Doosan DP158L Series, Руководство по эксплуатации и техническому обслуживанию

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9. Intake/exhaust system
140
Function
1. Turbine
The exhaust gas that is discharged from combustion
chamger 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
dissipator.
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 force is applied to the turbine wheel and
an arrangement is made for the shaft not to shift.
2) journal bearing (floating bearing) is adopted and it forms
the double oil films at the in out 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 slip-
ping speed on the bearing surface less than the rotaing
speed of shaft so that the dynamic stability may be
obtained.
4. Sealing at compressor shaft
Inorder for the compressed intake air and lubricating oil
not to leak, a seal plate and a seal ring are made to the
double structures.
DV2213109A_E
DV2213110A_E
T urbine Wheel
Exhaust gas
outlet
Suction air
inlet
C ompact wheel
Exhaust gas
inlet
C ompresse d air suppl y
Engine
c
y lin d er
C ompressor
Exhaust gas
outlet
T urbine
Intake air
inlet
Exhaust gas passage
C ompresse d air passage