17109303 marine fuild power

8/14/2019 17109303 Marine Fuild Power

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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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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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!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

17109303 marine fuild power

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