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EPR Proprietary I Licensed Material
Rolls-Royce Aero-Derivative Combustion Turbine Background
2-15
Design
Characteristic
RB211 – 6562
(RB211-24G Gas Generator
with RT62 Power Turbine)
RB211 – 6761
(RB211-24GT Gas
Generator with RT61 Power
Turbine)
Trent 60 DLE
(Derivative of AERO 800 on
Boeing 777 and Airbus
A330)
Trent 60 WLE
(Derivative of AERO 800 on
Boeing 777 and Airbus
A330)
Reliability, Maintainability, Durability
Comments
Turbine Rotor
(see Power Turbine
Description)
(see Power Turbine
Description)
HPT 1 Stage, IPT 1 Stage
LPT 5 Stages with aft 2
stages functioning as a
Power Turbine
HPT 1 Stage, IPT 1 Stage
LPT 5 Stages with aft 2
stages functioning as a
Power Turbine
PT Free Power
Turbine
(Industrial Type)
RT62 Introduced 1982;
Two stage PT with industrial
thrust & journal bearing
RT61 Introduced in 1997;
Three Stage PT unit with
industrial thrust and journal
bearings
(see LP Turbine Description) (see LP Turbine Description)
PT Casings
Pedestal base that supports
both PT & GG assemblies
Strutless inlet & exhaust
diffusers
Lighter weight unit with
modular construction (5)
(see LP Turbine Description) (see LP Turbine Description)
PT Nozzle Vanes
Stage 1 vanes Rene' 80
Stage 2 vanes U - 500
46 First Stage Nozzle Vanes
Rene' 80
60 Second Stage Nozzle
Vanes U-500
60 Third Stage Nozzle Vanes
N-155
(see LP Turbine Description) (see LP Turbine Description)
PT Rotor
Shaft AISI 4340 high tensile
Ni Cr Mo Alloy Steel
(Overhung design)
Shaft AISI 4340 high tensile
Ni Cr No Alloy Steel
(Overhung design)
(see LP Turbine Description) (see LP Turbine Description)
PT Rotor Blades
1
st
stage blades: Rene' 80
(83 count)
2
nd
stage blades U-500
(83 count)
1st Stage Blades:Rene' 80
(83 count)
2nd Stage Blades U-500
(79 count)
3rd Stage Blades N-155
(71 count)
Interlocking, shrouded blades
with honeycomb tip seals
(see LP Turbine Description) (see LP Turbine Description)
PT Rotor Disks
Both disks INCO 901 Ni Co
Base Alloy
Disks are joined with Curvic
Couplings
Inco 901
(see LP Turbine Description) (see LP Turbine Description)
PT Bearings &
Seals
Kingsbury type Thrust
Bearing (1)
Tilting Pad type Journal
Bearings (2)
Labyrinth Seals (SS)
Kingsbury Type Thrust
Bearing (1)
Tilting Pad Type Journal
Bearings (2)
Labyrinth Seals (SS)
(see LP Turbine Description) (see LP Turbine Description)