Effect of Balanced Sliding Velocity and Slide-to-Roll Ratio on Surface Wear in Symmetric Profile Modified High Contact Ratio Spur Gears

Abstract

AbstractSurface damage in gear pairs is primarily due to the influence of sliding surface wear. This paper explores the effect of sliding velocity and slide-to-roll ratio factors on surface wear in symmetric high contact ratio spur gears (contact ratio > 2) with geometric changes induced by profile corrections. In this work, the sum of profile correction factor is maintained constant at 0.2 by distributing the profile shift (x1) of the pinion from −0.3 to 0.6. The optimal value of x1 is obtained by balancing the sliding velocity and slide-to-roll ratio at the beginning and end of the contact path. Based on the generalized Archard’s wear equation, the respective sliding wear is obtained for the optimal balanced point. The simple formulation of the model allows in obtaining the required profile modification to ensure a pre-established function of minimizing surface wear. The influence of balanced sliding velocity and slide-to-roll ratio on tooth wear is studied and compared. The input for the problem is attained from the 2D elastic model using ANSYS. From this analysis, the surface wear for minimum peak-to-peak in both the face and flank regions has been obtained. The study concludes that modification of profile shift coefficients will provide the gear designers the flexibility to optimize surface wear and its respective efficiency.KeywordsProfile shift coefficientHigh contact ratioSlide-to-roll ratioSliding velocitySurface wear