Development of Torsional Damper with Crowds of Solid Balls (Effect of Weight of Balls on Damping Performance)

摘要

The damping mechanism in the new torsional damper proposed by authors, which improves the defects of knows dampers such as rubber dampers, oil dampers, solid frictional dampers and etc., is investigated experimentally and clarified as follows. (1) The damping effect depends on the relation between the inertia torque of damper mass due to torsional vibration and the friction torque due to centrifugal inertia force of crowds of solid balls, and isn't restricted by the natural frequency of shaft system and the loading torque on shaft system. (2) Torsional vibration is damped by not only the friction loss in coupling portion but also the fluctuation of natural frequency of shaft system. The latter is caused by angular sliding and coupling phenomenon of damper mass to damper case at every period of torsional vibration. (3) When the friction torque due to centrifugal inertia force of crowds of solid balls is nearly equal to that at the changing point from coupling to sliding of damper mass to damper case, this damper is powerful for damping the torsional vibration of shaft system.