Summary of the technology
A strong tonal noise excitation occurs when meshing conventional spur gears through the strictly regular arrangement of the teeth. This noise is referred to as gear whine. Gear whine is perceived as an unpleasant noise, which often leads to customer complaints and negatively influences the product’s quality.
In order to prevent gear whine in gear trains, an innovative approach is investigated by the research group System Reliability, Adaptive Structures, and Machine Acoustics SAM of the Technische Universität Darmstadt. The principle of strictly regular (equidistant) pitch of the teeth along the circumference of spur gears is replaced. Through an optimized variation of individual tooth positioning and tooth thicknesses, an irregular gearing is developed – the inequidistant gearing.
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