Wartsila ?31DF Series, Product Manual

Page: 195 / 216

● 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 17-3
17. Power Transmission Wärtsilä 31DF Product Guide