Marine Installation Manual
2021-08
4-104
4 Ancillary Systems
4.12 PTO, PTI, PTH and primary generator applications
X72DF
Table 4
-
19 Influence of options on engineering
Extended TVC
The added components have a considerable influence on the related project-spe
-
cific torsional vibration calculation. Proper case dependent countermeasures
need to be taken depending on the results of the detailed TVC. For further de
-
6.4.2 PTO/PTI systems effect on torsional vibration,
Misfiring detection
Depending on the results of the TVC, a misfiring detection device (MFD) might
be needed to protect the elastic coupling and the gear-train (if present) from inad
-
missible torsional vibrations in case of misfiring.
Impact on ECS
The PTO/PTI /PTH application has to be analysed via the licensee with the
Propulsion Control System supplier and with WinGD for the Engine Control
System.
Shaft alignment study
The added components can have an influence on the alignment layout. The shaft
bearing layout has to be properly selected and adjusted to comply with the given
alignment rules. For further details, refer to section
Bearing load
due to external load
The added components increase the bending moment and the related bearing
loads. The bearing loads have to be checked for compliance with the given rules.
Dynamic conditions
due to external load
The components attached to the free end have to be checked for any influence on
the axial and radial movements of the extension shaft caused by the dynamics of
the engine.
Arrangements (see
Engineering
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9] [10] [11] [12] [13] [14] [15] [16]
Extended TVC
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Misfiring detection
(X) (X) (X) (X)
O
O
O
O
O
O
(X) (X) (X) (X) (X) (X)
Impact on ECS
(X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X) (X)
Shaft alignment
study
(X) (X) (X) (X)
X
X
X
X
X
X
(X) (X) (X) (X)
X
X
Bearing load
due to external load (X) (X) (X) (X)
X
X
X
X
X
X
(X) (X)
X
X
X
X
Dynamic condition
due to external load
O
O
O
O
O
O
O
O
O
O
X
X
X
X
X
X
X
(X)
O
= the arrangement has an influence on this engineering aspect
= the arrangement might have an influence on this engineering aspect
= the arrangement has no influence on this engineering aspect
