EP1733147B1 - Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle - Google Patents
Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle Download PDFInfo
- Publication number
- EP1733147B1 EP1733147B1 EP04803161.1A EP04803161A EP1733147B1 EP 1733147 B1 EP1733147 B1 EP 1733147B1 EP 04803161 A EP04803161 A EP 04803161A EP 1733147 B1 EP1733147 B1 EP 1733147B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- stator according
- inner tube
- eccentric
- inner pipe
- 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 - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Die Erfindung betrifft einen Stator für eine Exzenterschneckenpumpe oder einen Exzenterschneckenmotor mit einem Stator, der ein Außenrohr mit einer Auskleidung aus Gummi oder einem gummiähnlichen Werkstoff und einen nach Art eines zwei- oder mehrgängigen Steilgewindes geformten Hohlraum zur Aufnahme eines starren, ebenfalls nach Art eines Steilgewindes geformten Rotors aufweist, wobei das Steilgewinde des Stators jeweils einen Gang mehr aufweist als das Steilgewinde des Rotors.The invention relates to a stator for a progressing cavity pump or an eccentric screw motor with a stator having an outer tube with a lining made of rubber or a rubber-like material and shaped like a two- or multi-pitch thread for receiving a rigid, also shaped like a coarse thread Rotor having the steep thread of the stator in each case one more gear than the coarse thread of the rotor.
Die Wirkungsweise von Exzenterschneckenpumpen und -motoren wird auch als Moineau-Prinzip bezeichnet. Aus der
Es gibt Kautschuk-Typen, wie HNBR, Fluor-Kautschuke oder Silikon-Kautschuke, die bei Temperaturen von 160° C und höher funktionsfähig bleiben, jedoch ist auch bei diesen Kautschuken die Gummi-Metallverbindung problematisch, die im Dauereinsatz zerstört werden kann.There are rubber types, such as HNBR, fluorinated rubbers or silicone rubbers, which remain functional at temperatures of 160 ° C and higher, but even with these rubbers, the rubber-metal compound is problematic, which can be destroyed in continuous use.
In der
Aufgabe der vorliegenden Erfindung ist es, einen weiteren Stator zur Verfügung zu stellen, der auch unter Bedingungen funktionsfähig bleibt, unter denen die fest haftende Bindung zwischen der Auskleidung und dem Außenrohr, z. B. durch chemische Einflüsse oder hohe Temperaturen, zerstört werden würde.The object of the present invention is to provide a further stator which remains functional even under conditions under which the firmly adhering bond between the lining and the outer tube, for. B. by chemical influences or high temperatures, would be destroyed.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in der Auskleidung ein mit Durchbrechungen versehenes Innenrohr angeordnet ist.This object is achieved in that in the lining provided with openings inner tube is arranged.
Das Elastomermaterial der Auskleidung verkrallt sich mit dem Innenrohr, indem es die Durchbrechungen durchdringt. Somit kommt eine formschlüssige Verbindung zwischen den einzelnen Teilen des Stators zustande, die weit besser geeignet ist, den beschriebenen Belastungen standzuhalten, als eine chemische Gummi-Metall-Verbindung, etwa mittels eines Haftvermittlers.The elastomeric material of the liner engages the inner tube by penetrating the apertures. Thus, a positive connection between the individual parts of the stator is achieved, which is far better suited to withstand the described loads, as a chemical rubber-metal compound, such as by means of a bonding agent.
Nach einer vorteilhaften Ausführung der Erfindung sind zwischen Außenrohr und Innenrohr Abstandsleisten angeordnet. Hierbei kann das Elastomermaterial der Auskleidung nicht nur die Durchbrechungen des Innenrohrs durchdringen. Es kann auch, zumindest im Bereich zwischen den Abstandsleisten, das Innenrohr umschließen und hat in diesen Bereichen einen flächigen Kontakt zum Außenrohr.According to an advantageous embodiment of the invention, spacer strips are arranged between outer tube and inner tube. In this case, the elastomer material of the lining can penetrate not only the openings of the inner tube. It can also, at least in the area between the Spacer strips, enclose the inner tube and has in these areas a flat contact with the outer tube.
Das Innenrohr kann mit dem Außenrohr verbunden werden, z. B. durch Verschweißungen an den Stirnseiten oder an Bohrungen, die das Außenrohr durchsetzen.The inner tube can be connected to the outer tube, z. B. by welding on the front sides or holes that pass through the outer tube.
Durch die Abstandsleisten wird eine besonders feste und sichere Verbindung zwischen den Teilen des Stators erreicht, ohne den Aufwand bei der Fertigung des Stators und bezüglich der verwendeten Komponenten nennenswert zu erhöhen. Der Stator wird üblicherweise so hergestellt, dass das Elastomermaterial, das die Auskleidung bilden soll, durch Spritzen in das Außenrohr eingebracht wird, wobei das Innenrohr bereits im Außenrohr angeordnet ist. Die Abstandsleisten verhindern dabei, dass das Innenrohr durch den Spritzdruck zum Außenrohr hin gedrängt wird. Sie bewirken somit, dass zwischen Außenrohr und Innenrohr ausreichend Raum verbleibt, den das Elastomermaterial ausfüllt, das durch die Durchbrechungen im Innenraum hindurch tritt, wodurch Hinterschneidungen entstehen, die für eine sehr gute formschlüssige Verbindung mit dem Innenrohr sorgen.The spacer strips a particularly firm and secure connection between the parts of the stator is achieved without increasing the cost of manufacturing the stator and with respect to the components used significantly. The stator is usually manufactured so that the elastomeric material which is to form the lining is introduced by spraying into the outer tube, wherein the inner tube is already arranged in the outer tube. The spacer bars prevent the inner tube from being pushed towards the outer tube by the injection pressure. They thus cause sufficient space remains between outer tube and inner tube, which fills the elastomeric material, which passes through the openings in the interior, creating undercuts that provide a very good positive connection with the inner tube.
Die Abstandsleisten können nach einer möglichen Ausführungsform der Erfindung gerade, flache Profile sein, die sich in Richtung der Längsachse des Stators und praktisch über den größten Teil seiner Länge erstrecken, wobei mehrere derartige Abstandsleisten über den Umfang des Innenrohres verteilt angeordnet sind.The spacer bars may, according to a possible embodiment of the invention, be straight, flat profiles which extend in the direction of the longitudinal axis of the stator and practically over most of its length, several such spacer bars being distributed over the circumference of the inner tube.
Nach einer anderen Ausführungsmöglichkeit der Erfindung können die Abstandsleisten ringförmig sein und den Umfang des Innenrohres umschließen, wobei an einem Stator mehrere derartige Ringe in Längsrichtung voneinander beabstandet verteilt angeordnet sein können.According to another embodiment of the invention can the spacer strips be annular and enclose the circumference of the inner tube, wherein a plurality of such rings can be arranged distributed in the longitudinal direction spaced from each other on a stator.
Nach einer weiteren Ausführungsform der Erfindung kann die Abstandsleiste wendelförmig sein. Diese Ausführungsform hat den Vorteil, dass für einen bereits eine einzige derartige Abstandsleiste ausreichend sein kann.According to a further embodiment of the invention, the spacer bar may be helical. This embodiment has the advantage that a single such spacer strip can already be sufficient for one.
Eine ähnlich innige Verkrallung zwischen dem Elstomermaterial der Auskleidung und dem Innenrohr lässt sich auch durch eine weitere Ausführungsform der Erfindung erzielen, indem das Durchbrechungen aufweisende Innenrohr wellenförmig ausgestaltet ist, wobei es gleichgültig ist, ob die Wellenform in axialer oder radialer Richtung des Innenrohres gewählt wird.A similar intimate clawing between the Elstomermaterial the liner and the inner tube can also be achieved by a further embodiment of the invention by the perforations having inner tube is designed wave-shaped, it does not matter whether the waveform is selected in the axial or radial direction of the inner tube.
Die Wahl einer bestimmten Form der Abstandsleiste/n im Querschnitt ist nicht begrenzt. Es können z. B. runde, quadratische und/oder rechteckige Abstandsleisten zum Einsatz kommen.The choice of a particular shape of the spacer bar / s in cross section is not limited. It can z. B. round, square and / or rectangular spacer strips are used.
Weitere Ausführungsformen der Erfindung sind. in den Unteransprüchen enthalten.Further embodiments of the invention are. included in the subclaims.
Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der Ausführungsbeispiele der Erfindung dargestellt sind.Further details of the invention will be explained with reference to the drawing, are shown in the embodiments of the invention.
Es zeigen:
- Fig. 1
- einen Querschnitt durch einen erfindungsgemäßen Stator,
- Fig. 2
- eine andere Ausführungsform des erfindungsgemäßen Stators im Querschnitt,
- Fig. 3
- einen Abschnitt der Außen- und Innenrohre eines Stators gemäß
Fig. 2 in perspektivischer Darstellung mit teilweise freigelegten Schichten, - Fig. 4
- die perspektivische Darstellung einer weiteren Ausführungsform mit teilweise freigelegten Schichten,
- Fig. 5
- die perspektivische Darstellung einer weiteren erfindungsgemäßen Ausführungsform mit teilweise freigelegten Schichten,
- Fig. 6
- einen Längsschnitt durch das Endstück eines Stators gemäß
Fig. 2 , - Fig. 7
- einen Längsschnitt durch das Endstück eines Stators gemäß
Fig. 2 in gegenüberFig. 6 abgewandelter Ausführung, - Fig. 8
- eine weitere Ausführungsform eines erfindungsgemäßen Stators im Querschnitt,
- Fig. 9
- eine weitere Ausführungsform eines erfindungsgemäßen Stators im Längsschnitt und
- Fig. 10
- eine weitere Ausführungsform eines Stators.
- Fig. 1
- a cross section through a stator according to the invention,
- Fig. 2
- another embodiment of the stator according to the invention in cross section,
- Fig. 3
- a portion of the outer and inner tubes of a stator according to
Fig. 2 in perspective with partially exposed layers, - Fig. 4
- the perspective view of another embodiment with partially exposed layers,
- Fig. 5
- the perspective view of another embodiment of the invention with partially exposed layers,
- Fig. 6
- a longitudinal section through the end of a stator according to
Fig. 2 . - Fig. 7
- a longitudinal section through the end of a stator according to
Fig. 2 in oppositeFig. 6 modified version, - Fig. 8
- a further embodiment of a stator according to the invention in cross-section,
- Fig. 9
- a further embodiment of a stator according to the invention in longitudinal section and
- Fig. 10
- another embodiment of a stator.
Der in
Wichtig ist nun, dass in dem Außenrohr 1 ein Innenrohr 4 angeordnet ist, das eine Perforierung bzw. eine Vielzahl von Durchbrechungen 5 aufweist und das mit dem Außenrohr 1 fest verbunden ist. Die Durchbrechungen 5 werden von dem Material der Auskleidung 2 ausgefüllt. Dadurch kommt es zu einer formschlüssigen Verbindung zwischen Außenrohr 1 und Auskleidung 2, die die Auskleidung 2 sowohl gegen Verschiebung in Längsrichtung als auch gegen Verdrehen um ihre Achse sichert. Eine durch Vulkanisation oder Kleben hergestellte Verbindung zwischen Außenrohr und Auskleidung kann entfallen.It is now important that in the
Der Stator gemäß den
Das Innenrohr 4 kann entweder aus einem Durchbrechungen aufweisendem Rohr bestehen oder aus einem handelsüblichen Lochblech gebildet werden, das zylindrisch gebogen wird. Zur Herstellung eines erfindungsgemäßen Stators werden das Innenrohr 4 und die Abstandsleisten 6 in das Außenrohr 1 geschoben. Anschließend kann durch Spritzen das Gummimaterial der Auskleidung 2 eingebracht werden.The
In den
In den
Alternativ oder zusätzlich kann die Verbindung durch punktförmige Verschweißungen 9 erfolgen, die an verschiedenen, über den Umfang und die Längenerstreckung des Stators verteilten Stellen in Bohrungen angebracht sind, die das Außenrohr 1 und die Abstandsleiste 6 durchsetzen (
Nach einer weiteren, hier nicht gesondert dargestellten Ausführungsform der Erfindung können das Außenrohr 1 und das Innenrohr 4 durch eine Presspassung miteinander verbunden sein. Selbstverständlich können die hier erwähnten Verbindungstechniken auch dann zum Einsatz kommen, wenn lediglich ein Innenrohr verwendet wird, also ohne die Abstandsleisten 6, 6' oder 6'', wie in
Nach einer weiteren, hier in
Auf die Abstandsleiste/n kann etwa auch dann verzichtet werden, wenn das Innenrohr wellenförmig ausgestaltet ist. In
Hier setzt sich die Wellenform des Innenrohres 4 in Umfangsrichtung fort, während
Claims (10)
- Stator for an eccentric spiral pump or an eccentric worm motor having a stator which comprises an outer pipe (1) with a lining (2) made of rubber or a rubber-like material and a hollow (3) formed in the manner of a dual- or multi-start coarse thread for accommodating a rigid rotor also formed in the manner of a coarse thread, wherein the coarse thread of the stator in each case comprises one start more than the coarse thread of the rotor, characterised in that an inner pipe (4) provided with through holes (5) is arranged in the lining (2).
- Stator according to Claim 1, characterised in that distance strips (6, 6', 6") are arranged between the inner pipe (4) and the outer pipe (1).
- Stator according to Claim 2, characterised in that the distance strips (6) is/are arranged substantially parallel to the longitudinal axis of the stator.
- Stator according to Claim 2, characterised in that one or a plurality of distance strips (6') is/are arranged in a helical manner around the circumference of the inner pipe (4) and running in the direction of its longitudinal axis.
- Stator according to Claim 2, characterised in that the distance strips (6") run substantially in the circumferential direction of the stator and enclose the inner pipe (4) in a circular manner.
- Stator according to Claims 2 to 5, characterised in that the distance strips (6, 6', 6") are made of plastic, elastomer and/or metal.
- Stator according to Claim 1, characterised in that the inner pipe (4) is designed in an undulating manner.
- Stator according to any one of the preceding claims, characterised in that the inner pipe (4) is welded on its front sides to the outer pipe (1).
- Stator according to any one of the preceding claims, characterised in that the outer pipe (1) and the inner pipe (4) are connected to each other by punctiform welds (9), wherein the welds (9) are made into bores pushing through the outer pipe (1).
- Stator according to any one of the preceding claims, characterised in that the outer pipe (1) comprises through holes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/725,967 US7316548B2 (en) | 2003-11-17 | 2003-11-17 | Stator for an eccentric screw pump or an eccentric worm motor operating on the Moineau principle |
PCT/EP2004/013029 WO2005047701A2 (en) | 2003-11-17 | 2004-11-17 | Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1733147A2 EP1733147A2 (en) | 2006-12-20 |
EP1733147B1 true EP1733147B1 (en) | 2016-12-28 |
Family
ID=34574704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04803161.1A Expired - Fee Related EP1733147B1 (en) | 2003-11-17 | 2004-11-17 | Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle |
Country Status (5)
Country | Link |
---|---|
US (1) | US7316548B2 (en) |
EP (1) | EP1733147B1 (en) |
BR (1) | BRPI0416634A (en) |
CA (1) | CA2473282C (en) |
WO (1) | WO2005047701A2 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005308210A (en) * | 2004-03-26 | 2005-11-04 | Hitachi Metals Ltd | Flexible pipe |
US7407372B2 (en) | 2004-05-14 | 2008-08-05 | Robbins & Myers Energy Systems L.P. | Progressing cavity pump or motor |
US9163629B2 (en) | 2006-07-31 | 2015-10-20 | Schlumberger Technology Corporation | Controlled thickness resilient material lined stator and method of forming |
US7739792B2 (en) * | 2006-07-31 | 2010-06-22 | Schlumberger Technology Corporation | Method of forming controlled thickness resilient material lined stator |
BR112012003882A2 (en) | 2009-08-21 | 2016-03-29 | Titeflex Corp | power dissipator pipe, power dissipator pipe manufacturing methods, installation method and sealing devices for a power dissipator |
GB2481226A (en) * | 2010-06-16 | 2011-12-21 | Nat Oilwell Varco Lp | Stator for a progressive cavity (PC) pump or motor |
GB2497225B (en) | 2010-08-16 | 2017-10-11 | Nat Oilwell Varco Lp | Reinforced stators and fabrication methods |
US8944789B2 (en) | 2010-12-10 | 2015-02-03 | National Oilwell Varco, L.P. | Enhanced elastomeric stator insert via reinforcing agent distribution and orientation |
GB2499613B (en) | 2012-02-22 | 2017-11-01 | Nat Oilwell Varco Lp | Stator for progressive cavity pump/motor |
DE102012112044B4 (en) * | 2012-05-04 | 2015-10-08 | Netzsch Pumpen & Systeme Gmbh | Self-fixing stator housing |
DE102012012076A1 (en) | 2012-06-13 | 2013-12-19 | Arnold Jäger Holding GmbH | Stator of cavity pump used in food industry, has perforated plate pipe arranged between outer side of stator main portion and inner side of rotor space and made of rubber to surround sides of stator main portion |
RU2516094C2 (en) * | 2012-08-06 | 2014-05-20 | Открытое акционерное общество Научно-производственное объединение "Искра" | Helical rotor pump |
WO2014138068A1 (en) * | 2013-03-05 | 2014-09-12 | Schlumberger Canada Limited | Method and apparatus to manufacture a progressive cavity motor or pump |
US9541225B2 (en) | 2013-05-09 | 2017-01-10 | Titeflex Corporation | Bushings, sealing devices, tubing, and methods of installing tubing |
EP3107863A4 (en) | 2014-02-18 | 2017-10-04 | Reme Technologies, LLC | Graphene enhanced elastomeric stator |
CA2940158C (en) | 2014-02-18 | 2023-01-17 | Vert Rotors Uk Limited | Rotary positive-displacement machine |
CN106685152B (en) * | 2015-11-10 | 2019-03-12 | 耐驰(兰州)泵业有限公司 | Manufacture for eccentrie helical totorpump can hydraulic adjustment stator method |
RU2646664C1 (en) * | 2017-06-22 | 2018-03-06 | Михаил Валерьевич Шардаков | Stainer of screw hydraulic, device and method of its inner eye casing manufacture |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2250263C3 (en) * | 1972-10-13 | 1978-09-28 | Gummi-Jaeger Kg Gmbh & Cie, 3000 Hannover | Adjustable stator for eccentric screw pumps |
DE2541779A1 (en) * | 1975-09-19 | 1977-03-31 | Allweiler Ag | Stator with prefabricated lining for eccentric screw pump - preventing internal stress due to shrinkage of resilient material |
US4313717A (en) * | 1979-10-04 | 1982-02-02 | Kopecky Eugene F | Adjustable pressure extrusion pump |
DE3119568A1 (en) * | 1981-05-16 | 1982-12-02 | Big Dutchman (International) AG, 8090 Wezep | Eccentric worm screw pump |
DE3322095A1 (en) * | 1983-06-20 | 1984-12-20 | Gummi-Jäger KG GmbH & Cie, 3000 Hannover | Stator for excentric worm screw pumps |
JPS61180512A (en) * | 1986-01-21 | 1986-08-13 | 日立電線株式会社 | Construction of directly cooled type power cable line |
US5171138A (en) * | 1990-12-20 | 1992-12-15 | Drilex Systems, Inc. | Composite stator construction for downhole drilling motors |
DE4134853C1 (en) * | 1991-05-22 | 1992-11-12 | Netzsch-Mohnopumpen Gmbh, 8264 Waldkraiburg, De | |
US5171139A (en) * | 1991-11-26 | 1992-12-15 | Smith International, Inc. | Moineau motor with conduits through the stator |
DE4403598A1 (en) * | 1994-02-07 | 1995-08-10 | Arnold Jaeger | Eccentric screw pump for supplying mortar |
DE19801020A1 (en) * | 1998-01-14 | 1999-07-22 | Artemis Kautschuk Kunststoff | Elastomer stator for an eccentric worm pump |
DE19842754C2 (en) * | 1998-09-18 | 2001-04-26 | Seepex Seeberger Gmbh & Co | Eccentric screw pump |
-
2003
- 2003-11-17 US US10/725,967 patent/US7316548B2/en not_active Expired - Fee Related
-
2004
- 2004-07-08 CA CA2473282A patent/CA2473282C/en not_active Expired - Fee Related
- 2004-11-17 EP EP04803161.1A patent/EP1733147B1/en not_active Expired - Fee Related
- 2004-11-17 BR BRPI0416634-5A patent/BRPI0416634A/en not_active Application Discontinuation
- 2004-11-17 WO PCT/EP2004/013029 patent/WO2005047701A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2005047701A3 (en) | 2005-07-07 |
US7316548B2 (en) | 2008-01-08 |
CA2473282C (en) | 2010-04-13 |
WO2005047701A2 (en) | 2005-05-26 |
EP1733147A2 (en) | 2006-12-20 |
BRPI0416634A (en) | 2007-01-16 |
US20050106004A1 (en) | 2005-05-19 |
CA2473282A1 (en) | 2005-05-17 |
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