EP0935071B1 - Elastomeric stator for eccentric screw pumps - Google Patents

Elastomeric stator for eccentric screw pumps Download PDF

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Publication number
EP0935071B1
EP0935071B1 EP99100630A EP99100630A EP0935071B1 EP 0935071 B1 EP0935071 B1 EP 0935071B1 EP 99100630 A EP99100630 A EP 99100630A EP 99100630 A EP99100630 A EP 99100630A EP 0935071 B1 EP0935071 B1 EP 0935071B1
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EP
European Patent Office
Prior art keywords
stator
connection
elastomeric
casing
connection ring
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Expired - Lifetime
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EP99100630A
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German (de)
French (fr)
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EP0935071A1 (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 has for its object stators 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 Require 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 or. 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 up 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 Separate ends with 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 adhered to the Sheath 1 connected, but it can also only - under No binding agent - on the inside of the Coat 1 fit and thus only held positively his.
  • 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 from a body with a larger size Length extension by sawing or the like can be obtained. 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 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 Connection hub.

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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 mounting options on 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 coiled 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 put on the mantle of 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.

Eine im wesentlichen derartige Ausführung der Stators einer Exzenterschneckenpumpe ist aus FR1592149A bekannt.An essentially such design of the stator Eccentric screw pump is known from FR1592149A.

Der Erfindung liegt die Aufgabe 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 has for its object stators 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 Require 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 solve this problem, according to the invention 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 or. 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 up 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 Separate ends with 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 adhered to the Sheath 1 connected, but it can also only - under No binding agent - on the inside of the Coat 1 fit and thus only held positively his. 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 from a body with a larger size Length extension by sawing or the like can be obtained. 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. moreover 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 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 Connection hub.

    Claims (12)

    1. Elastomeric stator for a Moineau pump, the elastomeric stator having a lining formed from an elastomeric material and surrounded by a rigid casing, said lining surrounding a hollow chamber which is spirally configured two or more times and serves to accommodate a rotor, and a connection ring being preferably situated at both stator ends for joining the elastomeric stator to the remaining parts of the Moineau pump, characterised in that the connection rings (7), produced per se, are secured to the ends of a casing (1), which is spirally configured to correspond to the internal contour of the stator and has a practically uniformly great wall thickness over the casing length, the connection rings (7) having, at the inner circumference, a configuration which at least approximates to the internal contour of the elastomeric stator.
    2. Stator according to claim 1, characterised in that the connection rings have at least a substantially circular configuration at the outer circumference.
    3. Stator according to claim 1, characterised in that there are two or more circumferential grooves (9) for accommodating a sealing ring (10) on the external side of the connection rings (7).
    4. Stator according to claim 1, characterised in that, at its inner circumference, the connection ring (7) extends substantially parallel to the internal contour of the elastomeric stator.
    5. Method of producing elastomeric stators according to claim 1, characterised in that the stator casing is obtained by separation from a casing body having a greater longitudinal extension and is then provided with the connection rings.
    6. Method according to claim 5, characterised in that the stator casing is separated from a casing body which is provided with an elastomeric lining.
    7. Stator according to claim 1, characterised in that the connection ring (7) has an outwardly conically widening configuration (11) at the inner circumference.
    8. Stator according to claim 1, characterised in that the external diameter of the connection ring (7) is practically determined by the greatest amplitude of the spiral configuration of the stator casing (1).
    9. Stator according to claim 1, characterised in that the connection ring (7) is used for the firm connection (15) of hollow-cylindrical tubular portions or respectively sleeves, which may extend coaxially relative to the stator and may be provided with thread (16) internally and/or externally.
    10. Stator according to claims 8 and 9, characterised in that the cylindrical tubular portions or respectively sleeves (14) have an external diameter corresponding to the connection ring (7).
    11. Stator according to claim 1, characterised in that the internal face (4') of the lining (2) passes, practically in a stepless manner, into the inner circumferential face (13) of the connection ring (7).
    12. Stator according to claims 9, 10 and 11, characterised in that the internal diameter of the tubular portions or respectively sleeves (14) is determined by the greatest transverse distance of the circumferential face (13) of the connection ring (7).
    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 EP0935071A1 (en) 1999-08-11
    EP0935071B1 true EP0935071B1 (en) 2003-05-14

    Family

    ID=7856549

    Family Applications (1)

    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)

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

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19950258A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kaechele Gmbh Elastome Eccentric worm pump or motor has stator with end ring with through opening of essentially similar shape to stator interior, threaded with same pitch and number of turns over ring thickness
    DE19950257B4 (en) * 1999-10-18 2013-01-17 Wilhelm Kächele GmbH Elastomertechnik Eccentric screw pump with fully lined stator
    FR2826407B1 (en) * 2001-06-21 2004-04-16 Pcm Pompes SPRAY PUMP STATOR AND PROCESS FOR ITS MANUFACTURE
    US7131827B2 (en) * 2003-11-17 2006-11-07 Artemis Kautschuk-Und Kunststoff-Technik Gmbh Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle
    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
    US10480506B2 (en) 2014-02-18 2019-11-19 Vert Rotors Uk Limited Conical screw machine with rotating inner and outer elements that are longitudinally fixed

    Family Cites Families (2)

    * 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.
    NL6815412A (en) * 1967-11-02 1969-05-06

    Also Published As

    Publication number Publication date
    ATE240460T1 (en) 2003-05-15
    DE19804260A1 (en) 1999-08-12
    ES2199487T3 (en) 2004-02-16
    CA2260634A1 (en) 1999-08-04
    CA2260634C (en) 2008-07-15
    EP0935071A1 (en) 1999-08-11
    DE59905518D1 (en) 2003-06-18
    DE19804260C2 (en) 2003-04-10

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