EP2273121B1 - Ensemble de conteneur pour pompe volumétrique - Google Patents

Ensemble de conteneur pour pompe volumétrique Download PDF

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Publication number
EP2273121B1
EP2273121B1 EP10161265.3A EP10161265A EP2273121B1 EP 2273121 B1 EP2273121 B1 EP 2273121B1 EP 10161265 A EP10161265 A EP 10161265A EP 2273121 B1 EP2273121 B1 EP 2273121B1
Authority
EP
European Patent Office
Prior art keywords
container
pump
magnet
container assembly
gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10161265.3A
Other languages
German (de)
English (en)
Other versions
EP2273121A3 (fr
EP2273121A2 (fr
Inventor
Dario Ellero
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.)
Fluid O Tech SRL
Original Assignee
Fluid O Tech SRL
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 Fluid O Tech SRL filed Critical Fluid O Tech SRL
Publication of EP2273121A2 publication Critical patent/EP2273121A2/fr
Publication of EP2273121A3 publication Critical patent/EP2273121A3/fr
Application granted granted Critical
Publication of EP2273121B1 publication Critical patent/EP2273121B1/fr
Active 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0069—Magnetic couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the present finding refers to a container assembly for a volumetric pump, in particular but not exclusively an internal or external gears volumetric pump useable for moving fluids in the automotive industry.
  • volumetric pump is a particular type of pump which exploits volume variation in a chamber to cause suction or pressure on an incompressible fluid.
  • volumetric pumps include rotary pumps of the gear type, wherein the volume variation of the operational chamber is obtained through the rotation of elements, typically two gear wheels which mesh with respect to each other, capable of delimiting variable volume rotating chambers.
  • Gear pumps are widely used in the field of lubrication and generally in all applications wherein the liquid to be transferred is particularly viscous.
  • the so-called internal gear pumps are made with the two gears arranged one inside the other but on staggered axis.
  • a partition assembly separates the two gears by means of a crescent-shaped partition plate.
  • Magnetic drive Transmission of power in gear pumps, usually generated by an electric motor, may occur through the so-called “magnetic drive”.
  • This transmission system provides for the presence of two rings or coaxial magnetic cores, one of which is mounted on the drive shaft and the other on the rotor shaft, i.e. one of the gears of the pump.
  • the magnetic fields of the core mounted on the drive shaft approach those having an identical polarity of the core mounted on the shaft of the rotor and, due to magnetic repulsion, they make it rotate.
  • the most common internal or external gear pumps and the respective systems for transmitting power are enclosed by sealed containers made of metal material, typically stainless steel.
  • the pumping units are required to ensure that the pumped liquid and the vapours thereof do not pollute the surrounding environment in any manner whatsoever.
  • contact between the pumped liquid and the environment must be prevented to avoid triggering chemical and physical reactions such to irreversibly alter the liquid itself within the process.
  • Containers for volumetric pumps of known type are disclosed, for example, in documents WO 2009/029855 A1 and EP 1 878 963 A2. >
  • the volume of the liquid to be pumped may increase due to the freezing of the liquid itself. Failure, by the sealed pump container, to compensate such volume increases may thus damage the internal mechanisms of the pump itself.
  • an object of the present finding is that of providing a container assembly for a volumetric pump, in particular an internal or external gear pump, that is capable of compensating the volume increase due to the freezing of the liquids in the pump itself during the periods of inactivity. Then another object is that of providing a container assembly for a volumetric pump capable of obtaining a solid and stable coupling with the body of the pump, making disassembly thereof impossible without irreversibly damaging at least one component of the pump itself.
  • Another object of the finding is that of realizing a container assembly for a volumetric pump that does not require using screws or other fixing systems, in such a manner to be mounted on site in a simple and quick manner.
  • the container assembly 10 is configured to be mounted on a volumetric pump of the gear type, internal or external, schematically illustrated in figure 4 .
  • the pump comprises, in a per se known manner, a first gear 12, keyed on a first shaft 16, and a second gear 14, keyed on a second shaft 18.
  • the first shaft 16 and the second shaft 18 are on different axes but parallel to each other in such a manner that the first gear 12 may be engaged with the second gear 14. Therefore, during the rotation of the first gear 12 with respect to the second gear 14, disjoining of the teeth of the two gears 12 and 14 causes the suctioning of the liquid into the pump, while rejoining thereof causes the discharge of the liquid itself.
  • the container assembly 10 comprises a first container 26 made of deformable plastic material, capable of at least partly closing the internal 20 and external 22 magnetic cores of the magnet.
  • the container 26 of the magnet is folded on the rear body of the pump by means of the sheet turning method, or through any other method suitable for deforming plastic, in such a manner to make coupling thereof solid and disassembly impossible without irreversibly damaging at least one component of the pump.
  • At least one seal element 28 for example an O-ring, capable of guaranteeing perfect seal between the internal of the pump and the surrounding environment and preventing pollution caused by possible leakage of the pumped liquid and vapours thereof.
  • at least one membrane 30 ( figure 3 ), made using spongy or soft material, easy to compress, and suitable to compensate the volume increase due to possible freezing of the liquid in the pump during the inoperative period.
  • the membrane 30 is firmly fixed coupled between the rear body of the pump and the container 26 in such a manner that, once the various parts are assembled, movement thereof in the pump itself is prevented.
  • the container assembly 10 may also comprise a second container 32 made of deformable plastic material, fixed onto the first container 26 of the magnet and onto the body of the pump by means of any plastic deformation method.
  • the second container 32 is made in form of a pipe or sleeve plastically deformed at one of the ends thereof ( figure 4 ) in such a manner that, due to the particular geometry and the plastic deformation imparted thereto, it is capable of holding all the components of the pump assembled together without requiring using screws or other fixing systems. Due to its elasticity, the second container 32 - made of plastic material - also allows compensating possible volume increases due to the freezing of the liquid contained in the pump during the period of inactivity, recovering the initial configuration upon defreezing without damaging the components of the pump itself in any manner whatsoever.
  • the second container 32 secures the coupling of the various parts of the pump and makes disassembly thereof impossible without irreversibly damaging at least one component.
  • the container assembly for a volumetric pump of the present finding is however susceptible to various modifications and variants, all falling within the same innovative concept; Furthermore, all details may be replaced by technically equivalent elements. In practice, the materials used, as well as shape and dimensions, may vary according to technical requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (7)

  1. Ensemble de conteneur (10) pour une pompe volumétrique à engrenages du type comprenant un premier engrenage (12), calé sur un premier arbre (16), et un deuxième engrenage (14), calé sur un deuxième arbre (18), lesdits premier arbre (16) et deuxième arbre (18) étant sur des axes différents mais parallèles entre eux de manière que le premier engrenage (12) puisse être engagé avec le deuxième engrenage (14), sur le premier arbre (16) étant également calé le noyau magnétique interne (20) d'un aimant formant le système pour transmettre un couple d'un moteur d'entraînement (24) au premier engrenage (12), l'aimant comprenant également un noyau magnétique externe (22), monté coaxialement autour dudit noyau magnétique interne (20) et actionné directement par ledit moteur d'actionnement (24), l'ensemble de conteneur (10) comprenant un premier conteneur (26) réalisé en matériau plastique déformable, capable d'enfermer au moins partiellement lesdits noyaux magnétiques interne (20) et externe (22) de l'aimant, l'ensemble de conteneur (10) étant caractérisé en ce qu'au moins une membrane (30) est agencée entre le corps arrière de la pompe et ledit premier conteneur (26) de l'aimant, ladite membrane (30) étant réalisée en matériau spongieux ou mou, facilement compressible, de manière à compenser l'augmentation de volume due à l'éventuelle congélation du liquide dans la pompe durant la période d'inactivité.
  2. Ensemble de conteneur (10) selon la revendication 1, caractérisé en ce que ledit premier conteneur (26) de l'aimant est plié sur le corps arrière de la pompe par déformation plastique, de manière à bloquer solidement l'accouplement dudit premier conteneur (26) et empêcher le désassemblage de celui-ci sans endommager de manière irréversible au moins un composant de la pompe.
  3. Ensemble de conteneur (10) selon la revendication 1 ou 2, caractérisé en ce qu'au moins un élément d'étanchéité (28) est interposé entre ledit premier conteneur (26) de l'aimant et le corps de la pompe, ledit au moins un élément d'étanchéité (28) étant capable de garantir l'étanchéité entre l'intérieur de la pompe et le milieu environnant et empêcher une pollution provoquée par une éventuelle fuite du liquide pompé et des ses vapeurs.
  4. Ensemble de conteneur (10) selon la revendication 1, caractérisé en ce que ladite membrane (30) est fermement fixée par accouplement entre le corps arrière de la pompe et ledit premier conteneur (26) de l'aimant, de manière qu'un mouvement de ladite membrane (30) dans la pompe soit empêché.
  5. Ensemble de conteneur (10) selon l'une quelconque des revendications précédentes, comprenant en outre un deuxième conteneur (32) réalisé en matériau plastique déformable, fixé sur ledit premier conteneur (26) de l'aimant et sur le corps de la pompe par déformation plastique.
  6. Ensemble de conteneur (10) selon la revendication 5, caractérisé en ce que ledit deuxième conteneur (32) est réalisé sous la forme d'un tube ou manchon déformé plastiquement à ses extrémités de manière que ledit deuxième conteneur (32) soit capable de maintenir tous les composants de la pompe assemblés sans utiliser des vis ou d'autres systèmes de fixation.
  7. Ensemble de conteneur (10) selon la revendication 2 ou 6, caractérisé en ce que ladite déformation plastique est obtenue par le biais d'une méthode de retournement de feuille.
EP10161265.3A 2009-06-08 2010-04-28 Ensemble de conteneur pour pompe volumétrique Active EP2273121B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000188U ITMI20090188U1 (it) 2009-06-08 2009-06-08 Assieme di contenimento per una pompa volumetrica

Publications (3)

Publication Number Publication Date
EP2273121A2 EP2273121A2 (fr) 2011-01-12
EP2273121A3 EP2273121A3 (fr) 2014-07-16
EP2273121B1 true EP2273121B1 (fr) 2016-04-06

Family

ID=42536366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10161265.3A Active EP2273121B1 (fr) 2009-06-08 2010-04-28 Ensemble de conteneur pour pompe volumétrique

Country Status (2)

Country Link
EP (1) EP2273121B1 (fr)
IT (1) ITMI20090188U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20153739A1 (it) * 2015-09-18 2017-03-18 Fluid O Tech Srl Pompa provvista di un sistema di compensazione della pressione interna.
EP3184734B1 (fr) 2015-12-24 2021-08-11 Fluid-O-Tech S.r.l. Ensemble de conteneur pour une pompe
DE102016103051A1 (de) * 2016-02-22 2017-08-24 Gkn Sinter Metals Engineering Gmbh Pumpenanordnung
ITUB201655126U1 (it) 2016-03-02 2017-09-02 Fluid O Tech Srl Assieme di contenimento elastico per una pompa.
FR3052821B1 (fr) 2016-06-20 2018-06-22 Sonceboz Automotive Sa Pompe a fluide motorisee a rechauffement ameliore

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20061372A1 (it) * 2006-07-14 2008-01-15 Renato Colombo Dispositivo di connessione rapida per attuare il collegamento tra un tubo ed un componente in particolare un collettore o una valvola di intercettazione di impianti di distribuzione di liquidi o di gas
WO2009029855A1 (fr) * 2007-08-30 2009-03-05 Micropump.Inc. Procédés pour fabriquer des têtes de pompe avec dégagement interne voulu pour élément rotatif

Also Published As

Publication number Publication date
EP2273121A3 (fr) 2014-07-16
EP2273121A2 (fr) 2011-01-12
ITMI20090188U1 (it) 2010-12-09

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