MAN B&W
5.18
Page 4 of 8
MAN Diesel
198 46 953.6
MAN B&W 70-26 engines
If deviation occurs, a proportional valve is actu-
ated. Hereby high pressure oil is fed to one or the
other side of the servo piston, via the oil distribu-
tor ring, until the desired propeller pitch has been
reached.
The pitch setting is normally remote controlled,
but local emergency control is possible.
Fig. 5.18.05: Servo oil system for MAN Alpha VBS type CP propeller
178 22 384.1
Servo oil system for VBS type CP propeller
The design principle of the servo oil system for
MAN Diesel & Turbo’s MAN Alpha VBS type CP
propeller is shown in Fig. 5.18.05.
The VBS system consists of a servo oil tank unit,
the Hydraulic Power Unit, and a coupling flange
with electrical pitch feedback box and oil distribu-
tor ring.
The electrical pitch feedback box continuously
measures the position of the pitch feedback ring
and compares this signal with the pitch order sig-
nal.
Hydraulic Power Unit
Stern
tube oil
tank
Oil tank
forward
seal
Pitch
order
Servo
piston
Lip ring seals
Hydraulic
pipe
Pitch
feedback
Drain
tank
Propeller shaft
Oil distribution
ring
Stern
tube
Monoblock
hub
Zinc
anode
M
M
PSL
PSL
PAL
PAL
PAH
PI
M
M
PI
LAL
TAH
TI
Summary of Contents for B&W S50ME-B9.3-TII
Page 4: ......
Page 10: ......
Page 11: ...MAN B W MAN Diesel Engine Design 1 ...
Page 12: ......
Page 27: ...MAN B W MAN Diesel Engine Layout and Load Diagrams SFOC 2 ...
Page 28: ......
Page 53: ...MAN B W MAN Diesel Turbocharger Selection Exhaust Gas By pass 3 ...
Page 54: ......
Page 58: ......
Page 59: ...MAN B W MAN Diesel Electricity Production 4 ...
Page 60: ......
Page 92: ......
Page 93: ...MAN B W MAN Diesel Installation Aspects 5 ...
Page 94: ......
Page 124: ......
Page 133: ...MAN B W MAN Diesel List of Capacities Pumps Coolers Exhaust Gas 6 ...
Page 134: ......
Page 154: ......
Page 155: ...MAN B W MAN Diesel Fuel 7 ...
Page 156: ......
Page 170: ......
Page 171: ...MAN B W MAN Diesel Lubricating Oil 8 ...
Page 172: ......
Page 188: ......
Page 189: ...MAN B W MAN Diesel Cylinder Lubrication 9 ...
Page 190: ......
Page 199: ...MAN B W MAN Diesel Piston Rod Stuffing Box Drain Oil 10 ...
Page 200: ......
Page 202: ......
Page 203: ...MAN B W MAN Diesel Central Cooling Water System 11 ...
Page 204: ......
Page 209: ...MAN B W MAN Diesel Seawater Cooling System 12 ...
Page 210: ......
Page 220: ......
Page 221: ...MAN B W MAN Diesel Starting and Control Air 13 ...
Page 222: ......
Page 227: ...MAN B W MAN Diesel Scavenge Air 14 ...
Page 228: ......
Page 239: ...MAN B W MAN Diesel Exhaust Gas 15 ...
Page 240: ......
Page 254: ......
Page 255: ...MAN B W MAN Diesel Engine Control System 16 ...
Page 256: ......
Page 265: ...MAN B W MAN Diesel Vibration Aspects 17 ...
Page 266: ......
Page 280: ......
Page 281: ...MAN B W MAN Diesel Monitoring Systems and Instrumentation 18 ...
Page 282: ......
Page 302: ......
Page 306: ......
Page 307: ...MAN B W MAN Diesel Dispatch Pattern Testing Spares and Tools 19 ...
Page 308: ......
Page 322: ......
Page 323: ...MAN B W MAN Diesel Project Support and Documentation 20 ...
Page 324: ......
Page 332: ......
Page 333: ...MAN B W MAN Diesel Appendix A ...
Page 334: ......