EP0674043B1 - Apparatus for treating a fibrous web - Google Patents

Apparatus for treating a fibrous web Download PDF

Info

Publication number
EP0674043B1
EP0674043B1 EP95102671A EP95102671A EP0674043B1 EP 0674043 B1 EP0674043 B1 EP 0674043B1 EP 95102671 A EP95102671 A EP 95102671A EP 95102671 A EP95102671 A EP 95102671A EP 0674043 B1 EP0674043 B1 EP 0674043B1
Authority
EP
European Patent Office
Prior art keywords
piston
web
pressing
cylinder unit
long direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95102671A
Other languages
German (de)
French (fr)
Other versions
EP0674043A1 (en
Inventor
Andreas Meschenmoser
Ulrich Wieland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0674043A1 publication Critical patent/EP0674043A1/en
Application granted granted Critical
Publication of EP0674043B1 publication Critical patent/EP0674043B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to a device for treating a fibrous web according to the preamble of claim 1.
  • the invention is used in particular for dewatering and smoothing a fibrous web.
  • EP 345 500 and EP 345 501 aimed to simplify the construction and assembly.
  • a support shoe is carried by piston rods without a rigid mechanical connection and supported horizontally by a bearing.
  • the invention has for its object to provide a device for treating a fibrous web, in which the support element is displaceable both in the pressing direction and in the web running direction and the pressure chamber of the piston-cylinder unit is arranged in the region of this support element which can be displaced in two different directions and yet on reliable sealing of the pressure chamber is always possible in a simple manner.
  • the pressing device has a plurality of piston-cylinder units. This means that the pressing device has either only one support element which is pressed on via a plurality of piston-cylinder units or a plurality of support elements which are pressed on at least one piston-cylinder unit each.
  • the belt can be lubricated hydrodynamically and / or hydrostatically via the pressure device. If there is hydrostatic lubrication, the inventive design makes it possible to use the bearing pockets or the like in the running surface of the support element facing the belt. to be supplied via a connection to the pressure chambers of the piston-cylinder units.
  • the tape may be damaged, so it is advantageous to replace the storage bags with one or more holes from the running surface of the support element and connected to the respective pressure chamber.
  • the pressing device forms a concave pressing surface and the opposite pressing surface is a rotating counter roll.
  • the support element has at least two piston-cylinder units which are arranged one behind the other in the web running direction and can be supplied with different pressures. If there are several piston-cylinder units arranged transversely to the web running direction, there is also the possibility To change the contact pressure profile transversely to the web running direction via a different pressure supply.
  • a correction of the contact pressure profile is also possible, however, if the end limit of the stop can be changed in the direction of web travel.
  • the pressure device 6 consists of at least one support element 7 which forms a concave pressure surface and has at least one piston-cylinder unit 8 which is supplied with hydraulic pressure medium and acts towards the pressure surface 3. It is entirely possible that a plurality of support elements 7 are arranged next to one another in or transversely to the web running direction 20 and / or these in turn have a plurality of piston-cylinder units 8 likewise arranged next to one another in or transversely to the web running direction 20. This offers advantages in particular in the absorption of the transverse forces acting in the web running direction 20 and the differentiated influence on the fibrous web 1 with regard to the contact pressure.
  • the support element 7 has two piston-cylinder units 8, which are arranged one behind the other in the web running direction 20 and can be supplied with different pressure via separate feed lines 19 arranged in the carrier part 21.
  • the pistons 10 of the piston-cylinder units 8 are in this case firmly connected to a carrier part 21 mounted in a frame of the drainage device.
  • the support element 7, with the two cylinders 11 attached to it, is displaceable on the piston 10 in the pressing direction and in the web running direction 20.
  • FIG. 2 shows a support element 7 with only one piston-cylinder unit 8 in the web running direction 20, although here too there may be several piston-cylinder units 8 arranged transversely to the web running direction 20 and influencing the contact pressure profile.
  • the cylinder 11 is firmly connected to the carrier part 21 here. Accordingly, the support element 7 with the piston 10 attached to it is displaceable in the pressing direction and in the web running direction 20 in the cylinder 11.
  • the sealing of the pressure chamber 17 of the respective piston-cylinder unit 8 is achieved in both cases by means of a disk 13 which runs transversely to the pressing direction, is displaceable in the web running direction 20 with respect to the piston 10 and is fixed by the latter in the pressing direction.
  • the disk 13 provided with an opening is located in a recess 15 of the piston 10, which offers a freedom of movement for the disk 13 in the web running direction 20.
  • the disk 13 has an additional sealing element 14 on the contact surface with the respective cylinder 11.
  • the pressure medium supply is secured via a feed line 19 located in the carrier part 21, which is connected to the pressure chamber 17 via a passage in the cylinder 11 or in the piston 10 .
  • the support element 7 is movable within certain limits in the web running direction 20, it can align itself according to the opposite pressing surface 3.
  • An end limit is given by a stop 12 attached to the carrier part 21.
  • this stop 12 can be designed to be variable in relation to the local position of the stop surface in the web running direction 20 without any problems, so that the contact pressure profile can be influenced by the changing position of the support element.
  • the impermeable band 4 is lubricated hydrodynamically and hydrostatically via the pressing device 6.
  • the support element 7 in the running surface directed towards the belt 4 can possibly have several storage pockets 16 transverse to the web running direction 20 and at least one in the web running direction 20.
  • These bearing pockets 16 are connected to the pressure chambers 17 of the piston-cylinder units 8, the bearing pocket 16 in the example shown in FIG. 1 being replaced by one or more openings in bores 22 with a diameter of preferably 1 to 2 mm what should prevent damage to the tape 4.
  • the pressure medium heats up on the way along the support element 7, it is advantageous to protect the often temperature-sensitive tape 4 by removing it, for example, at the end of the pressing device 6 on the web exit side according to FIG.
  • the band 4 can also be cooled by spraying on appropriately tempered pressure or lubricant.

Abstract

Device for handling a fiber web. The invention pertains to a device for the treatment of a fiber web, the device having an elongated press gap, wherein at least one press area is formed of a band which is pressure-impacted by at least one piston-cylinder unit, via a hydraulic contact pressure apparatus consisting of at least one support element, with a ready supply of fluid under pressure being assured for the bearing pockets of the support element in that one of the elements of the piston-cylinder unit is fixedly connected with a support portion, with the support element, together with the other one of the elements of the piston-cylinder unit being movably retained in the press direction and in the web moving direction on the one of the elements and wherein the support element is braced via a stop attached to the support portion.

Description

Die Erfindung betrifft eine Vorrichtung zur Behandlung einer Faserstoffbahn gemäß dem Oberbegriff des Anspruches 1. Anwendung findet die Erfindung insbesondere beim Entwässern und Glätten einer Faserstoffbahn.The invention relates to a device for treating a fibrous web according to the preamble of claim 1. The invention is used in particular for dewatering and smoothing a fibrous web.

Eine derartige Vorrichtung ist aus der WO 91/05 913 bekannt. Davon ausgehend wurde in der EP 345 500 sowie der EP 345 501 eine Vereinfachung der Konstruktion sowie der Montage ansgestrebt. Dabei wird ein Stützschuh ohne starre mechanische Verbindung von Kolbenstangen getragen und von einem Lager horizontal abgestützt.Such a device is known from WO 91/05 913. Based on this, EP 345 500 and EP 345 501 aimed to simplify the construction and assembly. A support shoe is carried by piston rods without a rigid mechanical connection and supported horizontally by a bearing.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Behandlung einer Faserstoffbahn zu schaffen, bei der das Stützelement sowohl in Preßrichtung als auch in Bahnlaufrichtung verschiebbar und der Druckraum der Kolben-Zylinder-Einheit im Bereich dieses in zwei verschiedenen Richtungen verschiebbaren Stützelements angeordnet und dennoch auf einfache Weise stets eine zuverlässige Abdichtung des Druckraumes möglich ist.The invention has for its object to provide a device for treating a fibrous web, in which the support element is displaceable both in the pressing direction and in the web running direction and the pressure chamber of the piston-cylinder unit is arranged in the region of this support element which can be displaced in two different directions and yet on reliable sealing of the pressure chamber is always possible in a simple manner.

Erfindungsgemäß wurde die Aufgabe durch die im Anspruch 1 beschriebene Vorrichtung gelöst, wobei die Unteransprüche besondere Ausführungsformen darstellen.According to the invention the object was achieved by the device described in claim 1, the subclaims representing special embodiments.

Dadurch, daß eines der beiden Elemente der Kolben-Zylinder-Einheit fest mit einem in einer Stuhlung gelagerten Trägerteil verbunden ist und das Stützelement mit dem am Stützelement befestigten anderen Element der Kolben-Zylinder-Einheit in Preßrichtung und in Bahnlaufrichtung verschiebbar auf bzw. in dem am Träger befestigten Element sitzt, wird eine einfache Zuführung des Druckfluids vom Druckraum der Kolben-Zylinder-Einheit über das daran befestigte Stützelement zu den Laufflächen desselben bei hydrostatischer Schmierung ermöglicht.Characterized in that one of the two elements of the piston-cylinder unit is fixedly connected to a support part mounted in a frame and the support element with the other element of the piston-cylinder unit attached to the support element is displaceable on or in the pressing direction and in the web running direction seated element attached to the carrier, a simple supply of the pressure fluid from the pressure chamber of the piston-cylinder unit via the attached support element to the running surfaces of the same is made possible with hydrostatic lubrication.

Das Stützelement stützt sich dabei über einen am Trägerteil befestigten Anschlag ab. Um die in Bahnlaufrichtung wirkenden Querkräfte besser aufnehmen und auf die Faserstoffbahn differenziert einwirken zu können, ist es von Vorteil, wenn die Anpreßvorrichtung mehrere Kolben-Zylinder-Einheiten besitzt. Dies bedeutet, daß die Anpreßvorrichtung entweder nur ein Stützelement, welches über mehrere Kolben-Zylinder-Einheiten angedrückt wird oder mehrere Stützelemente, welche über mindestens je eine Kolben-Zylinder-Einheit angedrückt werden, aufweist.The support element is supported by a stop attached to the carrier part. To better absorb the transverse forces acting in the web running direction and to the To be able to act in a differentiated manner on the fibrous web, it is advantageous if the pressing device has a plurality of piston-cylinder units. This means that the pressing device has either only one support element which is pressed on via a plurality of piston-cylinder units or a plurality of support elements which are pressed on at least one piston-cylinder unit each.

Da die beiden Elemente der Kolben-Zylinder-Einheit in 2 Ebenen relativ zueinander verschiebbar sind, macht sich eine besondere Form der Abdichtung des von beiden Elementen gebildeten Druckraumes erforderlich. Realisiert werden kann dies vorzugsweise über mindestens eine quer zur Preßrichtung verlaufende, in Bahnlaufrichtung in Bezug auf ein Element der Kolben-Zylinder-Einheit verschiebbare und von diesem Element in Preßrichtung fixierte, dichtende Scheibe.Since the two elements of the piston-cylinder unit can be displaced relative to one another in two planes, a special form of sealing of the pressure space formed by both elements is necessary. This can preferably be achieved by means of at least one sealing disk which runs transversely to the pressing direction, is displaceable in the web running direction with respect to an element of the piston-cylinder unit and is fixed by this element in the pressing direction.

Die Schmierung des Bandes kann dabei hydrodynamisch und/oder hydrostatisch über die Anpreßvorrichtung erfolgen. Sofern eine hydrostatische Schmierung vorliegt, so besteht durch die erfinderische Gestaltung die Möglichkeit, die in der zum Band gerichteten Lauffläche des Stützelementes vorhandenen Lagertaschen o.ä. über eine Verbindung mit den Druckräumen der Kolben-Zylinder-Einheiten zu versorgen.The belt can be lubricated hydrodynamically and / or hydrostatically via the pressure device. If there is hydrostatic lubrication, the inventive design makes it possible to use the bearing pockets or the like in the running surface of the support element facing the belt. to be supplied via a connection to the pressure chambers of the piston-cylinder units.

Sollte es durch das bei unregelmäßigen Bahnverdickungen zu beobachtende Eindrücken des Bandes in die Lagertaschen zu einer Beschädigung des Bandes kommen, so ist es von Vorteil, die Lagertaschen durch eine oder mehrere von der Lauffläche des Stützelementes ausgehende und mit dem jeweiligen Druckraum verbundene Bohrungen zu ersetzen.If the tape is damaged due to irregular web thickening, the tape may be damaged, so it is advantageous to replace the storage bags with one or more holes from the running surface of the support element and connected to the respective pressure chamber.

Bei einer bevorzugten Ausführungsform bildet die Anpreßvorrichtung eine konkave Anpreßfläche und ist die gegenüberliegende Preßfläche eine rotierende Gegenwalze.In a preferred embodiment, the pressing device forms a concave pressing surface and the opposite pressing surface is a rotating counter roll.

Zur Beeinflussung des Anpreßdruckprofiles in Bahnlaufrichtung empfiehlt es sich, daß das Stützelement zumindest zwei Kolben-Zylinder-Einheiten besitzt, die in Bahnlaufrichtung hintereinander angeordnet und mit unterschiedlichem Druck versorgbar sind. Sofern mehrere quer zur Bahnlaufrichtung angeordnete Kolben-Zylinder-Einheiten vorhanden sind, besteht die Möglichkeit, auch das Anpreßdruckprofil quer zur Bahnlaufrichtung über eine unterschiedliche Druckversorgung derselben zu verändern.In order to influence the contact pressure profile in the web running direction, it is recommended that the support element has at least two piston-cylinder units which are arranged one behind the other in the web running direction and can be supplied with different pressures. If there are several piston-cylinder units arranged transversely to the web running direction, there is also the possibility To change the contact pressure profile transversely to the web running direction via a different pressure supply.

Eine Korrektur des Anpreßdruckprofiles ist aber auch möglich, wenn der Anschlag bezüglich seiner Endbegrenzung in Bahnlaufrichtung veränderbar ist.A correction of the contact pressure profile is also possible, however, if the end limit of the stop can be changed in the direction of web travel.

Die Erfindung soll nachfolgend an zwei Ausführungsbeispielen näher erläutert werden. In der beigefügten Zeichnung zeigt;

Figur 1
einen in Bahnlaufrichtung verlaufenden Teilschnitt durch eine erfindungsgemäße Walze und
Figur 2
eine andere Ausführungsform dieser Walze.
The invention will be explained in more detail below using two exemplary embodiments. In the accompanying drawing shows;
Figure 1
a partial section in the web running direction through a roller according to the invention and
Figure 2
another embodiment of this roller.

In beiden Fällen handelt es sich um eine Vorrichtung zur Entwässerung einer Faserstoffbahn 1 mit zwei auf die Faserstoffbahn 1 den Entwässerungsdruck ausübenden, einen verlängerten Preßspalt bildenden Preßflächen 2 und 3, wobei eine Preßfläche 2 von einem in Bahnlaufrichtung 20 bewegbaren, undurchlässigen Band 4 und die andere Preßfläche 3 von einer rotierenden Gegenwalze 5 gebildet wird. Die Faserstoffbahn 1 wird zusammen mit mindestens einem zur Aufnahme des angepreßten Wassers geeigneten porösen Band 9 durch den Preßspalt geführt. Das Band 4 ist dabei über eine hydraulische Anpreßvorrichtung 6 zur gegenüberliegenden Preßfläche 3 hin andrückbar. Bei einer Glättbehandlung würde lediglich das poröse Band 9 entfallen.In both cases, it is a device for dewatering a fibrous web 1 with two pressing surfaces 2 and 3 exerting the dewatering pressure on the fibrous web 1, forming an extended nip, one pressing surface 2 of an impermeable belt 4 movable in the web running direction 20 and the other Press surface 3 is formed by a rotating counter roll 5. The fibrous web 1 is guided through the press nip together with at least one porous belt 9 suitable for receiving the pressed water. The band 4 can be pressed against the opposite pressing surface 3 by means of a hydraulic pressing device 6. In the case of a smoothing treatment, only the porous belt 9 would be omitted.

Die Anpreßvorrichtung 6 besteht aus mindestens einem Stützelement 7, das eine konkave Anpreßfläche bildet und über mindestens eine zur Preßfläche 3 hin wirkende mit hydraulischem Druckmittel versorgten Kolben-Zylinder-Einheit 8 verfügt. Es ist dabei durchaus möglich, daß in oder quer zur Bahnlaufrichtung 20 mehrere Stützelemente 7 nebeneinander angeordnet sind und/oder diese wiederum mehrere ebenfalls in oder quer zur Bahnlaufrichtung 20 nebeneinander angeordnete Kolben-Zylinder-Einheiten 8 besitzen. Vorteile bietet dies insbesondere bei der Aufnahme der in Bahnlaufrichtung 20 wirkenden Querkräfte sowie der hinsichtlich des Anpreßdruckes differenzierten Einflußnahme auf die Faserstoffbahn 1.The pressure device 6 consists of at least one support element 7 which forms a concave pressure surface and has at least one piston-cylinder unit 8 which is supplied with hydraulic pressure medium and acts towards the pressure surface 3. It is entirely possible that a plurality of support elements 7 are arranged next to one another in or transversely to the web running direction 20 and / or these in turn have a plurality of piston-cylinder units 8 likewise arranged next to one another in or transversely to the web running direction 20. This offers advantages in particular in the absorption of the transverse forces acting in the web running direction 20 and the differentiated influence on the fibrous web 1 with regard to the contact pressure.

Bei dem in Figur 1 dargestellten Ausführungsbeispiel hat das Stützelement 7 zwei Kolben-Zylinder-Einheiten 8, die in Bahnlaufrichtung 20 hintereinander angeordnet und über separate, im Trägerteil 21 angeordnete Zuleitungen 19 mit unterschiedlichem Druck versorgbar sind. Die Kolben 10 der Kolben-Zylinder-Einheiten 8 sind hierbei fest mit einem in einer Stuhlung der Entwässerungsvorrichtung gelagerten Trägerteil 21 verbunden. Das Stützelement 7 sitzt mit den beiden daran befestigten Zylindern 11 in Preßrichtung und in Bahnlaufrichtung 20 verschiebbar auf den Kolben 10.In the exemplary embodiment shown in FIG. 1, the support element 7 has two piston-cylinder units 8, which are arranged one behind the other in the web running direction 20 and can be supplied with different pressure via separate feed lines 19 arranged in the carrier part 21. The pistons 10 of the piston-cylinder units 8 are in this case firmly connected to a carrier part 21 mounted in a frame of the drainage device. The support element 7, with the two cylinders 11 attached to it, is displaceable on the piston 10 in the pressing direction and in the web running direction 20.

Im Unterschied dazu zeigt Figur 2 ein Stützelement 7 mit nur einer Kolben-Zylinder-Einheit 8 in Bahnlaufrichtung 20, wobei allerdings auch hier mehrere quer zur Bahnlaufrichtung 20 angeordnete, das Anpreßdruckprofil beeinflussende Kolben-Zylinder-Einheiten 8 vorhanden sein können. Außerdem ist hier der Zylinder 11 fest mit dem Trägerteil 21 verbunden. Dementsprechend sitzt das Stützelement 7 mit dem daran befestigten Kolben 10 in Preßrichtung und in Bahnlaufrichtung 20 verschiebbar im Zylinder 11.In contrast to this, FIG. 2 shows a support element 7 with only one piston-cylinder unit 8 in the web running direction 20, although here too there may be several piston-cylinder units 8 arranged transversely to the web running direction 20 and influencing the contact pressure profile. In addition, the cylinder 11 is firmly connected to the carrier part 21 here. Accordingly, the support element 7 with the piston 10 attached to it is displaceable in the pressing direction and in the web running direction 20 in the cylinder 11.

Die Abdichtung des Druckraumes 17 der jeweiligen Kolben-Zylinder-Einheit 8 wird in beiden Fällen über eine quer zur Preßrichtung verlaufende, in Bahnlaufrichtung 20 in Bezug auf den Kolben 10 verschiebbare und von diesem in Preßrichtung fixierte Scheibe 13 erreicht. Zu diesem Zweck befindet sich die mit einem Durchbruch versehene Scheibe 13 in einer Ausnehmung 15 des Kolbens 10, die in Bahnlaufrichtung 20 einen Bewegungsspielraum für die Scheibe 13 bietet. Außerdem besitzt die Scheibe 13 an der Berührungsfläche zum jeweiligen Zylinder 11 noch ein zusätzliches Dichtelement 14. Die Druckmittelversorgung wird über eine im Trägerteil 21 befindliche Zuleitung 19 abgesichert, die über eine Durchführung im Zylinder 11 bzw. im Kolben 10 mit dem Druckraum 17 in Verbindung steht.The sealing of the pressure chamber 17 of the respective piston-cylinder unit 8 is achieved in both cases by means of a disk 13 which runs transversely to the pressing direction, is displaceable in the web running direction 20 with respect to the piston 10 and is fixed by the latter in the pressing direction. For this purpose, the disk 13 provided with an opening is located in a recess 15 of the piston 10, which offers a freedom of movement for the disk 13 in the web running direction 20. In addition, the disk 13 has an additional sealing element 14 on the contact surface with the respective cylinder 11. The pressure medium supply is secured via a feed line 19 located in the carrier part 21, which is connected to the pressure chamber 17 via a passage in the cylinder 11 or in the piston 10 .

Dadurch, daß das Stützelement 7 in Bahnlaufrichtung 20 innerhalb bestimmter Grenzen beweglich ist, kann es sich entsprechend der gegenüberliegenden Preßfläche 3 ausrichten. Eine Endbegrenzung ist hierbei durch einen am Trägerteil 21 befestigten Anschlag 12 gegeben.Characterized in that the support element 7 is movable within certain limits in the web running direction 20, it can align itself according to the opposite pressing surface 3. An end limit is given by a stop 12 attached to the carrier part 21.

Dieser Anschlag 12 kann, wie in Figur 2 angedeutet, in Bezug auf die örtliche Lage der Anschlagfläche in Bahnlaufrichtung 20 problemlos variabel gestaltet werden, so daß das Anpreßdruckprofil durch die sich ändernde Lage des Stützelementes beeinflußt werden kann.As indicated in FIG. 2, this stop 12 can be designed to be variable in relation to the local position of the stop surface in the web running direction 20 without any problems, so that the contact pressure profile can be influenced by the changing position of the support element.

Das undurchlässige Band 4 wird über die Anpreßvorrichtung 6 hydrodynamisch und hydrostatisch geschmiert. Aus diesem Grund kann das Stützelement 7 in der zum Band 4 gerichteten Lauffläche quer zur Bahnlaufrichtung 20 unter Umständen mehrere und in Bahnlaufrichtung 20 zumindest eine Lagertasche 16 besitzen. Diese Lagertaschen 16 stehen mit den Druckräumen 17 der Kolben-Zylinder-Einheiten 8 in Verbindung, wobei in dem in Figur 1 dargestellten Beispiel die Lagertasche 16 durch ein bzw. mehrere Öffnungen von Bohrungen 22 mit einem Durchmesser von vorzugsweise 1 bis 2 mm ersetzt worden sind, was einer Beschädigung des Bandes 4 vorbeugen soll.The impermeable band 4 is lubricated hydrodynamically and hydrostatically via the pressing device 6. For this reason, the support element 7 in the running surface directed towards the belt 4 can possibly have several storage pockets 16 transverse to the web running direction 20 and at least one in the web running direction 20. These bearing pockets 16 are connected to the pressure chambers 17 of the piston-cylinder units 8, the bearing pocket 16 in the example shown in FIG. 1 being replaced by one or more openings in bores 22 with a diameter of preferably 1 to 2 mm what should prevent damage to the tape 4.

Da sich das Druckmittel auf dem Weg entlang dem Stützelement 7 erwärmt, ist zum Schutz des häufig temperaturempfindlichen Bandes 4 von Vorteil, dieses beispielsweise am bahnauslaufseitigen Ende der Anpreßvorrichtung 6 gemäß Figur 2 über einen Abstreifer 18 zu entfernen. Im weiteren Verlauf kann das Band 4 außerdem durch Aufspritzen von entsprechend temperiertem Druck- bzw. Schmiermittel gekühlt werden.Since the pressure medium heats up on the way along the support element 7, it is advantageous to protect the often temperature-sensitive tape 4 by removing it, for example, at the end of the pressing device 6 on the web exit side according to FIG. In the further course, the band 4 can also be cooled by spraying on appropriately tempered pressure or lubricant.

Claims (11)

  1. An apparatus for treating a pulp web (1), having two pressing surfaces (2, 3) exerting the treatment pressure on the pulp web (1) and forming an elongated press nip, with at least one pressing surface (2) being formed by a impermeable belt (4) movable in the long direction (20) of the web, which belt can be pressed via a hydraulic pressing device (6) towards the opposite pressing surface (3), the pressing device (6) consisting of at least one supporting element (7) which has at least one piston-cylinder unit (8) supplied with hydraulic pressure medium and acting towards the pressing surface (3), and an element (10, 11) of the piston-cylinder unit (8) being connected securely to a carrier part (21),
    characterised in that the supporting element (7) is seated, together with the other element (11, 10) of the piston-cylinder unit (8) which is attached thereto, on or in the element (10, 11) connected to the carrier part (21) so as to be displaceable in the direction of pressing and in the long direction (20) of the web, the pressure chamber (17) of the piston-cylinder unit (8) which is formed between the two elements (10, 11) is sealed off by at least one seal (13, 14) arranged between these elements (10, 11) and permitting both relative displacement of the elements (10, 11) in the direction of pressing and also their relative displacement in the long direction of the web and the supporting element (7) is supported on a stop (12) fastened to the carrier part (21).
  2. An apparatus according to Claim 1, characterised in that the pressing device (6) has a plurality of piston-cylinder units (8).
  3. An apparatus according to Claim 1 or 2,
    characterised in that the pressure chamber (17) of the piston-cylinder unit (8) is sealed off by at least one disc (13) extending transversely to the direction of pressing, displaceable in the long direction (20) of the web relative to an element (10 or 11) of the piston-cylinder unit (8) and fixed by this element (10 or 11) in the direction of pressing.
  4. An apparatus according to one of Claims 1 to 3, characterised in that the impermeable belt (4) is supported hydrodynamically via the pressing device (6).
  5. An apparatus according to one of Claims 1 to 4, characterised in that the impermeable belt (4) is supported hydrostatically via the pressing device (6).
  6. An apparatus according to Claim 5, characterised in that the supporting element (7) has bearing pockets (16) or openings of bores (22) in the running surface directed towards the belt (4).
  7. An apparatus according to Claim 6, characterised in that the bearing pockets (16) or the openings of the bores (22) communicate with the pressure chambers (17) of the piston-cylinder units (8).
  8. An apparatus according to one of claims 1 to 7, characterised in that the stop (12) can be altered with respect to its end limit in the long direction (20) of the web.
  9. An apparatus according to one of claims 1 to 8, characterised in that the pressing device (6) forms a concave pressing surface and the opposing pressing surface (3) is a rotating mating roll (5).
  10. An apparatus according to one of Claims 1 to 9, characterised in that the supporting element (7) has at least two piston-cylinder units (8) which are arranged in series in the long direction (20) of the web and can be supplied with different pressures.
  11. An apparatus according to one of claims 1 to 10, characterised in that the supporting element (7) has a plurality of piston-cylinder units (8) arranged transversely to the long direction (20) of the web which can be supplied with different pressures.
EP95102671A 1994-03-18 1995-02-24 Apparatus for treating a fibrous web Expired - Lifetime EP0674043B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4409316 1994-03-18
DE4409316A DE4409316C1 (en) 1994-03-18 1994-03-18 Long gap press assembly for fibre web

Publications (2)

Publication Number Publication Date
EP0674043A1 EP0674043A1 (en) 1995-09-27
EP0674043B1 true EP0674043B1 (en) 1997-05-07

Family

ID=6513188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102671A Expired - Lifetime EP0674043B1 (en) 1994-03-18 1995-02-24 Apparatus for treating a fibrous web

Country Status (8)

Country Link
US (1) US5676799A (en)
EP (1) EP0674043B1 (en)
JP (1) JPH0835190A (en)
AT (1) ATE152792T1 (en)
CA (1) CA2144923A1 (en)
DE (2) DE4409316C1 (en)
ES (1) ES2102897T3 (en)
FI (1) FI951268A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19622018A1 (en) * 1996-05-31 1997-12-04 Voith Sulzer Papiermasch Gmbh Shoe press
DE19631638A1 (en) * 1996-08-05 1998-02-12 Voith Sulzer Papiermasch Gmbh Press arrangement
SE510610C2 (en) * 1997-09-30 1999-06-07 Valmet Karlstad Ab Shoe press for a paper or cardboard machine, and a pressing cylinder unit for such
US6042694A (en) * 1997-09-30 2000-03-28 Valmet-Karlstad Ab Shoe press
US6159342A (en) * 1997-09-30 2000-12-12 Valmet-Karlstad Ab Shoe press
SE510553C2 (en) * 1997-09-30 1999-05-31 Valmet Karlstad Ab Shoe press for a paper or cardboard machine
SE511203C2 (en) * 1997-10-14 1999-08-23 Valmet Corp Long nip press and long nip press shoes for the same
CA2378847A1 (en) * 1999-07-09 2001-01-18 Metso Paper Karlstad Aktiebolag Shoe press device for pressing a wet fibre web, and a method for pressing a wet fibre web at high machine speeds
US7172679B2 (en) * 1999-12-10 2007-02-06 Metso Paper, Inc. Press device having an extended press nip for pressing of a travelling paperboard web, and procedure for controlling the pressure curve in the machine direction by such press nip
SE515483C2 (en) * 1999-12-10 2001-08-13 Valmet Karlstad Ab Pressing device with extended press nip and method for controlling the pressure curve in machine direction
SE516410C2 (en) * 2000-05-29 2002-01-15 Valmet Karlstad Ab Press in a machine for producing a continuous running web of cellulosic fibrous material and method for changing the pressure profile in such a press
US6517683B2 (en) * 2000-05-29 2003-02-11 Metso Paper Karlstad Ab Shoe press with movable guides to alter machine direction shoe position
AT410452B (en) * 2001-12-17 2003-05-26 Andritz Ag Maschf To control the roller nip pressure at the shoe press in a papermaking machine, the hydraulic static pressure is measured at drillings along/across the web for comparison with nominal values for continuous alignment
DE10228308A1 (en) * 2002-06-25 2004-01-22 Voith Paper Patent Gmbh Device and method for influencing a pressure profile
US20050098290A1 (en) * 2002-06-25 2005-05-12 Voith Paper Patent Gmbh System and method for influencing and/or monitoring a press pressure profile
WO2004001124A1 (en) * 2002-06-25 2003-12-31 Voith Paper Patent Gmbh Device for influencing and/or monitoring a pressed profile section
DE10259232A1 (en) * 2002-12-17 2004-07-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Device for forming an elongated gap
DE102004015997A1 (en) * 2004-04-01 2005-10-20 Voith Paper Patent Gmbh Wide-nip calender and method for satinizing a web in a nip
WO2006103400A1 (en) * 2005-03-29 2006-10-05 Armourtest Limited Improvements in or relating to protective clothing
FI128724B (en) * 2018-10-12 2020-11-13 Valmet Technologies Oy Belt roll of a fibre web machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005913A1 (en) * 1989-10-11 1991-05-02 Sulzer-Escher Wyss Gmbh Calender

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151001C2 (en) * 1981-12-23 1986-04-24 Kleinewefers Gmbh, 4150 Krefeld Hydrostatically mounted roller, in particular pressure treatment roller
DE3317457A1 (en) * 1983-05-13 1984-11-15 J.M. Voith Gmbh, 7920 Heidenheim Pressing device for material in strip form, in particular for dewatering a web of paper
DE3408119A1 (en) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg WET PRESS FOR DRAINING A FIBER TRAIN
DE3705241A1 (en) * 1986-12-24 1988-07-07 Escher Wyss Gmbh METHOD FOR MECHANICAL-THERMAL DRAINAGE OF A FIBER web
SE461171C (en) * 1988-05-25 1992-05-15 Valmet Paper Machinery Inc LONG NYP PRESSES BEFORE PAPER OR CARTON MACHINERY
SE461154B (en) * 1988-05-25 1990-01-15 Valmet Paper Machinery Inc LONG NYP PRESSES BEFORE PAPER OR CARTON MACHINERY
SE464922B (en) * 1990-05-08 1991-07-01 Valmet Paper Machinery Inc PRESS ROLL
DE4113623C1 (en) * 1991-04-26 1992-02-20 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4138788C2 (en) * 1991-11-26 1995-05-18 Escher Wyss Gmbh Device for dewatering a fibrous web

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005913A1 (en) * 1989-10-11 1991-05-02 Sulzer-Escher Wyss Gmbh Calender

Also Published As

Publication number Publication date
ATE152792T1 (en) 1997-05-15
US5676799A (en) 1997-10-14
EP0674043A1 (en) 1995-09-27
FI951268A (en) 1995-09-19
ES2102897T3 (en) 1997-08-01
DE4409316C1 (en) 1995-06-29
JPH0835190A (en) 1996-02-06
DE59500218D1 (en) 1997-06-12
FI951268A0 (en) 1995-03-17
CA2144923A1 (en) 1995-09-19

Similar Documents

Publication Publication Date Title
EP0674043B1 (en) Apparatus for treating a fibrous web
DE3022491C2 (en) Pressure treatment roller
DE3317974C2 (en)
DE3528333C2 (en)
DE3503819A1 (en) Hydraulic press shoe and its use and operation
DE3317455A1 (en) PRESSING DEVICE, IN PARTICULAR FOR DRAINING A PAPER RAIL
DE3410136A1 (en) METHOD FOR CONTROLLING THE LINE PRESSURE DISTRIBUTION IN ROLLER ARRANGEMENTS
DE3306838A1 (en) PRESS ROLLER WHICH BEND IS ADJUSTABLE
DE3708189C2 (en)
DE4401580A1 (en) Paper making press section - has reduced stiffness at edges of units forming press gap to reduce wear at edges
DE3725528A1 (en) MACHINE FOR PRESSING AND DRAINING OR FILTER
DE4435845C1 (en) Press roller esp. with flexible shell and internal press shoe
DE60011219T2 (en) PRESSURE FOR DRAINING A FIBERGLASS
EP0840860B1 (en) Roller or supporting element for a roller
EP1171719B1 (en) Hydrostatic bearing device
DE4011826C1 (en)
DE19852478B4 (en) Device for supplying flowable medium to a circulating device, in particular for a mechanical press
DE4026007A1 (en) DEFLECTION ADJUSTING ROLLER
DE2351856C3 (en)
DE19600576B4 (en) roller
DE2905543C2 (en) Roller for the pressure treatment of webs
EP0337145B1 (en) Device for hydrostatically supporting rolls of a rolling mill
DE19617801A1 (en) Sectional shoe for a shoe press for dewatering a fibrous (e.g. paper) web
WO1991005913A1 (en) Calender
WO2003046278A1 (en) Press roller

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19951010

17Q First examination report despatched

Effective date: 19960808

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970507

REF Corresponds to:

Ref document number: 152792

Country of ref document: AT

Date of ref document: 19970515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

Ref country code: CH

Ref legal event code: EP

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

REF Corresponds to:

Ref document number: 59500218

Country of ref document: DE

Date of ref document: 19970612

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2102897

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980225

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19990222

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990303

Year of fee payment: 5

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000225

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20000229

Year of fee payment: 6

EUG Se: european patent has lapsed

Ref document number: 95102671.5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050224