Original scientific paper

OPTIMIZATION OF GEARBOX EFFICIENCY

Bernd-Robert Höhn ; Gear Research Centre FZG, Technische Universität München
Klaus Michaelis ; Gear Research Centre FZG, Technische Universität München
Michael Hinterstoißer ; Gear Research Centre FZG, Technische Universität München

Abstract

Although mechanical gearboxes used as torque and speed converters have already very high efficiency it is not only a task in automotive applications to further decrease gearbox power losses but also in many industrial applications.
Different methods are discussed for power loss reduction in a gearbox. No load losses can be reduced, especially at low temperatures and part load conditions when using low viscosity oils with a high viscosity index and low oil immersion depth of the components. This in turn influences the cooling properties in the gear and bearing meshes. Bearing systems can be optimized when using more efficient systems than cross loading arrangements with high preload. Low loss gears can contribute substantially to load dependent power loss reduction in the gear mesh. Low friction oils are available for further reduction of gear and bearing mesh losses. All in all a reduction of the gearbox losses in average of 50 % is technically feasible.
The challenge is substantial power loss reduction with only minor impact on load carrying capacity, component size and weight and noise generation. Adequate compromises have to be proposed.

Keywords

gear transmission efficiency; transmission gear, design and construction characteristics; engine mechanical efficiency; automobile; wind turbine; energy savings viewpoint

Hrčak ID:

47911

URI

https://hrcak.srce.hr/47911

Publication date:

30.12.2009.

Article data in other languages: croatian

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