Design,Fabrication,Test,and Evaluation of Spiral Bevel Support Bearings (Tapered Roller).

摘要

The report presents the results of an analytical and experimental program to evaluate the influence of critical bearing parameters on the performance of high-speed (20,000 fpm - 1.42million DN),high-load (5500-lb thrust, 7500-lb radial) tapered-roller,spiral bevel gear support bearings for use in helicopter transmissions. The program consisted of a generalized analytical investigation and then an experimental investigation based on the information obtained in the analytical investigation. In the generalized analytical investigation, a method of analysis was developed which covered bearing kinematics,internal load distribution,oil film thickness,contact stress,and fatigue life. The experimental investigation was conducted on 53tapered roller bearings of the 6500series (3.50-in. bore) by performing rotating load testing. Also,preliminary screening tests were conducted on 13additional bearings to establish key bearing design modifications. (Author)