EP0935071A1 - Elastomeric stator for eccentric screw pumps - Google Patents

Elastomeric stator for eccentric screw pumps Download PDF

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Publication number
EP0935071A1
EP0935071A1 EP99100630A EP99100630A EP0935071A1 EP 0935071 A1 EP0935071 A1 EP 0935071A1 EP 99100630 A EP99100630 A EP 99100630A EP 99100630 A EP99100630 A EP 99100630A EP 0935071 A1 EP0935071 A1 EP 0935071A1
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EP
European Patent Office
Prior art keywords
stator
elastomer
jacket
connection
ring
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Granted
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EP99100630A
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German (de)
French (fr)
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EP0935071B1 (en
Inventor
Sebastian Jäger
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Artemis Kautschuk und Kunststoff Technik GmbH
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Artemis Kautschuk und Kunststoff Technik GmbH
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    • 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
    • F04C2/1073—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 is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member

Definitions

  • the invention relates to an elastomer stator for a Eccentric screw pump, the elastomer stator made of an elastomer, of a rigid jacket has enclosed lining which with a for Inclusion of a rotor serving two or more times coiled cavity is provided, and wherein the Ends of the stator connecting rings to unite with remaining parts of the eccentric screw pump.
  • the invention is based on the output, stators of type mentioned in the beginning so that they on the one hand about the advantages of an inside and outside coiled coat and on the other hand also for such pumps are suitable that have a circular Request connection to the stator ends.
  • connection rings at the ends of one of the Inner contour of the stator coiled accordingly Stator sheath with a practical over the length of the sheath even wall thickness attached the Connection rings on the inner edge of one of the inner contours of the Stator have at least an approximate course.
  • the invention is based on a stator jacket, which is the same over its circumference and length Has wall thickness and accordingly in a simple manner a cylindrical tube body by pressing from the inside can be manufactured here.
  • An editing of the End sections of this jacket training is not required, these can rather be the coils be shaped accordingly and accordingly when viewed its face is roughly the shape of an ellipse exhibit.
  • To use such a coat in general can he receives flange-like connection rings that from the geometric circular ring shape and in Deviation from this design in its inner scope or on the inner edge of the inner contour of the elastic lining accordingly at least approximately is elliptical.
  • the Stator jacket also with its face blunt on the Apply to the inside of the connection ring and there be attached, which is preferably by welding od. Like. Is achieved.
  • stator designed in this way can be used universally; he can therefore also used in such progressing cavity pumps be using the usual stators cylindrical outer surface must be equipped.
  • the stator according to the invention opens after another Proposal according to the invention the possibility Stator jacket bodies in longer lengths, and indeed to be manufactured with elastic lining inside, by shorter bodies of greater length Cut ends by a normal cut. These ends are then used directly as a jacket and in According to the invention equipped with the connection rings. Also already provided with elastic inner lining Workpieces obtained in the aforementioned sense can even through weld seams on her back with the Connection rings are firmly connected.
  • the elastomer stator consists essentially of one stare, e.g. steel jacket 1, one inside lying lining 2 enclosed by the jacket 1 Rubber or rubber-like plastics and on the Stator ends located connection rings 7, which also are made of steel.
  • the lining 2 is preferably firmly adhered to the Jacket 1 connected, but it can also only - under No binding agent - on the inside of the Coat 1 fit and thus only held positively be.
  • the lining has a continuous cavity 4 for receiving a rotor 5, which is only in Fig. 2 in Cross section is shown. To achieve a Pump effect, the rotor 5 is simply coiled Cavity 4, however, designed double coiled.
  • the lining 2 is a total has uniform wall thickness s and the jacket 1 inside and outside according to the contour of the cavity 4 is also coiled.
  • the jacket 1 also has a constant over the stator length Wall thickness M.
  • connection ring 7 which the Connection between the stator on the one hand and the Pump frame on the suction side or pressure side on the other hand.
  • the connecting ring 7 is cylindrical on the outer circumference designed; the inner edge 8 of the connecting ring 7, however, runs in the sense of the contour of the cavity 4 or in parallel and essentially describes an ellipse. Compared to edge 8, however, jumps Lining 2 radially inwards.
  • connection ring 7 Concentric to the outer circumferential surface of the Connection ring 7 is located on the outside of this ring an annular groove 9, which serves to receive an O-ring 10.
  • the stator shown is preferably between two flange-like parts of the Pump held; the outside diameter of these parts should thereby that of the two envisaged Correspond to connection rings 7, the 0-ring 10 deformed and creates a seal. If necessary. can he Connection ring 7 in the area of its outer circumference too with screw holes or similar connecting means be provided to as detachable a connection as possible to create the other parts of the pump.
  • the jacket 1 can already be equipped with the lining 2 by cutting to length from a body with a larger size Length extension can be obtained by sawing or the like. This coat 1 is then both ends with a Provide connection ring 7, which is attached through the outside Welds 12 is attached so as to be tight and firm connection between the jacket 1 and the two To create connection rings 7.
  • connection ring 7 on the inner circumference - as indicated at 11 - conical externally expanding is
  • connection ring 7 on one, but preferably also on provided at both ends of the stator.
  • Fig. 1 and 2 corresponds to the outside diameter of the Connecting ring 7 of the greatest amplitude of the jacket 1, So it does not protrude in the radial direction.
  • the weld seam 12 is also intended.
  • the connecting ring 7 is used for fastening a metal sleeve 14 in coaxial with the stator Arrangement at its rear end by a Weld 15 is connected to the connecting ring 7 and a screw thread 16 in the area of its front end inside, but possibly also outside.
  • This Connection thread can also be designed conically.
  • the Metal sleeve 14 also has an outside with the Connection ring 7 matching outer diameter and an inside diameter that is the largest Cross extention of the peripheral surface 13 is determined.
  • the subsequent attachment of the metal sleeve 14 with Thread has the advantage that the thread in a later incised element to be connected to the stator can be.
  • Connection ring 7 also causes the Connection ring 7 a favorable transition from the outside coiled stator jacket 1 to an outer cylindrical Connecting link.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Connection rings (7) are located at both ends of the stator. The rings are fabricated separately, and are fastened to the ends of a helical jacket (1), which corresponds to the inner contour of the stator. The jacket has even wall thickness over virtually all of its length. The inner faces of the rings are shaped to conform to the inner contour of the elastomer stator. Each ring has circumferential grooves (9) in the outside, to accommodate sealing rings (10).

Description

Die Erfindung betrifft einen Elastomerstator für eine Exzenterschneckenpumpe, wobei der Elastomerstator eine aus einem Elastomer bestehende, von einem starren Mantel umschlossene Auskleidung aufweist, die mit einem zur Aufnahme eines Rotors dienenden, zwei oder mehrfach gewendelten Hohlraum versehen ist, und wobei sich an den Enden des Stators Anschlussringe zur Vereinigung mit übrigen Teilen der Exzenterschneckenpumpe befinden.The invention relates to an elastomer stator for a Eccentric screw pump, the elastomer stator made of an elastomer, of a rigid jacket has enclosed lining which with a for Inclusion of a rotor serving two or more times coiled cavity is provided, and wherein the Ends of the stator connecting rings to unite with remaining parts of the eccentric screw pump.

Bei den bekannten Statoren dieser Ausbildung sind die Anschlussringe flanschartig als Kreisringe ausgeführt, um günstige Befestigungsmöglichkeiten an den angrenzenden Teilen der Exzenterschneckenpumpe z.B. am Pumpengestell zu schaffen. Die Verwendung dieser Kreisringe für Statoren, deren Mäntel über die Länge hinweg von gleicher Wandstärke sind und demgemäss aussen und innen gewendelt sind, ist nicht möglich, da sie einen ordnungsgemässen Anschluss des Stators an den übrigen Teilen der Pumpe nicht zustandekommen lassen. Aus diesem Grunde ist man gezwungen, den Mantel der letztgenannten Statoren an seinen Enden bleibend zu verformen, um ihm dort eine Zylindergestalt zu vermitteln. Es versteht sich, dass diese Verformung besondere Arbeitsgänge zur Folge hat.In the known stators of this training Connection rings flange-shaped as circular rings, um cheap attachment options to the adjacent Parts of the eccentric screw pump e.g. on the pump frame to accomplish. The use of these circular rings for Stators, their sheaths of the same length Wall thickness are and accordingly spiral outside and inside are not possible as they are a proper one Connection of the stator to the other parts of the pump do not let come. For this reason you are forced to cover the latter stators permanently deforming his ends to give him one there To convey cylinder shape. It goes without saying that this deformation results in special operations.

Der Erfindung liegt die Ausgabe zugrunde, Statoren der eingangs erwähnten Art so auszubilden, dass sie einerseits über die Vorteile eines innen und aussen gewendelten Mantels verfügen und andererseits auch für solche Pumpen geeignet sind, die einen kreisrunden Anschluss an den Statorenden verlangen.The invention is based on the output, stators of type mentioned in the beginning so that they on the one hand about the advantages of an inside and outside coiled coat and on the other hand also for such pumps are suitable that have a circular Request connection to the stator ends.

Zur Lösung dieser Aufgabe sind erfindungsgemäss die für sich hergestellten Anschlussringe an den Enden eines der Innenkontur des Stators entsprechend gewendelten Statormantels mit einer über die Mantellänge praktisch gleichmässigen Wandstärke befestigt, wobei die Anschlussringe am inneren Rand einen der Innenkontur des Stators zumindest angenäherten Verlauf aufweisen.To achieve this object, the for produced connection rings at the ends of one of the Inner contour of the stator coiled accordingly Stator sheath with a practical over the length of the sheath even wall thickness attached, the Connection rings on the inner edge of one of the inner contours of the Stator have at least an approximate course.

Demgemäss geht die Erfindung von einem Statormantel aus, der über seinen Umfang und seine Länge hinweg die gleiche Wandstärke aufweist und demgemäss in einfacher Weise aus einem zylindrischen Rohrkörper durch Verpressen von innen her gefertigt werden kann. Eine Bearbeitung der Endabschnitte dieser Mantelausbildung ist nicht erforderlich, diese können vielmehr den Wendeln entsprechend geformt sein und demgemäss bei Betrachtung ihrer Stirnseite in etwa die Gestalt einer Ellipse aufweisen. Um einen solchen Mantel allgemein nutzen zu können, erhält er flanschartige Anschlussringe, die von der geometrischen Kreisringform abweichen und in Abweichung von dieser Gestaltung an ihrem inneren Umfang bzw. am innen gelegenen Rand der Innenkontur der elastischen Auskleidung entsprechend zumindest in etwa elliptisch gestaltet ist. Aus diesenm Grunde kann der Statormantel auch mit seiner Stirnfläche stumpf an der Innenseite des Anschlussringes anliegen und dort befestigt sein, was vorzugsweise durch Schweissen od. dgl. erreicht wird.Accordingly, the invention is based on a stator jacket, which is the same over its circumference and length Has wall thickness and accordingly in a simple manner a cylindrical tube body by pressing from the inside can be manufactured here. An editing of the End sections of this jacket training is not required, these can rather be the coils be shaped accordingly and accordingly when viewed its face is roughly the shape of an ellipse exhibit. To use such a coat in general can, he receives flange-like connection rings that from the geometric circular ring shape and in Deviation from this design in its inner scope or on the inner edge of the inner contour of the elastic lining accordingly at least approximately is elliptical. For this reason the Stator jacket also with its face blunt on the Apply to the inside of the connection ring and there be attached, which is preferably by welding od. Like. Is achieved.

Der so ausgeführte Stator ist universell nutzbar; er kann daher auch bei solchen Exzenterschneckenpumpen eingesetzt werden, die an sich für die üblichen Statoren mit zylindrischer Aussenfläche ausgerüstet werden müssen.The stator designed in this way can be used universally; he can therefore also used in such progressing cavity pumps be using the usual stators cylindrical outer surface must be equipped.

Der erfindungsgemässe Stator eröffnet nach einem weiteren Vorschlag gemäss Erfindung die Möglichkeit, Statormantelkörper in grösseren Längen, und zwar sogar mit innen liegender elastischer Auskleidung zu fertigen, um von diesen Körpern grösserer Längenerstreckung kürzere Enden durch einen Normalschnitt abzutrennen. Diese Enden werden dann unmittelbar als Mantelkörper benutzt und im Sinne der Erfindung mit den Anschlussringen ausgestattet. Auch bereits mit elastischer Innenauskleidung versehene, im vorerwähnten Sinne gewonnene Werkstücke können sogar noch durch Schweissnähte auf ihrem Rücken mit den Anschlussringen fest verbunden werden.The stator according to the invention opens after another Proposal according to the invention the possibility Stator jacket bodies in longer lengths, and indeed to be manufactured with elastic lining inside, by shorter bodies of greater length Cut ends by a normal cut. These ends are then used directly as a jacket and in According to the invention equipped with the connection rings. Also already provided with elastic inner lining Workpieces obtained in the aforementioned sense can even through weld seams on her back with the Connection rings are firmly connected.

Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der Ausführungsbeispiele der Erfindung dargestellt sind. Further details of the invention are based on the Drawing explained in the embodiments of the Invention are shown.

Es zeigen :

  • Fig. 1 einen Endabschnitt eines Elastomerstators im Längsschnitt,
  • Fig. 2 den Stator gemäss Fig. 1 in Richtung des Pfeiles II gesehen und
  • Fig. 3 einen Endabschnitt eines abgewandelten Elastomerstators zusammen mit einem Verbindungselement im Längsschnitt.
    • Show it :
  • 1 shows an end section of an elastomer stator in longitudinal section,
  • Fig. 2 seen the stator of FIG. 1 in the direction of arrow II and
  • Fig. 3 shows an end portion of a modified elastomer stator together with a connecting element in longitudinal section.

    • Der Elastomerstator besteht im wesentlichen aus einem starren, z.B. aus Stahl gefertigten Mantel 1, einer innen liegenden, vom Mantel 1 umschlossenen Auskleidung 2 aus Gummi oder gummiähnlichen Kunststoffen und an den Statorenden befindlichen Anschlussringen 7, die ebenfalls aus Stahl gefertigt sind.The elastomer stator consists essentially of one stare, e.g. steel jacket 1, one inside lying lining 2 enclosed by the jacket 1 Rubber or rubber-like plastics and on the Stator ends located connection rings 7, which also are made of steel.

    Die Auskleidung 2 wird vorzugsweise festhaftend mit dem Mantel 1 verbunden, sie kann aber auch lediglich - unter Verzicht auf ein Bindemittel - an der Innenseite des Mantels 1 anliegen und somit nur formschlüssig gehalten sein. Die Auskleidung hat einen durchgehenden Hohlraum 4 zur Aufnahme eines Rotors 5, der nur in Fig. 2 im Querschnitt dargestellt ist. Zur Erzielung eines Pumpeffektes ist der Rotor 5 einfach gewendelt, der Hohlraum 4 hingegen doppelt gewendelt gestaltet. The lining 2 is preferably firmly adhered to the Jacket 1 connected, but it can also only - under No binding agent - on the inside of the Coat 1 fit and thus only held positively be. The lining has a continuous cavity 4 for receiving a rotor 5, which is only in Fig. 2 in Cross section is shown. To achieve a Pump effect, the rotor 5 is simply coiled Cavity 4, however, designed double coiled.

    Wichtig ist, dass die Auskleidung 2 insgesamt eine gleichmässige Wandstärke s aufweist und der Mantel 1 innen und aussen der Kontur des Hohlraumes 4 entsprechend ebenfalls gewendelt ist. Der Mantel 1 hat also ebenfalls über die Statorlänge hinweg eine gleichbleibende Wandstärke M.It is important that the lining 2 is a total has uniform wall thickness s and the jacket 1 inside and outside according to the contour of the cavity 4 is also coiled. The jacket 1 also has a constant over the stator length Wall thickness M.

    An der Stirnfläche 6 des Mantels 1 liegt ein aus Stahl od. dgl. bestehender Anschlussring 7 an, der die Verbindung zwischen dem Stator einerseits und dem Pumpengestell an der Saugseite bzw. Druckseite andererseits herstellen soll.On the end face 6 of the jacket 1 is a steel od. Like existing connection ring 7, which the Connection between the stator on the one hand and the Pump frame on the suction side or pressure side on the other hand.

    Am äusseren Umfang ist der Anschlussring 7 zylindrisch gestaltet; die innengelegene Kante 8 des Anschlussringes 7 verläuft jedoch im Sinne der Kontur des Hohlraumes 4 bzw. parallel dazu und beschreibt somit im wesentlichen eine Ellipse. Gegenüber der Kante 8 springt jedoch die Auskleidung 2 radial nach innen vor.The connecting ring 7 is cylindrical on the outer circumference designed; the inner edge 8 of the connecting ring 7, however, runs in the sense of the contour of the cavity 4 or in parallel and essentially describes an ellipse. Compared to edge 8, however, jumps Lining 2 radially inwards.

    Konzentrisch zur äusseren Umfangsfläche des Anschlussringes 7 befindet sich aussen an diesen Ring eine Ringnut 9, die zur Aufnahme eines O-Ringes 10 dient.Concentric to the outer circumferential surface of the Connection ring 7 is located on the outside of this ring an annular groove 9, which serves to receive an O-ring 10.

    Vorzugsweise wird der dargestellte Stator zwischen zwei flanschartigen, durch Zuganker verbundenen Teilen der Pumpe gehalten; der Aussendurchmesser dieser Teile sollte dabei demjenigen der beidendig vorgesehenen Anschlussringe 7 entsprechen, wobei der 0-Ring 10 verformt und eine Abdichtung herbeiführt. Ggfs. kann der Anschlussring 7 im Bereich seines äuseren Umfangs auch mit Schraublöchern oder ähnlichen Verbindungsmitteln versehen sein, um eine möglichst lösbare Verbindung zu den anderen Teilen der Pumpe zu schaffen.The stator shown is preferably between two flange-like parts of the Pump held; the outside diameter of these parts should thereby that of the two envisaged Correspond to connection rings 7, the 0-ring 10 deformed and creates a seal. If necessary. can he Connection ring 7 in the area of its outer circumference too with screw holes or similar connecting means be provided to as detachable a connection as possible to create the other parts of the pump.

    Der Mantel 1 -bereits mit der Auskleidung 2 ausgestattetkann durch Ablängen von einem Körper mit grösserer Längenerstreckung durch Absägen od. dgl. gewonnen werden. Dieser Mantel 1 wird dann beidendig mit einem Anschlussring 7 versehen, der durch aussen angebrachte Schweissnähte 12 befestigt wird, um so eine dichte und feste Verbindung zwischen dem Mantel 1 und den beiden Anschlussringen 7 zu schaffen.The jacket 1 can already be equipped with the lining 2 by cutting to length from a body with a larger size Length extension can be obtained by sawing or the like. This coat 1 is then both ends with a Provide connection ring 7, which is attached through the outside Welds 12 is attached so as to be tight and firm connection between the jacket 1 and the two To create connection rings 7.

    Aus strömungstechnischen Gründen kann der Anschlussring 7 am inneren Umfang - wie bei 11 angedeutet - sich konisch nach aussen hin erweiternd ausgeführt sein.For fluidic reasons, the connection ring 7 on the inner circumference - as indicated at 11 - conical externally expanding.

    Bei der Ausführungsform gemäss Fig. 3 ist ebenfalls ein Anschlussring 7 an einem, vorzugsweise aber ebenfalls an beiden Enden des Stators vorgesehen. Im Gegensatz zu Fig. 1 und 2 entpricht jedoch der Aussendurchmesser des Anschlussringes 7 der grössten Amplitude des Mantels 1, überragt diesen in radialer Richtung also nicht. Zudem ist die innere, in etwa elliptische Umfangfläche 13 des Anschlussringes 7 mit der Innenfläche 4' der Auskleidung 2 bündig. Ein Sprung oder Absatz sind also im Übergang nicht vorhanden. Die Schweissnaht 12 ist ebenfalls vorgesehen. 3 is also a Connection ring 7 on one, but preferably also on provided at both ends of the stator. In contrast to Fig. 1 and 2, however, corresponds to the outside diameter of the Connecting ring 7 of the greatest amplitude of the jacket 1, So it does not protrude in the radial direction. In addition is the inner, approximately elliptical peripheral surface 13 of the Connection ring 7 with the inner surface 4 'of the lining 2 flush. So a jump or paragraph are in transition unavailable. The weld seam 12 is also intended.

    Der Anschlussring 7 gemäss Fig. 3 dient zur Befstigung einer Metallhülse 14 in zum Stator gleichachsiger Anordnung, die an ihrem hinteren Ende durch eine Schweissnaht 15 mit dem Anschlussring 7 verbunden ist und im Bereich ihres vorderen Endes ein Schraubgewinde 16 innen, ggfs. aber auch aussen aufweist. Dieses Anschlussgewinde kann auch konisch gestaltet sein. Die Metallhülse 14 hat zudem einen aussen mit dem Anschlussring 7 übereinstimmenden Aussendurchmesser und einen Innendurchmesser, der durch die grösste Querersteckung der Umfangsfläche 13 bestimmt ist.The connecting ring 7 according to FIG. 3 is used for fastening a metal sleeve 14 in coaxial with the stator Arrangement at its rear end by a Weld 15 is connected to the connecting ring 7 and a screw thread 16 in the area of its front end inside, but possibly also outside. This Connection thread can also be designed conically. The Metal sleeve 14 also has an outside with the Connection ring 7 matching outer diameter and an inside diameter that is the largest Cross extention of the peripheral surface 13 is determined.

    Statoren gemäss Fig. 3 kommen vorwiegend für die Absenkung in Erdbohrungen z.B. bei der Erdölgewinnung in Betracht. Sie haben den Vorteil, dass an einem Ende des Stators die Saugarmaturen und am anderen Ende des Stators die das Antriebsgestänge aufnehmenden Rohre angeschraubt werden können. Die Erfindung ist jedoch nicht an diese Anwendung gebunden.3 mainly come for the Lowering in earth bores e.g. in oil production in Consideration. They have the advantage that at one end of the The suction fittings and at the other end of the stator screwed on the tubes receiving the drive linkage can be. However, the invention is not related to this Application bound.

    Die nachträgliche Anbringung der Metallhülse 14 mit Gewinde hat den Vorteil, dass das Gewinde in ein später mit dem Stator zu verbindendes Element eingeschnitten werden kann.The subsequent attachment of the metal sleeve 14 with Thread has the advantage that the thread in a later incised element to be connected to the stator can be.

    Auch bei der Ausführung gemäss Fig. 2 bewirkt der Anschlussring 7 einen günstigen Übergang von dem aussen gewendelten Statormantel 1 zu einem aussen zylindrischen Anschlussglied.2 also causes the Connection ring 7 a favorable transition from the outside coiled stator jacket 1 to an outer cylindrical Connecting link.

    Claims (12)

    Elastomerstator für eine Exzenterschneckenpumpe, wobei der Elastomerstator eine aus einem Elastomer bestehende, von einem starren Mantel umschlossene Auskleidung aufweist, die einen zwei- oder mehrfach gewendelten, zur Aufnahme eines Rotors dienenden Hohlraum umgibt, und wobei sich vorzugsweise an beiden Statorenden ein Anschlussring zur Vereinigung des Elastomerstators mit übrigen Teilen der Exzenterschneckenpumpe befindet, dadurch gekennzeichnet, dass die für sich hergestellten Anschlussringe (7) an den Enden eines der Innenkontur des Stators entsprechend gewendelten Mantels (1) mit einer über die Mantellänge praktisch gleichmässig grossen Wandstärke befestigt sind, wobei die Anschlussringe (7) am inneren Umfang einen der Innenkontur des Elastomerstators zumindest angenäherten Verlauf aufweisen.Elastomer stator for an eccentric screw pump, whereby the elastomer stator consists of an elastomer, lining surrounded by a rigid coat has a two or more coils, for Includes a rotor serving cavity, and preferably at both stator ends Connection ring to combine the elastomer stator with remaining parts of the eccentric screw pump, characterized in that the manufactured for itself Connection rings (7) at the ends of one of the inner contours of the Stator correspondingly coiled jacket (1) with a practically uniformly large over the jacket length Wall thickness are fixed, the connecting rings (7) on the inner circumference of the inner contour of the Elastomer stator at least approximate course exhibit. Stator nach Anspruch 1, dadurch gekennzeichnet, dass die Anschlussringe am äusseren Umfang zumindest in etwa kreisförmig gestaltet sind. Stator according to claim 1, characterized in that the connection rings on the outer circumference at least approximately are circular. Stator nach Anspruch 1, dadurch gekennzeichnet, dass sich an der Aussenseite der Anschlussringe (7) zwei oder mehrere Umfangnuten (9) zur Aufnahme eines Dichtungsrings 10) befinden.Stator according to claim 1, characterized in that on the outside of the connection rings (7) two or several circumferential grooves (9) for receiving a sealing ring 10). Stator nach Anspruch 1, dadurch gekennzeichnet, dass der Anschlussring (7) an seinem inneren Umfang im wesentlichen parallel zur Innenkontur des Elastomerstators verläuft.Stator according to claim 1, characterized in that the connecting ring (7) on its inner circumference in essentially parallel to the inner contour of the Elastomer stator runs. Verfahren zur Herstellung von Elastomerstatoren nach Anspruch 1, dadurch gekennzeichnet, dass der Statormantel durch Abtrennen von einem Mantelkörper grösserer Längenerstreckung gewonnen und dann mit den Anschlussringen versehen wird.Process for the production of elastomer stators Claim 1, characterized in that the stator jacket by removing larger from a jacket body Length extension won and then with the Connection rings is provided. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass der Statormantel von einem Mantelkörper abgetrennt wird, der mit einer Elastomerauskleidung versehen ist.A method according to claim 5, characterized in that the stator jacket is separated from a jacket body which is provided with an elastomer lining. Stator nach Anspruch 1, dadurch gekennzeichnet, dass der Anschlussring (7) am inneren Umfang sich nach aussen hin konisch erweiternd ausgebildet ist ( Bezugszeichen 11).Stator according to claim 1, characterized in that the connecting ring (7) on the inner circumference faces outwards is designed to expand conically (reference symbol 11). Stator nach Anspruch 1, dadurch gekennzeichnet, dass der Aussendurchmesser des Anschlussringes (7) praktisch durch die grösste Amplitude der Wendelung des Statormantels (1) bestimmt ist.Stator according to claim 1, characterized in that the outer diameter of the connecting ring (7) is practical by the greatest amplitude of the spiral of the Stator sheath (1) is determined. Stator nach Anspruch 1, dadurch gekennzeichnet, dass der Anschlussring (7) zum festen Anschluss ( Schweissnaht 15 ) von hohlzylindrischen Rohrabschnitten bzw. Hülsen dient, die koaxial zum Stator verlaufen und innen und/oder aussen mit Gewinde (16) versehen sein können.Stator according to claim 1, characterized in that the connection ring (7) for fixed connection (weld seam 15) of hollow cylindrical tube sections or sleeves serves that run coaxially to the stator and inside and / or outside can be provided with a thread (16). Stator nach Anspruch 8 und 9, dadurch gekennzeichnet, dass die zylindrischen Rohrabschnitte bzw. Hülsen (14) einen dem Anschlussring (7) entsprechenden Aussendurchmesser aufweisen.Stator according to claim 8 and 9, characterized in that the cylindrical pipe sections or sleeves (14) one corresponding to the connecting ring (7) Have outside diameter. Stator nach Anspruch 1, dadurch gekennzeichnet, dass die Innenfläche (4') der Auskleidung (2) praktisch absatzfrei in die innen gelegene Umfangsfläche (13) des Anschlussringes (7) übergeht.Stator according to claim 1, characterized in that the inner surface (4 ') of the lining (2) practical heel-free in the inner peripheral surface (13) of the Connection ring (7) passes over. Stator nach Anspruch 9, 10 und 11, dadurch gekennzeichnet, dass der Innendurchmesser der Rohrabschnitte bzw. Hülsen (14) durch den grössten Querabstand der Umfangsfläche (13) des Anschlussringes (7) bestimmt ist.Stator according to claim 9, 10 and 11, characterized characterized that the inside diameter of the Pipe sections or sleeves (14) through the largest Transverse distance of the peripheral surface (13) of the connecting ring (7) is determined.
    EP99100630A 1998-02-04 1999-01-14 Elastomeric stator for eccentric screw pumps Expired - Lifetime EP0935071B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19804260A DE19804260C2 (en) 1998-02-04 1998-02-04 Elastomer stator for an eccentric screw pump
    DE19804260 1998-02-04

    Publications (2)

    Publication Number Publication Date
    EP0935071A1 true EP0935071A1 (en) 1999-08-11
    EP0935071B1 EP0935071B1 (en) 2003-05-14

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    Application Number Title Priority Date Filing Date
    EP99100630A Expired - Lifetime EP0935071B1 (en) 1998-02-04 1999-01-14 Elastomeric stator for eccentric screw pumps

    Country Status (5)

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    EP (1) EP0935071B1 (en)
    AT (1) ATE240460T1 (en)
    CA (1) CA2260634C (en)
    DE (2) DE19804260C2 (en)
    ES (1) ES2199487T3 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2001029423A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kächele GmbH Eccentric screw pump with fully lined stator
    WO2001029422A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kächele GmbH Elastomertechnik Stator with rigid retaining ring
    US7329106B2 (en) * 2003-11-17 2008-02-12 Artemis Kautschuk-Und Kunststoff-Tecknik Gmbh Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2826407B1 (en) * 2001-06-21 2004-04-16 Pcm Pompes SPRAY PUMP STATOR AND PROCESS FOR ITS MANUFACTURE
    DE102005028818B3 (en) 2005-06-22 2006-08-24 Artemis Kautschuk- Und Kunststoff-Technik Gmbh Stator for an eccentric screw pump comprises axially arranged stator segments connected pressure-tight on their contact points by a tube pulled onto a casing and overlapping the contact points and a radially flattened metal ring
    EP3108142B1 (en) 2014-02-18 2017-11-15 Vert Rotors UK Limited Rotary positive-displacement machine

    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1592149A (en) * 1967-11-02 1970-05-11

    Family Cites Families (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1995353U (en) * 1965-12-31 1968-10-24 Max Streicher CLASSIFICATION AND PROTECTION DEVICE FOR ECCENTRIC SCREW PUMPS.

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR1592149A (en) * 1967-11-02 1970-05-11

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2001029423A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kächele GmbH Eccentric screw pump with fully lined stator
    WO2001029422A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kächele GmbH Elastomertechnik Stator with rigid retaining ring
    US6666668B1 (en) * 1999-10-18 2003-12-23 Wilhelm Kaechele Gmbh Elastomertechnik Stator with rigid retaining ring
    US7329106B2 (en) * 2003-11-17 2008-02-12 Artemis Kautschuk-Und Kunststoff-Tecknik Gmbh Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle

    Also Published As

    Publication number Publication date
    EP0935071B1 (en) 2003-05-14
    DE19804260A1 (en) 1999-08-12
    CA2260634C (en) 2008-07-15
    DE59905518D1 (en) 2003-06-18
    ES2199487T3 (en) 2004-02-16
    ATE240460T1 (en) 2003-05-15
    DE19804260C2 (en) 2003-04-10
    CA2260634A1 (en) 1999-08-04

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