, resulting in a determination of a line fitting the data set. A processor determines a current mass flow rate of the contaminate particles from the slope of the line. The processor determines an estimated change in the conveyor motor speed needed to achieve the target mass flow rate, the estimated change determined from a predetermined mapping of flow rates to motor speeds, the estimated change based on the current mass flow rate, the target mass flow rate, and a predetermined fraction.

公开(公告)号：US11365678B2

公开(公告)日：2022-06-21

申请号：US16224168

申请日：2018-12-18

Applicant: Rolls-Royce Corporation

Inventor： Andrew C. Pickard ,  Danielle J. Wilson

IPC: F02C7/047 ,  F02C7/232 ,  G05D23/12 ,  G05D23/02 ,  F16K31/00 ,  F16K3/26 ,  B64D15/04 ,  F01D17/16 ,  B64D15/22 ,  F02C9/26 ,  F01D17/14 ,  F01D25/02

Abstract: A fluid valve is provided including an inner shell and an outer shell. The inner shell includes a sidewall having a first opening and an interior surface defining an inner chamber. The outer shell includes a sidewall having a second opening and an exterior surface defining an outer chamber. The inner shell is positioned within the outer shell and the inner shell is movable relative to the outer chamber between a first position and a second position by a change in fluid conditions of a fluid supplied to the fluid valve. The first opening and the second opening overlap to define a passageway extending from the interior surface of the inner shell to the exterior surface of the outer shell. Relative movement of the inner shell from the first position toward the second position reduces a cross-sectional area of the passageway.

公开(公告)号：US20220186381A1

公开(公告)日：2022-06-16

申请号：US17551480

申请日：2021-12-15

Applicant: Rolls-Royce Corporation ,  Rolls-Royce plc

Inventor： Quinlan Yee Shuck ,  Scott Nelson ,  Martyn Anthony Jones ,  Peter E. Daum

IPC: C23C24/04 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/00

Abstract: A method may include cold spraying a masking material on selected locations of a component to form a masking layer, wherein the masking material comprises a metal or alloy; additively manufacturing an additively manufactured portion of the component at locations at which the masking layer is not present; and removing the masking layer from the component. The masking layer may be configured to protect portions of the component by covering or otherwise providing a physical barrier that reduces or prevents material from adhering to unwanted portions of the component during a subsequent manufacturing and/or repair technique. Additionally, the masking layer may be reflective to infrared radiation and/or intimately contact the component and function as a heat sink or thermally conductive layer to transfer heat from the component.

公开(公告)号：US11353089B2

公开(公告)日：2022-06-07

申请号：US16592492

申请日：2019-10-03

Applicant: Rolls-Royce Corporation

Inventor： Brian Bennett ,  Mark Winely

IPC: F16H1/28 ,  F02C7/36 ,  F16H57/08

Abstract: A planet gear housing assembly is disclosed in an epicyclical gear system of a gas turbine engine. The planet gear housing assembly comprises an aft planet carrier assembly, a forward planet carrier assembly, and a plurality of planet gears. The planet gear housing assembly includes one or more of the following features: a stiffening member positioned between the forward and aft planet carrier assemblies, a static curvic joint coupling the forward and aft planet carrier assemblies, a plurality of roller element bearings to carry the plurality of planet gears, and one or more bearing springs disposed between a bearing and a carrier housing to accommodate relative movement.

公开(公告)号：US11339714B2

公开(公告)日：2022-05-24

申请号：US17061057

申请日：2020-10-01

Applicant: ROLLS-ROYCE plc ,  ROLLS-ROYCE CORPORATION

Inventor： Rory D Stieger ,  Daniel Swain

IPC: F02C3/08 ,  F02C7/18

Abstract: A gas turbine engine comprises, in fluid flow series, a gas-generator compressor, a combustor, a gas-generator turbine, and a free power turbine. The gas-generator compressor is an axi-centrifugal compressor comprising a plurality of axial compression stages followed by a single centrifugal compression stage, wherein the International Standard Atmosphere, sea-level static (hereinafter ISA SLS) design point pressure ratio of the axi-centrifugal compressor is from 12 to 16, and a ratio of the ISA SLS pressure rise across the axial compression stages to the ISA SLS pressure rise across the centrifugal compression stage is from 0.75 to 1.

公开(公告)号：US11336151B2

公开(公告)日：2022-05-17

申请号：US16404396

申请日：2019-05-06

Applicant: Rolls-Royce plc ,  Rolls-Royce Corporation

Inventor： David Scothern ,  Mark Boden ,  Don Klemen ,  William Williamson ,  Brian Maners

IPC: H02K9/19 ,  H02K5/173 ,  H02K5/20

Abstract: An electric starter-generator is described. The generator may comprise a rotor, a housing, two bearings, a stator, and a cooling-fluid flowpath. The cooling-fluid flowpath may comprise a cooling-fluid entrance and exit, and a cooling-fluid channel in fluid communication with the entrance and exit. At least a portion of the channel may be defined by a fluid-tight coupling of the housing and a sleeve radially surrounding the outer race of either the bearings. The portion may form an annulus about the axis. The portion may comprise a radially inner surface defined by the sleeve, a radially outer surface define by said housing, and two axial surfaces. The two axial surfaces may extend a distance from the radially inner to outer surfaces that is less than a distance from one of the two axial surfaces to the other of the two axial surfaces.

公开(公告)号：US11319828B1

公开(公告)日：2022-05-03

申请号：US17351741

申请日：2021-06-18

Applicant: Rolls-Royce Corporation

Inventor： Ted J. Freeman ,  Aaron D. Sippel ,  David J. Thomas

IPC: F01D11/08

Abstract: A turbine shroud assembly adapted for use with a gas turbine engine includes a carrier, a seal segment, and a mount assembly. The carrier is configured to be coupled to a turbine case. The seal segment is shaped to define a gas path boundary of the shroud assembly. The mounting assembly is configured to couple the seal segment to the carrier.

公开(公告)号：US11313324B2

公开(公告)日：2022-04-26

申请号：US16382354

申请日：2019-04-12

Applicant: Rolls-Royce Corporation

Inventor： Jeff Higbie ,  Robert Heeter ,  Ben Hodgson ,  Jon Rivers

IPC: F02K1/82 ,  F02C7/24 ,  B32B3/12 ,  B64D33/02 ,  F01D25/04

Abstract: Systems and methods are presented for acoustic dampening in a rotating machine. The rotating machine has a rotatable shaft defining an axis of rotation and a gas flowpath. A system comprises an acoustic panel affixed to an annular casing. The acoustic panel comprises an acoustic treatment member extending between a radially inner skin and radially outer skin. The radially inner skin extends the full axial and circumferential dimensions of the acoustic panel, and the acoustic treatment member overlays the entirety of the radially inner skin. The acoustic panel is positioned so that the radially outer skin abuts the casing, the abutting surfaces being configured to effect relative axial movement between the surfaces while maintaining contact between the surfaces. The acoustic panel is affixed in position to the casing by one or more fasteners passing through the casing and a portion of the radially outer skin.

公开(公告)号：US11305363B2

公开(公告)日：2022-04-19

申请号：US16272664

申请日：2019-02-11

Applicant: Rolls-Royce Corporation

Inventor： Raymond Ruiwen Xu ,  Scott Nelson ,  Joseph Peter Henderkott

IPC: B23K1/00 ,  F01D5/00 ,  F01D25/00 ,  C23C4/073 ,  B23K1/20 ,  B23P6/00

Abstract: A method may include removing a portion of a base component adjacent to a damaged portion of the base component to define a repair portion of the base component. The base component may include a cobalt- or nickel-based superalloy, and the repair portion of the base component may include a through-hole extending from a first surface of the base component to a second surface of the base component. The method also may include forming a braze sintered preform to substantially reproduce a shape of the through-hole. The braze sintered preform may include a Ni- or Co-based alloy. The method additionally may include placing the braze sintered preform in the through-hole and heating at least the braze sintered preform to cause the braze sintered preform to join to the repair portion of the base component and change a microstructure of the braze sintered preform to a brazed and diffused microstructure.

公开(公告)号：US11300008B2

公开(公告)日：2022-04-12

申请号：US16591388

申请日：2019-10-02

Applicant: Rolls-Royce Corporation ,  Rolls-Royce North American Technologies, Inc.

Inventor： Kerry J. Lighty ,  Phillip Burnside

IPC: F01D25/18 ,  F16H57/04 ,  F01D25/16 ,  F16C17/02 ,  F16C33/10

Abstract: A lubricant scavenging system for a turbine engine having a pair of concentric, counter-rotating shafts. The system comprises a lubricant sump housing having a radially inner surface, a pair of pedestal mounts each adapted to receive a bearing assembly from a respective shaft, a lubricant collection point axially disposed between the pedestal mounts, and a pair of axial channels adapted to guide lubricant toward the lubricant collection point.