ABB TPS48-H33 Operation Manual page 37

Operation Manual / 4 Product description / TPS44-H.. - TPS52-H..
1 Introduction Page 7 / 99
Mode of operation
The turbocharger is a turbomachine and consists of the following main components:
 Turbine
 Compressor.
These components are installed on a common shaft and form the rotor (see Figure 1).
The exhaust gases of the internal combustion engine flow through the turbine casing (09) and
the nozzle ring (08) onto the turbine (07). The turbine (07) uses the energy contained in the
exhaust gas to drive the rotor and, with this, the compressor wheel (10). The exhaust gases
then reach the atmosphere through the exhaust gas pipe connected to the turbine casing.
The compressor wheel (10) sucks in air or a mixture of gas and air through the air suction
branch (01) or the filter silencer. In the compressor wheel (10), the energy required for building
up the pressure is transferred to the air. By flowing through the diffuser (03) and the compres-
sor casing (02), the air is compressed further and is then directed to the engine cylinders.
The rotor runs in a radial plain bearing bush (06) that is located in the bearing casing (04) be-
tween the compressor and the turbine. The axial thrust bearing (05) is located in front of the
radial plain bearing bush.
The bearings are connected to a central lubricating oil duct which is normally supplied by the
lubricating oil circuit of the engine. The oil outlet lies at the lowest point of the bearing casing
(04).
© Copyright 2016 ABB. All rights reserved. HZTL4037_EN Revision A August 2016