Torsional vibration dampening device having multiple dampening f

Details Torsional vibration dampening device having multiple dampening f Torsional vibration dampening device having multiple dampening f

1994-10-06

1996-11-12

Stodola, Daniel P.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Fluid coupling

464 68, F16D 312

Patent

active

055734600

ABSTRACT:
Viscous resistance generation mechanism (71) is a device that dampens torsional vibrations using the restricted flow of a viscous fluid. The mechanism is installed in a flywheel assembly having a first flywheel and a second flywheel coupled to allow for limited relative rotary displacement. The viscous resistance generation mechanism (71) is equipped with a first choke (S1) that generates a resistive force through the passage of a viscous fluid between small chambers formed on either side of the choke (S1) in response to rotary displacement between the flywheels in a first angular displacement range. A second choke (S2) produces a resistive force in a second displacement range greater than the first displacement range, the resistive force of the second choke (S2) being larger than the resistive force produced by the first choke (S1). A transitional damper assembly (50) does not function in the first angular displacement range, but does in the second angular displacement range to lessen the effects of the transition between the resistive force the first choke (S1) and the resistive force of the second choke (S2).

REFERENCES:
patent: 4148200 (1979-04-01), Schallhorn et al.
patent: 4873887 (1989-10-01), Andra et al.
patent: 5048658 (1991-09-01), Reik
patent: 5052978 (1991-01-01), Hanke
patent: 5180044 (1993-01-01), Fukusima et al.
patent: 5269198 (1993-12-01), Fukushima
patent: 5353664 (1994-10-01), Yamamoto
patent: 5355747 (1994-10-01), Kijitani et al.
patent: 5367921 (1994-11-01), Fukushima

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