Views: 1349 Author: Site Editor Publish Time: 2020-04-01 Origin: Site
Propulsion System Stem Arrangement
For marine propulsion system with engine accessories, control system, steering system, stem arrangement and ventilation blowers
complete for Light Aluminum Craft 2 Sets for each craft and thus 4 Sets are needed for 2 Crafts, The tenderer should consider the following:
1) 2 years warranty While storage.
2) Corrosion inhibition of the engine and propulsion system.
3) Warranty for one year from the date of commissioning of the vessel.
4) Technical .training of buyer's technicians at manufacturer's factory for major overhauling of the engine and system, The tenderer should supply
(B) Main Engine: all under mentioned scope of supply in one package, deal. Scope
of supply is to include all the items even if not mention in the specification so as to tender the whole system complete arid ready for installation.
a) Indirect cooling system
b) Heat exchanger and expansion tanks.
c) Fresh water pump.
d) Fresh water pump for emergency cooling.
e) Raw water pump.
f) Raw water pump for emergency cooling.
g) Flexible hoses with clips,
h) Main sea chest .valves and piping system, for simultaneous use of both main engines,
i) Sea water strainers
j) Corrosion prevention arrangement.
k) Lubricating system
l) Forced feed lubrication of engine and piston cooling by means of engine, driven lubrication oil pump.
m) Oil pan on engine.
n) Lub. oil cooler on engine ,
o) Engine mounted lub. oil duplex filter (change-over type), Pre lub. oil hand pump.
p) Lub. oil centrifuge in auxiliary circuit.
q) Necessary filters with spare elements.
r) Fuel System .
The complete system for safe working of the engines-
(aa) Engine mounted fuelduplex filter, change-over type.
(bb) Piping and valves for Fuel supply lines, Necessary filters with spare elements Speed and load control
(4) Hydraulic speed governor on engine suitable for variable speed operation
(bb) Fuel rack position device, rack positioning manual shut
intake Air System
(aa Intake air manifold on engine.
(bb) Charge air cooler on engine
E-xhaust gas manifold on engine, uncooled but insulated,.
Exhaust gas turbocharger on engine.
Water cool exhaust with water injection ring and connecting flanges for installation on aluminum hull for side exhaust. Exhaust pipes, pipes joint, sufficient. quantity of insulation material for insulation for the exhaust pipe
(1)non-reversible Marine Engine, 4 stroke, water cooled Turbocharged,
. intercooled, indirect cooling, V configuration diesel engine of continuous output power about 900 RHP MCR at 42 ℃ Ambient temperature, 90% humidity and at 25 deg C seawater temperature. The speed of the vessel at standard displacement i.e 45 tons (approx.) shall be not less than 22 knots. If NECESSARY to approve the speed, the supplier shall carry out towing tank test, Required Engine Power estimation can be checked by the supplier on the basis of the proposed hull form and General Arrangement plan. If necessary, alteration of lines might be advised
(2) Starting System
Electric Starting system consisting of:
(aa) Gear rim flywheel, _
bb Engine mounted starting motor, 24V. 2 poles.
Cc Engine mounted Dynamo for charging batteries.
Dd Wiring for starter motor and dynamo.
Ee 24V DC Lead acid batteries complete with starting cables.
(3) Cooling system
All necessary pipes, pipe fittings. Expansion (Flexible Joint) and valves for engine system (Engine cooling. Fuel, etc.) shall he supplied by the tenderer.
Monitoring and control system
All necessary Ship Wiring Control cables are supplied by the tenderer.
Safety shutdown by Solenoid
Actuated at low lub oil pressure
Output Shaft arrangement
Piping: and Valves
Mounting of main engine and gear box
The- main engines and gear boxes will be supplied with mounting feet which are suitable for mounting on the girders (seating) by the chock fasting method. The chock fasting of engines and gears will he carried out by the engine supplier as part of the commissioning of the propulsion system. Chock fast shall be supplied by tenderer in appropriate time trams before shafting alignment. Initial filling of required oils for engines and gearboxes must also be supplied by the tenderer.
For each engine, instrument panel for wheelhouse as specified and maker's standard:
aa) Engine tachometer,
bb) Shaft tachometer..
cc) lub oil pressure gauge
dd) 2X exhaust gas temperature gauge after turbocharger
ee) cooling water temperature gague.
ff) lub oil temperature gauge
gg) start-stop push botton
hh) engine speed control and clutch control
ii) Group alarm panel
Alarm panel for installation in wheel house for the following:
aa) Main engine
bb) low level alarm of fuel daily tanks
4) Engine telegraph
For wheel house, indicator lamp type for (ahead, standby, dead slow, slow, half, full indication, with call bell and failure indicator, 24V, DC system, complete with spare bulbs,
D) Stern arrangement
Complete stern arrangement with careful material and strength, selection compactible fot Aluminum hull, consisting of Hydraulic marine reverse reduction gearbox, shaft struts., Coupling 'flanges & bolts, Propeller nuts, fixed pitch propeller, cap nuts, Stuffing boxes complete with gland, water lubricated Cutlass bearing, Shaft bracket boss, etc.
1)Steering system (Electro-hydraulic power steering) complete with fall follow up. non-ibllow up system end emergency system, electro-hydraulic double acting ram type complete with relief valves, by-pass valves, base plate, cocks and fittings. Design parameters are as follow:
Design speed: 22 knots
No of rudders: 2 Nos
Effective torque on two rudders: 2x2.8 kNm
Maximum rudder angle: 85 d.eg.
Steering system must be complete with the following:
Hydraulic power pack
Simple to install:, reliable and with motor and pump located on the top. easily accessible for maintenance. 2) IP 44 electric motors,-variable volume pressure compensated piston pumps, return line filter, solenoid operated directional control valves, pressure relief vaivefadjustable}, low pressure alarm switch, lifting eyes and drain plug, (Tested for specified Sow, Pressure arid function)
(3) Synchronizing rods as appropriate per Manufacture's design
(4) Steering Control System (Wheeihouse)
Complete with follow up
aa) control level
bb) ( Non follow up joystick Steering rudder angle indication (with dimmer} cc)Station selector switch ee)Mode section switch
(ff) Control panel of hydraulic power pack
gg) One set of emergency manual hydraulic steering system including Iieim -pump, safety bypass valve, steering wneei (3G0mm) diameter of stainless steel or appropriate.
(5) Pipe arid Pipe fittings (Stainless Steel)
(aa.) Pipes . (bb) Pipes joints (straight upon fittings)
(cc) Elbows (dd) Valves (ff)fittings
(ggj Pipe clamps with fastening bolts
(hh) Sfarter panels, providing all. the necessary brakers and saiety devices and as well as the transfer of tile control from the steering compartment to the bridge and open bridge.
(6) Rudder stock. Trucking and bearings must be carefully designed based on strength ead material selection for aluminium hull.
(7) One set of standard spare parts as recommended by classification societies, for 3-5 year services.
fg) 3 sets of Instruction Manual in English.
(9) Type approval certificate from ABB or equivalent,
(10) Technical information for power supply is . aa) 4I5V, AO, 50 Hz , 3 phase
(bb) 220V. AC, 50 Hz , 2 phase (cc) . 24V) DC
(11) Original equipment manufacturer (OEM) is Kobelt (Canada) or Equivalent,
(12) For reference to estimate the length cf pipes and quantity of pipe fittings, the following lengths between each station are provided: Wheel house and steering gear compartment: 16 m.
n p,o information, pamphlets and drawings should foe incGrpora.tzd with the Weight of each unit should be mentioned in uie quotation.
(F) Engine Room Ventilation. Axial Flow Blowers
(1) Electrically driven, 415V. AC, 3 phase, marine type, necessary accessories so that each unit is complete for ready installation, supply airfoil fan for engine room with starter switch, capacity is I approximately 7500 cfm at 1.5 inches water at static pressure.
electrically driven, 220-V. AC, 2 phase or 415V, AC, 3 phase, marine type, necessary accessories so that each unit is complete for ready installation, supply airfoil fan for generator room With starter switch, capacity is approximately 706 cfm at 1 inches water at static pressure,
(G) Tools and Spares
full Sets sets of special tools
aa gineaa) engines and turbocharger.
(bb) gearbox and propeller. Cc) basic tool kits with torque-meter （chain blocks, boxxspanners, etc）
cc) Basic tool kits with torque-meter (Chain blocks, box
(a.a.) Spare filters for L.O and F.O for 5,000 Hours of operation.
(bb) Spare parts for main engines for 5,000 hours of operation,
(cc) Recommend Spare parts for main engines for 10,000 hours of operation.
(dd) One set of crankshaft bearing ring for repair.
(aa) Spare propeller (Left & Fight)
(bb) Stem tube bearings, propeller shaft bracket bearing (Left & Right),
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