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Novel Monitoring Method of Gear Meshing Using a High Response Infrared Thermography

[+] Author Affiliations
Kodai Niwa, Raphael Pihet, Toshiki Hirogaki, Eiichi Aoyama

Doshisha University, Kyotanabe-shi, Kyoto, Japan

Paper No. DETC2014-34478, pp. V008T11A047; 8 pages
doi:10.1115/DETC2014-34478
From:
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 26th Conference on Mechanical Vibration and Noise
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4641-4
  • Copyright © 2014 by ASME

abstract

The hypoid gear used in automobile differential has a complex shape, and the estimation of the contact conditions is difficult. Therefore we devised a method of analysis of the tooth contact conditions using a high reply thermography as a non-contact analysis method by analyzing the temperature distribution during meshing between the pinion and the gear. We decided to perform a high-speed photography used by thermography and defined the extraction line in a shot thermal image to extract the temperature data from the thermal images. The temperature distribution provided by extraction line shows a different temperature rising shape and the position of the tooth surface obtained using the extraction line moves up and down during the cycle of each tooth. This cyclic nature is in good accordance with the whirling of the shaft caused by the geometry error of the shaft center which was thought to have an influence on the contact conditions. In addition, as the extraction line was defined on the thermal image, it does not follow the movement of the gear, but the movement of the temperature distribution obtained using the extraction line matches the displacement of the gear by the whirling.

Copyright © 2014 by ASME
Topics: Thermography , Gears

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