Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6953432 | Mechanical Systems and Signal Processing | 2019 | 10 Pages |
Abstract
We employ a variant of the joint time-frequency analysis (JTFA) for identifying transient, temperature-dependent noise emitted from porous journal bearings operated at temperatures between â40â¯Â°C and 0â¯Â°C. This phenomenon, called “cold squealing”, is difficult to reproduce in laboratory environments, as it requires a suitable (and typically system-specific) resonator to occur. We systematically tested real-world bearings impregnated with various oils on a custom-designed experimental rig, fitted with a coolable sample holder and a vibration sensor, over a range of rotational speeds. By analyzing temperature-differential JTFA signal maps, we succeeded in detecting transient cold-squealing as well as ranking the bearing lubricants according to their low-temperature quiet running properties.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
S.J. Eder, D. Bianchi, I.A. NeacÅu, G. Vorlaufer,