Determination of optimum gear ratios of a three stage bevel helical gearbox

Abstract

This paper presents a study on the determination of optimum gear ratios of a three stage bevel helical gearbox. In the study, for finding the optimum gear ratios, an optimization problem was conducted. In the optimization problem, the cross sectional area of the gearbox was chosen as the objective function. Also, the influence of input factors including the total gearbox ratio, the coefficient of the face width of the bevel and the helical gear sets, the allowable contact stress and the output torque were considered. evaluating the effect of these parameters on the optimum gear ratios, an "experiment" was designed and a computer program was constructed to perform the "experiment". From the results of the study, the effect of the input factors on the optimum gear ratios were learned and several models for determination of the optimum gear ratios were proposed.