MAN B&W
1.06
Page 3 of 7
MAN Diesel
198 74 728.0
MAN B&W S50MC/MC-C-TII, S46MC-C-TII, S42MC-TII,
S35MC-TII, L35MC-TII, S26MC-TII
The piston is made as an integrated collar on the
main crank journal, and the housing is fixed to
the main bearing support. For functional check of
the vibration damper a mechanical guide is fitted,
while an electronic vibration monitor can be sup-
plied as an option.
Tuning Wheel/
Torsional Vibration Damper
A tuning wheel or torsional vibration damper may
have to be ordered separately, depending on the
final torsional vibration calculations.
Connecting Rod
The connecting rod is made of forged steel and
provided with bearing caps for the crosshead and
crankpin bearings.
The crosshead and crankpin bearing caps are se-
cured to the connecting rod with studs and nuts
tightened by means of hydraulic jacks.
The crosshead bearing consists of a set of
thinwalled steel shells, lined with bearing metal.
The crosshead bearing cap is in one piece, with
an angular cutout for the piston rod.
The crankpin bearing is provided with thinwalled
steel shells, lined with bearing metal. Lube oil is
supplied through ducts in the crosshead and con-
necting rod.
Piston
The piston consists of a piston crown and piston
skirt. The piston crown is made of heatresistant
steel. A piston cleaning ring located in the very
top of the cylinder liner scrapes off excessive ash
and carbon formations on the piston topland.
The piston has four ring grooves which are
hardchrome plated on both the upper and lower
surfaces of the grooves. The uppermost piston
ring is of the Controlled Pressure Relief type (CPR),
whereas the other three piston rings all have an
oblique cut. All four rings are alu-coated on the
outer surface for running-in.
The piston skirt is made of cast iron with a bronze
band.
Piston Rod
The piston rod is of forged steel and is surface-
hardened on the running surface for the stuffing
box. The piston rod is connected to the cross-
head with four bolts. The piston rod has a central
bore which, in conjunction with a cooling oil pipe,
forms the inlet and outlet for cooling oil.
Crosshead
The crosshead is of forged steel and is provided
with cast steel guide shoes of low-friction design
with white metal on the running surface.
The telescopic pipe for oil inlet and the pipe for oil
outlet are mounted on the guide shoes.
Scavenge Air System
The air intake to the turbocharger takes place
directly from the engine room through the turbo-
charger intake silencer. From the turbocharger,
the air is led via the charging air pipe, air cooler
and scavenge air receiver to the scavenge ports
of the cylinder liners, see Chapter 14.
Scavenge Air Cooler
For each turbocharger a scavenge air cooler of
the monoblock type is fitted. The cooler is de-
signed as a central cooling system cooled by
freshwater of maximum 4.5 bar working pressure.
Alternatively, a seawater cooling system with up to
2.0 2.5 bar working pressure
can be chosen.
The scavenge air cooler is so designed that the
difference between the scavenge air temperature
and the water inlet temperature at specified MCR
can be kept at about 12 °C.
Summary of Contents for B&W S50MC-C8-TII
Page 4: ......
Page 10: ......
Page 18: ......
Page 19: ...MAN B W MAN Diesel Engine Design 1 ...
Page 20: ......
Page 35: ...MAN B W MAN Diesel Engine Layout and Load Diagrams SFOC 2 ...
Page 36: ......
Page 52: ......
Page 64: ......
Page 65: ...MAN B W MAN Diesel Turbocharger Selection Exhaust Gas By pass 3 ...
Page 66: ......
Page 72: ......
Page 73: ...MAN B W MAN Diesel Electricity Production 4 ...
Page 74: ......
Page 106: ......
Page 107: ...MAN B W MAN Diesel Installation Aspects 5 ...
Page 108: ......
Page 146: ......
Page 170: ......
Page 171: ...MAN B W MAN Diesel List of Capacities Pumps Coolers Exhaust Gas 6 ...
Page 172: ......
Page 192: ......
Page 193: ...MAN B W MAN Diesel Fuel 7 ...
Page 194: ......
Page 208: ......
Page 209: ...MAN B W MAN Diesel Lubricating Oil 8 ...
Page 210: ......
Page 223: ...MAN B W MAN Diesel Cylinder Lubrication 9 ...
Page 224: ......
Page 233: ...MAN B W MAN Diesel Piston Rod Stuffing Box Drain Oil 10 ...
Page 234: ......
Page 236: ......
Page 237: ...MAN B W MAN Diesel Central Cooling Water System 11 ...
Page 238: ......
Page 243: ...MAN B W MAN Diesel Seawater Cooling System 12 ...
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Page 254: ......
Page 255: ...MAN B W MAN Diesel Starting and Control Air 13 ...
Page 256: ......
Page 262: ......
Page 263: ...MAN B W MAN Diesel Scavenge Air 14 ...
Page 264: ......
Page 276: ......
Page 277: ...MAN B W MAN Diesel Exhaust Gas 15 ...
Page 278: ......
Page 292: ......
Page 293: ...MAN B W MAN Diesel Engine Control System 16 ...
Page 294: ......
Page 309: ...MAN B W MAN Diesel Vibration Aspects 17 ...
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Page 325: ...MAN B W MAN Diesel Monitoring Systems and Instrumentation 18 ...
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Page 349: ...MAN B W MAN Diesel Dispatch Pattern Testing Spares and Tools 19 ...
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Page 389: ...MAN B W MAN Diesel Project Suppport and Documentation 20 ...
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Page 399: ...MAN B W MAN Diesel Appendix A ...
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