EP0063257B1 - Mixer with annular vat - Google Patents

Mixer with annular vat Download PDF

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Publication number
EP0063257B1
EP0063257B1 EP82102539A EP82102539A EP0063257B1 EP 0063257 B1 EP0063257 B1 EP 0063257B1 EP 82102539 A EP82102539 A EP 82102539A EP 82102539 A EP82102539 A EP 82102539A EP 0063257 B1 EP0063257 B1 EP 0063257B1
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EP
European Patent Office
Prior art keywords
rotor
vat
mixing
annular
mixer
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.)
Expired
Application number
EP82102539A
Other languages
German (de)
French (fr)
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EP0063257A2 (en
EP0063257A3 (en
Inventor
Walter Stahl
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Individual
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Individual
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Publication of EP0063257A2 publication Critical patent/EP0063257A2/en
Publication of EP0063257A3 publication Critical patent/EP0063257A3/en
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Publication of EP0063257B1 publication Critical patent/EP0063257B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
    • B28C5/163—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis in annularly-shaped containers
    • B28C5/165—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis in annularly-shaped containers with stirrers having planetary motion
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B01F27/951—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis with at least one stirrer mounted on the sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/323—Driving arrangements for vertical stirrer shafts
    • 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
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • 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
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • 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
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2324—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes planetary

Definitions

  • the invention relates to a ring trough positive mixer with a mixer rotor, which is driven from below via a drive shaft guided through an interior of the ring trough and a drive motor and has at least one mixing tool engaging in the ring trough, at least one of the mixing tools being rotatable and by which Drive shaft can be driven via a gear transmission.
  • DE-U-19 67 024 describes a mixer whose mixer rotor is driven from below via a drive shaft which is arranged in the interior of the ring trough.
  • the drive shaft is connected to a drive motor via a gear, the gear housing forming the inner wall of the ring trough.
  • a gearwheel of a gearwheel gearbox is provided at the upper end of the gearbox housing, by means of which at least one of the mixing tools can be driven.
  • the gearwheel mentioned is located in the upper region of the annular mixing space, that is to say outside the interior mentioned.
  • the height of the mixing chamber is thus reduced by the gearwheel or the gearwheel transmission, or the overall height of the mixer must be increased accordingly in order to obtain a certain height for the mixing chamber.
  • a housing accommodating the gear mentioned is required in order to avoid contamination or even damage to the gear by the mix.
  • a seal assembly is required for the housing to prevent oil or other lubricant from the gear train from reaching the mix in the ring trough.
  • a mixing machine for building materials is known from DE-B-11 25 337, in which the gear is arranged below the ring trough.
  • the drive shaft arranged in the interior of the ring trough projects downwards into the gearbox.
  • the mixing tools are arranged essentially rigidly on the rotor and these mixing tools are not driven to move relative to the rotor.
  • the inner wall of the trough is formed by a piece of pipe and a spacer sleeve and the rotor contains a cup-shaped tool carrier which forms a labyrith seal with the piece of pipe.
  • the invention has for its object to further develop the ring trough compulsory mixer of the type mentioned above in such a way that the interior of the ring trough is used for the gear transmission and a low overall height is achieved.
  • a trough inner wall is provided, which extends to the underside of the rotor, that there is a space between the gear housing and the inner trough wall and the underside, in which space the ring gear and the gear for the mixing tool are arranged.
  • the ring trough compulsory mixer designed in this way is distinguished by a comparatively small overall height, since the ring gear of the gear transmission is arranged in the space mentioned and not in the ring trough. This results in an optimal utilization of the construction volume, whereby a not inconsiderable saving in weight and material is also achieved.
  • a high filling level for the mix can be permitted.
  • said toothed ring is protected against contamination in a particularly simple manner.
  • the gear mechanism for driving the mixing tool can contain additional gear wheels or a belt or chain drive in addition to the ring gear arranged in the space in the interior, in order to be able to drive several mixing tools if necessary.
  • the rotor can have several fixed and also several rotatable mixing tools.
  • FIG. 1 schematically shows an axial longitudinal section in which a ring trough 2 and a rotor 6 rotatably arranged about a first axis can be seen.
  • the ring trough 2 with its cover 8, like an electric drive motor 10, belongs to the base frame 12.
  • the electric drive motor 10 is connected via a propeller shaft 14 to a transmission, the transmission housing 16 of which is shown.
  • the gear housing 16 is inserted into the interior of the ring trough 2, there being an intermediate space 18 which is formed by the inner wall of the trough, the gear housing 16 and the underside of the rotor 6. If necessary, the drive motor 10 is also flanged directly to the transmission.
  • the transmission has a drive shaft 20, the upper shaft journal is indicated here with dashed lines.
  • the rotor 6 is rotatably mounted in a manner not to be explained in more detail here, the transmission of the rotary movement to the rotor 6 being carried out by means of the drive shaft 20.
  • the rotor 6 has a number of mixing tools 22 which are essentially fixedly connected to it, each of which contains an elastically or rigidly mounted mixing arm 24 and a mixing blade 26.
  • the mixing blades 26 protrude into the ring trough 2 or into the mixture 28 located there and indicated by the dash-dotted line. When the rotor 6 rotates, the mixing blades 26 rotate with the rotor 6.
  • a rotatable mixing tool 30 is connected to the rotor, but this about an axis 32 with respect to the rotor 6 so that the rotatable mixing tool can basically have one or more mixing blades.
  • the rotating mixing tool performs a rotation in the opposite direction to the rotor rotation.
  • the mixing tools may also have a different structure or shape.
  • all of the mixing tools can optionally also be arranged rotatable about separate axes of rotation with respect to the rotor, but at least one mixing tool must be fixed for the purpose of emptying the ring trough.
  • the emptying can be carried out in a particularly simple manner, since, as already explained, the mixing tools 22 are arranged on the rotor essentially in a rotationally fixed manner.
  • An emptying device 40 is provided below the ring trough 2 in order to open or close off an opening located in the bottom of the ring trough 2 by means of a slide.
  • a total of ten essentially fixed mixing tools 22 are connected to the rotor 6. These mixing tools 22 are arranged in a known manner on mixing arms of different lengths and also at different heights with respect to the axis of rotation in order to obtain good mixing of the mixing material in the ring trough 2.
  • the rotor 6 is provided with a lateral extension 42, on which the rotatable mixing tool 30 is arranged. The rotational movement of the rotor 6 is indicated by the arrow 46.
  • the mixing tool 30 also performs a rotational movement in the direction of arrow 44, the latter rotational movement being superimposed on the rotation of the rotor in the direction of arrow 46.
  • the mixing tool 30 is preferably rotated in the opposite direction to the rotation of the rotor 6.
  • the mixing blades 36, 38 are rotated in the opposite direction.
  • the mixture 28 is separated and a particularly good mixing takes place.
  • a particularly fast and intensive mixing of the mix in the ring trough 2 is thus achieved, for which only an extremely small additional effort is required.
  • An emptying opening 48 is represented by the approximately semicircular line. The emptying opening 48 is covered during the mixing by means of a slide 50 which can be actuated by the emptying device 40 explained above for the purpose of emptying.
  • Fig. 3 shows an enlarged partial section, in which the gear housing 16 has an approximately conical shape.
  • a ring gear 52 is flanged, which has an internal toothing 54.
  • the ring gear 52 can also be flanged to a separate receiving device.
  • a gear 66 is provided in the interior 56 of the rotor 6, which is connected to the ring gear 52 via a gear 60, so that the rotatable mixing tool 30 can be driven via the gear gear 58 designed in this way.
  • the ring gear 52 is located in the intermediate space 18, which is surrounded by the inner wall 68, the gear housing 16 and the underside 70 of the rotor 6.
  • the mixing tool 30 is arranged on the rotor 6 by means of a mounting and bearing device 62.
  • This device contains a shaft 64, at the lower end of which the rotatable mixing tool 30 and at the upper end of which the gear 66 is located inside the rotor 6.
  • the rotor 6 is rotatably connected to the upper pin of the drive shaft 20 by means of a feather key.
  • the rotor 6 is also rotated by rotation of the drive shaft 20. It can be seen that due to the toothed ring 52 firmly connected to the gear housing 16 and also via the gear 58, the mixing tool 30 also undergoes a self-rotation about the axis 32.
  • a sealing arrangement 72 is located between the upper edge of the inner wall 68 of the ring trough 2 and the underside 70 of the rotor 6.
  • This sealing arrangement 72 has two rings 74, 76 which are arranged coaxially to the drive shaft 20 and are fixedly connected to the underside 70 of the rotor 6 surround the upper part of the inner wall 68.
  • a labyrinth seal is thus created in a particularly simple manner in order to largely prevent the penetration of dust or other dirt from the ring trough into the space 18. In this way, the reliability and operational safety are not negligibly improved.
  • the ring trough 2 is provided with a lining 78 in a known manner. There is also an annular gap between the upper end of the lining 78 and the ring 74, through which the sealing effect is thus increased in a particularly simple manner.
  • the ring 76 is designed as a sealing ring with sealing lips or the like. With such a sealing ring achieved a reliable seal, either alone or in cooperation with the labyrinth seal explained above.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Description

Die Erfindung bezieht sich auf einen Ringtrogzwangsmischer mit einem Mischwerksrotor, welcher von unten über eine über ein Getriebe durch einen Innenraum des Ringtroges geführte Antriebswelle und einen Antriebsmotor angetrieben wird und mindestens ein in den Ringtrog eingreifendes Mischwerkzeug aufweist, wobei wenigstens eines der Mischwerkzeuge drehbar und von der Antriebswelle über ein Zahnradgetriebe antreibbar ist.The invention relates to a ring trough positive mixer with a mixer rotor, which is driven from below via a drive shaft guided through an interior of the ring trough and a drive motor and has at least one mixing tool engaging in the ring trough, at least one of the mixing tools being rotatable and by which Drive shaft can be driven via a gear transmission.

In dem DE-U-19 67 024 ist ein Mischer beschrieben, dessen Mischwerksrotor von unten über eine Antriebswelle angetrieben wird, welche im Innenraum des Ringtroges angeordnet ist. Die Antriebswelle steht über ein Getriebe mit einem Antriebsmotor in Verbindung, wobei das Getriebegehäuse die Innenwand des Ringtroges bildet. Am oberen Ende des Getriebegehäuses ist ein Zahnrad eines Zahnradgetriebes vorgesehen, über welches wenigstens eines der Mischwerkzeuge antreibbar ist. Das genannte Zahnrad befindet sich in dem oberen Bereich des ringförmigen Mischraumes, also außerhalb des erwähnten Innenraumes. Durch das Zahnrad bzw. das Zahnradgetriebe wird somit die Höhe des Mischraumes verringert oder der Mischer muß in seiner Gesamthöhe entsprechend vergrößert werden, um für den Mischraum eine bestimmte Höhe zu erhalten. Ferner ist ein das genannte Zahnrad aufnehmendes Gehäuse erforderlich, um eine Verschmutzung oder gar eine Beschädigung des Zahnrades durch das Mischgut zu vermeiden. Schließlich ist für das Gehäuse eine Dichtungsanordnung erforderlich, um zu verhindern, daß öl oder sonstiges Schmiermittel von dem Zahnradgetriebe zu dem Mischgut im Ringtrog gelangen.DE-U-19 67 024 describes a mixer whose mixer rotor is driven from below via a drive shaft which is arranged in the interior of the ring trough. The drive shaft is connected to a drive motor via a gear, the gear housing forming the inner wall of the ring trough. A gearwheel of a gearwheel gearbox is provided at the upper end of the gearbox housing, by means of which at least one of the mixing tools can be driven. The gearwheel mentioned is located in the upper region of the annular mixing space, that is to say outside the interior mentioned. The height of the mixing chamber is thus reduced by the gearwheel or the gearwheel transmission, or the overall height of the mixer must be increased accordingly in order to obtain a certain height for the mixing chamber. Furthermore, a housing accommodating the gear mentioned is required in order to avoid contamination or even damage to the gear by the mix. Finally, a seal assembly is required for the housing to prevent oil or other lubricant from the gear train from reaching the mix in the ring trough.

Ferner ist aus der DE-B-11 25 337 eine Mischmaschine für Baustoffe bekannt, bei welcher das Getriebe unterhalb des Ringtroges angeordnet ist. Die im Innenraum des Ringtroges angeordnete Antriebswelle ragt nach unten in das Getriebe. Die Mischwerkzeuge sind auf dem Rotor im wesentlichen starr angeordnet und ein Antrieb dieser Mischwerkzeuge zur Bewegung relativ zum Rotor erfolgt nicht. Die Troginnenwand wird durch ein Rohrstück und eine Distanzbuchse gebildet und der Rotor enthält einen topfförmigen Werkzeugträger, welcher mit dem Rohrstück eine Labyrithdichtung bildet. In dem Innenraum ist praktisch nur die Antriebswelle angeordnet und unterhalb des Ringtroges ist ein zusätzlicher Platzbedarf für das Getriebe erforderlich, wodurch die Bauhöhe der Mischmaschine entsprechend groß wird.Furthermore, a mixing machine for building materials is known from DE-B-11 25 337, in which the gear is arranged below the ring trough. The drive shaft arranged in the interior of the ring trough projects downwards into the gearbox. The mixing tools are arranged essentially rigidly on the rotor and these mixing tools are not driven to move relative to the rotor. The inner wall of the trough is formed by a piece of pipe and a spacer sleeve and the rotor contains a cup-shaped tool carrier which forms a labyrith seal with the piece of pipe. In the interior, practically only the drive shaft is arranged and underneath the ring trough additional space is required for the gearbox, which means that the overall height of the mixing machine is correspondingly large.

Der Erfindung liegt die Aufgabe zugrunde, den Ringtrogzwangsmischer deren eingangs genannten Art dahingehend weiterzubilden, daß der Innenraum des Ringtroges für das Zahnradgetriebe genutzt und eine geringe Bauhöhe erreicht wird.The invention has for its object to further develop the ring trough compulsory mixer of the type mentioned above in such a way that the interior of the ring trough is used for the gear transmission and a low overall height is achieved.

Diese Aufgabe wird dadurch gelöst, daß eine Troginnenwand vorgesehen ist, welche bis an die Unterseite des Rotors reicht, daß ein Zwischenraum zwischen dem Getriebegehäuse und der Troginnenwand sowie der Unterseite vorhanden ist, in welchem Zwischenraum der Zahnkranz und das Zahnrad für das Mischwerkzeug angeordnet sind.This object is achieved in that a trough inner wall is provided, which extends to the underside of the rotor, that there is a space between the gear housing and the inner trough wall and the underside, in which space the ring gear and the gear for the mixing tool are arranged.

Der derart ausgebildete Ringtrogzwangsmischer zeichnet sich durch eine vergleichsweise geringe Bauhöhe aus, da der Zahnkranz des Zahnradgetriebes in dem genannten Zwischenraum und nicht in dem Ringtrog angeordnet ist. Es ergibt sich somit eine optimale Ausnutzung des Bauvolumens, wobei auch eine nicht unerhebliche Gewichts- und Materialersparnis erzielt wird. Durch den Einbau des Zahnkranzes und des Zahnrades im Zwischenraum kann ein hohes Auffüllniveau für das Mischgut zugelassen werden. Ferner wird aufgrund der Anordnung des Zahnkranzes in dem Zwischenraum zwischen dem Getriebegehäuse, der Troginnenwand und der Unterseite des Rotors der genannte Zahnkranz in besonders einfacher Weise gegen Verschmutzung geschützt. Das Zahnradgetriebe zum Antreiben des Mischwerkzeuges kann zusätzlich zu den im Zwischenraum angeordneten Zahnkranz im Inneren des Rotors weitere Zahnräder oder einen Riemen- oder Kettentrieb enthalten, um gegebenenfalls auch mehrere Mischwerkzeuge antreiben zu können. So kann je nach Anforderungen der Rotor mehrere feststehende und auch mehrere drehbare Mischwerkzeuge aufweisen.The ring trough compulsory mixer designed in this way is distinguished by a comparatively small overall height, since the ring gear of the gear transmission is arranged in the space mentioned and not in the ring trough. This results in an optimal utilization of the construction volume, whereby a not inconsiderable saving in weight and material is also achieved. By installing the ring gear and the gear wheel in the intermediate space, a high filling level for the mix can be permitted. Furthermore, due to the arrangement of the toothed ring in the space between the gear housing, the inner wall of the trough and the underside of the rotor, said toothed ring is protected against contamination in a particularly simple manner. The gear mechanism for driving the mixing tool can contain additional gear wheels or a belt or chain drive in addition to the ring gear arranged in the space in the interior, in order to be able to drive several mixing tools if necessary. Depending on the requirements, the rotor can have several fixed and also several rotatable mixing tools.

In den Patentansprüchen 2 bis 5 sind zweckmäßige Weiterbildungen und Ausgestaltungen des Ringtrogzwangsmischers angegeben.In the claims 2 to 5 expedient further developments and refinements of the ring trough positive mixer are specified.

Anhand der Zeichnung wird ein Ausführungsbeispiel näher erläutert. Es zeigen:

  • Fig. 1 schematisch einen axialen Längsschnitt,
  • Fig. 2 schematisch eine Aufsicht in Blickrichtung 11 gemäß Fig. 1, wobei jedoch die Abdeckhaube abgenommen ist,
  • Fig. 3 einen vergrößerten Teilausschnitt in der gleichen Ebene wie Fig. 1.
An exemplary embodiment is explained in more detail with reference to the drawing. Show it:
  • 1 schematically shows an axial longitudinal section,
  • 2 schematically shows a top view in the viewing direction 11 according to FIG. 1, but with the cover removed;
  • 3 shows an enlarged partial section in the same plane as FIG. 1.

In Fig. 1 ist schematisch ein axialer Längsschnitt dargestellt, in welchem ein Ringtrog 2 und ein um eine erste Achse drehbar angeordnete Rotor 6 zu erkennen ist. Der Ringtrog 2 mit seiner Abdeckhaube 8 gehört ebenso wie ein elektrischer Antriebsmotor 10 zum Untergestell 12. Der elektrische Antriebsmotor 10 steht über eine Gelenkwelle 14 mit einem Getriebe, dessen Getriebegehäuse 16 dargestellt ist, in Verbindung. Das Getriebegehäuse 16 ist in den Innenraum des Ringtrogs 2 eingesetzt, wobei ein Zwischenraum 18 vorhanden ist, welcher von der Troginnenwand, dem Getriebegehäuse 16 und der Unterseite des Rotors 6 gebildet ist. Gegebenenfalls ist der Antriebsmotor 10 auch direkt an das Getriebe angeflanscht. Das Getriebe weist eine Antriebswelle 20 auf, deren oberer Wellenzapfen hier mit gestrichelten Linien angedeutet ist. Der Rotor 6 ist in hier nicht näher zu erläuternder Weise drehbar gelagert, wobei mittels der Antriebswelle 20 die Übertragung der Drehbewegung auf den Rotor 6 erfolgt. Der Rotor 6 weist eine Anzahl von im wesentlichen fest mit ihm verbundenen Mischwerkzeuge 22 auf, welche jeweils einen elastisch oder starr im Rotor gelagerten Mischarm 24 sowie eine Mischschaufel 26 enthalten. Die Mischschaufetn 26 ragen in den Ringtrog 2 bzw. in das dort befindliche und durch die strichpunktierte Linie angedeutete Mischgut 28. Bei Drehung des Rotors 6 drehen sich die Mischschaufeln 26 mit dem Rotor 6. Mit dem Rotor ist ein drehbares Mischwerkzeug 30 verbunden, welches jedoch um eine Achse 32 bezüglich des Rotors 6 drehbar gelhervorgehoben, daß das drehbare Mischwerkzeug grundsätzlich ein oder auch mehrere Mischschaufeln aufweisen kann. Um eine schnelle und gute Vermischung zu erhalten, führt das drehbare Mischwerkzeug eine zur Rotordrehung gegensinnige Drehung durch. Es bedarf keiner besonderen Erwähnung, daß die Mischwerkzeuge gegebenenfalls auch einen anderen Aufbau oder eine Formgebung aufweisen können. So können im Rahmen der Erfindung gegebenenfalls auch sämtliche Mischwerkzeuge um separate Drehachsen bezüglich des Rotors drehbar angeordnet sein, wobei jedoch zum Zwecke der Entleerung des Ringtroges wenigstens ein Mischwerkzeug festzusetzen ist. Bei der dargestellten Ausführungsform ist jedoch in besonders einfacher Weise die Entleerung durchführbar, da auf dem Rotor die Mischwerkzeuge 22, wie bereits erläutert, im wesentlichen drehfest angeordnet sind. Unterhalb des Ringtroges 2 ist eine Entleerungsvorrichtung 40 vorgesehen, um mittels eines Schiebers eine im Boden des Ringtrogs 2 befindliche Öffnung freizugeben bzw. abzusperren.1 schematically shows an axial longitudinal section in which a ring trough 2 and a rotor 6 rotatably arranged about a first axis can be seen. The ring trough 2 with its cover 8, like an electric drive motor 10, belongs to the base frame 12. The electric drive motor 10 is connected via a propeller shaft 14 to a transmission, the transmission housing 16 of which is shown. The gear housing 16 is inserted into the interior of the ring trough 2, there being an intermediate space 18 which is formed by the inner wall of the trough, the gear housing 16 and the underside of the rotor 6. If necessary, the drive motor 10 is also flanged directly to the transmission. The transmission has a drive shaft 20, the upper shaft journal is indicated here with dashed lines. The rotor 6 is rotatably mounted in a manner not to be explained in more detail here, the transmission of the rotary movement to the rotor 6 being carried out by means of the drive shaft 20. The rotor 6 has a number of mixing tools 22 which are essentially fixedly connected to it, each of which contains an elastically or rigidly mounted mixing arm 24 and a mixing blade 26. The mixing blades 26 protrude into the ring trough 2 or into the mixture 28 located there and indicated by the dash-dotted line. When the rotor 6 rotates, the mixing blades 26 rotate with the rotor 6. A rotatable mixing tool 30 is connected to the rotor, but this about an axis 32 with respect to the rotor 6 so that the rotatable mixing tool can basically have one or more mixing blades. In order to get a quick and good mixing, the rotating mixing tool performs a rotation in the opposite direction to the rotor rotation. There is no need to mention that the mixing tools may also have a different structure or shape. Thus, in the context of the invention, all of the mixing tools can optionally also be arranged rotatable about separate axes of rotation with respect to the rotor, but at least one mixing tool must be fixed for the purpose of emptying the ring trough. In the illustrated embodiment, however, the emptying can be carried out in a particularly simple manner, since, as already explained, the mixing tools 22 are arranged on the rotor essentially in a rotationally fixed manner. An emptying device 40 is provided below the ring trough 2 in order to open or close off an opening located in the bottom of the ring trough 2 by means of a slide.

Fig.2 zeigt eine Aufsicht in Blickrichtung 11 gemäß Fig. 1, wobei jedoch die Abdeckhaube 8 nicht dargestellt ist. Mit dem Rotor 6 sind insgesamt zehn im wesentlichen feststehende Mischwerkzeuge 22 verbunden. Diese Mischwerkzeuge 22 sind in bekannter Weise an unterschiedlich langen Mischarmen und auch in unterschiedlicher Höhe bezüglich der Drehachse angeordnet, um eine gute vermischung des Mischgutes im Ringtrog 2 zu erhalten. Der Rotor 6 ist mit einem seitlichen Ansatz 42 versehen, an welchem das drehbare Mischwerkzeug 30 angeordnet ist. Die Drehbewegung des Rotors 6 ist durch den Pfeil 46 angedeutet. Das Mischwerkzeug 30 führt außerdem eine Drehbewegung in Richtung des Pfeiles 44 aus, wobei die letztere Drehbewegung der Drehung des Rotors in Richtung des Pfeiles 46 überlagert ist. Die Drehung des Mischwerkzeuges 30 erfolgt bevorzugt gegensinnig zur Drehung des Rotors 6. In einer bevorzugten Ausführungsform werden die Mischschaufeln 36,38 gegensinnig gedreht. Somit erfolgt ein Abtrennen des Mischgutes 28 und eine besonders gute Mischung. Es wird somit eine besonders schnelle und intensive Mischung des Mischgutes im Ringtrog 2 erreicht, wozu nur ein äußerst geringer zusätzlicher Aufwand erforderlich ist. Eine Entleerungsöffnung 48 ist durch die etwa halbkreisförmige Linie dargestellt. Die Entleerungsöffnung 48 wird während des Mischens mittels eines Schiebers 50 abgedeckt, welcher zum Zwecke der Entleerung von der oben erläuterten Entleerungsvorrichtung 40 betätigbar ist.2 shows a top view in the viewing direction 11 according to FIG. 1, but the cover 8 is not shown. A total of ten essentially fixed mixing tools 22 are connected to the rotor 6. These mixing tools 22 are arranged in a known manner on mixing arms of different lengths and also at different heights with respect to the axis of rotation in order to obtain good mixing of the mixing material in the ring trough 2. The rotor 6 is provided with a lateral extension 42, on which the rotatable mixing tool 30 is arranged. The rotational movement of the rotor 6 is indicated by the arrow 46. The mixing tool 30 also performs a rotational movement in the direction of arrow 44, the latter rotational movement being superimposed on the rotation of the rotor in the direction of arrow 46. The mixing tool 30 is preferably rotated in the opposite direction to the rotation of the rotor 6. In a preferred embodiment, the mixing blades 36, 38 are rotated in the opposite direction. Thus, the mixture 28 is separated and a particularly good mixing takes place. A particularly fast and intensive mixing of the mix in the ring trough 2 is thus achieved, for which only an extremely small additional effort is required. An emptying opening 48 is represented by the approximately semicircular line. The emptying opening 48 is covered during the mixing by means of a slide 50 which can be actuated by the emptying device 40 explained above for the purpose of emptying.

Fig. 3 zeigt einen vergrößerten Teilausschnitt, bei welchem das Getriebegehäuse 16 eine etwa kegelige Form aufweist. Am oberen Ende des Getriebegehäuses 16 ist ein Zahnkranz 52 angeflanscht, welcher eine Innenverzahnung 54 aufweist. Der Zahnkranz 52 kann auch an einer separaten Aufnahmevorrichtung angeflanscht sein. Es ist im Innern 56 des Rotors 6 ein Getriebe 66 vorgesehen, welches über ein Zahnrad 60 mit dem Zahnkranz 52 in Verbindung steht, so daß über das derart ausgebildete Zahnradgetriebe 58 das drehbare Mischwerkzeug 30 antreibbar ist. Der Zahnkranz 52 befindet sich in dem Zwischenraum 18, welcher von der Innenwand 68, dem Getriebegehäuse 16 und der Unterseite 70 des Rotors 6 umgeben ist. Das Mischwerkzeug 30 ist mittels einer Halterungs- und Lagervorrichtung 62 auf dem Rotor 6 angeordnet. Diese Vorrichtung enthält eine Welle 64, an deren unteren Ende das drehbare Mischwerkzeug 30 und an deren obere Ende im Innern des Rotors 6 sich das Getriebe 66 befindet. Der Rotor 6 ist mittels einer Paßfeder mit dem oberen Zapfen der Antriebswelle 20 drehfest verbunden. Durch Drehung der Antriebswelle 20 wird auch der Rotor 6 gedreht. Es ist ersichtlich, daß hierbei aufgrund des mit dem Getriebegehäuse 16 fest verbundenen Zahnkranzes 52 und über das Getriebe 58 auch das Mischwerkzeug 30 eine Eigendrehung um die Achse 32 erfährt. Zwischen dem oberen Rand der Innenwand 68 des Ringtroges 2 und der Unterseite 70 des Rotors 6 befindet sich eine Dichtungsanordnung 72. Diese Dichtungsanordnung 72 weist zwei koaxial zur Antriebswelle 20 angeordnete und mit der Unterseite 70 des Rotors 6 fest verbundene Ringe 74, 76 auf, welche den oberen Teil der Innenwandung 68 umgeben. Es ist somit in besonders einfacher Weise eine Labyrinthdichtung geschaffen, um das Eindringen von Staub oder sonstigen Verschmutzungen aus dem Ringtrog in den Raum 18 hinein weitgehend zu unterbinden. Auf diese Weise wird die Zuverlässigkeit und die Betriebssicherheit nicht unwesentlich verbessert. Der Ringtrog 2 ist in bekannter Weise mit einer Auskleidung 78 versehen. Auch zwischen dem oberen Ende der Auskleidung 78 und dem Ring 74 befindet sich ein Ringspalt, durch welchen somit die Dichtungswirkung in besonders einfacher Weise erhöht wird.Fig. 3 shows an enlarged partial section, in which the gear housing 16 has an approximately conical shape. At the upper end of the gear housing 16, a ring gear 52 is flanged, which has an internal toothing 54. The ring gear 52 can also be flanged to a separate receiving device. A gear 66 is provided in the interior 56 of the rotor 6, which is connected to the ring gear 52 via a gear 60, so that the rotatable mixing tool 30 can be driven via the gear gear 58 designed in this way. The ring gear 52 is located in the intermediate space 18, which is surrounded by the inner wall 68, the gear housing 16 and the underside 70 of the rotor 6. The mixing tool 30 is arranged on the rotor 6 by means of a mounting and bearing device 62. This device contains a shaft 64, at the lower end of which the rotatable mixing tool 30 and at the upper end of which the gear 66 is located inside the rotor 6. The rotor 6 is rotatably connected to the upper pin of the drive shaft 20 by means of a feather key. The rotor 6 is also rotated by rotation of the drive shaft 20. It can be seen that due to the toothed ring 52 firmly connected to the gear housing 16 and also via the gear 58, the mixing tool 30 also undergoes a self-rotation about the axis 32. A sealing arrangement 72 is located between the upper edge of the inner wall 68 of the ring trough 2 and the underside 70 of the rotor 6. This sealing arrangement 72 has two rings 74, 76 which are arranged coaxially to the drive shaft 20 and are fixedly connected to the underside 70 of the rotor 6 surround the upper part of the inner wall 68. A labyrinth seal is thus created in a particularly simple manner in order to largely prevent the penetration of dust or other dirt from the ring trough into the space 18. In this way, the reliability and operational safety are not negligibly improved. The ring trough 2 is provided with a lining 78 in a known manner. There is also an annular gap between the upper end of the lining 78 and the ring 74, through which the sealing effect is thus increased in a particularly simple manner.

Gegebenenfalls ist insbesondere der Ring 76 als ein Dichtring mit Dichtlippen oder dergl. ausgebildet. Mit einem derartigen Dichtring wird eine zuverlässige Abdichtung erreicht, und zwar entweder allein oder auch im Zusammenwirken mit der oben erläuterten Labyrinthdichtung.

Figure imgb0001
If necessary, in particular the ring 76 is designed as a sealing ring with sealing lips or the like. With such a sealing ring achieved a reliable seal, either alone or in cooperation with the labyrinth seal explained above.
Figure imgb0001

Claims (5)

1. An annular vat mixer having a mixer rotor, which is driven from below by means of a drive shaft, which is guided via a gearing through an inner space in the annular vat, and a drive motor, and which comprises at least one mixing implement which penetrates the annular vat, at least one of the mixing implements being rotatable and being driven by the drive shaft via a toothed gearing, which comprises a toothed wheel rim disposed on the gearing housing and a toothed wheel, characterised in that a vat inner wall (68) is provided, which extends as far as the underside (70) of the rotor (6), and an intermediate space (18) is provided between the gearing housing (16), the vat inner wall (68) and the underside (70), in which intermediate space (18) the toothed wheel rim (52) and the toothed wheel (60) for the mixing implement (30) are arranged.
2. An annular vat mixer according to claim 1, characterised in that the toothing (54) of the toothed wheel rim (52) is formed as an internal toothing.
3. An annular vat mixer according to claim 1 or 2, characterised in that the toothed wheel rim (52) is flange-mounted on a separate receiving device.
4. An annular vat mixer according to any one of claims 1 to 3, characterised in that a sealing device (72) is arranged between the upper edge of the annular vat mixer (68) and the underside (70) of the rotor, which sealing device is formed as a labyrinth seal or comprises a sealing ring (76) having sealing lips or the like.
5. An annular vat mixer according to claim 4, characterised in that the sealing device (72) comprises two rings (74, 76), which are coaxial to the drive shaft (20), and between which the upper edge of the vat inner wall (68) or the associated component parts project.
EP82102539A 1981-04-10 1982-03-26 Mixer with annular vat Expired EP0063257B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3114477A DE3114477C1 (en) 1981-04-10 1981-04-10 Ring trough compulsory mixer
DE3114477 1981-04-10

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EP0063257A2 EP0063257A2 (en) 1982-10-27
EP0063257A3 EP0063257A3 (en) 1984-05-30
EP0063257B1 true EP0063257B1 (en) 1986-11-05

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DE3524537A1 (en) * 1985-07-10 1987-01-22 Badische Maschf Gmbh DEVICE FOR MIXING SOLIDS AND LIQUIDS
DE3608201A1 (en) * 1986-03-12 1987-09-17 Walter Stahl Mixer
DE3727010A1 (en) * 1987-08-13 1989-02-23 Infors Gmbh WATER BATH SCHUETTLER
DE4100928A1 (en) * 1991-01-15 1992-07-16 Harald Kniele Planetary motion mixing machine for concrete mfr. - comprises circular mixing section, and spinner propelled via agitator drive for efficient mixing
IT1244970B (en) * 1991-04-09 1994-09-13 Piccini Spa REDUCTION UNIT FOR "PLANETARY" TYPE MIXERS.
DE4210888A1 (en) * 1992-04-02 1993-10-07 Braun Ag Impact and mixing device for a multi-purpose kitchen machine
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DE4212937C2 (en) * 1992-04-18 1994-04-14 Walter Stahl mixer
DE4344178C1 (en) * 1993-12-23 1995-02-02 Walter Stahl Mixer
DE9412699U1 (en) 1994-08-05 1995-12-07 Liebherr-Mischtechnik Gmbh, 88427 Bad Schussenried Ring carrier positive mixer
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EP0063257A2 (en) 1982-10-27
DE3274070D1 (en) 1986-12-11
EP0063257A3 (en) 1984-05-30
DE3114477C1 (en) 1982-11-04

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