Use of high frequency analysis of acoustic emission signals to determine rolling element bearing condition

11th International Conference on Damage Assessment of Structures

物理学;材料科学

Cockerill, A.^1 ; Holford, K.M.^1 ; Bradshaw, T.^2 ; Cole, P.^2 ; Pullin, R.^1 ; Clarke, A.^1

School of Engineering, Cardiff University, CF24 3AA, United Kingdom^1

Mistras Group Limited, Over, Cambridge

CB24 5QE, United Kingdom^2

关键词: Acoustic emission sensors;    Acoustic emission signal;    Artificial defects;    Bearing failures;    High frequency analysis;    Higher loads;    Rolling Element Bearing;    Structural resonance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012074/pdf
DOI  :  10.1088/1742-6596/628/1/012074

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Acoustic Emission (AE) sensors were used to detect signals arising from a cylindrical roller bearing with artificial defects seeded onto the outer raceway. An SKF N204ECP roller bearing was placed between two double row spherical roller bearings, type SKF 22202E, and loaded between 0.29 and 1.79kN. Speed was constant at 5780rpm. High frequency analysis allowed insight into the condition of the bearings through the determination of an increase in the structural resonances of the system as the size of an artificial defect was increased. As higher loads were applied, frequencies around 100kHz were excited, indicating the release of AE possibly attributed to friction and the plastic deformation as peaks, induced through engraving of the raceway, were flattened and worn down. Sensitivity of AE to this level in bearings indicates the potential of the technique to detect the early stages of bearing failure during life tests.