EP0654125B1 - Pompe a ejecteur a plusieurs etages - Google Patents

Pompe a ejecteur a plusieurs etages Download PDF

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Publication number
EP0654125B1
EP0654125B1 EP93917751A EP93917751A EP0654125B1 EP 0654125 B1 EP0654125 B1 EP 0654125B1 EP 93917751 A EP93917751 A EP 93917751A EP 93917751 A EP93917751 A EP 93917751A EP 0654125 B1 EP0654125 B1 EP 0654125B1
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EP
European Patent Office
Prior art keywords
ejector
pump according
stage
flow
ejector pump
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Expired - Lifetime
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EP93917751A
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German (de)
English (en)
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EP0654125A1 (fr
Inventor
Thilo Volkmann
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids

Definitions

  • the invention relates to a multi-stage ejector according to the preamble of claim 1.
  • Ejector pumps of this type have long been known (FR-A1-25 77 284) and are used both for the production of vacuum and for the conveyance of flowable substances.
  • FR-A1-25 77 284 In order to achieve a high degree of efficiency, in particular with high suction resistances, a successive, multi-stage embodiment is known. This has the advantage that the flow energy of the propellant, which can either be gaseous or liquid, is used until the flow speed has dropped below a value that can no longer be used with design effort.
  • Multi-stage ejector pumps generally have the problem that the size increases disproportionately with the number of stages. This fact is based, among other things, on the fact that the cross section of the flow channel has to increase from stage to stage, and thus in particular the overall height of such an ejector device with several stages is large, without the entire volume of a z. B. rectangular housing could be used.
  • the object of the invention is to improve ejector pumps of the type mentioned in such a way that the size, in particular the height, can be kept small despite the necessary expansion of the flow channel.
  • an ejector according to the invention is comparatively easy to manufacture, in particular from simple (mass) rotating or joining parts.
  • the production can be made of almost any material, such as. B. metal, plastic, glass, ceramics, etc. done.
  • the principle of a ring-shaped flow channel for an ejector is basically already known from DE-A1-34 20 652 - but only for a single-stage ejector.
  • this single-stage ejector it was essential to have a particularly high level of precision when realizing very specific angular relationships and lengths in the area of the nozzle, the mixing zone and the diffuser. This was achieved in that all essential parts such as the nozzle, the mixing zone and the diffuser were formed in only one or both end faces of one-piece blocks, which could be carried out in a single operation on a numerically controlled lathe and contributed to high accuracy and good repetition properties the manufacture of a large number of pumps.
  • a major disadvantage of this known ejector is, on the one hand, in its single stage and, on the other hand, that the suction chamber, via which the material to be conveyed or the substance mixture is fed to the annular, radially outward-acting flow channel, is an annular cross-section widening towards the flow channel Groove is designed, wherein the annular groove is acted upon by the substance or mixture of substances to be conveyed via a number of circumferentially distributed connecting bores which open into a common antechamber.
  • Another disadvantage of this known ejector is its fixation on a very specific surface contour of the flow channel, which only enables optimal pumping performance if the viscosity of the propellant and / or the substance or mixture to be conveyed is within a narrow range of values.
  • different pumps are required. At least the pump block must be replaced, in the end face of which the nozzle, the mixing zone and the diffuser are incorporated.
  • the ejector according to the invention has a number of significant advantages.
  • One advantage is that the invention makes it possible in a simple manner to make the annular geometry of the flow channel accessible, with all the advantages associated therewith, for the realization of a multi-stage ejector.
  • Another advantage is that the flow conditions at the entry of the substance or mixture to be conveyed into the flow channel are considerably evened out compared to the single-stage ejector known from DE-A1-34 20 652.
  • a further advantage consists in the fact that the ejector according to the invention can be manufactured in spite of its multiple stages, since it can be manufactured from simple turned or joined parts that can be mass-produced, the individual Ejector rings can be reworked or replaced if necessary to optimize the ejector for the respective application.
  • the flow conditions in the flow channel can be adapted to the particular conveying task - even in the case of multi-stage ejector pumps in which a passage gap for the substance to be conveyed which forms a constriction between the suction chamber and the flow channel - as in DE-A1-34 20 652 - is missing.
  • the "blowing medium” can be both liquid and gaseous, as can the flowable substance or the flowable substance mixture.
  • “ejector rings” are preferably individual components which are independent of one another and are introduced into the pump housing, which — as will be shown below — can be done in a wide variety of ways. If the cross-sectional constriction at the passage gap for the flowable substance or the mixture of substances between the respective suction chamber and the flow channel is not too great, it is also possible to manufacture the ejector rings in one piece with the wall areas forming the suction chamber.
  • the layout of the ejector rings is preferably - but not necessarily - circular.
  • the cross section of the ejector rings can vary widely and can be adapted to the application conditions, in particular cylindrical and, particularly preferably, conical (see exemplary embodiments according to FIGS. 1 to 4).
  • the side surface of the ejector rings forming part of the wall of the flow channel can, given a radial view, receive a wide variety of contours (see exemplary embodiments according to FIGS. 5 to 9).
  • the inclination angles of the mixing zone and the diffuser zone which are related to the axial direction of the flow channel, can be different.
  • the ejector rings can also have a corrugated surface that enlarges the effective suction gap, as a result of which the flow conditions in the flow channel are influenced by local cross-sectional changes (see exemplary embodiment according to FIGS. 5 and 9). It is also advantageous to arrange flow guide profiles laterally - seen in the axial direction above the ejector rings (see exemplary embodiment according to FIG. 9), by means of which, on the one hand, eddies which arise when the substance to be conveyed is mixed with the propellant can be kept relatively low. On the other hand, the flow guide profiles make it possible to reduce the residual energy of the propellant, which increases the pump efficiency. Flow control profiles of this type have not been previously published.
  • the ejector rings can in principle be attached to the ends of the partition walls separating the suction chambers, but they are particularly advantageously connected to the said partition walls before assembly, preferably in one piece, so that the structural unit consisting of ejector ring and partition wall is installed in the pump will (claim 3).
  • a particular advantage of the invention is that the axial position of the ejector rings and thus the cross-sectional shape of the flow channel can be changed (claims 4 or 6).
  • This change in position can be done in a variety of ways, e.g. B. by means of sliding guides or screw threads, the diameter of which may correspond to the respective diameter of the ejector ring concerned.
  • adjustment devices which consist of telescoping tubes that connect to one another at the ends (flow channel side) of radial and axial or conical wall parts that act as partitions for the neighboring ones Serve suction chambers and their annular end faces themselves serve as part of the wall and the flow channel or carry the respective ejector ring.
  • the four-stage ejector identified overall by 100, has a circular cylindrical housing 26 which consists of a base part 26A with a central inlet 23 for the medium to be conveyed, a cover part 26C with a common outlet 14 for the propellant medium and the medium to be conveyed and an ejector support part 268 arranged between the cover part and the base part.
  • a dividing wall 6 is inserted into the connection point between the cover part 26C and the ejector support part 26B, the cover-side surface of which, together with the cover part 26C, delimits an outflow chamber 11.
  • a pipe socket 27 provided centrally on the partition 6 and projecting from it in the direction of the cover 26C and penetrating the cover 26 forms an inlet 13 for the propellant medium, in which an orifice 19 for pre-distributing the propellant medium over the entire inlet cross section can be installed and the a solids filter 20 can be connected upstream in order to avoid erosion phenomena in the region of the inlet nozzle 22A to be explained.
  • the partition 6 is provided in its radial outer region with circumferentially distributed bores 14A, which - also directly - can serve as an outlet and which can be followed by silencers 12 in the direction of flow.
  • a wall part 22E of a flow channel 22 On the side of the partition 6 facing away from the cover part 26C, its annular surface forms a wall part 22E of a flow channel 22.
  • a wall part is opposite the wall part 22E and axially spaced from it 22F is provided, which is formed from ejector rings 2 to 5, which are arranged concentrically to one another and at a radial spacing from one another, and a central ejector disk 1.
  • the flow channel 22 is closed radially outwards by the inner surface of a circular cylindrical wall region of the ejector support part 26B. In this way, the flow channel 22 is given an annular shape.
  • the flow channel is designed for a flow directed radially from the inside to the outside, as is the case for a single-stage ejector from DE-A1-34 20 652 is basically already known.
  • the ejector support part 26B consists of the already mentioned cylindrical and a circular disk-shaped wall part, which serves as a partition wall 26D.
  • the dividing wall 26D On the side facing the bottom part 26A, the dividing wall 26D, together with the bottom part 26A, delimits a prechamber 7 in which the medium to be conveyed flowing in via the inlet 23 is pre-distributed.
  • the ejector rings are provided with partition walls 25A, 25B, 25C and 25D (in the exemplary embodiment, the ejector rings are integrally connected to the partition walls) ), wherein the partitions in the illustrated embodiment form approximately circular cylindrical tube sections of different lengths, the length of which decreases radially outwards uniformly, so that the flow cross section of the flow channel 22 becomes increasingly larger radially outward, also in the axial direction.
  • the mixture of propellant and medium to be conveyed flowing through it has an axial flow component in addition to the radial one.
  • wall part 22E runs parallel to wall part 22F according to the dash-and-dot line in FIG. 1.
  • it is also possible to completely eliminate the axial flow component by arranging the wall part 22F along the dash-dotted line in FIG. 1 and arranging the wall part 22E parallel to it. In this case, there is a pure radial flow in the flow channel 22.
  • the centrifugal force for the propellant can also be used, which can possibly increase the efficiency of the ejector.
  • FIGS. 6 and 7 Further design options of the flow channel 22 are shown in FIGS. 6 and 7.
  • the wall part 22F is inclined downwards radially outward, so that the flow comprises an axial component.
  • the convex wall part 22E aims to use centrifugal force for the propellant.
  • the flow channel shown on the right-hand side of FIG. 6 has a conical surface which is inclined radially downwards, so that the use of centrifugal force is avoided. It is therefore easily possible to adapt the geometry of the flow channel 22 to different driving media and / or fluids to be conveyed by using different wall parts 22E.
  • the wall part 22F was partly inclined, but was made flat, a curved course, as shown in FIG. 7, can also be advantageous.
  • the ejector disc 1 and the ejector rings 1-4 have a convex, curved surface.
  • the surface of the ejector rings can also be corrugated in a manner similar to that shown in FIG. 5, so that ejector rings 1 to 4 form flow troughs 41 pointing radially outwards, which exert an aligning effect on the flow prevailing in the flow channel 22. It can also be advantageous, as shown in FIG.
  • the partition walls 25A to 25D and a base element 25E carrying the ejector disk 1 and also serving as a partition wall enclose an annular suction chamber 15 to 18 between them.
  • the partition wall 26D has openings 28 to 31 as access openings of the medium to be conveyed from the pre-chamber 7 into the suction chambers 15 to 18.
  • the openings can be distributed around the circumference and at least partially provided with non-return flaps 8 to 12.
  • the radially outer edges of the ejector disk 1 or the ejector rings 2 to 4 form with the radial inner edge of the ejector ring 2 to 5, which is located radially on the outside in each case, a passage gap 22D forming a constriction for the fluid to be conveyed from the respective suction chamber into the flow channel 22.
  • the passage gaps 22D are each ring-shaped in the illustrated and in this respect preferred exemplary embodiments. They can - at least in the exemplary embodiments according to FIGS. 1 and 2 - in principle also consist of circumferentially distributed openings.
  • the passage gaps 22D have a periodically widening and narrowing structure.
  • the annular nozzle 22A which is formed by the ejector disk 1 and the central region of the partition 6 opposite the ejector disk 1, serves as the inlet nozzle of the propellant medium in the flow channel 22.
  • the radially outer area serves as diffuser 22C and the radially inner area of the ejector ring serves as mixing zone 228.
  • the two axially opposite wall parts 22E and 22F of the flow channel 22 are constructed in an approximately mirror-symmetrical manner and are provided with suction chambers.
  • the propellant and the medium to be conveyed are discharged radially outward from the flow channel 22.
  • the ejector rings and the ejector disk are axially adjustable.
  • the partition walls 25A and 25B bearing the ejector rings have at their end opposite the ejector ring an annular wall region 25D and 25E which is supported radially on the inside by a tube 32 and 33, respectively.
  • the ejector disk 1 is also carried by a tube (tube 34) and the housing 26 has a central tube socket 35.
  • the tube 34 has a screw thread on its outer circumference, which corresponds to an internal thread provided on the tube 32.
  • the pipe 32 also has an external thread, which in turn corresponds to an internal thread of the pipe 33 and the pipe 33 carries an external thread which corresponds to an internal thread of the pipe socket 35.
  • all pipes 32, 33, 34, 36 and the pipe socket 35 and with them the ejector disk or ejector rings carried by them are telescopically rotatable in the axial direction of the pump.
  • a relative position of the ejector rings and the ejector disk is shown in the left half of the image, as it corresponds to the embodiments of Figs. 1 and 2, while in the right half of Fig. 3, the ejector rings are adjusted so that the cross section of the Flow channel 22 which widens radially outward.
  • the cross section of the flow channel and thus the throughput of fluid to be pumped and the energy consumption can be set.
  • the central ejector disk is acted upon by the drive medium via the central inlet 13, which then flows radially outward and
  • different pressures - depending on the geometry of the individual ejector rings and the rings relative to one another - are generated between the individual ejector disks, with different suction effects occurring at the passage gaps 22D.
  • ejector ring segments can also be used instead of complete ejector rings within the scope of the invention.
  • FIG. 9 shows a further embodiment of an ejector, in which — as seen in the direction of flow — flow guide profiles 37, 38, 39 are arranged in the flow channel 22 at the same height as the passage gaps 22D.
  • the flow guide profiles 37 to 39 have a symmetrical, wing-like cross section and are oriented in such a way that the round head sides point in the direction of the ejector center, ie face the inflowing fluid, the pointed tail sides point in the flow direction.
  • the flow guide profiles 37 to 39 are held on vertical partition walls 40 which subdivide the radial ejector pump into circular segments.
  • the mixture of propellant and fluid to be conveyed in the flow channel 22 is partially deflected in its direction, which on the one hand causes the vortex formation - in particular in the mixing zones 228 -, on the other hand, the residual energy of the propellant can be reduced by an improved flow.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Manipulator (AREA)
  • Reciprocating Pumps (AREA)

Claims (24)

  1. Pompe à éjecteur (100) à plusieurs étages en vue de l'aspiration et/ou de l'amenée de substances ou mélanges de substances en écoulement à l'aide d'un agent moteur fluide, avec un coffret (26), comprenant
    - au moins une entrée (27) pour l'agent moteur,
    - au moins une entrée (23) pour la substance ou le mélange de substances en écoulement,
    - au moins un canal d'écoulement (22) pour le mélange et le passage d'écoulement commun de l'agent moteur et de la substance ou du mélange de substances en écoulement avec au moins une tuyère (22A), plusieurs zones de mélange (22B) et plusieurs diffuseurs (22C),
    - au moins une chambre d'aspiration (15, 16, 17 ou 18) par étage de pompe qui est reliée en communication de fluide éventuellement par l'intermédiaire d'une antichambre commune (7), d'une part, à l'entrée (23) pour la substance en écoulement et, d'autre part, au canal d'écoulement (22), une fente de passage (22D), qui forme un point d'étranglement, étant prévue pour la substance ou le mélange de substances en écoulement en tant que connexion de communication de fluide avec le canal d'écoulement (22), et
    - au moins une sortie commune (14) pour l'agent moteur et la substance ou le mélange de substances en écoulement,
    caractérisée
    en ce que le canal d'écoulement (22) est de forme annulaire et configuré pour un écoulement dirigé radialement de l'intérieur vers l'extérieur, la paroi du canal d'écoulement étant formée essentiellement de deux parties de paroi (22E et 22F), approximativement en forme de disque ou de disque annulaire, opposées l'une à l'autre à distance axiale et
    en ce qu'au moins l'une des deux parties de paroi (22E, 22F) se compose de deux anneaux éjecteurs (2, 3, 4, 5) disposés concentriquement l'un par rapport à l'autre, formant ou présentant les fentes de passage (22D) pour la substance ou le mélange de substances en écoulement, anneaux qui séparent spatialement le canal d'écoulement (22) et les chambres d'aspiration (15 à 18).
  2. Pompe à éjecteur à plusieurs étages selon la revendication 1, caractérisée en ce que les chambres d'aspiration (15 à 18) sont de forme annulaire.
  3. Pompe à éjecteur à plusieurs étages selon la revendication 1 ou 2, caractérisée en ce que les anneaux éjecteurs (2 à 5) sont munis de cloisons (25A à 25E) en particulier coniques et/ou cylindriques, orientées suivant un angle les unes par rapport aux autres pour la séparation de chambres d'aspiration (15 à 18) voisines les unes des autres.
  4. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 3, caractérisée en ce que les anneaux éjecteurs (2 à 5) sont fixés de manière réglable dans le sens axial sur le coffret (26), respectivement par rapport à ce dernier.
  5. Pompe à éjecteur à plusieurs étages selon la revendication 4, caractérisée par des tubes (32 à 35) s'enfilant les uns dans les autres de manière télescopique en vue de la translation axiale des anneaux éjecteurs (2 à 5).
  6. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 5, caractérisée en ce que les anneaux éjecteurs (2 à 5) sont munis, d'une seule pièce, de cloisons (25A à 25E) pour la séparation de chambres d'aspiration voisines (15 à 18) les unes des autres.
  7. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 6, caractérisée en ce que la forme du contour des anneaux éjecteurs est en anneau de cercle.
  8. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 7, caractérisée en ce que les angles d'inclinaison relatifs à la direction axiale du canal d'écoulement (22) de la zone de mélange (22B) et des diffuseurs (22C) sont différents.
  9. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 8, caractérisée en ce que la surface des anneaux éjecteurs (2 à 5) présentent des moyens de changement local de la coupe transversale du canal d'écoulement (22), comme une surface ondulée.
  10. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 9, caractérisée en ce que sur le côté des anneaux éjecteurs (2 à 5) sont disposés des profilés conducteurs d'écoulement (37 à 39) présentant en particulier une coupe transversale similaire à des ailes portantes avec des bords d'attaque arrondis pointés en direction du centre de la pompe à éjecteur.
  11. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 10, caractérisée par un obturateur (19) prévu dans l'entrée (13) de l'agent moteur pour une répartition préalable de l'agent moteur sur toute la section transversale d'entrée.
  12. Pompe à éjecteur à plusieurs étages, selon l'une des revendications 1 à 11, caractérisée par des silencieux (12) montés dans le sens de l'écoulement en aval des ouvertures de sortie (14A).
  13. Pompe à éjecteur à plusieurs étages, selon l'une des revendications 1 à 12, caractérisée par une partie de support d'éjecteur, se composant d'une partie de paroi cylindrique (26B) et d'une partie de paroi (26D) en forme de disque circulaire.
  14. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 13, caractérisée en ce que la coupe transversale du canal d'écoulement (22) augmente de plus en plus vers l'extérieur également dans le sens axial.
  15. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 14, caractérisée en ce que les parties de paroi (22E et 22F) du canal d'écoulement, réciproquement opposées, ont un tracé courbé, en particulier convexe.
  16. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 15, caractérisée en ce que la géométrie du canal d'écoulement (22) est adaptable, par l'emploi de parties de paroi (22E) différentes, aux différents agents moteurs et/ou fluides à acheminer.
  17. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 16, caractérisée en ce que les faces inférieures (42), dirigées vers l'intérieur des chambres d'aspiration (15 à 18), des anneaux éjecteurs (2 à 4) respectivement du disques éjecteur (1) sont de forme concave.
  18. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 17, caractérisée en ce que les bords (43), tournés vers la fente de passage (22D), des anneaux éjecteurs (2 à 4) sont arrondis.
  19. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 18, caractérisée en ce que les fentes de passage (22D) entre les chambres d'aspiration (15 à 18) et le canal d'écoulement (22) se composent de percées réparties sur la périphérie ou présentent une structure à élargissement et à rétrécissement périodiques.
  20. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 19, caractérisée en ce que les anneaux éjecteurs (2 à 4) ainsi que le disque éjecteur (1) présentent des cavités d'écoulement (41).
  21. Pompe à éjecteur à plusieurs étages selon l'une des revendications 1 à 20, caractérisée par des segments d'anneaux éjecteurs à la place d'anneaux éjecteurs complets.
  22. Pompe à éjecteur (100) à plusieurs étages en vue de l'aspiration et/ou de l'amenée de substances ou mélanges de substances en écoulement à l'aide d'un agent moteur fluide, avec un coffret (26), comprenant
    - au moins une entrée (27) pour l'agent moteur,
    - au moins une entrée (23) pour la substance ou le mélange de substances en écoulement,
    - au moins un canal d'écoulement (22) pour le mélange et le passage d'écoulement commun de l'agent moteur et de la substance ou du mélange de substances en écoulement avec au moins une tuyère (22A), plusieurs zones de mélange (22B) et plusieurs diffuseurs (22C),
    - au moins une chambre d'aspiration (15, 16, 17 ou 18) par étage de pompe qui est reliée en communication de fluide eventuellement par l'intermédiaire d'une antichambre (7), d'une part, à l'entrée (23) pour la substance en écoulement et, d'autre part, au canal d'écoulement (22),
    - au moins une sortie commune (14) pour l'agent moteur et la substance ou le mélange de substances en écoulement,
    caractérisée
    en ce que le canal d'écoulement (22) est de forme annulaire pour un écoulement dirigé radialement de l'intérieur vers l'extérieur, les parois du canal d'écoulement étant formées essentiellement de deux parties de paroi (22E et 22F), approximativement en forme de disque ou de disque annulaire, opposées l'une à l'autre à distance axiale et
    en ce que les secteurs de paroi du canal d'écoulement (22), présentant la zone de mélange (22B) et le diffuseur (22C) d'un ou de plusieurs étages de pompe, sont réglables axialement par rapport aux autres secteurs de paroi du canal d'écoulement (22).
  23. Pompe à éjecteur à plusieurs étages selon la revendication 22, caractérisée en ce que les chambres d'aspiration sont de forme annulaire.
  24. Pompe à éjecteur à plusieurs étages selon la revendication 22 ou 23, caractérisée par des tubes s'enfilant les uns dans les autre de manière télescopique en vue de la translation axiale des différentes zones de paroi du canal d'écoulement (22).
EP93917751A 1992-08-06 1993-08-05 Pompe a ejecteur a plusieurs etages Expired - Lifetime EP0654125B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9210496U 1992-08-06
DE9210496U DE9210496U1 (de) 1992-08-06 1992-08-06 Mehrstufige Ejektorpumpe
PCT/EP1993/002085 WO1994003733A1 (fr) 1992-08-06 1993-08-05 Pompe a ejecteur a plusieurs etages

Publications (2)

Publication Number Publication Date
EP0654125A1 EP0654125A1 (fr) 1995-05-24
EP0654125B1 true EP0654125B1 (fr) 1997-06-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93917751A Expired - Lifetime EP0654125B1 (fr) 1992-08-06 1993-08-05 Pompe a ejecteur a plusieurs etages

Country Status (6)

Country Link
US (1) US5584668A (fr)
EP (1) EP0654125B1 (fr)
JP (1) JP2913117B2 (fr)
AT (1) ATE154669T1 (fr)
DE (2) DE9210496U1 (fr)
WO (1) WO1994003733A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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Publication number Priority date Publication date Assignee Title
WO2013153096A1 (fr) 2012-04-10 2013-10-17 J. Schmalz Gmbh Générateur de vide pneumatique équipé de buses d'éjection et de buses de réception
DE212013000051U1 (de) 2012-04-10 2014-09-11 J. Schmalz Gmbh Pneumatischer Vakuumerzeuger mit Treibdüse und Empfängerdüse

Also Published As

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US5584668A (en) 1996-12-17
DE59306796D1 (de) 1997-07-24
EP0654125A1 (fr) 1995-05-24
JP2913117B2 (ja) 1999-06-28
DE9210496U1 (de) 1993-12-02
JPH08502110A (ja) 1996-03-05
ATE154669T1 (de) 1997-07-15
WO1994003733A1 (fr) 1994-02-17

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