Experimental investigation of fatigue behavior of spur gear in altered tooth-sum gearing

Abstract

This paper deals with the contact stress, power loss, and pitting of spur gear tooth in altered tooth-sum gearing for a tooth-sum of 100 teeth when altered by±4% tooth-sum. Analytical and experimental methods were performed to investigate and compare the altered tooth-sum gearing against the standard tooth-sum gearing. The experiments were performed using a power recirculating type test rig. The tooth loads for the experimental investigations were determined considering the surface durability of gears. A clear picture of the surface damage was obtained using a scanning electron microphotograph. The negative alteration in the tooth-sum performed better than the positive alteration in a tooth-sum operating between specified center distances.

Keywords

spur gear / power recirculating test rig / altered tooth-sum gearing / scanning electron microscopy (SEM)

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Higher Education Press and Springer-Verlag Berlin Heidelberg