EP0009449B1 - Bearing for ambivalent centrifugal pump - Google Patents

Bearing for ambivalent centrifugal pump Download PDF

Info

Publication number
EP0009449B1
EP0009449B1 EP79400651A EP79400651A EP0009449B1 EP 0009449 B1 EP0009449 B1 EP 0009449B1 EP 79400651 A EP79400651 A EP 79400651A EP 79400651 A EP79400651 A EP 79400651A EP 0009449 B1 EP0009449 B1 EP 0009449B1
Authority
EP
European Patent Office
Prior art keywords
pump
stop member
motor
centrifugal pump
driven
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.)
Expired
Application number
EP79400651A
Other languages
German (de)
French (fr)
Other versions
EP0009449A1 (en
Inventor
Claude Van Rossem
Jean-Claude Le Dall
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.)
ELECTRO-HYDRAULIQUE SEH Ste
Original Assignee
ELECTRO-HYDRAULIQUE SEH Ste
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 ELECTRO-HYDRAULIQUE SEH Ste filed Critical ELECTRO-HYDRAULIQUE SEH Ste
Publication of EP0009449A1 publication Critical patent/EP0009449A1/en
Application granted granted Critical
Publication of EP0009449B1 publication Critical patent/EP0009449B1/en
Expired legal-status Critical Current

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to centrifugal pumps, in particular those of them which, constituted by a plurality of stackable pump elements driven by an incorporated electric motor, belong to the so-called multicellular type.
  • centrifugal pumps In the construction technique of centrifugal pumps, a distinction is made between pumps intended to operate in air and others capable of pumping a liquid in which they are immersed.
  • the electric motor driving the pump is cooled by the effect of a circulation, usually forced, of the fluid borrowed from the ambient medium: air for the first, the liquid to be pumped for seconds.
  • a centrifugal pump with an electric motor cooled by the pumped fluid is known from British Patent No. 410322. Since it involves conveying a flammable liquid and preventing air from entering the motor, the latter is enclosed in a housing sealed inside the pump body. To cool the bearings of the shaft driven by the motor, these are lubricated by a fluid using an auxiliary pump which feeds a network of pipes connected to the bearings. The construction of this pump is complicated due to the particular arrangement of its motor and its bearings. Such an arrangement is not required in a multicellular type pump for aqueous fluid where the risk of ignition of the fluid is by nature excluded. Also known is a fuel pump described by French patent 2175388 in which the electric motor is cooled by the fuel carried by the pump.
  • the cooling of the fluid and the lubrication of the bearings are carried out using a double wall assembly and a branch in which the fluid circulates in a direction opposite to the fluid conveyed by the pump.
  • a cooling system which is also complicated and expensive is not necessary when it comes to pumping a liquid which is inherently non-flammable, for example an aqueous liquid, as is the case when it is a question of pumping water. water from a pond, river or well.
  • the present invention aims to lower the cost price of such bearings and therefore of centrifugal pumps provided with these bearings.
  • This object has been achieved mainly by using inexpensive materials that do not require final machining, as well as by a judicious arrangement of these bearings allowing effective cooling of these, this arrangement excluding the use of auxiliary cooling means, such as those provided in the prior art mentioned above.
  • the invention provides uti 'lisation bearings each comprising a sleeve driven by a dog clutch, a pad cooperating with a stop carried by a stopper support and said stop being adapted to be driven in rotation and being provided with self-alignment means.
  • the central drive part M comprises an electric motor with a flooded rotor. This rotor is visible at 3, the motor stator is illustrated at 4, the motor windings at '5. In order to avoid a possible short circuit between metallic masses of the rotor and the stator by a pumped liquid which would be conductive, it is planned to isolate them according to the rules of the art.
  • the motor shaft 6 drives the pump elements, by means of the extensions 7, 7 'along the common axis of rotation R'R and on either side of the central drive part.
  • each of the pump parts P and P ′ is constituted by the stack of two pump elements, such as the stacks EP1 and EP2 of the right end of FIG. 1.
  • any pump element such as the stack EP1
  • a wheel capable of turning in a chamber such as the wheel 11 in the chamber 12 of the stack EP1, under the action of a driving driving force from the single engine.
  • the wheels such as the wheel 11, are included coaxially with the pump shaft.
  • the wheels of the various superimposed elements are rigidly assembled together by a dog clutch as has been described in FR-A-2342416.
  • the superimposed wheels are assembled by clutches by means of a fitting of dog teeth with trapezoidal profile eliminating any axial play, as described in the aforementioned patent.
  • the cavities 1'3 'and 13 are individually in communication with the chambers 12' and 12 via the elements 15 'and 15 usually designated each by the term "return channel", the pumped liquid existing in the cavity 13 'is routed along the arrow through the conduit 14 in the cavity 13.
  • the fgiure being of revolution, the circulation of liquids established by the conduit 14 continuously and constitutes a true coolant jacket of the engine.
  • FIG. 2 shows the detail arrangement of a bearing in the embodiment of the invention illustrated by Figure 1.
  • the shaft sleeve is designated by 8, the stop support by 9, the bearing by 10, the stop ring by 29, the O-ring by 19.
  • the stop is constituted by a piece in the form of a ring 29. On the perimeter of large diameter of this ring are hollowed out several notches, in the example described there are three notches at 120 ° relating to the thickness of the ring. On the other hand, the circumferential edge of small diameter of the stop ring 29 is chamfered on one of its planar faces, as is particularly visible in the sectional view of Figure 1.
  • the assembly between the support stop 9 and the shaft sleeve 8 is made by dog clutch.
  • the stop support 9 is made integral with the motor shaft by means of a pin fixing 90 visible in FIG. 1.
  • the O-ring 19 is introduced at the bottom of the low-cut part of the stop support 9.
  • the stop support 9 has on its large diameter periphery three flexible extensions, such as the extension 39 in the shape of a claw or tongue.
  • the abutment ring 29 is threaded, anchoring the flexible tabs in the notches provided, so that the chamfered edge comes to bear on the joint 19.
  • the dog clutch 8-9 is assembled.
  • the stop support 9 rotates the shaft sleeve 8 by dog clutch and by means of the three claws, in retaining tabs, the stop ring 29.
  • any alignment imperfection is erased by the recommended arrangement.
  • the parts: shirt, pad and stopper are made of a material of the ceramic type.
  • the stop support is made of a thermoplastic material of the noryl type, flexible and robust.
  • the recommended solution is economical since the arrangement is self-aligning without requiring machined surfaces with too narrow tolerances. It has the very great advantage of erasing the alignment imperfections or those of surfacing of the parts.
  • the two bearings, front and rear, are both lubricated by the pumped liquid.
  • the abutment face of the bearings has three grooves at 120 °, so as to maintain a constant liquid film, between the friction faces. These grooves are not shown in the figure.
  • Such a pump is designed to be used interchangeably in air: for example, in line, on a pipe, or in the liquid to be pumped in which it is immersed without damage.
  • the liquid to be pumped can for example be pure water or water containing salts or impurities such as to make it electrically conductive.
  • the liquid may be different from water, the adaptation to the liquid to be pumped being within the domain of a person skilled in the art.
  • the example described constitutes an ambivalent pump model of the "amphibious" type operating in both air and water.
  • It can be used to drain water by submerging it at the bottom of a pond, a river, a well, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

La présente invention concerne les pompes centrifuges, en particulier celles d'entre elles qui, constituées par une pluralité d'éléments de pompe empilables entraînés par un moteur électrique incorporé, appartiennent au type dit multicellulaire.The present invention relates to centrifugal pumps, in particular those of them which, constituted by a plurality of stackable pump elements driven by an incorporated electric motor, belong to the so-called multicellular type.

Dans la technique de construction des pompes centrifuges on distingue des pompes destinées à fonctionner dans l'air et d'autres aptes à pomper un liquide dans lequel elles sont immergées.In the construction technique of centrifugal pumps, a distinction is made between pumps intended to operate in air and others capable of pumping a liquid in which they are immersed.

Dans un cas comme dans l'autre le moteur électrique d'entraînement de la pompe est refroidi par l'effet d'une circulation, ordinairement forcée, du fluide emprunté au milieu ambiant: l'air pour les premières, le liquide à pomper pour les secondes.In one case as in the other the electric motor driving the pump is cooled by the effect of a circulation, usually forced, of the fluid borrowed from the ambient medium: air for the first, the liquid to be pumped for seconds.

Mais cette disposition simple limite l'application de la pompe à un usage unique. Il s'ensuit que ces types de pompes sont seulement aptes à fonctionner dans le milieu pour lequel le constructeur les a prévues, cependant il existe pour des usages particuliers des pompes centrifuges non «spécifiques» du milieu ambiant, dans lesquelles le refroidissement du moteur électrique d'entraînement est lié au fluide à pomper et non pas au fluide emprunté au milieu ambiant.However, this simple arrangement limits the application of the pump to single use. It follows that these types of pumps are only able to operate in the environment for which the manufacturer has provided them, however there exist for particular uses non-"specific" centrifugal pumps in the ambient environment, in which the cooling of the electric motor drive is linked to the fluid to be pumped and not to the fluid borrowed from the ambient environment.

Une pompe centrifuge à moteur électrique refroidi par le fluide pompé est connu par le brevet britannique n° 410322. Comme il s'agit de véhiculer un liquide inflammable et de prévenir une entrée d'air dans le moteur, ce dernier est enfermé dans un boîtier étanche disposé à l'intérieur du corps de pompe. Pour refroidir les paliers de l'arbre entraîné par le moteur, ceux-ci sont lubrifiés par un fluide à l'aide d'une pompe auxiliaire qui alimente un réseau de conduites reliées aux paliers. La construction de cette pompe est compliquée du fait de l'agencement particulier de son moteur et de ses paliers. Un tel agencement ne s'impose pas dans une pompe de type multicellulaire pour fluide aqueux où le risque d'inflammation du fluide est par nature exclu. On connait également une pompe à carburant décrite par le brevet français 2175388 dans laquelle le moteur électrique est refroidi par le carburant véhiculé par la pompe. Pour éviter la formation prématurée de bulles de gaz qui perturberaient l'écoulement du carburant, et due à une température trop élevée dans la pompe, le refroidissement du fluide et la lubrification des paliers sont effectués à l'aide d'un montage à double paroi et d'une dérivation dans laquelle le fluide circule dans un sens inverse au fluide véhiculé par la pompe. Un tel système de refroidissement qui est egalement compliqué et coûteux ne s'avère pas nécessaire quand il s'agit de pomper un liquide par nature ininflammable, par exemple un liquide aqueux, comme c'est le cas quand il s'agit de pomper l'eau d'une mare, d'une rivière ou d'un puits.A centrifugal pump with an electric motor cooled by the pumped fluid is known from British Patent No. 410322. Since it involves conveying a flammable liquid and preventing air from entering the motor, the latter is enclosed in a housing sealed inside the pump body. To cool the bearings of the shaft driven by the motor, these are lubricated by a fluid using an auxiliary pump which feeds a network of pipes connected to the bearings. The construction of this pump is complicated due to the particular arrangement of its motor and its bearings. Such an arrangement is not required in a multicellular type pump for aqueous fluid where the risk of ignition of the fluid is by nature excluded. Also known is a fuel pump described by French patent 2175388 in which the electric motor is cooled by the fuel carried by the pump. To avoid the premature formation of gas bubbles which would disturb the flow of fuel, and due to too high a temperature in the pump, the cooling of the fluid and the lubrication of the bearings are carried out using a double wall assembly and a branch in which the fluid circulates in a direction opposite to the fluid conveyed by the pump. Such a cooling system which is also complicated and expensive is not necessary when it comes to pumping a liquid which is inherently non-flammable, for example an aqueous liquid, as is the case when it is a question of pumping water. water from a pond, river or well.

C'est pourquoi la présente invention a pour but d'abaisser le prix de revient de tels paliers et par consequent des pompes centrifuges munies de ces paliers. Ce but a été atteint principalement en utilisant des matériaux peu coûteux ne nécessitant pas d'usinage final, ainsi que par un agencement judicieux de ces paliers permettant un refroidissement efficace de ceux-ci, cet agencement excluant l'utilisation de moyens de refroidissement auxiliaires, tels que ceux prevus dans l'art anterieur mentionné ci dessus.This is why the present invention aims to lower the cost price of such bearings and therefore of centrifugal pumps provided with these bearings. This object has been achieved mainly by using inexpensive materials that do not require final machining, as well as by a judicious arrangement of these bearings allowing effective cooling of these, this arrangement excluding the use of auxiliary cooling means, such as those provided in the prior art mentioned above.

Ainsi, l'invention prévoit l'uti'lisation de paliers comprenant chacun une chemise entraînée par un crabot, un coussinet coopérant avec une butée, portée par un support de butée, et ladite butée étant apte à être entrainée en rotation et étant pourvue de moyens d'auto-alignement.Thus, the invention provides uti 'lisation bearings each comprising a sleeve driven by a dog clutch, a pad cooperating with a stop carried by a stopper support and said stop being adapted to be driven in rotation and being provided with self-alignment means.

Les objets et caractéristiques de la présente invention apparaîtront plus clairement à la lecture de la description suivante d'exemples de réalisation, ladite description étant faite en relation avec les dessins ci-annexés dans lesquels:

  • la figure 1 représente une vue en coupe longitudinale partielle d'une forme de réalisation de la pompe centrifuge ambivalente selon l'invention;
  • la figure 2 représente une vue en perspective de l'agencement de détail du palier avant, tel que signalé en D sur la figure 1.
The objects and characteristics of the present invention will appear more clearly on reading the following description of exemplary embodiments, said description being made in relation to the attached drawings in which:
  • FIG. 1 represents a view in partial longitudinal section of an embodiment of the ambivalent centrifugal pump according to the invention;
  • FIG. 2 represents a perspective view of the detail arrangement of the front bearing, as indicated in D in FIG. 1.

Sur la vue en coupe partielle de la figure 1, dans la pompe 1 incluse en un corps monobloc 2, qui rassemble une partie motrice centrale M, encadrée par deux parties de pompe P' et P.In the partial sectional view of FIG. 1, in the pump 1 included in a one-piece body 2, which brings together a central driving part M, framed by two pump parts P 'and P.

La partie motrice centrale M comprend un moteur électrique à rotor noyé. Ce rotor est visible en 3, le stator du moteur est illustré en 4, les enroulements du moteur en '5. En vue d'éviter un éventuel court-circuit entre masses métalliques du rotor et du stator par un liquide pompé qui serait conducteur il est prévu d'isoler ceux-ci selon les règles de l'art. L'arbre 6 du moteur entraîne les éléments de pompe, par l'intermédiaire des prolongements 7, 7' le long de l'axe de rotation commun R'R et de part et d'autre de la partie motrice centrale.The central drive part M comprises an electric motor with a flooded rotor. This rotor is visible at 3, the motor stator is illustrated at 4, the motor windings at '5. In order to avoid a possible short circuit between metallic masses of the rotor and the stator by a pumped liquid which would be conductive, it is planned to isolate them according to the rules of the art. The motor shaft 6 drives the pump elements, by means of the extensions 7, 7 'along the common axis of rotation R'R and on either side of the central drive part.

Dans la forme de réalisation illustrée par la figure 1 chacune des parties de pompe P et P' est constituée par l'empilage de deux éléments de pompe, tels les empilements EP1 et EP2 de l'extrémité de droite de la figure 1.In the embodiment illustrated in FIG. 1, each of the pump parts P and P ′ is constituted by the stack of two pump elements, such as the stacks EP1 and EP2 of the right end of FIG. 1.

Dans un élément de pompe quelconque, tel l'empilement EP1, on distingue: une roue apte à tourner dans une chambre telle la roue 11 dans la chambre 12 de l'empilement EP1, sous l'action d'une force motrice d'entraînement provenant du moteur unique.In any pump element, such as the stack EP1, there are: a wheel capable of turning in a chamber such as the wheel 11 in the chamber 12 of the stack EP1, under the action of a driving driving force from the single engine.

Les roues, telle la roue 11, sont incluses coaxialement à l'arbre de la pompe. Les roues des différents éléments superposés sont assemblées rigidement entre elles par crabot comme cela a été décrit dans la FR-A-2342416. L'assemblage par crabots des roues superposées est procuré au moyen d'un emmanchement de dents de crabot à profil trapézoïdal éliminant tout jeu axial, ainsi qu'il est décrit dans le brevet précité.The wheels, such as the wheel 11, are included coaxially with the pump shaft. The wheels of the various superimposed elements are rigidly assembled together by a dog clutch as has been described in FR-A-2342416. The superimposed wheels are assembled by clutches by means of a fitting of dog teeth with trapezoidal profile eliminating any axial play, as described in the aforementioned patent.

On distingue dans le corps de pompe en 14 un conduit longitudinal de circulation du fluide de pompage qui met en communication entre elles les cavités avant 13' et arrière 13 des pompes. Dans la réalisation décrite, les conduits sont au nombre de quatre, un seul étant visible sur la figure 1.One distinguishes in the pump body at 14 a longitudinal conduit for circulation of the pumping fluid which places the front cavities 13 ′ and rear 13 of the pumps in communication with each other. In the embodiment described, there are four conduits, only one of which is visible in FIG. 1.

Comme les cavités 1'3' et 13 sont individuellement en communication avec les chambres 12' et 12 par l'intermédiaire des éléments 15' et 15 usuellement désignés chacun par le terme «canal de retour», le liquide pompé existant dans la cavité 13' est acheminé selon la flèche par le conduit 14 dans la cavité 13. La fgiure étant de révolution, la circulation de liquides établie par le conduit 14 en continu et constitue une véritable chemise liquide de refroidissement du moteur.As the cavities 1'3 'and 13 are individually in communication with the chambers 12' and 12 via the elements 15 'and 15 usually designated each by the term "return channel", the pumped liquid existing in the cavity 13 'is routed along the arrow through the conduit 14 in the cavity 13. The fgiure being of revolution, the circulation of liquids established by the conduit 14 continuously and constitutes a true coolant jacket of the engine.

La figure 2 montre l'agencement de détail d'un palier dans la forme de réalisation de l'invention illustrée par la figure 1. Sur ces deux figures les mêmes références numériques désignent le mêmes objets. La chemise d'arbre est désignée par 8, le support de butée par 9, le coussinet par 10, la bague de butée par 29, le joint torique par 19.Figure 2 shows the detail arrangement of a bearing in the embodiment of the invention illustrated by Figure 1. In these two figures the same reference numerals denote the same objects. The shaft sleeve is designated by 8, the stop support by 9, the bearing by 10, the stop ring by 29, the O-ring by 19.

Selon l'invention la butée est constituée par une pièce en forme de bague 29. Sur le pourtour de grand diamètre de cette bague sont creusées plusieurs encoches, dans l'exemple décrit il s'agit de trois encoches à 120° intéressant le épaisseur de la bague. D'autre part, le bord circonférentiel de petit diamètre de la bague de butée 29 est chanfreiné sur l'une de ses faces planes, comme cela est particulièrement visible dans la vue en coupe de la figure 1. L'assemblage entre le support de butée 9 et la chemise d'arbre 8 se fait par crabot. Le support de butée 9 est rendu solidaire de l'arbre moteur au moyen d'une fixation par goupille 90 visible sur la figure 1. Le joint torique 19 est introduit au fond de la partie décolletée du support de butée 9. Le support de butée 9 comporte sur son pourtour de grand diamètre trois prolongements souples, tel le prolongement 39 en forme de griffe ou languette. Au montage, après avoir placé le joint torique en fond du décolletage de de la pièce support de butée, on enfile la bague de butée 29 en ancrant les languettes souples dans les encoches prévues, de manière à ce que le bord chanfreiné vienne en appui sur le joint 19. On assemble le crabot 8-9.According to the invention, the stop is constituted by a piece in the form of a ring 29. On the perimeter of large diameter of this ring are hollowed out several notches, in the example described there are three notches at 120 ° relating to the thickness of the ring. On the other hand, the circumferential edge of small diameter of the stop ring 29 is chamfered on one of its planar faces, as is particularly visible in the sectional view of Figure 1. The assembly between the support stop 9 and the shaft sleeve 8 is made by dog clutch. The stop support 9 is made integral with the motor shaft by means of a pin fixing 90 visible in FIG. 1. The O-ring 19 is introduced at the bottom of the low-cut part of the stop support 9. The stop support 9 has on its large diameter periphery three flexible extensions, such as the extension 39 in the shape of a claw or tongue. During assembly, after placing the O-ring at the bottom of the turning of the abutment support part, the abutment ring 29 is threaded, anchoring the flexible tabs in the notches provided, so that the chamfered edge comes to bear on the joint 19. The dog clutch 8-9 is assembled.

En fonctionnement, le support de butée 9 entraîne en rotation par crabotage la chemise d'arbre 8 et par l'intermédiaire des trois griffes, en languettes de retenue, la bague de butée 29.In operation, the stop support 9 rotates the shaft sleeve 8 by dog clutch and by means of the three claws, in retaining tabs, the stop ring 29.

Comme la bague de butée est constamment maintenue en appui sur le joint torique par son chanfrein et que le joint torique est fait d'un matériau élastomère, toute imperfection d'alignement est effacée par l'agencement préconisé.As the stop ring is constantly supported on the O-ring by its chamfer and the O-ring is made of an elastomeric material, any alignment imperfection is erased by the recommended arrangement.

Dans l'exemple décrit, les pièces: chemise, coussinet et butée sont faites d'un matériau du type céramique. Le support de butée est fait d'un matériau thermoplastique du type noryl, souple et robuste.In the example described, the parts: shirt, pad and stopper are made of a material of the ceramic type. The stop support is made of a thermoplastic material of the noryl type, flexible and robust.

La solution préconisée est économique puisque l'agencement est auto-alignant sans nécessiter des surfaces usinées avec des tolérances trop étroites. Il présente le très grand avantage d'effacer les imperfections d'alignement ou celles de surfaçage des pièces.The recommended solution is economical since the arrangement is self-aligning without requiring machined surfaces with too narrow tolerances. It has the very great advantage of erasing the alignment imperfections or those of surfacing of the parts.

Comme on le voit sur la figure 1, l'agencement du palier arrière est le même que celui du palier avant du moteur, détaillé en D.As seen in Figure 1, the arrangement of the rear bearing is the same as that of the front bearing of the engine, detailed in D.

D'autre part, les deux paliers, avant et arrière, sont lubrifiés l'un et l'autre par le liquide pompé. La face de butée des coussinets comporte trois rainures à 120°, de manière à maintenir un film liquide constant, entre les faces de frottement. Ces rainures ne sont pas représentées sur la figure.On the other hand, the two bearings, front and rear, are both lubricated by the pumped liquid. The abutment face of the bearings has three grooves at 120 °, so as to maintain a constant liquid film, between the friction faces. These grooves are not shown in the figure.

Dans la forme de réalisation décrite, les éléments de pompe empilables sont au nombre de quatre, leur répartition est symétrique de part et d'autre de la partie centrale motrice: deux à l'avant et deux à l'arrière. Une telle disposition est avantageuse pour la répartition des efforts et du poids.In the embodiment described, there are four stackable pump elements, their distribution is symmetrical on either side of the central drive part: two at the front and two at the rear. Such an arrangement is advantageous for the distribution of forces and weight.

Cependant, il est possible de prévoir un nombre impair d'éléments. Par exemple, dans le cas de trois éléments de pompe, on préférera monter un élément d'un côté du moteur et les deux autres à l'autre extrémité plutôt que de les monter tous trois en un même bout d'arbre.However, it is possible to provide an odd number of elements. For example, in the case of three pump elements, it is preferable to mount one element on one side of the motor and the other two at the other end rather than mounting them all at the same end of the shaft.

Une telle pompe est conçue pour être employée indifféremment dans l'air: par exemple, en ligne, sur une canalisation, ou dans le liquide à pomper dans lequel elle est immergée sans dommage.Such a pump is designed to be used interchangeably in air: for example, in line, on a pipe, or in the liquid to be pumped in which it is immersed without damage.

Le liquide à pomper peut être par exemple de l'eau pure ou de l'eau contenant des sels ou des impuretés de nature à la rendre électriquement conductrice.The liquid to be pumped can for example be pure water or water containing salts or impurities such as to make it electrically conductive.

Le liquide peut être différent de l'eau, l'adaptation au liquide à pomper étant du domaine de l'homme de l'art.The liquid may be different from water, the adaptation to the liquid to be pumped being within the domain of a person skilled in the art.

L'exemple décrit constitue un modèle de pompe ambivalent du type «amphibie» fonctionnant aussi bien dans l'air que dans l'eau.The example described constitutes an ambivalent pump model of the "amphibious" type operating in both air and water.

Elle est utilisable pour drainer l'eau en l'immergeant au fond d'une mare, d'une rivière, d'un puits etc.It can be used to drain water by submerging it at the bottom of a pond, a river, a well, etc.

Claims (4)

1. Multiple cell centrifugal pump comprising within a pump casing formed by a single block at least two stackable pump elements which are driven by an electric motor cooled by the circulation of the fluid fed by the pump, in which the stackable pump elements are mounted at the ends of the shaft driven by the motor on either side of said motor, and in which the pump casing includes in the motor section at least one conduit (14) communicating the front cell (13') to the rear cell (1'3) of the pump and being provided for the circulation of the supplied fluid having the function to cool the motor and to lubricate the bearings (D) thereof, and in which each of the bearings (D) of the drive motor includes at least one shaft bushing (8), one bearing shell (10) and a stop member (29), characterized in that
- the shaft bushing (8) is driven by a positive shaft clutch,
- the bearing shell (10) cooperates with the stop member (29) which is carried by a stop retainer (9), and
- the stop member (29) may be rotatably driven and is provided with means for self-alignment.
2. A centrifugal pump according to claim 1, characterized in that the means for self-alignment, with which the stop member (29) is provided, consist in that the annular stop member (29), on the one hand, at its large-diameter circumference has at least three equi-distantly spaced recesses and, on the other hand, at its small-diameter inner periphery is bevelled on one of its flat faces so that said recesses are connected with an identical number of retaining dogs (39), and that the bevel cooperates with a sealing ring (19) against which it will be urged when the annular stop member is rotatably driven by the retaining dogs (39) clamping said stop member.
3. A centrifugal pump according to claim 2, characterized in that the retaining dogs are made of a flexible part comprising at least three tongues disposed at angular spacings of 120 degrees which tongues cooperate with the recesses of said annular stop (29).
4. A centrifugal pump according to claim 3, characterized in that the material of the shaft bushing (8), of the bearing shell (10) and of the stop member (29) is a ceramic material.
EP79400651A 1978-09-22 1979-09-18 Bearing for ambivalent centrifugal pump Expired EP0009449B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7827164 1978-09-22
FR7827164A FR2436898A1 (en) 1978-09-22 1978-09-22 AMBIVALENT CENTRIFUGAL PUMP

Publications (2)

Publication Number Publication Date
EP0009449A1 EP0009449A1 (en) 1980-04-02
EP0009449B1 true EP0009449B1 (en) 1982-05-05

Family

ID=9212906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400651A Expired EP0009449B1 (en) 1978-09-22 1979-09-18 Bearing for ambivalent centrifugal pump

Country Status (4)

Country Link
EP (1) EP0009449B1 (en)
DK (1) DK394179A (en)
ES (1) ES484345A1 (en)
FR (1) FR2436898A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014103A1 (en) * 1980-04-12 1981-10-15 Hermetic-Pumpen Gmbh, 7803 Gundelfingen Pump set with electromotor between two pumps - has fluid passing through motor from first to second pump
CH656677A5 (en) * 1981-11-03 1986-07-15 Ruetschi Ag Pumpenbau Brugg K CANOPY SUBMERSIBLE PUMP.
DE3539883A1 (en) * 1985-09-18 1987-03-26 Hermetic Pumpen Gmbh Self-priming centrifugal pump
GB2244095A (en) * 1990-05-17 1991-11-20 Hwang Cheng Luen Aquarium pump arrangement
EP0566087B1 (en) * 1992-04-14 1997-02-12 Ebara Corporation Pump casing made of sheet metal
JPH08177782A (en) * 1994-12-27 1996-07-12 Ebara Corp Double suction pump
WO2001020168A1 (en) * 1999-09-16 2001-03-22 Gwj Engineering Gbr Turboblower
GB0411040D0 (en) * 2004-05-18 2004-06-23 Weir Pumps Ltd Pump assembly
GB2417523B (en) * 2004-08-23 2009-07-08 Frank Mohn Flatoey As Rotodynamic fluid machine
JP2015089697A (en) * 2013-11-05 2015-05-11 トヨタ自動車株式会社 Vehicular voice recognition apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB410322A (en) * 1933-05-31 1934-05-17 Daniel James Moran Pump assemblies
DE2211675A1 (en) * 1972-03-10 1973-09-13 Pierburg Autogeraetebau Kg UNIT OF ELECTRIC MOTOR AND CELL PUMP FOR FUEL SUPPLY
FR2342416A1 (en) * 1976-02-27 1977-09-23 Materiel Telephonique SELF-PRIMING MULTICELLULAR CENTRIFUGAL PUMP
DE2709673A1 (en) * 1977-03-05 1978-09-07 Licentia Gmbh Bearing cap retained in holder by clamping glass - has radial projections on outer surface extending between clamping glass arms

Also Published As

Publication number Publication date
FR2436898A1 (en) 1980-04-18
DK394179A (en) 1980-03-23
EP0009449A1 (en) 1980-04-02
FR2436898B1 (en) 1982-05-14
ES484345A1 (en) 1980-05-16

Similar Documents

Publication Publication Date Title
EP0009449B1 (en) Bearing for ambivalent centrifugal pump
FR2944838A1 (en) STRUCTURAL IMPROVEMENT OF A NOYE ROTOR PUMP
FR2567957A1 (en) LUBRICANT SCAN SYSTEM, AND GEAR PUMP EQUIPPED WITH THIS SYSTEM
EP2998602A1 (en) Torque transmission module intended for being provided on a transmission of a motor vehicle
FR2922605A1 (en) DEBRAYABLE MODULE FOR A SYSTEM FOR TRANSMITTING A STARTING TORQUE TO AN INTERNAL COMBUSTION ENGINE
FR2594185A1 (en) Radial pump
FR2773381A1 (en) CENTRIFUGAL FUEL PUMP WITH BALANCED WHEEL
EP3502504B1 (en) Torque transmission module intended for being provided on a transmission of a motor vehicle
FR2772842A1 (en) Pump unit without own bearing
FR2657122A1 (en) FUEL PUMP FOR INJECTION SYSTEMS OF EXPLOSION ENGINES.
FR2547621A1 (en) Gear pump or motor with axially pressurised bearing members
FR2798184A1 (en) PROPULSION ENGINE ANGLE RETURN DEVICE CASTER FOR BOAT
FR2767189A1 (en) VISCOUS FLUID TYPE HEAT GENERATOR
FR2911166A1 (en) Magnetic drive pump for conveying e.g. corrosive liquid, has sliding sealing device inserted between front wall and rotor with interposition of supports for compensating misalignment between wall and rotor
EP3713840B1 (en) Submarine vehicle comprising a propulsion chain, and associated method
EP3527412B1 (en) Transmission device for hybrid vehicle
EP3239546B1 (en) Propulsion unit for watercraft including a movable housing and a hydraulic fluid conditioning module
EP0612135A1 (en) Rotating device for a canned motor
FR3112172A1 (en) Dry vacuum pump
FR2665222A1 (en) MOTOR-PUMP GROUP.
FR2508563A1 (en) ELECTRIC MOTOR PUMP WITH ROTOR NOYE
WO2019211540A1 (en) Gear pump for circulating a fluid
FR2564548A1 (en) HYDRODYNAMIC COUPLING DEVICE.
FR2619881A1 (en) Balancing shaft for a reciprocating-piston engine
EP2045184B1 (en) Propeller in a nacelle for a ship

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed
ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): FR IT

REG Reference to a national code

Ref country code: FR

Ref legal event code: CA

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940916

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT