EP4001665B1 - Pompe centrifuge dotée d'un carter de pompe - Google Patents

Pompe centrifuge dotée d'un carter de pompe Download PDF

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Publication number
EP4001665B1
EP4001665B1 EP21208695.3A EP21208695A EP4001665B1 EP 4001665 B1 EP4001665 B1 EP 4001665B1 EP 21208695 A EP21208695 A EP 21208695A EP 4001665 B1 EP4001665 B1 EP 4001665B1
Authority
EP
European Patent Office
Prior art keywords
base plate
impeller
suction connector
centrifugal pump
suction
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
EP21208695.3A
Other languages
German (de)
English (en)
Other versions
EP4001665A1 (fr
Inventor
Robert SORGE
Benjamin Wegner
Johannes REUSCHEL
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.)
Wilo SE
Original Assignee
Wilo SE
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Publication date
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Publication of EP4001665A1 publication Critical patent/EP4001665A1/fr
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Publication of EP4001665B1 publication Critical patent/EP4001665B1/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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622—Adjusting the clearances between rotary and stationary parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0033—By-passing by increasing clearance between impeller and its casing
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a centrifugal pump with a pump housing, an impeller and a suction connection forming a suction opening being arranged in the pump housing and the suction connection being mounted axially displaceably on a base plate of the pump housing on the inside of the housing.
  • the invention also relates to a method for producing a centrifugal pump with an impeller.
  • FR 2 290 133 A6 describes a centrifugal pump whose plate, which seals the central cavity of the pump body, has two parts, one of which is fixed to the body, while the other inner part can be displaced relative to the outer part in a direction parallel to the axis of the turbine.
  • WO 2017/160624 A1 describes a seal for use with pump housing members that are adjustable relative to one another, the seal comprising an annular band and a resilient annular flange, the flange being oriented at a non-perpendicular angle to a first surface of the annular band so that the seal in Use allows for greater adjustment between the adjustable pumping elements while maintaining a reliable seal between the pumping elements.
  • the prior art has for some time dealt with configurations for readjusting the gap in order to compensate for wear during operation of the centrifugal pump and to keep the level of efficiency constantly high.
  • the solution approaches include, for example, a height-adjustably mounted base plate, a height-adjustably mounted suction nozzle or a change in an axial position of the impeller on a motor shaft of a drive motor.
  • the configurations known to date have not proven to be particularly suitable in continuous operation for long-term adjustment of the gap between the impeller and the suction port provided in the base plate of the pump housing and forming a suction opening.
  • An essential point of the solution described in more detail below is to store the suction nozzle in the base plate in an axially displaceable manner, as a result of which the distance, also known as the gap size, can be adjusted.
  • the gap dimension can be adjusted in a particularly process-reliable manner and with a high level of repeat accuracy compared to the solutions known from the prior art.
  • sealing between the base plate and the movable suction nozzle using the sealing collar is also a central aspect.
  • a conventional seal known from the prior art in the form of a radially sealing O-ring is disadvantageous for a number of reasons.
  • the proposed sealing collar which is particularly molded onto the suction nozzle, allows the distance to be set precisely with little effort while at the same time sealing and simple and cost-effective production.
  • a radially sealing O-ring known from the prior art requires a radial groove in the suction port, which at the same time represents an undercut when demoulding. Specifically, in order to produce such an undercut by injection molding, a complex mold design of the injection mold would be required or mechanical post-processing may be necessary.
  • the proposed centrifugal pump does not require the aforementioned manufacturing measures and is therefore significantly easier to manufacture.
  • Pivoted relative to the base plate means in particular that the surface normal of the surface is pivoted by an angle >0° relative to the surface normal of the base plate, in particular in a region outside the surface. If the surface of the base plate extends parallel to the horizontal, in particular in an area outside the surface, pivoted means, for example, that the surface is pivoted relative to the horizontal.
  • An in particular circular recess is preferably provided within the base plate, into which the suction connection can be inserted on the inside of the housing in such a way that the surfaces come to rest on one another and form a surface contact.
  • the suction opening is preferably designed as an opening within the suction socket, so that in the assembled state the central axes of the recess, the opening and the suction opening run parallel to one another and/or surface normals of the surface of the suction socket and/or the base plate, in particular in an area outside the surfaces , run parallel to the central axis of the suction port.
  • the term axial also preferably refers to the central axis of the suction nozzle.
  • twisting means, in particular, twisting about the central axis and/or about the axis formed by the suction opening.
  • the suction connector is preferably designed like a disk, with a part forming the suction opening preferably lying flush against the underside of the base plate in the assembled state. The part forming the suction opening protrudes in the direction of the central axis of the suction connection piece, preferably in the direction of the underside of the suction connection piece, beyond the surface and/or is framed all around by the surface.
  • a radial gap between the outside diameter of the suction port and the cylinder surface of the base plate is subject to manufacturing tolerances of the injection molding process.
  • the radial gap In order to absorb the manufacturing tolerances and to ensure a process-stable joinability of the suction nozzle and the base plate, the radial gap must have a minimum size. Experiments have shown that if this minimum is accepted, the hydraulic efficiency of the centrifugal pump drops considerably. The drop in efficiency is due in particular to the fact that due to of the radial gap between the suction nozzle and the base plate, an internal volume flow loss occurs. However, this loss of volume flow is prevented by the proposed sealing collar.
  • the sealing collar is preferably arranged on the radial peripheral surface of the suction connection piece, which in the mounted state is arranged in particular corresponding to the cylinder surface and/or is in contact with the cylinder surface.
  • the sealing collar is more preferably designed as a circumferential, thin-walled collar and/or molded onto the suction port and/or designed in one piece with the suction port, so that only a single manufacturing step is necessary.
  • the sealing collar preferably lies in a parting plane of the two tool halves and does not represent an undercut during demoulding.
  • the proposed centrifugal pump can be produced inexpensively by means of an injection molding process using simple so-called "open/close” tools without a slide, without the need for complex mechanical and/or manual post-processing.
  • the suction connection can on the one hand be easily adjusted axially relative to the base plate, while the proposed sealing collar enables sealing with little friction during axial adjustment.
  • the surfaces and the sealing collar represent related products which, however, are not necessarily but can be advantageously combined with one another to form the proposed centrifugal pump.
  • the surfaces allow precise, stepless adjustment of the distance between the suction nozzle and the base plate, for example with the help of a scale.
  • the centrifugal pump allows the distance to be adjusted without special tools, without having to open the pump housing, the distance being adjusted independently of a connection between a motor shaft of a drive motor and the impeller of the centrifugal pump.
  • the impeller and the motor shaft can be connected to one another by a cylindrical feather key connection. Due to the sealing collar, the centrifugal pump is designed to be virtually seal-free in the sense of a conventional seal using an O-ring seal.
  • the surfaces are designed as helical surfaces or as screw surfaces
  • the suction nozzle and the base plate each have two, three, four or more surfaces arranged one behind the other in a rotationally symmetrical manner
  • the surfaces are designed in the manner of inclined planes
  • the surfaces have the same slope and/or the surfaces are designed to correspond to one another.
  • the surfaces are preferably each of the same design and/or run, in a plan view of the base plate and/or the suction nozzle, in a circle and/or concentrically around the central axis of the suction opening.
  • the base plate and the suction nozzle each extend rotationally symmetrically by a 120° division around the central axis, so that when the suction nozzle and base plate are joined together, there is a surface contact between the respective surfaces.
  • the surfaces slide off one another, so that this twisting or rotational movement is accompanied by a translation of the suction nozzle in the axial direction of the suction opening and/or in relation to the base plate.
  • the surfaces can be flat, but a rib-like structure can also be provided in which the surfaces are formed by the ribs, in particular to save material and for a construction suitable for plastic.
  • the surfaces can have a similar or increasing gradient along their extension.
  • the centrifugal pump has a fastening means by which the suction nozzle can be fixed to the base plate and/or the centrifugal pump has a fastening means designed as a screw, which is guided through an arcuate elongated hole provided on the base plate.
  • An elongated hole is preferably formed in each surface of the base plate and/or the surfaces are each interrupted by an elongated hole, with a respective fastening means being passed through.
  • a scale is preferably introduced in particular on an inner edge, in particular of each elongated hole, through which a current adjustment path can be read.
  • the scale is preferably divided in such a way that a rotation from one division line of the scale to the next division line results in an axial movement of the suction connector of 0.1 mm.
  • a maximum possible axial adjustment path can expediently be selected by the gradient of the surfaces in such a way that the maximum spread of a tolerance chain of the impeller can be compensated for.
  • the adjustment path can be 2, 3, 4 or 5 mm, for example.
  • the fixing means is advantageously fixed after the desired distance has been set, for example by screwing the screw through the slot in the base plate the suction nozzle.
  • a thread for the screw is preferably provided in the suction connection piece, it being possible for the head of the screw to rest on the underside of the base plate facing away from the inside.
  • the fixation can be done by self-tapping screws, wherein the suction port can only have cylindrical bores.
  • the thread can be formed by screwing in the screws.
  • the suction connection piece and base plate are in particular clamped by the fastening means and are thereby connected in a frictionally and/or force-fitting manner.
  • the surfaces are pivoted in such a way that the distance is reduced by rotating the suction nozzle in the direction of rotation of the impeller.
  • solids can become lodged between the impeller, in particular an edge of the impeller, and the suction nozzle, as a result of which part of the torque acting on the impeller is transmitted to the suction nozzle by friction. This can cause the fastener to come loose.
  • the surfaces are pivoted in such a way that rotating the suction nozzle in the direction of rotation of the impeller moves the suction nozzle axially in the direction of the impeller, only the clamping force of the fastening means is increased by the torque. If the suction nozzle is clamped in relation to the base plate by screws as fastening means, the surfaces will be in contact in such a case, which prevents the screws from loosening.
  • the base plate has a cylindrical surface against which the sealing collar is in particular circumferential and/or touching and/or the sealing collar is designed as a circumferential, thin-walled collar, the sealing collar is injection-molded onto the suction nozzle and/or the sealing collar with the suction nozzle is made in one piece.
  • the cylinder surface is in particular part of a cylinder-like recess in the base plate on the inside of the housing, into which the suction connection is inserted in the assembled state.
  • the surface normal of the cylinder surface preferably extends orthogonally to the central axes of the recess, the opening and/or the suction opening.
  • a seal in particular a circumferential and/or a V-ring seal, is provided on the suction connection between the surface and the peripheral surface, which rests in particular in contact with the base plate.
  • the V-ring seal is preferably made of nitrile rubber and/or stretched over a diameter of the suction port that is stepped down.
  • a sealing edge of the V-ring seal is preferably in contact with an annular planar surface of the base plate.
  • the V-ring seal allows the suction port to be statically sealed to the outside, resulting in low leakage.
  • the V-ring seal represents a two-stage, smooth-running seal that can be moved without lubrication, so that flow losses between the high-pressure and low-pressure areas within the pump housing are minimized and a high hydraulic efficiency of the centrifugal pump is achieved.
  • the centrifugal pump is preferably operated submerged. In the case of a dry installation, a radially sealing O-ring can be provided between the suction connection and the base plate.
  • the sealing collar is oversized in a non-mounted state compared to the cutout in the base plate, in particular the cylinder surface on which the sealing collar rests, in particular touching, in a mounted state.
  • the sealing collar is preferably designed such that the oversize of the sealing collar is pushed away by fitting the suction socket and base plate into one another, i.e. in particular by inserting the suction socket into the base plate, so that the radial gap between the suction socket and base plate is closed in particular completely and/or circumferentially.
  • the sealing collar is preferably designed as a plastically deformable pinch edge.
  • the centrifugal pump has a drive motor and the impeller has a metal insert, which is in particular injected and which is operatively connected to a motor shaft of the drive motor.
  • the metal insert is preferably also injected into the impeller during manufacture of the impeller by means of an injection molding process.
  • the drive motor is preferably designed as a submersible motor.
  • the pump housing is preferably attached to a motor flange of the drive motor.
  • a metal insert in particular an injection-molded suction connector, is provided on the side of the suction connector facing the impeller.
  • the suction nozzle metal insert preferably extends concentrically around the suction opening.
  • the adjustable distance is preferably formed between a planar surface of the suction nozzle metal insert and the impeller, in particular edges of an impeller blade.
  • the suction socket metal insert which is advantageously provided to protect against wear, can be designed as a metal sheet which is preferably arranged on the upper side of the suction socket and/or extends with a surface normal in the direction of the central axis of the suction opening.
  • the impeller is non-positively connected to the motor shaft by means of a conical connection.
  • the suction nozzle is mounted in the base plate concentrically to the axis of the motor shaft.
  • the base plate can be screwed onto the pump housing, the impeller is designed as a semi-open multi-channel impeller, the impeller has at least one impeller blade and the distance between the at least one impeller blade and the suction connector can be changed and/or is between Pump housing and base plate a peripheral profile seal, in particular made of nitrile rubber, provided to seal the pump housing and base plate against each other.
  • the base plate and/or the suction nozzle consists of glass fiber reinforced plastic, in particular glass fiber reinforced plastic polypropylene.
  • the base plate and/or the suction nozzle can also be made of gray cast iron, precision cast iron or polyurethane. In the case of gray cast iron, mechanical processing of the surfaces is preferred.
  • only the surfaces of the suction socket and the base plate that form the surface contact can be made of plastic and inserted into the suction socket and the base plate.
  • the object of the invention is also achieved by using a centrifugal pump as described above as a submersible sewage and/or sewage pump.
  • Dirty water and/or sewage submersible pumps are used in particular for pumping dirty water, for example from floods, in flooded construction pits, in laundry rooms, in muddy pits, in biotopes and/or from garden ponds, from seepage shafts and in cellars, and in particular for pumping water with different degrees of contamination such as stones, mud or rubble.
  • the object of the invention is also achieved by a method for producing a centrifugal pump according to claim 15.
  • the method preferably also includes injection molding of the pump housing and/or the impeller.
  • Injection molding is advantageously carried out using glass fiber reinforced plastic, in particular glass fiber reinforced polypropylene, as the material and/or in an injection molding machine, with the material being injected into an injection mold under pressure is injected.
  • the injection molding tool is preferably designed as a negative mold of the base plate, the suction port, the pump housing and/or the impeller.
  • the centrifugal pump has a pump housing 1 .
  • an impeller 2 Arranged within the pump housing is an impeller 2 and a suction nozzle 4 which forms a suction opening and is supported on a base plate 3 on the inside of the housing.
  • the impeller 2 is designed as a semi-open multi-channel impeller and has a plurality of impeller blades 2 , not shown in any more detail, which face the suction port 4 .
  • the centrifugal pump is driven by a submersible motor, the pump housing 1 being attached to a motor flange.
  • Pump housing 1, impeller 2, base plate 3 and suction nozzle 4 are made of glass fiber reinforced plastic, in particular glass fiber reinforced polypropylene.
  • a metal insert injected into the impeller 2 is used to connect it to the motor shaft.
  • the impeller 2 is non-positively connected to the motor shaft by a conical connection.
  • the bottom plate 3 is screwed to the pump housing 1 from below, as shown in FIG 1 recognizable, with a circumferential profile seal 9 made of nitrile rubber being provided between the pump housing 1 and the base plate 3 .
  • the suction port 4 is mounted in the base plate 3 concentrically to the axis of the motor shaft.
  • a suction nozzle metal insert 10 in the form of a metal sheet is injected into the suction nozzle 4 on the side facing the impeller 2, as shown in FIG figure 5 can be seen.
  • the base plate 3 has a circular cylindrical surface 5 into which the underside of the suction nozzle 4 can be inserted.
  • the suction nozzle 4 which is circular in plan view, three rotationally symmetrical surfaces 6 are formed one behind the other in a 120° division and concentrically around the suction opening, each of which has the same slope and, in the inserted or mounted state, relative to the base plate 3 and an upper side of the suction port 4 are pivoted.
  • the central axis formed by the surfaces 6 of the suction connection 4 corresponds to the central axis of the suction opening of the suction connection 4.
  • three rotationally symmetrical surfaces 6 are also formed one behind the other and around the suction opening on an underside of the cylinder surface 5 of the base plate 3, so that by inserting the suction connection 4 in the base plate 3, the respective surfaces 6 of the base plate 3 and of the suction nozzle 4 touch one another and form a surface contact.
  • the central axis formed by the surfaces 6 of the base plate 3 runs perpendicularly to the longitudinal axis of the base plate 3.
  • the surfaces 6 can be as shown 3 , be designed as continuous surfaces 6, with the surfaces 6 of the base plate 6 being interrupted by elongated holes 7 described below, or in the case of the suction nozzle 4 be designed with a rib-like structure in order to jointly form a kind of turning surfaces or screw surfaces.
  • the surface 6 of the base plate 3 and of the suction connection 4 which is pivoted relative to the base plate 3 and rests against one another in the assembled state, have the effect that a distance between the impeller 2 and the suction connection 4 can be changed by rotating the suction connection 4 about an axis defined by the suction opening .
  • the suction nozzle 4 by turning the suction nozzle 4, the distance between the edges of the impeller blades and the flat surface of the injected suction nozzle metal insert 10 can be varied, since the surfaces 6 slide on one another, so that the rotational movement is also accompanied by a translation of the suction nozzle 4 in the axial direction.
  • three fastening means 8 in the form of screws are provided, which are guided through three arcuate elongated holes 7 provided on the base plate 3, as shown in FIG 4 can be seen.
  • the fasteners 8 each dive from below through the elongated hole 7 in the base plate 3.
  • the direction of rotation of the impeller 2 is selected such that when the suction nozzle 4 rotates in the direction of rotation of the impeller 2, the suction nozzle 4 moves axially in moves in the direction of impeller 2. If the suction port 4 is clamped as described above by means of fasteners 8 designed as screws, the torque only increases the clamping force of the fasteners 8 since the surfaces 6 are in contact, so that the fastener 8 is prevented from loosening.
  • a scale 11 is introduced on an inner edge of each elongated hole 7 .
  • the division is selected in such a way that a rotation from one division mark to the next results in an axial movement of the suction nozzle of 0.1 mm.
  • the maximum possible axial adjustment path is selected by the slope of the surfaces 6 in such a way that a maximum spread of a tolerance chain of the impeller seat can be compensated for, with an adjustment path of 3 mm being required for this in the present case.
  • the scale can also have finer or coarser gradations.
  • a gap is required between the radial contact surfaces 6 of the two components 3, 4.
  • a lost volume flow can escape from the hydraulic chamber of the centrifugal pump into the environment through this gap.
  • an internal loss of volume flow can occur in the hydraulic chamber between the high and low pressure areas.
  • a circular V-ring seal 13 is provided on the suction connection 4 between the surface 6 and a radial peripheral surface 12 of the suction connection 4 , which rests on the base plate 3 .
  • the V-ring seal 13 is shown in 1 , on the one hand on the left inside the centrifugal pump and on the other hand as an enlargement with a border on the right.
  • the V-ring seal 13 is stretched over a diameter of the suction nozzle 4 that is offset downwards.
  • the sealing edge of the V-ring seal 13 is in contact with an annular planar surface of the base plate 3 .
  • the spring effect of the V-ring seal 13 compensates for the axial movement when the suction connector 4 is turned, so that the sealing effect is guaranteed in every position of the suction connector 4 .
  • the sealing collar 14 which rests against the cylindrical surface 5 of the base plate 3 in the assembled state.
  • the sealing collar 14 is oversized compared to the cylinder surface 5 of the base plate 3, i.e. a larger diameter than the inner diameter of the cylinder surface 5.

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Claims (15)

  1. Pompe centrifuge dotée d'un carter de pompe (1), dans laquelle
    sont disposées une roue à aubes (2) et une tubulure d'aspiration (4), formant un orifice d'aspiration et pouvant être insérée dans une plaque de fond (3) du carter de pompe,
    la tubulure d'aspiration (4) est logée sur la plaque de fond (3) du carter de pompe et est ainsi mobile axialement de sorte que la tubulure d'aspiration (4) et la plaque de fond (3) présentent respectivement au moins une surface (6), pivotée par rapport à la plaque de fond (3) et reposant de manière adjacente à une autre, de sorte que, par une rotation de la tubulure d'aspiration (4), une distance entre la roue à aubes (2) et la tubulure d'aspiration (4) puisse être modifiée,
    caractérisée en ce que
    les surfaces (6) sont pivotées de telle manière que, par une rotation de la tubulure d'aspiration (4) dans la direction de rotation de la roue à aubes (2), la distance se trouve réduite.
  2. Pompe centrifuge selon la revendication précédente, dans laquelle les surfaces (6) sont conçues sous forme de surfaces dentées ou de surfaces de vissage, la tubulure d'aspiration (4) et la plaque de fond (3) présentent respectivement deux, trois, quatre ou plus de quatre surfaces (6) disposées les unes derrière les autres de manière symétrique en rotation, les surfaces (6) présentent la même pente, et/ou les surfaces (6) sont conçues pour coïncider les unes avec les autres.
  3. Pompe centrifuge selon l'une des revendications précédentes, dotée d'un moyen de fixation (8) par lequel la tubulure d'aspiration (4) peut être fixée sur la plaque de fond (3), et/ou dotée d'un moyen de fixation (8) conçu sous forme de vis, lequel est mené par un trou oblong (7) construit en forme de coude prévu sur la plaque de fond.
  4. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle la tubulure d'aspiration (4) présente une bande d'étanchéité (14) prévue sur une surface périphérique (12) radiale de la tubulure d'aspiration (4) et étant adjacente à la plaque de fond (3) dans l'état inséré, où la bande d'étanchéité (14) est conçue en forme d'une bande périphérique à parois minces, la bande d'étanchéité (14) est conçue surmoulée sur la tubulure d'aspiration (4), et/ou la bande d'étanchéité (14) est conçue en une seule pièce avec la tubulure d'aspiration (4).
  5. Pompe centrifuge selon la revendication précédente, dans laquelle la plaque de fond (3) présente une surface cylindrique (5) sur laquelle repose la bande d'étanchéité (14), en particulier de manière périphérique et/ou en l'effleurant.
  6. Pompe centrifuge selon l'une des revendications 4 ou 5, dans laquelle un joint (13), notamment un joint (13) périphérique et/ou annulaire en V, lequel repose sur la plaque de fond (3), est prévu sur la tubulure d'aspiration (4) entre les surfaces (6) et la surface périphérique (12).
  7. Pompe centrifuge selon l'une des revendications 4 à 6, dans laquelle la bande d'étanchéité (14) présente, vis-à-vis d'une surface cylindrique (5) de la plaque de fond (3), sur laquelle la bande d'étanchéité (14) est adjacente à l'état monté, une dimension en excès dans un état non monté.
  8. Pompe centrifuge selon l'une des revendications précédentes, dotée d'un moteur d'entrainement et dans laquelle la roue à aubes (2) présente en particulier un insert métallique surmoulé, lequel est en communication active avec un arbre moteur du moteur d'entrainement.
  9. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle un insert métallique (10) de tubulure d'aspiration, en particulier surmoulé, est prévu sur le côté de la tubulure d'aspiration (4) orienté vers la roue à aubes (2).
  10. Pompe centrifuge selon la revendication précédente, dans laquelle la roue à aubes (2) est reliée par complémentarité des forces avec l'arbre moteur au moyen d'une connexion conique.
  11. Pompe centrifuge selon l'une des deux revendications précédentes, dans laquelle la tubulure d'aspiration (4) est logée dans la plaque de fond (3) de manière concentrique par rapport à l'axe de l'arbre moteur.
  12. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle la plaque de fond (3) peut être vissée sur le carter de pompe (1), où la roue à aubes (2) est conçue comme une roue multi canaux semi ouverte, où la roue à aubes (2) présente au moins une aube de roue et la distance entre l'au moins une aube de roue et la tubulure d'aspiration (4) peut être modifiée par une rotation de la tubulure d'aspiration (4), et/ou dans laquelle un joint profilé (9) périphérique, notamment en caoutchouc nitrile, est prévu entre le carter de pompe (1) et la plaque de fond (3).
  13. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle la plaque de fond (3) et/ou la tubulure d'aspiration (4) présentent une matière plastique renforcée de fibres de verre, notamment du polypropylène renforcé de fibres de verre.
  14. Utilisation d'une pompe centrifuge selon l'une des revendications précédentes en tant que pompe immergée pour eaux sales et/ou eaux usées.
  15. Procédé de fabrication d'une pompe centrifuge dotée d'un carter de pompe (1) et d'une roue à aubes (2) présentant les étapes :
    de moulage par injection d'une plaque de fond (3) et d'une tubulure d'aspiration (4) pouvant être insérée dans la plaque de fond (3) et pouvant reposer sur celle-ci, de telle manière que la tubulure d'aspiration (4) et la plaque de fond (3) présentent respectivement au moins une surface (6) pivotée par rapport à la plaque de fond (3) et étant adjacente à une autre à l'état monté, de sorte que, par une rotation de la tubulure d'aspiration (4), une distance entre la roue à aubes (2) et la tubulure d'aspiration (4) puisse être modifiée,
    caractérisé en ce que
    les surfaces (6) sont pivotées de telle manière que, par une rotation de la tubulure d'aspiration (4) dans la direction de rotation de la roue à aubes (2), la distance se trouve réduite.
EP21208695.3A 2018-06-12 2019-06-04 Pompe centrifuge dotée d'un carter de pompe Active EP4001665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU100831A LU100831B1 (de) 2018-06-12 2018-06-12 Kreiselpumpe mit einem Pumpengehäuse
EP19178039.4A EP3581803B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge avec réglage de l'interstice entre couvercle et rouet

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP19178039.4A Division-Into EP3581803B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge avec réglage de l'interstice entre couvercle et rouet
EP19178039.4A Division EP3581803B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge avec réglage de l'interstice entre couvercle et rouet

Publications (2)

Publication Number Publication Date
EP4001665A1 EP4001665A1 (fr) 2022-05-25
EP4001665B1 true EP4001665B1 (fr) 2023-08-23

Family

ID=63113593

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19178039.4A Active EP3581803B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge avec réglage de l'interstice entre couvercle et rouet
EP21208695.3A Active EP4001665B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge dotée d'un carter de pompe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19178039.4A Active EP3581803B1 (fr) 2018-06-12 2019-06-04 Pompe centrifuge avec réglage de l'interstice entre couvercle et rouet

Country Status (5)

Country Link
EP (2) EP3581803B1 (fr)
HU (2) HUE063402T2 (fr)
LU (1) LU100831B1 (fr)
PL (2) PL3581803T3 (fr)
RU (1) RU2707238C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU500240B1 (de) * 2021-06-02 2022-12-02 Wilo Se Abwasserkreiselpumpe zur Tiefabsaugung gesammelten Abwassers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE117218C (fr) * 1900-02-14 1901-02-01
US3499388A (en) * 1967-06-13 1970-03-10 Hale Fire Pump Co Centrifugal pump
FR2290133A6 (fr) * 1973-02-09 1976-05-28 Materiel Processing Internal Pompe centrifuge
FR2681906B1 (fr) * 1991-09-27 1995-01-20 Renault Vehicules Ind Pompe centrifuge pour circuit de liquide de refroidissement de moteur a combustion.
EP1906025A1 (fr) * 2006-09-22 2008-04-02 Frideco AG Pompe centrifuge
RU80519U1 (ru) * 2008-06-04 2009-02-10 Григорий Иванович Егоров Регулируемый центробежный насос
DE102012023734A1 (de) * 2012-12-05 2014-06-05 Wilo Se Kreiselpumpe insbesondere für Abwasser oder Schmutzwasser
MX2018011268A (es) 2016-03-18 2019-02-13 Weir Slurry Group Inc Disposicion de sellado para elementos ajustables de una bomba.

Also Published As

Publication number Publication date
HUE063402T2 (hu) 2024-01-28
RU2707238C1 (ru) 2019-11-25
LU100831B1 (de) 2019-12-12
EP3581803B1 (fr) 2022-03-02
PL4001665T3 (pl) 2023-10-30
HUE058654T2 (hu) 2022-09-28
EP4001665A1 (fr) 2022-05-25
PL3581803T3 (pl) 2022-05-02
EP3581803A1 (fr) 2019-12-18

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