EP3256640B1 - Refiner plate - Google Patents

Refiner plate Download PDF

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Publication number
EP3256640B1
EP3256640B1 EP15808576.1A EP15808576A EP3256640B1 EP 3256640 B1 EP3256640 B1 EP 3256640B1 EP 15808576 A EP15808576 A EP 15808576A EP 3256640 B1 EP3256640 B1 EP 3256640B1
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Prior art keywords
refining
strips
split
assembly according
rotation axis
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German (de)
French (fr)
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EP3256640A1 (en
Inventor
Martin Schmid
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Voith Patent GmbH
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Voith Patent GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Definitions

  • the invention relates to a grinding arrangement for grinding of water-suspended pulp fibers between two Mahlspalt forming and relatively rotating grinding surfaces, which are formed by Mahlleisten and intervening grooves, wherein the Mahlleisten extend at least with the essential direction component radially with respect to the axis of rotation.
  • mill pulp fibers ie fresh pulp and / or waste paper fibers
  • the refining surfaces used for this purpose because of the relatively rapid wear of the grinding surfaces, are formed by interchangeable grinding sets bolted to the corresponding support surface.
  • Such a grinding arrangement is for example in the DE 10 2012 214980 A1 described.
  • the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
  • an optimal use of the available grinding surface is sought. The object of the invention is therefore to improve the efficiency of the fiber treatment.
  • the distance of the radially inner end of all the milling strips from each other at least one grinding surface from the axis of rotation differs by a maximum of 10%, based on the radial maximum length of the grinding bars, and share some of the Mahlleisten radially outward.
  • this allows a full utilization of the grinding surface and on the other hand, the divisions of Mahlleisten generate turbulence in the suspension to be treated, which improves the entry of the fibers into the treatment gap or between the Mahlleisten. Since this design has no restrictions in the direction of flow, the risk of clogging also decreases. Accordingly, the gap width between the grinding bars can be reduced for further increase in efficiency.
  • a comprehensive utilization of the grinding surface results when the radially inner end of all grinding bars at least one grinding surface is equidistant from the axis of rotation.
  • additional turbulence in the suspension can be generated solely by the fact that the radially inner end of all Mahlleisten at least one grinding surface is different distances from the axis of rotation.
  • the turbulence support the collection of the suspension to be treated between the grinding bars. In order to make full use of this, it is advantageous if mill strips alternate in the circumferential direction at a short distance and at a long distance from the axis of rotation.
  • the division takes place at least some Mahlleisten at least one grinding surface with a different distance from the axis of rotation. This can emanating from the divisions of Mahlleisten Inhomogeneities are extended to the largest possible radial region, which counteracts uneven wear. It is particularly advantageous if the distance of the pitch to the axis of rotation increases or decreases continuously in the circumferential direction of the grinding surface.
  • the distance between the dividing grinding strips increases steadily radially outward in a division section following the division.
  • the opening gap between the grinding bars increases the cutting edge length, which has a correspondingly positive effect on the treatment. It has proven to be optimal if the dividing section extends over a length between 10 and 50 mm.
  • the grinding bars should extend as far as possible parallel outside the dividing sections.
  • at least one of the divided milling strips in each case curves according to a division section following the division.
  • the width of the grooves between the Mahlleisten outside the same, following a division division sections is advantageous if some, preferably all Mahlleisten share in two grinding bars. It has proved to produce the already mentioned constant cutting angle advantageous if, after the division of a grinding bar and on the Division following dividing section only one of the two divided Mahlleisten curved and the curved Mahlelf runs after their curvature parallel to the two adjacent Mahlleisten.
  • the distance of the radially inner end of all Mahlleisten both Mahl lake of the rotation axis by a maximum of 10%, based on the radial maximum length of the grinding bars, differ from each other and share some of the grinding bars radially outward.
  • a grinding gap 1 is formed by a fixed grinding surface 2 coupled to the housing and a grinding surface 3 rotating about a rotation axis 6.
  • the two annular grinding surfaces 2,3 parallel to each other, wherein the distance between these is usually adjustable.
  • the rotating grinding surface 3 is here moved by a rotatably mounted in the housing shaft 7 in the direction of rotation.
  • This shaft 7 is driven by a drive also provided in the housing.
  • the fiber suspension S to be ground passes through an inlet through the center into the grinding gap 1 between the two grinding surfaces 2, 3.
  • the fiber suspension S passes through the cooperating grinding surfaces 2,3 radially outward and leaves the adjoining annular space through a drain. Not shown are the means known per se, with which a force is generated to press the two grinding surfaces 2,3 against each other.
  • Both refining surfaces 2,3 are each made up of several refining plates, as in FIG. 2 and 4 represented, formed, which extend over in each case a peripheral segment of the corresponding grinding surface 2.3. Sequentially juxtaposed in the circumferential direction, the refining plates yield a continuous grinding surface 2, 3.
  • the refining plates and thus also the grinding surfaces are 2.3, as in the FIGS. 2 to 4 shown formed by a plurality of substantially radially extending Mahlleisten 4 and grooves 5 therebetween.
  • Mahlleisten 4 also called knife
  • the grooves 5 extending between the milling strips 4 likewise have a rectangular cross-section and serve as flow channels for the fiber suspension S.
  • the groove depth is usually between 2 and 20 mm.
  • Essential to the invention here is that the distance between the radially inner end of all grinding bars 4 both grinding surfaces of the rotation axis 6 by a maximum of 10%, based on the radial maximum length of the grinding bars 4, with each other. Disregarded here are interruptions of Mahlleisten 4, as required in the segmentation of the grinding surface in refining plates or holes 8 for the attachment of the refining plates.
  • the location of the pitch varies with respect to its distance from the axis of rotation 6. Also a multiple division of a grinding bar 4 radially behind each other is possible.
  • the pitch between the pitch and the rotation axis 6 continuously increases in small steps, so that the circumferentially adjacent pitches are spiral. This contributes significantly to the reduction in price.
  • the length of the dividing section 9 is between 10 and 50 mm.
  • FIG. 4 shows some or, as in FIG. 2 shown, many Mahlleisten 4 in two Mahlbars 4 share.
  • FIG. 4 also shows the possibility that a mill bar 4 radially in succession several times in each case two Mahlleisten 4 shares.
  • the grinding bars 4 run parallel outside the dividing sections 9, wherein, in particular, the non-dividing grinding bars 4 correspond FIG. 4 may have one or more bends.
  • the width of the grooves 5 between the grinding bars 4 outside the, following a division following division sections 9 is the same size.
  • the grinding surface is used extensively, which is why the radially inner end of all grinding strips 4 of both grinding surfaces 2,3 is equidistant from the axis of rotation 6.
  • the radially inner ends of the grinding bars 4 according to FIG. 4 generate additional turbulence and thus improve the collection of the fibers of the pulp suspension S between the grinding bars 4. Therefore, milling strips 4 alternate here in the circumferential direction with a short distance and with a long distance to the axis of rotation 6.

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  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung betrifft eine Mahlanordnung zur Mahlung von wässrig suspendierten Zellstofffasern zwischen zwei, einen Mahlspalt bildenden und relativ zueinander rotierenden Mahlflächen, die von Mahlleisten und dazwischen verlaufenden Nuten gebildet werden, wobei sich die Mahlleisten zumindest mit der wesentlichen Richtungskomponente radial bezüglich der Rotationsachse erstrecken.
Es ist seit langem bekannt, Zellstofffasern, d.h. Frischzellstoff und/oder Altpapierfasern zu mahlen, um bei der daraus hergestellten Faserstoffbahn die gewünschten Eigenschaften, insbesondere hinsichtlich Festigkeit, Formation und Oberfläche erreichen zu können.
Bei den dabei zum Einsatz kommenden Refinern werden die Mahlflächen wegen des relativ schnellen Verschleißes von auswechselbaren, mit der entsprechenden Stützfläche verschraubten Mahlgarnituren gebildet. Eine derartige Mahlanordnung ist beispielsweise in der DE 10 2012 214980 A1 beschrieben.
Für das Erreichen der gewünschten Fasereigenschaften, insbesondere den Mahlgrad müssen die Mahlgarnituren dem zu behandelnden Faserstoff bestmöglich angepasst werden, auch um einen übermäßigen Verschleiß der Garnituren zu verhindern.
Außerdem wird zur Effizienzsteigerung der Faserbehandlung eine optimale Nutzung der verfügbaren Mahlfläche angestrebt.
Die Aufgabe der Erfindung ist es daher die Effizienz der Faserbehandlung zu verbessern.The invention relates to a grinding arrangement for grinding of water-suspended pulp fibers between two Mahlspalt forming and relatively rotating grinding surfaces, which are formed by Mahlleisten and intervening grooves, wherein the Mahlleisten extend at least with the essential direction component radially with respect to the axis of rotation.
It has long been known to mill pulp fibers, ie fresh pulp and / or waste paper fibers, in order to be able to achieve the desired properties, in particular with regard to strength, formation and surface, in the fibrous web produced therefrom.
The refining surfaces used for this purpose, because of the relatively rapid wear of the grinding surfaces, are formed by interchangeable grinding sets bolted to the corresponding support surface. Such a grinding arrangement is for example in the DE 10 2012 214980 A1 described.
To achieve the desired fiber properties, in particular the freeness, the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
In addition, to optimize the efficiency of the fiber treatment, an optimal use of the available grinding surface is sought.
The object of the invention is therefore to improve the efficiency of the fiber treatment.

Diese Aufgabe wird durch die Mahlanordnung nach Anspruch 1 gelöst.This object is achieved by the grinding arrangement according to claim 1.

Erfindungsgemäß unterscheidet sich die Entfernung des radial inneren Endes aller Mahlleisten wenigstens jeweils einer Mahlfläche von der Rotationsachse um maximal 10%, bezogen auf die radiale Maximallänge der Mahlleisten, untereinander und sich einige der Mahlleisten radial nach außen teilen.According to the invention, the distance of the radially inner end of all the milling strips from each other at least one grinding surface from the axis of rotation differs by a maximum of 10%, based on the radial maximum length of the grinding bars, and share some of the Mahlleisten radially outward.

Einerseits ermöglicht dies eine umfassende Ausnutzung der Mahlfläche und andererseits erzeugen die Teilungen der Mahlleisten Turbulenzen in der zu behandelnden Suspension, was den Einzug der Fasern in den Behandlungsspalt bzw. zwischen die Mahlleisten verbessert.
Da dieses Design in Strömungsrichtung keine Verengungen aufweist, verringert sich auch die Verstopfungsgefahr. Dementsprechend kann die Spaltbreite zwischen den Mahlleisten zur weiteren Effizienzsteigerung vermindert werden.On the one hand, this allows a full utilization of the grinding surface and on the other hand, the divisions of Mahlleisten generate turbulence in the suspension to be treated, which improves the entry of the fibers into the treatment gap or between the Mahlleisten.
Since this design has no restrictions in the direction of flow, the risk of clogging also decreases. Accordingly, the gap width between the grinding bars can be reduced for further increase in efficiency.

Hierbei werden Unterbrechungen der Mahlleisten infolge von Bohrungen in der Mahlgarnitur, wie sie zu Befestigungszwecken erforderlich sind, und infolge Segmentierung der Mahlfläche nicht berücksichtigt. Dies bedeutet, dass wir diese Mahlleisten bei der Erfindungsbeschreibung wegen ihrer geringen Relevanz für die Erfindung als durchgehend betrachten.In this case, interruptions of the Mahlleisten due to holes in the grinding set, as they are required for mounting purposes, and due to segmentation of the grinding surface are not taken into account. This means that we consider these mill bars in the description of the invention because of their low relevance to the invention as a continuous.

Eine umfassende Ausnutzung der Mahlfläche ergibt sich, wenn das radial innere Ende aller Mahlleisten wenigstens einer Mahlfläche gleichweit von der Rotationsachse entfernt ist.
Allerdings lassen sich zusätzliche Turbulenzen in der Suspension allein dadurch erzeugen, dass das radial innere Ende aller Mahlleisten wenigstens einer Mahlfläche unterschiedlich weit von der Rotationsachse entfernt ist. Auch hier können die Turbulenzen den Einzug der zu behandelnden Suspension zwischen die Mahlleisten unterstützen.
Um dies umfassend zu nutzen, ist es vorteilhaft, wenn sich in Umfangsrichtung Mahlleisten mit kurzer Entfernung und mit langer Entfernung zur Rotationsachse abwechseln.A comprehensive utilization of the grinding surface results when the radially inner end of all grinding bars at least one grinding surface is equidistant from the axis of rotation.
However, additional turbulence in the suspension can be generated solely by the fact that the radially inner end of all Mahlleisten at least one grinding surface is different distances from the axis of rotation. Again, the turbulence support the collection of the suspension to be treated between the grinding bars.
In order to make full use of this, it is advantageous if mill strips alternate in the circumferential direction at a short distance and at a long distance from the axis of rotation.

Des Weiteren ist es von Vorteil, wenn die Teilung zumindest einiger Mahlleisten wenigstens einer Mahlfläche mit unterschiedlichem Abstand zur Rotationsachse erfolgt. Hierdurch können die von den Teilungen der Mahlleisten ausgehenden Inhomogenitäten auf einen möglichst großen radialen Bereich erstreckt werden, was einem ungleichmäßigen Verschleiß entgegenwirkt. Hierbei ist es besonders vorteilhaft, wenn sich der Abstand der Teilung zur Rotationsachse in Umfangsrichtung der Mahlfläche kontinuierlich vergrößert bzw. verkleinert.Furthermore, it is advantageous if the division takes place at least some Mahlleisten at least one grinding surface with a different distance from the axis of rotation. This can emanating from the divisions of Mahlleisten Inhomogeneities are extended to the largest possible radial region, which counteracts uneven wear. It is particularly advantageous if the distance of the pitch to the axis of rotation increases or decreases continuously in the circumferential direction of the grinding surface.

Erfindungsgemäß nimmt der Abstand zwischen den sich teilenden Mahlleisten in einem, auf die Teilung folgenden Teilungsabschnitt radial nach außen stetig zu. Der sich öffnende Spalt zwischen den Mahlleisten erhöht die Schnittkantenlänge, was sich entsprechend positiv auf die Behandlung auswirkt.
Dabei hat es sich als optimal erwiesen, wenn sich der Teilungsabschnitt über eine Länge zwischen 10 und 50 mm erstreckt.
Zur Erzeugung eines möglichst konstanten Schnittwinkels der Mahlleisten sollten die Mahlleisten außerhalb der Teilungsabschnitte weitestgehend parallel verlaufen. Hierzu verläuft erfindungsgemäß zumindest jeweils eine der geteilten Mahlleisten nach einem auf die Teilung folgenden Teilungsabschnitt gekrümmt.According to the invention, the distance between the dividing grinding strips increases steadily radially outward in a division section following the division. The opening gap between the grinding bars increases the cutting edge length, which has a correspondingly positive effect on the treatment.
It has proven to be optimal if the dividing section extends over a length between 10 and 50 mm.
In order to produce as constant as possible a cutting angle of the grinding bars, the grinding bars should extend as far as possible parallel outside the dividing sections. For this purpose, according to the invention, at least one of the divided milling strips in each case curves according to a division section following the division.

Um eine gleichmäßige Durchströmung zu fördern, ist erfindungsgemäß die Breite der Nuten zwischen den Mahlleisten außerhalb der, auf eine Teilung folgenden Teilungsabschnitte gleichgroß. Zur Schaffung allmählicher Übergänge bei der Aufteilung der Mahlleisten ist es vorteilhaft, wenn sich einige, vorzugsweise alle Mahlleisten in jeweils zwei Mahlleisten teilen.
Dabei hat es sich zur Erzeugung der bereits erwähnten konstanten Schnittwinkel als vorteilhaft erwiesen, wenn nach der Teilung einer Mahlleiste und einem auf die Teilung folgenden Teilungsabschnitt jeweils nur eine der beiden geteilten Mahlleisten gekrümmt verläuft und die gekrümmte Mahlleiste nach ihrer Krümmung parallel zu den beiden benachbarten Mahlleisten verläuft.In order to promote a uniform flow, according to the invention, the width of the grooves between the Mahlleisten outside the same, following a division division sections. To create gradual transitions in the distribution of Mahlleisten, it is advantageous if some, preferably all Mahlleisten share in two grinding bars.
It has proved to produce the already mentioned constant cutting angle advantageous if, after the division of a grinding bar and on the Division following dividing section only one of the two divided Mahlleisten curved and the curved Mahlleiste runs after their curvature parallel to the two adjacent Mahlleisten.

Zur umfassenden Nutzung der Vorteile der Erfindung sollte sich daher die Entfernung des radial inneren Endes aller Mahlleisten beider Mahlflächen von der Rotationsachse um maximal 10%, bezogen auf die radiale Maximallänge der Mahlleisten, untereinander unterscheiden und sich einige der Mahlleisten radial nach außen teilen.To fully exploit the advantages of the invention, therefore, the distance of the radially inner end of all Mahlleisten both Mahlflächen of the rotation axis by a maximum of 10%, based on the radial maximum length of the grinding bars, differ from each other and share some of the grinding bars radially outward.

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

Figur 1:
einen schematischen Querschnitt durch eine Mahlanordnung;
Figur 2:
eine Mahlplatte;
Figur 3:
einen Ausschnitt gemäß Figur 2 und
Figur 4:
eine andere Mahlplatte.
The invention will be explained in more detail with reference to an exemplary embodiment. In the attached drawing shows:
FIG. 1:
a schematic cross section through a grinding arrangement;
FIG. 2:
a grinding plate;
FIG. 3:
a section according to FIG. 2 and
FIG. 4:
another grinding plate.

Im Gehäuse der Mahlanordnung wird gemäß Figur 1 ein Mahlspalt 1 von einer feststehenden und mit dem Gehäuse gekoppelten Mahlfläche 2 und einer um eine Rotationsachse 6 rotierenden Mahlfläche 3 gebildet.
Dabei verlaufen die beiden kreisringförmigen Mahlflächen 2,3 parallel zueinander, wobei der Abstand zwischen diesen meist einstellbar ist.In the housing of the grinding arrangement is according to FIG. 1 a grinding gap 1 is formed by a fixed grinding surface 2 coupled to the housing and a grinding surface 3 rotating about a rotation axis 6.
In this case, the two annular grinding surfaces 2,3 parallel to each other, wherein the distance between these is usually adjustable.

Die rotierende Mahlfläche 3 wird hier von einer im Gehäuse rotierbar gelagerten Welle 7 in Rotationsrichtung bewegt. Angetrieben wird diese Welle 7 von einem ebenfalls im Gehäuse vorhandenen Antrieb.The rotating grinding surface 3 is here moved by a rotatably mounted in the housing shaft 7 in the direction of rotation. This shaft 7 is driven by a drive also provided in the housing.

Die zu mahlende Fasersuspension S gelangt bei dem hier gezeigten Beispiel über einen Zulauf durch das Zentrum in den Mahlspalt 1 zwischen den beiden Mahlflächen 2,3.In the example shown here, the fiber suspension S to be ground passes through an inlet through the center into the grinding gap 1 between the two grinding surfaces 2, 3.

Die Fasersuspension S passiert die zusammenwirkenden Mahlflächen 2,3 radial nach außen und verlässt den sich anschließenden Ringraum durch einen Ablauf.
Nicht dargestellt sind die an sich bekannten Mittel, mit denen eine Kraft erzeugt wird, um die beiden Mahlflächen 2,3 gegeneinander zu drücken.The fiber suspension S passes through the cooperating grinding surfaces 2,3 radially outward and leaves the adjoining annular space through a drain.
Not shown are the means known per se, with which a force is generated to press the two grinding surfaces 2,3 against each other.

Beide Mahlflächen 2,3 werden jeweils von mehreren Mahlplatten, wie in Figur 2 und 4 dargestellt, gebildet, die sich über jeweils ein Umfangsegment der entsprechenden Mahlfläche 2,3 erstrecken.
In Umfangsrichtung nebeneinander gereiht ergeben die Mahlplatten eine durchgehende Mahlfläche 2,3.Both refining surfaces 2,3 are each made up of several refining plates, as in FIG. 2 and 4 represented, formed, which extend over in each case a peripheral segment of the corresponding grinding surface 2.3.
Sequentially juxtaposed in the circumferential direction, the refining plates yield a continuous grinding surface 2, 3.

Die Mahlplatten und damit auch die Mahlflächen 2,3 werden, wie in den Figuren 2 bis 4 dargestellt, von einer Vielzahl von im Wesentlichen radial verlaufenden Mahlleisten 4 und dazwischenliegenden Nuten 5 gebildet.The refining plates and thus also the grinding surfaces are 2.3, as in the FIGS. 2 to 4 shown formed by a plurality of substantially radially extending Mahlleisten 4 and grooves 5 therebetween.

Der Querschnitt der Mahlleisten 4, auch Messer genannt, ist im Allgemeinen rechteckig, wobei es aber auch andere Formen gibt.
Die zwischen den Mahlleisten 4 verlaufenden Nuten 5 haben ebenfalls einen rechteckigen Querschnitt und dienen als Strömungskanäle für die Fasersuspension S. Die Nuttiefe beträgt meist zwischen 2 und 20 mm.The cross section of Mahlleisten 4, also called knife, is generally rectangular, but there are other forms.
The grooves 5 extending between the milling strips 4 likewise have a rectangular cross-section and serve as flow channels for the fiber suspension S. The groove depth is usually between 2 and 20 mm.

Erfindungswesentlich ist hierbei, dass sich die Entfernung des radial inneren Endes aller Mahlleisten 4 beider Mahlflächen von der Rotationsachse 6 um maximal 10%, bezogen auf die radiale Maximallänge der Mahlleisten 4, untereinander unterscheidet. Unberücksichtigt hiervon sind Unterbrechungen der Mahlleisten 4, wie sie bei der Segmentierung der Mahlfläche in Mahlplatten oder bei Bohrungen 8 für die Befestigung der Mahlplatten erforderlich sind.Essential to the invention here is that the distance between the radially inner end of all grinding bars 4 both grinding surfaces of the rotation axis 6 by a maximum of 10%, based on the radial maximum length of the grinding bars 4, with each other. Disregarded here are interruptions of Mahlleisten 4, as required in the segmentation of the grinding surface in refining plates or holes 8 for the attachment of the refining plates.

Um die Nutbreite bei konstanter und gleicher Breite der Mahlleisten 4 radial nach außen nicht zu groß werden zu lassen, teilen sich zumindest einige Mahlleisten 4 in jeweils zwei Mahlleisten 4 auf.In order not to let the groove width at a constant and equal width of the grinding bars 4 radially outwards become too large, at least some grinding bars 4 are divided into two grinding bars 4 in each case.

Der Ort der Teilung variiert dabei hinsichtlich seiner Entfernung zur Rotationsachse 6. Auch eine mehrfache Aufteilung einer Mahlleiste 4 radial hintereinander ist möglich.The location of the pitch varies with respect to its distance from the axis of rotation 6. Also a multiple division of a grinding bar 4 radially behind each other is possible.

Im Ergebnis verteilen sich so die von der Teilung der Mahlleisten 4 ausgehenden Turbulenzen in der Faserstoffsuspension S und die mit ihr verbundenen Verschleißwirkungen auf die Mahlleisten 4 relativ gleichmäßig über die gesamte Mahlfläche.As a result, the turbulence in the pulp suspension S emanating from the division of the grinding strips 4 and the associated wear effects on the grinding bars 4 are distributed relatively uniformly over the entire grinding surface.

Bei der Ausführung gemäß Figur 4 nimmt der Abstand zwischen Teilung und Rotationsachse 6 in Umfangsrichtung der Mahlfläche in kleinen Schritten kontinuierlich zu, so dass die in Umfangsrichtung benachbarten Teilungen spiralförmig verlaufen.
Dies trägt wesentlich zur Vergleichsmäßigung bei.In the execution according to FIG. 4 In the circumferential direction of the grinding surface, the pitch between the pitch and the rotation axis 6 continuously increases in small steps, so that the circumferentially adjacent pitches are spiral.
This contributes significantly to the reduction in price.

Dabei nimmt der Abstand zwischen den sich teilenden Mahlleisten 4 in einem, auf die Teilung folgenden Teilungsabschnitt 9 radial nach außen stetig zu. Zur Steigerung der Stabilität könnte der sich öffnende Spalt des Teilungsabschnittes 9 zwar mit Material aufgefüllt werden, allerdings überwiegen hier die Vorteile einer erhöhten Schnittkantenlänge.
Die Länge des Teilungsabschnitts 9 liegt zwischen 10 und 50 mm.In this case, the distance between the dividing Mahlleisten 4 in a, following the division following division section 9 radially outward steadily. To increase the stability of the opening gap of the dividing section 9 could indeed be filled with material, but here outweigh the benefits of increased cut edge length.
The length of the dividing section 9 is between 10 and 50 mm.

Entsprechend den Anforderungen an die Mahlfläche können sich, wie in Figur 4, einige oder, wie in Figur 2 gezeigt, viele Mahlleisten 4 in jeweils zwei Mahlleisten 4 teilen.
Figur 4 zeigt außerdem auch die Möglichkeit, dass sich eine Mahlleiste 4 radial hintereinander mehrfach in jeweils zwei Mahlleisten 4 teilt.According to the requirements of the grinding surface can, as in FIG. 4 , some or, as in FIG. 2 shown, many Mahlleisten 4 in two Mahlbars 4 share.
FIG. 4 also shows the possibility that a mill bar 4 radially in succession several times in each case two Mahlleisten 4 shares.

Zur Bildung möglichst konstanter Schnittwinkel verlaufen die Mahlleisten 4 außerhalb der Teilungsabschnitte 9 parallel, wobei insbesondere die sich nicht teilenden Mahlleisten 4 entsprechend Figur 4 eine oder mehrere Krümmungen aufweisen können.In order to form the cutting angle that is as constant as possible, the grinding bars 4 run parallel outside the dividing sections 9, wherein, in particular, the non-dividing grinding bars 4 correspond FIG. 4 may have one or more bends.

Aus gleichem Grund verläuft nach der Teilung einer Mahlleiste 4 und einem auf die Teilung folgenden Teilungsabschnitt 9 jeweils eine der beiden geteilten Mahlleisten 4 gekrümmt.For the same reason, after the division of a grinding bar 4 and a division section 9 following the division, one of the two divided grinding bars 4 runs in each case curved.

Um den Durchfluss der Fasersuspension S nicht zu behindern, ist außerdem die Breite der Nuten 5 zwischen den Mahlleisten 4 außerhalb der, auf eine Teilung folgenden Teilungsabschnitte 9 gleichgroß.
Bei Figur 2 wird die Mahlfläche umfassend genutzt, weshalb das radial innere Ende aller Mahlleisten 4 beider Mahlflächen 2,3 gleichweit von der Rotationsachse 6 entfernt ist.
Im Gegensatz hierzu sollen die radial inneren Enden der Mahlleisten 4 gemäß Figur 4 zusätzliche Turbulenzen erzeugen und so den Einzug der Fasern der Faserstoffsuspension S zwischen die Mahlleisten 4 verbessern. Daher wechseln sich hier in Umfangsrichtung Mahlleisten 4 mit kurzer Entfernung und mit langer Entfernung zur Rotationsachse 6 ab.In order not to hinder the flow of the fiber suspension S, moreover, the width of the grooves 5 between the grinding bars 4 outside the, following a division following division sections 9 is the same size.
at FIG. 2 the grinding surface is used extensively, which is why the radially inner end of all grinding strips 4 of both grinding surfaces 2,3 is equidistant from the axis of rotation 6.
In contrast, the radially inner ends of the grinding bars 4 according to FIG. 4 generate additional turbulence and thus improve the collection of the fibers of the pulp suspension S between the grinding bars 4. Therefore, milling strips 4 alternate here in the circumferential direction with a short distance and with a long distance to the axis of rotation 6.

Claims (10)

  1. Refining assembly for refining aqueously suspended cellulosic fibres between two mutually rotating refining faces (2, 3) forming a refining gap (1), said refining faces being formed by refining strips (4) and grooves (5) running therebetween, wherein
    the refining strips (4) at least by way of the substantial directional component extend radially in relation to the rotation axis (6);
    the distances of the radially inner end of all refining strips (4) of at least in each case one refining face from the rotation axis (6) mutually differ by at most 10% in relation to the radial maximum length of the refining strips (4);
    some of the refining strips (4) are split in a radially outward manner, and the spacing between the split refining strips (4) in a split portion (9) that follows the split steadily increases in a radially outward manner;
    characterized in that at least one of the split refining strips (4) after a split portion (9) that follows the split runs in a curved manner, and the width of the grooves (5) between the refining strips (4) outside the split portions (9) that follow a split is identical.
  2. Refining assembly according to Claim 1,
    characterized in that the radially inner end of all refining strips (4) of at least one refining face (2, 3) are at an identical distance from the rotation axis (6).
  3. Refining assembly according to Claim 1 or 2,
    characterized in that the radially inner end of all refining strips (4) of at least one refining face (2, 3) is dissimilarly spaced apart from the rotation axis (6).
  4. Refining assembly according to Claim 3,
    characterized in that refining strips (4) at a short distance and at a long distance from the rotation axis (6) alternate in the circumferential direction.
  5. Refining assembly according to one of the preceding claims, characterized in that the splitting of at least some refining strips (4) of at least one refining face is performed at dissimilar spacing from the rotation axis (6).
  6. Refining assembly according to Claim 5,
    characterized in that the spacing of the split from the rotation axis (6) continuously increases in the circumferential direction of the refining face.
  7. Refining assembly according to one of the preceding claims, characterized in that some, preferably all, refining strips (4) are split into in each case two refining strips (4).
  8. Refining assembly according to Claim 7,
    characterized in that after the split of a refining strip (4) and a split portion (9) that follows the split, in each case only one of the two split refining strips (4) runs in a curved manner.
  9. Refining assembly according to Claim 8,
    characterized in that the curved refining strip (4) after the curvature thereof runs so as to be parallel with the two neighbouring refining strips (4) .
  10. Refining assembly according to one of the preceding claims, characterized in that the distance of the radially inner end of all refining strips (4) of both refining faces from the rotation axis (6) mutually differs by at most 10% in relation to the radial maximum length of the refining strips, and some of the refining strips (4) are split in a radially outward manner.
EP15808576.1A 2015-02-10 2015-12-11 Refiner plate Active EP3256640B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015202318.4A DE102015202318A1 (en) 2015-02-10 2015-02-10 grinding set
PCT/EP2015/079376 WO2016128092A1 (en) 2015-02-10 2015-12-11 Refiner plate

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EP3256640A1 EP3256640A1 (en) 2017-12-20
EP3256640B1 true EP3256640B1 (en) 2018-11-21

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EP15808576.1A Active EP3256640B1 (en) 2015-02-10 2015-12-11 Refiner plate

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EP (1) EP3256640B1 (en)
CN (1) CN107109789B (en)
DE (2) DE202015009379U1 (en)
ES (1) ES2710324T3 (en)
PT (1) PT3256640T (en)
WO (1) WO2016128092A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120162A1 (en) * 2017-09-01 2019-03-07 Voith Patent Gmbh Conical grinding arrangement
US11643779B2 (en) * 2019-12-13 2023-05-09 Andritz Inc. Refiner plate having grooves imparting rotational flow to feed material
CN114438810B (en) * 2022-01-24 2023-12-29 丹东鸭绿江磨片有限公司 Grinding disc or millstone with narrow pipe teeth and pulping machine

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US100537A (en) * 1870-03-08 Improved mill-stone dress
US3059863A (en) * 1959-04-06 1962-10-23 Bolton John W & Sons Inc Segmental filling for refiner plugs
EP1105560B1 (en) * 1998-08-19 2003-04-23 Durametal Corporation Refiner plate with chicanes
DE102012214980A1 (en) * 2012-08-23 2014-02-27 Voith Patent Gmbh Milling arrangement for milling aqueously suspended cellulose fibers between conical milling surfaces, has closed housing with inlet and outlet, where milling plates of milling surfaces are fixed on supporting surfaces by fastening ring
CN203200584U (en) * 2013-03-27 2013-09-18 杭州江菱造纸机械设备厂 Novel energy-saving pulping machine low-pressure cutting disc
CN204224912U (en) * 2014-09-05 2015-03-25 福伊特专利有限公司 A kind of abrasive disc of papermaking defibrination

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* Cited by examiner, † Cited by third party
Title
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PT3256640T (en) 2019-02-12
DE102015202318A1 (en) 2016-08-11
WO2016128092A1 (en) 2016-08-18
ES2710324T3 (en) 2019-04-24
CN107109789B (en) 2019-12-20
DE202015009379U1 (en) 2017-05-02
EP3256640A1 (en) 2017-12-20
CN107109789A (en) 2017-08-29

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