EP1335790A1 - Device for mixing a flowable or pourable medium, especially a highly viscous medium - Google Patents

Device for mixing a flowable or pourable medium, especially a highly viscous medium

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Publication number
EP1335790A1
EP1335790A1 EP01997344A EP01997344A EP1335790A1 EP 1335790 A1 EP1335790 A1 EP 1335790A1 EP 01997344 A EP01997344 A EP 01997344A EP 01997344 A EP01997344 A EP 01997344A EP 1335790 A1 EP1335790 A1 EP 1335790A1
Authority
EP
European Patent Office
Prior art keywords
stirring
medium
stirring elements
spiral
elements
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
EP01997344A
Other languages
German (de)
French (fr)
Other versions
EP1335790B1 (en
Inventor
Hans Weber
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.)
Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
Original Assignee
Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inotec GmbH Transport und Foerdersysteme, Inotec GmbH filed Critical Inotec GmbH Transport und Foerdersysteme
Publication of EP1335790A1 publication Critical patent/EP1335790A1/en
Application granted granted Critical
Publication of EP1335790B1 publication Critical patent/EP1335790B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/118—Stirrers in the form of brushes, sieves, grids, chains or springs
    • 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
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/15—Stirrers with tubes for guiding the material

Definitions

  • the invention relates to a device for stirring a flowable or free-flowing medium, in particular a highly viscous medium, according to the preamble of claim 1.
  • the stirring device according to the invention can be used and is suitable for low to high viscosity fluids.
  • the particular area of application is for very highly viscous fluids.
  • the stirring device according to the invention is suitable for free-flowing solids.
  • the stirring device of the type specified is known from DE 39 01 894 C2.
  • This stirring device in particular for highly viscous media, has a container holding the medium, in which a rotatable shaft is arranged vertically. At the lower end of this shaft support arms go off approximately in the radial direction.
  • stirring elements at the front ends of these support arms. These are tubular in shape with a closed lateral surface, the end faces of the tube being open in each case. These tubular elements are conical over a partial length range, the end face with the larger cross section pointing in the circumferential direction.
  • the central axes of the stirring elements are inclined with respect to the plane of rotation.
  • the basic principle of this known stirring device is that the stirring elements are flowed through during the rotary movement of the shaft. Due to the inclination of the stirring elements, the medium in the container is set into a circular movement.
  • the invention is based on the object of further developing the stirring device of the type specified at the outset in such a way that even very highly viscous media can be stirred without any grafting forming in the stirring elements.
  • the stirrer according to the invention has a broader range of applications with regard to its mode of operation.
  • very highly viscous media can also be stirred with the stirring device according to the invention without the risk of plug formation.
  • the field of application of the stirring device according to the invention is therefore in particular in the area of higher-viscosity media.
  • Suspensions with very high solids contents as well as pasty media can also be processed very well with the stirring device, in a very product-friendly manner. This allows a very good stirring result to be achieved with very little energy consumption and with very short stirring phases, even in geometrically difficult containers, and in a way that is gentle on the product.
  • the stirring system With a low starting torque and low speed of the stirring elements, the stirring system produces excellent mixing effects even with laminar flow.
  • This mixing effect is essentially achieved by two flow components: on the one hand, a differential flow between the central inlet jet and the outer jet on the one hand, and the exit jet of the conical displacer on the other, and on the other hand through the radial flow passing through the openings, which is caused by the dynamic pressure in the displacer cone.
  • the medium in the main jet is thus conveyed upwards and tangentially to the container wall due to the inclination of the stirring elements.
  • the dynamic pressure in the conical stirring element results in a radial jet which is approximately at right angles to the displacement axis.
  • the stirring system according to the invention differs technically from the conventional stirring systems mainly in substantially lower circulation speeds and thus in a significantly lower power requirement, and this with higher stirring effectiveness. Due to the hydraulically generated swirls in different directions, the agitator rotation is also avoided, ie the power consumed is used exclusively to generate hydraulic swirls. Energy is not destroyed by elements that disturb the current.
  • the development according to claim 2 has the advantage that due to the rotational symmetry of the openings in the stirring elements, the radial flow takes place uniformly all around and thus also has a wide-ranging effect.
  • the openings are designed as slots in the jacket of the stirring elements, a large radial passage area is thereby created.
  • the slots can in particular be circumferential.
  • the development according to claim 4 suggests a preferred embodiment of the stirring elements and thus the openings.
  • the basic idea is to define the outer surface of the cone shape by means of a spiral helix (or helical spiral). This creates a very open structure, namely a spiral structure, through which plug formation can escape essentially radially through the spaces between the spiral windings.
  • this spiral-shaped stirring element is also technically very easy to produce.
  • the advantage of the development according to claim 5 is that this creates an optimal relationship between the axially continuous medium and the radially flowing medium.
  • the development according to claim 6 has the advantage that the unit consisting of the support arm and stirring element can be produced technically very simply from a single piece, namely a single wire, the thickness of the support arm being equal to the thickness of the spiral turns.
  • Figure 1 is a schematic representation of the stirring device with flow pattern.
  • FIG. 2 shows a plan view of the stirring device in FIG. 1;
  • Fig. 3 shows a longitudinal section through a stirring element in the to be stirred
  • FIG. 4 shows an end view of the stirring element in FIG. 3.
  • the stirring device has a cylindrical container 1.
  • a shaft 2 dips into the container 1 from above. This has at its upper end a coupling 3, which allows the connection of the shaft 2 to a drive motor, not shown.
  • the shaft 2 is arranged vertically. Likewise, it is also conceivable that the shaft 2 extends obliquely.
  • a stirring element 5 is arranged at the front end of each of the support arms 4.
  • the stirring elements 5 are formed by a helical spiral 6. This helical spiral 6 forms the outer surface of a truncated cone. The turns of the spiral 6 define openings 7 between them. The cone is open on each of the two end faces. As can be seen in FIG.
  • the central axis M of the spiral 6 is inclined with respect to the plane of rotation of the stirring elements 5 by the angle of inclination ⁇ .
  • the support arm 4 is formed in one piece with the spiral 6 of the associated stirring element 5.
  • the distances of the stirring elements 5 from the shaft 2 are the same, ie the four support arm / stirring element combinations are each identical.
  • the stirring device works as follows:
  • the stirring elements 5 are set into a rotary movement via the support arms 4.
  • the face with the larger cross-section points in the circumferential direction.
  • the mixing effect is essentially achieved by two flow components which are formed by the aforementioned flow components.
  • the second flow component is the radial flow V4, in that the back pressure prevailing in the spiral 6 leads the medium to the outside through the openings 7 between the spiral turns.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Dairy Products (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A device for mixing a flowable or pourable medium has a container for receiving the medium and a rotatable shaft having radially projecting support arms and rotatable in a direction of rotation. Mixing elements are connected to the radially projecting support arms. The mixing elements are tubular and formed as coil-shaped spirals conically shaped at least across a partial length of the coil-shaped spirals. The coil-shaped spirals have a first end face and a second end face. The first end face points in the direction of rotation and has a cross-section greater than the cross-section of the second end face. The coil-shaped spirals have a central axis having a slant angle relative to a plane of rotation of the two mixing elements. The support arms and the coil-shaped spirals connected to the support arms, respectively, are formed of a single wire as a monolithic part, respectively.

Description

Vorrichtung zum Rühren eines strömungsfähigen oder rieselfähigen Mediums, insbesondere eines hochviskosen Mediums Device for stirring a fluid or free-flowing medium, in particular a highly viscous medium
Die Erfindung betrifft eine Vorrichtung zum Rühren eines strömungsfähigen oder rieselfähigen Mediums, insbesondere eines hochviskosen Mediums, nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for stirring a flowable or free-flowing medium, in particular a highly viscous medium, according to the preamble of claim 1.
Die erfindungsgemäße Rührvorrichtung ist für niedrig- bis hochviskose Fluide einsetzbar und geeignet. Das besondere Anwendungsgebiet liegt dabei für sehr hochviskose Fluide. Außerdem ist die erfindungsgemäße Rührvorrichtung für rieselfähige Feststoffe geeignet.The stirring device according to the invention can be used and is suitable for low to high viscosity fluids. The particular area of application is for very highly viscous fluids. In addition, the stirring device according to the invention is suitable for free-flowing solids.
Die Rührvorrichtung der eingangs angegebenen Art ist aus der DE 39 01 894 C2 bekannt. Diese Rührvorrichtung insbesondere für hochviskose Medien weist einen das Medium aufnehmenden Behälter auf, in dem vertikal eine drehbare Welle angeordnet ist. Am unteren Ende dieser Welle gehen etwa in radialer Richtung Tragarme ab. An den vorderen Enden dieser Tragarme befinden sich Rührelemente. Diese sind rohrförmig mit einer geschlossenen Mantelfläche ausgebildet, wobei die Stirnseiten des Rohres jeweils offen sind. Über einen Teillängenbereich sind diese Rohrelemente konisch ausgebildet, wobei die Stirnseite mit dem größeren Querschnitt in Umlaufrichtung zeigt. Die Mittelachsen der Rührelemente sind bezüglich der Drehebene geneigt. Das Grundprinzip dieser bekannten Rührvorrichtung besteht darin, daß die Rührelemente während der Drehbewegung der Welle durchströmt werden. Aufgrund der Neigung der Rührelemente wird das in dem Behälter befindliche Medium in eine Zirkularbewegung versetzt.The stirring device of the type specified is known from DE 39 01 894 C2. This stirring device, in particular for highly viscous media, has a container holding the medium, in which a rotatable shaft is arranged vertically. At the lower end of this shaft support arms go off approximately in the radial direction. There are stirring elements at the front ends of these support arms. These are tubular in shape with a closed lateral surface, the end faces of the tube being open in each case. These tubular elements are conical over a partial length range, the end face with the larger cross section pointing in the circumferential direction. The central axes of the stirring elements are inclined with respect to the plane of rotation. The basic principle of this known stirring device is that the stirring elements are flowed through during the rotary movement of the shaft. Due to the inclination of the stirring elements, the medium in the container is set into a circular movement.
Insbesondere bei sehr hochviskosen Medien besteht bei dieser bekannten Rührvorrichtung die Gefahr, daß sich innerhalb des konusförmigen Rührelements ein Pfropfen bildet, so daß das Rührelement nicht mehr durchströmt werden kann. Dadurch ist der Rührerfolg massiv beeinträchtigt.Particularly in the case of very highly viscous media, there is a risk with this known stirring device that a plug forms within the conical stirring element, so that the stirring element can no longer be flowed through. As a result, the stirring success is massively impaired.
Davon ausgehend liegt der Erfindung die A u f g a b e zugrunde, die Rührvorrichtung der eingangs angegebenen Art derart weiterzuentwickeln, daß auch sehr hochviskose Medien gerührt werden können, ohne daß sich in den Rührelementen Pfropfen bilden.Proceeding from this, the invention is based on the object of further developing the stirring device of the type specified at the outset in such a way that even very highly viscous media can be stirred without any grafting forming in the stirring elements.
Die technische L ö s u n g ist gekennzeichnet durch die Merkmale im Kennzeichen des Anspruchs 1. Bezüglich der gattungsbildenden Rührvorrichtung aus dem Stand der Technik hat die erfindungsgemäße Rührvorrichtung hinsichtlich ihrer Wirkungsweise ein breiteres Anwendungsspektrum. So sind mit der erfindungsgemäßen Rührvorrichtung auch sehr hochviskose Medien rührbar, ohne daß die Gefahr der Pfropfenbildung besteht. Somit liegt das Einsatzgebiet der erfindungsgemäßen Rührvorrichtung insbesondere im Bereich höher viskoser Medien. Auch Suspensionen mit sehr hohen Feststoffanteilen sowie pastöse Medien lassen sich mit der Rührvorrichtung sehr gut verarbeiten, und zwar in sehr produktschonender Art und Weise. Dadurch läßt sich mit einem sehr geringen Energieeinsatz sowie mit sehr kurzen Rührphasen selbst in geometrisch schwierigen Behältern sowie produktschonend ein sehr gutes Rührergebnis erzielen. Das Rührsystem erzeugt bei geringem Anlaufmoment und geringer Drehzahl der Rührelemente schon bei laminarer Strömung hervorragende Mischeffekte. Erzielt wird dieser Mischeffekt im wesentlichen durch zwei Strömungskomponenten: Zum einen eine Differenzströmung zwischen einerseits dem mittigen Eintrittsstrahl sowie dem Außenstrahl und andererseits dem Austrittsstrahl des konischen Verdrängers sowie zum anderen durch die durch die Durchbrechungen hindurchgehende Radialströmung, welche durch den Staudruck in dem Verdrängerkonus verursacht ist. Somit wird durch die Neigung der Rührelemente das Medium im Hauptstrahl aus dem Mittelbereich nach oben und tangential zur Behälterwand gefördert. Gleichzeitig ergibt sich durch den Staudruck im konischen Rührelement ein Radialstrahl, welcher annähernd rechtwinklig zur Verdrängerachse verläuft. Somit unterscheidet sich das erfindungsgemäße Rührsystem technisch von den herkömmlichen Rührsystemen hauptsächlich in wesentlich niedrigeren Umlaufgeschwindigkeiten und somit in einem wesentlich niedrigeren Leistungsbedarf, und dies bei höherer Rühreffektivität. Durch die hydraulisch erzeugten Verwirbelungen in verschiedenen Richtungen wird außerdem die Rührgutrotation vermieden, d.h. die aufgenommene Leistung dient ausschließlich der Erzeugung hydraulischer Wirbel. Eine Energievernichtung durch stromstörende Elemente findet hierbei nicht statt.The technical solution is characterized by the features in the characterizing part of claim 1. With regard to the generic stirrer from the prior art, the stirrer according to the invention has a broader range of applications with regard to its mode of operation. Thus, very highly viscous media can also be stirred with the stirring device according to the invention without the risk of plug formation. The field of application of the stirring device according to the invention is therefore in particular in the area of higher-viscosity media. Suspensions with very high solids contents as well as pasty media can also be processed very well with the stirring device, in a very product-friendly manner. This allows a very good stirring result to be achieved with very little energy consumption and with very short stirring phases, even in geometrically difficult containers, and in a way that is gentle on the product. With a low starting torque and low speed of the stirring elements, the stirring system produces excellent mixing effects even with laminar flow. This mixing effect is essentially achieved by two flow components: on the one hand, a differential flow between the central inlet jet and the outer jet on the one hand, and the exit jet of the conical displacer on the other, and on the other hand through the radial flow passing through the openings, which is caused by the dynamic pressure in the displacer cone. The medium in the main jet is thus conveyed upwards and tangentially to the container wall due to the inclination of the stirring elements. At the same time, the dynamic pressure in the conical stirring element results in a radial jet which is approximately at right angles to the displacement axis. Thus, the stirring system according to the invention differs technically from the conventional stirring systems mainly in substantially lower circulation speeds and thus in a significantly lower power requirement, and this with higher stirring effectiveness. Due to the hydraulically generated swirls in different directions, the agitator rotation is also avoided, ie the power consumed is used exclusively to generate hydraulic swirls. Energy is not destroyed by elements that disturb the current.
Die Weiterbildung gemäß Anspruch 2 hat den Vorteil, daß durch die Rotationssymmetrie der Durchbrechungen in den Rührelementen die Radialströmung rundum gleichmäßig erfolgt und somit auch weiträumig wirkt.The development according to claim 2 has the advantage that due to the rotational symmetry of the openings in the stirring elements, the radial flow takes place uniformly all around and thus also has a wide-ranging effect.
Indem gemäß der Weiterbildung in Anspruch 3 die Durchbrechungen als Schlitze im Mantel der Rührelemente ausgebildet sind, wird dadurch eine große radiale Durchtrittsfläche geschaffen. Die Schlitze können dabei insbesondere umlaufend sein.In that, according to the development in claim 3, the openings are designed as slots in the jacket of the stirring elements, a large radial passage area is thereby created. The slots can in particular be circumferential.
Eine bevorzugte Ausbildung der Rührelemente und damit der Durchbrechungen schlägt die Weiterbildung gemäß Anspruch 4 vor. Die Grundidee besteht darin, die Mantelfläche der Konusform durch eine spiralförmige Wendel (oder wendeiförmige Spirale) zu definieren. Dadurch ist eine sehr offene Struktur, nämlich eine Spiralstruktur geschaffen, durch die hindurch Pfropfenbildungen im wesentlichen radial durch die Zwischenräume zwischen den Spiralwindungen entweichen können. Neben diesen verfahrensbedingten Vorteilen läßt sich dieses Rührelement in Spiralform auch technisch sehr einfach herstellen.The development according to claim 4 suggests a preferred embodiment of the stirring elements and thus the openings. The basic idea is to define the outer surface of the cone shape by means of a spiral helix (or helical spiral). This creates a very open structure, namely a spiral structure, through which plug formation can escape essentially radially through the spaces between the spiral windings. In addition to these process-related advantages, this spiral-shaped stirring element is also technically very easy to produce.
Der Vorteil der Weiterbildung gemäß Anspruch 5 besteht darin, daß dadurch ein optimales Verhältnis zwischen dem axial durchgehenden Medium und dem radial abfließenden Medium geschaffen ist.The advantage of the development according to claim 5 is that this creates an optimal relationship between the axially continuous medium and the radially flowing medium.
Die Weiterbildung gemäß Anspruch 6 hat den Vorteil, daß sich die Einheit aus Tragarm und Rührelment technisch sehr einfach aus einem einzigen Stück, nämlich einem einzigen Draht herstellen läßt, wobei die Dicke des Tragarms gleich der Dicke der Spiralwindungen ist .The development according to claim 6 has the advantage that the unit consisting of the support arm and stirring element can be produced technically very simply from a single piece, namely a single wire, the thickness of the support arm being equal to the thickness of the spiral turns.
Die Weiterbildung gemäß Anspruch 7 mit der Neigung der Rührelemente bezüglich der Drehebene schafft einen optimalen umlaufenden Rührstrom. Dies gilt gleichermaßen auch für die Weiterbildungen der Ansprüche 8 bis 10.The development according to claim 7 with the inclination of the stirring elements with respect to the plane of rotation creates an optimal circulating stirring current. This also applies to the developments of claims 8 to 10.
Ein Ausführungsbeispiel einer erfindungsgemäßen Rührvorrichtung wird nachfolgend anhand der Zeichnungen beschrieben. In diesen zeigt:An embodiment of a stirring device according to the invention is described below with reference to the drawings. In these shows:
Fig. 1 eine schematische Darstellung der Rührvorrichtung mit Strömungsbild;Figure 1 is a schematic representation of the stirring device with flow pattern.
Fig. 2 eine Draufsicht auf die Rührvorrichtung in Fig. 1;FIG. 2 shows a plan view of the stirring device in FIG. 1;
Fig. 3 einen Längsschnitt durch ein Rührelement im zu rührendenFig. 3 shows a longitudinal section through a stirring element in the to be stirred
Medium bei geringem Anlaufdrehmoment mit laminarer Strömung;Medium with low starting torque with laminar flow;
Fig. 4 eine Stirnansicht des Rührelements in Fig. 3.4 shows an end view of the stirring element in FIG. 3.
Die Rührvorrichtung weist einen zylinderförmigen Behälter 1 auf. Von oben taucht in den Behälter 1 eine Welle 2 ein. Diese weist an ihrem oberen Ende eine Kupplung 3 auf, welche den Anschluß der Welle 2 an einen nicht dargestellten Antriebsmotor gestattet. Im dargestellten Ausführungsbeispiel ist die Welle 2 vertikal angeordnet. Gleichermaßen ist es aber auch denkbar, daß die Welle 2 schräg verläuft. Am unteren Ende der Welle 2 gehen vier drahtartige Tragarme 4 radial ab. Am vorderen Ende eines jeden der Tragarme 4 ist jeweils ein Rührelement 5 angeordnet. Die Rührelemente 5 sind durch eine wendeiförmige Spirale 6 gebildet. Diese wendeiförmige Spirale 6 bildet dabei die Mantelfläche eines Kegelstumpfes. Die Windungen der Spirale 6 definieren zwischen sich Durchbrechungen 7. An den beiden Stirnseiten ist der Konus jeweils offen. Wie in Fig. 3 erkennbar ist, ist die Mittelachse M der Spirale 6 bezüglich der Drehebene der Rührelemente 5 um den Neigungswinkel α geneigt. Der Tragarm 4 ist mit der Spirale 6 des zugehörigen Rührelements 5 jeweils einstückig ausgebildet. Außerdem sind die Abstände der Rührelemente 5 von der Welle 2 jeweils gleich, d.h. die vier Tragarm/Rührelement- Kombinationen sind jeweils identisch ausgebildet.The stirring device has a cylindrical container 1. A shaft 2 dips into the container 1 from above. This has at its upper end a coupling 3, which allows the connection of the shaft 2 to a drive motor, not shown. In the illustrated embodiment, the shaft 2 is arranged vertically. Likewise, it is also conceivable that the shaft 2 extends obliquely. At the lower end of the shaft 2, four wire-like support arms 4 extend radially. A stirring element 5 is arranged at the front end of each of the support arms 4. The stirring elements 5 are formed by a helical spiral 6. This helical spiral 6 forms the outer surface of a truncated cone. The turns of the spiral 6 define openings 7 between them. The cone is open on each of the two end faces. As can be seen in FIG. 3, the central axis M of the spiral 6 is inclined with respect to the plane of rotation of the stirring elements 5 by the angle of inclination α. The support arm 4 is formed in one piece with the spiral 6 of the associated stirring element 5. In addition, the distances of the stirring elements 5 from the shaft 2 are the same, ie the four support arm / stirring element combinations are each identical.
Die Funktionsweise der Rührvorrichtung ist wie folgt:The stirring device works as follows:
Durch Drehen der Welle 2 werden über die Tragarme 4 die Rührelemente 5 in eine Drehbewegung versetzt. Dabei zeigt die Stirnfläche mit dem größeren Querschnitt in Umlaufrichtung.By rotating the shaft 2, the stirring elements 5 are set into a rotary movement via the support arms 4. The face with the larger cross-section points in the circumferential direction.
Es entstehen während dieser Umlaufbewegung der Rührelemente 5 verschiedene Strömungsanteile, wie den Fig. 3 und 4 entnehmbar ist. Die zentrale Strömung V1 dringt mit einer laminaren Strömung in den Konus der Spirale 6 des Rührelements 5 ein. Ein weiterer Strömungsanteil V3 wird von der Stirnkante der Spirale 6 nach außen abgelenkt. Der Strömungsanteil V5 im Außenbereich wird um die Spirale 6 außen herumgeführt.During this orbital movement of the stirring elements, 5 different flow components arise, as can be seen in FIGS. 3 and 4. The central flow V1 penetrates into the cone of the spiral 6 of the stirring element 5 with a laminar flow. Another flow component V3 is deflected outwards from the end edge of the spiral 6. The flow component V5 in the outer region is guided around the spiral 6 on the outside.
Erzielt wird der Mischeffekt im wesentlichen durch zwei Strömungskomponenten, welche durch die vorgenannten Strömungsanteile gebildet werden. Zunächst entsteht eine Differenzströmung zwischen den Strömungsanteilen V1, V3, V5 und dem Strömungsanteil V2 im Austrittsstrahl. Die zweite Strömungskomponente ist die Radialströmung V4, indem durch den in der Spirale 6 herrschenden Staudruck das Medium durch die Durchbrechungen 7 zwischen den Spiralwindungen nach außen abgeleitet wird.The mixing effect is essentially achieved by two flow components which are formed by the aforementioned flow components. First, there is a differential flow between the flow components V1, V3, V5 and the flow component V2 in the exit jet. The second flow component is the radial flow V4, in that the back pressure prevailing in the spiral 6 leads the medium to the outside through the openings 7 between the spiral turns.
Wie in Fig. 1 erkennbar ist, resultiert aus der Neigung der Rührelemente 5 eine kontinuierliche, geschlossene Zirkularströmung Z, welche in der Nähe der Behälterwand nach oben steigt und im Mittelbereich des Behälters 1 koaxial zur Welle 2 wieder nach unten strebt, wo sie die Zwischenräume zwischen den Tragarmen 4 durchquert. Die Intensität hängt dabei von der Größe des Neigungswinkels α ab. BezugszeichenlisteAs can be seen in Fig. 1, the inclination of the stirring elements 5 results in a continuous, closed circular flow Z, which rises in the vicinity of the container wall and in the central region of the container 1 coaxially to the shaft 2, where it stretches the spaces crosses between the support arms 4. The intensity depends on the size of the angle of inclination α. LIST OF REFERENCE NUMBERS
1 Behälter1 container
2 Welle2 wave
3 Kupplung3 clutch
4 Tragarm4 support arm
5 Rührelement5 stirring element
6 Spirale6 spiral
7 Durchbrechung7 breakthrough
α Neigungswinkelα angle of inclination
M MittelachseM central axis
V1 -V5 StrömungV1 -V5 flow
Z Zirkularströmung Z circular flow

Claims

A n s p r ü c h e Expectations
1. Vorrichtung zum Rühren eines strömungsfähigen oder rieselfähigen Mediums, insbesondere eines hochviskosen Mediums, mit einem das Medium aufnehmenden Behälter (1) sowie mit wenigstens zwei, an einer drehbaren Welle (2) an im wesentlichen radial abstehenden Tragarmen (4) angeordneten Rührelementen (5), wobei die Rührelemente (5) rohrförmig mit offenen Stirnseiten sowie zumindest über einen Teillängenbereich konisch ausgebildet sind und dabei die in Umlaufrichtung weisende Stirnseite den größeren Querschnitt sowie die Mittelachse (M) bezüglich der Drehebene einen Neigungswinkel ( ) aufweist, d a d u r c h g e k e n n z e i c h n e t, daß der Mantel der Rührelemente (5) Durchbrechungen (7) aufweist.1. Device for stirring a flowable or free-flowing medium, in particular a highly viscous medium, with a container (1) holding the medium and with at least two stirring elements (5) arranged on a rotatable shaft (2) on essentially radially projecting support arms (4) ), the stirring elements (5) being tubular with open end faces and conical at least over a partial length range, and the end face pointing in the circumferential direction has the larger cross section and the central axis (M) has an angle of inclination () with respect to the plane of rotation, characterized in that the jacket the stirring elements (5) have openings (7).
2. Vorrichtung nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß die Durchbrechungen (7) um den gesamten Umfang sowie über die gesamte Länge des Mantels rotationssymmetrisch angeordnet sind.2. Device according to the preceding claim, characterized in that the openings (7) are arranged rotationally symmetrically around the entire circumference and over the entire length of the jacket.
3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Durchbrechungen (7) als Schlitze ausgebildet sind.3. Device according to one of the preceding claims, characterized in that the openings (7) are designed as slots.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Rührelement (5) die Form einer schraubenförmigen Spirale (6) aufweist.4. Device according to one of the preceding claims, characterized in that the stirring element (5) has the shape of a helical spiral (6).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Dicke des Drahtes der Spirale (6) etwa dem Abstand zwischen zwei Windungen der Spirale (6) entspricht.5. The device according to claim 4, characterized in that the thickness of the wire of the spiral (6) corresponds approximately to the distance between two turns of the spiral (6).
6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Tragarm (4) einstückig mit der Spirale (6) ausgebildet ist. 6. The device according to claim 4 or 5, characterized in that the support arm (4) is integrally formed with the spiral (6).
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Neigungswinkel (α) der Mittelachse (M) der Rührelemente (5) 10° bis 20° beträgt.7. Device according to one of the preceding claims, characterized in that the angle of inclination (α) of the central axis (M) of the stirring elements (5) is 10 ° to 20 °.
8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Verhältnis von Eintrittsquerschnitt und Austrittsquerschnitt der Rührelemente (5) zwischen 1,5 und 3,0 liegt.8. Device according to one of the preceding claims, characterized in that the ratio of the inlet cross section and the outlet cross section of the stirring elements (5) is between 1.5 and 3.0.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rührelemente (5) im unteren Drittel des Behälters (1) angeordnet sind.9. Device according to one of the preceding claims, characterized in that the stirring elements (5) are arranged in the lower third of the container (1).
10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rührelemente (5) von dem zu rührenden Medium im wesentlichen laminar durchströmt werden. 10. Device according to one of the preceding claims, characterized in that the stirring elements (5) are flowed through by the medium to be stirred essentially laminar.
EP01997344A 2000-11-23 2001-11-15 Device for mixing a flowable or pourable medium, especially a highly viscous medium Expired - Lifetime EP1335790B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20019941U DE20019941U1 (en) 2000-11-23 2000-11-23 Device for stirring a fluid or free-flowing medium, in particular a highly viscous medium
DE20019941U 2000-11-23
PCT/DE2001/004304 WO2002041982A1 (en) 2000-11-23 2001-11-15 Device for mixing a flowable or pourable medium, especially a highly viscous medium

Publications (2)

Publication Number Publication Date
EP1335790A1 true EP1335790A1 (en) 2003-08-20
EP1335790B1 EP1335790B1 (en) 2004-07-28

Family

ID=7949230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01997344A Expired - Lifetime EP1335790B1 (en) 2000-11-23 2001-11-15 Device for mixing a flowable or pourable medium, especially a highly viscous medium

Country Status (14)

Country Link
US (1) US6921194B2 (en)
EP (1) EP1335790B1 (en)
JP (1) JP4078601B2 (en)
KR (1) KR100527256B1 (en)
CN (1) CN1230244C (en)
AT (1) ATE271916T1 (en)
CA (1) CA2422173C (en)
DE (2) DE20019941U1 (en)
DK (1) DK1335790T3 (en)
ES (1) ES2225648T3 (en)
PL (1) PL198527B1 (en)
PT (1) PT1335790E (en)
TR (1) TR200402537T4 (en)
WO (1) WO2002041982A1 (en)

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DE20303151U1 (en) 2003-02-27 2003-04-30 INOTEC GmbH Transport- und Fördersysteme, 79761 Waldshut-Tiengen Stirring unit for viscous medium, comprises rotatable shaft and conical stirring element in form of thread shaped spiral
US8439554B2 (en) * 2006-07-13 2013-05-14 Randy Kaas Whisk attachment
DE102008005017B3 (en) * 2008-01-17 2009-03-12 INOTEC GmbH Transport- und Fördersysteme Stirrer and agitator for mixing and / or homogenizing fluid media
KR101063705B1 (en) 2008-12-01 2011-09-07 현대자동차주식회사 Paint Mixing Equipment
DE102008063393B3 (en) * 2008-12-30 2010-06-02 Martin Hirzel Bördelrührer
DE102009021079B3 (en) * 2009-05-13 2010-11-25 Schottmüller, Horst, Dipl.-Ing. (FH) Hollow body agitator for agitating and mixing e.g. suspensions with high fibrous solids, has hollow bodies with continuous slot in lateral surfaces in longitudinal direction and inlet surfaces inclined to horizontal with same angle
CN102459562B (en) 2009-05-20 2018-01-26 希乐克公司 Processing biomass
ITVI20100008A1 (en) * 2010-01-21 2011-07-22 Revelin Evaristo & Figli Snc PERFECT MIXER
DE102010049034B4 (en) * 2010-10-21 2012-11-22 VISCO JET Rührsysteme GmbH Stirrer and agitator for mixing and / or homogenizing fluid media
CN102091549B (en) * 2010-12-24 2012-11-21 东莞徐记食品有限公司 Mixing stirring machine
DE102011015316B4 (en) 2011-03-28 2016-09-15 VISCO JET Rührsysteme GmbH Agitator for mixing and / or homogenizing fluid media
CN103170279A (en) * 2013-03-27 2013-06-26 印峰 Improved stirring blades for stirrer
FR3068618B1 (en) * 2017-07-10 2022-01-28 Fillon Technologies FLUID AGITATION DEVICE EQUIPPED WITH SUCH AN AGITATION DEVICE
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Also Published As

Publication number Publication date
DE20019941U1 (en) 2001-02-22
TR200402537T4 (en) 2004-12-21
CN1230244C (en) 2005-12-07
DK1335790T3 (en) 2004-12-06
PL360080A1 (en) 2004-09-06
WO2002041982A1 (en) 2002-05-30
JP4078601B2 (en) 2008-04-23
CA2422173C (en) 2006-09-19
CA2422173A1 (en) 2003-03-12
US6921194B2 (en) 2005-07-26
ATE271916T1 (en) 2004-08-15
CN1466484A (en) 2004-01-07
US20040037163A1 (en) 2004-02-26
PT1335790E (en) 2004-10-29
KR20030059123A (en) 2003-07-07
JP2004513776A (en) 2004-05-13
EP1335790B1 (en) 2004-07-28
DE50103041D1 (en) 2004-09-02
KR100527256B1 (en) 2005-11-09
PL198527B1 (en) 2008-06-30
ES2225648T3 (en) 2005-03-16

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