Viscous torsional vibration damper or viscous torsional vibration absorber
AssigneeHasse & Wrede GmbH
InventorsMichael Steidl, Charles Perumal, Dora Terjek
Life of this patent
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Abstract
A viscous torsional vibration damper or absorber includes a hub part which can be fastened to a crankshaft of an engine, in particular of an internal combustion engine, and an inertia ring which is mounted such that it can be rotated relative to the hub part. A shear gap, which is filled with a silicone oil, is formed between the hub part and the inertia ring, in which shear gap one or more sliding bearing components are arranged for supporting the inertia ring in a slidingly guided manner, wherein the sliding bearing component(s) are composed at least in some regions of a polyphthalamide-containing plastic, with a fraction of 50 wt. % of PP A.
Claims11
A viscous torsional vibration damper or absorber, comprising:
- a hub part which is fastenable to a crankshaft of an engine;
- a vibration damper ring which is mounted rotatably relative to the hub part;
- a shear gap, which is filled with a silicone oil, formed between the hub part and the vibration damper ring;
- one or more plain bearing components arranged in the shear gap for slidingly guided mounting of the vibration damper ring, wherein
- the one or more plain bearing components are composed at least in some regions of a polyphthalamide-containing plastic, with a fraction of more than 50% by weight of PPA,
- the one more plain bearing components are configured as flange bushings, an axial bearing ring, and/or a plain bearing plug, and
- the material of the plain bearing ring made from polyphthalamide has a density of between 1.10 and 1.20 g/cm3.
A viscous torsional vibration damper or absorber, comprising:
- a hub part which is fastenable to a crankshaft of an engine;
- a vibration damper ring which is mounted rotatably relative to the hub part;
- a shear gap, which is filled with a silicone oil, formed between the hub part and the vibration damper ring;
- one or more plain bearing components arranged in the shear gap for slidingly guided mounting of the vibration damper ring, wherein
- the one or more plain bearing components are composed at least in some regions of a polyphthalamide-containing plastic, with a fraction of more than 50% by weight of PPA, and
- the material of the plain bearing component has a shrinkage in comparison with a molten state of less than 2.5%.
Dependencies are inferred from the claim text.