17109303 marine fuild power
TRANSCRIPT
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Marine Fluid Power
Application
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Ship Hull Machineries
Deck machineries
Steering gear
Steering thrust deviceStabilizing device
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Objective
Learning Objective:Learning Objective: Know the basic design featuresKnow the basic design featuresand functions of various marine auxiliary machineryand functions of various marine auxiliary machinery
Specific Objectives:Specific Objectives:
!ecognize the various names and locations o" au#iliar$machiner$ "ound on board
Sketch a t$pical h$draulic s$stemSketch a t$pical h$draulic s$stem
Describe the basic operation o" the machiner$ %denti"$ the main parts o" the machiner$
Sketch and label the main parts
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%ntroduction
Hull machiner$& deck machiner$ '( independent power e)uipmentdrive not related to machiner$ space and propulsion*
Steering gears
Anchor windlass+ ,inches -cargo+ topping+ vang+ mooring+ accommodation+ ladder+
boat winches. /ranes+ /aptains+ elevators+ dumbwaiters+ conve$or+ 0scalators+ bow thruster Active "ins stabilizer
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%ntroduction
Design "ollows standards machine design whichare adapted "or marine environment and shipboard re)uirement*
Design o" hull machineries re)uired cooperation
"rom marine engineer and naval architecture*
1$pes o" drive Steam' minimum "ire hazard+ rugged and simple
2ackdrop insulation 0lectric H$draulic
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Drive ' Steam
Simple + rug+ eas$ to
maintain
Minimum "ire hazard'
no sparking
Steam main
%nsulation
Automation
/ontrol reliabilit$
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Drive ' 0lectrical
D/ is pre"erred'
multiple motor speeds
!esidual power
dissipation through
rheostat
Saving "or use o" A/'re)uired power
electronics s$stem
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Open 3oop S$stem
The system takes oil from the tankand pumps it into the hydraulic motor.
A control valve is positioned in parallelwith the motor->When it is open, themotor is stationary; when it is throttledor closed the motor will operate.
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Open 3oop S$stem
The exhaust oil returns to the tankommonly used in low pressuresystem
!imple in desi"n as well as relia#le.
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Open 3oop S$stem
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/losed 3oop S$stem
The exhaust oil does not "o #ack to theoil tank- $ence closed system.
%eturned directly to the pump suction.
!uita#le for medium pressure system inmarine application.
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/losed 3oop S$stem
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/entralized H$draulic Power S$stem
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H$draulic S$stems
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/entralized H$draulic Power S$stem
/entralized h$draulic are common in largetanker '( sa"et$ limitation limit electricaland steam installation
De"icienc$ lie on s$stem cleanliness andventing work as well as compatibilit$ o""unction
Accessibilit$ "or "lushing and Avoidance o" pockets and voids that will
tend to collect "oreign material
*
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Design consideration ' H$draulic Possible arrangement o" centralized h$draulic
s$stems45* 2ower anchor windlass and "orward mooring
e)uipment on one s$stem
6* /argo+ topping + vang wing and hatch cover on
one s$stem*
7* All hull material e#cept + the steering gear on thesame s$stem
%n 8 and 5 the pumping units will be located closed tothe driven e)uipments where as in 6 the main willbe log and the pump will be located in the engineroom*
*
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Design consideration ' H$draulic
1he steering gear is le"t out in 6 because
o" small "raction o" power need and the it
availabilit$ in case o" de"ective h$draulic
h$draulic line
0nvironmental consideration 9 most hull
material are located where the$ cannot be
heated*
Fluid tank heating
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Design consideration ' H$draulic
/orrosion resistance piping : Hull
thickness allowance "or corrosion
;auge snubber '( avoid pulsating
pressure
Sump capacit$' 88
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Design re)uirement 'Mechanical
0)uipment subject to use under seawa$ Pitch o" 8< deg -bow up or bow down.
Permanent trim o" = deg b$ bow or stern
A roll o" 6< deg -each side. Permanent list o" 8= deg -either side.
'( probabilit$ o" one event at a time
'( driving and driven e)uipment on same
bedplate' otherwise deck de"lection
allowance should be assigned*
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Design re)uirement 'Mechanical
2earing that will be subject to high impact like the
wild cat o" winch '( good grade bronze
%nterior should be sand blasted+ cleaned and
gasket maintenance access is should beprovided*
>o compromise should be made on strength*
>o compromise "rom strength+ calculationadjustment is allow to compensate "rom
intermittent
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Design re)uirement 'Mechanical
!eduction gear should be totall$ enclosed and
provided with oil bath lubrication+ with means "or
"illing+ draining+ and measuring the lubricant
level in accordance with standards* At design stage+ thus allowance can be seized
on advantage derived "rom intermittent usage*
,ear load "actor that can be assigned is shown
below*
3oad capabilit$ should be given care"ul anal$sis
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Design re)uirement 90lectrical 0)uipments4
Drip roo" or watertight protection -: automatic drainage"itting.
?entilated
2earing 9( lubricated and sealed
Sound brake '( 5
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Anti "riction should be at location subject to wear+positive alignment + minimum lost motion ie+motor bearing steering gear control assembl$+worm wheel sha"t+ mooring tension sensingassembl$*
piping '"le#ibilit$ re)uire "or h$draulic s$stem airtrapping avoidance
'(watertight on deck motor and deep proo" underthe deck motor
'(Motors' sleeve and anti"riction t$pes