EP0936302B1 - Apparatus for feeding a fibre suspension on a dewatering device - Google Patents

Apparatus for feeding a fibre suspension on a dewatering device Download PDF

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Publication number
EP0936302B1
EP0936302B1 EP98124785A EP98124785A EP0936302B1 EP 0936302 B1 EP0936302 B1 EP 0936302B1 EP 98124785 A EP98124785 A EP 98124785A EP 98124785 A EP98124785 A EP 98124785A EP 0936302 B1 EP0936302 B1 EP 0936302B1
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EP
European Patent Office
Prior art keywords
eccentric shaft
partition
lip
dividing element
feeding
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EP98124785A
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German (de)
French (fr)
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EP0936302A3 (en
EP0936302A2 (en
Inventor
Wilhelm Dipl.-Ing. Mausser
Manfred Ing. Schmid
Walter Writzl
Rudolf Dipl.-Ing. Greimel
Harald Weigant
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Andritz AG
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Andritz AG
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Publication of EP0936302A3 publication Critical patent/EP0936302A3/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/028—Details of the nozzle section

Definitions

  • the invention relates to a device for supplying a Fibrous suspension on a drainage device, in particular for a tissue machine, according to the preamble of claim 1.
  • Such devices also called headbox, affect the Paper formation and thus the paper quality is essential.
  • Headboxes are a regulation of the flow rate of the fiber suspension practically only accessible via printing.
  • two or Multi-layer headboxes that affect the quality of the paper surface however, a different flow rate is possible, such as for different qualities of top and Bottom are required, not realizable.
  • Such a headbox is e.g. in DE 37 04 462 (SULZER-ESCHER-WYSS) revealed.
  • a swivel partition and an adjustable one Lip provided.
  • the setting provided by the However, the mechanism is only very imprecise.
  • US 2,615,374 also describes a so-called headbox with free outlet of the fiber suspension on a sieve, being between sieve and flexible outlet plate there is an outlet gap.
  • the outlet plate is on a support wall assembled, the entire support wall using an eccentric both (from the sieve surface) as well as in the horizontal direction can be swung.
  • the actual setting of the outlet gap takes place by means of a conventional setting device and is accordingly imprecise.
  • such a headbox not be used with a tissue machine where the Fibrous suspension is injected between two sieves.
  • the aim of the invention is therefore the scope and Control options for headboxes, especially for one Tissue machine, improve.
  • the invention is characterized by the features of the characterizing part of claim 1 for setting the Height of the at least one outlet gap between a minimum and The maximum value is an eccentric shaft.
  • the upper lip and the lower lip can each be pivoted about a joint by means of an eccentric.
  • the setting of upper and / or Depending on the version, the lower lip enables two or two Multilayer headbox the optimal conditions for regulating the Flow speed of the individual layers.
  • An advantageous embodiment of the invention is characterized in that that the eccentric shaft is supported several times over the machine width, the support can take place at regular intervals.
  • a favorable embodiment of the invention is characterized in that that the eccentric shaft is connected to a geared motor.
  • the outlet height can also be adjusted during the operation of the paper machine and thus the flow rate of the fiber suspension accordingly be adjusted or regulated.
  • An advantageous development of the invention for a two-layer or Multilayer headbox is characterized in that for separation of the individual areas one or more one-piece separating elements formed from partition and lamella tip with wedge-shaped (s) Blade tip (s) made of steel is or are. So it is possible stable separation and therefore constant adjustment of the outlet gap heights to achieve even with different inlet pressures that a difference in speed between the individual suspension flows can be adjusted.
  • a favorable embodiment of the invention is characterized in that that the slat tip (s) by means of a tie rod against the partition are biased to the feeder. This makes it particularly stable and this enables exact adjustment of the outlet gap heights.
  • FIG. 1 shows a two-layer headbox according to the invention
  • FIG. 1a a detail from FIG. 1
  • FIG. 2 a three-layer headbox
  • FIG. 2a a detail 2
  • FIG. 3 shows a section along line III-III in FIG. 2 represents.
  • Fig. 1 sets up a device for supplying fiber suspensions a drainage device, in particular for a tissue machine, in the form of a two-layer headbox.
  • the suspension fed simultaneously via two channels 1 across the machine direction, then the flow direction of the suspension is 90 degrees in Machine direction redirected.
  • the suspension through two turbulence generating chambers 2 into the nozzle spaces run out discharge chambers 3, 4, at the end of which Leaves device and strikes the drainage device.
  • the two nozzle spaces 3, 4 are separated by a wall 8, which means cannulated screws 9 is biased against the support body 10.
  • At the outlet end of the partition 8 there is a one-piece, Wedge-shaped lamellar tip 12 made of stainless steel, which by means of tie rods 13 is biased against the partition 8.
  • the partition 8 and the Lamellar tip 12 form a solid in the assembled state Separating element between the two nozzle spaces 3, 4.
  • This pivoting movement is carried out by an eccentric shaft 16, 16 ', across the machine width, at regular intervals in bearings 17, 17 'are supported on the rigid cover plates 20, 20' of the device.
  • the eccentricity e of the shafts enables the gap heights to be adjusted a or b between a minimum and maximum value.
  • the construction is designed so that even with constant turning the eccentric shaft 16, 16 'by a drive 22, the upper lip 18th and the lower lip 18 'never in contact with the blade tip 12 come and thus no damage can occur.
  • Fig. 1a shows a detail of the outlet gap in Fig. 1. It is clearly the different size of the outlet gaps a (nozzle space 3) and b (Nozzle area 4) recognizable.
  • Fig. 2 now shows a three-layer headbox, the suspension at the same time into the device via three channels 1 transversely to the machine direction, then the direction of flow of the suspension 90 degrees in the machine direction is redirected.
  • the suspension then flows through three turbulence generating chambers 2 in the nozzle chambers 3, 4, 5 at the end of which they leave the device and on the Dewatering machine.
  • it is between two sieves 24, 24 ', which run around two rollers 25, 25', are injected.
  • the two nozzle spaces 4, 5 become analogous to the embodiment in FIG. 1 separated by a wall 8, at the end of which is a one-piece, wedge-shaped Blade tip 12 made of stainless steel.
  • the partition 8 and in the assembled state, the lamella tip 12 forms a firm, non-adjustable separating element between the two nozzle spaces 4, 5.
  • the two nozzle spaces 3, 4 are separated by a partition 6, which is rotatably mounted about an axis 7.
  • a partition 6 At the outlet end of the Partition 6 is also a one-piece lamella tip 12 ' Stainless steel, which is prestressed against the partition 6 by means of tie rods 11 becomes.
  • the partition 6 and the lamella tip 12 'thus form a rigid one Separating element which, however, is pivoted as a whole about the axis of rotation 7 can be. This swivel movement is carried out by a Eccentric shaft 15 that is regular across the machine width Distances in bearings 19 supported on the rigid rear wall 23 of the device are.
  • the eccentricity e makes it possible to set the outlet gap height c des Nozzle space 4 between a minimum and maximum value and one Fixation of the same.
  • the outlet gap heights a and b of the two nozzle chambers 3 and 5 can also be between a minimum and Maximum value can be set and fixed.
  • the upper lip 18 or lower lip 18 'pivoted about the joints 14, 14'. Is performed this pivoting movement by an eccentric shaft 1, 16 ', which on the Machine width at regular intervals in bearings 17, 17 'on the rigid cover plates 20, 20 'of the device are supported.
  • the eccentricity e of the shafts 16, 16 ' enables the gap heights a to be adjusted and b between a minimum and maximum value.
  • the construction is designed so that even with constant turning the eccentric shafts 16, 16 'through a drive 22 the upper lip 18 and the lower lip 18 'never in contact with the lamella tips 12, 12 'come and thus no damage can occur. This also applies to all positions of the movable partition 6 Blade tip 12 '.
  • Fig. 2a shows a detail of the outlet gap in Fig. 2. You can see the different settings of the outlet gap heights a (nozzle area 3), b (nozzle area 5) and c (nozzle area 4).
  • FIG. 3 shows a section along line III-III in FIG. 1 and analogously in FIG. 2.
  • the eccentric shaft 16 is shown, the multiple over the Machine width is supported in bearings 17.
  • the invention is not restricted to the examples shown. It can e.g. other types of execution of the middle slat be provided.

Description

Die Erfindung betrifft eine Vorrichtung zur Zufuhr einer Faserstoffsuspension auf eine Entwässerungseinrichtung, insbesondere für eine Tissue-Maschine, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for supplying a Fibrous suspension on a drainage device, in particular for a tissue machine, according to the preamble of claim 1.

Derartige Vorrichtungen, auch Stoffauflauf genannt, beeinflussen die Papierbildung und damit die Papierqualität wesentlich. Bei den bisherigen Stoffaufläufen ist eine Regelung der Fließgeschwindigkeit der Faserstoffsuspension praktisch nur über den Druck erreichbar. Bei Zwei- oder Mehrschichtstoffaufläufen, die eine Beeinflussung der Qualität der Papieroberfläche ermöglichen ist allerdings eine unterschiedliche Fließgeschwindigkeit, wie sie z.B. für unterschiedliche Qualitäten der Ober- und Unterseite erforderlich sind, nicht realisierbar.Such devices, also called headbox, affect the Paper formation and thus the paper quality is essential. With the previous ones Headboxes are a regulation of the flow rate of the fiber suspension practically only accessible via printing. With two or Multi-layer headboxes that affect the quality of the paper surface however, a different flow rate is possible, such as for different qualities of top and Bottom are required, not realizable.

Ein solcher Stoffauflauf ist z.B. in der DE 37 04 462 (SULZER-ESCHER-WYSS) geoffenbart. Hier ist eine schwenkbare Trennwand und eine einstellbare Lippe vorgesehen. Die Einstellung durch den vorgesehenen Mechanismus ist jedoch nur sehr ungenau. Außerdem kann wegen der schwenkbaren Trennwand in den beiden Düsenräumen nur der gleiche Druck eingestellt werden. Die US 2,615,374 (MALKIN) beschreibt weiters einen sogenannten Stoffauflaufkasten mit freiem Auslauf der Faserstoffsuspension auf ein Sieb, wobei sich zwischen Sieb und flexibler Auslaufplatte ein Auslaufspalt ergibt. Die Auslaufplatte ist an einer Trägerwand montiert, wobei die gesamte Trägerwand mit Hilfe eines Exzenters sowohl (von der Sieboberfläche) angehoben als auch in horizontaler Richtung geschwungen werden kann. Die eigentliche Einstellung des Auslaufspaltes erfolgt mittels einer konventionellen Einstellvorrichtung und ist dementsprechend unpräzise. Außerdem kann ein derartiger Stoffauflaufkasten nicht bei einer Tissuemaschine eingesetzt werden, bei der die Faserstoffsuspension zwischen zwei Siebe eingedüst wird.Such a headbox is e.g. in DE 37 04 462 (SULZER-ESCHER-WYSS) revealed. Here is a swivel partition and an adjustable one Lip provided. The setting provided by the However, the mechanism is only very imprecise. In addition, because of pivoting partition in the two nozzle rooms only the same Pressure can be set. US 2,615,374 (MALKIN) also describes a so-called headbox with free outlet of the fiber suspension on a sieve, being between sieve and flexible outlet plate there is an outlet gap. The outlet plate is on a support wall assembled, the entire support wall using an eccentric both (from the sieve surface) as well as in the horizontal direction can be swung. The actual setting of the outlet gap takes place by means of a conventional setting device and is accordingly imprecise. In addition, such a headbox not be used with a tissue machine where the Fibrous suspension is injected between two sieves.

Ziel der Erfindung ist es daher, den Anwendungsbereich und die Steuerungsmöglichkeiten von Stoffaufläufen, insbesondere für eine Tissue-Maschine, zu verbessern.The aim of the invention is therefore the scope and Control options for headboxes, especially for one Tissue machine, improve.

Die Erfindung ist durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gekennzeichnet Zur Einstellung der Höhe des mindestens einen Auslaufspaltes zwischen einem Minimal- und Maximalwert ist eine Exzenterwelle vorgesehen. Durch die Einstellung der Höhe des Auslaufspaltes läßt sich in einfacher Weise die Fließgeschwindigkeit des Suspensionsstromes entsprechend den Erfordernissen an das Endprodukt anpassen. Die Verwendung eines Exzenters gewährleistet eine sehr genaue Einstellung der Auslaufspalthöhe.The invention is characterized by the features of the characterizing part of claim 1 for setting the Height of the at least one outlet gap between a minimum and The maximum value is an eccentric shaft. By hiring the Height of the outlet gap can be easily Flow rate of the suspension stream according to the Adapt requirements to the end product. The use of a Eccentric ensures a very precise adjustment of the Outlet gap height.

Die Oberlippe und die Unterlippe ist jeweils mittels Exzenter um ein Gelenk schwenkbar. Die Einstellung von Ober- und/oder Unterlippe ermöglicht je nach Ausführung als Zwei- oder Mehrschichtstoffauflauf die optimalen Bedingungen zur Regulierung der Fließgeschwindigkeit der einzelnen Schichten.The upper lip and the lower lip can each be pivoted about a joint by means of an eccentric. The setting of upper and / or Depending on the version, the lower lip enables two or two Multilayer headbox the optimal conditions for regulating the Flow speed of the individual layers.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die Exzenterwelle über die Maschinenbreite mehrfach abgestützt ist, wobei die Abstützung in gleichmäßigen Abständen erfolgen kann.An advantageous embodiment of the invention is characterized in that that the eccentric shaft is supported several times over the machine width, the support can take place at regular intervals.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die Exzenterwelle mit einem Getriebemotor verbunden ist. Damit kann auch während des Betriebes der Papiermaschine die Auslaufhöhe und damit die Fließgeschwindigkeit der Faserstoffsuspension entsprechend eingestellt bzw. geregelt werden. A favorable embodiment of the invention is characterized in that that the eccentric shaft is connected to a geared motor. In order to the outlet height can also be adjusted during the operation of the paper machine and thus the flow rate of the fiber suspension accordingly be adjusted or regulated.

Eine vorteilhafte Weiterbildung der Erfindung für einen Zweischicht- oder Mehrschichtstoffauflauf ist dadurch gekennzeichnet, daß zur Trennung der einzelnen Bereiche eine bzw. mehrere einteilige(n), aus Trennwand und Lamellenspitze gebildete Trennelemente mit keilförmige(n) Lamellenspitze(n) aus Stahl vorgesehen ist bzw. sind. Damit ist es möglich eine stabile Trennung und damit auch konstante Einstellung der Auslaufspalthöhen auch bei unterschiedlichen Zulaufdrücken zu erzielen, so daß zwischen den einzelnen Suspensionsströmen eine Differenzgeschwindigkeit eingestellt werden kann.An advantageous development of the invention for a two-layer or Multilayer headbox is characterized in that for separation of the individual areas one or more one-piece separating elements formed from partition and lamella tip with wedge-shaped (s) Blade tip (s) made of steel is or are. So it is possible stable separation and therefore constant adjustment of the outlet gap heights to achieve even with different inlet pressures that a difference in speed between the individual suspension flows can be adjusted.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß die Lamellenspitze(n) mittels eines Zugankers gegen die Trennwand der Zuführvorrichtung vorgespannt sind. Somit ist eine besonders stabile und dadurch exakte Einstellung der Auslaufspalthöhen möglich. A favorable embodiment of the invention is characterized in that that the slat tip (s) by means of a tie rod against the partition are biased to the feeder. This makes it particularly stable and this enables exact adjustment of the outlet gap heights.

Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 einen Zweischichtstoffauflauf gemäß der Erfindung, Fig. 1a ein Detail aus Fig. 1, Fig. 2 einen Dreischichtstoffauflauf, Fig. 2a ein Detail aus Fig. 2, Fig. 3 einen Schnitt gemäß Linie III-III in Fig. 2 darstellt.The invention will now be described by way of example with reference to the drawings, 1 shows a two-layer headbox according to the invention, FIG. 1a a detail from FIG. 1, FIG. 2 a three-layer headbox, FIG. 2a a detail 2, FIG. 3 shows a section along line III-III in FIG. 2 represents.

Fig. 1 stellt eine Vorrichtung zur Zufuhr von Faserstoffsuspensionen auf eine Entwässerungseinrichtung, insbesondere für eine Tissue-Maschine, in Form eines Zweischichtstoffauflaufes dar. Dabei wird die Suspension gleichzeitig über zwei Kanäle 1 quer zur Maschinenrichtung eingespeist, dann wird die Fließrichtung der Suspension um 90 Grad in Maschinenrichtung umgelenkt. In weiterer Folge wird die Suspension durch zwei Turbulenzerzeugerkammern 2 in die als Düsenräume ausgeführten Auslaufkammern 3, 4 geführt, wobei sie an deren Ende die Vorrichtung verläßt und auf die Entwässerungseinrichtung auftrifft. Die beiden Düsenräume 3, 4 werden durch eine Wand 8 getrennt, die mittels durchgebohrter Schrauben 9 gegen den Tragkörper 10 vorgespannt wird. Am auslaufseitigen Ende der Trennwand 8 befindet sich eine einteilige, keilförmige Lamellenspitze 12 aus Edelstahl, die mittels Zuganker 13 gegen die Trennwand 8 vorgespannt wird. Die Trennwand 8 und die Lamellenspitze 12 bilden im zusammengebauten Zustand ein festes Trennelement zwischen den beiden Düsenräumen 3, 4. Durch seine Vorspannung gegenüber dem Tragkörper 10 wird es möglich unterschiedliche Betriebsdrücke (bis zu 0,5 bar) und dadurch unterschiedliche Fließgeschwindigkeiten der Faserstoffsuspension in beiden Schichten einzusetzen.Fig. 1 sets up a device for supplying fiber suspensions a drainage device, in particular for a tissue machine, in the form of a two-layer headbox. The suspension fed simultaneously via two channels 1 across the machine direction, then the flow direction of the suspension is 90 degrees in Machine direction redirected. Subsequently, the suspension through two turbulence generating chambers 2 into the nozzle spaces run out discharge chambers 3, 4, at the end of which Leaves device and strikes the drainage device. The two nozzle spaces 3, 4 are separated by a wall 8, which means cannulated screws 9 is biased against the support body 10. At the outlet end of the partition 8 there is a one-piece, Wedge-shaped lamellar tip 12 made of stainless steel, which by means of tie rods 13 is biased against the partition 8. The partition 8 and the Lamellar tip 12 form a solid in the assembled state Separating element between the two nozzle spaces 3, 4. By its Biasing against the support body 10, it becomes possible different operating pressures (up to 0.5 bar) and thereby different flow rates of the fiber suspension in to use both layers.

Dazu ist es notwendig die Auslaufspalthöhen a bzw. b der beiden Düsenkammern 3, 4 unterschiedlich einzustellen (siehe Fig. 1a). Dazu werden die Oberlippe 18 bzw. Unterlippe 18' um die Gelenke 14, 14' geschwenkt. This requires the outlet gap heights a and b of the two nozzle chambers 3, 4 to be set differently (see Fig. 1a). To do this the upper lip 18 or lower lip 18 'pivoted about the joints 14, 14'.

Ausgeführt wird diese Schwenkbewegung durch eine Exzenterwelle 16, 16', die über die Maschinenbreite, in regelmäßigen Abständen in Lagern 17, 17' auf die starren Deckplatten 20, 20' der Vorrichtung abgestützt sind. Die Exzentrizität e der Wellen ermöglicht eine Einstellung der Spalthöhen a bzw. b zwischen einem Minimal- und Maximalwert.This pivoting movement is carried out by an eccentric shaft 16, 16 ', across the machine width, at regular intervals in bearings 17, 17 'are supported on the rigid cover plates 20, 20' of the device. The eccentricity e of the shafts enables the gap heights to be adjusted a or b between a minimum and maximum value.

Die Konstruktion ist derart ausgelegt, daß auch bei ständigem Weiterdrehen der Exzenterwelle 16, 16' durch einen Antrieb 22 die Oberlippe 18 und die Unterlippe 18' niemals in Kontakt mit der Lamellenspitze 12 kommen und somit auch keine Beschädigungen auftreten können.The construction is designed so that even with constant turning the eccentric shaft 16, 16 'by a drive 22, the upper lip 18th and the lower lip 18 'never in contact with the blade tip 12 come and thus no damage can occur.

Durch diese Ober- und Unterlippenverstellung über Exzenterwellen 16, 16' ist der Konturwinkel α beim Zweischichtstoffauflauf kleiner als bei herkömmlichen Verstellungen über Getriebemotore. Dies ermöglicht eine beträchtliche Verkürzung der freien Strahllänge f des Stoffstrahls vom Austritt aus dem Stoffauflauf zum Kontakt mit den über Walzen 25, 25' laufenden Siebe oder Filze 24, 24'. Dies führt in weiterer Folge zu einer besseren Stabilität des freien Strahls und damit zu einer Verbesserung der Papierqualität.Through this upper and lower lip adjustment via eccentric shafts 16, 16 ' the contour angle α is smaller in the two-layer headbox than in conventional ones Adjustments via geared motors. This enables considerable Shortening the free jet length f of the material jet from the outlet from the headbox for contact with the rollers 25, 25 ' running sieves or felts 24, 24 '. This subsequently leads to a better stability of the free jet and thus an improvement the paper quality.

Durch die starre Lamellenspitze 12 und der dadurch gegebenen Möglichkeit in den beiden Kammern (Düsenräumen) 3, 4 verschiedene Fließgeschwindigkeiten der Suspension vorzusehen, ergibt sich eine Steigerung der Papierqualität bei der Betriebsart "gleiche Stoffsorten" in beiden Kammern bzw. eine sehr gute Trennung (Abdeckung) der Schichten bei der Betriebsart "verschiedene Stoffsorten" in beiden Kammern im Vergleich zu Einschichtstoffaufläufen bzw. Mehrschichtstoffaufläufen mit flexiblen Trennelementen am Auslauf der Düsenräume, die keine Differenz zwischen den beiden Stoffschichten erlauben.Due to the rigid slat tip 12 and the resulting possibility in the two chambers (nozzle rooms) 3, 4 different flow rates to provide the suspension results in a Increase in paper quality in the "same types of fabric" mode in two chambers or a very good separation (cover) of the Layers in the "different types of fabric" mode in both Chambers compared to single-layer headboxes or multi-layer headboxes with flexible dividers at the outlet of the nozzle areas, that do not allow a difference between the two layers of fabric.

Fig. 1a zeigt ein Detail des Auslaufspaltes in Fig. 1. Es ist hier deutlich die unterschiedliche Größe der Auslaufspalte a (Düsenraum 3) und b (Düsenraum 4) erkennbar. Fig. 1a shows a detail of the outlet gap in Fig. 1. It is clearly the different size of the outlet gaps a (nozzle space 3) and b (Nozzle area 4) recognizable.

Fig. 2 zeigt nun einen Dreischichtstoffauflauf, wobei die Suspension gleichzeitig über drei Kanäle 1 quer zur Maschinenrichtung in die Vorrichtung, dann die Fließrichtung der Suspension um 90 Grad in Maschinenrichtung umgelenkt wird. Die Suspension fließt dann durch drei Turbulenzerzeugungskammern 2 in die Auslaufkammern genannten Düsenräume 3, 4, 5 an deren Ende sie die Vorrichtung verlassen und auf die Entwässerungsmaschine auftreffen. Hier wird sie zwischen zwei Siebe 24, 24', die um zwei Walzen 25, 25' laufen, eingespritzt.Fig. 2 now shows a three-layer headbox, the suspension at the same time into the device via three channels 1 transversely to the machine direction, then the direction of flow of the suspension 90 degrees in the machine direction is redirected. The suspension then flows through three turbulence generating chambers 2 in the nozzle chambers 3, 4, 5 at the end of which they leave the device and on the Dewatering machine. Here it is between two sieves 24, 24 ', which run around two rollers 25, 25', are injected.

Die beiden Düsenräume 4, 5 werden analog zur Ausführung in Fig. 1 durch eine Wand 8 getrennt, an deren Ende sich eine einteilige, keilförmige Lamellenspitze 12 aus Edelstahl befindet. Die Trennwand 8 und die Lamellenspitze 12 bilden in zusammengebautem Zustand ein festes, nicht verstellbares Trennelement zwischen den beiden Düsenräumen 4, 5.The two nozzle spaces 4, 5 become analogous to the embodiment in FIG. 1 separated by a wall 8, at the end of which is a one-piece, wedge-shaped Blade tip 12 made of stainless steel. The partition 8 and in the assembled state, the lamella tip 12 forms a firm, non-adjustable separating element between the two nozzle spaces 4, 5.

Durch seine Vorspannung gegenüber dem Tragkörper 10 wird es ermöglicht, unterschiede bis zu 0,5 bar und dadurch unterschiedliche Fließgeschwindigkeiten der Faserstoffsuspensionen in beiden Schichten zu erzielen.Due to its bias against the support body 10 it is enables differences up to 0.5 bar and therefore different Flow rates of the fiber suspensions in both layers to achieve.

Die beiden Düsenräume 3, 4 werden durch eine Trennwand 6 getrennt, die um eine Achse 7 drehbar gelagert ist. Am auslaufseitigen Ende der Trennwand 6 befindet sich ebenfalls eine einteilige Lamellenspitze 12' aus Edelstahl, die mittels Zuganker 11 gegen die Trennwand 6 vorgespannt wird. Die Trennwand 6 und die Lamellenspitze 12' bilden somit ein starres Trennelement, das jedoch als ganzes um die Drehachse 7 geschwenkt werden kann. Ausgeführt wird diese Schwenkbewegung durch eine Exzenterwelle 15, die über die Maschinenbreite in regelmäßigen Abständen in Lagern 19 auf die starre Hinterwand 23 der Vorrichtung abgestützt sind.The two nozzle spaces 3, 4 are separated by a partition 6, which is rotatably mounted about an axis 7. At the outlet end of the Partition 6 is also a one-piece lamella tip 12 ' Stainless steel, which is prestressed against the partition 6 by means of tie rods 11 becomes. The partition 6 and the lamella tip 12 'thus form a rigid one Separating element which, however, is pivoted as a whole about the axis of rotation 7 can be. This swivel movement is carried out by a Eccentric shaft 15 that is regular across the machine width Distances in bearings 19 supported on the rigid rear wall 23 of the device are.

Die Exzentrizität e ermöglicht eine Einstellung der Auslaufspalthöhe c des Düsenraumes 4 zwischen einem Minimal- und Maximalwert und eine Fixierung derselben. Die Auslaufspalthöhen a und b der beiden Düsenkammern 3 und 5 können ebenfalls zwischen einem Minimal- und Maximalwert eingestellt und fixiert werden. Dazu werden die Oberlippe 18 bzw. Unterlippe 18' um die Gelenke 14, 14' geschwenkt. Ausgeführt wird diese Schwenkbewegung durch eine Exzenterwelle 1, 16', die über die Maschinenbreite in regelmäßigen Abständen in Lagern 17, 17' auf die starren Deckplatten 20, 20' der Vorrichtung abgestützt sind. Die Exzentrizität e der Wellen 16, 16' ermöglicht eine Einstellung der Spalthöhen a und b zwischen einem Minimal- und Maximalwert.The eccentricity e makes it possible to set the outlet gap height c des Nozzle space 4 between a minimum and maximum value and one Fixation of the same. The outlet gap heights a and b of the two nozzle chambers 3 and 5 can also be between a minimum and Maximum value can be set and fixed. For this, the upper lip 18 or lower lip 18 'pivoted about the joints 14, 14'. Is performed this pivoting movement by an eccentric shaft 1, 16 ', which on the Machine width at regular intervals in bearings 17, 17 'on the rigid cover plates 20, 20 'of the device are supported. The eccentricity e of the shafts 16, 16 'enables the gap heights a to be adjusted and b between a minimum and maximum value.

Die Konstruktion ist derart ausgelegt, daß auch bei ständigem Weiterdrehen der Exzenterwellen 16, 16' durch einen Antrieb 22 die Oberlippe 18 und die Unterlippe 18' niemals in Kontakt mit den Lamellenspitzen 12, 12' kommen und somit auch keine Beschädigungen auftreten können. Dies gilt auch für alle Positionen der beweglichen Trennwand 6 mit Lamellenspitze 12'.The construction is designed so that even with constant turning the eccentric shafts 16, 16 'through a drive 22 the upper lip 18 and the lower lip 18 'never in contact with the lamella tips 12, 12 'come and thus no damage can occur. This also applies to all positions of the movable partition 6 Blade tip 12 '.

Durch diese Ober- und Unterlippenverstellung über Exzenterwellen 16, 16' ist der Konturwinkel β beim Dreischichtstoffauflauf kleiner als bei herkömmlichen Verstellungen über Getriebemotore. Dies ermöglicht ebenfalls eine beträchtliche Verkürzung der freien Strahllänge f des Stoffstrahls vom Austritt aus dem Stoffauflauf zum Kontakt mit den über Walzen 25, 25' laufenden Siebe oder Filze 24, 24'. Dies führt in weiterer Folge zu einer besseren Stabilität des freien Strahls und damit zu einer Verbesserung der Papierqualität.Through this upper and lower lip adjustment via eccentric shafts 16, 16 ' the contour angle β in the three-layer headbox is smaller than in conventional ones Adjustments via geared motors. This also enables a considerable reduction in the free jet length f of the material jet from the exit from the headbox to the contact with the rollers 25, 25 'running screens or felts 24, 24'. This subsequently leads to a better stability of the free jet and thus an improvement the paper quality.

Somit ist es ebenfalls möglich, den Dreischichtstoffauflauf mit unterschiedlichen Fließgeschwindigkeiten in der Innen- bzw. in den beiden Außenlagen zu betreiben.It is therefore also possible to use different three-layer headboxes Flow velocities in the interior or in the two To operate outside locations.

Zu den bereits genannten Vorteilen beim Zweischichtstoffauflauf wie Papierqualität, Abdeckung und Lagentrennung kommt beim Dreischichtstoffauflauf noch hinzu, daß in der Mittelschicht Stoffarten minderer Qualität eingesetzt werden können, ohne daß die Papierqualität beeinträchtigt wird.Regarding the advantages already mentioned with the two-layer headbox such as Paper quality, coverage and layer separation come with the three-layer headbox in addition, that in the middle class less species Quality can be used without affecting the paper quality becomes.

Fig. 2a zeigt ein Detail des Auslaufspaltes in Fig. 2. Man sieht die unterschiedlichen Einstellungen der Auslaufspalthöhen a (Düsenraum 3), b (Düsenraum 5) und c (Düsenraum 4).Fig. 2a shows a detail of the outlet gap in Fig. 2. You can see the different settings of the outlet gap heights a (nozzle area 3), b (nozzle area 5) and c (nozzle area 4).

Fig. 3 zeigt einen Schnitt gemäß Linie III-III in Fig. 1 und analog in Fig. 2. Hier ist die Exzenterwelle 16 dargestellt, die mehrfach über die Maschinenbreite in Lagern 17 abgestützt wird. Auch ist ein Getriebemotor 22 gezeigt, mit dem die Spalthöhe des Auslaufspaltes eingestellt werden kann.FIG. 3 shows a section along line III-III in FIG. 1 and analogously in FIG. 2. Here, the eccentric shaft 16 is shown, the multiple over the Machine width is supported in bearings 17. There is also a gear motor 22 shown, with which the gap height of the outlet gap can be adjusted can.

Die Erfindung ist nicht auf die dargestellten Beispiele beschränkt. Es können z.B. auch andere Arten der Ausführung der Mittellamelle vorgesehen sein.The invention is not restricted to the examples shown. It can e.g. other types of execution of the middle slat be provided.

Claims (5)

  1. Device for feeding a pulp suspension to a dewatering installation, particularly for a tissue machine, where at least one channel (1) is provided for feeding the pulp suspension which leads via at least one turbulence generation area (2) into an appertaining nozzle area (3, 4) which is limited by a top lip (18) and a bottom lip (18') and divided by at least one dividing element formed by a partition (8) and a lamella tip (12) so that at least one slice gap is formed between the top lip (18) and/or the bottom lip (18') and the dividing element, characterised by an eccentric shaft (15, 16, 16') being provided to adjust the height (a, b) of the at least one slice gap between a minimum and a maximum value, where the top lip (18) can be pivoted by means of the eccentric shaft (16) around a hinge (14) and the bottom lip (18') by means of the eccentric shaft (16') around a hinge (14').
  2. Device according to Claim 1, characterised by the eccentric shaft (15, 16, 16') being supported at several points over the machine width.
  3. Device according to Claim 2, characterised by the eccentric shaft (15, 16, 16') being supported at regular intervals.
  4. Device according to one of Claims 1 to 3, characterised by the eccentric shaft (15, 16, 16') being connected to a gear motor (22).
  5. Device according to one of Claims 1 to 4, characterised by one or several dividing element(s) consisting of a partition (6, 8) and a lamella tip (12, 12'), with one-piece, wedge-shaped, steel lamella tip(s) (12, 12') being provided for a two-layer or multi-layer headbox to separate the individual sections, and with the lamella tips (12, 12') being attached under pre-stress by a tie rod (11, 13) to the partition (6, 8) of the feed device and at least one dividing element being adjustable by means of the eccentric shaft (15).
EP98124785A 1998-02-05 1998-12-29 Apparatus for feeding a fibre suspension on a dewatering device Expired - Lifetime EP0936302B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0020798A AT406172B (en) 1998-02-05 1998-02-05 DEVICE FOR SUPPLYING A FIBER FIBER SUSPENSION TO A DRAINAGE DEVICE
AT20798 1998-02-05

Publications (3)

Publication Number Publication Date
EP0936302A2 EP0936302A2 (en) 1999-08-18
EP0936302A3 EP0936302A3 (en) 2000-02-23
EP0936302B1 true EP0936302B1 (en) 2004-04-21

Family

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Application Number Title Priority Date Filing Date
EP98124785A Expired - Lifetime EP0936302B1 (en) 1998-02-05 1998-12-29 Apparatus for feeding a fibre suspension on a dewatering device

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US (2) US6319366B1 (en)
EP (1) EP0936302B1 (en)
AT (1) AT406172B (en)
BR (1) BR9900536B1 (en)
DE (1) DE59811238D1 (en)
ES (1) ES2218752T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106684A1 (en) * 2001-02-14 2002-08-29 Voith Paper Patent Gmbh Slat of a headbox of a paper, cardboard or tissue machine
DE10159412A1 (en) * 2001-12-04 2003-06-12 Voith Paper Patent Gmbh headbox
DE102008000175A1 (en) * 2008-01-30 2009-08-06 Voith Patent Gmbh Multi-layer headbox for a machine for producing a multilayer fibrous web
DE102008043145A1 (en) * 2008-10-24 2010-04-29 Voith Patent Gmbh Two-layer casserole for a machine for producing a two-layer fibrous web
EP2199459A1 (en) * 2008-12-16 2010-06-23 Voith Patent GmbH Sheet composition system for a machine for producing a multiple layer sheet of fibrous material

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005839A (en) * 1933-01-26 1935-06-25 Downingtown Mfg Co Cylinder machine
US2615374A (en) * 1948-10-04 1952-10-28 Dominion Eng Works Ltd Slice assembly for papermaking machines
US3556935A (en) * 1968-04-03 1971-01-19 Procter & Gamble Papermaking headbox with adjustable hydraulic nozzle and slice
CH564639A5 (en) * 1973-04-17 1975-07-31 Escher Wyss Gmbh
FI772145A (en) * 1976-12-02 1978-06-03 Ahlstroem Dev Gmbh ANORDNING FOER BEHANDLING AV BANFORMIGT GODS
DE3010730C2 (en) * 1980-03-20 1983-01-05 J.M. Voith Gmbh, 7920 Heidenheim Headbox for a paper machine
AT377026B (en) * 1980-12-19 1985-01-25 Escher Wyss Gmbh FABRIC DRIVE FOR A PAPER MACHINE
FI78750B (en) * 1982-07-20 1989-05-31 Escher Wyss Gmbh FLERSKIKTSINLOPPSLAODA FOER MATANDE AV PAPPERSMASSA TILL EN VIRA.
DE3321406A1 (en) * 1983-06-09 1984-12-13 Escher Wyss Gmbh, 7980 Ravensburg FABRIC DRIVE FOR A PAPER MACHINE
DE3535849A1 (en) * 1985-10-08 1987-04-09 Voith Gmbh J M Setting device for the lip of a papermachine hatbox
CH672515A5 (en) * 1987-02-02 1989-11-30 Escher Wyss Gmbh
US4892623A (en) * 1989-02-17 1990-01-09 Process Automation Business, Inc. Two-speed stepper actuator
US4975151A (en) * 1989-02-17 1990-12-04 Process Automation Business Inc. Two-speed single lever stepper actuator
FI92230C (en) * 1993-07-01 1994-10-10 Valmet Paper Machinery Inc Method of controlling a multilayer inlet and multilayer inlet
DE4440079C2 (en) * 1994-11-10 1997-10-02 Voith Sulzer Papiermasch Gmbh Multi-layer headbox
US5578172A (en) * 1994-12-20 1996-11-26 Voith Sulzer Papiermaschinen Gmbh Slice beam support plate
DE19624052A1 (en) * 1996-06-17 1996-12-12 Voith Sulzer Papiermasch Gmbh Triple level papermaking stock inlet allowing wide range of adjustments
DE19652982A1 (en) * 1996-12-19 1997-05-22 Voith Sulzer Papiermasch Gmbh Separator blade flush-fit connector in paper pulp multilayer head box
DE19652983A1 (en) * 1996-12-19 1997-05-28 Voith Sulzer Papiermasch Gmbh Separating element for paper machine breast box

Also Published As

Publication number Publication date
EP0936302A3 (en) 2000-02-23
US6319366B1 (en) 2001-11-20
US6475345B2 (en) 2002-11-05
BR9900536B1 (en) 2009-05-05
BR9900536A (en) 2000-04-18
AT406172B (en) 2000-03-27
EP0936302A2 (en) 1999-08-18
DE59811238D1 (en) 2004-05-27
ES2218752T3 (en) 2004-11-16
US20020060038A1 (en) 2002-05-23
ATA20798A (en) 1999-07-15

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