Condition monitoring of thrust ball bearings using continuous AE

0465228 - ÚT 2017 CZ eng A - Abstract
Chlada, Milan - Nohal, L. - Převorovský, Zdeněk
Condition monitoring of thrust ball bearings using continuous AE.
NDT Welding Bulletin. Pavel Turek-Agentura Tiret. Roč. 26, č. 2 (2016), A14-A14. ISSN 1213-3825.
[Europen Conference on Acoustic Emission Testing /32./. 07.09.2016-09.09.2016, Praha]
Grant - others:NETME Centre Plus - národní program udržitelnosti(CZ) LO1202
Institutional support: RVO:61388998
Keywords : continuous acoustic emission * rolling contact fatigue * thrust ball bearing * histogram of counting periods * wavelet analysis
Subject RIV: BI - Acoustics

Fast and reliable analysis of continuous AE recorded during endurance tests on flat washer parts reliably simulating critical rolling contact fatigue of the full-scale bearings is presented in the paper. Two channels of continuous AE signal were partially recorded within whole specimen lifetime tests and compared with other experimental parameters as vibration rate or temperature. As an alternative to classical spectrogram analysis, we proposed to use histograms of time intervals between threshold amplitudes crossings in various frequency bands represented by the wavelet decomposition. Results obtained on long-time records are discussed, illustrating advantages of proposed AE signal processing, which can be done in real time to observe the processes before the onset of the final damage on the surface of the specimen more precisely than vibrodiagnostics.
Permanent Link: http://hdl.handle.net/11104/0266667