Scania DI16 Engine Installation Manual

Online PDF Scania DI16 Engine Installation Manual

The type of engine suspension that is appropriate varies for different engine installations. In general, the following applies:
-The engine suspension should be designed for the forces it is exposed to, both continuously and momentarily during operation. Such forces are reaction forces from the transmitted torque and in some cases longitudinal acceleration, retardation and reaction forces in the engine.
-For engines with marine transmission, Scania recommends a 6-point suspension or common rear suspension for pipes, transmission and engine.
-Both the engine suspension and the engine bed should be designed so that there are no resonant oscillations within the engine speed range. They should also be designed so that annoying vibrations from the engine are not transmitted to the surroundings.
-The engine suspension and engine bed should be designed in a manner which allows access for maintenance and repair work.
-The engine bed location and the engine suspension must be designed so that the permissible angles of inclination for the engine are not exceeded. See the table Permissible installation and operating angles.

List Of Contents
Engine suspension. ....3
Design requirements. ............ 3 
Flexible engine suspension. .. 4 
Rigid engine suspension. ...... 6 
Suspension of reverse gear. .. 7 
Permissible installation and operating angles . ..... 8 
Flywheel housings. ............... 9 
Lifting the engine . .............. 10 
Engine bed. ......... 10
Accessibility for maintenance and repairs . ..........11
Installation requirements. ... 11 
Clearances . ......... 13
Engine alignment. ...14
Flexible coupling. ............... 15 
Aligning engine and shafts.  16
Power transmission . ...............21
Flexible coupling. ............... 21 
Friction clutch . ... 22
Transmission types. 23
Mechanical transmissions . . 23 
Belt transmissions . ............. 23
Power take-offs . ......25
Front-mounted power take-offs. ..... 25 
Side-mounted power take-offs . ...... 27
Connection of sensors for external monitoring systems . ........34
DI09 and DI13. ... 35 
DI16. ................... 37
Torsional oscillations . ............ 39
Data for torsional oscillation calculation. ........... 39 
Torsional oscillation calculations from Scania. .. 40
General tightening torques for screw joints . ....... 42
Specification of normal tightening torques. ........ 42
Tightening torques. ............. 43

Flexible engine suspension dampens vibrations more effectively than rigid engine suspension. It prevents extreme movement between engine and engine bed during violent ship movement. Flexible engine suspension can also absorb some level of reaction force from the propeller. Flexible engine suspension does not require such careful alignment of the engine as rigid engine suspension.
However, flexible engine suspension does not absorb longitudinal and lateral forces in the engine to the same extent as rigid engine suspension.

A rigid engine suspension can absorb greater forces in all directions than flexible engine suspension. It requires highly accurate alignment of the engine in relation to the driven unit. On the other hand, it requires no special flexibility in the hoses, pipes and controls connected to the engine.
A rigid engine suspension can be used in engine installations where vibration causes no significant problems and where other characteristics make it desirable.
Even with a rigid engine suspension, the transmission of vibration to the engine bed can be kept low if the masses of the engine bed and connected parts are large in relation to the mass of the engine.
It is also possible to construct flexible engine suspension between the frame and the engine bed to reduce the transmission of vibration to the engine bed.

Online PDF Scania DI16 Engine Installation Manual

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