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Accuracy, effectiveness and improvement of Vibration-based Maintenance in Paper Mills: Case Studies
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. (Systemekonomi)
2000 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 229, no 2, 389-410 p.Article in journal (Refereed) Published
Abstract [en]

Many current vibration-based maintenance (VBM) policies for rolling element bearings do not use as much as possible of their useful lives. Evidence and indications to prolong the bearings’ mean effective lives by using more accurate diagnosis and prognosis are confirmed when faulty bearing installation, faulty machinery design, harsh environmental condition and when a bearing is replaced as soon as its vibration level exceeds the normal. Analysis of data from roller bearings at two paper mills suggests that longer bearing lives can be safely achieved by increasing the accuracy of the vibration data. This paper relates bearing failure modes to the observed vibration spectra and their development patterns over the bearings’ lives. A systematic approach, which describes the objectives and performance of studies in two Swedish paper mills, is presented. Explanations of the mechanisms behind some frequent modes of early failure and ways to avoid them are suggested. It is shown theoretically, and partly confirmed by the analysis of (unfortunately incomplete) data from two paper mills over many years, that accurate prediction of remaining bearing life requires: (a) enough vibration measurements, (b) numerate records of operating conditions, (c) better discrimination between frequencies in the spectrum and (d) correlation of (b) and (c). This is because life prediction depends on precise knowledge of primary, harmonic and side band frequency amplitudes and their development over time. Further, the available data, which are collected from relevant plant activities, can be utilised to perform cyclic improvements in diagnosis, prognosis, experience and economy.

Place, publisher, year, edition, pages
2000. Vol. 229, no 2, 389-410 p.
Keyword [en]
Vibration spectral analysis, Damage vibration frequencies, Bearing defects
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Terotechnology
Identifiers
URN: urn:nbn:se:lnu:diva-21298DOI: 10.1006/jsvi.1999.2492OAI: oai:DiVA.org:lnu-21298DiVA: diva2:547098
Available from: 2012-08-30 Created: 2012-08-27 Last updated: 2012-08-30Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S0022460X99924926

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Al-Najjar, Basim
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf