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AGMA 05FTM06:2005 Edition

AGMA 05FTM06:2005 Edition

$14.30

A Model to Predict Friction Losses of Hypoid Gears

Published By Publication Date Number of Pages
AGMA 2005 17
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Authors: Hai Xu, Ahmet Kahraman, Donald R. Houser, The Ohio State University

A model to predict friction–related mechanical efficiency losses of hypoid gear pairs is proposed, which

combines a commercial available finite element based gear contact analysis model and a friction coefficient

model with a mechanical efficiency formulation. The contact analysis model is used to provide contact

pressures and other contact parameters required by the friction coefficientmodel. The instantaneous friction

coefficient is computed by using a validated new formula that is developed based on a thermal

elastohydrodynamic lubrication (EHL)model considering non–Newtonian fluid. Computed friction coefficient

distributions are then used to calculate the friction forces and the resultant instantaneous mechanical

efficiency losses of the hypoid gear pair at a givenmesh angle. Themodel is applied to study the influence of

speed, load, surface roughness, and lubricant temperature as well as assembly errors on the mechanical

efficiency of an example face–hobbed hypoid gear pair.

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