Torsional oscillation damper

US5090542A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventor

• Gerd Brunken · Dittelbrunn, DE

Key dates

• Filing date: Mar 7, 1991
• Grant date: Feb 25, 1992
• Expiry date: Mar 7, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F15/165
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The torsional oscillation damper intended in particular for the driving train of a motor vehicle comprises a disc part 11 which is rotatable round an axis of rotation and a housing part 17 which is equiaxially rotatable relative to the disc part 11, at least partially surrounds the disc part 11 and, together with the disc part 11, limits at least one damper chamber which is sealed from the exterior for receiving a viscous damper fluid. A displacement member 31 arranged on the disc part 11 or on the housing part 17 in each damper chamber divides the damper chamber into two displacement compartments which are connected to one another by a throttle channel 41. The disc part 11 and the housing part 17 are resiliently coupled together by a plurality of springs 23. On the side of the damper chamber located toward the axis of rotation 1 there are adjoined shearing gaps 47, 49 which are open toward the displacement compartments thereof and into which at least a proportion of the damper fluid from the damper chambers can escape during the relative rotation of disc part 11 and housing part 17. The quantity of damper fluid filling is calculated such that it is centrifuged substantially comple…