EP0607584A1 - Process and apparatus for enhancing the functioning of wet presses - Google Patents

Process and apparatus for enhancing the functioning of wet presses Download PDF

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Publication number
EP0607584A1
EP0607584A1 EP93120392A EP93120392A EP0607584A1 EP 0607584 A1 EP0607584 A1 EP 0607584A1 EP 93120392 A EP93120392 A EP 93120392A EP 93120392 A EP93120392 A EP 93120392A EP 0607584 A1 EP0607584 A1 EP 0607584A1
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EP
European Patent Office
Prior art keywords
felt
path
blanket
sensors
roller
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Granted
Application number
EP93120392A
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German (de)
French (fr)
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EP0607584B1 (en
Inventor
Andreas Meschenmoser
Wolf-Gunter Stotz
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Voith Sulzer Papiermaschinen GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Escher Wyss GmbH
Voith Sulzer Papiermaschinen GmbH
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Publication of EP0607584A1 publication Critical patent/EP0607584A1/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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/005—Wire-tensioning devices

Definitions

  • the invention relates to a method and a device for improving the working behavior of wet presses in the treatment of fibrous webs, in particular within a paper machine.
  • EP 0 334 201 and DE-PS 37 19 828 propose a device in which a periodic change in the length of the felt path is achieved by the reciprocating movement of a roller end of a felt tensioning roller. This creates tension in the felt, which is intended to prevent the markings mentioned.
  • the swivel angle is changed step by step according to a fixed time program or depending on the vibration intensity of the rollers to be recorded.
  • a disadvantage of the control via the vibration measurement is that, as soon as the vibrations occur, it can usually be too late to remedy the situation.
  • the timing offers no guarantee that the felt will not remain in one condition for too long due to its inertia and thereby be damaged.
  • important points such as the type of felt, the aging and soiling of the felt and the machine speed are not taken into account, which limits the efficiency of the vibration prevention.
  • the invention is therefore based on the object of a method and an apparatus for To improve the working behavior of wet presses, which avoid the above disadvantages and thus reduce the vibrations more effectively and extend the felt run times.
  • the degree of parallelogram-like tensioning of the felt that occurs is detected by suitable sensors and influences the control of the change in the path of the felt, regardless of how quickly the felt adjusts to a change in path, more effectively reducing markings in the felt and the resulting vibrations.
  • the consequence of this is a substantial extension of the felt run times.
  • the felt path on one outer edge can be gradually lengthened or shortened with respect to the other.
  • a roller with a large felt wrap angle is suitable, in particular a felt tensioning roller, the roller shell of which is rotatably mounted on a likewise rotatably mounted carrier, the roller shell being supported eccentrically at least at one end with respect to the carrier axis, so that the felt path of travel on the side of the eccentric bearing can be changed by rotating the carrier.
  • the carrier is coupled to a gear motor unit, which is controlled by a control with the degree of Felt tension sensing sensors is connected. It is of course also possible to use or adapt the device described in EP 334 201 or DE-PS 37 19 828 to implement the method.
  • the roll shell is mounted eccentrically at both ends and the maximum deviation from the carrier axis is present at the ends of the roll shell in the opposite direction.
  • Light or color-sensitive sensors are particularly suitable for detecting the degree of tension, one of which is attached to each edge of the felt and recognizes the colored markings of the felt there.
  • electro-magnetic sensors on both edges, which are used to identify markings in the form of metal threads, which are preferably woven into the felt at right angles to the machine direction.
  • the measuring principle is based on the fact that the bracing also changes the relative position of the above. Indications to each other has the consequence that can be detected by the sensors and thus provides information about the degree of tension.
  • the felt tensioning roller 1 consists of a roller shell 2 which is rotatably arranged around a carrier 3 and is eccentrically supported on the latter at both ends.
  • the maximum deviation from the carrier axis 4 is in relation to the both ends on opposite sides of the carrier 3.
  • the carrier 3 is also rotatably mounted in the frame 5 and connected at one end to a gear motor unit 6.
  • the speed and possibly also the direction of rotation of the gear-motor unit are influenced by a controller 14 which is connected to sensors 12 arranged on both edges of the felt and detecting the degree of felt tension.
  • Suitable sensors 12 are light- or color-sensitive sensors 12 for recognizing colored markings 13 of the felt 11 as well as electro-magnetic ones for recognizing dirt-insensitive markings 13 in the form of metal threads woven into the felt 11.
  • the relative displacement of the markings 13 is a measure of the degree of bracing.
  • FIG. 2 shows the arrangement of such a roller in a wet press section of a paper machine.
  • guide and deflection rollers 9 and the felt tensioning roller 1 are shown.
  • the paper web 10 and an endless felt 11 rotating over the guide and deflection rollers 9 and the felt tensioning roller 1 are guided through the press nip.
  • the felt 11 partially surrounds the felt tensioning roller 1, so that when the carrier 3 rotates, the felt path of travel changes due to the eccentric bearing of the roller shell 2 (with a constant mean felt tension value), measured on the outer edges of the felt 11. If you want to prevent the markings of the felt 11 and the resulting vibrations of the wet press, it is necessary to change the parallelogram-shaped tension of the felt 11 preferably continuously.
  • the device allows several control variants, on the one hand the path length of the felt path to be extended or shortened can be determined by specifying the maximum angle of rotation of the carrier 3, on the other hand it is also possible to change the path of the felt continuously or step by step until the maximum desired tensioning of the Felt 11, ie a predetermined offset of the markings 13 with respect to the two edges of the felt 11 is set. For entering setpoints or similar input E can be used.

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  • Paper (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

In the wet press section of a paper-making machine, the deg. of the parallelogram-type tension applied to the blanket (11) is registered by sensors (12), for the control to modify the blanket movement path. On reaching a max. tension on the blanket, the system switches between a blanket extension and contraction movement. Also claimed is an appts. with a rotating carrier (3) coupled to a gear-motor unit (6). The mounting of the roller mantle (2) is eccentric, at least at one end, in relation to the carrier axis (4). The motor unit (6) is connected to the sensors (12) through the control (14). On the blanket movement path, one outer edge is extended and shortened, in steps, in relation to the other outer edge to maintain a given blanket (1) movement speed.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Verbesserung des Arbeitsverhaltens von Naßpressen bei der Behandlung von Faserstoffbahnen, insbesondere innerhalb einer Papiermaschine.The invention relates to a method and a device for improving the working behavior of wet presses in the treatment of fibrous webs, in particular within a paper machine.

Bei derartigen Anordnungen kommt es häufig zu Schwingungen des Walzensystems. Das zusammenwirkende Walzenpaar erzeugt infolgedessen Markierungen, d.h. stark zusammengepreßte quer zur Maschinenrichtung verlaufende Zonen im Filz und der Faserstoffbahn. Diese Zonen des Filzes wirken wiederum resonanzartig auf die Naßpresse zurück.With such arrangements, vibrations of the roller system often occur. The cooperating pair of rollers consequently creates marks, i.e. strongly compressed zones running across the machine direction in the felt and the fibrous web. These zones of the felt in turn have a resonant effect on the wet press.

Um dem entgegen zu wirken, wird in der EP 0 334 201 sowie der DE-PS 37 19 828 eine Vorrichtung vorgeschlagen, bei der durch die Hin- und Herbewegung eines Walzenendes einer Filzspannwalze eine periodische Längenänderung des Filzlaufweges erreicht wird. Damit kommt es zu einer Verspannung des Filzes, was die erwähnten Markierungen verhindern soll. Der Schwenkwinkel wird dabei schrittweise nach einem festen zeitlichen Programm oder in Abhängigkeit von der zu erfassenden Schwingungsintensität der Walzen verändert. Nachteilig ist bei der Steuerung über die Schwingungsmessung, daß es, sobald die Schwingungen auftreten, meist schon zu spät für eine Abhilfe sein kann. Die zeitliche Steuerung wiederum bietet keine Garantie, daß der Filz aufgrund seiner Trägheit nicht zu lange in einem Zustand verbleibt und dadurch Schaden nimmt. Außerdem bleiben wichtige Punkte, wie die Filz-Art, die Filzalterung und -verschmutzung sowie die Maschinengeschwindigkeit, unberücksichtigt, was die Effizienz der Schwingungsverhütung einschränkt.To counteract this, EP 0 334 201 and DE-PS 37 19 828 propose a device in which a periodic change in the length of the felt path is achieved by the reciprocating movement of a roller end of a felt tensioning roller. This creates tension in the felt, which is intended to prevent the markings mentioned. The swivel angle is changed step by step according to a fixed time program or depending on the vibration intensity of the rollers to be recorded. A disadvantage of the control via the vibration measurement is that, as soon as the vibrations occur, it can usually be too late to remedy the situation. The timing, in turn, offers no guarantee that the felt will not remain in one condition for too long due to its inertia and thereby be damaged. In addition, important points such as the type of felt, the aging and soiling of the felt and the machine speed are not taken into account, which limits the efficiency of the vibration prevention.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Verbesserung des Arbeitsverhaltens von Naßpressen zu schaffen, die die o.g. Nachteile vermeiden und somit die Schwingungen wirksamer mindern sowie die Filzlaufzeiten verlängern.The invention is therefore based on the object of a method and an apparatus for To improve the working behavior of wet presses, which avoid the above disadvantages and thus reduce the vibrations more effectively and extend the felt run times.

Erfindungsgemäß wurde die Aufgabe durch das im Anspruch 1 beschriebene Verfahren und die im Anspruch 4 dargestellte Vorrichtung gelöst, wobei die Unteransprüche besondere Ausführungsformen charakterisieren.According to the invention, the object was achieved by the method described in claim 1 and the device shown in claim 4, the subclaims characterizing particular embodiments.

Dadurch, daß bei einer Verlängerung und Verkürzung des Filzlaufweges an einer Außenkante des Filzes in Bezug auf die andere, der Grad der dabei auftretenden parallelogrammartigen Verspannung des Filzes über geeignete Sensoren erfaßt wird und auf die Steuerung der Filzlaufwegveränderung Einfluß nimmt, gelingt es, unabhängig davon, wie schnell sich der Filz auf eine Wegveränderung einstellt, Markierungen im Filz und daraus resultierende Schwingungen wirksamer zu vermindern. Die Folge davon ist eine wesentliche Verlängerung der Filzlaufzeiten.By extending and shortening the path of the felt on one outer edge of the felt with respect to the other, the degree of parallelogram-like tensioning of the felt that occurs is detected by suitable sensors and influences the control of the change in the path of the felt, regardless of how quickly the felt adjusts to a change in path, more effectively reducing markings in the felt and the resulting vibrations. The consequence of this is a substantial extension of the felt run times.

Bei der Realisierung des Verfahrens ergeben sich mehrere Möglichkeiten. Beispielsweise kann der Filzlaufweg an einer Außenkante in Bezug auf die andere schrittweise verlängert bzw. verkürzt werden.There are several options for implementing the method. For example, the felt path on one outer edge can be gradually lengthened or shortened with respect to the other.

Noch sicherer ist es natürlich, wenn die Verlängerung und Verkürzung des Filzlaufweges so schnell und/oder so weit erfolgt, daß eine festgelegte Geschwindigkeit der Verspannungsänderung des Filzes eingehalten wird.It is of course even safer if the lengthening and shortening of the felt path is carried out so quickly and / or to such an extent that a defined rate of change in the tension of the felt is maintained.

Für die Umsetzung des Verfahrens eignet sich eine Walze mit großem Filzumschlingungswinkel, insbesondere eine Filzspannwalze, deren Walzenmantel rotierbar auf einem ebenfalls drehbar gelagerten Träger gelagert ist, wobei die Lagerung des Walzenmantels zumindest an einem Ende in Bezug auf die Trägerachse exzentrisch erfolgt, so daß der Filzlaufweg auf der Seite der exzentrischen Lagerung durch Drehen des Trägers veränderbar ist. Der Träger ist dabei mit einer Getriebe-Motor-Einheit gekoppelt, die über eine Steuerung mit den Grad der Filzverspannung erfassenden Sensoren verbunden ist. Es ist selbstverständlich auch möglich, die in der EP 334 201 bzw. der DE-PS 37 19 828 beschriebene Vorrichtung zur Realisierung des Verfahrens zu nutzen bzw. anzupassen.For the implementation of the method, a roller with a large felt wrap angle is suitable, in particular a felt tensioning roller, the roller shell of which is rotatably mounted on a likewise rotatably mounted carrier, the roller shell being supported eccentrically at least at one end with respect to the carrier axis, so that the felt path of travel on the side of the eccentric bearing can be changed by rotating the carrier. The carrier is coupled to a gear motor unit, which is controlled by a control with the degree of Felt tension sensing sensors is connected. It is of course also possible to use or adapt the device described in EP 334 201 or DE-PS 37 19 828 to implement the method.

Vorteilhaft ist es weiterhin, wenn der Walzenmantel an beiden Enden exzentrisch gelagert ist und die maximale Abweichung von der Trägerachse an den Enden des Walzenmantels in entgegengesetzter Richtung vorhanden ist.It is also advantageous if the roll shell is mounted eccentrically at both ends and the maximum deviation from the carrier axis is present at the ends of the roll shell in the opposite direction.

Für die Erfassung des Grades der Verspannung eignen sich besonders licht- bzw. farbempfindliche Sensoren, von denen je einer gegenüber jeder Kante des Filzes angebracht ist und dort vorhandene, farbige Kennzeichnungen des Filzes erkennen. Es ist aber genauso gut möglich, an beiden Kanten elektro-magnetische Sensoren vorzusehen, die zur Erkennung von Kennzeichnungen in Form von Metallfäden dienen, welche vorzugsweise quer zur Maschinenlaufrichtung in den Filz eingewebt sind.Light or color-sensitive sensors are particularly suitable for detecting the degree of tension, one of which is attached to each edge of the felt and recognizes the colored markings of the felt there. However, it is equally possible to provide electro-magnetic sensors on both edges, which are used to identify markings in the form of metal threads, which are preferably woven into the felt at right angles to the machine direction.

Das Meßprinzip basiert darauf, daß die Verspannung auch eine Veränderung der relativen Lage der o.g. Kennzeichnungen zueinander zur Folge hat, die über die Sensoren erfaßt werden kann und damit Aufschluß über den Grad der Verspannung gibt.The measuring principle is based on the fact that the bracing also changes the relative position of the above. Indications to each other has the consequence that can be detected by the sensors and thus provides information about the degree of tension.

Nachfolgend soll die Erfindung an einem Ausführungsbeispiel der Vorrichtung näher erläutert werden. In der beigefügten Zeichnung zeigen:

Fig. 1
eine schematische Darstellung eines Längsschnittes durch die erfindungsgemäße Walze mit der Getriebe-Motor-Einheit 6, einer Steuerung 14 sowie Sensoren 12 und
Fig. 2
eine schematische Seitenansicht eines Naßpressenausschnittes mit einem endlosen Filz 11.
The invention will be explained in more detail below using an exemplary embodiment of the device. The attached drawing shows:
Fig. 1
is a schematic representation of a longitudinal section through the roller according to the invention with the gear motor unit 6, a controller 14 and sensors 12 and
Fig. 2
a schematic side view of a wet press section with an endless felt 11th

Wie aus der Fig. 1 hervorgeht, besteht die Filzspannwalze 1 aus einem Walzenmantel 2, der rotierbar um einen Träger 3 angeordnet und an beiden Enden exzentrisch auf diesem gelagert ist. Die maximale Abweichung von der Trägerachse 4 ist dabei bezüglich der beiden Enden auf entgegengesetzten Seiten des Trägers 3 zu verzeichnen. Um die erwähnte Aufgabe erfüllen zu können, ist auch der Träger 3 in dem Rahmen 5 drehbar gelagert und an einem Ende mit einer Getriebe-Motor-Einheit 6 verbunden. Die Drehzahl und gegebenenfalls auch die Drehrichtung der Getriebe-Motor-Einheit werden dabei von einer Steuerung 14 beeinflußt, die mit an beiden Kanten des Filzes angeordneten, den Grad der Filzverspannung erfassenden Sensoren 12 in Verbindung steht. Als Sensoren 12 eignen sich licht- bzw. farbempfindliche Sensoren 12 zur Erkennung von farbigen Kennzeichnungen 13 des Filzes 11 genauso wie elektro-magnetische zur Erkennung von schmutzunempfindlichen Kennzeichnungen 13 in Form von im Filz 11 eingewebten Metallfäden. Die Relativverschiebung der Kennzeichnungen 13 ist ein Maß für den Grad der Verspannung.As can be seen from FIG. 1, the felt tensioning roller 1 consists of a roller shell 2 which is rotatably arranged around a carrier 3 and is eccentrically supported on the latter at both ends. The maximum deviation from the carrier axis 4 is in relation to the both ends on opposite sides of the carrier 3. In order to be able to achieve the above-mentioned task, the carrier 3 is also rotatably mounted in the frame 5 and connected at one end to a gear motor unit 6. The speed and possibly also the direction of rotation of the gear-motor unit are influenced by a controller 14 which is connected to sensors 12 arranged on both edges of the felt and detecting the degree of felt tension. Suitable sensors 12 are light- or color-sensitive sensors 12 for recognizing colored markings 13 of the felt 11 as well as electro-magnetic ones for recognizing dirt-insensitive markings 13 in the form of metal threads woven into the felt 11. The relative displacement of the markings 13 is a measure of the degree of bracing.

Die Anordnung einer derartigen Walze in einer Naßpressenpartie einer Papiermaschine zeigt die Fig. 2. Neben den einen Preßspalt bildenden Walzen 7 und 8 sind Leit- und Umlenkwalzen 9 sowie die Filzspannwalze 1 dargestellt. Durch den Preßspalt wird hierbei die Papierbahn 10 sowie ein endloser, über die Leit- und Umlenkwalzen 9 sowie die Filzspannwalze 1 umlaufender Filz 11 geführt. Der Filz 11 umschließt teilweise die Filzspannwalze 1, so daß sich bei einer Drehung des Trägers 3 der Filzlaufweg aufgrund der exzentrischen Lagerung des Walzenmantels 2 (bei konstantem mittlerem Filzspannungswert), gemessen an den Außenkanten des Filzes 11, verändert. Will man die Markierungen des Filzes 11 und die daraus resultierenden Schwingungen der Naßpresse verhindern, so ist es erforderlich, die parallelogrammförmige Verspannung des Filzes 11 vorzugsweise ständig zu ändern.FIG. 2 shows the arrangement of such a roller in a wet press section of a paper machine. In addition to the rollers 7 and 8 forming a press nip, guide and deflection rollers 9 and the felt tensioning roller 1 are shown. The paper web 10 and an endless felt 11 rotating over the guide and deflection rollers 9 and the felt tensioning roller 1 are guided through the press nip. The felt 11 partially surrounds the felt tensioning roller 1, so that when the carrier 3 rotates, the felt path of travel changes due to the eccentric bearing of the roller shell 2 (with a constant mean felt tension value), measured on the outer edges of the felt 11. If you want to prevent the markings of the felt 11 and the resulting vibrations of the wet press, it is necessary to change the parallelogram-shaped tension of the felt 11 preferably continuously.

Durch die Erfassung der Verspannung mit Hilfe der Sensoren 12 ist es möglich, Veränderungen des Filzlaufweges entsprechend zu beeinflussen und damit unabhängig von störenden Einflüssen zu gestalten. Dabei erlaubt die Vorrichtung mehrere Steuerungsvarianten, einerseits kann der zu verlängernde bzw. zu verkürzende Wegbetrag des Filzlaufweges durch Vorgabe des maximalen Drehwinkels des Trägers 3 festgelegt werden, andererseits ist es auch möglich, den Filzlaufweg kontinuierlich oder schrittweise so weit zu verändern, bis sich die maximal gewünschte Verspannung des Filzes 11, d.h. ein vorgegebener Versatz der Kennzeichnungen 13 bezüglich der beiden Kanten des Filzes 11 einstellt. Zur Eingabe von Sollwerten o.ä. kann hierbei der Eingang E verwendet werden.By detecting the tension with the help of the sensors 12, it is possible to influence changes in the felt path accordingly and thus to make them independent of disruptive influences. The device allows several control variants, on the one hand the path length of the felt path to be extended or shortened can be determined by specifying the maximum angle of rotation of the carrier 3, on the other hand it is also possible to change the path of the felt continuously or step by step until the maximum desired tensioning of the Felt 11, ie a predetermined offset of the markings 13 with respect to the two edges of the felt 11 is set. For entering setpoints or similar input E can be used.

Noch vorteilhafter ist es allerdings, wenn die Verlängerung und Verkürzung des Filzlaufweges so schnell und/oder so weit erfolgt, daß eine vorgegebene Geschwindigkeit der Verspannungsänderung des Filzes 11 eingehalten wird.However, it is even more advantageous if the lengthening and shortening of the felt path is so rapid and / or so far that a predetermined rate of change in tension of the felt 11 is maintained.

Claims (7)

Verfahren zur Verbesserung des Arbeitsverhaltens von Naßpressen mit einem endlosen, umlaufenden, über Leit- oder Umlenkeinrichtungen sowie gemeinsam mit einer zu entwässernden Faserstoffbahn durch einen von einem Walzenpaar gebildeten Preßspalt geführten Filz, wobei der Filzlaufweg an einer Außenkante des Filzes in Bezug auf die andere verlängert und verkürzt wird,
dadurch gekennzeichnet,
daß der Grad der parallelogrammartigen Verspannung des Filzes (11) über Sensoren (12) erfaßt wird und auf die Steuerung der Filzlaufwegveränderung derart Einfluß nimmt, daß bei Erreichen einer maximal gewünschten Verspannung des Filzes (11) eine Umschaltung zwischen Verlängerung und Verkürzung des Filzlaufweges erfolgt.Process for improving the working behavior of wet presses with an endless, rotating, via guiding or deflecting devices and together with a fibrous web to be dewatered through a felt guided by a press nip formed by a pair of rolls, the felt path lengthening on one outer edge of the felt with respect to the other and is shortened
characterized by
that the degree of parallelogram-like tensioning of the felt (11) is detected by sensors (12) and influences the control of the change in the felt travel path in such a way that when a maximum desired tensioning of the felt (11) is reached, a switchover between extension and shortening of the felt travel path takes place. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß der Filzlaufweg an einer Außenkante in Bezug auf die andere schrittweise verlängert bzw. verkürzt wird.Method according to claim 1,
characterized by
that the felt path on one outer edge is gradually lengthened or shortened with respect to the other. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Verlängerung bzw. Verkürzung des Filzlaufweges derart erfolgt, daß eine bestimmte Geschwindigkeit der Verspannungsänderung des Filzes (11) eingehalten wird.The method of claim 1 or 2,
characterized by
that the lengthening or shortening of the felt path is carried out in such a way that a certain speed of the tension change of the felt (11) is maintained. Vorrichtung zur Verbesserung des Arbeitsverhaltens von Naßpressen mit einer Filzspannwalze, die teilweise von einem endlosen, umlaufenden Filz umschlungen ist, der über Leit- oder Umlenkwalzen sowie gemeinsam mit einer zu entwässernden Faserstoffbahn durch einen von einem Walzenpaar gebildeten Preßspalt geführt ist und aus einem um einen Träger angeordneten sowie auf diesem Träger rotierbar gelagerten Walzenmantel besteht,
dadurch gekennzeichnet,
daß der Träger (3) drehbar gelagert und mit einer Getriebe-Motor-Einheit (6) gekoppelt ist, die Lagerung des Walzenmantels (2) zumindest an einem Ende in Bezug auf die Trägerachse (4) exzentrisch erfolgt und die Getriebe-Motor-Einheit (6) über eine Steuerung (14) mit den Grad der Filzverspannung erfassenden Sensoren (12) verbunden ist.Device for improving the working behavior of wet presses with a felt tensioning roller, which is partially wrapped in an endless, rotating felt, the guide or deflection rollers and together with a fibrous web to be dewatered by a pair of rollers formed Press nip is guided and consists of a roll shell arranged around a support and rotatably mounted on this support,
characterized by
that the carrier (3) is rotatably mounted and coupled to a gear motor unit (6), the roller jacket (2) is mounted eccentrically at least at one end with respect to the carrier axis (4) and the gear motor unit (6) is connected via a controller (14) to the sensors (12) detecting the degree of felt tension. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß der Walzenmantel (2) an beiden Enden in Bezug auf die Trägerachse (4) exzentrisch gelagert ist und die maximale Abweichung von der Trägerachse (4) an den Enden des Walzenmantels (2) in entgegengesetzter Richtung vorhanden ist.Device according to claim 4,
characterized by
that the roller shell (2) is eccentrically mounted at both ends with respect to the carrier axis (4) and the maximum deviation from the carrier axis (4) is present at the ends of the roller shell (2) in the opposite direction. Vorrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet,
daß gegenüber jeder Kante des Filzes (11) je ein licht- bzw. farbempfindlicher Sensor (12) zur Erfassung von farbigen Kennzeichnungen (13) des Filzes (11) vorhanden ist.Device according to claim 4 or 5,
characterized by
that opposite each edge of the felt (11) there is a light- or color-sensitive sensor (12) for detecting colored markings (13) of the felt (11). Vorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet,
daß der Filz (11) Kennzeichnungen (13) in Form eingewebter quer zur Maschinenrichtung verlaufender Metallfäden enthält und gegenüber jeder Kante des Filzes (11) je ein elektro-magnetischer Sensor (12) vorhanden ist.Device according to one of claims 4 to 6,
characterized by
that the felt (11) contains markings (13) in the form of woven metal threads running transversely to the machine direction, and an electro-magnetic sensor (12) is provided opposite each edge of the felt (11).
EP93120392A 1993-01-22 1993-12-17 Process and apparatus for enhancing the functioning of wet presses Expired - Lifetime EP0607584B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4301651A DE4301651C1 (en) 1993-01-22 1993-01-22 Paper-making wet press - has sensors at edges of blanket to register tension for control to modify movement path to prevent oscillation
DE4301651 1993-01-22

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EP0607584A1 true EP0607584A1 (en) 1994-07-27
EP0607584B1 EP0607584B1 (en) 1997-07-30

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EP93120392A Expired - Lifetime EP0607584B1 (en) 1993-01-22 1993-12-17 Process and apparatus for enhancing the functioning of wet presses

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EP (1) EP0607584B1 (en)
AT (1) ATE156206T1 (en)
DE (2) DE4301651C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402005B1 (en) 1998-11-09 2002-06-11 Voith Sulzer Papiertechnik Patent Gmbh Process and device for handling a material web

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5643416A (en) * 1996-06-07 1997-07-01 Beloit Technologies, Inc. Extended nip press with oscillating blanket for extended wear
DE102006024032A1 (en) * 2006-05-23 2007-11-29 Voith Patent Gmbh Arrangement for band regulation
DE102011006134A1 (en) * 2011-03-25 2012-09-27 Voith Patent Gmbh Method for operating a clothing
DE102011006136A1 (en) * 2011-03-25 2012-09-27 Voith Patent Gmbh Apparatus and method for controlling a clothing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077834A (en) * 1975-09-13 1978-03-07 Theo Stark Device for the control of the tension of an endless belt or screen
DE3719828A1 (en) * 1987-06-13 1988-12-22 Kuesters Eduard Maschf WET PRESS
EP0334201A1 (en) * 1988-03-22 1989-09-27 Aigster, Josef Process and apparatus for enhancing the functioning of the wet press in a paper machine
DE4011796A1 (en) * 1990-04-12 1991-10-17 Voith Gmbh J M Paper-making blanket floating roller - has sliding bearing to move at right angles to plane of blanket travel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077834A (en) * 1975-09-13 1978-03-07 Theo Stark Device for the control of the tension of an endless belt or screen
DE3719828A1 (en) * 1987-06-13 1988-12-22 Kuesters Eduard Maschf WET PRESS
EP0334201A1 (en) * 1988-03-22 1989-09-27 Aigster, Josef Process and apparatus for enhancing the functioning of the wet press in a paper machine
DE4011796A1 (en) * 1990-04-12 1991-10-17 Voith Gmbh J M Paper-making blanket floating roller - has sliding bearing to move at right angles to plane of blanket travel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402005B1 (en) 1998-11-09 2002-06-11 Voith Sulzer Papiertechnik Patent Gmbh Process and device for handling a material web
US6641017B2 (en) 1998-11-09 2003-11-04 Voith Sulzer Papiertechnik Patent Gmbh Process and device for laterally positioning a material web

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DE59307020D1 (en) 1997-09-04
EP0607584B1 (en) 1997-07-30
DE4301651C1 (en) 1993-12-16
ATE156206T1 (en) 1997-08-15

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