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.