公开(公告)号：US20180216631A1

公开(公告)日：2018-08-02

申请号：US15881879

申请日：2018-01-29

Applicant: ROLLS-ROYCE plc

Inventor： Stewart T. THORNTON ,  Nicholas E. CHILTON

IPC: F04D29/54 ,  F02C7/36

CPC classification number: F04D29/542 ,  F01D5/02 ,  F01D9/041 ,  F01D25/162 ,  F02C7/36 ,  F02K3/06 ,  F04D29/321 ,  F04D29/325 ,  F05D2220/32 ,  F05D2220/3217 ,  F05D2240/126 ,  F05D2240/80 ,  F05D2260/40311 ,  Y02T50/673

Abstract: A geared gas turbine engine comprises at least one compressor, at least one turbine, a fan, a gearbox and a support structure. At least one turbine is arranged to drive the fan via the gearbox. The fan is rotatably mounted in the support structure and the support structure supports the gearbox. The support structure includes a stator vane arrangement comprising a plurality of circumferentially spaced stator vanes extending radially between inner and outer annular walls. The inner annular wall has two axially spaced radially inwardly extending annular flanges and a plurality of circumferentially spaced buttresses extending axially between the annular flanges. The outer annular wall has two axially spaced radially outwardly extending annular flanges and a plurality of circumferentially buttresses extending axially between the annular flanges. The flanges and buttresses increase the strength of the support structure to carry the torque loads of the gearbox.

公开(公告)号：US20170226859A1

公开(公告)日：2017-08-10

申请号：US15399457

申请日：2017-01-05

Applicant: ROLLS-ROYCE PLC

Inventor： David A. EDWARDS ,  Stewart T. THORNTON

IPC: F01D3/04 ,  F01D25/16

Abstract: A thrust balancing mechanism for balancing axial loads on a rotor thrust bearing 3 is described. The mechanism comprises a piston arrangement 6 axially mounted on a stationary structure 2, about a centre axis arranged, in use, in coaxial alignment with a rotating shaft 1 carrying the rotor thrust bearing 3. A hydrodynamic thrust bearing 8 is mounted, in use, between the piston 6 and the rotor thrust bearing 3. The piston 6 is pressurised so as to impart to the rotor thrust bearing 3, via the hydrodynamic thrust bearing 8, an axial load which counters an axial load imparted to the rotor thrust bearing 3 by the rotating shaft 1.