Apparatus for damping vibrations in stock suspension flow

Details Apparatus for damping vibrations in stock suspension flow Apparatus for damping vibrations in stock suspension flow

1986-06-19

1988-04-05

Alvo, Steve

Paper making and fiber liberation

Apparatus

Automatic control

138 26, 138 31, 162380, 181206, D21D 502, D21F 106, F16L 5504

Patent

active

047356871

ABSTRACT:
Fibrous stock suspension preparation systems include moving parts that generate a vibration impulse flow in the outlet from the preparation system. A counter-vibration impulse generator is connected to the outlet pipe and includes a correcting impulse recorder also connected to the outlet pipe for sensing the vibrations of the flow therepast and for sending a signal to the counter-vibration generator to control the amplitude and/or the frequency of the counter-vibration generator. A further impulse recorder between the stock suspension preparation system and the first mentioned impulse recorder is also connected to the outlet pipe for providing a stock transit time correction signal for correcting the signal of the first mentioned impulse recorder.

REFERENCES:
patent: 2575333 (1951-11-01), Toro
patent: 3538747 (1970-11-01), Munch
patent: 4171465 (1979-10-01), Swinbanks
patent: 4199295 (1980-04-01), Raffy et al.
patent: 4248268 (1981-02-01), Choute
patent: 4308095 (1981-12-01), Brendemuehl
patent: 4566118 (1986-01-01), Chaplin et al.
patent: 4600863 (1986-07-01), Chaplin et al.
patent: 4642035 (1987-02-01), Nyquist
Dynamic Vibration Absorbers--J. B. Hunt--pp. 98-101.
Zeitschriftenschau--A. R. Mahmoud et al.

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