Abstract
This paper describes the power loss of bevel gear drives. We measured the friction loss and the churning loss of straight bevel gear and spiral bevel gear using a power circulating-type bevel gear testing machine, by the oil immersion formula, whose method is based on the oil temperature rise due to the power loss in the gear drives. It was found that the friction loss of the straight bevel gear is larger than that of the spiral bevel gear, and the gear friction loss ratio of the bevel gears decreases with the increase in the gear torque. Furthermore, we calculated the gear friction loss and the churning loss of the bevel gear drives. The calculated value agreed approximately with the experimental data.
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