EP0525596B1 - Device for conveying, grinding and mixing of material to be conveyed with or without solid content - Google Patents

Device for conveying, grinding and mixing of material to be conveyed with or without solid content Download PDF

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Publication number
EP0525596B1
EP0525596B1 EP92112466A EP92112466A EP0525596B1 EP 0525596 B1 EP0525596 B1 EP 0525596B1 EP 92112466 A EP92112466 A EP 92112466A EP 92112466 A EP92112466 A EP 92112466A EP 0525596 B1 EP0525596 B1 EP 0525596B1
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EP
European Patent Office
Prior art keywords
stator
racks
rotor
gap
toothed
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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EP92112466A
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German (de)
French (fr)
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EP0525596A1 (en
Inventor
Manfred Latzel
Armin Stock
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hoelschertechnic-gorator GmbH
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hoelschertechnic-gorator GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D11/00—Other rotary non-positive-displacement pumps
    • F04D11/005—Swash-type impeller pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating

Definitions

  • the invention relates to a device for conveying, crushing and mixing conveyed material with and without solids content.
  • the device is used in particular in wastewater management and in every branch of industry in which the flow phase has to be homogenized, dispersed or treated. Another application is in the field of mixing processes.
  • the stator consists of a cylindrical drum with inwardly directed teeth which mesh with the teeth of the rotor at a distance.
  • the inside of this stator drum is in flow connection to the inlet opening via an end opening and to the outlet opening via slots or bores provided in the region of this outlet opening in the cylinder wall of the stator.
  • the rest of the cylinder wall has no openings.
  • stator drum is designed as a one-piece component, the teeth projecting inwards having to be produced in a costly manner on a lathe.
  • the drum is to be provided with slots or openings at the predetermined point, so that the material to be conveyed can exit the interior of the drum in the region of the discharge opening.
  • a further disadvantage is that the material to be conveyed can only pass through the stator cylinder wall at the point of the discharge opening, so that there is a constriction here for the material flow.
  • the stator wall consists of a one-piece cylinder, which is provided on the inside with zanniform ribs. Openings are formed in the ribs to enable the material to flow through the screw-shaped discharge gap to the discharge opening.
  • a conveyor for suspensions and viscous substances with a basket-like perforated housing is known.
  • This housing consists of adjacent rack-like elements, which are received in their respective ends in ring grooves. These ring grooves are formed on flanges that form the upper and lower edges of the basket-like housing. In order to keep the racks at a distance, projections are formed on the side walls, which are supported on the respective neighboring element.
  • This design has the disadvantage that an additional material accumulation can take place in the gap between the rack elements, which builds up on the projections.
  • the invention has for its object to provide a device of the type mentioned, the stator ensures simple and inexpensive training an undisturbed outflow of the material to be conveyed.
  • the stator cylinder now essentially consists of two fixing rings, which are each arranged on the end face, and of a large number of toothed racks, which are particularly easy to manufacture in terms of production.
  • the fixing rings are advantageously equipped on their circular outer circumference with wings, the thickness of which in the circumferential direction defines the spacing of the toothed racks and thus the gap width between the toothed racks. This measure eliminates the costly machining to produce through openings for the material to be comminuted or comminuted.
  • the wings are provided on the fixing ring only over part of the circumference of the fixing ring and the Racks are arranged side by side in the remaining peripheral area without a gap.
  • the toothed racks may also be expedient to design the toothed racks as a two-component part, the toothed part of the toothed rack being able to consist of a material which is adapted to the later field of application of the device.
  • This tooth part can be soldered or screwed to the carrier part.
  • the housing has a helical cross section, the discharge gap between the outer circumference of the stator and the inner wall of the housing continuously widening in the circumferential direction towards the discharge opening.
  • a particularly advantageous measure can be seen in the fact that the gap between the toothed racks of the stator and the gap distance between the teeth of the stator and the rotor that passes by is the same. In this way the Shredding effect not only between the teeth brushing past each other, but also caused by the passage of the conveyed material through the gap between the toothed racks, whereby the quality of the shredding and the efficiency are significantly increased.
  • FIG. 1 is a sectional view of a device for conveying, crushing and mixing of conveyed material with and without solids content, as is common in wastewater technology.
  • the device has a housing 2 with a shaft stub 3 projecting into it, on which a rotor 7 is attached in a rotationally fixed manner.
  • the housing 2 is provided on the end face with an entry opening 4 and at an angle to the shaft axis 5 with an exit opening 6.
  • the discharge opening 6 can intersect the shaft axis with its axis or be suitably located tangentially to a suitable circumferential diameter in such a way that a favorable flow behavior is achieved.
  • a cylindrical stator 8 is received in the housing, in which the rotor fixed on the stub shaft 3 rotates.
  • the cylindrical stator 8 has an annular toothing 9 which meshes with teeth correspondingly formed on the rotor 7.
  • the rotor consists of an inclined disc, as is known in the prior art. Because of the oblique arrangement leads the disc wobbles in the axial direction, with the result that a pumping action is brought about due to the centrifugal acceleration of the conveyed material.
  • the stator 8 consists of individual racks 13, which are each held at the cylindrical ends of the stator by two fixing rings 15.
  • the fixing rings 15 have on their outer circumference, depending on the application, over the entire outer circumference or only over a partial area of wings 16 (see FIG. 2), which, due to their material thickness, define the gap distance 17 between the toothed racks 13.
  • a discharge gap 20 is provided between the outer wall 21 of the cylindrical stator 8 and the inner wall 22 of the housing 2, which has a constant width over the entire circumference.
  • the housing is offset eccentrically to the shaft axis 5 or is designed to widen in a helical shape, so that the discharge gap widens continuously over the circumference and the material to be conveyed can flow more easily over the entire stator circumference to the discharge gap and to the discharge opening 6.
  • the racks of the cylindrical stator 8 are fixed over the entire circumference with a gap distance to the adjacent rack on the fixing rings 15, so that the material to be conveyed and crushed can escape over the entire circumferential surface of the cylinder and thus offers only an extremely low flow resistance .
  • FIG. 6 shows a three-bladed rotor, the teeth of which are designed as a separate tooth part 23.
  • the toothed part 23, in FIG. 3 in a single illustration, has a device in the area facing the rotor for fixing the toothed part to the actual rotor.
  • this device consists of a projecting tab 24 which can be inserted into a corresponding cutout in the rotor and screwed there.
  • this toothed part can be made in two parts, the actual toothed area 18 consisting of a hardenable or hardened material, the actual support area (19) consisting of a simple cast steel that is adapted to the function.
  • FIG. 5 shows a further type of fastening for the tooth part on the rotor in section, the fixing being carried out either by means of a soldered connection or by means of a screw connection at the end.
  • the design of the stator cylinder in the form of racks standing next to one another at a distance makes it possible to make the gap 28 between the teeth of the stator and the teeth of the rotor particularly narrow, a distance dimension which has proven particularly advantageous to correspond to the distance dimension of the racks from one another , such as 1.6 mm rack distance and 1.6 mm distance between the teeth of the rotor and the teeth of the stator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Paints Or Removers (AREA)
  • Transmission Devices (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Detergent Compositions (AREA)
  • Physical Water Treatments (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Switches With Compound Operations (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

A device for grinding and mixing material to be conveyed with and without a solid content is disclosed, in which the stator (8) which is equipped with inwardly projecting teeth consists of a plurality of toothed racks (13) which are arranged one next to the other. These toothed racks (13) are held on the end sides of the stator (8) in fixing rings (15). The toothed racks (13) can each have a gap spacing 17 from one another which is defined by wings (16) formed on the fixing rings. The toothed regions of the rotor (7), like those of the toothed racks (13), can be arranged in a replaceable fashion. Between the inner wall (22) of the housing (2) and the outer wall (21) of the stator cylinder, a discharge gap (20) is provided which, in a particular embodiment, grows bigger in a worm-shape in the direction of the discharge opening (6). <??>The field of application is the sanitation industry. <IMAGE>

Description

Die Erfindung betrifft eine eine Vorrichtung zum Fördern, Zerkleinern und Mischen von Fördergut mit und ohne Feststoffgehalt.The invention relates to a device for conveying, crushing and mixing conveyed material with and without solids content.

Die Vorrichtung gelangt insbesondere zum Einsatz in der Abwasserwirtschaft sowie in jedem Industriezweig, in dem in der Fließphase homogenisiert, dispergiert oder aufbereitet werden muß. Weitere Anwendung ist das Gebiet der Mischvorgänge.The device is used in particular in wastewater management and in every branch of industry in which the flow phase has to be homogenized, dispersed or treated. Another application is in the field of mixing processes.

Eine derartige Vorrichtung ist aus DE OS 14 03 854 bekannt. Bei einer solchen Vorrichtung besteht der Stator aus einer zylindrischen Trommel mit nach innen gerichteten Zähnen, die mit den Zähnen des Rotors im Abstand kämmen. Das Innere dieser Statortrommel steht zur Eintragsöffnung über eine stirnseitige Öffnung und zur Austragsöffnung über im Bereich dieser Austragsöffnung vorgesehene Schlitze oder Bohrungen in der Zylinderwand des Stators in Strömungsverbindung. Die übrige Zylinderwand weist keine Öffnungen auf.Such a device is known from DE OS 14 03 854. In such a device, the stator consists of a cylindrical drum with inwardly directed teeth which mesh with the teeth of the rotor at a distance. The inside of this stator drum is in flow connection to the inlet opening via an end opening and to the outlet opening via slots or bores provided in the region of this outlet opening in the cylinder wall of the stator. The rest of the cylinder wall has no openings.

Diese bekannte Vorrichtung hat den Nachteil, daß die Statortrommel als einteiliges Bauteil ausgebildet ist, wobei die nach innen ragenden Zähne kostenaufwendig auf einer Drehmaschine hergestellt werden müssen. Anschließend ist an der vorbestimmten Stelle die Trommel mit Schlitzen oder Öffnungen zu versehen, damit das Fördergut im Bereich der Austragsöffnung aus dem Trommelinneren austreten kann.This known device has the disadvantage that the stator drum is designed as a one-piece component, the teeth projecting inwards having to be produced in a costly manner on a lathe. Subsequently, the drum is to be provided with slots or openings at the predetermined point, so that the material to be conveyed can exit the interior of the drum in the region of the discharge opening.

Des weiteren ist von Nachteil, daß das zu fördernde Gut lediglich an der Stelle der Austragsöffnung durch die Statorzylinderwand hindurchtreten kann, so daß sich hier eine Engstelle für den Fördergutstrom ergibt.A further disadvantage is that the material to be conveyed can only pass through the stator cylinder wall at the point of the discharge opening, so that there is a constriction here for the material flow.

Aus der DE-AS 14 03 857 ist eine Vorrichtung zum Zerkleinern und Fördern von mit Flüssigkeit durchsetzten Feststoffen bekannt, bei der das Gehäuse schneckenförmig ausgebildet ist.From DE-AS 14 03 857 a device for crushing and conveying solids interspersed with liquid is known, in which the housing is helical.

Die Statorwand besteht aus einem einstückigen Zylinder, der an der Innenseite mit zannförmigen Rippen versehen ist. In den Rippen sind Öffnungen ausgebildet, um es dem Gut zu ermöglichen, durch den schneckenförmigen Austragsspalt zur Austragsöffnung zu fließen.The stator wall consists of a one-piece cylinder, which is provided on the inside with zanniform ribs. Openings are formed in the ribs to enable the material to flow through the screw-shaped discharge gap to the discharge opening.

Aus der DE-OS 21 52 704 ist eine Fördermaschine für Suspensionen und zähflüssige Stoffe mit einem korbähnlich durchbrochenen Gehäuse bekannt. Dieses Gehäuse besteht aus nebeneinander angeordneten zahnstangenähnlichen Elementen, die an ihren jeweiligen Enden in Ringnuten aufgenommen sind. Diese Ringnuten sind an Flanschen ausgebildet, die den oberen und unteren Rand des korbähnlichen Gehäuses bilden. Um die Zahnstangen auf Abstand zu halten, sind an den seitlichen Wänden Vorsprünge ausgebildet, die sich an dem jeweiligen Nachbarelement abstützen.From DE-OS 21 52 704 a conveyor for suspensions and viscous substances with a basket-like perforated housing is known. This housing consists of adjacent rack-like elements, which are received in their respective ends in ring grooves. These ring grooves are formed on flanges that form the upper and lower edges of the basket-like housing. In order to keep the racks at a distance, projections are formed on the side walls, which are supported on the respective neighboring element.

Diese Ausbildung hat den Nachteil, daß eine zusätzliche Materialanhäufung im Spalt zwischen den Zahnstangenelementen stattfinden kann, die sich an den Vorsprüngen staut.This design has the disadvantage that an additional material accumulation can take place in the gap between the rack elements, which builds up on the projections.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der genannten Gattung zu schaffen, deren Stator bei einfacher und kostengünstiger Ausbildung einen ungestörten Abfluß des Förderguts gewährleistet.The invention has for its object to provide a device of the type mentioned, the stator ensures simple and inexpensive training an undisturbed outflow of the material to be conveyed.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des Hauptanspruches gelöst.
Gemäß den genannten Merkmalen besteht der Statorzylinder nunmehr im wesentlichen aus zwei Fixierringen, die jeweils stirnseitig angeordnet sind, sowie aus einer Vielzahl von Zahnstangen, die herstellungsmäßig besonders einfach zu fertigen sind.The object is achieved by the features of the main claim.
According to the features mentioned, the stator cylinder now essentially consists of two fixing rings, which are each arranged on the end face, and of a large number of toothed racks, which are particularly easy to manufacture in terms of production.

Das aufwendige Handhaben eines kompletten Statorzylinders in einer Drehmaschine bzw. auf einer Fräsmaschine entfällt. Darüberhinaus besteht der Vorteil, daß die Fixierringe als Gußteil ebenfalls zur Kostensenkung beitragen.The time-consuming handling of a complete stator cylinder in a lathe or on a milling machine is eliminated. In addition, there is the advantage that the fixing rings as castings also contribute to reducing costs.

Vorteilhafterweise sind die Fixierringe an ihrem kreisförmigen Außenumfang mit Flügeln ausgestattet, deren Dicke in Umfangsrichtung den Abstand der Zahnstangen und somit die Spaltenbreite zwischen den Zahnstangen festlegt. Durch diese Maßnahme entfällt die kostenaufwendige spanabhebende Bearbeitung zum Erzeugen von Druchtrittsöffnungen für das zerkleinerte bzw. zu zerkleindernde Fördergut.The fixing rings are advantageously equipped on their circular outer circumference with wings, the thickness of which in the circumferential direction defines the spacing of the toothed racks and thus the gap width between the toothed racks. This measure eliminates the costly machining to produce through openings for the material to be comminuted or comminuted.

Vorteilhaft kann es bei bestimmten Ausführungsformen der Vorrichtung sein, daß die Flügel am Fixierring nur über einen Teil des Umfangs des Fixierrings vorgesehen und die Zahnstangen im übrigen Umfangsbereich ohne Spalt nebeneinander angeordnet sind.It can be advantageous in certain embodiments of the device that the wings are provided on the fixing ring only over part of the circumference of the fixing ring and the Racks are arranged side by side in the remaining peripheral area without a gap.

Durch den höheren Wirkungsgrad ist der Energieaufwand im Vergleich zu üblichen Aggregaten bei besserer Qualität des Bearbeitungsergebnisses wesentlich geringer.Due to the higher efficiency, the energy consumption is significantly lower compared to conventional units with better quality of the machining result.

Günstig kann es auch sein, die Zahnstangen als Zweikomponententeil auszubilden, wobei der Zahnteil der Zahnstange aus einem Material bestehen kann, das dem späteren Einsatzgebiet der Vorrichtung angepaßt ist. Dieser Zahnteil kann am Trägerteil verlötet oder verschraubt sein.It may also be expedient to design the toothed racks as a two-component part, the toothed part of the toothed rack being able to consist of a material which is adapted to the later field of application of the device. This tooth part can be soldered or screwed to the carrier part.

Eine besonders vorteilhafte Maßnahme kann darin gesehen werden, daß das Gehäuse im Querschnitt schneckenförmig ausgebildet ist, wobei sich der Austragsspalt zwischen dem Statoraußenumfang und der Gehäuseinnenwand in Umfangsrichtung zur Austragsöffnung hin kontinuierlich erweitert.A particularly advantageous measure can be seen in the fact that the housing has a helical cross section, the discharge gap between the outer circumference of the stator and the inner wall of the housing continuously widening in the circumferential direction towards the discharge opening.

Bei den Ausführungsformen mit Austragsspalt zwischen Gehäuseinnenwand und Gehäuseaußenumfang ist es günstig, daß sämtliche Zahnstangen des Stators einen Spalt zur Nachbarzahnstange aufweisen.In the embodiments with a discharge gap between the inner wall of the housing and the outer circumference of the housing, it is advantageous for all the racks of the stator to have a gap with the neighboring rack.

Eine weitere vorteilhafte Ausgestaltung, die zur Kostenreduzierung beiträgt, kann darin gesehen werden, daß die Verzahnung des Rotors als auswechselbares Zahnteil ausgebildet ist.Another advantageous embodiment, which contributes to cost reduction, can be seen in the fact that the toothing of the rotor is designed as an interchangeable tooth part.

Eine besonders vorteilhafte Maßnahme ist darin zu sehen, daß der Spalt zwischen den Zahnstangen des Stators und der Spaltabstand zwischen den Zähnen des Stators und des vorbeistreichenden Rotors gleich ist. Auf diese Weise wird der Zerkleinerungseffekt nicht nur zwischen den einander vorbeistreichenden Zähnen, sondern ebenfalls durch das Hindurchtreten des Förderguts durch den Spalt zwischen den Zahnstangen hindurch bewirkt, wodurch die Qualität der Zerkleinerung sowie der Wirkungsgrad wesentlich erhöht werden.A particularly advantageous measure can be seen in the fact that the gap between the toothed racks of the stator and the gap distance between the teeth of the stator and the rotor that passes by is the same. In this way the Shredding effect not only between the teeth brushing past each other, but also caused by the passage of the conveyed material through the gap between the toothed racks, whereby the quality of the shredding and the efficiency are significantly increased.

Im folgenden werden Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen:

Fig. 1
einen Axialschnitt durch eine komplett zusammengebaute Vorrichtung mit schräg stehender Rotorscheibe und Zahnstangenstator.
Fig. 2
eine perspektivische Darstellung eines Teils eines aus Zahnstangen bestehenden Stators mit Fixierring,
Fig. 3
ein Zahnteil eines Rotors,
Fig. 4
ein Querschnitt durch eine Vorrichtung mit konstantem umlaufenden Austragsspalt,
Fig. 4b
eine alternative Ausbildung mit schneckenförmig oder spiralförmigem Gehäuse und sich kontinuierlich erweiterndem Austragsspalt,
Fig. 5
eine Teilschnittansicht zur Befestigung eines Zahnteils an einem Rotorflügel, und
Fig. 6
eine perspektivische Darstellung eines Rotors mit daran angeordneten Zahnteilen.
Exemplary embodiments of the invention are explained in more detail below. Show it:
Fig. 1
an axial section through a completely assembled device with an inclined rotor disc and rack stator.
Fig. 2
1 shows a perspective illustration of part of a stator consisting of toothed racks with a fixing ring,
Fig. 3
a tooth part of a rotor,
Fig. 4
2 shows a cross section through a device with a constant circumferential discharge gap,
Fig. 4b
an alternative design with a helical or spiral housing and a continuously widening discharge gap,
Fig. 5
a partial sectional view for fastening a tooth part to a rotor blade, and
Fig. 6
a perspective view of a rotor with tooth parts arranged thereon.

In Fig. 1 ist eine Schnittdarstellung einer Vorrichtung zum Fördern, Zerkleinern und Mischen von Fördergut mit und ohne Feststoffgehalt, wie sie in der Abwassertechniküblich ist. Die Vorrichtung weist ein Gehäuse 2 auf mit einem in dieses hineinrangenden Wellenstumpf 3, an dem ein Rotor 7 drehfest angebracht ist. Das Gehäuse 2 ist stirnseitig mit einer Eintragsöffnung 4 und im rechten Winkel zur Wellenachse 5 mit einer Austragsöffnung 6 ausgestattet. Die Austragsöffnung 6 kann dabei mit ihrer Achse die Wellenachse schneiden oder in geeigneter Weise tangential an einen geeigneten Umkreisdurchmesser so gelegen sein, daß ein günstiges Strömungsverhalten erzielt wird.In Fig. 1 is a sectional view of a device for conveying, crushing and mixing of conveyed material with and without solids content, as is common in wastewater technology. The device has a housing 2 with a shaft stub 3 projecting into it, on which a rotor 7 is attached in a rotationally fixed manner. The housing 2 is provided on the end face with an entry opening 4 and at an angle to the shaft axis 5 with an exit opening 6. The discharge opening 6 can intersect the shaft axis with its axis or be suitably located tangentially to a suitable circumferential diameter in such a way that a favorable flow behavior is achieved.

In dem Gehäuse ist ein zylindrischer Stator 8 aufgenommen, in welchem der auf dem Wellenstumpf 3 befestigte Rotor dreht. Der zylindrisch ausgebildete Stator 8 weist eine ringförmig verlaufende Zahnung 9 auf, die mit entsprechend an dem Rotor 7 ausgebildeten Zähnen kämmt.A cylindrical stator 8 is received in the housing, in which the rotor fixed on the stub shaft 3 rotates. The cylindrical stator 8 has an annular toothing 9 which meshes with teeth correspondingly formed on the rotor 7.

In der in Fig. 1 dargestellten Ausführungsform besteht der Rotor aus einer schräg stehenden Scheibe, wie sie im Stand der Technik bekannt ist. Wegen der schrägen Anordnung führt die Scheibe Taummelbewegungen in axialer Richtung aus, mit dem Ergebnis, daß eine Pumpwirkung aufgrund der Zentrifugalbeschleunigung des Förderguts bewirkt wird.In the embodiment shown in FIG. 1, the rotor consists of an inclined disc, as is known in the prior art. Because of the oblique arrangement leads the disc wobbles in the axial direction, with the result that a pumping action is brought about due to the centrifugal acceleration of the conveyed material.

Der Stator 8 besteht aus einzelnen Zahnstangen 13, die jeweils an den zylindrischen Enden des Stators von zwei Fixierringen 15 gehalten sind. Die Fixierringe 15 weisen an ihrem Außenumfang je nach Einsatz über den gesamten Außenumfang oder lediglich über einen Teilbereich Flügel 16 auf (vergl. Fig. 2), die durch ihre Materialdicke den Spaltabstand 17 zwischen den Zahnstangen 13 festlegen.The stator 8 consists of individual racks 13, which are each held at the cylindrical ends of the stator by two fixing rings 15. The fixing rings 15 have on their outer circumference, depending on the application, over the entire outer circumference or only over a partial area of wings 16 (see FIG. 2), which, due to their material thickness, define the gap distance 17 between the toothed racks 13.

In Fig. 4a ist zwischen der Außenwand 21 des zylindrischen Stators 8 und der Innenwand 22 des Gehäuses 2 ein Austragsspalt 20 vorgesehen, der über den gesamten Umfang hinweg eine gleichbleibende Breite besitzt.In Fig. 4a, a discharge gap 20 is provided between the outer wall 21 of the cylindrical stator 8 and the inner wall 22 of the housing 2, which has a constant width over the entire circumference.

Bei den Ausführungsbeispielen gem. Fig.4b hingegen ist das Gehäuse zur Wellenachse 5 exzentrisch versetzt oder sich schneckenförmig erweiternd ausgebildet, so daß sich der Austragsspalt über den Umfang hinweg kontinuierlich erweitert und das Fördergut leichter über den gesamten Statorumfang zum Austragsspalt und zur Austragsöffnung 6 fließen kann.In the embodiments according to. 4b, however, the housing is offset eccentrically to the shaft axis 5 or is designed to widen in a helical shape, so that the discharge gap widens continuously over the circumference and the material to be conveyed can flow more easily over the entire stator circumference to the discharge gap and to the discharge opening 6.

Bei beiden Ausführungsformen sind die Zahnstangen des zylindrischen Stators 8 über den gesamten Umfang hinweg mit einem Spaltabstand zur benachbarten Zahnstange an den Fixierringen 15 festgelegt, so daß das zu fördernde und zu zerkleindernde Gut über die gesamte Zylinderumfangsfläche austreten kann und somit nur einen äußerst geringen Strömungswiderstand bietet.In both embodiments, the racks of the cylindrical stator 8 are fixed over the entire circumference with a gap distance to the adjacent rack on the fixing rings 15, so that the material to be conveyed and crushed can escape over the entire circumferential surface of the cylinder and thus offers only an extremely low flow resistance .

In Fig. 6 ist ein dreiflügliger Rotor widergegeben, dessen Zahnung als separates Zahnteil 23 ausgebildet ist. Das Zahnteil 23, in Fig. 3 in Einzeldarstellung weist in dem rotorzugekehrten Bereich eine Vorrichtung zum Festlegen des Zahnteils am eigentlichen Rotor auf. Diese Vorrichtung besteht beim dargestellten Ausführungsbeispiel aus einer vorspringenden Lasche 24, die in eine entsprechende Ausfräsung im Rotor einsetzbar und dort festschraubbar ist.6 shows a three-bladed rotor, the teeth of which are designed as a separate tooth part 23. The toothed part 23, in FIG. 3 in a single illustration, has a device in the area facing the rotor for fixing the toothed part to the actual rotor. In the exemplary embodiment shown, this device consists of a projecting tab 24 which can be inserted into a corresponding cutout in the rotor and screwed there.

Für bestimmte Anwendungsfälle kann dieses Zahnteil ebenso wie die Zahnstangen 13 zweiteilig ausgeführt sein, wobei der eigentliche Zahnbereich 18 aus einem härtbaren oder gehärtetem Material besteht, der eigentliche Trägerbereich (19) aus einem einfachen, der Funktion angepaßten Gußstahl.For certain applications, this toothed part, like the toothed racks 13, can be made in two parts, the actual toothed area 18 consisting of a hardenable or hardened material, the actual support area (19) consisting of a simple cast steel that is adapted to the function.

In Fig. 5 ist eine weitere Befestigungsart für den Zahnteil an dem Rotor im Schnitt dargestellt, wobei das Festlegen entweder über eine Lötverbindung oder mittels einer Stirnseitigen Verschraubung vollzogen wird. Die Ausbildung des Statorzylinders in Form von im Abstand nebeneinander stehenden Zahnstangen ermöglicht es, den Spalt 28 zwischen den Zähnen des Stators und den Zähnen des Rotors besonders eng zu gestalten, wobei sich ein Abstandsmaß als besonders vorteilhaft herausgestellt hat, das dem Abstandsmaß der Zahnstangen untereinander entspricht, wie z.B. 1.6 mm Zahnstangenabstand und 1.6 mm Abstand zwischen den Zähnen des Rotors und den Zähnen des Stators.5 shows a further type of fastening for the tooth part on the rotor in section, the fixing being carried out either by means of a soldered connection or by means of a screw connection at the end. The design of the stator cylinder in the form of racks standing next to one another at a distance makes it possible to make the gap 28 between the teeth of the stator and the teeth of the rotor particularly narrow, a distance dimension which has proven particularly advantageous to correspond to the distance dimension of the racks from one another , such as 1.6 mm rack distance and 1.6 mm distance between the teeth of the rotor and the teeth of the stator.

Bei besonderen Ausführungsformen kann es jedoch günstig sein, den Zwischenraum zwischen den Rotorzähnen und den zugeordneten Zähnen des Stators geringer zu halten als der Abstand der Zahnstangen untereinander. Andererseits kann es günstig sein, bei einem Fördergut, das mit besonders hohem Anteil an Feststoffen versetzt ist, den Abstand zwischen den Zähnen des Rotors und dem Stator größer zu gestalten, als der Spaltabstand zwischen den Zahnstangen.In special embodiments, however, it may be expedient to change the space between the rotor teeth and the associated one To keep teeth of the stator smaller than the distance between the racks. On the other hand, it can be favorable to make the distance between the teeth of the rotor and the stator larger than the gap distance between the toothed racks in the case of a conveyed material which has a particularly high proportion of solids.

Claims (11)

  1. Device for conveying, grinding and mixing material to be conveyed with or without a solids content, comprising a housing (2) and a stub shaft (3) projecting into the latter, an inlet opening (4) opposite the stub shaft and at least one discharge opening (6) extending at right angles to the stub shaft axis (5), a rotor (7) secured to the stub shaft and extending as far as the inlet opening and a stator (8) with a cylindrical toothed stator wall (11) arranged in the housing, the rotor also being toothed and meshing with the toothing of the racks (13), the material to be conveyed, ground and mixed being pressed through the gap between the racks (13) and being conveyed via a discharge gap (20) provided between the inner wall (22) of the housing and the outer circumference (21) of the stator to the discharge opening, characterised in that the stator (8) is formed of individual racks (13) which have a predetermined gap spacing (17) from one another, the racks (13) being held at the cylindrical ends (14) of the stator (8) by means of two fixing rings (15) provided on their annular outer circumferences with blades (16), the thickness of which in the circumferential direction determines the spacing of the racks (13) and thus the gap width (17) between the racks.
  2. Device according to claim 1, characterised in that the blades (16) on the fixing ring (15) are provided over only part of the circumference of the fixing ring and the racks (13) are arranged alongside one another without leaving any gaps in the remaining circumferential region.
  3. Device according to one of the abovementioned claims, characterised in that the rack (13) is a two-component part, the material of the toothed part (18) being particularly selected in accordance with the operating conditions.
  4. Device according to one of the preceding claims, characterised in that the, e.g. abrasion-resistant toothed part (18) is soldered to the carrier part (19).
  5. Device according to one of the preceding claims, characterised in that the toothed part is screwed on to the carrier part.
  6. Device according to one of the preceding claims, in particular characterised in that the discharge gap (20) between the outer circumference (21) of the stator and the inner wall (22) of the housing expands continuously in the circumferential direction and in the operating direction towards the discharge opening (6).
  7. Device according to claim 5 or claim 6, characterised in that all of the racks (13) of the stator (8) have a gap spacing (17) from the adjacent rack.
  8. Device according to one of the preceding claims, in particular characterised in that the toothing of the rotor (7) is a replaceable toothed part (23).
  9. Device according to claim 8, characterised in that the toothed part (23) of the rotor (7) has one or more securing devices (24) which allow for local fixing of the rack part (23) relative to the rest of the rotor.
  10. Device according to claims 8 and 9, characterised in that the replaceable toothed part (23) is screwed tightly on to the rotor (7).
  11. Device according to at least one of the preceding claims, in particular characterised in that the gap (28) between the racks (13) of the stator (8) is identical to the gap spacing (17) between the teeth of the stator (8) and the passing rotor (7).
EP92112466A 1991-07-23 1992-07-21 Device for conveying, grinding and mixing of material to be conveyed with or without solid content Expired - Lifetime EP0525596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124408A DE4124408C2 (en) 1991-07-23 1991-07-23 Device for conveying, crushing and mixing conveyed material with and without solids content
DE4124408 1991-07-23

Publications (2)

Publication Number Publication Date
EP0525596A1 EP0525596A1 (en) 1993-02-03
EP0525596B1 true EP0525596B1 (en) 1995-12-20

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US (1) US5242124A (en)
EP (1) EP0525596B1 (en)
JP (1) JPH05228389A (en)
CN (1) CN1069910A (en)
AT (1) ATE131747T1 (en)
CA (1) CA2074003A1 (en)
CZ (1) CZ227692A3 (en)
DE (1) DE4124408C2 (en)
FI (1) FI923353A (en)
NO (1) NO922900L (en)
PL (1) PL295322A1 (en)
RU (1) RU2060827C1 (en)
SI (1) SI9200150A (en)
TW (1) TW227530B (en)

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DE102011007960B3 (en) * 2011-01-05 2012-06-28 Schmalenberger Gmbh & Co. Kg Pump for use with machine tool for conveying metal shavings contaminated coolant, has cutting mechanism comprising cutting body, and wear plate provided in pump housing, where cutting plate is detachably secured on cutting mechanism
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Also Published As

Publication number Publication date
CA2074003A1 (en) 1993-01-24
PL295322A1 (en) 1993-02-22
NO922900D0 (en) 1992-07-22
US5242124A (en) 1993-09-07
TW227530B (en) 1994-08-01
CZ227692A3 (en) 1993-02-17
NO922900L (en) 1993-01-25
FI923353A (en) 1993-01-24
EP0525596A1 (en) 1993-02-03
SI9200150A (en) 1993-03-31
RU2060827C1 (en) 1996-05-27
JPH05228389A (en) 1993-09-07
DE4124408C2 (en) 1996-06-13
CN1069910A (en) 1993-03-17
DE4124408A1 (en) 1993-01-28
FI923353A0 (en) 1992-07-23
ATE131747T1 (en) 1996-01-15

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