EP1400694A2 - Moineau-type pump with spare stator - Google Patents

Moineau-type pump with spare stator Download PDF

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Publication number
EP1400694A2
EP1400694A2 EP03020374A EP03020374A EP1400694A2 EP 1400694 A2 EP1400694 A2 EP 1400694A2 EP 03020374 A EP03020374 A EP 03020374A EP 03020374 A EP03020374 A EP 03020374A EP 1400694 A2 EP1400694 A2 EP 1400694A2
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EP
European Patent Office
Prior art keywords
stator
eccentric screw
screw pump
reserve
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03020374A
Other languages
German (de)
French (fr)
Other versions
EP1400694A3 (en
Inventor
Helmut Bauer
Christoph Boehnisch
Michael Groth
Guido Gutmann
Günther Hantschk
Siegfried Jarzina
Franz Kneidl
Johann Kreidl
Robert Kurz
Franz Lachenwitzer
Thomas Ribbe
Reinhard Denk
Michael Robby
Karl-Heinz Rosner
Thomas Jiu Shi Western Suburban Garden Streubel
Alfred Thumser
Matthias Gradl
Uwe Neumann
Hansjürgen Prof. Linde
Matthias Schaefer
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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 Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP1400694A2 publication Critical patent/EP1400694A2/en
Publication of EP1400694A3 publication Critical patent/EP1400694A3/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Withdrawn legal-status Critical Current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 relates to an eccentric screw pump for pumping liquid up pasty products that have a drive that is connected via a drive shaft with a Rotor is connected, a first stator and at least one further Reservestator are provided.
  • a corresponding arrangement of rotor and stator or replacement stator is shown in the DE 33 45 233 C2.
  • the eccentric screw pumps are located themselves at great depths of up to a few hundred meters. Since it is worn out of a stator would be very expensive to get the pump from this depth one or more replacement stators are provided, which are spaced apart are arranged. The riser fills the distance between the stators. If there is a deployment, the reserve statator (s) will be used for this Use the linkage lengthened or shortened.
  • a stator for an eccentric screw pump is known from DE 19 85 861 U, which is composed of two parts. The joints of the two parts are through sealed a sealing ring. The rotor extends over both stator parts.
  • the invention is therefore based on the task, the overall length and to reduce the mechanical expenditure of the pump when using reserve stators.
  • stator with the reserve stator is without Gaped together.
  • the two stator elements are advantageous placed in a stator housing and manufactured as one piece.
  • the switch to using the reserve stator is advantageously carried out in that the two stators in direct connection with each other 180 ° to its longitudinal axis, whereby the reserve stator in the Effective range of the rotor reaches.
  • the flexurally elastic shaft is required to compensate for those generated by the rotor Eccentricity due to its modulus of elasticity a certain length. Thereby, that the flexurally elastic wave beyond the pump housing also beyond the the stator part closest to the drive extends the overall length of the pump the length of the stator or reserve stator is reduced.
  • the stator can be one Intermediate tube can be supplemented.
  • This intermediate pipe can be used both on the direct suction-side connection of the stator after the pump housing can be arranged as also at the pressure side end of the stator in front of the outlet port. Because of the engagement this intermediate tube at the suction end of the stator is for the Bending elastic shaft maintain the required length, regardless of which Structeil is in use.
  • FIG. 1 shows an eccentric screw pump 10 of the Moineau type with a drive 12 and a gear 14, which is connected to a drive shaft 16 via a hollow shaft connected is.
  • the drive shaft 16 is provided with a seal 18 which Prevention of product in the area of storage 20 prevented.
  • the flexible shaft 22 and the drive shaft 16 are by a screw, Shrink or adhesive connection fixed in rotation with each other.
  • the pump housing 26 has an inlet connection 28 through which the product into the Eccentric screw pump 10 is sucked. By loosening the screw 30 and Opening the quick release device 32 allows the entire stator 38 to be opened simultaneously with the end piece 34, with the rotor 36, the flexible shaft 22, the Drive shaft 16 and the seal 18 as a unit from the pump housing 26 and Pull off drive 12 and replace it with a new exchange unit.
  • the stator itself consists of a deformable inner layer with at least one two-turn helix to accommodate the rotor and a rigid stator jacket.
  • the Stator 38 is made up of a working area 42 in which rotor 36 is located is located, and a reserve area 44 together. By reversing the stator 38 by 180 ° to the longitudinal axis of the eccentric screw pump 10 Reserve area 44 in connection with the rotor.
  • the intermediate tube 40 is between the pressure side End of the stator 38 and the end connector 34 to the portion of the stator 38 is currently involved in pump operation, is subject to a certain amount of wear. Is this wear and tear caused by decreasing pump pressure or similar? wear characteristics determined, the pump operation is stopped and the quick-release devices are released 32, puts the intermediate pipe 40 directly to the pump housing 26 and closes the Quick release device 32. Moved by moving the intermediate housing not the position of the rotor 36, but the position of the stator 38 and thus shifts the area in which the rotor with the stator 38 as a pump works together by half the total stator length.

Abstract

The screw pump has a drive (12) connected by drive shaft (16) to a rotor (36) and with a first stator (38) and at least one further reserve stator which adjoins the first stator without interspace so that the stator has a work region and a reserve region . The stator is moved to or fro to change over the regions. The stator and reserve stator are combined in one stator casing. Changing the engagement of the rotor from the used part of the stator to the reserve part is by turning the entire stator round 180 degrees relative to its longitudinal axis.

Description

Die Erfindung betrifft eine Exzenterschneckenpumpe zur Förderung flüssiger bis pastöser Produkte, die einen Antrieb aufweist, der über eine Antriebswelle mit einem Rotor in Verbindung steht, wobei ein erster Stator und mindestens ein weiterer Reservestator vorgesehen sind.The invention relates to an eccentric screw pump for pumping liquid up pasty products that have a drive that is connected via a drive shaft with a Rotor is connected, a first stator and at least one further Reservestator are provided.

Eine entsprechende Anordnung von Rotor und Stator bzw. Ersatzstator geht aus der DE 33 45 233 C2 hervor. Hier wird eine Exzenterschneckenpumpe zum Fördern von Flüssigkeiten aus Bohrlöchern eingesetzt. Die Exzenterschneckenpumpen befinden sich in großen Tiefen von bis zu einigen Hundert Metern. Da es beim Verschleiß eines Stators sehr aufwendig wäre, die Pumpe aus dieser Tiefe zu holen, hat man hier einen oder mehrere Ersatzstatoren vorgesehen, die in Abständen voneinander angeordnet sind. Den Abstand zwischen den Statoren füllt die Steigleitung aus. Kommt es nun zu einem Einsatz, des/der Reservestators/-statoren so wird bei diesem Anwendungsfall das Gestänge verlängert bzw. verkürzt.A corresponding arrangement of rotor and stator or replacement stator is shown in the DE 33 45 233 C2. Here is an eccentric screw pump for pumping Liquids from wells used. The eccentric screw pumps are located themselves at great depths of up to a few hundred meters. Since it is worn out of a stator would be very expensive to get the pump from this depth one or more replacement stators are provided, which are spaced apart are arranged. The riser fills the distance between the stators. If there is a deployment, the reserve statator (s) will be used for this Use the linkage lengthened or shortened.

Aus der DE 19 85 861 U ist ein Stator für eine Exzenterschneckenpumpe bekannt, der sich aus zwei Teilen zusammensetzt. Die Stoßstellen der beiden Teile sind durch einen Dichtring abgedichtet. Der Rotor erstreckt sich über beide Statorteile.A stator for an eccentric screw pump is known from DE 19 85 861 U, which is composed of two parts. The joints of the two parts are through sealed a sealing ring. The rotor extends over both stator parts.

Eine entsprechende Einrichtung wäre bei den herkömmlichen über Tage betriebenen Exzenterschneckenpumpen zu aufwendig und würde die Bauweise der Pumpen vergrößern.A corresponding facility would be in the conventional open-plan Eccentric screw pumps would be too expensive and the construction of the pumps enlarge.

Der Erfindung liegt demnach die Aufgabe zugrunde, die Baulänge und den mechanischen Aufwand der Pumpe beim Einsatz von Reservestatoren zu verringern.The invention is therefore based on the task, the overall length and to reduce the mechanical expenditure of the pump when using reserve stators.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des 1. Anspruchs gelöst.The object is achieved by the features of claim 1.

Erfinderische Weiterentwicklungen sind den Merkmalen der Unteransprüche zu entnehmen.Innovative developments are the features of the subclaims remove.

In einer bevorzugten Ausführungsform ist der Stator mit dem Reservestator ohne Zwischenraum aneinandergefügt. Vorteilhafterweise sind die beiden Statorelemente in ein Statorgehäuse eingebracht und als ein Stück gefertigt. In a preferred embodiment, the stator with the reserve stator is without Gaped together. The two stator elements are advantageous placed in a stator housing and manufactured as one piece.

Der Wechsel zur Inanspruchnahme des Reservestators erfolgt vorteilhafterweise dadurch, daß die beiden in direkter Verbindung miteinander stehenden Statoren um 180 ° zu ihrer Längsachse gewendet werden, wodurch der Reservestator in den Wirkungsbereich des Rotors gelangt.The switch to using the reserve stator is advantageously carried out in that the two stators in direct connection with each other 180 ° to its longitudinal axis, whereby the reserve stator in the Effective range of the rotor reaches.

Die biegeelastische Welle benötigt für den Ausgleich der vom Rotor erzeugten Exzentrizität aufgrund ihres Elastizitätsmoduls eine bestimmte Baulänge. Dadurch, daß sich die biegeelastische Welle über das Pumpengehäuse hinaus auch über den dem Antrieb nächstgelegenen Statorteil erstreckt, wird die Baulänge der Pumpe um die Länge des Stators bzw. Reservestators reduziert.The flexurally elastic shaft is required to compensate for those generated by the rotor Eccentricity due to its modulus of elasticity a certain length. Thereby, that the flexurally elastic wave beyond the pump housing also beyond the the stator part closest to the drive extends the overall length of the pump the length of the stator or reserve stator is reduced.

Entsprechend einer weiteren erfindungsgemäßen Ausführung kann der Stator um ein Zwischenrohr ergänzt werden. Dieses Zwischenrohr kann sowohl am direkten saugseitigen Anschluß des Stators nach dem Pumpengehäuse angeordnet sein als auch am druckseitigen Ende des Stators vor dem Auslaßstutzen. Durch den Einsatz dieses Zwischenrohrs am saugseitigen Ende des Stators wird die für die biegeelastische Welle benötigte Länge beibehalten, unabhängig davon, welcher Stätorteil im Einsatz ist.According to a further embodiment according to the invention, the stator can be one Intermediate tube can be supplemented. This intermediate pipe can be used both on the direct suction-side connection of the stator after the pump housing can be arranged as also at the pressure side end of the stator in front of the outlet port. Because of the engagement this intermediate tube at the suction end of the stator is for the Bending elastic shaft maintain the required length, regardless of which Stätorteil is in use.

Für den schnellen Wechsel des Stators und für den Wechsel des Zwischenrohres ist es vorteilhaft, wenn die Pumpenflansche, der Stator, das Zwischenrohr und das Pumpengehäuse durch Schnellspannvorrichtungen miteinander verbunden sind.For the quick replacement of the stator and for the replacement of the intermediate tube it is advantageous if the pump flanges, the stator, the intermediate tube and the Pump housings are connected to each other by quick release devices.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen beschrieben.The invention is described below using exemplary embodiments.

Es zeigt

  • Fig. 1 einen Längsschnitt einer Exzenterschneckenpumpe
  • Fig. 2 einen Ausschnitt einer Rotor-Statoranordnung und Exzenterschneckenpumpe
  • Fig. 3 einen Ausschnitt einer Rotor-Statoranordnung und Exzenterschneckenpumpe
    • It shows
  • Fig. 1 shows a longitudinal section of an eccentric screw pump
  • Fig. 2 shows a section of a rotor-stator arrangement and eccentric screw pump
  • Fig. 3 shows a section of a rotor-stator arrangement and eccentric screw pump

    • Fig. 1 zeigt eine Exzenterschneckenpumpe 10 vom Moineau-Typ mit einem Antrieb 12 und einem Getriebe 14, das über eine Hohlwelle mit einer Antriebswelle 16 verbunden ist. Die Antriebswelle 16 ist mit einer Dichtung 18 versehen, die das Eindringen von Produkt in den Bereich der Lagerung 20 verhindert. Die biegeelastische Welle 22 und die Antriebswelle 16 sind durch eine Schraub-, Schrumpf- oder Klebeverbindung drehfest miteinander fixiert. Das Pumpengehäuse 26 verfügt über einen Einlaufstutzen 28 über den das Produkt in die Exzenterschneckenpumpe 10 gesaugt wird. Durch das Lösen der Schraube 30 und Öffnen der Schnellspannvorrichtung 32 läßt sich der gesamte Stator 38 gleichzeitig mit dem Endstutzen 34, mit dem Rotor 36, der biegeelastischen Welle 22, der Antriebswelle 16 und der Dichtung 18 als eine Einheit vom Pumpengehäuse 26 und Antrieb 12 abziehen und gegen eine neue Austausch-Einheit ersetzen. Der Stator selbst besteht aus einer verformbaren Innenschicht mit einer mindestens zweigängigen Wendel zur Aufnahme des Rotors und einem starren Statormantel. Der Stator 38 setzt sich aus einem Arbeitsbereich 42, in welchem sich der Rotor 36 befindet, und einem Reservebereich 44 zusammen. Durch Umkehren des Stators 38 um 180° zur Längsachse der Exzenterschneckcenpumpe 10 gelangt der Reservebereich 44 in Verbindung mit dem Rotor.1 shows an eccentric screw pump 10 of the Moineau type with a drive 12 and a gear 14, which is connected to a drive shaft 16 via a hollow shaft connected is. The drive shaft 16 is provided with a seal 18 which Prevention of product in the area of storage 20 prevented. The flexible shaft 22 and the drive shaft 16 are by a screw, Shrink or adhesive connection fixed in rotation with each other. The pump housing 26 has an inlet connection 28 through which the product into the Eccentric screw pump 10 is sucked. By loosening the screw 30 and Opening the quick release device 32 allows the entire stator 38 to be opened simultaneously with the end piece 34, with the rotor 36, the flexible shaft 22, the Drive shaft 16 and the seal 18 as a unit from the pump housing 26 and Pull off drive 12 and replace it with a new exchange unit. The stator itself consists of a deformable inner layer with at least one two-turn helix to accommodate the rotor and a rigid stator jacket. The Stator 38 is made up of a working area 42 in which rotor 36 is located is located, and a reserve area 44 together. By reversing the stator 38 by 180 ° to the longitudinal axis of the eccentric screw pump 10 Reserve area 44 in connection with the rotor.

    Aus Fig. 2 und Fig. 3 sind die Anordnungen eines Zwischenrohres 40 zu entnehmen.The arrangements of an intermediate tube 40 can be seen from FIGS. 2 and 3.

    In Fig. 2 befindet sich das Zwischenrohr 40 solange zwischen dem druckseitigen Ende des Stators 38 und dem Endstutzen 34 bis der Teilbereich des Stators 38 der momentan am Pumpbetrieb beteiligt ist, einem bestimmten Verschleiß unterliegt. Wird dieser Verschleiß durch nachlassenden Pumpendruck o.ä. Verschleißmerkmale festgestellt, so stellt man den Pumpenbetrieb ein, löst die Schnellspannvorrichtungen 32, setzt das Zwischenrohr 40 direkt an das Pumpengehäuse 26 und schließt die Schnellspannvorrichtung 32. Durch das Umsetzen des Zwischengehäuses verschiebt sich die Lage des Rotors 36 nicht, jedoch die Lage des Stators 38 und somit verschiebt sich der Bereich, in dem der Rotor mit dem Stator 38 als Pumpe zusammenarbeitet um die Hälfte der gesamten Statorlänge. In Fig. 2, the intermediate tube 40 is between the pressure side End of the stator 38 and the end connector 34 to the portion of the stator 38 is currently involved in pump operation, is subject to a certain amount of wear. Is this wear and tear caused by decreasing pump pressure or similar? wear characteristics determined, the pump operation is stopped and the quick-release devices are released 32, puts the intermediate pipe 40 directly to the pump housing 26 and closes the Quick release device 32. Moved by moving the intermediate housing not the position of the rotor 36, but the position of the stator 38 and thus shifts the area in which the rotor with the stator 38 as a pump works together by half the total stator length.

    BezugsziffernlisteReferences list

    1010
    ExzenterschneckenpumpeCavity Pump
    1212
    Antriebdrive
    1414
    Getriebetransmission
    1616
    Antriebswelledrive shaft
    1818
    Dichtungpoetry
    2020
    Lagerungstorage
    2222
    Wellewave
    2626
    Pumpengehäusepump housing
    2828
    Einlaufstutzenflowguide
    3030
    Schraubescrew
    3232
    Schnell spannvorrichtungQuick clamping device
    3434
    Endstutzenend stub
    3636
    Rotorrotor
    3838
    Statorstator
    4040
    Zwischenrohrintermediate pipe
    4242
    ArbeitsbereichWorkspace
    4444
    Reservebereichreserve area

    Claims (7)

    Exzenterschneckenpumpe (10) zur Förderung flüssiger bis pastöser Produkte, die einen Antrieb (12) aufweist, der über eine Antriebswelle (16) mit einem Rotor (36) in Verbindung steht, wobei ein erster Statoren (38) und mindestens ein weiterer Reservestator vorgesehen sind,
    dadurch gekennzeichnet, daß der Stator (38) und der mindestens eine weitere Reservestator ohne Zwischenraum aneinandergefügt sind, so daß der Stator einen Arbeitsbereich (42) und einen Reservebereich (44) aufweist, wobei der Stator zur Umschaltung der Bereiche umgekehrt oder verschoben wird.    Eccentric screw pump (10) for conveying liquid to pasty products, which has a drive (12) which is connected to a rotor (36) via a drive shaft (16), a first stators (38) and at least one further reserve stator being provided .
    characterized in that the stator (38) and the at least one further reserve stator are joined together without a gap, so that the stator has a working area (42) and a reserve area (44), the stator being reversed or shifted to switch over the areas.         Exzenterschneckenpumpe nach Anspruch 1,
    dadurch gekennzeichnet, daß ein Stator und mindestens ein weiterer Reservestator zu einem Stator (38) in einem Statormantel zusammengesetzt sind.    Eccentric screw pump according to claim 1,
    characterized in that a stator and at least one further reserve stator are combined to form a stator (38) in a stator casing.         Exzenterschneckenpumpe nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß .der Wechsel des Eingriffs des Rotors vom benutzten Teil des Stators zum in Reserve gehaltenen Teil des Stators durch Umkehren des gesamten Stators (38) um 180 ° zu einer Längsachse geschieht.    Eccentric screw pump according to claim 1 or 2,
    characterized in that . the change in the engagement of the rotor from the used part of the stator to the part of the stator kept in reserve occurs by reversing the entire stator (38) by 180 ° to a longitudinal axis.         Exzenterschneckenpumpe nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, daß der Rotor über eine biegeelastische Welle (22) mit dem Antrieb (12) in Verbindung steht, die sich stets auch über die dem Antrieb nächstgelegene freie Statorhälfte erstreckt.    Eccentric screw pump according to one of claims 1 to 3,
    characterized in that the rotor is connected to the drive (12) via a flexible shaft (22) which always extends over the free stator half closest to the drive.         Exzenterschneckenpumpe nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, daß der Stator (38) ein Zwischenrohr (40) aufweist, das sowohl am saug- als auch am druckseitigen Ende des Stators (38) angeordnet sein kann.     Eccentric screw pump according to one of claims 1 to 4,
    characterized in that the stator (38) has an intermediate tube (40) which can be arranged both at the suction and at the pressure end of the stator (38).         Exzenterschneckenpumpe nach Anspruch 4 und 5,
    dadurch gekennzeichnet, daß sich die biegeelastische Welle (22) durch das Zwischenrohr (20) hindurch bis zum Stator (38) erstreckt.    Eccentric screw pump according to claim 4 and 5,
    characterized in that the flexurally elastic shaft (22) extends through the intermediate tube (20) to the stator (38).         Exzenterschneckenpumpe nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, daß der Stator (38) über die Schnellspannvorrichtung (32) mit dem Pumpengehäuse (26) und dem Endstutzen (34) verbunden ist.    Eccentric screw pump according to one of claims 1 to 6,
    characterized in that the stator (38) is connected to the pump housing (26) and the end connector (34) via the quick release device (32).
    EP03020374A 2002-09-20 2003-09-10 Moineau-type pump with spare stator Withdrawn EP1400694A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10243674 2002-09-20
    DE10243674A DE10243674B3 (en) 2002-09-20 2002-09-20 Eccentric screw pump with reserve stator

    Publications (2)

    Publication Number Publication Date
    EP1400694A2 true EP1400694A2 (en) 2004-03-24
    EP1400694A3 EP1400694A3 (en) 2006-04-26

    Family

    ID=31896218

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP03020374A Withdrawn EP1400694A3 (en) 2002-09-20 2003-09-10 Moineau-type pump with spare stator

    Country Status (3)

    Country Link
    US (1) US7104770B2 (en)
    EP (1) EP1400694A3 (en)
    DE (1) DE10243674B3 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1970569A1 (en) * 2007-03-16 2008-09-17 Knoll Maschinenbau Gmbh Eccentric screw pump with pump casing
    CN109072904A (en) * 2016-04-28 2018-12-21 Bsh家用电器有限公司 Eccentrie helical totorpump

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US8967985B2 (en) 2012-11-13 2015-03-03 Roper Pump Company Metal disk stacked stator with circular rigid support rings

    Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1985861U (en) * 1968-01-25 1968-05-22 Max Streicher STATOR ARRANGEMENT, IN PARTICULAR FOR Eccentric Screw Pumps.
    DE3345233A1 (en) * 1983-12-14 1985-06-27 Joh. Heinrich Bornemann GmbH & Co KG, 3063 Obernkirchen Eccentric screw pump for conveying liquids from boreholes, especially from petroleum boreholes
    WO2010021549A1 (en) * 2008-08-21 2010-02-25 Agr Subsea As Outer rotor of a progressing cavity pump having an inner and an outer rotor

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2957427A (en) * 1956-12-28 1960-10-25 Walter J O'connor Self-regulating pumping mechanism
    FR1189319A (en) * 1956-12-28 1959-10-01 Self-regulating pumping mechanism
    SE307736B (en) * 1964-08-18 1969-01-13 Flygts Pumpar Ab
    DE4330226C1 (en) * 1993-09-07 1994-09-08 Bornemann J H Gmbh & Co Eccentric worm screw pump
    US5807087A (en) * 1997-03-21 1998-09-15 Tarby, Inc. Stator assembly for a progressing cavity pump

    Patent Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1985861U (en) * 1968-01-25 1968-05-22 Max Streicher STATOR ARRANGEMENT, IN PARTICULAR FOR Eccentric Screw Pumps.
    DE3345233A1 (en) * 1983-12-14 1985-06-27 Joh. Heinrich Bornemann GmbH & Co KG, 3063 Obernkirchen Eccentric screw pump for conveying liquids from boreholes, especially from petroleum boreholes
    WO2010021549A1 (en) * 2008-08-21 2010-02-25 Agr Subsea As Outer rotor of a progressing cavity pump having an inner and an outer rotor

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1970569A1 (en) * 2007-03-16 2008-09-17 Knoll Maschinenbau Gmbh Eccentric screw pump with pump casing
    CN109072904A (en) * 2016-04-28 2018-12-21 Bsh家用电器有限公司 Eccentrie helical totorpump
    CN109072904B (en) * 2016-04-28 2020-01-10 Bsh家用电器有限公司 Eccentric screw pump

    Also Published As

    Publication number Publication date
    EP1400694A3 (en) 2006-04-26
    DE10243674B3 (en) 2004-04-01
    US7104770B2 (en) 2006-09-12
    US20050100468A1 (en) 2005-05-12

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