1. Accessory Drive/Gearbox Assembly

3. n 4 n 1 T1 T1 Gears Law T4 If T = No. of Gear Teeth n = RPM of Gear
Find T4
n 4
= 2000 rpm T4
n 1
= 400 rpm T3 T2 T1 T1
= 100 teeth
Gears Law

4. n 1 n 4 = n 1 n 4 n1 = n4 = T4 T3 n3 n4 T3 T2 n2 n3 T2 T1 n1 n2 T4 T3X T3 T2 T2 T1 X n3 n4 n2 n3 X n1 n2 X = =
n 1
n 4 T4 T1
n 1
= rpm
n 4
= rpm T4 = n1 T1 X n4 T1
= teeth T4 =
400
2000
100 X
20 Teeth

5. Main Lube oil
AC. Lube oil
DC. Lube oil

6. LUBE OIL SYSTEM Lube Oil Drain Header To Main Lube Oil Reservoir
To Lube Oil Reservoir
LUBE OIL
SYSTEM
Rundown Tank
7000 mm Above
Machine C/L
Lube Supply Oil Header
Starter Motor
COMPRESSOR
Starter motor will be disconnected at about 65% of the max. operating speed
Gas Turbine
HS.C
Gear
Box
Lube Oil Drain Header
To Main Lube Oil Reservoir 6

9. Cooling Air to the Turbine Blades
Air to cool the Turbine Blades
Turbine Shaft
Compressor Air

13. Combustion chamber Atomizing air Primary air Secondary air Sealing air
Fuel
Atomizing air
Primary air
Secondary air
Sealing air
Cooling air
Bleeding air

14. Atomizing air
Combustion
chamber
Fuel

15. Atomizing air
Combustion
chamber
Fuel

17. Types of Combustion Chambers
Three types of combustion chambers are used in gas turbines:
- Single combustion chamber
- Annular combustor
- Can annular combustor (several combustion chambers)
Single combustion chamber

18. 2-Annular Combustor The annular combustor's combustion chamber
completely surrounds
the shaft.
Fuel nozzles are inserted
into the annular chamber
at various points around
the chamber’s perimeter

19. Annular combustion chamber (annular combustor)
Side view Axial view
Annular combustion chamber (annular combustor)

20. 3-Multi - Can-Annular Combustor