EP2122167B1 - Motopompe hydraulique-électromagnétique à piston flottant - Google Patents

Motopompe hydraulique-électromagnétique à piston flottant Download PDF

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Publication number
EP2122167B1
EP2122167B1 EP07723275A EP07723275A EP2122167B1 EP 2122167 B1 EP2122167 B1 EP 2122167B1 EP 07723275 A EP07723275 A EP 07723275A EP 07723275 A EP07723275 A EP 07723275A EP 2122167 B1 EP2122167 B1 EP 2122167B1
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EP
European Patent Office
Prior art keywords
piston
motor pump
magnetic
bushing
pump according
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
EP07723275A
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German (de)
English (en)
Other versions
EP2122167A1 (fr
Inventor
Marta Cassola
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.)
Ceme SpA
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Ceme SpA
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Priority to PL07723275T priority Critical patent/PL2122167T3/pl
Publication of EP2122167A1 publication Critical patent/EP2122167A1/fr
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Publication of EP2122167B1 publication Critical patent/EP2122167B1/fr
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    • 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
    • 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
    • F04B17/044—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 using solenoids directly actuating the piston

Definitions

  • the present invention refers to a motor pump of the hydraulic-electromagnetic type with floating piston.
  • the present invention refers to a motor pump of the hydraulic-electromagnetic type with floating piston, particularly suitable for the use in the fluid motion, especially water.
  • This type of motor pumps is applied to various apparatuses such as irons, electric coffee machines, steam generators, irrigation systems and also in the automotive industry.
  • EP1205663 discloses a motor pump of the hydraulic-electromagnetic type with floating piston having the features of the preamble of claim 1.
  • the operation of said motor pumps is based on the presence of a coil that cooperates with a couple of magnetic bearings; the coil is electrically powered and causes the axial movement of the floating piston or delivery piston with an alternate motion.
  • the coil is placed outside the body of the motor pump, while the magnetic bearings are positioned in an annular seat formed between the same coil and a sleeve housing said piston.
  • Said piston is elastically supported by opposite helical springs that are alternatively compressed during the floating in order to allow the passage of the fluid from the inlet duct to the delivery one.
  • Known valves, rings and rubber gaskets associated to the piston and to the relevant sleeve assure the seal of the fluid moving inside the body of the motor pump.
  • an object of the present invention is to remove the above-mentioned drawbacks.
  • object of the present invention is the provision of a motor pump of the hydraulic-electromagnetic type as specified in claim 1 with floating piston wherein the pressure level of the delivery fluid can be increased without oversizing the coil with a subsequent increase of its dimensions and production costs.
  • a further object of the present invention is to provide a motor pump of the above-mentioned type that can guarantee a high resistance and reliability level in time and it is easily manufactured.
  • an object of the present invention relies in providing a motor pump with enhanced magnetic efficiency, or in other words in providing a pump with better performance with minimum magnetic material employment.
  • the present invention is intended to provide for a motor pump wherein operating noise is minimized.
  • the motor pump of the present invention marked in its whole with 10 in Figure 2 , comprises: an inlet duct 44'; an opposite outlet duct 36; a container body 12 which is partly delimited, in its external part, by a coil 14; a couple of opposite magnetic bearings 46, 46' that are spaced between them and placed between the body 12 and the coil 14; a delivery piston 16 that is placed in the body 12, slides in it and it is elastically supported by a front helical spring 20 and by a rear helical spring 20'.
  • a seal valve 24 of the delivery piston 16 is commonly placed.
  • the seal valve 24 cooperates with a support bearing 28 and with a rubber gasket 30 that is elastically tensioned by a further helical spring 32.
  • the spring 32 and, partly, the rubber gasket 30 are housed inside a seat of the delivery duct 22 whose diameter is fit to house the ensemble formed by the rubber gasket 30 and by the helical spring 32 and it is generally higher than the one of the outlet duct or hole 36 of the delivery duct 22.
  • a locking ring 38 having a flanged configuration and engaging with a matching part (e.g. via a snap-on fitting or the like) that is threaded in the outer part of the container body 12 is put on said duct 22.
  • the tubular-shaped container body 12 comprises a front part with a higher diameter that faces the outlet duct 36; an adjacent intermediate part with a lower diameter than the one of the front part itself delimiting the sliding axial chamber of the piston 16 and a terminal part 44 whose diameter is lower than the one of the intermediate part that defines the inlet duct 44'.
  • the opposite magnetic bearings 46 and 46' that may be mutually spaced with the use of a spacing element if necessary, are fit on the external side surface of the intermediate part of the body 12; the coil 14 is in its turn fit on the body 12 so that it can comprise bearings 46, 46'.
  • the coil 14 is stabilized with means that are for instance made of a shaped elastic ring that matches with a face of the coil and a shoulder placed on the body 12 between the front part and the intermediate part with a lower diameter that matches with the opposite face.
  • a magnetic bushing 52 preferably made of steel with a low magnetic residual content, is advantageously placed inside the container body 12 in the central-lower part facing the inlet duct 44'.
  • the magnetic bushing 52 presents an upper tapered portion 52' facing the delivery piston 16 in operative conditions; at the same time, the delivery piston 16 presents a tapered lower inner portion 16'.
  • the lower inner portion 16' is counter-shaped to said upper tapered portion 52': this is evident in figure 2 , wherein it is shown that the slopes of the two mutually facing tapered portions are equal.
  • the external side surface of said magnetic bushing 52 has differentiated diameters and defines a rear area that faces the duct 44' with a diameter that is equal or slightly lower than the internal one of the intermediate part of the body 12 and an adjacent front area facing the outlet hole or duct 36 with a lower diameter.
  • the rear area and the front area of the magnetic bushing 52 form a matching shoulder for the rear spring 20', and the lower end of the magnetic bushing 52 matches with the body 12 in the intermediate part near the narrowing of the terminal part 44 that defines the inlet duct 44'.
  • the axial sliding return of the piston 16 is obtained by means such as the couple of helical springs 20 and 20' previously described that cooperate with the piston.
  • Powering of the coil 14 is obtained, for example, by a couple of electric connections of the fast-on type.
  • the motor pump object of the present invention is highly efficient thanks to the presence of the magnetic bushing 52: more in detail, the magnetic bushing 52, that is aligned with the sliding axis of the piston 16 with one of its ends, is located close to the piston (and therefore at a lower distance between the latter and one of the two magnetic bushings 46, 46'), so it can be dynamically placed in the position reached by the piston 16 during the loading of the rear spring 20' (generally near the terminal part 44 of the body 12).
  • the interaction between the bushing 52 and the two bearings 46, 46' creates a magnetic field whose intensity is higher than the one of the two bearings 46, 46' only and it therefore increases the magnetic attraction force exerted on the piston 16 and the one exerted on the fluid going out of the delivery duct 22.
  • the magnetic bushing 52 is preferably made of steel with a low magnetic residual content.
  • the motor pump may also comprise spacer means operatively acting between the delivery piston 16 and the magnetic bushing 52, so as to keep a minimum non-zero distance between the piston 16 and the bushing 52 during oscillatory motion of the piston 16 itself.
  • the presence and function of the just cited spacer means is directed to avoid mutual contact of the piston 16 and of the bushing 52 during the highfrequency oscillation of the piston 16: by avoiding such repeated contact, a significant noise suppression during motor pump operation is achieved.
  • the spacer means may be realized in many ways, provided that they fulfill the just described technical task: for example, the spacer means may comprise the rear spring 20' (whose elastic constant may be suitably chosen) and/or means for imparting a predetermined pre-load to the rear spring 20' itself.
  • the distance between the piston 16 and the bushing 52 may be measured at correspondingly coaxial points on the sloped/tapered surface, or it may be measured between two coaxial points located on the central portion of the facing surfaces of the piston 16 and of the bushing 52.
  • the spacer means may be set into operation independently from the shape of the piston 16 and/or of the bushing 52; more in particular, the just described spacer means may be present in a motor pump even if the lower inner portion 16' and/or the upper tapered portion 52' are not present.
  • the invention achieves significant advantages.
  • the peculiar geometry of the just cited tapered portions allows a better interfacing of the mobile parts of the pump (with respect to the "fixed” parts), and thereby reduces mechanical stresses and wearing.
  • the motor pump manufactured according to the above description does not imply impediments or additional costs caused by the size increase of the coil and of the relevant wiring coils, while the magnetic bushing 52 can be easily obtained and installed at a low cost.

Claims (10)

  1. Motopompe (10) du type hydraulique-électromagnétique à piston flottant, comprenant :
    - un corps de récipient (12) partiellement délimité, sur la partie extérieure, par une bobine (14) ;
    - un conduit d'amenée (44') et, en face, un conduit d'évacuation (36) situés sur ledit corps (12) ;
    - une paire de paliers magnétiques opposés (46, 46') avec un espace entre eux, placés sur une surface latérale extérieure d'une partie intermédiaire du corps (12) ; la bobine (14) étant placée sur le corps de récipient (12) de sorte à englober lesdits paliers magnétiques (46, 46') ;
    - un piston de refoulement (16) qui est placé à l'intérieur du corps (12) et coulisse dedans, ledit piston de refoulement (16) reposant sur un ressort avant (20) et sur un ressort arrière (20') ;
    - une bague magnétique (52) placée dans la partie inférieure centrale du corps de récipient (12), en face du conduit d'amenée (44'),
    Caractérisée en ce que la bague magnétique (52) présente une section supérieure fuselée (52') en face du piston de refoulement (16) en conditions de fonctionnement.
  2. Motopompe selon la revendication 1, caractérisée en ce que le piston de refoulement (16) présente une section interne inférieure fuselée (16'), ladite section interne inférieure (16') étant, de préférence, contre-formée sur ladite section supérieure fuselée (52').
  3. Motopompe selon les revendications 1 ou 2, caractérisée en ce qu'une extrémité inférieure de la bague magnétique (52) correspond au corps de récipient (12) dans la partie intermédiaire, près d'une partie terminale (44) qui détermine le conduit d'amenée (44'), ladite bague magnétique (52) interagissant avec la paire de bagues magnétiques (46, 46') pour augmenter le champ magnétique et, par conséquent, la force d'attraction magnétique exercée sur le piston de refoulement (16).
  4. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit ressort avant (20) et/ou ledit ressort arrière (20') sont de forme hélicoïdale.
  5. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit corps (12) comprend :
    - une partie avant de plus grand diamètre, en face du conduit d'évacuation (36) ;
    - une partie intermédiaire adjacente de plus petit diamètre que celui d'une partie avant délimitant une chambre de coulissement du piston (16) ; et
    - une partie terminale (44), dont le diamètre est inférieur à celui de la partie intermédiaire adjacente, dans laquelle ladite partie terminale (44) détermine le conduit d'amenée (44').
  6. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une surface latérale extérieure de la bague magnétique (52) comprend :
    - une zone arrière en face du conduit d'amenée (44'), dont le diamètre est identique ou légèrement inférieur au diamètre interne de la partie intermédiaire du corps de récipient (12) ; et
    - une zone avant adjacente en face du conduit d'évacuation (36), dont le diamètre est inférieur, ladite zone arrière et ladite zone avant en face du conduit d'évacuation (36) déterminent un épaulement correspondant pour le ressort arrière (20').
  7. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce que l'extrémité inférieure de la bague magnétique (52) correspond au corps de récipient (12) dans la partie intermédiaire adjacente à l'étranglement de la partie terminale (44) qui détermine le conduit d'amenée (44'), la distance entre une extrémité opposée de ladite bague (52) et le piston (16) étant inférieure à celle entre ce dernier et une ou l'autre des deux bagues magnétiques (46, 46') situées à l'endroit où arrive le piston (16), pendant une phase de chargement du ressort arrière (20').
  8. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite bague magnétique (52) est faite dans un acier à faible rémanence magnétique.
  9. Motopompe selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite motopompe comprend également des moyens d'écartement agissant fonctionnellement entre le piston de refoulement (16) et la bague magnétique (52), de sorte à garder une distance minimale non-nulle entre le piston (16) et la bague (52) pendant un mouvement oscillatoire du piston (16).
  10. Motopompe selon la revendication 9, dans laquelle lesdits moyens d'écartement comprennent le ressort arrière (20') et/ou des moyens pour donner un pré-chargement prédéterminé audit ressort arrière (20').
EP07723275A 2007-03-15 2007-03-15 Motopompe hydraulique-électromagnétique à piston flottant Active EP2122167B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07723275T PL2122167T3 (pl) 2007-03-15 2007-03-15 Hydrauliczno-elektromagnetyczna napędzana silnikiem pompa z tłokiem suwakowym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/002283 WO2008110187A1 (fr) 2007-03-15 2007-03-15 Motopompe hydraulique-électromagnétique à piston flottant

Publications (2)

Publication Number Publication Date
EP2122167A1 EP2122167A1 (fr) 2009-11-25
EP2122167B1 true EP2122167B1 (fr) 2011-02-23

Family

ID=39015960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07723275A Active EP2122167B1 (fr) 2007-03-15 2007-03-15 Motopompe hydraulique-électromagnétique à piston flottant

Country Status (9)

Country Link
EP (1) EP2122167B1 (fr)
CN (1) CN101755123B (fr)
AT (1) ATE499527T1 (fr)
DE (1) DE602007012769D1 (fr)
ES (1) ES2361503T3 (fr)
PL (1) PL2122167T3 (fr)
PT (1) PT2122167E (fr)
TW (1) TWI422742B (fr)
WO (1) WO2008110187A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015162221A1 (fr) * 2014-04-25 2015-10-29 Sysko Ag Pompe à armature oscillante pourvu d'un élément de guidage de flux
DE102015105316A1 (de) * 2015-04-08 2016-10-13 Sysko Ag Schwingankerpumpe
IT201700060837A1 (it) * 2017-06-05 2018-12-05 Ceme Spa Motopompa idraulica elettromagnetica con pistone flottante

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2491968B1 (fr) * 2011-02-24 2014-09-17 Erbe Elektromedizin GmbH Dispositif de pompe pour fluide stérile et système de pompe doté d'un tel dispositif de pompe
WO2012177331A1 (fr) * 2011-06-21 2012-12-27 Agr Subsea, As Pompe à fluide à entraînement direct destinée à des systèmes de forage à pompe sous-marine de relevée de fluide
DE102015119567A1 (de) * 2015-11-12 2017-05-18 Sysko Ag Getränkezubereitungssystem
US10221841B2 (en) * 2016-03-15 2019-03-05 Ode (Hk) Company Limited Fluid pump
CN105971838B (zh) * 2016-07-15 2017-11-28 东莞辉奥电器有限公司 一种流体泵

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US3162134A (en) * 1961-11-24 1964-12-22 Mark E Lovell Electromagnetic pump and energizing means therefor
DE1453449C3 (de) * 1963-11-28 1974-08-08 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch angetriebene Kraftstoff-Förderpumpe
JPH0441260Y2 (fr) * 1984-10-15 1992-09-28
US4749343A (en) 1986-08-08 1988-06-07 Facet Enterprises, Inc. High pressure fluid pump
GB8709082D0 (en) 1987-04-15 1987-05-20 Eaton Sa Monaco Electrical fluid pump
JP4077542B2 (ja) 1997-11-11 2008-04-16 太産工業株式会社 電磁ポンプ
JP4203160B2 (ja) 1998-11-13 2008-12-24 株式会社ミクニ 電磁ポンプ
IT249882Y1 (it) * 2000-11-10 2003-06-05 C E M E Engineering S P A Pompa con valvola a doppio effetto
JP3960057B2 (ja) * 2002-01-25 2007-08-15 株式会社ケーヒン 二輪車用燃料供給装置における電磁ポンプ装置
ITTO20030400A1 (it) * 2003-05-30 2004-11-30 Buzzi Srl Micropompa elettromagnetica alternativa, particolarmente
JP4049082B2 (ja) * 2003-06-19 2008-02-20 株式会社豊田自動織機 圧縮機
CN2702079Y (zh) * 2004-06-24 2005-05-25 何杰辉 一种反回式真空泵

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015162221A1 (fr) * 2014-04-25 2015-10-29 Sysko Ag Pompe à armature oscillante pourvu d'un élément de guidage de flux
US9816496B2 (en) 2014-04-25 2017-11-14 Sysko Ag Oscillating armature pump with a flux-conducting element
DE102015105316A1 (de) * 2015-04-08 2016-10-13 Sysko Ag Schwingankerpumpe
IT201700060837A1 (it) * 2017-06-05 2018-12-05 Ceme Spa Motopompa idraulica elettromagnetica con pistone flottante
WO2018224903A1 (fr) * 2017-06-05 2018-12-13 Ceme S.P.A. Pompe à moteur hydraulique à piston flottant électromagnétique

Also Published As

Publication number Publication date
CN101755123B (zh) 2012-10-31
DE602007012769D1 (de) 2011-04-07
CN101755123A (zh) 2010-06-23
TW200940833A (en) 2009-10-01
PL2122167T3 (pl) 2011-07-29
WO2008110187A1 (fr) 2008-09-18
ATE499527T1 (de) 2011-03-15
ES2361503T3 (es) 2011-06-17
EP2122167A1 (fr) 2009-11-25
TWI422742B (zh) 2014-01-11
PT2122167E (pt) 2011-05-25

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