19 - david beech and howard harper

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

19 - david beech and howard harper

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