Non-Dimensional Characterization of Gear Geometry, Mesh Loss and Windage


New relationships for involute spur gear geometry are introduced and integrated with new methods of correlating lubricant traction and windage test data. Compact math models for lubricant density and viscosity under contact pressure are proposed. A modern approach to dimensional analysis is introduced to characterize lubricant traction data and gear windage data with dimensionless terms which apply to gear systems which may have a configuration and/or size different from those tested. Finally, system considerations for optimal gearbox efficiency are proposed.
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