EP1284319A1 - Extended nip press for dewatering a fibrous web - Google Patents

Extended nip press for dewatering a fibrous web Download PDF

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Publication number
EP1284319A1
EP1284319A1 EP02017876A EP02017876A EP1284319A1 EP 1284319 A1 EP1284319 A1 EP 1284319A1 EP 02017876 A EP02017876 A EP 02017876A EP 02017876 A EP02017876 A EP 02017876A EP 1284319 A1 EP1284319 A1 EP 1284319A1
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EP
European Patent Office
Prior art keywords
press
nip
roll
roller
long
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Granted
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EP02017876A
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German (de)
French (fr)
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EP1284319B1 (en
Inventor
Bernhard Dr. Brendel
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Andritz Kuesters GmbH
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Eduard Kuesters Maschinenfabrik GmbH and Co KG
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Publication of EP1284319A1 publication Critical patent/EP1284319A1/en
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    • 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 an extended-nip roller press for dewatering a Fibrous web according to the preamble of claim 1.
  • Such an extended-nip roller press is known, for example, from DE 35 03 240 C2 known, which has a driven counter roll, which is a fixed Carrier body is associated with a press shoe guided therein.
  • the press shoe can be pressed hydraulically onto the counter roller.
  • To the support body is an endless Roll jacket guided around.
  • the press shoe forms with the corresponding one Roll section of the counter roll an extended press nip through which the draining fibrous web, embedded between material webs together with the roller jacket is guided in the direction of web travel.
  • the press shoe indicates this Top part that has a slideway along which the roller jacket runs.
  • the Slideway is dependent on the desired pressure profile over the Press gap width selectable and gives the press shoe an effective shoe width. It has proven to be disadvantageous, however, that the roller shell on its Belt edge undergoes deformations that show the wear of the roll shell increase.
  • the object of the invention is therefore to provide an extended-nip roller press To create type, the roller shell is subject to less wear.
  • the roll shell is in the Area between the effective shoe width of the press shoe and the End section attachment directed by the support ring on an orbit that the Roller jacket deflection on the edge of the press zone to the diameter of the End walls leads.
  • An essentially kink-free transition of the roll shell from the press zone to the respective end section attachment can be ensured become.
  • the cost advantage resulting from the use of narrow material webs instead of alternatively over the entire width of the counter roll itself extending material webs remains.
  • the Support ring formed such that this is a continuous extension of the Roll shell allowed outside the press zone.
  • the roll shell is preferably supported at the edge of the press zone by means of a radial thickness of the support ring which is at least one on the press shoe side Height which corresponds to that in the press nip by that on the counter surface overlying material web (s) and the arranged fibrous web conditional Height adjoins.
  • the roller jacket is thereby supported, which to the predefined location in the press nip is adapted.
  • the support ring can moreover not only support the roller shell, but also at the same time lead by a targeted radial change in thickness of the support ring, thereby the Defined roll jacket deflection from the press nip to the end section fastening is performed. Since the roll shell is preferably made using a at least a slight excess pressure is inflated, the roller jacket puts on the support ring of the counter roller and follows its guide path in Transition area between effective shoe width and end section attachment.
  • the counter roller also has one each following its counter surface ring-shaped depression on, whereby the web edges of the with the fibrous web guided material web (s) receive a freewheel.
  • the as material web (s) preferred felts often have on their web edges Thickenings on, which come from selvedges, melted edges, etc. and thus are production-related. To avoid marks on the roller jacket The web edges therefore preferably run over a free space. A Sufficient axial extension of the free space ensures that at one Stretching or shortening of the material web during operation the web edges of the Material webs remain over the free space. In addition, the Web overhang the position control of the material web (s).
  • FIG. 1 shows an extended-nip roller press for dewatering a fibrous web, in particular a paper web that can be part of a paper manufacturing plant.
  • a left half of the extended-nip roller press is shown and explained below.
  • the right half is mirror-symmetrical to the dividing line T. trained so that the following comments on the left half for the right half apply accordingly.
  • the extended-nip roller press comprises an extended-nip press roll 1 and one driven counter roll 2, which cooperate in a press nip 3.
  • the press nip 3 is at least one material web together with the pressed fibrous web. If only one material web is provided, act it is a so-called simply felted press.
  • two material webs 4, 5 are provided between which the fibrous web 6 to be pressed is guided. One then speaks of one so-called double felted press.
  • the material webs 4, 5 exist preferably made of felt.
  • the long nip press roll 1 comprises a fixed support 7 and one around the support rotatable roller jacket 8, which is made of a flexible material, e.g. Rubber or plastic.
  • the roll shell 8 is tubular formed and with its end portions on rotatable on the carrier 7th seated end walls 9 attached to a closed long-nip press roll 1st to build.
  • a space 10 between the carrier 7 and the roll shell 8 is preferably supplied with compressed air, whereby the roller jacket 8 is inflated, to get a cylindrical shape.
  • a press shoe 11 On the carrier 7, a press shoe 11 is provided, which is made of a support bar a plurality of spaced hydraulic Supporting elements 12 are supported on the carrier 7 and in the direction of the counter roller 2 can be pressed.
  • the press shoe 11 has an effective shoe width 13 (see FIG. 2 and Fig. 3), which forms a sliding surface on which the roll shell 8 in Supported area of the press nip 3.
  • the support elements 12 are in a known manner via pressure medium lines 14 to a hydraulic pressure medium, e.g. Oil or Water, connected.
  • the press shoe 11 forms with the corresponding jacket section Counter roll 2 the extended press nip 3 through which the two webs of material 4, 5 and the fibrous web 6 to be dewatered together with the roll shell 8 are guided in a web running direction.
  • the counter roll 2 is designed here as a bending compensation roll with a fixed roll core 20 and a rotatable around the roll core 20 Roller jacket 19, the edge of the pivot bearing 21, 22 and along it Shell surface via a support bar of hydraulic support elements 18 on the roll core 20 is supported.
  • a roll neck end 15 is mounted in a bearing 16.
  • the drive (not shown) can be connected to the roller jacket 19 in a known manner attack.
  • the roll shell 19 is also preferably elastic Cover 17 provided.
  • the hydraulic support elements 18 are in a known manner connected to pressure medium lines 23.
  • the counter roller 2 has one of the effective shoe width 13 of the press shoe 11 Opposing counter surface 24 on the press nip 3 on the counter roller 2 limited.
  • the counter surface 24 is here on the upper side of the elastic covering 17th formed in engagement with the material web 5 facing it (see FIG. 2) arrives.
  • the counter roller 2 also has an edge and is spaced apart adjacent to the effective shoe width 13 of the press shoe 11 opposite counter surface 24 a radially projecting support ring 25 on which is a counter bearing for the direct support of an outer Forms roll shell section 28 on the counter roll 2.
  • the roll shell 8 receives this outer Roll shell section 28 a support.
  • the radial thickness of the support ring 25 is selected such that a continuous extension of the roll shell 8 reached between the press shoe 11 and the end section fastening on the end walls becomes. 1 is achieved in that the radial thickness of the Support ring 25 picks up the height that the roll shell 8 in the press nip 3rd occupies due to its positioning on the material webs 4, 5 and intermediate fibrous web 6.
  • the support ring 25 thus preferably has a radial thickness which corresponds to that of the material webs 4, 5 and the fibrous web 6 predetermined roll shell position in the edge area of the counter roll 2 transfers.
  • the axial extension of the support ring 25 extends to the front End of the roll shell 19 of the counter roll 2 and can also extend beyond.
  • the radial thickness of the support ring 25 is preferably only at least press shoe side in the area of one of the fibrous web and the receiving Material webs formed height on the counter roll, and falls in the rest of each towards the outside.
  • the roller shell 8 receives a guide in the direction of Attachment to the end wall 9, opposite that of the roll shell 8 in the press nip is depressed. Since preferably in the interior 10 of the roll shell There is at least slight internal pressure, the roller jacket 8 is outside of the press nip 3 pressed against the support ring 25, like that in FIGS. 2 and 3 illustrated arrows.
  • the support ring 25 is preferably made of a plastic material, especially epoxy resin or polyamide.
  • the support ring 25 is such spaced from the effective shoe width 13 of the press shoe 11 that an end-side freewheel section for the fibrous web 6 receiving Material webs 4, 5 remain on the counter roller 2.
  • the counter roller 2 in the area of the freewheel section on an annular recess 29.
  • the one on the Counter surface 24 of the counter roll 2 have material webs 4, 5 lying thereon then such a width that it has freely overhanging ends over the annular recess 29 run. Otherwise the above apply 1 corresponding to the explanations.
  • FIG. 3 differs from that in FIG. 2 illustrated embodiment in that the support ring 25 in one piece is formed with the elastic covering 17. Otherwise, the above apply 1 corresponding to the explanations.

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  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The apparatus has a shoe roll (1) with a belt (8) rotating along a stationary support (7) which supports a shoe (11), on a belt (8) whose end sections are fixed to end walls of a support. A radially protruding support ring (25) in a mating roll (2), is arranged axially at a distance from the mating face, to form an opposing bearing for the outer belt support (28), on the mating roll.

Description

Die Erfindung betrifft eine Langspalt-Walzenpresse zum Entwässern einer Faserstoffbahn nach dem Oberbegriff des Anspruchs 1.The invention relates to an extended-nip roller press for dewatering a Fibrous web according to the preamble of claim 1.

Eine derartige Langspalt-Walzenpresse ist beispielsweise aus der DE 35 03 240 C2 bekannt, die eine angetriebene Gegenwalze aufweist, der ein feststehender Tragkörper mit einem darin geführten Preßschuh zugeordnet ist. Der Preßschuh ist hydraulisch an die Gegenwalze anpreßbar. Um den Tragkörper ist ein endloser Walzenmantel herumgeführt. Der Preßschuh bildet mit dem entsprechenden Walzenabschnitt der Gegenwalze einen verlängerten Preßspalt, durch den die zu entwässernde Faserbahn, eingebettet zwischen Materialbahnen zusammen mit dem Walzenmantel in Bahnlaufrichtung geführt ist. Der Preßschuh weist dazu ein Oberteil auf, das eine Gleitbahn hat, entlang der der Walzenmantel läuft. Die Gleitbahn ist in Abhängigkeit des gewünschten Preßdruckverlaufs über die Preßspaltbreite wählbar und verleiht dem Preßschuh eine wirksame Schuhbreite. Als nachteilig erwiesen hat sich jedoch, daß der Walzenmantel an seiner Bandkante Verformungen erfährt, die den Verschleiß des Walzenmantels erhöhen. Such an extended-nip roller press is known, for example, from DE 35 03 240 C2 known, which has a driven counter roll, which is a fixed Carrier body is associated with a press shoe guided therein. The press shoe can be pressed hydraulically onto the counter roller. To the support body is an endless Roll jacket guided around. The press shoe forms with the corresponding one Roll section of the counter roll an extended press nip through which the draining fibrous web, embedded between material webs together with the roller jacket is guided in the direction of web travel. The press shoe indicates this Top part that has a slideway along which the roller jacket runs. The Slideway is dependent on the desired pressure profile over the Press gap width selectable and gives the press shoe an effective shoe width. It has proven to be disadvantageous, however, that the roller shell on its Belt edge undergoes deformations that show the wear of the roll shell increase.

Aufgabe der Erfindung ist es daher, eine Langspalt-Walzenpresse der genannten Art zu schaffen, deren Walzenmantel einem geringeren Verschleiß unterliegt.The object of the invention is therefore to provide an extended-nip roller press To create type, the roller shell is subject to less wear.

Diese Aufgabe wird durch die Merkmale des kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved by the features of the characterizing part of the claim 1 solved.

Hierdurch wird eine Langspalt-Walzenpresse geschaffen, die den Walzenmantellauf der Langspalt-Preßwalze durch direkte Abstützung eines äußeren Walzenmantelabschnitts an der Gegenwalze stabilisiert, so daß Walzenmantelverformungen vermieden werden. Der Walzenmantel wird in dem Bereich zwischen der wirksamen Schuhbreite des Preßschuhs und der Endabschnittbefestigung durch den Stützring auf eine Umlaufbahn gelenkt, die die Walzenmantelauslenkung randseitig der Preßzone auf den Durchmesser der Stirnwände führt. Ein im wesentlichen knickfreier Übergang des Walzenmantels aus der Preßzone zur jeweiligen Endabschnittbefestigung kann sichergestellt werden. Der Kostenvorteil, der sich durch den Einsatz schmaler Materialbahnen anstelle von alternativ über die gesamte Breite der Gegenwalze sich erstreckenden Materialbahnen ergibt, bleibt erhalten. Vorzugsweise ist der Stützring derart ausgebildet, daß dieser eine kontinuierliche Erstreckung des Walzenmantels außerhalb der Preßzone erlaubt.This creates an extended-nip roller press that Roll jacket run of the extended-nip press roll by direct support of one outer roll shell section stabilized on the counter roll so that Roll shell deformations can be avoided. The roll shell is in the Area between the effective shoe width of the press shoe and the End section attachment directed by the support ring on an orbit that the Roller jacket deflection on the edge of the press zone to the diameter of the End walls leads. An essentially kink-free transition of the roll shell from the press zone to the respective end section attachment can be ensured become. The cost advantage resulting from the use of narrow material webs instead of alternatively over the entire width of the counter roll itself extending material webs remains. Preferably, the Support ring formed such that this is a continuous extension of the Roll shell allowed outside the press zone.

Die Abstützung des Walzenmantels randseitig der Preßzone erfolgt vorzugsweise mittels einer radialen Dicke des Stützringes, die mindestens preßschuhseitig eine Höhe aufweist, die an die im Preßspalt durch die auf der Gegenfläche aufliegenden Materialbahn(en) und die angeordnete Faserstoffbahn bedingte Höhe anschließt. Der Walzenmantel erfährt hierdurch eine Abstützung, die an die im Preßspalt vorgegebene örtliche Lage angepaßt ist. Der Stützring kann darüberhinaus den Walzenmantel nicht nur abstützen, sondern gleichzeitig auch führen, durch eine gezielte radiale Dickenänderung des Stützringes, wodurch die Walzenmantelauslenkung vom Preßspalt zur Endabschnittbefestigung definiert ausgeführt wird. Da der Walzenmantel vorzugsweise unter Verwendung eines zumindest geringen Überdruckes aufgeblasen ist, legt sich der Walzenmantel an den Stützring der Gegenwalze an und folgt dessen Führungsweg im Übergangsbereich zwischen wirksamer Schuhbreite und Endabschnittbefestigung.The roll shell is preferably supported at the edge of the press zone by means of a radial thickness of the support ring which is at least one on the press shoe side Height which corresponds to that in the press nip by that on the counter surface overlying material web (s) and the arranged fibrous web conditional Height adjoins. The roller jacket is thereby supported, which to the predefined location in the press nip is adapted. The support ring can moreover not only support the roller shell, but also at the same time lead by a targeted radial change in thickness of the support ring, thereby the Defined roll jacket deflection from the press nip to the end section fastening is performed. Since the roll shell is preferably made using a at least a slight excess pressure is inflated, the roller jacket puts on the support ring of the counter roller and follows its guide path in Transition area between effective shoe width and end section attachment.

Die Gegenwalze weist ferner im Anschluß an ihre Gegenfläche jeweils eine ringförmige Vertiefung auf, wodurch die Bahnränder der mit der Faserstoffbahn geführten Materialbahn(en) einen Freilauf erhalten. Die als Materialbahn(en) vorzugsweise verwendeten Filze weisen an ihren Bahnrändem vielfach Verdickungen auf, die von Webkanten, Schmelzkanten usw. stammen und damit herstellungsbedingt sind. Zur Vermeidung von Abdrücken auf dem Walzenmantel laufen die Bahnränder daher vorzugsweise über einem Freiraum. Eine hinreichende axiale Erstreckung des Freiraumes stellt sicher, daß bei einer Dehnung oder Verkürzung der Materialbahn im Betrieb die Bahnränder der Materialbahnen über dem Freiraum verbleiben. Zusätzlich vereinfacht der Bahnüberstand die Lageregelung der Materialbahn(en).The counter roller also has one each following its counter surface ring-shaped depression on, whereby the web edges of the with the fibrous web guided material web (s) receive a freewheel. The as material web (s) preferred felts often have on their web edges Thickenings on, which come from selvedges, melted edges, etc. and thus are production-related. To avoid marks on the roller jacket The web edges therefore preferably run over a free space. A Sufficient axial extension of the free space ensures that at one Stretching or shortening of the material web during operation the web edges of the Material webs remain over the free space. In addition, the Web overhang the position control of the material web (s).

Weitere Ausgestaltungen der Erfindung sind den Unteransprüchen und der nachfolgenden Beschreibung zu entnehmen.Further embodiments of the invention are the dependent claims and the see the following description.

Die Erfindung wird nachstehend anhand der in den beigefügten Abbildungen dargestellten Ausführungsbeispiele näher erläutert.

  • Fig.1 zeigt schematisch im Längsschnitt eine linke Hälfte einer Gegenwalze und einer Langspalt-Preßwalze einer Langspalt-Walzenpresse gemäß einem ersten Ausführungsbeispiel,
  • Fig. 2 zeigt schematisch im Längsschnitt einen Teilbereich einer linken Hälfte einer Gegenwalze und einer Langspalt-Preßwalze einer Langspalt-Walzenpresse gemäß einem zweiten Ausführungsbeispiel,
  • Fig. 3 zeigt schematisch im Längsschnitt einen Teilbereich einer linken Hälfte einer Gegenwalze und einer Langspalt-Preßwalze einer Langspalt-Walzenpresse gemäß einem dritten Ausführungsbeispiel.
    • The invention is explained in more detail below on the basis of the exemplary embodiments illustrated in the attached figures.
  • 1 schematically shows in longitudinal section a left half of a counter roll and an extended-nip press roll of an extended-nip roller press according to a first embodiment,
  • 2 shows schematically in longitudinal section a portion of a left half of a counter roll and an extended nip press roller of an extended nip roller press according to a second embodiment,
  • Fig. 3 shows schematically in longitudinal section a portion of a left half of a counter roll and an extended-nip press roll of an extended-nip roller press according to a third embodiment.

    • Fig. 1 zeigt eine Langspalt-Walzenpresse zum Entwässern einer Faserstoffbahn, insbesondere einer Papierbahn, die Teil einer Papierherstellungsanlage sein kann. Dargestellt und nachstehend erläutert ist eine linke Hälfte der Langspalt-Walzenpresse. Die rechte Hälfte ist spiegelsymmetrisch zur Trennlinie T ausgebildet, so daß die nachstehenden Ausführungen zur linken Hälfte für die rechte Hälfte entsprechend gelten.1 shows an extended-nip roller press for dewatering a fibrous web, in particular a paper web that can be part of a paper manufacturing plant. A left half of the extended-nip roller press is shown and explained below. The right half is mirror-symmetrical to the dividing line T. trained so that the following comments on the left half for the right half apply accordingly.

    Die Langspalt-Walzenpresse umfaßt eine Langspalt-Preßwalze 1 und eine angetriebene Gegenwalze 2, die in einem Preßspalt 3 zusammenwirken. Durch den Preßspalt 3 ist mindestens eine Materialbahn zusammen mit der zu pressenden Faserstoffbahn geführt. Ist nur eine Materialbahn vorgesehen, handelt es sich um eine sogenannte einfach befilzte Presse. Vorzugsweise sind, wie in den Fig. 1 bis 3 dargestellt, zwei Materialbahnen 4, 5 vorgesehen, zwischen denen die zu pressende Faserstoffbahn 6 geführt ist. Man spricht dann von einer sogenannten doppelt befilzten Presse. Die Materialbahnen 4, 5 bestehen vorzugsweise aus Filzen.The extended-nip roller press comprises an extended-nip press roll 1 and one driven counter roll 2, which cooperate in a press nip 3. By the press nip 3 is at least one material web together with the pressed fibrous web. If only one material web is provided, act it is a so-called simply felted press. Preferably, as in 1 to 3, two material webs 4, 5 are provided between which the fibrous web 6 to be pressed is guided. One then speaks of one so-called double felted press. The material webs 4, 5 exist preferably made of felt.

    Die Langspalt-Preßwalze 1 umfaßt einen feststehenden Träger 7 und einen um den Träger drehbaren Walzenmantel 8, der aus einem flexiblen Material, z.B. Gummi oder Kunststoff, besteht. Der Walzenmantel 8 ist schlauchförmig ausgebildet und mit seinen Endabschnitten an drehbar auf dem Träger 7 sitzenden Stirnwänden 9 befestigt, um eine geschlossene Langspalt-Preßwalze 1 zu bilden. Einem Zwischenraum 10 zwischen Träger 7 und Walzenmantel 8 wird vorzugsweise Druckluft zugeführt, wodurch der Walzenmantel 8 aufgeblasen wird, um eine zylindrische Form zu erhalten.The long nip press roll 1 comprises a fixed support 7 and one around the support rotatable roller jacket 8, which is made of a flexible material, e.g. Rubber or plastic. The roll shell 8 is tubular formed and with its end portions on rotatable on the carrier 7th seated end walls 9 attached to a closed long-nip press roll 1st to build. A space 10 between the carrier 7 and the roll shell 8 is preferably supplied with compressed air, whereby the roller jacket 8 is inflated, to get a cylindrical shape.

    An dem Träger 7 ist ein Preßschuh 11 vorgesehen, der über eine Stützleiste aus einer Mehrzahl beabstandet zueinander angeordneter hydraulischer Stützelemente 12 am Träger 7 abgestützt und in Richtung auf die Gegenwalze 2 anpreßbar ist. Der Preßschuh 11 weist eine wirksame Schuhbreite 13 (vgl. Fig. 2 und Fig. 3) auf, die eine Gleitfläche bildet, auf der sich der Walzenmantel 8 im Bereich des Preßspaltes 3 abstützt. Die Stützelemente 12 sind in bekannter Weise über Druckmittelleitungen 14 an ein hydraulisches Druckmittel, z.B. Öl oder Wasser, angeschlossen.On the carrier 7, a press shoe 11 is provided, which is made of a support bar a plurality of spaced hydraulic Supporting elements 12 are supported on the carrier 7 and in the direction of the counter roller 2 can be pressed. The press shoe 11 has an effective shoe width 13 (see FIG. 2 and Fig. 3), which forms a sliding surface on which the roll shell 8 in Supported area of the press nip 3. The support elements 12 are in a known manner via pressure medium lines 14 to a hydraulic pressure medium, e.g. Oil or Water, connected.

    Der Preßschuh 11 bildet mit dem entsprechenden Mantelabschnitt der Gegenwalze 2 den verlängerten Preßspalt 3, durch den die zwei Materialbahnen 4, 5 und die zu entwässernde Faserstoffbahn 6 zusammen mit dem Walzenmantel 8 in einer Bahnlaufrichtung geführt sind.The press shoe 11 forms with the corresponding jacket section Counter roll 2 the extended press nip 3 through which the two webs of material 4, 5 and the fibrous web 6 to be dewatered together with the roll shell 8 are guided in a web running direction.

    Die Gegenwalze 2 ist hier als Biegeausgleichswalze ausgebildet mit einem feststehenden Walzenkern 20 und einem um den Walzenkern 20 drehbaren Walzenmantel 19, der randseitig über Drehlager 21, 22 und längs seiner Mantelfläche über eine Stützleiste hydraulischer Stützelemente 18 am Walzenkern 20 abgestützt ist. Ein Walzenzapfenende 15 ist in einem Lager 16 gelagert. Ein nicht dargestellter Antrieb kann in bekannter Weise am Walzenmantel 19 angreifen. Der Walzenmantel 19 ist ferner vorzugsweise mit einem elastischen Belag 17 versehen. Die hydraulischen Stützelemente 18 sind in bekannter Weise an Druckmittelleitungen 23 angeschlossen.The counter roll 2 is designed here as a bending compensation roll with a fixed roll core 20 and a rotatable around the roll core 20 Roller jacket 19, the edge of the pivot bearing 21, 22 and along it Shell surface via a support bar of hydraulic support elements 18 on the roll core 20 is supported. A roll neck end 15 is mounted in a bearing 16. On The drive (not shown) can be connected to the roller jacket 19 in a known manner attack. The roll shell 19 is also preferably elastic Cover 17 provided. The hydraulic support elements 18 are in a known manner connected to pressure medium lines 23.

    Die Gegenwalze 2 weist eine der wirksamen Schuhbreite 13 des Preßschuhs 11 gegenüberliegende Gegenfläche 24 auf, die den Preßspalt 3 an der Gegenwalze 2 begrenzt. Die Gegenfläche 24 ist hier an der Oberseite des elastischen Belags 17 ausgebildet, die in Eingriff mit der ihr zugewandten Materialbahn 5 (vgl. Fig. 2) gelangt. Die Gegenwalze 2 weist ferner jeweils randseitig und mit Abstand benachbart der der wirksamen Schuhbreite 13 des Preßschuhs 11 gegenüberliegenden Gegenfläche 24 einen radial vorspringenden Stützring 25 auf, der ein Gegenlager zur direkten Abstützung eines äußeren Walzenmantelabschnitts 28 an der Gegenwalze 2 bildet.The counter roller 2 has one of the effective shoe width 13 of the press shoe 11 Opposing counter surface 24 on the press nip 3 on the counter roller 2 limited. The counter surface 24 is here on the upper side of the elastic covering 17th formed in engagement with the material web 5 facing it (see FIG. 2) arrives. The counter roller 2 also has an edge and is spaced apart adjacent to the effective shoe width 13 of the press shoe 11 opposite counter surface 24 a radially projecting support ring 25 on which is a counter bearing for the direct support of an outer Forms roll shell section 28 on the counter roll 2.

    In dem Übergangsbereich zwischen wirksamer Schuhbreite 13 und Befestigung an der Stirnwand 9 erhält der Walzenmantel 8 an diesem äußeren Walzenmantelabschnitt 28 eine Abstützung. Die radiale Dicke des Stützringes 25 ist derart gewählt, daß eine kontinuierliche Erstreckung des Walzenmantels 8 zwischen Preßschuh 11 und Endabschnittbefestigung an den Stirnwänden erreicht wird. Dies wird gemäß Fig. 1 dadurch erreicht, daß die radiale Dicke des Stützringes 25 die Höhe aufgreift, die der Walzenmantel 8 im Preßspalt 3 einnimmt aufgrund seiner Positionierung auf den Materialbahnen 4, 5 und der zwischenliegenden Faserstoffbahn 6. Der Stützring 25 besitzt also vorzugsweise eine radiale Dicke, die die von den Materialbahnen 4, 5 und der Faserstoffbahn 6 vorgegebene Walzenmantellage in den randseitigen Bereich der Gegenwalze 2 überträgt. Die axiale Erstreckung des Stützringes 25 reicht bis zum stirnseitigen Ende des Walzenmantels 19 der Gegenwalze 2 und kann sich auch darüberhinaus erstrecken.In the transition area between effective shoe width 13 and attachment on the end wall 9, the roll shell 8 receives this outer Roll shell section 28 a support. The radial thickness of the support ring 25 is selected such that a continuous extension of the roll shell 8 reached between the press shoe 11 and the end section fastening on the end walls becomes. 1 is achieved in that the radial thickness of the Support ring 25 picks up the height that the roll shell 8 in the press nip 3rd occupies due to its positioning on the material webs 4, 5 and intermediate fibrous web 6. The support ring 25 thus preferably has a radial thickness which corresponds to that of the material webs 4, 5 and the fibrous web 6 predetermined roll shell position in the edge area of the counter roll 2 transfers. The axial extension of the support ring 25 extends to the front End of the roll shell 19 of the counter roll 2 and can also extend beyond.

    Die radiale Dicke des Stützringes 25 liegt vorzugsweise nur mindestens preßschuhseitig im Bereich einer von der Faserstoffbahn und den aufnehmenden Materialbahnen gebildeten Höhe an der Gegenwalze, und fällt im übrigen jeweils nach außen hin ab. Der Walzenmantel 8 erhält eine Führung in Richtung der Befestigung an der Stirnwand 9, gegenüber der der Walzenmantel 8 im Preßspalt eingedrückt ist. Da in dem Innenraum 10 des Walzenmantels vorzugsweise ein zumindest geringfügiger Innendruck herrscht, wird der Walzenmantel 8 außerhalb des Preßspaltes 3 gegen den Stützring 25 gedrückt, wie die in Fig. 2 und 3 dargestellten Pfeile verdeutlichen.The radial thickness of the support ring 25 is preferably only at least press shoe side in the area of one of the fibrous web and the receiving Material webs formed height on the counter roll, and falls in the rest of each towards the outside. The roller shell 8 receives a guide in the direction of Attachment to the end wall 9, opposite that of the roll shell 8 in the press nip is depressed. Since preferably in the interior 10 of the roll shell There is at least slight internal pressure, the roller jacket 8 is outside of the press nip 3 pressed against the support ring 25, like that in FIGS. 2 and 3 illustrated arrows.

    Der Stützring 25 besteht vorzugsweise aus einem Kunststoffmaterial, insbesondere Epoxidharz oder Polyamid.The support ring 25 is preferably made of a plastic material, especially epoxy resin or polyamide.

    Gemäß dem in Fig. 2 dargestellten Ausführungsbeispiel ist der Stützring 25 derart beabstandet zur wirksamen Schuhbreite 13 des Preßschuhs 11 angeordnet, daß ein endseitiger Freilaufabschnitt für die die Faserstoffbahn 6 aufnehmenden Materialbahnen 4, 5 an der Gegenwalze 2 verbleibt. Hierzu weist die Gegenwalze 2 im Bereich des Freilaufabschnitts eine ringförmige Vertiefung 29 auf. Die auf der Gegenfläche 24 der Gegenwalze 2 aufliegenden Materialbahnen 4, 5 besitzen dann eine solche Breite, daß sie mit frei überhängende Enden über der ringförmigen Vertiefung 29 laufen. Im übrigen gelten die vorstehenden Ausführungen zu Fig. 1 entsprechend.According to the embodiment shown in Fig. 2, the support ring 25 is such spaced from the effective shoe width 13 of the press shoe 11 that an end-side freewheel section for the fibrous web 6 receiving Material webs 4, 5 remain on the counter roller 2. For this purpose, the counter roller 2 in the area of the freewheel section on an annular recess 29. The one on the Counter surface 24 of the counter roll 2 have material webs 4, 5 lying thereon then such a width that it has freely overhanging ends over the annular recess 29 run. Otherwise the above apply 1 corresponding to the explanations.

    Das in Fig. 3 dargestellte Ausführungsbeispiel unterscheidet sich von dem in Fig. 2 dargestellten Ausführungsbeispiel dadurch, daß der Stützring 25 einstückig ausgebildet ist mit dem elastischen Belag 17. Im übrigen gelten die vorstehenden Ausführungen zu Fig. 1 entsprechend.The embodiment shown in FIG. 3 differs from that in FIG. 2 illustrated embodiment in that the support ring 25 in one piece is formed with the elastic covering 17. Otherwise, the above apply 1 corresponding to the explanations.

    Claims (9)

    Langspalt-Walzenpresse zum Entwässern einer mit mindestens einer Materialbahn geführten Faserstoffbahn in einem Preßspalt, der einerseits von einer rotierenden Gegenwalze und andererseits von einer Langspalt-Preßwalze gebildet ist, und die Langspalt-Preßwalze einen feststehenden Träger und einen um den Träger drehbaren, flexiblen Walzenmantel aufweist, der im Bereich des Preßspaltes auf einem am Träger geführten, eine wirksame Schuhbreite aufweisenden Preßschuh abgestützt ist und der Walzenmantel Endabschnitte aufweist, die dichtend befestigt sind an am Träger drehbar gelagerten Stirnwänden, dadurch gekennzeichnet, daß die Gegenwalze (2) jeweils randseitig und mit Abstand benachbart einer der wirksamen Schuhbreite (13) des Preßschuhs (11) gegenüberliegenden Gegenfläche (24) einen radial vorspringenden Stützring (25) aufweist, der ein Gegenlager zur direkten Abstützung eines äußeren Walzenmantelabschnitts (28) an der Gegenwalze (2) bildet.Long-nip roll press for dewatering a fibrous web guided with at least one material web in a press nip, which is formed on the one hand by a rotating counter roll and on the other hand by a long-nip press roll, and the long-nip press roll has a fixed support and a flexible roll jacket which can be rotated about the support , which is supported in the area of the press nip on a press shoe which is guided on the carrier and has an effective shoe width, and the roller shell has end sections which are sealingly fastened to end walls rotatably mounted on the carrier, characterized in that the counter-roller (2) is in each case at the edge and at a distance adjacent to a counter surface (24) opposite the effective shoe width (13) of the press shoe (11) has a radially projecting support ring (25) which forms a counter bearing for the direct support of an outer roller jacket section (28) on the counter roller (2). Langspalt-Walzenpresse nach Anspruch 1, dadurch gekennzeichnet, daß der Stützring (25) jeweils eine radiale Dicke aufweist, die eine kontinuierliche Erstreckung des Walzenmantels (8) im Bereich zwischen Preßschuh (11) und Endabschnittbefestigung erlaubt.Long-nip roll press according to claim 1, characterized in that the support ring (25) each has a radial thickness which allows the roll shell (8) to be continuously extended in the region between the press shoe (11) and the end section fastening. Langspalt-Walzenpresse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Stützring (25) jeweils eine radiale Dicke aufweist, die mindestens preßschuhseitig im Bereich einer von der Faserstoffbahn (6) und der oder den Materialbahnen (4, 5) gebildeten Höhe auf der Gegenwalze (2) liegt. Long-nip roller press according to claim 1 or 2, characterized in that the support ring (25) each has a radial thickness which is at least on the press shoe side in the region of a height formed by the fibrous web (6) and the material web (4, 5) Counter roll (2) is. Langspalt-Walzenpresse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Stützring (25) eine radiale Dicke aufweist, die jeweils vom Preßschuh (11) aus nach außen hin abfällt.Long-nip roller press according to one of Claims 1 to 3, characterized in that the support ring (25) has a radial thickness which in each case slopes outwards from the press shoe (11). Langspalt-Walzenpresse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Stützring (25) jeweils derart beabstandet zur wirksamen Schuhbreite (13) des Preßschuhs (11) angeordnet ist, daß ein endseitiger Freilaufabschnitt für die mindestens eine Materialbahn (4, 5) verbleibt.Long-nip roller press according to one of claims 1 to 4, characterized in that the support ring (25) is in each case spaced from the effective shoe width (13) of the press shoe (11) in such a way that an end-side freewheel section for the at least one material web (4, 5 ) remains. Langspalt-Walzenpresse nach Anspruch 5, dadurch gekennzeichnet, daß die Gegenwalze (2) im Bereich des Freilaufabschnitts eine ringförmige Vertiefung (29) aufweist, für eine freies Überhängen der Enden der mindestens einen Materialbahn (4, 5).Long-nip roller press according to Claim 5, characterized in that the counter-roller (2) has an annular recess (29) in the region of the freewheel section, for free overhanging of the ends of the at least one material web (4, 5). Langspalt-Walzenpresse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Stützring (25) einstückig ausgebildet ist mit einem elastischen Belag (17) der Gegenwalze (2).Long-nip roller press according to one of claims 1 to 6, characterized in that the support ring (25) is formed in one piece with an elastic covering (17) of the counter-roller (2). Langspalt-Walzenpresse nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Stützring (25) jeweils aus einem Kunststoffmaterial besteht.Long-nip roller press according to one of Claims 1 to 7, characterized in that the support ring (25) consists in each case of a plastic material. Langspalt-Walzenpresse nach Anspruch 8, dadurch gekennzeichnet, daß als Kunststoffmaterial Epoxidharz oder Polyamid verwendbar ist.Long-nip roller press according to claim 8, characterized in that epoxy resin or polyamide can be used as the plastic material.
    EP02017876A 2001-08-14 2002-08-09 Extended nip press for dewatering a fibrous web Expired - Lifetime EP1284319B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10138807 2001-08-14
    DE10138807A DE10138807C1 (en) 2001-08-14 2001-08-14 Extended nip formation apparatus for calendering paper web, has support ring which is arranged at distance from mating face, to form opposing bearing for outer belt support on mating roll

    Publications (2)

    Publication Number Publication Date
    EP1284319A1 true EP1284319A1 (en) 2003-02-19
    EP1284319B1 EP1284319B1 (en) 2006-10-18

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    ID=7694711

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02017876A Expired - Lifetime EP1284319B1 (en) 2001-08-14 2002-08-09 Extended nip press for dewatering a fibrous web

    Country Status (4)

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    EP (1) EP1284319B1 (en)
    AT (1) ATE343015T1 (en)
    DE (2) DE10138807C1 (en)
    ES (1) ES2273955T3 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2007015570A1 (en) * 2005-08-01 2007-02-08 Ichikawa Co., Ltd. Papermaking felt

    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3607941A1 (en) * 1985-10-30 1987-05-07 Escher Wyss Gmbh Pressing device for dewatering a web of material

    Family Cites Families (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3503240A1 (en) * 1985-01-31 1986-08-07 J.M. Voith Gmbh, 7920 Heidenheim WET PRESS FOR DRAINING A FIBER TRAIN

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3607941A1 (en) * 1985-10-30 1987-05-07 Escher Wyss Gmbh Pressing device for dewatering a web of material

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2007015570A1 (en) * 2005-08-01 2007-02-08 Ichikawa Co., Ltd. Papermaking felt

    Also Published As

    Publication number Publication date
    ES2273955T3 (en) 2007-05-16
    DE50208477D1 (en) 2006-11-30
    DE10138807C1 (en) 2003-01-23
    ATE343015T1 (en) 2006-11-15
    EP1284319B1 (en) 2006-10-18

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