Study on Noise of Planetary Gear System

As a planetary gear system is very compact and efficient, it is often used in many kinds of industrial fields. But as the planetary gear system has complex mechanisms and many parts, it is suggested that noise and virbration occur easily. There are many investigations on the noise of a pair of external gears, but there are few reports about the noise of planetary gear system that has internal gear. This report presents the results of measuring sound pressure and analyzing frequency spectrum of it that the planetary gear system produces. Also for the purpose of considering the relationship between the sound pressure level and the quality of load distribution rate of planetary gear system two kinds of sun gear, that influences load distribution rate, is used.