EP2176001B1 - Stirrer mill - Google Patents

Stirrer mill Download PDF

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Publication number
EP2176001B1
EP2176001B1 EP08784395.9A EP08784395A EP2176001B1 EP 2176001 B1 EP2176001 B1 EP 2176001B1 EP 08784395 A EP08784395 A EP 08784395A EP 2176001 B1 EP2176001 B1 EP 2176001B1
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EP
European Patent Office
Prior art keywords
agitator
shaft
bearing
mill
agitator mill
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EP08784395.9A
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German (de)
French (fr)
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EP2176001A2 (en
Inventor
Udo Enderle
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Netzsch Feinmahltechnik GmbH
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Netzsch Feinmahltechnik GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/181—Bearings specially adapted for tumbling mills

Definitions

  • the invention relates to a stirred mill according to the preamble of claim 1.
  • Stirrer mills and in particular stirred ball mills are known, which for grinding solids in fluids (eg air or water) a grinding container, which surrounds a grinding chamber, which is connected to an inlet and an outlet for material to be ground contains a stirring shaft, outside the grinding container mounted on both sides or on one side, wherein the bearing of the agitator shaft includes an axially force-absorbing fixed bearing in a bearing housing and a radially force-absorbing floating bearing in a bearing housing. Due to the specific types and types of fixed bearing and floating bearing results in a high construction cost for the entire mill.
  • fluids eg air or water
  • the document AU-M-40325/95 describes an attrition mill with a stirrer shaft, which is held outside the grinding container via two bearings.
  • the invention has the goal to reduce the structural complexity of agitator mills.
  • the invention thus provides an agitator mill comprising a grinding container surrounding a grinding chamber connected to an inlet and an outlet for material to be ground, and a stirring shaft which is cantilevered outside the grinding container, the bearing supporting the stirring shaft axially and radially force-absorbing fixed bearing in a bearing housing and a radial force-absorbing movable bearing in a floating bearing housing, further having the fixed bearing and floating bearing separate housing, which are the same size or the same dimensioned, the movable bearing sitting from the grinding container from sitting in front of the bearing and the Fixed bearing housing is axially and / or radially adjustable.
  • a preferred embodiment is that the floating bearing housing is radially adjustable.
  • the fixed bearing for the storage of the stirring shaft contains a withdrawal sleeve. It is further provided that the inner diameter of the withdrawal sleeve of the fixed bearing is smaller than the inner diameter of the clamping sleeve of the floating bearing.
  • the loose bearing for supporting the agitator shaft contains a clamping sleeve bearing, in particular with an adjustable role play.
  • the floating bearing housing for the agitator shaft in particular on both sides depending on a shaft bushing, in which at least one labyrinth seal is seated to seal the floating bearing housing relative to the agitator shaft.
  • the bearing housing for the agitator shaft at least on its side facing the floating bearing, has a shaft leadthrough in which at least one labyrinth seal is seated, around the bearing housing Seal against the stirring shaft.
  • a further preferred embodiment is characterized in that the fixed bearing contains rolling elements and associated bearing shells, wherein the outer ring is connected directly or via the fixed rings with the fixed bearing housing and the inner ring in the direction of shaft end of the agitator shaft of a shaft nut which presses on a sleeve with the stirring shaft is braced.
  • the inner ring of the fixed bearing has a conical bore which sits on a Abziehülse, which is also conically shaped and tapers in the direction of the floating bearing.
  • the grinding container for fixed and floating bearing for the agitator shaft has a passage which contains a stuffing box packing or lip seal or mechanical seal for sealing between grinding container and stirring shaft.
  • a stuffing box packing or lip seal or mechanical seal for sealing between grinding container and stirring shaft.
  • the stirring shaft carries within the grinding container a plurality of grinding discs, which preferably have a plurality of apertures, which are in particular circular, oval or trapezoidal.
  • a separation device upstream of the outlet which in particular contains a sieve and / or a cage in order to separate grinding aids from ground product, wherein the cage is preferably connected to the stirring shaft so that it can co-rotate with it.
  • the sieve has larger openings than the diameter of the grinding bodies.
  • the agitator mill is an agitator ball mill and / or an electric motor is provided for driving the agitator shaft, wherein the fixed bearing and the movable bearing are arranged in the power flow between the electric motor and the grinding container.
  • a lip seal or a mechanical seal can be provided for sealing between the grinding container and the agitator shaft.
  • FIG. 1 schematically an agitator ball mill 1 as an example of an agitator mill R is shown.
  • the agitating ball mill 1 comprises a grinding container 2, which surrounds a grinding chamber 3, which is connected to an inlet 4 and an outlet 5 for material to be ground (not shown), and a stirring shaft 6, which is mounted outside the grinding container 2.
  • a stirring shaft 6 is a storage. 7 with, like that Fig. 2 and 3
  • an axially and radially force-absorbing bearing 8 in a fixed bearing housing 9 and a radial force-absorbing movable bearing 10 in a floating bearing housing 11 is provided.
  • the floating bearing 10 is viewed from the grinding container 2 from before the fixed bearing 8.
  • the bearing housing 9 and the floating bearing housing 11 are the same size and the same size and are the same in the rest.
  • a fixed bearing radial adjustment 13 is provided, which is symbolized only by way of example by adjusting screws 14 and 15. Furthermore, there is a floating bearing radial adjustment 16, which is also symbolized only by way of example by adjusting screws 17 and 18. In addition, a fixed bearing axial adjustment 19 symbolized by adjusting screws 20 and 21 is still provided.
  • the embodiment according to the Fig. 3 also has a floating bearing axial adjustment 22, but the fixed-bearing axial adjustment 19 and the floating bearing axial adjustment 22 are symbolized by guides 23 and 24 and also the fixed-radial adjustment 13 and the floating bearing radial adjustment 16 by only one adjusting screw 14 and 17 are symbolized.
  • the movable bearing housing 11 for the agitator 6 on both sides each have a shaft passage 25 in which a labyrinth seal 26 is seated to seal the floating bearing housing 11 relative to the agitator shaft 6.
  • the bearing housing 9 has for the agitator shaft 6 on its the floating bearing 10 side facing a shaft bushing 27, in which a labyrinth seal 28 on the same shaft diameter of the agitator shaft 6 as the adjacent labyrinth seal 26 sits in the floating bearing housing 11 to the fixed bearing housing 9 relative to the agitator shaft 6 seal.
  • the fixed bearing housing 9 also has on its other side, i. the side facing the electric motor 12, a shaft bushing 27, in which a further labyrinth seal 28 is arranged to seal the bearing housing 9 relative to the agitator shaft 6.
  • the floating bearing 10 contains a clamping sleeve 30 for supporting the agitator shaft 6, ie a clamping sleeve bearing and that with an adjustable role play. Furthermore, the bearing 8 bearing rollers 31 and associated with them bearing shells 32 which are connected via fixed rings 33 with the bearing housing 9 and in the direction of motor shaft end of the agitator shaft 6 of a shaft nut 34 which presses on an intermediate sleeve 35, with the agitator shaft 6 are braced.
  • the bearing rollers 31 of the fixed bearing 8 sit on an inner ring 36 whose bore is conically shaped and tapers in the direction of the floating bearing 10.
  • the grinding container 2 for storage 7 has a passage 37 which contains a gland packing 38 for sealing between the grinding container 2 and the stirring shaft 6.
  • the stirring shaft 6 preferably carries a plurality of grinding disks 39 (of which only one grinding disk is shown by way of example), which have a plurality of openings 40 and are circular, oval or trapezoidal or of other suitable shape.
  • a separator 5 upstream of the outlet 5 is provided, which may include a screen 42 and at least one cage 43 upstream of the outlet 4 for separating grinding aid bodies (not shown) from ground product (not shown), the cage 43 being connected to the Agitator shaft 6 is connected so that it can rotate with her, and serves to prevent clogging of the outlet / sieve 42 and leakage of Mahltosêtn.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Accessories For Mixers (AREA)

Description

Die Erfindung betrifft eine Rührwerksmühle nach dem Oberbegriff des Anspruchs 1.The invention relates to a stirred mill according to the preamble of claim 1.

Aus der DE 2044895 A1 sind Rührwerksmühlen und insbesondere Rührwerkskugelmühlen bekannt, die zur Vermahlung von Feststoffen in Fluiden (z.B. Luft oder Wasser) einen Mahlbehälter, der einen Mahlraum umgibt, der mit einem Einlass und einem Auslass für zu mahlendes Gut verbunden ist, eine Rührwelle enthält, die außerhalb des Mahlbehälters beidseits oder einseitig fliegend gelagert ist, wobei die Lagerung der Rührwelle ein axial kraftaufnehmendes Festlager in einem Lagergehäuse und ein radial kraftaufnehmendes Loslager in einem Lagergehäuse enthält. Auf Grund der jeweils spezifischen Bauformen und -arten von Festlager und Loslager ergibt sich ein hoher baulicher Aufwand für die gesamte Mühle.From the DE 2044895 A1 Stirrer mills and in particular stirred ball mills are known, which for grinding solids in fluids (eg air or water) a grinding container, which surrounds a grinding chamber, which is connected to an inlet and an outlet for material to be ground contains a stirring shaft, outside the grinding container mounted on both sides or on one side, wherein the bearing of the agitator shaft includes an axially force-absorbing fixed bearing in a bearing housing and a radially force-absorbing floating bearing in a bearing housing. Due to the specific types and types of fixed bearing and floating bearing results in a high construction cost for the entire mill.

Das Dokument AU-M-40325/95 beschreibt eine Abriebmühle mit einer Rührwelle, die außerhalb des Mahlbehälters über zwei Lager gehalten wird.The document AU-M-40325/95 describes an attrition mill with a stirrer shaft, which is held outside the grinding container via two bearings.

Die Erfindung hat das Ziel, den baulichen Aufwand bei Rührwerksmühlen zu verringern.The invention has the goal to reduce the structural complexity of agitator mills.

Dieses Ziel wird mit einer Rührwerksmühle nach dem Anspruch 1 erreicht. Bevorzugte und/oder vorteilhafte weitere Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen und deren Kombinationen.This object is achieved with an agitator mill according to claim 1. Preferred and / or advantageous further embodiments emerge from the dependent claims and their combinations.

Durch die Erfindung wird somit eine Rührwerksmühle geschaffen, mit einem Mahlbehälter, der einen Mahlraum umgibt, der mit einem Einlass und einem Auslass für zu mahlendes Gut verbunden ist, und eine Rührwelle, die außerhalb des Mahlbehälters fliegend gelagert ist, wobei die Lagerung der Rührwelle ein axial und radial kraftaufnehmendes Festlager in einem Festlagergehäuse und ein radial kraftaufnehmendes Loslager in einem Loslagergehäuse enthält, wobei weiterhin das Festlager und das Loslager separate Gehäuse aufweisen, die gleich groß oder gleich dimensioniert sind, wobei das Loslager vom Mahlbehälter aus betrachtet vor dem Festlager sitzt und das Festlagergehäuse axial und/oder radial verstellbar ist.The invention thus provides an agitator mill comprising a grinding container surrounding a grinding chamber connected to an inlet and an outlet for material to be ground, and a stirring shaft which is cantilevered outside the grinding container, the bearing supporting the stirring shaft axially and radially force-absorbing fixed bearing in a bearing housing and a radial force-absorbing movable bearing in a floating bearing housing, further having the fixed bearing and floating bearing separate housing, which are the same size or the same dimensioned, the movable bearing sitting from the grinding container from sitting in front of the bearing and the Fixed bearing housing is axially and / or radially adjustable.

Eine vorzugsweise Ausgestaltung besteht darin, dass das Loslagergehäuse radial verstellbar ist.A preferred embodiment is that the floating bearing housing is radially adjustable.

Ferner kann mit Vorzug vorgesehen sein, dass das Festlager zur Lagerung der Rührwelle eine Abziehhülse enthält. Es ist weiterhin vorgesehen, daß der Innendurchmesser der Abziehhülse des Festlagers kleiner ist als der Innendurchmesser der Spannhülse des Loslagers.Furthermore, it can be provided with preference that the fixed bearing for the storage of the stirring shaft contains a withdrawal sleeve. It is further provided that the inner diameter of the withdrawal sleeve of the fixed bearing is smaller than the inner diameter of the clamping sleeve of the floating bearing.

Es ist weiter bevorzugt, wenn das Loslager zur Lagerung der Rührwelle eine Spannhülsenlagerung enthält, insbesondere mit einem einstellbaren Rollenspiel.It is further preferred if the loose bearing for supporting the agitator shaft contains a clamping sleeve bearing, in particular with an adjustable role play.

Bei einer anderen vorzugsweisen Ausgestaltung weist das Loslagergehäuse für die Rührwelle insbesondere beidseits je eine Wellendurchführung auf, in der wenigstens eine Labyrinthdichtung sitzt, um das Loslagergehäuse gegenüber der Rührwelle abzudichten. Alternativ oder zusätzlich kann ferner mit Vorzug vorgesehen sein, dass das Festlagergehäuse für die Rührwelle zumindest auch auf seiner dem Loslager zugewandten Seite eine Wellendurchführung aufweist, in der wenigstens eine Labyrinthdichtung sitzt, um das Festlagergehäuse gegenüber der Rührwelle abzudichten. Die Kombination dieser beiden Ausgestaltungen kann vorteilhaft dadurch weitergebildet sein, dass die Labyrinthdichtung im Festlagergehäuse auf dem gleichen Wellendurchmesser der Rührwelle sitzt wie die benachbarte Labyrinthdichtung im Loslagergehäuse.In another preferred embodiment, the floating bearing housing for the agitator shaft, in particular on both sides depending on a shaft bushing, in which at least one labyrinth seal is seated to seal the floating bearing housing relative to the agitator shaft. Alternatively or additionally, it may also be provided with preference that the bearing housing for the agitator shaft, at least on its side facing the floating bearing, has a shaft leadthrough in which at least one labyrinth seal is seated, around the bearing housing Seal against the stirring shaft. The combination of these two embodiments can advantageously be further developed in that the labyrinth seal in the bearing housing on the same shaft diameter of the agitator shaft sits as the adjacent labyrinth seal in the floating bearing housing.

Eine weitere vorzugsweise Ausgestaltung ist dadurch gekennzeichnet, dass das Festlager Wälzkörper und diesen zugeordnete Lagerschalen enthält, wobei der Außenring direkt oder über die Festringe mit dem Festlagergehäuse verbunden ist und der Innenring in Richtung Wellenende der Rührwelle von einer Wellenmutter, die auf eine Hülse drückt, mit der Rührwelle verspannt ist.A further preferred embodiment is characterized in that the fixed bearing contains rolling elements and associated bearing shells, wherein the outer ring is connected directly or via the fixed rings with the fixed bearing housing and the inner ring in the direction of shaft end of the agitator shaft of a shaft nut which presses on a sleeve with the stirring shaft is braced.

Es ist außerdem bevorzugt, dass der Innenring des Festlagers eine konische Bohrung aufweist, die auf einer Abziehülse sitzt, welche ebenfalls konisch geformt ist und sich in Richtung zum Loslager verjüngt.It is also preferred that the inner ring of the fixed bearing has a conical bore which sits on a Abziehülse, which is also conically shaped and tapers in the direction of the floating bearing.

Noch eine weitere vorzugsweise Ausgestaltung besteht darin, dass der Mahlbehälter zum Fest- und Loslager hin für die Rührwelle einen Durchlass aufweist, der zur Abdichtung zwischen Mahlbehälter und Rührwelle eine Stopfbuchsenpackung oder Lippendichtung oder Gleitringdichtung enthält. Dies kann insbesondere dadurch weitergebildet sein, dass die Rührwelle zur konzentrischen Ausrichtung zur Stopfbuchsenpackung axial und radial verstellbar und im Betrieb fest positioniert ist.Yet another preferred embodiment is that the grinding container for fixed and floating bearing for the agitator shaft has a passage which contains a stuffing box packing or lip seal or mechanical seal for sealing between grinding container and stirring shaft. This can be developed in particular by the fact that the stirring shaft for concentric alignment with the stuffing box packing is axially and radially adjustable and firmly positioned during operation.

Vorzugsweise trägt die Rührwelle innerhalb des Mahlbehälters eine Mehrzahl von Mahlscheiben, die mit Vorzug mehrere Durchbrüche aufweisen, die insbesondere kreisrund, oval oder trapezförmig sind.Preferably, the stirring shaft carries within the grinding container a plurality of grinding discs, which preferably have a plurality of apertures, which are in particular circular, oval or trapezoidal.

Ferner ist es bevorzugt, dass eine dem Auslass vorgeschaltete Trennvorrichtung vorgesehen ist, die insbesondere ein Sieb und/oder einen Käfig enthält, um Mahlhilfskörper von gemahlenem Gut zu trennen, wobei der Käfig vorzugsweise mit der Rührwelle verbunden ist, damit er mit ihr mitrotieren kann.Further, it is preferred that a separation device upstream of the outlet is provided, which in particular contains a sieve and / or a cage in order to separate grinding aids from ground product, wherein the cage is preferably connected to the stirring shaft so that it can co-rotate with it.

Ferner ist bevorzugt, dass das Sieb größere Öffnungen aufweist als der Durchmesser der Mahlkörper.Furthermore, it is preferred that the sieve has larger openings than the diameter of the grinding bodies.

Insbesondere handelt es sich bei der Rührwerksmühle um eine Rührwerkskugelmühle und/oder ist zum Antrieb der Rührwelle ein Elektromotor vorgesehen, wobei das Festlager und das Loslager im Kraftfluß zwischen dem Elektromotor und dem Mahlbehälter angeordnet sind.In particular, the agitator mill is an agitator ball mill and / or an electric motor is provided for driving the agitator shaft, wherein the fixed bearing and the movable bearing are arranged in the power flow between the electric motor and the grinding container.

In einer weiteren vorzugsweisen Ausgestaltung kann zur Abdichtung zwischen dem Mahlbehälter und der Rührwelle eine Lippendichtung oder auch eine Gleitringdichtung vorgesehen werden.In a further preferred embodiment, a lip seal or a mechanical seal can be provided for sealing between the grinding container and the agitator shaft.

Weitere bevorzugte und/oder vorteilhafte Ausgestaltungen der Erfindung und ihrer einzelnen Aspekte ergeben sich neben den Ansprüchen und deren Kombinationen aus den gesamten vorliegenden Anmeldungsunterlagen.Further preferred and / or advantageous embodiments of the invention and its individual aspects emerge in addition to the claims and their combinations from the entire present application documents.

Die Erfindung wird anhand von Ausführungsbeispielen nachfolgend unter Bezugnahme auf die Zeichnung lediglich exemplarisch näher erläutert, in der

Fig. 1
in einer schematischen Schnittansicht ein Ausführungsbeispiel einer Rührwerkskugelmühle zeigt,
Fig. 2
in einer schematischen Schnittansicht ein Ausführungsbeispiel der Lagerung der Rührwelle einer Rührwerkskugelmühle verdeutlicht, und
Fig. 3
in einer schematischen Schnittansicht ein Ausführungsbeispiel des Aufbaus des Festlagers und des Loslagers einer Lagerung der Rührwelle einer Rührwerkskugelmühle veranschaulicht.
The invention will now be described by way of example with reference to exemplary embodiments with reference to the drawing, in which
Fig. 1
in a schematic sectional view shows an embodiment of a stirred ball mill,
Fig. 2
in a schematic sectional view of an embodiment of the storage of the stirring shaft of a stirred ball mill illustrates, and
Fig. 3
in a schematic sectional view of an embodiment of the structure of the fixed bearing and the movable bearing of a storage of the stirring shaft of a stirred ball mill illustrated.

Anhand der nachfolgend beschriebenen und in den Zeichnungen dargestellten Ausführungs- und Anwendungsbeispiele wird die Erfindung lediglich exemplarisch näher erläutert, d.h. sie ist nicht auf diese Ausführungs- und Anwendungsbeispiele oder auf die Merkmalskombinationen innerhalb dieser Ausführungs- und Anwendungsbeispiele beschränkt. Verfahrens- und Vorrichtungsmerkmale ergeben sich jeweils analog auch aus Vorrichtungs- bzw. Verfahrensbeschreibungen.With reference to the embodiments and application examples described below and illustrated in the drawings, the invention will be explained only by way of example, i. it is not limited to these embodiments and examples of application or to the combinations of features within these embodiments and applications. Process and device features result analogously also from device or process descriptions.

Einzelne Merkmale, die im Zusammenhang mit einem konkreten Ausführungsbeispiel angeben und/oder dargestellt sind, sind nicht auf dieses Ausführungsbeispiel oder die Kombination mit den übrigen Merkmalen dieses Ausführungsbeispiels beschränkt, sondern können im Rahmen des technisch Möglichen, mit jeglichen anderen Varianten, auch wenn sie in den vorliegenden Unterlagen nicht gesondert behandelt sind, kombiniert werden.Individual features that are indicated and / or illustrated in connection with a specific embodiment, are not limited to this embodiment or the combination with the other features of this embodiment, but may in the context of the technically possible, with any other variants, even if they are in are not treated separately.

Gleiche Bezugszeichen in den einzelnen Figuren und Abbildungen der Zeichnung bezeichnen gleiche oder ähnliche oder gleich oder ähnlich wirkende Komponenten. Anhand der Darstellungen in der Zeichnung werden auch solche Merkmale deutlich, die nicht mit Bezugszeichen versehen sind, unabhängig davon, ob solche Merkmale nachfolgend beschrieben sind oder nicht. Andererseits sind auch Merkmale, die in der vorliegenden Beschreibung enthalten, aber nicht in der Zeichnung sichtbar oder dargestellt sind, ohne weiteres für einen Fachmann verständlich.The same reference numerals in the individual figures and illustrations of the drawing designate the same or similar or the same or similar components. On the basis of the representations in the drawing, those features are also clear, which are not provided with reference numerals, regardless of whether such features are described below or not. On the other hand, features that are included in the present description but are not visible or illustrated in the drawing will be readily understood by those skilled in the art.

In der Fig. 1 ist schematisch eine Rührwerkskugelmühle 1 als Beispiel für allgemein eine Rührwerksmühle R dargestellt.In the Fig. 1 schematically an agitator ball mill 1 as an example of an agitator mill R is shown.

Die Rührwerkskugelmühle 1 enthält einen Mahlbehälter 2, der einen Mahlraum 3 umgibt, der mit einem Einlass 4 und einem Auslass 5 für zu mahlendes Gut (nicht dargestellt) verbunden ist, und eine Rührwelle 6, die außerhalb des Mahlbehälters 2 fliegend gelagert ist. Für die Rührwelle 6 ist eine Lagerung 7 mit, wie die Fig. 2 und 3 anhand entsprechender Ausführungsbeispiele näher verdeutlichen, einem axial und radial kraftaufnehmenden Festlager 8 in einem Festlagergehäuse 9 und einem radial kraftaufnehmenden Loslager 10 in einem Loslagergehäuse 11 vorgesehen. Auf der vom Mahlbehälter 2 abgewandten Seite der Lagerung 7, durch die die Rührwelle 6 hindurch geht, ist die letztere zum Antrieb über ein Getriebe an einen Elektromotor 12 angeschlossen. Das Loslager 10 ist vom Mahlbehälter 2 aus betrachtet vor dem Festlager 8 angeordnet.The agitating ball mill 1 comprises a grinding container 2, which surrounds a grinding chamber 3, which is connected to an inlet 4 and an outlet 5 for material to be ground (not shown), and a stirring shaft 6, which is mounted outside the grinding container 2. For the stirring shaft 6 is a storage. 7 with, like that Fig. 2 and 3 Based on corresponding embodiments illustrate in more detail, an axially and radially force-absorbing bearing 8 in a fixed bearing housing 9 and a radial force-absorbing movable bearing 10 in a floating bearing housing 11 is provided. On the side facing away from the grinding container 2 side of the bearing 7, through which the agitator shaft 6 passes, the latter is connected to the drive via a gear to an electric motor 12. The floating bearing 10 is viewed from the grinding container 2 from before the fixed bearing 8.

In den Fig. 2 und 3 ist jeweils ein Ausführungsbeispiel der Lagerung 7 der Rührwelle 6 der Rührwerkskugelmühle 1 in schematischen geschnittenen Ansichten gezeigt. Da die beiden Abbildungen und Ausführungsbeispiele einige Merkmale gemeinsam haben, werden zunächst diese gemeinsamen Merkmale erläutert, bevor dann auf spezifische Merkmale jeder einzelnen Figur bzw. jedes konkreten Ausführungsbeispiels eingegangen wird.In the Fig. 2 and 3 in each case an embodiment of the bearing 7 of the agitator shaft 6 of the agitator ball mill 1 is shown in schematic sectional views. Since the two figures and exemplary embodiments have some features in common, these common features will first be explained before then specific features of each individual figure or each specific embodiment will be discussed.

Wie in den Abbildungen der Fig. 2 und 3 gut zu erkennen ist, sind das Festlagergehäuse 9 und das Loslagergehäuse 11 gleich groß und gleich dimensioniert und sind auch im übrigen gleich.As in the pictures of Fig. 2 and 3 can be clearly seen, the bearing housing 9 and the floating bearing housing 11 are the same size and the same size and are the same in the rest.

Bei dem Ausführungsbeispiel der Fig. 2 ist eine Festlager-Radialverstellung 13 vorgesehen, die lediglich exemplarisch durch Verstellschrauben 14 und 15 symbolisiert ist. Ferner gibt es eine Loslager-Radialverstellung 16, die ebenfalls lediglich exemplarisch durch Verstellschrauben 17 und 18 symbolisiert ist. Darüber hinaus ist noch eine Festlager-Axialverstellung 19 symbolisiert durch Verstellschrauben 20 und 21 vorgesehen. Das Ausführungsbeispiel gemäß der Fig. 3 verfügt zudem über eine Loslager-Axialverstellung 22, wobei aber die Festlager-Axialverstellung 19 und die Loslager-Axialverstellung 22 durch Führungen 23 bzw. 24 symbolisiert sind und außerdem die Festlager-Radialverstellung 13 und die Loslager-Radialverstellung 16 durch jeweils nur eine Verstellschraube 14 bzw. 17 symbolisiert sind.In the embodiment of the Fig. 2 is a fixed bearing radial adjustment 13 is provided, which is symbolized only by way of example by adjusting screws 14 and 15. Furthermore, there is a floating bearing radial adjustment 16, which is also symbolized only by way of example by adjusting screws 17 and 18. In addition, a fixed bearing axial adjustment 19 symbolized by adjusting screws 20 and 21 is still provided. The embodiment according to the Fig. 3 also has a floating bearing axial adjustment 22, but the fixed-bearing axial adjustment 19 and the floating bearing axial adjustment 22 are symbolized by guides 23 and 24 and also the fixed-radial adjustment 13 and the floating bearing radial adjustment 16 by only one adjusting screw 14 and 17 are symbolized.

Weiterhin weist das Loslagergehäuse 11 für die Rührwelle 6 beidseits je eine Wellendurchführung 25 auf, in der eine Labyrinthdichtung 26 sitzt, um das Loslagergehäuse 11 gegenüber der Rührwelle 6 abzudichten. Auch das Festlagergehäuse 9 weist für die Rührwelle 6 auf seiner dem Loslager 10 zugewandten Seite eine Wellendurchführung 27 auf, in der eine Labyrinthdichtung 28 auf dem gleichen Wellendurchmesser der Rührwelle 6 wie die benachbarte Labyrinthdichtung 26 im Loslagergehäuse 11 sitzt, um das Festlagergehäuse 9 gegenüber der Rührwelle 6 abzudichten. Das Festlagergehäuse 9 weist auch auf seiner anderen Seite, d.h. der Seite, die dem Elektromotor 12 zugewandt ist, eine Wellendurchführung 27 auf, in der eine weitere Labyrinthdichtung 28 angeordnet ist, um das Festlagergehäuse 9 gegenüber der Rührwelle 6 abzudichten.Furthermore, the movable bearing housing 11 for the agitator 6 on both sides each have a shaft passage 25 in which a labyrinth seal 26 is seated to seal the floating bearing housing 11 relative to the agitator shaft 6. Also, the bearing housing 9 has for the agitator shaft 6 on its the floating bearing 10 side facing a shaft bushing 27, in which a labyrinth seal 28 on the same shaft diameter of the agitator shaft 6 as the adjacent labyrinth seal 26 sits in the floating bearing housing 11 to the fixed bearing housing 9 relative to the agitator shaft 6 seal. The fixed bearing housing 9 also has on its other side, i. the side facing the electric motor 12, a shaft bushing 27, in which a further labyrinth seal 28 is arranged to seal the bearing housing 9 relative to the agitator shaft 6.

Unter Bezugnahme nun nur noch auf die Fig. 3 enthält das Festlager 8 zur Lagerung der Rührwelle 6 eine Abziehhülse 29. Das Loslager 10 enthält eine Spannhülse 30 zur Lagerung der Rührwelle 6, d.h. eine Spannhülsenlagerung und zwar mit einem einstellbaren Rollenspiel. Weiterhin enthält das Festlager 8 Lagerwalzen 31 und diesen zugeordnete Lagerschalen 32, die über Festringe 33 mit dem Festlagergehäuse 9 verbunden und in Richtung motorseitiges Wellenende der Rührwelle 6 von einer Wellenmutter 34, die auf eine Zwischenhülse 35 drückt, mit der Rührwelle 6 verspannt sind. Die Lagerwalzen 31 des Festlagers 8 sitzen auf einem Innenring 36, dessen Bohrung konisch geformt ist und sich in Richtung zum Loslager 10 hin verjüngt.Referring now only to the Fig. 3 The floating bearing 10 contains a clamping sleeve 30 for supporting the agitator shaft 6, ie a clamping sleeve bearing and that with an adjustable role play. Furthermore, the bearing 8 bearing rollers 31 and associated with them bearing shells 32 which are connected via fixed rings 33 with the bearing housing 9 and in the direction of motor shaft end of the agitator shaft 6 of a shaft nut 34 which presses on an intermediate sleeve 35, with the agitator shaft 6 are braced. The bearing rollers 31 of the fixed bearing 8 sit on an inner ring 36 whose bore is conically shaped and tapers in the direction of the floating bearing 10.

Nochmals zurückkehrend zur Fig. 1 weist der Mahlbehälter 2 zur Lagerung 7 hin für die Rührwelle 6 einen Durchlass 37 auf, der zur Abdichtung zwischen Mahlbehälter 2 und Rührwelle 6 eine Stopfbuchsenpackung 38 enthält. Durch die Festlager-Radialverstellung 13, die Loslager-Radialverstellung 16, die Loslager-Axialverstellung 22 und die Festlager-Axialverstellung 19 ist die Rührwelle 6 zur Ausrichtung zur Stopfbuchsenpackung 37 axial und radial verstellbar und im Betrieb fest positioniert. Die Rührwelle 6 trägt innerhalb des Mahlbehälters 2 vorzugsweise eine Mehrzahl von Mahlscheiben 39 (wovon nur eine Mahlscheibe exemplarische gezeigt ist), die mehrere Durchbrüche 40 aufweisen und kreisrund, oval oder trapezförmig oder in anderer geeigneter Form gestaltet sind. Ferner ist eine dem Auslass 5 vorgeschaltete Trennvorrichtung 41 vorgesehen, die eventuell ein Sieb 42 und zumindest aber einen dem Auslaß 4 vorgeschalteten Käfig 43 enthält, um Mahlhilfskörper (nicht gezeigt) von gemahlenem Gut (nicht gezeigt) zu trennen, wobei der Käfig 43 mit der Rührwelle 6 verbunden ist, damit er mit ihr mitrotieren kann, und dazu dient, ein Verstopfen des Auslasses/Siebes 42 und ein Austreten von Mahlhilfskörpern zu verhindern.Returning to the Fig. 1 For the agitator shaft 6, the grinding container 2 for storage 7 has a passage 37 which contains a gland packing 38 for sealing between the grinding container 2 and the stirring shaft 6. By the fixed bearing radial adjustment 13, the floating bearing radial adjustment 16, the floating bearing axial adjustment 22 and the fixed bearing axial adjustment 19, the agitator shaft 6 for alignment with the stuffing box 37 axially and radially adjustable and firmly positioned during operation. Within the grinding container 2, the stirring shaft 6 preferably carries a plurality of grinding disks 39 (of which only one grinding disk is shown by way of example), which have a plurality of openings 40 and are circular, oval or trapezoidal or of other suitable shape. Further, a separator 5 upstream of the outlet 5 is provided, which may include a screen 42 and at least one cage 43 upstream of the outlet 4 for separating grinding aid bodies (not shown) from ground product (not shown), the cage 43 being connected to the Agitator shaft 6 is connected so that it can rotate with her, and serves to prevent clogging of the outlet / sieve 42 and leakage of Mahlhilfskörpern.

Die Erfindung ist anhand der Ausführungsbeispiele in der Beschreibung und in der Zeichnung lediglich exemplarisch dargestellt und nicht darauf beschränkt, sondern umfasst alle Variationen, Modifikationen, Substitutionen und Kombinationen, die der Fachmann den vorliegenden Unterlagen insbesondere im Rahmen des Anspruchs und der allgemeinen Darstellungen in der Einleitung dieser Beschreibung sowie der Beschreibung der Ausführungsbeispiele entnehmen und mit seinem fachmännischen Wissen sowie dem Stand der Technik kombinieren kann. Insbesondere sind alle einzelnen Merkmale und Ausgestaltungsmöglichkeiten der Erfindung und ihrer Ausführungsbeispiele kombinierbar.The invention is illustrated by way of example only and not by way of example in the description and the drawing, but includes all variations, modifications, substitutions and combinations that the skilled person the present documents, in particular in the context of the claim and the general representations in the introduction This description and the description of the embodiments can be found and combined with his expert knowledge and the prior art. In particular, all individual features and design options of the invention and its embodiments can be combined.

Claims (19)

  1. An agitator mill (R), comprising a grinding container (2), which surrounds a grinding chamber (3), which is connected to an inlet (4) and an outlet (5) for the stock to the ground, and an agitator shaft (6), which is mounted in a cantilevered manner outside the grinding container (2), wherein the bearing (7) of the agitator shaft (6) comprises an axially and radially force-absorbing fixed bearing (8) in a fixed bearing housing (9) and a radially force-absorbing floating bearing (10) in a floating bearing housing (11), characterised in that the floating bearing (10), as viewed from the grinding container (2), sits in front of the fixed bearing (8) and the fixed bearing (8) is adjustable axially and/or radially, wherein the fixed bearing (8) and the floating bearing (10) have separate housings which are of identical size and are dimensioned identically.
  2. The agitator mill (R) according to claim 1,
    characterised in
    that the floating bearing (10) is adjustable radially.
  3. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the fixed bearing (8) comprises a withdrawal sleeve (36) for bearing the agitator shaft (6).
  4. The agitator mill (R) according to any ane of the preceding claims,
    characterised in
    that the floating bearing (10) comprises an adapter sleeve (30) for bearing the agitator shaft (6), in particular with an adjustable roller clearance.
  5. The agitator mill (R) according two any one of the preceding claims,
    characterised in
    that the floating bearing housing (11) comprises a shaft gland (25) on both sides for the agitator shaft (6), in which gland at least one labyrinth seal (26) sits in order to seal the floating bearing housing (11) with respect to the agitator shaft (6).
  6. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the fixed bearing housing (9) comprises, on its side facing the floating bearing (10), a shaft gland (27) for the agitator shaft (6), in which gland at least one labyrinth seal (28) sits in order to seal the fixed bearing housing (9) with respect to the agitator shaft (6).
  7. The agitator mill (R) according to claim 6 and 7,
    characterised in
    that the labyrinth seal (28) in the fixed bearing housing (9) sits on the same shaft diameter of the agitator shaft (6) as the adjacent labyrinth seal (26) in the floating bearing housing (11).
  8. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the fixed bearing (8) comprises bearings rollers (31) and bearing shells (32) assigned to the latter, which are connected via fixed rings (33) to the fixed bearing housing (9) and are clamped with the agitator shaft (6) in the direction of the shaft end of the agitator shaft (6) by a shaft nut (34), which presses on an intermediate sleeve (35).
  9. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the fixed bearing (8) comprises an inner ring (35), which sits on a withdrawal sleeve (36), which is formed conically and tapers in the direction towards the floating bearing (10).
  10. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the grinding container (2) comprises, towards the bearing (7), a passage (37) for the agitator shaft (6), which passage contains a gland packing (38) or a lip seal or a sliding ring seal for the seal between the grinding container (2) and the agitator shaft (6).
  11. The agitator mill (R) according to claim 11,
    characterised in
    that the agitator shaft (6) is axially and radially adjustable for the alignment with the gland packing (38) and is positioned fixedly during operation.
  12. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the agitator shaft (6) inside the grinding container (2) carries a plurality of grinding elements (39).
  13. The agitator mill (R) according to claim 13,
    characterised in
    that the grinding discs (39) comprise a plurality of apertures (40), which are in particular circular, oval or trapezoidal.
  14. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that a separating device (41) disposed upstream of the outlet (5) is provided.
  15. The agitator mill (R) according to claim 15,
    characterised in
    that the separating device (41) comprises a rotating cage (43).
  16. The agitator mill (R) according to claim 15 or 16,
    characterised in
    that the separating device (41) comprises an additional sieve (42) in order to separate auxiliary grinding bodies from ground stock.
  17. The agitator mill (R) according to claim 17,
    characterised in
    that the cage (43) is connected to the agitator shaft (6) in order that it can rotate with the latter.
  18. The agitator mill (R) according to any one of the preceding claims,
    characterised in
    that the agitator mill (R) is an agitator bail mill (1).
  19. The agitator mill (R) according to any ane of the preceding claims,
    characterised in
    that an electric motor (12) is provided for driving the agitator shaft (6), and that the fixed bearing (8) and the floating bearing (10) are arranged between the electric motor (12) and the grinding container (2).
EP08784395.9A 2007-08-08 2008-08-06 Stirrer mill Active EP2176001B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007037446A DE102007037446B3 (en) 2007-08-08 2007-08-08 agitating mill
PCT/DE2008/001294 WO2009018819A2 (en) 2007-08-08 2008-08-06 Stirrer mill

Publications (2)

Publication Number Publication Date
EP2176001A2 EP2176001A2 (en) 2010-04-21
EP2176001B1 true EP2176001B1 (en) 2017-12-20

Family

ID=40260825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08784395.9A Active EP2176001B1 (en) 2007-08-08 2008-08-06 Stirrer mill

Country Status (5)

Country Link
EP (1) EP2176001B1 (en)
CN (1) CN102083539B (en)
DE (1) DE102007037446B3 (en)
WO (1) WO2009018819A2 (en)
ZA (1) ZA201000791B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022540A (en) * 2009-09-18 2011-04-20 上海冠龙阀门机械有限公司 Floating shaft lever sealing structure
EP4094837A4 (en) * 2020-01-21 2024-02-28 Eun Sung Lee Ball mill device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682399A (en) * 1969-03-25 1972-08-08 Vyzk Ustav Organ Syntez Apparatus for comminuting and dispersing solid particles
DE2044895C3 (en) * 1970-09-10 1982-08-19 Draiswerke Gmbh, 6800 Mannheim Bearing device for the shaft of an agitator mill
GB1273648A (en) * 1970-10-28 1972-05-10 Smidth & Co As F L Bearings of rotary drums
DE4432200C1 (en) * 1994-09-09 1996-02-29 Evv Vermoegensverwaltungs Gmbh Agitator mill
AU697677B2 (en) * 1994-12-19 1998-10-15 Erich Netzsch Gmbh & Co Holding Kg Attrition mill II
CN2302848Y (en) * 1997-05-08 1999-01-06 李宪章 High-efficiency, energy-saving and drum-shaped milling machine

Also Published As

Publication number Publication date
ZA201000791B (en) 2010-10-27
DE102007037446B3 (en) 2009-04-09
CN102083539B (en) 2012-12-05
WO2009018819A3 (en) 2009-04-09
CN102083539A (en) 2011-06-01
EP2176001A2 (en) 2010-04-21
WO2009018819A9 (en) 2009-05-28
WO2009018819A2 (en) 2009-02-12

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