EP2532833A1 - Conveying element for an eccentric screw pump and eccentric screw pump - Google Patents

Conveying element for an eccentric screw pump and eccentric screw pump Download PDF

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Publication number
EP2532833A1
EP2532833A1 EP11169407A EP11169407A EP2532833A1 EP 2532833 A1 EP2532833 A1 EP 2532833A1 EP 11169407 A EP11169407 A EP 11169407A EP 11169407 A EP11169407 A EP 11169407A EP 2532833 A1 EP2532833 A1 EP 2532833A1
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EP
European Patent Office
Prior art keywords
screw thread
delivery volume
screw
conveying element
providing
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.)
Granted
Application number
EP11169407A
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German (de)
French (fr)
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EP2532833B1 (en
Inventor
Vinzenz Gantenhammer
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.)
Viscotec Pumpen und Dosiertechnik GmbH
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Viscotec Pumpen und Dosiertechnik GmbH
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Priority to EP11169407.1A priority Critical patent/EP2532833B1/en
Publication of EP2532833A1 publication Critical patent/EP2532833A1/en
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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
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor

Definitions

  • the invention relates to a conveying element for an eccentric screw pump.
  • the conveying element is for example a stator or a rotor of the eccentric screw pump.
  • the invention relates to an eccentric screw pump and a method for producing a conveyor element for an eccentric screw pump.
  • the technical field of the invention relates to the metering of viscous media, such as fluids or liquids, such as adhesives or sealants, paints, varnishes, solvents, suspensions, viscous raw materials, emulsions, pastes, food pastes, oils or fats.
  • viscous media such as fluids or liquids, such as adhesives or sealants, paints, varnishes, solvents, suspensions, viscous raw materials, emulsions, pastes, food pastes, oils or fats.
  • a high pressure level for the feed of the eccentric screw pump is usually necessary. This is achieved for example by pre-pressure pumps, pressure vessel systems, pressure accumulator or pressure and volume storage.
  • the DE 20 2009 002 823 U1 shows an eccentric screw pump for conveying viscous, highly viscous and abrasive media.
  • the eccentric screw pump In its longitudinal direction, the eccentric screw pump has at least one conical, helically wound, at least catchy red with a slope, with at least one eccentricity and at least one Cross-section which is rotatably arranged in a single or multi-start conical stator.
  • the stated object is achieved by a conveyor element for an eccentric screw pump with the features of claim 1, by a progressive cavity pump having the features of claim 14 and by a method for producing a conveyor element for an eccentric screw pump having the features of claim 15.
  • a conveyor element for an eccentric screw pump for conveying a fluid which has a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume, wherein the first delivery volume is greater than the second delivery volume.
  • an eccentric screw pump for conveying a fluid which has a stator with N + 1 threads and an arranged in the stator rotor with N threads.
  • the stator has a first female screw thread for providing a first delivery volume and a second female screw thread for providing a second delivery volume.
  • the rotor has a first male screw thread for providing the first delivery volume and a second male screw thread for providing the second delivery volume. The first delivery volume is greater than the second delivery volume.
  • the rotor and the stator can be brought into an operative connection for conveying the fluid out of a container.
  • the eccentric screw pump is based in particular on the Moineau principle.
  • a method for producing a conveyor element for an eccentric screw pump for conveying a fluid in which a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume are prepared such that the first delivery volume is greater than the second delivery volume is.
  • a container removal system with a container for receiving the fluid to be delivered and an eccentric screw pump as described above for removing the fluid to be delivered is proposed.
  • the container removal system can be used, for example, for barrel removal or as a degassing system with vacuum technology.
  • the first screw thread can act as a booster for the second screw thread.
  • the conveying element in particular the second screw thread of the conveying element, supplied with sufficient material and form, so that cavitation states can occur in any portion of the dosing process.
  • a very stable dosing process is provided according to the invention.
  • the accuracy of the dosage is increased since parameter deviations at start and stop of the dosing process are reduced or avoided.
  • feed systems can be simplified and the pressure level can be reduced by the conveyor element according to the invention.
  • the regulatory burden can be minimized or completely eliminated.
  • the conveying element according to the invention ensures high efficiency, in particular high metering stability, even under poor feed conditions.
  • the first delivery volume is 1.3 to 4 times greater than the second delivery volume.
  • the first delivery volume is 1.5 times to 3 times greater than the second delivery volume.
  • the conveying element is designed as a catchy or multi-start rotor of the eccentric screw pump, wherein the first screw thread and the second screw thread are each formed as an external screw thread.
  • the conveying element is designed as a stator of the eccentric screw pump, wherein the first screw thread and the second screw thread are each formed as a multi-course internal screw thread.
  • first screw thread and the second screw thread are formed as an integral part.
  • eccentricities of the first and second screw threads are the same and the diameters of the first and second screw threads are different.
  • the ratio between the diameter of the first screw thread and the diameter of the second screw thread is in a range between 1.3 and 4, preferably between 1.5 and 3.
  • eccentricities of the first and second screw threads are the same and the pitches of the first and second screw threads are different.
  • the ratio between the pitch of the first screw thread and the pitch of the second screw thread is in a range of 1.3 to 4, preferably 1.5 to 3.
  • the eccentricities of the first and second screw threads are the same, the diameters of the first and second screw threads differ, and the pitches of the first and second screw threads are different.
  • d1 is the diameter of the first screw thread
  • d2 is the diameter of the second screw thread
  • s1 is the pitch of the first screw thread
  • s2 is the pitch of the second screw thread
  • ā‡ being in a range of 1.3 to 4, preferably 1.5 to 3, lies.
  • first screw thread and the second screw thread are made of different materials.
  • the first screw thread is Teflon and the second screw thread is an elastomer.
  • the fluid or viscous medium has a viscosity of 0.1 to 10 7 mPas, preferably from 10 1 to 10 6 mPas, particularly preferably from 10 3 to 10 4 mPas.
  • Fig. 1 a view of an embodiment of a catchy rotor 1 according to the invention is shown.
  • the catchy rotor 1 is adapted to be in operative connection with a double-flighted stator Progressing cavity pump To dose and convey fluid (see Fig. 3 ).
  • the rotor 1 In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2.
  • the first delivery volume v1 is greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2.
  • the first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.
  • the first screw thread 2 and the second screw thread 3 are in particular formed as a one-piece part. However, it is also possible to produce the first screw thread 2 and the second screw thread 3 as two separate parts and to add in a subsequent joining process.
  • Fig. 2 shows a sectional view of an embodiment of a double-flighted stator according to the invention 4.
  • the double-flighted stator 4 may be connected to the rotor 1 of Fig. 1 be brought into an operative connection (see Fig. 3 ).
  • the double-flighted stator 4 of the Fig. 2 has in a first area B1 a first screw thread 5 for providing the first delivery volume v1.
  • the stator 4 has a second screw thread 6 for providing the second Delivery volume v2.
  • the first screw thread 5 and the second screw thread 6 are each formed as a double-threaded thread.
  • FIG. 3 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a catchy rotor 1 after Fig. 1 and a double-flighted stator 4 Fig. 2 , The double-flighted stator 4 is shown cut.
  • the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged.
  • the second outer screw thread 3 of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.
  • Fig. 4 is a view of an embodiment of a double-flighted rotor 1 according to the invention shown.
  • the double-flighted rotor 1 is suitable for metering and delivering fluid in operative connection with a three-speed stator of an eccentric screw pump (see Fig. 6 ).
  • the rotor 1 In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2.
  • the first delivery volume v1 is greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2.
  • the first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.
  • the first screw thread 2 and the second screw thread 3 are in particular formed as a one-piece part. However, it is also possible to manufacture the first screw thread 2 and the second screw thread 3 as two separate parts and to add them in a subsequent joining process.
  • the eccentricities e1, e2 of the first and second screw threads 2, 3 are the same.
  • the diameters d1, d2 of the first and second screw threads 2, 3 are different.
  • the slopes s1, s2 of the first and second screw threads 2, 3 are different.
  • Fig. 5 shows a sectional view of an embodiment of a three-speed stator according to the invention 4.
  • the three-speed stator 4 may be connected to the rotor 1 of Fig. 4 be brought into an operative connection (see Fig. 6 ).
  • the three-speed stator 4 of FIG. 5 has in the first area B1 a first screw thread 5 for providing the first delivery volume v1.
  • the stator 4 has a second screw thread 6 for providing the second delivery volume v2.
  • the first screw thread 5 and the second screw thread 6 are each formed as a three-start internal screw thread.
  • FIG. 6 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a two-speed rotor 1 after Fig. 4 and a three-speed stator 4 after Fig. 5 ,
  • the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged.
  • the second outer screw thread of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.
  • Fig. 7 is a schematic flow diagram of an embodiment of a method for producing a conveyor element for an eccentric screw pump shown.
  • a first screw thread for providing a first delivery volume is produced in a first region of the delivery element.
  • a second screw thread for providing a second delivery volume is produced in a second region of the delivery element, wherein the first delivery volume is greater than the second delivery volume.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The pump has a stator with internal screw threads for providing flow volumes (v1, v2), and a rotor (1) arranged in the stator. The rotor has thread pitches with an external screw thread (2) for providing one flow volume. Another external screw thread (3) for providing another flow volume is connected with the external screw thread along longitudinal direction, where the former flow volume is preferably 1.5 to 3 times higher than the latter flow volume. The internal and external screw threads are formed as integral parts.

Description

Die Erfindung betrifft ein Fƶrderelement fĆ¼r eine Exzenterschneckenpumpe. Das Fƶrderelement ist beispielsweise ein Stator oder ein Rotor der Exzenterschneckenpumpe. Ferner betrifft die Erfindung eine Exzenterschneckenpumpe und ein Verfahren zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe.The invention relates to a conveying element for an eccentric screw pump. The conveying element is for example a stator or a rotor of the eccentric screw pump. Furthermore, the invention relates to an eccentric screw pump and a method for producing a conveyor element for an eccentric screw pump.

Das technische Gebiet der Erfindung betrifft die Dosierung von viskosen Medien, wie Fluiden oder FlĆ¼ssigkeiten, wie beispielsweise Kleb- oder Dichtstoffen, Farben, Lacken, Lƶsemitteln, Suspensionen, viskosen Rohstoffen, Emulsionen, Pasten, Lebensmittel-Pasten, Ɩlen oder Fetten.The technical field of the invention relates to the metering of viscous media, such as fluids or liquids, such as adhesives or sealants, paints, varnishes, solvents, suspensions, viscous raw materials, emulsions, pastes, food pastes, oils or fats.

Bei vielen Industrieprozessen, aber auch im Handel und im Gewerbe, werden solche viskose Medien Ć¼ber Exzenterschneckenpumpen gefƶrdert und dosiert.In many industrial processes, but also in commerce and industry, such viscous media are conveyed and metered via progressing cavity pumps.

Bei der Fƶrderung und Dosierung von viskosen Medien, insbesondere hochviskosen Medien, ist herkƶmmlicherweise hƤufig ein hohes Druckniveau fĆ¼r die Beschickung der Exzenterschneckenpumpe notwendig. Dies wird beispielsweise durch Vordruckpumpen, DruckbehƤltersysteme, Druckspeicher oder Druck- und Volumenspeicher erreicht.In the promotion and metering of viscous media, especially high-viscosity media, conventionally a high pressure level for the feed of the eccentric screw pump is usually necessary. This is achieved for example by pre-pressure pumps, pressure vessel systems, pressure accumulator or pressure and volume storage.

Im Startmodus oder im Anfahrmodus kann es allerdings zu teilweise hohen DruckabfƤllen kommen. Zudem ist herkƶmmlicherweise eine aufwƤndige Druckregelung nƶtig.In start mode or in start-up mode, however, sometimes high pressure drops can occur. In addition, conventionally, a complex pressure control is necessary.

Die DE 20 2009 002 823 U1 zeigt eine Exzenterschneckenpumpe zur Fƶrderung von dickflĆ¼ssigen, hochviskosen und abrasiven Medien. In ihrer LƤngsrichtung hat die Exzenterschneckenpumpe mindestens einen konischen, schraubenfƶrmig gewundenen, mindestens eingƤngigen Roter mit einer Steigung, mit mindestens einer ExzentrizitƤt und mit mindestens einem Querschnitt, der in einem ein- oder mehrgƤngigen konischen Stator drehbar angeordnet ist.The DE 20 2009 002 823 U1 shows an eccentric screw pump for conveying viscous, highly viscous and abrasive media. In its longitudinal direction, the eccentric screw pump has at least one conical, helically wound, at least catchy red with a slope, with at least one eccentricity and at least one Cross-section which is rotatably arranged in a single or multi-start conical stator.

Demnach ist es eine Aufgabe der vorliegenden Erfindung, eine verbesserte Fƶrderung von Fluiden durch eine Exzenterschneckenpumpe zu schaffen.Accordingly, it is an object of the present invention to provide improved delivery of fluids through an eccentric screw pump.

Die gestellte Aufgabe wird durch ein Fƶrderelement fĆ¼r eine Exzenterschneckenpumpe mit den Merkmalen des Anspruchs 1, durch eine Exzenterschneckenpumpe mit den Merkmalen des Anspruchs 14 und durch ein Verfahren zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe mit den Merkmalen des Anspruchs 15 gelƶst.The stated object is achieved by a conveyor element for an eccentric screw pump with the features of claim 1, by a progressive cavity pump having the features of claim 14 and by a method for producing a conveyor element for an eccentric screw pump having the features of claim 15.

DemgemƤƟ wird ein Fƶrderelement fĆ¼r eine Exzenterschneckenpumpe zum Fƶrdern eines Fluids vorgeschlagen, welche ein erstes Schraubengewinde zum Bereitstellen eines ersten Fƶrdervolumens und ein zweites Schraubengewinde zum Bereitstellen eines zweiten Fƶrdervolumens aufweist, wobei das erste Fƶrdervolumen grĆ¶ĆŸer als das zweite Fƶrdervolumen ist.Accordingly, a conveyor element for an eccentric screw pump for conveying a fluid is proposed, which has a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume, wherein the first delivery volume is greater than the second delivery volume.

Ferner wird eine Exzenterschneckenpumpe zum Fƶrdern eines Fluids vorgeschlagen, welche eine Stator mit N+1 GewindegƤngen und einen in dem Stator angeordneten Rotor mit N GewindegƤngen aufweist. Der Stator hat ein erstes Innenschraubengewinde zum Bereitstellen eines ersten Fƶrdervolumens und ein zweites Innenschraubengewinde zum Bereitstellen eines zweiten Fƶrdervolumens. Der Rotor hat ein erstes AuƟenschraubengewinde zum Bereitstellen des ersten Fƶrdervolumens und ein zweites AuƟenschraubengewinde zum Bereitstellen des zweiten Fƶrdervolumens. Das erste Fƶrdervolumen ist grĆ¶ĆŸer als das zweite Fƶrdervolumen.Furthermore, an eccentric screw pump for conveying a fluid is proposed, which has a stator with N + 1 threads and an arranged in the stator rotor with N threads. The stator has a first female screw thread for providing a first delivery volume and a second female screw thread for providing a second delivery volume. The rotor has a first male screw thread for providing the first delivery volume and a second male screw thread for providing the second delivery volume. The first delivery volume is greater than the second delivery volume.

Der Rotor und der Stator sind in eine Wirkverbindung zum Fƶrdern des Fluids aus einem BehƤlter bringbar. Die Exzenterschneckenpumpe basiert insbesondere auf dem Moineau-Prinzip.The rotor and the stator can be brought into an operative connection for conveying the fluid out of a container. The eccentric screw pump is based in particular on the Moineau principle.

Des Weiteren wird ein Verfahren zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe zum Fƶrdern eines Fluids vorgeschlagen, bei welchem ein erstes Schraubengewinde zum Bereitstellen eines ersten Fƶrdervolumens und ein zweites Schraubengewinde zum Bereitstellen eines zweiten Fƶrdervolumens derart hergestellt werden, dass das erste Fƶrdervolumen grĆ¶ĆŸer als das zweite Fƶrdervolumen ist.Furthermore, a method for producing a conveyor element for an eccentric screw pump for conveying a fluid is proposed, in which a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume are prepared such that the first delivery volume is greater than the second delivery volume is.

Des Weiteren wird ein BehƤlterentnahmesystem mit einem BehƤlter zur Aufnahme des zu fƶrdernden Fluids und einer wie oben beschriebenen Exzenterschneckenpumpe zur Entnahme des zu fƶrdernden Fluids vorgeschlagen. Das BehƤlterentnahmesystem ist beispielsweise zur Fassentnahme oder als Entgasungssystem mit Vakuumtechnik einsatzfƤhig.Furthermore, a container removal system with a container for receiving the fluid to be delivered and an eccentric screw pump as described above for removing the fluid to be delivered is proposed. The container removal system can be used, for example, for barrel removal or as a degassing system with vacuum technology.

Bei dem vorliegenden Fƶrderelement kann das erste Schraubengewinde als Booster fĆ¼r das zweite Schraubengewinde wirken. Somit ist das Fƶrderelement, insbesondere das zweite Schraubengewinde des Fƶrderelements, mit ausreichend Material und Vordruck versorgt, so dass in keinem Abschnitt des Dosierprozesses KavitationszustƤnde auftreten kƶnnen. Dadurch wird erfindungsgemƤƟ ein sehr stabiler Dosierprozess bereitgestellt. Des Weiteren wird die Genauigkeit der Dosierung erhƶht, da Parameterabweichungen bei Start und Stopp des Dosierprozesses vermindert bzw. vermieden werden. Ferner kƶnnen durch das erfindungsgemƤƟe Fƶrderelement Zufuhrsysteme vereinfacht werden und das Druckniveau gesenkt werden. Weiter kann der Regelungsaufwand minimiert werden bzw. ganz entfallen.In the present conveying element, the first screw thread can act as a booster for the second screw thread. Thus, the conveying element, in particular the second screw thread of the conveying element, supplied with sufficient material and form, so that cavitation states can occur in any portion of the dosing process. As a result, a very stable dosing process is provided according to the invention. Furthermore, the accuracy of the dosage is increased since parameter deviations at start and stop of the dosing process are reduced or avoided. Furthermore, feed systems can be simplified and the pressure level can be reduced by the conveyor element according to the invention. Next, the regulatory burden can be minimized or completely eliminated.

Das erfindungsgemƤƟe Fƶrderelement stellt einen hohen Wirkungsgrad, insbesondere hohe DosierstabilitƤt, auch bei schlechten Zulaufbedingungen sicher.The conveying element according to the invention ensures high efficiency, in particular high metering stability, even under poor feed conditions.

Vorteilhafte AusfĆ¼hrungsformen und Weiterbildungen der Erfindung ergeben sich aus den UnteransprĆ¼chen sowie der Beschreibung unter Bezugnahme auf die Zeichnungen.Advantageous embodiments and developments of the invention will become apparent from the dependent claims and the description with reference to the drawings.

Bei einer AusfĆ¼hrungsform ist das erste Fƶrdervolumen um das 1,3-fache bis 4-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen. Bevorzugt ist das erste Fƶrdervolumen um das 1,5-fache bis 3-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen.In one embodiment, the first delivery volume is 1.3 to 4 times greater than the second delivery volume. Preferably, the first delivery volume is 1.5 times to 3 times greater than the second delivery volume.

Bei einer weiteren AusfĆ¼hrungsform ist das Fƶrderelement als ein eingƤngiger oder mehrgƤngiger Rotor der Exzenterschneckenpumpe ausgebildet, wobei das erste Schraubengewinde und das zweite Schraubengewinde jeweils als ein AuƟenschraubengewinde ausgebildet sind.In a further embodiment, the conveying element is designed as a catchy or multi-start rotor of the eccentric screw pump, wherein the first screw thread and the second screw thread are each formed as an external screw thread.

Bei einer weiteren AusfĆ¼hrungsform ist das Fƶrderelement als ein Stator der Exzenterschneckenpumpe ausgebildet, wobei das erste Schraubengewinde und das zweite Schraubengewinde jeweils als ein mehrgƤngiges Innenschraubengewinde ausgebildet sind.In a further embodiment, the conveying element is designed as a stator of the eccentric screw pump, wherein the first screw thread and the second screw thread are each formed as a multi-course internal screw thread.

Bei einer weiteren AusfĆ¼hrungsform sind das erste Schraubengewinde und das zweite Schraubengewinde als ein einstĆ¼ckiges Teil ausgebildet.In a further embodiment, the first screw thread and the second screw thread are formed as an integral part.

Bei einer weiteren AusfĆ¼hrungsform sind die ExzentrizitƤten des ersten und zweiten Schraubengewindes gleich und die Durchmesser des ersten und zweiten Schraubengewindes unterschiedlich.In another embodiment, the eccentricities of the first and second screw threads are the same and the diameters of the first and second screw threads are different.

Bei einer weiteren AusfĆ¼hrungsform ist das VerhƤltnis zwischen dem Durchmesser des ersten Schraubengewindes und dem Durchmesser des zweiten Schraubengewindes in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3.In a further embodiment, the ratio between the diameter of the first screw thread and the diameter of the second screw thread is in a range between 1.3 and 4, preferably between 1.5 and 3.

Bei einer weiteren AusfĆ¼hrungsform sind die ExzentrizitƤten des ersten und zweiten Schraubengewindes gleich und die Steigungen des ersten und zweiten Schraubengewindes unterschiedlich.In another embodiment, the eccentricities of the first and second screw threads are the same and the pitches of the first and second screw threads are different.

Bei einer weiteren AusfĆ¼hrungsform ist das VerhƤltnis zwischen der Steigung des ersten Schraubengewindes und der Steigung des zweiten Schraubengewindes in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3.In another embodiment, the ratio between the pitch of the first screw thread and the pitch of the second screw thread is in a range of 1.3 to 4, preferably 1.5 to 3.

Bei einer weiteren AusfĆ¼hrungsform sind die ExzentrizitƤten des ersten und zweiten Schraubengewindes gleich, die Durchmesser des ersten und zweiten Schraubengewindes unterschiedlich und die Steigungen des ersten und zweiten Schraubengewindes unterschiedlich.In another embodiment, the eccentricities of the first and second screw threads are the same, the diameters of the first and second screw threads differ, and the pitches of the first and second screw threads are different.

Bei einer weiteren AusfĆ¼hrungsform ist d ā¢ 1 ā‹… s ā¢ 1 d ā¢ 2 ā‹… s ā¢ 2 > Ī±

Figure imgb0001
ist, wobei d1 den Durchmesser des ersten Schraubengewindes, d2 den Durchmesser des zweiten Schraubengewindes, s1 die Steigung des ersten Schraubengewindes und s2 die Steigung des zweiten Schraubengewindes bezeichnen, wobei Ī± in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3, liegt.In a further embodiment d ā¢ 1 ā‹… s ā¢ 1 d ā¢ 2 ā‹… s ā¢ 2 > Ī±
Figure imgb0001
 where d1 is the diameter of the first screw thread, d2 is the diameter of the second screw thread, s1 is the pitch of the first screw thread, and s2 is the pitch of the second screw thread, Ī± being in a range of 1.3 to 4, preferably 1.5 to 3, lies.

Bei einer weiteren AusfĆ¼hrungsform sind das erste Schraubengewinde und das zweite Schraubengewinde aus unterschiedlichen Werkstoffen.In a further embodiment, the first screw thread and the second screw thread are made of different materials.

Bei einer weiteren AusfĆ¼hrungsform sind das erste Schraubengewinde aus Teflon und das zweite Schraubengewinde aus einem Elastomer.In another embodiment, the first screw thread is Teflon and the second screw thread is an elastomer.

Beispielsweise hat das Fluid oder viskose Medium eine ViskositƤt von 0,1 bis 107 mPas, bevorzugt von 101 bis 106 mPas, besonders bevorzugt von 103 bis 104 mPas.For example, the fluid or viscous medium has a viscosity of 0.1 to 10 7 mPas, preferably from 10 1 to 10 6 mPas, particularly preferably from 10 3 to 10 4 mPas.

Die Erfindung wird nachfolgend anhand der in den schematischen Figuren angegebenen AusfĆ¼hrungsbeispiele nƤher erlƤutert. Es zeigen:

Fig. 1
eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen eingƤngigen Rotors;
Fig. 2
eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen zweigƤngigen Stators;
Fig. 3
eine Ansicht eines Ausschnitts eines AusfĆ¼hrungsbeispiels einer erfindungsgemƤƟen Exzenterschneckenpumpe mit einem eingƤngigen Rotor nach Fig. 1 und mit einem zweigƤngigen Stator nach Fig. 2;
Fig. 4
eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen zweigƤngigen Rotors;
Fig. 5
eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen dreigƤngigen Stators;
Fig. 6
eine Ansicht eines Ausschnitts eines AusfĆ¼hrungsbeispiels einer erfindungsgemƤƟen Exzenterschneckenpumpe mit einem zweigƤngigen Rotor nach Fig. 4 und mit einem dreigƤngigen Stator nach Fig. 5; und
Fig. 7
ein schematisches Ablaufdiagramm eines AusfĆ¼hrungsbeispiels eines Verfahrens zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe gemƤƟ der Erfindung.
The invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures. Show it:
Fig. 1
a view of an embodiment of a catchy rotor according to the invention;
Fig. 2
a view of an embodiment of a double-flighted stator according to the invention;
Fig. 3
a view of a section of an embodiment of an eccentric screw according to the invention with a catchy rotor according to the invention Fig. 1 and with a two-speed stator behind Fig. 2 ;
Fig. 4
a view of an embodiment of a two-speed rotor according to the invention;
Fig. 5
a view of an embodiment of a three-speed stator according to the invention;
Fig. 6
a view of a section of an embodiment of an eccentric screw according to the invention with a two-speed rotor after Fig. 4 and with a three-speed stator after Fig. 5 ; and
Fig. 7
a schematic flow diagram of an embodiment of a method for producing a conveyor element for an eccentric screw pump according to the invention.

In allen Figuren sind gleiche bzw. funktionsgleiche Mittel und Einrichtungen - sofern nichts anderes angegeben - mit denselben Bezugszeichen versehen.In all figures, the same or functionally identical means and devices - unless otherwise indicated - provided with the same reference numerals.

In Fig. 1 ist eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen eingƤngigen Rotors 1 dargestellt.In Fig. 1 a view of an embodiment of a catchy rotor 1 according to the invention is shown.

Der eingƤngige Rotor 1 ist dazu geeignet, in einer Wirkverbindung mit einem zweigƤngigen Stator einer Exzenterschneckenpumpe Fluid zu dosieren und zu fƶrdern (siehe dazu Fig. 3).The catchy rotor 1 is adapted to be in operative connection with a double-flighted stator Progressing cavity pump To dose and convey fluid (see Fig. 3 ).

In einem ersten Bereich B1 hat der Rotor 1 ein erstes Schraubengewinde 2 zum Bereitstellen eines ersten Fƶrdervolumens v1. In einem an den ersten Bereich B1 anschlieƟenden zweiten Bereich B2 hat der Rotor 1 ein zweites Schraubengewinde 3 zum Bereitstellen eines zweiten Fƶrdervolumens v2. Das erste Fƶrdervolumen v1 ist grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Beispielsweise ist das erste Fƶrdervolumen v1 um das 1,3-fache bis 4-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Insbesondere ist das erste Fƶrdervolumen v1 um das 1,5-fache bis 3-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 sind jeweils als ein AuƟenschraubengewinde ausgebildet.In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2. The first delivery volume v1 is greater than the second delivery volume v2. For example, the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2. In particular, the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2. The first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.

Das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 sind insbesondere als ein einstĆ¼ckiges Teil ausgebildet. Es ist allerdings auch mƶglich, das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 als zwei getrennte Teile herzustellen und in einem anschlieƟenden FĆ¼geprozess zu fĆ¼gen.The first screw thread 2 and the second screw thread 3 are in particular formed as a one-piece part. However, it is also possible to produce the first screw thread 2 and the second screw thread 3 as two separate parts and to add in a subsequent joining process.

In der AusfĆ¼hrungsform der Fig. 1 sind die ExzentrizitƤten e1, e2 des ersten und zweiten Schraubengewindes 2, 3 gleich. Weiter sind die Durchmesser d1, d2 des ersten und zweiten Schraubengewindes 2, 3 unterschiedlich. Die Steigungen s1, s2 des ersten und zweiten Schraubengewindes 2, 3 sind unterschiedlich. Zum Beispiel: e1=e2, d1=1,5Ā·d2, s1 = 1,5Ā·s2, v1=2,25Ā·v2 (v=4Ā·eĀ·dĀ·s).In the embodiment of the Fig. 1 the eccentricities e1, e2 of the first and second screw threads 2, 3 are the same. Further, the diameters d1, d2 of the first and second screw threads 2, 3 are different. The slopes s1, s2 of the first and second screw threads 2, 3 are different. For example: e1 = e2, d1 = 1.5 * d2, s1 = 1.5 * s2, v1 = 2.25 * v2 (v = 4 * e * d * s).

Fig. 2 zeigt eine Schnittansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen zweigƤngigen Stators 4. Der zweigƤngige Stator 4 kann mit dem Rotor 1 der Fig. 1 in eine Wirkverbindung gebracht werden (siehe Fig. 3). Der zweigƤngige Stator 4 der Fig. 2 hat in einem ersten Bereich B1 ein erstes Schraubengewinde 5 zum Bereitstellen des ersten Fƶrdervolumens v1. In einem zweiten Bereich B2 hat der Stator 4 ein zweites Schraubengewinde 6 zum Bereitstellen des zweiten Fƶrdervolumens v2. Das erste Schraubengewinde 5 und das zweite Schraubengewinde 6 sind jeweils als ein zweigƤngiges Innenschraubengewinde ausgebildet. Fig. 2 shows a sectional view of an embodiment of a double-flighted stator according to the invention 4. The double-flighted stator 4 may be connected to the rotor 1 of Fig. 1 be brought into an operative connection (see Fig. 3 ). The double-flighted stator 4 of the Fig. 2 has in a first area B1 a first screw thread 5 for providing the first delivery volume v1. In a second region B2, the stator 4 has a second screw thread 6 for providing the second Delivery volume v2. The first screw thread 5 and the second screw thread 6 are each formed as a double-threaded thread.

Weiter zeigt die Fig. 3 eine Ansicht eines Ausschnitts eines AusfĆ¼hrungsbeispiels einer erfindungsgemƤƟen Exzenterschneckenpumpe 7 mit einem eingƤngigen Rotor 1 nach Fig. 1 und einem zweigƤngigen Stator 4 nach Fig. 2. Der zweigƤngige Stator 4 ist geschnitten gezeigt. In dem ersten Bereich B1 der Exzenterschneckenpumpe 7 sind das erste AuƟenschraubengewinde 2 des Rotors 1 sowie das erste Innenschraubengewinde 5 des Stators 4 angeordnet. Entsprechend sind in dem zweiten Bereich B2 das zweite AuƟenschraubengewinde 3 des Rotors 1 sowie das zweite Innenschraubengewinde 6 des Stators 4 angeordnet.Next shows the Fig. 3 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a catchy rotor 1 after Fig. 1 and a double-flighted stator 4 Fig. 2 , The double-flighted stator 4 is shown cut. In the first region B1 of the eccentric screw pump 7, the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged. Accordingly, the second outer screw thread 3 of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.

In Fig. 4 ist eine Ansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen zweigƤngigen Rotors 1 dargestellt.In Fig. 4 is a view of an embodiment of a double-flighted rotor 1 according to the invention shown.

Der zweigƤngige Rotor 1 ist dazu geeignet, in einer Wirkverbindung mit einem dreigƤngigen Stator einer Exzenterschneckenpumpe Fluid zu dosieren und zu fƶrdern (siehe dazu Fig. 6).The double-flighted rotor 1 is suitable for metering and delivering fluid in operative connection with a three-speed stator of an eccentric screw pump (see Fig. 6 ).

In einem ersten Bereich B1 hat der Rotor 1 ein erstes Schraubengewinde 2 zum Bereitstellen eines ersten Fƶrdervolumens v1. In einem an den ersten Bereich B1 anschlieƟenden zweiten Bereich B2 hat der Rotor 1 ein zweites Schraubengewinde 3 zum Bereitstellen eines zweiten Fƶrdervolumens v2. Das erste Fƶrdervolumen v1 ist grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Beispielsweise ist das erste Fƶrdervolumen v1 um das 1,3-fache bis 4-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Insbesondere ist das erste Fƶrdervolumen v1 um das 1,5-fache bis 3-fache grĆ¶ĆŸer als das zweite Fƶrdervolumen v2. Das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 sind jeweils als ein AuƟenschraubengewinde ausgebildet.In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2. The first delivery volume v1 is greater than the second delivery volume v2. For example, the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2. In particular, the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2. The first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.

Das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 sind insbesondere als ein einstĆ¼ckiges Teil ausgebildet. Allerdings ist es auch mƶglich, das erste Schraubengewinde 2 und das zweite Schraubengewinde 3 als zwei getrennte Teile herzustellen und in einem anschlieƟenden FĆ¼geprozess zu fĆ¼gen. In der AusfĆ¼hrungsform der Fig. 4 sind die ExzentrizitƤten e1, e2 des ersten und zweiten Schraubengewindes 2, 3 gleich. Weiter sind die Durchmesser d1, d2 des ersten und zweiten Schraubengewindes 2, 3 unterschiedlich. Die Steigungen s1, s2 des ersten und zweiten Schraubengewindes 2, 3 sind unterschiedlich.The first screw thread 2 and the second screw thread 3 are in particular formed as a one-piece part. However, it is also possible to manufacture the first screw thread 2 and the second screw thread 3 as two separate parts and to add them in a subsequent joining process. In the embodiment of the Fig. 4 the eccentricities e1, e2 of the first and second screw threads 2, 3 are the same. Further, the diameters d1, d2 of the first and second screw threads 2, 3 are different. The slopes s1, s2 of the first and second screw threads 2, 3 are different.

Fig. 5 zeigt eine Schnittansicht eines AusfĆ¼hrungsbeispiels eines erfindungsgemƤƟen dreigƤngigen Stators 4. Der dreigƤngige Stator 4 kann mit dem Rotor 1 der Fig. 4 in eine Wirkverbindung gebracht werden (siehe Fig. 6). Der dreigƤngige Stator 4 der Figur 5 hat in dem ersten Bereich B1 ein erstes Schraubengewinde 5 zum Bereitstellen des ersten Fƶrdervolumens v1. In dem zweiten Bereich B2 hat der Stator 4 ein zweites Schraubengewinde 6 zum Bereitstellen des zweiten Fƶrdervolumens v2. Das erste Schraubengewinde 5 und das zweite Schraubengewinde 6 sind jeweils als ein dreigƤngiges Innenschraubengewinde ausgebildet. Fig. 5 shows a sectional view of an embodiment of a three-speed stator according to the invention 4. The three-speed stator 4 may be connected to the rotor 1 of Fig. 4 be brought into an operative connection (see Fig. 6 ). The three-speed stator 4 of FIG. 5 has in the first area B1 a first screw thread 5 for providing the first delivery volume v1. In the second region B2, the stator 4 has a second screw thread 6 for providing the second delivery volume v2. The first screw thread 5 and the second screw thread 6 are each formed as a three-start internal screw thread.

Weiter zeigt die Fig. 6 eine Ansicht eines Ausschnitts eines AusfĆ¼hrungsbeispiels einer erfindungsgemƤƟen Exzenterschneckenpumpe 7 mit einem zweigƤngigen Rotor 1 nach Fig. 4 und einem dreigƤngigen Stator 4 nach Fig. 5. In dem ersten Bereich B1 der Exzenterschneckenpumpe 7 sind das erste AuƟenschraubengewinde 2 des Rotors 1 sowie das erste Innenschraubengewinde 5 des Stators 4 angeordnet. Entsprechend sind in dem zweiten Bereich B2 das zweite AuƟenschraubengewinde des Rotors 1 sowie das zweite Innenschraubengewinde 6 des Stators 4 angeordnet.Next shows the Fig. 6 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a two-speed rotor 1 after Fig. 4 and a three-speed stator 4 after Fig. 5 , In the first region B1 of the eccentric screw pump 7, the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged. Accordingly, the second outer screw thread of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.

In Fig. 7 ist ein schematisches Ablaufdiagramm eines AusfĆ¼hrungsbeispiels eines Verfahrens zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe dargestellt.In Fig. 7 is a schematic flow diagram of an embodiment of a method for producing a conveyor element for an eccentric screw pump shown.

In einem Schritt S1 wird in einem ersten Bereich des Fƶrderelements ein erstes Schraubengewinde zum Bereitstellen eines ersten Fƶrdervolumens hergestellt.In a step S1, a first screw thread for providing a first delivery volume is produced in a first region of the delivery element.

In einem Schritt S2 wird in einem zweiten Bereich des Fƶrderelements ein zweites Schraubengewinde zum Bereitstellen eines zweiten Fƶrdervolumens hergestellt, wobei das erste Fƶrdervolumen grĆ¶ĆŸer als das zweite Fƶrdervolumen ist.In a step S2, a second screw thread for providing a second delivery volume is produced in a second region of the delivery element, wherein the first delivery volume is greater than the second delivery volume.

Obwohl die vorliegende Erfindung vorstehend anhand der bevorzugten AusfĆ¼hrungsbeispiele beschrieben wurde, ist sie darauf nicht beschrƤnkt, sondern auf vielfƤltige Art und Weise modifizierbar.Although the present invention has been described above with reference to the preferred embodiments, it is not limited thereto, but modified in many ways.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Rotorrotor
22
erstes Schraubengewindefirst screw thread
33
zweites Schraubengewindesecond screw thread
44
Statorstator
55
erstes Schraubengewindefirst screw thread
66
zweites Schraubengewindesecond screw thread
77
ExzenterschneckenpumpeCavity Pump
B1B1
erster Bereichfirst area
B2B2
zweiter Bereichsecond area
S1S1
Verfahrensschrittstep
S2S2
Verfahrensschrittstep

Claims (15)

Fƶrderelement (1, 4) fĆ¼r eine Exzenterschneckenpumpe (7) zum Fƶrdern eines Fluids, mit: einem ersten Schraubengewinde (2, 5) zum Bereitstellen eines ersten Fƶrdervolumens (v1) und einem zweiten Schraubengewinde (3, 6) zum Bereitstellen eines zweiten Fƶrdervolumens (v2), wobei das erste Fƶrdervolumen (v1) grĆ¶ĆŸer als das zweite Fƶrdervolumen (v2) ist. Conveying element (1, 4) for an eccentric screw pump (7) for conveying a fluid, comprising: a first screw thread (2, 5) for providing a first delivery volume (v1) and a second screw thread (3, 6) for providing a second delivery volume (v2), wherein the first delivery volume (v1) is greater than the second delivery volume (v2) , Fƶrderelement nach Anspruch 1,
dadurch gekennzeichnet,
dass das erste Fƶrdervolumen (v1) um das 1,3-fache bis 4-fache, bevorzugt um das 1,5-fache bis 3-fache, grĆ¶ĆŸer als das zweite Fƶrdervolumen (v2) ist.Conveying element according to claim 1,
characterized,
that the first flow volume (v1) to 1.5 times is preferable to 3 times, greater than the second flow volume (v2) is 1.3 times to 4 times. Fƶrderelement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass das Fƶrderelement (1, 4) als ein eingƤngiger oder mehrgƤngiger Rotor (1) der Exzenterschneckenpumpe (7) ausgebildet ist, wobei das erste Schraubengewinde (2, 5) und das zweite Schraubengewinde (3, 6) jeweils als ein AuƟenschraubengewinde ausgebildet sind.Conveying element according to claim 1 or 2,
characterized,
in that the conveying element (1, 4) is designed as a catchy or multi-start rotor (1) of the eccentric screw pump (7), wherein the first screw thread (2, 5) and the second screw thread (3, 6) are each designed as an external screw thread. Fƶrderelement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass das Fƶrderelement (1, 4) als ein Stator (4) der Exzenterschneckenpumpe (7) ausgebildet ist, wobei das erste Schraubengewinde (2, 5) und das zweite Schraubengewinde (3, 6) jeweils als ein mehrgƤngiges Innenschraubengewinde ausgebildet sind.Conveying element according to claim 1 or 2,
characterized,
in that the conveying element (1, 4) is designed as a stator (4) of the eccentric screw pump (7), wherein the first screw thread (2, 5) and the second screw thread (3, 6) are each designed as a multi-thread internal screw thread. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 4,
dadurch gekennzeichnet,
dass das erste Schraubengewinde (2, 5) und das zweite Schraubengewinde (3, 6) als ein einstĆ¼ckiges Teil ausgebildet sind.Conveying element according to one of claims 1 to 4,
characterized,
that the first screw thread (2, 5) and the second Screw threads (3, 6) are formed as an integral part. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 5,
dadurch gekennzeichnet,
dass die ExzentrizitƤten des ersten und zweiten Schraubengewindes (2, 5; 3, 6) gleich sind und die Durchmesser des ersten und zweiten Schraubengewindes (2, 5; 3, 6) unterschiedlich sind.Conveying element according to one of claims 1 to 5,
characterized,
that the eccentricities of the first and second screw thread (2, 5; 3, 6) are equal and the diameters of the first and second screw thread (2, 5; 3, 6) are different. Fƶrderelement nach Anspruch 6,
dadurch gekennzeichnet,
dass das VerhƤltnis zwischen dem Durchmesser des ersten Schraubengewindes (2, 5) und dem Durchmesser des zweiten Schraubengewindes (3, 6) in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3, liegt.Conveying element according to claim 6,
characterized,
that the ratio between the diameter of the first screw thread (2, 5) and the diameter of the second screw thread (3, 6) in a range between 1.3 to 4, preferably from 1.5 to 3, is located. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 5,
dadurch gekennzeichnet,
dass die ExzentrizitƤten des ersten und zweiten Schraubengewindes (2, 5; 3, 6) gleich sind und die Steigungen des ersten und zweiten Schraubengewindes (2, 5; 3, 6) unterschiedlich sind.Conveying element according to one of claims 1 to 5,
characterized,
that the eccentricities of the first and second screw thread (2, 5; 3, 6) are equal and the slopes of the first and second screw thread (2, 5; 3, 6) are different. Fƶrderelement nach Anspruch 8,
dadurch gekennzeichnet,
dass das VerhƤltnis zwischen der Steigung des ersten Schraubengewindes (2, 5) und der Steigung des zweiten Schraubengewindes (3, 6) in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3, liegt.Conveying element according to claim 8,
characterized,
that the ratio between the pitch of the first screw thread (2, 5) and the pitch of the second screw thread (3, 6) in a range between 1.3 to 4, preferably from 1.5 to 3, is located. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 9,
dadurch gekennzeichnet,
dass die ExzentrizitƤten des ersten und zweiten Schraubengewindes (2, 5; 3, 6) gleich sind, die Durchmesser des ersten und zweiten Schraubengewindes (2, 5; 3, 6) unterschiedlich sind und die Steigungen des ersten und zweiten Schraubengewindes (2, 5; 3, 6) unterschiedlich sind.Conveying element according to one of claims 1 to 9,
characterized,
that the eccentricities of the first and second screw thread (2, 5; 3, 6) are equal, the diameter of the first and second screw threads (2, 5, 3, 6) are different and the pitches of the first and second screw threads (2, 5, 3, 6) are different. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 10,
dadurch gekennzeichnet,
dass d ā¢ 1 ā‹… s ā¢ 1 d ā¢ 2 ā‹… s ā¢ 2 > Ī±
Figure imgb0002
 ist, wobei
d1 den Durchmesser des ersten Schraubengewindes (2, 5), d2 den Durchmesser des zweiten Schraubengewindes (3, 6), s1 die Steigung des ersten Schraubengewindes (2, 5) und s2 die Steigung des zweiten Schraubengewindes (3, 6) bezeichnen, wobei Ī± in einem Bereich zwischen 1,3 bis 4, bevorzugt zwischen 1,5 bis 3, liegt.Conveying element according to one of claims 1 to 10,
characterized,
that d ā¢ 1 ā‹… s ā¢ 1 d ā¢ 2 ā‹… s ā¢ 2 > Ī±
Figure imgb0002
 is, where
d1 is the diameter of the first screw thread (2, 5), d2 is the diameter of the second screw thread (3, 6), s1 is the pitch of the first screw thread (2, 5) and s2 is the pitch of the second screw thread (3, 6) Ī± is in a range between 1.3 to 4, preferably between 1.5 to 3, lies. Fƶrderelement nach einem der AnsprĆ¼che 1 bis 11,
dadurch gekennzeichnet,
dass das erste Schraubengewinde (2, 5) und das zweite Schraubengewinde (3, 6) aus unterschiedlichen Werkstoffen sind.Conveying element according to one of claims 1 to 11,
characterized,
that the first screw thread (2, 5) and the second screw thread (3, 6) are made of different materials. Fƶrderelement nach Anspruch 12,
dadurch gekennzeichnet,
dass das erste Schraubengewinde (5) aus Teflon und das zweite Schraubengewinde (6) aus einem Elastomer ist.Conveying element according to claim 12,
characterized,
in that the first screw thread (5) is made of Teflon and the second screw thread (6) is made of an elastomer. Exzenterschneckenpumpe (7) zum Fƶrdern eines Fluids, mit: einem Stator (4) mit N+1 GewindegƤngen, welcher ein erstes Innenschraubengewinde (5) zum Bereitstellen eines ersten Fƶrdervolumens (v1) und ein zweites Innenschraubengewinde (6) zum Bereitstellen eines zweiten Fƶrdervolumens (v2) aufweist; einem in dem Stator (4) angeordneten Rotor (1) mit N GewindegƤngen, welcher ein erstes AuƟenschraubengewinde (2) zum Bereitstellen des ersten Fƶrdervolumens (v1) und ein zweites AuƟenschraubengewinde (3) zum Bereitstellen des zweiten Fƶrdervolumens (v2) aufweist, wobei das erste Fƶrdervolumen (v1) grĆ¶ĆŸer als das zweite Fƶrdervolumen (v2) ist. Eccentric screw pump (7) for conveying a fluid, comprising: a N + 1 thread stator (4) having a first female screw thread (5) for providing a first delivery volume (v1) and a second inner screw thread (6) for providing a second delivery volume (v2); a rotor (1) having N threads arranged in the stator (4) and having a first external screw thread (2) for providing the first delivery volume (v1) and a second external screw thread (3) for providing the second delivery volume (v2), wherein the first delivery volume (v1) is greater than the second delivery volume (v2). Verfahren zum Herstellen eines Fƶrderelements fĆ¼r eine Exzenterschneckenpumpe zum Fƶrdern eines Fluids, bei welchem ein erstes Schraubengewinde des Fƶrderelements zum Bereitstellen eines ersten Fƶrdervolumens und ein zweites Schraubengewinde des Fƶrderelements zum Bereitstellen eines zweiten Fƶrdervolumens derart hergestellt werden, dass das erste Fƶrdervolumen grĆ¶ĆŸer als das zweite Fƶrdervolumen ist.A method for producing a conveyor element for an eccentric screw pump for conveying a fluid, wherein a first screw thread of the conveyor element for providing a first delivery volume and a second screw thread of the conveyor element are prepared for providing a second delivery volume such that the first delivery volume is greater than the second delivery volume ,
EP11169407.1A 2011-06-10 2011-06-10 Conveying element for an eccentric screw pump and eccentric screw pump Active EP2532833B1 (en)

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FR3136019A1 (en) * 2022-05-25 2023-12-01 Pcm Technologies Progressive cavity pump and pumping device

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