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- Title
Condition monitoring of roller bearings using acoustic emission.
- Authors
Cornel, Daniel; Guzmán, Francisco Gutiérrez; Jacobs, Georg; Neumann, Stephan
- Abstract
Roller bearing failures in wind turbines' gearboxes lead to long downtimes and high repair costs, which could be reduced by the implementation of a predictive maintenance strategy. In this paper and within this context, an acoustic-emission-based condition monitoring system is applied to roller bearing test rigs with the aim of identifying critical operating conditions before bearing failures occurs. Furthermore, a comparison regarding detection times is carried out with traditional vibration-based condition monitoring systems, with a focus on premature bearing failures such as white etching cracks. The investigations show a sensitivity of the acoustic-emission system towards lubricating conditions. In addition, the system has shown that a damaged surface can be detected at least ~4% (8 h, regarding the time to failure) earlier than by using the vibrationbased system. Furthermore, significant deviations from the average acoustic-emission signal were detected up to ~50% (130 h) before the test stop and are possibly related to sub-surface damage initiation and might result in an earlier damage detection in the future.
- Subjects
ACOUSTIC emission; ROLLER bearing fracture; WIND turbines; GEARBOXES; MAINTENANCE costs
- Publication
Wind Energy Science, 2021, Vol 6, Issue 2, p367
- ISSN
2366-7443
- Publication type
Article
- DOI
10.5194/wes-6-367-2021