EP2643595B1 - Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes - Google Patents

Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes Download PDF

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Publication number
EP2643595B1
EP2643595B1 EP11796936.0A EP11796936A EP2643595B1 EP 2643595 B1 EP2643595 B1 EP 2643595B1 EP 11796936 A EP11796936 A EP 11796936A EP 2643595 B1 EP2643595 B1 EP 2643595B1
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EP
European Patent Office
Prior art keywords
screw
centrifugal wheel
type centrifugal
cover plate
hole
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
EP11796936.0A
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German (de)
English (en)
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EP2643595A1 (fr
Inventor
Robles Ciro
Carl STÄHLE
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
Original Assignee
Frideco AG
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Filing date
Publication date
Application filed by Frideco AG filed Critical Frideco AG
Priority to DK17152843.3T priority Critical patent/DK3179112T3/da
Priority to EP17152843.3A priority patent/EP3179112B1/fr
Priority to EP11796936.0A priority patent/EP2643595B1/fr
Publication of EP2643595A1 publication Critical patent/EP2643595A1/fr
Application granted granted Critical
Publication of EP2643595B1 publication Critical patent/EP2643595B1/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 synchronenzentrifugalradpumpe and a method for operating a synchronenzentrifugalradpumpe.
  • 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.
  • EP 1 041 320 A a centrifuge pump with a recirculation behind the fan wheel
  • a screw centrifugal wheel pump comprising a pump housing with a pump inlet opening and a pump inlet arranged opposite housing rear wall comprising a rotatably disposed within the pump housing fferenzentrifugalrad with a hub and a blade, and comprising a rotatable drive shaft which is connected to the fferenzentrifugalrad, and comprising a cover plate which is arranged between the fferenzentrifugalrad and the housing rear wall, wherein the cover plate has a central opening through which the hub or the drive shaft wherein an inner space is formed between the cover plate and the rear wall of the housing, wherein the cover plate has a front side oriented towards the pump inlet opening, and wherein the front side has a partial surface whose profile is adapted to the rear side of the screw centrifugal wheel such that between the front side of the cover plate and the back of the fferenzentrifugalrades a gap of up to 3 mm is formed, wherein between the center opening of the cover plate
  • the screw centrifugal wheel pump according to the invention and the method according to the invention have the advantage that during the pumping operation a partial flow is formed, which flows from the front side to the rear side of the cover plate and then flows along a center opening of the cover plate back to the front side of the cover plate, so that a cleaning stream is formed, which is possibly located in the cavity behind the cover plate or at least partially recycle accumulated impurities to the front of the cover plate, so that these impurities can be conveyed away via the main flow of the 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 again to the main flow, due to the prevailing between the aperture and the fluid gap gap 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 extends on the side facing the screw centrifugal wheel or the partial surface facing the screw centrifugal wheel in accordance with the course of the rear side of the screw centrifugal wheel, so that the partial surface preferably frusto-conical or even, wherein the partial surface could also have a different shape, for example, a curved or polygonal course.
  • the object is further achieved in particular with a method for self-cleaning a fferenzentrifugalradpumpe comprising a rotatably mounted SSenzentrifugalrad and arranged to form a gap on the back of fferenzentrifugalrades cover plate having a central opening, wherein the cover plate has an opening which is spaced with respect to the center opening, wherein a hub or a drive shaft of the fferenzentrifugalrades passes through the central opening, so that forms a fluid-conducting gap between the center opening and the hub or the drive shaft, wherein the fferenzentrifugalrad and the arrangement of the aperture are configured so adapted to each other that the back of the fferenzentrifugalrades the opening during rotation of the fferenzentrifugalrades seen in the axial direction is not covered or only during a partial angle ⁇ is covered, wherein the fferenzentr Ifugalrad is rotated in the direction of rotation and thereby a fluid is conveyed along a main
  • a cover plate for a screw centrifugal pump wherein the cover plate has a front side and a rear side, and wherein the cover plate has a central opening in the center thereof, wherein the center opening adapted to pass through a rotational axis of the fferenzentrifugalrades and extends in the direction of the axis of rotation, and wherein the cover plate has at least one aperture which is spaced from the center opening, and wherein the aperture forms a fluid-conducting connection between the front and the back of the cover plate, and wherein the opening has an inlet opening to the front, and wherein the front side has a recess, wherein the inlet opening is arranged in this recess, and wherein the inlet opening forms an inlet surface which is substantially parallel to the axis of rotation A.
  • 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 1 comprising a fferenzentrifugalrad 20 with a hub 21 and a blade 25, comprising a drive shaft 33 which is fixedly connected to the hub 21, and comprising a housing rear wall 23 arranged behind the SSenzentrifugalrad 20, and a fferenzentrifugalrad 20 circumferentially surrounding housing outer wall 3.
  • a Outlet opening 36 is provided so that gases can escape, which are carried in the fluid and excrete against the Laufradrotations scholar and pass through the impeller back 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.
  • contaminants can enter the interior 37, whereby these contaminants can deposit in the interior 37 and accumulate, so that cleaning of the screw centrifugal pump is required at certain time intervals.
  • FIG. 1a shows a side view of in FIG. 1 shown centrifugal centrifugal pump 1 at away broken outer housing.
  • FIG. 1b shows a plan view of an embodiment of a fferenzentrifugalrades 20, which is not in the document so CH 662864 is disclosed, which, however, for those in the Figures 1 and 1a illustrated centrifugal centrifugal pump 1 would be suitable, therefore the Figures 1, 1a and 1b be declared together.
  • the fferenzentrifugalrad 20 of the bobenzentrifugalradpumpe 1 comprises a hub 21 with a crescent-shaped base member 30 to which a blade 25 is connected, wherein an axis 33, the pressure-side, designed as a truncated housing wall 23 penetrates and is connected to the hub 21.
  • the housing wall 23 having a cone angle ⁇ between 5 ° and 70 ° is swept over by the end edge 28 of the pressure-side blade edge 27 with a small clearance 24.
  • the blade 25 also includes a suction side flank 39.
  • the crescent-shaped base portion 30 extends from the blade exit tip 35 into which the end edge 26 terminates, helically over a relatively long distance about the pump axis, to a point 31 at which Hub 21 has a relatively small radius R2.
  • the hub 21 has the largest radius R1.
  • a relatively large area of the housing wall 23 is exposed over a relatively large arc ⁇ , which is expediently approximately 120 °, between the blade outlet tip 35 and the aforementioned hub point 31.
  • the exposure of the housing wall 23 by reducing the wheel hub radius R1 can go as far as allow the material parameters to ensure the screw centrifugal 20 still a sufficient strength.
  • 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 comprises a hub 21, which is connected to a blade 25 shown only diagrammatically and dashed is and a Schaufelzentrifugalrad 20th forms, 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 bucket 25 and the hub 21 are preferably as in FIG. 1a and 1b represented as a single, common part or as Schaufelzentrifugalrad 20 designed.
  • the ringenzentrifugalradpumpe 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 for maintenance purposes and is during operation of the fferenzentrifugalradpumpe 1 usually closed 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 screw centrifugal pump 1 also comprises a cover plate 2, which is arranged in the direction of the axis A directly behind the hub 21 and the SSenzentrifugalrades 20.
  • the cover plate 2 has a front side 2h and a rear side 2i, wherein the front side 2h comprises a partial surface 2k whose course is adapted to the rear side 25a of the screw centrifugal wheel 20 such that between the front side 2h of the cover plate 2 and the rear side 25a of the screw centrifugal wheel 20, a gap 24 is formed of a maximum of up to 3 mm.
  • the gap 24 has a width in the range between 0.5 mm and 2 mm.
  • the gap 24 is designed to be so narrow that solids, for example fabrics that occur in sewage, such as women's stockings, can not penetrate into the gap 24 or can even wrap around the hub.
  • the narrow gap 24 also produces a shearing action on solids located within the gap 24, so that they are mechanically comminuted and conveyed to the main flow F out.
  • at least one of the surfaces directed towards the gap 24 is structured, rough or designed, for example, with protruding teeth, in order to improve mechanical comminution of solids present in the gap 24.
  • a gap 24 wider than 3mm, for example 5mm or wider, would have several disadvantages. On the one hand, due to the wide gap 24, the mechanical comminution of solids would no longer be guaranteed.
  • the front side 2h in the illustrated embodiment comprises a substantially frusto-conical extending part surface 2k, the course of the rear side is adapted to a fferenzentrifugalrad 20, wherein the partial surface 2k in the center has a central opening 2g, wherein the central opening 2g extends parallel to 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 between the hub 21 and the sub-surface 2k, a gap 24 running transversely with respect to the axis A is formed.
  • the cover plate 2 has at least one opening 2a which is arranged at a distance from the center opening 2g, wherein the opening 2a forms a fluid-conducting connection between the front side 2h and the rear side 2i of the cover plate 2.
  • the fluid in the region of the opening 2a has a higher pressure than in the region of the central 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 in the interior 37, and then flows through the gap 2b and the gap 24 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 skin flow F are supplied.
  • the fferenzentrifugalrad 20 and the arrangement of the opening 2a are configured such that the rear side 25a of the fferenzentrifugalrades 20, the aperture 2a is not covered or covered by a rotation of the fferenzentrifugalrades 20 by 360 ° only during a partial angle ⁇ .
  • FIG. 12 shows a pump housing 3 in which a cover plate 2 and a fferenzentrifugalrad 20 is arranged.
  • the hub 21 is connected to a circular base part 30, wherein the blade 25 is connected via the end edge 28 with the base part 30.
  • the fferenzentrifugalrad 20 includes an end edge 26, a pressure-side blade edge 27, and a suction-side edge 39 and a blade outlet tip 35th
  • FIG. 13 shows the fferenzentrifugalrad 20 in a plan view, wherein the base member 30 is circular and with respect to the axis A has a maximum radius R1.
  • FIG. 13 shows an example of a possible arrangement of an opening or an opening 2a with respect to the SSenzentrifugalrad 20.
  • the opening 2a is not covered by the fferenzentrifugalrad 20 and by the back 25a of the fferenzentrifugalrades 20 so that the opening 2a is constantly open.
  • a flow in the direction of rotation R of the helical centrifugal wheel 20 is advantageously generated in order to hinder or prevent the entry of solid contaminants into the opening 2a.
  • a fluid-conducting connection between the front side 2h and the interior 37 is formed via the opening 2a in order to generate a fluid flow F1, which flows into the interior space 37 via the opening 2a and flows out of the interior space 37 via the gap 2b.
  • the ringenzentrifugalrad 20 could as in the FIGS. 1a and 1b be configured represented.
  • the hub 21 of the fferenzentrifugalrades 20 includes a crescent-shaped base portion 30, wherein the blade 25 is disposed on the crescent-shaped base portion 30 and the crescent-shaped base portion 30 with respect to the rotation axis A has a maximum radius R1 and a minimum radius R2.
  • the crescent-shaped base part 30 is extending with respect to the opening 2a in such a way designed such that the rear side 25a of the fferenzentrifugalrades 20, the aperture 2a at the minimum radius R2 is not covered, wherein the back 25a of the fferenzentrifugalrades 20, the aperture 2a covered during rotation of the fferenzentrifugalrades 20 by 360 ° during a partial angle ⁇ .
  • the opening 2a is thus briefly covered during each rotation of the fferenzentrifugalrades 20.
  • This embodiment has the advantage that in the region of the opening 2a advantageously a flow in the direction of rotation R of the fferenzentrifugalrades 20 is generated to complicate the entry of solid impurities in the opening 2a or prevent.
  • a further advantage is the fact that solid impurities, which accumulate at the inlet opening of the opening 2a, are mechanically removed by the hub 2a moving through the opening 2a, if the impurities protrude beyond the front side 2h.
  • 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 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 has an entrance surface 2m formed.
  • 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.
  • the cover plate 2 could, similar to those in FIG. 1a shown housing rear wall, have a cone angle ⁇ in the range between 5 ° and 70 °.
  • 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 opening 2a extends as in FIG. 4 represented at least partially opposite to the direction of rotation R of the fferenzentrifugalrades 20.
  • the thus extending aperture 2a has the advantage that solids can get through the opening 2a to the back 2i of the cover plate 2 less well.
  • 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 in the Recess 2c is arranged.
  • 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.
  • the entrance surface 2m preferably arranged facing away from the direction of rotation R arranged. 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 are at least partially formed by a substantially perpendicular or perpendicular to the axis A extending bore.
  • 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 parallel to the axis A and perpendicular to Rotation direction R runs.
  • 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.
  • a differently sized partial surface 2k is covered by the rear side 25a of the screw centrifugal wheel 20.
  • Screw centrifugal wheel 20 shown could, for example, the in FIG. 6 Covered with 2k part surface of the front 2h are covered on the with FIG. 1a and 1b described way.
  • Screw centrifugal wheel 20 shown could, for example, the in FIG. 6 2k2 designated partial surface of the front 2h are permanently covered.
  • 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.
  • the hub 21 rotating in the direction of rotation R over the part surface 2k or the screw centrifugal wheel 20 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 the 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. In particular from FIG.
  • 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 a further embodiment of a cover plate 2, which in contrast to the in FIG. 8 However, shown section has a flat extending part surface 2k and 2k2. 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.
  • 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. For the completion of 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 casting may have a thickness between 2 and 10 mm.
  • the cover plate 2 could also be made of a metal sheet.
  • the inventive method allows self-cleaning a fferenzentrifugalradpumpe 1.
  • the fferenzentrifugalradpumpe 1 has a rotatably mounted SSenzentrifugalrad 20 and arranged immediately adjacent to or behind the SSenzentrifugalrad 20 cover plate 2 with a central opening 2g, wherein a hub 21 of the fferenzentrifugalrades 20 or the SSenzentrifugalrad 15th
  • the bearing axis 33 passes through the central opening 2g, so that between the center 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 spirally extending 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 possibly located therein impurities on the spiraling depression 2d is supplied to the main flow F.
  • 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 housing rear wall 23 no seal is required. This allows a particularly low-maintenance embodiment.
  • FIG. 14 shows in a plan view another embodiment of the already in FIG. 6 shown.
  • Cover plate 2 The opening 2a and the entrance surface 2m again runs parallel to the axis A, wherein the opening 2a and 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.

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Claims (20)

  1. Pompe à roue centrifugale hélicale (1), comprenant un boîtier de pompe (3) avec une aperture pompe à admission (3a) et une paroi derrière de boîtier (23) située vis-à-vis de l'aperture pompe à admission comprenant une roue centrifugale hélicale (20), disposée rotativement à l'intérieur du boîtier de pompe (3), avec un moyeu (21) et une aube (25), et aussi comprenant un arbre d'entraînement rotatif (33) raccordé à la roue centrifugale hélicale (20), et aussi comprenant une plaque de recouvrement (2) disposée entre la roue centrifugale hélicale (20) et la paroi derrière de boîtier (23),
    la plaque de recouvrement (2) comprenant une aperture centrale (2g), par laquelle s'étend le moyeu (21) ou l'arbre d'entraînement (33),
    un espace intérieur (37) étant implémenté entre la plaque de recouvrement (2) et la paroi derrière de boîtier (23),
    la plaque de recouvrement (2) comprenant un côté avant (2h) orienté vers l'aperture pompe à admission (3a) et le côté avant (2h) comprenant une surface partielle (2k), le parcours de laquelle est implémenté adapté au côté arrière (25a) de la roue centrifugale hélicale (20) de telle manière qu'une première fente (24) de maximalement 3 mm est formée entre le côté avant (2h) de la plaque de recouvrement (2) et le côté arrière (25a) de la roue centrifugale hélicale (20),
    une deuxième fente (2b) étant formée entre l'aperture centrale (2g) de la plaque de recouvrement (2) et le moyeu (21) ou l'arbre d'entraînement (33), ladite deuxième fente (2b) étant raccordée à l'espace intérieur (37) et à la première fente (24) de manière convoyant de fluide,
    la plaque de recouvrement (2) comprenant au moins une percée (2a) disposée espacée de l'aperture centrale (2g), la roue centrifugale hélicale (20) et l'arrangement de la percée (2a) étant implémentés adaptés de telle maniére que le côté arrière (25a) de la roue centrifugale hélicale (20) ne couvre pas la percée (2a) en direction de visée parallèlement à un axe rotatif (A) de la roue centrifugale hélicale (20) ou, en rotation de la roue centrifugale hélicale (20) par 360°, la couvre seulement pendant un angle partiel,
    et la percée (2a) formant une connexion convoyant de fluide entre le côté avant (2h) et l'espace intérieur (37) pour générer un flux de fluide (F1), lequel coule dans l'espace intérieur (37) via la percée (2a) et puis coule hors de l'espace intérieur (37) via la fente (2b).
  2. Pompe à roue centrifugale hélicale selon la revendication 1, caractérisée en ce que la fente (24) comporte une largeur dans la gamme de 0,5 mm à 2 mm.
  3. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface partielle (2k) s'étend substantiallement en forme de cône tronqué.
  4. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, 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).
  5. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que la percée (2a) comporte vers le côté avant (2h) une aperture d'entrée (21), que le côté avant (2h) comporte une enfonçure (2c) et que l'aperture d'entrée (21) est disposée dans ladite enfonçure (2c).
  6. Pompe à roue centrifugale hélicale selon la revendication 5, caractérisée en ce que l'aperture d'entrée (21) forme une surface d'entrée (2m) s'étendant substantiellement en parallèle à l'axe rotatif (A).
  7. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications 5 ou 7, caractérisée en ce que l'enfonçure (2c) est formée au moins partiellement par un alésage, lequel s'étend substantiellement perpendiculairement à l'axe rotatif (A).
  8. Pompe à roue centrifugale hélicale selon la revendication 5 ou 6, 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 (21) aussi, forme déjà part de la pièce coulée non traitée.
  9. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la percée (2a) s'étend perpendiculairement ou substantiellement perpendiculairement par rapport à la surface partielle (2k).
  10. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la percée (2a) s'étend transversalement par rapport à la surface partielle (2h).
  11. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications 1 à 7 ou 9 à 10, caractérisée en ce que la plaque de recouvrement (2) consiste d'une tôle métallique.
  12. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que la percée (2a) s'étend à l'encontre de la direction rotative (R) de la roue centrifugale hélicale (20).
  13. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que la roue centrifugale hélicale (20) comporte une direction rotative (R) et que la surface d'entrée (2m) formée par l'aperture d'entrée (21) de la percée (2a) s'étend substantiellement en parallèle à l'axe rotatif (A) et détournée de la direction rotative (R).
  14. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyeu (21) de la roue centrifugale hélicale (20) comporte un élément basique de forme circulaire (30), que l'aube (25) est disposée sur l'élément basique de forme circulaire (30) et que l'élément basique de forme circulaire (30) est disposé concentriquement à l'axe rotatif (A) et comporte un rayon maximal (R1),
    le rayon maximal (R1) étant adapté par rapport à la percée (2a) de telle maniére que l'élément basique (30) ne couvre pas la percée (2a).
  15. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications 1 à 12, caractérisée en ce que le moyeu (21) de la roue centrifugale hélicale (20) comporte un élément basique de forme faucille (30), que l'aube (25) est disposée sur l'élément basique de forme faucille (30) et que l'élément basique de forme faucille (30) comporte, par rapport à l'axe rotatif (A), un rayon maximal (R1) et un rayon minimal (R2),
    l'élément basique de forme faucille (30) étant implémenté s'étendant par rapport à la percée (2a) de telle manière que l'élément basique (30) ne couvre pas la percée (2a) en cas du rayon minimal (R2) et que l'élément basique (30) couvre la percée (2a) en une rotation de la roue centrifugale hélicale (20) par 360° pendant un angle partiel (Δ).
  16. Pompe à roue centrifugale hélicale selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface partielle (2h) comporte une enfonçure s'étendant en spirale (2d), laquelle s'étend substantiellement, commençant dans la région de l'aperture centrale (2g), le long de la surface partielle (2h) vers l'extérieur.
  17. Pompe à roue centrifugale hélicale selon la revendication 16, caractérisée en ce que l'enfonçure s'étendant en spirale (2d) s'étend en direction rotative (A) de l'intérieur vers l'extérieur.
  18. Procédé pour l'autoépuration d'une pompe à roue centrifugale hélicale (1), comprenant une roue centrifugale hélicale (20), laquelle est supportée rotativement, aussi qu'une plaque de recouvrement (2), laquelle est disposée, formant une première fente (24), au côté derrière (25a) de la roue centrifugale hélicale (20) et laquelle comporte une aperture centrale (2g), la plaque de recouvrement (2) comprenant une percée (2a) espacée par rapport à l'aperture centrale (2g),
    un moyeu (21) ou un arbre d'entraînement (33) de la roue centrifugale hélicale (20) s'étendant par l'aperture centrale (2g), de sorte qu'entre l'aperture centrale (2g) et le moyeu (21) ou l'arbre d'entraînement (33) une deuxième fente (2b) soit implémenté convoyant de fluide,
    la roue centrifugale hélicale (20) et l'arrangement de la percée (2a) étant implémentés respectivement adaptés de telle manière qu', en direction de visée parallèlement à un axe rotatif (A) de la roue centrifugale hélicale (20), la percée (2a) n'est pas couverte pendant la rotation de la roue centrifugale hélicale (20) ou est couverte seulement pendant un angle partiel (Δ),
    la roue centrifugale hélicale (20) étant tournée en direction rotative (R), et ainsi un fluide étant convoyé le long d'un flux principal (F), un flux partiel (F1) du fluide s'écoulant par la percée (2a) au côté derrière (2i) de la plaque de recouvrement (2), et puis ledit flux partiel (F1) s'écoulant vers le flux principal (F) via les fentes (2b, 24), dû à l'écart de pression ayant lieu entre la percée (2a) et la deuxième fente (2b).
  19. Procédé selon la revendication 18, caractérisé en ce que la plaque de recouvrement (2) comporte une enfonçure s'étendant en spirale (2d) à son côté avant (2h), l'enfonçure en spirale (2d) s'étendant en direction rotative (R) de l'intérieur à l'extérieur, 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).
  20. Procédé selon la revendication 18 ou 19, 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).
EP11796936.0A 2010-11-24 2011-11-24 Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes Active EP2643595B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DK17152843.3T DK3179112T3 (da) 2010-11-24 2011-11-24 Pumpedækplade med gennemgangshuller, der er udformet som inertifiltre
EP17152843.3A EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
EP11796936.0A EP2643595B1 (fr) 2010-11-24 2011-11-24 Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes

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/EP2011/070995 WO2012069618A1 (fr) 2010-11-24 2011-11-24 Pompe à roue hélicocentrifuge autonettoyante présentant recirculation en aval de la roue à aubes
EP11796936.0A EP2643595B1 (fr) 2010-11-24 2011-11-24 Pompe à écoulement radial autonettoyante avec recirculation derrière la roue à aubes

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP17152843.3A Division EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
EP17152843.3A Division-Into EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels

Publications (2)

Publication Number Publication Date
EP2643595A1 EP2643595A1 (fr) 2013-10-02
EP2643595B1 true EP2643595B1 (fr) 2017-05-24

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
EP17152843.3A Active EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
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
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 (3)

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
EP17152843.3A Active EP3179112B1 (fr) 2010-11-24 2011-11-24 Couvercle de pompe avec trous formés comme filtres inertiels
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

Country Status (7)

Country Link
US (2) US9879695B2 (fr)
EP (4) EP2458225A1 (fr)
JP (2) JP6028162B2 (fr)
CN (2) CN103339386B (fr)
DK (3) DK2643595T3 (fr)
RU (2) RU2566865C2 (fr)
WO (2) WO2012069619A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2016193387A1 (fr) * 2015-06-03 2016-12-08 Gea Tuchenhagen Gmbh Rotor pour pompe centrifuge et pompe centrifuge
RU170010U1 (ru) * 2016-09-28 2017-04-11 Валентина Ильинична Жушман Оседиагональный шнековый насос
JP7275259B2 (ja) * 2017-10-12 2023-05-17 ウィアー・ミネラルズ・オーストラリア・リミテッド スラリーポンプ用の入口構成要素
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

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297001A (en) * 1939-03-17 1942-09-29 Bour Harry E La Self-priming centrifugal pump
US2769390A (en) * 1954-06-02 1956-11-06 Brummer Seal Co Water cooled annular seal
CH396639A (de) * 1959-10-08 1965-07-31 Voith Gmbh J M Kreiselpumpe
US3115841A (en) * 1961-11-16 1963-12-31 Thompson Ramo Wooldridge Inc Pump assembly
DE1528651B2 (de) * 1965-01-23 1975-12-18 Albert 5204 Lohmar Blum Schmutzwasserpumpe
US3632220A (en) * 1970-08-27 1972-01-04 Chrysler Corp Coolant pump
SU737654A1 (ru) * 1974-12-24 1980-05-30 Всесоюзный Ордена Ленина Проектно- Изыскательский И Научно-Исследовательский Институт "Гидропроект" Им.С.Я.Жука Центробежный насос
CH627236A5 (fr) * 1978-02-14 1981-12-31 Martin Staehle
CH633617A5 (de) * 1978-08-31 1982-12-15 Martin Staehle Kreiselpumpe mit einschaufel-laufrad zur foerderung von langfaserigen aufgeschwemmten feststoffen.
AU538118B2 (en) * 1979-10-29 1984-08-02 Rockwell International Inc. Seal assembly
US4575312B1 (en) * 1982-06-02 1989-05-16 Impeller
CH660511A5 (en) * 1982-12-22 1987-04-30 Martin Staehle Centrifugal pump having a single-blade impeller
CH662864A5 (en) 1983-04-20 1987-10-30 Martin Staehle Centrifugal pump having an open-type single-blade impeller
IT1174991B (it) * 1983-07-06 1987-07-01 Pompe F B M Spa Pompa centrifuga per materiali e prodotti molto densi e/o viscosi
US4773823A (en) * 1984-11-13 1988-09-27 Tolo, Inc. Centrifugal pump having improvements in seal life
DE3517499A1 (de) * 1985-05-15 1986-11-20 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Laufrad
JPS6352992U (fr) * 1986-09-25 1988-04-09
SU1528035A1 (ru) * 1987-02-18 1994-10-30 А.И. Золотарь Центробежный насос
FI872967A (fi) * 1987-07-06 1989-01-07 Ahlstroem Oy Pump och foerfarande foer separering av gas med pumpen ur mediet som skall pumpas.
CA2015777C (fr) * 1990-04-30 1993-10-12 Lynn P. Tessier Pompe centrifuge
US5167418A (en) * 1991-04-04 1992-12-01 Dunford Joseph R Grit protector
US5195867A (en) * 1992-03-05 1993-03-23 Barrett, Haentjens & Co. Slurry pump shaft seal flushing
US5553868A (en) * 1994-11-03 1996-09-10 Dunford; Joseph R. Seal cavity throat bushing
US6190121B1 (en) * 1999-02-12 2001-02-20 Hayward Gordon Limited Centrifugal pump with solids cutting action
GB9907372D0 (en) * 1999-03-30 1999-05-26 Concentric Pumps Ltd Improvements in pumps
US6422358B2 (en) * 2000-01-24 2002-07-23 William T. Deibel Ventilated disc brake rotor
US7008177B2 (en) * 2002-11-14 2006-03-07 Cummins Inc. Centrifugal pump with self cooling and flushing features
JP2005061391A (ja) * 2003-07-30 2005-03-10 Aisin Seiki Co Ltd ポンプ装置
US7037069B2 (en) * 2003-10-31 2006-05-02 The Gorman-Rupp Co. Impeller and wear plate
CN101280922B (zh) * 2006-11-07 2010-06-09 河北宏业机械股份有限公司 一种燃油加热器的锥盖形燃烧器
CN101294580B (zh) 2007-04-26 2010-04-21 李世煌 一种螺旋流恒压泵
US9350475B2 (en) 2010-07-26 2016-05-24 Qualcomm Incorporated Physical layer signaling to user equipment in a wireless communication system
US8892118B2 (en) 2010-07-23 2014-11-18 Qualcomm Incorporated Methods and apparatuses for use in providing position assistance data to mobile stations

Also Published As

Publication number Publication date
RU2559958C2 (ru) 2015-08-20
WO2012069618A1 (fr) 2012-05-31
RU2566865C2 (ru) 2015-10-27
US20130243634A1 (en) 2013-09-19
CN103299085A (zh) 2013-09-11
JP5988106B2 (ja) 2016-09-07
WO2012069619A1 (fr) 2012-05-31
CN103339386A (zh) 2013-10-02
US20130243568A1 (en) 2013-09-19
EP2458225A1 (fr) 2012-05-30
DK2643595T3 (en) 2017-09-18
RU2013128532A (ru) 2014-12-27
DK2643596T3 (en) 2017-10-30
RU2013128547A (ru) 2014-12-27
EP2643596A1 (fr) 2013-10-02
JP2014502328A (ja) 2014-01-30
EP3179112A1 (fr) 2017-06-14
JP2014500930A (ja) 2014-01-16
EP2643596B1 (fr) 2017-07-12
CN103339386B (zh) 2017-03-29
EP2643595A1 (fr) 2013-10-02
US9879695B2 (en) 2018-01-30
CN103299085B (zh) 2016-11-16
EP3179112B1 (fr) 2020-08-05
US9709071B2 (en) 2017-07-18
DK3179112T3 (da) 2020-10-12
JP6028162B2 (ja) 2016-11-16

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