| 摘要 |
PURPOSE: To prevent rotary vibration by liquid friction by providing a piston valve controlled as a function of revolutions on the pressure side of a conveying conduit having a reservoir chamber, and varying the cross section of the conveying conduits by the movement of a piston. CONSTITUTION: In a rotary vibration damper casing 1, a pump circulation system is formed by a spur gear 2 connected to the drive shaft or output shaft, and mounted on the central output shaft or drive shaft, two spur gears 3 engaged with it and conveying conduits 4 having an accumulator 13 on the pressure side. When rotary vibration occurs between the drive shaft and output shaft, high pressure is generated alternately via a super pressure valve 14 in the left and right conveying conduits 4 for vibration damping media by the pump formed by the spur gears 2, 3. The media volume variation of the accumulator 13 due to the said pressure variation and the cross section variation of the piston valve 7 formed by a piston 8 moving in correspondence with the rotation damp the rotary vibration. In this way, it is possible to damp all the rotary vibration by the connection without friction. |
