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Mechanical Engineering
- Engineered for Reliability and Performance
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The propeller shaft seal, showing the
conical shrink fit joint
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Only Keyless, Shrink Fit Joints
All joints in the power train are either conical or
cylindrical shrink fit joints. There are no keyways
to deteriorate the integrity of the shafts, nor keys
that may wear and break. |
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The
upper gear box is pressure lubricated
improving the efficiency of the propulsor
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Pressurized
Lubrication of
Upper Gear
The gears and bearings in the upper gearbox are pressure
lubricated, combined with an ejector based oil level
control, keeping the oil level constant irrespective
of oil temeprature. This enables a better control of
the lubrication as well as improves the efficency of
the unit thanks to smaller friction, resulting in less
power loss and heat generation. |
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click on the seals for enlargement
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Triple lip seals on steering tube
The steering tube is sealed using triple lip seals
of Chesterton 10K Monoseal type. The seals are installed
with stainless steel liners to minimize wear. The innermost
seal is turned upwards to minimize the risk of dirt
and particles sticking between the lip and the liners
as it may wear out the seals/liners and cause the seals
to leak. The triple seal assembly enables the facility
to flush the seal chamber of propeller shaft seals (see
below). |
Propeller
Shaft Seals with
Flush Facility
The propeller shaft is sealed using either Simplex,
or IHC Lagersmit three or four ring-type, seals. The
space between the seals is filled with a seal fluid
under the pressure against sea water / lubrication oil
. The pressure is provided with either a header tank
or a pressurized tank. The sealing fluid can be monitored
and flushed. |
