A vibration cavitation sensitivity parameter based on spectral and statistical methods
•Octave band analysis and PCA used on RMS velocity to obtain key indicators.•Mahalanobis distance is used to set thresholds since data is normally distributed.•Pump health separated into no cavitation, incipient, and fully formed condition.•Method works on a range of types and sizes of centrifugal p...
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| Published in | Expert systems with applications Vol. 42; no. 1; pp. 67 - 78 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
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Amsterdam
Elsevier Ltd
01.01.2015
Elsevier |
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| Abstract | •Octave band analysis and PCA used on RMS velocity to obtain key indicators.•Mahalanobis distance is used to set thresholds since data is normally distributed.•Pump health separated into no cavitation, incipient, and fully formed condition.•Method works on a range of types and sizes of centrifugal pumps.
Cavitation is one of the main problems reducing the longevity of centrifugal pumps in industry today. If the pump operation is unable to maintain operating conditions around the best efficiency point, it can be subject to conditions that may lead to vaporisation or flashing in the pipes upstream of the pump. The implosion of these vapour bubbles in the impeller or volute causes damaging effects to the pump. A new method of vibration cavitation detection is proposed in this paper, based on adaptive octave band analysis, principal component analysis and statistical metrics. Full scale industrial pump efficiency testing data was used to determine the initial cavitation parameters for the analysis. The method was then tested using vibration measured from a number of industry pumps used in the water industry. Results were compared to knowledge known about the state of the pump, and the classification of the pump according to ISO 10816. |
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| AbstractList | Cavitation is one of the main problems reducing the longevity of centrifugal pumps in industry today. If the pump operation is unable to maintain operating conditions around the best efficiency point, it can be subject to conditions that may lead to vaporisation or flashing in the pipes upstream of the pump. The implosion of these vapour bubbles in the impeller or volute causes damaging effects to the pump. A new method of vibration cavitation detection is proposed in this paper, based on adaptive octave band analysis, principal component analysis and statistical metrics. Full scale industrial pump efficiency testing data was used to determine the initial cavitation parameters for the analysis. The method was then tested using vibration measured from a number of industry pumps used in the water industry. Results were compared to knowledge known about the state of the pump, and the classification of the pump according to ISO 10816. •Octave band analysis and PCA used on RMS velocity to obtain key indicators.•Mahalanobis distance is used to set thresholds since data is normally distributed.•Pump health separated into no cavitation, incipient, and fully formed condition.•Method works on a range of types and sizes of centrifugal pumps. Cavitation is one of the main problems reducing the longevity of centrifugal pumps in industry today. If the pump operation is unable to maintain operating conditions around the best efficiency point, it can be subject to conditions that may lead to vaporisation or flashing in the pipes upstream of the pump. The implosion of these vapour bubbles in the impeller or volute causes damaging effects to the pump. A new method of vibration cavitation detection is proposed in this paper, based on adaptive octave band analysis, principal component analysis and statistical metrics. Full scale industrial pump efficiency testing data was used to determine the initial cavitation parameters for the analysis. The method was then tested using vibration measured from a number of industry pumps used in the water industry. Results were compared to knowledge known about the state of the pump, and the classification of the pump according to ISO 10816. |
| Author | Entwistle, Rodney McKee, Kristoffer K. Mazhar, Ilyas Howard, Ian Hodkiewicz, Melinda Forbes, Gareth L. |
| Author_xml | – sequence: 1 givenname: Kristoffer K. surname: McKee fullname: McKee, Kristoffer K. email: k.mckee@curtin.edu.au organization: Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia – sequence: 2 givenname: Gareth L. surname: Forbes fullname: Forbes, Gareth L. organization: Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia – sequence: 3 givenname: Ilyas surname: Mazhar fullname: Mazhar, Ilyas organization: Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia – sequence: 4 givenname: Rodney surname: Entwistle fullname: Entwistle, Rodney organization: Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia – sequence: 5 givenname: Melinda surname: Hodkiewicz fullname: Hodkiewicz, Melinda organization: School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia – sequence: 6 givenname: Ian surname: Howard fullname: Howard, Ian organization: Department of Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia |
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| Keywords | Centrifugal pumps Octave band analysis Vibration Condition based monitoring Cavitation Principal component analysis Modeling Adaptive method Turbine wheel Bubble Efficiency Classification ISO standard Monitoring Damaging Implosion Flash evaporation Spectral method Statistical analysis Probabilistic approach Octave Durability Pipe Longevity Experimental study Operating conditions Centrifugal pump Piping |
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| Snippet | •Octave band analysis and PCA used on RMS velocity to obtain key indicators.•Mahalanobis distance is used to set thresholds since data is normally... Cavitation is one of the main problems reducing the longevity of centrifugal pumps in industry today. If the pump operation is unable to maintain operating... |
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| SubjectTerms | Acoustics Applied sciences Cavitation Centrifugal pumps Computer science; control theory; systems Condition based monitoring Data processing. List processing. Character string processing Drops and bubbles Exact sciences and technology Flashing Fluid dynamics Fundamental areas of phenomenology (including applications) Impellers Memory organisation. Data processing Nonhomogeneous flows Octave band analysis Physics Principal component analysis Pumps Software Solid mechanics Statistical methods Structural and continuum mechanics Underwater sound Vibration Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...) Volutes |
| Title | A vibration cavitation sensitivity parameter based on spectral and statistical methods |
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