MAN B&W
4.04
Page 2 of 3
MAN Diesel
198 43 168.8
MAN B&W 70 – 26 engines
combinator mode. This will, however, require an
additional RENK Constant Frequency gear (Fig.
4.01.01 alternative 2) or additional electrical equip-
ment for maintaining the constant frequency of
the generated electric power.
Tunnel gear with hollow flexible coupling
This PTO system is normally installed on ships
with a minor electrical power take off load com-
pared to the propulsion power, up to approxi-
mately 25% of the engine power.
The hollow flexible coupling is only to be dimensioned
for the maximum electrical load of the power take off
system and this gives an economic advantage for minor
power take off loads compared to the system with an
ordinary flexible coupling integrated in the shaft line.
The hollow flexible coupling consists of flexible
segments and connecting pieces, which allow
replacement of the coupling segments without
dismounting the shaft line, see Fig. 4.04.02.
Fig. 4.04.02: Generic outline of BW IV/GCR, tunnel gear
178 18 250.1
Generator stepup gear and flexible coupling
integrated in the shaft line
For higher power take off loads, a generator
stepup gear and flexible coupling integrated in
the shaft line may be chosen due to first costs of
gear and coupling.
The flexible coupling integrated in the shaft line
will transfer the total engine load for both propul-
sion and electrical power and must be dimen-
sioned accordingly.
The flexible coupling cannot transfer the thrust
from the propeller and it is, therefore, necessary
to make the gearbox with an integrated thrust
bearing.
This type of PTO system is typically installed on
ships with large electrical power consumption,
e.g. shuttle tankers.
Summary of Contents for B&W S50ME-B9.3-TII
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Page 11: ...MAN B W MAN Diesel Engine Design 1 ...
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Page 27: ...MAN B W MAN Diesel Engine Layout and Load Diagrams SFOC 2 ...
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Page 53: ...MAN B W MAN Diesel Turbocharger Selection Exhaust Gas By pass 3 ...
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Page 59: ...MAN B W MAN Diesel Electricity Production 4 ...
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Page 93: ...MAN B W MAN Diesel Installation Aspects 5 ...
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Page 133: ...MAN B W MAN Diesel List of Capacities Pumps Coolers Exhaust Gas 6 ...
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Page 155: ...MAN B W MAN Diesel Fuel 7 ...
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Page 171: ...MAN B W MAN Diesel Lubricating Oil 8 ...
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Page 189: ...MAN B W MAN Diesel Cylinder Lubrication 9 ...
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Page 199: ...MAN B W MAN Diesel Piston Rod Stuffing Box Drain Oil 10 ...
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Page 203: ...MAN B W MAN Diesel Central Cooling Water System 11 ...
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Page 209: ...MAN B W MAN Diesel Seawater Cooling System 12 ...
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Page 221: ...MAN B W MAN Diesel Starting and Control Air 13 ...
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Page 227: ...MAN B W MAN Diesel Scavenge Air 14 ...
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Page 239: ...MAN B W MAN Diesel Exhaust Gas 15 ...
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Page 255: ...MAN B W MAN Diesel Engine Control System 16 ...
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Page 265: ...MAN B W MAN Diesel Vibration Aspects 17 ...
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Page 281: ...MAN B W MAN Diesel Monitoring Systems and Instrumentation 18 ...
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Page 307: ...MAN B W MAN Diesel Dispatch Pattern Testing Spares and Tools 19 ...
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Page 323: ...MAN B W MAN Diesel Project Support and Documentation 20 ...
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Page 333: ...MAN B W MAN Diesel Appendix A ...
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