EP1915763B1 - Elektromagnetisches stellglied mit einer magnetröhre, verwendet zum betätigen eines hydraulischen oder pneumatischen ventils - Google Patents

Elektromagnetisches stellglied mit einer magnetröhre, verwendet zum betätigen eines hydraulischen oder pneumatischen ventils Download PDF

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Publication number
EP1915763B1
EP1915763B1 EP06794268.0A EP06794268A EP1915763B1 EP 1915763 B1 EP1915763 B1 EP 1915763B1 EP 06794268 A EP06794268 A EP 06794268A EP 1915763 B1 EP1915763 B1 EP 1915763B1
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EP
European Patent Office
Prior art keywords
magnetic
electromagnetic actuator
pole
tubular part
magnetic core
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 - Fee Related
Application number
EP06794268.0A
Other languages
English (en)
French (fr)
Other versions
EP1915763A1 (de
Inventor
Aimé Goubely
Pascal Gantelme
Luca Cassini
Gillian Escandell
Eric Passolunghi
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.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Publication of EP1915763A1 publication Critical patent/EP1915763A1/de
Application granted granted Critical
Publication of EP1915763B1 publication Critical patent/EP1915763B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F2007/163—Armatures entering the winding with axial bearing

Definitions

  • the present invention relates to the general technical field of electromagnets, and more particularly to the technical field of electromagnetic actuators. These are for example used to actuate hydraulic or pneumatic valves.
  • Electromagnetic actuators having an electric coil mounted in a magnetic yoke having a first pole portion and a second pole portion, integral with the yoke, which each extend adjacent a side of a free space in which moves a magnetic core movable in translation under the effect of the power supply of the electric coil and the appearance of a different magnetic polarity to the polar parts.
  • electromagnets used in electromagnetic actuators which comprise a discontinuous magnetic circuit
  • the electrical coils housed in this magnetic circuit generate a magnetic flux in a core when a current flows through them.
  • the magnetic nuclei then serve to channel the magnetic flux that forms a north / south magnetic loop.
  • the mobile core is then driven to the position which will promote optimal circulation of this magnetic flux.
  • Electromagnetic actuators are used in which the magnetic core is positioned asymmetrically, meaning that said core is not in a position where the magnetic fluxes have a symmetrical configuration.
  • the stable position in which the configuration of the magnetic flux is symmetrical corresponds to the position in which the magnetic core will be placed under the effect of the magnetic field. The appearance of the magnetic field will therefore result in moving the magnetic core and provide an actuating force.
  • the object of the present invention is to optimize the performance of an electromagnetic actuator while reducing the costs associated with the construction of said actuator, as well as the manufacture of its component parts. It is therefore sought to simplify the electromagnetic actuator without impairing its performance.
  • Another object of the present invention is to provide a seal between the electrical part and the hydraulic part of an electromagnetic actuator with simple and inexpensive means.
  • the electromagnetic actuator comprises the features of claim 1. Contrary to popular belief, it is possible to optimize, or even improve, the performance of an electromagnetic actuator putting the two polar parts in short circuit magnet for guiding the displacement of the movable core and reducing the radial air gap between said core and the polar portion (s) to the minimum functional clearance necessary for the relative movement of said parts.
  • the magnetic junction between the two polar parts is therefore not a disadvantage, according to the present invention.
  • the tubular portion has on the side of a polar part a bottom forming a stop for the magnetic core.
  • the tubular portion is shaped and / or positioned to provide a seal between the free space and the electrical part, including the electric coil. It is therefore possible to remove any specific part or sealing device. In addition, it leads to a simplified construction of the actuator according to the invention.
  • the tubular portion constituting a magnetic continuity between the two polar parts has at least locally a thin wall, chosen to minimize leakage of magnetic flux between the polar parts.
  • the magnetic short circuit is controlled by the choice of dimensions of the cross section of the tubular part.
  • the absence of specific guiding and sealing parts also makes it possible to increase the section of the mobile core, thus improving the performance of the actuator according to the invention. Such remarkable performance could not be achieved with known electromagnetic actuators. It is therefore possible to envisage, in the context of the present invention, to reduce the bulk, in particular of the electric coil, while preserving the performance of a known electromagnetic actuator.
  • the tubular portion has a wall of constant thickness and low, for example less than a few tenths of millimeters.
  • the tubular portion has a reduced cross section over a portion of its length.
  • the tubular part is at least partially constitutive of the second part polar, whose connecting end having the reduced cross section is integral with the first polar portion.
  • the tubular portion is at least partly constitutive of the two polar parts, which are separated by the portion having the reduced cross section.
  • the tubular portion is reported for example on the magnetic yoke.
  • the tubular part can also be attached to the first polar part and the cylinder head.
  • the tubular part is attached to the two polar parts, for example by welding, fitting or gluing.
  • the electromagnetic actuator according to the invention also has the advantage of a mechanical construction in which the parts and the intermediate linkage mechanical elements are best removed, thereby reducing the lack of displacement or alignment between the elements. rooms. This is particularly interesting when it is necessary to align for example two tree bearings. This alignment will be all the better that the bearings will be machined simultaneously in the same room for example constitutive of the two polar parts rather than in separate parts and assembled together.
  • the present invention also relates or relates to a hydraulic or pneumatic valve comprising an electromagnetic actuator as presented above.
  • the electromagnetic actuator according to the invention comprises an electric coil (1) mounted in a magnetic yoke (2).
  • the electromagnetic actuator presents a first part polar (3) and a second polar portion (4) integral with the yoke (2).
  • the pole portions (3) and (4) each advantageously extend in the vicinity of one side of a free space (5) in which a magnetic core (6) moves. The latter is movable in translation under the effect of the power supply of the coil (1) and the appearance of a magnetic polarity different from the polar parts (3) and (4).
  • the electromagnetic actuator according to the invention also comprises a tubular part (7) of magnetic material.
  • the tubular portion (7) delimits the free space (5) at least in part and surrounds the magnetic core (6), which for example has a circular cross section.
  • the tubular portion (7) guides the displacement of the magnetic core (6).
  • the tubular portion (7) has a magnetic continuity with the polar portion (s) (3) and (4) for minimizing the radial gap between the magnetic core (6) and the or magnetic polar portions (3) and (4) by eliminating any misalignment between them.
  • a non-magnetic intermediate portion providing a guide interface between the magnetic pole portions (3) and (4) and the magnetic core (6).
  • the tubular part (7) advantageously made of the same magnetic material as the polar parts (3) and (4), thus makes it possible to form only one part thus dispensing with having to create connection means and indispensable sealing when the elements are made of different materials.
  • the magnetic core (6) has circumferential grooves (6a) in which rings or guide shoes (6b) are accommodated which promote the displacement and alignment of said magnetic core (6) in the tubular part (7).
  • the electromagnetic actuator figures 1 and 3 also comprises a pusher (8) passing through the axial air gap located in the free space (5) between an axial end of the magnetic core (6), and an axial end vis-à-vis the second polar part (4) or a magnetic continuity-related portion with the second polar portion (4).
  • the gap corresponds to a portion of the free space (5) that can be seen in the figures.
  • the tubular portion (7) has a bottom (7a) forming a stop for the magnetic core (6).
  • the tubular portion (7) is shaped and / or positioned to seal between the free space (5) and the electrical part of the actuator electromagnetic, including in particular the electric coil (1).
  • the tubular portion (7) constitutes a magnetic continuity between the two pole portions (3) and (4) and has at least locally a thin wall chosen to minimize magnetic flux leakage. It is thus possible to minimize the effect called magnetic "short-circuit" between the two polar parts (3) and (4).
  • the tubular portion (7) has a wall of constant and low thickness, for example less than a few tenths of a millimeter.
  • the thickness of the tubular part (7) is between 35/100 and 55/100 of a millimeter.
  • the tubular portion (7) has a reduced cross-section (7b) over a portion of its length.
  • reduced cross-section it is understood to mean a smaller thickness, taken in a cross section.
  • the tubular portion (7) is constitutive of the second pole portion (4) having a connecting end (7c) has the reduced cross section (7b). This connecting end is further secured to the first polar portion (3).
  • the magnetic core (6) is mounted in the tubular portion (7) and a spring (10) participating in maintaining the core in position.
  • the displacement of the magnetic core (6) also causes the displacement of a rod (11) integral with said magnetic core (6). It is this rod (11) which actuates for example the valve (9) hydraulic or pneumatic.
  • the tubular part (7) is constitutive of the two polar parts (3) and (4), which are separated by a portion having the reduced cross section (7b).
  • the two polar parts (3) and (4) are thus made in one piece constituting the tubular portion (7).
  • the bottom (7a) of the latter also serves to form a stop for the movable core (6).
  • the rod (11) actuating for example a hydraulic or pneumatic valve also passes through a complementary polar part (4a) in magnetic continuity with the second polar part (4).
  • the complementary polar part (4a) advantageously makes it possible to delimit axially the free space (5) and consequently the corresponding axial gap.
  • the tubular part (7) crosses or penetrates the magnetic yoke (2) and can be attached, and if necessary fixed, to the magnetic yoke (2) for example by means of welds, press fitting, crimping or any other means of 'assembly.
  • the tubular part (7) is attached and fixed on the polar part (3) by a weld bead (18).
  • tubular part (7) is attached directly to the magnetic yoke (2).
  • the tubular portion (7) is attached and fixed by any known means and in particular by a weld seam and / or by fitting into the two polar parts (3) and (4). Fixing ends (12) may also be provided.
  • the present invention also relates to valves (9) hydraulic or pneumatic, as represented for example to figures 1 and 3 , and actuated by an electromagnetic actuator according to the invention.
  • These valves (9) have a body in magnetic continuity with the second polar part (4), as shown in FIG. figure 1 , or a constituent body directly from said second polar portion (4), as shown in FIG. figure 3 .
  • the valve (9) has inlet (13) and outlet (14) ports and an elastic return means (15) biasing a closure member (16) actuated by the magnetic core (6).
  • the valves (9) hydraulic or pneumatic known as such are not described in more detail here. They are advantageously associated with seals (17) allowing a tight connection on a conduit not shown.
  • the tubular portion (7) of an electromagnetic actuator according to the invention also has the advantage of improving the precision of guiding and moving the magnetic core (6) relative to the polar parts (3) and (4).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (10)

  1. Elektromagnetisches Stellglied, umfassend eine elektrische Spule (1), die in einem Magnetjoch (2) befestigt ist, einen ersten polaren Teil (3) und einen zweiten polaren Teil (4), die mit dem Joch (2) fest verbunden sind, die sich jeweils in der Nähe einer Seite eines freien Raums (5) erstrecken, in dem ein verschiebbarer Magnetkern (6) unter der Einwirkung der Stromversorgung der elektrischen Spule (1) und dem Auftreten einer magnetischen Polarität, die an den polaren Teilen (3) und (4) unterschiedlich ist, verschoben wird, wobei das elektromagnetische Stellglied ferner einen rohrförmigen Teil (7) aufweist, der vollständig aus einem magnetischen Material ist, der mindestens teilweise den freien Raum (5) begrenzt und den Magnetkern (6) umgibt, um das Verschieben des Magnetkerns (6) zu führen, wobei der rohrförmige Teil (7) eine magnetische Kontinuität mit dem oder den polaren Teil (Teilen) (3, 4) derart aufweist, um den radialen Spalt zwischen dem Magnetkern (6) und dem oder den magnetischen polaren Teil (Teilen) (3, 4) zu reduzieren, wobei der rohrförmige Teil (7) ausgebildet und/oder angeordnet ist, um eine Abdichtung zwischen dem freien Raum (5) und dem elektrischen Teil zu erstellen, der insbesondere die elektrische Spule (1) aufweist, und mindestens lokal eine Wand mit geringer Dicke aufweist, die ausgewählt ist, um die Verluste des magnetischen Flusses zwischen den polaren Teilen zu reduzieren, dadurch gekennzeichnet, dass dieses elektromagnetische Stellglied einen Stößel (8) aufweist, der den axialen Spalt durchquert, der in dem freien Raum (5) zwischen einem axialen Ende des Magnetkerns (6) und einem axialen Ende gegenüber von dem zweiten polaren Teil (4) oder einem Anbauteil, das in magnetischer Kontinuität mit dem zweiten polaren Teil (4) ist, lokalisiert ist, und dadurch, dass der Magnetkern (6) Umfangsrillen (6a) aufweist, in denen Ringe oder Gleitschuhe (6b) angeordnet sind, die das Verschieben und das Ausrichten des Magnetkerns (6) in dem rohrförmigen Teil (7) begünstigen.
  2. Elektromagnetisches Stellglied nach Anspruch 1, dadurch gekennzeichnet, dass der rohrförmige Teil (7) auf der Seite von einem polaren Teil einen Boden (7a) aufweist, der einen Anschlag für den Magnetkern (6) bildet.
  3. Elektromagnetisches Stellglied nach Anspruch 1, dadurch gekennzeichnet, dass der rohrförmige Teil (7) eine Wand von gleichmäßiger und geringer Dicke, die beispielsweise kleiner als einige Zehntel Millimeter ist, aufweist.
  4. Elektromagnetisches Stellglied nach Anspruch 1, dadurch gekennzeichnet, dass der rohrförmige Teil (7) einen verringerten Querschnitt (7b) auf einem Abschnitt seiner Länge aufweist.
  5. Elektromagnetisches Stellglied nach Anspruch 4, dadurch gekennzeichnet, dass der rohrförmige Teil (7) mindestens teilweise Bestandteil des zweiten polaren Teils (4) ist und von dem ein Verbindungsende, das den verringerten Querschnitt (7b) aufweist, mit dem ersten polaren Teil (3) fest verbunden ist.
  6. Elektromagnetisches Stellglied nach Anspruch 4, dadurch gekennzeichnet, dass der rohrförmige Teil (7) Bestandteil der zwei polaren Teile (3) und (4) ist, die durch den Abschnitt getrennt sind, der den verringerten Querschnitt (7b) aufweist.
  7. Elektromagnetisches Stellglied nach Anspruch 6, dadurch gekennzeichnet, dass der rohrförmige Teil (7) auf dem Magnetjoch (2) angebracht ist.
  8. Elektromagnetisches Stellglied nach Anspruch 5, dadurch gekennzeichnet, dass der rohrförmige Teil (7) auf dem ersten polaren Teil (3) und auf dem Joch (2) angebracht ist.
  9. Elektromagnetisches Stellglied nach Anspruch 3, dadurch gekennzeichnet, dass der rohrförmige Teil (7) auf den zwei polaren Teil (3) und (4) angebracht ist.
  10. Hydraulisches oder pneumatisches Ventil (9), umfassend ein elektromagnetisches Stellglied nach einem der Ansprüche 1 bis 9.
EP06794268.0A 2005-08-03 2006-08-02 Elektromagnetisches stellglied mit einer magnetröhre, verwendet zum betätigen eines hydraulischen oder pneumatischen ventils Expired - Fee Related EP1915763B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0508288A FR2889621B1 (fr) 2005-08-03 2005-08-03 Actionneur electromagnetique comportant un tube magnetique et destine a actionner une vanne hydraulique ou pneumatique
PCT/FR2006/001876 WO2007015008A1 (fr) 2005-08-03 2006-08-02 Actionneur electromagnetique comportant un tube magnetique et destine a actionner une vanne hydraulique ou pneumatique

Publications (2)

Publication Number Publication Date
EP1915763A1 EP1915763A1 (de) 2008-04-30
EP1915763B1 true EP1915763B1 (de) 2017-09-13

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EP06794268.0A Expired - Fee Related EP1915763B1 (de) 2005-08-03 2006-08-02 Elektromagnetisches stellglied mit einer magnetröhre, verwendet zum betätigen eines hydraulischen oder pneumatischen ventils

Country Status (5)

Country Link
US (1) US8810346B2 (de)
EP (1) EP1915763B1 (de)
CN (1) CN101288136B (de)
FR (1) FR2889621B1 (de)
WO (1) WO2007015008A1 (de)

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JP6773943B2 (ja) * 2015-02-11 2020-10-21 ドットーレ・インジェニェーレ・マリオ・コッツァーニ・ソシエタ・ア・レスポンサビリタ・リミタータ 往復圧縮機のフロー制御アクチュエータ
ITUB20151950A1 (it) * 2015-07-08 2017-01-08 System Spa Dispositivo attuatore, in particolare per una testina di stampa a getto di inchiostro, con isolamento elettromagnetico
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Also Published As

Publication number Publication date
CN101288136B (zh) 2013-03-13
US20100194504A1 (en) 2010-08-05
US8810346B2 (en) 2014-08-19
FR2889621B1 (fr) 2011-05-13
WO2007015008A1 (fr) 2007-02-08
FR2889621A1 (fr) 2007-02-09
CN101288136A (zh) 2008-10-15
EP1915763A1 (de) 2008-04-30

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