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7/25/2019 Lubricating Oil System
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© Adi Wirawan Husodo
2014
Course-8. General Shipboard System
Lubricating Oil System
Lecturer : Adi Wirawan Husodo, ST, MT
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© Adi Wirawan Husodo
2014
Reference:
• Japan Marine Engineering Society, Machinery
Outfitting Design Manual, vol.1: Piping System for
Diesel Ships, 1982.
• Engine Project Guides.
• H.J. Cassee, Piping System, Marine Engineering,Chapter XX, SNAME
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© Adi Wirawan Husodo
2014
What?
• Lubricating oil in the machinery system acts to
minimize friction on the surface of the moving
components.
• Lubricating oil also functions as a cooling fluid on
some motors.• Lubrication system is also used for cooling and
lubrication of the engine bearings, piston cooling, and
so on.
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© Adi Wirawan Husodo
2014
Type
• Uni Lubricating Oil System
– System that lubricates the moving parts of the engine-part,
such as: crank shaft, main bearings, journal bearings, cam
shafts, pistons, connecting rods, exhaust valve actuator and
the other moving parts other than the cylinder .
• Cylinder Lubricating Oil System
– Specific lubrication system which lubricates the engine
cylinder using the principle of gravity
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© Adi Wirawan Husodo
2014
Uni Lubricating Oil System
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Refer to:
MAN S26 MC
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© Adi Wirawan Husodo
2014
Uni Lubricating Oil System
• LO System
– Cooling, filtering, and supplying LO to M/E (bearings,
camshaft, exhaust valve actuator, piston)
– Sump tankLO pumpLO coolerfull-flow filterEngine
sump tank
• LO Purifying System
– Purifying LO for recirculation
– Sump tankfilterLO pumppre-heater purifier
sump tank or LO service tank
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© Adi Wirawan Husodo
2014
LO system’s Components
• LO bottom tank (sump tank)
– Location: below m/e;
– Volume: ref to project guide, f(no. of cylinder);
– Drain location: engine;
–
Cofferdams must be provided surroundings;• LO pipes
– Schedule : 40 or 80 (3rd or 2nd class);
– Diam: according to Q (project guide) and V (typically 1.5 m/s
1.8 m/s);
–
No passing through: ballast, FW, and feed water tanks; – Usually galvanized (recommended);
– Minimum pipe thickness should refer to Class.
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© Adi Wirawan Husodo
2014
LO system’s Components
• LO PUMP – To circulate the LO from Bottom Tank (Sump Tank) to engine
and back again to Bottom Tank (Sump Tank);
– Type : screw atau gear pump with sufficient Q and Pressure ;
– Location: tank top (closest possible to LO tank);
– Q = Ref to project guide (depends on BHP); – Vflow = refer to engine Project Guide (typically max 1.8 m/s);
– Head total = ΔHz + ΔHp + total Head loss;
– Hz = elevation of (tank – inlet on engine);
– Hp = delivery pressure (ref to Project Guide , typically 4 bar)
– H loss tot = H friction + H loss accessories;
– Accessories include fittings, valves, filter (HL typically 0.5bar), cooler (typically 0.3 bar).
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© Adi Wirawan Husodo
2014
LO system’s Components
• Lubricating oil cooler
– Is used to cool the LO which exit from the engine.
– Cooling media : SW
– Type: shell and tube or heat plate exchanger
•Separator or Purifier – Is used to purify the LO due to contamination of water
content or sludge which is coming from engine.
• Lubricating oil temperature control valve
– 3-way valve;
–
To by-pass partially or fully LO cooler.
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© Adi Wirawan Husodo
2014
Uni Lubricating Oil System
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l.o. pumpl.o. separator
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© Adi Wirawan Husodo
2014
Uni Lubricating Oil System
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l.o. cooler attached on sideplate
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© Adi Wirawan Husodo
2014
Uni Lubricating Oil System
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l.o. service tank (onplatform)
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2014
Cylinder Lubricating Oil System
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2014
Thank You
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