公开(公告)号：US10338143B2

公开(公告)日：2019-07-02

申请号：US15653054

申请日：2017-07-18

Applicant: ROLLS-ROYCE plc

Inventor： Chandana J Gajanayake ,  Sivakumar Nadarajan ,  Amit K Gupta ,  Chao Bi ,  Nay Lin Htun Aung ,  Jiang Quan

IPC: G01R31/00 ,  G01R31/34 ,  G01R23/16 ,  G01R33/09 ,  G01R33/12

Abstract: A fault condition is diagnosed in an electric machine that includes a rotor and a plurality of permanent magnets. To do so, the rotor is rotated so that each of the plurality of permanent magnets passes a magnetic flux density sensor, and the values of magnetic flux density are measured using the magnetic flux density sensor at a plurality of positions of the rotor. The measured values of magnetic flux density are analyzed and a magnitude of a peak amplitude is compared in a time or frequency domain with a reference value. If the peak amplitude is below the reference value, the electric machine is determined to have a fault condition.

公开(公告)号：US10337350B2

公开(公告)日：2019-07-02

申请号：US14630771

申请日：2015-02-25

Applicant: ROLLS-ROYCE PLC

Inventor： Keith Jeremy Paul Thomas

IPC: F01D25/24 ,  F01D21/04

Abstract: A fan containment system for fitment around an array of radially extending fan blades mounted on a hub in an axial gas turbine engine. The fan containment system comprises a fan case having an annular casing element for encircling an array of fan blades. An annular fan track liner is positioned substantially coaxial to the annular casing element, and one or more pockets are provided in a radially outer side of the fan track liner. One or more dampers for damping vibration of the fan track liner are positioned in each of the one or more pockets and are arranged so as to contact the annular casing element.

公开(公告)号：US20190195497A1

公开(公告)日：2019-06-27

申请号：US16288535

申请日：2019-02-28

Applicant: ROLLS-ROYCE plc

Inventor： Jonathan F. CARROTTE ,  Stephen C. HARDING ,  Ashley G. BARKER

IPC: F23R3/20 ,  F02C7/22 ,  F23R3/34 ,  F23D11/10

CPC classification number: F23R3/20 ,  F02C7/222 ,  F23D11/107 ,  F23D2206/10 ,  F23D2900/11401 ,  F23R3/343 ,  F23R2900/00014

Abstract: A fuel injection system for a gas turbine engine comprises; a pilot fuel injector section and a main airblast fuel injector section, the main airblast fuel injector section having an aft end facing a combustion chamber. A surface of the injection system exposed to air flow through an injection system is non-axisymmetric or non-planar in a reference circumferential plane and/or is configured to generate controlled and varying acoustic impedance at or adjacent the aft end where, in use, the air flow collides with an oncoming acoustic wave.

公开(公告)号：US10331815B2

公开(公告)日：2019-06-25

申请号：US15215070

申请日：2016-07-20

Applicant: ROLLS-ROYCE plc

Inventor： David S Cooper

IPC: G06F7/60 ,  G06F17/10 ,  G06F17/50 ,  G01B21/20 ,  G06F17/11

Abstract: There is disclosed a method of estimating a precursor shape (44, 45) for a part (2) suitable for manufacture via a process selected from a plurality of manufacturing processes. The method includes: generating a convergence line (20) within the confines of a final part shape (1); providing an array (18) of spaced-apart forming shape points (19) around the final part shape (1); converging said points (19) towards the convergence line (20) using a force-energy-balance technique via a movement algorithm; and applying a smoothing algorithm to the converged points (19) to create an estimated precursor shape (44, 45). The algorithms include coefficients specific to a predetermined one of said manufacturing processes.

公开(公告)号：US20190178387A1

公开(公告)日：2019-06-13

申请号：US16202398

申请日：2018-11-28

Applicant: ROLLS-ROYCE plc

Inventor： Kali Charan NAYAK ,  Matthew K. DUNK

IPC: F16J15/447 ,  F02C7/28 ,  F01D11/02

Abstract: A labyrinth seal having a land that comprises an array of polygonal cells, wherein at least 50% of the cells include a planar wall that subdivides the cell. The seal reduces seal leakage and can reduce specific fuel consumption of gas turbine engines that include such seals.

公开(公告)号：US20190176222A1

公开(公告)日：2019-06-13

申请号：US16186632

申请日：2018-11-12

Applicant: ROLLS-ROYCE plc

Inventor： Aleksander M. CENDROWICZ

IPC: B22C9/10 ,  F01D5/18 ,  F01D5/28

Abstract: An assembly of core components is provided for investment casting. First core component has an arrangement of pedestals and second core component has an arrangement holes. The first and second core components are assembled to mate in a required positional relationship. Pedestals 106 extend through the holes so that a protruding portion of each pedestal protrudes from the hole. A moulding material is applied to encapsulate the protruding portions of the pedestals to secure the pedestals with respect to the holes and thereby to secure the first core component with respect to the second core component.

公开(公告)号：US10316882B2

公开(公告)日：2019-06-11

申请号：US15202151

申请日：2016-07-05

Applicant: ROLLS-ROYCE PLC

Inventor： Glen Pattinson ,  Lloyd Pallett

IPC: F16B35/04 ,  F16B33/06 ,  C23C14/16 ,  C23C14/48 ,  C23C28/02 ,  C23C14/14 ,  C23C16/06

Abstract: A method of providing a threaded fastener with a multi-layered coating comprises the step of using a vapor deposition process to apply a multi-layered coating to a threaded portion of the threaded fastener, each layer of the multi-layered coating being formed from a coating material selected from the group comprising titanium, chromium, nickel, platinum, tantalum, and combinations thereof.

公开(公告)号：US10316854B2

公开(公告)日：2019-06-11

申请号：US15446506

申请日：2017-03-01

Applicant: ROLLS-ROYCE PLC

Inventor： Martin T Bentley

IPC: F01D5/06 ,  F01D5/08 ,  F16C3/02 ,  F01D11/00 ,  F04D29/32 ,  F04D29/053

Abstract: A shaft has an axis, an outer surface, an inner surface and is arranged to rotate in a first circumferential direction. The shaft comprises a first set of equally circumferentially spaced apertures extending through the shaft between the outer and inner surfaces of the shaft. A second set of equally circumferentially spaced apertures extends through the shaft between the outer and inner surfaces of the shaft. The first and second sets of apertures are arranged in first and second planes arranged perpendicularly to the axis of the shaft. The second plane is spaced axially downstream from the first plane. Each aperture in the second set of apertures is circumferentially displaced in a second circumferential direction from a circumferential mid position between the two apertures in the first set of apertures to reduce the stresses in the shaft.

公开(公告)号：US10316682B2

公开(公告)日：2019-06-11

申请号：US15088852

申请日：2016-04-01

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

Inventor： Daniel K. Vetters ,  Paul A. Davis ,  Simon L. Jones ,  Steven Hillier ,  Peter Broadhead

IPC: F01D11/12 ,  C04B35/83 ,  C04B35/80 ,  F04D29/16 ,  F01D25/00 ,  F01D25/12 ,  F04D29/52

Abstract: A blade track for a gas turbine engine includes a plurality of blade track segments. The blade track segments are arranged circumferentially around a central axis to form the blade track.

公开(公告)号：US20190170355A1

公开(公告)日：2019-06-06

申请号：US16188352

申请日：2018-11-13

Applicant: ROLLS-ROYCE plc

Inventor： Luca TENTORIO ,  Hua Wei HUANG ,  Carl MULDAL ,  Juan Carlos ROMAN CASADO

IPC: F23R3/14 ,  F23R3/28 ,  F23R3/34

Abstract: A lean burn fuel injector comprises a fuel feed arm and a fuel injector head. The fuel feed arm has a single pilot fuel supply passage and a single main fuel supply passage extending there-through. The fuel injector head has a coaxial arrangement of an inner pilot air-blast fuel injector and a coaxially arranged outer main air-blast fuel injector. The inner pilot air-blast fuel injector comprises a coaxial arrangement of a pilot inner air swirler passage and a pilot outer air swirler passage. The outer main air-blast fuel injector comprises a coaxial arrangement of a main inner air swirler passage and a main outer air swirler passage. The single main fuel supply passage is arranged to supply main fuel to the main inner air swirler passage. The single pilot fuel supply passage is arranged to supply pilot fuel onto the pre-filming surfaces in the pilot inner and outer air swirler passages.