WÄRTSILÄ WARTSILA 26, Product Manual

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17. Power Transmission
17.1 Flexible coupling
The power transmission of propulsion engines is accomplished through a flexible coupling or
a combined flexible coupling and clutch mounted on the flywheel. The crankshaft is equipped
with an additional shield bearing at the flywheel end. Therefore also a rather heavy coupling
can be mounted on the flywheel without intermediate bearings.
The type of flexible coupling to be used has to be decided separately in each case on the
basis of the torsional vibration calculations.
In case of two bearing type generator installations a flexible coupling between the engine and
the generator is required.
The following figure gives an indication of flywheel-coupling length based on engine nominal
torque. Changes are possible due to constant development.
Fig 17-1 Connection engine/driven equipment (DAAE026899c)
B [mm] A [mm] Engine
Generating set Main engine
resilient mounting
2)
Main engine
rigid mounting
1)
75 355 470 440 W 6L26
75 355 500 475 W 8L26
75 370 530 475 W 9L26
Wärtsilä 26 Product Guide - a9 - 7 September 2016 17-1
17. Power Transmission Wärtsilä 26 Product Guide