Abstract
This paper presents the results of an experimental investigation aimed at studying the effect of change of speed, helix angle and oil viscosity on the surface load-carrying capacity of a relatively new type of gearing of circular-arc tooth profile. Tests were carried out on three sets of twentyone pairs of gears of 6 DP, 91.5 mm pitch diameter with 22.3°, 33.6° and 42.25° helix angles. These gears were run in a power circulating gear test rig at speeds of 750, 1500 and 3000 rev min −1, transmitting different tooth loads from 1000 to 3200 kgf. The gears were tested with different lubricants of kinematic viscosity 200, 462 and 653 cSt at 40 °C. Experimental results show that the surface load-carrying capacity increases with a decrease in the helix angle and/or speed of rotation. The surface load-carrying capacity also increases with increasing oil viscosity.
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