Abstract
The electromagnetic flux of rotating ball bearings was measured by a gradiometer-configured inductance coil. Ball spin, and drive and slave ring frequencies are distinguishable throughout testing. One ball was tested for 22 hours, 45 minutes without reaching the failure level and the second involved restarting a ball that had already reached the failure level, but showed minimal visible damage. The first test showed increased magnetization of the ball via an increase in flux at the ball spin frequency by 14 dB. The second test shows a consistent level of flux at the spin frequency compared to the final level detected in the first test. As the surface of the ball becomes damaged from skidding, an increase in the magnetic field is hypothesized to originate from the abrased ferrous surfaces. The spinning ball allows this feature to be easily detected by a simple coil of wire.
Original language | English (US) |
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Pages (from-to) | 537-542 |
Number of pages | 6 |
Journal | Proceedings - National Conference on Noise Control Engineering |
Volume | 1 |
State | Published - Dec 1 1997 |
Event | Proceedings of the 1997 National Conference on Noise Control Engineering , NOISE-CON. Part 2 (of 2) - University Park, PA, USA Duration: Jun 15 1997 → Jun 17 1997 |
All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics