EP0713974A1 - Pompe moineau - Google Patents

Pompe moineau Download PDF

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Publication number
EP0713974A1
EP0713974A1 EP95118444A EP95118444A EP0713974A1 EP 0713974 A1 EP0713974 A1 EP 0713974A1 EP 95118444 A EP95118444 A EP 95118444A EP 95118444 A EP95118444 A EP 95118444A EP 0713974 A1 EP0713974 A1 EP 0713974A1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
reference plane
axis
screw end
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
EP95118444A
Other languages
German (de)
English (en)
Other versions
EP0713974B1 (fr
Inventor
Johann Kreidl
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP0713974A1 publication Critical patent/EP0713974A1/fr
Application granted granted Critical
Publication of EP0713974B1 publication Critical patent/EP0713974B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids

Definitions

  • the invention relates to an eccentric screw pump according to the preamble of claim 1.
  • the screw conveyor is firmly connected to the coupling rod so that it participates in its tumbling movements.
  • the screw conveyor is fastened to a tube which is mounted coaxially with the drive shaft and through which the coupling rod extends.
  • a generic eccentric screw pump is known (DE-U 71 03 501), in which the screw conveyor is attached to the end of the rotor remote from the coupling rod. In all of these cases, the screw conveyor is arranged below a feed hopper through which the medium to be conveyed is fed.
  • a generic eccentric screw pump for separating solids and liquids is also known (DE-A 16 36 02), in which the screw conveyor and the storage space accommodating it are arranged on the pressure side of the rotor and stator.
  • the screw conveyor has the task of further transporting the dry materials conveyed by the rotor.
  • the invention is therefore based on the object of increasing the throughput of an eccentric screw pump of the type described for given dimensions of the rotor and the screw conveyor.
  • the invention is particularly important in such generic progressing cavity pumps in which the screw conveyor is arranged upstream of the rotor, that is to say on the suction side.
  • the arrangement of the rotor-side screw end according to the invention ensures that the material to be conveyed from Screw end is pushed directly into the stator chamber, so that it is largely filled.
  • the actual eccentric screw pump, consisting of the stator and rotor works with a particularly high degree of filling.
  • the invention is also advantageous in eccentric screw pumps in which a screw is arranged downstream of the rotor, that is to say on the pressure side.
  • the end of the screw on the rotor side takes over the material to be conveyed without any significant delay when it exits the stator chamber. This relieves the stator chamber of dynamic pressure, which also contributes to increasing the performance of the actual eccentric screw pump consisting of the stator and rotor.
  • the invention has proven itself primarily in eccentric screw pumps with a two-speed stator and a correspondingly single-speed rotor;
  • the measures according to the invention can also advantageously be used in progressing cavity pumps with three- or more-speed stator chambers and, accordingly, two-or more-speed rotors, as are known from the basic patents of René Joseph Louis Moineau (e.g. DE 633 784).
  • the eccentric screw pump shown in FIGS. 1 and 2 has a stator 10 of conventional design with a stator chamber 12 which is coiled around a stator axis 14 and adjoins a funnel 16 which facilitates the inflow of pumped medium into the starter chamber 12.
  • the funnel 16 ends and the stator chamber 12 begins in a reference plane 18 normal to the stator axis 14.
  • a rotor 20 is arranged in the stator chamber 12 and has a circular cross section at any point; the center points of all cross sections form a center line 22, which is wound around a rotor axis 24 parallel to the stator axis 14.
  • the rotor 20 is connected by a joint 26 to a coupling rod 28, which is connected in the usual and therefore not shown manner via a further, generally identical joint to a stationary drive shaft.
  • the joints 26 can be omitted if the coupling rod 28 is sufficiently long and elastic.
  • rotation of the drive shaft is transmitted to the rotor 20 via the coupling rod 28 in such a way that it rotates about its own rotor axis 24 and rotates it around the stator axis 14 as the generator of an imaginary cylindrical surface area; the cylindrical surface is indicated in Fig. 2 as a dash-dotted circle.
  • the stator 10 is fastened to a housing 30 which is arranged upstream of it and which encloses a storage space 32.
  • the coupling rod 28 and the joint 26 are arranged, which in the example shown has a joint pin 34 with a pin axis 36 parallel to the reference plane 18.
  • the coupling rod 28 extends through a tube 38 which is rigidly connected either to the drive shaft mentioned or to the coupling rod 28.
  • a screw conveyor 40 is coiled around the articulation 26, which is attached to the pipe 38 according to FIG. 1, for example welded on, and radially outside the articulation 26 has a screw end 42 in the form of a radial edge parallel to the reference plane 18.
  • the stator chamber 12 appears in the reference plane 18 as an oval with the main axis vertical according to FIG. 2; when viewing the stator 10 in the axial direction from the storage space 32, the aforementioned funnel 16 can be seen in addition to this oval.
  • the circular cross section of the rotor 20 in the reference plane 18 first moves downward and then up again in the course of a full rotor revolution.
  • the first position shown in FIG. 2 at the angle of rotation 0 ° is an upper edge position in which the rotor 20 conforms to the upper, semicircular rounding of the oval, so that an undivided conveying cross-sectional area 44 remains free below the rotor cross section shown.
  • the screw end 42 In this rotor position, the screw end 42 extends vertically downward, so that its projection into the reference plane 18 appears in the middle of the free conveying cross-sectional area 44.
  • This preferred arrangement is drawn with thick lines in FIG. 2; it is offset from the zero position of the rotor 20 by an angle a, which is preferably 180 °.
  • the arrangement of the screw end 42 as indicated by dashed and dash-dotted lines, can deviate from the preferred arrangement by an angle b, which should preferably not be greater than 45 °.
  • the screw conveyor 40 ie also the screw end 42, rotates with the rotor 20 at an approximately constant angular velocity.
  • Fig. 2 eight rotational angle positions of the rotor 20 and screw end 42 are shown offset by 45 °. From these representations it can be seen that material displaced from the screw conveyor 40 and flowing out via the screw end 42 is largely immediate and only to a smaller extent Part of the funnel 16 reaches the stator chamber 12, so that there is hardly any possibility of jamming in the funnel 16. As a result, the eccentric screw pump operates with a particularly high degree of filling of the stator chamber 12.
  • FIG. 3 differs from that shown in FIG. 1 primarily in that the screw conveyor 40 is attached directly to the housing of the joint 26 and is made much shorter.
  • the joint 26 is shown in FIG. 3 as an arch tooth joint. Regardless of these differences, the functional representation in FIG. 2 also applies to the exemplary embodiment according to FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP95118444A 1994-11-25 1995-11-23 Pompe moineau Expired - Lifetime EP0713974B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442060 1994-11-25
DE4442060A DE4442060C1 (de) 1994-11-25 1994-11-25 Exzenterschneckenpumpe, insbesondere zum Fördern von Medien mit hoher Viskosität oder hohem Feststoffgehalt

Publications (2)

Publication Number Publication Date
EP0713974A1 true EP0713974A1 (fr) 1996-05-29
EP0713974B1 EP0713974B1 (fr) 1997-10-22

Family

ID=6534184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118444A Expired - Lifetime EP0713974B1 (fr) 1994-11-25 1995-11-23 Pompe moineau

Country Status (2)

Country Link
EP (1) EP0713974B1 (fr)
DE (2) DE4442060C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1691076A1 (fr) 2005-01-27 2006-08-16 Nordson Corporation Dispositif applicateur comprenant une pompe volumétrique
US7165933B2 (en) 2001-12-04 2007-01-23 Kag Holding A/S Screw pump for transporting emulsions susceptible to mechanical handling

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1522729B2 (fr) * 2003-10-07 2013-03-27 Johann Heinrich Bornemann GmbH - Kunststofftechnik Obernkirchen - Pompe à cavité progressive et stator pour une telle pompe
DE102006036243A1 (de) * 2006-08-03 2008-02-14 Netzsch-Mohnopumpen Gmbh Förderschnecke für Exzenterschneckenpumpe
DE102007058412A1 (de) * 2007-12-03 2009-06-04 Bartec Dispensing Technology Gmbh Vorrichtung zur Aufbereitung viskosen Materials sowie Aufbereitungseinrichtung umfassend eine solche Vorrichtung
DE102012001617A1 (de) 2012-01-30 2013-08-01 Netzsch Pumpen & Systeme Gmbh Vorrichtung zum Fördern von Medien
DE102016009028A1 (de) * 2016-07-26 2018-02-01 Netzsch Pumpen & Systeme Gmbh Rotor-Stator-System mit einem Einlauftrichter für eine Exzenterschneckenpumpe

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE633784C (de) 1935-03-21 1936-08-06 Rene Joseph Louis Moineau Als Pumpe, Motor oder UEbertragungsorgan o. dgl. verwendbare Vorrichtung
DE1277819B (de) 1965-05-12 1968-09-19 Karl Schlecht Dipl Ing Vorrichtung zum kontinuierlichen Mischen von pulverfoermigem bis feinkoernigem Schuettgut
DE6916941U (de) 1969-04-26 1969-08-21 G A Kiesel Ges Mit Beschraenkt Exzenterschneckenpumpe
DE1678472B1 (de) 1963-05-02 1970-06-04 Netzsch Maschinenfabrik Speisevorrichtung fuer Exzenterschraubenpumpen
DE1557211A1 (de) 1967-02-22 1970-07-02 Schlecht Dipl Ing Karl Ruehrwelle fuer Mischpumpen
DE1636302A1 (de) 1965-03-17 1970-10-08 Eugen Soeding Exzenterschneckenpumpe
DE1553201A1 (de) 1966-04-27 1971-02-18 Schlecht Karl Exzenter-Schneckenpumpe mit zentrischer Ruehrschnecke
DE7103501U (de) 1971-01-30 1971-04-29 Gebrueder Netzsch Maschinenfabrik Speisevorrichtung fuer eine exzenterschraubenpumpe
DE1963681A1 (de) 1969-12-19 1971-06-24 Streicher Foerdertech Dickstoffpumpe mit angebautem Drehschieber

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121717C2 (de) * 1991-06-07 1995-01-26 Allweiler Ag Schneckenpumpe, insbesondere Exzenterschneckenpumpe

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE633784C (de) 1935-03-21 1936-08-06 Rene Joseph Louis Moineau Als Pumpe, Motor oder UEbertragungsorgan o. dgl. verwendbare Vorrichtung
DE1678472B1 (de) 1963-05-02 1970-06-04 Netzsch Maschinenfabrik Speisevorrichtung fuer Exzenterschraubenpumpen
DE1636302A1 (de) 1965-03-17 1970-10-08 Eugen Soeding Exzenterschneckenpumpe
DE1277819B (de) 1965-05-12 1968-09-19 Karl Schlecht Dipl Ing Vorrichtung zum kontinuierlichen Mischen von pulverfoermigem bis feinkoernigem Schuettgut
DE1553201A1 (de) 1966-04-27 1971-02-18 Schlecht Karl Exzenter-Schneckenpumpe mit zentrischer Ruehrschnecke
DE1557211A1 (de) 1967-02-22 1970-07-02 Schlecht Dipl Ing Karl Ruehrwelle fuer Mischpumpen
DE6916941U (de) 1969-04-26 1969-08-21 G A Kiesel Ges Mit Beschraenkt Exzenterschneckenpumpe
DE1963681A1 (de) 1969-12-19 1971-06-24 Streicher Foerdertech Dickstoffpumpe mit angebautem Drehschieber
DE7103501U (de) 1971-01-30 1971-04-29 Gebrueder Netzsch Maschinenfabrik Speisevorrichtung fuer eine exzenterschraubenpumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7165933B2 (en) 2001-12-04 2007-01-23 Kag Holding A/S Screw pump for transporting emulsions susceptible to mechanical handling
EP1691076A1 (fr) 2005-01-27 2006-08-16 Nordson Corporation Dispositif applicateur comprenant une pompe volumétrique

Also Published As

Publication number Publication date
EP0713974B1 (fr) 1997-10-22
DE4442060C1 (de) 1996-03-14
DE59500853D1 (de) 1997-11-27

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