EP2404061B1 - Eccentric screw pump - Google Patents

Eccentric screw pump Download PDF

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Publication number
EP2404061B1
EP2404061B1 EP10711641.0A EP10711641A EP2404061B1 EP 2404061 B1 EP2404061 B1 EP 2404061B1 EP 10711641 A EP10711641 A EP 10711641A EP 2404061 B1 EP2404061 B1 EP 2404061B1
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EP
European Patent Office
Prior art keywords
rotor
eccentric screw
screw pump
stator
section
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Revoked
Application number
EP10711641.0A
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German (de)
French (fr)
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EP2404061A2 (en
Inventor
Ralf Daunheimer
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Individual
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Individual
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Priority to PL10711641T priority Critical patent/PL2404061T3/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
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • 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
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2250/201—Geometry of the rotor conical shape

Definitions

  • the invention relates to an eccentric screw pump, in particular for pumping thick, highly viscous and abrasive media, with a longitudinal direction L, at least having a conical, helically wound, at least single-start rotor with a pitch h, with at least one eccentricity e and at least one cross section d, the is rotatably arranged in a single or multi-turn conical stator, in which a plurality of chambers, each with a volume, are formed between the rotor and the stator, which are used to convey the medium and in which the chambers between the stator and the rotor are delimited by a sealing line D. are.
  • the invention further relates to an eccentric screw pump, in particular for pumping thick, highly viscous and abrasive media, with a longitudinal direction L, at least having a step-shaped, helically wound, at least single-start rotor with a pitch h, with at least one eccentricity e and at least one cross section d, which is rotatably arranged in a single or multi-turn staircase-shaped stator.
  • Eccentric screw pumps are sufficiently known from the prior art.
  • B. in the DE 633 784 a Eccentric screw pump described in which two helical elements lie one inside the other and in which the outer element has one more screw thread or tooth than the inner element and in which the gradients of the screw turns of the two elements behave like the number of threads or teeth, but are constant, may be increasing or decreasing, at least three cooperating helical elements are provided, of which the middle one tooth more than the inside and one tooth less than the outside.
  • an eccentric screw pump with a conical screw shaft and a housing insert is known, which is characterized in that the eccentric screw shaft has a round, cylindrical basic cross-section and a conically increasing conical outer diameter, and that the conically wound inner hollow screw with twice the pitch of the eccentric screw shaft, a conical, hypocycloid Rolling of the eccentric worm on the inner surface of the conical, winding hollow worm causes.
  • the U.S. 1,892,217 A discloses progressing cavity pumps, including those with a conically shaped rotor.
  • This prior art proposes the use of gears with which the rotor and stator are aligned with one another in a manner not described in detail so that they are just not in contact, in order to avoid wear.
  • the disclosure must be understood to mean that this occurs only once when the pump is started up.
  • the eccentric screw pump according to the invention is characterized in that the volumes of each individual chamber between the stator and rotor are of the same size.
  • This embodiment of an eccentric screw pump according to the invention makes it possible for the pump to always have the maximum possible delivery rate. If there are any signs of wear, B. the rotor shaft or the stator can be moved in the longitudinal direction so that the chamber volume is the same again and the pumping performance of the eccentric screw pump is optimal.
  • the cross section d of the rotor decreases in the longitudinal direction of the rotor. Via the decrease in the cross section, e.g. the chamber volume is kept constant when the eccentricity changes.
  • the pitch h of the rotor decreases with a decreasing cross section d of the rotor and that the rotor has a decreasing cross section d in the longitudinal direction L. It is also possible that the eccentricity e of the rotor increases or decreases in the longitudinal direction L and that the cross section d of the rotor decreases or increases. Furthermore, the eccentric screw pump according to the invention can be designed such that the eccentricity of the rotor increases or decreases in the longitudinal direction and the pitch h of the rotor increases or decreases in the longitudinal direction.
  • the eccentricity of the rotor increases or decreases in the longitudinal direction L
  • the pitch h of the rotor increases or decreases in the longitudinal direction L
  • the rotor has a decreasing or increasing cross-section d in the longitudinal direction.
  • eccentric screw pumps for the most diverse areas of application, namely areas of application in which thick, highly viscous and / or abrasive media have to be transported.
  • the rotor can have a coating, e.g. B. with chrome, with a ceramic material or other materials.
  • the stator and / or rotor can consist of an elastomer or a solid.
  • the appropriate material for the stator and / or rotor depending on the intended area of use for the eccentric screw pump according to the invention.
  • the stator can also advantageously have an annular or tubular stator casing made of a different material.
  • This stator casing can be used to protect the stator and thus to increase the service life of the eccentric screw pump.
  • the stator casing is conical in shape.
  • the stator has a uniform plastic wall thickness.
  • Fig. 1 shows a rotor 1 of an eccentric screw pump according to the invention in longitudinal section.
  • the rotor 1 has a pitch h and an eccentricity e 1 at the beginning of the rotor 1 and an eccentricity e n at the end of the rotor 1.
  • the eccentricity of the rotor 1 increases so that the dimension e n is greater than the dimension e 1 .
  • Figure 1b the view A: A is shown on the beginning end of the rotor 1.
  • the rotor 1 has a cross section d 1 and the eccentricity e 1 which can also be seen in this view.
  • Figure 1c shows view B: B Fig.
  • Fig. 2 shows the stator 2 of an eccentric screw pump according to the invention.
  • the rotor 1 described above can be made Fig. 1a are introduced and in this way forms the eccentric screw pump according to the invention, which is characterized in that the individual volumes that are available for the transport of the medium are of the same size in the longitudinal direction L of the rotor.
  • the conicity of the stator and the rotor that fits into it can be clearly seen. Due to the conicity of the stator 2 and rotor 1 and the corresponding setting of the pitch, cross section and / or eccentricity, it is possible to keep the individual volumes of the chambers in the eccentric screw pump according to the invention constant.
  • FIGS. 3a, 3b and 3c show a further embodiment of a rotor 1 which can be introduced into an eccentric screw pump according to the invention.
  • the rotor 1 At its beginning (view A: A) the rotor 1 has a cross section d 1 which is larger than the cross section of the rotor 1 at its end (view B: B), which is marked with the dimension d 2 .
  • a decrease in the cross section of the rotor can be seen along the longitudinal direction L of the rotor 1, which results in the rotor 1 having a conical shape.
  • the eccentricity e of the rotor begins at the beginning of the rotor 1 (position A) with a size e 1 and ends at position B with a maximum value e n .
  • the eccentricity e thus increases in the longitudinal direction of the rotor 1, that is to say from the larger cross section to the smaller cross section d.
  • the respective views A: A and B: B are shown, which enable the top view of the end or the beginning of the rotor 1.
  • the Figure 3b it can be seen that the eccentricity e 1 at the beginning of the rotor 1, at the point A with the cross section d 1, is significantly less than the eccentricity e n, which is located in FIG Figure 3c which shows a view (view B: B) of the rotor end.
  • FIG Figure 3c shows a view (view B: B) of the rotor end.
  • the cross section d 2 is also smaller than the cross section d 1 .
  • an eccentric screw pump 100 according to the invention is shown, which has a rotor 1 and a stator 2.
  • Different chamber volumes V 3 , V 4 , V 5 ... V n of the chambers 3, 4, 5 ... n can be seen between the rotor 1 and the stator 2, which according to the invention are all the same size.
  • the same size of the volumes just listed results from the fact that both the rotor 1 has a predetermined Conicity and an eccentricity, pitch and / or cross section of the rotor 1 adapted to it, which is surrounded by the correspondingly shaped stator 2.
  • a sealing line D is formed between the stator 2 and the rotor 1, along which the necessary pressure is built up that is necessary to circulate the abrasive, highly viscous medium to be transported under pressure through the eccentric screw pump 100.
  • this sealing line migrates essentially spirally along the longitudinal direction L in the direction of the outlet of the eccentric screw pump 100 according to the invention and moves the medium to be transported in the direction of the pump outlet.
  • the medium to be transported which is located within the volumes, is moved in the direction of the outlet of the eccentric screw pump 100 according to the invention.
  • the drive of the eccentric screw pump 100 according to the invention can, for. B. via an electric motor which is arranged at the end (position A) of the eccentric screw pump according to the invention, which has the cross section d 1 and rotates the rotor 1 at this point.
  • Figure 4a It can also be seen that the cross-section d 1 at the beginning of the rotor 1 is larger than the cross-section d 2 at the end of the rotor 1. This is associated with the fact that the eccentricity of the eccentric screw pump 100 according to the invention at the beginning, i.e. in the area of the entry into the eccentric screw pump (position A) is less than towards the end (position B), that is to say towards the outlet end of the medium of the eccentric screw pump 100.
  • the eccentricity at the inlet of the eccentric screw pump (position A) is marked with e 1 and the eccentricity at the outlet (position B) of the eccentric screw pump 100 according to the invention is marked with e n .
  • the views of the input area and the end area of the eccentric screw pump 100 according to the invention, which are shown in FIGS Figures 4b and 4c also clearly show once again that the eccentricity increases in the longitudinal direction L of the eccentric screw pump 100 according to the invention or in the longitudinal direction L of the rotor 1, so that e 1 is smaller than e n .
  • the Figures 5a to 5c show a further possible embodiment of the eccentric screw pump 100 according to the invention, which differs from that in FIGS Figures 4a to 4c
  • the eccentric screw pump 100 shown differs in that the cross section d 1 of the rotor 1 in the longitudinal direction L of the rotor 1 is not changed.
  • the pitch h of the rotor or stator in the longitudinal direction L of the eccentric screw pump according to the invention was changed.
  • the slope h decreases in the longitudinal direction L of the eccentric screw pump 100 according to the invention.
  • the Figure 5b and 5c show the views along the line A: A and B: B, respectively Figure 5a , namely the views of the inlet end and the outlet end of this embodiment of the Eccentric screw pump 100 according to the invention. It can be seen that the eccentricity e 1 at the inlet end of the eccentric screw pump is greater than the eccentricity e n in the outlet area.
  • a further embodiment of the eccentric screw pump 100 according to the invention is also shown, which differs from that shown in FIGS Figures 4a to 4c
  • the eccentric screw pump shown differs in that, in this embodiment, both the cross section and the pitch of the rotor or the stator have been changed.
  • FIGs 7a to 7c Another variant of the eccentric screw pump according to the invention is shown in which both the eccentricity, the cross section and the pitch of the rotor or the stator have been changed, the individual volumes V 3 , V 4 , V 5 being kept constant.
  • the slope h decreases in the longitudinal direction L of the eccentric screw pump according to the invention.
  • the change in terms of the cross section of the rotor 1 and the eccentricity e show Figures 7b and 7c .

Description

Die Erfindung betrifft eine Exzenterschneckenpumpe, insbesondere zur Förderung von dickflüssigen, hochviskosen und abrasiven Medien, mit einer Längsrichtung L, mindestens aufweisend einen konischen, schraubenförmig gewundenen, mindestens eingängigen Rotor mit einer Steigung h, mit mindestens einer Exzentrizität e und mindestens einem Querschnitt d, der in einem ein- oder mehrgängigen konischen Stator, drehbar angeordnet ist, bei der zwischen Rotor und Stator eine Mehrzahl von Kammern mit jeweils einem Volumen gebildet ist, die zur Beförderung des Mediums dienen und bei der die Kammern zwischen Stator und Rotor durch eine Dichtlinie D begrenzt sind. Die Erfindung betrifft weiterhin eine Exzenterschneckenpumpe, insbesondere zur Förderung von dickflüssigen, hochviskosen und abrasiven Medien, mit einer Längsrichtung L, mindestens aufweisend einen treppenförmigen, schraubenförmig gewundenen, mindestens eingängigen Rotor mit einer Steigung h, mit mindestens einer Exzentrizität e und mindestens einem Querschnitt d, der in einem ein- oder mehrgängigen treppenförmigen Stator, drehbar angeordnet ist.The invention relates to an eccentric screw pump, in particular for pumping thick, highly viscous and abrasive media, with a longitudinal direction L, at least having a conical, helically wound, at least single-start rotor with a pitch h, with at least one eccentricity e and at least one cross section d, the is rotatably arranged in a single or multi-turn conical stator, in which a plurality of chambers, each with a volume, are formed between the rotor and the stator, which are used to convey the medium and in which the chambers between the stator and the rotor are delimited by a sealing line D. are. The invention further relates to an eccentric screw pump, in particular for pumping thick, highly viscous and abrasive media, with a longitudinal direction L, at least having a step-shaped, helically wound, at least single-start rotor with a pitch h, with at least one eccentricity e and at least one cross section d, which is rotatably arranged in a single or multi-turn staircase-shaped stator.

Exzenterschneckenpumpen sind aus dem Stand der Technik hinreichend bekannt, so wird z. B. in der DE 633 784 eine Exzenterschneckenpumpe beschrieben, bei der zwei schraubenförmige Elemente ineinander liegen und bei der das äußere Element einen Schraubengang oder -zahn mehr als das innere Element hat und bei der sich die Steigungen der Schraubenwindungen der beiden Elemente wie die Gang- oder Zahnzahlen verhalten, dabei aber konstant, zunehmend oder abnehmend sein können, wobei wenigstens drei zusammenwirkende schneckenförmige Elemente vorgesehen sind, von denen das mittlere einen Zahn mehr als das Innere und einen Zahn weniger als das Äußere aufweist.Eccentric screw pumps are sufficiently known from the prior art. B. in the DE 633 784 a Eccentric screw pump described in which two helical elements lie one inside the other and in which the outer element has one more screw thread or tooth than the inner element and in which the gradients of the screw turns of the two elements behave like the number of threads or teeth, but are constant, may be increasing or decreasing, at least three cooperating helical elements are provided, of which the middle one tooth more than the inside and one tooth less than the outside.

Aus der DE 27 36 590 A1 wird eine Exzenterschneckenpumpe mit einer konischen Schneckenwelle und einem Gehäuseeinsatz bekannt, die sich dadurch auszeichnet, dass die Exzenterschneckenwelle einen runden, zylindrischen Grundquerschnitt und einen konisch ansteigenden kegeligen Außendurchmesser hat, und dass die konisch gewundene Innenhohlschnecke mit der doppelten Steigung der Exzenterschneckenwelle, ein konisch, hypozykloides Abrollen der Exzenterschneckenwelle auf dem Innenmantel der konischen, gewundenen Hohlschnecke bewirkt.From the DE 27 36 590 A1 an eccentric screw pump with a conical screw shaft and a housing insert is known, which is characterized in that the eccentric screw shaft has a round, cylindrical basic cross-section and a conically increasing conical outer diameter, and that the conically wound inner hollow screw with twice the pitch of the eccentric screw shaft, a conical, hypocycloid Rolling of the eccentric worm on the inner surface of the conical, winding hollow worm causes.

Die US 1 892 217 A offenbart Exzenterschneckenpumpen, unter anderem auch mit konisch geformtem Rotor. Dieser Stand der Technik schlägt vor, Zahnräder zu verwenden, mit denen Rotor und Stator auf nicht näher beschriebene Weise so zueinander ausgerichtet werden, dass sie gerade eben nicht in Kontakt sind, um Verschleiß zu vermeiden. Die Offenbarung muss so verstanden werden, dass dies nur einmalig bei Inbetriebnahme der Pumpe erfolgt.The U.S. 1,892,217 A discloses progressing cavity pumps, including those with a conically shaped rotor. This prior art proposes the use of gears with which the rotor and stator are aligned with one another in a manner not described in detail so that they are just not in contact, in order to avoid wear. The disclosure must be understood to mean that this occurs only once when the pump is started up.

Die US 6 457 958 B1 lehrt Exzenterschneckenpumpem mit verschiedenen Einstellmöglichkeiten, ohne jedoch näher auf die geometrischen Eigenschaften und Auswirkungen einzugehen.The US 6 457 958 B1 teaches eccentric screw pumps with various setting options, but without going into detail on the geometric properties and effects.

Problematisch bei den Exzenterschneckenpumpen des Standes der Technik ist, dass es bei Exzenterschneckenpumpen die mehrere Kammern aufweisen, durch Verschleißerscheinungen beim Betrieb der Pumpe durch Kammervolumenerhöhung zur sogenannten Kavitation kommen kann, was dazu führt, dass die Förderleistung einer solchen Exzenterschneckenpumpe nicht mehr optimal ist.The problem with the eccentric screw pumps of the prior art is that in eccentric screw pumps that have several chambers, signs of wear during operation of the pump due to an increase in chamber volume can lead to so-called cavitation, which means that the delivery rate of such an eccentric screw pump is no longer optimal.

Ausgehend von dieser Problemstellung ist es Aufgabe der Erfindung, eine Exzenterschneckenpumpe bereitzustellen, die sich bei Verschleiß einfach nachstellen lässt, sodass immer eine optimale Pumpleistung erwartet werden kann und ein Austausch von Stator und/oder Rotor weniger oft erforderlich ist.Based on this problem, it is the task of Invention to provide an eccentric screw pump that can be easily readjusted when worn, so that Optimal pump performance can always be expected and the stator and / or rotor need not be replaced as often.

Zur Problemlösung zeichnet sich die erfindungsgemäße Exzenterschneckenpumpe dadurch aus, dass die Volumina jeder einzelnen Kammer zwischen Stator und Rotor gleichgroß sind.In order to solve the problem, the eccentric screw pump according to the invention is characterized in that the volumes of each individual chamber between the stator and rotor are of the same size.

Durch diese erfindungsgemäße Ausbildung einer Exzenterschneckenpumpe kann es ermöglicht werden, dass die Pumpe immer die maximal mögliche Förderleistung aufweist. Bei evtl. Verschleißerscheinungen kann z. B. die Rotorwelle bzw. der Stator in Längsrichtung verschoben werden, sodass das Kammervolumen wieder gleich ist und die Pumpleistung der Exzenterschneckenpumpe optimal ist.This embodiment of an eccentric screw pump according to the invention makes it possible for the pump to always have the maximum possible delivery rate. If there are any signs of wear, B. the rotor shaft or the stator can be moved in the longitudinal direction so that the chamber volume is the same again and the pumping performance of the eccentric screw pump is optimal.

Erfindungsgemäß ist vorgesehen, dass der Querschnitt d des Rotors in Längsrichtung des Rotors abnimmt. Über die Abnahme des Querschnittes kann z.B. bei sich verändernder Veränderung der Exzentrizität das Kammervolumen konstant gehalten.According to the invention it is provided that the cross section d of the rotor decreases in the longitudinal direction of the rotor. Via the decrease in the cross section, e.g. the chamber volume is kept constant when the eccentricity changes.

Darüber hinaus sind weitere Ausgestaltungsformen möglich, nämlich dass die Steigung h des Rotors mit abnehmendem Querschnitt d des Rotors abnimmt und dass der Rotor in Längsrichtung L einen abnehmenden Querschnitt d aufweist. Es ist auch möglich, dass die Exzentrizität e des Rotors in Längsrichtung L zu oder abnimmt und dass der Querschnitt d des Rotors ab oder zunimmt. Des Weiteren kann die erfindungsgemäße Exzenterschneckenpumpe derart ausgebildet werden, dass die Exzentrizität des Rotors in Längsrichtung zu oder abnimmt und die Steigung h des Rotors in Längsrichtung zu- oder abnimmt.In addition, further embodiments are possible, namely that the pitch h of the rotor decreases with a decreasing cross section d of the rotor and that the rotor has a decreasing cross section d in the longitudinal direction L. It is also possible that the eccentricity e of the rotor increases or decreases in the longitudinal direction L and that the cross section d of the rotor decreases or increases. Furthermore, the eccentric screw pump according to the invention can be designed such that the eccentricity of the rotor increases or decreases in the longitudinal direction and the pitch h of the rotor increases or decreases in the longitudinal direction.

Es ist auch möglich, dass bei einer erfindungsgemäßen Exzenterschneckenpumpe die Exzentrizität des Rotors in Längsrichtung L zu oder abnimmt, die Steigung h des Rotors in Längsrichtung L zu oder abnimmt und das der Rotor in Längsrichtung einen ab- oder zunehmenden Querschnitt d aufweist. Durch die Variationen der zuvor beschriebenen Parameter kann die Pumpleistung der erfindungsgemäßen Exzenterschneckenpumpe weiter optimiert werden, bzw. an die entsprechenden Bedürfnisse, die z.B. vom zu fördernden Gut vorgegeben werden, angepasst werden.It is also possible that in an eccentric screw pump according to the invention, the eccentricity of the rotor increases or decreases in the longitudinal direction L, the pitch h of the rotor increases or decreases in the longitudinal direction L and that the rotor has a decreasing or increasing cross-section d in the longitudinal direction. By varying the parameters described above, the pumping performance of the eccentric screw pump according to the invention can be further optimized, or to the corresponding needs, e.g. are specified by the good to be promoted.

Darüber hinaus ist es aufgrund dieser Variationsmöglichkeiten möglich, Exzenterschneckenpumpen für die verschiedensten Anwendungsgebiete, nämlich Anwendungsgebiete in denen dickflüssige, hochviskose und/oder abrasive Medien transportiert werden müssen, bereitzustellen.In addition, because of these possible variations, it is possible to provide eccentric screw pumps for the most diverse areas of application, namely areas of application in which thick, highly viscous and / or abrasive media have to be transported.

Um die Standzeit der erfindungsgemäßen Exzenterschneckenpumpe zu erhöhen, kann der Rotor als Verschleißschutz eine Beschichtung, z. B. mit Chrom, mit einem keramischen Werkstoff oder anderen Materialien aufweisen.In order to increase the service life of the eccentric screw pump according to the invention, the rotor can have a coating, e.g. B. with chrome, with a ceramic material or other materials.

Erfindungsgemäß ist vorgesehen, dass Stator und/oder Rotor aus einem Elastomer oder einem Feststoff bestehen können. Auch hier besteht die Möglichkeit, je nach dem vorgesehenen Einsatzgebiet für die erfindungsgemäße Exzenterschneckenpumpe das entsprechende Material für Stator und/oder Rotor vorzusehen.According to the invention it is provided that the stator and / or rotor can consist of an elastomer or a solid. Here, too, there is the possibility of providing the appropriate material for the stator and / or rotor, depending on the intended area of use for the eccentric screw pump according to the invention.

Vorteilhafterweise kann ebenfalls der Stator einen aus einem anderen Material bestehenden ring- oder röhrenförmigen Statormantel aufweisen. Dieser Statormantel kann zum Schutze des Stators und damit zur Erhöhung der Standdauer der Exzenterschneckenpumpe eingesetzt werden. Vorteilhafterweise ist dabei der Statormantel konisch geformt.The stator can also advantageously have an annular or tubular stator casing made of a different material. This stator casing can be used to protect the stator and thus to increase the service life of the eccentric screw pump. Advantageously the stator casing is conical in shape.

Erfindungsgemäß ist des Weiteren vorgesehen, dass der Stator eine gleichmäßige Kunststoffwandstärke aufweist.According to the invention it is further provided that the stator has a uniform plastic wall thickness.

Anhand einer Zeichnung soll ein Ausführungsbeispiel der Erfindung näher erläutert werden. Es zeigen:

Fig. 1a
den Längschnitt durch den Rotor einer erfindungsgemäßen Exzenterschneckenpumpe;
Fig. 1b
die Ansicht des Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;
Fig. 1c
eine weitere Ansicht eines Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Stelle B;
Fig. 2
den Längsschnitt durch eine erfindungsgemäße Exzenterschneckenpumpe;
Fig. 3a
den Längsschnitt durch eine weitere Ausführungsform der erfindungsgemäßen Exzenterschneckenpumpe;
Fig. 3b
die Ansicht des Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;
Fig. 3c
die Ansicht des Rotors auf den Rotor einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;
Fig. 4a
den Längsschnitt durch Rotor und Stator einer erfindungsgemäßen Exzenterschneckenpumpe;
Fig. 4b
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;
Fig. 4c
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;
Fig. 5a
den Längsschnitt durch eine erfindungsgemäße Exzenterschneckenpumpe einer weiteren Ausführungsform;
Fig. 5b
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;
Fig. 5c
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;
Fig. 6a
den Längsschnitt durch eine weitere Ausführungsform der Erfindungsgemäßen Exzenterschneckenpumpe;
Fig. 6b
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;
Fig. 6c
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;
Fig. 7a
den Längsschnitt durch eine weitere Ausführungsform einer erfindungsgemäßen Exzenterschneckenpumpe;
Fig. 7b
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A; und
Fig. 7c
die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B.
An exemplary embodiment of the invention is to be explained in more detail using a drawing. Show it:
Fig. 1a
the longitudinal section through the rotor of an eccentric screw pump according to the invention;
Figure 1b
the view of the rotor of an eccentric screw pump according to the invention at position A;
Figure 1c
another view of a rotor of an eccentric screw pump according to the invention at point B;
Fig. 2
the longitudinal section through an eccentric screw pump according to the invention;
Fig. 3a
the longitudinal section through a further embodiment of the eccentric screw pump according to the invention;
Figure 3b
the view of the rotor of an eccentric screw pump according to the invention at position A;
Figure 3c
the view of the rotor on the rotor of an eccentric screw pump according to the invention at position B;
Figure 4a
the longitudinal section through the rotor and stator of an eccentric screw pump according to the invention;
Figure 4b
the view of an eccentric screw pump according to the invention at position A;
Figure 4c
the view of an eccentric screw pump according to the invention at position B;
Figure 5a
the longitudinal section through an eccentric screw pump according to the invention in a further embodiment;
Figure 5b
the view of an eccentric screw pump according to the invention at position A;
Figure 5c
the view of an eccentric screw pump according to the invention at position B;
Figure 6a
the longitudinal section through a further embodiment of the eccentric screw pump according to the invention;
Figure 6b
the view of an eccentric screw pump according to the invention at position A;
Figure 6c
the view of an eccentric screw pump according to the invention at position B;
Figure 7a
the longitudinal section through a further embodiment of an eccentric screw pump according to the invention;
Figure 7b
the view of an eccentric screw pump according to the invention at position A; and
Figure 7c
the view of an eccentric screw pump according to the invention at position B.

Fig. 1 zeigt einen Rotor 1 einer erfindungsgemäßen Exzenterschneckenpumpe im Längsschnitt. Der Rotor 1 weist eine Steigung h auf sowie eine Exzentrizität e1 zu Beginn des Rotors 1 und eine Exzentrizität en zum Ende des Rotors 1. In Längsrichtung L des Rotors 1 nimmt die Exzentrizität des Rotors 1 zu, sodass das Maß en größer ist als das Maß e1. In Fig. 1b ist die Ansicht A:A auf das Anfangsende des Rotors 1 dargestellt. Der Rotor 1 weist einen Querschnitt d1 auf und die auch in dieser Ansicht erkennbare Exzentrizität e1.Fig. 1c zeigt die Ansicht B:B aus Fig. 1a, in der zu erkennen ist, dass der Querschnitt dn am Ende des Rotors 1 geringer ist als der Querschnitt d1 am Beginn des Rotors 1. Zu erkennen ist auch, dass die Exzentrizität im Verlauf des Rotors 1 in Längsrichtung L zunimmt. Fig. 1 shows a rotor 1 of an eccentric screw pump according to the invention in longitudinal section. The rotor 1 has a pitch h and an eccentricity e 1 at the beginning of the rotor 1 and an eccentricity e n at the end of the rotor 1. In the longitudinal direction L of the rotor 1, the eccentricity of the rotor 1 increases so that the dimension e n is greater than the dimension e 1 . In Figure 1b the view A: A is shown on the beginning end of the rotor 1. The rotor 1 has a cross section d 1 and the eccentricity e 1 which can also be seen in this view. Figure 1c shows view B: B Fig. 1a , in which it can be seen that the cross section d n at the end of the rotor 1 is smaller than the cross section d 1 at the beginning of the rotor 1. It can also be seen that the eccentricity increases in the longitudinal direction L as the rotor 1 extends.

Fig. 2 zeigt den Stator 2 einer erfindungsgemäßen Exzenterschneckenpumpe. In diesen Stator 2 kann der zuvor beschriebene Rotor 1 aus Fig. 1a eingebracht werden und bildet auf diese Weise die erfindungsgemäße Exzenterschneckenpumpe, die sich dadurch auszeichnet, dass die einzelnen Volumina die für den Transport des Mediums vorhanden sind in Längsrichtung L des Rotors gleichgroß sind. In der Längsdarstellung der Fig. 2 lässt sich deutlich die Konizität des Stators sowie des dahin hinein passenden Rotors erkennen. Aufgrund der Konizität von Stator 2 und Rotor 1 und der entsprechenden Einstellung von Steigung, Querschnitt und/oder Exzentrizität ist es möglich, die einzelnen Volumina der sich in der erfindungsgemäßen Exzenterschneckenpumpe befindenden Kammern konstant zu halten. Fig. 2 shows the stator 2 of an eccentric screw pump according to the invention. In this stator 2, the rotor 1 described above can be made Fig. 1a are introduced and in this way forms the eccentric screw pump according to the invention, which is characterized in that the individual volumes that are available for the transport of the medium are of the same size in the longitudinal direction L of the rotor. In the longitudinal representation of the Fig. 2 the conicity of the stator and the rotor that fits into it can be clearly seen. Due to the conicity of the stator 2 and rotor 1 and the corresponding setting of the pitch, cross section and / or eccentricity, it is possible to keep the individual volumes of the chambers in the eccentric screw pump according to the invention constant.

Die Fig. 3a, 3b und 3c zeigen eine weitere Ausführungsform eines Rotors 1, der in eine erfindungsgemäße Exzenterschneckenpumpe eingebracht werden kann. An seinem Beginn (Ansicht A:A) weist der Rotor 1 einen Querschnitt d1 auf, der größer ist als der Querschnitt des Rotors 1 an seinem Ende (Ansicht B:B), der mit dem Maß d2 gekennzeichnet ist. Entlang der Längsrichtung L des Rotors 1 lässt sich eine Abnahme des Querschnitts des Rotors erkennen, die darin resultiert, dass der Rotor 1 eine konische Form aufweist. Die Exzentrizität e des Rotors beginnt am Beginn des Rotors 1 (Position A) mit einer Größe e1 und endet an der Position B mit einem Maximalwert en. Die Exzentrizität e nimmt also in Längsrichtung des Rotors 1, das heißt vom größeren Querschnitt zum kleineren Querschnitt d, zu. In den Figuren 3b und 3c sind die jeweiligen Ansichten A:A sowie B:B dargestellt, die die Aufsicht auf das Ende bzw. den Anfang des Rotors 1 ermöglichen. Der Fig. 3b lässt sich entnehmen, dass die Exzentrizität e1 am Beginn des Rotors 1, an der Stelle A mit dem Querschnitt d1 deutlich geringer ist als die Exzentrizität en, die sich in der Fig. 3c, die eine Ansicht (Ansicht B:B) auf das Rotorende darstellt, zeigt. Der Fig. 3c lässt sich ebenfalls entnehmen, dass der Querschnitt d2 ebenfalls kleiner ist als der Querschnitt d1.The Figures 3a, 3b and 3c show a further embodiment of a rotor 1 which can be introduced into an eccentric screw pump according to the invention. At its beginning (view A: A) the rotor 1 has a cross section d 1 which is larger than the cross section of the rotor 1 at its end (view B: B), which is marked with the dimension d 2 . A decrease in the cross section of the rotor can be seen along the longitudinal direction L of the rotor 1, which results in the rotor 1 having a conical shape. The eccentricity e of the rotor begins at the beginning of the rotor 1 (position A) with a size e 1 and ends at position B with a maximum value e n . The eccentricity e thus increases in the longitudinal direction of the rotor 1, that is to say from the larger cross section to the smaller cross section d. In the Figures 3b and 3c the respective views A: A and B: B are shown, which enable the top view of the end or the beginning of the rotor 1. The Figure 3b it can be seen that the eccentricity e 1 at the beginning of the rotor 1, at the point A with the cross section d 1, is significantly less than the eccentricity e n, which is located in FIG Figure 3c which shows a view (view B: B) of the rotor end. The Figure 3c it can also be seen that the cross section d 2 is also smaller than the cross section d 1 .

In der Fig. 4a ist eine erfindungsgemäße Exzenterschneckenpumpe 100 dargestellt, die einen Rotor 1 und einen Stator 2 aufweist. Zwischen Rotor 1 und Stator 2 sind verschiedene Kammervolumina V3, V4, V5 ... Vn der Kammern 3, 4, 5...n zu erkennen, die erfindngsgemäß alle gleichgroß sind. Die gleiche Größe der soeben aufgeführten Volumina resultiert daraus, dass sowohl der Rotor 1 eine vorbestimmte Konizität und daran eine daran angepasste Exzentrizität, Steigung und/oder Querschnitt des Rotors 1 aufweist, der von dem entsprechend ausgeformten Stator 2 umgeben wird. Damit der Transport eines flüssigen abrasiven und/oder hochviskosen Mediums durch die Exzenterschneckenpumpe 100 erfolgen kann, ist zwischen dem Stator 2 und dem Rotor 1 eine Dichtlinie D gebildet, entlang derer der notwendige Druck aufgebaut wird, der notwendig ist, um das abrasive, hochviskose Medium unter Druck durch die Exzenterschneckenpumpe 100 zu transportieren. Durch die Drehbewegung des Rotors 1 wandert diese Dichtlinie im Wesentlichen spiralförmig entlang der Längsrichtung L in Richtung des Ausgangs der erfindungsgemäßen Exzenterschneckenpumpe 100 und bewegt das zu transportierende Medium in Richtung des Pumpenausgangs. Das zu transportierende Medium das sich innerhalb der Volumina befindet wird dabei in Richtung des Ausgangs der erfindungsgemäßen Exzenterschneckenpumpe 100 bewegt. Der Antrieb der erfindungsgemäßen Exzenterschneckenpumpe 100 kann z. B. über einen Elektromotor erfolgen, der an dem Ende (Position A) der erfindungsgemäßen Exzenterschneckenpumpe angeordnet ist, die den Querschnitt d1 aufweist und an dieser Stelle den Rotor 1 dreht. Fig. 4a ist ebenfalls zu entnehmen, dass der Querschnitt d1 zu Beginn des Rotors 1 größer ist als der Querschnitt d2 zum Ende des Rotors 1. Hiermit geht einher, dass auch die Exzentrizität der erfindungsgemäßen Exzenterschneckenpumpe 100 zu Beginn, das heißt im Bereich des Eintritts in die Exzenterschneckenpumpe (Position A) geringer ist als zum Ende (Position B), das heißt zum Austrittsende des Mediums der Exzenterschneckenpumpe 100 hin. Die Exzentrizität am Eingang der Exzenterschneckenpumpe (Position A) ist mit e1 gekennzeichnet und die Exzentrizität am Ausgang (Position B) der erfindungsgemäßen Exzenterschneckenpumpe 100 ist mit en gekennzeichnet. Die Ansichten auf den Eingangsbereich bzw. den Endbereich der erfindungsgemäßen Exzenterschneckenpumpe 100, die in den Fig. 4b und 4c dargestellt sind zeigen ebenfalls noch einmal deutlich, dass die Exzentrizität in Längsrichtung L der erfindungsgemäßen Exzenterschneckenpumpe 100, bzw. in Längsrichtung L des Rotors 1 zunimmt, sodass e1 kleiner ist als en. Damit geht einher, dass auch der Querschnitt d1 zu Beginn des Rotors größer ist als der Querschnitt d2 des Rotors 1 im Endbereich der Exzenterschneckenpumpe 100. In den Fig. 4a bis 4c ist eine Exzenterschneckenpumpe 100 gezeigt, bei der sowohl der Querschnitt des Rotors 1 als auch die Exzentrizität e des Rotors 1 verändert wurde.In the Figure 4a an eccentric screw pump 100 according to the invention is shown, which has a rotor 1 and a stator 2. Different chamber volumes V 3 , V 4 , V 5 ... V n of the chambers 3, 4, 5 ... n can be seen between the rotor 1 and the stator 2, which according to the invention are all the same size. The same size of the volumes just listed results from the fact that both the rotor 1 has a predetermined Conicity and an eccentricity, pitch and / or cross section of the rotor 1 adapted to it, which is surrounded by the correspondingly shaped stator 2. So that the transport of a liquid abrasive and / or highly viscous medium can take place through the eccentric screw pump 100, a sealing line D is formed between the stator 2 and the rotor 1, along which the necessary pressure is built up that is necessary to circulate the abrasive, highly viscous medium to be transported under pressure through the eccentric screw pump 100. As a result of the rotary movement of the rotor 1, this sealing line migrates essentially spirally along the longitudinal direction L in the direction of the outlet of the eccentric screw pump 100 according to the invention and moves the medium to be transported in the direction of the pump outlet. The medium to be transported, which is located within the volumes, is moved in the direction of the outlet of the eccentric screw pump 100 according to the invention. The drive of the eccentric screw pump 100 according to the invention can, for. B. via an electric motor which is arranged at the end (position A) of the eccentric screw pump according to the invention, which has the cross section d 1 and rotates the rotor 1 at this point. Figure 4a It can also be seen that the cross-section d 1 at the beginning of the rotor 1 is larger than the cross-section d 2 at the end of the rotor 1. This is associated with the fact that the eccentricity of the eccentric screw pump 100 according to the invention at the beginning, i.e. in the area of the entry into the eccentric screw pump (position A) is less than towards the end (position B), that is to say towards the outlet end of the medium of the eccentric screw pump 100. The eccentricity at the inlet of the eccentric screw pump (position A) is marked with e 1 and the eccentricity at the outlet (position B) of the eccentric screw pump 100 according to the invention is marked with e n . The views of the input area and the end area of the eccentric screw pump 100 according to the invention, which are shown in FIGS Figures 4b and 4c also clearly show once again that the eccentricity increases in the longitudinal direction L of the eccentric screw pump 100 according to the invention or in the longitudinal direction L of the rotor 1, so that e 1 is smaller than e n . This goes hand in hand with the fact that the cross section d 1 at the beginning of the rotor is also greater than the cross section d 2 of the rotor 1 in the end region of the eccentric screw pump 100 Figures 4a to 4c an eccentric screw pump 100 is shown in which both the cross section of the rotor 1 and the eccentricity e of the rotor 1 have been changed.

Die Fig. 5a bis 5c zeigen eine weitere mögliche Ausführungsform der erfindungsgemäßen Exzenterschneckenpumpe 100, die sich von der in den Fig. 4a bis 4c gezeigten Exzenterschneckenpumpe 100 dadurch unterscheidet, dass der Querschnitt d1 des Rotors 1 in Längsrichtung L des Rotors 1 nicht verändert wird. Um die Volumina V3, V4, V5 bis Vn trotzdem gleichgroß zu halten, wurde bei dieser Ausführungsform einer erfindungsgemäßen Exzenterschneckenpumpe 100 die Steigung h des Rotors bzw. des Stators in Längsrichtung L der erfindungsgemäßen Exzenterschneckenpumpe verändert. Insbesondere der Fig. 5a ist zu entnehmen, dass die Steigung h in Längsrichtung L der erfindungsgemäßen Exzenterschneckenpumpe 100 abnimmt. Die Fig. 5b bzw. 5c zeigen die Ansichten entlang der Linie A:A bzw. B:B aus Fig. 5a, nämlich die Ansichten auf das Eintrittsende bzw. das Austrittsende dieser Ausführungsform der erfindungsgemäßen Exzenterschneckenpumpe 100. Es zeigt sich, dass die Exzentrizität e1 am Eintrittsende der Exzenterschneckenpumpe größer ist als die Exzentrizität en im Austrittsbereich. In den Fig. 6a bis 6c ist ebenfalls eine weitere Ausführungsform der erfindungsgemäßen Exzenterschneckenpumpe 100 dargestellt, die sich von der in den Fig. 4a bis 4c dargestellten Exzenterschneckenpumpe dahingehend unterscheidet, dass bei dieser Ausführungsform sowohl der Querschnitt als auch die Steigung des Rotors bzw. des Stators verändert wurden.The Figures 5a to 5c show a further possible embodiment of the eccentric screw pump 100 according to the invention, which differs from that in FIGS Figures 4a to 4c The eccentric screw pump 100 shown differs in that the cross section d 1 of the rotor 1 in the longitudinal direction L of the rotor 1 is not changed. In order to keep the volumes V 3 , V 4 , V 5 to V n the same, in this embodiment of an eccentric screw pump 100 according to the invention, the pitch h of the rotor or stator in the longitudinal direction L of the eccentric screw pump according to the invention was changed. In particular the Figure 5a it can be seen that the slope h decreases in the longitudinal direction L of the eccentric screw pump 100 according to the invention. The Figure 5b and 5c show the views along the line A: A and B: B, respectively Figure 5a , namely the views of the inlet end and the outlet end of this embodiment of the Eccentric screw pump 100 according to the invention. It can be seen that the eccentricity e 1 at the inlet end of the eccentric screw pump is greater than the eccentricity e n in the outlet area. In the Figures 6a to 6c a further embodiment of the eccentric screw pump 100 according to the invention is also shown, which differs from that shown in FIGS Figures 4a to 4c The eccentric screw pump shown differs in that, in this embodiment, both the cross section and the pitch of the rotor or the stator have been changed.

Insbesondere den Fig. 6b und 6c ist zu entnehmen, dass der Querschnitt des Rotors 1 im Einlassbereich der Exzenterschneckenpumpe größer ist als der Querschnitt des Rotors 1 im Auslassbereich der Exzenterschneckenpumpe.In particular the Figures 6b and 6c it can be seen that the cross section of the rotor 1 in the inlet area of the eccentric screw pump is larger than the cross section of the rotor 1 in the outlet area of the eccentric screw pump.

In den Fig. 7a bis 7c ist eine weitere Variante der erfindungsgemäßen Exzenterschneckenpumpe dargestellt, bei der sowohl die Exzentrizität, der Querschnitt und die Steigung des Rotors bzw. des Stators verändert wurden, wobei die einzelnen Volumina V3, V4, V5 konstant gehalten wurden. Insbesondere der Fig. 7a lässt sich entnehmen, dass die Steigung h in Längsrichtung L der erfindungsgemäßen Exzenterschneckenpumpe abnimmt. Die Veränderung hinsichtlich des Querschnitts des Rotors 1 sowie der Exzentrizität e zeigen die Fig. 7b und 7c.In the Figures 7a to 7c Another variant of the eccentric screw pump according to the invention is shown in which both the eccentricity, the cross section and the pitch of the rotor or the stator have been changed, the individual volumes V 3 , V 4 , V 5 being kept constant. In particular the Figure 7a it can be seen that the slope h decreases in the longitudinal direction L of the eccentric screw pump according to the invention. The change in terms of the cross section of the rotor 1 and the eccentricity e show Figures 7b and 7c .

BezugszeichenlisteList of reference symbols

100100
ExzenterschneckenpumpeEccentric screw pump
11
Rotorrotor
22
Statorstator
33
Kammerchamber
44th
Kammerchamber
55
Kammerchamber
nn
Kammerchamber
e1 e 1
Exzentrizitäteccentricity
e2 e 2
Exzentrizitäteccentricity
e3 e 3
Exzentrizitäteccentricity
en e n
Exzentrizitäteccentricity
V1 V 1
Volumenvolume
V2 V 2
Volumenvolume
V3 V 3
Volumenvolume
Vn V n
Volumenvolume
LL.
LängsrichtungLongitudinal direction
hH
Steigungpitch
dd
Querschnittcross-section

Claims (6)

  1. Eccentric screw pump (100) for delivering thick-flowing, highly viscous and/or abrasive media with a longitudinal direction (L), at least having a conical, helically wound rotor (1) with at least one start, which rotor has a lead (h), has at least one eccentricity (e1, e2, e3,..., en) and has at least one cross section (d) and is rotatably arranged in a conical stator (2) with one or more starts,
    - in which a plurality of at least three chambers (3, 4, 5,..., n), each with a volume (V3, V4, V5, ..., Vn), is formed between the rotor (1) and the stator (2), which chambers serve for delivering the medium,
    - in which the chambers (3, 4, 5,..., n) between the stator (2) and the rotor (1) are bound by a sealing line (D), and the volumes (V3, V4, V5,..., Vn) of each individual chamber (3, 4, 5,..., n) between the stator (2) and the rotor (1) are of equal size,
    characterized in that, in the longitudinal direction (L), the eccentricity (e1, e2, e3,..., en) of the rotor (1) increases and the cross section (d) of the rotor (1) decreases, and in that the eccentric screw pump, in the event of any signs of wear, is able to be adjusted by longitudinal displacement of the rotor (1) in relation to the stator (2), so that the chamber volume can be kept identical.
  2. Eccentric screw pump (100) according to Claim 1, characterized in that the lead (h) of the rotor (1) decreases in the longitudinal direction (L) of the rotor (1).
  3. Eccentric screw pump (100) according to Claim 1 or 2, characterized in that the rotor (1) has, as wear protection, a coating, for example with chromium, with a ceramic material or with other materials.
  4. Eccentric screw pump (100) according to one or more of the preceding claims, characterized in that the stator (2) and/or the rotor (1) consist of an elastomer or a solid.
  5. Eccentric screw pump (100) according to one or more of the preceding claims, characterized in that the stator has a stator shell which has a conical shape.
  6. Eccentric screw pump (100) according to one or more of the preceding claims, characterized in that the stator (2) has a uniform plastic wall thickness.
EP10711641.0A 2009-03-02 2010-03-02 Eccentric screw pump Revoked EP2404061B1 (en)

Priority Applications (1)

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PL10711641T PL2404061T3 (en) 2009-03-02 2010-03-02 Eccentric screw pump

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DE202009002823U DE202009002823U1 (en) 2009-03-02 2009-03-02 Cavity Pump
PCT/EP2010/052597 WO2010100134A2 (en) 2009-03-02 2010-03-02 Eccentric screw pump

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EP2404061A2 EP2404061A2 (en) 2012-01-11
EP2404061B1 true EP2404061B1 (en) 2020-11-11

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US (1) US9109595B2 (en)
EP (1) EP2404061B1 (en)
CA (1) CA2754139C (en)
DE (1) DE202009002823U1 (en)
DK (1) DK2404061T3 (en)
ES (1) ES2846680T3 (en)
PL (1) PL2404061T3 (en)
PT (1) PT2404061T (en)
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WO (1) WO2010100134A2 (en)

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Also Published As

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DE202009002823U1 (en) 2009-07-30
RU2535795C2 (en) 2014-12-20
CA2754139C (en) 2018-07-24
ES2846680T3 (en) 2021-07-28
US20110305589A1 (en) 2011-12-15
PT2404061T (en) 2021-01-29
WO2010100134A3 (en) 2010-12-29
PL2404061T3 (en) 2021-06-28
CA2754139A1 (en) 2010-09-10
DK2404061T3 (en) 2021-02-08
RU2011139951A (en) 2013-04-10
US9109595B2 (en) 2015-08-18
WO2010100134A2 (en) 2010-09-10
EP2404061A2 (en) 2012-01-11

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