WÄRTSILÄ Vasa R22, Instruction Manual

Page: 184 / 297

15. Turbocharging and Air Cooling
15.1 Turbocharger
15.1.1 Description
The turbochargers are of the axial turbine type. The insert type
charge air cooler is mounted in a welded housing which, at the
same time, serves as a bracket for the turbocharger. 12 and 16
cylinder V-engines have two identical cooler inserts in a common
housing.
The turbocharger is cooled with water and connected to the
engine cooling system. The turbocharger has a lubricating oil
system of its own.
The air outlet casing is connected to the air duct and the exhaust
pipes to the gas inlet casing through metal bellows. The exhaust
pipe after the turbocharger should be arranged according to the
installation instructions.
Turbocharger and air cooler
Turbochargers for engines running on heavy fuel (22HF and
22HE) are equipped with cleaning devices for washing by water
of the compressor and the turbine.
Turbochargers for engines running on marine diesel fuel (22MD)
are equipped with cleaning devices for washing by water of the
compressor.
1
A
A
A - A
2
7
3
4
6
5
1. Bellows
2. Air duct
3. Air vent screw
4. Water box
5. Water box
6. Draining pipe
7. Hole for the
lifting tool
Fig 15-1
2215519212
22-8604 Turbocharging and Air Cooling 15/III
VTR 161-251 Turbochargers 15 - 1