EP2617996B1 - Pompe volumétrique - Google Patents

Pompe volumétrique Download PDF

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Publication number
EP2617996B1
EP2617996B1 EP13000028.4A EP13000028A EP2617996B1 EP 2617996 B1 EP2617996 B1 EP 2617996B1 EP 13000028 A EP13000028 A EP 13000028A EP 2617996 B1 EP2617996 B1 EP 2617996B1
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EP
European Patent Office
Prior art keywords
pump
guide sleeve
sleeve
magnetic
section
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
EP13000028.4A
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German (de)
English (en)
Other versions
EP2617996A1 (fr
Inventor
Daniel Kohli
Stephan Kaufmann
Raphael Frey
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.)
KNF Flodos AG
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KNF Flodos AG
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Publication of EP2617996A1 publication Critical patent/EP2617996A1/fr
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Publication of EP2617996B1 publication Critical patent/EP2617996B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids

Definitions

  • the invention relates to a positive displacement pump, in particular a Hubanker- or solenoid positive displacement pump, with a pump head, in which at least one pump chamber is provided with a at least one pump chamber associated pumping membrane which separates the pump chamber of a linear actuator, and with a linear actuator, the a longitudinally displaceably guided magnet armature which acts on the flat side facing away from the pump chamber of the pumping membrane and which is electromagnetically displaceable by means of a coil against a restoring force in a suction stroke.
  • a positive displacement pump in particular a Hubanker- or solenoid positive displacement pump
  • a pump head in which at least one pump chamber is provided with a at least one pump chamber associated pumping membrane which separates the pump chamber of a linear actuator, and with a linear actuator, the a longitudinally displaceably guided magnet armature which acts on the flat side facing away from the pump chamber of the pumping membrane and which is electromagnetically displaceable by means of a coil against a restoring force in a suction stroke
  • Displacement pumps of the type mentioned above which have a pump head in which at least one pump chamber is provided, which can be designed, for example, in the shape of a spherical cap, are already known as reciprocating pump pumps.
  • the at least one pumping space is associated with a pumping diaphragm which separates the pumping space from a lifting drive.
  • the lifting drive has a guided in the longitudinal direction of the armature, which acts on the pump chamber remote from the flat side of the membrane and by means of an electromagnet against a restoring force is displaceable in a suction stroke.
  • the compression spring has the task to perform the pressure stroke.
  • the suction stroke is carried out by means of the force which is built up by the coil of the electromagnet in the magnetic circuit. It is crucial that the magnetic circuit constructed by the electromagnet is optimally guided by the magnetically conductive components of the pump and transmitted to the armature imparting the pumping movement.
  • a coil of the electromagnet interacts with a magnetically conductive magnetic return element.
  • This magnetic return element has at its opposite sides mutually aligned insertion openings, which passes through a guide sleeve, in which the magnet armature is displaceably guided by the, formed by the insulator sleeve portion of the guide sleeve.
  • a section of the guide sleeve formed by a stator is provided in the through-opening facing away from the pump chamber.
  • the guide sleeve and the stator are made of magnetically conductive material and magnetically separated from one another, formed by an insulator sleeve portion of the guide sleeve.
  • the suction stroke of the positive displacement pump according to the invention is carried out by means of the force which is built up by the coil in the magnetic circuit, it is crucial that this magnetic circuit as optimally as possible by the magnetic conductive components of the pump, namely by magnetic return element, guide sleeve, stator and armature, is performed. It is crucial that in addition to the working air gap between the stator and armature only small as possible parasitic air gaps between the individual components arise because they impede the magnetic flux very strong.
  • these air gaps are reduced by means of the guide sleeve consisting essentially of guide sleeve, insulator sleeve and stator, and the magnetic circuit is optimized, at the same time ensuring good guidance of the magnet armature in the section of the guide sleeve formed by the insulator sleeve.
  • the magnetic flux is conducted from the magnetic return element to the magnet armature via the guide sleeve.
  • the magnetic return element, the guide sleeve, the magnet armature and the stator form a magnetic circuit which shifts the magnet armature connected to the diaphragm against the restoring force in the direction of the stator.
  • the armature and its associated membrane is moved by means of the restoring force in the direction of the pump chamber.
  • the magnet armature is guided in the section of the guide sleeve formed by the insulator sleeve.
  • a particularly simple and at the same time efficient embodiment according to the invention provides that at least one pressure spring serves as the restoring force acting on the magnet armature.
  • the at least one compression spring is supported on the guide sleeve. While the compression spring is supported with its one end portion on the guide sleeve, the compression spring engages with its end portion facing away from the guide sleeve on the magnet armature so that it is moved during the pressure stroke in the direction of the pump chamber.
  • stator limits the suction stroke of the armature in the guide sleeve.
  • a particularly advantageous development according to the invention provides that the stroke of the at least one pumping membrane is adjustable, and that the pump has a pump housing in which the guide sleeve is arranged to be adjustable in the longitudinal direction. By an adjusting movement on the guide sleeve in the direction away from the pump chamber direction of the stroke and with him the flow rate of the pump according to the invention can be increased if necessary.
  • a preferred embodiment of the invention provides that the guide sleeve carries at least in a portion of its outer periphery an external thread which meshes with a stationary relative to the pump housing internal thread.
  • the guide sleeve has a preferably designed as a cross-sectional widening sleeve head, which carries the external thread, and that the internal thread is provided on the pump housing and preferably on an intermediate plate of the pump housing is particularly advantageous.
  • the pumping function can be used, it is expedient if the guide sleeve and in particular the insulator sleeve on the inner peripheral side and / or the magnet armature on the outer peripheral side has a friction-reducing sliding layer.
  • this sliding layer is designed as a polymer layer, in particular as a polytetrafluoroethylene or molybdenum disulfide layer.
  • the magnetic return element of the positive displacement pump according to the invention can be designed as, for example, a U-shaped coil bail. But it is also possible that the magnetic return element of the positive displacement pump according to the invention is designed as a magnetically conductive sleeve, which has at its opposite end faces the insertion openings for the guide sleeve.
  • a positive displacement pump 1 is shown in two versions, which is designed as a positive displacement pump.
  • the positive displacement pump 1 according to the Fig. 1 and 2 which is preferably used as a liquid pump, has a pump housing 2, which has a pump head 3, a drive housing 4 and an intermediate plate 5 provided between the drive housing 4 and pump head 3.
  • a pump chamber 6 is provided, which may be configured, for example, as a spherical cap.
  • the pumping space 6 is connected via at least one inlet 26 to a suction channel 27 and via at least one outlet 28 to a pressure channel 29. While a non-return valve 30 located in the suction channel 27 allows suction of the pumped medium in the direction of the pump chamber 6, prevents a provided in the pressure channel 29 Check valve 31, a return flow of the pumped medium back to the pump chamber. 6
  • the pump chamber 6 is associated with a pump diaphragm 7 made of elastic material, which is clamped between the pump head 3 and the intermediate plate 5 and the pump chamber 6 is separated by a linear actuator.
  • the pumping membrane 7 is here designed as a shaped membrane which, in its central region facing the pumping space 6, has an outer contour which is approximately complementary to the pumping space.
  • the lifting drive has a magnet armature 8, which is guided displaceably in the longitudinal direction.
  • the magnet armature 8 acts on the pump chamber 6 facing away from flat side of the pump diaphragm 7.
  • the armature 8 is electromagnetically displaceable by means of a coil 9 against a restoring force in a suction stroke.
  • the coil 9 cooperates with a magnetically conductive magnetic return element 10.
  • the coil 9 of the electromagnet is clasped with the magnetic return element 10, which at its opposite sides 11, 12 aligned insertion openings 13, 14 has.
  • the guide sleeve 16 and the stator 17, made of magnetically conductive material and in particular are made of soft magnetic material are magnetically separated from one another, formed by an insulator sleeve 18 portion of the guide sleeve 15, which insulator sleeve 18 is made of magnetically non-conductive material.
  • The, different magnetic properties having components of the guide sleeve 15, namely the guide sleeve 16, the insulator sleeve 18 and the stator 17 are here by means of an adhesive or welding process, for example by laser welding, concentrically connected.
  • the insulator sleeve 18 has not only the guide sleeve 16 and the stator 17 to connect with each other and at the same time to prevent direct magnetic inference, but in the insulator sleeve 18 and the membrane anchor 8, which carries out the pumping movement and transmits to the pumping diaphragm 7, guided displaceably.
  • the guide sleeve 16 has a slightly larger clear inner diameter relative to the outer circumference of the magnet armature 8, so that the section formed by the guide sleeve 16 in FIG Fig. 3 guide sleeve 15 shown in more detail surrounds the magnet armature 8 with play.
  • the guide sleeve 16 therefore does not guide the armature 8, but instead has the task of conducting the magnetic flux from the magnetic return element 10 to the armature 8.
  • the tolerances between the guide sleeve 16 and the magnet armature 8 are chosen so that the smallest possible air gap between the guide sleeve 16 and the armature 8 is formed, but also enough to prevent direct contact of the guide sleeve 16 with the armature 8. If the baffle 16 were also made of magnetically non-conductive material, the entire material thickness of the baffle 16 would act as an air gap and the magnetic circuit would be much less efficient and less efficient.
  • the stroke of the magnet armature 8 and thus the flow rate of the positive displacement pump 1 is adjustable.
  • the guide sleeve 15 is arranged adjustable in the longitudinal direction in the pump housing 2.
  • the guide sleeve 15 carries at least in a portion of its outer periphery an external thread 19 which meshes with a relative to the pump housing 2 fixed internal thread.
  • the guide sleeve 16 has a sleeve head 20 designed here as a cross-sectional widening, which carries the external thread 19.
  • the cooperating with the external thread 19 internal thread is provided on the pump housing 2 and preferably on the intermediate plate 5 of the pump housing 2.
  • the position of the guide sleeve 15 can be adjusted axially in the pump housing 2.
  • the distance between the armature 8 and the stator 17 can be adjusted.
  • the stroke volume can be varied as needed, which can be generated with the lifting diaphragm 7.
  • a tool engagement surface is provided on the externally accessible and the pump chamber 6 facing away from the front end, which is designed here as a slot 25 for inserting a screwdriver.
  • the suction stroke of the positive displacement pump 1 is carried out by means of the force which is built up by the coil 9 in the magnetic circuit.
  • the magnetically conductive components of the positive displacement pump 1, namely by magnetic return element 10, guide sleeve 16, stator 17 and armature 8 it is crucial that in addition to the stator between 16 and armature. 8 remaining working air gap 21 as small as possible parasitic air gaps between the individual components arise because they impede the magnetic flux very much.
  • the guide sleeve 15 consisting essentially of guide sleeve 16, insulator sleeve 18 and stator 17 and the magnetic circuit is optimized, at the same time ensuring good guidance of the magnet armature 8 in the guide sleeve 15.
  • the magnetic flux is conducted from the magnetic return element 10 to the armature 8.
  • the magnetic return element 10 As soon as the coil 9 is energized, the magnetic return element 10, the guide sleeve 16, the magnet armature 8 and the stator 17 form a magnetic circuit which displaces the magnet armature 8 connected to the pump membrane 7 against the restoring force of a restoring spring 22 in the direction of the stator 17.
  • the armature 8 and its associated pumping membrane 7 is moved by means of the return spring 22 in the direction of the pump chamber 2.
  • the compression spring 22 is supported on the guide sleeve 16.
  • the guide sleeve 16 has, on its end face facing the pump chamber 2, a depression in which the one end region of the pressure spring 22 encompassing the magnet armature 8 is arranged.
  • the magnet armature 8 has at its end region facing the pump chamber 2 an annular flange 23 against which the end region of the compression spring 22 facing the pump chamber 2 abuts or engages.
  • the compression spring 22 presses the magnet armature 8 in a membrane space 24 of the intermediate plate 5.
  • the guide sleeve 16 is a magnetic circuit.
  • the in the Fig. 1 and 2 illustrated embodiments of the positive displacement pump 1 differ only in the embodiment of their magnetically conductive magnetic return element 10.
  • the magnetic return element 10 of in Fig. 1 illustrated positive displacement pump designed as a coil bow, which is configured approximately U-shaped and serving at its opposite sides serving as strap ends 11, 12, the aligned insertion openings 13, 14 has.
  • the magnetic return element 10 is the in Fig. 2 shown displacer 1 and formed, for example, by a round or rectangular pipe section 32, at its opposite end faces in each case an annular disc 33, 34 is provided, wherein the annular openings of these annular discs 33, 34 form the aligned through-openings 13, 14.
  • the guide sleeve 15 in particular in the region of its insulator sleeve 18 on the inner peripheral side and / or the magnet armature 8 on the outer peripheral side have a friction-reducing sliding layer.
  • the sliding layer is configured as a polymer layer, for example as a polytetrafluoroethylene or molybdenum disulfide layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)

Claims (14)

  1. Pompe volumétrique (1) avec une tête de pompe (3) dans laquelle (3) il est prévu au moins une chambre de pompe (6), avec une membrane de pompe (7) associée à ladite au moins une chambre de pompe (6), qui (7) sépare la chambre de pompe (6) d'un entraînement de levage, et avec un entraînement de levage, qui comporte un induit magnétique (8) guidé en mouvement en direction longitudinale, qui (8) agit sur le côté plat de la membrane de pompe (7) détourné de la chambre de pompe (6) et qui (8) est déplaçable par voie électromagnétique au moyen d'une bobine (9) en une course d'aspiration contre une force de rappel et la bobine (9) coopère avec un élément de reflux magnétique (10) et l'induit magnétique est guidé en mouvement à travers la partie d'une douille de guidage (15) formée par une douille isolante (18), qui traverse des ouvertures de passage (13, 14) prévues sur des côtés détournés l'un de l'autre (11, 12) de l'élément de reflux magnétique (10) et l'ouverture de passage (14) détournée de la chambre de pompe (6) est traversée par une partie de la douille de guidage (15) formée par un stator (17), caractérisée en ce que l'ouverture de passage (13) proche de la chambre de pompe (6) est traversée par une partie de la douille de guidage (15) formée par un manchon de guidage (16) et en ce que le manchon de guidage (16) et le stator (17), qui sont fabriqués en un matériau magnétiquement conducteur, sont séparés magnétiquement par une partie de la douille de guidage (15) formée par la douille isolante (18) en un matériau magnétiquement non conducteur.
  2. Pompe selon la revendication 1, caractérisée en ce que le manchon de guidage (16), la douille isolante (18) et le stator (17) de la douille de guidage (15) sont soudés, collés ou assemblés l'un à l'autre d'une manière similaire.
  3. Pompe selon l'une des revendications 1 ou 2, caractérisée en ce que la partie de la douille de guidage (15) formée par le manchon de guidage (16) entoure avec un jeu l'induit magnétique (8).
  4. Pompe selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'au moins un ressort de pression (22) fait office de force de rappel agissant sur l'induit magnétique (8).
  5. Pompe selon l'une quelconque des revendications 1 à 4, caractérisée en ce que ledit au moins un ressort de pression (22) prend appui sur le manchon de guidage (16).
  6. Pompe selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le stator (17) limite la course d'aspiration de l'induit magnétique (8) dans la douille de guidage (15).
  7. Pompe selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la course de levée de ladite au moins une membrane (7) est réglable et en ce que la pompe (1) comporte un corps de pompe (2), dans lequel (2) la douille de guidage (15) est à cet effet disposée de façon déplaçable en direction longitudinale.
  8. Pompe selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la douille de guidage (15) porte, au moins dans une partie de sa périphérie extérieure, un filet extérieur (19) qui engrène avec un filet intérieur stationnaire par rapport au corps de pompe (2).
  9. Pompe selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le manchon de guidage (16) comporte une tête de manchon (20) configurée de préférence comme agrandissement de la section transversale, qui porte le filet extérieur (19) et en ce que le filet intérieur est prévu sur le corps de pompe (2) et de préférence sur une plaque intermédiaire (5) du corps de pompe (2).
  10. Pompe selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la douille de guidage (15) présente, en particulier dans la région de sa douille isolante (18), du côté de la périphérie intérieure et/ou l'induit magnétique (8) porte du côté de la périphérie extérieure, une couche de glissement réduisant le frottement.
  11. Pompe selon la revendication 10, caractérisée en ce que la couche de glissement est réalisée sous la forme d'une couche de polymère, en particulier une couche de polytétrafluoroéthylène ou une couche de disulfure de molybdène.
  12. Pompe selon l'une quelconque des revendications 1 à 11, caractérisée en ce que l'élément de reflux magnétique (10) est réalisé de préférence en forme d'armature de bobine en forme de U.
  13. Pompe selon l'une quelconque des revendications 1 à 11, caractérisée en ce que l'élément de reflux magnétique présente une douille magnétiquement conductrice, qui présente sur ses côtés frontaux détournés l'un de l'autre (11, 12) les ouvertures de passage (13, 14) pour la douille de guidage (15).
  14. Pompe selon la revendication 13, caractérisée en ce que la douille magnétiquement conductrice de l'élément de reflux magnétique (10) est formée par une partie de tube (32), par exemple ronde ou rectangulaire, sur les côtés frontaux détournés l'un de l'autre de laquelle il est chaque fois prévu un disque annulaire (33, 34), dans laquelle les ouvertures annulaires de ces disques annulaires (33, 34) forment les ouvertures de passage (13, 14) alignées l'une avec l'autre.
EP13000028.4A 2012-01-17 2013-01-04 Pompe volumétrique Active EP2617996B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012000676A DE102012000676A1 (de) 2012-01-17 2012-01-17 Verdrängerpumpe

Publications (2)

Publication Number Publication Date
EP2617996A1 EP2617996A1 (fr) 2013-07-24
EP2617996B1 true EP2617996B1 (fr) 2016-09-14

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Application Number Title Priority Date Filing Date
EP13000028.4A Active EP2617996B1 (fr) 2012-01-17 2013-01-04 Pompe volumétrique

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Country Link
US (1) US9341172B2 (fr)
EP (1) EP2617996B1 (fr)
JP (1) JP6099401B2 (fr)
CN (1) CN103206358B (fr)
DE (1) DE102012000676A1 (fr)

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US9341172B2 (en) 2016-05-17
JP6099401B2 (ja) 2017-03-22
US20130183173A1 (en) 2013-07-18
JP2013148083A (ja) 2013-08-01
CN103206358B (zh) 2016-12-28
EP2617996A1 (fr) 2013-07-24
DE102012000676A1 (de) 2013-07-18
CN103206358A (zh) 2013-07-17

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