Abstract
Acoustic emission (AE) refers to the elastic stress-waves produced during the release of strain energy and results from rub in rotors due to adhesion, contact and deformation of asperities and the ploughing action of wear particles. The available literature contains only a very few examples of the use of AE in detecting rub in rotating systems. The challenges to implementing AE monitoring in practice are described and discussed. There have been substantial advances in available off the shelf data acquisition systems and a relatively low cost set of equipment for carrying out such measurements is described. The technique is demonstrated on two laboratory scale rotors and the AE data showed clear indications of induced rub. The measurement results are very promising but the detectability of the AE due to rub in full scale machinery in general is an open question that can only be answered by full scale testing.
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Acknowledgments
The authors thank Lloyd’s Register Consulting for funding the work behind this paper and also for granting the authors permission to write and present it. Special thanks go to Prof. Ilmar Santos of Danmarks Tekniske Universitet and Said Lahriri for allowing the use of the backup bearing test rig in the testing and to Kevin Cunningham of Lloyd’s Register Consulting for assistance in the data acquisition.
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© 2015 Springer International Publishing Switzerland
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Carden, E.P., Morosi, S. (2015). Use of Acoustic Emissions for the Detection of Rub of Rotors. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_44
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DOI: https://doi.org/10.1007/978-3-319-06590-8_44
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