WO2018162360A1 - Pompe à vis sans fin excentrée - Google Patents

Pompe à vis sans fin excentrée Download PDF

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Publication number
WO2018162360A1
WO2018162360A1 PCT/EP2018/055216 EP2018055216W WO2018162360A1 WO 2018162360 A1 WO2018162360 A1 WO 2018162360A1 EP 2018055216 W EP2018055216 W EP 2018055216W WO 2018162360 A1 WO2018162360 A1 WO 2018162360A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
geometry
eccentric screw
screw pump
pump according
Prior art date
Application number
PCT/EP2018/055216
Other languages
German (de)
English (en)
Inventor
Norman Dicks
Oliver Stumpf
Original Assignee
Seepex 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 Seepex Gmbh filed Critical Seepex Gmbh
Publication of WO2018162360A1 publication Critical patent/WO2018162360A1/fr

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
    • F04C2/1073—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 where one member is stationary while the other member rotates and orbits
    • 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
    • F04C2/1073—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 where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member

Definitions

  • the invention relates to an eccentric screw with
  • stator of elastic or elastomeric material defining a helical interior, a stator jacket surrounding the stator,
  • Such an eccentric screw pump is a pump from the group of rotary displacement pumps, which are used to convey a wide variety of media and in particular liquid media and also highly viscous liquids in various industrial sectors. The liquids to be delivered may also contain solids.
  • the rotor is helically formed, with a relatively large pitch and flight depth and relatively small core diameter. It is arranged eccentrically in the stator or in the interior of the stator.
  • the stator or its helical interior has a thread more than the rotor.
  • the rotor abuts the inner surface of the stator via one or more uninterrupted sealing lines.
  • the sealing lines separate conveying spaces from one another, which in the course of the rotation of the rotor from the suction side to the pressure side or from the inlet side to
  • the stator is made of an elastic material.
  • Elastic material means in the context of the invention, in particular an elastomer, for. B. a (synthetic) rubber or a rubber mixture.
  • the stator jacket is formed as a longitudinally divided shell of a plurality of radially clamped shell segments, between which over the shell length extending separating gaps are formed. In such separation column z. B.
  • Statorstege which is externally connected to the rotor, z. B. are formed, which takes place via these engaging in the separating gaps Statorstege a rotationally fixed fixation of the stator in the stator jacket.
  • the stator may be formed as a longitudinally divided stator and a plurality of stator segments, for. B. half shells, exist.
  • Such an eccentric screw pump with longitudinally divided stator and a longitudinally split stator shell of several shell segments is z. B. from DE 10 2008 021 920 A1.
  • the stator jacket with its segments forms a stator clamping device, with which the stator can be tensioned in the radial direction against the rotor. In this way, the desired Vorspannurl can be adjusted.
  • Eccentric screw pumps having such a structure have proven excellent in practice, and in particular against the background of the fact that the stator may be formed longitudinally divided, so that a particularly simple replacement of the stator without complete disassembly of the
  • the invention has for its object to provide an eccentric screw pump of the type described above, which can be used in an economical manner even at high operating pressures and can be designed for high operating pressures.
  • the invention teaches in a generic eccentric screw pump of the type described above, that the stator in the unpressurized and preferably untensioned state has a deviating from the desired geometry oversize geometry with one or more Studentslustrume, as Materialvoren on the setpoint geometry out in the direction towards the rotor and thus are formed toward the interior and each extending over a limited length range.
  • Such excess ranges are preferably dimensioned such that in the (strained)
  • Operating state at a predetermined operating pressure adjusts the desired geometry or at least approximates the actual geometry to the desired geometry.
  • the invention is initially based on the knowledge that the operation of a progressing cavity pump can be optimized when the stator is not manufactured with the ideal setpoint geometry, but with a deviating from the desired geometry oversize geometry, so that then sets the desired geometry only during operation ,
  • the desired geometry refers to the geometry that is ideal for an operating state.
  • the desired geometry is given by the rotor shape (rotor outer geometry) and complementary to this. Does the rotor z. Example, a circular cross section, the stator interior has a desired geometry with a cross section in the form of a slot.
  • the cross section i.e., the cross sectional area and the cross sectional shape
  • the invention is particularly preferably used in an eccentric screw pump with a stator jacket which can be clamped (with a tensioning device) against the stator.
  • a tensioning device By changing the tension of the stator, an external pressure can be exerted on the stator.
  • the stator is deformed.
  • this introduction of force does not take place uniformly over the length and / or circumference of the stator. This is inventively counteracted that the stator is made in the manner described with the oversize geometry, so that a possibly uneven force application is counteracted by appropriately provided oversize.
  • the stator casing can be a longitudinally divided casing made up of a plurality of casing segments that can be braced in the radial direction, between which separating gaps extending over the casing length are formed. It can be z. B. to act two, three or four or more shell segments, which are distributed over the circumference.
  • Statorstege which is externally connected to the stator
  • z. B. are formed as elastomeric webs.
  • stator or the stator geometry can be dimensioned taking into account an intended operating pressure such that in the clamped state and during operation at a predetermined operating pressure (essentially) sets the desired geometry, in which preferably the interior of the stator has a constant cross-section over the entire Length.
  • the actual geometry in the operating state can be approximated to the desired geometry by such oversize regions as material pretensions.
  • the optimal empty geometry ie the actual geometry in the unstressed, pressureless state
  • the invention initially relates to embodiments in which the rotor has a constant over the length of the cross section (area and shape), z. B. a constant over the length of a circular cross-section. Then the
  • the invention also includes embodiments in which the rotor has a continuously increasing or decreasing cross-section over the length and therefore has a conical geometry.
  • the invention is preferably realized in an eccentric screw pump, the stator casing of which consists of a longitudinally divided casing of several casing segments.
  • pumps may be used whose stator jacket is formed by several hold-downs as segments.
  • the invention also includes embodiments in which the stator jacket is optionally formed in one piece, for. B. as a slotted tube having only a separation gap.
  • the stator in the manner already described as a longitudinally divided stator of a plurality of stator segments, for. B. consists of several elastomeric shells.
  • dividing planes result between the stator segments, which for example can run parallel to the length of the stator.
  • the behavior of these parting planes can be taken into account as an influencing factor from the relationship between empty geometry and operating geometry in the determination of the ideal target geometry in the operating state.
  • the invention also includes embodiments with a one-piece stator, since such a one-piece stator can also be combined with a described longitudinally split stator jacket or also with a slotted stator jacket.
  • the stator is preferably formed separately from the stator jacket and consequently arranged detachably or non-destructively interchangeable within the stator jacket.
  • the stator is vulcanized into the stator jacket.
  • the invention is particularly preferably used in pumps in which the stator jacket (in the radial direction) can be clamped against the stator.
  • a voltage of the stator is realized in another way, for. B. via intermediate elements (eg., Hydraulic cushion) or otherwise.
  • Such possibilities of tension are z. B. from DE 10 2014 1 12 552 A1.
  • oversize regions according to the invention extend as material projections only over limited length regions of the stator, so that only local elastomer precautions are provided.
  • the cross-sectional area of the stator interior is less than the cross-sectional area in other areas without such Materialvoren and in particular less than the nominal cross-section during operation.
  • the material projections in the region of the suction side are dimensioned smaller than in the region of the pressure side, because on the suction side lower corrections are required during operation.
  • a stator which has a non-constant thickness over the circumference, d. H. the stator has a non-constant and therefore varying wall thickness along its length. Looking at such a stator, a longitudinal section in a certain peripheral region, the stator has in this longitudinal section over the length of a non-constant and consequently (periodically) varying thickness.
  • stators are to be distinguished from stators with over the circumference and the length of constant wall thickness, which are also used in practice (eg as Equal Wall Stator). In such a stator, the thickness is also constant over the length viewed in a single longitudinal section.
  • the material projections according to the invention are particularly preferably used in a stator with wall thickness that is not constant over the circumference, and particularly preferably in such (circumferential) areas of the stator with a small wall thickness.
  • the invention has recognized that the problem of avoidance of the material described above in areas with large wall thickness is less critical than in areas with low wall thickness, so that particularly preferred material Voranno are provided in areas of low wall thickness.
  • the dimensioning of the material pretensions can consequently be effected as a function of the wall thickness provided at the respective location, in particular the respective circumferential position.
  • the invention can basically be implemented with different stator and rotor geometries.
  • the invention is preferably used in a stator for use, the interior of which - in the desired geometry - in cross section has the shape of a slot formed by two semicircles, which are connected to each other via corresponding parallel lines.
  • the material Vorvorungen are preferably provided in the region of the semicircular geometry. It may be expedient to dimension the material projections in the region of the semicircles greater than in the region of the connecting straight line. However, this consideration may be combined with other considerations, so that z. B. in a region of the semicircular geometry then still dispensed with a material provision, when this area coincides with a parting plane of a longitudinally divided stator. Incidentally, in the overall design then the construction of the stator shell of z. B. several shell segments and associated therewith the possibly existing separation gaps between the shell segments considered.
  • the invention also covers stators with a stator geometry differing from the slot geometry described.
  • a slot-shaped cross-section may be provided, in which the ends are not exactly semicircular, but have a measure beyond the semicircle, so that a quasi bone-like structure is created (see, eg, EP 0 381 413 A2).
  • geometries can be used which deviate completely from the slot shape. For example, reference is made to DE 602 107 and WO 2004/031584 A1.
  • the invention is not only the eccentric screw pump described, but in particular also a rotor / stator combination, which has a stator on the one hand and a rotor on the other hand, wherein the stator is made in the manner described with oversize geometry. Consequently, the rotor / stator combination is also independently protected.
  • the subject of the invention is a stator of such a rotor / stator combination or for such a pump. That is, the stator with oversize geometry is also placed under protection, since such a stator according to the invention can be used in practice without modifying the rotor and the other pump parts.
  • the stator can be made of elastomeric material z. B. by injection molding ("injection molding") or molding ("compression molding") produce.
  • the elastic material may be z. B. an elastomer, for. B. a synthetic rubber or a rubber mixture act. But there are also composites of an elastomer and another material, eg. As metal, includes.
  • Such a stator is particularly preferably used in connection with eccentric screw pumps, which on the one hand have a clampable stator jacket and, on the other hand, a longitudinally divided stator.
  • the pump according to the invention or the stator according to the invention can be designed for a high operating pressure or a high internal pump pressure.
  • Vorvorungen is prevented that a pressure-induced deformation leads to an interruption of the sealing line.
  • the formation of backflows is avoided or at least significantly reduced, so that such a backflow does not have to be compensated by an increased delivery. This can z.
  • suction-side overclamps and associated temperature increases can be avoided.
  • eccentric screw pumps can be operated with a high differential pressure. Furthermore
  • an eccentric screw pump which has in its basic structure a stator 1 made of an elastic or elastomeric material and a rotating in the stator 1, helical rotor 2, wherein the stator 1 is surrounded by a stator shell 3. Furthermore, the pump has a pump housing 4, which (depending on the operating direction) is referred to as a suction housing. In addition, the pump has a connection piece 5, which is also referred to as a discharge nozzle. Not shown is also provided drive, the drive via a
  • coupling rod 6 operates on the rotor 2.
  • the coupling rod 6 is connected via coupling joints on the one hand to the rotor 2 and on the other hand to a drive shaft, not shown, wherein of the coupling joints only the rotor-side hinge 7 is shown.
  • the stator 1 is formed in the illustrated embodiment as a longitudinally divided stator, so that it consists of two stator sub-shells 1 a, 1 b, which are formed in the embodiment as half shells, each covering an angle of 180 °.
  • Longitudinal means along the stator longitudinal axis L or parallel to this. The separating cut between the partial shells consequently runs along or parallel to the longitudinal axis L.
  • This longitudinally divided configuration of the elastomeric stator 1 makes it possible to disassemble and assemble the stator 1 when the suction housing 4, the discharge nozzle 5 and the rotor 2 are mounted.
  • the stator shell 3 is also formed in the illustrated embodiment as a longitudinally divided shell and it has a plurality of shell segments 8. These may be two, three, four or more shell segments 8. In the figures, an embodiment with four sheath segments 8 is shown.
  • This stator jacket 3 with its jacket segments 8 forms a Statorspannvorraum or Statoreinstellvorraum, with which on the one hand the longitudinally divided stator 1 fix and seal and on the other hand, a desired voltage or bias of the stator 1 can be adjusted. This adjustment can be done with known from the prior art measures. This is z. Reference is made, for example, to DE 10 2008 021 920 A1 and DE 10 2014 1 12 550 A1.
  • stator 1 and its stator shells 1 a, 1 b have on the outside projecting stator bars 9, which extend over the entire stator length or at least almost the entire stator length and which z. B. externally formed on the stator 1, z. B. can be vulcanized.
  • stator webs 9 engage in the assembled state in separating gaps 10 and spaces between the individual shell segments 8, so that they are clamped between two adjacent shell segments 8 and thus form a rotation and absorb the torques during operation.
  • the stator 1 has a helical interior 1 1, in which the rotor 2 rotates.
  • the rotor 2 is also helical, wherein the rotor 2 has a smaller number of turns than the stator 1 and as the interior 1 1 of the stator 1.
  • the rotor 2 is catchy and the stator 1 and its interior 1 1 slaughter labor formed.
  • the rotor 2 is in operation via one or more uninterrupted sealing lines on the inner surface of the stator 1, said sealing lines separate delivery spaces from each other in the course of the rotation of the rotor from the suction side S to the pressure side D out (continuously).
  • the stator 1 has in this embodiment, a desired geometry, which has a constant cross-section over the length in the clamped operating state.
  • this cross-section is formed at any point of the stator slot-shaped, wherein such a slot 12a, b composed of two half circles 12a and two connecting lines 12b.
  • a stator 1 which, in the unstressed, pressureless state, has an oversize geometry deviating from the desired geometry with one or more oversize regions 13, which as material projections 13 extend beyond the desired geometry SG in the direction of the rotor and consequently toward the interior are formed and each extending only over a limited length range.
  • oversize areas which serve as material projections 13 during operation under pressure, are shown in FIGS. 3 and 4.
  • the Materialvoreuticen / Kochschreib Symposium Struct 13 are dimensioned so that approaches the actual geometry to the desired geometry SG or particularly preferably the desired geometry is set in the clamped operating condition at a given operating pressure.
  • the embodiment according to the invention therefore has the advantage that the desired geometry SG, which is designed for optimum operation, is not set under pressure in the unassembled state, but only in the assembled and tensioned state.
  • This is achieved by the material projections 13, which are arranged in particularly critical areas of the stator 1.
  • material projections 13 may be arranged in particular in areas of the stator, which are assigned to one or more separating gaps 10 between two shell segments 8, so that a deflection of the elastomeric material in this area can be compensated by the material provision.
  • Stator 1 in the illustrated embodiment over the length has a non-constant wall thickness W1, W2.
  • stators 1 with non-constant wall thickness are known from the prior art, they are widely used in practice.
  • the material projections 13 are provided in such a stator in the range of low wall thicknesses W1.
  • material pretensions are dimensioned larger in the area of low wall thickness W1 than in areas with greater wall thickness W2.
  • FIG. 3a An exemplary embodiment is shown in Fig. 3a. It can be seen that the material projections 13a are provided as a function of the orientation of the stator geometry or of the oblong hole, wherein the configuration illustrated in FIG. 3a preferably relates to the divided stator jacket illustrated in FIG. So z. B.
  • FIG. 3b it is shown in FIG. 3b that a plurality of material projections 13 are provided in different length regions of the stator, which, however, are optionally dimensioned differently.
  • the material projections 13 are dimensioned smaller in the area of the suction side S than in the region of the pressure side D.
  • the thickness of the material projections 13 can consequently decrease from the pressure side D to the suction side S or increase from the suction side S to the pressure side D.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention concerne une pompe à vis sans fin excentrée, comprenant un stator (1) en matériau élastique ou élastomère qui définit un espace intérieur (11) de forme hélicoïdale, une enveloppe de stator (3) qui entoure le stator (1) et qui peut être tendue dans le sens radial contre le stator (1), un rotor (2) de forme hélicoïdale en rotation excentrique dans le stator. L'espace intérieur du stator (1) possède une forme géométrie voulue qui, à l'état opérationnel tendu, possède une section transversale constante sur la longueur. La pompe est caractérisée en ce que le stator (1), à l'état non tendu et hors pression, présente une forme géométrique à surcote différente de la forme géométrie voulue, comprenant une ou plusieurs zones de surcote qui sont réalisées sous la forme de réserves de matériel (13) dépassant de la forme géométrie voulue dans la direction du rotor et qui s'étendent respectivement sur une zone de longueur limitée.
PCT/EP2018/055216 2017-03-07 2018-03-02 Pompe à vis sans fin excentrée WO2018162360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017104768.9A DE102017104768A1 (de) 2017-03-07 2017-03-07 Exzenterschneckenpumpe
DE102017104768.9 2017-03-07

Publications (1)

Publication Number Publication Date
WO2018162360A1 true WO2018162360A1 (fr) 2018-09-13

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ID=61691445

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/055216 WO2018162360A1 (fr) 2017-03-07 2018-03-02 Pompe à vis sans fin excentrée

Country Status (2)

Country Link
DE (1) DE102017104768A1 (fr)
WO (1) WO2018162360A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023126119A1 (fr) 2021-12-30 2023-07-06 Seepex Gmbh Stator pour une pompe à vis excentrique

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602107C (de) 1930-05-13 1934-09-03 Rene Joseph Louis Moineau Als Pumpe, Motor oder einfaches UEbertragungsgetriebe verwendbare Vorrichtung aus zwei ineinander angeordneten Teilen mit dauernd in Beruehrung stehenden Zaehnen
DE1553149A1 (de) * 1966-04-20 1970-10-08 Netzsch Maschinenfabrik Speisevorrichtung fuer Schneckenpumpen
DE2017620A1 (de) * 1970-04-13 1971-11-04 Gummi-Jäger KG, 3000 Hannover Exzenterschneckenpumpe
US4773834A (en) * 1983-08-16 1988-09-27 Patrick J. Quinn Progressive cavity pump
EP0381413A2 (fr) 1989-02-01 1990-08-08 Mono Pumps Limited Pompe à vis excentrée
WO2004031584A1 (fr) 2002-09-27 2004-04-15 Wilhelm Kächele GmbH Elastomertechnik Pompe a vis sans fin excentrique
DE102008021920A1 (de) 2007-08-17 2009-02-19 Seepex Gmbh Exzenterschneckenpumpe
WO2012122321A2 (fr) * 2011-03-08 2012-09-13 Schlumberger Canada Limited Section de palier/d'engrenage destinée à un rotor/stator à modulation pdm
DE102014112552A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
DE102014112550A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
DE102015104549A1 (de) 2015-03-26 2016-09-29 Netzsch Pumpen & Systeme Gmbh Dichtlinienoptimierte Exzenterschneckenpumpe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313442A1 (de) 1993-04-24 1994-10-27 Resch Maschinen Und Geraetebau Fluidpumpe

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602107C (de) 1930-05-13 1934-09-03 Rene Joseph Louis Moineau Als Pumpe, Motor oder einfaches UEbertragungsgetriebe verwendbare Vorrichtung aus zwei ineinander angeordneten Teilen mit dauernd in Beruehrung stehenden Zaehnen
DE1553149A1 (de) * 1966-04-20 1970-10-08 Netzsch Maschinenfabrik Speisevorrichtung fuer Schneckenpumpen
DE2017620A1 (de) * 1970-04-13 1971-11-04 Gummi-Jäger KG, 3000 Hannover Exzenterschneckenpumpe
US4773834A (en) * 1983-08-16 1988-09-27 Patrick J. Quinn Progressive cavity pump
EP0381413A2 (fr) 1989-02-01 1990-08-08 Mono Pumps Limited Pompe à vis excentrée
WO2004031584A1 (fr) 2002-09-27 2004-04-15 Wilhelm Kächele GmbH Elastomertechnik Pompe a vis sans fin excentrique
DE102008021920A1 (de) 2007-08-17 2009-02-19 Seepex Gmbh Exzenterschneckenpumpe
WO2012122321A2 (fr) * 2011-03-08 2012-09-13 Schlumberger Canada Limited Section de palier/d'engrenage destinée à un rotor/stator à modulation pdm
DE102014112552A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
DE102014112550A1 (de) 2014-09-01 2016-03-03 Seepex Gmbh Exzenterschneckenpumpe
DE102015104549A1 (de) 2015-03-26 2016-09-29 Netzsch Pumpen & Systeme Gmbh Dichtlinienoptimierte Exzenterschneckenpumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023126119A1 (fr) 2021-12-30 2023-07-06 Seepex Gmbh Stator pour une pompe à vis excentrique
DE102021006414A1 (de) 2021-12-30 2023-07-06 Seepex Gmbh Stator für eine Exzenterschneckenpumpe

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