Cylinder Cover
The cylinder cover is of forged steel, made in one
piece, and has bores for cooling water. It has a
central bore for the exhaust valve, and bores for
the fuel valves, a starting valve and an indicator
valve.
The cylinder cover is attached to the cylinder
frame with studs and nuts tightened with hydrau-
lic jacks.
Crankshaft
The crankshaft is of the semibuilt type, made
from forged or cast steel throws. At the aft end,
the crankshaft is provided with the collar for the
thrust bearing, a ange for tting the gear wheel
for the stepup gear to the hydraulic power sup-
ply unit if tted on the engine, and the ange for
the turning wheel and for the coupling bolts to an
intermediate shaft.
At the front end, the crankshaft is tted with the
collar for the axial vibration damper and a ange
for the tting of a tuning wheel. The ange can
also be used for a Power Take Off, if so desired.
Coupling bolts and nuts for joining the crankshaft
together with the intermediate shaft are not nor-
mally supplied.
Thrust Bearing
The propeller thrust is transferred through the
thrust collar, the segments, and the bedplate, to
the end chocks and engine seating, and thus to
the ship’s hull.
The thrust bearing is located in the aft end of the
engine. The thrust bearing is of the B&WMichell
type, and consists primarily of a thrust collar on
the crankshaft, a bearing support, and segments
of steel lined with white metal. The thrust shaft is
an integrated part of the crankshaft and it is lubri-
cated by the engine’s lubricating oil system.
Stepup Gear
In case of engine driven HPS, the hydraulic oil
pumps are mounted on the aft of the engine, and
are driven from the crankshaft via stepup gear.
The stepup gear is lubricated from the main engine
system.
Turning Gear and Turning Wheel
The turning wheel is tted to the thrust shaft, and
it is driven by a pinion on the terminal shaft of the
turning gear, which is mounted on the bedplate.
The turning gear is driven by an electric motor
with builtin gear with brake.
A blocking device prevents the main engine from
starting when the turning gear is engaged. En-
gagement and disengagement of the turning gear
is effected manually by an axial movement of the
pinion.
The control device for the turning gear, consisting
of starter and manual control box, can be ordered
as an option.
Axial Vibration Damper
The engine is tted with an axial vibration damper,
mounted on the fore end of the crankshaft. The
damper consists of a piston and a splittype
housing located forward of the foremost main
bearing. The piston is made as an integrated col-
lar on the main journal, and the housing is xed to
the main bearing support.
Tuning Wheel / Torsional Vibration Damper
A tuning wheel or torsional vibration damper may
have to be ordered separately, depending on the
nal torsional vibration calculations.
To Next Page
Loading...
Need help?
General