EP2404061A2 - Eccentric screw pump - Google Patents

Eccentric screw pump

Info

Publication number
EP2404061A2
EP2404061A2 EP10711641A EP10711641A EP2404061A2 EP 2404061 A2 EP2404061 A2 EP 2404061A2 EP 10711641 A EP10711641 A EP 10711641A EP 10711641 A EP10711641 A EP 10711641A EP 2404061 A2 EP2404061 A2 EP 2404061A2
Authority
EP
European Patent Office
Prior art keywords
rotor
eccentric screw
screw pump
stator
longitudinal direction
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
EP10711641A
Other languages
German (de)
French (fr)
Other versions
EP2404061B1 (en
Inventor
Ralf Daunheimer
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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Application filed by Individual filed Critical Individual
Priority to PL10711641T priority Critical patent/PL2404061T3/en
Publication of EP2404061A2 publication Critical patent/EP2404061A2/en
Application granted granted Critical
Publication of EP2404061B1 publication Critical patent/EP2404061B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, at least comprising a conical, helically wound, at least catchy rotor with a pitch h, with at least one eccentricity e and at least one cross-section d, the in a single- or multi-start conical stator, rotatably arranged, in which between the rotor and stator, a plurality of chambers each having a volume is formed, which serve to convey the medium and in which limits the chambers between the stator and rotor by a sealing line D. are.
  • the invention further relates to an eccentric screw pump, in particular for conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, at least comprising a stepped, helically wound, at least catchy 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-stage staircase-shaped stator.
  • Eccentric screw pumps are well known in the art, so z. B. in DE 633 784 a Eccentric screw pump, in which two helical elements are in one another and in which the outer element has a helix or tooth more than the inner element and in which the pitches of the helical turns of the two elements behave like the gait or tooth numbers, but constant, may be increasing or decreasing, wherein at least three cooperating helical elements are provided, of which the middle has one tooth more than the interior and one tooth less than the exterior.
  • an eccentric screw pump with a conical worm shaft and a housing insert is known, which is characterized in that the eccentric screw shaft has a round, cylindrical base cross-section and a conically rising conical outer diameter, and that the conically wound inner hollow screw with the double pitch of the eccentric screw shaft, causing a conical, hypocycloidal rolling of the eccentric screw shaft on the inner shell of the conical, helical hollow screw.
  • a problem with the progressing cavity pumps of the prior art is that with progressive cavity pumps which have a plurality of chambers, wear phenomena may result in so-called cavitation when the pump is operated by increasing the chamber volume, resulting in that the delivery rate of such an eccentric screw pump is no longer optimal.
  • the eccentric screw pump according to the invention is characterized in that the volumes of each individual chamber between the stator and rotor are the same size.
  • the cross-section d of the rotor decreases in the longitudinal direction of the rotor.
  • About the decrease of the cross section may e.g. with varying change in eccentricity, the chamber volume kept constant.
  • the eccentricity of the rotor in the longitudinal direction L increases or decreases
  • 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. Due to the variations of the parameters described above, the pump power of the eccentric screw pump according to the invention can be further optimized, or adapted to the corresponding needs, which are for example specified by the material to be conveyed.
  • the rotor as wear protection, a coating, for. B. with chromium, with a ceramic material or other materials.
  • stator and / or rotor may consist of an elastomer or a solid. Again, it is possible, depending on the intended application for the eccentric screw according to the invention to provide the appropriate material for the stator and / or rotor.
  • the stator may also comprise an annular or tubular stator shell made of a different material.
  • This stator jacket can be used to protect the stator and thus to increase the service life of the eccentric screw pump.
  • the stator jacket is conically shaped.
  • the stator has a uniform plastic wall thickness.
  • FIG. 1a the longitudinal section through the rotor of an eccentric screw pump according to the invention
  • FIG. 1b shows the view of the rotor of an eccentric screw pump according to the invention at position A;
  • FIG. 1c shows a further view of a rotor of an eccentric screw pump according to the invention at point B;
  • FIG. 3a shows the longitudinal section through a further embodiment of the eccentric screw pump according to the invention
  • 3b shows the view of the rotor of an eccentric screw pump according to the invention at the position A;
  • 3c shows the view of the rotor on the rotor of an eccentric screw pump according to the invention at position B;
  • FIG. 4a shows the longitudinal section through the rotor and stator of an eccentric screw pump according to the invention
  • FIG. 4b shows the view of an eccentric screw pump according to the invention at position A
  • FIG. 4a shows the longitudinal section through the rotor and stator of an eccentric screw pump according to the invention
  • FIG. 4b shows the view of an eccentric screw pump according to the invention at position A
  • FIG. 4b shows the view of an eccentric screw pump according to the invention at position A
  • FIG. 4c shows the view of an eccentric screw pump according to the invention at position B;
  • 5a shows the longitudinal section through an eccentric screw pump according to the invention of a further embodiment
  • FIG. 5b shows the view of an eccentric screw pump according to the invention at position A;
  • 5c shows the view of an eccentric screw pump according to the invention at position B;
  • FIG. 6a shows the longitudinal section through a further embodiment of the eccentric screw pump according to the invention.
  • FIG. 6b shows the view of an eccentric screw pump according to the invention at position A;
  • FIG. 6c shows the view of an eccentric screw pump according to the invention at position B;
  • FIG. 7a shows the longitudinal section through a further embodiment of an eccentric screw pump according to the invention.
  • FIG. 7b shows the view of an eccentric screw pump according to the invention at position A;
  • FIG. 1 shows a rotor 1 of an eccentric screw according to the invention in longitudinal section.
  • the rotor 1 has a pitch h and an eccentricity ei at the beginning of the rotor 1 and an eccentricity e n to the end of the rotor 1.
  • the eccentricity of the rotor 1 increases, so that the dimension e n is greater than the measure egg.
  • the view A A is shown on the starting end of the rotor 1.
  • the rotor 1 has a cross-section di on and also recognizable in this view eccentricity ei.
  • Fig. Ic shows the view B: B of Fig.
  • FIGS. 1 and 2 show the stator 2 of an eccentric screw pump according to the invention.
  • the rotor 1 described above from Fig. Ia can be introduced and thus forms the eccentric screw pump according to the invention, which is characterized in that the individual volumes which are present for the transport of the medium in the longitudinal direction L of the rotor are the same size.
  • the longitudinal view of Fig. 2 can be clearly see the conicity of the stator and the matching thereinto rotor. Due to the conicity of stator 2 and rotor 1 and the corresponding adjustment of pitch, cross-section and / or eccentricity, it is possible to keep the individual volumes of the chambers located in the eccentric screw pump according to the invention constant.
  • FIGS. 1 shows the stator 2 of an eccentric screw pump according to the invention.
  • FIG. 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 di, which is larger than the cross-section of the rotor 1 at its end (view B: B), which is marked with the dimension d2.
  • view B: B Along the longitudinal direction L of the rotor 1 can be seen a decrease in the cross section of the rotor, which results in that the rotor 1 has a conical shape.
  • the eccentricity e of the rotor starts at the beginning of the rotor 1 (position A) with a size ei and ends at the 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.
  • FIGS. 3b and 3c the respective views A: A and B: B are shown, which make it possible to observe the end or the beginning of the rotor 1.
  • the eccentricity ei at the beginning of the rotor 1, at the point A with the cross-section di is significantly lower than the eccentricity e n , which in Fig. 3c, the one view (view B: B) on the rotor end, shows.
  • the cross section d2 is also smaller than the cross section di.
  • FIG. 4 a shows an eccentric screw pump 100 according to the invention, which has a rotor 1 and a stator 2. Between the rotor 1 and the stator 2 different chamber volumes V3, V 4 , V 5 ... V n of the chambers 3, 4, 5 ... n can be seen, which according to the invention are all the same size. The same size of the volumes just mentioned results from the fact that both the rotor 1 agreed taper and it has adapted thereto eccentricity, pitch and / or cross section of the rotor 1, 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, which is necessary to the abrasive, highly viscous medium under pressure by the eccentric screw pump 100 to transport. Due to the rotational movement of the rotor 1, this sealing line travels substantially helically 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 thereby 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. Example, 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 di and rotates at this point the rotor 1. It can also be seen that the cross-section di at the beginning of the rotor 1 is greater than the cross-section d2 to the end of the rotor 1. This is accompanied by the fact that the eccentricity of the eccentric screw pump 100 according to the invention at the beginning, that is in the region of entry in the eccentric screw pump (position A) is lower than the end (position B), that is to the outlet end of the medium of the eccentric screw pump 100 out.
  • the eccentricity at the inlet of the eccentric screw pump (position A) is marked with ei net and the eccentricity at the output (position B) of the eccentric screw pump 100 according to the invention is marked with e n .
  • the views of the entrance area or the end area of the eccentric screw pump 100 according to the invention which are shown in FIGS. 4b and 4c, likewise 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 ei is smaller than e n . This is associated with the fact that the cross-section di at the beginning of the rotor is greater than the cross-section d2 of the rotor 1 in the end of the eccentric screw pump 100.
  • Figs. 4a to 4c an eccentric screw pump 100 is shown in which both the cross section of the rotor 1 as also the eccentricity e of the rotor 1 has been changed.
  • FIGS. 5a to 5c show a further possible embodiment of the eccentric screw pump 100 according to the invention, which differs from the eccentric screw pump 100 shown in FIGS. 4a to 4c in that the cross section di of the rotor 1 in the longitudinal direction L of the rotor 1 is not changed.
  • V n to keep the volumes V3, V 4, V 5, the same size
  • an eccentric screw pump according to the invention was 100, the pitch h of the rotor or the stator in the longitudinal direction L of the eccentric screw pump according to the invention modified in this embodiment.
  • Fig. 5a it can be seen that the slope h in the longitudinal direction L of the eccentric screw pump 100 according to the invention decreases.
  • FIGS. 6a to 6c respectively show the views along the line A: A and B: B from FIG. 5a, namely the views on the inlet end and the outlet end of this embodiment of FIG It can be seen that the eccentricity ei at the inlet end of the eccentric screw pump is greater than the eccentricity e n in the outlet region.
  • FIGS. 6a to 6c likewise show a further embodiment of the eccentric screw pump 100 according to the invention, which differs from the eccentric screw pump shown in FIGS. 4a to 4c in that in this embodiment both the cross section and the pitch of the rotor or of the rotor Stators were changed.
  • FIGS. 6b and 6c it can be seen that the cross section of the rotor 1 in the inlet region of the eccentric screw pump is greater than the cross section of the rotor 1 in the outlet region of the eccentric screw pump.
  • FIGS. 7a to 7c A further variant of the eccentric screw pump according to the invention is shown in FIGS. 7a to 7c, 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 were.
  • Fig. 7a 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 the cross section of the rotor 1 and the eccentricity e are shown in FIGS. 7b and 7c.

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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 invention relates to an eccentric screw pump (100), in particular for conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, having a conical, helically wound, at least single-start rotor (1) having a gradient h, having at least one eccentricity (e1, e2, e3,…en) and at least one cross-section d that is rotatably arranged in a single or multi-start conical stator (2) wherein a plurality of chambers (3, 4, 5…n) each having a volume (V3, V4, V5…Vn) is formed between the rotor (1) and stator (2) that serve to convey the medium and wherein the chambers (3, 4, 5…n) between the stator and the rotor are limited by a sealing line D. The volumes (V3, V4, V5…Vn) of each individual chamber (3, 4, 5…n) between the stator (2) and the rotor (1) are equal.

Description

Exzenterschneckenpumpe Cavity Pump
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 conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, at least comprising a conical, helically wound, at least catchy rotor with a pitch h, with at least one eccentricity e and at least one cross-section d, the in a single- or multi-start conical stator, rotatably arranged, in which between the rotor and stator, a plurality of chambers each having a volume is formed, which serve to convey the medium and in which limits the chambers between the stator and rotor by a sealing line D. are. The invention further relates to an eccentric screw pump, in particular for conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, at least comprising a stepped, helically wound, at least catchy 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-stage 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 well known in the art, so z. B. in DE 633 784 a Eccentric screw pump, in which two helical elements are in one another and in which the outer element has a helix or tooth more than the inner element and in which the pitches of the helical turns of the two elements behave like the gait or tooth numbers, but constant, may be increasing or decreasing, wherein at least three cooperating helical elements are provided, of which the middle has one tooth more than the interior and one tooth less than the exterior.
Aus der DE 27 36 590 Al 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 Innen- hohlschnecke mit der doppelten Steigung der Exzenterschneckenwelle, ein konisch, hypozykloides Abrollen der Exzenterschneckenwelle auf dem Innenmantel der konischen, gewundenen Hohlschnecke bewirkt.From DE 27 36 590 Al an eccentric screw pump with a conical worm shaft and a housing insert is known, which is characterized in that the eccentric screw shaft has a round, cylindrical base cross-section and a conically rising conical outer diameter, and that the conically wound inner hollow screw with the double pitch of the eccentric screw shaft, causing a conical, hypocycloidal rolling of the eccentric screw shaft on the inner shell of the conical, helical hollow screw.
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.A problem with the progressing cavity pumps of the prior art is that with progressive cavity pumps which have a plurality of chambers, wear phenomena may result in so-called cavitation when the pump is operated by increasing the chamber volume, resulting in 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 an object of the invention to provide an eccentric screw pump that can be easily adjusted when worn, so optimal pumping performance can always be expected and replacement of the stator and / or rotor is less often required.
Zur Problemlösung zeichnet sich die erfindungsgemäße Exzenterschneckenpumpe dadurch aus, dass die Volumina jeder einzelnen Kammer zwischen Stator und Rotor gleichgroß sind.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 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 inventive design of an eccentric screw pump, it can be made possible that the pump always has the maximum possible delivery capacity. In case of signs of wear z. B. the rotor shaft or the stator are moved in the longitudinal direction, so that the chamber volume is equal again and the pump power 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. About the decrease of the cross section may e.g. with varying change in eccentricity, the chamber volume kept constant.
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. 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.In addition, further embodiments are possible, namely that the pitch h of the rotor decreases with 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 in the longitudinal direction L increases or decreases 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. It is also possible that, in an eccentric screw pump according to the invention, the eccentricity of the rotor in the longitudinal direction L increases or decreases, the pitch h of the rotor increases or decreases in the longitudinal direction L and the rotor has a decreasing or increasing cross section d in the longitudinal direction. Due to the variations of the parameters described above, the pump power of the eccentric screw pump according to the invention can be further optimized, or adapted to the corresponding needs, which are for example specified by the material to be conveyed.
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, it is possible due to these variations, progressing cavity pumps for a variety of applications, namely application areas in which thick, highly viscous and / or abrasive media must be transported to provide.
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 as wear protection, a coating, for. B. with chromium, 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 stator and / or rotor may consist of an elastomer or a solid. Again, it is possible, depending on the intended application for the eccentric screw according to the invention to provide the appropriate material for the stator and / or rotor.
Vorteilhafterweise kann ebenfalls der Stator einen aus einem anderen Material bestehenden ring- oder röhrenförmigen Statormantel aufweisen. Dieser Statormantel kann zum Schütze des Stators und damit zur Erhöhung der Standdauer der Exzenterschneckenpumpe eingesetzt werden. Vor- teilhafterweise ist dabei der Statormantel konisch geformt .Advantageously, the stator may also comprise an annular or tubular stator shell made of a different material. This stator jacket can be used to protect the stator and thus to increase the service life of the eccentric screw pump. In front- Partially, the stator jacket is conically shaped.
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:Reference to a drawing, an embodiment of the invention will be explained in more detail. Show it:
Fig. Ia den Längschnitt durch den Rotor einer erfindungsgemäßen Exzenterschneckenpumpe;FIG. 1a the longitudinal section through the rotor of an eccentric screw pump according to the invention; FIG.
Fig. Ib die Ansicht des Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;FIG. 1b shows the view of the rotor of an eccentric screw pump according to the invention at position A; FIG.
Fig. Ic eine weitere Ansicht eines Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Stelle B;1c shows a further view of a rotor of an eccentric screw pump according to the invention at point B;
Fig. 2 den Längsschnitt durch eine erfindungsgemäße Exzenterschneckenpumpe;2 shows the longitudinal section through an eccentric screw pump according to the invention;
Fig. 3a den Längsschnitt durch eine weitere Ausführungsform der erfindungsgemäßen Exzenterschneckenpumpe;3a shows the longitudinal section through a further embodiment of the eccentric screw pump according to the invention;
Fig. 3b die Ansicht des Rotors einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;3b shows the view of the rotor of an eccentric screw pump according to the invention at the position A;
Fig. 3c die Ansicht des Rotors auf den Rotor einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;3c shows the view of the rotor on the rotor of an eccentric screw pump according to the invention at position B;
Fig. 4a den Längsschnitt durch Rotor und Stator einer erfindungsgemäßen Exzenterschneckenpumpe; Fig. 4b die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;4a shows the longitudinal section through the rotor and stator of an eccentric screw pump according to the invention; FIG. 4b shows the view of an eccentric screw pump according to the invention at position A; FIG.
Fig. 4c die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;4c shows the view of an eccentric screw pump according to the invention at position B;
Fig. 5a den Längsschnitt durch eine erfindungsgemäße Exzenterschneckenpumpe einer weiteren Ausführungsform;5a shows the longitudinal section through an eccentric screw pump according to the invention of a further embodiment;
Fig. 5b die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;FIG. 5b shows the view of an eccentric screw pump according to the invention at position A; FIG.
Fig. 5c die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;5c shows the view of an eccentric screw pump according to the invention at position B;
Fig. 6a den Längsschnitt durch eine weitere Ausführungsform der Erfindungsgemäßen Exzenterschneckenpumpe;6a shows the longitudinal section through a further embodiment of the eccentric screw pump according to the invention;
Fig. 6b die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A;FIG. 6b shows the view of an eccentric screw pump according to the invention at position A; FIG.
Fig. 6c die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B;FIG. 6c shows the view of an eccentric screw pump according to the invention at position B; FIG.
Fig. 7a den Längsschnitt durch eine weitere Ausführungsform einer erfindungsgemäßen Exzenterschneckenpumpe;7a shows the longitudinal section through a further embodiment of an eccentric screw pump according to the invention;
Fig. 7b die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position A; undFIG. 7b shows the view of an eccentric screw pump according to the invention at position A; FIG. and
Fig. 7c die Ansicht einer erfindungsgemäßen Exzenterschneckenpumpe an der Position B. Fig. 1 zeigt einen Rotor 1 einer erfindungsgemäßen Exzenterschneckenpumpe im Längsschnitt. Der Rotor 1 weist eine Steigung h auf sowie eine Exzentrizität ei 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 ei. In Fig. Ib ist die Ansicht A: A auf das Anfangsende des Rotors 1 dargestellt. Der Rotor 1 weist einen Querschnitt di auf und die auch in dieser Ansicht erkennbare Exzentrizität ei.Fig. Ic zeigt die Ansicht B:B aus Fig. Ia, in der zu erkennen ist, dass der Querschnitt dn am Ende des Rotors 1 geringer ist als der Querschnitt di am Beginn des Rotors 1. Zu erkennen ist auch, dass die Exzentrizität im Verlauf des Rotors 1 in Längsrichtung L zunimmt .7c, the view of an eccentric screw pump according to the invention at position B. Fig. 1 shows a rotor 1 of an eccentric screw according to the invention in longitudinal section. The rotor 1 has a pitch h and an eccentricity ei at the beginning of the rotor 1 and an eccentricity e n to 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 measure egg. In Fig. Ib the view A: A is shown on the starting end of the rotor 1. The rotor 1 has a cross-section di on and also recognizable in this view eccentricity ei.Fig. Ic shows the view B: B of Fig. Ia, in which it can be seen that the cross-section d n at the end of the rotor 1 is less than the cross-section di at the beginning of the rotor 1. It can also be seen that the eccentricity in the course of the rotor 1 increases in the longitudinal direction L.
Fig. 2 zeigt den Stator 2 einer erfindungsgemäßen Exzenterschneckenpumpe. In diesen Stator 2 kann der zuvor beschriebene Rotor 1 aus Fig. Ia 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. 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 di 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 ei 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 ei am Beginn des Rotors 1, an der Stelle A mit dem Querschnitt di 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 di .2 shows the stator 2 of an eccentric screw pump according to the invention. In this stator 2, the rotor 1 described above from Fig. Ia can be introduced and thus forms the eccentric screw pump according to the invention, which is characterized in that the individual volumes which are present for the transport of the medium in the longitudinal direction L of the rotor are the same size. In the longitudinal view of Fig. 2 can be clearly see the conicity of the stator and the matching thereinto rotor. Due to the conicity of stator 2 and rotor 1 and the corresponding adjustment of pitch, cross-section and / or eccentricity, it is possible to keep the individual volumes of the chambers located 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. At its beginning (view A: A), the rotor 1 has a cross-section di, which is larger than the cross-section of the rotor 1 at its end (view B: B), which is marked with the dimension d2. Along the longitudinal direction L of the rotor 1 can be seen a decrease in the cross section of the rotor, which results in that the rotor 1 has a conical shape. The eccentricity e of the rotor starts at the beginning of the rotor 1 (position A) with a size ei and ends at the 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 FIGS. 3b and 3c, the respective views A: A and B: B are shown, which make it possible to observe the end or the beginning of the rotor 1. 3b, it can be seen that the eccentricity ei at the beginning of the rotor 1, at the point A with the cross-section di is significantly lower than the eccentricity e n , which in Fig. 3c, the one view (view B: B) on the rotor end, shows. It can also be seen from FIG. 3c that the cross section d2 is also smaller than the cross section di.
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 vorbe- stimmte 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 di aufweist und an dieser Stelle den Rotor 1 dreht. Fig. 4a ist ebenfalls zu entnehmen, dass der Querschnitt di 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 ei gekennzeich- net 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 ei kleiner ist als en. Damit geht einher, dass auch der Querschnitt di 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.FIG. 4 a shows an eccentric screw pump 100 according to the invention, which has a rotor 1 and a stator 2. Between the rotor 1 and the stator 2 different chamber volumes V3, V 4 , V 5 ... V n of the chambers 3, 4, 5 ... n can be seen, which according to the invention are all the same size. The same size of the volumes just mentioned results from the fact that both the rotor 1 agreed taper and it has adapted thereto eccentricity, pitch and / or cross section of the rotor 1, which is surrounded by the correspondingly shaped stator 2. So that the transport of a liquid abrasive and / or highly viscous medium can be carried out by 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, which is necessary to the abrasive, highly viscous medium under pressure by the eccentric screw pump 100 to transport. Due to the rotational movement of the rotor 1, this sealing line travels substantially helically 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 thereby 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. Example, 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 di and rotates at this point the rotor 1. It can also be seen that the cross-section di at the beginning of the rotor 1 is greater than the cross-section d2 to the end of the rotor 1. This is accompanied by the fact that the eccentricity of the eccentric screw pump 100 according to the invention at the beginning, that is in the region of entry in the eccentric screw pump (position A) is lower than the end (position B), that is to the outlet end of the medium of the eccentric screw pump 100 out. The eccentricity at the inlet of the eccentric screw pump (position A) is marked with ei net and the eccentricity at the output (position B) of the eccentric screw pump 100 according to the invention is marked with e n . The views of the entrance area or the end area of the eccentric screw pump 100 according to the invention, which are shown in FIGS. 4b and 4c, likewise 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 ei is smaller than e n . This is associated with the fact that the cross-section di at the beginning of the rotor is greater than the cross-section d2 of the rotor 1 in the end of the eccentric screw pump 100. In Figs. 4a to 4c, an eccentric screw pump 100 is shown in which both the cross section of the rotor 1 as also the eccentricity e of the rotor 1 has 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 di 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 ei 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.FIGS. 5a to 5c show a further possible embodiment of the eccentric screw pump 100 according to the invention, which differs from the eccentric screw pump 100 shown in FIGS. 4a to 4c in that the cross section di of the rotor 1 in the longitudinal direction L of the rotor 1 is not changed. In order to nevertheless V n to keep the volumes V3, V 4, V 5, the same size, an eccentric screw pump according to the invention was 100, the pitch h of the rotor or the stator in the longitudinal direction L of the eccentric screw pump according to the invention modified in this embodiment. In particular, Fig. 5a it can be seen that the slope h in the longitudinal direction L of the eccentric screw pump 100 according to the invention decreases. FIGS. 5b and 5c respectively show the views along the line A: A and B: B from FIG. 5a, namely the views on the inlet end and the outlet end of this embodiment of FIG It can be seen that the eccentricity ei at the inlet end of the eccentric screw pump is greater than the eccentricity e n in the outlet region. FIGS. 6a to 6c likewise show a further embodiment of the eccentric screw pump 100 according to the invention, which differs from the eccentric screw pump shown in FIGS. 4a to 4c in that in this embodiment both the cross section and the pitch of the rotor or of the rotor Stators were 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, FIGS. 6b and 6c it can be seen that the cross section of the rotor 1 in the inlet region of the eccentric screw pump is greater than the cross section of the rotor 1 in the outlet region 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. Bezugs zeichenliste 100 Exzenterschneckenpumpe 1 RotorA further variant of the eccentric screw pump according to the invention is shown in FIGS. 7a to 7c, 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 were. In particular, Fig. 7a 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 the cross section of the rotor 1 and the eccentricity e are shown in FIGS. 7b and 7c. Reference signs 100 Progressive cavity pump 1 Rotor
2 Stator2 stators
3 Kammer3 chamber
4 Kammer4 chamber
5 Kammer n Kammer ei Exzentrizität e.2 Exzentrizität e3 Exzentrizität en Exzentrizität5 n chamber chamber ei eccentricity e.2 eccentricity e 3 eccentricity e n eccentricity
Vi VolumenVi volume
V2 VolumenV 2 volume
V3 VolumenV 3 volume
Vn VolumenV n volume
L Längsrichtung h Steigung d Querschnitt L longitudinal direction h slope d cross section

Claims

Patentansprüche : Claims:
1. Exzenterschneckenpumpe (100), insbesondere zur Förderung von dickflüssigen, hochviskosen und abrasiven Medien, mit einer Längsrichtung L, mindestens aufweisend einen konischen, schraubenförmig gewundenen, mindestens eingängigen Rotor (1) mit einer Steigung h, mit mindestens einer Exzentrizität (ei, θ2, e3, ...en) und mindestens einem Querschnitt d, der in einem ein oder mehrgängigen konischen Stator (2), drehbar angeordnet ist,1 eccentric screw pump (100), in particular for conveying viscous, highly viscous and abrasive media, having a longitudinal direction L, at least comprising a conical, helically wound, at least catchy rotor (1) with a slope h, with at least one eccentricity (ei, θ2 , e 3 , ... e n ) and at least one cross section d, which is rotatably arranged in a one or more conical conical stator (2),
- bei der zwischen Rotor (1) und Stator (2) eine Mehrzahl von Kammern (3, 4, 5...n) mit jeweils einem Volumen (V3, V4, V5...Vn) gebildet ist, die zur Beförderung des Mediums dienen,in which a plurality of chambers (3, 4, 5... n) each having a volume (V 3 , V 4 , V 5 ... V n ) are formed between the rotor (1) and the stator (2), which serve for the transport of the medium,
- bei der die Kammern (3, 4, 5...n) zwischen Stator- At the chambers (3, 4, 5 ... n) between the stator
(2) und Rotor (1) durch eine Dichtlinie D begrenzt sind,(2) and rotor (1) are delimited by a sealing line D,
dadurch gekennzeichnet, dasscharacterized in that
die Volumina (V3, V4, V5...Vn) jeder einzelnen Kammer (3, 4, 5...n) zwischen Stator (2) und Rotor (1) gleich groß sind.the volumes (V 3 , V 4 , V 5 ... V n ) of each individual chamber (3, 4, 5 ... n) between stator (2) and rotor (1) are the same size.
2. Exzenterschneckenpumpe, insbesondere zur Förderung von dickflüssigen, hochviskosen und abrasiven Medien, mit einer Längsrichtung L, mindestens aufweisend ei- nen 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,2. eccentric screw pump, in particular for conveying viscous, highly viscous and abrasive media, with a longitudinal direction L, at least comprising a NEN stair-step, helically wound, at least catchy rotor having a pitch h, with at least one eccentricity e and at least one cross-section d, which is rotatably arranged in a one or more common, stepped stator,
— bei der zwischen Rotor und Stator eine Mehrzahl von Kammern mit jeweils einem Volumen gebildet ist, die zur Beförderung des Mediums dienen,In which a plurality of chambers, each with a volume, are formed between the rotor and the stator, which serve to convey the medium,
— bei der die Kammern zwischen Stator und Rotor durch eine Dichtlinie D begrenzt sind,In which the chambers between the stator and the rotor are delimited by a sealing line D,
dadurch gekennzeichnet, dasscharacterized in that
die Volumina jeder einzelnen Kammer zwischen Stator und Rotor gleich groß sind.the volumes of each individual chamber between stator and rotor are the same size.
3. Exzenterschneckenpumpe (100) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Steigung h des Rotors (1) in Längsrichtung L des Rotors (1) abnimmt.3. Eccentric screw pump (100) according to claim 1 or 2, characterized in that the slope h of the rotor (1) in the longitudinal direction L of the rotor (1) decreases.
4. Exzenterschneckenpumpe (100) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Rotor (1) als Verschleißschutz eine Beschichtung z.B. mit Chrom, mit einem keramischen Werkstoff oder mit anderen Materialien aufweist.4. Eccentric screw pump (100) according to claim 1 or 2, characterized in that the rotor (1) as wear protection, a coating e.g. with chromium, with a ceramic material or with other materials.
5. Exzenterschneckenpumpe (100) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Steigung h des Rotors (1) mit abnehmenden Querschnitt d des Rotors (1) abnimmt und dass der Rotors (1) in Längsrichtung L einen abnehmenden Querschnitt d aufweist. 5. Eccentric screw pump (100) according to one of claims 1 to 4, characterized in that the slope h of the rotor (1) with decreasing cross-section d of the rotor (1) decreases and that the rotor (1) in the longitudinal direction L a decreasing cross-section d having.
6. Exzenterschneckenpumpe (100) nach einem Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Exzentrizität6. eccentric screw pump (100) according to one of claims 1 to 4, characterized in that the eccentricity
(ei, θ2, θ3, ...en) des Rotors (1) in Längsrichtung L zu- oder abnimmt und der Querschnitt d des Rotors (1) ab- oder zunimmt.(ei, θ2, θ3, ... e n ) of the rotor (1) in the longitudinal direction L increases or decreases and the cross-section d of the rotor (1) decreases or increases.
7. Exzenterschneckenpumpe (100) nach einem Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Exzentrizität7. eccentric screw pump (100) according to one of claims 1 to 4, characterized in that the eccentricity
(ei, θ2, θ3, ...en) des Rotors (1) in Längsrichtung L zu- oder abnimmt und die Steigung h des Rotors (1) in Längsrichtung L zu- oder abnimmt.(ei, θ2, θ3, ... e n ) of the rotor (1) in the longitudinal direction L increases or decreases and the slope h of the rotor (1) in the longitudinal direction L increases or decreases.
8. Exzenterschneckenpumpe (100) nach einem Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Exzentrizität8. eccentric screw pump (100) according to one of claims 1 to 4, characterized in that the eccentricity
(ei, θ2, θ3, ...en) des Rotors (1) in Längsrichtung L zu- oder abnimmt, die Steigung h des Rotors (1) in Längsrichtung L zu- oder abnimmt und dass der Rotor (1) in Längsrichtung L einen ab- oder zunehmenden Querschnitt d aufweist.(ei, θ2, θ3, ... e n ) of the rotor (1) in the longitudinal direction L increases or decreases, the slope h of the rotor (1) in the longitudinal direction L increases or decreases and that the rotor (1) in the longitudinal direction L has a decreasing or increasing cross section d.
9. Exzenterschneckenpumpe (100) nach einem oder mehreren der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Stator (2) und/oder der Rotor (1) aus einem Elastomer oder einem Feststoff besteht.9. Eccentric screw pump (100) according to one or more of the preceding claims, characterized in that the stator (2) and / or the rotor (1) consists of an elastomer or a solid.
10. Exzenterschneckenpumpe (100) nach einem oder mehreren der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Stator (2) einen aus einem anderen Material bestehenden ring- oder röhrenförmigen Statormantel aufweist.10. Eccentric screw pump (100) according to one or more of the preceding claims, characterized in that the stator (2) has a ring made of a different material or tubular stator shell.
11. Exzenterschneckenpumpe (100) Anspruch 10, dadurch gekennzeichnet, dass der Statormantel eine konische Form aufweist. 11. Eccentric screw pump (100) according to claim 10, characterized in that the stator jacket has a conical shape.
12. Exzenterschneckenpumpe (100) nach einem oder mehreren der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Stator (2) eine gleichmäßige KunststoffWandstärke aufweist. 12. 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)

Application Number Priority Date Filing Date Title
PL10711641T PL2404061T3 (en) 2009-03-02 2010-03-02 Eccentric screw pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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

Publications (2)

Publication Number Publication Date
EP2404061A2 true EP2404061A2 (en) 2012-01-11
EP2404061B1 EP2404061B1 (en) 2020-11-11

Family

ID=40911653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10711641.0A Revoked EP2404061B1 (en) 2009-03-02 2010-03-02 Eccentric screw pump

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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)
RU (1) RU2535795C2 (en)
WO (1) WO2010100134A2 (en)

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Also Published As

Publication number Publication date
WO2010100134A3 (en) 2010-12-29
RU2535795C2 (en) 2014-12-20
ES2846680T3 (en) 2021-07-28
US9109595B2 (en) 2015-08-18
CA2754139C (en) 2018-07-24
PL2404061T3 (en) 2021-06-28
EP2404061B1 (en) 2020-11-11
WO2010100134A2 (en) 2010-09-10
DK2404061T3 (en) 2021-02-08
DE202009002823U1 (en) 2009-07-30
RU2011139951A (en) 2013-04-10
US20110305589A1 (en) 2011-12-15
CA2754139A1 (en) 2010-09-10
PT2404061T (en) 2021-01-29

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