EP1126908B1 - Dispersing device - Google Patents

Dispersing device Download PDF

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Publication number
EP1126908B1
EP1126908B1 EP99957911A EP99957911A EP1126908B1 EP 1126908 B1 EP1126908 B1 EP 1126908B1 EP 99957911 A EP99957911 A EP 99957911A EP 99957911 A EP99957911 A EP 99957911A EP 1126908 B1 EP1126908 B1 EP 1126908B1
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EP
European Patent Office
Prior art keywords
housing
impeller
grinding
grinding device
dispersed
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Expired - Lifetime
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EP99957911A
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German (de)
French (fr)
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EP1126908A1 (en
Inventor
Hermann Getzmann
Frank Schieweg
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VMA-Getzmann GmbH
VMA Getzmann GmbH
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VMA-Getzmann GmbH
VMA Getzmann GmbH
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Publication of EP1126908A1 publication Critical patent/EP1126908A1/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
    • B02C17/00Disintegrating 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
    • B02C17/16Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/168Mills in which a fixed container houses stirring means tumbling the charge with a basket media milling device arranged in or on the container, involving therein a circulatory flow of the material to be milled

Definitions

  • the invention relates to a dispersing device, in particular a ball or pearl mill with a Containers for receiving and processing a product to be dispersed, a grinding device with a grinding media Housing that has openings for the dispersed material to pass through has, a stirrer arranged in the housing and a first flow generating device, the housing and the stirring tool is movable relative to one another and at least one shaft through a passage opening in the Housing protrudes through which the dispersed material enters the housing can occur, in the housing in the area of Passage opening between the shaft and the housing second flow generating device is provided.
  • Such a grinding device is known from US Pat. No. 5,194,783 known.
  • an agitator immersion mill disclosed which dispersed by the circulation process.
  • she consists essentially of a wear-resistant, with as Grinding ball filled grinding media filled in dips a double-walled container.
  • This Drive shaft drives the arranged in the strainer basket as Rod trained agitator device.
  • the walls of the Sieve basket have perforated perforations in a sieve shape.
  • This Flow generating device must be outside the strainer be located to ensure sufficient flow.
  • the drive shaft thus penetrates the screen basket.
  • a separation and sealing system is installed, that prevents the grinding balls from escaping from the sieve.
  • the central arrangement of the flow generating device brings clear fluidic advantages with it, because it is a even flow through the entire container ensured is.
  • the product to be dispersed must be predispersed. It is preferably predispersed with a dissolver disc, because especially with difficult to disperse agglomerates, which in other methods still use the grinder require optimal predispersion from economical Is essential.
  • An insufficiently pre-dispersed product not only requires longer runtimes from a standing start the known milling devices, but often did not achieve the desired subtleties. Omissions or Errors in predispersion can usually not be caused by other systems are balanced; especially not because because insufficiently pre-dispersed products in the further Use the grinder to plug the holes in the Strainer basket, which causes circulation through the strainer basket difficult or completely prevented.
  • a basket mill is known from EP 0 546 715, on the a cylindrical collar is placed on the upper housing cover, in which an impeller provided on the shaft runs. The inadvertent leakage of the grinding media from the housing also not prevented by this device.
  • the invention is therefore the technical problem based on a dispersion device mentioned in the beginning further develop that an escape of the grinding balls from the Housing or the grinding basket is reliably prevented.
  • this object is achieved in that the second flow generating device designed as an impeller which is the dispersed material during operation by the Passed through the opening in the container in the housing and that the housing in the area of the passage opening as half-shell-shaped pump housing to accommodate the impeller is designed to prevent the grinding media from escaping and that the blades of the impeller towards the housing wall are aligned.
  • the configuration according to the invention is used for the relative movement a flow into the interior of the grinder housing generated. This current is so strong that there is a leak the grinding balls from the passage opening into the Containing dispersed material is reliably prevented.
  • the second flow generating device effects more thorough mixing and faster absorption of the dispersed material in the housing of the grinding device, which the Throughput increased.
  • the flow generating device directs the grinding balls (deflection), which by the Step out of the opening in the grinding basket. Should this Deflection may not be sufficient for each entry of the grinding balls in the passage opening to prevent flow generated by the flow generating device sufficient to get these balls back into the To suck the grinding basket or into the grinding device.
  • the configuration of the dispersing device according to the invention associated with the particular advantage that the flow generated by the flow generating device even the much lighter and cheaper, z.
  • grinding balls designed as glass beads within the grinding device stops so that on the heavier and more expensive, for example grinding balls made of zirconium oxide are dispensed with can be, usually because of their higher density and the associated weight for numerous grinding processes are necessary.
  • the use of inexpensive grinding balls Glass significantly reduces the cost of grinding.
  • the flow generating device is preferably an impeller formed, and the housing of the grinding device in the area of the passage opening a pump housing for receiving of the impeller.
  • the impeller runs in one correspondingly trained area for its inclusion Housing of the grinder. The impeller and the housing thus form a pump for drawing liquid into the Interior of the case.
  • the pump housing essentially has the shape of a half-shell in which the Impeller can be used so that the wings or webs in Are aligned in the direction of the housing wall.
  • the passage opening can be located at the bottom of the funnel, so that the sucked into the interior of the container by the impeller Dispersed material flows down or sucked down the funnel walls becomes.
  • a higher pumping capacity of the impeller is achieved if the pump housing has inclined walls, which on the inclination of the blades of the impeller are adjusted.
  • the gap existing between the impeller and the housing is preferably designed so that it is larger than that Diameter of the grinding balls, so that the grinding balls get jammed between impeller and pump housing is not possible.
  • the impeller is provided with a disc-shaped plate on which at least one wing-like web is arranged, which is in the essentially obliquely to the plate plane in the direction of the axis of rotation the plate extends and in a radial Direction on the plate is substantially oblique to one on the outer circumferential edge of the plate runs tangent. It is both possible to have only one wing-like web to provide the worm-like from the central axis of rotation the plate extends to the outer peripheral edge as also provide several wings on the plate.
  • the second Design has proven to be particularly effective in practice proved. A simplified embodiment provides that the webs are only radial (without curvature and not offset) are to be arranged on the plate.
  • the webs are in a further development in their longitudinal direction crescent-shaped, since this configuration a better deflection of the pearls and a higher one Pump performance guaranteed.
  • impeller In general, numerous web shapes for the impeller are conceivable, which are interchangeable depending on the viscosity of the medium to be ground are. For this purpose, it is particularly advantageous if the impeller can be detachably fastened in the grinding device is to ensure easy replacement.
  • the impeller can both of the flow generating device driving shaft are driven as well by another hollow shaft concentric to the first shaft, which surrounds the first wave.
  • the stirring tool has an annular disc with an all around running, step-like paragraph is provided on which Plate of the impeller is attachable.
  • the impellers are then easily interchangeable depending on the application.
  • the impeller can also be made in one piece with the circular disc be trained.
  • the milling and flow generating device are not driven by the same shaft, but a second shaft can be provided by which the stirring tool and the associated impeller can be driven independently of the first shaft.
  • the second shaft has a hollow shaft which is concentric runs to the first wave and encloses it.
  • the two waves can be used independently of one another operated so that a pre-dispersion by the flow generating device is possible.
  • the outer hollow shaft is connected via a coupling the first shaft is engaged and rotates with the same Speed.
  • the flow generating device has means to disperse on, furthermore is the grinder height adjustable, the grinding device by means of the height adjustment immersed in the dispersed material and completely again is removable therefrom while the flow generating device remains in the dispersed material.
  • This configuration enables a particularly simple and economical Separation of the predispersion by preferably as a dissolver trained flow generating device and a Fine dispersion through the grinder.
  • the Grinder is particularly easy to clean if this is designed such that the housing of the grinding device has an open profile, the stirring tool by a second Shaft can be driven and via at least one connecting web, that runs through the open profile, with the second Shaft is connected and the second shaft is a hollow shaft, that surrounds the first wave.
  • the invention is also in such agitator ball mills applicable where the shaft is fixed and the agitator carries and wherein the housing rotatable relative to the agitator is.
  • Such an agitator ball mill is then designed that the second flow generating device has a wing-like Has web, which is provided on the housing and a flow into the interior through the passage opening of the housing.
  • the flow generating device advantageously has one or more webs on the housing in the area of Passage opening are formed.
  • Dispersing device consisting essentially of a cylindrical Container 1, a dissolver 2 and an agitator ball mill 3. 1 shows only the lower section of the container 1 shown.
  • the dissolver consists of a cylindrical shaft 21 which has a dissolver disk 22 at its lower end.
  • the Dissolver disc is with several, along its circumference the circular surface alternately curved upwards and downwards Teeth 23 equipped.
  • the agitator ball mill preferably consists of a toroidal one Housing 31, in which an annular ring channel 32nd is trained.
  • the grinding balls 33 are in the annular channel 32 contain.
  • the grinding balls 33 are only in the drawing indicated as an example.
  • the ring channel is usually 32 filled with grinding balls 33.
  • the housing 31 is on the shaft 21 directed side with an all-round opening 34 Mistake.
  • the housing 31 is in the example shown double-walled, being between the walls in the wash chamber 35 formed therein, which is also annular is formed over a tempering medium at will the rods 4 designed for lowering the housing 31 can be flushed in is.
  • the rods 4 are hollow and include a feed channel and a discharge channel for the temperature control medium.
  • the housing is shown on its in relation to Figure 1 lower end with a perforated disc perforated like a sieve 25 closed, which is screwed to the housing 31.
  • a perforated disc perforated like a sieve 25 closed, which is screwed to the housing 31.
  • This perforated disc 25 flows the dispersed material through the housing 31; at the same time, the perforated disk 25 prevents the Grinding balls 33 fall out of the ring channel 32.
  • the dispersed material passes through the passage opening between the housing 31 and the shaft in the housing 31.
  • the flow of the Dispersed goods are in this area by the dashed lines Arrows shown.
  • a central bushing 26 is attached to the perforated disk 25 Screws 27 attached.
  • This socket 26 takes a cylindrical Sleeve 28 on.
  • an annular one Plain bearing 29 arranged between the outside of this sleeve 28 and the inside of the connecting sleeve 37 .
  • This slide bearing 29 prevents that the grinding balls 33 unintentionally in the gap between the Penetrating sleeve 37 and the cylindrical sleeve 28 can.
  • the slide bearing 29 causes a relative movement of the two parts to each other.
  • Ring running circular washer 36 which has a connecting sleeve 37 is connected to a hollow shaft 38, which surrounds the shaft 21.
  • the shaft 21 and the hollow shaft 38 are driven by a motor, not shown.
  • the shaft 21 is in the connecting sleeve 37 in relation to this rotatably mounted.
  • the storage takes place in the present Fall over another between the inside of the connecting sleeve 37 and the outside of the shaft 21 arranged Slide bearing 40. This also allows an axially simple Moving the housing 31 with the hollow shaft 38 in relation to the shaft 21 of the dissolver 2.
  • the connecting sleeve 37 has a circumferential step-like Paragraph 41 on which an impeller 5 is attached.
  • the impeller 5 also in one piece on the connecting sleeve 37 or the annular disc 36 may be formed.
  • the impeller 5 consists of an annular and disc-shaped Plate 50 on which several wing-like webs are arranged, which are substantially oblique to the plate plane extend in the direction of the axis of rotation of the plate 50 and in the radial direction from the axis of rotation in substantially obliquely to one on the outer peripheral edge of the Plate 50 tangent run.
  • a pump housing 42 for receiving in the area of the passage opening of the impeller 5 is formed in the housing 31.
  • the housing also has a funnel-shaped inlet 43, the one at its bottom on the side facing away from the funnel the pump housing 42 is provided for the impeller 5.
  • the pump housing 42 has an inclined wall provided which is adapted to the slope of the webs of the impeller is. This configuration results in a higher pump output accomplished since the pump housing 42 on each Point is closer to the webs of the impeller.
  • the Gap between the top edge of the webs and the wall of the pump housing is dimensioned such that a grinding ball 33 is not can be pinched between them.
  • a circumferential nose 44 is provided.
  • the nose 44 is present formed in one piece with the housing 31 and reliably prevents that the grinding balls 33 laterally in the pump housing 42 can penetrate.
  • the impeller 5 with its plate 50 and the webs 51 arranged thereon can be seen.
  • the webs 51 are trained so that they do not reach the inner edge of the Plate 50 run. This configuration allows the dispersed material better through the passage opening in the ring channel 32 flow into the housing 31.
  • This current is in the Figure 1 represented by arrows.
  • the impeller 5 is shown in plan view.
  • the circular plate 50 is clearly visible, from which the wing-like webs 51 in the viewing direction of Figure 3 raise.
  • the webs 51 run essentially obliquely to one on the outer peripheral edge of the plate 50 applied tangent 52 and are substantially sickle-shaped educated.
  • This configuration enables a particularly high pump output and at the same time manages a gapless Deflection of the outside of the impeller 5 approaching grinding balls 33.
  • the dispersed material flows during the operation in the dispersing device in the viewing direction into the inner opening and will by the rotation by those formed between the webs 51 Channels 53 in the direction of the outer peripheral edge of the Impeller 5 promoted. Due to the crescent shape the web 51 the dispersed material is additionally accelerated.
  • Impeller 6 also shown in plan view.
  • the webs 61 are made narrower than that of the impeller according to FIG. 3, so that the channels 62 between the webs are wider.
  • Such an impeller 6 can be used, for example, for more viscous dispersed goods.
  • FIG. 5 shows a further embodiment of the impeller 7 in plan view.
  • the impeller can be replaced depending on the viscosity.
  • FIG. 7 shows a further embodiment of the invention Impeller shown in plan view.
  • the Impeller 9 is on the annular plate 90 with webs 91 provided, which essentially according to. the previously described Webs are formed on the other impellers 5-7. in the Difference from these are the webs 91 on outer peripheral edge 92 with extending along this peripheral edge Provided extensions 93. In the top view they see Get out 91 like a hockey stick.
  • the extensions 93 of the Ridges redirect the dispersed material and cause one increased turbulence and improved mixing of the To be dispersed.
  • a particularly safe deflection of the possibly in the Pump housing 42 reached grinding balls 33 reached.
  • FIG. 8 shows an alternative embodiment of the impeller according to the invention, in which on the plate 94 a single, helical from the inner edge to the outer Web 95 running circumferential edge is provided.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

A dispersing device has a container that receives and processes a product to be dispersed and a grinding device with a housing that contains grinding bodies, wherein said housing has openings enabling the product to be dispersed to pass through, an agitating tool arranged in the housing and a first flow-producing device, and wherein the housing and the agitating tool can move relative to one another and at least one shaft protrudes into the housing via a through-opening that allows the product to be dispersed to enter the housing. In order to reliably prevent grinding balls from escaping from the housing or the grinding basket, it is proposed that another flow-producing device be provided in the region of the through-opening between the shaft (21) and the housing (31), which transports the product to be dispersed through the through-opening, out of the container (1) and into the housing (31) during operation and has means to prevent the grinding media from leaving the housing (31).

Description

Die Erfindung betrifft eine Dispergiervorrichtung, insbesondere eine als Tauchmühle einsetzbare Kugel- oder Perlmühle mit einem Behälter zur Aufnahme und Bearbeitung eines Dispergiergutes, einer Mahlvorrichtung mit einem Mahlkörper enthaltenden Gehäuse, das Öffnungen zum Hindurchtreten des Dispergiergutes aufweist, einem in dem Gehäuse angeordneten Rührwerkzeug und einer ersten Strömungserzeugungsvorrichtung, wobei das Gehäuse und das Rührwerkzeug relativ zueinander beweglich sind und zumindest eine Welle durch eine Durchtrittsöffnung in das Gehäuse ragt, durch die das Dispergiergut in das Gehäuse eintreten kann, wobei in dem Gehäuse im Bereich der Durchtrittsöffnung zwischen der Welle und dem Gehäuse eine zweite Strömungserzeugungsvorrichtung vorgesehen ist.The invention relates to a dispersing device, in particular a ball or pearl mill with a Containers for receiving and processing a product to be dispersed, a grinding device with a grinding media Housing that has openings for the dispersed material to pass through has, a stirrer arranged in the housing and a first flow generating device, the housing and the stirring tool is movable relative to one another and at least one shaft through a passage opening in the Housing protrudes through which the dispersed material enters the housing can occur, in the housing in the area of Passage opening between the shaft and the housing second flow generating device is provided.

Durch eine derartige Vorrichtung wird eine Verteilung von feinund feinstteiligen festen Bestandteilen in der flüssigen Phase erreicht.With such a device, a distribution of fine and finely divided solid components in the liquid phase reached.

Beim Dispergierprozeß laufen drei Teilschritte nebeneinander ab:

  • 1. Die Benetzung der Oberfläche des einzuarbeitenden Feststoffes durch flüssige Bestandteile des Dispergiergutes;
  • 2. die mechanische Zerteilung von Agglomeraten in kleinere Agglomerate und Primärartikel und
  • 3. die Stabilisierung von Primärartikeln, Agglomeraten und Aggregaten gegen erneute Zusammenlagerung (= Flockung).
  • In the dispersion process, three sub-steps run side by side:
  • 1. The wetting of the surface of the solid to be incorporated by liquid components of the dispersed material;
  • 2. the mechanical division of agglomerates into smaller agglomerates and primary articles and
  • 3. the stabilization of primary articles, agglomerates and aggregates against renewed assembly (= flocculation).
  • Obwohl sich die nachstehenden Ausführungen überwiegend auf die Dispergierung von Farben und Lacken beziehen, läßt sich diese Verfahrenstechnik analog auch auf andere Bereiche (z.B. Biologie, Lebensmitteltechnologie, Pharmazie, Agrochemie, keramische Industrie u.a.) übertragen.Although the following explanations mainly relate to the Dispersion of paints and varnishes can be obtained Process engineering analogous to other areas (e.g. biology, Food technology, pharmacy, agrochemical, ceramic Industry etc.) transferred.

    Aus der US-PS 5,194,783 ist eine derartige Mahlvorrichtung bekannt. In dieser Patentschrift wird eine Rührwerks-Tauchmühle offenbart, die nach dem Zirkulationsverfahren dispergiert. Sie besteht im wesentlichen aus einem verschleißfesten, mit als Mahlkugein ausgebildeten Mahlkörpern gefüllten Siebkorb, der in einen doppelwandigen Behälter eintaucht. Durch die Mitte des Siebkorbs verläuft eine zylindrische Antriebswelle. Diese Antriebswelle treibt die in dem Siebkorb angeordnete, als Stangen ausgebildete Rührwerksvorrichtung an. Die Wände des Siebkorbs weisen eine siebartig perforierte Lochung auf.Such a grinding device is known from US Pat. No. 5,194,783 known. In this patent there is an agitator immersion mill disclosed which dispersed by the circulation process. she consists essentially of a wear-resistant, with as Grinding ball filled grinding media filled in dips a double-walled container. Through the middle of the Sieve basket runs a cylindrical drive shaft. This Drive shaft drives the arranged in the strainer basket as Rod trained agitator device. The walls of the Sieve basket have perforated perforations in a sieve shape.

    Bei der Dispergierung von Farben ist es z.B. von wirtschaftlichem Interesse, den Einsatz der kostenintensiveren farbgebenden Primärteilchen so gering wie möglich zu halten. Die Farbwirkung und der Glanz werden um so intensiver, je besser dispergiert wird. Durch eine gute Dispergierung kann also z.B. der Einsatz der kostenintensiven farbgebenden Primärteilchen durch die kostengünstigeren Sekundärteilchen verringert werden. Im Idealfall ist jedes Primärteilchen separat benetzt.When dispersing paints it is e.g. of economic Interest, the use of the more expensive coloring Keep primary particles as low as possible. The color effect and the shine become more intense the better dispersed becomes. With good dispersion, e.g. the stake of the costly coloring primary particles through the cheaper secondary particles can be reduced. in the Ideally, each primary particle is wetted separately.

    Um die Zirkulation des Dispergierguts durch den Siebkorb zu ermöglichen, treibt die Antriebswelle neben der Rührwerksvorrichtung zudem eine Strömungserzeugungsvorrichtung an. Diese Strömungserzeugungsvorrichtung muß außerhalb des Siebkorbs gelegen sein, um eine ausreichende Strömung zu gewährleisten. To ensure the circulation of the dispersed material through the sieve basket enable, drives the drive shaft next to the agitator device also a flow generating device. This Flow generating device must be outside the strainer be located to ensure sufficient flow.

    Die Antriebswelle durchdringt also den Siebkorb. An der Durchdringungsstelle ist ein Trenn- und Dichtungssystem eingebaut, dass den Austritt der Mahlkugeln aus dem Sieb verhindert. Die zentrale Anordnung der Strömungserzeugungsvorrichtung bringt eindeutige strömungstechnische Vorteile mit sich, da somit ein gleichmäßiges Durchströmen des gesamten Behälters sichergestellt ist.The drive shaft thus penetrates the screen basket. At the penetration point a separation and sealing system is installed, that prevents the grinding balls from escaping from the sieve. The central arrangement of the flow generating device brings clear fluidic advantages with it, because it is a even flow through the entire container ensured is.

    Zur Durchführung eines wirtschaftlichen Dispergierprozesses mit der aus dem Stand der Technik bekannten Dispergiervorrichtung muß das Dispergiergut jedoch vordispergiert werden. Vorzugsweise wird mit einer Dissolverscheibe vordispergiert, da insbesondere bei schwer dispergierbaren Agglomeraten, die im weiteren Verfahren noch den Einsatz der Mahlvorrichtung erfordern, eine optimale Vordispergierung aus wirtschaftlichen Gründen unerläßlich ist. Ein ungenügend vordispergiertes Produkt erfordert nicht nur längere Laufzeiten der aus dem Stand der Technik bekannten Mahlvorrichtungen, sondern es werden oft nicht die erwünschten Feinheiten erreicht. Versäumnisse oder Fehler bei der Vordispergierung können in der Regel nicht durch andere Systeme ausgeglichen werden; insbesondere deshalb nicht, weil unzureichend vordispergierte Produkte bei der weiteren Verwendung der Mahlvorrichtung das Zusetzen der Löcher des Siebkorbs bewirken, wodurch die Zirkulation durch den Siebkorb erschwert oder vollständig verhindert wird.To carry out an economical dispersion process with the dispersing device known from the prior art However, the product to be dispersed must be predispersed. It is preferably predispersed with a dissolver disc, because especially with difficult to disperse agglomerates, which in other methods still use the grinder require optimal predispersion from economical Is essential. An insufficiently pre-dispersed product not only requires longer runtimes from a standing start the known milling devices, but often did not achieve the desired subtleties. Omissions or Errors in predispersion can usually not be caused by other systems are balanced; especially not because because insufficiently pre-dispersed products in the further Use the grinder to plug the holes in the Strainer basket, which causes circulation through the strainer basket difficult or completely prevented.

    Obgleich mit den aus dem Stand der Technik bekannten Vorrichtungen bereits sehr zufriedenstellende Mahlleistungen erreicht werden, ist sie - wie nahezu alle Rührwerkskugelmühlen - mit dem Nachteil behaftet, dass an der Durchdringungsstelle der Welle durch den Mahlkorb ein dynamischer Reibspalt oder ähnliche Mittel vorgesehen sind, durch welche die Mahlkugeln aus dem Gehäuse bzw. Mahlkorb in den Behälter entweichen können. Darüber hinaus erfordern dynamische Reibspalte für die einwandfreie Funktion relativ enge Toleranzen, so dass ihre Fertigung aufwendig und teuer ist. Aber auch bei genauester Fertigung und einwandfreiem Betrieb tritt gleichwohl das Problem auf, dass die Mahlkugeln unbeabsichtigt in dem Reibspalt zertrümmert werden, den Reibspalt zerstören und das Dispergiergut verunreinigen.Although with the devices known from the prior art already achieved very satisfactory grinding performance it is - like almost all agitator ball mills - with suffers from the disadvantage that at the point of penetration Shaft through the grinding basket a dynamic friction gap or the like Means are provided through which the grinding balls from the Housing or grinding basket can escape into the container. They also require dynamic friction gaps for flawless Function relatively tight tolerances, so their manufacture is complex and expensive. But also with the most precise production and proper operation nevertheless the problem arises that the grinding balls inadvertently smashed into the friction gap become, destroy the friction gap and the dispersed material contaminate.

    Ein weiteres Problem tritt an der ringförmigen Durchtrittsöffnung zwischen der Welle und dem Gehäuse auf. Im Betrieb führen diese Bauteile eine Relativbewegung zueinander aus. Durch diesen Ringspalt tritt das Dispergiergut in das Gehäuse ein, war für den Mahlprozeß notwendig ist.Another problem arises at the annular passage opening between the shaft and the housing. Run in operation these components move relative to each other. By the dispersed material enters the housing through this annular gap, was necessary for the grinding process.

    Andererseits ist diese Durchtrittsöffnung mit dem erheblichen Nachteil verbunden, dass während des Mahlprozesses unkontrolliert und ungewollt Mahlkugeln aus dem Gehäuse austreten. Dieses ist in zweierlei Hinsicht nachteilig. Zum einen muß das Dispergiergut nach dem Mahlprozeß und vor der Weiterverarbeitung nochmals abgesiebt werden, um die Perlen herauszufiltern, so dass ein weiterer zeitaufwendiger Arbeitsschritt notwendig ist. Daneben muß der Perlenverlust in regelmäßigen Abschnitten ausgeglichen werden, da sonst die Mahlleistung abnimmt.On the other hand, this passage opening is significant Disadvantage associated that uncontrolled during the grinding process and unintentionally emerge grinding balls from the housing. This is disadvantageous in two ways. For one thing, it has to Dispersed material after the grinding process and before further processing sieved again to filter out the pearls, so another time-consuming step is necessary is. In addition, the pearl loss must be in regular sections be compensated for, otherwise the grinding capacity will decrease.

    Aus der EP 0 546 715 ist eine Korbmühle bekannt, auf deren oberen Gehäusedeckel ein zylindrischer Kragen aufgesetzt ist, in dem ein an der Welle vorgesehenes Flügelrad läuft. Der unbeabsichtigte Austritt der Mahlkörper aus dem Gehäuse wird auch durch diese Vorrichtung nicht unterbunden.A basket mill is known from EP 0 546 715, on the a cylindrical collar is placed on the upper housing cover, in which an impeller provided on the shaft runs. The inadvertent leakage of the grinding media from the housing also not prevented by this device.

    Der Erfindung liegt demnach die technische Problemstellung zugrunde, eine eingangs genannte Dispergiervorrichtung derart weiterzuentwickeln, dass ein Austreten der Mahlkugeln aus dem Gehäuse bzw. dem Mahlkorb zuverlässig unterbunden wird. The invention is therefore the technical problem based on a dispersion device mentioned in the beginning further develop that an escape of the grinding balls from the Housing or the grinding basket is reliably prevented.

    Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die zweite Strömungserzeugungsvorrichtung als Flügelrad ausgebildet ist, die das Dispergiergut während des Betriebs durch die Durchtrittsöffnung in dem Behälter in das Gehäuse befördert und dass das Gehäuse im Bereich der Durchtrittsöffnung als halbschalenförmiges Pumpengehäuse zur Aufnahme des Flügelrades ausgebildet ist, um das Austreten des Mahlkörpers zu verhindern und dass die Flügel des Flügelrades in Richtung der Gehäusewand ausgerichtet sind.According to the invention, this object is achieved in that the second flow generating device designed as an impeller which is the dispersed material during operation by the Passed through the opening in the container in the housing and that the housing in the area of the passage opening as half-shell-shaped pump housing to accommodate the impeller is designed to prevent the grinding media from escaping and that the blades of the impeller towards the housing wall are aligned.

    Durch die erfindungsgemäße Ausgestaltung wird bei der Relativbewegung eine Strömung in das Innere des Gehäuses der Mahlvorrichtung erzeugt. Diese Strömung ist so stark, dass ein Austreten der Mahlkugeln aus der Durchtrittsöffnung in das in dem Behälter enthaltene Dispergiergut zuverlässig verhindert wird. Darüber hinaus bewirkt die zweite Strömungserzeugungsvorrichtung eine stärkere Durchmischung und ein schnelleres Einziehen des Dispergierguts in das Gehäuse der Mahlvorrichtung, was den Durchsatz erhöht. Schließlich lenkt die Strömungserzeugungsvorrichtung die Mahlkugeln ab (Deflektion), welche durch die Durchtrittsöffnung aus dem Mahlkorb heraustreten. Sollte diese Deflektion nicht ausreichend sein, um jeden Eintritt der Mahlkugeln in die Durchtrittsöffnung zu verhindern, so ist die durch die Strömungserzeugungsvorrichtung erzeugte Strömung ausreichend, um diese dennoch austretenden Kugeln zurück in den Mahlkorb bzw. in die Mahlvorrichtung zu saugen. Darüber hinaus ist die erfindungsgemäße Ausgestaltung der Dispergiervorrichtung mit dem besonderen Vorteil verbunden, daß die durch die Strömungserzeugungsvorrichtung erzeugte Strömung selbst die wesentlich leichteren und preisgünstigeren, z. B. als Glasperlen ausgebildeten Mahlkugeln innerhalb der Mahlvorrichtung hält, so daß auf die schwereren und teureren, beispielsweise aus Zirkonoxid bestehenden Mahlkugeln verzichtet werden kann, die üblicherweise wegen ihrer höheren Dichte und des damit verbundenen Gewichts für zahlreiche Mahlprozesse notwendig sind. Der Einsatz kostengünstiger Mahlkugeln aus Glas reduziert deutlich die Kosten des Mahlens.The configuration according to the invention is used for the relative movement a flow into the interior of the grinder housing generated. This current is so strong that there is a leak the grinding balls from the passage opening into the Containing dispersed material is reliably prevented. In addition, the second flow generating device effects more thorough mixing and faster absorption of the dispersed material in the housing of the grinding device, which the Throughput increased. Finally, the flow generating device directs the grinding balls (deflection), which by the Step out of the opening in the grinding basket. Should this Deflection may not be sufficient for each entry of the grinding balls in the passage opening to prevent flow generated by the flow generating device sufficient to get these balls back into the To suck the grinding basket or into the grinding device. Furthermore is the configuration of the dispersing device according to the invention associated with the particular advantage that the flow generated by the flow generating device even the much lighter and cheaper, z. B. grinding balls designed as glass beads within the grinding device stops, so that on the heavier and more expensive, for example grinding balls made of zirconium oxide are dispensed with can be, usually because of their higher density and the associated weight for numerous grinding processes are necessary. The use of inexpensive grinding balls Glass significantly reduces the cost of grinding.

    Vorzugsweise ist die Strömungserzeugungsvorrichtung als Flügelrad ausgebildet, und das Gehäuse der Mahlvorrichtung weist im Bereich der Durchtrittsöffnung ein Pumpengehäuse zur Aufnahme des Flügelrads auf. Das Flügelrad läuft also in einem entsprechend für dessen Aufnahme ausgebildeten Bereich des Gehäuses der Mahlvorrichtung. Das Flügelrad und das Gehäuse bilden so eine Pumpe zum Einsaugen von Flüssigkeit in das Innere des Gehäuses.The flow generating device is preferably an impeller formed, and the housing of the grinding device in the area of the passage opening a pump housing for receiving of the impeller. The impeller runs in one correspondingly trained area for its inclusion Housing of the grinder. The impeller and the housing thus form a pump for drawing liquid into the Interior of the case.

    Besonders vorteilhaft ist es, wenn das Pumpengehäuse im wesentlichen die Form einer Halbschale aufweist, in die das Flügelrad so einsetzbar ist, daß die Flügel bzw. Stege in Richtung der Gehäusewand ausgerichtet sind.It is particularly advantageous if the pump housing essentially has the shape of a half-shell in which the Impeller can be used so that the wings or webs in Are aligned in the direction of the housing wall.

    In einer besonders vorteilhaften Weiterentwicklung ist der obere Bereich des Gehäuses trichterförmig ausgebildet, der an seinem Grund auf der dem Trichter abgewandten Seite das Pumpengehäuse für das Flügelrad aufweist. Die Durchtrittsöffnung kann dabei an dem Grund des Trichters gelegen sein, so daß das von dem Flügelrad in das Innere des Behälters eingesaugte Dispergiergut an den Trichterwänden hinabströmt bzw. hinabgesaugt wird.In a particularly advantageous development, the upper area of the housing funnel-shaped, the the bottom of the pump housing on the side facing away from the funnel for the impeller. The passage opening can be located at the bottom of the funnel, so that the sucked into the interior of the container by the impeller Dispersed material flows down or sucked down the funnel walls becomes.

    Eine höhere Pumpleistung des Flügelrads wird erreicht, wenn das Pumpengehäuse schräg verlaufende Wände aufweist, welche an die Schräge der Flügel des Flügelrads angepaßt sind. A higher pumping capacity of the impeller is achieved if the pump housing has inclined walls, which on the inclination of the blades of the impeller are adjusted.

    Der zwischen dem Flügelrad und dem Gehäuse existierende Spalt ist vorzugsweise so ausgebildet, daß er größer ist als der Durchmesser der Mahlkugeln, so daß ein Einklemmen der Mahlkugeln zwischen Flügelrad und Pumpengehäuse nicht möglich ist.The gap existing between the impeller and the housing is preferably designed so that it is larger than that Diameter of the grinding balls, so that the grinding balls get jammed between impeller and pump housing is not possible.

    In einer vorteilhaften Weiterentwicklung ist an dem äußeren Umfangsrand der zum Gehäuseinneren gerichteten Öffnung des Pumpengehäuses eine umlaufende Nase vorgesehen. Diese Nase verhindert, daß die Mahlkugeln direkt in den Bereich zwischen dem Flügelrad und dem Pumpengehäuse eintreten können. Durch geeignete Ausbildung der Nase werden diese Mahlkugeln zurück in das Innere der Mahlvorrichtung gelenkt.In an advantageous further development is on the outside Circumferential edge of the opening of the Pump housing provided a circumferential nose. That nose prevents the grinding balls from directly into the area between can enter the impeller and the pump housing. By Appropriate training of the nose, these grinding balls will return directed into the interior of the grinder.

    Als besonders vorteilhaft hat es sich erwiesen, daß das Flügelrad mit einer scheibenförmigen Platte versehen ist, auf der mindestens ein flügelartiger Steg angeordnet ist, der sich im wesentlichen schräg zur Plattenebene in Richtung der Rotationsachse der Platte erstreckt und in radial verlaufender Richtung auf der Platte im wesentlichen schräg zu einer an dem äußeren Umfangsrand der Platte angelegten Tangente verläuft. Dabei ist es sowohl möglich, nur einen flügelartigen Steg vorzusehen, der sich schneckenartig von der mittleren Drehachse der Platte an den äußeren Umfangsrand erstreckt, als auch mehrere Flügel auf der Platte vorzusehen. Die zweite Ausgestaltung hat sich in der Praxis als besonders wirkungsvoll erwiesen. Eine vereinfachte Ausführungsform sieht vor, daß die Stege nur radial (ohne Krümmung und nicht schräg versetzt) auf der Platte anzuordnen sind.It has proven to be particularly advantageous that the impeller is provided with a disc-shaped plate on which at least one wing-like web is arranged, which is in the essentially obliquely to the plate plane in the direction of the axis of rotation the plate extends and in a radial Direction on the plate is substantially oblique to one on the outer circumferential edge of the plate runs tangent. It is both possible to have only one wing-like web to provide the worm-like from the central axis of rotation the plate extends to the outer peripheral edge as also provide several wings on the plate. The second Design has proven to be particularly effective in practice proved. A simplified embodiment provides that the webs are only radial (without curvature and not offset) are to be arranged on the plate.

    In einer Weiterentwicklung sind die Stege in ihrer Längserstreckungsrichtung sichelförmig ausgebildet, da diese Ausgestaltung eine bessere Deflektion der Perlen und eine höhere Pumpenleistung gewährleistet.The webs are in a further development in their longitudinal direction crescent-shaped, since this configuration a better deflection of the pearls and a higher one Pump performance guaranteed.

    Allgemein sind zahlreiche Stegformen für das Flügelrad denkbar, die je nach Viskosität des zu mahlenden Mediums austauschbar sind. Zu diesem Zweck ist es besonders vorteilhaft, wenn das Flügelrad lösbar in der Mahlvorrichtung befestigbar ist, um ein leichtes Austauschen zu gewährleisten. Das Flügelrad kann dabei sowohl von der die Strömungserzeugungsvorrichtung antreibenden Welle angetrieben werden als auch durch eine weitere konzentrisch zur ersten Welle verlaufenden Hohlwelle, welche die erste Welle umschließt.In general, numerous web shapes for the impeller are conceivable, which are interchangeable depending on the viscosity of the medium to be ground are. For this purpose, it is particularly advantageous if the impeller can be detachably fastened in the grinding device is to ensure easy replacement. The impeller can both of the flow generating device driving shaft are driven as well by another hollow shaft concentric to the first shaft, which surrounds the first wave.

    Es hat sich als besonders vorteilhaft erwiesen, wenn das Rührwerkzeug eine Kreisringscheibe aufweist, die mit einem ringsum laufenden, stufenartigen Absatz versehen ist, auf dem die Platte des Flügelrads befestigbar ist. Die Flügelräder sind dann je nach Anwendungsfall einfach austauschbar. Alternativ kann das Flügelrad aber auch einteilig mit der Kreisringscheibe ausgebildet sein.It has proven to be particularly advantageous if the stirring tool has an annular disc with an all around running, step-like paragraph is provided on which Plate of the impeller is attachable. The impellers are then easily interchangeable depending on the application. alternative the impeller can also be made in one piece with the circular disc be trained.

    Wie zuvor erwähnt, müssen die Mahl- und die Strömungserzeugungsvorrichtung nicht durch dieselbe Welle angetrieben werden, sondern es kann eine zweite Welle vorgesehen sein, durch welche das Rührwerkzeug und das damit verbundene Flügelrad unabhängig von der ersten Welle antreibbar sind.As previously mentioned, the milling and flow generating device are not driven by the same shaft, but a second shaft can be provided by which the stirring tool and the associated impeller can be driven independently of the first shaft.

    In der Praxis hat es sich als besonders vorteilhaft erwiesen, wenn die zweite Welle eine Hohlwelle aufweist, welche konzentrisch zu der ersten Welle verläuft und diese umschließt. Bei dieser Ausgestaltung können die beiden Wellen unabhängig voneinander betrieben werden, so daß eine Vordispergierung durch die Strömungserzeugungsvorrichtung möglich ist. Für die Feindispergierung wird die äußere Hohlwelle über eine Kupplung mit der ersten Welle eingekuppelt und dreht sich mit gleicher Geschwindigkeit. Alternativ ist es möglich, die beiden Wellen unabhängig voneinander anzutreiben und mit unterschiedlichen Drehzahlen rotieren zu lassen.In practice, it has proven to be particularly advantageous if the second shaft has a hollow shaft which is concentric runs to the first wave and encloses it. at In this embodiment, the two waves can be used independently of one another operated so that a pre-dispersion by the flow generating device is possible. For fine dispersion the outer hollow shaft is connected via a coupling the first shaft is engaged and rotates with the same Speed. Alternatively, it is possible to use the two waves to drive independently and with different Rotate speeds.

    In einer besonders vorteilhaften Weiterentwicklung der Mahlvorrichtung weist die Strömungserzeugungsvorrichtung Mittel zum Dispergieren auf, des weiteren ist die Mahlvorrichtung höhenverstellbar, wobei die Mahlvorrichtung mittels der Höhenverstellung in das Dispergiergut eintauchbar und wieder vollständig aus diesem entfernbar ist, während die Strömungserzeugungsvorrichtung im Dispergiergut verbleibt. Diese Ausgestaltung ermöglicht eine besonders einfache und wirtschaftliche Trennung der Vordispergierung durch die vorzugsweise als Dissolver ausgebildete Strömungserzeugungsvorrichtung und eine Feindispergierung durch die Mahlvorrichtung.In a particularly advantageous further development of the grinding device the flow generating device has means to disperse on, furthermore is the grinder height adjustable, the grinding device by means of the height adjustment immersed in the dispersed material and completely again is removable therefrom while the flow generating device remains in the dispersed material. This configuration enables a particularly simple and economical Separation of the predispersion by preferably as a dissolver trained flow generating device and a Fine dispersion through the grinder.

    Besonders gute Dispergierleistungen ergeben sich, und die Mahlvorrichtung ist besonders einfach zu reinigen, wenn diese derart ausgebildet ist, daß das Gehäuse der Mahlvorrichtung ein offenes Profil aufweist, das Rührwerkzeug durch eine zweite Welle antreibbar ist und über mindestens einen Verbindungssteg, der durch das offene Profil verläuft, mit der zweiten Welle verbunden ist und die zweite Welle eine Hohlwelle ist, die die erste Welle umschließt.There are particularly good dispersion performances, and the Grinder is particularly easy to clean if this is designed such that the housing of the grinding device has an open profile, the stirring tool by a second Shaft can be driven and via at least one connecting web, that runs through the open profile, with the second Shaft is connected and the second shaft is a hollow shaft, that surrounds the first wave.

    Die Erfindung ist aber auch bei derartigen Rührwerkskugelmühlen anwendbar, bei denen die Welle fest steht und das Rührwerk trägt und wobei das Gehäuse relativ zu dem Rührwerk drehbar ist. Eine derartige Rührwerkskugelmühle ist dann so ausgestaltet, daß die zweite Strömungserzeugungsvorrichtung einen flügelartigen Steg aufweist, der an dem Gehäuse vorgesehen ist und durch die Durchtrittsöffnung eine Strömung in das Innere des Gehäuses erzeugt.But the invention is also in such agitator ball mills applicable where the shaft is fixed and the agitator carries and wherein the housing rotatable relative to the agitator is. Such an agitator ball mill is then designed that the second flow generating device has a wing-like Has web, which is provided on the housing and a flow into the interior through the passage opening of the housing.

    Vorteilhafterweise weist die Strömungserzeugungsvorrichtung eine oder mehrere Stege auf, die an dem Gehäuse im Bereich der Durchtrittsöffnung ausgebildet sind.The flow generating device advantageously has one or more webs on the housing in the area of Passage opening are formed.

    Die erfindungsgemäße Dispergiervorrichtung ist in der Zeichnung beispielhaft veranschaulicht und nachstehend anhand der Figuren detailliert beschrieben. Es zeigen:

    Figur 1:
    eine Frontansicht im Schnitt der erfindungsgemäßen Dispergiervorrichtung,
    Figur 2:
    eine Seitenansicht im Schnitt der erfindungsgemäßen Rührscheibe mit darauf angeordnetem Flügelrad und die
    Fig.3-8:
    Draufsichten verschiedener Ausführungsformen des erfindungsgemäßen Flügelrads.
    The dispersing device according to the invention is exemplified in the drawing and described in detail below with reference to the figures. Show it:
    Figure 1:
    2 shows a front view in section of the dispersing device according to the invention,
    Figure 2:
    a side view in section of the stirring disc according to the invention with the impeller arranged thereon and the
    Fig.3-8:
    Top views of various embodiments of the impeller according to the invention.

    Wie Figur 1 zu entnehmen ist, besteht die erfindungsgemäße Dispergiervorrichtung im wesentlichen aus einem zylindrischen Behälter 1, einem Dissolver 2 und einer Rührwerkskugelmühle 3. In der Figur 1 ist nur der untere Abschnitt des Behälters 1 dargestellt.As can be seen in Figure 1, there is the invention Dispersing device consisting essentially of a cylindrical Container 1, a dissolver 2 and an agitator ball mill 3. 1 shows only the lower section of the container 1 shown.

    Der Dissolver besteht aus einer zylindrischen Welle 21, die an ihrem unteren Ende eine Dissolverscheibe 22 aufweist. Die Dissolverscheibe ist entlang ihres Umfangs mit mehreren, auf der Kreisfläche alternierend nach oben und nach unten gebogenen Zähnen 23 ausgestattet.The dissolver consists of a cylindrical shaft 21 which has a dissolver disk 22 at its lower end. The Dissolver disc is with several, along its circumference the circular surface alternately curved upwards and downwards Teeth 23 equipped.

    Die Rührwerkskugelmühle besteht vorzugsweise aus einem torusförmigen Gehäuse 31, in dem ein kreisringförmiger Ringkanal 32 ausgebildet ist. In dem Ringkanal 32 sind die Mahlkugeln 33 enthalten. Die Mahlkugeln 33 sind in der Zeichnung lediglich beispielhaft angedeutet. Üblicherweise ist der Ringkanal 32 mit Mahlkugeln 33 gefüllt. Das Gehäuse 31 ist an der zur Welle 21 gerichteten Seite mit einer ringsum laufenden Öffnung 34 versehen. Das Gehäuse 31 ist in dem dargestellten Beispiel doppelwandig ausgebildet, wobei zwischen den Wänden in dem darin ausgebildeten Spülraum 35, der ebenfalls kreisringförmig ausgebildet ist, ein Temperiermedium nach Belieben über die zum Absenken des Gehäuses 31 ausgebildeten Stangen 4 einspülbar ist. Zu diesem Zweck sind die Stangen 4 hohl ausgebildet und beinhalten einen Zuführkanal und einen Abführkanal für das Temperiermedium.The agitator ball mill preferably consists of a toroidal one Housing 31, in which an annular ring channel 32nd is trained. The grinding balls 33 are in the annular channel 32 contain. The grinding balls 33 are only in the drawing indicated as an example. The ring channel is usually 32 filled with grinding balls 33. The housing 31 is on the shaft 21 directed side with an all-round opening 34 Mistake. The housing 31 is in the example shown double-walled, being between the walls in the wash chamber 35 formed therein, which is also annular is formed over a tempering medium at will the rods 4 designed for lowering the housing 31 can be flushed in is. For this purpose, the rods 4 are hollow and include a feed channel and a discharge channel for the temperature control medium.

    Das Gehäuse ist an seinem in bezug auf die Figur 1 dargestelten unteren Ende mit einer siebartig perforierten Lochscheibe 25 verschlossen, die an das Gehäuse 31 angeschraubt ist. Durch diese Lochscheibe 25 strömt das Dispergiergut durch das Gehäuse 31; gleichzeitig verhindert die Lochscheibe 25, daß die Mahlkugeln 33 aus dem Ringkanal 32 herausfallen. Das Dispergiergut tritt durch die Durchtrittsöffnung zwischen dem Gehäuse 31 und der Welle in das Gehäuse 31 ein. Die Strömung des Dispergiergutes ist in diesem Bereich durch die gestrichelten Pfeile dargestellt.The housing is shown on its in relation to Figure 1 lower end with a perforated disc perforated like a sieve 25 closed, which is screwed to the housing 31. By this perforated disc 25 flows the dispersed material through the housing 31; at the same time, the perforated disk 25 prevents the Grinding balls 33 fall out of the ring channel 32. The dispersed material passes through the passage opening between the housing 31 and the shaft in the housing 31. The flow of the Dispersed goods are in this area by the dashed lines Arrows shown.

    An der Lochscheibe 25 ist eine zentrale Buchse 26 mittels Schrauben 27 befestigt. Diese Buchse 26 nimmt eine zylindrische Hülse 28 auf. Zwischen der Außenseite dieser Hülse 28 und der Innenseite der verbindungshülse 37 ist ein kreisringförmiges Gleitlager 29 angeordnet. Dieses Gleitlager 29 verhindert, daß die Mahlkugeln 33 unbeabsichtigt in den Spalt zwischen der Verbindungshülse 37 und der zylindrischen Hülse 28 eindringen können. Gleichzeitig wird durch das Gleitlager 29 eine Relativbewegung der beiden Teile zueinander ermöglicht.A central bushing 26 is attached to the perforated disk 25 Screws 27 attached. This socket 26 takes a cylindrical Sleeve 28 on. Between the outside of this sleeve 28 and the inside of the connecting sleeve 37 is an annular one Plain bearing 29 arranged. This slide bearing 29 prevents that the grinding balls 33 unintentionally in the gap between the Penetrating sleeve 37 and the cylindrical sleeve 28 can. At the same time, the slide bearing 29 causes a relative movement of the two parts to each other.

    Innerhalb des Ringkanals 32 befindet sich eine coaxial zu dem Ring verlaufende Kreisringscheibe 36, die über eine Verbindungshülse 37 mit einer Hohlwelle 38 in Verbindung steht, welche die Welle 21 umschließt. Die Welle 21 und die Hohlwelle 38 werden von einem nicht näher dargestellten Motor angetrieben.Within the ring channel 32 is a coaxial to that Ring running circular washer 36, which has a connecting sleeve 37 is connected to a hollow shaft 38, which surrounds the shaft 21. The shaft 21 and the hollow shaft 38 are driven by a motor, not shown.

    Die Welle 21 ist in der Verbindungshülse 37 im Verhältnis zu dieser drehbar gelagert. Die Lagerung erfolgt im vorliegenden Fall über ein weiteres zwischen der Innenseite der Verbindungshülse 37 und der Außenseite der Welle 21 angeordnetes Gleitlager 40. Dieses erlaubt gleichzeitig ein axial einfaches Verschieben des Gehäuses 31 mit der Hohlwelle 38 im Verhältnis zu der Welle 21 des Dissolvers 2.The shaft 21 is in the connecting sleeve 37 in relation to this rotatably mounted. The storage takes place in the present Fall over another between the inside of the connecting sleeve 37 and the outside of the shaft 21 arranged Slide bearing 40. This also allows an axially simple Moving the housing 31 with the hollow shaft 38 in relation to the shaft 21 of the dissolver 2.

    Die Verbindungshülse 37 weist einen umlaufenden stufenartigen Absatz 41 auf, auf dem ein Flügelrad 5 befestigt ist. Alternativ kann das Flügelrad 5 auch einteilig an der Verbindungshülse 37 oder der Kreisringscheibe 36 ausgebildet sein.The connecting sleeve 37 has a circumferential step-like Paragraph 41 on which an impeller 5 is attached. alternative can the impeller 5 also in one piece on the connecting sleeve 37 or the annular disc 36 may be formed.

    Das Flügelrad 5 besteht aus einer kreisringförmigen und scheibenförmigen Platte 50, auf der mehrere flügelartige Stege angeordnet sind, die sich im wesentlichen schräg zur Plattenebene in Richtung der Rotationsachse der Platte 50 erstrecken und in radial verlaufender Richtung von der Rotationsachse im wesentlichen schräg zu einer an dem äußeren Umfangsrand der Platte 50 angelegten Tangente verlaufen. Bei der Rotation des Flügelrads 5 mit der Verbindungshülse 37 erzeugt das Flügelrad eine Strömung durch das zentrale Loch des Gehäuses 31 in den Ringkanal 32 des Gehäuses 31.The impeller 5 consists of an annular and disc-shaped Plate 50 on which several wing-like webs are arranged, which are substantially oblique to the plate plane extend in the direction of the axis of rotation of the plate 50 and in the radial direction from the axis of rotation in substantially obliquely to one on the outer peripheral edge of the Plate 50 tangent run. When rotating the Impeller 5 with the connecting sleeve 37 produces the impeller a flow through the central hole of the housing 31 in the Annular channel 32 of the housing 31.

    Um diese Strömungswirkung zu erhöhen, ist an dem Gehäuse 31 im Bereich der Durchtrittsöffnung ein Pumpengehäuse 42 zur Aufnahme des Flügelrads 5 in dem Gehäuse 31 ausgebildet.To increase this flow effect, on the housing 31 in A pump housing 42 for receiving in the area of the passage opening of the impeller 5 is formed in the housing 31.

    Das Gehäuse weist zudem einen trichterförmigen Zulauf 43 auf, der an seinem Grund auf der dem Trichter abgewandten Seite mit dem Pumpengehäuse 42 für das Flügelrad 5 versehen ist.The housing also has a funnel-shaped inlet 43, the one at its bottom on the side facing away from the funnel the pump housing 42 is provided for the impeller 5.

    Das Pumpengehäuse 42 ist mit einer schräg verlaufenden Wand versehen, welche an die Schräge der Stege des Flügelrads angepaßt ist. Durch diese Ausgestaltung wird eine höhere Pumpenleistung bewerkstelligt, da das Pumpengehäuse 42 an jedem Punkt näher an den Stegen des Flügelrads gelegen ist. Der Spalt zwischen der Oberkante der Stege und der Wand des Pumpengehäuses ist derart bemessen, daß eine Mahlkugel 33 nicht zwischen diesen eingeklemmt werden kann.The pump housing 42 has an inclined wall provided which is adapted to the slope of the webs of the impeller is. This configuration results in a higher pump output accomplished since the pump housing 42 on each Point is closer to the webs of the impeller. The Gap between the top edge of the webs and the wall of the pump housing is dimensioned such that a grinding ball 33 is not can be pinched between them.

    Um das Eintreten von Mahlkugeln 33 während des Mahlprozesses zuverlässig zu verhindern, ist an dem äußeren Umfangsrand der zum Gehäuseinneren gerichteten Öffnung des Pumpengehäuses 42 eine umlaufende Nase 44 vorgesehen. Die Nase 44 ist vorliegend einteilig mit dem Gehäuse 31 ausgebildet und verhindert zuverlässig, daß die Mahlkugeln 33 seitlich in das Pumpengehäuse 42 eindringen können.To prevent grinding balls 33 from entering during the grinding process To prevent reliably is on the outer peripheral edge opening of the pump housing 42 directed towards the housing interior a circumferential nose 44 is provided. The nose 44 is present formed in one piece with the housing 31 and reliably prevents that the grinding balls 33 laterally in the pump housing 42 can penetrate.

    In der Figur 2 ist die Verbindungshülse 37 mit der an ihr befestigten Kreisringscheibe 36 ohne die restliche Apparatur dargestellt. Deutlich sind die auf der Innenseite der Verbindungshülse 37 gelegenen Ausnehmungen 45 und 46 ersichtlich, in die die Gleitlager 29 und 40 einsetzbar sind, so daß ein Axialverschieben der Gleitlager 29 und 40 verhindert wird. Alternativ kann die Verbindungshülse 37 einteilig mit der Kreisringscheibe 36 ausgebildet sein.In Figure 2, the connecting sleeve 37 with the on it attached circular disc 36 without the rest of the equipment shown. They are clear on the inside of the connecting sleeve 37 located recesses 45 and 46 can be seen in the slide bearings 29 and 40 can be used, so that an axial displacement the plain bearing 29 and 40 is prevented. alternative can the connecting sleeve 37 in one piece with the circular washer 36 be formed.

    Deutlich ist das Flügelrad 5 mit seiner Platte 50 und den darauf angeordneten Stegen 51 zu erkennen. Die Stege 51 sind derart ausgebildet, daß sie nicht bis zum inneren Rand der Platte 50 verlaufen. Durch diese Ausgestaltung kann das Dispergiergut besser durch die Durchtrittsöffnung in den Ringkanal 32 des Gehäuses 31 einströmen. Diese Strömung ist in der Figur 1 durch Pfeile dargestellt.The impeller 5 with its plate 50 and the webs 51 arranged thereon can be seen. The webs 51 are trained so that they do not reach the inner edge of the Plate 50 run. This configuration allows the dispersed material better through the passage opening in the ring channel 32 flow into the housing 31. This current is in the Figure 1 represented by arrows.

    Die kompakte Anordnung von Kreisringscheibe 36, Gleitlagern 29 und 40 und Flügelrad 5 ermöglicht ein besonders effizientes Auswechseln der verschleißanfälligen Teile.The compact arrangement of circular washer 36, slide bearings 29 and 40 and impeller 5 enables a particularly efficient Replace the parts that are susceptible to wear.

    In der Figur 3 ist das Flügelrad 5 in der Draufsicht dargestellt. Deutlich ist die kreisringförmige Platte 50 sichtbar, von der sich die flügelartigen Stege 51 in Betrachtungsrichtung der Figur 3 erheben. Die Stege 51 verlaufen im wesentlichen schräg zu einer an dem äußeren Umfangsrand der Platte 50 angelegten Tangente 52 und sind im wesentlichen sichelförmig ausgebildet. Diese Ausgestaltung ermöglicht eine besonders hohe Pumpenleistung und bewerkstelligt gleichzeitig eine lükkenlose Deflektion der von der Außenseite an das Flügelrad 5 heranströmenden Mahlkugeln 33. Das Dispergiergut strömt während des Betriebs in der Dispergiervorrichtung in Betrachtungsrichtung in die innere Durchtrittsöffnung ein und wird durch die Rotation durch die zwischen den Stegen 51 ausgebildeten Kanäle 53 in Richtung des äußeren Umfangsrandes des Flügelrads 5 befördert. Durch die sichelförmige Ausgestaltung der Stege 51 wird das Dispergiergut zusätzlich beschleunigt.In Figure 3, the impeller 5 is shown in plan view. The circular plate 50 is clearly visible, from which the wing-like webs 51 in the viewing direction of Figure 3 raise. The webs 51 run essentially obliquely to one on the outer peripheral edge of the plate 50 applied tangent 52 and are substantially sickle-shaped educated. This configuration enables a particularly high pump output and at the same time manages a gapless Deflection of the outside of the impeller 5 approaching grinding balls 33. The dispersed material flows during the operation in the dispersing device in the viewing direction into the inner opening and will by the rotation by those formed between the webs 51 Channels 53 in the direction of the outer peripheral edge of the Impeller 5 promoted. Due to the crescent shape the web 51 the dispersed material is additionally accelerated.

    In der Figur 4 ist eine alternative Ausführungsform eines Flügelrads 6 ebenfalls in der Draufsicht dargestellt. Bei dieser Ausgestaltung sind die Stege 61 schmaler ausgebildet als die des Flügelrads gemäß Figur 3, so daß die Kanäle 62 zwischen den Stegen breiter sind. Ein derartiges Flügelrad 6 ist beispielsweise für höher viskose Dispergiergüter einsetzbar. 4 shows an alternative embodiment of a Impeller 6 also shown in plan view. at In this embodiment, the webs 61 are made narrower than that of the impeller according to FIG. 3, so that the channels 62 between the webs are wider. Such an impeller 6 can be used, for example, for more viscous dispersed goods.

    Die Figur 5 stellt eine weitere Ausführungsform des Flügelrads 7 in der Draufsicht dar. Bei dieser Ausgestaltung erstrecken sich die Stege 70 bis zum Innenrand 71 der Kreisringscheibe. Diese Ausgestaltung gewährleistet, daß jegliches Dispergiergut im zentralen Bereich durch die Stege 70 wegbefördert wird. Allgemein ist das Flügelrad viskositätsabhängig austauschbar.FIG. 5 shows a further embodiment of the impeller 7 in plan view. In this embodiment, extend the webs 70 up to the inner edge 71 of the circular disk. This configuration ensures that any dispersed material is carried away in the central area by the webs 70. In general, the impeller can be replaced depending on the viscosity.

    Die Figur 6 hingegen, in der ebenfalls eine alternative Ausgestaltung eines Flügelrads 8 in der Draufsicht abgebildet ist, zeigt ein Flügelrad 8 mit sehr schmalen Stegen 80, die sich nicht bis zum Innenrand 81 des Flügelrads 8 erstrecken.6, however, in which also an alternative embodiment an impeller 8 is shown in plan view, shows an impeller 8 with very narrow webs 80, which are do not extend to the inner edge 81 of the impeller 8.

    In der Figur 7 ist eine weitere Ausführungsform des erfindungsgemäßen Flügelrads in der Draufsicht dargestellt. Das Flügelrad 9 ist auf der kreisringförmigen Platte 90 mit Stegen 91 versehen, die im wesentlichen gem. den zuvor beschriebenen Stegen auf den anderen Flügelrädern 5 - 7 ausgebildet sind. Im Unterschied zu diesen sind die Stege 91 darüber hinaus am äußeren Umfangsrand 92 mit entlang diesem Umfangsrand verlaufenden Fortsätzen 93 versehen. In der Draufsicht sehen die Stege 91 wie ein Hockey-Schläger aus. Die Fortsätze 93 der Stege lenken das Dispergiergut nochmals um und bewirken eine verstärkte Verwirbelung und verbesserte Durchmischung des Dispergierguts. Darüber hinaus wird durch die äußeren Fortsätze eine besonders sichere Deflektion der eventuell in das Pumpengehäuse 42 eintretenden Mahlkugeln 33 erreicht.FIG. 7 shows a further embodiment of the invention Impeller shown in plan view. The Impeller 9 is on the annular plate 90 with webs 91 provided, which essentially according to. the previously described Webs are formed on the other impellers 5-7. in the Difference from these are the webs 91 on outer peripheral edge 92 with extending along this peripheral edge Provided extensions 93. In the top view they see Get out 91 like a hockey stick. The extensions 93 of the Ridges redirect the dispersed material and cause one increased turbulence and improved mixing of the To be dispersed. In addition, through the outer extensions a particularly safe deflection of the possibly in the Pump housing 42 reached grinding balls 33 reached.

    Die Figur 8 zeigt schließlich eine alternative Ausführungsform des erfindungsgemäßen Flügelrads, bei welchem auf der Platte 94 ein einziger, schneckenartig vom Innenrand zum äußeren Umfangsrand verlaufender Steg 95 vorgesehen ist. Finally, FIG. 8 shows an alternative embodiment of the impeller according to the invention, in which on the plate 94 a single, helical from the inner edge to the outer Web 95 running circumferential edge is provided.

    BezugszeichenlisteLIST OF REFERENCE NUMBERS

    11
    Behältercontainer
    22
    Dissolverdissolver
    33
    Rührwerkskugelmühlestirred ball mill
    44
    Stangepole
    55
    Flügelradimpeller
    66
    Flügelradimpeller
    77
    Flügelradimpeller
    88th
    Flügelradimpeller
    2121
    Wellewave
    2222
    Dissolverscheibedissolver disk
    2323
    Zähneteeth
    2525
    Lochscheibeperforated disc
    2626
    BuchseRifle
    2727
    Schraubescrew
    2828
    Hülseshell
    2929
    Gleitlagerbearings
    3131
    Gehäusecasing
    3232
    Ringkanalannular channel
    3333
    Mahlkugelgrinding ball
    3434
    Öffnungopening
    3535
    SpülraumWash cabinet
    3636
    KreisringscheibeAnnular disk
    3737
    Verbindungshülseconnecting sleeve
    3838
    Hohlwellehollow shaft
    4040
    Gleitlagerbearings
    4141
    Absatzparagraph
    4242
    Pumpengehäusepump housing
    4343
    ZulaufIntake
    4444
    Nasenose
    4545
    Ausnehmungrecess
    4646
    Ausnehmungrecess
    5050
    Platteplate
    5151
    Stegweb
    5252
    Tangentetangent
    5353
    Kanal channel
    6161
    Stegweb
    6262
    Kanalchannel
    7070
    Stegweb
    7171
    Innenrandinner edge
    8080
    Stegweb
    8181
    Innenrandinner edge
    9090
    Platteplate
    9191
    Stegweb
    9292
    Umfangsrandcircumferential edge
    9393
    Fortsatzextension
    9494
    Platteplate
    9595
    Stegweb

    Claims (11)

    1. Dispersing device, especially a ball or bead mill useable as submersible mill, having a container (1) for receiving and processing a material to be dispersed, a grinding device having a housing (31) containing grinding bodies, which housing has openings for passage of the material to be dispersed, a stirring apparatus arranged in the housing (31) and a first flow-generating device, wherein the housing (31) and the stirring apparatus are movable relative to one another and at least one shaft extends into the housing (31) through a through-opening, through which the material to be dispersed is able to enter the housing (31), wherein in the housing (31), in the region of the through-opening, a second flow-generating device is arranged between the shaft (21) and the housing (31), characterised in that the second flow-generating device is in the form of an impeller (5), which device during operation conveys the material to be dispersed through the through-opening in the container (1) into the housing (31), and in that the housing (31) in the region of the through-opening is in the form of a half-shell pump housing (42) for receiving the impeller (5, 6, 7, 8) in order to prevent the escape of the grinding body, and in that the vanes of the impeller (5) are oriented towards the housing wall.
    2. A grinding device according to claim 1, characterised in that the housing (31) comprises a funnel-shaped inlet (43), which at its base on the side remote from the inlet (43) comprises the pump housing (42).
    3. A grinding device according to claim 1 or 3,characterised in that a circumferential projection (44) is provided at the outer circumferential edge of the opening of the pump housing (42) directed towards the interior of the housing.
    4. A grinding device according to any one of claims 1 to 3, characterised in that the impeller (5, 6, 7, 8) is provided with a disc-shaped plate (50, 90), on which at least one vane-like member (51, 61, 70, 80, 91) is arranged, which member extends substantially obliquely to the plane of the plate in the direction of the axis of rotation of the plate (50, 90) and in the radially running direction runs on the plate (50, 90) substantially obliquely to a tangent located at the outer circumferential edge of the plate (50, 90).
    5. A grinding device according to claim 4, characterised in that the impeller (5, 6, 7, 8) comprises several members (51, 61, 70, 80, 91).
    6. A grinding device according to claim 4 or 5, characterised in that the member (51, 61, 70, 80, 91) is of sickle-shaped construction in its lengthwise direction.
    7. A grinding device according to any one of claims 1 to 6, characterised in that the stirring apparatus comprises a circular ring disc (36), which is provided with a circumferential step-like shoulder (41) on which the plate (50, 90) of the impeller (5, 6, 7, 8) is arranged.
    8. A grinding device according to any one of claims 1 to 7, characterised in that the stirring apparatus is arranged to be driven by a further shaft.
    9. A grinding device according to any one of claims 1 to 8, characterised in that the first flow-generating device comprises means for dispersal, in that the grinding device is height-adjustable and in that by means of the height adjustment the grinding device is immersible into and completely removable again from the material to be dispersed, whilst the flow-generating device remains in the material to be dispersed.
    10. A grinding device according to claim 1, wherein the shaft is fixed and carries the stirring apparatus and wherein the housing is rotatable relative to the stirring apparatus, characterised in that the second flow-generating device comprises a vane-like member which is provided on the housing (31) and generates a flow through the through-opening into the interior of the housing (31).
    11. A grinding device according to claim 11, characterised in that the flow-generating device comprises several members, which are constructed integral with the housing in the region of the through-opening.
    EP99957911A 1998-11-02 1999-10-19 Dispersing device Expired - Lifetime EP1126908B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE29819508U DE29819508U1 (en) 1998-11-02 1998-11-02 Dispersing device
    DE29819508U 1998-11-02
    PCT/DE1999/003345 WO2000025905A1 (en) 1998-11-02 1999-10-19 Dispersing device

    Publications (2)

    Publication Number Publication Date
    EP1126908A1 EP1126908A1 (en) 2001-08-29
    EP1126908B1 true EP1126908B1 (en) 2003-01-02

    Family

    ID=8064726

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99957911A Expired - Lifetime EP1126908B1 (en) 1998-11-02 1999-10-19 Dispersing device

    Country Status (8)

    Country Link
    US (1) US6565024B2 (en)
    EP (1) EP1126908B1 (en)
    JP (1) JP4508424B2 (en)
    AT (1) ATE230298T1 (en)
    AU (1) AU1547700A (en)
    DE (3) DE29819508U1 (en)
    ES (1) ES2189519T3 (en)
    WO (1) WO2000025905A1 (en)

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    Also Published As

    Publication number Publication date
    DE59903933D1 (en) 2003-02-06
    JP4508424B2 (en) 2010-07-21
    DE19982210D2 (en) 2001-09-27
    US20020003180A1 (en) 2002-01-10
    ES2189519T3 (en) 2003-07-01
    AU1547700A (en) 2000-05-22
    JP2002528258A (en) 2002-09-03
    EP1126908A1 (en) 2001-08-29
    WO2000025905A1 (en) 2000-05-11
    DE29819508U1 (en) 1999-01-14
    ATE230298T1 (en) 2003-01-15
    US6565024B2 (en) 2003-05-20

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