Abstract:

In order to reveal the vibration characteristics of the steel planetary transmission system with plastic gears substituting for the steel ones, this paper establishes the dynamic and experimental models of the transmission sys- tem and performs both theoretical analyses and experimental investigation of the vibration characteristics of four transmission systems in different steel/plastic compound modes. Then, the effect of the compound mode on the vi- bration characteristics is discussed. Numerical and experimental results demonstrate that plastic gears dramatically change the vibration characteristics of planetary transmission systems, greatly reduce the dynamic mesh loads on the sun-planet and ring-planet gears, and effectively suppress the gear-meshing sideband vibration and the high-fre- quency vibration of the transmission system. Moreover, it is indicated that the compound mode affects the vibration characteristics significantly, and that a reasonable steel/plastic gear compound may greatly reduce the dynamic mesh load and further reduce the vibration as well as the noise of the transmission system.

Key words: plastic gear, planetary gear transmission, vibration characteristic, compound mode