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DE102013006816A1 - Change in the arrangement of stirring bars in agitators and mixers - Google Patents

Change in the arrangement of stirring bars in agitators and mixers Download PDF

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DE102013006816A1
DE102013006816A1 DE102013006816.9A DE102013006816A DE102013006816A1 DE 102013006816 A1 DE102013006816 A1 DE 102013006816A1 DE 102013006816 A DE102013006816 A DE 102013006816A DE 102013006816 A1 DE102013006816 A1 DE 102013006816A1
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rotation
agitators
mixers
arrangement
change
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DE102013006816B4 (en
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Anmelder Gleich
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    • 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
    • B01F27/13—Openwork frame or cage stirrers not provided for in other groups of this subclass

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Die Erfindung betrifft Rührwerkstäbe bei Rührwerken und Mixern. Die Rührstäbe sind so angeordnet, dass sie untereinander einen ungleichen axialen Abstand zur Drehachse aufweisen und sinusförmig gewellt sind.The invention relates to agitator rods in agitators and mixers. The stirring rods are arranged so that they have an unequal axial distance from one another with respect to the axis of rotation and are sinusoidally corrugated.

Figure DE102013006816A1_0001
Figure DE102013006816A1_0001

Description

Die Rührstäbe eines Rührwerkes sind gerade, leicht gebogen, gewendelt oder in der Länge sinusförmig gewellt. Die Anzahl und Länge der Rührwerkstäbe sind ein entscheidender Faktor für die Erzielung des Mix- bzw. Rührergebnisses in einer bestimmten Zeiteinheit. Die Anzahl und Länge der Rührstäbe ist auf Grund der Größe des Rührgefäßes und die Anzahl hintereinander liegender Rührstäbe in Drehrichtung begrenzt. Außerdem stehen diese in Abhängigkeit der Konsistenz des Rührgutes. Bekannt ist, dass die Stäbe aus Rund- oder Flachmaterial hergestellt sind. Das Rundmaterial und in Drehrichtung stehende Flachmaterial ist strömungstechnisch ungünstig. Sie sind in Drehrichtung axial hintereinander liegend angeordnet.The stirrers of a stirrer are straight, slightly curved, coiled or sinusoidally wavy in length. The number and length of the stirrer bars are a decisive factor in achieving the mixing or stirring result in a certain time unit. The number and length of the stirring rods is limited due to the size of the mixing vessel and the number of successive stirring rods in the direction of rotation. In addition, these are dependent on the consistency of the material to be stirred. It is known that the rods are made of round or flat material. The round material and standing in the direction of rotation flat material is aerodynamically unfavorable. They are arranged axially one behind the other in the direction of rotation.

Die Aufgabe besteht darin, dass die Rührstäbe unabhängig von ihrer Form, Material und Gestaltung in Drehrichtung nicht im gleichen axialen Abstand zum Drehmittelpunkt stehen und damit in der Drehbewegung in die Verwirbelung des Vorstabes folgen. Das bedeutet, dass die Rührstäbe jeweils mindestens um eine Materialstärke des Rührstabes im Radius zum Drehmittelpunkt 1 verringert oder je nach Lesart vergrößert zu dem anderen Rührstab ausgebildet werden, um diesen Nachteil zu beseitigen. Bei sinusförmig ausgebildeten Rührstäben kann zusätzlich ein Materialstärkenversatz vertikal erfolgen. Vorteil hafter Weise sollte ein Bogenversatz von einem viertel bis einem halben Bogenmaß 2 zum Vorstab erfolgen. Das Material der Rührstäbe sollte vorzugsweise aus in Richtung der Drehrichtung stehendem Flachmaterial bestehen, also die Breitseite in Drehrichtung ausgerichtet sein. Bei nicht paarweiser Verwendung von Rührstäben eines Rührwerkes muss bei eventuell hoher Drehzahl durch Masseausgleich für ausgewuchteten Lauf gesorgt werden.The task is that the stirring rods, regardless of their shape, material and design in the direction of rotation are not at the same axial distance from the center of rotation and thus follow in the rotational movement in the turbulence of the Vorstabes. This means that the stirring rods are each at least one material thickness of the stirring rod in radius to the center of rotation 1 reduced or, depending on the reading enlarged to be formed to the other stirring rod to eliminate this disadvantage. In the case of sinusoidally shaped stirring bars, a material thickness offset can additionally take place vertically. Advantageously way an arc offset of a quarter to a half radians should 2 to the staff. The material of the stirring rods should preferably consist of standing in the direction of rotation flat material, so the broadside be aligned in the direction of rotation. If not used in pairs of stirring rods of a stirrer at high speed may be provided by mass balance for balanced run.

Der Vorteil der technischen Lösung besteht darin, dass die projizierte Fläche der Rührstäbe bezogen auf die Drehrichtung vergrößert wird. Weiterhin wird der jeweils folgende Rührstab nicht in die Verwirbelung des vorlaufenden Rührstabes geführt, wodurch eine intensivere Durchmischung des Mischgutes erfolgt. Durch die Verwendung von z. B. Flachmaterial statt strömungstechnisch günstigen Materialien wie Rundstahl wird die Vermengung des Mischgutes erhöht.The advantage of the technical solution is that the projected area of the stirring bars is increased in relation to the direction of rotation. Furthermore, the respective subsequent stirring bar is not guided into the turbulence of the leading stirring bar, whereby a more thorough mixing of the mix takes place. By using z. B. flat material instead of aerodynamically favorable materials such as round steel, the mixing of the mix is increased.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Schaft des RührwerkesShaft of the agitator
22
Rührwerkagitator
33
Rührstäbe mit größtem Abstand zur DrehachseStirring rods with the greatest distance to the axis of rotation
44
Rührstäbe mit mindestens einem Materialdurchmesser geringerem Durchmesser zur DrehachseStirring rods with at least one diameter of material smaller diameter to the axis of rotation
55
Versatz der sinusförmig angeordneten Rührstäbe mit mindestens einem Materialdurchmesser in Längsrichtung oder einer viertel oder halben Bogenlänge verschobenOffset of the sinusoidally arranged stirring rods with at least one material diameter in the longitudinal direction or a quarter or half arc length shifted

Claims (1)

Veränderung der Anordnung von Rührwerkstäben bei Rührwerken und Mixern durch folgende Merkmale gekennzeichnet: 1. Die Rührstäbe werden so angeordnet, dass sie nicht untereinander im gleichen axialen Abstand zur Drehachse stehen. 2. Sinusförmig gewellte Rührstäbe werden so ausgeführt, dass die Sinuswelle mindestens um eine Materialstärke, aber Idealerweise um eine viertel bis halbe Bogenlänge in Längsrichtung im Verhältnis zu einander stehen. 3. Die Rührstäbe nicht aus strömungstechnisch günstigem Material hergestellt werden. 4. Bei Verwendung von Flach- oder anders geformten Material die Flachseite quer zur Drehrichtung angeordnet wird.Change in the arrangement of stirrer bars in agitators and mixers characterized by the following features: 1. The stirring rods are arranged so that they are not mutually at the same axial distance from the axis of rotation. 2. Sinusoidal corrugated stir bars are designed so that the sine wave is at least one material thickness, but ideally one quarter to one half arc length longitudinally relative to each other. 3. The stirrer bars are not made of aerodynamically favorable material. 4. When using flat or other shaped material, lay the flat side transverse to the direction of rotation.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115672075A (en) * 2022-12-28 2023-02-03 台昌树脂(佛山)有限公司 Preparation process of water-based resin
CN117085559A (en) * 2023-10-20 2023-11-21 天津民祥药业有限公司 Screening and mixing device for drug powder production and application method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175875A (en) * 1976-10-29 1979-11-27 Judd Van Horbek Hand mixing apparatus
DE102009060974A1 (en) * 2009-11-26 2011-06-01 Gerd Lukoschus Stirring device bar for increasing stirring bar length of stirring device and mixer, is formed by sinusoidally corrugated length independent of quantity of stirring device bar of stirring device and mixer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175875A (en) * 1976-10-29 1979-11-27 Judd Van Horbek Hand mixing apparatus
DE102009060974A1 (en) * 2009-11-26 2011-06-01 Gerd Lukoschus Stirring device bar for increasing stirring bar length of stirring device and mixer, is formed by sinusoidally corrugated length independent of quantity of stirring device bar of stirring device and mixer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115672075A (en) * 2022-12-28 2023-02-03 台昌树脂(佛山)有限公司 Preparation process of water-based resin
CN117085559A (en) * 2023-10-20 2023-11-21 天津民祥药业有限公司 Screening and mixing device for drug powder production and application method

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