公开(公告)号：US09845682B2

公开(公告)日：2017-12-19

申请号：US14709883

申请日：2015-05-12

Applicant: ROLLS-ROYCE PLC

Inventor： Alan R Maguire ,  Kenneth F Udall ,  Phillip J Doorbar

IPC: F01D5/32 ,  F01D5/02 ,  F01D5/30 ,  F01D25/16

CPC classification number: F01D5/025 ,  F01D5/3007 ,  F01D25/164 ,  F05D2220/36

Abstract: A fan disc is provided for supporting fan blades of a gas turbine engine. The fan disc has a disc body having axially extending slots for receiving, in use, dovetail root fixings of a circumferential row of fan blades. The fan disc further has an annular drive arm which extends radially inwardly from a forward portion of the disc body to a connector for engaging, in use, with a corresponding connector portion of a drive shaft of the engine. The fan disc further has a hoop stiffening ring which is removably mounted to a rear portion of the disc body, the stiffening ring being axially spaced from the drive arm to increase the torsional stiffness of the fan disc.

公开(公告)号：US10458274B2

公开(公告)日：2019-10-29

申请号：US15625523

申请日：2017-06-16

Applicant: ROLLS-ROYCE plc

Inventor： Phillip J Doorbar ,  Jason J Madge

IPC: F01D25/00 ,  F01D15/12 ,  F01D5/06 ,  F01D15/08 ,  F01D25/16 ,  F16H1/28 ,  F16H57/08 ,  F02C7/36

Abstract: A gas turbine engine comprises a gearbox comprises a sun gear, an annulus gear, a plurality of planet gears and a carrier. The sun gear meshes with the planet gears and the planet gears mesh with the annulus gear. The planet gear carrier comprising a first ring, a second ring spaced axially from the first ring and a plurality of circumferentially spaced axles extending axially between the first ring and the second ring. Each planet gear is rotatably mounted on a respective one of the axles and the axles are arranged at a first radius. At least one of the first ring and the second ring comprises a metal matrix composite material ring and the metal matrix composite ring comprises a ring of reinforcing fibres and the ring of reinforcing fibres having a second radius greater than the first radius.