EP0304604A2 - Mixer with stirrer and grinder - Google Patents

Mixer with stirrer and grinder Download PDF

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Publication number
EP0304604A2
EP0304604A2 EP88111308A EP88111308A EP0304604A2 EP 0304604 A2 EP0304604 A2 EP 0304604A2 EP 88111308 A EP88111308 A EP 88111308A EP 88111308 A EP88111308 A EP 88111308A EP 0304604 A2 EP0304604 A2 EP 0304604A2
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EP
European Patent Office
Prior art keywords
mixer according
stator
rotor
teeth
shear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88111308A
Other languages
German (de)
French (fr)
Other versions
EP0304604A3 (en
EP0304604B1 (en
Inventor
Manfred Dipl.-Ing. Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Loedige Maschinenbau GmbH
Original Assignee
Gebrueder Loedige Maschinenbau GmbH
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Publication date
Application filed by Gebrueder Loedige Maschinenbau GmbH filed Critical Gebrueder Loedige Maschinenbau GmbH
Priority to AT88111308T priority Critical patent/ATE92364T1/en
Publication of EP0304604A2 publication Critical patent/EP0304604A2/en
Publication of EP0304604A3 publication Critical patent/EP0304604A3/en
Application granted granted Critical
Publication of EP0304604B1 publication Critical patent/EP0304604B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/833—Devices with several tools rotating about different axis in the same receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/02—Maintaining the aggregation state of the mixed materials
    • B01F23/023—Preventing sedimentation, conglomeration or agglomeration of solid ingredients during or after mixing by maintaining mixed ingredients in movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking

Definitions

  • the invention relates to a mixer which has, for example, a cylindrical container, a mixer arranged in the container and having a rotatably mounted shaft and mixing tools attached to radial arms, and at least one shredder mounted in the container wall, the shredding elements of the shredder being at such a distance of the container wall are arranged so that the mixing tools of the mixing mechanism can be moved between the container wall and the shredder and, accordingly, the tools and shredders do not interfere with each other, but complement their mode of operation.
  • the mixing tools are, for example, ploughshare-like, while the shredders are so-called knife heads which have straight or goblet-shaped knives one above the other in one or more planes, the shape and length of which are such that they are adapted to the plowshare-like mixing tools Envelopes are made so that the envelopes swept by the mixing tools and the envelopes of the shredders are closely matched to one another without overlapping, so that the parts cannot touch one another.
  • the invention has for its object to improve a mixer of the type mentioned in such a way that the disintegration of the mixed materials or the components thereof caused by the shredders is improved by a shear effect.
  • the invention provides a mixer which exerts a targeted shearing action on the mix which is fed to the shredders by the preferably ploughshare-like mixing tools.
  • the shredders have shear wreaths, which have a shearing and thus particularly advantageously shredding effect on the mixture, so that clumping is effectively avoided and any clumps that are formed are quickly and effectively dissolved.
  • the one shear ring of each shredder is preferably designed as a rotor and the other shear ring as a stator, so that only one of the two parts of the shear rings needs to be driven and thus moved.
  • the drive energy required can be kept low, while on the other hand the effort for storing the rotatable parts of the shredder is not unnecessarily high.
  • the mixer shown in the drawing has a fixed, i.e. a non-rotatably arranged cylindrical container (1) with flat end walls (2 and 3).
  • a shaft (4) extends through this container (1) in the axial direction and is rotatably mounted in bearings (5 and 6).
  • Ploughshare-like mixing tools (8) are attached to the shaft (4) on radial arms (7), which are located near the inner wall of the cylindrical container (1) and rotate in the direction of an arrow (9) in the container (1) when the shaft is from a motor, not shown, is driven.
  • the arms (7) of the ploughshare-like mixing tools (8) are staggered both circumferentially and in the axial direction, so that the mixed material caught by the ploughshare-like mixing tools (8) is tossed back and forth and thereby intensely swirled and thus mixed.
  • a shredder 10 is provided in the central area, which projects laterally into the container (1).
  • This shredder consists of a stator (11) and a rotor (12) which have shear rings (13 and 14) which are concentric with one another.
  • the stator (11) is arranged on a pipe section (15) which is fastened to the container (1) by means of a sleeve (16) fastened on the outside.
  • a spoke (17) is fastened, namely welded in the present case, which carries the shear ring (13) of the stator (11).
  • the shear ring (13) of the stator (11) has a number of radial slots (18) which extend over the part of the shear ring (13) which lies outside the spoke (17) and which are relatively narrow, so that between the rectangular or square slots (18) in plan view are relatively wide shear teeth (19) compared to these slots, as can be seen in particular in FIGS. 2 and 3.
  • the rotor (12) arranged concentrically within the stator is fastened to a shaft (20) which extends through the pipe section (15) and the wall of the container (1) and is driven in the direction of an arrow (21) by a motor (not shown) can be.
  • a motor not shown
  • the bearing of the shaft (20) is not shown in detail.
  • a spoke (22) is rotatably attached, which carries the shear ring (14) of the rotor (12).
  • This shear ring (14) contains relatively wide grooves (23), between which there are shear teeth (24).
  • the grooves (23) are not only wider than the practically radial grooves (18) of the outer shear ring (13), but also do not run radially, but at an angle or on a spiral path, so that both the grooves (23) and the shaving tools (24) in between have a trapezoidal layout.
  • the individual shear teeth (24) are thus equipped with a knife-shaped shear edge (25) which is located at the leading end of the shear ring (14) of the rotor (12) and with the inside of the teeth (19) of the fixed shear ring (13) of the stator interact in the grooves (18) between them and thus produce the desired shear effect when the rotor is driven.
  • the container (1) is provided at one end with a nozzle (26) serving as an inlet and at the opposite end with a nozzle (27) serving as an outlet.
  • a nozzle (26) serving as an inlet
  • a nozzle (27) serving as an outlet.
  • These sockets can be provided with connections or closures.
  • the mixer is for designed for continuous operation, but it can also be used in batch operation.
  • the teeth (19, 24) of the shear rings (13, 14) of the stator (11) and rotor (12) have a trapezoidal or angular cross-section and on the mutually facing sides of the shear rings with interacting cutting edges (25 ) are provided, the teeth can also have a different cross-section, for example a circular, oval, square or rectangular cross-section.
  • the shredder (10) can be understood as a type of turbo-mill, which disintegrates the material to be mixed in the cylindrical container (1), which is arranged with a horizontal longitudinal axis or lying horizontally.
  • the radial openings (18) between the teeth (19 or 24) of the stator (11) and / or rotor (12) preferably have a width between approximately 3 to 10 mm. Such dimensioning ensures safe and gentle disintegration of the mixed materials to be processed. In individual cases, however, the gap widths can also be smaller or larger.
  • the radial arms (22) of the rotor (12) can be designed in an interlaced manner, which brings about a targeted conveying effect in the area of the stator (11) and rotor (12).
  • the gap between the stator (11) and the rotor (12) can be of different widths and widths and is preferably in the range from 1 to 5 mm. A good and satisfactory interaction of the teeth of the rotor and stator is guaranteed in this gap area.
  • stator (11) and the rotor (12) are made of particularly hard material, it being sufficient under certain circumstances to provide the surfaces of the stator and rotor which are particularly subject to wear with a hard material coating.
  • the stator (11) is fastened on two pieces of pipe which are used to add liquid to the area from the outside of the stator (11) and rotor (12) are designed and can be used if the mixture in the container (1) is to be supplied with liquid during processing or is to be moistened in the process.
  • the two pipe sections can be arranged concentrically to one another, so that the liquid can be introduced into the gap between these two pipe sections having different diameters.
  • the shear gap between the stator (11) and the rotor (12) can be designed to be slightly eccentric, that is to say the rotor (12) is arranged or mounted eccentrically in the stator (11). This gives a pulsating disintegration and grinding effect between the two interacting organs (11, 12) of the shredder (10).
  • the shredder (10) which can be referred to as a disintegrating and grinding element or also as a turbo-mill, is preferably arranged in the lateral to lower region of the container (1). It lies in the range from 0 to 180 ° and preferably in a range between 20 and 160 ° to the vertical through the horizontal longitudinal axis of the container (1) or to the horizontally arranged shaft (4) of the mixer located in the container (1).

Abstract

Mixing apparatus comprises a container which may be in the form of a hollow cylinder with its axis horizontal. It contains mixing means mounted to rotate within the container about its axis and in addition a pulveriser mounted in the cylindrical wall of the container. Whereas in known mixers of this kind the additional pulveriser comprises so-called knife heads which do not in every case grind down sufficiently rapidly and uniformly the material to be treated, in the mixer now proposed the grinding of the material is improved by the addition of a shearing effect. The pulveriser comprises two concentrically arranged relatively rotatable shearing rings and is in a position to disintegrate even materials which are difficult to treat, such as damp materials, rapidly and at the same time efficiently. Fluid can also be added in the region of the pulveriser without the material being caused to form into lumps.

Description

Die Erfindung betrifft einen Mischer, der einen beispielsweise zylinder­förmigen Behälter, ein im Behälter angeordnetes, eine drehbar gelagerte Welle und daran an radialen Armen befestigte Mischwerkzeuge aufweisendes Mischwerk und wenigstens einen in der Behälterwand gelagerten Zerkleinerer hat, wobei die Zerkleinerungselemente des Zerkleinerers in einem der­artigen Abstand von der Behälterwand angeordnet sind, daß die Mischwerk­zeuge des Mischwerkes zwischen der Behälterwand und dem Zerkleiner hin­durchbewegt werden können und sich dementsprechend die Werkzeuge und Zerkleinerer nicht gegenseitig behindern, sondern in ihrer Wirkungsweise ergänzen.The invention relates to a mixer which has, for example, a cylindrical container, a mixer arranged in the container and having a rotatably mounted shaft and mixing tools attached to radial arms, and at least one shredder mounted in the container wall, the shredding elements of the shredder being at such a distance of the container wall are arranged so that the mixing tools of the mixing mechanism can be moved between the container wall and the shredder and, accordingly, the tools and shredders do not interfere with each other, but complement their mode of operation.

Bei bekannten Mischern dieser Gattung sind die Mischwerkzeuge beispiels­weise pflugscharartig ausgebildet, während die Zerkleinerer sogenannte Messerköpfe sind, die in einer oder mehreren Ebenen übereinander gerad­linige oder kelchförmig gebogene Messer aufweisen, deren Form und Länge derart ist, daß eine Anpassung an die von den pflugscharartigen Mischwerk­zeugen überstrichenen Hüllkurven erfolgt, damit die von den Mischwerkzeugen überstrichenen Hüllkurven und die Hüllkurven der Zerkleinerer einander eng angepaßt sind, ohne sich zu überschneiden, so daß die Teile sich nicht gegenseitig berühren können.In known mixers of this type, the mixing tools are, for example, ploughshare-like, while the shredders are so-called knife heads which have straight or goblet-shaped knives one above the other in one or more planes, the shape and length of which are such that they are adapted to the plowshare-like mixing tools Envelopes are made so that the envelopes swept by the mixing tools and the envelopes of the shredders are closely matched to one another without overlapping, so that the parts cannot touch one another.

Obwohl mit derartigen Mischern bei vielen Mischgütern hervorragende Misch­ergebnisse bei gleichzeitiger Aufschließung von zur Klumpenbildung neigenden Mischgütern erzielt werden können, sind sie bei gewissen An­wendungsfällen nicht vollständig zufriedenstellend, da die Messer der Zerkleinerer frei umlaufen und das von ihnen bearbeitete Mischgut nicht ausreichend gegen die Messer gedrückt wird, so daß sich beim Zerkleinern keine Scherwirkung ergibt. Eine Scherwirkung ist jedoch insbesondere dann erwünscht, wenn Klumpenbildung im Mischgut auftritt, beispielsweise beim Vermischen und Trocknen extrem feuchter Mischgüter oder beim Ver­mischen von trockenen Mischgütern mit feuchten oder sogar fließfähigen anderen Mischgütern.Although with such mixers excellent mixing results can be achieved with many mixes with simultaneous disintegration of mixes that tend to form lumps, they are not completely satisfactory in certain applications, since the knives of the shredders rotate freely and the mix they are processing is not sufficiently pressed against the knives , so that there is no shear effect when crushing. However, a shear effect is particularly desirable when lumps form in the mix, for example when mixing and drying extremely moist mixes or when mixing dry mixes with moist or even flowable other mixes.

Der Erfindung liegt die Aufgabe zugrunde, einen Mischer der eingangs genannten Gattung derart zu verbessern, daß das von den Zerkleinerern bewirkte Aufschließen der Mischgüter bzw. der Komponenten derselben durch einen Schereffekt verbessert wird.The invention has for its object to improve a mixer of the type mentioned in such a way that the disintegration of the mixed materials or the components thereof caused by the shredders is improved by a shear effect.

Diese Aufgabe wird bei einem Mischer der eingangs genannten Gattung mit den Merkmalen des kennzeichnenden Teiles des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteran­sprüche.This object is achieved in a mixer of the type mentioned at the outset with the features of the characterizing part of patent claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Durch die Erfindung wird ein Mischer geschaffen, der eine gezielte Scher­wirkung auf das Mischgut ausübt, welches von den vorzugsweise pflugschar­artigen Mischwerkzeugen den Zerkleinerern zugeführt wird. Die Zerkleinerer haben Scherkränze, die scherend und damit in besonders vorteilhafter Weise zerkleinernd auf das Mischgut einwirken, so daß Klumpenbildung wirksam vermieden wird und eventuell trotzdem gedildete Klumpen schnell und wirksam aufgelöst werden.The invention provides a mixer which exerts a targeted shearing action on the mix which is fed to the shredders by the preferably ploughshare-like mixing tools. The shredders have shear wreaths, which have a shearing and thus particularly advantageously shredding effect on the mixture, so that clumping is effectively avoided and any clumps that are formed are quickly and effectively dissolved.

Vorzugsweise ist der eine Scherkranz jedes Zerkleinerers als Rotor und der andere Scherkranz als Stator ausgebildet, so daß nur einer der beiden Teile der Scherkränze angetrieben und damit bewegt zu werden braucht. Dadurch kann die benötigte Antriebsenergie niedrig gehalten werden, während andererseits auch der Aufwand für die Lagerung der drehbaren Teile des Zerkleinerers nicht unnötig hoch wird.The one shear ring of each shredder is preferably designed as a rotor and the other shear ring as a stator, so that only one of the two parts of the shear rings needs to be driven and thus moved. As a result, the drive energy required can be kept low, while on the other hand the effort for storing the rotatable parts of the shredder is not unnecessarily high.

In der Zeichnung ist ein Ausführungsbeispiel eines erfindungsgemäßen Mischers schematisch dargestellt, und zwar zeigt

  • Fig. 1 einen Querschnitt des Mischers in Höhe eines in diesen einge­bauten Zerkleinerers,
  • Fig. 2 einen Längsschnitt des Mischers nach Linie II-II aus Fig. 1 und
  • Fig. 3 eine Seitenansicht des in den Mischer aus Fig. 1 und 2 einge­bauten Zerkleinerers.
In the drawing, an embodiment of a mixer according to the invention is shown schematically, namely shows
  • 1 shows a cross section of the mixer at the level of a shredder installed in it,
  • Fig. 2 shows a longitudinal section of the mixer according to line II-II of Fig. 1 and
  • Fig. 3 is a side view of the shredder installed in the mixer of Fig. 1 and 2.

Der in der Zeichnung dargestellte Mischer hat einen feststehenden, d.h. einen nicht drehbar angeordneten zylindrischen Behälter (1) mit flachen Stirnwänden (2 und 3). Durch diesen Behälter (1) erstreckt sich in axialer Richtung eine Welle (4), die in Lagern (5 und 6) drehbar gelagert ist.The mixer shown in the drawing has a fixed, i.e. a non-rotatably arranged cylindrical container (1) with flat end walls (2 and 3). A shaft (4) extends through this container (1) in the axial direction and is rotatably mounted in bearings (5 and 6).

An der Welle (4) sind an radialen Armen (7) pflugscharartige Mischwerk­zeuge (8) befestigt, welche nahe der Innenwand des zylinderförmgen Be­hälters (1) liegen und in Richtung eines Pfeiles (9) im Behälter (1) umlaufen, wenn die Welle von einem nicht dargestellten Motor angetrieben wird.Ploughshare-like mixing tools (8) are attached to the shaft (4) on radial arms (7), which are located near the inner wall of the cylindrical container (1) and rotate in the direction of an arrow (9) in the container (1) when the shaft is from a motor, not shown, is driven.

Die Arme (7) der pflugscharartigen Mischwerkzeuge (8) sind sowohl um­fangsmäßig als auch in axialer Richtung gegeneinander versetzt angeordnet, so daß das von den pflugscharartigen Mischwerkzeugen (8) erfaßte Mischgut hin- und hergeworfen und dabei intensiv durchwirbelt und somit durch­mischt wird.The arms (7) of the ploughshare-like mixing tools (8) are staggered both circumferentially and in the axial direction, so that the mixed material caught by the ploughshare-like mixing tools (8) is tossed back and forth and thereby intensely swirled and thus mixed.

Bei dem dargestellten Mischer ist im mittleren Bereich ein Zerkleinerer (10) vorgesehen, der seitlich in den Behälter (1) hineinragt. Dieser Zerkleinerer besteht aus einem Stator (11) und einem Rotor (12), welche zueinander konzentrische Scherkränze (13 und 14) aufweisen.In the mixer shown, a shredder (10) is provided in the central area, which projects laterally into the container (1). This shredder consists of a stator (11) and a rotor (12) which have shear rings (13 and 14) which are concentric with one another.

Der Stator (11) ist an einem Rohrstück (15) angeordnet, welches am Behäl­ter (1) befestigt ist, und zwar mittels einer auf der Außenseite be­festigten Muffe (16). Am innerhalb des Behälters (1) befindlichen Ende des Rohrstückes (15) ist eine Speiche (17) befestigt, nämlich im vor­liegenden Falle festgeschweißt, welche den Scherkranz (13) des Stators (11) trägt.The stator (11) is arranged on a pipe section (15) which is fastened to the container (1) by means of a sleeve (16) fastened on the outside. At the end of the pipe section (15) located within the container (1), a spoke (17) is fastened, namely welded in the present case, which carries the shear ring (13) of the stator (11).

Der Scherkranz (13) des Stators (11) weist eine Anzahl radialer Schlitze (18) auf, die sich über den Teil des Scherkranzes (13) erstrecken, der außerhalb der Speiche (17) liegt, und die verhältnismäßig schmal sind, so daß zwischen den in Draufsicht rechteckigen oder quadratischen Schlitzen (18) sich gegenüber diesen Schlitzen verhältnismäßig breite Scherzähne (19) befinden, wie insbesondere Fig. 2 und 3 erkennen lassen.The shear ring (13) of the stator (11) has a number of radial slots (18) which extend over the part of the shear ring (13) which lies outside the spoke (17) and which are relatively narrow, so that between the rectangular or square slots (18) in plan view are relatively wide shear teeth (19) compared to these slots, as can be seen in particular in FIGS. 2 and 3.

Der konzentrisch innerhalb des Stators angeordnete Rotor (12) ist an einer Welle (20) befestigt, die sich durch das Rohrstück (15) und die Wand des Behälters (1) erstreckt und in Richtung eines Pfeiles (21) von einem nicht dargestellten Motor angetrieben werden kann. In der Zeichnung ist auch die Lagerung der Welle (20) nicht im einzelnen dargestellt.The rotor (12) arranged concentrically within the stator is fastened to a shaft (20) which extends through the pipe section (15) and the wall of the container (1) and is driven in the direction of an arrow (21) by a motor (not shown) can be. In the drawing, the bearing of the shaft (20) is not shown in detail.

Am im Behälter (1) befindlichen Ende der Welle (20) ist eine Speiche (22) drehfest angebracht, welche den Scherkranz (14) des Rotors (12) trägt. Dieser Scherkranz (14) enthält verhältnismäßig breit ausgebildete Nuten (23), zwischen denen sich Scherzähne (24) befinden. Die Nuten (23) sind nicht nur breiter als die praktisch radial verlaufenden Nuten (18) des äußeren Scherkranzes (13), sondern verlaufen auch nicht radial, sondern schräg bzw. auf einer spiralförmigen Bahn, so daß sowohl die Nuten (23) als auch die dazwischen befindlichen Scherwerkzeuge (24) einen trapezoiden Grundriß haben. Somit sind die einzelnen Scherzähne (24) mit einer messer­förmigen Scherkante (25) ausgestattet, welche sich am vorlaufenden Ende des Scherkranzes (14) des Rotors (12) befindet und mit den Innenseiten der Zähne (19) des feststehenden Scherkranzes (13) des Stators in den dazwischen befindlichen Nuten (18) zusammenwirken und somit den gewün­schten Schereffekt erzeugen, wenn der Rotor angetrieben ist.At the end of the shaft (20) located in the container (1), a spoke (22) is rotatably attached, which carries the shear ring (14) of the rotor (12). This shear ring (14) contains relatively wide grooves (23), between which there are shear teeth (24). The grooves (23) are not only wider than the practically radial grooves (18) of the outer shear ring (13), but also do not run radially, but at an angle or on a spiral path, so that both the grooves (23) and the shaving tools (24) in between have a trapezoidal layout. The individual shear teeth (24) are thus equipped with a knife-shaped shear edge (25) which is located at the leading end of the shear ring (14) of the rotor (12) and with the inside of the teeth (19) of the fixed shear ring (13) of the stator interact in the grooves (18) between them and thus produce the desired shear effect when the rotor is driven.

Insbesondere aus Fig. 1 ist erkennbar, daß die pflurscharartigen Misch­werkzeuge (8) zwischen der Innenwand des Behälters (1) und dem Stator (11) bzw. der Speiche (17) desselben hindurchlaufen können, so daß sie das im Behälter (1) befindliche Mischgut dem Zerkleinerer (10) von allen Seiten zuwerfen. Somit ist gewährleistet, daß das Mischgut auch in den Bereich des Zerkleinerers (1) gelangt und dort in der gewünschten Weise vom Zerkleinerer bearbeitet wird, um Klumpen aufzuschließen und ein gleichförmiges Mischergebnis bzw. Mischgut zu erhalten. Dieser Mischer ist daher besonders für die Bearbeitung von zur Klumpenbildung neigendem Mischgut geeignet, beispielsweise feuchtem Mischgut.In particular, from Fig. 1 it can be seen that the coulter-like mixing tools (8) between the inner wall of the container (1) and the stator (11) or the spoke (17) can run through it, so that they are in the container (1) Throw the mix into the shredder (10) from all sides. This ensures that the mix also reaches the area of the chopper (1) and is processed there in the desired manner by the chopper in order to break down lumps and to obtain a uniform mixing result or mix. This mixer is therefore particularly suitable for processing mixes which tend to form lumps, for example moist mixes.

Der Behälter (1) ist an einem Ende mit einem als Einlauf dienenden Stutzen (26) und am entgegengesetzten Ende mit einem als Auslauf dienenden Stutzen (27) versehen. Diese Stutzen können mit Anschlüssen oder Verschlüssen versehen sein. In der dargestellten Ausführungsform ist der Mischer für kontinuierliche Arbeitsweise ausgelegt, jedoch kann er auch im Chargenbetrieb eingesetzt werden.The container (1) is provided at one end with a nozzle (26) serving as an inlet and at the opposite end with a nozzle (27) serving as an outlet. These sockets can be provided with connections or closures. In the illustrated embodiment, the mixer is for designed for continuous operation, but it can also be used in batch operation.

Obwohl bei der zeichnerisch dargestellten Ausführungsform die Zähne (19,24) der Scherkränze (13,14) von Stator (11) und Rotor (12) einen trapezförmigen oder eckigen Querschnitt aufweisen und an den einander zugewandten Seiten der Scherkränze mit miteinander zusammenwirkenden Schneidkanten (25) versehen sind, können die Zähne auch einen anderen Querschnitt aufweisen, beispielsweise einen kreisförmigen, einen ovalen, einen quadratischen oder rechteckigen Querschnitt. Dabei kann der Zerkleinerer (10) als eine Art Turbomühle aufgefaßt werden, welche das im mit horizontaler Längsachs bzw. liegend angeordneten zylindrischen Behälter (1) befindliche Mischgut aufschließt.Although, in the embodiment shown in the drawing, the teeth (19, 24) of the shear rings (13, 14) of the stator (11) and rotor (12) have a trapezoidal or angular cross-section and on the mutually facing sides of the shear rings with interacting cutting edges (25 ) are provided, the teeth can also have a different cross-section, for example a circular, oval, square or rectangular cross-section. The shredder (10) can be understood as a type of turbo-mill, which disintegrates the material to be mixed in the cylindrical container (1), which is arranged with a horizontal longitudinal axis or lying horizontally.

Die radialen Durchbrüche (18) zwischen den Zähnen (19 bzw. 24) von Stator (11) und/oder Rotor (12) haben vorzugsweise eine Breite zwischen etwa 3 bis 10 mm. Eine derartige Dimensionierung gewährleistet ein sicheres und schonendes Aufschließen der zu verarbeitenden Mischgüter. In Einzelfällen können die Spaltbreiten jedoch auch kleiner oder größer sein.The radial openings (18) between the teeth (19 or 24) of the stator (11) and / or rotor (12) preferably have a width between approximately 3 to 10 mm. Such dimensioning ensures safe and gentle disintegration of the mixed materials to be processed. In individual cases, however, the gap widths can also be smaller or larger.

Nach einem weiteren Merkmal können die radialen Arme (22) des Rotors (12) verschränkt ausgebildet sein, was einen gezielten Fördereffekt im Bereich von Stator (11) und Rotor (12) bewirkt.According to a further feature, the radial arms (22) of the rotor (12) can be designed in an interlaced manner, which brings about a targeted conveying effect in the area of the stator (11) and rotor (12).

Der Spalt zwischen Stator (11) und Rotor (12) kann unterschiedlich weit bzw. breit ausgeführt werden und liegt vorzugsweise im Bereich von 1 bis 5 mm. In diesem Spaltbereich ist ein gutes und zufriedenstellendes Zusammenwirken der Zähne von Rotor und Stator gewährleistet.The gap between the stator (11) and the rotor (12) can be of different widths and widths and is preferably in the range from 1 to 5 mm. A good and satisfactory interaction of the teeth of the rotor and stator is guaranteed in this gap area.

Nach einem weiteren Merkmal sind der Stator (11) und der Rotor (12) aus besonders hartem Werkstoff ausgeführt, wobei es unter Umständen ausreicht, die besonderem Verschleiß ausgesetzten Obberflächen von Stator und Rotor mit einer Hartstoffbeschichtung zu versehen.According to a further feature, the stator (11) and the rotor (12) are made of particularly hard material, it being sufficient under certain circumstances to provide the surfaces of the stator and rotor which are particularly subject to wear with a hard material coating.

Nach einem anderen Merkmal ist der Stator (11) auf zwei Rohrstücken befestigt, welche für eine Flüssigkeitszugabe von außen in den Bereich von Stator (11) und Rotor (12) ausgelegt sind und benutzt werden können, sofern dem im Behälter (1) befindlichen Mischgut bei der Bearbeitung Flüssigkeit zugeführt bzw. dieses dabei befeuchtet werden soll. Die beiden Rohrstücke können konzentrisch zueinander angeordnet sein, so daß im Spalt zwischen diesen beiden unterschiedliche Durchmesser aufweisenden Rohrstücken die Flüssigkeit herangeführt werden kann.According to another feature, the stator (11) is fastened on two pieces of pipe which are used to add liquid to the area from the outside of the stator (11) and rotor (12) are designed and can be used if the mixture in the container (1) is to be supplied with liquid during processing or is to be moistened in the process. The two pipe sections can be arranged concentrically to one another, so that the liquid can be introduced into the gap between these two pipe sections having different diameters.

Nach noch einem weiteren Merkmal kann der Scherspalt zwischen Stator (11) und Rotor (12) leicht exzentrisch ausgebildet sein, das heißt der Rotor (12) ist exzentrisch im Stator (11) angeordnet bzw. gelagert. Dadurch erhält man einen pulsierenden Aufschließ- und Mahleffekt zwischen den beiden miteinander zusammenwirkenden Organen (11,12) des Zerkleinerers (10).According to yet another feature, the shear gap between the stator (11) and the rotor (12) can be designed to be slightly eccentric, that is to say the rotor (12) is arranged or mounted eccentrically in the stator (11). This gives a pulsating disintegration and grinding effect between the two interacting organs (11, 12) of the shredder (10).

Der als Aufschließ- und Mahlorgan oder auch als Turbomühle zu bezeichnende Zerkleinerer (10) ist vorzugsweise im seitlichen bis unteren Bereich des Behälters (1) angeordnet. Er liegt im Bereich von 0 bis 180° und vorzugsweise in einem Bereich zwischen 20 und 160° zur Senkrechten durch die horizontale Längsachse des Behälters (1) bzw. zur horizontal angeordneten Welle (4) des im Behälter (1) befindlichen Mischwerkes.The shredder (10), which can be referred to as a disintegrating and grinding element or also as a turbo-mill, is preferably arranged in the lateral to lower region of the container (1). It lies in the range from 0 to 180 ° and preferably in a range between 20 and 160 ° to the vertical through the horizontal longitudinal axis of the container (1) or to the horizontally arranged shaft (4) of the mixer located in the container (1).

Claims (17)

1. Mischer, mit einem beispielsweise zylinderförmigen Behälter, einem im Behälter angeordneten, eine drehbar gelagerte Welle und daran an radialen Armen befestigte Mischwerkzeuge aufweisenden Mischwerk und mit wenigstens einem in der zylindrischen Behälterwand gelagerten Zerkleinerer, dessen Zerkleinerungselemente in einem derartigen Abstand von der Behälterwand angeordnet sind, daß Mischwerkzeuge zwischen der Behälterwand und den Zerkleinerungselementen hindurchbewegt werden können,
dadurch gekennzeichnet,
daß jeder Zerkleinerer (10) zwei konzentrisch zueinander angeordnete, relativ gegeneinander drehbare Scherkränze (13,14) aufweist.1. Mixer, with, for example, a cylindrical container, a mixer arranged in the container, having a rotatably mounted shaft and mixing tools attached to it on radial arms, and with at least one shredder mounted in the cylindrical container wall, the shredding elements of which are arranged at such a distance from the container wall that mixing tools can be moved between the container wall and the shredding elements,
characterized by
that each shredder (10) has two shear rings (13, 14) which are arranged concentrically to one another and can be rotated relative to one another. 2. Mischer nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Scherkränze (13,14) mit hochstehenden Zähnen (19,24) versehen sind.2. Mixer according to claim 1, characterized in that the two shear rings (13, 14) are provided with raised teeth (19, 24). 3. Mischer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zähne der beiden Scherkränze (13,14) unterschiedliche Form und/oder Größe haben.3. Mixer according to claim 1 or 2, characterized in that the teeth of the two shear rings (13, 14) have different shapes and / or sizes. 4. Mischer nach Anspruch 3, dadurch gekennzeichnet, daß die Zähne (19) des einen Scherkranzes (13) einen etwa quadratischen oder rechteckigen Querschnitt aufweisen, wobei sich zwischen diesen Zähnen verhältnismäßig schmale radiale Durchbrüche (18) befinden, und daß die Zähne (24) des anderen Scherkranzes (14) im Grundriß Länger als die Zähne des ersten Scherkranzes sind und einen trapezoiden Querschnitt haben, wobei zwischen diesen Zähnen etwa spiralförmig verlaufende breitere Durchbrüche (23) vorgesehen sind.4. Mixer according to claim 3, characterized in that the teeth (19) of a shear ring (13) have an approximately square or rectangular cross section, with relatively narrow radial openings (18) between these teeth, and that the teeth (24 ) of the other shear ring (14) in plan are longer than the teeth of the first shear ring and have a trapezoidal cross-section, with approximately spirally extending wider openings (23) being provided between these teeth. 5. Mischer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der eine Scherkranz (13) als Stator (11) und der andere Scherkranz (14) als Rotor (12) ausgebildet ist.5. Mixer according to one of claims 1 to 4, characterized in that the one shear ring (13) as a stator (11) and the other shear ring (14) is designed as a rotor (12). 6. Mischer nach Anspruch 5, dadurch gekennzeichnet, daß der äußere Scherkranz (13) als Stator (11) ausgebildet ist.6. Mixer according to claim 5, characterized in that the outer shear ring (13) is designed as a stator (11). 7. Mischer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Scherkranz (13) des Stators (11) auf wenigstens einem Rohrstück (15) befestigt ist, durch das eine Antriebswelle (20) des Scherkranzes (14) des Rotors (12) hindurchgeführt ist.7. Mixer according to one of claims 1 to 6, characterized in that the shear ring (13) of the stator (11) is attached to at least one pipe section (15) through which a drive shaft (20) of the shear ring (14) of the rotor ( 12) is passed through. 8. Mischer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die beiden Scherkränze (13,14) in Draufsicht ringförmig ausgebildet sind.8. Mixer according to one of claims 1 to 7, characterized in that the two shear rings (13, 14) are annular in plan view. 9. Mischer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß wenigstens die Zähne (24) des Rotors (12) einen kreisförmigen, ovalen, quadratischen, rechteckigen oder trapezförmigen Querschnitt ausweisen und gegebenenfalls die Zähne an den einander zugewandten Seiten der Scherkränze (13,14) mit miteinander zusammenwirkenden Schneidkanten (25) versehen sind.9. Mixer according to one of claims 1 to 8, characterized in that at least the teeth (24) of the rotor (12) have a circular, oval, square, rectangular or trapezoidal cross section and optionally the teeth on the mutually facing sides of the shear rings ( 13, 14) are provided with interacting cutting edges (25). 10. Mischer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die radialen Drchbrüche (18) zwischen den Zähnen (19;24) von Stator (11) und/oder Rotor (12) eine Breite zwishen etwa 3 bis 10 mm aufweisen.10. Mixer according to one of claims 1 to 9, characterized in that the radial breakthroughs (18) between the teeth (19; 24) of the stator (11) and / or rotor (12) have a width between about 3 to 10 mm . 11. Mischer nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die radialen Arme (22) des Rotors (12) verschränkt ausgebildet sind.11. Mixer according to one of claims 1 to 10, characterized in that the radial arms (22) of the rotor (12) are formed crossed. 12. Mischer nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der Spalt zwischen Rotor (12) und Stator (11) zwischen 1 bis 5 mm weit ist.12. Mixer according to one of claims 1 to 11, characterized in that the gap between the rotor (12) and stator (11) is between 1 to 5 mm wide. 13. Mischer nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß Rotor (12) und/oder Stator (11) zumindest an der Oberfläche aus besonders hartem Werkstoff bestehen.13. Mixer according to one of claims 1 to 12, characterized in that the rotor (12) and / or stator (11) at least on the surface consist of particularly hard material. 14. Mischer nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß der Stator (11) auf zwei Rohrstücken angeordnet ist und daß diese Rohrstücke für eine Flüssigkeitszufuhr in den von Rotor (12) und Stator (11) gebildeten Kranz ausgelegt sind.14. Mixer according to one of claims 1 to 13, characterized in that the stator (11) is arranged on two pipe sections and that these pipe sections are designed for a liquid supply in the ring formed by the rotor (12) and stator (11). 15. Mischer nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Rotor (12) exzentrisch im Stator (11) angeordnet ist.15. Mixer according to one of claims 1 to 14, characterized in that the rotor (12) is arranged eccentrically in the stator (11). 16. Mischer nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß Stator (11) und Rotor (12), welche eine Turbomühle bilden, im unteren Bereich des Umfanges des liegend bzw. mit horizontaler Achse angeordneten zylindrischen Behälters (1) vorgesehen sind.16. Mixer according to one of claims 1 to 15, characterized in that the stator (11) and rotor (12), which form a turbo-mill, are provided in the lower region of the circumference of the cylindrical container (1) lying horizontally or with a horizontal axis . 17. Mischer nach Anspruch 16, dadurch gekennzeichnet, daß die zentralen Achsen von Stator (11) und Rotor (12) in einem Winkel von 20° bis 160° zur Senkrechten durch die horizontale Längsachse des Behälters (1) und der in dieser gelagerten Welle (4) des Mischwerkes angeordnet sind.17. Mixer according to claim 16, characterized in that the central axes of the stator (11) and rotor (12) at an angle of 20 ° to 160 ° to the vertical through the horizontal longitudinal axis of the container (1) and the shaft mounted therein (4) the mixer are arranged.
EP88111308A 1987-08-28 1988-07-14 Mixer with stirrer and grinder Expired - Lifetime EP0304604B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111308T ATE92364T1 (en) 1987-08-28 1988-07-14 MIXER WITH MIXER AND GRINDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3728710A DE3728710C2 (en) 1987-08-28 1987-08-28 Mixer for mixing bulk solids
DE3728710 1987-08-28

Publications (3)

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EP0304604A2 true EP0304604A2 (en) 1989-03-01
EP0304604A3 EP0304604A3 (en) 1989-06-07
EP0304604B1 EP0304604B1 (en) 1993-08-04

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ID=6334669

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US (1) US4860960A (en)
EP (1) EP0304604B1 (en)
JP (1) JPH0815538B2 (en)
AT (1) ATE92364T1 (en)
DE (2) DE3728710C2 (en)
ES (1) ES2043739T3 (en)

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EP0664152A1 (en) * 1994-01-21 1995-07-26 Maskinfabriken Samson, Tange A/S Vehicle for mixing and dispensing animal feed
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US7097141B2 (en) * 2002-08-16 2006-08-29 Nibco Incorporated Sway brace clamp and connector assembly
DE202005006133U1 (en) * 2005-04-12 2005-06-23 Fischer, Ludger Batch mixer for production of viscous emulsions, ointments and creams incorporates an external homogenizer
US8002774B2 (en) 2007-11-07 2011-08-23 Stryker Corporation Bone mill including a base and a mill head separate from the base, the mill head including a moveable catch tray
JP6384404B2 (en) * 2015-06-01 2018-09-05 トヨタ自動車株式会社 Composite active material powder manufacturing apparatus and composite active material powder manufacturing method
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WO2020156806A1 (en) * 2019-02-01 2020-08-06 Ystral Gmbh Maschinenbau + Processtechnik Rotor for a device for mixing powder and liquid, and device for mixing powder and liquid

Also Published As

Publication number Publication date
ES2043739T3 (en) 1994-01-01
DE3728710A1 (en) 1989-03-09
DE3882846D1 (en) 1993-09-09
JPH0815538B2 (en) 1996-02-21
EP0304604A3 (en) 1989-06-07
EP0304604B1 (en) 1993-08-04
JPS6490023A (en) 1989-04-05
US4860960A (en) 1989-08-29
DE3728710C2 (en) 1997-08-21
ATE92364T1 (en) 1993-08-15

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