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AnHolisticApproachtoMarine

ConditionMonitoring

By

BobHargreaves,TechnicalDirector

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Typicaladverse ClientCommentsonMarineConditionMonitoringtoDate

Wetriedit.Itdoesntwork!Itistooc

omplicatedfortheshipsstafftouse

effectively

How

dowekn

owthatitisw

orking

properly

?

Trainingisexpensiveanddifficult

tomaintaintrainedstaffonall

shipsatalltimes

The

shipss

taffistoo

busyt

obebothe

red

withthis

Whatarethebenefitsanyway?

Therearetoomanyextrasystemsonships

thesedaysalready

There are so many different techniques usedthese days, how can I select one?

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Holistic?

holistic definition

Pronunciation: /h

listik/Function: adj

1 : of or relating to holism

2 : relating to or concerned with wholes or with complete systems

rather than with the analysis of, treatment of, or dissection into

parts < holistic medicine attempts to treat both the mind and the

body>

holistically Pronunciation: /tik()l/

Function: adv

WHoleistic?

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HowdoesthisrelatetoConditionMonitoring?

OnOn

line

moisture

content

analysis

could

reveal

a

lubricationlinemoisturecontentanalysiscouldrevealalubrication

conditionwhichcouldultimatelyresultinamechanicalfailure.conditionwhichcouldultimatelyresultinamechanicalfailure.

ItisonlywhenmechanicaldamagebeginstoappearthataItisonlywhenmechanicaldamagebeginstoappearthata

vibrationanalysissystemwillidentifyaproblemvibrationanalysissystemwillidentifyaproblem

Example1:Gearboxbearingfailureduetohighpercentage

ofmoistureinthelubeoilExample2:Gearboxbearingfailureduetomisalignment

Conclusion1: Useoilconditionmonitoringsystem?

Cumulativebearingdamageappearsduetomechanicaldistress.Cumulativebearingdamageappearsduetomechanicaldistress.

TheearlymanifestationofthisproblemisreadilypickedupbyTheearlymanifestationofthisproblemisreadilypickedupbyvibrationanalysisbeforedamageissustainedvibrationanalysisbeforedamageissustained

OilconditionmonitoringwillgenerallyonlyidentifyaproblemOilconditionmonitoringwillgenerallyonlyidentifyaproblem

ofthisnaturewhenmetallurgicaldamagebeginstooccurofthisnaturewhenmetallurgicaldamagebeginstooccur

Conclusion2: UseVibrationanalysis?Conclusion3: Temperaturemeasurementcouldberelevant?

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Twotypesofmonitoring:

1.AuxiliaryMachinery:

Portable

Data

Collectors

generally

used

2.CriticalMachinery:

TypicallyTurbochargershavenovibration

monitoring

CriticalmachineryhastosomeCriticalmachineryhastosome

extentbeentraditionallyextentbeentraditionally

monitoredmonitored byvibrationprotectionbyvibrationprotectionsystemssystems

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AutomationsystemAlarms:AutomationsystemAlarms:

Circa

5,000

discrete

alarms

on

a

modern

large

LNG

Carrier

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HowtointegrateCMmessagesinto shipHowtointegrateCMmessagesinto shipssystem?ssystem? Thereisnopointinduplicatinginformation

IfadefinitivemessagecanbeproducedfromaCM

systemidentifyingmachineandfaultdiagnosis,thenthisshouldbepresentedinthesamemannerasanyotheralarm

Theshipsstaffshouldrequirenospecialtrainingto

usesuchasystem

Ifalarmmessagescanbepasseddirectlytotheships

automationsystem,somuchthebetter

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Logicalandstraightforwardalarminterface

HowtointegrateCMmessagesinto shipHowtointegrateCMmessagesinto shipssystem?ssystem?

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ProtectionSystem:ProtectionSystem:

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MonitoringSystem:MonitoringSystem:

TELEMETRYTheGuysinthedatacentrearemonitoringthemachine

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IntegratedSupport:

IncrementalDatacanbeautomaticallyemailedfromshipsonadailybasisandmonitoredashoreItalsopossibleforFleetTechnicalManagementtoreceivethisdatainthesameform,shoulditberequired.Timelysupportbyshorebasedspecialistscanreducemajordamage

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Support:

ExampleofSupportDatabase

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ExampleofTrendHistory

Support:

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CaseStudy:

Whatdotheseitems

haveincommon?

http://../Users/bobh.RCMMARINE/Videos/RealPlayer%20Downloads/breaking%20a%20wine%20glass%20using%20resonance.flv

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ThisfaultwasidentifiedbyVoyagerandwas

causedbyalubeoilleakcausingcarbonisation

and contactbetweentheturbinediscand

casing,causingarub

TypicalProblemidentifiedbyVoyagerSystem

CaseStudy:

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TypicalProblemidentifiedbyVoyagerSystem

CaseStudy:

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CaseStudy:

Whatdotheseitems

haveincommon?

http://../Users/bobh.RCMMARINE/Videos/RealPlayer%20Downloads/breaking%20a%20wine%20glass%20using%20resonance.flv

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Lubeoilmoisturecontentsensor

AnalogueInputs,includingTemperature,pressureandaxial

displacementsensors

On/Off

devices,

such

as

oil

mist

detectors

Engineperformancemonitors

Anyparameter

with

an

analogue

output

MoistureContentSensor

HolisticAnalogueInputs

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ToBuildtheHolisticallyidealSystem

HolisticConclusions:

Analysepossiblefailuremodesandensurecorrectsensorsand

techniquesareemployedtoidentifythesemodes

Integratethesensorsandtechniquesintoanonboardsystem

whichoperatesinthesameway,andcomplements, conventional

alarmfunctions

Includeanautomatedfacilityfortransmittingtrendanddata

analysisashoreinordertoprovideeffectiveandtimelysupport

Includeanimmediateexceptionalerttoassistinfocussingland

basedsupportstafftorespondtoacurrentproblemandtothenadvisetheshipsstaff

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ToBuildtheHolisticallyidealSystem

HolisticConclusions:

Titanic