OPTIMUM DESIGN OF HIGH-SPEED RAILWAY LOCOMOTIVE TRACTION GEAR

摘要

On the basis of deep investigation of locomotive traction gears manufactured at home and abroad, a variety of measures are putted forward to improve the driving load-bearing capacity and working life of our country's high-speed locomotive traction gears. The measures include the following five aspects : optimally selecting the material and heat treatment process, optimally designing the tooth profile, reasonably choosing the manufacture accuracy and technique, optimally choosing the lubricant and the way of lubrication and seal, improving the dynamic feature of the gearing. In the respect of the tooth profile, a hob with optimal cutter angles is designed to make root thickness on the dangerous section as large as possible and the stress concentration as small as possible. Addendum modification coefficient is optimized to minimize the maximum flash temperature in the course of meshing. Finally, finite element analysis method is used to calculate the deformation and the stress of teeth accurately. And on this basis, optimal profile correction and axial modification have been designed with regard to the start. continuious running and high speed travel of the locomotive.