公开(公告)号：US11230941B2

公开(公告)日：2022-01-25

申请号：US16914911

申请日：2020-06-29

Applicant: ROLLS-ROYCE plc

Inventor： Jonathan P Bradley

IPC: F01D15/10 ,  F01D25/16

Abstract: An aircraft gas turbine engine (10) comprises a main engine spool (22) and a bearing arrangement (36) configured to rotatably support the main engine spool (22). The bearing arrangement (36) includes a damper (41) comprising a static element (42) and a moveable element (39). The gas turbine engine further comprises an electric machine (30) comprising a rotor (34) and a stator (32). The rotor (34) is mounted to the main engine spool (22), and the stator (32) is mounted to the moveable element (39) of the damper to be moveable with the moveable element (39).

公开(公告)号：US10794469B2

公开(公告)日：2020-10-06

申请号：US15155398

申请日：2016-05-16

Applicant: ROLLS-ROYCE PLC

Inventor： Jonathan P Bradley

IPC: F16H57/04 ,  F02C3/04 ,  F02C7/36 ,  F16H1/28 ,  F16H57/08

Abstract: A gas turbine engine includes a gearbox including a sun gear, annulus gear, plurality of planet gears and a planet gear carrier. Each planet gear is rotatably mounted in the planet gear carrier by a planet gear bearing. A lubrication system is arranged to supply lubricant to the planet gear bearings and at least one of the sun gear, the planet gears and the annulus gears. The planet gear carrier includes an annular extension. The lubrication system includes an annular member arranged around annular extension to define an annular chamber which is sealed at its ends to the planet gear carrier and which contains a reserve of lubricant. The annular member has an inlet to supply lubricant into the annular chamber and the planet carrier has a first passage to supply lubricant to the sun, planet or annulus gear and a second passage to supply lubricant to planet gear bearings.

公开(公告)号：US11230942B2

公开(公告)日：2022-01-25

申请号：US16915032

申请日：2020-06-29

Applicant: ROLLS-ROYCE plc

Inventor： Jonathan P Bradley

IPC: F01D15/10 ,  F01D15/12 ,  F02C7/32 ,  F02C7/36

Abstract: An aircraft gas turbine engine (10) comprises a main engine shaft (22) arranged to couple a turbine (17) and a compressor (13), the main engine shaft (22) defining an axial direction (9). The gas turbine engine (10) further comprises at least one radially extending offtake shaft (27) coupled to the main engine shaft (22), and a radially extending electric machine (25a, 25b) coupled to the radially extending offtake shaft (22).

公开(公告)号：US10443701B2

公开(公告)日：2019-10-15

申请号：US15703535

申请日：2017-09-13

Applicant: ROLLS-ROYCE plc

Inventor： Jason J Madge ,  Jonathan P Bradley

IPC: F16H57/08 ,  F16H57/023 ,  F02C7/36 ,  F16H57/04 ,  F16H1/28 ,  F02K3/06 ,  F16H57/00

Abstract: A planetary gear box assembly, comprises a sun gear and a plurality of planet gears in meshing engagement with the sun gear; the planet gears in meshing engagement with a ring gear which encircles the plurality of planet gears, each planet gear mounted for rotation in a planet carrier by means of a bearing pin wherein a bore in the planet carrier for receiving the bearing pin is parallel. The bearing pin includes a small axially tapered section adjacent one or both ends and the assembly further comprises a tapered sleeve configured to interference fit between a radially inner wall surface of the parallel bore and a radially outer surface of the or each axially tapered section.

公开(公告)号：US09970528B2

公开(公告)日：2018-05-15

申请号：US15438314

申请日：2017-02-21

Applicant: ROLLS-ROYCE PLC

Inventor： Jonathan P Bradley ,  Jason J Madge

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

CPC classification number: F16H57/082 ,  F02C7/36 ,  F05D2260/40311 ,  F16H1/28

Abstract: A transmission system for transmitting a change of speed between two rotating shafts, includes a planetary gear box having a sun gear arranged for rotation with a first shaft travelling at a first speed. Planet gears contained within a ring gear are arranged to orbit the sun gear when the sun gear rotates and the ring gear is in a fixed position. Each planet gear is mounted for rotation on a centrifugal carrier. An output carrier includes a body having arms and the arms are each aligned with an axis of rotation of a planet gear and held to the centrifugal carrier by one or more supports extending in a radial plane. An output shaft extends from the body in coaxial alignment with the input shaft. A connector which is stiff in a radial dimension but flexible under torsional load is arranged between the output carrier and the centrifugal carrier.