EP0839953B1 - Shoe press - Google Patents

Shoe press Download PDF

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Publication number
EP0839953B1
EP0839953B1 EP97116757A EP97116757A EP0839953B1 EP 0839953 B1 EP0839953 B1 EP 0839953B1 EP 97116757 A EP97116757 A EP 97116757A EP 97116757 A EP97116757 A EP 97116757A EP 0839953 B1 EP0839953 B1 EP 0839953B1
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EP
European Patent Office
Prior art keywords
shoe
roll
axial end
flexible
roller
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
EP97116757A
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German (de)
French (fr)
Other versions
EP0839953A1 (en
Inventor
Joachim Dr. Grabscheid
Christian Schiel
Andreas SCHÜTTE
Wolfgang Schuwerk
Werner Leitenberger
Uwe Matuschczyk
Christian Steger
Wolf-Gunter Stotz
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Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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Publication date
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Publication of EP0839953A1 publication Critical patent/EP0839953A1/en
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Publication of EP0839953B1 publication Critical patent/EP0839953B1/en
Anticipated expiration legal-status Critical
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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/0209Wet presses with extended press nip
    • D21F3/0218Shoe presses
    • D21F3/0227Belts or sleeves therefor
    • D21F3/0245Means for fixing the sleeve to the roller end
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/0209Wet presses with extended press nip
    • D21F3/0218Shoe presses

Definitions

  • the present invention relates to a shoe press, in particular for a paper machine, with at least one roller, the one flexible around a stationary carrier Roll cover includes, in its two axial end regions each via a support device on the carrier of Roller is rotatably mounted, and at least one one Support surface for the inside of the roll shell Shoe includes.
  • the shoe presses of the type mentioned are flexible Roll shell usually through the concave bent inwards Press shoe pressed against a rigid counter roll. Between Press roll and counter roll creates a press nip, which has a certain length in the direction of feed of the material to be pressed, so-called press zone length. The longer this press zone is, the larger the at the same contact pressure of the Press shoe placed on the material to be pressed. The contact pressure the press shoe can over in the feed direction the press zone can also be different, i.e. a gradient exhibit.
  • the press zone is extended, so the press shoe into consideration.
  • these are with the Lengths of approx. 300 mm reached today limits, because the immersion depth of the flexible roll shell due to the replica of the counter roll concave support surface of the press shoe accordingly increased.
  • Such a strong immersion of the flexible Roller shell has the disadvantage of a strong one Curvature of the roll shell in the inlet and outlet area of the Press opening.
  • the deformations are particularly strong and critical in the area of the two edges of the press shoe, since here also in the axial direction a transition to the radial one Support of the roller jacket due to circular cylinder shape he follows.
  • the invention has for its object a shoe press of the type mentioned in such a way that this Disadvantages do not occur.
  • the deformation of the roll shell in the area of the two axial edges of the Press shoe can be reduced.
  • rollers are each a shoe with a flat support surface have, the support surfaces of the two shoes to each other are essentially parallel and one between them Form press nip, and that at least one support device radially flexible, in particular elastic is.
  • the radially flexible support devices are given one additionally leadership. It also becomes a three-dimensional one Deformation of the roller shell of the pressure roller in the area avoided between the press shoe and the roll jacket support, because by rolling off the flexible support devices the support devices are on the shoe of the counter roller deformed in the same way as the roll shell in the area of the shoe of the pressure roller.
  • the counter roller can use rigid supports for your roll shell be provided without excessive deformation of the roll shell occurs.
  • both have Roll each a radially flexible support device for an axial end portion of their roll shell, wherein these support devices on opposite to each other axial ends of the two rollers and one axial End region of the shoe opposite the other roller are provided and are supported on this.
  • the each other supports of the two rollers can be used as rigid tension discs be formed. Also due to this asymmetrical
  • the jacket support becomes a very small roll jacket deformation achieved, however, both rollers essentially are constructed identically and have the same width can. In addition, the width of the press nip is larger here.
  • rollers there are two Rollers, each having a radially flexible support device for both axial end areas of the roll shell have, the support devices each in pairs are arranged opposite each other.
  • the support devices roll with each other in this embodiment and thus also guarantee a low level Mantle deformation.
  • the two rollers are in the trained essentially the same.
  • a radially flexible support device is preferably one Rim provided with a particularly air-filled tube. This is structurally inexpensive and enables one Adjustment of the radial flexibility of the support device by changing the pressure in the hose.
  • the Rim brackets can be provided.
  • Variable diameter of the rim are preferred for this Elements of the rim can be moved radially. By change of the rim diameter can be the contact pressure of the hose on the counter roller and thereby flexibility and deformation of the roll shell can be adjusted.
  • an additional Sealing hose may be provided.
  • roller jacket and hose are preferably form-fitting connected to each other, the hose in particular its support side with circumferentially extending Grooves is provided, in which corresponding elevations intervene on the inside of the roller shell.
  • the invention can be inflexible support devices eccentric clamping washers provided and a shoe asymmetrical in at least one roller be arranged.
  • the two rollers preferably essentially the same diameter as one another on.
  • the shoe press shown in FIGS. 1 and 2 comprises a first press roll 1 with a stationary support 2 circumferential flexible roll shell 3 and at least one largely flat support surface 4 for the inside 5 of the Roll shell 3 having the first shoe 6.
  • the first shoe 6 of the roller 1 acts with a second, likewise one at least largely flat support surface 7 shoe 8 together, the one rotating around a stationary carrier 9 flexible roll shell 10 of a second roll 11 supports.
  • the support surfaces 4 and 7 of the two shoes 6 and 8 run essentially parallel to one another, preferably with a low average convergence in Running direction of the roll shell 3.
  • the side shields 12, 13 of the two rollers as a rim 14, 15 with air-filled Hose 16, 17 formed.
  • the rim 14, 15 is there rotatably supported on the stationary carrier 2, 9 while the hose 16, 17 is firmly connected to the roll shell 3, 10, in particular is glued. In this way, one radial support of the axial end areas of the roller shells 3, 10 achieved with radial compliance.
  • the two rollers 1 and 11th essentially with respect to that between the rollers 1, 11 formed press nip 20 formed symmetrically to each other. That is, the two roller shells 3, 10 face each other same width and the flexible side plates 12, 13 are arranged opposite each other in pairs.
  • the shoes 6, 8 of both rollers have the same Width and also essentially the same length on.
  • the two shoes 6 and 8 of the two rollers 1 and 11 are each with respect to the assigned stationary carrier 2 or 9 radially adjustable, as indicated by arrows 18 and 19 is. Only roller 1 is preferred Equipped for pressure control, while the Roller 11 only with means to compensate for deflection of the stationary support 9 by radial adjustment of the Shoe 8 is equipped.
  • the roller 1 is therefore self-stressing Press roll formed while the roller 11 does this serves as a counter roll, the shoe 8 at least on one Place radially rigidly connected to the stationary support 9 is, but preferably at two adjacent to the ends of the shoe 8 Put.
  • Press nip 20 By the formed between the two rollers 1 and 11 Press nip 20 is in the illustrated embodiment a paper web 21 and on the roller 1 facing On the side of the paper web 21, a felt belt 22 is guided. in principle can also on the opposite side of the Paper web 21 a felt belt through the press nip 20 become.
  • the invention are the rollers 1, 10 and in particular the Shoes 6, 8 basically designed in the same way as in the first variant shown in FIGS. 1 and 2.
  • the shoes 6, 8 also have a flat, mutually parallel support surface 4 and 7 on.
  • the in 3 shown variant of the invention only the roller 1 with radially flexible side plates 12, 13 in the form of with air-filled tubes 16, 17 provided rims 14, 15 trained while the second roller 11 rigid side shields 112, 113.
  • both the width of the roll shell 10 and the width of the shoe 8 of the second Roller 11 larger than the respective width in the first Roller 1.
  • the width of the roll shell 3 corresponds to the first roller 1 substantially the width of the shoe 8 the second roller 11 so that the two flexible side shields 12, 13 of the first roller 1 the two axial end regions of the shoe 8 of the second roller 11 arranged opposite are.
  • the hoses 16, 17 of the first roller 1 on the shoe 8 of the second roller 11 at Operation of the shoe press can be unrolled.
  • this is the Deformation of the roll shell 3 in the area of the shoes 6, 8 corresponding deformation of the axial end regions of the roll shell 3 by pressing the flexible side plates 12, 13 of the first roller 1 to the shoe 8 of the second roller 11. It is also ensured here that the roller shell 3 between shoe 6 and the two side plates 12, 13 practical no three-dimensional bending deformation is experienced. Due to the larger width of the second roller 11 is here despite the use of rigid side shields 112, 113 excessive bending deformation between the shoe 8 and the two side plates 112, 113 also avoided.
  • both rollers 1, 11 are each with a radially flexible side plate 12 and a radial rigid side plate 113 equipped, but to each other opposite axial ends of the rollers 1, 11 are provided are.
  • the two rollers 1, 11 are against each other staggered that the radially flexible Side plate 12 of the two rollers 1, 11 each on one opposite axial end region of the shoe 6, 8 of the can support each other roller 1, 11. This too becomes a press zone with more even and proportionate little deformation of the roller shells 3, 10 reached.
  • Fig. 5 shows a detail of Fig. 1, from which can be seen is that the hose 16 of the roller 1 on its bearing surface 23 with extending in the circumferential direction of the hose 16 Grooves 24 is provided, in which corresponding elevations 25 corresponding to the inside 5 of the roll shell 3 intervention.
  • the radially flexible, in particular elastic, according to the invention Support of the roll shells 3, 10 on the respective assigned carrier 2, 9 enables an equalization the deformation of the roll shells 3, 10 during the passage the press nip 20.
  • three-dimensional Alternating bending deformations largely avoided and thereby the load on the roller shells 3, 10 is greatly reduced. Their lifespan increases accordingly.

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  • Paper (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

The shoe press assembly, especially in a papermaking machine, has two rollers (1, 11), each with a shoe (6, 8) with flat support surfaces (4, 7). The support surfaces (4, 7) in each shoe (6, 8) are generally parallel to each other, forming a press gap (20) between them. At least one support (12) is radially flexible, and especially elastic. Preferably at least one (1) of the two rollers has radial and flexible supports (12, 13) for both axial ends of the roller mantle (3). The supports (12, 13) are opposite the axial end zones of the shoe (8) of the other roller (11), and support them. The second roller (11) has rigid discs to support the axial end sections of its roller mantle (10). Both rollers (1, 11) each have radial and flexible supports (12) for an axial end zone of the roller mantles (3, 10) and opposite an axial end zone of the shoe (8) with support. The rollers (1, 11) have a rigid disc to support the other axial end zone of the roller mantles (3, 10). The flexible supports (12, 13) can be arranged in pairs for both axial end zones of the roller mantles (3, 10) of both rollers (1, 11). The radial and flexible supports (12, 13) have bellows (14, 15) with an air-filled hose (16, 17).

Description

Die vorliegende Erfindung betrifft eine Schuhpresse, insbesondere für eine Papiermaschine, mit mindestens einer Walze, die einen um einen stationären Träger umlaufenden flexiblen Walzenmantel umfaßt, der in seinen beiden axialen Endbereichen jeweils über eine Abstützvorrichtung auf dem Träger der Walze drehbar gelagert ist, sowie mindestens einen eine Stützfläche für die Innenseite des Walzenmantels aufweisenden Schuh umfaßt.The present invention relates to a shoe press, in particular for a paper machine, with at least one roller, the one flexible around a stationary carrier Roll cover includes, in its two axial end regions each via a support device on the carrier of Roller is rotatably mounted, and at least one one Support surface for the inside of the roll shell Shoe includes.

Bei den Schuhpressen der genannten Art wird der flexible Walzenmantel üblicherweise durch den konkav nach innen gebogenen Preßschuh gegen eine starre Gegenwalze gepreßt. Zwischen Preßwalze und Gegenwalze entsteht so ein Preßspalt, der in Zuführrichtung des Preßgutes eine bestimmte Länge, sogenannte Preßzonenlänge, aufweist. Je länger diese Preßzone ist, desto größer ist der bei gleichem Anpreßdruck des Preßschuhs auf das Preßgut eingebrachte Preßimpuls. Der Anpreßdruck des Preßschuhs kann dabei in Zuführrichtung über die Preßzone auch unterschiedlich sein, also einen Gradienten aufweisen.The shoe presses of the type mentioned are flexible Roll shell usually through the concave bent inwards Press shoe pressed against a rigid counter roll. Between Press roll and counter roll creates a press nip, which has a certain length in the direction of feed of the material to be pressed, so-called press zone length. The longer this press zone is, the larger the at the same contact pressure of the Press shoe placed on the material to be pressed. The contact pressure the press shoe can over in the feed direction the press zone can also be different, i.e. a gradient exhibit.

Beispielsweise bei Papier als Preßgut bestehen steigende Anforderungen unter anderem an dessen Trockengehalt, Glätte und Volumen. Es wird daher angestrebt, den Preßimpuls zu erhöhen. Gleichzeitig soll jedoch der Maximaldruck und der Druckgradient im Preßspalt möglichst gering sein.For example, with paper as pressed material, there are increasing Requirements, among other things, on its dryness, smoothness and volume. It is therefore sought to close the pressing pulse increase. At the same time, however, the maximum pressure and the Pressure gradient in the press nip should be as low as possible.

Um dies zu erreichen, kommt eine Verlängerung der Preßzone, also des Preßschuhs in Betracht. Dieser sind jedoch bei den heute erreichten Längen von ca. 300 mm Grenzen gesetzt, da sich mit steigender Schuhlänge auch die Eintauchtiefe des flexiblen Walzenmantels aufgrund der der Gegenwalze nachgebildeten konkaven Stützfläche des Preßschuhs entsprechend vergrößert. Ein solch starkes Eintauchen des flexiblen Walzenmantels hat unter anderem den Nachteil einer starken Krümmung des Walzenmantels im Ein- und Auslaufbereich des Preßspalts. Besonders stark und kritisch sind die Verformungen im Bereich der beiden Ränder des Preßschuhs, da hier auch in Axialrichtung ein Übergang auf die durch die radiale Abstützung des Walzenmantels bedingte Kreiszylinderform erfolgt.To achieve this, the press zone is extended, so the press shoe into consideration. However, these are with the Lengths of approx. 300 mm reached today limits, because the immersion depth of the flexible roll shell due to the replica of the counter roll concave support surface of the press shoe accordingly increased. Such a strong immersion of the flexible Roller shell has the disadvantage of a strong one Curvature of the roll shell in the inlet and outlet area of the Press opening. The deformations are particularly strong and critical in the area of the two edges of the press shoe, since here also in the axial direction a transition to the radial one Support of the roller jacket due to circular cylinder shape he follows.

Der Erfindung liegt die Aufgabe zugrunde, eine Schuhpresse der eingangs genannten Art so weiterzubilden, daß diese Nachteile nicht auftreten. Insbesondere soll die Verformung des Walzenmantels im Bereich der beiden axialen Ränder des Preßschuhs verringert werden.The invention has for its object a shoe press of the type mentioned in such a way that this Disadvantages do not occur. In particular, the deformation of the roll shell in the area of the two axial edges of the Press shoe can be reduced.

Diese Aufgabe wird dadurch gelöst, daß zwei Walzen vorgesehen sind, die jeweils einen Schuh mit ebener Stützfläche aufweisen, wobei die Stützflächen der beiden Schuhe zueinander im wesentlichen parallel sind und zwischen sich einen Preßspalt bilden, und daß mindestens eine Abstützvorrichtung radial flexibel, insbesondere elastisch ausgebildet ist.This object is achieved in that two rollers are provided are each a shoe with a flat support surface have, the support surfaces of the two shoes to each other are essentially parallel and one between them Form press nip, and that at least one support device radially flexible, in particular elastic is.

Durch die radiale Flexibilität der Abstützung wird eine radiale Nachgiebigkeit der Walzenmantellagerung erzeugt, so daß der Walzenmantel auch im Bereich der Lagerung radial verformbar ist und dadurch eine geringere Biegewechselverformung beim Betrieb der Walze im Bereich der axialen Ränder der Schuhe auftritt. Durch die Preßschuhe mit ebener Stützfläche wird die Eintauchtiefe des Walzenmantels beim Betrieb der Walze im Bereich der Preßzone gegenüber herkömmlichen Schuhpressen mit starrer Gegenwalze in etwa auf die Hälfte reduziert. Zusammen mit der radialen Nachgiebigkeit der Abstützvorrichtungen des Walzenmantels auf den Träger ergibt sich insgesamt eine sehr geringe Verformung des Walzenmantels.Due to the radial flexibility of the support, a radial compliance of the roll shell bearing generated, so that the roller shell is radial also in the area of the bearing is deformable and therefore less bending deformation when operating the roller in the area of the axial edges the shoes appear. Through the press shoes with a flat support surface becomes the immersion depth of the roll shell during operation the roller in the area of the press zone compared to conventional Shoe presses with a rigid counter roller in about half reduced. Along with the radial compliance of the Support devices of the roll shell on the carrier results overall there is very little deformation of the roll shell.

Nach einer Ausgestaltung der Erfindung weist mindestens eine der beiden Walzen radial flexible Abstützvorrichtungen für beide axialen Endbereiche ihres Walzenmantels auf, wobei die Abstützvorrichtungen der einen Walze bevorzugt den beiden axialen Endbereichen des Preßschuhs der anderen Walze gegenüberliegend vorgesehen und auf diesen abstützbar sind. Die radial flexiblen Abstützvorrichtungen erhalten dadurch eine zusätzlich Führung. Außerdem wird dadurch eine dreidimensionale Verformung des Walzenmantels der Anpreßwalze im Bereich zwischen dem Preßschuh und der Walzenmantelabstützung vermieden, denn durch das Abrollen der flexiblen Abstützvorrichtungen auf dem Schuh der Gegenwalze werden die Abstützvorrichtungen in derselben Weise verformt wie der Walzenmantel im Bereich des Schuhs der Anpreßwalze. Die Gegenwalze kann mit starren Abstützvorrichtungen für ihren Walzenmantel versehen sein, ohne daß eine zu starke Verformung des Walzenmantels auftritt.According to one embodiment of the invention, at least one of the two rollers radially flexible support devices for both axial end regions of their roll shell, the Support devices of the one roller prefer the two axial end regions of the press shoe opposite the other roller are provided and can be supported on them. The radially flexible support devices are given one additionally leadership. It also becomes a three-dimensional one Deformation of the roller shell of the pressure roller in the area avoided between the press shoe and the roll jacket support, because by rolling off the flexible support devices the support devices are on the shoe of the counter roller deformed in the same way as the roll shell in the area of the shoe of the pressure roller. The counter roller can use rigid supports for your roll shell be provided without excessive deformation of the roll shell occurs.

Nach einer anderen Ausgestaltung der Erfindung weisen beide Walzen jeweils eine radial flexible Abstützvorrichtung für einen axialen Endbereich ihres Walzenmantels auf, wobei diese Abstützvorrichtungen an zueinander entgegengesetzten axialen Enden der beiden Walzen und jeweils einem axialen Endbereich des Schuhs der jeweils anderen Walze gegenüberliegend vorgesehen und auf diesem abstützbar sind. Die jeweils anderen Abstützvorrichtungen der beiden Walzen können als starre Spannscheiben ausgebildet sein. Auch durch diese asymmetrische Mantelabstützung wird eine sehr geringe Walzenmantelverformung erreicht, wobei jedoch beide Walzen im wesentlichen gleich aufgebaut sind und gleiche Breite aufweisen können. Außerdem ist hier die Breite des Preßspaltes größer.According to another embodiment of the invention, both have Roll each a radially flexible support device for an axial end portion of their roll shell, wherein these support devices on opposite to each other axial ends of the two rollers and one axial End region of the shoe opposite the other roller are provided and are supported on this. The each other supports of the two rollers can be used as rigid tension discs be formed. Also due to this asymmetrical The jacket support becomes a very small roll jacket deformation achieved, however, both rollers essentially are constructed identically and have the same width can. In addition, the width of the press nip is larger here.

Nach einer weiteren Ausgestaltung der Erfindung sind zwei Walzen vorgesehen, die jeweils eine radial flexible Abstützvorrichtung für beide axialen Endbereiche des Walzenmantels aufweisen, wobei die Abstützvorrichtungen jeweils paarweise einander gegenüberliegend angeordnet sind. Die Abstützvorrichtungen rollen bei dieser Ausgestaltung daher jeweils aufeinander ab und gewährleisten dadurch ebenfalls eine geringe Mantelverformung. Darüber hinaus sind die beiden Walzen im wesentlichen übereinstimmend ausgebildet.According to a further embodiment of the invention, there are two Rollers are provided, each having a radially flexible support device for both axial end areas of the roll shell have, the support devices each in pairs are arranged opposite each other. The support devices roll with each other in this embodiment and thus also guarantee a low level Mantle deformation. In addition, the two rollers are in the trained essentially the same.

Als radial flexible Abstützvorrichtung ist bevorzugt eine Felge mit einem insbesondere luftgefüllten Schlauch vorgesehen. Dies ist konstruktiv unaufwendig und ermöglicht eine Einstellung der radialen Flexibilität der Abstützvorrichtung durch Veränderung des Druckes im Schlauch.A radially flexible support device is preferably one Rim provided with a particularly air-filled tube. This is structurally inexpensive and enables one Adjustment of the radial flexibility of the support device by changing the pressure in the hose.

Nach einer weiteren Ausgestaltung der Erfindung kann an der Felge eine Lascheneinspannung vorgesehen sein.According to a further embodiment of the invention, the Rim brackets can be provided.

Nach einer weiteren Ausgestaltung der Erfindung ist der Durchmesser der Felge variabel. Bevorzugt sind hierfür Elemente der Felge radial verschiebbar. Durch Veränderung des Felgendurchmessers kann der Anpreßdruck des Schlauches an der Gegenwalze und dadurch die Flexibilität und Verformung des Walzenmantels eingestellt werden.According to a further embodiment of the invention Variable diameter of the rim. Are preferred for this Elements of the rim can be moved radially. By change of the rim diameter can be the contact pressure of the hose on the counter roller and thereby flexibility and deformation of the roll shell can be adjusted.

Zur Erleichterung der Montage kann nach einer weiteren Ausgestaltung der Erfindung im Schlauch ein zusätzlicher Dichtschlauch vorgesehen sein.To facilitate assembly, another Embodiment of the invention in the hose an additional Sealing hose may be provided.

Walzenmantel und Schlauch sind bevorzugt formschlüssig miteinander verbunden, wobei der Schlauch insbesondere auf seiner Auflageseite mit in Umfangsrichtung erstreckten Rillen versehen ist, in welche korrespondierende Erhebungen auf der Innenseite des Walzenmantels eingreifen. Durch diese Ausgestaltung wird eine feste Verbindung zwischen Schlauch und Walzenmantel erzeugt, die den starken Belastungen bei der Verformung des Schlauches im Betrieb der Walze standhält. Zusätzlich wird durch diese Ausgestaltung die Verbindungsfläche vergrößert, so daß sich bei einer Verklebung von Walzenmantel und Schlauch ebenfalls die Festigkeit der Verbindung erhöht.The roller jacket and hose are preferably form-fitting connected to each other, the hose in particular its support side with circumferentially extending Grooves is provided, in which corresponding elevations intervene on the inside of the roller shell. Through this Design becomes a firm connection between the hose and roller mantle that creates the heavy loads withstands the deformation of the hose during operation of the roller. In addition, this configuration makes the connection surface enlarged, so that when gluing Roller jacket and hose also the strength of the Connection increased.

Nach weiteren Ausgestaltungen der Erfindung können als unflexible Abstützvorrichtungen exzentrische Spannscheiben vorgesehen und in mindestens einer Walze ein Schuh asymmetrisch angeordnet sein. Außerdem weisen die beiden Walzen bevorzugt im wesentlichen untereinander gleichen Durchmesser auf.According to further embodiments of the invention can be inflexible support devices eccentric clamping washers provided and a shoe asymmetrical in at least one roller be arranged. In addition, the two rollers preferably essentially the same diameter as one another on.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend beschrieben. Es zeigen, jeweils in schematischer Darstellung,

Fig. 1 -
einen Längsvertikalschnitt durch eine erste Variante der erfindungsgemäßen Schuhpresse,
Fig. 2
einen Querschnitt durch die Schuhpresse von Fig. 1,
Fig. 3
einen Längsvertikalschnitt durch eine zweite Variante der erfindungsgemäßen Schuhpresse,
Fig. 4
einen Längsvertikalschnitt durch eine dritte Variante der erfindungsgemäßen Schuhpresse, und
Fig. 5
ein Detail von Fig. 1.
Embodiments of the invention are shown in the drawing and are described below. They show, each in a schematic representation,
Fig. 1 -
2 shows a longitudinal vertical section through a first variant of the shoe press according to the invention,
Fig. 2
2 shows a cross section through the shoe press of FIG. 1,
Fig. 3
a vertical vertical section through a second variant of the shoe press according to the invention,
Fig. 4
a longitudinal vertical section through a third variant of the shoe press according to the invention, and
Fig. 5
a detail of Fig. 1st

Die in den Fig. 1 und 2 dargestellte Schuhpresse umfaßt eine erste Preßwalze 1 mit einem um einen stationären Träger 2 umlaufenden flexiblen Walzenmantel 3 und einem eine zumindest weitgehend ebene Stützfläche 4 für die Innenseite 5 des Walzenmantels 3 aufweisenden ersten Schuh 6. Der erste Schuh 6 der Walze 1 wirkt mit einem zweiten, gleichfalls eine zumindest weitgehend ebene Stützfläche 7 aufweisenden Schuh 8 zusammen, der einen um einen stationären Träger 9 umlaufenden flexiblen Walzenmantel 10 einer zweiten Walze 11 stützt. Die Stützflächen 4 und 7 der beiden Schuhe 6 und 8 verlaufen dabei im wesentlichen parallel zueinander, bevorzugt mit einer geringen durchschnittlichen Konvergenz in Laufrichtung des Walzenmantels 3.The shoe press shown in FIGS. 1 and 2 comprises a first press roll 1 with a stationary support 2 circumferential flexible roll shell 3 and at least one largely flat support surface 4 for the inside 5 of the Roll shell 3 having the first shoe 6. The first shoe 6 of the roller 1 acts with a second, likewise one at least largely flat support surface 7 shoe 8 together, the one rotating around a stationary carrier 9 flexible roll shell 10 of a second roll 11 supports. The support surfaces 4 and 7 of the two shoes 6 and 8 run essentially parallel to one another, preferably with a low average convergence in Running direction of the roll shell 3.

Zur Abstützung der beiden axialen Endbereiche der Walzenmäntel 3, 10 der beiden Walzen 1, 11 sind die Seitenschilde 12, 13 der beiden Walzen als Felge 14, 15 mit luftgefülltem Schlauch 16, 17 ausgebildet. Die Felge 14, 15 ist dabei drehbar auf dem stationären Träger 2, 9 gelagert, während der Schlauch 16, 17 mit dem Walzenmantel 3, 10 fest verbunden, insbesondere verklebt ist. Auf diese Weise wird eine radiale Abstützung der axialen Endbereiche der Walzenmäntel 3, 10 mit radialer Nachgiebigkeit erreicht.To support the two axial end areas of the roller shells 3, 10 of the two rollers 1, 11 are the side shields 12, 13 of the two rollers as a rim 14, 15 with air-filled Hose 16, 17 formed. The rim 14, 15 is there rotatably supported on the stationary carrier 2, 9 while the hose 16, 17 is firmly connected to the roll shell 3, 10, in particular is glued. In this way, one radial support of the axial end areas of the roller shells 3, 10 achieved with radial compliance.

Wie in Fig. 1 dargestellt, sind die beiden Walzen 1 und 11 im wesentlichen bezüglich des zwischen den Walzen 1, 11 gebildeten Preßspalts 20 symmetrisch zueinander ausgebildet. Das heißt, die beiden Walzenmäntel 3, 10 weisen untereinander gleiche Breite auf und die flexiblen Seitenschilde 12, 13 sind jeweils paarweise einander gegenüberliegend angeordnet. Auch die Schuhe 6, 8 beider Walzen weisen gleiche Breite und darüber hinaus im wesentlichen auch gleiche Länge auf. As shown in Fig. 1, the two rollers 1 and 11th essentially with respect to that between the rollers 1, 11 formed press nip 20 formed symmetrically to each other. That is, the two roller shells 3, 10 face each other same width and the flexible side plates 12, 13 are arranged opposite each other in pairs. The shoes 6, 8 of both rollers have the same Width and also essentially the same length on.

Die beiden Schuhe 6 und 8 der beiden Walzen 1 und 11 sind jeweils bezüglich des zugeordneten stationären Trägers 2 bzw. 9 radial verstellbar, wie mit Pfeilen 18 und 19 angedeutet ist. Bevorzugt ist dabei lediglich die Walze 1 mit Mitteln zur Anpreßdruckregulierung ausgestattet, während die Walze 11 lediglich mit Mitteln zum Ausgleich einer Durchbiegung des stationären Trägers 9 durch radiale Verstellung des Schuhs 8 ausgerüstet ist. Die Walze 1 ist also als selbstbelastende Preßwalze ausgebildet, während die Walze 11 hierzu als Gegenwalze dient, deren Schuh 8 mindestens an einer Stelle radial starr mit dem stationären Träger 9 verbunden ist, bevorzugt jedoch an zwei den Enden des Schuhs 8 benachbarten Stellen.The two shoes 6 and 8 of the two rollers 1 and 11 are each with respect to the assigned stationary carrier 2 or 9 radially adjustable, as indicated by arrows 18 and 19 is. Only roller 1 is preferred Equipped for pressure control, while the Roller 11 only with means to compensate for deflection of the stationary support 9 by radial adjustment of the Shoe 8 is equipped. The roller 1 is therefore self-stressing Press roll formed while the roller 11 does this serves as a counter roll, the shoe 8 at least on one Place radially rigidly connected to the stationary support 9 is, but preferably at two adjacent to the ends of the shoe 8 Put.

Durch den zwischen den beiden Walzen 1 und 11 gebildeten Preßspalt 20 ist in dem dargestellten Ausführungsbeispiel eine Papierbahn 21 sowie auf der der Walze 1 zugewandten Seite der Papierbahn 21 ein Filzband 22 geführt. Grundsätzlich kann aber auch auf der gegenüberliegenden Seite der Papierbahn 21 ein Filzband durch den Preßspalt 20 geführt werden.By the formed between the two rollers 1 and 11 Press nip 20 is in the illustrated embodiment a paper web 21 and on the roller 1 facing On the side of the paper web 21, a felt belt 22 is guided. in principle can also on the opposite side of the Paper web 21 a felt belt through the press nip 20 become.

Beim Betrieb der dargestellten Schuhpresse ist eine dreidimensionale Biegewechselverformung der Walzenmäntel 3, 10 im Bereich zwischen den Schuhen 6, 8 und dem abgestützten Endbereich der Walzenmäntel 3, 10 weitgehend vermieden, wobei dies durch eine Durchmessereinstellung der Felgen 14, 15 beeinflußt werden kann. Die Beanspruchung der Walzenmäntel 3, 10 ist gegenüber einer starren Abstützung deutlich verringert, so daß sich die Lebensdauer der Walzenmäntel 3, 10 entsprechend erhöht.When operating the shoe press shown is a three-dimensional one Alternating bending deformation of the roll shells 3, 10 in Area between the shoes 6, 8 and the supported end area the roll shells 3, 10 largely avoided, whereby this by adjusting the diameter of the rims 14, 15 can be influenced. The stress on the roller shells 3, 10 is significantly reduced compared to a rigid support, so that the life of the roller shells 3, 10th increased accordingly.

Bei den in den Fig. 3 und 4 dargestellten weiteren Varianten der Erfindung sind die Walzen 1, 10 und insbesondere die Schuhe 6, 8 grundsätzlich in derselben Weise ausgebildet wie bei der in den Fig. 1 und 2 dargestellten ersten Variante. Insbesondere weisen die Schuhe 6, 8 auch hier eine ebene, zueinander im wesentlichen parallele Stützfläche 4 bzw. 7 auf.In the further variants shown in FIGS. 3 and 4 the invention are the rollers 1, 10 and in particular the Shoes 6, 8 basically designed in the same way as in the first variant shown in FIGS. 1 and 2. In particular, the shoes 6, 8 also have a flat, mutually parallel support surface 4 and 7 on.

Im Unterschied zu der ersten Variante ist jedoch bei der in Fig. 3 dargestellten Variante der Erfindung nur die Walze 1 mit radial flexiblen Seitenschilden 12, 13 in Form von mit luftgefüllten Schläuchen 16, 17 versehenen Felgen 14, 15 ausgebildet, während die zweite Walze 11 starre Seitenschilde 112, 113 aufweist. Außerdem ist sowohl die Breite des Walzenmantels 10 als auch die Breite des Schuhs 8 der zweiten Walze 11 größer als die jeweilige Breite bei der ersten Walze 1.In contrast to the first variant, the in 3 shown variant of the invention only the roller 1 with radially flexible side plates 12, 13 in the form of with air-filled tubes 16, 17 provided rims 14, 15 trained while the second roller 11 rigid side shields 112, 113. In addition, both the width of the roll shell 10 and the width of the shoe 8 of the second Roller 11 larger than the respective width in the first Roller 1.

Insbesondere entspricht die Breite des Walzenmantels 3 der ersten Walze 1 im wesentlichen der Breite des Schuhs 8 der zweiten Walze 11, so daß die beiden flexiblen Seitenschilde 12, 13 der ersten Walze 1 den beiden axialen Endbereichen des Schuhs 8 der zweiten Walze 11 gegenüberliegend angeordnet sind. Dies hat zur Folge, daß die Schläuche 16, 17 der ersten Walze 1 auf dem Schuh 8 der zweiten Walze 11 beim Betrieb der Schuhpresse abrollbar sind.In particular, the width of the roll shell 3 corresponds to the first roller 1 substantially the width of the shoe 8 the second roller 11 so that the two flexible side shields 12, 13 of the first roller 1 the two axial end regions of the shoe 8 of the second roller 11 arranged opposite are. As a result, the hoses 16, 17 of the first roller 1 on the shoe 8 of the second roller 11 at Operation of the shoe press can be unrolled.

Anders als bei der ersten Variante wird hier also die der Verformung des Walzenmantels 3 im Bereich der Schuhe 6, 8 entsprechende Verformung der axialen Endbereiche des Walzenmantels 3 durch Anpressen der flexiblen Seitenschilde 12, 13 der ersten Walze 1 an den Schuh 8 der zweiten Walze 11 erreicht. Auch hier ist sichergestellt, daß der Walzenmantel 3 zwischen Schuh 6 und den beiden Seitenschilden 12, 13 praktisch keine dreidimensionale Biegewechselverformung erfährt. Durch die größere Breite der zweiten Walze 11 wird hier trotz der Verwendung von starren Seitenschilden 112, 113 eine zu starke Biegewechselverformung zwischen dem Schuh 8 und den beiden Seitenschilden 112, 113 ebenfalls vermieden.In contrast to the first variant, this is the Deformation of the roll shell 3 in the area of the shoes 6, 8 corresponding deformation of the axial end regions of the roll shell 3 by pressing the flexible side plates 12, 13 of the first roller 1 to the shoe 8 of the second roller 11. It is also ensured here that the roller shell 3 between shoe 6 and the two side plates 12, 13 practical no three-dimensional bending deformation is experienced. Due to the larger width of the second roller 11 is here despite the use of rigid side shields 112, 113 excessive bending deformation between the shoe 8 and the two side plates 112, 113 also avoided.

Bei der in Fig. 4 dargestellten dritten Variante weisen die beiden Walzen 1, 11 sowie ihre Schuhe 6, 8 jeweils wieder gleiche Breite auf. Außerdem sind beide Walzen 1, 11 jeweils mit einem radial flexiblen Seitenschild 12 und einem radial starren Seitenschild 113 ausgerüstet, die jedoch an zueinander entgegengesetzten axialen Enden der Walzen 1, 11 vorgesehen sind. Zudem sind die beiden Walzen 1, 11 so gegeneinander versetzt angeordnet, daß sich der radial flexible Seitenschild 12 der beiden Walzen 1, 11 jeweils auf einem gegenüberliegenden axialen Endbereich des Schuhs 6, 8 der jeweils anderen Walze 1, 11 abstützen kann. Auch hierdurch wird eine Preßzone mit gleichmäßiger und verhältnismäßig geringer Verformung der Walzenmäntel 3, 10 erreicht.In the third variant shown in FIG. 4, the two rollers 1, 11 and their shoes 6, 8 each again same width. In addition, both rollers 1, 11 are each with a radially flexible side plate 12 and a radial rigid side plate 113 equipped, but to each other opposite axial ends of the rollers 1, 11 are provided are. In addition, the two rollers 1, 11 are against each other staggered that the radially flexible Side plate 12 of the two rollers 1, 11 each on one opposite axial end region of the shoe 6, 8 of the can support each other roller 1, 11. This too becomes a press zone with more even and proportionate little deformation of the roller shells 3, 10 reached.

Fig. 5 zeigt ein Detail von Fig. 1, aus welchem erkennbar ist, daß der Schlauch 16 der Walze 1 an seiner Auflagefläche 23 mit in Umfangsrichtung des Schlauches 16 erstreckten Rillen 24 versehen ist, in welche entsprechende Erhebungen 25 auf der Innenseite 5 des Walzenmantels 3 korrespondierend eingreifen. Hierdurch wird eine axial formschlüssige Verbindung sowie eine vergrößerte Kontaktfläche zwischen Schlauch 16 und Walzenmantel 3 geschaffen, die bei einer Verklebung zu einer vergrößerten Festigkeit führt. In derselben Weise können auch alle anderen Schläuche 16, 17 mit dem jeweils zugeordneten Walzenmantel 3, 10 verbunden sein.Fig. 5 shows a detail of Fig. 1, from which can be seen is that the hose 16 of the roller 1 on its bearing surface 23 with extending in the circumferential direction of the hose 16 Grooves 24 is provided, in which corresponding elevations 25 corresponding to the inside 5 of the roll shell 3 intervention. This creates an axially positive connection as well as an enlarged contact area between the hose 16 and roll shell 3 created, with a bond leads to increased strength. In the same way can all other hoses 16, 17 with each associated roll shell 3, 10 connected.

Die erfindungsgemäße radial flexible, insbesondere elastische Abstützung der Walzenmäntel 3, 10 auf dem jeweils zugeordneten Träger 2, 9 ermöglicht eine Vergleichmäßigung der Verformung der Walzenmäntel 3, 10 beim Durchlauf durch den Preßspalt 20. Insbesondere werden dreidimensionale Biegewechselverformungen weitgehend vermieden und dadurch die Belastung der Walzenmäntel 3, 10 stark herabgesetzt. Entsprechend erhöht sich deren Lebensdauer.The radially flexible, in particular elastic, according to the invention Support of the roll shells 3, 10 on the respective assigned carrier 2, 9 enables an equalization the deformation of the roll shells 3, 10 during the passage the press nip 20. In particular, three-dimensional Alternating bending deformations largely avoided and thereby the load on the roller shells 3, 10 is greatly reduced. Their lifespan increases accordingly.

Wichtig ist die erfindungsgemäße Ausbildung der Walzenmantelabstützung insbesondere bei Verwendung eines sogenannten Flachnips, also bei zwei zusammenwirkenden Preßschuhen 6, 8 mit ebener, zueinander paralleler Stützfläche 4, 7, da hierdurch entsprechendes Anpressen der flexiblen Abstützvorrichtung an die Gegenwalze eine der Verformung des Walzenmantels 3, 10 im Bereich der Schuhe 6, 8 übereinstimmende Verformung in den axialen Endbereichen der Walzenmäntel 3, 10 erreicht werden kann. Grundsätzlich bietet der Einsatz aber auch bei anderen Preßschuhen Vorteile. It is important to design the roll shell support according to the invention especially when using a so-called Flat nips, i.e. when two press shoes 6, 8 interact with a flat, parallel support surface 4, 7, as a result of this appropriate pressing of the flexible support device to the counter-roller one of the deformation of the roller shell 3, 10 corresponding deformation in the area of the shoes 6, 8 reached in the axial end regions of the roll shells 3, 10 can be. Basically, the use also offers other press shoes advantages.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Walzeroller
22
Trägercarrier
33
Walzenmantelroll shell
44
Stützflächesupport surface
55
WalzenmantelinnenseiteRoll shell inside
66
Schuhshoe
77
Stützflächesupport surface
88th
Schuhshoe
99
Trägercarrier
1010
Walzenmantelroll shell
1111
Walzeroller
1212
flexibler Seitenschildflexible side plate
1313
flexibler Seitenschildflexible side plate
1414
Felgerim
1515
Felgerim
1616
Schlauchtube
1717
Schlauchtube
1818
Pfeilarrow
1919
Pfeilarrow
2020
Preßspaltnip
2121
Papierbahnpaper web
2222
FilzbandFilzband
2323
Auflageflächebearing surface
2424
Rillegroove
2525
Erhebungensurveys
112112
starrer Seitenschildrigid side plate
113113
starrer Seitenschildrigid side plate

Claims (15)

  1. Shoe press, especially for a paper making machine, having at least one roll (1) which has a flexible roll cover (3) which runs around a stationary support (2) and, in its two axial end regions, is in each case radially rotatably mounted on its support (2) by a supporting device (12, 13), and also comprising a shoe (6) having a supporting surface (4) for the inner side (5) of the roll cover (3),
    characterized in that two rolls (1, 11) are provided, each of which has a shoe (6, 8) with a flat supporting surface (4, 7), the supporting surfaces (4, 7) of the two shoes (6, 8) being substantially parallel to each other and forming a press nip (20) between them, and which in each case have a radially flexible, especially resilient, supporting device (12, 13) for the two axial end regions of the roll cover (3, 10), and in that the supporting devices (12, 13) are in each case arranged opposite each other in pairs.
  2. Shoe press, especially for a paper making machine, having at least one roll (1) which has a flexible roll cover (3) which runs around a stationary support (2) and, in its two axial end regions, is in each case radially rotatably mounted on its support (2) by a supporting device (12, 13), and also comprising a shoe (6) having a supporting surface (4) for the inner side (5) of the roll cover (3),
    characterized in that two rolls (1, 11) are provided, each of which has a shoe (6, 8) with a flat supporting surface (4, 7), the supporting surfaces (4, 7) of the two shoes (6, 8) being substantially parallel to each other and forming a press nip (20) between them, and in that one of the two rolls (1) has radially flexible, especially resilient, supporting devices (12, 13) for the two axial end regions of its roll cover (3), and the supporting devices (12, 13) of this roll (1) are provided opposite the two axial end regions of the shoe (8) of the other roll (11) and can be supported on the said end regions.
  3. Shoe press according to Claim 2, characterized in that the second roll (11) is provided with rigid clamping discs (112, 113) for supporting the axial end regions of its roll cover (10).
  4. Shoe press, especially for a paper making machine, having at least one roll (1) which has a flexible roll cover (3) which runs around a stationary support (2) and, in its two axial end regions, is in each case radially rotatably mounted on its support (2) by a supporting device (12, 13), and also comprising a shoe (6) having a supporting surface (4) for the inner side (5) of the roll cover (3),
    characterized in that two rolls (1, 11) are provided, each of which has a shoe (6, 8) with a flat supporting surface (4, 7), the supporting surfaces (4, 7) of the two shoes (6, 8) being substantially parallel to each other and forming a press nip (20) between them, and in that the two rolls (1, 11) each have a radially flexible, especially resilient, supporting device (12) for an axial end region of its roll cover (3, 10), in that these supporting devices (12) of the two rolls (1, 11) are provided at mutually opposite axial ends of the rolls (1, 11) and in each case opposite an axial end region of the shoe (6, 8) of the respective other roll (1, 11) and can be supported on the said end regions.
  5. Shoe press according to Claim 4, characterized in that the two rolls (1, 11) are each provided with a rigid clamping disc (113) to support the other axial end region of its roll cover (3, 10).
  6. Shoe press according to one of the preceding claims, characterized in that the radially flexible supporting device (12, 13) provided is a wheel rim (14, 15) having a flexible tube (16, 17), in particular an air-filled flexible tube.
  7. Shoe press according to Claim 6, characterized in that a fish plate fixing is provided on the wheel rim (14, 15).
  8. Shoe press according to Claim 6 or 7, characterized in that the diameter of the wheel rim (14, 15) is variable.
  9. Shoe press according to Claim 8, characterized in that elements of the wheel rim (14, 15) can be displaced radially.
  10. Shoe press according to one of Claims 6 to 9, characterized in that an additional flexible sealing tube is provided in the flexible tube (16, 17).
  11. Shoe press according to one of Claims 6 to 10, characterized in that roll cover (3) and flexible tube (16) are connected to each other by a form fit.
  12. Shoe press according to Claim 11, characterized in that on its contact side (23), the flexible tube (16) is provided with grooves (24) extending in the circumferential direction, in which corresponding elevations (25) on the inner side (5) of the roll cover (3) engage.
  13. Shoe press according to one of the preceding claims, characterized in that eccentric clamping discs are provided as an inflexible supporting device (112, 113).
  14. Shoe press according to one of the preceding claims, characterized in that a shoe is arranged asymmetrically in at least one roll.
  15. Shoe press according to one of the preceding claims, characterized in that two rolls (1, 11) having substantially the same diameter as each other are provided.
EP97116757A 1996-11-04 1997-09-26 Shoe press Expired - Lifetime EP0839953B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19645407 1996-11-04
DE19645407A DE19645407A1 (en) 1996-11-04 1996-11-04 Shoe press

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EP0839953A1 EP0839953A1 (en) 1998-05-06
EP0839953B1 true EP0839953B1 (en) 2003-04-02

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US (1) US6126789A (en)
EP (1) EP0839953B1 (en)
JP (1) JPH10131076A (en)
AT (1) ATE236292T1 (en)
CA (1) CA2220616A1 (en)
DE (2) DE19645407A1 (en)

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WO2013014025A1 (en) 2011-07-26 2013-01-31 Voith Patent Gmbh Shoe roll, method for replacing a jacket on a shoe roll, and elastic ring for a shoe roll

Also Published As

Publication number Publication date
DE59709681D1 (en) 2003-05-08
DE19645407A1 (en) 1998-05-07
JPH10131076A (en) 1998-05-19
ATE236292T1 (en) 2003-04-15
US6126789A (en) 2000-10-03
EP0839953A1 (en) 1998-05-06
CA2220616A1 (en) 1998-05-04

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