DOC AIRBUS | AMM A320FACCESSORY GEARBOX (AGB) ASSEMBLY - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The Accessory Gearbox (AGB) assembly is mounted on the fan frame at the 8 o'clock position, aft looking forward.
It consists of a gear train that reduces and increases the rotational speed to meet the specific drive requirements of each accessory.
Some of the accessories are installed on the AGB through quick attach detach rings.
AGB module has the following sub-assemblies:
** ON A/C NOT FOR ALL The Accessory Gearbox (AGB) assembly is mounted on the fan frame at the 8 o'clock position, aft looking forward.
Accessory Gearbox (AGB)It consists of a gear train that reduces and increases the rotational speed to meet the specific drive requirements of each accessory.
Some of the accessories are installed on the AGB through quick attach detach rings.
AGB module has the following sub-assemblies:
- AGB housing assembly
- Gear train.
2. System Description
A. AGB Housing Assembly
The AGB housing is an aluminum alloy casting. It is mounted on the fan frame through four links (one central, one lateral, one upper and one lower).
The front face of the AGB housing has installation pads for the following accessories and equipment:
The rear face of the AGB housing connects with the slider and transfer tube and has installation pads for the following equipment:
The AGB housing is an aluminum alloy casting. It is mounted on the fan frame through four links (one central, one lateral, one upper and one lower).
The front face of the AGB housing has installation pads for the following accessories and equipment:
- Oil pressure and temperature
- Engine Driven Pump (EDP)
- Pneumatic air starter
- Integrated Drive Generator (IDG)
- Handcranking drive.
The rear face of the AGB housing connects with the slider and transfer tube and has installation pads for the following equipment:
- Lubrication unit
- Permanent Magnet Alternator (PMA)
- Fuel pump.
B. Gear Train
The gear train is contained within the AGB housing and drives the accessories. Each gear is equipped with two roller bearings.
The sealing is accomplished by rotating seals.
The gear train is contained within the AGB housing and drives the accessories. Each gear is equipped with two roller bearings.
The sealing is accomplished by rotating seals.
(1) Rotating Seal
The four rotating seals assemblies are installed on the AGB housing interface to ensure the oil containment inside the AGB housing assembly. The three rotating seals assemblies are installed on front face and on rear face.
It consists of a rotating seal housing and a mating rotating seal ring. The rotating seals assemblies are mounted on the AGB housing assembly by rotating seal ring.
A rotating seal assembly uses a carbon seal with grooves that act as a pump and create an air film that the mating rotating seal ring surface will ride on.
The four rotating seals assemblies are installed on the AGB housing interface to ensure the oil containment inside the AGB housing assembly. The three rotating seals assemblies are installed on front face and on rear face.
It consists of a rotating seal housing and a mating rotating seal ring. The rotating seals assemblies are mounted on the AGB housing assembly by rotating seal ring.
A rotating seal assembly uses a carbon seal with grooves that act as a pump and create an air film that the mating rotating seal ring surface will ride on.