DOC AIRBUS | AMM A320FFAN AND BOOSTER MODULE - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The fan and booster module assembly consists of a single-stage fan rotor and a 3-stage axial booster, cantilever-mounted at the rear of the fan disk.
The fan and booster assembly is made up of the major parts as follows:
** ON A/C NOT FOR ALL The fan and booster module assembly consists of a single-stage fan rotor and a 3-stage axial booster, cantilever-mounted at the rear of the fan disk.
The fan and booster assembly is made up of the major parts as follows:
- Front spinner
- Platform front shroud
- Fan blades and platforms
- Fan disk
- Booster rotor
- Booster vane assemblies.
2. System Description
A. Front Spinner
The front spinner is attached to the front platform shroud by nine screws. It is made of anodized aluminum alloy protected by anti-erosion paint. The design of the front spinner avoids ice production.
The front spinner features one hole offset at 12 o'clock and a clock position mark at the rear face in contact with the front platform shroud.
The front spinner is attached to the front platform shroud by nine screws. It is made of anodized aluminum alloy protected by anti-erosion paint. The design of the front spinner avoids ice production.
The front spinner features one hole offset at 12 o'clock and a clock position mark at the rear face in contact with the front platform shroud.
B. Front Platform Shroud
The front platform shroud receives the balance weights, used to balance the engine assembly. It locks platforms and fan blades spacers.
The shroud is positioned with one hole offset.
It features a 12 o'clock position round mark on the flow path profile to localize the No. 1 fan blade position.
The front platform shroud receives the balance weights, used to balance the engine assembly. It locks platforms and fan blades spacers.
The shroud is positioned with one hole offset.
It features a 12 o'clock position round mark on the flow path profile to localize the No. 1 fan blade position.
C. Fan Blades
The 18 fan blades wide chord are made of 3D woven composite material with titanium leading edge and painting protection. It features black painting beige primaire and polyurethane coating on the concave side and painting, beige primer on the convex side.
Fan blades are separated from others by 18 platforms that ensure vane continuity with front spinner and front platform shroud.
Each fan blade is radially maintained in fan disk slot position by a spacer and axially by a lock.
The fan blade root features bonded wear strips located at the dovetail pressure face with fan disk slots leading unnecessary lubrication of the fan blades.
Two other wear strips are located forward and rearward of the dovetail to protect for contact with axial lock and booster spool.
Two other wear strips are located in the area of contact with platform to protect fan blade surface from platform seals contact.
The fan blade dimensions are approximately 31.10 in. (0.79 m) in length, 14.57 in. (0.37 m) in width and its weight is about 12.46 lb (5.65 kg).
The 18 fan blades wide chord are made of 3D woven composite material with titanium leading edge and painting protection. It features black painting beige primaire and polyurethane coating on the concave side and painting, beige primer on the convex side.
Fan blades are separated from others by 18 platforms that ensure vane continuity with front spinner and front platform shroud.
Each fan blade is radially maintained in fan disk slot position by a spacer and axially by a lock.
The fan blade root features bonded wear strips located at the dovetail pressure face with fan disk slots leading unnecessary lubrication of the fan blades.
Two other wear strips are located forward and rearward of the dovetail to protect for contact with axial lock and booster spool.
Two other wear strips are located in the area of contact with platform to protect fan blade surface from platform seals contact.
The fan blade dimensions are approximately 31.10 in. (0.79 m) in length, 14.57 in. (0.37 m) in width and its weight is about 12.46 lb (5.65 kg).
D. Fan Blade Platform
PRE SB 72-0080
The fan blade platforms are made of composite material with painting protection. They are installed between the fan blades and held free by front platform shroud at the forward side and booster spool at the rear side.
END OF PRE SB 72-0080
POST SB 72-0080
The fan blade platforms are made of composite material with painting protection. They are installed between the fan blades and held free by front platform shroud at the forward side and the rotating ring spacer at the rear side.
END OF POST SB 72-0080
PRE SB 72-0080
The fan blade platforms are made of composite material with painting protection. They are installed between the fan blades and held free by front platform shroud at the forward side and booster spool at the rear side.
END OF PRE SB 72-0080
POST SB 72-0080
The fan blade platforms are made of composite material with painting protection. They are installed between the fan blades and held free by front platform shroud at the forward side and the rotating ring spacer at the rear side.
END OF POST SB 72-0080
E. Fan Blade Spacer
The fan blade spacer is made of 3D carbon layer. It is lightly bent to function as a spring to maintain radially fan blades in position within fan disk slots.
The fan blade spacer is made of 3D carbon layer. It is lightly bent to function as a spring to maintain radially fan blades in position within fan disk slots.
F. Fan Blades Lock
The fan blade lock is made of titanium plate with honeycomb bonded structure covered by a 0.015 in. (0.38 mm) nickel base metallic plate.
Its function is to lock the fan blade axially with honeycomb, as a damping function for fan blade.
The fan blade lock is made of titanium plate with honeycomb bonded structure covered by a 0.015 in. (0.38 mm) nickel base metallic plate.
Its function is to lock the fan blade axially with honeycomb, as a damping function for fan blade.
G. Fan Disk
The fan disk is a titanium alloy forging. Its inner rear flange provides attachment for the booster shaft.
The rear face of the disk features an outer rear flange bolted to the booster spool and a centering diameter fretted on the booster spool forward inner diameter.
The outer front flange supplies recess for barrel nuts dedicated to the attachment of the front platform shroud.
It has 18 straight recesses (dovetail slots) for installation of the fan blades.
The outer rear flange is attached to the booster spool by 18 D head bolts able to feature balance weights for fan and booster balancing.
Each fan disk rim features a shield for wear protection with fan blade dovetail contact.
The fan disk is a life limited part.
The fan disk is a titanium alloy forging. Its inner rear flange provides attachment for the booster shaft.
The rear face of the disk features an outer rear flange bolted to the booster spool and a centering diameter fretted on the booster spool forward inner diameter.
The outer front flange supplies recess for barrel nuts dedicated to the attachment of the front platform shroud.
It has 18 straight recesses (dovetail slots) for installation of the fan blades.
The outer rear flange is attached to the booster spool by 18 D head bolts able to feature balance weights for fan and booster balancing.
Each fan disk rim features a shield for wear protection with fan blade dovetail contact.
The fan disk is a life limited part.
H. Fan Disk Shield
The fan disk shield is made of Inconel 718. It is designed to reduce fretting with the fan blade root.
The fan disk shield is made of Inconel 718. It is designed to reduce fretting with the fan blade root.
I. Booster Rotor
The booster rotor is composed of:
The booster rotor is composed of:
- Booster spool
- Blades
- Rotating ring spacer.
(1) Booster Spool
The booster spool is forged and machined from titanium alloy and is cantilever-mounted on the rear of the fan disk. The inner front flange bolted to the fan disk, acts as a stop for the fan blades.
The 3-stage booster spool has circumferential dovetail slots that retain the stages 2, 3 and 4 blades, the blade locks and the balance weights.
The booster spool is forged and machined from titanium alloy and is cantilever-mounted on the rear of the fan disk. The inner front flange bolted to the fan disk, acts as a stop for the fan blades.
The 3-stage booster spool has circumferential dovetail slots that retain the stages 2, 3 and 4 blades, the blade locks and the balance weights.
(2) Blades
The blades are regularly mixed between width and narrow in order to adjust fitting within the spool slots. The four blades lock are specific due to lock.
The blades serve primarily to supercharge the HP compressor. Blades are held in the dovetail slots by locks.
The blades are distributed as follows:
PRE SB 72-0080
POST SB 72-0080
POST SB 72-0080
The blades are regularly mixed between width and narrow in order to adjust fitting within the spool slots. The four blades lock are specific due to lock.
The blades serve primarily to supercharge the HP compressor. Blades are held in the dovetail slots by locks.
The blades are distributed as follows:
PRE SB 72-0080
- 62 blades in stage 2
- 75 blades in stage 3
- 72 blades in stage 4.
POST SB 72-0080
- 67 blades in stage 2
- 85 blades in stage 3
- 80 blades in stage 4.
POST SB 72-0080
(3) Rotating Ring Spacer
The rotating ring spacer is a one piece shroud in titanium alloy. It closes the cavity between the fan blades and the booster inlet. The rotating ring spacer is used to support the aft end of the fan blade platforms.
The rotating ring spacer is fretted and bolted to a forward flange of the booster spool by 36 bolts.
END OF POST SB 72-0080
The rotating ring spacer is a one piece shroud in titanium alloy. It closes the cavity between the fan blades and the booster inlet. The rotating ring spacer is used to support the aft end of the fan blade platforms.
The rotating ring spacer is fretted and bolted to a forward flange of the booster spool by 36 bolts.
END OF POST SB 72-0080
J. Booster Vane Assemblies
The stacked booster vane assemblies are cantilever-mounted on the fan frame front face. The entire assembly is composed of four stages of similar design.
Stage 1, 2, 3 and 4 stator vanes are welded to the outer shroud.
The other ends of stator vanes are inserted through slots provided inside inner shroud rings and are linked to the inner shroud rings by abradable silicone and retainer plates.
PRE SB 72-0080
The stage 1 to 4 vane assemblies inner shrouds are made of titanium material.
END OF PRE SB 72-0080
POST SB 72-0080
The stage 1 and 4 vane assemblies inner shrouds are made of titanium material. The stage 2 and 3 vane assemblies inner shrouds are made of composite material.
END OF POST SB 72-0080
Stage 2, 3 and 4 outer shrouds have abradable plasma tracks in front of booster rotating blades to seal compressor stages.
The four vanes outer shrouds are assembled by their flanges with bolts.
PRE SB 72-0080
The stage 1 vane assembly has 94 vanes, stage 2 vane assembly has 112 vanes, stage 3 vane assembly has 112 vanes and stage 4 vane assembly has 96 vanes.
END OF PRE SB 72-0080
POST SB 72-0080
The stage 1 vane assembly has 82 vanes, stage 2 vane assembly has 126 vanes, stage 3 vane assembly has 126 vanes and stage 4 vane assembly has 106 vanes.
END OF POST SB 72-0080
The outer shroud of the stage 2 and 3 vane assemblies has a port at the 4 o'clock position for borescope inspection.
The booster seals improve the airflow efficiency by the following sealing concept:
The stacked booster vane assemblies are cantilever-mounted on the fan frame front face. The entire assembly is composed of four stages of similar design.
Stage 1, 2, 3 and 4 stator vanes are welded to the outer shroud.
The other ends of stator vanes are inserted through slots provided inside inner shroud rings and are linked to the inner shroud rings by abradable silicone and retainer plates.
PRE SB 72-0080
The stage 1 to 4 vane assemblies inner shrouds are made of titanium material.
END OF PRE SB 72-0080
POST SB 72-0080
The stage 1 and 4 vane assemblies inner shrouds are made of titanium material. The stage 2 and 3 vane assemblies inner shrouds are made of composite material.
END OF POST SB 72-0080
Stage 2, 3 and 4 outer shrouds have abradable plasma tracks in front of booster rotating blades to seal compressor stages.
The four vanes outer shrouds are assembled by their flanges with bolts.
PRE SB 72-0080
The stage 1 vane assembly has 94 vanes, stage 2 vane assembly has 112 vanes, stage 3 vane assembly has 112 vanes and stage 4 vane assembly has 96 vanes.
END OF PRE SB 72-0080
POST SB 72-0080
The stage 1 vane assembly has 82 vanes, stage 2 vane assembly has 126 vanes, stage 3 vane assembly has 126 vanes and stage 4 vane assembly has 106 vanes.
END OF POST SB 72-0080
The outer shroud of the stage 2 and 3 vane assemblies has a port at the 4 o'clock position for borescope inspection.
The booster seals improve the airflow efficiency by the following sealing concept:
- Abradable silicone material layers supported by the vanes inner shroud.
- Sealing teeth machined on the booster spool, facing the vanes inner shroud.
- Abradable plasma material supported by vane outer shroud ahead of the vanes to minimize clearance with blades tips.
- An O-ring located inside a specific groove machined within the booster spool under each blade platform to seal the three stages of booster blade.
K. Flow Splitter System
The flow splitter system is composed of:
The flow splitter system is composed of:
- Flow splitter
- Flowpath fairing
- Two half flowpath rings.
(1) Flow Splitter
The flow splitter is a one piece titanium part dedicated to separate primary and second airflow path and to avoid ice accumulation.
It features six holes for connecting with the anti-ice feeding tubes and heated by hot gas evacuation ejected by the 188 notches.
The flow splitter is bolted to the No. 1 and No. 2 stator flanges of the booster by 36 bolts.
The flow splitter is a one piece titanium part dedicated to separate primary and second airflow path and to avoid ice accumulation.
It features six holes for connecting with the anti-ice feeding tubes and heated by hot gas evacuation ejected by the 188 notches.
The flow splitter is bolted to the No. 1 and No. 2 stator flanges of the booster by 36 bolts.
(2) Flowpath Fairing
The flowpath fairing is a one piece shroud in aluminum material fretted on the flow splitter and fitted within the Outlet Guide Vane (OGV) inner shroud slot with a seal.
The flowpath fairing is a one piece shroud in aluminum material fretted on the flow splitter and fitted within the Outlet Guide Vane (OGV) inner shroud slot with a seal.
(3) Flowpath Rings
The two half flowpath rings are bolted by 10 bolts on the flow splitter to axially retain the flow path fairing.
The two half flowpath rings are bolted by 10 bolts on the flow splitter to axially retain the flow path fairing.
(4) Booster Anti-Ice Tubing
The booster anti-ice system is dedicated to avoid ice accumulation on the booster stage 1 vane. When the booster anti-ice exhaust port is open stage 7 air is ported to the Low Pressure Compressor (LPC) through hoses located between the LPC outer case and flowpath fairing.
The booster anti-ice system is dedicated to avoid ice accumulation on the booster stage 1 vane. When the booster anti-ice exhaust port is open stage 7 air is ported to the Low Pressure Compressor (LPC) through hoses located between the LPC outer case and flowpath fairing.