EP0935072A1 - Eccentric screw pump - Google Patents

Eccentric screw pump Download PDF

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Publication number
EP0935072A1
EP0935072A1 EP99100672A EP99100672A EP0935072A1 EP 0935072 A1 EP0935072 A1 EP 0935072A1 EP 99100672 A EP99100672 A EP 99100672A EP 99100672 A EP99100672 A EP 99100672A EP 0935072 A1 EP0935072 A1 EP 0935072A1
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EP
European Patent Office
Prior art keywords
stator
lining
pump according
jacket
holder
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.)
Withdrawn
Application number
EP99100672A
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German (de)
French (fr)
Inventor
Sebastian Jäger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Artemis Kautschuk und Kunststoff Technik GmbH
Original Assignee
Artemis Kautschuk und Kunststoff Technik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Artemis Kautschuk und Kunststoff Technik GmbH filed Critical Artemis Kautschuk und Kunststoff Technik GmbH
Publication of EP0935072A1 publication Critical patent/EP0935072A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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 is based on an eccentric screw pump detachable with one between two brackets of the pump arranged stator, a rigid jacket and a enclosed by the rigid jacket, made of rubber or the like. existing, internally coiled lining from one Has elastomer, the brackets Have openings for the material to be conveyed.
  • the invention is based on the object at the outset Design the pumps mentioned so that with low Manufactured stators safely in the elastomer Eccentric screw pump mentioned at the beginning installed or expanded again and finally successful in one Pump can be operated.
  • the Brackets for receiving inside and in the same direction externally coiled stators and thus explained that at their ends e.g. one in essential elliptical contour stators in the brackets can be stored interchangeably.
  • Brackets - as usual with pipe flanges - with over holes distributed around their circumference be through which the tie rods are passed.
  • the stators can their ends should be designed so that their jacket and Close the lining flush or its end faces in lie on one level.
  • the brackets expediently with an essentially elliptical, circumferential projection or bead, which tightly encloses the stator end.
  • stator ends lying surfaces of the lining practically sales and pass into the inner surface of the bracket without a gap in order to not only a good seal, but also cheap to achieve fluidic requirements.
  • the elastomer stator consists essentially of one e.g. steel jacket 1 and one of the Sheath 1 enclosed lining 2 made of rubber or the like, which are attached to the inside of the jacket 1, but can also be loose.
  • single spiral rotor 3 serves a double spiral cavity 4, the outside of the lining 2 is limited.
  • Over the stator length away the coat 1 and the lining 2 have an essentially the same wall thickness. Accordingly, they are Lining 2 and the jacket 1 coiled in the same direction.
  • the conveying direction of the material to be conveyed is designated F; accordingly in Fig. 1 is the pressure side end of the pump shown.
  • the end faces are in the assembled state of the stator 7, 8 flat and at the same time metallic sealing, at least but practically gap-free on a contact surface 9 one Bracket 10, which corresponds to a stator size Has passage opening 11 for the material to be conveyed.
  • the jacket 1 is essentially free of play encircling bead 12 of the bracket 10 to Lateral movements of the stator relative to the bracket 10 to exclude.
  • the bracket 10 still has one at the free end flange-like connection 14 to there circular To be able to connect pressure lines.
  • the other The end of the stator is in a corresponding position Assigned a suction port.
  • the bracket shown is double for one coiled stator determined; should the stator be more Get coils, so the contact surface is 9th to execute accordingly.
  • the circumferential bead 12 can also be segmented and possibly even by individual protrusions e.g. by four Pins or warts to be replaced over the Stator circumference distributed adjacent to the tie rods 13 can be arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

The pump stator has a rigid jacket with elastomer lining, held between two holders (10). The holders are formed to accommodate stators, having internal and external uni-directional helix. The contact face (9) for a stator end on a holder is mainly elliptical. The end faces (7,8) of jacket (1) and lining (2) engage on a deformable seal on one of the holders. The contact faces for the stator end faces are enclosed by a pref. all-round projection (12), to prevent movement of the stator.

Description

Die Erfindung geht aus von einer Exzenterschneckenpumpe mit einem zwischen zwei Halterungen der Pumpe lösbar angeordneten Stator, der einen starren Mantel und eine von dem starren Mantel umschlossene, aus Gummi od. dgl. bestehende, innen gewendelte Auskleidung aus einem Elastomer aufweist, wobei die Halterungen Durchtrittsöffnungen für das Fördergut aufweisen.The invention is based on an eccentric screw pump detachable with one between two brackets of the pump arranged stator, a rigid jacket and a enclosed by the rigid jacket, made of rubber or the like. existing, internally coiled lining from one Has elastomer, the brackets Have openings for the material to be conveyed.

Bei den bekannten Statoren dieser Ausführung sind die beiden Halterungen zur Aufnahme des Stators flanschartig ausgeführt; sie stehen über Zuganker in Verbindung und weisen eine der runden Aussengestalt des Stators entsprechende Aufnahme für die Statorenden auf. In the known stators of this version two brackets for receiving the stator flange-like executed; they are connected via tie rods and exhibit one of the round outer shape of the stator appropriate recording for the stator ends.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs erwähnten Pumpen so auszubilden, dass mit geringem Elastomeraufwand gefertigte Statoren sicher in der eingangs erwähnten Exzenterschneckenpumpe eingebaut bzw. wieder ausgebaut und schliesslich erfolgreich in einer Pumpe betrieben werden können.The invention is based on the object at the outset Design the pumps mentioned so that with low Manufactured stators safely in the elastomer Eccentric screw pump mentioned at the beginning installed or expanded again and finally successful in one Pump can be operated.

Zur Lösung dieser Aufgabe sind erfindungsgemäss die Halterungen zur Aufnahme von gleichsinnig innen und aussen gewendelte Statoren ausgebildet und somit derart ausgeführt, dass die an ihren Enden z.B. eine im wesentlichen elliptische Kontur aufweisenden Statoren in den Halterungen auswechselbar gelagert werden können.To achieve this object, the Brackets for receiving inside and in the same direction externally coiled stators and thus explained that at their ends e.g. one in essential elliptical contour stators in the brackets can be stored interchangeably.

Um einen Stator zwischen den erwähnten Halterungen auswechselbar anordnen zu können, ist es zweckmässig, die beiden an den Statorenden befindlichen Halterungen durch lösbare Zuganker zu verbinden. Dazu können die Halterungen - wie bei Rohrflanschen üblich - mit über ihren Umfang verteilt angeordneten Löchern ausgestattet sein, durch die die Zuganker hindurchgeführt sind.To a stator between the mentioned brackets to be able to interchangeably arrange, it is appropriate to two brackets located on the stator ends to connect detachable tie rods. You can do that Brackets - as usual with pipe flanges - with over holes distributed around their circumference be through which the tie rods are passed.

In Verfolg des Erfindungsgedankens können die Statoren an ihren Enden so ausgebildet sein, dass deren Mantel und Auskleidung bündig abschliessen bzw. ihre Stirnflächen in einer Ebene liegen. Um dabei einen seitlichen Versatz der Statorenden auszuschliessen, werden die Halterungen zweckmässigerweise mit einem im wesentlichen elliptischen, umlaufenden Vorsprung oder Wulst versehen, der das Statorende eng umschliesst. In pursuit of the inventive idea, the stators can their ends should be designed so that their jacket and Close the lining flush or its end faces in lie on one level. To ensure a lateral offset of the To exclude stator ends, the brackets expediently with an essentially elliptical, circumferential projection or bead, which tightly encloses the stator end.

Wichtig ist ferner, dass an den Statorenden die innen liegenden Flächen der Auskleidung praktisch absatz- und spaltfrei in die Innenfläche der Halterung übergehen, um so nicht nur eine gute Abdichtung, sondern auch günstige strömungstechnische Voraussetzungen zu erreichen.It is also important that the inside of the stator ends lying surfaces of the lining practically sales and pass into the inner surface of the bracket without a gap in order to not only a good seal, but also cheap to achieve fluidic requirements.

Weitere Einzelheiten der Erfindugn werden anhand der Zeichnung erläutert, in der ein Ausführungsbeispiel der Erfindung dargestellt ist.Further details of the invention are based on the Drawing explained in which an embodiment of the Invention is shown.

Es zeigen :

  • Fig. 1 eine Einzelheit aus einer Exzenterschneckenpumpe im Längsschnitt, und zwar ein Statorende zusammen mit einer dieses Statorende aufnehmenden Halterung,
  • Fig. 2 einen Schnitt nach der Linie II - II von Fig. 1 und
  • Fig. 3 und 4 je ein Statorende im Teilquerschnitt.
    • Show it :
  • 1 shows a detail from an eccentric screw pump in longitudinal section, namely a stator end together with a holder receiving this stator end,
  • Fig. 2 shows a section along the line II - II of Fig. 1 and
  • 3 and 4 each have a stator end in partial cross section.

    • Der Elastomerstator besteht im wesentlichen aus einem z.B. aus Stahl bestehenden Mantel 1 und einer von dem Mantel 1 umschlossenen Auskleidung 2 aus Gummi od. dgl., die an der Innenseite des Mantels 1 angehaftet sind, aber auch lose anliegen kann. Zur Aufnahme des nur in Fig. 2 in Schraffur dargestellten, einfach gewendelten Rotors 3 dient ein doppelt gewendelter Hohlraum 4, der aussen von der Auskleidung 2 begrenzt ist. Über die Statorlänge hinweg haben der Mantel 1 und die Auskleidung 2 eine im wesentlichen gleiche Wandstärke. Demgemäs sind die Auskleidung 2 und der Mantel 1 gleichsinnig gewendelt. The elastomer stator consists essentially of one e.g. steel jacket 1 and one of the Sheath 1 enclosed lining 2 made of rubber or the like, which are attached to the inside of the jacket 1, but can also be loose. To accommodate the only in Fig. 2nd hatched, single spiral rotor 3 serves a double spiral cavity 4, the outside of the lining 2 is limited. Over the stator length away the coat 1 and the lining 2 have an essentially the same wall thickness. Accordingly, they are Lining 2 and the jacket 1 coiled in the same direction.

    Aufgrund der vorerwähnten Wendelung des Mantels 1 weist dieser in Übereinstimmung mit der Auskleidung 2 am Ende des Stators 1 gemäss Fig. 2 eine im wesentlichen elliptische bzw. eine Kontur auf, die im wesentlichen von einander gegenüberliegenden Halbkreisbögen 5 und sie verbindenden Geraden 6 bestimmt ist, wobei diese Kontur in bekannter Weise durch das Wesen einer Exzenterschneckenpumpe bestimmt ist.Due to the aforementioned winding of the jacket 1 points this in accordance with the liner 2 at the end of the stator 1 according to FIG. 2 is essentially one elliptical or a contour that is essentially of opposing semicircular arches 5 and them connecting straight line 6 is determined, this contour in a known manner by the nature of a Eccentric screw pump is determined.

    Im übrigen liegen an jedem Ende des Stators die Stirnflächen 7, 8 der Auskleidung und des Mantels 1 in einer Ebene, die senkrecht zur Längsmittelachse des Rotors verläuft.Incidentally, the are at each end of the stator End faces 7, 8 of the lining and the jacket 1 in a plane perpendicular to the longitudinal central axis of the Rotors runs.

    Die Förderrichtung des Fördergutes ist mit F bezeichnet; demgemäss ist in Fig. 1 das druckseitige Ende der Pumpe dargestellt.The conveying direction of the material to be conveyed is designated F; accordingly in Fig. 1 is the pressure side end of the pump shown.

    Im montierten Zustand des Stators liegen die Stirnflächen 7, 8 flächig und zugleich metallisch dichtend, zumindest aber praktisch spaltfrei an einer Anlagefläche 9 einer Halterung 10 an, die eine der Statorgrösse entsprechende Durchtrittsöffnung 11 für das Fördergut aufweist. Im wesentlichen spiel frei wird der Mantel 1 von einem umlaufenden Wulst 12 der Halterung 10 umschlossen, um Lateralbewegungen des Stators gegenüber der Halterung 10 auszuschliessen.The end faces are in the assembled state of the stator 7, 8 flat and at the same time metallic sealing, at least but practically gap-free on a contact surface 9 one Bracket 10, which corresponds to a stator size Has passage opening 11 for the material to be conveyed. in the The jacket 1 is essentially free of play encircling bead 12 of the bracket 10 to Lateral movements of the stator relative to the bracket 10 to exclude.

    Wichtig ist nun, dass die Anlagefläche 9 und auch der Wulst 12 bezüglich ihres Verlaufs der Kontur des Mantels 1 entsprechen, also ebenfalls die vorerwähnte etwa elliptische Gestaltung des Mantels 1 und der Auskleidung 2 erhalten haben. Demgemäss ist es möglich, von Statorkörpern grösserer Längenerstreckung gewünschte Längenabschnitte abzutrennen und diese unmittelbar in Pumpen einzusetzen, deren Halterungen im Sinne der Erfindung gestaltet sind.It is now important that the contact surface 9 and the Bead 12 with respect to its course of the contour of the jacket 1 correspond, so also the above-mentioned approximately elliptical design of the jacket 1 and the lining Have received 2. Accordingly, it is possible from Stator bodies of greater length extension desired Detach lengths and immediately in Use pumps whose brackets in the sense of Invention are designed.

    Es versteht sich, dass die am saugseitigen Ende des Stators vorgesehene Halterung der Halterung 10 entsprechend auszuführen ist. Beide stehen indessen durch vier über den Statorumfang verteilte Zuganker 13 derart in Verbindung, dass der Stator ausreichend sicher zwischen ihnen gehalten werden kann.It is understood that the at the suction end of the Stator provided holder of the bracket 10 is to be carried out accordingly. Both survive four tie rods 13 distributed over the stator circumference in connection that the stator is sufficiently secure can be kept between them.

    Die Halterung 10 hat noch am freien Ende einen flanschartigen Anschluss 14, um dort kreisrunde Druckleitungen anschliessen zu können. Der am anderen Statorende befindlichen Halterung ist in entsprechender Weise ein Saugstutzen zugeordnet.The bracket 10 still has one at the free end flange-like connection 14 to there circular To be able to connect pressure lines. The other The end of the stator is in a corresponding position Assigned a suction port.

    Es sei noch erwähnt, dass im Bereich der Anlagefläche 9, insb. am äusseren Umfang im Bereich der Stirnfläche 7 in der Halterung eine oder mehrere Umfangsnuten zur Ausnhme von Dichtungsringen vorgesehen sein können, um ggfs. eine zusätzliche Dichtung zwischen dem Stator und der Halterung 10 bewirken zu können.It should also be mentioned that in the area of the contact surface 9, esp. on the outer circumference in the area of the end face 7 in the bracket one or more circumferential grooves for Ausnhme of sealing rings can be provided, if necessary additional seal between the stator and the To be able to effect holder 10.

    Auch sei darauf verwiesen, dass an den Statorenden die Innenfläche der Auskleidung 2 stufenlos und nach Möglichkeit auch spaltfrei in die Innenfläche der Halterung 10 übergehen soll, wie dies bei 15 gezeigt ist. Demgemäss soll die innere Kante 16 der Ahlagefläche 9 bündig mit der Innenfläche der Auskleidung 2 abschliessen.It should also be pointed out that the Inner surface of the lining 2 continuously and after Possibility also gap-free in the inner surface of the Bracket 10 should pass, as shown at 15. Accordingly, the inner edge 16 of the axle surface 9 flush with the inner surface of the lining 2 to lock.

    Die dargestellte Halterung ist für einen doppelt gewendelten Stator bestimmt; sollte der Stator weitere Wendelungen erhalten, so ist die Anlagefläche 9 entsprechend auszuführen.The bracket shown is double for one coiled stator determined; should the stator be more Get coils, so the contact surface is 9th to execute accordingly.

    Aus den Fig. 3 und 4 ist ersichtlich, dass die Stirnflächen 7, 8 gegeneinander versetzt sein können, wobei die Stirnfläche 8 bzw. die Auskleidung 2 geringfügig gegenüber der Stirnfläche 7 des Mantels 1 vorspringt, um durch elastische Verformung der Auskleidung 2 bei der Statormontage eine Abdichtung herbeiführen zu können. Aus Gründen einer noch besseren Abdichtung können - wie in Fig. 4 dargestellt - an der Auskleidung 2 stirnseitig noch eine, ggfs. mehrere umlaufende Rippen 17 vorgesehen werden.3 and 4 that the End faces 7, 8 can be offset from one another, the end face 8 or the lining 2 slightly opposite the face 7 of the jacket 1 protrudes to by elastic deformation of the Lining 2 a seal during stator assembly to be able to bring about. For the sake of an even better one Sealing can - as shown in Fig. 4 - on the Lining 2 on the face another, possibly several circumferential ribs 17 are provided.

    Der umlaufende Wulst 12 kann auch segmentiert sein und ggfs. sogar durch einzelne Vorsprünge z.B. durch vier Stifte oder Warzen ersetzt werden, die über den Statorumfang verteilt den Zugankern 13 benachbart angeordnet werden können.The circumferential bead 12 can also be segmented and possibly even by individual protrusions e.g. by four Pins or warts to be replaced over the Stator circumference distributed adjacent to the tie rods 13 can be arranged.

    Claims (10)

    Exzenterschneckenpumpe mit einem zwischen zwei Halterungen der Pumpe lösbar angeordneten Stator, der einen starren Mantel und eine von dem starren Mantel umschlossene, innen gewendelte Auskleidung aus einem Elastomer aufweist, wobei die Halterungen Durchtrittsöffnungen für das Fördergut aufweisen, dadurch gekennzeichnet, dass die Halterungen (10) zur Aufnahme von gleichsinnig innen und aussen gewendelten Statoren ausgebildet sind.Eccentric screw pump with one between two Mounts of the pump releasably arranged stator, the a rigid coat and one of the rigid coat enclosed, internally coiled lining from one Has elastomer, the brackets Have passage openings for the material to be conveyed, thereby characterized in that the brackets (10) for receiving stators wound in the same direction inside and outside are trained. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die an der Halterung (10) befindliche Anlagefläche (9) für die Statorenden im wesentlichen elliptisch geformt ist.Pump according to claim 1, characterized in that the contact surface (9) located on the holder (10) shaped essentially elliptical for the stator ends is. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Stirnflächen (7,8) des Mantels (1) und der Auskleidung (2) in einer vorzugsweise achsnormalen Ebene liegen.Pump according to claim 1, characterized in that the end faces (7,8) of the jacket (1) and Lining (2) in a plane that is preferably normal to the axis lie. Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Stirnflächen (7,8) - vorzugsweise die Stirnfläche des Mantels (1) - an einer an der Halterung (10) angeordneten, verformbaren Dichtung anliegen.Pump according to claim 3, characterized in that the end faces (7,8) - preferably the end face of the Jacket (1) - on one on the bracket (10) arranged, deformable seal. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die für die Stirnflächen (7,8) des Stators vorgesehenen Anlageflächen (9) der Halterung (10) von einem vorzugsweise umlaufenden, ggfs. aber auch segmentierten, wulstartigen, einen seitlichen Versatz des Stators verhindernden Vorsprung (12) an der Halterung (10) umschlossen sind.Pump according to claim 1, characterized in that provided for the end faces (7,8) of the stator Contact surfaces (9) of the holder (10) from one preferably circumferential, but possibly also segmented, bead-like, a lateral offset of the stator preventing projection (12) on the holder (10) are enclosed. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Innenseite der Auskleidung (2) praktisch stufenfrei und vorzugsweise auch spaltfrei in die benachbarte Innenfläche der Halterung (10) übergeht ( Kante 16 ).Pump according to claim 1, characterized in that the inside of the lining (2) practically stepless and preferably also gap-free into the neighboring one Inner surface of the bracket (10) merges (edge 16). Pumpe nach Anspruch 1, dadurch gekennzeichnet, dadurch gekennzeichnet, dass auserhalb der Anlageflächen (9) der Halterung (10) für die Stirnflächen (7,8) des Stators mehrere Vorpsrünge an der Halterung (10) vorgesehen sind, die einen seitlichen Versatz des Stators verhindern.Pump according to claim 1, characterized in that characterized in that the outside of the contact surfaces (9) Bracket (10) for the end faces (7,8) of the stator several projections are provided on the holder (10), which prevent the stator from lateral displacement. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass an den Statorenden die Auskleidung (2) gegenüber dem Mantel (1) bzw. dessen Stirnfläche (7) vorspringt.Pump according to claim 1, characterized in that the stator ends the lining (2) opposite the jacket (1) or its end face (7) protrudes. Pumpe nach Anspruch 8, dadurch gekennzeichnet, dass die Auskleidung (2) ggfs. auf ihrem Vorsprung mit einer oder mehreren umlaufenden, der Abdichtung dienenden Rippen (17) versehen ist.Pump according to claim 8, characterized in that if necessary, the lining (2) on its projection with a or several circumferential, the sealing serving Ribs (17) is provided. Stator für Exzenterschneckenpumpen mit den Merkmalen nach einem oder mehreren vorhergehenden Ansprüchen.Stator for progressing cavity pumps with the features according to one or more of the preceding claims.
    EP99100672A 1998-02-04 1999-01-15 Eccentric screw pump Withdrawn EP0935072A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19804258 1998-02-04
    DE1998104258 DE19804258A1 (en) 1998-02-04 1998-02-04 Eccentric screw pump

    Publications (1)

    Publication Number Publication Date
    EP0935072A1 true EP0935072A1 (en) 1999-08-11

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    ID=7856547

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99100672A Withdrawn EP0935072A1 (en) 1998-02-04 1999-01-15 Eccentric screw pump

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    EP (1) EP0935072A1 (en)
    DE (1) DE19804258A1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2001029422A1 (en) * 1999-10-18 2001-04-26 Wilhelm Kächele GmbH Elastomertechnik Stator with rigid retaining ring
    US11326594B2 (en) * 2018-05-23 2022-05-10 Pcm Technologies Stator element of a progressive cavity pump and progressive cavity pump
    CN116201728A (en) * 2022-12-22 2023-06-02 华创机器人制造有限公司 Special screw pump for submersible screw pump oil extraction machine and manufacturing method

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102004038477B3 (en) * 2004-08-07 2005-10-06 Netzsch-Mohnopumpen Gmbh Cavity Pump

    Citations (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2937403A1 (en) * 1979-09-15 1981-04-02 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Stator for eccentric-screw pump - comprises rubber or elastomer moulding with integral seals which overlap housing ends
    DE3410306A1 (en) * 1984-03-21 1985-10-03 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Eccentric worm screw pump

    Patent Citations (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2937403A1 (en) * 1979-09-15 1981-04-02 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Stator for eccentric-screw pump - comprises rubber or elastomer moulding with integral seals which overlap housing ends
    DE3410306A1 (en) * 1984-03-21 1985-10-03 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Eccentric worm screw pump

    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    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
    US11326594B2 (en) * 2018-05-23 2022-05-10 Pcm Technologies Stator element of a progressive cavity pump and progressive cavity pump
    CN116201728A (en) * 2022-12-22 2023-06-02 华创机器人制造有限公司 Special screw pump for submersible screw pump oil extraction machine and manufacturing method
    CN116201728B (en) * 2022-12-22 2024-02-13 华创机器人制造有限公司 Special screw pump for submersible screw pump oil extraction machine and manufacturing method

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    Publication number Publication date
    DE19804258A1 (en) 1999-08-12

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