This paper presents results of an investigation to assess the potential of the acoustic emission (AE) technology for detecting seal-to-rotor rubbing in power generation turbines. The experimental program involved inducing rubs at various axial locations along a test rotor, rotating at and supported by journal bearings. Whilst there was no change in vibration levels throughout the tests, bearing mounted AE transducers successfully detected all rubbing induced on the rotor.
Detecting Shaft-to-Seal Rubbing in Power Generation Turbines With the Acoustic Emission Technology
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Leahy, M., Mba, D., Cooper, P., Montgomery, A., and Owen, D. (April 27, 2006). "Detecting Shaft-to-Seal Rubbing in Power Generation Turbines With the Acoustic Emission Technology." ASME. J. Vib. Acoust. December 2006; 128(6): 798–800. https://doi.org/10.1115/1.2346696
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