DL06K Interim Tire-4 Diesel Engine Maintenance of Major Components
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5.3.3. Function
1) Turbine
The exhaust gas that is discharged from combustion chamber passes through
turbine housing conveying an energy to turbine wings to give the rotating power,
This is called as the turbine and in order not to influence a bad effect at bearing part,
there are the seal ring and heat protector.
2) Compressor
It is connected to the same shaft with the turbine to make a revolving assembly, and
receive the revolving force of turbine, and sends air to the suction manifold by
suctioning and compressing it. This is called as the compressor.
3) Bearing
(1) Thrust bearing
Thrust bearing force is applied to the turbine wheel and an arrangement is made
for the shaft not to shift.
(2) Journal bearing
Journal bearing (floating bearing) is adopted and it forms the double oil films at
the inner and outer surfaces in comparison to the general stationary type so that
the bearing may be able to rotate independently and consequently the double
layers of films act as the damper to make the slipping speed on the bearing
surface less than the rotating speed of shaft so that the dynamic stability may be
obtained.
4) Sealing at compressor shaft
In order for the compressed intake air and lubricating oil not to leak, a seal plate and
a seal ring are made to the double structures.
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