Abstract
Nowadays, infrared imaging technologies have been developing in various industrial fields. We therefore focus on the infrared ray imagery as a novel method to estimate the gear tooth meshing. In the present report, a high response infrared thermography, which could take a middle infrared ray image of around 4 μm wavelength, was used to investigate the temperature hysteresis on the tooth contact surface of hypoid gear under running conditions. We installed the high reflective mirror of infrared ray at the opposite side of the gear tooth meshing point to obtain the tooth surface images around the entire gear, and estimated the variation of tooth surface temperature at the duration from a tooth meshing to the next tooth meshing. As a result, it is clear that the temperature on the tooth surface after meshing can be modeled by first order time delay and the maximum temperature is affected by contact pressure, relative sliding speed between tooth surfaces and average peripheral speed of tooth surface. This proposed method is effective to evaluate the temperature hysteresis on the tooth contact surface of hypoid gear.
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