A special four-gear rig has been used to determine gear tooth frictional losses at loads and speeds representative of engineering practice using a gas-turbine engine oil. The effect of surface finish has been investigated by comparing the frictional losses of conventionally ground teeth (with roughness average, Ra, of approximately 0.4 μm) with those of teeth which were superfinished to approximately 0.05 μm Ra. It was found that superfinishing resulted in a reduction of friction of typically 30 percent with correspondingly lower tooth surface temperatures under the same conditions of load and speed. Film generation and frictional traction in the experiments were simulated theoretically using a thin film non-Newtonian micro-elastohydrodynamic lubrication solver, and encouraging agreement between friction measurements and theoretical predictions was obtained. [S0742-4787(00)04701-9]
Effect of Surface Finish on Gear Tooth Friction
Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS and presented at the STLE/ASME Tribology Conference, Orlando, FL, October 10–13, 1999. Manuscript received by the Tribology Division January 21, 1999; revised manuscript received May 21, 1999. Paper No. 99-Trib-14. Associate Technical Editor: J. A. Williams.
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Britton , R. D., Elcoate , C. D., Alanou , M. P., Evans , H. P., and Snidle , R. W. (May 21, 1999). "Effect of Surface Finish on Gear Tooth Friction ." ASME. J. Tribol. January 2000; 122(1): 354–360. https://doi.org/10.1115/1.555367
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