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Thrusters Condition Monitoring in ... - Dynamic Positioning
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Thrusters Condition Monitoring in Azimuth Thrusters Kurt Lindborg Rolls-Royce Oy Ab October 9-10, 2007 Return to Session Directory Return to Session Directory
Transcript of Thrusters Condition Monitoring in ... - Dynamic Positioning
Thrusters
Condition Monitoring in Azimuth Thrusters
Kurt LindborgRolls-Royce Oy Ab
October 9-10, 2007
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Title - Arial 28pt
Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Author: Kurt Lindborg
2007 Dynamic Positioning ConferenceHouston, October 9-10
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
1.General2.Monitoring hardware3.Vibration analysis4.Other systems5.Conclusion
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
General
Classification societies give guidance for the monitoring and approval in their rules. In principle it is a question of Preventive Maintenance Program specified for Special Continuous Survey of Machinery.
ABSPart 7 Section 14 Guidance for Survey Based on Preventive Maintenance Techniques (2003).
DNVGuidance for Condition Monitoring , Classification notes No. 10.2 January 2003Appendix H. Condition monitoring for Propulsion and Position Thrusters
Classification
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Power train, gears and bearingsvibration measurement (spectrum)load (rpm) from motor / frequency converter
Oil quality (sample)foreign particleswater content
Propeller shaft seal, azimuth sealleakage
Stray currentICCP
What to monitor
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Monitoring hardware
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Monitoring hardware
Thruster-rpm
-direction
Slip Ring Unit
4/8 channel
4 Vibration sensors
inside thruster
Additional Information
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Measured vibration spectrum analysed with specified softwareTrendsPrognosisRecommendation for actionsLink to vessel / rig maintenance programAlert in case of an irregularity6 accelerometersPossibility to connect also temperature transmitters and other 4 – 20 mA or 0-10 Volt signalsSpectrum measurement up to 10 kHz Fmax and Envelope spectrum availableTime wave form measurementTrending parameters and alarm bands availableLoad and speed information to be supplied as 4-20 mA signal per Thruster
Vibration analysis
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Competence center
Local alert at rig
Rig PC
VPN via Internet
Communication
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Propeller shaft seal monitoring
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Azimuth seal monitoring
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Monitoring unit RR X1 extra channels used for oil condition monitoring
Examples:Control of oil quality- water content- viscosity- conductance- temperature
Optical particle counter
Water content- in lubrication hydraulicand steering hydraulicoil
Optional Condition Monitoring
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Stray current
In addition to ships ICCP system there can be own ICCP system for thruster unit. This system monitors the condition of cathodic system of the thruster giving sign of possible stray current problem.
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Endoscope pipesExample:UUC&UUS 6001,7001
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Conclusion
Condition monitoring:
targeted to monitor critical components: bearings, gear wheels, slewing ringstargeted to monitor systems: propeller shaft sel, azimuth seal, lubrication, steeringcan include whatever information from ship systems to support land based problem solving
To develop condition monitoring systems is an ongoing process.
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Rolls-Royce data – 2007 Dynamic Positioning Conference Houston , October 9-10
Thank you
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