EP1308624B1 - Pompe à moteur submersible - Google Patents

Pompe à moteur submersible 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
Other languages
German (de)
English (en)
Other versions
EP1308624A1 (fr
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
Original Assignee
Grundfos AS
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 Grundfos AS filed Critical Grundfos AS
Priority to EP20010125851 priority Critical patent/EP1308624B1/fr
Priority to DE50108332T priority patent/DE50108332D1/de
Publication of EP1308624A1 publication Critical patent/EP1308624A1/fr
Application granted granted Critical
Publication of EP1308624B1 publication Critical patent/EP1308624B1/fr
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.

Landscapes

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

Claims (8)

  1. Pompe à moteur submersible comprenant un moteur (2) et une pompe à vis sans fin excentrique (12), qui sont reliés l'un à l'autre par un arbre d'entraínement (10), dans laquelle l'arbre d'entraínement (10) et la pompe à vis sans fin excentrique (12) sont aménagés dans un tube de protection commun (8), caractérisée en ce que le tube de protection est lié à un boítier de moteur (5) entourant le moteur (2) et en ce qu'un premier élément d'appui (22) est aménagé dans le tube de protection (8), élément qui est solidement relié au tube de protection (8) et qui étaie le stator de la pompe à vis sans fin excentrique (12), à son extrémité de longueur tournée vers le moteur dans une direction axiale et le fixe dans le tube de protection (8) en direction radiale.
  2. Pompe à moteur submersible selon la revendication 1, dans laquelle le tube de protection (8) est relié au boítier de moteur (5) sur une première extrémité et à une tête de pompe (34) sur une deuxième extrémité.
  3. Pompe à moteur submersible selon la revendication 1 ou 2, dans laquelle un deuxième élément d'appui (28) est aménagé dans la zone d'une deuxième extrémité de longueur du stator, ledit élément fixant le stator dans le tube de protection (8) en direction radiale.
  4. Pompe à moteur submersible selon l'une quelconque des revendications précédentes, dans laquelle le stator présente un boítier de stator de préférence cylindrique circulaire (18) et une couche d'élastomère (20) disposée sur la paroi interne du boítier de stator (18), la couche d'élastomère (20) s'étendant sur au moins une première extrémité de longueur du boítier du stator (18) par-dessus son extrémité de longueur.
  5. Pompe à moteur submersible selon la revendication 4, dans laquelle la couche d'élastomère (20) s'étend au moins sur la première extrémité de longueur du boítier du stator (18), de manière radiale sur une circonférence interne du boítier de stator (18) vers l'extérieur.
  6. Pompe à moteur submersible selon l'une quelconque des revendication précédentes, dans laquelle la deuxième extrémité de longueur du stator s'appuie sur la tête de pompe (34) en direction axiale.
  7. Pompe à moteur submersible selon l'une quelconque des revendications précédentes, dans laquelle, sur la première et/ou la deuxième extrémité de longueur du stator, sur une surface externe du stator, est formé au moins un épaulement (26,32), qui s'engage sur le premier (22) ou le deuxième (28) élément d'appui.
  8. Pompe à moteur submersible selon l'une quelconque des revendications précédentes, dans laquelle le tube de protection (8), le boítier de moteur (5) et, de préférence, la tête de pompe (34) présentent en section transversale sensiblement les mêmes dimensions extérieures.
EP20010125851 2001-10-30 2001-10-30 Pompe à moteur submersible Expired - Lifetime EP1308624B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20010125851 EP1308624B1 (fr) 2001-10-30 2001-10-30 Pompe à moteur submersible
DE50108332T DE50108332D1 (de) 2001-10-30 2001-10-30 Tauchmotorpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20010125851 EP1308624B1 (fr) 2001-10-30 2001-10-30 Pompe à moteur submersible

Publications (2)

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

Family

ID=8179114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010125851 Expired - Lifetime EP1308624B1 (fr) 2001-10-30 2001-10-30 Pompe à moteur submersible

Country Status (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464630A (zh) * 2016-01-04 2016-04-06 山东润发石油设备科技有限公司 大扭矩潜油电机直驱螺杆泵
EP3825552A1 (fr) 2019-11-22 2021-05-26 Grundfos Holding A/S Pompe à vis excentrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2118489B1 (fr) 2007-03-01 2016-07-13 Hero Europe S.r.l. Pompe à vis unique de type cartouche et machine à doser équipée d'une telle pompe

Family Cites Families (8)

* 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 (fr) * 1976-11-24 1978-06-23 Mecanique Metallurgie Ste Gle Perfectionnements aux pompes a vis
FR2551804B1 (fr) * 1983-09-12 1988-02-05 Inst Francais Du Petrole Dispositif utilisable notamment pour le pompage d'un fluide tres visqueux et/ou contenant une proportion notable de gaz, particulierement pour la production de petrole
DE3820003A1 (de) * 1988-06-11 1989-12-21 Grundfos Int Tauchpumpenaggregat
DE9319138U1 (de) * 1993-12-08 1994-05-19 Meyer, Werner, 59889 Eslohe Druckerhöhungsgerät für flüssige bis zähflüssige Beförderungsstoffe mit einstellbarem Druckausgleichsmantel
DE19615171C1 (de) * 1996-04-17 1997-11-27 Guenther Boehler Gmbh Pumpe zur Entnahme von Flüssigkeitsproben
DE19827101A1 (de) * 1998-06-18 1999-12-23 Artemis Kautschuk Kunststoff Nach dem Moineau-Prinzip arbeitende Maschine für den Einsatz in Tiefbohrungen
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 (zh) * 2016-01-04 2016-04-06 山东润发石油设备科技有限公司 大扭矩潜油电机直驱螺杆泵
EP3825552A1 (fr) 2019-11-22 2021-05-26 Grundfos Holding A/S Pompe à vis excentrique
WO2021099502A1 (fr) 2019-11-22 2021-05-27 Grundfos Holding A/S Pompe à vis sans fin excentrique

Also Published As

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

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