초록 ▼

The disclosure illustrates a tuned viscous torsional vibration damper having a hub member for attachment to an internal combustion engine crankshaft. An annular inertia mass is journaled within the hub member to form a working chamber which contains a viscous liquid to damp out torsional oscillation

The disclosure illustrates a tuned viscous torsional vibration damper having a hub member for attachment to an internal combustion engine crankshaft. An annular inertia mass is journaled within the hub member to form a working chamber which contains a viscous liquid to damp out torsional oscillations of the inertia member relative to the hub. The hub has a series of inwardly directed vanes that are received in a corresponding number of slots in the internal member to define pairs of variable chambers filled with viscous liquid. Inwardly directed blind bores in each variable chamber form gas springs which interconnect the hub and inertia member to provide tuning.

대표청구항 ▼

A torsional vibration damper comprising: an annular hub member adapted for connection to a shaft which is subject to torsional vibrations; an annular inertia member carried by and journaled for rotation relative to said hub member, at least one surface of the inertia member being in close spaced, fa

A torsional vibration damper comprising: an annular hub member adapted for connection to a shaft which is subject to torsional vibrations; an annular inertia member carried by and journaled for rotation relative to said hub member, at least one surface of the inertia member being in close spaced, face to face relation with at least one opposing surface of said hub member; a viscous fluid contained between said opposing surfaces so that relative movement shears the fluid to damp torsional vibrations; variable volume chamber means formed between said hub and inertia members comprising a plurality of a pair of first and second variable volume chambers whose volumes vary inversely in response to relative movement of said inertia member and said hub, said viscous liquid being contained within said variable volume chambers during operation of said damper, a pocket connected to each of said respective first and second variable volume chambers and being defined by a blind bore, each of said pockets having a gas contained therein which is pressurized by liquid from said chambers when the volume thereof is reduced, at least one of said members defining a gas reservoir radially inward from said gas pockets; first and second vent passages connecting said gas reservoir to the pockets of said first and second variable volume chambers, respectively, through the other of said members, said vent passages having restricted cross sectional flow areas; and a first gas interconnection means connecting the pockets of only said first variable volume chambers and being positioned between said pockets of said first variable volume chambers and one of said first and second vent passages; and a second gas interconnection means connecting the pockets of only said second variable volume chambers and being positioned between said pockets of said second variable volume chambers and the other of said first and second vent passages whereby the gas pockets for each series of variable volume chambers are all interconnected, whereby a tuning effect is provided for said damper.