EP1365149B1 - Moto-pumpe hydraulique électromagnétique avec piston flottant - Google Patents

Moto-pumpe hydraulique électromagnétique avec piston flottant Download PDF

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Publication number
EP1365149B1
EP1365149B1 EP03010665A EP03010665A EP1365149B1 EP 1365149 B1 EP1365149 B1 EP 1365149B1 EP 03010665 A EP03010665 A EP 03010665A EP 03010665 A EP03010665 A EP 03010665A EP 1365149 B1 EP1365149 B1 EP 1365149B1
Authority
EP
European Patent Office
Prior art keywords
magnetic
piston
motor pump
bushing
inlet 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
EP03010665A
Other languages
German (de)
English (en)
Other versions
EP1365149A3 (fr
EP1365149A2 (fr
Inventor
Rino Botti
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
Original Assignee
Ceme Engineering SpA
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 Ceme Engineering SpA filed Critical Ceme Engineering SpA
Publication of EP1365149A2 publication Critical patent/EP1365149A2/fr
Publication of EP1365149A3 publication Critical patent/EP1365149A3/fr
Application granted granted Critical
Publication of EP1365149B1 publication Critical patent/EP1365149B1/fr
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 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 percolators, irrigation systems and also in the automotive industry.
  • EP-A-1 205 663 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.
  • motor pumps have an important drawback that is essentially related to the pressure level that can be obtained, considering that sometimes, for particular uses, a high fluid pressurization is required. It is known that an increase in fluid pressurization can be obtained increasing the intensity of the magnetic field by the oversizing of the coil. This implies an unavoidable increase of the motor pump dimensions and a considerable additional cost due to the increase of the winding coils. A greater size of the body of the motor pump in its whole sometimes is not compatible with the installation of the motor pump on the target apparatus or it requires at least structural changes of the same apparatus. Even the increase in cost is an important factor that could lead to the manufacturing of uncompetitive products.
  • 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 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.
  • a motor pump comprising:
  • the magnetic bearing is preferably made of steel with a low magnetic residual content.
  • 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 said body 12 and coil 14; a delivery piston 16 that is placed in said body 12, slides in it and it is elastically supported by a common front helical spring 20 and by a rear one 20'.
  • a seal valve 24 and a packing 26 of the delivery piston 16 are commonly placed.
  • Said packing 26 and said seal valve 24 cooperate with a support bearing 28 and with a rubber gasket 30 that is elastically tensioned by a further helical spring 32.
  • Said spring 32 and partly the rubber gasket 30 are housed inside a seat 34 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 with an internal thread engaging with a matching part that is threaded in the outer part of the container body 12 is put on said duct 22 in a known way.
  • Said tubular-shaped container body 12 comprises a front part 40 with a higher diameter that faces the outlet duct 36; an adjacent intermediate part 42 with a lower diameter than the one of the front part 40 delimiting the sliding axial chamber of the piston 16 and a terminal part 44 whose diameter is extremely lower than the one of the intermediate part 42 that defines the inlet duct 44'.
  • the opposite magnetic bearings 46 and 46' that are properly spaced between them with the use of a known spacing element if necessary, are fit on the external side surface of said intermediate part 42 of the body 12.
  • the coil 14 is in its turn fit on the body 12 so that it can comprise said bearings 46, 46'.
  • the coil 14 is stabilized with known means that are for instance made of a shaped elastic ring 48 that matches with a face of the coil and a shoulder 50 placed on the body 12 between the front part 40 and the intermediate one 42 with a lower diameter that matches with the opposite face.
  • a magnetic bushing 52 Inside said container body 12 in the central-lower part facing the inlet duct 44', a magnetic bushing 52, preferably made of steel with a low magnetic residual content, is advantageously placed.
  • the external side surface of said magnetic bushing 52 has differentiated diameters and defines a rear area 54 that faces the duct 44' with a diameter that is equal or slightly lower than the internal one of the intermediate part 42 of the body 12 and an adjacent front area 56 facing the outlet hole or duct 36 with a lower diameter. Said areas 54 and 56 with different diameters form a matching shoulder 58 for the rear spring 20'.
  • the lower end of the magnetic bushing 52 matches with the body 12 in the intermediate part 42 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 known means such as the couple of helical springs 20 and 20' previously described that cooperate with the piston.
  • the power of the coil 14 is obtained, for example, by a conventional couple of electric connections of the fast-on 62 type.
  • the motor pump object of the present invention is highly efficient thanks to the presence of the magnetic bushing 52 that being aligned with the sliding axis of the piston 16 with one of its ends, it is close to the piston and therefore at a lower distance between the latter and one of the two magnetic bushings 46, 46' when it is 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Lubricants (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Glass Compositions (AREA)
  • Resistance Heating (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Claims (5)

  1. Groupe motopompe (10) du type hydraulique électromagnétique à piston flottant comprenant:
    - un corps (12) de conteneur qui est partiellement délimité, dans sa partie externe, par une bobine (14),
    - un conduit d'admission (44') et un conduit d'échappement opposé (36);
    - un piston de refoulement (16) qui est placé à l'intérieur du corps (12) et coulisse à l'intérieur de celui-ci, ledit piston (16) étant supporté par un ressort hélicoïdal avant (20) et par un ressort hélicoïdal arrière (20'),
    - une paire de paliers magnétiques opposés (46, 46') espacés l'un de l'autre et placés entre ledit corps (12) et ladite bobine (14), les deux paliers magnétiques opposés (46, 46') de ladite paire étant agencés coaxialement à l'axe de coulissement du piston de refoulement (16);
    caractérisé en ce que ledit groupe motopompe (10) comprend également un manchon magnétique (52) qui inclut une extrémité inférieure, placée à l'intérieur dudit corps (12) de conteneur dans la partie inférieure centrale de ce dernier face au conduit d'admission (44') et agencée coaxialement avec l'axe de coulissement du piston de refoulement (16); l'extrémité inférieure dudit manchon magnétique (52) concorde avec le corps (12) de conteneur dans la partie intermédiaire (42) près de la partie terminale (44) qui définit le conduit d'admission (44'); et ledit manchon magnétique (52) interagit avec la paire de paliers magnétiques (46, 46') pour accroître le champ magnétique et, donc, la force d'attraction magnétique exercée sur le piston de refoulement (16).
  2. Groupe motopompe selon la revendication 1, caractérisé en ce que ledit corps (12) comprend une partie avant (40) d'un diamètre plus élevé, faisant face au conduit d'échappement (36); une partie intermédiaire adjacente (42) d'un diamètre inférieur à celui de la partie avant (40), délimitant une chambre de coulissement du piston (16), et une partie terminale (44) d'un diamètre inférieur à celui de la partie intermédiaire (42), ladite partie terminale (44) définissant le conduit d'admission (44').
  3. Groupe motopompe selon la revendication 1 ou 2, caractérisé en ce que la surface latérale externe du manchon magnétique (52) comprend une zone arrière (54) faisant face au conduit (44'), dont le diamètre est égal ou légèrement inférieur au diamètre interne de la partie intermédiaire (42) du corps (12), et une zone avant adjacente (56) faisant face au conduit d'échappement (36), dont le diamètre est inférieur; lesdites zones (54, 56) définissant un épaulement concordant (58) pour le ressort arrière (20').
  4. Groupe motopompe selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extrémité inférieure du manchon magnétique (52) concorde avec le corps (12) de conteneur dans la partie intermédiaire (42) adjacente au rétrécissement de la partie terminale (44) qui définit le conduit d'admission (44'), la distance entre une extrémité opposée dudit manchon (52) et le piston (16) étant inférieure à la distance entre ce dernier et l'un ou l'autre des deux paliers magnétiques (46, 46') lorsqu'il est placé dans la position qui est atteinte par le piston (16) pendant l'étape de sollicitation du ressort arrière (20').
  5. Groupe motopompe selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit manchon magnétique (52) est en acier à faible teneur magnétique résiduelle.
EP03010665A 2002-05-23 2003-05-13 Moto-pumpe hydraulique électromagnétique avec piston flottant Expired - Lifetime EP1365149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20020271U 2002-05-23
IT000271U ITMI20020271U1 (it) 2002-05-23 2002-05-23 Elettropompa migliorata

Publications (3)

Publication Number Publication Date
EP1365149A2 EP1365149A2 (fr) 2003-11-26
EP1365149A3 EP1365149A3 (fr) 2003-12-17
EP1365149B1 true EP1365149B1 (fr) 2006-09-20

Family

ID=29287862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03010665A Expired - Lifetime EP1365149B1 (fr) 2002-05-23 2003-05-13 Moto-pumpe hydraulique électromagnétique avec piston flottant

Country Status (4)

Country Link
EP (1) EP1365149B1 (fr)
AT (1) ATE340306T1 (fr)
DE (1) DE60308440T2 (fr)
IT (1) ITMI20020271U1 (fr)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101900A1 (it) * 2010-10-18 2012-04-19 Olab Srl Pompa a vibrazione atta a trattare anche fluidi gassosi, in particolare aria.
AU2013323077A1 (en) * 2012-09-26 2015-04-09 Obotics Inc. Methods and devices for fluid driven adult devices
IT201700060837A1 (it) * 2017-06-05 2018-12-05 Ceme Spa Motopompa idraulica elettromagnetica con pistone flottante

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

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
DE60308440D1 (de) 2006-11-02
EP1365149A3 (fr) 2003-12-17
ATE340306T1 (de) 2006-10-15
DE60308440T2 (de) 2007-09-20
ITMI20020271U1 (it) 2003-11-24
EP1365149A2 (fr) 2003-11-26

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