EP2643596B1 - Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet - Google Patents

Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet Download PDF

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Publication number
EP2643596B1
EP2643596B1 EP11799082.0A EP11799082A EP2643596B1 EP 2643596 B1 EP2643596 B1 EP 2643596B1 EP 11799082 A EP11799082 A EP 11799082A EP 2643596 B1 EP2643596 B1 EP 2643596B1
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EP
European Patent Office
Prior art keywords
screw
centrifugal wheel
type centrifugal
cover plate
pump
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.)
Active
Application number
EP11799082.0A
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German (de)
English (en)
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EP2643596A1 (fr
Inventor
Carl STÄHLE
Robles Ciro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frideco AG
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Frideco AG
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Publication date
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Priority to EP11799082.0A priority Critical patent/EP2643596B1/fr
Publication of EP2643596A1 publication Critical patent/EP2643596A1/fr
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Publication of EP2643596B1 publication Critical patent/EP2643596B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/15—Two-dimensional spiral

Definitions

  • the invention relates to a fferenzentrifugalradpumpe comprising a cover plate and a method for cleaning a fferenzentrifugalradpumpe comprising such a cover plate.
  • the document CH 662 864 discloses a fferenzentrifugalradpumpe, wherein the fferenzentrifugalrad is rotatably mounted on a rotational axis.
  • the fferenzentrifugalradpumpe has in the region of the connection between ringenzentrifugalrad and axis of rotation on a cavity.
  • This per se very well-proven embodiment of a screw centrifugal pump has the disadvantage that can deposit and accumulate impurities within the cavity. This results in increased wear and / or increased maintenance.
  • the document EP1041320 discloses a centrifugal pump with a secondary flow behind the impeller for the purpose of cooling a shaft seal.
  • a screw centrifugal wheel pump comprising a cover plate, wherein the cover plate has a front side and a rear side, and wherein the front side has a preferably frusto-conical extending part surface whose course is adapted to the back of a fferenzentrifugalrades adapted, the partial surface in the center of a central opening wherein the central opening extends in the direction of an axis, and wherein the cover plate has at least one opening which in the region of the partial surface and spaced from the central opening is arranged, and wherein the aperture forms a fluid-conducting connection between the front and the back of the cover plate.
  • a fferzentrifugalradpumpe having the inventive cover plate has the advantage that forms during the pumping operation, a partial flow, which flows from the front to the back of the cover plate and then along a center opening of the cover plate flows back to the front of the cover plate, so that forms a cleaning stream, the is able to at least partially back into the cavity behind the cover plate or accumulated impurities to promote the front of the cover plate, so that these impurities can be conveyed away via the main flow of fferenzentrifugalradpumpe.
  • the screw centrifugal pump comprises a rotatably mounted screw centrifugal wheel and a cover plate arranged directly next to the screw centrifugal wheel with a central opening, wherein a hub or a drive shaft of the screw centrifugal wheel preferably extends through the central opening. Between the center opening and the hub or the drive shaft, a fluid-conducting gap is formed.
  • Rotating the helical centrifugal wheel in the direction of rotation causes a fluid to be conveyed along a main flow, causing a partial flow of the fluid to flow to the rear of the cover plate via an aperture spaced from the center opening, and thereafter, passing this partial flow across the fluid conducting gap flows back to the main stream, due to the between the aperture and the fluid conducting gap prevailing pressure difference.
  • This partial flow forms a purifying fluid flow, which in particular flows through the rear space of the cover plate and supplies any impurities present therein to the skin flow.
  • the cover plate preferably runs on the side facing the screw centrifugal wheel or the partial surface facing the screw centrifugal wheel, so that the partial surface is preferably frusto-conical or planar, wherein the partial surface could also have a different shape, for example a curved or polygonal course.
  • FIG. 1 shows a known from the prior art, in the document CH 662 864 disclosed embodiment of a synchronenzentrifugalradpumpe.
  • FIG. 1 shows an axial section through the sortedenzentrifugalradpumpe comprising a fferenzentrifugalrad with a hub 21 and a Schaufelzentrifugalrad 25, comprising a drive shaft 33 which is fixedly connected to the hub 21, and comprising a disposed behind the SSenzentrifugalrad 25 housing rear wall 23, and the SSenzentrifugalrad 25 in the circumferential direction surrounding housing outer wall 3.
  • an outlet opening 36 is provided in the vicinity of the drive shaft 33, so that gases can escape, which entrained in the pumped medium and exit against the Laufradrotations scholar and pass through the impeller rear gap between the impeller hub 21 and rear wall 23 in the interior 37.
  • the gap between the impeller hub 21 and the housing rear wall 23 is formed as a labyrinth, wherein both the hub-side and the rear wall-side labyrinth structure is interrupted by a transverse groove 38, so that a self-cleaning effect and no conveyed solids in the interior 37 and the outlet opening 36th reach.
  • FIG. 2 1 shows a pump housing 3 with inlet opening 3a or pump inlet opening 3a, outlet 3b and housing interior 3c, and further comprising a hub 21, which is connected to a vane centrifugal wheel 25 shown only schematically and dashed is, and which is rotatably mounted about a rotatable about an axis A drive shaft 33.
  • the connection between the drive shaft 33 and the hub 21 is shown only schematically.
  • the Schaufelzentrifugalrad 25 and the hub 21 could also, as in FIG. 1 represented as a single, shared part be designed.
  • the fferenzentrifugalradpumpe 1 also comprises a conical inner housing 4 with inlet opening 4a and a Abstandhaltering 5.
  • the fferenzentrifugalradpumpe 1 also comprises a housing rear wall 23 with an outlet opening 36 and a seal 6.
  • the outlet opening 36 is used for maintenance purposes and is usually closed during operation of the screw centrifugal pump 1 with a plug from the outside.
  • a main flow F is generated which leads to the outlet 3b via the inlet opening 3a.
  • the conveyed mainstream F comprises a fluid, preferably water and possibly gases such as water vapor
  • the helical centrifugal pump 1 is used in a preferred use for conveying polluted water, so that the main flow F may also include solids, such as feces, sand, gravel, textiles, Fibers, plastic parts etc.
  • the fferenzentrifugalradpumpe 1 also includes a cover plate 2, which is arranged in the direction of the axis A directly behind the hub 21 and the sortedenzentrifugalrades 25.
  • the cover plate 2 has a front side 2h and a rear side 2i, wherein the front side 2h in the illustrated embodiment comprises a substantially frusto-conical extending part surface 2k whose course of the back is adapted to a fferenzentrifugalrad 25, wherein the partial surface 2k in the center of a center opening 2g wherein the center opening 2g extends parallel in the direction of the axis A.
  • the hub 21 extends through the central opening 2g, so that between the center opening 2g and the hub 21, a gap 2b extending in the direction of the axis A is formed.
  • the hub 21 also has a projection which partially covers the partial surface 2k, so that a gap 2e extending transversely with respect to the axis A is formed between the hub 21 and the partial surface 2k.
  • the Cover plate 2 has at least one opening 2a, which is arranged at a distance from center part 2g in the area of partial surface 2k, wherein opening 2a forms a fluid-conducting connection between front side 2h and rear side 2i of cover plate 2.
  • the fluid in the region of the opening 2a has a higher pressure than in the region of the center opening 2g, whereby a partial flow F1 is generated by a part of the main flow F as part of flow F1 flows through the opening 2a to the back 2i of the cover plate 2, and then flows through the gap 2b and optionally the column 2e back into the main flow F.
  • This partial flow F1 causes contaminants, which are located in the interior 37, are conveyed out of this and the main stream F are supplied.
  • the hub 21 could also be designed without a projection, so that no transverse gap 2e is formed.
  • the hub 21 could also be spaced with respect to the sub-surface 2k such that no transverse gap 2e is formed.
  • the drive shaft 33 could also be further advanced, so that the gap 2 b is formed at least partially or exclusively between the cover plate 2 and the drive shaft 33.
  • the cover plate 2 has a front side 2h directed towards the pump inlet opening 3a, and the front side 2h preferably has a partial surface 2k whose course is adapted to the rear side 25a of the screw centrifugal wheel 25 such that between the front side 2h of the cover plate 2 and the back side 25a of the Screw centrifugal wheel 25 a gap 2e is formed by a maximum of up to 3 mm, preferably a gap 2e in the range between 0.5 mm and 2 mm.
  • the cover plate 2 has at least one opening 2a and preferably at least two openings 2a.
  • the openings 2a are arranged symmetrically with respect to the axis A in the partial surface 2k.
  • the openings 2a can be configured in a variety of ways. In the FIG. 2 shown below opening 2a is in FIG. 3 shown enlarged.
  • the opening 2 comprises an inlet opening 21 whose cross-section forms an entry surface 2m.
  • the partial flow F1 flows through the opening 2a to the rear 2i of the cover plate 2.
  • the partial flow F1 is deflected when flowing into the opening 2a, which has the advantage that in the flow F2 located solids difficult to flow into the opening 2a.
  • the partial flow F1 is thereby at least partially cleaned of solids because the solids remain at least partially in the flow F2 and be carried away by this.
  • FIG. 4 shows a further embodiment of an opening 2a.
  • the embodiment shown in FIG. 4 represented opening 2a arranged such that the partial flow F1 is deflected with respect to the occurring at the front side 2h of the cover plate 2 flow F2 such that it undergoes a partial flow reversal.
  • the aperture 2a extending in this way has the advantage that solids can pass through the aperture 2a to the back 2i of the cover plate 2 less effectively.
  • FIG. 2 The opening 2a shown above is in FIG. 5 shown enlarged.
  • a recess 2c is arranged, which opens to the opening 2a, wherein the opening 2a forms an inlet opening 21 with inlet surface 2m, so that the inlet opening 21 is arranged in the recess 2c.
  • the inlet opening 21 or the inlet surface 2m can be arranged in various ways, but advantageously as in FIG. 5 represented such that the partial flow F1 is deflected and undergoes an at least partial flow reversal with respect to the occurring at the front 2h of the cover plate 2 flow F2.
  • the inlet opening 21 arranged in this way has the advantage that solids can pass through the opening 2a to the back 2i of the cover plate 2 less effectively.
  • the entrance surface 2m is arranged in an advantageous embodiment such that it is parallel or substantially parallel to the axis A. In FIG. 5 is not the axis A per se, but the course of the axis A is shown.
  • the entrance surface 2m is arranged in a further advantageous embodiment such that it is perpendicular or substantially perpendicular to the rotational direction R of the drive shaft 33, wherein the entrance surface 2m facing away from the rotation direction R is arranged.
  • FIGS. 6, 7 and 8th show an embodiment of a cover plate 2 in plan view, in perspective view and in a section along the section line BB.
  • the recess 2c as in the FIGS. 6 and 7 represented, at least partially by a substantially perpendicular or perpendicular to the axis A extending bore be educated.
  • FIG. 6 shows the course of the axis A and the preferred direction of rotation R. Off FIG. 6 is thus seen that the entrance surface 2m is parallel to the axis A and perpendicular to the direction of rotation R.
  • FIG. 8 shows in section the cover plate 2 with front 2h, back 2i and center opening 2g.
  • the openings 2a are arranged, wherein the openings 2a are always arranged at a distance from the central opening 2g.
  • the openings 2a could also, as in FIG. 3 shown, perpendicular or substantially perpendicular with respect to the partial surface 2k run, or as in FIG. 4 shown, transverse to the part surface 2k run.
  • the cover plate 2 as in the FIGS. 6 to 8 illustrated, a recess extending in the circumferential direction, in particular a spiral-shaped recess 2d, which advantageously extends in the region of the central opening 2g along the partial surface 2h to the outside.
  • the depression 2d extends as in FIG FIG. 6 shown in the direction of rotation R spiral from inside to outside.
  • This embodiment has the advantage that a contamination, which is conveyed by means of the partial flow F1 via the central opening 2g or the gap 2b to the front side 2h of the cover plate 2, is conveyed along the recess 2d towards the periphery of the partial surface 2k.
  • the hub 21 rotating in the direction of rotation R over the part surface 2k or the screw centrifugal wheel 25 rotating in the direction of rotation R helps to move the dirt in the direction of rotation R in the depression 2d or on the part surface 2k and to move it towards the outside with respect to the part surface 2k pollution reaches the skin stream F, and is detected by this and carried away.
  • an arrangement of the aperture 2a is particularly advantageous as in the FIGS. 6 to 8 shown.
  • the contamination is moved substantially in the direction of rotation R, wherein the aperture 2a is arranged in a recess 2c and the inlet surface 2m facing away from the direction of rotation R is aligned so that dirt, even if they flow over the recess 2c, due to Flow conditions and the direction of movement of the contaminants hardly or not at all flow through the opening 2a but the main stream F are supplied.
  • the cover plate 2 can, as in the FIGS. 7 and 8th shown, in addition, a running along the edge region recesses 2f, which is provided in particular for receiving an O-ring and thus for sealing.
  • FIG. 9 shows in a section of another example of a cover plate 2, which in contrast to the in FIG. 8 However, shown section has a flat part surface 2k. Otherwise, the cover plate 2 is configured similar to the in FIG. 8 illustrated embodiment by the cover plate 2 according to FIG. 9 also has a recess 2c, which opens into an opening 2a. If the spiraling depression 2d is thought away, discloses FIG. 6 a top view of the in FIG. 9 shown cover plate 2. The in FIG. 9 However, shown cover plate 2 could also have a spiral extending recess 2d, so that a plan view of this embodiment as in FIG. 6 would look like. In the FIG. 9 shown cover plate 2 also has a central opening 2g and a front side 2h and a back 2i.
  • the front side 2h or the partial surface 2k can run in a variety of ways, such as curved, as in FIG. 10 shown schematically in a section, or edged, as in FIG. 11 shown schematically in a section.
  • the sub-surface is as shown in FIG FIG. 8 shown, frustoconical.
  • the cover plate 2 is designed as a casting, wherein the recess 2c and advantageously also the opening 2a or the inlet opening 21 already form part of the still unprocessed casting.
  • the cover plate 2 it is then still essentially necessary to machine the front side 2h, in particular by removing machining machining.
  • a cover plate 2 made of a casting designed in this way has the advantage that there are no or only very small additional costs during production, since the chip-removing machining of the cover plate 2 is required anyway.
  • the inventive method allows self-cleaning a fferenzentrifugalradpumpe 1.
  • the fferenzentrifugalradpumpe 1 has a rotatably mounted SSenzentrifugalrad 25 and an immediately adjacent or behind the SSenzentrifugalrad 25 arranged Cover plate 2 with a central opening 2g, wherein a hub 21 of the fferenzentrifugalrades 25 or the SSenzentrifugalrad 15 superposed axis 33 extends through the central opening 2g, so that between the central opening 2g and the hub 21 or the axis 33, a fluid-conducting gap 2b is formed.
  • the cover plate 2 on the front side 2h on the part surface 2k has a spiral recess 2d, wherein the spiral recess 2d in the direction of rotation R from inside extends to the outside, so that the outgoing from the gap 2b partial flow F1 and the optionally contained therein impurities via the spiral-shaped depression 2d the main flow F is supplied.
  • cover plate 2 and the housing rear wall 23 are always shown as separate parts.
  • the cover plate 2 and the housing rear wall 23 could also be designed in one piece, for example by being made of a single part, for example a cast part.
  • Such a single casting, comprising both the cover plate 2 and the housing rear wall 23, has the advantage that this is inexpensive to produce, and that between the cover plate 2 and the rear wall 23 no seal is required. This allows a particularly low-maintenance embodiment.
  • FIG. 12 shows in a plan view another embodiment of the already in FIG. 6
  • the opening 2a and the entrance surface 2m again runs parallel to the axis A, wherein the opening 2a or the inlet surface 2m, in contrast to FIG. 6 , with respect to a radially extending through the axis A extending straight line L inclined at an angle ⁇ , wherein the angle ⁇ preferably has a value in the range of +/- 60 degrees.
  • the cover plate 2 could also consist of a metal sheet.

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Claims (13)

  1. Pompe à roue centrifugale hélicale (1), comprenant un boîtier de pompe (3) avec une aperture pompe à admission (3a), comprenant une roue centrifugale hélicale (25) avec un moyeu (21) et/ou un arbre d'entraînement (33), et comprenant une plaque de recouvrement (2) pour la pompe à roue centrifugale hélicale (1), la plaque de recouvrement (2) comprenant un côté avant (2h) et un côté derrière (2i), et le côté avant (2h) comportant une surface partielle (2k), le parcours de laquelle est implémenté adapté au côté derrière (2i) d'une roue centrifugale hélicale (25), la surface partielle (2k) comprenant dans son centre une aperture centrale (2g), l'aperture centrale (2g) étant implémentée adaptée pour un passage d'un axe rotatif (A) de la roue centrifugale hélicale (25) et s'étendant en direction de l'axe rotatif (A),
    et la surface partielle (2h) comportant une enfonçure (d) s'étendant en spirale, laquelle, commençant substantiellement dans une région de l'aperture centrale (2g), s'étend le long de la surface partielle (2h) en direction rotative (R) vers l'extérieur, la plaque de recouvrement (2) étant disposée à un côté (25a) de la roue centrifugale hélicale (25), lequel est situé vis-à-vis de l'aperture pompe à admission (3a), directement derrière la roue centrifugale hélicale (25),
    caractérisée en ce qu'
    une fente (2b) est formée entre l'aperture centrale (2g) de la plaque de recouvrement (2) et le moyeu (21) et/ou l'arbre d'entraînement (33), que la plaque de recouvrement (2) comporte au moins une percée (2a) disposée dans la région de la surface partielle (2k) et espacée par rapport à l'aperture centrale (2g), et que la percée (2a) forme une connexion convoyant de fluide entre le côté avant (2h) et le côté derrière (2i) de la plaque de recouvrement (2).
  2. Pompe à roue centrifugale hélicale (1) selon la revendication 1, caractérisée en ce que la surface partielle (2k) s'étend substantiellement en forme de cône tronqué ou substantiellement en forme planaire.
  3. Pompe à roue centrifugale hélicale (1) selon la revendication 1, caractérisée en ce que la plaque de recouvrement (2) comporte au moins deux percées (2a), les au moins deux percées (2a) étant disposées en particulier symétriquement par rapport à l'axe rotatif (A).
  4. Pompe à roue centrifugale hélicale (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la percée (2a) comporte vers le côté avant (2h) une aperture d'entrée (2l), que le côté avant (2h) comporte une enfonçure (2c) et que l'aperture d'entrée (2l) est disposée dans ladite enfonçure (2c).
  5. Pompe à roue centrifugale hélicale (1) selon la revendication 4, caractérisée en ce que l'aperture d'entrée (2l) forme une surface d'entrée (2m) s'étendant substantiellement en parallèle à l'axe rotatif (A).
  6. Pompe à roue centrifugale hélicale (1) selon la revendication 4 ou 5, caractérisée en ce que l'enfonçure (2c) est implémentée au moins partiellement par un alésage, lequel s'étend substantiellement perpendiculairement à l'axe rotatif (A).
  7. Pompe à roue centrifugale hélicale (1) selon la revendication 4 ou 5, caractérisée en ce que la plaque de recouvrement (2) consiste en une pièce coulée et que l'enfonçure (2c), et avantageusement l'aperture d'entrée (2l) aussi, forme déjà part de la pièce coulée non traitée.
  8. Pompe à roue centrifugale hélicale (1) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la percée (2a) s'étend perpendiculairement ou substantiellement perpendiculairement par rapport à la surface partielle (2k).
  9. Pompe à roue centrifugale hélicale (1) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la percée (2a) s'étend transversalement par rapport à la surface partielle (2h).
  10. Pompe à roue centrifugale hélicale (1) selon l'une quelconque des revendications précédentes en combination avec une des revendications 4 à 7, caractérisée en ce que la roue centrifugale hélicale (25) comporte une direction rotative (R) et que la surface d'entrée (2m) formée par l'aperture d'entrée (2l) de la percée (2a) s'étend substantiellement de façon parallèle à l'axe rotatif (A) et détournée de la direction rotative (R).
  11. Pompe à roue centrifugale hélicale (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'enfonçure s'étendant en spirale (2d) s'étend en direction rotative (R) de l'intérieur vers l'extérieur.
  12. Procédé pour l'autoépuration d'une pompe à roue centrifugale hélicale (1) comprenant une roue centrifugale hélicale (25), laquelle est supportée rotativement, aussi qu'une plaque de recouvrement (2), laquelle est disposée directement à côté de la roue centrifugale hélicale (20) et comporte une aperture centrale (2g), un moyeu (21) ou un arbre d'entraînement (33) de la roue centrifugale hélicale (25) s'étendant par l'aperture centrale (2g), la plaque de recouvrement (2) comprenant à son côté avant (2h) une enfonçure s'étendant en spirale (2d), l'enfonçure s'étendant en spirale (2d) s'étendant en direction rotative (R) de l'intérieur à l'extérieur, la roue centrifugale hélicale (25) étant tournée en direction rotative (R) et ainsi un fluide étant convoyé le long d'un flux principal (F),
    caractérisé en ce qu'
    une fente (2b) convoyant de fluide soit implémentée entre l'aperture centrale (2g) et le moyeu (21) ou l'arbre d'entraînement (33),
    que par une percée (2a), laquelle est espacée par rapport à l'aperture centrale (2g), un flux partiel (F1) du fluide s'écoule vers le côté derrière (2i) de la plaque de recouvrement (2) et que puis ledit flux partiel (F1) s'écoule vers le flux principal (F) via la fente (2b), dû à l'écart de pression ayant lieu entre la percée (2a) et la fente (2b), de sorte que le flux partiel (F1) sortant de la fente (2b) soit convoyé au flux principal (F) via l'enfonçure s'étendant en spirale (2d).
  13. Procédé selon la revendication 12, caractérisé en ce que le flux partiel (F1) est défléchi en s'écoulant dans la percée (2a) pour ainsi séparer des matières solides du flux partiel (F1).
EP11799082.0A 2010-11-24 2011-11-24 Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet Active EP2643596B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11799082.0A EP2643596B1 (fr) 2010-11-24 2011-11-24 Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10192467A EP2458225A1 (fr) 2010-11-24 2010-11-24 Plaque de recouvrement pour une pompe de roue centrifuge à vis et pompe de roue centrifuge à vis comprenant une telle plaque de recouvrement
PCT/EP2011/070996 WO2012069619A1 (fr) 2010-11-24 2011-11-24 Plaque de fermeture autonettoyante dans une pompe à écoulement radial
EP11799082.0A EP2643596B1 (fr) 2010-11-24 2011-11-24 Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet

Publications (2)

Publication Number Publication Date
EP2643596A1 EP2643596A1 (fr) 2013-10-02
EP2643596B1 true EP2643596B1 (fr) 2017-07-12

Family

ID=43828365

Family Applications (4)

Application Number Title Priority Date Filing Date
EP10192467A Withdrawn EP2458225A1 (fr) 2010-11-24 2010-11-24 Plaque de recouvrement pour une pompe de roue centrifuge à vis et pompe de roue centrifuge à vis comprenant une telle plaque de recouvrement
EP11799082.0A Active EP2643596B1 (fr) 2010-11-24 2011-11-24 Pompe auto-nettoyante à rouet centrifuge hélicoïdal avec écoulement auxiliaire de rinçage derrière le rouet
EP17152843.3A Active EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
EP11796936.0A Active EP2643595B1 (fr) 2010-11-24 2011-11-24 Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10192467A Withdrawn EP2458225A1 (fr) 2010-11-24 2010-11-24 Plaque de recouvrement pour une pompe de roue centrifuge à vis et pompe de roue centrifuge à vis comprenant une telle plaque de recouvrement

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP17152843.3A Active EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
EP11796936.0A Active EP2643595B1 (fr) 2010-11-24 2011-11-24 Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes

Country Status (7)

Country Link
US (2) US9879695B2 (fr)
EP (4) EP2458225A1 (fr)
JP (2) JP5988106B2 (fr)
CN (2) CN103339386B (fr)
DK (3) DK2643596T3 (fr)
RU (2) RU2566865C2 (fr)
WO (2) WO2012069618A1 (fr)

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US9719515B2 (en) * 2013-01-11 2017-08-01 Liberty Pumps, Inc. Liquid pump
IL233615A (en) * 2014-07-10 2016-02-29 Ettem Eng S A Ltd Method and devices for discharging pollutants from a sealing chamber
CN104131980B (zh) * 2014-08-14 2017-01-25 杨付许 滚筒式泥浆刷墙机及其泥浆泵
PL3303844T3 (pl) * 2015-06-03 2020-03-31 Gea Tuchenhagen Gmbh Wirnik dla pompy wirowej i pompa wirowa
RU170010U1 (ru) * 2016-09-28 2017-04-11 Валентина Ильинична Жушман Оседиагональный шнековый насос
US11965526B2 (en) 2017-10-12 2024-04-23 Weir Minerals Australia Ltd. Inlet component for a slurry pump
CN112941827B (zh) * 2019-11-26 2022-12-09 青岛海尔洗衣机有限公司 具有自清洁装置的波轮洗衣机
DE102024125140A1 (de) 2024-09-03 2026-03-05 KSB SE & Co. KGaA Kreiselpumpenanordnung

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Also Published As

Publication number Publication date
EP2458225A1 (fr) 2012-05-30
CN103339386A (zh) 2013-10-02
US20130243634A1 (en) 2013-09-19
JP2014502328A (ja) 2014-01-30
JP6028162B2 (ja) 2016-11-16
US20130243568A1 (en) 2013-09-19
US9709071B2 (en) 2017-07-18
DK3179112T3 (da) 2020-10-12
DK2643595T3 (en) 2017-09-18
EP3179112B1 (fr) 2020-08-05
EP2643596A1 (fr) 2013-10-02
WO2012069619A1 (fr) 2012-05-31
RU2013128547A (ru) 2014-12-27
US9879695B2 (en) 2018-01-30
CN103299085B (zh) 2016-11-16
EP2643595B1 (fr) 2017-05-24
RU2566865C2 (ru) 2015-10-27
RU2013128532A (ru) 2014-12-27
CN103339386B (zh) 2017-03-29
EP2643595A1 (fr) 2013-10-02
DK2643596T3 (en) 2017-10-30
JP5988106B2 (ja) 2016-09-07
JP2014500930A (ja) 2014-01-16
WO2012069618A1 (fr) 2012-05-31
EP3179112A1 (fr) 2017-06-14
RU2559958C2 (ru) 2015-08-20
CN103299085A (zh) 2013-09-11

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