ABB HT469567 Operation Manual page 7

Operation Manual / TPR56-F + TPR61-F
1 Preliminary remarks / 1.2 Layout and function
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Mode of operation
The turbocharger is a turbomachine consisting of two main compon-
ents, a turbine and a compressor. These components are mounted on a
common shaft and form the rotor.
In the turbocharger shown in the illustration, the exhaust gas flows
through the gas inlet casing (06) and the nozzle ring (07) and arrives at
the turbine (08). The turbine utilises the energy contained in the exhaust
gas to drive the rotor. The exhaust gases then escape into the open air
through the gas outlet casing (05) and the exhaust gas pipe connected
to it.
The rotor runs in two radial plain bearings, which are located between
the compressor and the turbine in the bearing bush (04). The axial bear-
ing is also a plain bearing. The plain bearings are connected to a central
lubricating oil duct which is normally supplied by the lubricating oil cir-
cuit of the engine. The oil outlet is situated at the lowest point of the
bearing casing (09).
The compressor wheel (02) connected to the shaft draws in fresh air
through the filter silencer (01) or the air suction branch. The air is com-
pressed in the compressor and the downstream diffuser (03) and then
led to the charge air cooler via the compressor casing (10).
HZTL2490_EN Revision D May 2018