EVALUATION STUDY OF BALANCED LOAD PLANETARY TRANSMISSION AND DESIGN OF 250-HORSEPOWER UNIT WITH 4000-HOUR TIME BETWEEN OVERHAUL(TBO)

摘要

This report presents a complete review of the parametric design and computer studies used to evaluate the Bergen Research Compound Planetary Transmission concept in three configurations for a helicopter transmission as schematic-ally illustrated in Figure 1. The concept studies all embody design arrangements which assure uniform load division with multiple compound planetary gears. Uniform loading is accomplished by balancing the primary and secondary meshing point positions through low rate springing, 'these systems stabilize at the gear mesh positions of maximum load path equalization.