Roll with vibration damper

Details Roll with vibration damper Roll with vibration damper

1996-06-10

1998-09-01

Cuda, Irene

Roll or roller

With antideflection means

Rotatable relative to supporting shaft

492 4, 492 16, F16C 1300

Patent

active

058003240

ABSTRACT:
A roll, as in a paper making machine press section, with vibration damping, wherein the roll includes a stationary central shaft, a rotatable annular, roll shell, a plurality of hydraulic pressure chambers each with a shoe hydraulically supported therein and pressed against the interior of the annular roll shell, wherein the roll shell is subject to vibration, which vibrates the support elements. A hydraulic pressure liquid feed channel extends through the stationary shaft and communicates with each pressure chamber. A respective throttle in the form of a channel either between the feed channel and each of the pressure chambers, or one throttle channel communicating with several of the pressure chambers or a throttle channel communicating into the feed channel from the source of pressure fluid. The cross section of flow through the throttle channel is selected according to a formula, typically wherein the product d.sup.2 .times.n.sup.-1 is between 6 mm.sup.2 and 90 mm.sup.2 where d is the cross section of a throttle channel and n is the number of pressure chambers supplied by the respective throttle.

REFERENCES:
patent: 3512475 (1970-05-01), Justus et al.
patent: 4293588 (1981-10-01), Biondetti
patent: 4514887 (1985-05-01), Rauf et al.
patent: 4858292 (1989-08-01), Buhlmann et al.
patent: 5382096 (1995-01-01), Stein et al.

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