EP1470856B1 - Stirrer for mixing, homogenising and dispersing - Google Patents

Stirrer for mixing, homogenising and dispersing Download PDF

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Publication number
EP1470856B1
EP1470856B1 EP04002872A EP04002872A EP1470856B1 EP 1470856 B1 EP1470856 B1 EP 1470856B1 EP 04002872 A EP04002872 A EP 04002872A EP 04002872 A EP04002872 A EP 04002872A EP 1470856 B1 EP1470856 B1 EP 1470856B1
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EP
European Patent Office
Prior art keywords
stirrer
bearing
head
recited
journal
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 - Lifetime
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EP04002872A
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German (de)
French (fr)
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EP1470856A1 (en
Inventor
Hermann Dr. Schindler
Andreas Burth
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Mavag Verfahrenstechnik AG
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Mavag Verfahrenstechnik AG
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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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
    • 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
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
    • B01F33/4534—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements using a rod for supporting the stirring element, e.g. stirrer sliding on a rod or mounted on a rod sliding in a tube
    • 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
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/411—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft
    • B01F35/4112—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft at the bottom of the receptacle, e.g. by studs

Definitions

  • the invention relates to a stirrer for substance combining of fluid phases, consisting of a rotatably mounted by means of a bearing stirrer head with stirring, and a clutch for non-contact, inductive or magnetic, drive the stirrer head and a, for example, in a container, fixed containment shell for receiving the drive-side coupling part, wherein means for securing the stirrer head are provided before axial lifting.
  • stirrer is known from US Pat. No. 4,993,841.
  • the drive motor is reversed in polarity, the magnetic force prevailing between the stirrer and the drive housing can be overcome and the stirrer can lift off through the axial component of the flow forces.
  • Such an event endangers the entire batch in the container.
  • DE 201 14 076 U shows a homogenizer which, in contrast to US Pat. No. 4,993,841, also has means for securing the stirrer head to axial lifting.
  • this construction however, disadvantageous new cavities and contact surfaces, between which microorganisms can settle.
  • stirrer for stirring sterile liquids known.
  • the stirrer head described is mounted floating on a pin attached to the containment shell.
  • This has the disadvantage that only stirring tools can be provided on the stirrer head, which either cause a radial outflow of the liquid to be stirred or effect an axial flow component of the liquid upwards, so that the stirrer head is pressed by a hydraulic axial force towards the split pot. If the stirrer were operated in axial flow tools opposite to the prescribed direction of rotation, the stirrer head would lift off the containment shell. This however, impacting the stirrer on the container wall could result in damage and failure of the agitator.
  • stirrers with stirrers for generating an axial flow only one direction of rotation can be realized.
  • the range of use of stirrers with stirring tool for generating an axial flow is limited. It can only be generated a flow profile, which is directed away from the container bottom, so that the stirrer head is pressed in the direction of the split pot.
  • the invention is therefore based on the object to propose a stirrer, which is particularly suitable for use in the pharmaceutical industry and the food industry.
  • stirrer head is secured by the Spalttopfunterseite ago from axial lifting, as a means for securing the stirrer head, a screw is provided, which is screwed from the Spalttopfunterseite ago, for example, provided in a pin internal thread.
  • the stirrer head is fixed almost axially.
  • the means for securing the stirrer head take on the axially upward, acting on the stirrer head axial force.
  • the backup of the stirrer head before axial lifting can be designed so that the stirrer head is axially displaceable in a certain range. This certain clearance may be necessary to allow adequate lubrication of the bearing and compensation for thermal expansion.
  • the inventive design of the stirrer it is possible to operate even a stirrer head with stirring tool for generating an axial flow in both directions of rotation. This considerably expands the process engineering field of application. Furthermore, it is possible to use the stirrer according to the invention even with increased safety requirements, for example when working in potentially explosive atmospheres.
  • the fuse is outside the product space, ie without product contact, the probability of contamination or contamination of the product is significantly reduced.
  • Another great advantage of the embodiment of the invention is that the fuse can be controlled from the outside.
  • the stirrer head, the bearing, the containment shell and the means for securing the stirrer head are designed as a structural unit. This makes it possible to introduce the preassembled unit in the container and to fix the outer side of the split pot from the outside and secure. This procedure is particularly advantageous since the bearing made mostly of ceramic can be damaged in the conventional assembly, in which the stirrer head with bearing bush is placed on a bearing sleeve attached to the containment shell. Since the stirrer head in the stirrer according to the invention is part of a structural unit, it no longer has to be individually applied in the container. Thus, the bearings are considerably spared during installation.
  • the bearing is arranged above the gap pot and in particular is formed as a combination of axial and radial bearings. Since the stirrer head can be operated in both directions, it is necessary that the axial forces of the stirrer can be absorbed in both directions and directed into the containment shell.
  • a pin is arranged with a head, wherein the pin bearing, preferably centrally, penetrates and is fixed directly or indirectly on the split pot and the pin head absorb the axial forces of the stirrer head can.
  • the pin head is virtually the counterpart to the front side of the gap pot.
  • the end face of the split pot takes the axial forces in Spalttopfraum and the pin head absorbs the axial forces in the opposite direction. Which force component is acting depends on the design of the stirring tool and the direction of rotation of the stirrer head. If the pin penetrates the entire camp, it is possible to fix the pin from the gap pot underside on the split pot and secure.
  • the pin does not penetrate the entire camp, but only screwed into a bearing core or anchored in any other way.
  • an upper contact surface for the stirrer head is formed for receiving the upward axial force component, wherein this contact surface, in an advantageous embodiment - the pin head, directly or indirectly attached to the containment shell or a stationary component.
  • the bearing as a product-lubricated sliding bearing with a mounted in the stirrer head, preferably shrunken bearing bush and a bearing sleeve therein, wherein the pin, the bearing sleeve, preferably centrally penetrates and the lower annular surface of the pin head, the upper end surface of the bearing bush at least partly covered.
  • the overlap is necessary so that the lower annular surface of the pin head can absorb the axial forces of the bearing bush connected to the stirrer head.
  • the pin head thus forms a contact surface for the bearing bush.
  • the lower annular surface of the pin head is arranged at a distance from the bearing bush. As a result, a certain mobility of the stirrer head is achieved in the axial direction.
  • the pin can serve as the sole hub of the bearing, which is concentrically enclosed by the bearing sleeve. This has the great advantage that the fixation of the pin can take place from the lower side of the split pot.
  • the bearing sleeve does not directly surround the pin, but that an additional, connected to the gap pot, metal sleeve is provided. In this case, the pin does not force the metal sleeve penetrate completely, but can be anchored directly in the metal sleeve.
  • the actual bearing sleeve is then arranged concentrically to the metal sleeve. Since the bearing is located in the product space and lubricated with product, the resulting minimum frictional heat is dissipated through the product. For a sufficient lubricating film between the bearing sleeve and bearing bush is provided by the flow profile and the oscillating movement in the concentric cavity between the stirrer head and split pot.
  • the bearing sleeve is formed below the pin head with a collar and forms a contact surface for the upper end side of the bearing bush.
  • the contact surface provides for the absorption of the axial forces of the stirrer.
  • the formed with a collar bearing sleeve is at the outer edge of sealed lower ring surface of the pin head relative to this by means of an O-ring. This avoids the product being able to penetrate into the space between the bearing sleeve and the pin.
  • an anti-twist device is provided in the pin.
  • the pin is rotatably connected at its lower end with the containment shell.
  • an axial lock can be attached.
  • the bearing bush has at least one connection opening, and the means for supplying liquid are provided through this connection opening.
  • the means for supplying liquid are provided through this connection opening.
  • a further advantageous possibility for introducing liquids into the intermediate space between the bearing sleeve and bearing bush is that the bearing bush is divided into two, or that at least two bearing bushes arranged one above the other in the axial direction are provided, and that means for feeding fluids, in particular lubricating but Also cleaning fluids are provided in the space between the sockets.
  • the containment shell is designed as a Einsteckflansch and inserted from the interior of the tank through a mounting flange and then fixed and secured to the gap pot face from the outside.
  • stator in addition to the stirrer with stirring a concentric, preferably designed as a guide tube, stator is provided.
  • a rotor-stator system as Leitstrahlmischer or Disperspergrlochtechnikmaschine. While the mixing of liquid components with not very different viscosities is still very simple, but the demand for the mixing element increases with increasing density and viscosity difference. While in a typical axial or radial advancing stirrer, low dissipation ratios, i. In the case of a rotor-stator system, a local high energy input to achieve certain mixing and dispersing effects is possible.
  • a concentric shearing ring is provided which is arranged to rotate with the agitator and that concentric to this shearing a further Scherkranz am Stator is provided.
  • the stator is designed as a combination between the guide tube and Scherkranz or as the sole Scherkranz.
  • the shear gradient increases with decreasing distance between the two shear rings.
  • the pin is formed by the containment shell, or is integrally connected thereto, wherein the pin has a vertical through hole and above the pin, a fastening washer is provided with internal thread, wherein the mounting disc is arranged so that it receives the axial forces of the stirrer and through the through hole from the split pot bottom forth a screw is guided, which is screwed into the internal thread of the mounting plate and thus the Stirrer head fixed to the containment shell to prevent axial lifting.
  • a fastening washer is provided with internal thread
  • the mounting disc is arranged so that it receives the axial forces of the stirrer and through the through hole from the split pot bottom forth a screw is guided, which is screwed into the internal thread of the mounting plate and thus the Stirrer head fixed to the containment shell to prevent axial lifting.
  • a locking pin is advantageously provided between pin and mounting plate.
  • the locking pin advantageously does not come into contact with the product.
  • FIG. 1 shows a stirrer 1 according to the invention for stirring sterilizable liquids.
  • the stirrer 1 consists of a stirrer head 2, which is rotatably mounted by means of a bearing 3.
  • a stirring tool 4 is provided at the stirrer 1, .
  • a clutch 5 is provided for non-contact drive of the stirrer head 2.
  • it is a magnetic coupling 5 with a drive-side coupling part 6, which is designed as a drive magnet and a concentric arranged secondary coupling part. 7
  • the drive magnet 6 is connected to a drive shaft in connection, which in turn is connected to the drive, in particular an electric motor.
  • the drive-side coupling part 6 is arranged within a split pot 8.
  • the containment shell 8 is designed as a plug-in flange.
  • the Einsteckflansch was introduced from the container interior in a mounting flange 9 and fixed at its lower end by means of a locking ring 10.
  • the mounting flange 9 is welded in the container 11.
  • the Einsteckflansch is circumferentially sealed relative to the mounting flange by means of an O-ring 12.
  • the containment shell is designed as a weld-in flange. This is welded directly to the container. On the O-ring 12 and the locking ring 10 can be dispensed with advantage.
  • the bearing 3 is designed as a product-lubricated ceramic or high-performance plastic plain bearing. However, it is also conceivable to use, for example, a ceramic ball bearing or roller bearings.
  • the bearing consists of a shrunk in the stirrer head 2 ceramic bushing 13 and a running therein bearing sleeve 14, also made of ceramic.
  • a pin 15 is guided with a head 16.
  • the pin 15 has the hub of the bearing 3.
  • the pin 15 has at its lower end to prevent rotation and is fixed in the containment shell 8, from below by means of a screw.
  • the lower annular surface 18 of the pin head 16 projects beyond the upper end face 19 of the bearing bush 13.
  • the bearing sleeve 14 is formed with a collar which serves as a contact surface for the upper end face 19 of the bearing bush 13.
  • the bearing sleeve 14 in turn is supported on the lower annular surface 18 of the pin head 16 and sealed with respect to this by means of an O-ring 20.
  • a thrust washer 21 Opposite the end face is a thrust washer 21 for receiving the oppositely acting axial forces of the stirrer head 2.
  • Bearing sleeve, bearing bush and thrust washer are made of ceramic.
  • the bearing 3, the stirrer head 2, and the pin 15 are formed as a unit, this unit can be guided from the container interior by means of the Einsteckflansches 8 through the mounting flange 9 and fixed by means of the securing ring 10. This eliminates damage to the bearings 3 during assembly.
  • a cavity 22 is provided, which is designed to be open at the bottom. Furthermore, 22 leading openings 23 are provided in the cavity.
  • FIG. 2 also shows an agitator 1 according to the invention with a bearing 3, agitator 4 and a clutch for non-contact drive of the agitator head 2.
  • a stator 24 is provided, which is formed in its upper region as a guide tube.
  • an axially aligned shearing collar 25 is provided concentrically with the axis of rotation of the stirrer head 2 at the outer ends of the stirrer 4.
  • the stator is also formed in the opposite region as a shearing ring 26.
  • the agitator fulfills the role of a disperser.
  • the dispersing effect is significantly improved.
  • FIG. 3 likewise shows a stirrer 1 with stirrer head 2 and bearing 3.
  • the bearing 3 contains two bearing bushes (13, 13 ') arranged one above the other in the axial direction.
  • There is a line 27 is provided, by means of a pump, not shown, liquids, in particular of lubricating and rinsing liquids, in the space between the bushes (13, 13 ') and thus also in the bearing gap can be introduced.
  • the feed is to be adapted constructively depending on the size of the stirrer.
  • the wiring can be made from above, through the container, or from below, for example through the flange.
  • FIG. 4 shows a large stirrer 1, wherein the pin 15 has a larger diameter than the pins of the stirrer in FIGS. 1 to 3.
  • the pin 15 is formed by the split pot 8 in this exemplary embodiment.
  • In the pin 15 is a central, vertical through hole 28 is provided.
  • Above the pin a resting on this mounting plate 29 is provided with internal thread 30.
  • the mounting plate 29 projects beyond the upper end face of the bearing bush 13, whereby it can receive an axial force component of the stirrer head.
  • Through the through hole 28 is from the split pot bottom her a screw 31 out, which is screwed into the internal thread 30 of the mounting plate 29 and thus the stirrer head 2 fixed to the split pot 8 and thus secures against axial lifting. Also in this embodiment, therefore, the backup takes place against axial lifting of the split pot bottom side.
  • a locking pin 32 is provided between pin 15 and mounting plate.
  • the locking pin 32 is advantageously not in contact with product.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Paints Or Removers (AREA)

Abstract

A stirrer for use in the purification of liquids comprises a rotating stirrer head (2) carrying paddles (4). This is mounted in a bearing (3) and has a coupling (5) for contactless-, inductive- or magnetic drive of the head. The drive side coupling components (6) are mounted in a split case (8) A bolt (15) passing centrally through the bearing and fastens it to the split case to prevent a gap forming due to it moving upwards. An independent claim is included for mounting a stirrer as described above on a tank.

Description

Die Erfindung betrifft einen Rührer zum Stoffvereinigen von fluiden Phasen, bestehend aus einem, mittels eines Lagers drehbar gelagerten Rührerkopf mit Rührwerkzeug, sowie mit einer Kupplung zum berührungslosen, induktiven oder magnetischen, Antrieb des Rührerkopfes und einem, beispielsweise in einem Behälter, fixierten Spalttopf zur Aufnahme des antriebsseitigen Kupplungsteils, wobei Mittel zur Sicherung des Rührerkopfes vor axialem Abheben vorgesehen sind.The invention relates to a stirrer for substance combining of fluid phases, consisting of a rotatably mounted by means of a bearing stirrer head with stirring, and a clutch for non-contact, inductive or magnetic, drive the stirrer head and a, for example, in a container, fixed containment shell for receiving the drive-side coupling part, wherein means for securing the stirrer head are provided before axial lifting.

Ein solcher Rührer ist aus der US-A-4 993 841 bekannt. Bei einer Verpolung des Antriebsmotors kann die zwischen dem Rührer und Antriebshülle herrschende magnetische Kraft überwunden werden und der Rührer kann durch die axiale Komponente der Strömungskräfte abheben. Solch ein Ereignis gefährdet die gesamte im Behälter befindliche Charge.Such a stirrer is known from US Pat. No. 4,993,841. When the drive motor is reversed in polarity, the magnetic force prevailing between the stirrer and the drive housing can be overcome and the stirrer can lift off through the axial component of the flow forces. Such an event endangers the entire batch in the container.

Zur Vermeidung solcher Betriebsstörungen zeigt die DE 201 14 076 U einen Homogenisator, der im Unterschied zur US-A- 4 993 841 auch Mittel zur Sicherung des Rührerkopfes vor axialem Abheben aufweist. Bei dieser Konstruktion entstehen jedoch nachteilig neue Hohlräume und Kontaktflächen, zwischen denen sich Mikroorganismen ansiedeln können.In order to avoid such malfunctions, DE 201 14 076 U shows a homogenizer which, in contrast to US Pat. No. 4,993,841, also has means for securing the stirrer head to axial lifting. In this construction, however, disadvantageous new cavities and contact surfaces, between which microorganisms can settle.

Weitere Rührer sind aus den Schriften GB-A-2 185 862, US-A-5 393 142 und US-A-6 065 865 bekannt.Other stirrers are known from the specifications GB-A-2 185 862, US-A-5 393 142 and US-A-6 065 865.

Schließlich ist aus der DE 42 32 936 C2 ein Rührer zum Rühren von sterilen Flüssigkeiten bekannt. Der beschriebene Rührerkopf ist an einem, am Spalttopf befestigten Zapfen schwimmend gelagert. Dies hat den Nachteil, dass nur Rührwerkzeuge am Rührerkopf vorgesehen werden können, die entweder eine radiale Abströmung der zu rührenden Flüssigkeit bewirken oder die eine axiale Strömungskomponente der Flüssigkeit nach oben bewirken, so dass der Rührerkopf durch eine hydraulische Axialkraft in Richtung Spalttopf gedrückt wird. Würde der Rührer bei axialen Strömungswerkzeugen entgegengesetzt der vorgeschriebenen Drehrichtung betrieben, so würde der Rührerkopf vom Spalttopf abheben. Dies jedoch könnte beim Aufschlagen des Rührers auf die Behälterwand zur Beschädigung und zum Ausfall des Rührwerks führen.Finally, from DE 42 32 936 C2, a stirrer for stirring sterile liquids known. The stirrer head described is mounted floating on a pin attached to the containment shell. This has the disadvantage that only stirring tools can be provided on the stirrer head, which either cause a radial outflow of the liquid to be stirred or effect an axial flow component of the liquid upwards, so that the stirrer head is pressed by a hydraulic axial force towards the split pot. If the stirrer were operated in axial flow tools opposite to the prescribed direction of rotation, the stirrer head would lift off the containment shell. This however, impacting the stirrer on the container wall could result in damage and failure of the agitator.

Weiterhin ist nachteilig, dass bei bekannten Rührern mit Rührwerkzeugen zur Erzeugung einer axialen Strömung immer nur eine Drehrichtung realisiert werden kann. Hierdurch wird der Einsatzbereich von Rührern mit Rührwerkzeug zur Erzeugung einer axialen Strömung beschränkt. Es kann nur ein Strömungsprofil erzeugt werden, welches vom Behälterboden weg gerichtet ist, so dass der Rührerkopf in Richtung Spalttopf gedrückt wird.Another disadvantage is that in known stirrers with stirrers for generating an axial flow only one direction of rotation can be realized. As a result, the range of use of stirrers with stirring tool for generating an axial flow is limited. It can only be generated a flow profile, which is directed away from the container bottom, so that the stirrer head is pressed in the direction of the split pot.

Der aus der DE 42 32 935 C2 bekannte Rührer ist dagegen vor axialem Abheben mittels einer Schraube gesichert. Nachteilig bei dem bekannten Rührer ist, dass die Sicherung im Produktraum vorgesehen ist. Hierdurch ist eine Infektionsquelle gegeben, was insbesondere im pharamzeutischen oder lebensmitteltechnischen Einsatzgebiet zu erheblichen Problemen führen kann.The known from DE 42 32 935 C2 stirrer, however, is secured against axial lifting by means of a screw. A disadvantage of the known stirrer is that the fuse is provided in the product space. This is a source of infection which can lead to considerable problems, in particular in the pharmaceutical or food-technical field of application.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Rührer vorzuschlagen, der insbesondere für den Einsatz in der Pharmaindustrie und der Lebensmittelindustrie geeignet ist.The invention is therefore based on the object to propose a stirrer, which is particularly suitable for use in the pharmaceutical industry and the food industry.

Diese Aufgabe wird dadurch gelöst, dass der Rührerkopf von der Spalttopfunterseite her vor axialem Abheben gesichert ist, wobei als Mittel zur Sicherung des Rührerkopfes eine Schraube vorgesehen ist, die von der Spalttopfunterseite her beispielsweise in ein im Zapfen vorgesehenes Innengewinde verschraubt ist. Der Rührerkopf wird quasi axial fixiert. Die Mittel zur Sicherung des Rührerkopfes nehmen die axial nach oben, auf den Rührerkopf wirkende Axialkraft auf. Selbstverständlich kann die Sicherung des Rührerkopfes vor axialem Abheben so ausgebildet sein, dass der Rührerkopf in einem gewissen Bereich axial verschiebbar ist. Dieses gewisse Spiel kann notwendig sein, um eine ausreichende Schmierung des Lagers und den Ausgleich von Wärmeausdehnungen zu ermöglichen.This object is achieved in that the stirrer head is secured by the Spalttopfunterseite ago from axial lifting, as a means for securing the stirrer head, a screw is provided, which is screwed from the Spalttopfunterseite ago, for example, provided in a pin internal thread. The stirrer head is fixed almost axially. The means for securing the stirrer head take on the axially upward, acting on the stirrer head axial force. Of course, the backup of the stirrer head before axial lifting can be designed so that the stirrer head is axially displaceable in a certain range. This certain clearance may be necessary to allow adequate lubrication of the bearing and compensation for thermal expansion.

Durch die erfindungsgemäße Ausgestaltung des Rührers ist es möglich, selbst einen Rührerkopf mit Rührwerkzeug zur Erzeugung einer axialen Strömung in beide Drehrichtungen zu betreiben. Dies erweitert das verfahrenstechnische Einsatzgebiet erheblich. Weiterhin ist es möglich, den erfindungsgemäßen Rührer selbst bei erhöhten Sicherheitsanforderungen, beispielsweise beim Arbeiten in explosionsgefährdeten Bereichen einzusetzen.The inventive design of the stirrer, it is possible to operate even a stirrer head with stirring tool for generating an axial flow in both directions of rotation. This considerably expands the process engineering field of application. Furthermore, it is possible to use the stirrer according to the invention even with increased safety requirements, for example when working in potentially explosive atmospheres.

Dadurch, dass die Sicherung außerhalb des Produktraumes, also ohne Produktberührung erfolgt, wird die Wahrscheinlichkeit einer Kontamination oder Verunreinigung des Produktes erheblich reduziert. Ein weiterer großer Vorteil der erfindungsgemäßen Ausgestaltung besteht darin, dass die Sicherung von Außen kontrolliert werden kann.The fact that the fuse is outside the product space, ie without product contact, the probability of contamination or contamination of the product is significantly reduced. Another great advantage of the embodiment of the invention is that the fuse can be controlled from the outside.

Gemäß einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass der Rührerkopf, das Lager, der Spalttopf sowie die Mittel zur Sicherung des Rührerkopfes als Baueinheit ausgebildet sind. Hierdurch ist es möglich, die vormontierte Baueinheit in den Behälter einzubringen und an der Spalttopfstirnseite von außen zu fixieren und zu sichern. Diese Vorgehensweise ist besonders vorteilhaft, da die meist aus Keramik gefertigten Lager bei der herkömmlichen Montage, bei der der Rührerkopf mit Lagerbuchse auf eine am Spalttopf angebrachte Lagerhülse aufgesetzt wird, Schaden nehmen können. Da der Rührerkopf beim erfindungsgemäßen Rührer Teil einer Baueinheit ist, muss dieser nicht mehr einzeln im Behälter aufgebracht werden. Somit werden die Lager bei der Montage erheblich geschont.According to an advantageous embodiment of the invention it is provided that the stirrer head, the bearing, the containment shell and the means for securing the stirrer head are designed as a structural unit. This makes it possible to introduce the preassembled unit in the container and to fix the outer side of the split pot from the outside and secure. This procedure is particularly advantageous since the bearing made mostly of ceramic can be damaged in the conventional assembly, in which the stirrer head with bearing bush is placed on a bearing sleeve attached to the containment shell. Since the stirrer head in the stirrer according to the invention is part of a structural unit, it no longer has to be individually applied in the container. Thus, the bearings are considerably spared during installation.

Es ist besonders zweckmäßig, wenn das Lager oberhalb des Spalttopfes angeordnet ist und insbesondere als Kombination aus Axial- und Radiallager ausgebildet ist. Da der Rührerkopf in beide Richtungen betrieben werden kann, ist es notwendig, dass die Axialkräfte des Rührers in beide Richtungen aufgenommen und in den Spalttopf geleitet werden können.It is particularly useful if the bearing is arranged above the gap pot and in particular is formed as a combination of axial and radial bearings. Since the stirrer head can be operated in both directions, it is necessary that the axial forces of the stirrer can be absorbed in both directions and directed into the containment shell.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass als Mittel zur Sicherung des Rührerkopfes ein Zapfen mit einem Kopf angeordnet wird, wobei der Zapfen das Lager, vorzugsweise zentrisch, durchdringt und mittelbar oder unmittelbar am Spalttopf fixiert ist und der Zapfenkopf die Axialkräfte des Rührerkopfes aufnehmen kann. Der Zapfenkopf bildet quasi das Gegenstück zur Stirnseite des Spalttopfes. Die Stirnseite des Spalttopfes nimmt die Axialkräfte in Spalttopfrichtung und der Zapfenkopf nimmt die Axialkräfte in entgegengesetzter Richtung auf. Welche Kraftkomponente gerade wirkt, hängt von der Ausbildung des Rührwerkzeugs und der Drehrichtung des Rührerkopfes ab. Wenn der Zapfen das gesamte Lager durchdringt, ist es möglich, den Zapfen von der Spalttopfunterseite her am Spalttopf zu fixieren und zu sichern. Es ist jedoch auch denkbar, dass der Zapfen nicht das gesamte Lager durchdringt, sondern lediglich in einen Lagerkern verschraubt oder auf jede beliebige andere Art verankert wird. Es ist jedoch unverzichtbar, dass direkt oder indirekt eine obere Anlauffläche für den Rührerkopf, zur Aufnahme der nach oben gerichteten Axialkraftkomponente, gebildet wird, wobei diese Anlauffläche, in einer vorteilhaften Ausgestaltung - der Zapfenkopf, mittelbar oder unmittelbar am Spalttopf oder einem stationären Bauteil befestigt ist.According to an advantageous embodiment of the invention it is provided that as a means for securing the stirrer head, a pin is arranged with a head, wherein the pin bearing, preferably centrally, penetrates and is fixed directly or indirectly on the split pot and the pin head absorb the axial forces of the stirrer head can. The pin head is virtually the counterpart to the front side of the gap pot. The end face of the split pot takes the axial forces in Spalttopfrichtung and the pin head absorbs the axial forces in the opposite direction. Which force component is acting depends on the design of the stirring tool and the direction of rotation of the stirrer head. If the pin penetrates the entire camp, it is possible to fix the pin from the gap pot underside on the split pot and secure. However, it is also conceivable that the pin does not penetrate the entire camp, but only screwed into a bearing core or anchored in any other way. However, it is indispensable that directly or indirectly an upper contact surface for the stirrer head, is formed for receiving the upward axial force component, wherein this contact surface, in an advantageous embodiment - the pin head, directly or indirectly attached to the containment shell or a stationary component.

Es ist von besonderem Vorteil, dass das Lager als produktgeschmiertes Gleitlager mit einer im Rührerkopf angebrachten, vorzugsweise eingeschrumpften Lagerbuchse und einer darin laufenden Lagerhülse besteht, wobei der Zapfen die Lagerhülse, vorzugsweise zentrisch, durchdringt und die untere Ringfläche des Zapfenkopfes die obere Stirnfläche der Lagerbuchse zumindest zum Teil überdeckt. Die Überdeckung ist notwendig, damit die untere Ringfläche des Zapfenkopfes die Axialkräfte der mit dem Rührerkopf verbundenen Lagerbuchse aufnehmen kann. Der Zapfenkopf bildet also eine Anlauffläche für die Lagerbuchse. Es ist denkbar, dass die untere Ringfläche des Zapfenkopfes von der Lagerbuchse beabstandet angeordnet ist. Hierdurch wird eine gewisse Beweglichkeit des Rührerkopfes in axialer Richtung erreicht. Der Zapfen kann dabei als alleinige Nabe des Lagers dienen, die von der Lagerhülse konzentrisch umschlossen ist. Dies hat den großen Vorteil, dass die Fixierung des Zapfens von der Spalttopfunterseite her erfolgen kann. Es ist jedoch auch möglich, dass die Lagerhülse nicht unmittelbar den Zapfen umschließt, sondern dass eine zusätzliche, mit dem Spalttopf verbundene, Metallhülse vorgesehen ist. In diesem Fall muss der Zapfen die Metallhülse nicht zwangsweise ganz durchdringen, sondern kann unmittelbar in der Metallhülse verankert sein. Die eigentliche Lagerhülse ist dann konzentrisch zu der Metallhülse angeordnet. Da das Lager im Produktraum liegt und produktgeschmiert ist, wird die entstehende minimale Reibungswärme über das Produkt abgeführt. Für einen ausreichenden Schmierfilm zwischen Lagerhülse und Lagerbuchse wird durch das Strömungsprofil und die oszillierende Bewegung im konzentrischen Hohlraum zwischen Rührerkopf und Spalttopf gesorgt.It is of particular advantage that the bearing as a product-lubricated sliding bearing with a mounted in the stirrer head, preferably shrunken bearing bush and a bearing sleeve therein, wherein the pin, the bearing sleeve, preferably centrally penetrates and the lower annular surface of the pin head, the upper end surface of the bearing bush at least partly covered. The overlap is necessary so that the lower annular surface of the pin head can absorb the axial forces of the bearing bush connected to the stirrer head. The pin head thus forms a contact surface for the bearing bush. It is conceivable that the lower annular surface of the pin head is arranged at a distance from the bearing bush. As a result, a certain mobility of the stirrer head is achieved in the axial direction. The pin can serve as the sole hub of the bearing, which is concentrically enclosed by the bearing sleeve. This has the great advantage that the fixation of the pin can take place from the lower side of the split pot. However, it is also possible that the bearing sleeve does not directly surround the pin, but that an additional, connected to the gap pot, metal sleeve is provided. In this case, the pin does not force the metal sleeve penetrate completely, but can be anchored directly in the metal sleeve. The actual bearing sleeve is then arranged concentrically to the metal sleeve. Since the bearing is located in the product space and lubricated with product, the resulting minimum frictional heat is dissipated through the product. For a sufficient lubricating film between the bearing sleeve and bearing bush is provided by the flow profile and the oscillating movement in the concentric cavity between the stirrer head and split pot.

Es ist von besonderem Vorteil, wenn die Lagerhülse unterhalb des Zapfenkopfes mit einem Bund ausgebildet ist und eine Anlauffläche für die obere Stirnseite der Lagerbuchse bildet. Die Anlauffläche sorgt für die Aufnahme der Axialkräfte des Rührers. Die mit einem Bund ausgebildete Lagerhülse ist an der Außenkante der unteren Ringfläche des Zapfenkopfes gegenüber diesem mittels eines O-Rings abgedichtet. So wird vermieden, das Produkt in den Zwischenraum zwischen Lagerhülse und Zapfen eindringen kann.It is of particular advantage if the bearing sleeve is formed below the pin head with a collar and forms a contact surface for the upper end side of the bearing bush. The contact surface provides for the absorption of the axial forces of the stirrer. The formed with a collar bearing sleeve is at the outer edge of sealed lower ring surface of the pin head relative to this by means of an O-ring. This avoids the product being able to penetrate into the space between the bearing sleeve and the pin.

Damit die in Richtung Spalttopf gerichteten Axialkräfte des Rührerkopfes aufgenommen werden können, ist unterhalb der Lagerbuchse eine Anlauffläche für die untere Stirnseite der Lagerbuchse vorgesehen.Thus, the axial direction of the stirrer head directed in the direction of the can, a contact surface for the lower end side of the bearing bush is provided below the bearing bush.

Besonders verschleißfreie Lager erhält man, wenn das Lager und/oder die Anlaufflächen aus Keramik gefertigt sind.Particularly wear-free bearings are obtained when the bearing and / or the contact surfaces are made of ceramic.

Um ein Verdrehen oder gar ein Lösen des Zapfens zu verhindern, ist im Zapfen eine Verdrehsicherung vorgesehen. Beispielsweise ist der Zapfen an seinen unteren Ende mit dem Spalttopf drehfest verbunden. Zusätzlich kann eine axiale Sicherung angebracht werden.To prevent twisting or even loosening of the pin, an anti-twist device is provided in the pin. For example, the pin is rotatably connected at its lower end with the containment shell. In addition, an axial lock can be attached.

Es ist besonders zweckmäßig, wenn die Lagerbuchse zumindest eine Verbindungsöffnung aufweist, und das Mittel zur Speisung von Flüssigkeit durch diese Verbindungsöffnung vorgesehen sind. So ist es möglich, dass vom Inneren des Spalttopfes her eine Leitung durch den Zapfen bis zur Verbindungsöffnung geführt ist. Durch diese kann eine Flüssigkeit in den Zwischenraum zwischen Lagerhülse und Lagerbuchse eingebracht werden.It is particularly useful if the bearing bush has at least one connection opening, and the means for supplying liquid are provided through this connection opening. Thus, it is possible that from the interior of the gap pot forth a line is guided through the pin to the connection opening. Through this, a liquid can be introduced into the intermediate space between the bearing sleeve and the bearing bush.

Eine weitere vorteilhafte Möglichkeit zur Einbringung von Flüssigkeiten in den Zwischenraum zwischen Lagerhülse und Lagerbuchse besteht darin, dass die Lagerbuchse zweigeteilt ist, beziehungsweise dass mindestens zwei in axialer Richtung übereinander angeordnete Lagerbuchsen vorgesehen sind, und dass Mittel zur Speisung von Flüssigkeiten, insbesondere von Schmier- aber auch Reinigungsflüssigkeiten, in den Zwischenraum zwischen den Buchsen vorgesehen sind.A further advantageous possibility for introducing liquids into the intermediate space between the bearing sleeve and bearing bush is that the bearing bush is divided into two, or that at least two bearing bushes arranged one above the other in the axial direction are provided, and that means for feeding fluids, in particular lubricating but Also cleaning fluids are provided in the space between the sockets.

Beide Varianten ermöglichen, Flüssigkeiten vom Inneren des Spaltrohres her in den Lagerspalt einzubringen.Both variants make it possible to introduce liquids from the inside of the can into the bearing gap.

Auf zusätzliche Dichtungen kann verzichtet werden, wenn der Spalttopf als Einschweißflansch ausgebildet ist und direkt in die Behälterwand eingeschweißt wird.Additional seals can be dispensed with if the containment shell is designed as a weld-in flange and is welded directly into the container wall.

Der Einbau des Rührers wird wesentlich erleichtert, wenn der Spalttopf als Einsteckflansch ausgebildet ist und vom Inneren des Tanks durch einen Montageflansch hindurchgesteckt und sodann an der Spalttopfstirnseite von außen fixiert und gesichert wird.The installation of the stirrer is greatly facilitated if the containment shell is designed as a Einsteckflansch and inserted from the interior of the tank through a mounting flange and then fixed and secured to the gap pot face from the outside.

Gemäß einer Weiterbildung der Erfindung ist vorgesehen, dass zusätzlich zum Rührer mit Rührwerkzeug ein konzentrischer, vorzugsweise als Leitrohr ausgebildeter, Stator vorgesehen ist. Durch diese Maßnahme erhält man ein Rotor-Stator-System als Leitstrahlmischer oder Dispergierrührwerkzeug. Während das Vermischen von flüssigen Komponenten mit nicht sehr unterschiedlichen Viskositäten noch sehr einfach ist, so wächst doch der Anspruch an das Mischorgan mit steigender Dichte- und Viskositätsdifferenz an. Während bei einem typischen axial- oder radialfördernden Rührer geringe Dissipisationsverhältnisse, d.h. eine Ungleichverteilung des Energieeintrags im Prozessraum angestrebt werden, ist bei einem Rotor-Stator-System ein lokaler hoher Energieeintrag zum Erreichen bestimmter Misch- und Dispergiereffekte möglich.According to one embodiment of the invention it is provided that in addition to the stirrer with stirring a concentric, preferably designed as a guide tube, stator is provided. By this measure, one obtains a rotor-stator system as Leitstrahlmischer or Disperspergrührwerkzeug. While the mixing of liquid components with not very different viscosities is still very simple, but the demand for the mixing element increases with increasing density and viscosity difference. While in a typical axial or radial advancing stirrer, low dissipation ratios, i. In the case of a rotor-stator system, a local high energy input to achieve certain mixing and dispersing effects is possible.

Wenn gleichzeitig mit der verbesserten Durchmischung durch die Verwendung eines Stators, eine Dispergierwirkung erzielt werden soll, ist mit Vorteil vorgesehen, dass zusätzlich zum Rührwerk ein konzentrischer Scherkranz vorgesehen ist, der mit dem Rührwerk rotierend angeordnet ist und dass konzentrisch zu diesem Scherkranz ein weiterer Scherkranz am Stator vorgesehen ist. Dabei ist es möglich, dass der Stator als Kombination zwischen Leitrohr und Scherkranz oder als alleiniger Scherkranz ausgebildet ist. Der Schergradient steigt mit abnehmendem Abstand zwischen den beiden Scherkränzen. Der Einsatz dieser erfindungsgemäßen Weiterbildung eignet sich insbesondere bei schwermischbaren Flüssigkeitskomponenten.If simultaneously with the improved mixing by the use of a stator, a dispersing effect is to be achieved, it is advantageously provided that in addition to the agitator a concentric shearing ring is provided which is arranged to rotate with the agitator and that concentric to this shearing a further Scherkranz am Stator is provided. It is possible that the stator is designed as a combination between the guide tube and Scherkranz or as the sole Scherkranz. The shear gradient increases with decreasing distance between the two shear rings. The use of this development according to the invention is particularly suitable for difficult-to-mix liquid components.

Insbesondere bei großen Rührern mit einem Zapfen mit großem Durchmesser ist es von Vorteil, dass der Zapfen durch den Spalttopf gebildet ist, oder mit diesem einstückig verbunden ist, wobei der Zapfen eine senkrechte Durchgangsbohrung aufweist und oberhalb des Zapfens eine Befestigungsscheibe mit Innengewinde vorgesehen ist, wobei die Befestigungsscheibe so angeordnet ist, dass sie die Axialkräfte des Rührers aufnimmt und durch die Durchgangsbohrung von der Spalttopfunterseite her eine Schraube geführt wird, die in das Innengewinde der Befestigungsscheibe verschraubt ist und damit den Rührerkopf am Spalttopf fixiert und so axiales Abheben verhindert. Eine solche Ausführungsform ist bei Zapfen mit kleinen Durchmessern nicht möglich, da dann die Schraube einen zu geringen Querschnitt aufweisen würde. Die Ausgestaltung hat den Vorteil, dass auf den O-Ring unterhalb der unteren Anlaufscheibe, verzichtet werden kann.Especially with large stirrers with a pin with a large diameter, it is advantageous that the pin is formed by the containment shell, or is integrally connected thereto, wherein the pin has a vertical through hole and above the pin, a fastening washer is provided with internal thread, wherein the mounting disc is arranged so that it receives the axial forces of the stirrer and through the through hole from the split pot bottom forth a screw is guided, which is screwed into the internal thread of the mounting plate and thus the Stirrer head fixed to the containment shell to prevent axial lifting. Such an embodiment is not possible with small diameter cones because then the screw would have too small a cross section. The embodiment has the advantage that it can be dispensed with the O-ring below the lower thrust washer.

Um ein Verdrehen der Befestigungsscheibe zu verhindern, ist mit Vorteil zwischen Zapfen und Befestigungsscheibe ein Sicherungsstift vorgesehen. Der Sicherungsstift kommt mit Vorteil nicht mit Produkt in Berührung.To prevent twisting of the mounting plate, a locking pin is advantageously provided between pin and mounting plate. The locking pin advantageously does not come into contact with the product.

Drei Ausführungsbeispiele der Erfindung werden anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1:
einen erfindungsgemäßen Rührer,
Fig. 2:
einen erfindungsgemäßen Rührer mit einem Rotor-Stator-System
Fig. 3:
einen Rührer mit geteilter Lagerhülse
Fig. 4:
einen Rührer mit großen Zapfen.
Three embodiments of the invention will be explained in more detail with reference to the drawings. Show it:
Fig. 1:
a stirrer according to the invention,
Fig. 2:
a stirrer according to the invention with a rotor-stator system
3:
a stirrer with split bearing sleeve
4:
a stirrer with big cones.

In Figur 1 ist ein erfindungsgemäßer Rührer 1 zum Rühren von sterilisierbaren Flüssigkeiten dargestellt. Der Rührer 1 besteht aus einem Rührerkopf 2, welcher mittels eines Lagers 3 drehbar gelagert ist. Am Rührer 1 ist ein Rührwerkzeug 4 vorgesehen. In diesem Ausführungsbeispiel handelt es sich dabei um Rührwerkzeug 4 zur Erzeugung einer axialen Strömung.FIG. 1 shows a stirrer 1 according to the invention for stirring sterilizable liquids. The stirrer 1 consists of a stirrer head 2, which is rotatably mounted by means of a bearing 3. At the stirrer 1, a stirring tool 4 is provided. In this embodiment, these are stirring tools 4 for generating an axial flow.

Weiterhin ist eine Kupplung 5 zum berührungslosen Antrieb des Rührerkopfes 2 vorgesehen. In diesem Ausführungsbeispiel handelt es sich um eine Magnetkupplung 5 mit einem antriebsseitigen Kupplungsteil 6, welches als Antriebsmagnet ausgebildet ist und einem konzentrisch dazu angeordneten sekundären Kupplungsteil 7.Furthermore, a clutch 5 is provided for non-contact drive of the stirrer head 2. In this embodiment, it is a magnetic coupling 5 with a drive-side coupling part 6, which is designed as a drive magnet and a concentric arranged secondary coupling part. 7

Der Antriebsmagnet 6 steht mit einer Antriebswelle in Verbindung, die wiederum mit dem Antrieb, insbesondere einem Elektromotor verbunden ist.The drive magnet 6 is connected to a drive shaft in connection, which in turn is connected to the drive, in particular an electric motor.

Das antriebsseitige Kupplungsteil 6 ist innerhalb eines Spalttopfes 8 angeordnet. In der linken Zeichnungshälfte ist der Spalttopf 8 als Einsteckflansch ausgebildet. Der Einsteckflansch wurde vom Behälterinneren in einen Montageflansch 9 eingebracht und an seinem unteren Ende mittels eines Sicherungsrings 10 fixiert. Der Montageflansch 9 ist im Behälter 11 eingeschweißt. Der Einsteckflansch ist gegenüber dem Montageflansch umfangsseitig mittels eines O-Rings 12 abgedichtet.The drive-side coupling part 6 is arranged within a split pot 8. In the left half of the drawing, the containment shell 8 is designed as a plug-in flange. The Einsteckflansch was introduced from the container interior in a mounting flange 9 and fixed at its lower end by means of a locking ring 10. The mounting flange 9 is welded in the container 11. The Einsteckflansch is circumferentially sealed relative to the mounting flange by means of an O-ring 12.

In der rechten Zeichnungshälfte ist der Spalttopf als Einschweißflansch ausgebildet. Dieser wird direkt mit dem Behälter verschweißt. Auf den O-Ring 12 und den Sicherungsring 10 kann mit Vorteil verzichtet werden.In the right half of the drawing, the containment shell is designed as a weld-in flange. This is welded directly to the container. On the O-ring 12 and the locking ring 10 can be dispensed with advantage.

Selbstverständlich kann entweder nur die Einsteckflanschvariante oder die Einschweißflanschvariante gewählt werden.Of course, either only the Einsteckflanschvariante or Einschweißflanschvariante be selected.

Das Lager 3 ist als produktgeschmiertes Keramik- oder Hochleistungskunststoffgleitlager ausgebildet. Es ist jedoch auch denkbar, beispielsweise ein Keramikkugellager oder Wälzlager einzusetzen.The bearing 3 is designed as a product-lubricated ceramic or high-performance plastic plain bearing. However, it is also conceivable to use, for example, a ceramic ball bearing or roller bearings.

Das Lager besteht aus einer im Rührerkopf 2 eingeschrumpften Keramiklagerbuchse 13 und einer darin laufenden Lagerhülse 14, ebenfalls aus Keramik.The bearing consists of a shrunk in the stirrer head 2 ceramic bushing 13 and a running therein bearing sleeve 14, also made of ceramic.

Durch das Zentrum der Lagerhülse 14 ist ein Zapfen 15 mit einem Kopf 16 geführt. Der Zapfen 15 bildet die Nabe des Lagers 3. Der Zapfen 15 weist an seinem unteren Ende eine Verdrehsicherung auf und ist im Spalttopf 8, von unten her mittels einer Schraube fixiert. Die untere Ringfläche 18 des Zapfenkopfes 16 überragt die obere Stirnseite 19 der Lagerbuchse 13.Through the center of the bearing sleeve 14, a pin 15 is guided with a head 16. The pin 15 has the hub of the bearing 3. The pin 15 has at its lower end to prevent rotation and is fixed in the containment shell 8, from below by means of a screw. The lower annular surface 18 of the pin head 16 projects beyond the upper end face 19 of the bearing bush 13.

Die Lagerhülse 14 wird mit einem Bund ausgebildet, der als Anlauffläche für die obere Stirnseite 19 der Lagerbuchse 13 dient. Die Lagerhülse 14 wiederum ist an der unteren Ringfläche 18 des Zapfenkopfes 16 abgestützt und gegenüber dieser mittels eines O-Rings 20 abgedichtet. Der Stirnfläche gegenüberliegend ist eine Anlaufscheibe 21 zur Aufnahme der entgegengesetzt wirkenden axialen Kräfte des Rührerkopfes 2 vorgesehen. Lagerhülse, Lagerbuchse und Anlaufscheibe sind aus Keramik gefertigt.The bearing sleeve 14 is formed with a collar which serves as a contact surface for the upper end face 19 of the bearing bush 13. The bearing sleeve 14 in turn is supported on the lower annular surface 18 of the pin head 16 and sealed with respect to this by means of an O-ring 20. Opposite the end face is a thrust washer 21 for receiving the oppositely acting axial forces of the stirrer head 2. Bearing sleeve, bearing bush and thrust washer are made of ceramic.

Wenn der als Einsteckflansch ausgebildete Spalttopf 8, das Lager 3, der Rührerkopf 2, sowie der Zapfen 15 als Baueinheit ausgebildet sind, kann diese Baueinheit vom Behälterinneren her mittels des Einsteckflansches 8 durch den Montageflansch 9 geführt und mittels des Sicherungsrings 10 fixiert werden. Hierdurch scheidet eine Beschädigung der Lager 3 bei der Montage aus.If designed as a Einsteckflansch gap pot 8, the bearing 3, the stirrer head 2, and the pin 15 are formed as a unit, this unit can be guided from the container interior by means of the Einsteckflansches 8 through the mounting flange 9 and fixed by means of the securing ring 10. This eliminates damage to the bearings 3 during assembly.

Zwischen Rührerkopf 2 sowie dem Spalttopf 8 ist ein Hohlraum 22 vorgesehen, der nach unten hin offen ausgebildet ist. Weiterhin sind in den Hohlraum 22 führende Öffnungen 23 vorgesehen. Wenn der Rührerkopf 2 in Rotation versetzt wird, entsteht innerhalb des Hohlraums 22 ein Druckunterschied gegenüber dem übrigen Behälter, sodass der Hohlraum ständig von flüssigem Medium durchflossen wird. Gleichzeitig sorgt dieses Strömungsprofil für eine Schmierfilmbenetzung zur Schmierung des Gleitlagers 3.Between the stirrer head 2 and the split pot 8, a cavity 22 is provided, which is designed to be open at the bottom. Furthermore, 22 leading openings 23 are provided in the cavity. When the stirrer head 2 is set in rotation, a pressure difference arises in the cavity 22 relative to the rest of the container, so that the cavity is constantly traversed by liquid medium. At the same time, this airfoil provides lubricating film wetting for lubrication of the sliding bearing 3.

In Figur 2 ist ebenfalls ein erfindungsgemäßer Rührer 1 mit Lager 3, Rührwerk 4 und einer Kupplung zum berührungslosen Antrieb des Rührerkopfes 2 gezeigt. Konzentrisch zu dem Rührwerkzeug 4 ist ein Stator 24 vorgesehen, der in seinem oberen Bereich als Leitrohr ausgebildet ist.FIG. 2 also shows an agitator 1 according to the invention with a bearing 3, agitator 4 and a clutch for non-contact drive of the agitator head 2. Concentric with the stirring tool 4, a stator 24 is provided, which is formed in its upper region as a guide tube.

Um eine zusätzliche Dispergierwirkung zu erzielen, ist konzentrisch zur Drehachse des Rührerkopfes 2 an den äußeren Enden des Rührwerkzeugs 4 ein axial ausgerichteter Scherkranz 25 vorgesehen. Der Stator ist im gegenüberliegenden Bereich ebenfalls als Scherkranz 26 ausgebildet. Durch die Wahl des Abstands zwischen beiden Scherkränzen 25, 26 kann der Schergradient variiert werden.In order to achieve an additional dispersing effect, an axially aligned shearing collar 25 is provided concentrically with the axis of rotation of the stirrer head 2 at the outer ends of the stirrer 4. The stator is also formed in the opposite region as a shearing ring 26. By choosing the distance between the two Scherkränzen 25, 26, the shear gradient can be varied.

Durch das Vorsehen der Scherkränze mit Profilierung erfüllt das Rührwerk die Aufgabe eines Dispergators. Die Dispergierwirkung wird wesentlich verbessert.By providing the shear rings with profiling, the agitator fulfills the role of a disperser. The dispersing effect is significantly improved.

Figur 3 zeigt ebenfalls einen Rührer 1 mit Rührerkopf 2 und Lager 3. Das Lager 3 beinhaltet zwei in axialer Richtung übereinander angeordnete Lagerbuchsen (13, 13'). Es ist eine Leitung 27 vorgesehen, mit der mittels einer nicht dargestellten Pumpe Flüssigkeiten, insbesondere von Schmier- und Spülflüssigkeiten, in den Zwischenraum zwischen den Buchsen (13, 13') und damit auch in den Lagerspalt eingebracht werden können. Die Zuführung ist je nach Größe des Rührers konstruktiv anzupassen. Die Leitungsführung kann von obern her, durch den Behälter, oder von unten her, beispielsweise durch den Flansch, erfolgen.FIG. 3 likewise shows a stirrer 1 with stirrer head 2 and bearing 3. The bearing 3 contains two bearing bushes (13, 13 ') arranged one above the other in the axial direction. There is a line 27 is provided, by means of a pump, not shown, liquids, in particular of lubricating and rinsing liquids, in the space between the bushes (13, 13 ') and thus also in the bearing gap can be introduced. The feed is to be adapted constructively depending on the size of the stirrer. The wiring can be made from above, through the container, or from below, for example through the flange.

Hierdurch ist eine neuartige Möglichkeit zur Spülung und Reinigung des Lagerspaltes gegeben.As a result, a novel possibility for flushing and cleaning of the bearing gap is given.

In Figur 4 ist ein großer Rührer 1 dargestellt, wobei der Zapfen 15 einen größeren Durchmesser aufweist als die Zapfen der Rührer in den Figuren 1 bis 3. Der Zapfen 15 ist in diesem Ausführungsbeispiel durch den Spalttopf 8 gebildet. Im Zapfen 15 ist eine zentrische, senkrechte Durchgangsbohrung 28 vorgesehen. Oberhalb des Zapfens ist eine auf diesem aufliegende Befestigungsscheibe 29 mit Innengewinde 30 vorgesehen. Die Befestigungsscheibe 29 überragt die obere Stirnfläche der Lagerbuchse 13, wodurch sie eine Axialkraftkomponente des Rührerkopfes aufnehmen kann. Durch die Durchgangsbohrung 28 ist von der Spalttopfunterseite her eine Schraube 31 geführt, die in das Innengewinde 30 der Befestigungsscheibe 29 verschraubt ist und damit den Rührerkopf 2 am Spalttopf 8 fixiert und so gegen axiales Abheben sichert. Auch bei diesem Ausführungsbeispiel erfolgt also die Sicherung gegen axiales Abheben von der Spalttopfunterseite her.FIG. 4 shows a large stirrer 1, wherein the pin 15 has a larger diameter than the pins of the stirrer in FIGS. 1 to 3. The pin 15 is formed by the split pot 8 in this exemplary embodiment. In the pin 15 is a central, vertical through hole 28 is provided. Above the pin a resting on this mounting plate 29 is provided with internal thread 30. The mounting plate 29 projects beyond the upper end face of the bearing bush 13, whereby it can receive an axial force component of the stirrer head. Through the through hole 28 is from the split pot bottom her a screw 31 out, which is screwed into the internal thread 30 of the mounting plate 29 and thus the stirrer head 2 fixed to the split pot 8 and thus secures against axial lifting. Also in this embodiment, therefore, the backup takes place against axial lifting of the split pot bottom side.

Um ein Verdrehen der Befestigungsscheibe 29 zu verhindern, ist zwischen Zapfen 15 und Befestigungsscheibe 29 ein Sicherungsstift 32 vorgesehen. Der Sicherungsstift 32 kommt mit Vorteil nicht mit Produkt in Berührung.In order to prevent rotation of the mounting plate 29, 29, a locking pin 32 is provided between pin 15 and mounting plate. The locking pin 32 is advantageously not in contact with product.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Rührerstirrer
22
Rührerkopfstirrer head
33
Lagercamp
44
Rührwerkagitator
55
Kupplungclutch
66
antriebsseitiges Kupplungsteildrive-side coupling part
77
sekundäres Kupplungsteilsecondary coupling part
88th
Spalttopfcontainment shell
99
Montageflanschmounting flange
1010
Sicherungsringcirclip
1111
Behältercontainer
1212
O-RingO-ring
1313
Lagerbuchsebearing bush
13'13 '
Lagerbuchsebearing bush
1414
Lagerhülsebearing sleeve
1515
Zapfenspigot
1616
Kopfhead
1717
Verdrehsicherungtwist
1818
untere Ringflächelower ring surface
1919
obere Stirnseite der Lagerbuchseupper end of the bearing bush
2020
O-RingO-ring
2121
Anlaufscheibethrust washer
2222
Hohlraumcavity
2323
Öffnungenopenings
2424
Statorstator
2525
Scherkranzshearing crown
2626
Scherkranzshearing crown
2727
Leitungmanagement
2828
DurchgangsbohrungThrough Hole
2929
Befestigungsscheibemounting disk
3030
Innengewindeinner thread
3131
Schraube mit SicherungScrew with fuse
3232
Sicherungsstiftsafety pin

Claims (18)

  1. A stirrer for combining substances in the liquid phase, including a stirrer head (2) with a stirring tool (4) and with a coupling (5) for contactless, inductive or magnetic drive of the stirrer head (2), and a containment shell (8) secured in a container to accommodate the drive-side coupling member (6), means (15) being provided to prevent axial lifting of the stirrer head (2), characterised in that the stirrer head (2) is prevented from lifting axially by the underside of the containment shell, a screw being provided as the means (15) for securing the stirrer head (2).
  2. The stirrer as recited in claim 1, characterised in that the stirrer head (2), the bearing (3) and the means (15) for safeguarding the stirrer head (2) are conformed as a single unit.
  3. The stirrer as recited in either of the preceding claims, characterised in that the bearing (3) is situated above the containment shell (8) and is particularly conformed as a combination of axial and radial bearing.
  4. The stirrer as recited in any of the preceding claims, characterised in that a journal (15) with a head (16) is provided as the means for safeguarding the stirrer head (2), the journal (15) penetrates the bearing (3) preferably centrally and is fixed to the containment shell (8) either directly or indirectly, and the journal head (16) is disposed to absorb the one axial force component of the stirrer head (2).
  5. The stirrer as recited in any of the preceding claims, characterised in that the bearing (3) has the form of a lubricated sliding bearing with a bearing bush (13) mounted, preferably shrink-fitted, in the stirrer head (2), and a bearing sleeve (14) moving therein, the journal (15) penetrating the bearing sleeve (14) preferably centrally and the lower annular bearing surface of the journal head (16) at least partly covers the upper frontal face (19) of the bearing bushing (13).
  6. The stirrer as recited in any of the preceding claims, characterised in that the bearing sleeve (14) is conformed with a collar below the journal head (16), thus forming a thrust surface for the upper frontal face (19) of the bearing bushing (13).
  7. The stirrer as recited in any of the preceding claims, characterised in that a thrust surface for the lower frontal face of the bearing bushing (13) is provided below the bearing bushing (13).
  8. The stirrer as recited in any of the preceding claims, characterised in that the bearing (3) and/or the thrust surfaces are made from ceramic or high-performance plastic.
  9. The stirrer as recited in any of the preceding claims, characterised in that the journal is equipped with an anti-twist device.
  10. The stirrer as recited in any of the preceding claims, characterised in that the bearing bushing (13) is furnished with at least one connection aperture, and that means are provided for supplying liquid, particularly lubricant and flushing fluid, through this connection aperture into the bearing gap.
  11. The stirrer as recited in any of the preceding claims, characterised in that at least two bearing bushings (13) are provided and are disposed axially one above the other, and that means are provided for supplying liquid, particularly lubricant and flushing fluid, to the cavity between the bushings.
  12. The stirrer as recited in any of the preceding claims, characterised in that the containment shell (8) is realised as a welding flange.
  13. The stirrer as recited in any of the preceding claims, characterised in that the containment shell (8) is realised as a fitting flange.
  14. The stirrer as recited in claim 13, characterised in that the fitting flange is secured against axial displacement via a locking feature.
  15. The stirrer as recited in any of the preceding claims, characterised in that a concentric stator (24), preferably realised as a conduit tube, is provided in addition to the stirrer head (2) with stirring tool (4).
  16. The stirrer as recited in any of the preceding claims, characterised in that a concentric shearing crown (25) is provided in addition to the stirring tool (4), and is situated so as to rotate with the stirring tool (4), and that a shearing crown (26) concentric with this shearing crown (25) is provided on the stator (24).
  17. The stirrer as recited in any of the preceding claims, characterised in that the journal (15) is formed by the containment shell (8), or is attached integrally thereto, wherein the journal (15) is furnished with a vertical through hole (28), and a fixing disc (29) with internal thread (30) is provided above the journal (15), wherein the fixing disc (29) is disposed in such manner that it absorbs an axial force component of the stirrer, wherein a screw (28) is passed through the through hole (3) from the underside of the containment shell, and is screwed into the internal thread (3) of the fixing disc (29), thus preventing the stirrer head (2) from lifting axially.
  18. The stirrer as recited in claim 17, characterised in that a locking pin (32) is provided between the journal (15) and the fixing disc (29).
EP04002872A 2003-04-24 2004-02-10 Stirrer for mixing, homogenising and dispersing Expired - Lifetime EP1470856B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10318599 2003-04-24
DE10318599A DE10318599A1 (en) 2003-04-24 2003-04-24 Stirrer for mixing, homogenizing and dispersing

Publications (2)

Publication Number Publication Date
EP1470856A1 EP1470856A1 (en) 2004-10-27
EP1470856B1 true EP1470856B1 (en) 2006-08-23

Family

ID=32946419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002872A Expired - Lifetime EP1470856B1 (en) 2003-04-24 2004-02-10 Stirrer for mixing, homogenising and dispersing

Country Status (3)

Country Link
EP (1) EP1470856B1 (en)
AT (1) ATE337086T1 (en)
DE (2) DE10318599A1 (en)

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DE102016103968A1 (en) 2016-03-04 2017-09-07 Alexander Westphal Stirrer, in particular jet mixer and stirring device comprising a stirrer

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US7396153B2 (en) * 2005-04-05 2008-07-08 Andersson Per-Olof K Ultraclean magnetic mixer
EP1832762A1 (en) * 2006-03-10 2007-09-12 Borealis Technology Oy Hybrid bearings
DE102007054233B4 (en) * 2007-11-12 2010-06-10 Ika-Werke Gmbh & Co. Kg Device for dispersing or homogenizing
DE102009021992B3 (en) * 2009-05-19 2010-12-09 PRG Präzisions-Rührer GmbH Magnet stirring unit for use in sterile area of e.g. food industry for stirring different media, has control magnets and supporting magnet that are provided as electro magnets and connected with magnet control device
CN102658046A (en) * 2012-05-17 2012-09-12 慈溪特卡夫电器有限公司 Stirring device and milk frother with same
US10357748B2 (en) 2014-03-28 2019-07-23 Asepco Magnetically coupled mixer with thrust bearing friction control
DE102015106566B3 (en) * 2015-04-28 2016-06-09 PRG Präzisions-Rührer GmbH Drive unit for a stirrer and agitator
NL2019519B1 (en) * 2017-09-11 2019-03-19 Typhoon Group B V DEVICE FOR STIRING LIQUIDS AND LIQUID MIXTURES
CN108176316A (en) * 2018-03-12 2018-06-19 成都英德生物医药设备有限公司 A kind of lower magnetic suspension mixing plant
US11065589B2 (en) 2018-12-10 2021-07-20 Pall Corporation Radially driven agitator

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GB8530510D0 (en) * 1985-12-11 1986-01-22 Chem Plant Stainless Ltd Vessel
US4993841A (en) * 1987-02-05 1991-02-19 Steridose Systems Ab Magnetic impeller means for a mixing vessel
IT1225238B (en) * 1988-09-23 1990-11-02 Co Ra Di Lardieri Salvatore MAGNETIC DRIVE AGITATION GROUP
DE4232935C2 (en) * 1992-10-01 1996-03-28 Mavag Verfahrenstech Ag Magnetic stirrer
DE4232936C2 (en) * 1992-10-01 1996-03-28 Mavag Verfahrenstech Ag Impeller for stirring sterile liquids
DE4310266A1 (en) * 1993-03-30 1994-10-06 Draiswerke Gmbh mixer
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US6543928B2 (en) * 2001-05-04 2003-04-08 General Machine Company Of New Jersey, Inc. Processing vessel and method for mixing powders with a magnetically coupled agitator
DE20114076U1 (en) * 2001-08-29 2001-10-25 Hebold Gmbh & Co Kg App Und An Homogenizer, especially for the bottom of a mixing and stirring tank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016103968A1 (en) 2016-03-04 2017-09-07 Alexander Westphal Stirrer, in particular jet mixer and stirring device comprising a stirrer
DE102016103968B4 (en) 2016-03-04 2019-01-17 Alexander Westphal Stirrer, in particular jet mixer and stirring device comprising a stirrer

Also Published As

Publication number Publication date
DE10318599A1 (en) 2004-11-11
DE502004001234D1 (en) 2006-10-05
EP1470856A1 (en) 2004-10-27
ATE337086T1 (en) 2006-09-15

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