Method and device for actively suppressing pressure...

B - Operations – Transporting – 21 – B

Patent

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B21B 37/00 (2006.01)

Patent

CA 2745800

The invention relates to a method and a device for actively suppressing pressure oscillations or pressure pulses in a hydraulic system of a cold or warm roll train or a strip treatment installation for iron, steel or aluminum materials. It is an object of the invention to provide a method and a device for actively suppressing pressure oscillations or pressure pulses in a hydraulic system of a cold or warm roll train or a strip treatment installation, by way of which method and device pressure oscillations or pulses which occur can be suppressed particularly effectively by means of a simple and inexpensive device. This object is achieved by a method, in which the following method steps are carried out: a) detection of a pressure signal by means of a pressure sensor by permanent measurement of a pressure in the hydraulic system; b) determination of an alternating component of the pressure signal; c) determination of at least one temporally changing actuating variable in real time with the aid of a regulator, taking at least one setpoint value and the alternating component into consideration; d) loading of at least one actuator with the actuating variable, the actuator changing a volume which corresponds to the actuating variable and is connected to the hydraulic system, as a result of which the pressure oscillations in the hydraulic system are suppressed.

L'invention concerne un procédé et un dispositif pour supprimer activement les fluctuations de pression ou les impulsions de pression dans un système hydraulique d'une chaîne de laminage à froid ou de laminage à chaud ou d'une installation de traitement de bande pour le fer, l'acier ou l'aluminium. L'objectif de l'invention est de fournir un procédé et un dispositif pour supprimer activement les fluctuations de pression dans un système hydraulique d'une chaîne de laminage à froid ou de laminage à chaud ou d'une installation de traitement de bande, au moyen duquel les fluctuations de pression apparues ou les impulsions de pression peuvent être effectivement supprimées au moyen d'un dispositif simple et peu coûteux. A cet effet, l'invention concerne un procédé comprenant les étapes suivantes consistant à: a) détecter un signal de pression au moyen d'un capteur de pression qui mesure en permanence la pression dans le système hydraulique; b) déterminer une partie alternative du signal de pression; c) déterminer au moins temporairement une variable modifiable dans le temps en temps réel à l'aide d'un contrôleur tout en prenant en considération au moins une valeur nominale et la partie alternative; d) soumettre au moins un activateur à la variable, l'activateur modifiant un volume qui correspond à la variable et qui relié au système hydraulique, les fluctuations de pression dans le système hydraulique étant supprimées.

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