Torsional damper type flywheel device.

摘要

A torsional damper type flywheel device wherein at least one of flywheel device components, for example, a spring connecting a drive side and a drive side of the flywheel deive is asymmetric with respect to an axis of rotation of the flywheel device to form a total, original imbalance (A) with respect to the axis of rotation. The flywheel device includes a compensating imbalance (A min ) which is equal and opposite to the original imbalance (A) as a vector and is equally divided into two portions each distributed to each of the drive side and the driven side. The compensating imbalance (A min ) is formed in the drive side and the driven side before assembly of the flywheel device. When the drive side and driven side rotate relative to each other by a torsional angle theta and thus a gravity center of the asymmetrically arranged spring rotates by an angle theta /2 about the axis of rotation, a vector defined by the two portions of the compensating imbalance also rotates by the angle theta /2 about the axis of rotation. As a result, the flywheel device is maintained in balance at all torsional angles.