EP0723081B1 - Anger pump for conveying fluid material - Google Patents

Anger pump for conveying fluid material Download PDF

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Publication number
EP0723081B1
EP0723081B1 EP95120203A EP95120203A EP0723081B1 EP 0723081 B1 EP0723081 B1 EP 0723081B1 EP 95120203 A EP95120203 A EP 95120203A EP 95120203 A EP95120203 A EP 95120203A EP 0723081 B1 EP0723081 B1 EP 0723081B1
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EP
European Patent Office
Prior art keywords
stator
hoses
pump
eccentric
rotor
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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EP95120203A
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German (de)
French (fr)
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EP0723081A1 (en
Inventor
Klemens Fockenberg
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Seepex GmbH
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Seepex Seeberger GmbH and Co
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Publication of EP0723081A1 publication Critical patent/EP0723081A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1076—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member orbits or wobbles relative to the other member which rotates around a fixed axis

Definitions

  • a worm pump of the construction described above is made known by GB-A-2 029 514.
  • This points including one driven by a drive axle helically wound eccentric screw rotor with constant circular cross section.
  • the one in a stator room longitudinal elastic hoses are by means of end plates through the stator.
  • openings are provided in the aforementioned plates.
  • central openings that accommodate the recording serve a drive or rotational axis.
  • the gap play or Fit between eccentric screw rotor and stator like this adjust that this is about twice the wall thickness of the corresponds to elastic hoses. Consequently, attack the Hoses running in the longitudinal direction to which can lead to unavoidable damage. Especially can be stretched, for example in connection with Aging effects can lead to tearing, not to be excluded.
  • the invention is based on the technical problem Worm pump of the construction described above with regard Improve resistance and wear problems.
  • the invention teaches to solve this technical problem in a generic screw pump for flowable Pump material that the stator chamber is longitudinal, partially cylindrical Stator wall sections and at least two between the Stator wall sections longitudinal cavities for the has resilient hoses disposed therein, and that the stator wall sections with a clearance to the Sum of eccentricity distance and cross section radius of the Eccentric screw rotor adapted radius.
  • the invention is based on the knowledge that despite of the open, helical channel between the eccentric screw rotor and the partially cylindrical stator wall sections can achieve a promotional effect if the stator between the stator wall sections with longitudinal Cavities and hoses arranged in them is provided: between the longitudinal hoses and the helical circumferential areas of the Eccentric screw rotor creates cutting areas with Sealing lines used to generate lengthways spaced sealing areas of the hoses are used. Sealing areas and conveying spaces enclosed between them by rotating the eccentric screw rotor in the conveying direction moved so that the pumped material is conveyed.
  • Auger pump multi-flow that is, for simultaneous Promotion of several, independent pump material flows suitable.
  • the pumping material is conveyed in sections compressed hoses is basically known as Peristaltic pumps known from practice (see Ullmanns Encyclopedia of Technical Chemistry, 1973, Volume 3, page 169).
  • a hose through several, along the Hose moving displacers such as rollers or Sliding shoes compressed.
  • a multi-flow arrangement requires and is an increase in the number of these displacers constructively complex.
  • the hoses while reducing their lifespan in the longitudinal direction stretched.
  • the screw pump according to the invention produces on the other hand, no expansion of the hoses because of frictional forces between rotor and hose essentially only in the circumferential direction of the eccentric screw rotor act.
  • the eccentric screw rotor not only with one, but with several gears. Due to the increase in the length of the pump stator Number of sealing areas can be the tightness of the Increase the screw pump and the achievable pressure.
  • the Pump stator of the screw pump according to the invention can are basically made of any material. For The use of a has been gentle on the hoses elastic material with a hardness between 90 and 95 Shore A especially proven. Regarding an even and low pulsation running of the screw pump, it is from Advantage, cavities and hoses equidistant on the Distribute the circumference of the stator space.
  • Another preferred embodiment lie to promote the same Hoses serving the goods to be pumped on each other in pairs opposite the circumference of the stator space, so that at one later merging of the streams does not equal pumped goods Pulsation occurs.
  • Another preferred embodiment provides for hoses in the cavities different diameters are recordable. Hereby different amounts in the individual tubes are funded by Pumpgut. The ratio of the funded The quantity depends on the speed and gradient of the eccentric screw rotor and thus the total output independently, so that the device according to the invention be used especially for dosing and mixing tasks can, with the control of various individual pumps There is no change in the total output. It goes without saying that the depths and breadth of the cavities the different hose diameters can be adjusted.
  • the device shown in the figures serves as a screw pump for flowable pump material.
  • the necessary ones Units for drive, storage of the eccentric screw rotor as well as for the supply and removal of the pumped goods have been improved Clarity not shown.
  • FIG. 1 shows hatched the circular cross section of the Eccentric screw rotor.
  • the center 3 of the eccentric screw rotor points to the axis of rotation 4 Eccentricity distance e on.
  • the pump stator 5 includes one Stator chamber 6, in which the eccentric screw rotor 2 as is rotatably arranged.
  • a comparative 1 and 2 it can be seen that the stator space 6 longitudinally running, partially cylindrical stator wall sections 7 having.
  • Fig. 2 shows a fitting game s between the Eccentric screw rotor 2 and the pump stator 5, through which allows wear-free operation of the two components becomes.
  • the radius R of the partially cylindrical stator wall sections 7 is out of the sum with this fit s Cross-sectional radius r of the eccentric screw rotor 2 and Eccentricity adjusted e, as can be seen in Fig. 2.
  • the Eccentricity e is 23% of the embodiment Eccentric screw rotor diameter. It can be seen that the Rotation axis 4 and the longitudinal axis 4 of the stator space 6 coincide and so far a central drive of the Eccentric screw rotor takes place.
  • Fig. 2 shows four Cavities 8 in the stator chamber 6. These run as shown in FIG. 1 shows in the longitudinal direction between the Stator wall sections 7. In the cavities 8 are elastic hoses 9 arranged. The one shown The worm pump has four channels. The funding mechanism is in 1 can be seen well.
  • the Sealing line between eccentric screw rotor 2 and hoses 9 runs in one of the pitch of the eccentric screw rotor 2 dependent angles to the longitudinal direction of the tubes 9.
  • the eccentric screw rotor 2 shown is catchy, it can but can also be easily carried out in multiple courses.
  • Hoses 9 are made of elastic rubber or plastic be made.
  • the pump stator 5 Use of an elastic material with a hardness of 90 Up to 95 Shore A advantageous for protecting the hoses. in the the rest of the chemical resistance of the Eccentric screw rotor and pump stator material only low requirements, so that inexpensive materials can be used.
  • Fig. 2 shows that the tubes 9th are distributed equidistantly around the circumference of the stator space.
  • two different items to be pumped be promoted, so it is beneficial to low pulsation Convey each pump good in pairs on the circumference of the stator chamber 6 opposite hoses 9 use.
  • the hoses 9 shown in Fig. 2 have the same diameter and promote the same Pump material flows. It is easy to see in Fig. 2 that the Diameter of the hoses can be changed easily can to increase the delivery rate of the individual hoses vary. In operation, the ratio of those in the Hoses 9 pumped material flows constant and from Total throughput or of speed and slope of the Eccentric screw rotor 2 be independent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Abstract

A worm pump has an eccentric worm rotor rotatable in a stator to compress tubes which thus carry respective flowable media so that these media are forced through the tubes. The tubes are received in recesses in the stator wall which preferably is composed of a rubber with a shore A hardness of 90 to 95.

Description

Die Erfindung betrifft eine Schneckenpumpe für fließfähiges Pumpgut, - mit angetriebenem und schraubenförmig gewundenem Exzenterschneckenrotor mit konstantem, kreisförmigen Querschnitt, dessen Mittelpunkt von der Rotationsachse des Exzenterschneckenrotors um einen Exzentrizitätsabstand beabstandet ist, mit einem Pumpenstator mit Statorraum, und mit im Statorraum längslaufenden, in diesen hineinragenden, elastischen Schläuchen, wobei

  • der Exzenterschneckenrotor im Statorraum drehbar angeordnet ist, wobei ferner
  • die Rotationsachse des Exzenterschneckenrotors und die Längsachse des Statorraums zusammenfallen, wobei weiter
  • die Schläuche durch die von der Rotationsachse fernsten Bereiche des Exzenterschneckenrotors abschnittsweise in Dichtbereichen komprimiert werden und zwischen den Dichtbereichen Förderräume aufweisen, und wobei
  • die Dichtbereiche und die Förderräume durch Rotation des Exzenterschneckenrotors in Förderrichtung längs der Schläuche verschoben werden.
The invention relates to a screw pump for flowable pump material, with a driven and helically wound eccentric screw rotor with a constant, circular cross-section, the center of which is spaced apart from the axis of rotation of the eccentric screw rotor by an eccentricity distance, with a pump stator with a stator space, and with those extending longitudinally in the stator space and projecting into it , elastic hoses, whereby
  • the eccentric screw rotor is rotatably arranged in the stator space, furthermore
  • the axis of rotation of the eccentric screw rotor and the longitudinal axis of the stator space coincide, with further
  • the tubes are compressed in sections by the regions of the eccentric screw rotor furthest from the axis of rotation in sealing regions and have conveying spaces between the sealing regions, and wherein
  • the sealing areas and the delivery spaces can be moved along the hoses by rotating the eccentric screw rotor in the delivery direction.

Eine Schneckenpumpe des eingangs beschriebenen Aufbaus ist durch die GB-A-2 029 514 bekannt geworden. Diese weist unter anderem einen über eine Antriebsachse angetriebenen schraubenförmig gewundenen Exzenterschneckenrotor mit konstantem kreisförmigen Querschnitt auf. Die in einem Statorraum längs verlaufenden elastischen Schläuche werden mittels endseitigen Platten durch den Statorraum geführt. Hierzu sind Öffnungen in den vorgenannten Platten vorgesehen. Ferner finden sich Zentralöffnungen, welche der Aufnahme einer Antriebs- bzw. Rotationsachse dienen. Um die Schläuche abschnittsweise in Dichtbereichen zu komprimieren und zwischen den Dichtbereichen Förderräume zu definieren, kommt es einzig und allein darauf an, das Spaltspiel bzw. Passungsspiel zwischen Exzenterschneckenrotor und Stator so einzustellen, daß dieses etwa der zweifachen Wanddicke der elastischen Schläuche entspricht. Folglich greifen an die Schläuche in Längsrichtung verlaufende Kräfte an, welche zu unvermeidbaren Beschädigungen führen können. Insbesondere lassen sich Dehnungen, die beispielsweise in Verbindung mit Alterungseffekten zum Reißen führen können, nicht ausschließen.A worm pump of the construction described above is made known by GB-A-2 029 514. This points including one driven by a drive axle helically wound eccentric screw rotor with constant circular cross section. The one in a stator room longitudinal elastic hoses are by means of end plates through the stator. For this purpose, openings are provided in the aforementioned plates. There are also central openings that accommodate the recording serve a drive or rotational axis. To the Compress hoses in sections in sealing areas and to define conveying spaces between the sealing areas, the only thing that matters is the gap play or Fit between eccentric screw rotor and stator like this adjust that this is about twice the wall thickness of the corresponds to elastic hoses. Consequently, attack the Hoses running in the longitudinal direction to which can lead to unavoidable damage. Especially can be stretched, for example in connection with Aging effects can lead to tearing, not to be excluded.

Im übrigen sind Schneckenpumpen mit Exzenterschneckenrotor beispielsweise aus Hartinger, "Taschenbuch der Abwasserbehandlung", Band 2, Carl Hanser Verlag, 1977, bekannt. Bei diesen Pumpen besitzt der Statorraum schraubenförmige Ausnehmungen mit doppelter Gangzahl und Steigung des Exzenterschneckenrotors. Rotationsachse des Exzenterschneckenrotors und Längsachse des Statorraums sind um die Exzentrizität des Exzenterschneckenrotors versetzt. Die bekannte Pumpe ist hinsichtlich der Pumpenstatorfertigung und hinsichtlich des Antriebes konstruktiv vergleichsweise aufwendig. Der Pumpenstator ist wegen des dichtenden Kontraktes zum Exzenterschneckenrotor verschleißanfällig. Das Pumpenstatormaterial und der Exzenterschneckenrotor-Werkstoff müssen hinsichtlich ihrer Beständigkeit an das zu fördernde Pumpgut angepaßt werden. Die bekannten Exzenterschneckenpumpen arbeiten einflutig, d.h., pro Rotor-Stator-Paarung kann nur ein Pumpgutstrom gefördert werden.Otherwise, there are screw pumps with eccentric screw rotors for example from Hartinger, "Paperback of Wastewater Treatment", Volume 2, Carl Hanser Verlag, 1977, known. At the stator chamber of these pumps has helical recesses with double number of gears and pitch of the eccentric screw rotor. Rotation axis of the eccentric screw rotor and the longitudinal axis of the stator space are about the eccentricity of the eccentric screw rotor. The well-known pump is regarding the pump stator manufacture and regarding the drive is comparatively complex. Of the Pump stator is due to the sealing contract to the eccentric screw rotor prone to wear. The pump stator material and the eccentric screw rotor material with regard to their resistance to the pumped material to be pumped be adjusted. The well-known progressing cavity pumps work single-flow, i.e., per rotor-stator pairing can only a flow of pumped goods are promoted.

Der Erfindung liegt das technische Problem zugrunde, eine Schneckenpumpe des eingangs beschriebenen Aufbaus hinsichtlich Beständigkeits- und Verschleißproblemen zu verbessern.The invention is based on the technical problem Worm pump of the construction described above with regard Improve resistance and wear problems.

Zur Lösung dieses technischen Problems lehrt die Erfindung bei einer gattungsgemäßen Schneckenpumpe für fließfähiges Pumpgut, daß der Statorraum längslaufende, teilzylindrische Statorwandabschnitte und zumindest zwei zwischen den Statorwandabschnitten längslaufende Auskammerungen für die hierin angeordneten elastischen Schläuche aufweist, und daß die Statorwandabschnitte einen mit Passungsspiel an die Summe aus Exzentrizitätsabstand und Querschnittsradius des Exzenterschneckenrotors angepaßten Radius besitzen.The invention teaches to solve this technical problem in a generic screw pump for flowable Pump material that the stator chamber is longitudinal, partially cylindrical Stator wall sections and at least two between the Stator wall sections longitudinal cavities for the has resilient hoses disposed therein, and that the stator wall sections with a clearance to the Sum of eccentricity distance and cross section radius of the Eccentric screw rotor adapted radius.

Die Erfindung geht von der Erkenntnis aus, daß sich trotz des offenen, schraubenförmigen Kanals zwischen Exzenterschneckenrotor und den teilzylindrischen Statorwandabschnitten eine Förderwirkung erzielen läßt, wenn der Statorraum zwischen den Statorwandabschnitten mit längslaufenden Auskammerungen und darin angeordneten Schläuchen versehen wird: Zwischen den längslaufenden Schläuchen und den schraubenförmig umlaufenden, von der Rotationsachse fernsten Bereichen des Exzenterschneckenrotors entstehen Schnittbereiche mit Dichtlinien, die zur Erzeugung von in Längsrichtung beabstandeten Dichtbereichen der Schläuche genutzt werden. Dichtbereiche und zwischen diesen eingeschlossene Förderräume werden durch Rotation des Exzenterschneckenrotors in Förderrichtung verschoben, so daß das Pumpgut gefördert wird. Durch die Verwendung mehrerer Schläuche ist die erfindungsgemäße Schneckenpumpe mehrflutig, das heißt zur gleichzeitigen Förderung mehrerer, voneinander unabhängiger Pumpgutströme geeignet. Insbesondere können verschiedene Pumpgüter gleichzeitig gefördert werden. Pumpenstator und Exzenterschneckenrotor arbeiten praktisch verschleißfrei und ohne Beständigkeitsprobleme, da sie durch die Schläuche voneinander und vom Pumpgut getrennt sind. Der Aufbau der erfindungsgemäßen Schneckenpumpe ist konstruktiv einfach.The invention is based on the knowledge that despite of the open, helical channel between the eccentric screw rotor and the partially cylindrical stator wall sections can achieve a promotional effect if the stator between the stator wall sections with longitudinal Cavities and hoses arranged in them is provided: between the longitudinal hoses and the helical circumferential areas of the Eccentric screw rotor creates cutting areas with Sealing lines used to generate lengthways spaced sealing areas of the hoses are used. Sealing areas and conveying spaces enclosed between them by rotating the eccentric screw rotor in the conveying direction moved so that the pumped material is conveyed. By the use of several hoses is the one according to the invention Auger pump multi-flow, that is, for simultaneous Promotion of several, independent pump material flows suitable. In particular, different pump goods be promoted at the same time. Pump stator and eccentric screw rotor work practically without wear and without Resistance problems as they pass through the hoses are separated from each other and from the pump material. The structure of the Screw pump according to the invention is structurally simple.

Die Föderung von Pumpgut mittels abschnittsweise komprimierter Schläuche ist grundsätzlich durch sogenannte Schlauchpumpen aus der Praxis bekannt (vgl. Ullmanns Encyklopädie der technischen Chemie, 1973, Band 3, Seite 169). Hierbei wird ein Schlauch durch mehrere, längs des Schlauches bewegte Verdrängungskörper wie Rollen oder Gleitschuhe komprimiert. Eine mehrflutige Anordnung erfordert eine Erhöhung der Anzahl dieser Verdrängungskörper und ist konstruktiv aufwendig. Darüber hinaus werden die Schläuche unter Verringerung ihrer Lebensdauer in Längsrichtung gedehnt. Die erfindungsgemäße Schneckenpumpe erzeugt demgegenüber keine Dehnung der Schläuche, da Reibungskräfte zwischen Rotor und Schlauch im wesentlichen nur in Umfangsrichtung des Exzenterschneckenrotors wirken. Darüber hinaus fördert die erfindungsgemäße Schneckenpumpe wegen des durch die Steigung des Exzenterschneckenrotors bedingten Winkels der Dichtlinien zur Förderrichtung und wegen der durch die Geometrie des Exzenterschneckenrotors bedingten allmählichen Freigabe des Förderraumes am Pumpenausgang besonders pulsationsarm.The pumping material is conveyed in sections compressed hoses is basically known as Peristaltic pumps known from practice (see Ullmanns Encyclopedia of Technical Chemistry, 1973, Volume 3, page 169). Here, a hose through several, along the Hose moving displacers such as rollers or Sliding shoes compressed. A multi-flow arrangement requires and is an increase in the number of these displacers constructively complex. In addition, the hoses while reducing their lifespan in the longitudinal direction stretched. The screw pump according to the invention produces on the other hand, no expansion of the hoses because of frictional forces between rotor and hose essentially only in the circumferential direction of the eccentric screw rotor act. Furthermore promotes the screw pump according to the invention because of the slope of the angle caused by the eccentric screw rotor the sealing lines to the conveying direction and because of the Eccentric screw rotor geometry was gradual Especially release of the pumping chamber at the pump outlet low pulsation.

Im Rahmen der Erfindung liegt es, den Exzenterschneckenrotor nicht nur mit einem, sondern mit mehreren Gängen zu versehen. Durch die bei gleichbleibender Pumpenstatorlänge vergrößerte Zahl von Dichtbereichen läßt sich so die Dichtigkeit der Schneckenpumpe und der erzielbare Druck erhöhen. Der Pumpenstator der erfindungsgemäßen Schneckenpumpe kann grundsätzlich aus beliebigem Werkstoff gefertigt werden. Zur Schonung der Schläuche hat sich die Verwendung eines elastischen Materials mit einer Härte zwischen 90 und 95 Shore A besonders bewährt. Hinsichtlich eines gleichmäßigen und pulsationsarmen Laufes der Schneckenpumpe ist es von Vorteil, Auskammerungen und Schläuche äquidistant auf dem Umfang des Statorraumes zu verteilen. Bei einer weiteren bevorzugten Ausführungsform liegen zur Förderung des gleichen Pumpgutes dienende Schläuche einander jeweils paarweise auf dem Umfang des Statorraumes gegenüber, so daß bei einer späteren Zusammenführung der Ströme gleichen Pumpgutes keine Pulsation auftritt. Eine weitere bevorzugte Ausführungsform sieht vor, daß in den Auskammerungen Schläuche unterschiedlichen Durchmessers aufnehmbar sind. Hierdurch können in den einzelnen Schläuchen unterschiedliche Mengen von Pumpgut gefördert werden. Das Verhältnis der geförderten Mengen ist dabei von Drehzahl und Steigung des Exzenterschneckenrotors und somit von der Gesamtfördermenge unabhängig, so daß die erfindungsgemäße Vorrichtung insbesondere für Dosier- und Mischaufgaben eingesetzt werden kann, wobei die Regelung verschiedener Einzelpumpen bei Änderung der Gesamtfördermenge entfällt. Es versteht sich, daß hierzu die Auskammerungen in ihrer Tiefe und Breite an die verschiedenen Schlauchdurchmesser angepaßt werden können. Im allgemeinen ist dies jedoch nicht erforderlich, sofern die Wandstärke der Schläuche unterschiedlichen Durchmessers im wesentlichen übereinstimmt. Es versteht sich weiter, daß die Summe aus Tiefe der Auskammerung und Passungsspiel an die doppelte Wandstärke des in der Auskammerung angeordneten Schlauches angepaßt ist.It is within the scope of the invention, the eccentric screw rotor not only with one, but with several gears. Due to the increase in the length of the pump stator Number of sealing areas can be the tightness of the Increase the screw pump and the achievable pressure. Of the Pump stator of the screw pump according to the invention can are basically made of any material. For The use of a has been gentle on the hoses elastic material with a hardness between 90 and 95 Shore A especially proven. Regarding an even and low pulsation running of the screw pump, it is from Advantage, cavities and hoses equidistant on the Distribute the circumference of the stator space. Another preferred embodiment lie to promote the same Hoses serving the goods to be pumped on each other in pairs opposite the circumference of the stator space, so that at one later merging of the streams does not equal pumped goods Pulsation occurs. Another preferred embodiment provides for hoses in the cavities different diameters are recordable. Hereby different amounts in the individual tubes are funded by Pumpgut. The ratio of the funded The quantity depends on the speed and gradient of the eccentric screw rotor and thus the total output independently, so that the device according to the invention be used especially for dosing and mixing tasks can, with the control of various individual pumps There is no change in the total output. It goes without saying that the depths and breadth of the cavities the different hose diameters can be adjusted. In general, however, this is not necessary if the Wall thickness of the hoses of different diameters in the essentially coincides. It is further understood that the Sum of the depth of the recess and fit clearance to the double the wall thickness of the arranged in the chamber Hose is adjusted.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlicher Erläutert. Es zeigen in schematischer Darstellung

Fig. 1
einen Längsschnitt durch Exzenterschneckenrotor, Pumpenstator und Schläuche der erfindungsgemäßen Schneckenpumpe,
Fig. 2
einen Schnitt durch den Gegenstand der Fig. 1 aus der in Fig. 1 eingezeichneten Blickrichtung A-A.
In the following, the invention is explained in more detail with reference to a drawing representing only one exemplary embodiment. They show a schematic representation
Fig. 1
2 shows a longitudinal section through the eccentric screw rotor, pump stator and hoses of the screw pump according to the invention,
Fig. 2
a section through the object of FIG. 1 from the viewing direction AA shown in Fig. 1.

Die in den Figuren gezeigte Vorrichtung dient als Schneckenpumpe für fließfähiges Pumpgut. Die insoweit erforderlichen Aggregate für Antrieb, Lagerung des Exzenterschneckenrotors sowie für Zu- und Abfuhr des Pumpgutes wurden zur besseren Übersichtlichkeit nicht dargestellt. The device shown in the figures serves as a screw pump for flowable pump material. The necessary ones Units for drive, storage of the eccentric screw rotor as well as for the supply and removal of the pumped goods have been improved Clarity not shown.

Zum grundsätzlichen Aufbau der Schneckenpumpen 1 gehört ein schraubenförmiger, angetriebener Exzenterschneckenrotor 2. Fig. 1 zeigt schraffiert den kreisförmigen Querschnitt des Exzenterschneckenrotors. Der Mittelpunkt 3 des Exzenterschneckenrotors weist zu der Rotationsachse 4 einen Exzentrizitätsabstand e auf. Erkennbar ist weiterhin der Pumpenstator 5, der im Ausführungsbeispiel aus NBR-Kautschuk gefertigt sein mag. Der Pumpenstator 5 umfaßt einen Statorraum 6, in dem der Exzenterschneckenrotor 2 wie eingezeichnet drehbar angeordnet ist. Einer vergleichenden Betrachtung der Fig. 1 und 2 entnimmt man, daß der Statorraum 6 längslaufende, teilzylindrische Statorwandabschnitte 7 aufweist. Fig. 2 zeigt ein Passungspiel s zwischem dem Exzenterschneckenrotor 2 und dem Pumpenstator 5, durch das ein verschleißfreier Betrieb der beiden Bauteile ermöglicht wird. Der Radius R der teilzylindrischen Statorwandabschnitte 7 ist mit diesem Passungspiel s an die Summe aus Querschnittsradius r des Exzenterschneckenrotors 2 und Exzentrizität e angpaßt, wie Fig. 2 zu entnehmen ist. Die Exzentrizität e beträgt im Ausführungsbeispiel 23% des Exzenterschneckenrotor-Durchmessers. Man erkennt, daß die Rotationsachse 4 und die Längsachse 4 des Statorraumes 6 zusammenfallen und insoweit ein zentrischer Antrieb des Exzenterschneckenrotors erfolgt. Fig. 2 zeigt vier Auskammerungen 8 im Statorraum 6. Diese verlaufen, wie Fig. 1 erkennen läßt, in Längsrichtung zwischen den Statorwandabschnitten 7. In den Auskammerungen 8 sind elastische Schläuche 9 angeordnet. Die gezeigte Schneckenpumpe ist vierflutig. Der Fördermechanismus ist in Fig. 1 gut zu erkennen. Die der Rotationsachse 4 fernsten Bereiche des Exzenterschneckenrotors laufen schraubenförmig um und sind als Linie auf dem Rotor 2 angedeutet. Man erkennt, daß im Schnitt dieser Bereiche mit den in Längsrichtung verlaufenden Schläuchen 9 abschnittsweise Dichtbereiche 10 gebildet werden, in denen die Schläuche 9 komprimiert werden. Fig. 1 zeigt, daß die Schläuche 9 zwischen den Dichtbereichen 10 Förderräume 11 aufweisen. Man erkennt, daß durch Rotation des Exzenterschneckenrotors 2 Förderräume 11 und Dichtbereiche 10 längs der Schläuche 9 verschoben werden, wodurch das in den Förderräumen 11 eingeschlossene Volumen in Förderrichtung gefördert wird. Die Förderrichtung ist in Fig. 1 als Pfeil gekennzeichnet. Die Dichtlinie zwischen Exzenterschneckenrotor 2 und Schläuchen 9 verläuft in einem von der Steigung des Exzenterschneckenrotors 2 abhängigen Winkel zur Längsrichtung der Schläuche 9. Der gezeigte Exzenterschneckenrotor 2 ist eingängig, er kann aber auch ohne weiteres mehrgängig ausgeführt sein. Der Exzenterschneckenrotor 2 wird regelmäßig aus Stahl, die Schläuche 9 werden aus elastischem Gummi oder Kunststoff gefertigt sein. Hinsichtlich des Pumpenstators 5 ist die Verwendung eines elastischen Materials mit einer Härte von 90 bis 95 Shore A für die Schonung der Schläuche vorteilhaft. Im übrigen werden an die chemische Beständigkeit des Exzenterschneckenrotor- und des Pumpenstatorwerkstoffes nur geringe Anforderungen gestellt, so daß preiswerte Materialien verwendet werden können. Fig. 2 zeigt, daß die Schläuche 9 äquidistant auf dem Umfang des Statorraumes verteilt sind. Sollen im Ausführungsbeispiel zwei verschiedene Pumpgüter gefördert werden, so ist es vorteilhaft, zur pulsationsarmen Förderung jedes Pumpgutes einander paarweise auf dem Umfang des Statorraumes 6 gegenüberliegende Schläuche 9 zu verwenden. Die in Fig. 2 gezeigten Schläuche 9 haben den gleichen Durchmesser und fördern insofern gleiche Pumpgutströme. Man erkennt unschwer in Fig. 2, daß die Durchmesser der Schläuche ohne weiteres verändert werden können, um die Förderleistung der einzelnen Schläuche zu variieren. Im Betrieb wird hierbei das Verhältnis der in den Schläuchen 9 geförderten Pumpgutströme konstant und vom Gesamtdurchsatz bzw. von Drehzahl und Steigung des Exzenterschneckenrotors 2 unabhängig sein.A part of the basic structure of the screw pumps 1 helical, driven eccentric screw rotor 2. Fig. 1 shows hatched the circular cross section of the Eccentric screw rotor. The center 3 of the eccentric screw rotor points to the axis of rotation 4 Eccentricity distance e on. The is still recognizable Pump stator 5, which in the exemplary embodiment is made of NBR rubber may be made. The pump stator 5 includes one Stator chamber 6, in which the eccentric screw rotor 2 as is rotatably arranged. A comparative 1 and 2, it can be seen that the stator space 6 longitudinally running, partially cylindrical stator wall sections 7 having. Fig. 2 shows a fitting game s between the Eccentric screw rotor 2 and the pump stator 5, through which allows wear-free operation of the two components becomes. The radius R of the partially cylindrical stator wall sections 7 is out of the sum with this fit s Cross-sectional radius r of the eccentric screw rotor 2 and Eccentricity adjusted e, as can be seen in Fig. 2. The Eccentricity e is 23% of the embodiment Eccentric screw rotor diameter. It can be seen that the Rotation axis 4 and the longitudinal axis 4 of the stator space 6 coincide and so far a central drive of the Eccentric screw rotor takes place. Fig. 2 shows four Cavities 8 in the stator chamber 6. These run as shown in FIG. 1 shows in the longitudinal direction between the Stator wall sections 7. In the cavities 8 are elastic hoses 9 arranged. The one shown The worm pump has four channels. The funding mechanism is in 1 can be seen well. The most distant from the axis of rotation 4 Areas of the eccentric screw rotor run helically around and are indicated as a line on the rotor 2. Man recognizes that in the intersection of these areas with the in Sections 9 running in the longitudinal direction Sealing areas 10 are formed in which the hoses 9 be compressed. Fig. 1 shows that the hoses 9th have 10 delivery spaces 11 between the sealing areas. Man recognizes that by rotating the eccentric screw rotor 2 Delivery spaces 11 and sealing areas 10 along the tubes 9 are shifted, which in the delivery rooms 11th enclosed volume is conveyed in the direction of conveyance. The The direction of conveyance is marked as an arrow in FIG. 1. The Sealing line between eccentric screw rotor 2 and hoses 9 runs in one of the pitch of the eccentric screw rotor 2 dependent angles to the longitudinal direction of the tubes 9. The eccentric screw rotor 2 shown is catchy, it can but can also be easily carried out in multiple courses. Of the Eccentric screw rotor 2 is made of steel regularly Hoses 9 are made of elastic rubber or plastic be made. With regard to the pump stator 5 Use of an elastic material with a hardness of 90 Up to 95 Shore A advantageous for protecting the hoses. in the the rest of the chemical resistance of the Eccentric screw rotor and pump stator material only low requirements, so that inexpensive materials can be used. Fig. 2 shows that the tubes 9th are distributed equidistantly around the circumference of the stator space. In the exemplary embodiment, two different items to be pumped be promoted, so it is beneficial to low pulsation Convey each pump good in pairs on the circumference of the stator chamber 6 opposite hoses 9 use. The hoses 9 shown in Fig. 2 have the same diameter and promote the same Pump material flows. It is easy to see in Fig. 2 that the Diameter of the hoses can be changed easily can to increase the delivery rate of the individual hoses vary. In operation, the ratio of those in the Hoses 9 pumped material flows constant and from Total throughput or of speed and slope of the Eccentric screw rotor 2 be independent.

Claims (6)

  1. A spiral pump (1) for free-flowing pumping material,
    having a driven, helically wound eccentric spiral rotor (2) which has a constant, circular cross-section, the centre (3) of which is spaced apart from the axis of rotation (4) of the eccentric spiral rotor (2) by an eccentricity interval (e),
    having a pump stator (5) with a stator space (6) , and
    having flexible hoses (9) which run longitudinally in the stator space (6) and which protrude into the latter, wherein
    the eccentric spiral rotor (2) is rotatably disposed in the stator space (6), wherein in addition
    the axis of rotation (4) of the eccentric spiral rotor (2) and the longitudinal axis (4) of the stator space (6) coincide, wherein in addition
    the hoses (9) are compressed sectionally in compaction regions (10) by the regions of the eccentric spiral rotor (2) which are furthest from the axis of rotation (4) and comprise conveying spaces (11) between the compaction regions (10), and wherein
    the compaction regions (10) and the conveying spaces (11) are displaced along the hoses (9) in the direction of conveying by the rotation of the eccentric spiral rotor (2),
    characterised in that
    the stator space (6) comprises longitudinally extending, partially cylindrical wall sections (7) and at least two chamber-like recesses (8), which extend longitudinally between the stator wall sections (7), for the flexible hoses (9) disposed therein, and that
    the stator wall sections (7) have a radius (R) which is matched with a fitting clearance (s) to the sum of the eccentricity interval (e) and the cross-sectional radius (r) of the eccentric spiral rotor (2).
  2. A spiral pump according to claim 1, characterised in that the eccentric spiral rotor is multiple-threaded.
  3. A spiral pump according to claims 1 or 2, characterised in that the pump stator (5) is manufactured from a flexible material with a hardness between 90 and 95 Shore A.
  4. A spiral pump according to any one of claims 1 to 3, characterised in that the chamber-like recesses (8) are disposed equidistantly on the periphery of the stator space (6).
  5. A spiral pump according to any one of claims 1 to 4, characterised in that hoses (9) which are acted upon by the same pumping material are disposed opposite each other in pairs on the periphery of the stator space (6).
  6. A spiral pump according to any one of claims 1 to 5, characterised in that hoses (9) of different diameters can be accommodated in the chamber-like recesses (8).
EP95120203A 1995-01-19 1995-12-20 Anger pump for conveying fluid material Expired - Lifetime EP0723081B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19501441 1995-01-19
DE19501441A DE19501441C1 (en) 1995-01-19 1995-01-19 Multi=flow eccentric screw pump

Publications (2)

Publication Number Publication Date
EP0723081A1 EP0723081A1 (en) 1996-07-24
EP0723081B1 true EP0723081B1 (en) 1999-02-03

Family

ID=7751802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120203A Expired - Lifetime EP0723081B1 (en) 1995-01-19 1995-12-20 Anger pump for conveying fluid material

Country Status (8)

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US (1) US5620313A (en)
EP (1) EP0723081B1 (en)
JP (1) JPH08319939A (en)
CN (1) CN1133944A (en)
AT (1) ATE176520T1 (en)
CA (1) CA2167545C (en)
DE (2) DE19501441C1 (en)
ES (1) ES2127460T3 (en)

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Also Published As

Publication number Publication date
EP0723081A1 (en) 1996-07-24
CA2167545A1 (en) 1996-07-20
CN1133944A (en) 1996-10-23
JPH08319939A (en) 1996-12-03
DE59505030D1 (en) 1999-03-18
DE19501441C1 (en) 1996-04-04
US5620313A (en) 1997-04-15
CA2167545C (en) 2000-10-03
ATE176520T1 (en) 1999-02-15
ES2127460T3 (en) 1999-04-16

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