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7/29/2019 19 - David Beech and Howard Harper
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Planning for conditionmonitoring and condition based
maintenance with new builds andships in service
David Beech and Howard Harper
VCI Consultancy Ltd
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What is ConditionMonitoring?
ISO 13372 defines conditionmonitoring as :
the detection and collection of
information and data thatindicates the state of a machine
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CBM Techniques
Include the following: Watchkeeping
Oil Analysis Thermography
Acoustic emission Vibration
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New builds
Vibration technology can be appliedto:-
Machinery
Structure of the vessel
to ensure compliance to the agreedSpecifications between the Owner
and Shipyard
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Ships in Service
Following the delivery of a vessel, theutilisation of vibration technology aspart of the CBM regime should
include Critical and Classifiedmachines to maximise the savings able
to be made. The system should beinstalled by an approved competentsupplier and a baseline survey beundertaken.
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What is required by Class for asystem?
Identify CM method for the machine
usually based on the criticality ofthe machine
Establish the frequency of monitoringand limits of acceptance
Details of CM software Details of CM hardware
Method and frequency of calibration
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Specific requirements forportableVibration systems
Able to display Trends
Able to display FFT frequencyspectrum
Details of personnel training
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Types of Vibration Monitoringsystems
Permanently installed systems
Semi-permanent systems
Portable monitoring systems
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Permanently installed Systems
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Cargo and ballastpumps(complying with OCIMFrecommendations)
Alternators
Gearboxes
FD & Vent Fans
Protection system
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Variable speedmachines
Software linked
Remote diagnosis ofdata collected
Condition Monitoring Systemexample Turbochargers
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Semi-permanent systems
Transducers permanently
installed and data collectedperiodically using portable
instrumentation
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Portable Systems
- Data Collectors
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Alternative Data Collectors
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Why Vibration basedcondition monitoring?
Savings
Benefits
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Savings
Machinery breakdowns reduced Riding crews/specialist labour
reduced
Inventories reduced
Downtime reduced
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Benefits
Increased reliability Improved safety standards
Reduced environmental contamination Reduced maintenance costs
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Savings magnitude
Savings of a minimum of 20% ofannual maintenance budgets arecurrently being achieved
Machinery drydocking costs reduced
to 25% of previous costs without asystem
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Problems being facedwithin this sector
Availability of engineers
Quality
Quantity
Cost
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Engineers time Planned Maintenance Systems are
mandatory Over 80% of machines opened under
Planned Maintenance Systems arefound to be satisfactory
Why waste Engineers time opening
satisfactory machines? Why open these machines and risk afault being introduced during
refurbishment?
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Engineers time
Over 60% of machinery failuresare following refurbishment, and
attributed to the humanintervention
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Training
Specially developed Training Coursesto ISO 18436
Training both in the UK and abroad,either onboard or at Client offices
Web based training is now being
finalised
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