EP0256972A2 - Refiner for the treatment of fibrous material - Google Patents

Refiner for the treatment of fibrous material Download PDF

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Publication number
EP0256972A2
EP0256972A2 EP87730093A EP87730093A EP0256972A2 EP 0256972 A2 EP0256972 A2 EP 0256972A2 EP 87730093 A EP87730093 A EP 87730093A EP 87730093 A EP87730093 A EP 87730093A EP 0256972 A2 EP0256972 A2 EP 0256972A2
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EP
European Patent Office
Prior art keywords
grinding
sectors
refiner
knives
area
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Granted
Application number
EP87730093A
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German (de)
French (fr)
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EP0256972A3 (en
EP0256972B1 (en
Inventor
Siegfried Dipl.-Ing. Kleinhans
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Siemens AG
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Siemens AG
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Priority to AT87730093T priority Critical patent/ATE59313T1/en
Publication of EP0256972A2 publication Critical patent/EP0256972A2/en
Publication of EP0256972A3 publication Critical patent/EP0256972A3/en
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Publication of EP0256972B1 publication Critical patent/EP0256972B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00Crushing or disintegrating by disc mills
    • B02C7/11Details
    • B02C7/12Shape or construction of discs
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20Methods of refining
    • D21D1/30Disc mills
    • D21D1/306Discs

Definitions

  • the invention relates to a refiner for processing fiber material, consisting of two opposing grinding disks driven by an electric motor, the facing end faces of which have processing devices with groups of material grinding barriers or knives running parallel to one another along the circumference of the grinding disks and knives and intermediate flow channels .
  • Such refiners are e.g. B. from DE-OS 25 22 349 and DE-OS 27 24 161 known.
  • the refiners are used to shred raw material, e.g. B. wood chips, with the help of rotating processing devices, which are arranged on the opposite end faces of grinding disks.
  • These grinding disks are driven by electric motors, either by rotating only one grinding disk and moving against a fixed disk, or two grinding disks rotating in opposite directions are driven against each other, each of which is driven by its own electric motor.
  • the material to be shredded is fed into the space between the two grinding disks, passes through it generally radially from the inside to the outside and leaves the refiner as a pulp.
  • the processing devices of the known grinding disks with the groups of material grinding barriers or knife groups running parallel to one another and flow channels lying between them are arranged interchangeably on sectors of the grinding disk. These sectors are the same size as each other.
  • Knives have a uniform geometric arrangement in the groups, generally having an angle with respect to the radius.
  • the geometric arrangement of the processing equipment depends on the raw material to be processed.
  • a division of the sectors into two or more radially successive ring sectors with a different arrangement of the material grinding barriers or knives is also known.
  • the refiner and the driving electric motor are provided with their own bearings and are connected to each other via large, but flexible, torsionally rigid couplings.
  • the refiner's grinding disks and the drive motor rotor are arranged on a common shaft.
  • the operation of the refiner subjects the driving electric motor to great loads, which can lead to vibration problems and, as a result, damage. It is therefore customary to oversize the components of the refiner and in particular the fastening parts of the rotor of the drive motors in order to avoid damage.
  • the invention has for its object to reduce the outlay given by such oversizing, without increasing the susceptibility to damage in refiner arrangements with driving electric motors.
  • a refiner of the type described at the outset is designed in accordance with the invention in such a way that the sectors with the material grinding barrier or knife groups have an uneven division or different central angles along the circumference of the grinding disk.
  • each grinding disc is advantageously divided into at least two identical or almost identical areas with the same number of sectors, and in each area the central angles of the successive sectors give way strongly differ from one another and are repetitively different from area to area.
  • the influencing of the stimulating moments is independent of the geometrical arrangement of the processing devices in the sectors.
  • Each sector can also be divided into two or more radially consecutive ring sectors with a different arrangement of the material grinding barriers or knives.
  • Figure 1 shows schematically a longitudinal section through a refiner.
  • Figure 2 is a view of the End face of a grinding wheel of such a refiner shown.
  • FIG. 1 of the drawing shows the basic structure of a refiner with two grinding disks 1 rotating against one another, which lie on the rotor shaft 2 ⁇ , 2 jeweils of an electric motor 3, which is used for driving each, of a synchronous or asynchronous type, of which only the rotor is shown.
  • Each rotor shaft 2 is mounted in two plain bearings 4 so that a certain axial displacement of the rotor shafts 2 ⁇ , 2 ⁇ is possible. This is necessary because the processing devices 6 arranged on the mutually facing end faces 5 of the grinding disks 1 wear during the operation of the refiner and therefore have to be replaced in certain time periods.
  • the raw material 7 to be processed by the refiner e.g. B. wood chips
  • the space between the two grinding disks 1 is fed radially inwards by means of a feed tube 8.
  • a counter bearing 10 indicated only schematically as a surface, is provided for the shaft end 9 of the rotor shaft 2 ⁇ facing away from the grinding disk 1 while on the corresponding shaft end 11 of the rotor shaft 2 ⁇ acts on an only indicated hydraulic adjusting device 12, by means of which the desired operating conditions are produced.
  • FIG. 2 shows a view of the end face 5 of a grinding disk 1 which is designed in accordance with the invention.
  • the processing devices 6 each lie on sectors 13, which are exchangeably fastened in a suitable manner, not shown, on the end face 5 of the grinding disk 1.
  • the successive along the circumference of the grinding disc 1, which has a central opening 14 Sectors 13 have an uneven pitch t or differently sized central angles ⁇ , so that the sectors 13 are each of different sizes.
  • the grinding wheel 1 is provided with a total of sixteen sectors 13, one has chosen a sequence of sixteen different divisions t 1 to t 1, the sum of which gives a circular disc and of which the division t 1 is the largest and t 1 is the smallest. Correspondingly, one also has sixteen different central angles ⁇ , which give a total of 360 °.
  • the grinding disc 1 has been divided into four almost identical areas 15, which are delimited by broken lines in FIG. Four sectors 13 are accommodated in each of these areas.
  • four divisions are selected from the sequence of the different divisions for each area, which if possible do not follow one another as directly as possible in the size-ordered sequence of the divisions and which each add up correspond to the division of each area 15.
  • Each sector 13 carries the processing device 6 consisting of knives 16 arranged parallel to one another. These knives 16 are geometrically arranged and in their angle with respect to the radius selected so that they best correspond to the required processing of the raw material 7.

Abstract

Die Mahlscheiben (1) eines von einem Elektromotor angetriebenen Refiners tragen auf den einander zugewandten Stirnflächen (5) in Sektoren gruppenweise angeordnete, parallel zueinander verlaufende Stoffmahlbarrieren bzw. Messer (16). Um die während des Betriebes des Refiners auftretende Momentenanregung der Läuferwelle des Elektromotors möglichst herabzusetzen, weisen die Sektoren (13) längs des Umfanges der Mahlscheiben (1) eine ungleichmäßige Teilung (t) bzw. unterschiedliche Zentriwinkel (ß) auf.The grinding disks (1) of a refiner driven by an electric motor carry fabric grinding barriers or knives (16) arranged in groups and parallel to one another on the facing end faces (5). In order to reduce the torque excitation of the rotor shaft of the electric motor that occurs during operation of the refiner, the sectors (13) have an uneven pitch (t) or different central angles (ß) along the circumference of the grinding disks (1).

Description

Die Erfindung bezieht sich auf einen Refiner zur Bearbeitung von Fasermaterial, bestehend aus zwei gegenüberstehenden, von einem Elektromotor angetriebenen Mahlscheiben, deren einander zugewandte Stirnflächen Bearbeitungseinrichtungen mit längs des Umfangs der Mahlscheiben in Sektoren gruppen­weise angeordneten, parallel zueinander verlaufenden Stoff­mahlbarrieren bzw. Messern und dazwischenliegenden Strömungs­kanälen aufweisen.The invention relates to a refiner for processing fiber material, consisting of two opposing grinding disks driven by an electric motor, the facing end faces of which have processing devices with groups of material grinding barriers or knives running parallel to one another along the circumference of the grinding disks and knives and intermediate flow channels .

Derartige Refiner sind z. B. aus der DE-OS 25 22 349 und DE-OS 27 24 161 bekannt. Die Refiner dienen zur Zerkleine­rung von Rohgut, z. B. Holzchips, mit Hilfe von rotierenden Bearbeitungseinrichtungen, die auf den einander gegenüber­stehenden Stirnseiten von Mahlscheiben angeordnet sind. Diese Mahlscheiben werden von Elektromotoren angetrieben, indem entweder nur eine Mahlscheibe rotiert und gegen eine feststehende Scheibe angefahren wird, oder es werden zwei mit entgegengesetztem Drehsinn rotierende Mahlscheiben gegen­einander gefahren, die jeweils von einem eigenen Elektromo­tor angetrieben werden. Das zu zerkleinernde Gut wird dem Raum zwischen beiden Mahlscheiben zugeführt, durchläuft diesen im allgemein radial von innen nach außen und verläßt als Brei den Refiner.Such refiners are e.g. B. from DE-OS 25 22 349 and DE-OS 27 24 161 known. The refiners are used to shred raw material, e.g. B. wood chips, with the help of rotating processing devices, which are arranged on the opposite end faces of grinding disks. These grinding disks are driven by electric motors, either by rotating only one grinding disk and moving against a fixed disk, or two grinding disks rotating in opposite directions are driven against each other, each of which is driven by its own electric motor. The material to be shredded is fed into the space between the two grinding disks, passes through it generally radially from the inside to the outside and leaves the refiner as a pulp.

Die Bearbeitungseinrichtungen der bekannten Mahlscheiben mit den aus parallel zueinander verlaufenden Stoffmahlbarrieren- ­bzw. Messergruppen und dazwischen liegenden Strömungs­kanälen, sind auswechselbar auf Sektoren der Mahlscheibe angeordnet. Diese Sektoren sind untereinander gleich groß. Die von ihnen getragenen Stoffmahlbarrieren bzw.The processing devices of the known grinding disks with the groups of material grinding barriers or knife groups running parallel to one another and flow channels lying between them are arranged interchangeably on sectors of the grinding disk. These sectors are the same size as each other. The fabric grinding barriers they carry or

Messer haben eine einheitliche geometrische Anordnung in den Gruppen, wobei sie im allgemeinen einen Winkel gegenüber dem Radius aufweisen. Die geometrische Anordnung der Bearbeitungs­einrichtungen richtet sich nach dem zu verarbeitenden Rohgut. Auch eine Unterteilung der Sektoren in zwei oder mehrere, radial aufeinanderfolgende Ringsektoren mit unterschied­licher Anordnung der Stoffmahlbarrieren oder Messer ist bekannt.Knives have a uniform geometric arrangement in the groups, generally having an angle with respect to the radius. The geometric arrangement of the processing equipment depends on the raw material to be processed. A division of the sectors into two or more radially successive ring sectors with a different arrangement of the material grinding barriers or knives is also known.

Je nach der Leistung des Refiners sind dieser und der an­treibende Elektromotor mit eigenen Lagern versehen und bei großen Leistungen über zwar flexible, aber drehstarre Kupplungen miteinander verbunden. Bei kleineren Leistungen sind die Mahlscheiben des Refiners und der Läufer des Antriebsmotors auf einer gemeinsamen Welle angeordnet. Der Betrieb des Refiners unterwirft den antreibenden Elektro­motor großen Belastungen, die Schwingungsprobleme und daraus resultierend auch Schäden zur Folge haben können. Es ist daher üblich, die Bauteile des Refiners und insbesondere die Befestigungsteile auch der Läufer der Antriebsmotoren überzudimensionieren, um Beschädigungen zu vermeiden.Depending on the performance of the refiner, the refiner and the driving electric motor are provided with their own bearings and are connected to each other via large, but flexible, torsionally rigid couplings. For smaller outputs, the refiner's grinding disks and the drive motor rotor are arranged on a common shaft. The operation of the refiner subjects the driving electric motor to great loads, which can lead to vibration problems and, as a result, damage. It is therefore customary to oversize the components of the refiner and in particular the fastening parts of the rotor of the drive motors in order to avoid damage.

Der Erfindung liegt die Aufgabe zugrunde, den durch eine derartige Überdimensionierung gegebenen Aufwand zu verringern, ohne daß die Schadensanfälligkeit bei Refiner­anordnungen mit antreibenden Elektromotoren erhöht wird.The invention has for its object to reduce the outlay given by such oversizing, without increasing the susceptibility to damage in refiner arrangements with driving electric motors.

Zur Lösung dieser Aufgabe ist ein Refiner der eingangs beschriebenen Art gemäß der Erfindung so ausgebildet, daß die Sektoren mit den Stoffmahlbarrieren- bzw. Messergruppen längs des Umfanges der Mahlscheibe eine ungleichmäßige Teilung bzw. unterschiedliche Zentriwinkel aufweisen.To solve this problem, a refiner of the type described at the outset is designed in accordance with the invention in such a way that the sectors with the material grinding barrier or knife groups have an uneven division or different central angles along the circumference of the grinding disk.

Durch diese ungleichmäßige Teilung der Sektoren mit den Bearbeitungseinrichtungen der Mahlscheibe, deren geo­metrische Anordnung von dem zu verarbeitenden Mahlgut abhängig ist, werden die durch die Bearbeitungseinrichtungen angeregten Frequenzen für das Drehschwingungssystem des Refiners, nämlich das Drehschwingungssystem Mahlscheibe/­Antriebsmotor, beeinflußt. Die sich aus dem Mahlprozeß ergebenden Momentenanregungen wirken nämlich jetzt auf Sektoren unterschiedlicher Größe, die entsprechend jeweils eine unterschiedliche Anzahl von Stoffmahlbarrieren bzw. Messern haben. Dadurch werden die Anregungen für Drehschwin­gungen verringert. Außerdem kann durch die Verteilung der unterschiedlich großen Sektoren auch die angeregte Frequenz beeinflußt werden, so daß sie in Bereiche außerhalb der Torsionseigenfrequenz des Systems gelegt werden kann. Dadurch vermindert sich die Gefahr, daß Resonanzen auftreten können.Due to this uneven division of the sectors with the processing devices of the grinding wheel, their geometric arrangement of the regrind to be processed is dependent, the frequencies excited by the processing devices for the torsional vibration system of the refiner, namely the torsional vibration system grinding disc / drive motor, are influenced. The torque stimulations resulting from the grinding process now act on sectors of different sizes, each of which has a different number of fabric grinding barriers or knives. This reduces the excitation for torsional vibrations. In addition, the distribution of the sectors of different sizes can also influence the excited frequency, so that it can be placed in areas outside the natural torsional frequency of the system. This reduces the risk of resonances occurring.

Um weiterhin eine möglichst gute statistische Verteilung der unterschiedlichen Größen der Sektoren und dadurch optimal kleine Anregungen zu erhalten, ist mit Vorteil jede Mahl­scheibe in mindestens zwei gleiche oder nahezu gleiche Bereiche mit gleicher Anzahl von Sektoren unterteilt, und in jedem Bereich weichen die Zentriwinkel der aufeinander­folgenden Sektoren voneinander stark ab und sind von Bereich zu Bereich unwiederholt anders.In order to continue to obtain the best possible statistical distribution of the different sizes of the sectors and thereby optimally small suggestions, each grinding disc is advantageously divided into at least two identical or almost identical areas with the same number of sectors, and in each area the central angles of the successive sectors give way strongly differ from one another and are repetitively different from area to area.

Die Beeinflussung der anregenden Momente ist unabhängig davon, welche geometrische Anordnung die Bearbeitungs­einrichtungen in den Sektoren haben. Jeder Sektor kann auch in zwei oder mehrere radial aufeinanderfolgende Ringsektoren mit unterschiedlicher Anordnung der Stoffmahlbarrieren bzw. Messer unterteilt sein.The influencing of the stimulating moments is independent of the geometrical arrangement of the processing devices in the sectors. Each sector can also be divided into two or more radially consecutive ring sectors with a different arrangement of the material grinding barriers or knives.

Im folgenden sei die Erfindung anhand des in den Figuren 1 und 2 der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Die Figur 1 zeigt schematisch einen Längsschnitt durch einen Refiner. In Figur 2 ist eine Ansicht der Stirnfläche einer Mahlscheibe eines derartigen Refiners dargestellt.The invention is explained in more detail below with reference to the exemplary embodiment shown in FIGS. 1 and 2 of the drawing. Figure 1 shows schematically a longitudinal section through a refiner. In Figure 2 is a view of the End face of a grinding wheel of such a refiner shown.

Die Figur 1 der Zeichnung zeigt den prinzipiellen Aufbau eines Refiners mit zwei gegeneinander rotierenden Mahlschei­ben 1, die auf der Läuferwelle 2ʹ, 2ʹʹ eines jeweils zum An­trieb dienenden Elektromotors 3 synchroner oder asychroner Bauart liegen, von dem nur der Läufer dargestellt ist. Jede Läuferwelle 2 ist in zwei Gleitlagern 4 so gelagert, daß eine gewisse axiale Verschiebbarkeit der Läuferwellen 2ʹ, 2ʹʹ möglich ist. Dies ist erforderlich, da sich die auf den einander zugewandten Stirnflächen 5 der Mahlscheiben 1 angeordneten Bearbeitungseinrichtungen 6 während des Betriebes des Refiners abnutzen und deshalb in bestimmten Zeiträumen ausgewechselt werden müssen.FIG. 1 of the drawing shows the basic structure of a refiner with two grinding disks 1 rotating against one another, which lie on the rotor shaft 2ʹ, 2 jeweils of an electric motor 3, which is used for driving each, of a synchronous or asynchronous type, of which only the rotor is shown. Each rotor shaft 2 is mounted in two plain bearings 4 so that a certain axial displacement of the rotor shafts 2ʹ, 2ʹʹ is possible. This is necessary because the processing devices 6 arranged on the mutually facing end faces 5 of the grinding disks 1 wear during the operation of the refiner and therefore have to be replaced in certain time periods.

Das von dem Refiner zu verarbeitende Rohgut 7, z. B. Holz­chips, wird dem Raum zwischen beiden Mahlscheiben 1 mittels eines Zuführungsrohrs 8 radial nach innen zugeleitet. Damit während der Bearbeitung des Rohguts 7 zwischen den im Gegen­sinn rotierenden Mahlscheiben 1 der gewünschte Bearbeitungs­abstand und der gewünschte axiale Druck ausgeübt werden können, ist für das der Mahlscheibe 1 abgewandte Wellenende 9 der Läuferwelle 2ʹ ein nur schematisch als Fläche angedeu­tetes Gegenlager 10 vorgesehen, während auf das entsprechen­de Wellenende 11 der Läuferwelle 2ʹʹ eine nur angedeutete hydraulische Anstellvorrichtung 12 einwirkt, durch welche die gewünschten Betriebsbedingungen hergestellt werden.The raw material 7 to be processed by the refiner, e.g. B. wood chips, the space between the two grinding disks 1 is fed radially inwards by means of a feed tube 8. So that the desired machining distance and the desired axial pressure can be exerted during the processing of the raw material 7 between the grinding disks 1 rotating in the opposite direction, a counter bearing 10, indicated only schematically as a surface, is provided for the shaft end 9 of the rotor shaft 2ʹ facing away from the grinding disk 1 while on the corresponding shaft end 11 of the rotor shaft 2ʹʹ acts on an only indicated hydraulic adjusting device 12, by means of which the desired operating conditions are produced.

In der Figur 2 ist eine Ansicht der Stirnseite 5 einer Mahlscheibe 1 dargestellt, die gemäß der Erfindung ausge­bildet ist. Die Bearbeitungseinrichtungen 6 liegen jeweils auf Sektoren 13, die auswechselbar in geeigneter, nicht dargestellter Weise auf der Stirnfläche 5 der Mahlscheibe 1 befestigt sind. Die längs des Umfangs der Mahlscheibe 1, die eine Mittelöffnung 14 aufweist, aufeinanderfolgenden Sektoren 13 haben eine ungleichmäßige Teilung t bzw. unter­schiedlich große Zentriwinkel ß, so daß also die Sektoren 13 jeweils unterschiedlich groß sind.FIG. 2 shows a view of the end face 5 of a grinding disk 1 which is designed in accordance with the invention. The processing devices 6 each lie on sectors 13, which are exchangeably fastened in a suitable manner, not shown, on the end face 5 of the grinding disk 1. The successive along the circumference of the grinding disc 1, which has a central opening 14 Sectors 13 have an uneven pitch t or differently sized central angles β, so that the sectors 13 are each of different sizes.

Da die Mahlscheibe 1 mit insgesamt sechzehn Sektoren 13 ver­sehen ist, hat man eine Folge von sechzehn unterschiedlichen Teilungen t₁ bis t₁₆ gewählt, deren Summe eine Kreisscheibe ergibt und von denen die Teilung t₁₆ die größte und t₁ die kleinste ist. Entsprechend hat man ebenfalls sechzehn unter­schiedliche Zentriwinkel ß, die insgesamt eine Summe von 360° ergeben.Since the grinding wheel 1 is provided with a total of sixteen sectors 13, one has chosen a sequence of sixteen different divisions t 1 to t 1, the sum of which gives a circular disc and of which the division t 1 is the largest and t 1 is the smallest. Correspondingly, one also has sixteen different central angles β, which give a total of 360 °.

Außerdem ist eine ungleichmäßige Verteilung der unterschied­lich großen Sektoren 13 auf der Mahlscheibe 1 erwünscht. Um dies zu erreichen, hat man die Mahlscheibe 1 in vier nahezu gleiche Bereiche 15 unterteilt, die in der Figur 2 durch gestrichelte Linien begrenzt sind. In jedem dieser Bereiche sind vier Sektoren 13 untergebracht. Dazu werden aus der Folge der unterschiedlichen Teilungen für jeden Bereich vier Teilungen herausgegriffen, die in der nach der Größe geord­neten Folge der Teilungen möglichst nicht unmittelbar auf­einanderfolgen und die jeweils addiert der Teilung jedes Bereiches 15 entsprechen. Diese vier Teilungen t jedes Bereiches 15 werden dann noch untereinander permutiert, so daß die Reihenfolge der Zahlenwerte der Teilungen t längs des Umfanges der Mahlscheibe 1 möglichst weit von der Reihenfolge der der Größe nach geordneten Teilungen t abweicht und von Bereich 15 zu Bereich 15 unwiederholt anders ist. Man erhält dadurch eine Verteilung der unter­schiedlich großen Sektoren 13, die eine möglichst kleine Momentenanregung ergibt.In addition, an uneven distribution of the different sized sectors 13 on the grinding disc 1 is desired. In order to achieve this, the grinding disc 1 has been divided into four almost identical areas 15, which are delimited by broken lines in FIG. Four sectors 13 are accommodated in each of these areas. For this purpose, four divisions are selected from the sequence of the different divisions for each area, which if possible do not follow one another as directly as possible in the size-ordered sequence of the divisions and which each add up correspond to the division of each area 15. These four divisions t of each area 15 are then permuted among themselves, so that the order of the numerical values of the divisions t along the circumference of the grinding disk 1 deviates as far as possible from the order of the graduations t ordered in size and from area 15 to area 15 is repeatedly different is. This gives a distribution of the differently sized sectors 13, which results in the smallest possible torque excitation.

Jeder Sektor 13 trägt die aus parallel zueinander angeordne­ten Messern 16 bestehende Bearbeitungseinrichtung 6. Diese Messer 16 sind in ihrer geometrischen Anordnung und in ihrem Winkel gegenüber dem Radius so ausgewählt, daß sie der geforderten Bearbeitung des Rohguts 7 am besten entsprechen.Each sector 13 carries the processing device 6 consisting of knives 16 arranged parallel to one another. These knives 16 are geometrically arranged and in their angle with respect to the radius selected so that they best correspond to the required processing of the raw material 7.

Claims (3)

1. Refiner zur Bearbeitung von Fasermaterial, bestehend aus zwei gegenüberstehenden, von einem Elektromotor (3) angetrie­benen Mahlscheiben (1), deren einander zugewandten Stirn­flächen (5) Bearbeitungseinrichtungen (6) mit längs des Umfangs der Mahlscheiben (1) in Sektoren (13) gruppenweise angeordneten, parallel zueinander verlaufenden Stoffmahlbar­rieren bzw. Messern und dazwischenliegenden Strömungskanälen aufweisen, dadurch gekennzeichnet, daß die Sektoren (13) mit den Stoffmahlbarrieren- bzw. Messergruppen längs des Umfanges der Mahlscheiben (1) eine ungleichmäßige Teilung (t) bzw. unterschiedliche Zentriwinkel (ß) aufweisen.1. Refiner for processing fiber material, consisting of two opposing grinding disks (1) driven by an electric motor (3), the mutually facing end faces (5) of processing devices (6) along the circumference of the grinding disks (1) in sectors (13) arranged in groups, parallel to each other, running material grinding barriers or knives and flow channels in between, characterized in that the sectors (13) with the material grinding barrier or knife groups along the circumference of the grinding disks (1) have an uneven division (t) or different central angles ( have). 2. Refiner nach Anspruch 1, dadurch gekennzeichnet, daß jede Mahlscheibe (1) in mindestens zwei gleiche oder nahezu gleiche Bereiche (15) mit gleicher Anzahl von Sektoren (13) unterteilt ist und in jedem Bereich (15) die Zentriwinkel (ß) der aufeinander­folgenden Sektoren (13) bzw. die Teilungen (t) voneinander stark abweichen und von Bereich (15) zu Bereich (15) un­wiederholt anders sind.2. Refiner according to claim 1, characterized in that each grinding disc (1) is divided into at least two identical or almost identical areas (15) with the same number of sectors (13) and in each area (15) the central angle (ß) successive sectors (13) or the divisions (t) differ greatly from one another and are repeatedly different from area (15) to area (15). 3. Refiner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jeder Sektor (13) in zwei oder mehrere radial aufeinanderfolgende Ringsektoren mit unterschiedlicher Anordnung der Stoffmahlbarrieren bzw. Messer unterteilt ist.3. Refiner according to claim 1 or 2, characterized in that each sector (13) is divided into two or more radially consecutive ring sectors with a different arrangement of the substance grinding barriers or knives.
EP87730093A 1986-08-20 1987-08-13 Refiner for the treatment of fibrous material Expired - Lifetime EP0256972B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87730093T ATE59313T1 (en) 1986-08-20 1987-08-13 REFINER FOR PROCESSING FIBER MATERIAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863628195 DE3628195A1 (en) 1986-08-20 1986-08-20 REFINER FOR THE PROCESSING OF FIBER MATERIAL
DE3628195 1986-08-20

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EP0256972A2 true EP0256972A2 (en) 1988-02-24
EP0256972A3 EP0256972A3 (en) 1989-05-10
EP0256972B1 EP0256972B1 (en) 1990-12-27

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EP87730093A Expired - Lifetime EP0256972B1 (en) 1986-08-20 1987-08-13 Refiner for the treatment of fibrous material

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US (1) US4813621A (en)
EP (1) EP0256972B1 (en)
AT (1) ATE59313T1 (en)
DE (2) DE3628195A1 (en)
FI (1) FI84189C (en)

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WO1990004673A1 (en) * 1988-10-25 1990-05-03 Sunds Defibrator Industries Aktiebolag Method at the making of fibre pulp
EP1574615A1 (en) * 2004-03-10 2005-09-14 Voith Paper Patent GmbH Refiner and refiner filling for paper pulp

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US6935589B1 (en) * 1998-08-17 2005-08-30 Norwalk Industrial Components, Llc Papermaking refiner plates and method of manufacture
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EP1574615A1 (en) * 2004-03-10 2005-09-14 Voith Paper Patent GmbH Refiner and refiner filling for paper pulp

Also Published As

Publication number Publication date
ATE59313T1 (en) 1991-01-15
US4813621A (en) 1989-03-21
DE3628195A1 (en) 1988-02-25
FI873582A (en) 1988-02-21
EP0256972A3 (en) 1989-05-10
EP0256972B1 (en) 1990-12-27
DE3767078D1 (en) 1991-02-07
FI873582A0 (en) 1987-08-19
FI84189C (en) 1991-10-25
FI84189B (en) 1991-07-15

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