EP2532833B1 - Elément de transport pour une pompe à vis sans fin excentrique et pompe à vis sans fin excentrique - Google Patents

Elément de transport pour une pompe à vis sans fin excentrique et pompe à vis sans fin excentrique Download PDF

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Publication number
EP2532833B1
EP2532833B1 EP11169407.1A EP11169407A EP2532833B1 EP 2532833 B1 EP2532833 B1 EP 2532833B1 EP 11169407 A EP11169407 A EP 11169407A EP 2532833 B1 EP2532833 B1 EP 2532833B1
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Prior art keywords
screw thread
thread
stator
delivery volume
rotor
Prior art date
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EP11169407.1A
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German (de)
English (en)
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EP2532833A1 (fr
Inventor
Vinzenz Gantenhammer
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Viscotec Pumpen und Dosiertechnik GmbH
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Viscotec Pumpen und Dosiertechnik GmbH
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Priority to EP11169407.1A priority Critical patent/EP2532833B1/fr
Publication of EP2532833A1 publication Critical patent/EP2532833A1/fr
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/107Rotary-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
    • F04C2/1071Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084Toothed wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00Geometry
    • F04C2250/20Geometry of the rotor

Definitions

  • the invention relates to a conveying element for an eccentric screw pump.
  • the conveying element is for example a stator or a rotor of the eccentric screw pump.
  • the invention relates to an eccentric screw pump and a method for producing a conveyor element for an eccentric screw pump.
  • the technical field of the invention relates to the metering of viscous media, such as fluids or liquids, such as adhesives or sealants, paints, varnishes, solvents, suspensions, viscous raw materials, emulsions, pastes, food pastes, oils or fats.
  • viscous media such as fluids or liquids, such as adhesives or sealants, paints, varnishes, solvents, suspensions, viscous raw materials, emulsions, pastes, food pastes, oils or fats.
  • a high pressure level for the feed of the eccentric screw pump is usually necessary. This is achieved for example by pre-pressure pumps, pressure vessel systems, pressure accumulator or pressure and volume storage.
  • the DE 20 2009 002 823 U1 shows an eccentric screw pump for conveying viscous, highly viscous and abrasive media.
  • the eccentric screw pump In its longitudinal direction, the eccentric screw pump has at least one conical, helically wound, at least catchy red with a slope, with at least one eccentricity and at least one Cross-section which is rotatably arranged in a single or multi-start conical stator.
  • the EP2063125A1 which is considered to be the closest prior art, discloses an eccentric screw pump having the features of the preamble of claim 1.
  • the stated object is achieved by a conveyor element for an eccentric screw pump with the features of claim 1, by a progressive cavity pump having the features of claim 14 and by a method for producing a conveyor element for an eccentric screw pump having the features of claim 15.
  • a conveyor element for an eccentric screw pump for conveying a fluid which has a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume, wherein the first delivery volume is greater than the second delivery volume.
  • an eccentric screw pump for conveying a fluid which has a stator with N + 1 threads and an arranged in the stator rotor with N threads.
  • the stator has a first female screw thread for providing a first delivery volume and a second female screw thread for providing a second delivery volume.
  • the rotor has a first male screw thread for providing the first delivery volume and a second male screw thread for providing the second delivery volume. The first delivery volume is greater than the second delivery volume.
  • first inner screw thread and the second inner screw thread are formed as a one-piece part, and the first outer screw thread and the second outer screw thread are also formed as an integral part.
  • first inner screw thread and the second inner screw thread are made of different materials, and that first outer screw thread and the second outer screw thread are also made of different materials.
  • the rotor and the stator can be brought into an operative connection for conveying the fluid out of a container.
  • the eccentric screw pump is based in particular on the Moineau principle.
  • a method for producing a conveyor element for an eccentric screw pump for conveying a fluid in which a first screw thread for providing a first delivery volume and a second screw thread for providing a second delivery volume are prepared such that the first delivery volume is greater than the second delivery volume is.
  • a container removal system with a container for receiving the fluid to be delivered and an eccentric screw pump as described above for removing the fluid to be delivered is proposed.
  • the container removal system can be used, for example, for barrel removal or as a degassing system with vacuum technology.
  • the first screw thread can act as a booster for the second screw thread.
  • the conveying element in particular the second screw thread of the conveying element, supplied with sufficient material and form, so that cavitation states can occur in any portion of the dosing process.
  • a very stable dosing process is provided according to the invention.
  • the accuracy of the dosage is increased since parameter deviations at start and stop of the dosing process are reduced or avoided.
  • feed systems can be simplified and the pressure level can be reduced by the conveyor element according to the invention.
  • the regulatory burden can be minimized or completely eliminated.
  • the conveying element according to the invention ensures high efficiency, in particular high metering stability, even under poor feed conditions.
  • the first delivery volume is 1.3 to 4 times greater than the second delivery volume.
  • the first delivery volume is 1.5 times to 3 times greater than the second delivery volume.
  • the conveying element as a catchy or Herzoger rotor of
  • the conveying element is designed as a stator of the eccentric screw pump, wherein the first screw thread and the second screw thread are each formed as a multi-course internal screw thread.
  • eccentricities of the first and second screw threads are the same and the diameters of the first and second screw threads are different.
  • the ratio between the diameter of the first screw thread and the diameter of the second screw thread is in a range between 1.3 and 4, preferably between 1.5 and 3.
  • eccentricities of the first and second screw threads are the same and the pitches of the first and second screw threads are different.
  • the ratio between the pitch of the first screw thread and the pitch of the second screw thread is in a range of 1.3 to 4, preferably 1.5 to 3.
  • the eccentricities of the first and second screw threads are the same, the diameters of the first and second screw threads differ, and the pitches of the first and second screw threads are different.
  • d1 is the diameter of the first screw thread
  • d2 is the diameter of the second screw thread
  • s1 is the pitch of the first screw thread
  • s2 is the pitch of the second screw thread
  • being in a range of 1.3 to 4, preferably 1.5 to 3, lies.
  • the first screw thread is Teflon and the second screw thread is an elastomer.
  • the fluid or viscous medium has a viscosity of 0.1 to 10 7 mPas, preferably from 10 1 to 10 6 mPas, particularly preferably from 10 3 to 10 4 mPas.
  • Fig. 1 a view of an embodiment of a catchy rotor 1 according to the invention is shown.
  • the catchy rotor 1 is adapted to be in operative connection with a double-flighted stator Progressing cavity pump To dose and convey fluid (see Fig. 3 ).
  • the rotor 1 In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2.
  • the first delivery volume v1 is greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2.
  • the first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.
  • the first screw thread 2 and the second screw thread 3 are formed as an integral part. However, it is also possible to produce the first screw thread 2 and the second screw thread 3 as two separate parts and to add in a subsequent joining process.
  • the eccentricities e1, e2 of the first and second screw threads 2, 3 are the same.
  • the diameters d1, d2 of the first and second screw threads 2, 3 are different.
  • Fig. 2 shows a sectional view of an embodiment of a double-flighted stator according to the invention 4.
  • the double-flighted stator 4 may be connected to the rotor 1 of Fig. 1 be brought into an operative connection (see Fig. 3 ).
  • the double-flighted stator 4 of the Fig. 2 has in a first area B1 a first screw thread 5 for providing the first delivery volume v1.
  • the stator 4 has a second screw thread 6 for providing the second Delivery volume v2.
  • the first screw thread 5 and the second screw thread 6 are each formed as a double-threaded thread.
  • FIG. 3 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a catchy rotor 1 after Fig. 1 and a double-flighted stator 4 Fig. 2 , The double-flighted stator 4 is shown cut.
  • the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged.
  • the second outer screw thread 3 of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.
  • Fig. 4 is a view of an embodiment of a double-flighted rotor 1 according to the invention shown.
  • the double-flighted rotor 1 is suitable for metering and delivering fluid in operative connection with a three-speed stator of an eccentric screw pump (see Fig. 6 ).
  • the rotor 1 In a first region B1, the rotor 1 has a first screw thread 2 for providing a first delivery volume v1. In a second region B2 adjoining the first region B1, the rotor 1 has a second screw thread 3 for providing a second delivery volume v2.
  • the first delivery volume v1 is greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.3 to 4 times greater than the second delivery volume v2.
  • the first delivery volume v1 is 1.5 times to 3 times greater than the second delivery volume v2.
  • the first screw thread 2 and the second screw thread 3 are each formed as an external screw thread.
  • the first screw thread 2 and the second screw thread 3 are in particular formed as a one-piece part. However, it is also possible to manufacture the first screw thread 2 and the second screw thread 3 as two separate parts and to add them in a subsequent joining process.
  • the eccentricities e1, e2 of the first and second screw threads 2, 3 are the same.
  • the diameters d1, d2 of the first and second screw threads 2, 3 are different.
  • the slopes s1, s2 of the first and second screw threads 2, 3 are different.
  • Fig. 5 shows a sectional view of an embodiment of a three-speed stator according to the invention 4.
  • the three-speed stator 4 may be connected to the rotor 1 of Fig. 4 be brought into an operative connection (see Fig. 6 ).
  • the three-speed stator 4 of FIG. 5 has in the first area B1 a first screw thread 5 for providing the first delivery volume v1.
  • the stator 4 has a second screw thread 6 for providing the second delivery volume v2.
  • the first screw thread 5 and the second screw thread 6 are each formed as a three-start internal screw thread.
  • FIG. 6 a view of a section of an embodiment of an eccentric screw pump 7 according to the invention with a two-speed rotor 1 after Fig. 4 and a three-speed stator 4 after Fig. 5 ,
  • the first outer screw thread 2 of the rotor 1 and the first inner screw thread 5 of the stator 4 are arranged.
  • the second outer screw thread of the rotor 1 and the second inner screw thread 6 of the stator 4 are arranged in the second region B2.
  • Fig. 7 is a schematic flow diagram of an embodiment of a method for producing a conveyor element for an eccentric screw pump shown.
  • a first screw thread for providing a first delivery volume is produced in a first region of the delivery element.
  • a second screw thread for providing a second delivery volume is produced in a second region of the delivery element, wherein the first delivery volume is greater than the second delivery volume.

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

Claims (9)

  1. Pompe à vis sans fin excentrique (7) pour le refoulement d'un fluide, comportant :
    - un stator (4) comportant N+1 pas de vis, qui présente un premier filetage de vis intérieur (5) pour la fourniture d'un premier volume de refoulement (v1) et un second filetage de vis intérieur (6) relié dans le sens longitudinal au premier filetage de vis intérieur (5) pour la fourniture d'un second volume de refoulement (v2),
    - un rotor (1) disposé dans le stator (4) comportant N pas de vis, qui présente un premier filetage de vis extérieur (2) pour la fourniture du premier volume de refoulement (v1) et un second filetage de vis extérieur (3) relié dans le sens longitudinal au premier filetage de vis extérieur (2) pour la fourniture du second volume de refoulement (v2),
    dans lequel le premier filetage de vis intérieur (5) et le second filetage de vis intérieur (6) sont réalisés d'un seul tenant,
    dans lequel le premier filetage de vis extérieur (2) et le second filetage de vis extérieur (3) sont réalisés d'un seul tenant,
    caractérisée par le fait que le premier volume de refoulement (v1) est supérieur au second volume de refoulement (v2), que le premier filetage de vis intérieur (5) et le second filetage de vis intérieur (6) sont constitués de différents matériaux, et que le premier filetage de vis extérieur (2) et le second filetage de vis extérieur (3) sont constitués de différents matériaux.
  2. Pompe à vis sans fin excentrique selon la revendication 1, caractérisée par le fait que le premier volume de refoulement (v1) est 1,3 fois à 4 fois, préférentiellement 1,5 fois à 3 fois, supérieur au second volume de refoulement (v2).
  3. Pompe à vis sans fin excentrique selon l'une des revendications 1 ou 2, caractérisée par le fait que les excentricités du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont identiques et les diamètres du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont différents.
  4. Pompe à vis sans fin excentrique selon la revendication 3, caractérisée par le fait que le rapport entre le diamètre du premier filetage de vis extérieur et intérieur (2, 5) et le diamètre du second filetage de vis extérieur et intérieur (3, 6) est situé dans une plage comprise entre 1,3 et 4, préférentiellement entre 1,5 et 3.
  5. Pompe à vis sans fin excentrique selon l'une des revendications 1 ou 2, caractérisée par le fait que les excentricités du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont identiques et les pas du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont différents.
  6. Pompe à vis sans fin excentrique selon la revendication 5, caractérisée par le fait que le rapport entre le pas du premier filetage de vis extérieur et intérieur (2, 5) et le pas du second filetage de vis extérieur et intérieur (3, 6) est situé dans une plage comprise entre 1,3 et 4, préférentiellement entre 1,5 et 3.
  7. Pompe à vis sans fin excentrique selon l'une des revendications 1 à 6,
    caractérisée par le fait que les excentricités du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont identiques, les diamètres du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont différents, et les pas du premier et du second filetage de vis extérieur et intérieur (2, 5 ; 3, 6) sont différents.
  8. Pompe à vis sans fin excentrique selon l'une des revendications 1 à 7,
    caractérisée par le fait que
    d 1 s 1 d 2 s 2 > α ,
    Figure imgb0004
    ou
    d1 désigne le diamètre du premier filetage de vis extérieur (2), d2 désigne le diamètre du second filetage de vis (3, 6), s1 désigne le pas du premier filetage de vis (2, 5), et s2 désigne le pas du second filetage de vis (3, 6), a étant situé dans une plage comprise entre 1,3 et 4, préférentiellement entre 1,5 et 3.
  9. Pompe à vis sans fin excentrique selon la revendication 1, caractérisée par le fait que le premier filetage de vis intérieur (5) est constitué de Téflon et le second filetage de vis intérieur (6) est constitué d'élastomère.
EP11169407.1A 2011-06-10 2011-06-10 Elément de transport pour une pompe à vis sans fin excentrique et pompe à vis sans fin excentrique Active EP2532833B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11169407.1A EP2532833B1 (fr) 2011-06-10 2011-06-10 Elément de transport pour une pompe à vis sans fin excentrique et pompe à vis sans fin excentrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11169407.1A EP2532833B1 (fr) 2011-06-10 2011-06-10 Elément de transport pour une pompe à vis sans fin excentrique et pompe à vis sans fin excentrique

Publications (2)

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EP2532833A1 EP2532833A1 (fr) 2012-12-12
EP2532833B1 true EP2532833B1 (fr) 2015-07-29

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100451B4 (de) 2013-01-17 2016-04-07 Netzsch Pumpen & Systeme Gmbh Rotor für Schnecken- und / oder Exzenterschneckenpumpen und Schnecken- oder Exzenterschneckenpumpe
CN105697373B (zh) * 2014-11-25 2017-08-25 巫修海 一种螺杆真空泵的螺杆
DE102016009028A1 (de) 2016-07-26 2018-02-01 Netzsch Pumpen & Systeme Gmbh Rotor-Stator-System mit einem Einlauftrichter für eine Exzenterschneckenpumpe
USD971967S1 (en) * 2020-02-13 2022-12-06 Viscotec Pumpen—Und Dosiertechnik Gmbh Metering pump
FR3136019B1 (fr) * 2022-05-25 2024-05-10 Pcm Tech Pompe à cavités progressives et dispositif de pompage

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE202009002823U1 (de) * 2009-03-02 2009-07-30 Daunheimer, Ralf Exzenterschneckenpumpe

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US4636151A (en) * 1985-03-13 1987-01-13 Hughes Tool Company Downhole progressive cavity type drilling motor with flexible connecting rod
US5108273A (en) * 1990-08-30 1992-04-28 Robbins & Myers, Inc. Helical metering pump having different sized rotors
US6093004A (en) * 1998-02-12 2000-07-25 Zenergy Llc Pump/motor apparatus using 2-lobe stator
DE10118785A1 (de) * 2001-04-17 2002-10-24 Viscotec Pumpen Und Dosiertech Exzenterschneckenpumpe
RU2214513C1 (ru) * 2002-04-24 2003-10-20 Давыдов Владимир Всеволодович Героторная машина
RU55050U1 (ru) * 2005-08-12 2006-07-27 Дмитрий Федорович Балденко Устройство для перекачивания газожидкостных смесей при технологических операциях в скважинах
DE502007001761D1 (de) * 2007-11-02 2009-11-26 Grundfos Management As Moineau-Pumpe

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Publication number Priority date Publication date Assignee Title
DE202009002823U1 (de) * 2009-03-02 2009-07-30 Daunheimer, Ralf Exzenterschneckenpumpe

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