Characterization of wear-out of friction bearings with an electromagnetic sensor

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part I

Article type: Research Article

Authors: Perrin, Stéphane^{a; *} | Mawatari, Shingo^b | Kayata, Ryo^a | Maki, Koichi^a | Miya, Kenzo^a

Affiliations: [a] IIU, 2-7-17-7F Ikenohata, Taito-ku, Tokyo 110-0008, Japan | [b] Japan Nuclear Fuel Limited, 4-108 Aza Okitsuki, Oaza Obuchi Rokkasho-mura, Kamikita-gun, Aomori-ken 039-3212, Japan

Correspondence: [*] Corresponding author: Stéphane Perrin, IIU, 2-7-17-7F Ikenohata, Taito-ku, Tokyo 110-0008, Japan. Tel.: +81 3 5814 5350; Fax: +81 3 3827 0682; E-mail: sperrin@iiu.co.jp

Abstract: Electromagnetic (EM) sensors, by directly measuring the impeller of a rotating machine, offer a powerful way to detect not only defects on the impeller itself but to indirectly assess the condition of the bearings too, through the measurement of the displacement of the shaft and of the impeller. In this paper, a new method that uses statistical features computed on the time domain signals of a rotating impeller measured with several EM sensors is proposed. It is shown that the proposed method allows the full characterization the wear-out (type and quantitative evaluation of the wear-out) in friction bearings. A real world application of this method is presented.

Keywords: Electromagnetic sensor, friction bearing, eddy current

DOI: 10.3233/JAE-2010-1160

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 573-579, 2010