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The AWS-TF Series of bearings was designed expressly for wind turbine gearbox applications, achieving up to 7 times the life of standard bearings in hydrogen-charged environments. That means dramatically extended service intervals, increased efficiency and lower operating cost.
In planetary gear systems of high power density and high gear ratio, helical gears create undesirable tilting moments on the planet gears; therefore, spur gears are still preferred for planetary gears -- a special challenge with respect to noise. Specifically, the different behavior of planetary gears with sequential and symmetric gear mesh is explained in this paper.