EP1308624B1 - Submersible motor-driven pump - Google Patents

Submersible motor-driven pump Download PDF

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Publication number
EP1308624B1
EP1308624B1 EP20010125851 EP01125851A EP1308624B1 EP 1308624 B1 EP1308624 B1 EP 1308624B1 EP 20010125851 EP20010125851 EP 20010125851 EP 01125851 A EP01125851 A EP 01125851A EP 1308624 B1 EP1308624 B1 EP 1308624B1
Authority
EP
European Patent Office
Prior art keywords
stator
pump
protective tube
housing
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20010125851
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German (de)
French (fr)
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EP1308624A1 (en
Inventor
Heine Larsen
Lars Ostergaard
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.)
Grundfos AS
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Grundfos AS
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Publication date
Application filed by Grundfos AS filed Critical Grundfos AS
Priority to EP20010125851 priority Critical patent/EP1308624B1/en
Priority to DE50108332T priority patent/DE50108332D1/en
Publication of EP1308624A1 publication Critical patent/EP1308624A1/en
Application granted granted Critical
Publication of EP1308624B1 publication Critical patent/EP1308624B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008—Pumps for submersible use, i.e. down-hole pumping

Definitions

  • the invention relates to a submersible pump with a motor and a Eccentric screw pump, which via a drive shaft with each other are connected.
  • US 4,718,824 discloses a submersible motor pump which substantially is made up of three parts. At the bottom of a drive motor is arranged. At the upper end of the drive motor, an oil chamber is flanged. At the upper end of the oil chamber in turn is the tubular Flanged pump housing, which is at its upper end tapered to form a pump head for connection to a pipeline. The pump housing is closed from the lower end. In the Inside the pump housing are arranged eccentric screw pumps, which via inserts, which from the lower end into the pump housing are inserted at the lower flange of the pump housing and thus supported on the engine. In this way, the Stators of the eccentric screw pumps supported directly on the engine.
  • the submersible motor pump according to the invention has an eccentric screw pump which is driven by a motor via a drive shaft becomes.
  • the progressing cavity pump also as a Moineau pump known, has an outside stator and one in the Inside arranged rotor.
  • the stator has a longitudinal bore with a constant, circular cross section, whose eccentric lying Center turns helically around the longitudinal axis.
  • the Stator length with one turn is called a step.
  • the rotor also has an equal circular cross-section over its entire length, its center is also helical eccentric turns around the longitudinal axis.
  • the rotor has twice the number of turns like the stator.
  • the Drive shaft and the eccentric screw pump in a common Protective tube arranged.
  • this joint protection tube a constant cross-section, leaving a smooth outer shell the submersible pump can be created.
  • the protective tube is with connected to the motor housing of the engine.
  • the protective tube can one larger diameter or cross-section than the eccentric screw pump. This allows easy attachment of a Pump head to the protective tube, without further fasteners required are.
  • a first support element arranged, which with the Protective tube is connected and the stator of the eccentric screw pump is supported at a first longitudinal end of the stator in an axial direction and fixed in a radial direction in the protective tube.
  • this support element is designed as a flat disc, which extends transversely to the longitudinal axis of the protective tube.
  • the support element is fixed inside the protective tube, for example with the Thermowell welded. This first support element is on the engine arranged facing side of the stator.
  • the protective tube is at a first end to the motor housing and connected at a second end to a pump head. It is thus a very easy connection between the pump head and motor created which no additional fasteners and only a few joints required.
  • that can Protective tube via an external or internal thread with the motor housing be screwed and the pump head can also have a corresponding Thread screwed into the protective tube or to this be screwed on.
  • the pump head By removing the pump head is the Eccentric screw pump easily accessible, so that the stator, which a wearing part of the eccentric screw pump is easily replaced can be. For replacement, it is not necessary a variety of screws, since preferably only the pump head must be removed from the protective tube.
  • stator in the region of a second longitudinal end of the stator arranged second support member, which the stator in the radial direction fixed in the protective tube.
  • the stator has a preferably circular cylindrical stator housing and one on the inner wall the elastomeric layer arranged on the stator housing, wherein the Elastomer layer on at least a first longitudinal end of the stator housing extends beyond the longitudinal end.
  • the elastomer layer consists of rubber or a suitable elastomer. By doing that this layer extends longitudinally beyond the stator housing, for example, the elastomer layer in which the stator structure is formed may be simultaneous be used as the seal of the stator housing. It is not required to seal the pressure chamber inside the stator at Provide an additional sealing element end of the stator housing.
  • the Sealing function can simultaneously from the anyway in the eccentric screw pump existing elastomer material mitübernommen become.
  • the elastomer layer extends at least at the first longitudinal end of the stator housing radially over an inner circumference of the Stator housing out to the outside.
  • the elastomer layer overlaps in the radial direction at least a portion of the end face or end edge of the stator housing.
  • the elastomer layer can thus be used as an axial seal between the stator housing and an adjacent component Act.
  • the elastomer layer extends over the entire End face or end edge of the stator housing, which usually a Steel tube is. In this way, a reliable seal of the Inside the eccentric screw pump can be achieved.
  • the second longitudinal end of the stator is supported in the axial direction at the pump head.
  • the stator is over the Stator housing between the first support member and the pump head clamped or clamped.
  • the required clamping force is over transmit the outer protective tube, so no additional Clamping elements are required.
  • the over the front edge of the stator housing radially projecting portion of the elastomeric layer is preferably arranged in the region of the second longitudinal end of the stator, so that he as Seal between the stator housing and the pump head acts.
  • the pressure range of the eccentric screw pump is very high sealed in a simple way. There are no additional sealing elements be arranged between the pump head and eccentric screw pump.
  • the eccentric screw pump in the protective tube is preferably at the first and / or second longitudinal end of Stators formed on an outer surface of the stator at least one recess, which with the first and the second support element in Intervention is.
  • this recess is on the outer circumference of the stator housing formed in the form of a paragraph.
  • the two support elements which are preferably formed as flat discs, respectively a through hole provided in which the stator or the stator housing engages with the return.
  • the return is a paragraph or a shoulder, which in the axial direction on the respective support element is applied.
  • the diameter of the through hole in the support elements preferably corresponds substantially to the outer diameter the stator or the stator housing, so that the stator as possible is fixed free of play in the radial direction in the support elements.
  • At least on the first support element, which is fixedly arranged in the protective tube is, supports the stator or the stator housing with the return in axial direction.
  • the second support element is preferably also as formed flat disc, which has outer dimensions, in the Substantially correspond to the internal dimensions of the protective tube, so that the second support element in the radial direction, i. transverse to the longitudinal direction of the support tube, is fixed in this.
  • In the axial direction is a Fixation of the second support element not required, since it is in this Direction no support function must take over.
  • the eccentric screw pump is preferred only fixed by the pump head in the axial direction.
  • the second Support element is loosely arranged, allowing it to replace the stator housing can be easily removed from the protective tube.
  • the protective tube, the motor housing and preferably the pump head in cross section essentially the same external dimensions. That way, one becomes Submersible motor pump created, which is a substantially constant Has cross-section, so that they are easily inserted into a borehole and can be removed again without the risk that is hooked the pump in the wellbore. Furthermore, a smooth appearance of the Pump to be created, which is easy to handle and cleaning the pump favors.
  • Figure 1 shows a cross-sectional view of the entire submersible motor pump.
  • the submersible pump is usually in the vertical direction in a Drill hole used so that the outflow end is located above. In the Further description will be made of this orientation of the submersible pump assumed, but this does not exclude another arrangement.
  • the engine 2 with the associated control or control electronics at the bottom of the submersible pump and dives into it promoting medium.
  • the electrical connection cable is connected by a Cable duct 4 on the outside of the submersible pump led upwards.
  • Of the Motor 2 with the associated electronics is in a cylindrical motor housing arranged. At the upper end is to the motor housing 5 a Thrust bearing 6 screwed.
  • the motor housing 5 and the thrust bearing 6 have substantially the same diameter.
  • the thrust bearing 6 simply in the motor housing 5 via corresponding Thread screwed or screwed.
  • a protective tube 8 Close to the thrust bearing 6 a protective tube 8, which continues in the longitudinal direction of the Motor housing 5 extends upward.
  • a flexible shaft 10 is arranged, which the thrust bearing 6 with a Eccentric screw pump 12 connects.
  • the thrust bearing 6 is connected to the Drive shaft of the motor 2 in conjunction.
  • the eccentric screw pump 12 via the thrust bearing 6 and the flexible shaft 10th driven.
  • a propshaft or other transmission element can be used which is capable of the eccentric movement of the pump rotor compensate.
  • inlet openings 14 are formed, through which the medium to be conveyed into the interior of the protective tube. 8 flows. Following the flexible shaft 10 is in the protective tube. 8 also the eccentric screw pump 12 is arranged.
  • the eccentric screw pump 12 consists of the rotor sixteenth and a stator housing 18, in the interior of which an elastomer layer 20 is arranged.
  • the stator housing 18 is of a substantially circular cylindrical steel tube formed.
  • the elastomer layer 20 is on the Inner wall of the stator housing 18 is formed, preferably on this vulcanized on. In the elastomer layer 20 is the helical structure of the stator the eccentric screw pump 12 is formed.
  • a first support plate 22 is arranged at the motor 2 facing the longitudinal end of the eccentric screw pump 12, d. H. usually the lower longitudinal end, is in the protective tube 8, a first support plate 22 is arranged.
  • the support plate 22 is fixed with the protective tube 8 connected, preferably welded.
  • a through hole 24 is provided in the center of Support plate 22 .
  • the stator housing 18 engages with a shoulder 26 at its first longitudinal end in the through hole 24 on.
  • the paragraph 26 and thus the stator housing 18 preferably free of play in the through hole 24 in the radial direction fixed.
  • the shoulder 26 abuts with a shoulder in the axial direction the surface, i. the top of the support plate 22 at. In this way the stator housing 18 is in an axial direction on the support plate 22nd supported.
  • the medium to be conveyed flows through the inlet holes 14 in the protective tube 18 and then through the through hole 24 in the support plate 22 in the eccentric screw 12 a.
  • the second support plate 28 has as well as the first support plate 22 an outer diameter, which is substantially the inner diameter of the protective tube 8 corresponds. In this way, the support plate 28 substantially free of play in the radial direction in the protective tube 8 fixed.
  • the support plate 28 has a central through hole 30, through which the stator housing 18 extends.
  • the through hole 30 is as the through hole 24 concentric with the longitudinal axis of the protective tube 8 arranged.
  • the protective tube 18 also has at its second Longitudinal paragraph a paragraph 32, which in the through hole 30 at the Support plate 28 engages.
  • the stator housing 18 is as free of play as possible arranged in the through hole 30 to a radial fixation of the Stator housing in the protective tube 8 also at the second longitudinal end of the To ensure stators. So that the stator can be easily exchanged can, the support plate 28 is not in the protective tube 8 in the axial direction fixed. It lies only on the shoulder of the shoulder 32 of the stator 18 on. To remove the stator with the stator 18, the Support plate 28 simply pulled upwards out of the protective tube 8 so that subsequently stator and rotor of the eccentric screw pump 12 can also be removed from the protective tube 8.
  • the submersible pump completed by a head or a pump head 34.
  • the pump head 34 is in the protective tube 8 at the Thrust bearing remote end formed a thread 36, in which the pump head 34 is screwed or screwed.
  • the pump head 34 has at its end remote from the eccentric screw pump an outlet opening 38, to which a pressure line connected can be.
  • a valve 40 e.g. Check valve or pressure relief valve arranged.
  • the valve 40 is a check valve.
  • the pump head 34 simultaneously assumes the fixation of the eccentric screw pump 12 in the axial direction in the protective tube 8.
  • the Outlet opening 38 facing away from the longitudinal end 42 of the pump head 34 in Contact with the second longitudinal end of the stator housing 18 of the eccentric screw pump 12.
  • the stator housing 18 is between the support plate 22 and the end 42 of the pump head 34 is clamped or clamped. There are no additional clamping or fastening elements for fixing the eccentric screw pump 12 in the protective tube 8 or on the motor housing 6 required.
  • the elastomer layer 20 at the second longitudinal end of the stator housing 18 is formed.
  • the collar 44 is in both axial and radial direction over the stator housing 18, so that it the front edge of the stator housing 18 is covered at least on its inner circumference. In this case, the collar 44 extends over the entire circumference of the stator housing 18.
  • the collar 44 is located between the longitudinal end 42 of the pump head 34 and the stator housing 18 so that it has the interface seals between these two elements. It is therefore not additional Seal between stator and pump head 34 required.
  • the embodiment of the submersible pump in the above-described Way allows a very easy installation of the eccentric screw pump 12 and in particular a simple change of the stator of the eccentric screw pump 12, which represents a wearing part.
  • Rotor 16 and Stator housing 18 with the vulcanized elastomer layer 20 form a Art cartridge and are simply inserted from above into the protective tube 8.
  • the second support plate 28 is placed and the pump head 34 screwed into the protective tube 8.
  • the Pumphead 34 and the eccentric screw pump 12 fixed and automatically the eccentric screw pump sealed against the pump head 34.
  • This also allows a lot simple design of the stator housing 18, since this no welded flanges must have.
  • stator which reduces the cost of wearing parts reduce.
  • the actual conveying elements, the rotor 16 and the stator 18, 20, which are the main wear parts of the submersible pump can easily be exchanged because they are easy in the Pump are plugged in and do not have extra bottle with the adjacent components of the submersible motor pump are connected have to.
  • the protective tube 8 allows in a simple manner that a pump head 34 can be arranged on the eccentric screw pump 12, which has a larger diameter than the eccentric screw pump 12 having. This allows in particular the arrangement of a larger Valve 40.
  • the entire outer casing of the submersible pump has preferably a substantially constant diameter or cross section on (see Figure 1). This favors a simple insertion and Take out the submersible pump in a borehole.
  • the inventive Submersible pump can be made in different diameters depending on the size of the borehole in which they are used shall be. Preferably, the diameter is between 3 and 5 inches.
  • the larger diameter head piece 34 allows the connection a pressure line with a larger pipe diameter.

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

Description

Die Erfindung betrifft eine Tauchmotorpumpe mit einem Motor und einer Exzenterschneckenpumpe, welche über eine Antriebswelle miteinander verbunden sind.The invention relates to a submersible pump with a motor and a Eccentric screw pump, which via a drive shaft with each other are connected.

Es sind Tauchmotorpumpen bekannt, bei welchen an einem Motorgehäuse eine Exzenterschneckenpumpe angebracht ist. Aufgrund des exzentrischen Laufs des Rotors der Exzenterschneckenpumpe müssen diese und der Motor über eine biegsame Welle oder Kardanwelle miteinander verbunden werden. Diese Welle wird meist in einem Schutzrohr angeordnet. Ferner ist ein Pumpenkopf erforderlich, um eine Druckleitung an die Pumpe anschließen zu können. Die Exzenterschneckenpumpe wird üblicherweise zwischen Pumpenkopf und dem Schutzrohr über zusätzliche Spannstäbe verspannt. Ferner muss an dem Stator der Exzenterschneckenpumpe ein Flansch ausgebildet sein, um die Pumpe mit einer Rohrleitung bzw. einem Pumpenkopf zu verbinden. Der Stator der Pumpe muss somit zusätzliche Rohrleitungskräfte aufnehmen, was eine aufwendigere Konstruktion und stabilere Dimensionierung des Stators erforderlich macht. Ferner führt diese Anordnung zu einer komplizierten Montage und Demontage der Pumpe. Eine Demontage ist in regelmäßigen Abständen zur Wartung erforderlich, weil der Rotor und insbesondere der Stator der Pumpe Verschleiß unterliegen. Außerdem bedingt diese Ausgestaltung eine zerklüftete Außenstruktur der Pumpe, was beim Einsetzen in ein Bohrloch nachteilig ist.There are known submersible motor pumps, in which on a motor housing an eccentric screw pump is mounted. Because of the eccentric Run the rotor of the eccentric screw pump must this and the motor via a flexible shaft or cardan shaft with each other get connected. This shaft is usually arranged in a protective tube. Furthermore, a pump head is required to a pressure line to connect the pump. The eccentric screw pump is usually between the pump head and the protective tube via additional Clamping rods clamped. Furthermore, on the stator of the eccentric screw pump a flange may be formed to carry the pump a pipeline or a pump head to connect. The stator of the Pump must therefore absorb additional piping forces, which is a more complex construction and more stable dimensioning of the stator required. Furthermore, this arrangement leads to a complicated Assembly and disassembly of the pump. Disassembly is in regular Intervals required for maintenance because of the rotor and in particular the stator of the pump are subject to wear. Also conditional this embodiment, a rugged outer structure of the pump, which is the case Insertion into a borehole is disadvantageous.

US 4,718,824 offenbart eine Tauchmotorpumpe, welche im Wesentlichen aus drei Teilen aufgebaut ist. Am unteren Ende ist ein Antriebsmotor angeordnet. Am oberen Ende des Antriebsmotors ist eine Ölkammer angeflanscht. Am oberen Ende der Ölkammer wiederum ist das rohrförmige Pumpengehäuse angeflanscht, welches sich an seinem oberen Ende verjüngt, um einen Pumpenkopf zum Anschluss einer Rohrleitung zu bilden. Das Pumpengehäuse ist vom unteren Ende her verschlossen. Im Inneren des Pumpengehäuses sind sei Exzenterschneckenpumpen angeordnet, welche über Einsätze, welche vom unteren Ende in das Pumpengehäuse eingeschoben sind, am unteren Flansch des Pumpengehäuses und damit am Motor abgestützt sind. Auf diese Weise sind die Statoren der Exzenterschneckenpumpen direkt am Motor abgestützt. Dieser Aufbau hat den Nachteil, dass zum Tausch des Pumpenstators, welcher ein Verschleißteil darstellt, die gesamte Pumpe zerlegt werden muss, insbesondere das Pumpengehäuse vom Motor getrennt werden muss. Darüber hinaus muss der stirnseitige Motorflansch ausreichend stabil ausgebildet sein, da er die Abstützkräfte der Statoren der Exzenterschneckenpumpen aufnehmen muss. Die Anordnung der Hülsen im Inneren des Schutzrohres beeinträchtigt ferner die Anordnung der Eintrittsöffnungen in dem Schutzrohr. So müssen auch die Hülsen entsprechende Öffnungen aufweisen, welche deckungsgleich zu den Öffnungen im Schutzrohr angeordnet werden müssen. Dies erschwert die Montage der Pumpe, da es bei falsch eingesetzten Hülsen leicht zu einer Verengung oder schlimmstenfalls zu einem Verschluss der Eintrittsöffnungen in dem Schutzrohr kommen kann.US 4,718,824 discloses a submersible motor pump which substantially is made up of three parts. At the bottom of a drive motor is arranged. At the upper end of the drive motor, an oil chamber is flanged. At the upper end of the oil chamber in turn is the tubular Flanged pump housing, which is at its upper end tapered to form a pump head for connection to a pipeline. The pump housing is closed from the lower end. in the Inside the pump housing are arranged eccentric screw pumps, which via inserts, which from the lower end into the pump housing are inserted at the lower flange of the pump housing and thus supported on the engine. In this way, the Stators of the eccentric screw pumps supported directly on the engine. This construction has the disadvantage that for replacing the pump stator, which is a wearing part, the entire pump are disassembled In particular, the pump housing must be disconnected from the engine got to. In addition, the end-side motor flange must be sufficiently stable be formed, as he the supporting forces of the stators of the eccentric screw pumps must record. The arrangement of the sleeves in the Inside the protective tube also affects the arrangement of the inlet openings in the protective tube. So must the pods appropriate Have openings which congruent to the openings must be placed in the protective tube. This makes assembly difficult the pump, since it is easy to use with incorrectly inserted sleeves Narrowing or, in the worst case, closing the inlet openings can come in the protective tube.

Es ist Aufgabe der Erfindung, eine verbesserte Tauchmotorpumpe mit einem Motor und einer Exzenterschneckenpumpe zu schaffen, welche einen vereinfachten Aufbau sowie eine vereinfachte Montage und Wartung der Pumpenteile ermöglicht.It is an object of the invention to provide an improved submersible pump a motor and an eccentric screw pump, which a simplified structure and simplified installation and maintenance allows the pump parts.

Diese Aufgabe wird durch eine Tauchmotorpumpe mit den im Anspruch 1 angegebenen Merkmalen gelöst. Bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen.This object is achieved by a submersible pump with the in claim 1 specified characteristics solved. Preferred embodiments result from the dependent claims.

Die erfindungsgemäße Tauchmotorpumpe weist eine Exzenterschneckenpumpe auf, welche durch einen Motor über eine Antriebswelle angetrieben wird. Die Exzenterschneckenpumpe, auch als Moineau-Pumpe bekannt, weist einen außen gelegenen Stator und einen in dessen Inneren angeordneten Rotor auf. Der Stator hat eine Längsbohrung mit gleichbleibendem, kreisförmigen Querschnitt, dessen exzentrisch liegender Mittelpunkt sich schraubenförmig um die Längsachse dreht. Die Statorlänge mit einer Windung wird als eine Stufe bezeichnet. Der Rotor hat ebenfalls auf seiner ganzen Länge einen gleichgroßen Kreisquerschnitt, dessen Mittelpunkt sich ebenfalls schraubenförmig exzentrisch um die Längsachse dreht. Dabei weist der Rotor die doppelte Windungszahl wie der Stator auf. Aufgrund dieser Anordnung erfährt der Rotor im Betrieb eine exzentrische Bewegung, weshalb die Antriebswelle einen radialen Versatz der Drehachsen von Motor und Rotor der Exzenterschneckenpumpe ausgleichen muss. Hierzu sind beispielsweise Biegestabwellen oder Kardanwellen geeignet. Gemäß der Erfindung sind die Antriebswelle und die Exzenterschneckenpumpe in einem gemeinsamen Schutzrohr angeordnet. Vorzugsweise weist dieses gemeinsame Schutzrohr einen konstanten Querschnitt auf, so dass ein glatter Außenmantel der Tauchmotorpumpe geschaffen werden kann. Das Schutzrohr ist mit dem Motorgehäuse des Motors verbunden. Das Schutzrohr kann einen größeren Durchmesser bzw. Querschnitt aufweisen als die Exzenterschneckenpumpe. Dies ermöglicht eine einfache Befestigung eines Pumpenkopfes an dem Schutzrohr, ohne dass weitere Verbindungselemente erforderlich sind. Es sind keine Flansche oder Befestigungselemente erforderlich, um den Stator der Exzenterschneckenpumpe mit dem Pumpenkopf bzw. einer Rohrleitung zu verbinden. Der Pumpenkopf wird über das Schutzrohr gehalten, so dass die Rohrleitungskräfte von diesem aufgenommen werden und die Exzenterschneckenpumpe außer den Förderkräften im Wesentlichen keine äußeren Kräfte übertragen muß. Dies ermöglicht eine einfachere Ausgestaltung der Exzenterschneckenpumpe. Rotor und Stator der Pumpe können als eine Patrone ausgebildet werden, welche als Verschleißteil leicht ersetzt werden kann. Der Durchmesser bzw. Querschnitt des Schutzrohres wird vorzugsweise abhängig vom Durchmesser eines Brunnenrohres gewählt, in welches die Tauchmotorpumpe eingesetzt werden soll. Ein übliches Standardmaß ist beispielsweise ein Durchmesser von 3 Zoll.The submersible motor pump according to the invention has an eccentric screw pump which is driven by a motor via a drive shaft becomes. The progressing cavity pump, also as a Moineau pump known, has an outside stator and one in the Inside arranged rotor. The stator has a longitudinal bore with a constant, circular cross section, whose eccentric lying Center turns helically around the longitudinal axis. The Stator length with one turn is called a step. The rotor also has an equal circular cross-section over its entire length, its center is also helical eccentric turns around the longitudinal axis. The rotor has twice the number of turns like the stator. Due to this arrangement learns the Rotor operating an eccentric motion, which is why the drive shaft a radial offset of the axes of rotation of the motor and rotor of the eccentric screw pump must balance. For this purpose, for example, bending rod waves or cardan shafts suitable. According to the invention, the Drive shaft and the eccentric screw pump in a common Protective tube arranged. Preferably, this joint protection tube a constant cross-section, leaving a smooth outer shell the submersible pump can be created. The protective tube is with connected to the motor housing of the engine. The protective tube can one larger diameter or cross-section than the eccentric screw pump. This allows easy attachment of a Pump head to the protective tube, without further fasteners required are. There are no flanges or fasteners required to the stator of the eccentric screw pump with the Pump head or a pipe to connect. The pump head is held over the protective tube so that the piping forces from this be taken and the eccentric screw pump except the Conveyors must transmit essentially no external forces. This allows a simpler design of the eccentric screw pump. Rotor and stator of the pump can be designed as a cartridge which can be easily replaced as a wearing part. Of the Diameter or cross section of the protective tube is preferably dependent chosen from the diameter of a well pipe, in which the Submersible motor pump to be used. A standard standard measure is for example, a diameter of 3 inches.

Zur Befestigung der Exzenterschneckenpumpe in dem Schutzrohr ist in dem Schutzrohr ein erstes Stützelement angeordnet, welches mit dem Schutzrohr verbunden ist und den Stator der Exzenterschneckenpumpe an einem ersten Längsende des Stators in einer axialen Richtung abstützt und in einer radialen Richtung in dem Schutzrohr fixiert. Vorzugsweise ist dieses Stützelement als flache Scheibe ausgebildet, welche sich quer zur Längsachse des Schutzrohres erstreckt. Das Stützelement ist im Inneren des Schutzrohres fest angeordnet, beispielsweise mit dem Schutzrohr verschweißt. Dieses erste Stützelement ist an der dem Motor zugewandten Seite des Stators angeordnet.For fixing the eccentric screw pump in the protective tube is in the protective tube, a first support element arranged, which with the Protective tube is connected and the stator of the eccentric screw pump is supported at a first longitudinal end of the stator in an axial direction and fixed in a radial direction in the protective tube. Preferably this support element is designed as a flat disc, which extends transversely to the longitudinal axis of the protective tube. The support element is fixed inside the protective tube, for example with the Thermowell welded. This first support element is on the engine arranged facing side of the stator.

Vorzugsweise ist das Schutzrohr an einem ersten Ende mit dem Motorgehäuse und an einem zweiten Ende mit einem Pumpenkopf verbunden. Es wird somit eine sehr leichte Verbindung zwischen Pumpenkopf und Motor geschaffen, welche keine zusätzlichen Befestigungselemente und nur wenige Verbindungsstellen erfordert. Beispielsweise kann das Schutzrohr über ein Außen- oder Innengewinde mit dem Motorgehäuse verschraubt werden und der Pumpenkopf kann ebenfalls über ein entsprechendes Gewinde in das Schutzrohr eingeschraubt bzw. an dieses angeschraubt werden. Durch Abnehmen des Pumpenkopfes wird die Exzenterschneckenpumpe leicht zugänglich, so dass der Stator, welcher ein Verschleißteil der Exzenterschneckenpumpe ist, leicht ausgetauscht werden kann. Zum Austausch ist es nicht erforderlich, eine Vielzahl von Schrauben zu lösen, da vorzugsweise lediglich der Pumpenkopf aus dem Schutzrohr herausgedreht werden muss.Preferably, the protective tube is at a first end to the motor housing and connected at a second end to a pump head. It is thus a very easy connection between the pump head and motor created which no additional fasteners and only a few joints required. For example, that can Protective tube via an external or internal thread with the motor housing be screwed and the pump head can also have a corresponding Thread screwed into the protective tube or to this be screwed on. By removing the pump head is the Eccentric screw pump easily accessible, so that the stator, which a wearing part of the eccentric screw pump is easily replaced can be. For replacement, it is not necessary a variety of screws, since preferably only the pump head must be removed from the protective tube.

Weiter bevorzugt ist im Bereich eines zweiten Längsende des Stators ein zweites Stützelement angeordnet, welches den Stator in radialer Richtung in dem Schutzrohr fixiert. Durch Verwendung des ersten und zweiten Stützelementes wird somit der Stator an seinen beiden Längsenden radial in dem Schutzrohr fixiert, so dass er im Wesentlichen zentrisch in dem Schutzrohr gehalten werden kann.Further preferred is in the region of a second longitudinal end of the stator arranged second support member, which the stator in the radial direction fixed in the protective tube. By using the first and second supporting element Thus, the stator is radially in at its two longitudinal ends fixed to the protective tube, so that it is substantially centric in the protective tube can be held.

In einer weiteren bevorzugten Ausführungsform weist der Stator eine vorzugsweise kreiszylindrisches Statorgehäuse und eine an der Innenwandung des Statorgehäuses angeordnete Elastomerschicht auf, wobei die Elastomerschicht sich an zumindest einem ersten Längsende des Statorgehäuses über dessen Längsende hinaus erstreckt. Die Elastomerschicht besteht aus Gummi oder einem geeigneten Elastomer. Dadurch, dass sich diese Schicht in Längsrichtung über das Statorgehäuse hinaus erstreckt, kann die Elastomerschicht, in der die Statorstruktur ausgebildet ist, gleichzeitig als Dichtung des Statorgehäuses verwendet werden. Es ist somit nicht erforderlich, zur Abdichtung des Druckraums im Inneren des Stators am Ende des Statorgehäuses ein zusätzliches Dichtelement vorzusehen. Die Dichtfunktion kann gleichzeitig von dem ohnehin in der Exzenterschneckenpumpe vorhandenen Elastomermaterial mitübernommen werden.In a further preferred embodiment, the stator has a preferably circular cylindrical stator housing and one on the inner wall the elastomeric layer arranged on the stator housing, wherein the Elastomer layer on at least a first longitudinal end of the stator housing extends beyond the longitudinal end. The elastomer layer consists of rubber or a suitable elastomer. By doing that this layer extends longitudinally beyond the stator housing, For example, the elastomer layer in which the stator structure is formed may be simultaneous be used as the seal of the stator housing. It is not required to seal the pressure chamber inside the stator at Provide an additional sealing element end of the stator housing. The Sealing function can simultaneously from the anyway in the eccentric screw pump existing elastomer material mitübernommen become.

Weiter bevorzugt erstreckt sich die Elastomerschicht zumindest an dem ersten Längsende des Statorgehäuses radial über einen Innenumfang des Statorgehäuses hinaus nach außen. Somit überdeckt die Elastomerschicht in radialer Richtung zumindest einen Teilbereich der Stirnfläche bzw. Stirnkante des Statorgehäuses. Die Elastomerschicht kann somit als Axialdichtung zwischen dem Statorgehäuse und einem angrenzenden Bauteil wirken. Vorzugsweise erstreckt sich die Elastomerschicht über die gesamte Stirnfläche bzw. Stirnkante des Statorgehäuses, welches üblicherweise ein Stahlrohr ist. Auf diese Weise kann einen zuverlässige Abdichtung des Inneren der Exzenterschneckenpumpe erreicht werden.More preferably, the elastomer layer extends at least at the first longitudinal end of the stator housing radially over an inner circumference of the Stator housing out to the outside. Thus, the elastomer layer overlaps in the radial direction at least a portion of the end face or end edge of the stator housing. The elastomer layer can thus be used as an axial seal between the stator housing and an adjacent component Act. Preferably, the elastomer layer extends over the entire End face or end edge of the stator housing, which usually a Steel tube is. In this way, a reliable seal of the Inside the eccentric screw pump can be achieved.

Zu einfacheren Fixierung der Exzenterschneckenpumpe in dem Schutzrohr stützt sich vorzugsweise das zweite Längsende des Stators in axialer Richtung an dem Pumpenkopf ab. Auf diese Weise wird der Stator über das Statorgehäuse zwischen dem ersten Stützelement und dem Pumpenkopf eingeklemmt bzw. verspannt. Die erforderliche Spann kraft wird dabei über das außenliegende Schutzrohr übertragen, so dass keine zusätzlichen Spannelemente erforderlich sind. Der über die Stirnkante des Statorgehäuse radial auskragende Bereich des Elastomerschicht ist dabei vorzugsweise im Bereich des zweiten Längsendes des Stators angeordnet, so dass er als Dichtung zwischen dem Statorgehäuse und dem Pumpenkopf fungiert. Dabei wird der Druckbereich der Exzenterschneckenpumpe auf sehr einfache Weise abgedichtet. Es müssen keine zusätzlichen Dichtelemente zwischen Pumpenkopf und Exzenterschneckenpumpe angeordnet werden. Zur besseren Fixierung der Exzenterschneckenpumpe in dem Schutzrohr ist vorzugsweise an dem ersten und/oder zweiten Längsende des Stators an einer Außenfläche des Stators zumindest ein Rücksprung ausgebildet, welcher mit dem ersten bzw. mit dem zweiten Stützelement in Eingriff ist. Vorzugsweise ist dieser Rücksprung am Außenumfang des Statorgehäuses in Form eines Absatzes ausgebildet. In den beiden Stützelementen, welche vorzugsweise als flache Scheiben ausgebildet sind, ist jeweils ein Durchgangsloch vorgesehen, in das der Stator bzw. das Statorgehäuse mit dem Rücksprung eingreift. Der Rücksprung bildet dabei einen Absatz bzw. eine Schulter, welche in axialer Richtung an dem jeweiligen Stützelement anliegt. Der Durchmesser des Durchgangsloches in den Stützelementen entspricht vorzugsweise im Wesentlichen dem Außendurchmesser des Stators bzw. des Statorgehäuses, so dass der Stator möglichst spielfrei in radialer Richtung in den Stützelementen fixiert wird. Zumindest an dem ersten Stützelement, welches fest in dem Schutzrohr angeordnet ist, stützt sich der Stator bzw. das Statorgehäuse mit dem Rücksprung in axialer Richtung ab. Das zweite Stützelement ist vorzugsweise ebenfalls als flache Scheibe ausgebildet, welche Außenabmessungen aufweist, die im Wesentlichen den Innenabmessungen des Schutzrohres entsprechen, so dass das zweite Stützelement in radialer Richtung, d.h. quer zur Längsrichtung des Stützrohres, in diesem fixiert ist. In axialer Richtung ist eine Fixierung des zweiten Stützelementes nicht erforderlich, da es in dieser Richtung keine Stützfunktion übernehmen muss. Im Bereich des zweiten Längsendes des Stators wird die Exzenterschneckenpumpe bevorzugt lediglich durch den Pumpenkopf in axialer Richtung fixiert. Das zweite Stützelement ist lose angeordnet, so dass es zum Austausch des Statorgehäuses leicht aus dem Schutzrohr entnommen werden kann. For easier fixation of the eccentric screw pump in the protective tube Preferably, the second longitudinal end of the stator is supported in the axial direction at the pump head. In this way, the stator is over the Stator housing between the first support member and the pump head clamped or clamped. The required clamping force is over transmit the outer protective tube, so no additional Clamping elements are required. The over the front edge of the stator housing radially projecting portion of the elastomeric layer is preferably arranged in the region of the second longitudinal end of the stator, so that he as Seal between the stator housing and the pump head acts. The pressure range of the eccentric screw pump is very high sealed in a simple way. There are no additional sealing elements be arranged between the pump head and eccentric screw pump. For better fixation of the eccentric screw pump in the protective tube is preferably at the first and / or second longitudinal end of Stators formed on an outer surface of the stator at least one recess, which with the first and the second support element in Intervention is. Preferably, this recess is on the outer circumference of the stator housing formed in the form of a paragraph. In the two support elements, which are preferably formed as flat discs, respectively a through hole provided in which the stator or the stator housing engages with the return. The return is a paragraph or a shoulder, which in the axial direction on the respective support element is applied. The diameter of the through hole in the support elements preferably corresponds substantially to the outer diameter the stator or the stator housing, so that the stator as possible is fixed free of play in the radial direction in the support elements. At least on the first support element, which is fixedly arranged in the protective tube is, supports the stator or the stator housing with the return in axial direction. The second support element is preferably also as formed flat disc, which has outer dimensions, in the Substantially correspond to the internal dimensions of the protective tube, so that the second support element in the radial direction, i. transverse to the longitudinal direction of the support tube, is fixed in this. In the axial direction is a Fixation of the second support element not required, since it is in this Direction no support function must take over. In the area of the second Along the stator, the eccentric screw pump is preferred only fixed by the pump head in the axial direction. The second Support element is loosely arranged, allowing it to replace the stator housing can be easily removed from the protective tube.

Gemäß einer weiteren bevorzugten Ausführungsform weisen das Schutzrohr, das Motorgehäuse und vorzugsweise der Pumpenkopf im Querschnitt im Wesentlichen gleiche Außenmaße auf. Auf diese Weise wird eine Tauchmotorpumpe geschaffen, welche einen im Wesentlichen konstanten Querschnitt aufweist, so dass sie leicht in ein Bohrloch eingesetzt und wieder entnommen werden kann, ohne das die Gefahr besteht, dass sich die Pumpe in dem Bohrloch verhakt. Ferner kann ein glattes Äußeres der Pumpe geschaffen werden, welches eine leichte Handhabung und Reinigung der Pumpe begünstigt.According to a further preferred embodiment, the protective tube, the motor housing and preferably the pump head in cross section essentially the same external dimensions. That way, one becomes Submersible motor pump created, which is a substantially constant Has cross-section, so that they are easily inserted into a borehole and can be removed again without the risk that is hooked the pump in the wellbore. Furthermore, a smooth appearance of the Pump to be created, which is easy to handle and cleaning the pump favors.

Nachfolgend wird die Erfindung beispielhaft anhand der beigefügten Figuren beschrieben. In diesem zeigt:

Figur 1
eine Querschnittansicht einer bevorzugten Ausführungsform der erfindungsgemäßen Tauchmotorpumpe und
Figur 2
eine vergrößerte Ansicht des Ausschnitts A aus Figur 1.
The invention will now be described by way of example with reference to the accompanying drawings. In this shows:
FIG. 1
a cross-sectional view of a preferred embodiment of the submersible motor pump according to the invention and
FIG. 2
an enlarged view of the section A of Figure 1.

Figur 1 zeigt eine Querschnittansicht der gesamten Tauchmotorpumpe. Die Tauchmotorpumpe wird üblicherweise in vertikaler Richtung in ein Bohrloch eingesetzt, so dass das Ausströmende oben angeordnet ist. In der weiteren Beschreibung wird von dieser Ausrichtung der Tauchmotorpumpe ausgegangen, wobei dies eine andere Anordnung nicht ausschließt. Dabei befindet sich der Motor 2 mit der zugehörigen Steuer- bzw. Regelelektronik am unteren Ende der Tauchmotorpumpe und taucht in das zu fördernde Medium ein. Die elektrische Anschlussleitung wird durch einen Kabelkanal 4 am Äußeren der Tauchmotorpumpe nach oben geführt. Der Motor 2 mit der zugehörigen Elektronik ist in einem zylindrischen Motorgehäuse angeordnet. Am oberen Ende ist an das Motorgehäuse 5 ein Drucklager 6 angeschraubt. Das Motorgehäuse 5 und das Drucklager 6 weisen im Wesentlichen denselben Durchmesser auf. Zur Montage wird das Drucklager 6 einfach in das Motorgehäuse 5 über entsprechende Gewinde eingeschraubt bzw. eingedreht. An das Drucklager 6 schließt sich ein Schutzrohr 8 an, welches sich weiter in der Längsrichtung des Motorgehäuses 5 nach oben erstreckt. Im Inneren des Schutzrohres 8 ist eine biegsame Welle 10 angeordnet, welche das Drucklager 6 mit einer Exzenterschneckenpumpe 12 verbindet. Das Drucklager 6 steht mit der Antriebswelle des Motors 2 in Verbindung. Auf diese Weise wird die Exzenterschneckenpumpe 12 über das Drucklager 6 und die biegsame Welle 10 angetrieben. Anstelle einer biegsamen Welle 10 kann beispielsweise auch eine Kardanwelle oder ein anderes Getriebeelement verwendet werden, welches in der Lage ist, die Excenterbewegung des Pumpenrotors zu kompensieren. In dem Schutzrohr sind Eintrittsöffnungen 14 ausgebildet, durch die das zu fördernde Medium in das Innere des Schutzrohres 8 einströmt. Im Anschluss an die biegsame Welle 10 ist in dem Schutzrohr 8 auch die Exzenterschneckenpumpe 12 angeordnet.Figure 1 shows a cross-sectional view of the entire submersible motor pump. The submersible pump is usually in the vertical direction in a Drill hole used so that the outflow end is located above. In the Further description will be made of this orientation of the submersible pump assumed, but this does not exclude another arrangement. Here is the engine 2 with the associated control or control electronics at the bottom of the submersible pump and dives into it promoting medium. The electrical connection cable is connected by a Cable duct 4 on the outside of the submersible pump led upwards. Of the Motor 2 with the associated electronics is in a cylindrical motor housing arranged. At the upper end is to the motor housing 5 a Thrust bearing 6 screwed. The motor housing 5 and the thrust bearing 6 have substantially the same diameter. For mounting will the thrust bearing 6 simply in the motor housing 5 via corresponding Thread screwed or screwed. Close to the thrust bearing 6 a protective tube 8, which continues in the longitudinal direction of the Motor housing 5 extends upward. Inside the protective tube 8 is a flexible shaft 10 is arranged, which the thrust bearing 6 with a Eccentric screw pump 12 connects. The thrust bearing 6 is connected to the Drive shaft of the motor 2 in conjunction. In this way, the eccentric screw pump 12 via the thrust bearing 6 and the flexible shaft 10th driven. Instead of a flexible shaft 10, for example, too a propshaft or other transmission element can be used which is capable of the eccentric movement of the pump rotor compensate. In the protective tube inlet openings 14 are formed, through which the medium to be conveyed into the interior of the protective tube. 8 flows. Following the flexible shaft 10 is in the protective tube. 8 also the eccentric screw pump 12 is arranged.

Die genaue Anordnung der Exzenterschneckenpumpe 12 in dem Schutzrohr 8 wird anhand des Ausschnittes A von Figur 1, welcher in Figur 2 dargestellt ist, näher erläutert. Das dem Drucklager 6 entgegengesetzte Längsende, d.h. in dieser Anordnung obere Ende, der biegsamen Welle 10 ist mit dem schneckenförmigen Rotor 16 der Exzenterschneckenpumpe 12 verbunden. Die Exzenterschneckenpumpe 12 besteht aus dem Rotor 16 sowie einem Statorgehäuse 18, in dessen Inneren eine Elastomerschicht 20 angeordnet ist. Das Statorgehäuse 18 wird von einem im Wesentlichen kreiszylindrischen Stahlrohr gebildet. Die Elastomerschicht 20 ist an der Innenwandung des Statorgehäuse 18 ausgebildet, vorzugsweise auf diese auf vulkanisiert. In der Elastomerschicht 20 ist die Wendelstruktur des Stators der Exzenterschneckenpumpe 12 ausgebildet.The exact arrangement of the eccentric screw pump 12 in the protective tube 8 will be described with reference to the detail A of FIG. 1, which is shown in FIG is explained in more detail. The opposite of the thrust bearing 6 Longitudinal end, i. in this arrangement upper end, the flexible shaft 10 is with the helical rotor 16 of the eccentric screw pump 12 connected. The eccentric screw pump 12 consists of the rotor sixteenth and a stator housing 18, in the interior of which an elastomer layer 20 is arranged. The stator housing 18 is of a substantially circular cylindrical steel tube formed. The elastomer layer 20 is on the Inner wall of the stator housing 18 is formed, preferably on this vulcanized on. In the elastomer layer 20 is the helical structure of the stator the eccentric screw pump 12 is formed.

An dem dem Motor 2 zugewandten Längsende der Exzenterschneckenpumpe 12, d. h. üblicherweise dem unteren Längsende, ist in dem Schutzrohr 8 eine erste Stützplatte 22 angeordnet. Die Stützplatte 22 ist fest mit dem Schutzrohr 8 verbunden, vorzugsweise verschweißt. Im Zentrum der Stützplatte 22 ist ein Durchgangsloch 24 vorgesehen. Das Statorgehäuse 18 greift mit einem Absatz 26 an seinem ersten Längsende in das Durchgangsloch 24 ein. Dabei wird der Absatz 26 und damit das Statorgehäuse 18 vorzugsweise spielfrei in dem Durchgangsloch 24 in radialer Richtung fixiert. Ferner liegt der Absatz 26 mit einer Schulter in axialer Richtung an der Oberfläche, d.h. der Oberseite der Stützplatte 22 an. Auf diese Weise wird das Statorgehäuse 18 in einer axialen Richtung an der Stützplatte 22 abgestützt. Das Ende der Excenterpumpe 12, welches in dem Durchgangsloch 24 der Stützplatte 22 angeordnet ist, bildet das Eintrittsende, durch welches ein zu förderndes Medium in die Exzenterschneckenpumpe 12 eintritt. Das zu fördernde Medium strömt durch die Eintrittslöcher 14 in das Schutzrohr 18 und dann durch das Durchgangsloch 24 in der Stützplatte 22 in die Exzenterschneckenpumpe 12 ein.At the motor 2 facing the longitudinal end of the eccentric screw pump 12, d. H. usually the lower longitudinal end, is in the protective tube 8, a first support plate 22 is arranged. The support plate 22 is fixed with the protective tube 8 connected, preferably welded. In the center of Support plate 22, a through hole 24 is provided. The stator housing 18 engages with a shoulder 26 at its first longitudinal end in the through hole 24 on. In this case, the paragraph 26 and thus the stator housing 18 preferably free of play in the through hole 24 in the radial direction fixed. Furthermore, the shoulder 26 abuts with a shoulder in the axial direction the surface, i. the top of the support plate 22 at. In this way the stator housing 18 is in an axial direction on the support plate 22nd supported. The end of the eccentric pump 12, which in the through hole 24 of the support plate 22 is arranged, forms the entrance end, through which a medium to be pumped into the eccentric screw pump 12 enters. The medium to be conveyed flows through the inlet holes 14 in the protective tube 18 and then through the through hole 24 in the support plate 22 in the eccentric screw 12 a.

Am oberen, d.h. dem Motor 2 abgewandten Längsende der Exzenterschneckenpumpe 12 ist in dem Schutzrohr 8 eine zweite Stützplatte 28 angeordnet. Die zweite Stützplatte 28 weist wie auch die erste Stützplatte 22 einen Außendurchmesser auf, welcher im Wesentlichen dem Innendurchmesser des Schutzrohres 8 entspricht. Auf diese Weise wird die Stützplatte 28 im Wesentlichen spielfrei in radialer Richtung in dem Schutzrohr 8 fixiert. Die Stützplatte 28 weist ein zentrales Durchgangsloch 30 auf, durch welches sich das Statorgehäuse 18 erstreckt. Das Durchgangsloch 30 ist wie das Durchgangsloch 24 konzentrisch zu der Längsachse des Schutzrohres 8 angeordnet. Das Schutzrohr 18 weist auch an seinem zweiten Längsende einen Absatz 32 auf, welcher in das Durchgangsloch 30 an der Stützplatte 28 eingreift. Dabei wird das Statorgehäuse 18 möglichst spielfrei in dem Durchgangsloch 30 angeordnet, um eine radiale Fixierung des Statorgehäuses in dem Schutzrohr 8 auch an dem zweiten Längsende des Stators zu gewährleisten. Damit der Stator leicht ausgetauscht werden kann, ist die Stützplatte 28 in axialer Richtung nicht in dem Schutzrohr 8 fixiert. Sie liegt lediglich auf der Schulter des Absatzes 32 des Statorgehäuses 18 auf. Zur Entnahme des Stators mit dem Statorgehäuse 18 kann die Stützplatte 28 einfach nach oben aus dem Schutzrohr 8 herausgezogen werden, so dass nachfolgend Stator und Rotor der Exzenterschneckenpumpe 12 ebenfalls aus dem Schutzrohr 8 entnommen werden können.At the top, i. the engine 2 facing away from the longitudinal end of the eccentric screw pump 12 is in the protective tube 8, a second support plate 28th arranged. The second support plate 28 has as well as the first support plate 22 an outer diameter, which is substantially the inner diameter of the protective tube 8 corresponds. In this way, the support plate 28 substantially free of play in the radial direction in the protective tube 8 fixed. The support plate 28 has a central through hole 30, through which the stator housing 18 extends. The through hole 30 is as the through hole 24 concentric with the longitudinal axis of the protective tube 8 arranged. The protective tube 18 also has at its second Longitudinal paragraph a paragraph 32, which in the through hole 30 at the Support plate 28 engages. The stator housing 18 is as free of play as possible arranged in the through hole 30 to a radial fixation of the Stator housing in the protective tube 8 also at the second longitudinal end of the To ensure stators. So that the stator can be easily exchanged can, the support plate 28 is not in the protective tube 8 in the axial direction fixed. It lies only on the shoulder of the shoulder 32 of the stator 18 on. To remove the stator with the stator 18, the Support plate 28 simply pulled upwards out of the protective tube 8 so that subsequently stator and rotor of the eccentric screw pump 12 can also be removed from the protective tube 8.

Am Austrittsende, d.h. dem oberen Ende, wird die Tauchmotorpumpe durch ein Kopfstück bzw. einen Pumpenkopf 34 abgeschlossen. Zur Befestigung des Pumpenkopfes 34 ist in dem Schutzrohr 8 an dessen dem Drucklager abgewandten Ende ein Gewinde 36 ausgebildet, in welches der Pumpenkopf 34 eingedreht bzw. eingeschraubtwird. Der Pumpenkopf 34 weist an seinem der Exzenterschneckenpumpe abgewandten Ende eine Austrittsöffnung 38 auf, an welche eine Druckleitung angeschlossen werden kann. Ferner ist in dem Pumpenkopf 34 ein Ventil 40, z.B. Rückschlag- oder Druckbegrenzungsventil, angeordnet. Im gezeigten Beispiel ist das Ventil 40 ein Rückschlagventil.At the exit end, i. the upper end, is the submersible pump completed by a head or a pump head 34. For fixing the pump head 34 is in the protective tube 8 at the Thrust bearing remote end formed a thread 36, in which the pump head 34 is screwed or screwed. The pump head 34 has at its end remote from the eccentric screw pump an outlet opening 38, to which a pressure line connected can be. Further, in the pump head 34, a valve 40, e.g. Check valve or pressure relief valve arranged. Im shown For example, the valve 40 is a check valve.

Der Pumpenkopf 34 übernimmt gleichzeitig die Fixierung der Exzenterschneckenpumpe 12 in axialer Richtung in dem Schutzrohr 8. Beim Einschrauben des Pumpenkopfes 34 in das Schutzrohr 8 kommt das der Austrittsöffnung 38 abgewandte Längsende 42 des Pumpenkopfes 34 in Kontakt mit dem zweiten Längsende des Statorgehäuses 18 des Exzenterschneckenpumpe 12. Auf diese Weise wird das Statorgehäuse 18 zwischen der Stützplatte 22 und dem Ende 42 des Pumpenkopfes 34 eingeklemmt bzw. eingespannt. Es sind keinerlei zusätzlichen Spann- oder Befestigungselemente zur Fixierung der Exzenterschneckenpumpe 12 in dem Schutzrohr 8 bzw. an dem Motorgehäuse 6 erforderlich.The pump head 34 simultaneously assumes the fixation of the eccentric screw pump 12 in the axial direction in the protective tube 8. When screwing the pump head 34 in the protective tube 8 is the the Outlet opening 38 facing away from the longitudinal end 42 of the pump head 34 in Contact with the second longitudinal end of the stator housing 18 of the eccentric screw pump 12. In this way, the stator housing 18 is between the support plate 22 and the end 42 of the pump head 34 is clamped or clamped. There are no additional clamping or fastening elements for fixing the eccentric screw pump 12 in the protective tube 8 or on the motor housing 6 required.

Zur Dichtung der Druckseite der Exzenterschneckenpumpe 12 ist die Elastomerschicht 20 an dem zweiten Längsende des Statorgehäuses 18 als Kragen 44 ausgebildet. Der Kragen 44 steht sowohl in axialer als auch radialer Richtung über das Statorgehäuse 18 vor, so dass er die Stirnkante des Statorgehäuses 18 zumindest an dessen inneren Umfang überdeckt. Dabei erstreckt sich der Kragen 44 über den gesamten Umfang des Statorgehäuses 18. Der Kragen 44 liegt zwischen dem Längsende 42 des Pumpenkopfes 34 und dem Statorgehäuse 18, so dass er die Schnittstelle zwischen diesen beiden Elementen abdichtet. Es ist somit keine zusätzliche Dichtung zwischen Stator und Pumpenkopf 34 erforderlich.To seal the pressure side of the eccentric screw pump 12 is the elastomer layer 20 at the second longitudinal end of the stator housing 18 as Collar 44 is formed. The collar 44 is in both axial and radial direction over the stator housing 18, so that it the front edge of the stator housing 18 is covered at least on its inner circumference. In this case, the collar 44 extends over the entire circumference of the stator housing 18. The collar 44 is located between the longitudinal end 42 of the pump head 34 and the stator housing 18 so that it has the interface seals between these two elements. It is therefore not additional Seal between stator and pump head 34 required.

Die Ausgestaltung der Tauchmotorpumpe in der oben beschriebenen Weise ermöglicht eine sehr leichte Montage der Exzenterschneckenpumpe 12 und insbesondere einen einfachen Wechsel des Stators der Exzenterschneckenpumpe 12, welche ein Verschleißteil darstellt. Rotor 16 und Statorgehäuse 18 mit der auf vulkanisierten Elastomerschicht 20 bilden eine Art Patrone und werden einfach von oben in das Schutzrohr 8 eingesteckt. Anschließend wird die zweite Stützscheibe 28 aufgelegt und der Pumpenkopf 34 in das Schutzrohr 8 eingeschraubt. Dabei werden gleichzeitig der Pumpenkopf 34 sowie die Exzenterschneckenpumpe 12 fixiert und automatisch die Exzenterschneckenpumpe gegen den Pumpenkopf 34 abgedichtet. Es müssen keine zusätzlichen Spannelemente zum Fixieren der Exzenterschneckenpumpe angebracht werden. Dies ermöglicht ferner eine sehr einfache Ausgestaltung des Statorgehäuses 18, da dieses keine angeschweißten Flansche aufweisen muss. Dies ermöglicht eine kostengünstigere Fertigung des Stators, wodurch sich die Kosten für die Verschleißteile verringern. Die eigentlichen Förderelemente, der Rotor 16 und der Stator 18, 20, welche die Hauptverschleißteile der Tauchmotorpumpe darstellen, können leicht ausgetauscht werden, weil sie einfach in die Pumpe eingesteckt werden und nicht über zusätzliche Flasche mit den angrenzenden Bauteilen der Tauchmotorpumpe verbunden werden müssen.The embodiment of the submersible pump in the above-described Way allows a very easy installation of the eccentric screw pump 12 and in particular a simple change of the stator of the eccentric screw pump 12, which represents a wearing part. Rotor 16 and Stator housing 18 with the vulcanized elastomer layer 20 form a Art cartridge and are simply inserted from above into the protective tube 8. Subsequently, the second support plate 28 is placed and the pump head 34 screwed into the protective tube 8. At the same time the Pumphead 34 and the eccentric screw pump 12 fixed and automatically the eccentric screw pump sealed against the pump head 34. There are no additional clamping elements for fixing the eccentric screw pump be attached. This also allows a lot simple design of the stator housing 18, since this no welded flanges must have. This allows for a lower cost Manufacture of the stator, which reduces the cost of wearing parts reduce. The actual conveying elements, the rotor 16 and the stator 18, 20, which are the main wear parts of the submersible pump can easily be exchanged because they are easy in the Pump are plugged in and do not have extra bottle with the adjacent components of the submersible motor pump are connected have to.

Ferner ermöglicht das Schutzrohr 8 auf einfache Weise, dass ein Pumpenkopf 34 an der Exzenterschneckenpumpe 12 angeordnet werden kann, welcher einen größeren Durchmesser als die Exzenterschneckenpumpe 12 aufweist. Dies ermöglicht insbesondere auch die Anordnung eines größeren Ventils 40. Der gesamte Außenmantel der Tauchmotorpumpe weist vorzugsweise einen im Wesentlichen konstanten Durchmesser bzw. Querschnitt auf (siehe Figur 1). Dies begünstigt ein einfaches Einsetzen und Herausnehmen der Tauchmotorpumpe in ein Bohrloch. Die erfindungsgemäße Tauchmotorpumpe kann in verschiedenen Durchmessern ausgeführt werden, abhängig von der Größe des Bohrlochs, in welche sie eingesetzt werden soll. Vorzugsweise liegt der Durchmesser zwischen 3 und 5 Zoll.Furthermore, the protective tube 8 allows in a simple manner that a pump head 34 can be arranged on the eccentric screw pump 12, which has a larger diameter than the eccentric screw pump 12 having. This allows in particular the arrangement of a larger Valve 40. The entire outer casing of the submersible pump has preferably a substantially constant diameter or cross section on (see Figure 1). This favors a simple insertion and Take out the submersible pump in a borehole. The inventive Submersible pump can be made in different diameters depending on the size of the borehole in which they are used shall be. Preferably, the diameter is between 3 and 5 inches.

Ferner ermöglicht das im Durchmesser größere Kopfstück 34 den Anschluss einer Druckleitung mit größerem Leitungsdurchmesser. Furthermore, the larger diameter head piece 34 allows the connection a pressure line with a larger pipe diameter.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

2 -2 -
Motorengine
4 -4 -
KabelkanalCabel Canal
5 -5 -
Motorgehäusemotor housing
6 -6 -
Drucklagerthrust bearing
8 -8th -
Schutzrohrthermowell
10 -10 -
biegsame Welleflexible shaft
12 -12 -
ExzenterschneckenpumpeCavity Pump
14 -14 -
Eintrittsöffnungeninlet openings
16 -16 -
Rotorrotor
18 -18 -
Statorgehäusestator
2020
Elastomerschichtelastomer layer
22 -22 -
erste Stützplattefirst support plate
24 -24 -
DurchgangslochThrough Hole
26 -26 -
Absatzparagraph
28 -28 -
zweite Stützplattesecond support plate
30 -30 -
DurchgangslochThrough Hole
32 -32 -
Absatzparagraph
34 -34 -
Kopfstück bzw. PumpenkopfHeadpiece or pump head
36 -36 -
Gewindethread
38 -38 -
Austrittsöffnungoutlet opening
40 -40 -
VentilValve
42 -42 -
Längsendelongitudinal end
44 -44 -
Kragencollar

Claims (8)

  1. A submersible motor pump with a motor (2) and with an eccentric worm pump (12) which are connected to one another via a drive shaft (10), wherein the drive shaft (10) and the eccentric worm pump (12) are arranged in a common protective tube (8), characterised in that the protective tube is connected to a motor housing (5) surrounding the motor (2), and in the first protective tube (8) there is arranged a first support element (22) which is firmly connected to the protective tube (8) and in an axial direction supports the stator of the eccentric worm pump (12) at that longitudinal end of the stator which faces the motor, and fixes it in the protective tube (8) in the radial direction.
  2. A submersible motor pump according to claim 1, with which the protective tube (8) at its first end is connected to the motor housing (5) and at its second end is connected to a pump head (34).
  3. A submersible motor pump according to claim 1 or 2, with which a second support element (28) is arranged in the region of a second longitudinal end of the stator and fixes the stator in the protective tube (8) in the radial direction.
  4. A submersible motor pump according to one of the preceding claims, with which the stator comprises a preferably circular-cylindrical stator housing (18) and an elastomer layer (20) which is arranged on the inner wall of the stator housing (18), wherein the elastomer layer (20) on at least one first longitudinal end of the stator housing (18) extends beyond its longitudinal end.
  5. A submersible motor pump according to claim 4, with which the elastomer layer (20) at the first longitudinal end of the stator housing (18) extends radially outwards beyond an inner periphery of the stator housing (18).
  6. A submersible motor pump according to one of the preceding claims, with which the second longitudinal end of the stator is supported on the pump head (34) in the axial direction.
  7. A submersible motor pump according to one of the preceding claims, with which at least one recess (26, 32) is formed on an outer surface of the stator at the first and/or on the second longitudinal end of the stator, said recess being engaged with the first (22) and second (28) support element respectively.
  8. A submersible motor pump according to one of the preceding claims, with which the protective tube (8), the motor housing (5) and preferably the pump head (34) have essentially the same outer dimensions in cross section.
EP20010125851 2001-10-30 2001-10-30 Submersible motor-driven pump Expired - Lifetime EP1308624B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20010125851 EP1308624B1 (en) 2001-10-30 2001-10-30 Submersible motor-driven pump
DE50108332T DE50108332D1 (en) 2001-10-30 2001-10-30 Submersible pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20010125851 EP1308624B1 (en) 2001-10-30 2001-10-30 Submersible motor-driven pump

Publications (2)

Publication Number Publication Date
EP1308624A1 EP1308624A1 (en) 2003-05-07
EP1308624B1 true EP1308624B1 (en) 2005-12-07

Family

ID=8179114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010125851 Expired - Lifetime EP1308624B1 (en) 2001-10-30 2001-10-30 Submersible motor-driven pump

Country Status (2)

Country Link
EP (1) EP1308624B1 (en)
DE (1) DE50108332D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464630A (en) * 2016-01-04 2016-04-06 山东润发石油设备科技有限公司 Screw pump directly driven through large-torque submersible motor
EP3825552A1 (en) 2019-11-22 2021-05-26 Grundfos Holding A/S Eccentric screw pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2118489B1 (en) 2007-03-01 2016-07-13 Hero Europe S.r.l. Cartridge -type single-screw pump and dye-meter equipped with such pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802803A (en) * 1971-10-13 1974-04-09 A Bogdanov Submersible screw pump
FR2372333A1 (en) * 1976-11-24 1978-06-23 Mecanique Metallurgie Ste Gle Gravity feed horizontal screw pump - has line of air injection holes through stator fed from supply line below
FR2551804B1 (en) * 1983-09-12 1988-02-05 Inst Francais Du Petrole DEVICE FOR USE IN PARTICULAR FOR PUMPING A VERY VISCOUS FLUID AND / OR CONTAINING A SIGNIFICANT PROPORTION OF GAS, PARTICULARLY FOR THE PRODUCTION OF OIL
DE3820003A1 (en) * 1988-06-11 1989-12-21 Grundfos Int SUBMERSIBLE PUMP UNIT
DE9319138U1 (en) * 1993-12-08 1994-05-19 Meyer, Werner, 59889 Eslohe Pressure booster for liquid to viscous vehicles with adjustable pressure compensation jacket
DE19615171C1 (en) * 1996-04-17 1997-11-27 Guenther Boehler Gmbh Pump for extracting liquid specimens esp. water in e.g. reservoir or container
DE19827101A1 (en) * 1998-06-18 1999-12-23 Artemis Kautschuk Kunststoff Machine used in deep drilling, especially in crude oil recovery
US6089832A (en) * 1998-11-24 2000-07-18 Atlantic Richfield Company Through-tubing, retrievable downhole pump system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464630A (en) * 2016-01-04 2016-04-06 山东润发石油设备科技有限公司 Screw pump directly driven through large-torque submersible motor
EP3825552A1 (en) 2019-11-22 2021-05-26 Grundfos Holding A/S Eccentric screw pump
WO2021099502A1 (en) 2019-11-22 2021-05-27 Grundfos Holding A/S Eccentric screw pump

Also Published As

Publication number Publication date
EP1308624A1 (en) 2003-05-07
DE50108332D1 (en) 2006-01-12

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