Jixie chuandong (Feb 2022)
High Contact Ratio Design and Meshing Performance Comparison for Spiral Bevel Gear
Abstract
In order to improve the meshing performance of spiral bevel gears， a novel design method of large contact ratio along face width contact path is proposed. The design contact ratio， transmission error amplitude and symmetry of spiral bevel gear pair are preset， contact paths of the inner diagonal and along the face width with large contact ratio are obtained by iteratively optimizing the local synthesis parameter. With the help of tooth surface contact analysis and loaded tooth contact analysis methods， the comparisons in tooth strength and load transmission error of the two large contact ratios designs are performed. The numerical examples show that the large contact ratio of contact path along the face width increases up to13.67% and 10.05% in the bending strength of pinion and wheel， while up to 5.77% in contact strength of the gear pair， respectively， and the amplitude of the load transmission error decreases up to 31.32%， moreover it can also improves the sensitivity of the contact pattern to assemble errors.
