GE-CF6-80E1-24

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HIGH PRESSURE COMPRESSOR
FWD MOUNT
COMBUSTION
SECTION
HP
TURBINE
LP TURBINEFAN AND LP COMPRESSOR
VSV 7.ST
8.ST
11.ST
14.ST
VBV
TGB AGB
IGV 1 2 3 4 5 6 7 8 9 1011121314
IGB
Scanned Picture
1ST 2 3
4
5
AFT MOUNT
A330 - ENGINE ATA 71 up 80
GE CF6-80E1 47 of 394
 
 
 
 
 
 
 
 
 
 
 
FAN AND LPC DESCRIPTION
Fan Blade
Fan blades are manufactured from a Titanium alloy. They are replaceable
separately. If the blades are damaged (e.g. FOD) a fan blade blending is
possible in certain areas. Observe the following:
� Consult the Maintenance Manual for allowed limits, tools etc.
� Large reduction of material has influence to the momentum weight of the
blade and may result in unbalance.
� blending must be made only in longitudinal direction of the blade.
Fan Blade Containment
The purpose of this special case design is to prevent that teared off fan blades
(or parts of them ) are going through the fan case in radial direction.
In a ring of aluminum honey comb (nest area) the most of the energy of the
ripped off fan blade becomes destroyed.
A coating of high tensile KEVLAR is able to destroy the remaining energy and
also to catch the parts of the damaged fan blade. A case of fiberglass epoxy
serves as outer protection coating.
Outlet Guide Vanes (OGV)
The outlet guide vanes are installed radially. They are attached only to the
outer fan stator case by a bolt. The foot of the vane is inserted in a slot in the
inner acoustic liner. The outlet guide vanes can be replaced separately.
For aerodynamical reasons there are three different kinds of outlet guide
vanes installed.
Acoustic Liner
The fan duct is panelled with sound absorbing segments. The surfcace of this
acoustical liners consists of a thin wired mesh. This texture is sensitive against
scratches and punctual pressure.
No. 1 Bearing Manifold
The purpose of the bearing manifold (centrifuge) is to separate oil from the
oil vapor of the sump vent and oil tank.
Damaged O Rings may allow oil coming out of the centrifuge and enter the
inner part of the fan disk (hub). This can produce unbalance (fan vibrations).
N1 Speed Sensor
The sensor for the N1 speed measurement systems (Indication, ECU, EIVMU)
is installed in the inner area of the fan frame. The measuring head (sensor tip)
is routed through a guiding tube to a speed sensor cage (toothed wheel) which
is installed on the N1 shaft.
The toothed wheel has a tooth for each fan blade (a total of 34). One of them is
a small amount wider than the others. This tooth is named ”Reference Lug”
and produces a different (induction) pulse. The EIVMU uses this pulse to
calculate the position of the fan blade No. 1.
A330 - ENGINE ATA 71 up 80
GE CF6-80E1 48 of 394