Determination of geometrical parameters of spur gear for increase of its durability on criteria of wear of teeth surface layer
The formulas, determining thickness of worn-out layer on teeth surface of a pinion and a wheel of spur gear in lower and upper active points of their involute profiles and in lower and upper points of one-pair contact, are obtained. The dimensionless function from offset coefficient of generating profile of a pinion and a wheel, values of which are proportional to the thickness of worn-out layer at the most worn-out areas of involute teeth surfaces, is obtained. The function minimization allows to determine offset coefficients, assuring the maximum durability of tooth gear on thickness of worn-out layer on teeth surfaces.