CFM56-7B Engine Familiarization || Exercise Part-2

Part-2
CFM56-7B Engine General Familiarization (Engine for Boeing 737 Next Generation)

CFM56-7B Contains 5 Main Engine Bearings :
The engine contains five main bearings, which support the rotors.
There are two types of bearings:
• Ball bearings, which absorb axial and radial loads
• Roller bearings, which absorb only radial loads
Bearings need permanent oil lubrication, so they are located in the two dry sump cavities, which are pressure sealed.
The forward sump cavity houses No. 1, No. 2 and No. 3 bearings:
• No. 1 and No. 2 bearings hold the fan shaft
• No. 3 bearing holds the front of the HP shaft
The rear sump cavity houses No. 4 and No. 5 bearings:
• No. 4 bearing holds the rear of the HP shaft
• No. 5 bearing holds the rear of the LPT shaft

Modular Design
The CFM56-7B is a modular concept design engine. It has 17 different modules that are enclosed within three major modules and an accessory drive module.
The 4 modules are:
• Fan Major Module
• Core Engine Major Module
• Low Pressure Turbine Major Module
• Accessory Drive Module

The fan major module is at the front of the engine downstream from the air inlet cowl.
The main purposes of the fan major module are:
• to provide approximately 80% of the engine thrust
• to provide the engine/pylon front attachment
• to enclose the fan stage and Low Pressure Compressor stages
• to provide structural rigidity in the front section
• to provide containment for front section major deterioration and/or damage
• to provide noise reduction for the fan section
• to provide attachment for gearboxes and nacelle equipment
• to provide attachment for the core engine

The fan major module consists of 4 modules:
• Fan and booster module
• No.1 and 2 bearing support module
• Fan frame module
• Inlet gearbox and No.3 bearing.

The purposes of the fan and booster are:
• to accelerate air overboard to generate thrust
• to increase the pressure of the air directed to the High Pressure Compressor (HPC)
After entering the air inlet cowl, the total engine airflow passes through the fan rotor, which increases the air's kinetic energy.
Most of the airflow is ducted overboard producing approximately 80% of the total thrust. The remainder is directed through the booster, where it is pressurized before entering the HPC.

#CFM56-7B
#engine
#boeing737

Exercise Part-1
https://youtu.be/8IuMJVZv4Y8
Exercise Part-2
https://youtu.be/lf__gxt-w34
Exercise Part-3
https://youtu.be/UDzQfny50YE
Exercise Part-4
https://youtu.be/Y33vIgQq5Dc
Exercise Part-5
https://youtu.be/o4nr5aKrTcc

Thank You ..