EP1607629B1 - Schwingankerpumpe - Google Patents

Schwingankerpumpe Download PDF

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Publication number
EP1607629B1
EP1607629B1 EP20040425429 EP04425429A EP1607629B1 EP 1607629 B1 EP1607629 B1 EP 1607629B1 EP 20040425429 EP20040425429 EP 20040425429 EP 04425429 A EP04425429 A EP 04425429A EP 1607629 B1 EP1607629 B1 EP 1607629B1
Authority
EP
European Patent Office
Prior art keywords
vibration pump
gasket
pump according
moving core
duct
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 - Lifetime
Application number
EP20040425429
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English (en)
French (fr)
Other versions
EP1607629A1 (de
Inventor
Cesare Bottura
Vito Marchini
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.)
Olab SRL
Original Assignee
Olab SRL
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Filing date
Publication date
Application filed by Olab SRL filed Critical Olab SRL
Priority to DE200460008596 priority Critical patent/DE602004008596T2/de
Priority to EP20040425429 priority patent/EP1607629B1/de
Publication of EP1607629A1 publication Critical patent/EP1607629A1/de
Application granted granted Critical
Publication of EP1607629B1 publication Critical patent/EP1607629B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor

Definitions

  • the present invention relates to a vibration pump adapted to increase the pressure of a liquid in a duct.
  • vibration pumps are very inexpensive and compact as well as simple in their operating principle and therefore in their manufacture, and this makes them reliable.
  • they are not able to generate high pressures and therefore are generally characterized by relatively modest heads.
  • a composite piston for a vibration pump is shown in US-A-6 554 588 .
  • the most suitable circuit and therefore the one most widely used to generate a magnetic field H, is the circuit constituted by a solenoid with a number N of turns, i.e., a conductor in which the electric current i that flows through it makes a number N of complete turns in the same direction.
  • the magnetomotive force f mm is the product N ⁇ i and indicates that the force associated with the magnetic field is proportional both to the intensity of the current i and to the number N of turns of the solenoid winding.
  • the solenoid has the classic rectilinear shape, the magnetomotive force f mm generated by the current that flows through it acts in the internal axial region of the rectilinear solenoid.
  • a magnetic field is generated which is similar to the one generated by the presence of a pair of magnetic poles N-S, whose orientation depends, in a known manner, on the direction in which the current i flows through the solenoid.
  • the conventional devices that constitute the background art of vibration pumps provide for the presence of a so-called moving core, i.e., an element made of ferromagnetic material, which is arranged inside a rectilinear solenoid as described above and is crossed by a current i.
  • a so-called moving core i.e., an element made of ferromagnetic material, which is arranged inside a rectilinear solenoid as described above and is crossed by a current i.
  • Said moving core is a vector quantity and so is the current i that generates it, if the current i is a direct current, the magnetomotive force f mm is unidirectional, whereas if the current i is a sinusoidal alternating current, the magnetomotive force f mm that it generates is likewise of the sinusoidal alternating type.
  • an alternating current produces a back-and-forth motion of the moving core, and this motion can be conveniently utilized to provide the suction-pressure effect of a vibration pump in which the moving core assumes the function of a suction and delivery piston.
  • Ferromagnetic materials have values of ⁇ r that can reach into the tens of thousands, and therefore the presence of an appropriately selected ferromagnetic material arranged inside the magnetic field H generated by a solenoid increases the value of said induction.
  • One solution adopted in known devices to further increase the effectiveness of the magnetic induction B consists in placing cylindrical bushes of ferromagnetic material proximate to the ends of the solenoid and coaxially to said solenoid. Said magnetic bushes increase the N-S polarization effect of the magnetic field, increasing the traction force that acts on the moving core that can slide inside the solenoid and inside said magnetic bushes. This increases the suction-pressure effect of the pump.
  • fluid flow control means i.e., flow control or on-off valves that alternately control or cut off the intake and the outlet and are arranged respectively near the suction and delivery ducts or are both arranged near just one of the ducts, either the suction duct or the delivery duct, and are also arranged outside the solenoid of the coil.
  • the fluid flow control valves are usually kept in the sealing position by springs that have an appropriately selected rigidity.
  • Some conventional devices use, as intake and delivery valves, mushroom-shaped gaskets mounted on the sealing springs described above. These mushroom gaskets have a hemispherical cross-section, which abuts in order to close the intake or delivery duct, respectively, on a surface that is appropriately step-shaped or otherwise provided with a sharp edge.
  • the need to shape the intake and delivery channels, respectively, with sharp edges introduces a further complication in the design of said device.
  • the fact of having to provide a hemispherical gasket that abuts against a sharp-edged sealing surface further entails the additional disadvantage of making said gasket more exposed to damage; for example, the gaskets can retain the impression of the metallic sealing seat, and if said impression no longer mates exactly with the corresponding seat, for example due to axial misalignments of said gasket, sealing problems can arise.
  • the aim of the present invention is to provide a vibration pump that is capable of eliminating or reducing the drawbacks mentioned above.
  • an object of the present invention is to provide a vibration pump that has no ferromagnetic bushes, at the same time achieving the same function performed by said bushes in increasing magnetic induction.
  • Another object of the present invention is to provide a vibration pump device that is based on the operating principle of electric valves, so that it is possible to provide synergies and economies of scale that can be utilized in industrial production.
  • a vibration pump that comprises a coil of a known type that is provided with a rectilinear solenoid winding of N turns with a longitudinal axis, a suction duct that is coaxial to said longitudinal axis, a delivery duct that is also coaxial to said longitudinal axis, first and second valve means adapted to control the flow of the passing fluid respectively in the suction duct and in the delivery duct, further comprising, inside the coil and coaxially thereto, a moving core made of ferromagnetic material, which comprises a duct of the moving core that is closed at its upper end by an insert provided with an axial duct.
  • the moving core is supported by a sleeve that is made of a non-ferromagnetic material and is also coaxial to the coil, and the core is free to move axially inside the sleeve.
  • the vibration pump according to the present invention is characterized in that it further comprises a fixed core, which is also made of ferromagnetic material and is arranged at one of the ends of the solenoid of the coil and is adapted to increase the magnetic induction of the circuit when the coil is crossed by an electric current i , the fixed core being further capable of acting as a magnetic attraction pole for the moving core, and is further characterized in that the second valve means are arranged inside the moving core.
  • the vibration pump 1 comprises a coil 7, which is constituted by the winding of N turns, which is supplied with a current i , generating a magnetic field H.
  • the coil 7 is preferably constituted by a copper winding, by an armature generally made of galvanized steel, and by insulating parts usually made of plastics, as is known to the person skilled in the art.
  • the coil 7 is preferably keyed or splined and retained by the elastic ring 4 on the sleeve 12, which is made of non-ferromagnetic material, for example brass or plastics, and is screwed onto the suction coupling 2, also made of non-ferromagnetic material.
  • the vibration pump according to the invention has an axial symmetry with respect to the axis of symmetry A of the solenoid, and in particular the flow of liquid occurs in ducts that are coaxial to said axis A.
  • the spacer 13 is provided axially with a central supporting hole 13a and with a plurality of fluid passage holes 13b, which are arranged around the central hole 13a.
  • First valve means are interposed between the suction duct 2b and the spacer 13 inside said spacer 13 and more specifically at the central supporting hole 13a, and are constituted, in the embodiment of Figure 1, by a first gasket 3, preferably made of elastomer, which is umbrella-shaped, with a stem 3a provided with a bulge 3b at its free end. Said stem 3a is inserted in the central supporting hole 13a until it blocks the first gasket 3 in the correct position, which remains set by the interlocking of the bulge 3b.
  • the upper flap 3c of the umbrella-shaped gasket 3 rests on the internal surface of the spacer 13, so as to cover the fluid passage holes 13b.
  • the moving core 9 made of ferromagnetic stainless steel is instead arranged inside the sleeve 12.
  • the moving core 9 is substantially shaped like a hollow cylinder and is provided internally with a chamber or duct 9c.
  • second valve means are provided, which are arranged inside said moving core 9 and are constituted, in the illustrated embodiment, by a second gasket 5, which is fully similar to the first gasket 3.
  • said second gasket is umbrella-shaped, with a stem 5a that ends with a bulge 5b and an upper flap 5c.
  • Said stem 5a is inserted in the supporting hole 9d until it locks the second gasket 5 in the correct closure position, which is defined by the interlocking of the bulge 5b.
  • the upper flap 5c of the umbrella-shaped gasket 5 rests on the inner surface of the moving core 9 so as to cover the fluid passage holes 9a. With this umbrella-like shape of the second gasket 5, when the upper flap 5c rests on the fluid passage holes 9a, passage of the fluid from below above said gasket 5 is prevented. In order to allow the passage of the fluid, the upper flap 5c must rise, leaving the fluid passage holes 9a open.
  • the insert 6 is crossed internally by an axial duct 6a, and in addition to closing in an upward region the moving core 9, acts as a support for a spring 10 preferably made of stainless steel.
  • the sleeve 12 is closed by the fixed core 11, which also acts as a delivery duct, since it is axially provided with the delivery duct 11a.
  • Said spring 10 acts between the insert 6 rigidly coupled to the moving core 9 and the fixed core 11.
  • annular gasket 17 preferably made of PTFE.
  • the coil 7 is of a known type and is fully similar to the coils used for electric valves.
  • the coil 7 When the coil 7 is supplied with AC voltage, it generates a magnetic field that moves, likewise with an alternating motion, the moving core 9.
  • the spring 10 preferably made of stainless steel, is interposed between the moving core 9 and the fixed core 11 and acts along the common axis A of the two cores, contrasting their mutual approach. In this manner, the number of times the moving core 9 is attracted by the fixed core 11 during an operating cycle is doubled, and the spring 10 interposed between the two cores is used to apply the force that mutually spaces said cores.
  • the spring 10 by compressing due to the approach of the moving core 9 to the fixed core 11, reaches a load that exceeds the traction force applied by the magnetic field, it repels the moving core 9, moving it away from the fixed core 11.
  • the operating principle as described above therefore, entails that at every half cycle a transfer of water occurs above the second gasket 5 and in the next half cycle water is transferred or overflowed from this region outside the pump.
  • a double-lip elastomer gasket 8 preferably of the self-lubricated type, is further provided above the spacer 13 and ensures the seal between the stem 9b of the moving core 9 and the chamber 12a that is formed in the part below the sleeve 12, and inside which the spacer 13 is keyed.
  • the double-lip gasket 8 is free to perform a translational motion within the portion of the chamber 12a that is comprised between the stem 9b of the moving core 9 and the spacer 13.
  • the shape, position and mobility described for the double-lip gasket 8 optimize the interplay of pressures that leads to the aspiration of the water in the suction duct 2b and to its compression in the delivery duct 11a.
  • the double-lip gasket 8 prevents the liquid located above the second gasket 5 from flowing back downwardly, flowing in the gap between the moving core 9 and the sleeve 12, while during delivery, when the liquid is transferred from the duct 9c above the second gasket 5, it prevents said liquid from being propelled upwardly, passing outside the moving core 9.
  • the vibration pump described above allows to amplify the effect of the magnetic field generated by the solenoid crossed by current without having to resort to bushes that are coaxial with the sleeve 12. In this manner, the device is smaller, lighter and compact.
  • the fixed core 11 is used both as an element for amplifying the magnetic field and as a delivery duct, again achieving an optimization of weights and dimensions, to the benefit of structural simplicity.
  • umbrella-shaped gaskets are used as valve means and act according to their deformability and shape, which is studied and sized according to the pressure forces involved. This, as mentioned, allows to avoid all the drawbacks noted above and associated with the use of valve means supported by elastic springs, above all the size and sealing problems associated with the choice of the rigidity of the springs and the complication of the design of the regions of the pump against which the gasket abuts, with a consequent simplification of the constructive design of said pump and of its assembly.
  • vibration pump according to the invention uses coils of the type normally used for similar devices, in particular to provide electric valves, and therefore it is possible to associate the production of the device according to the invention with the production of known types of device, providing advantageous economies of scale.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Reciprocating Pumps (AREA)

Claims (13)

  1. Schwingankerpumpe aufweisend eine Spule (7) von bekannter Art, die mit einer N-fachen langgestreckten Elektromagnetwicklung mit einer Längsachse (A) versehen ist, eine Saugleitung (2b), die koaxial zu besagter Längsachse (A) ist, eine Auslassleitung (11a), die ebenfalls koaxial zu besagter Längsachse (A) ist, und erste und zweite Ventilmittel (3, 5), die dazu geeignet sind, die Strömung des durchströmenden Fluids in der Saugleitung (2b) bzw. der Auslassleitung (11a) zu regeln, ferner aufweisend im Inneren besagter Spule (7) und koaxial dazu einen sich bewegenden Kern (9), der aus einem ferromagnetischen Material gefertigt ist, welcher eine Leitung (9c) des sich bewegenden Kerns (9) aufweist, der an seinem oberen Ende durch einen mit einer axialen Leitung (6a) versehenen Einsatz (6) verschlossen ist, wobei besagter sich bewegender Kern (9) durch eine Buchse (12) unterstützt wird, die aus einem nicht ferromagnetischen Material gefertigt ist und ebenfalls koaxial zu besagter Spule (7) ist, wobei besagter sich bewegender Kern (9) sich frei axial im Inneren besagter Buchse (12) bewegen kann, dadurch gekennzeichnet, dass sie ferner einen festen Kern (11) aufweist, der ebenfalls aus ferromagnetischem Material gefertigt ist, der an einem der Enden des Elektromagneten besagter Spule (7) angeordnet ist, und dazu geeignet ist, die magnetische Induktion des Schaltkreises zu erhöhen, wenn besagte Spule von einem elektrischen Strom (i) durchquert wird, wobei besagter fester Kern (11) dazu in der Lage ist, als ein magnetisch anziehender Pol für besagten sich bewegenden Kern (9) zu dienen, und dass besagte zweite Ventilmittel (5) im Inneren besagten sich bewegenden Kerns (9) angeordnet ist.
  2. Schwingankerpumpe nach Anspruch 1, dadurch gekennzeichnet, dass besagte erste Ventilmittel (3) und besagte zweite Ventilmittel (5) durch Dichtungen gebildet sind, die vorzugsweise aus einem Elastomer gefertigt sind und regenschirmartig mit einem Stiel (3a, 5a) und einer oberen Klappe (3c, 5c) sind.
  3. Schwingankerpumpe nach Anspruch 2, dadurch gekennzeichnet, dass jede der ersten und zweiten regenschirmartigen Dichtungen (3, 5) dazu geeignet ist, mit besagtem Stiel (3a, 5a) in eine unterstützende Öffnung (13a, 9d) einzudringen, die speziell jeweils in dem Bereich über besagter Saugleitung (2b) bzw. in dem unteren Bereich besagter Leitung (9c) besagten sich bewegenden Kerns (9) vorgesehen ist, wobei jede besagter regenschirmartiger Dichtungen (3, 5) dazu in der Lage ist, mit besagter oberer Klappe (3c, 5c) derselben eine oder mehrere Fluiddurchlassöffnungen (13b, 9a) der ersten bzw. zweiten Dichtung zu verschließen, die benachbart besagter unterstützender Öffnung (13a, 9d) angeordnet sind.
  4. Schwingankerpumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass jede der ersten und zweiten regenschirmartigen Dichtungen (3, 5) weiter an dem Ende besagten Stiels (3a, 5a) eine Ausbuchtung (3b, 5b) aufweist, die dazu geeignet ist, besagten Stiel (3a, 5a) mit besagter unterstützender Öffnung (13a, 9d) zu koppeln, so dass besagte obere Klappe (3c, 5c) besagte Fluiddurchlassöffnungen (13b, 9a) verschließt, wenn besagte Dichtung in der geschlossenen Stellung ist.
  5. Schwingankerpumpe nach einem der vorhergehenden Ansprüche, wobei besagte Buchse (12) nach oben durch besagten festen Kern (11) geschlossen ist, wobei die Dichtung zwischen besagter Buchse (12) und besagtem festen Kern (11) durch eine Dichtung (17) gesichert ist.
  6. Schwingankerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass besagte Buchse (12) fest mit einem Anschlussansaugstück (2) verbunden ist, durch das besagte Saugleitung (2b) geht, ferner ein fixierter Abstandshalter (13) zwischen besagter Saugleitung (2b) und besagter Buchse (12) vorgesehen ist, wobei besagter Abstandshalter vorzugsweise aus einem Kunststoff oder Messing gefertigt ist, und axial zu besagter unterstützender Öffnung (13a) vorgesehen ist.
  7. Schwingankerpumpe nach Anspruch 6, dadurch gekennzeichnet, dass sie eine Dichtung (8) aufweist, die im Inneren einer Kammer (12a) angeordnet ist, welche in dem unteren Teil besagter Buchse (12) vorgesehen ist und durch besagten Abstandshalter (13) begrenzt ist, wobei besagte Dichtung (8) dazu geeignet ist, eine Dichtung zwischen besagtem Stiel (9b) besagten sich bewegenden Kerns (9) und besagter Kammer (12a) zu bilden.
  8. Schwingankerpumpe nach Anspruch 6, wobei eine O-Ring Dichtung (14) zwischen besagtem Abstandshalter (13) und besagter Buchse (12) vorgesehen ist.
  9. Schwingankerpumpe nach Anspruch 6, wobei eine O-Ring Dichtung (15) zwischen besagtem Abstandshalter (13) und besagtem Ansauganschlussstück (2) vorgesehen ist.
  10. Schwingankerpumpe nach Anspruch 6, dadurch gekennzeichnet, dass besagter Abstandshalter (13) mit besagter erster Dichtung (3) mittels einer ersten Feder (4) verbunden ist.
  11. Schwingankerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass besagte Auslassleitung (11a) im Inneren besagten festen Kerns (11) angeordnet ist.
  12. Schwingankerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Feder (10) aufweist, die zwischen besagtem festen Kern (11) und besagtem Einsatz (6) besagten sich bewegenden Kerns (9) angeordnet ist.
  13. Schwingankerpumpe nach Anspruch 12, dadurch gekennzeichnet, dass sie auf besagter Spule (7) ein Diodenelement aufweist, das dazu in der Lage ist, den Strom (i) gleichzurichten, der die Spule (7) versorgt.
EP20040425429 2004-06-11 2004-06-11 Schwingankerpumpe Expired - Lifetime EP1607629B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200460008596 DE602004008596T2 (de) 2004-06-11 2004-06-11 Schwingankerpumpe
EP20040425429 EP1607629B1 (de) 2004-06-11 2004-06-11 Schwingankerpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040425429 EP1607629B1 (de) 2004-06-11 2004-06-11 Schwingankerpumpe

Publications (2)

Publication Number Publication Date
EP1607629A1 EP1607629A1 (de) 2005-12-21
EP1607629B1 true EP1607629B1 (de) 2007-08-29

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Family Applications (1)

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EP20040425429 Expired - Lifetime EP1607629B1 (de) 2004-06-11 2004-06-11 Schwingankerpumpe

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EP (1) EP1607629B1 (de)
DE (1) DE602004008596T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
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US9816496B2 (en) 2014-04-25 2017-11-14 Sysko Ag Oscillating armature pump with a flux-conducting element

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Publication number Priority date Publication date Assignee Title
IT1392178B1 (it) * 2008-12-10 2012-02-22 Olab Srl Pompa a vibrazione particolarmente per l'erogazione di fluidi incomprimibili a bassa e media viscosita'.
ITMI20120078A1 (it) * 2012-01-25 2013-07-26 Olab Srl Raccordo di uscita particolarmente per pompe a vibrazione.
WO2016139531A1 (en) * 2015-03-05 2016-09-09 Ode S.R.L. Hydraulic vibration pump for coffee machines or beverage vending machines
CN105971838B (zh) * 2016-07-15 2017-11-28 东莞辉奥电器有限公司 一种流体泵
IT201800003064A1 (it) * 2018-02-27 2019-08-27 Elbi Int Spa Pompa a vibrazione con struttura migliorata.
DE102018003509A1 (de) 2018-04-28 2019-10-31 Thomas Magnete Gmbh Elektromagnet und Verfahren zur Herstellung des Elektromagneten
DE102018003507B3 (de) * 2018-04-28 2019-10-24 Thomas Magnete Gmbh Linearwirkendes Elektropumpenaggregat mit einem Balg und Verfahren zum Betrieb desselben
CN116209529A (zh) * 2020-09-24 2023-06-02 安诺维雷韦尔贝里有限公司 双功能高压水射流清洁器

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Publication number Priority date Publication date Assignee Title
CH576692A5 (de) * 1974-05-24 1976-06-15 Lucifer Sa
IT246634Y1 (it) * 1999-04-09 2002-04-09 Ulka Srl Pistone composito per pompa a vibrazione
IT249882Y1 (it) * 2000-11-10 2003-06-05 C E M E Engineering S P A Pompa con valvola a doppio effetto
ITMI20012647A1 (it) * 2001-12-13 2003-06-13 Dellorto Spa Pompa comandata da elettromagnete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9816496B2 (en) 2014-04-25 2017-11-14 Sysko Ag Oscillating armature pump with a flux-conducting element

Also Published As

Publication number Publication date
EP1607629A1 (de) 2005-12-21
DE602004008596T2 (de) 2007-12-27
DE602004008596D1 (de) 2007-10-11

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