EP0172102A1 - Multistage pump with dismountable cartridge - Google Patents

Multistage pump with dismountable cartridge Download PDF

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Publication number
EP0172102A1
EP0172102A1 EP85401591A EP85401591A EP0172102A1 EP 0172102 A1 EP0172102 A1 EP 0172102A1 EP 85401591 A EP85401591 A EP 85401591A EP 85401591 A EP85401591 A EP 85401591A EP 0172102 A1 EP0172102 A1 EP 0172102A1
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EP
European Patent Office
Prior art keywords
cartridge
pump
flange
pump according
closing
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.)
Granted
Application number
EP85401591A
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German (de)
French (fr)
Other versions
EP0172102B1 (en
Inventor
Roland Brunel
Jean-Claude Peu
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 Salmson France SAS
Original Assignee
ELECTRO-HYDRAULIQUE SEH Ste
ELECTRO HYDRAULIQUE SEH
Pompes Salmson SAS
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.)
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Publication date
Application filed by ELECTRO-HYDRAULIQUE SEH Ste, ELECTRO HYDRAULIQUE SEH, Pompes Salmson SAS filed Critical ELECTRO-HYDRAULIQUE SEH Ste
Publication of EP0172102A1 publication Critical patent/EP0172102A1/en
Application granted granted Critical
Publication of EP0172102B1 publication Critical patent/EP0172102B1/en
Expired legal-status Critical Current

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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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together

Definitions

  • the present invention relates to a multicellular pump whose hydraulic and mechanical elements are included in a removable cartridge.
  • the present invention relates to a multicellular pump which is mainly characterized by the fact that the hydraulic and mechanical elements of the pump are included in a removable cartridge, on the one hand on the side of the drive shaft, on the other hand on the side of the circuit of the fluid to be pumped.
  • a vertical multicellular pump of the centrifugal type mainly comprising a motor 1 coupled by a device 2 to a hydraulic assembly 3.
  • the pump is mounted on a circuit of pumping fluid mainly comprising a suction line 8 and a discharge line 9.
  • the motor shaft 4 is coupled by means of a coupling device 6 to the shaft 5 of the pump itself.
  • the hydraulic and mechanical elements are contained in several successive stages established along the pump shaft 5.
  • hydraulic element at least one cell like that 7a shown in the figure. It includes a turbine centrifugal 12 and a static part formed by the diffuser 30 and channels 31.
  • mechanical element is meant, for example, the cell 7b which comprises a support 13 and a bearing for guiding the shaft 5, composed of a jacket 14 and d 'a pad 15 secured to the support 13. It is mainly these hydraulic and mechanical elements which are subject to wear or deterioration due to conditions of use which may cause degradation, disturbance or stoppage.
  • the assembly is made in one piece by a plurality of tie rods 17 which attach the lower flange 19 to the rest of the cartridge.
  • the tie rod 17 connects the two end flanges.
  • the cartridge can also take the form of a cartridge 3b, cartridge 3 to which a lantern 2 has been added which allows access to the sealing device 23. It can also be associated with a centering flange 32 of the cartridge 3b on motor 1.
  • the lantern 2 is linked to the upper flange 24 by screws 27 and the centering flange 32 to the lantern 2 by screws 33.
  • the cartridge 3b is therefore mounted on the motor 1 by screws 38.
  • the cartridge To seal the cartridge, it has seals arranged between on the one hand, and on the other hand between the flange 19 and the cartridge body 16.
  • the sealing device 23 makes it possible to avoid pumping up the pumping liquid along the shaft towards the coupling device.
  • the pump is mounted on a pump body of the "in line" type where the suction 8 and discharge 9 ports are aligned and at the same level.
  • the suction pipe 8 of the body pump communicates with a suction flange 10 in communication, at the foot of the shaft 5, with the first hydraulic element 7a.
  • the pumped liquid is sucked up and goes up along the shaft 5 in the succession of stacked cells to finally fall back into an annular channel 11 arranged between the outer casing 16 of the cartridge and the cylindrical surface 26 formed by the stacking of cells .
  • the pumping liquid enters an annular delivery chamber 22 which communicates with the delivery pipe 9.
  • the fixing between the flange 19 and the pump body 20 is carried out by several bolts 18.
  • the coupling device 6 which connects the shaft 5 to the motor shaft 4. Then, in a second step in the case where the cartridge is of the type 3b, the centering flange 32 - motor 1 connections are released by screw operation 33 and lower flange 19 - pump body 20 by screw operation 18. By simple lifting of the motor unit 1 - coupling device 6, it is then possible to release the cartridge 3b which can at that time be sent back for usual repairs or for a simple change of cartridge.
  • the present invention adapts to different forms of pumps, in particular to centrifugal pumps which admit suction and delivery at different levels of the pump.
  • the discharge orifice 9 is returned from the pump body 20 to the upper flange 24. This orifice will be directly in communication with the outlet of the last pumping cell.
  • the annular chamber II at the annular channel and the external envelope 16 are eliminated.
  • the flange 19 and the pump body 20 can be designed to receive a pumping assembly in cartridge or not.
  • This arrangement can be advantageous in the case of low-cost embodiments where the constitution of a pumping unit in cartridge would be too costly.
  • the flange 19 comprises a housing intended to receive the cartridge 3 which has the same diameter D as the housing of the pump housing 20 which carries the bearing.
  • the O-rings 39 and 37 are of the same dimensions.
  • the fixing of the pumping assembly can be ensured without the screws 18 in the absence of the flange 19. In fact, it suffices to rotate the pumping assembly by a determined angle so that the tie rods 17 are screwed directly in place of the screws 18 because the tie rods are in number, dimensions and spacing identical to the screws 18.

Abstract

L'invention concerne une pompe notamment de type verticale multicellulaire dans laquelle les éléments hydrauliques (7a) et mécaniques (7b) sont inclus dans une cartouche (3 ou 3b) qui permet une intervention globale sur la pompe pour changer lesdits éléments mécaniques et hydrauliques.The invention relates to a pump in particular of the vertical multicellular type in which the hydraulic (7a) and mechanical (7b) elements are included in a cartridge (3 or 3b) which allows a global intervention on the pump to change said mechanical and hydraulic elements.

Description

La présente invention concerne une pompe multicellulaire dont les éléments hydrauliques et mécaniques sont inclus dans une cartouche démontable.The present invention relates to a multicellular pump whose hydraulic and mechanical elements are included in a removable cartridge.

Dans l'art antérieur, il est connu de constituer des pompes constituées par un empilement de cellules de pompage. Sur un arbre de pompe commun, plusieurs cellules comportant des éléments hydrauliques et mécaniques sont empilés les uns à la suite des autres. L'ensemble est accouplé à un arbre moteur par un dispositif d'accouplement. En cas de panne ou encore en cas de changement de caractéristiques de pompage, on est contraint de démonter, sur l'installation en place, chacun des éléments de la pompe que l'on doit remplacer. Les temps d'intervention sont longs, coûteux et immobilisent l'installation sans pompage pendant un temps qui peut être important. Afin de porter remède aux inconvénients de l'art antérieur, la présente invention concerne une pompe multicellulaire qui se caractérise principalement par le fait que les éléments hydrauliques et mécaniques de la pompe sont inclus dans une cartouche démontable, d'une part du côté de l'arbre d'entraînement, d'autre part du côté du circuit du fluide à pomper.In the prior art, it is known to constitute pumps constituted by a stack of pumping cells. On a common pump shaft, several cells comprising hydraulic and mechanical elements are stacked one after the other. The assembly is coupled to a motor shaft by a coupling device. In the event of a breakdown or in the event of a change in pumping characteristics, it is forced to dismantle, on the installation in place, each of the elements of the pump that must be replaced. Intervention times are long, expensive and immobilize the installation without pumping for a time which can be significant. In order to remedy the drawbacks of the prior art, the present invention relates to a multicellular pump which is mainly characterized by the fact that the hydraulic and mechanical elements of the pump are included in a removable cartridge, on the one hand on the side of the drive shaft, on the other hand on the side of the circuit of the fluid to be pumped.

D'autres caractéristiques et avantages apparaitront à la lecture de la description et de la figure unique annexée.Other characteristics and advantages will appear on reading the description and the attached single figure.

A la figure on a représenté une pompe multicellulaire verticale du type centrifuge comprenant principalement un moteur 1 accouplé par un dispositif 2 à un ensemble hydraulique 3. La pompe est montée sur un circuit de fluide à pomper comportant principalement une canalisation d'aspiration 8 et une canalisation de refoulement 9. L'arbre moteur 4 est accouplé au moyen d'un dispositif d'accouplement 6 à l'arbre 5 de la pompe elle-même.In the figure there is shown a vertical multicellular pump of the centrifugal type mainly comprising a motor 1 coupled by a device 2 to a hydraulic assembly 3. The pump is mounted on a circuit of pumping fluid mainly comprising a suction line 8 and a discharge line 9. The motor shaft 4 is coupled by means of a coupling device 6 to the shaft 5 of the pump itself.

Les éléments hydrauliques et mécaniques sont contenus dans plusieurs étages successifs établis le long de l'arbre de pompe 5.The hydraulic and mechanical elements are contained in several successive stages established along the pump shaft 5.

Par élément hydraulique, on entend au moins une cellule comme celle 7a représentée à la figure. Elle comporte une turbine centrifuge 12 et une partie statique formée du diffuseur 30 et de canaux 31. Par élément mécanique, on entend par exemple la cellule 7b qui comporte un support 13 et un palier de guidage de l'arbre 5, composé d'une chemise 14 et d'un coussinet 15 solidaire du support 13. Ce sont principalement ces éléments hydrauliques et mécaniques qui sont sujets à usure ou à détérioration dues à des conditions d'emploi pouvant entraîner des dégradations, des perturbations ou des arrêts.By hydraulic element is meant at least one cell like that 7a shown in the figure. It includes a turbine centrifugal 12 and a static part formed by the diffuser 30 and channels 31. By mechanical element is meant, for example, the cell 7b which comprises a support 13 and a bearing for guiding the shaft 5, composed of a jacket 14 and d 'a pad 15 secured to the support 13. It is mainly these hydraulic and mechanical elements which are subject to wear or deterioration due to conditions of use which may cause degradation, disturbance or stoppage.

Dans l'art antérieur, il fallait alors une intervention de démontage complet de la pompe pour procéder à sa remise en état.In the prior art, a complete disassembly intervention of the pump was then required to carry out its repair.

Selon l'invention, la cartouche 3 est constituée essentiellement :

  • - de l'arbre 5 équipé d'un système d'étanchéité 23,
  • - d'un flasque d'extrémité inférieure 19, dit de fermeture,
  • - d'un flasque d'extrémité supérieure 24.
According to the invention, the cartridge 3 essentially consists:
  • - the shaft 5 fitted with a sealing system 23,
  • - a lower end flange 19, said to be closing,
  • - an upper end flange 24.

L'ensemble est rendu monobloc par une pluralité de tirants 17 qui rattachent le flasque inférieur 19 au reste de la cartouche. Ici, le tirant 17 relie les deux flasques d'extrémité. Mais, la cartouche peut prendre aussi la forme d'une cartouche 3b, cartouche 3 à laquelle on a rajouté une lanterne 2 qui pemet d'accéder au dispositif d'étanchéité 23. On peut y associer aussi une bride de centrage 32 de la cartouche 3b sur le moteur 1.The assembly is made in one piece by a plurality of tie rods 17 which attach the lower flange 19 to the rest of the cartridge. Here, the tie rod 17 connects the two end flanges. However, the cartridge can also take the form of a cartridge 3b, cartridge 3 to which a lantern 2 has been added which allows access to the sealing device 23. It can also be associated with a centering flange 32 of the cartridge 3b on motor 1.

La lanterne 2 est liée au flasque supérieur 24 par des vis 27 et la bride de centrage 32 à la lanterne 2 par des vis 33. La cartouche 3b est donc montée sur le moteur 1 par des vis 38.The lantern 2 is linked to the upper flange 24 by screws 27 and the centering flange 32 to the lantern 2 by screws 33. The cartridge 3b is therefore mounted on the motor 1 by screws 38.

Cette constitution permet en particulier des interventions globales sur la pompe en dehors du moteur. Ainsi tout changement de pompe peut être réalisé par un opérateur non spécialisé en une opération sur le site de difficulté technique très simple ne durant que très peu de temps ce qui réduit le coût d'immobilisation de la pompe. On réduit aussi le coût d'intervention. La constitution en une cartouche globale et stockable des éléments hydrauliques et mécaniques permet d'éviter l'usage d'un groupe de secours complet prévu en réserve. On évite aussi la gestion d'un ensemble de pompes compliquée car on n'a plus à gérer un grand nombre de pièces de rechange comme c'était le cas selon l'art antérieur. Il est aussi possible de personnaliser chaque application par un simple changement de cartouche sur le site. Ainsi les impulseurs et les parties fixes peuvent être réalisées aussi bien en matière synthétique qu'en acier inox, par exemple. Les caractéristiques de pompage changent selon le matériau et la forme des éléments hydrauliques et mécaniques.This constitution allows in particular global interventions on the pump outside the engine. Thus any change of pump can be carried out by an operator not specialized in an operation on the site of very simple technical difficulty lasting only a very short time which reduces the cost of immobilizing the pump. We also reduce the cost of intervention. The constitution of a global and storable cartridge of hydraulic and mechanical elements makes it possible to avoid the use of a complete backup group provided in reserve. We also avoid the management of a set of pumps complicated because we no longer have to manage a large number of spare parts as was the case according to the prior art. It is also possible to customize each application by simply changing the cartridge on the site. Thus the impellers and the fixed parts can be made both of synthetic material and of stainless steel, for example. The pumping characteristics change according to the material and the shape of the hydraulic and mechanical elements.

Pour assurer l'étanchéité de la cartouche celle-ci comporte des joints d'étanchéité disposés entre d'une part, et d'autre part entre le flasque 19 et le corps de cartourche 16. Le dispositif 23 d'étanchéité permet d'éviter la remontée du liquide de pompage le long de l'arbre vers le dispositif d'accouplement. Dans l'exemple de réalisation préférée, la pompe est montée sur un corps de pompe du type "in line" où les orifices d'aspiration 8 et de refoulement 9 sont alignés et au même niveau.La canalisation d'aspiration 8 du corps de pompe communique avec un flasque d'aspiration 10 en communication, au pied de l'arbre 5, avec le premier élément hydraulique 7a. Le liquide pompé est aspiré et remonte le long de l'arbre 5 dans la succession de cellules empilées pour finalement retomber dans un canal annulaire 11 disposé entre l'enveloppe extérieure 16 de la cartouche et la surface cylindrique 26 constituée par l'empilement des cellules. Le liquide de pompage pénètre dans une chambre annulaire de refoulement 22 qui communique avec la canalisation 9 de refoulement. La fixation entre le flasque 19 et le corps de pompe 20 est réalisée par plusieurs boulons 18.To seal the cartridge, it has seals arranged between on the one hand, and on the other hand between the flange 19 and the cartridge body 16. The sealing device 23 makes it possible to avoid pumping up the pumping liquid along the shaft towards the coupling device. In the preferred embodiment, the pump is mounted on a pump body of the "in line" type where the suction 8 and discharge 9 ports are aligned and at the same level. The suction pipe 8 of the body pump communicates with a suction flange 10 in communication, at the foot of the shaft 5, with the first hydraulic element 7a. The pumped liquid is sucked up and goes up along the shaft 5 in the succession of stacked cells to finally fall back into an annular channel 11 arranged between the outer casing 16 of the cartridge and the cylindrical surface 26 formed by the stacking of cells . The pumping liquid enters an annular delivery chamber 22 which communicates with the delivery pipe 9. The fixing between the flange 19 and the pump body 20 is carried out by several bolts 18.

Pour la maintenance de la pompe multicellulaire selon l'invention, il est nécessaire dans un premier temps de libérer le dispositif d'accouplement 6 qui lie l'arbre 5 à l'arbre moteur 4. Puis, dans un deuxième temps dans le cas où la cartouche est du genre 3b, on libère les liaisons bride de centrage 32 - moteur 1 par manoeuvre de vis 33 et flasque inférieure 19 - corps de pompe 20 par manoeuvre de vis 18. Par simple levage du bloc moteur 1 - dispositif d'accouplement 6, il est possible alors de dégager la cartouche 3b qui peut être à ce moment là renvoyée pour les réparations d'usage ou pour un simple changement de cartouche.For the maintenance of the multicellular pump according to the invention, it is first necessary to release the coupling device 6 which connects the shaft 5 to the motor shaft 4. Then, in a second step in the case where the cartridge is of the type 3b, the centering flange 32 - motor 1 connections are released by screw operation 33 and lower flange 19 - pump body 20 by screw operation 18. By simple lifting of the motor unit 1 - coupling device 6, it is then possible to release the cartridge 3b which can at that time be sent back for usual repairs or for a simple change of cartridge.

La présente invention s'adapte à différentes formes de pompes en particulier aux pompes centrifuges qui admettent une aspiration et un refoulement en des niveaux différents de la pompe. Dans ce cas, l'orifice de refoulement 9 est renvoyé du corps de pompe 20 au flasque supérieur 24. Cet orifice sera directement en communication avec la sortie de la dernière cellule de pompage. La chambre annulaire Il au canal annulaire et l'enveloppe externe 16 sont supprimées.The present invention adapts to different forms of pumps, in particular to centrifugal pumps which admit suction and delivery at different levels of the pump. In this case, the discharge orifice 9 is returned from the pump body 20 to the upper flange 24. This orifice will be directly in communication with the outlet of the last pumping cell. The annular chamber II at the annular channel and the external envelope 16 are eliminated.

On remarquera à la figure que le flasque 19 et le corps de pompe 20 peuvent être conçus pour recevoir un ensemble de pompage en cartouche ou non. Cette disposition peut être avantageuse dans le cas de réalisations à bas prix où la constitution d'un ensemble de pompage en cartouche serait trop coûteux. En effet, à la figure le flasque 19 comporte un logement destiné à recevoir la cartouche 3 qui a le même diamètre D que le logement du coprs de pompe 20 qui porte le palier. De même, les joints toriques 39 et 37 sont de mêmes dimensions. Ainsi, en l'absence de flasque inférieur 19, il est possible d'adapter l'ensemble de pompage sur le corps de pompe 20. On n'a plus alors la constitution en cartouche mais cette caractéristique permet en particulier de standardiser la fabrication de pompes multicellulaires en cartouches ou non.It will be noted in the figure that the flange 19 and the pump body 20 can be designed to receive a pumping assembly in cartridge or not. This arrangement can be advantageous in the case of low-cost embodiments where the constitution of a pumping unit in cartridge would be too costly. In fact, in the figure, the flange 19 comprises a housing intended to receive the cartridge 3 which has the same diameter D as the housing of the pump housing 20 which carries the bearing. Likewise, the O-rings 39 and 37 are of the same dimensions. Thus, in the absence of a lower flange 19, it is possible to adapt the pumping assembly to the pump body 20. There is then no longer a cartridge construction, but this characteristic makes it possible in particular to standardize the manufacture of multicellular pumps in cartridges or not.

D'autre part, la fixation de l'ensemble de pompage peut être assurée sans les vis 18 en l'absence du flasque 19. En effet, ll suffit de tourner l'ensemble de pompage d'un angle déterminé pour que les tirants 17 viennent se visser directement à la place des vis 18 car les tirants sont en nombre, dimensions et entraxes identiques aux vis 18.On the other hand, the fixing of the pumping assembly can be ensured without the screws 18 in the absence of the flange 19. In fact, it suffices to rotate the pumping assembly by a determined angle so that the tie rods 17 are screwed directly in place of the screws 18 because the tie rods are in number, dimensions and spacing identical to the screws 18.

Enfin, on remarquera que cette caractéristique s'étend aisément à toutes les pompes multicellulaires, même à celles dont les orifices d'aspiration et de refoulement ne sont pas au même niveau.Finally, it will be noted that this characteristic easily extends to all multicellular pumps, even to those whose suction and discharge orifices are not at the same level.

Claims (7)

1. Pompe multicellulaire, caractérisée en ce que les éléments hydrauliques et mécaniques de la pompe sont inclus dans une cartouche démontable (3) d'une part de l'arbre d'entraînement (4), d'autre part du circuit (8, 9) de fluide à pomper.1. Multicellular pump, characterized in that the hydraulic and mechanical elements of the pump are included in a removable cartridge (3) on the one hand of the drive shaft (4), on the other hand of the circuit (8, 9) of fluid to be pumped. 2. Pompe selon la revendication 1, caractérisée en ce que la cartouche (3) comporte un flasque (19) de fermeture maintenu par des tirants (17) solidaire du reste de l'ensemble de pompage et par des vis (18) de fixation de la cartouche sur le corps de pompe (20).2. Pump according to claim 1, characterized in that the cartridge (3) comprises a flange (19) closing maintained by tie rods (17) integral with the rest of the pumping assembly and by screws (18) for fixing of the cartridge on the pump body (20). 3. Pompe selon la revendication 2, caractérisée en ce que la cartouche (3b) comporte aussi une lanterne (2) d'accès à un dispositif d'étanchéité (23) de la cartouche, fixée à un flasque (24) d'extrémité de la cartouche.3. Pump according to claim 2, characterized in that the cartridge (3b) also comprises a lantern (2) for access to a sealing device (23) of the cartridge, fixed to a flange (24) at the end cartridge. 4. Pompe selon la revendication 3, caractérisée en ce que la cartouche (3b) comporte aussi une bride de centrage (32) fixée au moteur (1).4. Pump according to claim 3, characterized in that the cartridge (3b) also comprises a centering flange (32) fixed to the motor (1). 5. Pompe selon la revendication 2, caractérisée en ce que le flasque (19) de fermeture comporte un premier logement destiné à recevoir le reste de la cartouche (3) de même diamètre que le logement du corps de pompe (20) destiné à recevoir le flasque (19) de manière à permettre d'utiliser les mêmes éléments en cartouche qu'en ensemble de pompage à cellules.5. Pump according to claim 2, characterized in that the closing flange (19) comprises a first housing intended to receive the remainder of the cartridge (3) of the same diameter as the housing of the pump body (20) intended to receive the flange (19) so as to allow the same cartridge elements to be used as in the cell pumping assembly. . 6. Pompe selon la revendication 5, caractérisée en ce que la cartouche (3) est muni d'un joint (37) d'étanchéité avec le flasque (19) de fermeture de mêmes caractéristiques que le joint (39) d'étanchéité du flasque (19) de fermeture avec le corps de pompe (20).. 6. Pump according to claim 5, characterized in that the cartridge (3) is provided with a seal (37) with the sealing flange (19) of the same characteristics as the seal (39) of the closing flange (19) with the pump body (20). 7. Pompe selon la revendication 5, caractérisé en ce que les tirants (17) sont disposés en nombre, dimensions et entraxes identiques aux vis (18) afin que, le flasque (19) de fermeture étant supprimé, l'ensemble de pompage soit fixé au corps de pompe (20) après une simple rotation autour de l'axe (5).7. Pump according to claim 5, characterized in that the tie rods (17) are arranged in number, dimensions and spacing identical to the screws (18) so that, the flange (19) closing being removed, the pumping assembly is fixed to the pump body (20) after a simple rotation around the axis (5).
EP85401591A 1984-08-03 1985-08-02 Multistage pump with dismountable cartridge Expired EP0172102B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412336A FR2568636B1 (en) 1984-08-03 1984-08-03 MULTICELLULAR PUMP WITH REMOVABLE CARTRIDGE
FR8412336 1984-08-03

Publications (2)

Publication Number Publication Date
EP0172102A1 true EP0172102A1 (en) 1986-02-19
EP0172102B1 EP0172102B1 (en) 1989-01-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401591A Expired EP0172102B1 (en) 1984-08-03 1985-08-02 Multistage pump with dismountable cartridge

Country Status (4)

Country Link
US (1) US4669956A (en)
EP (1) EP0172102B1 (en)
DE (1) DE3567703D1 (en)
FR (1) FR2568636B1 (en)

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DE4011475C2 (en) * 1990-04-09 1994-11-17 Klein Schanzlin & Becker Ag Pot housing pump
DE4011477C2 (en) * 1990-04-09 1997-04-17 Klein Schanzlin & Becker Ag Lantern
US5232350A (en) * 1991-06-11 1993-08-03 Maytag Corporation Motor driven pump assembly with a protective cover
US5380162A (en) * 1993-06-11 1995-01-10 The United States Of America As Represented By The United States Department Of Energy Split driveshaft pump for hazardous fluids
US6227802B1 (en) 1999-12-10 2001-05-08 Osmonics, Inc. Multistage centrifugal pump
DE10322382A1 (en) * 2003-05-17 2004-12-02 Ksb Aktiengesellschaft Multi-stage centrifugal pump
US7581955B2 (en) * 2004-10-15 2009-09-01 Pathways For Learning Products, Inc. Transitional paper and educational system and method
US20090246039A1 (en) * 2006-01-09 2009-10-01 Grundfos Pumps Corporation Carrier assembly for a pump
US7946810B2 (en) * 2006-10-10 2011-05-24 Grundfos Pumps Corporation Multistage pump assembly
US8172523B2 (en) * 2006-10-10 2012-05-08 Grudfos Pumps Corporation Multistage pump assembly having removable cartridge
EP3085961B1 (en) * 2015-04-20 2020-08-05 Grundfos Holding A/S Multi-stage radial pump
CN104963873B (en) * 2015-07-06 2017-08-08 无锡市新久扬机械制造有限公司 A kind of MODEL VERTICAL MULTISTAGE PUMP being easily installed
CN105987026A (en) * 2015-12-29 2016-10-05 安徽晋煤中能化工股份有限公司 Overhauling device and method for multistage centrifugal pump

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FR2593859A1 (en) * 1986-02-03 1987-08-07 Femmechanika In-line pump casing for automatic priming circulation pumps
GB2186027B (en) * 1986-02-03 1990-02-21 Femmechanika Self-priming rotary pump assembly
FR2661218A1 (en) * 1990-04-24 1991-10-25 Salmson Pompes VERTICAL CENTRIFUGAL PUMP ASSEMBLY.
EP0454529A1 (en) * 1990-04-24 1991-10-30 POMPES SALMSON Société Anonyme à directoire dite: Vertical centrifugal pump module
US5201633A (en) * 1990-04-24 1993-04-13 Pompes Salmson Vertical centrifugal hydraulic pump assembly

Also Published As

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US4669956A (en) 1987-06-02
FR2568636A1 (en) 1986-02-07
EP0172102B1 (en) 1989-01-18
FR2568636B1 (en) 1989-01-06
DE3567703D1 (en) 1989-02-23

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