Turning Gear - Wartsila ?31DF Series Product Manual

Wärtsilä 31DF Product Guide
● Generator output, speed and sense of rotation
● Mass moment of inertia of all rotating parts or a total inertia value of the rotor, including
the shaft
● Torsional stiffness or dimensions of the shaft
● Material of the shaft including tensile strength and modulus of rigidity
● Drawing number of the diagram or drawing
Flexible coupling/clutch
If a certain make of flexible coupling has to be used, the following data of it must be informed:
● Mass moment of inertia of all parts of the coupling
● Number of flexible elements
● Linear, progressive or degressive torsional stiffness per element
● Dynamic magnification or relative damping
● Nominal torque, permissible vibratory torque and permissible power loss
● Drawing of the coupling showing make, type and drawing number
Operational data
● Operational profile (load distribution over time)
● Clutch-in speed
● Power distribution between the different users
● Power speed curve of the load
17.6

Turning gear

The engine is equipped with an electrical driven turning gear, capable of turning the flywheel
and crankshaft.
DBAE248994
17. Power Transmission
17-3