EP1522729B1 - Pompe à cavité progressive et stator pour une telle pompe - Google Patents

Pompe à cavité progressive et stator pour une telle pompe Download PDF

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Publication number
EP1522729B1
EP1522729B1 EP03022804A EP03022804A EP1522729B1 EP 1522729 B1 EP1522729 B1 EP 1522729B1 EP 03022804 A EP03022804 A EP 03022804A EP 03022804 A EP03022804 A EP 03022804A EP 1522729 B1 EP1522729 B1 EP 1522729B1
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EP
European Patent Office
Prior art keywords
stator
rotor
casing
axial
elastomer
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.)
Expired - Lifetime
Application number
EP03022804A
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German (de)
English (en)
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EP1522729A1 (fr
EP1522729B2 (fr
Inventor
Gerd-Joachim Feltz
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ITT Bornemann GmbH
Original Assignee
Joh Heinr Bornemann GmbH
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Priority to AT03022804T priority Critical patent/ATE349617T1/de
Priority to EP03022804A priority patent/EP1522729B2/fr
Priority to DE50306120T priority patent/DE50306120D1/de
Priority to ES03022804T priority patent/ES2279917T5/es
Application filed by Joh Heinr Bornemann GmbH filed Critical Joh Heinr Bornemann GmbH
Publication of EP1522729A1 publication Critical patent/EP1522729A1/fr
Publication of EP1522729B1 publication Critical patent/EP1522729B1/fr
Priority to CY20071100401T priority patent/CY1106407T1/el
Publication of EP1522729B2 publication Critical patent/EP1522729B2/fr
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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
    • 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 elongated feed pump as an eccentric screw pump, consisting of a stator and a rotor.
  • the stator may have a cylindrical outer sheath, preferably of metal, and a hollow sheath of a "rigid-elastic" material with a spiral-shaped inner surface and held or receivable by the same. He takes on a corresponding helical or helical rotor. Stator and rotor have the same direction slopes. Also of relevance is the stator itself, with "tight-elastic" lining or elastomeric jacket.
  • Such pumps are known for various applications, for example as a feed pump for mortar mixtures or other abrasive conveying fluid, see. DE-B 33 04 751 (KTO) with "conical bias" between stator and rotor, becoming stronger to the output MAS.
  • a pump with Elastomerstator is known from DE-A 197 58 086 (Artemis). It corresponds to the preamble of claim 1. In her, a quick installation of the lining should be possible. An axially projecting elastomeric ring is provided for a sealing axial mounting.
  • DE-A 198 01 021 (Hunter) is configured.
  • a metallic, mostly hardened rotor is driven in rotation in operation in one of its pitch or helix opposite sense.
  • a corresponding axial holding force must be applied by the input side drive shaft, possibly above the rotor upstream equipment parts, such as clutch, driver, mixing tool or the like .. become.
  • the axial holding force arises as a "Reactio" by the “Actio” caused by the conveyance and forward movement of the conveyed material and the rotation of the rotor in the stator, after the rotor against the pitch of its helix and against the pitch of the helix of the inner lining of the stator (the inner shell) is driven in rotation by the drive means (on the input side).
  • the jacket In order to facilitate the entry of the medium to be pumped ("conveying fluid") into the pump, the jacket (stator) is often widened funnel-shaped on the inlet side.
  • the invention is based on the object to remedy the situation and to ensure greater service life, to prevent a change in the consistency of the medium to be conveyed and to avoid sudden losses of capacity at almost new replaced components.
  • the described defect alleviated by the invention appeared to be a problem of the elastomer which prematurely worn out at the sealing points (the radially inwardly projecting ribs of the elastomeric helical coil) through an axially extending notch or groove thereby opening or closing a channel for backflow Achieved a poor seal between the helical rotor and the inner surface of the elastomeric lining of the outer shell.
  • the cause was or was not in the elastomer compound or its processing or incorporation, but first had to be identified where the actual cause of this occurring and on a removed stator visible fault symptom was.
  • To this described backflow channel in the interior of the stator a near the outlet end circumferentially into the stator or its elastomeric lining cut groove joined.
  • the area which is (or would) be damaged by the sickle-shaped edge of the rotor is omitted without altering the actual length of the pump, that is to say without having to shorten the stator with its outer jacket or to make other modifications on site.
  • the rotor moves with its crescent-shaped edge in a free space.
  • the edge does not receive a compliant countermeasure where, upon displacement of its axial position, it could damage the stator with its elastomeric interior to trigger the chain of events that the user perceives as a "thick / thin" symptom.
  • stator and rotor which is important for optimum delivery performance, is not more given.
  • the creation of a clearance symbolizes avoiding a damaging contact of the crescent-shaped circumferential end edge (also called peripheral edge) in a rotating movement of the rotor with respect to the elastomeric, ie compliant and softer inner shell of the contrast, much stiffer outer shell of the stator.
  • the clearance symbolizes an axial extent and a radial extent for a reduction of the strength of the elastomeric lining (claim 3, claim 4), or vice versa, a widening of the worm gear in the radial direction on a predetermined axial piece near the exit on the pressure side of the stator.
  • a circumferential sealing web (claim 16) may also be formed axially projecting and radially far outward on the elastomeric end face, but in its axial extent is substantially less than 2% of the axial length of a stator pitch (a screw stage or a stage on the other hand, he has a completely different task, that of the axial and radial sealing of the connection point of the stator to the further functional parts, without that he would be functionally related to the crescent-shaped end of the rotor or a geometry of the rotor.
  • a stator pitch a screw stage or a stage on the other hand
  • a reduction of the A-measure in the conveying direction in the continuing pressure-loaded section of the screw pump refers to a respective pitch stage in terms of their beginning and their end.
  • the inside width of the inner shell is further reduced substantially uniformly per level.
  • a combination of helical formation and conical expansion of the shell in the exit region provides a lightweight manufacturing technique (claim 8).
  • the screw shell is no longer tapered conically to the pressure-side end, but slightly or more expanded, retains its basic snail shape and in addition receives a conically widening shape.
  • the conicity in the direction of compression in this section which is endangered by the crescent-shaped engagement, runs as "counter-conicity", in the sense of an expansion and not a narrowing of the clear space formed by the helical inner surface of the elastomeric inner jacket.
  • This "widened conicity” can be compared with such a “reducing conicity” or such a clear space, which lies axially further forward, ie opposite to the conveying direction (claim 8), or immediately before the beginning of the counterconceptivity ("widening" conicity) ,
  • the expansion extends radially on an axial length such that both directions together achieve a reduction in the wall thickness of the elastomeric inner liner in this axially short piece on the exit side.
  • a cylindrically shaped expansion, retraction or wall thickness reduction (claim 6, claim 16) can pass directly into a circumferentially extending sealing ridge at the front end.
  • the eccentric screw pump has in the example, as shown in Figure 1 , an outer cylindrical elongated housing 1 of a predetermined diameter and predetermined length.
  • the housing may be made of steel, for example.
  • a hollow cylindrical shell for example, made of high-wear rubber or the like.
  • the inner surface 3 has a helical contour for the formation of a double-flighted screw channel with double pitch.
  • the screw channel is conically widened, as shown at 4, to prevent the entry of an eligible medium to be conveyed to the exit side MAS as a fluid, eg a mixture of water and a Additive to facilitate.
  • the stator can be axially slotted or multi-part, which is not shown separately.
  • a screw 6 In the inner jacket of the stator 2 is a screw 6, e.g. made of hardened steel.
  • the pitch direction 7 is the same for stator and rotor.
  • the longitudinal axis 11 of the coiled rotor portion is radially offset from the center axis 10 of the screw flights of the stator (the axis of rotation of the rotor) by 2 * e, resulting in the eccentricity 9 (or "e").
  • the rotor 6 On the inlet side MES, the rotor 6 is extended beyond the beginning of the stator at 8 to form in the axis 10 a screw head 17 (Fig. 3a), via which the rotor can be driven in a direction of inclination of stator and rotor opposite sense.
  • the outlet opening 5 of the stator of the pump is specially designed on the outlet side MAS. Further details below.
  • a taper k is represented by a black, increasing edge region of the helical screw in Figure 1, which is operated with an increasing contact pressure from the input side 4 to the output side 5 to account for the increasing delivery pressure and the sealing lines to delineate the delivery chambers better in elastomeric stator jacket 2 form.
  • Such delivery chambers are illustrated in the upper portion of Figure 1 between the screw channel (formed by the réellewandformung 3 of the elastomeric liner 2) and the outer wall of the elongated coil 6.
  • the sealing lines of the chambers are represented in cross section by the short black overlap strips which, even during operation, do not overlap, but by yielding the elastomeric material create a pressure sealing effect to the stator as well as the continuous zone k.
  • the axial direction is denoted by z, also as a conveying direction, wherein the two axes 10, 11 are offset eccentrically and can be seen with the offset 9.
  • the consequence of the wear is that the rotor has changed its position z1 relative to the stator by the offset 19, whereby it has migrated into the stator counter to the conveying direction.
  • the measure .DELTA.z corresponds to the offset 19 and the widening of the provided with a recording worm head 17 in the coupling 18 on the driver 16 of the mixing tool 15, wherein in particular the locations indicated in Figure 3b with v wear of an axial removal of the non-hardened driver tool relative to the Hardened steel of the rotor subject.
  • Figures 2 show the stator in a normal training.
  • the inlet end 4 is flared, while the worm gear is unchanged as far as in the direction perpendicular to the axis 10 extending plane 22, in which the outlet-side opening 5 'of the shell 2 is located.
  • a rotor such as the rotor 6 according to FIG. 1 is in its working position z1 and driven in rotation, it performs a considerable flexing work on the elastomer casing 2 surrounding it.
  • a crescent-shaped edge 24 is correspondingly involved in the output-side end face 25 of the rotor 6, since in the shell of Figure 2a, the worm threads continue unchanged to the mantle end face in the plane 22.
  • the crescent-shaped end edge 24 works thereby, when the offset .DELTA.z becomes larger, in the material of the shell, and causes a corresponding notch or even a cut. These can have a radial depth of up to 3 mm and more.
  • the jacket elastomer becomes hot, up to 60 ° to 70 ° Celsius and bulges, folds a little way inwards, and reduces the outlet cross-section of the opening 5 for the conveyed medium (conveying fluid).
  • the outlet opening 5 of the shell 2 is widened compared to an assumed regular screw surface course and thus precludes a pressure-exerted touch the crescent-shaped end edge 24 of the rotor with the jacket 2 during operation, preferably even if the rotor due to wear of parts in the drive path (s 3) changes its predetermined regular axial position z1 relative to the stator counter to the conveying direction (by offset 19 or ⁇ z in FIG. This creates a state as it is pictorially represented as clearance or exemption G.
  • the crescent-shaped edge 24 shown in section as a sharp, less than 180 ° having cutting edge, does not touch the elastomeric sheath 2, but a distance is provided.
  • a further axial backward displacement by more than ⁇ z according to FIG. 3b would lead to an axially further displaced axial position of the rotor 2 in connection with a potentially pending (loading) contact, despite a widened configuration of the outlet opening 5.
  • a pure contact itself is not harmful yet, only one which leads with additional pressure load to a cutting action in the elastomer, which would then cause the axially further to the pressure side portion of the elastomer jacket to unwanted displacements radially inward.
  • the area of the reduction of the jacket wall thickness 2 near the end face at the exit MAS is not a large axial distance, but a substantial radial widening of the exit opening 5.
  • a step L1 according to FIG are taken, several of which are provided along the entire length L of the stator by the elastomeric inner lining.
  • a change in the clear dimension of the interior can be indicated by specifying the percentage reduction, corresponding to a percentage reinforcement or thickening of the elastomer jacket 2 become.
  • This indication can also extend to the fact that the A-measure and the C-measure according to FIG. 2b are specified as changing in the course of the z-direction.
  • the two dimensions A and C define the largest and smallest dimension of the interior, corresponding to the largest and the smallest distance of the inner surface of the elastomeric lining 2 in the section of Figure 2a.
  • the shape of the widening 5 of the end MAS of the stator can be different.
  • the widening 5a is conically shaped approximately in accordance with the widening at the entry end 4.
  • the plan view of the flared end is shown in FIG. 5b.
  • FIG. 6 A similar plan view results in the embodiment according to FIG. 6 , in which the widening 5b has a stepped design. This corresponds to a substantially cylindrical retraction of the elastomer wall 2 '.
  • FIG. 4 corresponds with the widening 5c substantially to the shape shown in FIG. 1, with an additional screw portion in the z5 section.
  • FIG. 4b shows the corresponding plan view.
  • FIG. 5b shows a bevel at the widening or widening 5a
  • FIG. 6b a cylindrical recess 5b, or a plan view at an end-face, radially directed surface
  • FIG. 4b a combination of a conical widening connected to a helical leakage 5c at conicity other than that which led to the widening portion of length z5 (in the previously stored area and the preceding stages).
  • Such a helical formation connected to a conical or cylindrical configuration can also be described as a conical shape is maintained, with inverted conicity, so one that relaxes a compressive load, or does not arise and is directed outwards to a thinner wall thickness 2 'of the elastomeric jacket 2, or but significantly and more so conically widened that gap distances between a crescent-shaped edge 24 of Figure 1 and the inner surface of the expansion 5 can be seen even with a built-rotor.
  • All embodiments have in addition a frontally arranged circumferential web-shaped seal 21, for sealing attachment to further intermediate sections (recording) in the transition section to the delivery hose on the Pressure side.
  • This circumferential ridge 21 is disposed radially far outward on the elastomeric inner jacket, near the rigid housing or outer jacket 1. It extends in the axial direction by far less than 2% of a step length L1, and has no influence on the protection of the inner wall of the elastomer liner 2 against damage caused by the rotor. When installed, this bridge is almost completely compressed.
  • FIG. 6a To illustrate the axial extension and the radial widening, a group of reference symbols is shown in FIG. 6a , such that the residual wall thickness 2 'which arises after introduction of a cylindrical recess 5b or a cylindrical expansion 5b preferably matches a radial thickness of the circumferential web just explained 21.
  • the axial extent z5 of the retraction or widening generally to be described as "clearance G" of Figure 1, shall be related to the length L1 of a step (a thread).
  • the size of the radial expansion r5 corresponds to a shape along the axial distance z5 on which the expansion r5 takes place. It does not have to be constant, but, as can be seen from FIGS. 5a and 4a , can vary circumferentially and also assume different values in the longitudinal direction z.
  • the widening or widening for the release of the jacket from the end edge of the rotor should be at least 2%, preferably above 3%, or 5% to 10% of a stage L1 of the stator worm 3.
  • a stage L1 of the stator worm 3 is shown in FIG.
  • the lower limit of the extension is about 2 mm to 4 mm, but may also be 5 mm to 11 mm and more, up to a half step.
  • the occurring reduction of the pump-effective length of the stator is compensated by a corresponding increase in the bias voltage k between the rotor and stator.
  • the conicity can be seen in the sectional view through inclined connecting lines 21 in FIGS. 5a, 6a . They correspond to the illustrated conicity k, which ensures an increased bias to the pressure side.
  • the change in taper takes place in an advantageous manner by continuous change of the A-measure.
  • the percentage reduction of this level per level should be at least 0.4%.
  • the number of stages of the stator is equal to the stator length divided by the pitch of its flights.
  • the conicity of the stator screw results from the difference the C and A measures MES entry and exit MAS, where the reduction is evenly distributed over the number of slopes (steps).
  • the mean of the A measure per step is the A measure at the entrance of the step less the A measure at the exit of the step.
  • the percentage reduction of the A measure per step is understood to mean the A measure difference per step multiplied by 100 and divided by the A measure at the input of the step.
  • the A dimension is reduced in the conveying direction, ie in the direction of the stator output MAS.
  • a segregation, ie a consistency change of the pumped medium, as well as early wear of the pump parts can be avoided in a very simple manner and with the possibility to compensate for a reduction in the purchase of pump power.

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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)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (18)

  1. Pompe à vis sans fin excentrique comprenant une enveloppe interne (2), constituée d'un matériau résistant à l'usure et élastique, dans une enveloppe de boîtier cylindrique (1) en une ou plusieurs pièces; une surface interne (3) de l'enveloppe (2), ou enveloppe interne (2), présentant, sur sa face (3) tournée vers l'intérieur, la forme d'un pas de vis avec un sens et une longueur prédéterminés du pas de vis;
    un rotor spiralé ou hélicoïdal (6,8), inséré sous précontrainte dans l'enveloppe dans une première position axiale (z1) et avec une excentricité radiale (9) et maintenu du côté de l'entraînement dans cette position (15,16), avec le même sens de pas de vis (7) que celui du stator (2); caractérisée en ce qu'une ouverture de sortie (5) du stator (2) est élargie depuis son extrémité frontale sur une partie de la longueur axiale de transport radialement vers l'extérieur sur toute la circonférence, de sorte qu'une arête frontale (24), tournant lors du fonctionnement de la pompe, de l'extrémité (23) du rotor située près de l'ouverture de sortie - de préférence lors d'un décalage axial (19;Δz) du rotor dû à l'usure - puisse tourner sans contact ou librement (G) par rapport à la surface interne (3) du stator.
  2. Pompe à vis sans fin excentrique selon la revendication 1, comportant un stator constitué d'un boîtier cylindrique (1) d'une seule pièce et de l'enveloppe interne (2) en matériau élastomère qui y est agencée fixement, dont la surface interne (3) s'étend en spirale ou en hélice autour de l'axe longitudinal (10;z), et un rotor hélicoïdal allongé (6), qui est agencé, de manière décalée radialement dans une mesure prédéterminée (9,e) avec son axe central (11) par rapport à l'axe longitudinal (10) du stator, dans une position axiale donnée (z) par rapport au stator dans celui-ci, qui présente la même direction de pas de vis que celle de l'enveloppe interne, qui peut être entraîné en rotation
    - à l'opposé du sens du pas de vis de la surface interne (3) de l'enveloppe interne - et qui est maintenu d'un côté entraînement (8) dans la position axiale donnée (z); dans laquelle
    - l'enveloppe interne (2) est évidée ou élargie, à partir de sa face avant côté sortie (22) tant dans la direction radiale que dans la direction axiale dans une mesure telle qu'une arête frontale côté sortie (24) du rotor (6) tourne de manière excentrique en périphérie lors d'un fonctionnement de la pompe - ne sollicitant pas la face interne (3) de l'enveloppe (2);
    - on prévoit, pour compenser une perte de performances, une diminution, distribuée sur le restant de la longueur du stator, d'une plus grande largeur intérieure (mesure A) des canaux à vis formés par la surface interne (3) dans le stator (2), pour obtenir une conicité plus forte.
  3. Pompe à vis sans fin excentrique selon la revendication 1 ou 2, caractérisée en ce qu'il y a un passage libre (G) de l'arête périphérique (24) côté sortie du rotor (6), généré par un décalage radial et axial d'une face frontale (22) côté sortie de l'enveloppe de stator (2) axialement à l'opposé du sens de transport sur une section de longueur (z5) qui correspond au moins à 2% d'une longueur axiale d'un pas de stator (spire de vis sans fin L1), en particulier à plus de 3%, entre 5% et 10% ou jusqu'à une demi-spire.
  4. Pompe à vis sans fin excentrique selon la revendication 3, caractérisée en ce que l'on dimensionne le décalage en particulier sous la forme d'un évidement ou d'un élargissement de sorte que le passage libre (G) soit conservé même lors d'un décalage axial du rotor (6) dû à l'usure (19, Δz).
  5. Pompe à vis sans fin excentrique selon l'une quelconque des revendications précédentes, dans laquelle, pour compenser la perte de performances apparaissant du fait du décalage d'une section (z5) de la face frontale (22) côté sortie du stator (2) et la réduction consécutive de son au moins un pas de vis efficace en transport,
    (i) on prévoit une réduction de la largeur intérieure du canal de vis sous la forme d'une réduction de la mesure A dans le sens de transport par spire de vis sans fin (L1) de l'enveloppe de stator (2) d'au moins 0,4%; ou
    (ii) on diminue une largeur intérieure de l'enveloppe interne par spire (L1) de plus de sensiblement 0,4%, la largeur intérieure de l'ouverture d'entrée (4) se réduisant sensiblement en permanence par rapport à l'ouverture de sortie (5).
  6. Pompe à vis sans fin excentrique selon la revendication 1 ou 2, dans laquelle l'élargissement possède une section de forme sensiblement cylindrique (5b).
  7. Pompe à vis sans fin excentrique selon la revendication 1 ou 2 ou 6, dans laquelle l'élargissement (5) de l'ouverture côté pression possède une section de forme sensiblement conique (5a), en particulier même avec un élargissement sensiblement conique sous la forme d'un cône d'entrée (4) sur la face d'entrée (MES) du stator ou de la pompe.
  8. Pompe à vis sans fin excentrique selon la revendication 1 ou 2 ou 7, dans laquelle, sur une partie (z5) de la longueur axiale proche de la face de sortie (MAS), la surface interne hélicoïdale (3) s'étend radialement vers l'extérieur et axialement vers l'avant du côté de pression (5c), en particulier à l'encontre d'une réduction, s'étendant sensiblement en permanence, de la dimension radiale de la surface interne (3) avant la partie axiale mentionnée (z5), en commençant près de la face d'entrée du stator ou de la pompe.
  9. Pompe à vis sans fin excentrique selon la revendication 1 ou 2, dans laquelle une extrémité frontale côté pression du stator porte une nervure élastomère annulaire (21) pour assurer l'étanchéité lors d'un montage du stator, à l'encontre d'un logement côté pression.
  10. Procédé pour faire fonctionner une pompe à vis sans fin excentrique comprenant une enveloppe (2) en matériau élastomère qui peut être insérée dans un boîtier sensiblement cylindrique (1) ou y être agencée, dont la surface interne (3) se présente sous la forme d'un pas de vis pour recevoir un rotor spiralé (6) insérable sous précontrainte dans l'enveloppe élastomère dans une position axiale prédéterminée et avec une excentricité radiale (9) prédéterminée et soutenu du côté entraînement dans cette position;
    caractérisé en ce qu'une ouverture de sortie (5;5a,5b,5c) du stator (2) est élargie depuis son extrémité frontale et à l'encontre d'un sens de transport axial ou s'étend radialement de sorte que, lors du fonctionnement de la pompe, une arête frontale (24) tournant en périphérie à l'extrémité (23) du rotor (6) - de préférence avec un décalage axial (19;Δz) du rotor, par rapport au stator - tourne sans contact ou sans contact de pression sensible avec la surface interne (3) de l'enveloppe élastomère (2).
  11. Procédé selon la revendication 10, dans lequel le boîtier cylindrique est formé d'une seule pièce sous la forme d'une enveloppe périphérique continue ou est doté d'au moins une fente axiale ou est formé de plusieurs pièces avec plusieurs fentes axiales.
  12. Procédé selon la revendication 10, dans lequel l'extension ou l'élargissement (5a,5b;5) à l'extrémité frontale côté pression du stator a une forme sensiblement cylindrique, conique ou en pas de vis, ou présente une combinaison de ces sections.
  13. Procédé selon la revendication 10, dans lequel le stator sur sa face d'entrée frontale possède un élargissement (4) se présentant en particulier sous une forme conique.
  14. Procédé selon la revendication 10, dans lequel la longueur (z5) remontant axialement de l'élargissement (5) est supérieure à 2%, de préférence de 5% et inférieure à 50% de la longueur axiale (L1) d'une spire du pas de vis du stator par rapport au pas de vis de celui-ci.
  15. Stator d'élastomère, convenant à une pompe à vis sans fin excentrique selon la revendication 1, comprenant une enveloppe externe sensiblement rigide et une enveloppe interne (2), qui y est agencée, en matériau élastomère plus mou par rapport à l'enveloppe externe, dont la surface interne (3) est réalisée en s'étendant de manière hélicoïdale autour d'un axe longitudinal (10), pour le logement d'un rotor hélicoïdal excentrique (6), qui peut être introduit dans une position axiale prédéterminée (z1) par rapport à l'enveloppe du stator, dans ce dernier, et qui est maintenu du côté entraînement dans sa position axiale (18,16,17), dans lequel l'enveloppe interne d'élastomère (2) se présente avec une réduction depuis son front côté sortie (z5)
    (i) dans la direction axiale
    (ii) par rapport à une surface interne hélicoïdale (3) axialement plus en avant (par rapport à la face de sortie MES) dans la direction radiale (r5), pour fournir un passage libre (G) à une arête frontale (24) côté sortie du rotor (6) lors du fonctionnement de la pompe, et dans lequel la surface interne hélicoïdale (3) diminue sensiblement en permanence à partir de la face d'entrée frontale dans sa mesure interne jusqu'avant d'atteindre l'épaisseur de paroi de l'enveloppe élastomère (2) se présentant sous forme réduite (r5,z5).
  16. Stator d'élastomère selon la revendication 15, dans lequel, côté sortie (MAS), une nervure périphérique (21) est constituée d'un matériau élastomère qui dépasse axialement, en particulier, il y a une réduction sensiblement cylindrique de l'épaisseur de paroi de l'enveloppe élastomère (2) entre la nervure (21) et le début du premier élargissement radial (r5,5b) s'étendant axialement sur une partie (z5).
  17. Stator élastomère selon la revendication 16, dans lequel une épaisseur de paroi restante (2') de l'enveloppe interne élastomère dans la zone de l'élargissement radial (5b) possède sensiblement la même épaisseur radiale que celle de la nervure périphérique (21) dépassant côté sortie (MAS).
  18. Stator élastomère selon la revendication 15, dans lequel la mesure intérieure de l'enveloppe interne hélicoïdale (3) diminue par spire d'au moins 0,4%, jusqu'avant l'élargissement radial (5,5a,5b,5c).
EP03022804A 2003-10-07 2003-10-07 Pompe à cavité progressive et stator pour une telle pompe Expired - Lifetime EP1522729B2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT03022804T ATE349617T1 (de) 2003-10-07 2003-10-07 Exzenterschnecken-pumpe und stator für eine solche pumpe
EP03022804A EP1522729B2 (fr) 2003-10-07 2003-10-07 Pompe à cavité progressive et stator pour une telle pompe
DE50306120T DE50306120D1 (de) 2003-10-07 2003-10-07 Exzenterschnecken-Pumpe und Stator für eine solche Pumpe
ES03022804T ES2279917T5 (es) 2003-10-07 2003-10-07 Bomba de tornillo sin fin excéntrico y estator para una bomba semejante
CY20071100401T CY1106407T1 (el) 2003-10-07 2007-03-22 Αντλια με εκκεντρο κοχλια και επαγωγεας για τετοια αντλια

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03022804A EP1522729B2 (fr) 2003-10-07 2003-10-07 Pompe à cavité progressive et stator pour une telle pompe

Publications (3)

Publication Number Publication Date
EP1522729A1 EP1522729A1 (fr) 2005-04-13
EP1522729B1 true EP1522729B1 (fr) 2006-12-27
EP1522729B2 EP1522729B2 (fr) 2013-03-27

Family

ID=34306881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03022804A Expired - Lifetime EP1522729B2 (fr) 2003-10-07 2003-10-07 Pompe à cavité progressive et stator pour une telle pompe

Country Status (5)

Country Link
EP (1) EP1522729B2 (fr)
AT (1) ATE349617T1 (fr)
CY (1) CY1106407T1 (fr)
DE (1) DE50306120D1 (fr)
ES (1) ES2279917T5 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008175199A (ja) * 2006-12-20 2008-07-31 Heishin Engineering & Equipment Co Ltd 一軸偏心ねじポンプ
EP3108142B1 (fr) 2014-02-18 2017-11-15 Vert Rotors UK Limited Machine volumétrique rotative
DE102016009028A1 (de) 2016-07-26 2018-02-01 Netzsch Pumpen & Systeme Gmbh Rotor-Stator-System mit einem Einlauftrichter für eine Exzenterschneckenpumpe
PL3767105T3 (pl) 2019-07-16 2022-05-02 Arnold Jäger Holding GmbH Stojan do pompy ślimakowej mimośrodowej
DE102022100652A1 (de) 2022-01-12 2023-07-13 Knauf Pft Gmbh & Co. Kg Stator für eine Exzenterschneckenpumpe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1303705C2 (de) † 1966-07-06 1973-10-11 Axial foerdernde verdraengerpumpe mit rotierendem pumpelement
GB1215569A (en) * 1969-08-29 1970-12-09 Paul Gerhard Langer Rotary positive-displacement pumps
DE2937403A1 (de) † 1979-09-15 1981-04-02 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Nachstellbarer stator fuer exzenterschneckenpumpen
DE3304751C2 (de) † 1983-02-11 1985-08-01 Kunststofftechnik Obernkirchen GmbH & Co KG, 3063 Obernkirchen Exzenterschneckenpumpe
US6183226B1 (en) † 1986-04-24 2001-02-06 Steven M. Wood Progressive cavity motors using composite materials
DE4442060C1 (de) * 1994-11-25 1996-03-14 Netzsch Mohnopumpen Gmbh Exzenterschneckenpumpe, insbesondere zum Fördern von Medien mit hoher Viskosität oder hohem Feststoffgehalt
DE19531318A1 (de) † 1995-08-25 1997-02-27 Artemis Kautschuk Kunststoff Stator für Exzenterschneckenpumpen
DE19758086A1 (de) * 1997-12-30 1999-07-01 Artemis Kautschuk Kunststoff Elastomerstator für Exzenterschneckenpumpen
DE19801021A1 (de) * 1998-01-14 1999-07-22 Sebastian Jaeger Elastomerstator für Exzenterschneckenpumpen
US6170572B1 (en) † 1999-05-25 2001-01-09 Delaware Capital Formation, Inc. Progressing cavity pump production tubing having permanent rotor bearings/core centering bearings
FR2794498B1 (fr) † 1999-06-07 2001-06-29 Inst Francais Du Petrole Pompe a cavites progressantes a stator composite et son procede de fabrication

Also Published As

Publication number Publication date
DE50306120D1 (de) 2007-02-08
CY1106407T1 (el) 2011-10-12
EP1522729A1 (fr) 2005-04-13
ATE349617T1 (de) 2007-01-15
EP1522729B2 (fr) 2013-03-27
ES2279917T3 (es) 2007-09-01
ES2279917T5 (es) 2013-06-24

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