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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.flv7/29/2019 03 - Bob Hargreaves
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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.flv7/29/2019 03 - Bob Hargreaves
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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
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