| 摘要 |
A vibration damper (24) of a rotating shaft (10) includes a floating housing (26) attached to the shaft (10) for radial vibratory displacement as a unit therewith, a plurality of cylindrical bores (42) in the floating housing (26) parallel to the axis of rotation (16) of the shaft (10), and a plurality of smaller cylindrical impactors (46), each one of which is movably retained within a respective bore (42). Each impactor (46) comprises a metal sleeve (50) containing a smaller cylindrical tungsten rod (54) movably retained therein, with a damping medium (56) around the rod (54). When the shaft (10) experiences radial vibratory displacement, each sleeve (50) impacts the wall of the respective bore (42), causing the damping medium (56) to be squeezed from between the tungsten rod (54) and the respective sleeve (50) for vibration damping energy absorption in one mode. In addition, the tungsten rods (54) impact the respective bores (42) through the sleeves (50) and initiate local plastic deformation of the bores (42), the sleeves (50) and the rods (54) for energy absorption in another mode. <IMAGE> |
