EP2818721B1 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
EP2818721B1
EP2818721B1 EP13173439.4A EP13173439A EP2818721B1 EP 2818721 B1 EP2818721 B1 EP 2818721B1 EP 13173439 A EP13173439 A EP 13173439A EP 2818721 B1 EP2818721 B1 EP 2818721B1
Authority
EP
European Patent Office
Prior art keywords
flange
centrifugal pump
pump according
outer casing
foot part
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.)
Not-in-force
Application number
EP13173439.4A
Other languages
German (de)
English (en)
Other versions
EP2818721A1 (fr
Inventor
Steen Mikkelsen
Brian Lundsted Poulsen
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.)
Grundfos Holdings AS
Original Assignee
Grundfos Holdings AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Grundfos Holdings AS filed Critical Grundfos Holdings AS
Priority to ES13173439T priority Critical patent/ES2727102T3/es
Priority to EP13173439.4A priority patent/EP2818721B1/fr
Priority to CN201480036197.2A priority patent/CN105339668B/zh
Priority to US14/900,766 priority patent/US10082155B2/en
Priority to PCT/EP2014/059977 priority patent/WO2014206638A1/fr
Publication of EP2818721A1 publication Critical patent/EP2818721A1/fr
Application granted granted Critical
Publication of EP2818721B1 publication Critical patent/EP2818721B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal
    • 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
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps

Definitions

  • the invention relates to a centrifugal pump with several pump stages.
  • multi-stage centrifugal pumps are known in which a plurality of pump stages, each consisting of a pump impeller and a surrounding spiral housing, are arranged between a head part and a foot part, wherein the wheels are arranged on a common shaft.
  • head part and foot part, including the pump stages are connected to one another via external tie rods in the form of screws.
  • Such a centrifugal pump typically has four screws, which extend outside along the pump stages.
  • the spiral housing in the pump stages form the outer shell or those in which a liquid return within the housing, typically the foot, takes place, which have an outer shell which forms an annular channel between the outer sides of the spiral housing and the outer shell , via which the delivery fluid flows from the head part to the foot part or optionally also vice versa.
  • Both versions have in common that the screws, with which the head and foot part are clamped, including the pump stages or, where appropriate, the surrounding outer sheath, abut in the region of the head and foot, but have a certain distance in the pump stages.
  • the latter leads to the Temperature of the screws of the pumped liquid and thus also the volute casing or the outer shell can differ significantly, resulting in thermal stresses within the centrifugal pump. Such thermal stresses can lead to premature wear or failure of the pump.
  • Out EP 0 726 397 A1 is a multi-stage centrifugal pump with an outer shell formed from sheet metal, which is defined in a headboard or footboard, in which the outer jacket umhaust not only the pump, but also the engine with. With this construction, the tensile forces acting on the outer jacket are comparatively low.
  • the invention has the object, a multi-stage centrifugal pump in such a way that on the one hand thermal stresses within the pump avoided, but at least reduced and on the other hand, the variety of components in the construction of series with different number of stages is reduced.
  • the centrifugal pump according to the invention has a plurality of pump stages, which are arranged axially between a head part and a foot part. It also has an outer sheath surrounding the pump stages circumferentially. According to the invention, an axial end of the outer shell is fixed to the head part and the other axial end to the foot part of the centrifugal pump, wherein the mechanical connection between the head part and the foot part is formed by the outer shell.
  • the basic idea of the solution according to the invention is therefore to use the outer casing, which is generally present anyway, for clamping the pump stages between the head part and the foot part.
  • the outer jacket thus forms the mechanical connection between the headboard and footboard.
  • the axial ends of the outer sheath are therefore fixed according to the invention, but preferably releasably, indirectly or directly attached to the foot part and the head part. In this way, the otherwise required tie rods can be omitted.
  • the outer jacket is, if this forms the annular return channel within the centrifugal pump, always acted upon by the temperature level of the pumped liquid, so that thermal stresses are largely avoided, since the outer jacket and pump stages and head and foot part always have the same temperature level.
  • the outer shell is suitably formed on the pump stages, ie on the outside of the spiral housing, fitting, in order to produce a heat-conducting connection to this if possible.
  • the outer sheath is radially widened at its axial ends, as this an equally simple and effective attachment is possible, on the other hand, the installation is very simple, since there is a funnel-shaped recording, which allows easy mounting on the outer circumference of the pump stages.
  • Such a widened axial end of the outer jacket is advantageously fastened by means of an overlapping flange on the head part or on the foot part. The widening of such an outer shell formed from sheet metal is simple to manufacture and at the same time enables, in conjunction with the flange fastening, a uniform introduction of force over the entire circumference, which is particularly advantageous.
  • the flange connection is preferably designed so that the connection between the outer shell and the headboard or foot is done both positive and positive.
  • the positive locking gives a high level of security against failure of the connection, whereas the frictional connection ensures that the forces are introduced evenly distributed over the circumference and usually no further securing means against release of the connection must be provided.
  • the axial ends of the outer shell are widened stepwise, so that either only a flange-like, substantially radially extending ring is formed at each end of the outer shell or preferably a real stage, ie, a flange on the Ring subsequent jacket portion which extends substantially parallel to the rest of the outer jacket.
  • a flange-like, substantially radially extending ring is formed at each end of the outer shell or preferably a real stage, ie, a flange on the Ring subsequent jacket portion which extends substantially parallel to the rest of the outer jacket.
  • Such a true step-like design can absorb particularly high tensile forces, even if the radial extent of the flange-like portion is only comparatively small. It is understood that then in the head or in the foot part of the centrifugal pump and in the flange, a corresponding step should be provided to support the respective axial end of the outer shell and to clamp.
  • the flange engaging over the axial end of the outer shell and advantageously designed as an annular loose flange preferably has a first contact surface which bears against the widened axial end of the outer jacket and a second contact surface which bears against the head part or the foot part. A uniform and safe introduction of force into the respective components can take place via these contact surfaces.
  • a fastening of a flange via recesses in the flange are passed through the fastening means with which the flange is fixed to the headboard or on the footboard.
  • this head screws are provided which pass through the recesses in the flange and engage in corresponding threaded holes in the headboard or footboard.
  • the at least two flange portions are formed overlapping at their ends, being provided in the overlap region mutually aligned recesses for the implementation of fastening means.
  • z As with a screw which passes through such recesses in the overlapping area, both the attachment of the flange in this area as well as the attachment of the flange to each other, which is particularly advantageous in terms of the introduction of force of the flange.
  • the flange or the flange parts are advantageously designed as castings. Since they typically require high forces, the flanges or flanges are made of metal, preferably stainless steel.
  • the flange may also be formed from a plurality of flange formed from sheet metal parts, which are reinforced in the region of recesses, ie where the SSbefestist done by preferably also made of sheet metal support parts.
  • sheet metal parts including the support members are advantageously formed as stamped parts and joined together, for example by welding, so they can be produced particularly cost-effectively in mass production and are preferably made of stainless steel.
  • a flange is alternatively provided according to the invention, the determination of the radially expanded portion of the outer shell to a radially projecting and circumferentially extending bead on the head part and / or foot part, by means of a clamping ring, which has a substantially U-shaped cross section and the surrounds the widened part at the end of the outer shell and the bead and defines in this way the outer shell on the bead of the head part or foot part.
  • the encircling bead is advantageously stepped down to the jacket, such that the radially widened end of the jacket can be inserted flush into the step, in order to be able to move a cross-sectionally U-shaped clamping ring to be fixed positively on the bead.
  • a clamping device such as a clamping screw, with which the distance between the ring ends can be changed to each other.
  • Such a clamping ring is first opened so far that it can be pushed over the bead and the flared end of the outer shell, after which the clamping ring is tightened by reducing the distance of the ring ends and this, including the flared end of the outer shell and the bead to this Applies components and thus the outer shell firmly connects to the headboard or footboard.
  • the fastening means with which at least one flange is connected to the head part or the foot part of the centrifugal pump, are advantageously designed as screws, which are arranged in the axial direction and engage in a correspondingly extending threaded bore in the head or foot part.
  • the attachment can also take place by other means, for example via a circumferential cross-sectionally C-shaped clamping ring, which surrounds the flange on the one hand and a corresponding head or foot-side bead on the other hand or via appropriate brackets.
  • the outer shell of the centrifugal pump according to the invention is made of sheet metal, preferably made of stainless steel sheet according to the invention.
  • the centrifugal pump according to the invention is designed so that a fluid inlet of the pump on the head part or the foot part and a fluid outlet of the pump at the head part or the foot part are arranged and that between the outer walls of the pump stages and the outer shell, an annular channel for guiding the conveying fluid is formed.
  • the centrifugal pump is designed as an inline pump.
  • This arrangement also ensures a nearly uniform heat distribution over all components.
  • centrifugal pump 1 is a multi-stage inline pump.
  • the centrifugal pump 1 is intended for upright operation and it has a foot part 2, to which an outer jacket 3 connects at the top, whose upper end is received by a head part 4, which also forms a motor chair for the electric drive motor 5 arranged above.
  • the construction of in Fig. 1 The pump shown corresponds to the basic structure of such vertical multi-stage high-pressure centrifugal pumps of inline design, as they are manufactured and offered for example by the company Grundfos under the type designation CR or CRE.
  • the cast foot part 2 has an integrally formed therewith lower plate 6, which forms the actual foot of the centrifugal pump 1 and with which the centrifugal pump 1 rests on the ground and can be screwed via holes located in the plate 6 with the bottom.
  • the foot part 2 has, moreover, the shape of a cylindrical tube 7 with a vertical axis, which faces away from its opposite two oppositely disposed connecting flanges 8 and 9, one of which forms the suction port and the other the pressure port of the pump 1. Via the suction connection, the liquid to be delivered passes into the foot part 2 and from there successively into the vertically adjoining pump stages, each consisting of a spiral housing and an impeller.
  • the arrangement is such that the output of a lower volute casing is conductively connected to the input of the overlying pump stage and the output of the last, ie uppermost pump stage is connected via an annular channel with the pressure port in the foot part 2.
  • the annular channel is defined by the peripheral sides of the Fig. 1 invisible spiral housing on the one hand and the outer shell 3 cylindrical in this area on the other hand limited.
  • the impellers of all pump stages sit on a common shaft, which depends on the am Head part 4 of the centrifugal pump 1 arranged drive motor 5 is driven.
  • the mechanical connection between the head part 4 and the foot part 2 takes place in the illustrated centrifugal pump 1 via the outer shell 3.
  • the coaxial with the axis of rotation and shaft of the centrifugal pump arranged outer jacket 3 has the shape of a cylindrical tube, but is radially widened stepwise at the axial ends.
  • Such an expansion consists of a flange, radially outwardly extending flange portion 10 and an adjoining parallel to the rest of the outer shell 3 extending annular shell portion 11 of larger diameter than the rest of the jacket 3.
  • the connection between the stepped end portion of the outer shell 3 and the foot part. 2 is based on the Figures 2-4 shown, which show the axial lower end of the outer shell 3, which is connected to the foot part 2. It is understood that the axial upper end of the outer shell 3 and the connection in the head part 4 are correspondingly, but in the illustration rotated by 180 ° upwards, are formed.
  • the radially extending flange portion 10 at the lower end of the outer shell 3 is located at a corresponding radial, ie in the in Fig. 1 shown operating position horizontally disposed annular end face 12 of a cylindrical vertical projection 13 of the foot part 2 at.
  • a circumferential groove 14 is arranged, in which an O-ring 15 is incorporated.
  • the outer peripheral surfaces of the projection 13 and the O-ring 15 form a contact surface with the inside of the shell portion 11 of the outer shell 3 sealingly abuts the projection 13.
  • a loose flange 16 is provided, which consists of two identical flange 17 in the form of flange halves. Each flange 17 engages around the outer shell 3 by about 180 °. The two flange 17 together form a closed ring with a total of six recesses in the form of vertical holes 18. These holes 18 are aligned with underlying provided with internal blind holes blind holes 19 in a cylindrical tube section 20 which is arranged coaxially to the central longitudinal axis of the pump 1 and the interior Range is continued upward through the projection 13.
  • the blind bores 19 are embedded in an annular end face 21, which surrounds the projection 13 radially outwardly.
  • the loose flange 16 formed from the two flange 17 has a stepped in cross section and outwardly an upwardly tapered shape and is reinforced in the bore 18 and equipped with an upwardly flat end face. As in particular the Figures 2 and 3 can be seen, is the loose flange 16 with its flat bottom 22 on the end face 21 of the pipe section 20.
  • the loose flange 16 also has a radial inner side 23, with which it bears against the outside of the jacket section 11.
  • the loose flange 16 has a radially inwardly directed projection 24, with which it engages over the flange portion 10 of the outer shell 3. The underside of this radial projection 24 rests on the upper side of the flange portion 10.
  • the radial inner side of the projection 24 bears against the outer casing 3 with little play.
  • the axially expanded from flange portion 10 and shell portion 11 existing end of the outer shell 3 is thus incorporated between the projection 13 and the loose flange 16 positively and non-positively, so that a uniform application of force over the entire circumference between the foot 2 and outer shell 3 takes place.
  • the attachment of the other axially expanded end of the outer shell 3 on the head part 4 is realized in an analogous manner.
  • the formed from two identical flange halves 17 loose flange 16 has, as Fig. 4 shows, two overlapping in installation position portions 25 and 26, namely an upper portion 25 and a lower portion 26.
  • the upper portion 25, which is respectively disposed at the left-hand end of each flange portion 7 seen from the central longitudinal axis of the pump has in the installed position a Distance to the end face 21, whereas the lower portion 26, which is provided at the right-hand end, flush merges into the flat bottom 22 of the loose flange 16 and fills the space, which forms the upper portion 25 to the end face 21.
  • Both sections 25 and 26 have an axial position in the mounting hole 18, namely the upper portion 25 has a bore 18 a and the lower portion 26 has a bore 18 b, which together form a bore 18.
  • the sections 25 and 26 are in installation position in pairs one above the other, with their holes 18 a and 18 b aligned with the underlying blind hole 19 in the pipe section 20.
  • the flange is fastened with screws 27, the screw heads on the upper side of the flange 16 circumferentially of the bores 18 rest, whereas the stems penetrate the holes 18 and engage in the threaded blind holes 19.
  • the screw 27 and the flange 17 against each other from loosening. This results in a total of an annular and closed loose flange 16th
  • the outer jacket 3 is formed endwise in the same way, but there is a two-piece loose flange 16a is provided, which is composed of two identical flange halves 17a.
  • the flange halves each consist of a semi-annular sheet metal section 28, which in the area the holes 18 is formed reinforced by also consisting of sheet metal support members 29. Both the sheet metal section 28 and the support members 29 are formed as stampings made of stainless steel and welded together for lasting connection.
  • the radially expanded end of the outer shell 3 is fixed by means of the loose flange 16 a by means of fastening screws 27 which are guided through the bores 18.
  • a groove-like axial recess is provided, the outer wall 30 in the area around the holes 18, ie where the support members 29 come to rest, is excluded.
  • the loose flange 16a is therefore within a groove-like recess and is surrounded and supported by the outer groove wall.
  • the O-ring 15 for sealing is arranged in the same manner as in the above-described embodiment.
  • the loose flange consists of a total of six identical flange 17b, which are each secured with a screw 27 in a bore 19 in the end face of the foot part 2.
  • This flange 17b are made as stampings made of sheet metal and particularly inexpensive to manufacture.
  • the radially widened part substantially corresponds to the above-described, ie it is a shell portion 11 is provided which is parallel to the outer shell 3, but has a larger diameter and a flange portion 10, but in this embodiment is not perpendicular to the outer shell, but obliquely thereto.
  • the sealing takes place here in the bead area, and although via an O-ring 15 a, which rests against the inside of the shell portion 11.
  • the attachment of the components via a clamping ring 32 which has an approximately U-shaped cross-sectional shape and the peripheral bead 31 engages positively with the flared end of the outer shell 3.
  • the clamping ring 32 is formed of sheet metal and has two reinforcing wires 33 which are incorporated into the clamping ring 32 and are secured to bearing bodies 34 which can be adjusted by means of two clamping screws 35 in their distance from each other.
  • the clamping screws 35 are adjusted so that the bearing body 34 have a maximum distance, d. H. the clamping ring 32 is clamped and thus can be pushed over the bead 31 and the radially expanded end of the outer shell 3. Subsequently, the clamping screws 35 are tightened until the clamping ring 32, the end of the outer shell 3 and the foot part 2 firmly beyond the bead surrounds and thus integrates the components incorporated therein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (18)

  1. Pompe centrifuge (1) avec plusieurs étages qui sont disposés axialement entre une partie de tête (4) et une partie de pied (2), et avec une enveloppe extérieure (3) qui entoure les étages de pompe sur leur pourtour, une extrémité axiale de l'enveloppe extérieure (3) étant fixée sur la partie de tête (4) et l'autre extrémité axiale étant fixée sur la partie de pied (2), la pompe centrifuge étant formée comme pompe en ligne et étant destinée à un fonctionnement en position verticale, et l'enveloppe extérieure (3) étant adjacente à la partie de pied (2) vers le haut et son extrémité supérieure étant reçue par la partie de tête (4) qui constitue en même temps une assise de moteur pour un moteur d'entraînement disposé au-dessus, caractérisée en ce que l'enveloppe extérieure (3) est réalisée en tôle, en ce que la liaison mécanique entre la partie de tête (4) et la partie de pied (2) est formée par l'enveloppe extérieure (3) et en ce que les extrémités axiales de l'enveloppe extérieure (3) sont évasées de façon étagée.
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce qu'une extrémité axiale évasée de l'enveloppe extérieure (3) est fixée respectivement à la partie de tête (4) et à la partie de pied (2) par une bride (16) la recouvrant.
  3. Pompe centrifuge selon la revendication 2, caractérisée en ce que, par les brides (16), les extrémités axiales de l'enveloppe extérieure (3) sont fixées respectivement à la partie de tête (4) et à la partie de pied (2) par adhésion et par complémentarité de forme.
  4. Pompe centrifuge selon l'une des revendications 2 à 3, caractérisée en ce qu'une bride (16) comprend une première surface de contact (23) et une deuxième surface de contact (22) et en ce que la première surface de contact (23) est accolée à l'extrémité axiale évasée de l'enveloppe extérieure (3) et la deuxième surface de contact (22) est accolée respectivement à la partie de tête (4) ou à la partie de pied (2).
  5. Pompe centrifuge selon l'une des revendications 2 à 4, caractérisée en ce qu'une bride est une bride libre (16) annulaire.
  6. Pompe centrifuge selon l'une des revendications 2 à 5, caractérisée en ce qu'une bride (16) comprend des évidements (18) permettant le passage de moyens de fixation (27).
  7. Pompe centrifuge selon l'une des revendications 2 à 6, caractérisée en ce qu'au moins une bride (16) est constituée par au moins deux parties de bride (17).
  8. Pompe centrifuge selon la revendication 7, caractérisée en ce qu'une bride (16) est formée par au moins deux parties de bride (17) formées de façon identique.
  9. Pompe centrifuge selon la revendication 7 ou 8, caractérisée en ce qu'au moins deux parties de bride (17) se chevauchent à leurs extrémités et comprennent, dans la zone de chevauchement (25, 26), des évidements (18a, 18b) alignés les uns sur les autres pour le passage de moyens de fixation (27).
  10. Pompe centrifuge selon l'une des revendications 7 à 9, caractérisée en ce qu'au moins des parties de la bride (16) sont fabriquées en métal coulé, de préférence en acier inoxydable.
  11. Pompe centrifuge selon l'une des revendications 7 à 9, caractérisée en ce qu'au moins des parties de la bride (16a) sont fabriquées en tôle, lesquelles parties sont renforcées, dans la zone d'évidements (18), par des pièces de support (29) consistant de préférence en tôle.
  12. Pompe centrifuge selon l'une des revendications 2 à 11, caractérisée en ce qu'au moins une bride (16) est vissée à la partie de tête (4) ou à la partie de pied (2) de la pompe centrifuge (1), en direction axiale.
  13. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce qu'il est prévu à la partie de tête (4) ou à la partie de pied (2), un bourrelet (31) périphérique en saillie et en ce que la partie radialement évasée à l'extrémité axiale de l'enveloppe extérieure (3) est fixée sur le bourrelet (31) par une bague de serrage périphérique (32).
  14. Pompe centrifuge selon la revendication 13, caractérisée en ce que la bague de serrage (32) présente une section transversale en forme de U dont les branches viennent en prise, par complémentarité de forme, derrière l'extrémité radialement évasée de l'enveloppe (3), d'une part, et le bourrelet (31) d'autre part.
  15. Pompe centrifuge selon la revendication 13 ou 14, caractérisée en ce que le bourrelet (31) présente une forme étagée, l'extrémité radialement évasée de l'enveloppe (3) étant intégrée en affleurement dans l'étagement.
  16. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que l'enveloppe extérieure (3) est fabriquée en tôle, de préférence en tôle d'acier inoxydable.
  17. Pompe centrifuge selon l'une des revendications précédentes, caractérisée en ce que sont disposées une entrée de fluide de la pompe (1) à la partie de pied (2) ou à la partie de tête (4) et une sortie de fluide de la pompe (1) à la partie de pied (2) ou à la partie de tête et en ce qu'un canal pour acheminer le fluide de transport est formé entre une paroi extérieure des étages de pompe et l'enveloppe extérieure (3).
  18. Pompe centrifuge selon l'une des revendications 1 à 16, caractérisée en ce qu'une entrée de fluide et une sortie de fluide sont disposées à la partie de pied (2) et en ce qu'il est prévu, entre une paroi extérieure des étages de pompe et l'enveloppe extérieure (3), un canal de pression pour acheminer le fluide du côté pression du dernier étage de pompe à la sortie de fluide.
EP13173439.4A 2013-06-24 2013-06-24 Pompe centrifuge Not-in-force EP2818721B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES13173439T ES2727102T3 (es) 2013-06-24 2013-06-24 Bomba centrífuga
EP13173439.4A EP2818721B1 (fr) 2013-06-24 2013-06-24 Pompe centrifuge
CN201480036197.2A CN105339668B (zh) 2013-06-24 2014-05-15 离心泵
US14/900,766 US10082155B2 (en) 2013-06-24 2014-05-15 Centrifugal pump
PCT/EP2014/059977 WO2014206638A1 (fr) 2013-06-24 2014-05-15 Pompe centrifuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13173439.4A EP2818721B1 (fr) 2013-06-24 2013-06-24 Pompe centrifuge

Publications (2)

Publication Number Publication Date
EP2818721A1 EP2818721A1 (fr) 2014-12-31
EP2818721B1 true EP2818721B1 (fr) 2019-02-20

Family

ID=48740871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13173439.4A Not-in-force EP2818721B1 (fr) 2013-06-24 2013-06-24 Pompe centrifuge

Country Status (5)

Country Link
US (1) US10082155B2 (fr)
EP (1) EP2818721B1 (fr)
CN (1) CN105339668B (fr)
ES (1) ES2727102T3 (fr)
WO (1) WO2014206638A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3085961B1 (fr) * 2015-04-20 2020-08-05 Grundfos Holding A/S Pompe centrifuge à plusieurs etages
EP3171033A1 (fr) * 2015-11-19 2017-05-24 Grundfos Holding A/S Pompe centrifuge à étages multiples avec ouverture de carter pour la maintenance d'un piston d'équilibrage de poussée axiale
EP3434909B1 (fr) 2017-07-25 2023-09-27 CIRCOR Pumps North America, LLC Carter de pompe comportant une bride de support et une bride d'aspiration intégrales
IT201800000660A1 (it) * 2018-01-10 2019-07-10 Dab Pumps Spa Assemblato di pompa con carcassa perfezionata di alloggiamento del motore elettrico
IT201800003390A1 (it) * 2018-03-09 2019-09-09 Dab Pumps Spa Assemblato di elettropompa centrifuga con tenuta perfezionata
DE102018217927A1 (de) * 2018-10-19 2020-04-23 Robert Bosch Gmbh Hydraulikaggregat
EP3670919A1 (fr) * 2018-12-20 2020-06-24 Grundfos Holding A/S Ensemble de pompe
CN112768337B (zh) * 2020-12-25 2023-12-22 上海三井光中真空设备股份有限公司 一种离子泵抽口结构
BE1031161B1 (de) * 2022-12-20 2024-07-15 Wilo Se Kreiselpumpe und Verfahren zum Herstellen einer Kreiselpumpe

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DE1015692B (de) * 1953-09-01 1957-09-12 Pleuger & Co Elektromotorisch angetriebene mehrstufige Tauchkreiselpumpe
US3051090A (en) * 1960-08-04 1962-08-28 Worthington Corp Segmented casing for multistage centrifugal fluid machines
DE1275866B (de) * 1963-06-11 1968-08-22 Klein Schanzlin & Becker Ag Mehrstufige doppelflutige Unterwasser-Kreiselpumpe in Gliederbauart, insbesondere Bohrlochpumpe
US4234290A (en) * 1978-11-30 1980-11-18 Binks Manufacturing Company Turbine pump
US4307995A (en) * 1980-02-01 1981-12-29 Rockwell International Corporation Vaneless multistage pump
DE3523599A1 (de) 1985-07-02 1987-01-15 Blum Albert Pumpenaggregat
US5071317A (en) * 1990-06-04 1991-12-10 Alan Leach Centrifugal pump having a unitary one-piece diffusion casing and a unitary one piece turbine impeller unit
US5888053A (en) 1995-02-10 1999-03-30 Ebara Corporation Pump having first and second outer casing members
JP3986317B2 (ja) 2002-01-21 2007-10-03 株式会社荏原製作所 多段ポンプ
EP2112380A1 (fr) 2008-04-21 2009-10-28 DP Industries B.V. Pompe centrifuge en plusieurs étages en construction en ligne
CN201568310U (zh) 2009-09-11 2010-09-01 上海凯泉泵业（集团）有限公司 不锈钢桶形卧式多级离心泵
US8763704B2 (en) * 2010-12-22 2014-07-01 Nexen Energy Ulc High pressure hydrocarbon fracturing on demand method and related process

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Also Published As

Publication number Publication date
US20160153469A1 (en) 2016-06-02
WO2014206638A1 (fr) 2014-12-31
CN105339668A (zh) 2016-02-17
CN105339668B (zh) 2018-04-03
US10082155B2 (en) 2018-09-25
ES2727102T3 (es) 2019-10-14
EP2818721A1 (fr) 2014-12-31

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