EP3312853A1 - Électro-aimant - Google Patents

Électro-aimant Download PDF

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Publication number
EP3312853A1
EP3312853A1 EP17197652.5A EP17197652A EP3312853A1 EP 3312853 A1 EP3312853 A1 EP 3312853A1 EP 17197652 A EP17197652 A EP 17197652A EP 3312853 A1 EP3312853 A1 EP 3312853A1
Authority
EP
European Patent Office
Prior art keywords
tube
core
stabilizing body
electromagnet
electromagnet 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.)
Withdrawn
Application number
EP17197652.5A
Other languages
German (de)
English (en)
Inventor
Helmut Mang
Peter Tappe
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.)
SVM Schultz Verwaltungs GmbH and Co KG
Original Assignee
SVM Schultz Verwaltungs GmbH and Co KG
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 SVM Schultz Verwaltungs GmbH and Co KG filed Critical SVM Schultz Verwaltungs GmbH and Co KG
Publication of EP3312853A1 publication Critical patent/EP3312853A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the invention relates to an electromagnet, in particular for actuating a valve, wherein the electromagnet has a coil body which carries windings of an electric current-conducting wire, and a tube tube, at least partially, is arranged inside the coil body and the tube tube forms an armature space, in which an anchor is mounted longitudinally movable and acts on a, mounted in a core of the electromagnet ram.
  • the tube tube in one piece, but from different sections to produce. These sections differ in their properties of the line or leadership of the magnetic field lines (magnetic conductivity).
  • the end sections of the tube tube are made of materials / metals with good or better magnetic conductivity. Between these sections is a piece of a material / metal with poor or less magnetic conductivity.
  • the invention is based on an electromagnet as described above and suggests that the first longitudinal section of Tubusrohres is supported in a stabilizing body and the second longitudinal section of Tubusrohres is held by the core and the stabilizing body and the core axially, based on the Coil longitudinal axis of the bobbin, are spaced.
  • the stabilizing body or the core consists of a material with good / high magnetic conductivity.
  • the stabilizer body and the core are spaced apart and are connected by the tube tube, wherein the tube tube is formed of a material with poor / low magnetic conductivity.
  • the three elements stabilizing body, Tubusrohr and core not necessarily mechanically fixed together, for example, to be welded, the tightness of the electromagnet, in particular the Anchor space is achieved by a correspondingly dense configuration of the tube tube alone.
  • the stabilizing body is placed on the first longitudinal section (facing the first longitudinal end) of the tube tube and supports it therefrom, the core is also placed on the second longitudinal section (facing the second longitudinal end) of the tube tube and held so.
  • a correspondingly high pressure ensures sufficient mechanical cohesion, which can be achieved cost-effectively with corresponding production methods.
  • the trick of the invention is that a clever arrangement of the individual components core tube yoke with stabilizing body allows to dispense with the complex to be performed welding or soldering according to the prior art.
  • Core and yoke are preferably made of soft magnetic material, the material of Tubusrohres has a low magnetic conductivity.
  • the individual components are preferably homogeneous in themselves (without the invention to be limited thereto) and positioned axially so cleverly to each other that prevail by the spacing on the one hand and the selection of material on the other hand at the working air gap favorable magnetic conditions that improve the efficiency.
  • the proposal according to the invention completely avoids welding or soldering or, if such a connection is required, allows it to be carried out in such a way that no post machining machining is necessary. It is advisable to note that welding or soldering influences the magnetic properties as well as the strength properties.
  • the proposal according to the invention not only reduces the production costs, but also avoids an impairment of the magnetic or other properties of the electromagnet.
  • the tube tube is open on both sides.
  • the tube tube strictly speaking the inside of the tube tube, serves as a guide for the anchor. It is known to form the tube tube as a section of a profile product, for example a tube. This is a convenient way to realize the Tubusrohr, which is sometimes also referred to as pole tube.
  • the tube tube is pot-shaped and is open on one side. Since, according to the proposal according to the invention, the tube tube no longer has to assume a mechanical holding task, therefore, a thin-walled embodiment of the tube tube is also possible.
  • the small wall thickness of the Tubusrohres but also makes it possible to design the Tubusrohr itself differently and to realize, for example, as a one-piece cup-shaped element and so give the Tubusrohr further properties.
  • “Integral” here means that the Tubusrohr consists of one piece, although it is composed of several individual elements, with different properties, for example, their magnetic properties, assembled and welded, for example.
  • a “pot-like tube tube” is therefore to be subsumed at least one tube piece (possibly also with different diameters) and a tube tube bottom closing the tube end.
  • the Tubusrohrêt closes preferably completely, possibly even only partially, one side of the Tubusrohres, preferably the first longitudinal portion of Tubusrohres, which stands in the stabilizing body.
  • the first longitudinal section has a curved Tubusrohrteil.
  • the curvature can be executed in the inner pot, facing away from the yoke, or to the outside.
  • the Tubusrohr leads the anchor and the Tubusrohr admir thus formed describes an end position of the armature.
  • the yoke is made of soft magnetic material, it still has a certain magnetization even when the current through the coil and the formation of a small gap or gap by the curvature between the end-side anchor surface, which faces the Tubusrohr réelle and the core, prevents sticking or adherence of the anchor, thus ensuring a reliable function.
  • the second longitudinal section has an expansion, and the tube tube with the expansion on the core, in particular the guide pin of the core, is placed.
  • the core in the core end facing the armature space, the core preferably has a ring-like configuration, which has at its open end a control cone, via which the force-stroke characteristic of the electromagnet is adjusted. Due to the proposed widening, the tube tube in the region of the core is widened in diameter in such a way that it is pushed onto this control cone, which here is part of the guide pin of the core. It also forms a pot-like structure at the core in the area of the guide pin. The inside of the core with the guide pin and the control cone integrated into it then takes on the leadership task for the anchor in this area. Due to the expansion, it is further achieved that the armature can interact directly with the control cone when the coil is energized.
  • a truncated cone is integrally formed on the end of the armature, that is, the armature consists of at least two different geometric basic bodies, a cylinder in the central portion and an end-side truncated cone.
  • the armature consists of at least two different geometric basic bodies, a cylinder in the central portion and an end-side truncated cone.
  • the core or the guide pin preferably has a circumferential groove or groove, and the end region of the first longitudinal section has an on-board filling or convex region which projects into this groove or groove.
  • a media- or pressure-tight composite is also possible at the same time, which is particularly favorable in valve applications where medium is located in the anchor space.
  • the guide pin carries an O-ring seal in a circumferential groove in order to close the gap between the tube tube and the guide pin.
  • O-ring seal is a proven sealant, which is an inexpensive alternative to welding, especially in mechanical joining techniques, such as press-fitting or positive-locking bonding.
  • the tube tube is designed as a deep-drawn part.
  • the thermoforming methods available in the art today make it possible to produce parts with high precision such that the inner sides can be used as guide surfaces, for example for the supports of an anchor.
  • the deep drawing is a cheaper manufacturing step.
  • the tube tube consists of a material with low magnetic conductivity.
  • this is e.g. an austenitic steel is provided.
  • materials having a relative permeability ⁇ 10 are used.
  • the stabilizing body is open on both sides.
  • the tube tube and the stabilizing body form a tube-in-tube system.
  • the yoke carries an annular groove into which the edge of the stabilizing body is inserted, the tube tube being connected to the core as described above. This results in a simple but accurate construction.
  • the stabilizing body is pot-shaped.
  • a corresponding material is deep-drawn or produced as a milled part, whereby the pot-like structure of the stabilizing body provides the soil itself.
  • the stabilizing body can be prepared as a separate component (for example as a piece of pipe, cut off from a profiled product) and then connected to the yoke, whereby the yoke then forms the bottom of the stabilizing body. It is therefore advantageous that the stabilizing body is designed as a component separate from the yoke and mechanically firmly connected thereto.
  • the stabilizing body is integrally formed on the yoke. Also in this case, a welding is preferably provided, the number of components is reduced, a part of the hole thus forms the stabilizing body.
  • the stabilizing body consists of a material with good or high magnetic conductivity. Soft magnetic materials are preferably used.
  • the quotient of the wall thickness of the Tubusrohres and the wall thickness of the stabilizing body is between 10 and 70%, preferably between 20 and 50%, particularly preferably between 25 and 40%.
  • the proposal according to the invention aims to distribute the known in the prior art complex structure of Tubusrohres or pole tube to individual, specialized on this components. Since now a separate stabilizing body is provided for the stabilization of the Tubusrohres, the Tubusrohr itself be realized filigree, since this then focuses only on the management task of the anchor. The Tubusrohr can therefore be advantageously reduced in its wall thickness, as described, which saves space and weight.
  • the middle section connects the two longitudinal sections.
  • a ring-like guide pin is provided with the end control cone on the core.
  • the spacing of the stabilizing body from the core has the effect that this material has very little influence on the magnetic properties of the control cone when the coil is energized.
  • the area of expansion of the Tubusrohres begins. Since the material of the Tubusrohres little or no effect on the magnetic field, this spacing is doubly effective, since the spacing or clearance provides space for expansion while minimally affecting the magnetic properties of the control cone.
  • the invention also includes the use of the electromagnet for the purpose of an electromagnetically controlled valve, for example pressure control valve.
  • FIG. 1 the electromagnet 1 according to the invention is shown in section.
  • the electromagnet 1 has a bobbin 2, which carries a plurality of windings 20 of a wire. If an electric current flows through this wire of the windings 20, a magnetic field is produced which acts on an armature 4 and moves it against the force of a restoring spring, not shown.
  • the return spring is disposed, for example, in the valve member actuated by the plunger 10 (also not shown).
  • the bobbin 2 has a coil longitudinal axis 21, the armature 4 is movable parallel to this coil longitudinal axis 21.
  • the tube tube 3 is arranged inside the bobbin 2.
  • the tube tube 3 forms, or limits the armature space 30, which receives the armature 4.
  • the armature 4 acts on a plunger 10 which is movably mounted in the core 5 of the electromagnet 1.
  • the movement of the armature 4 is out of the electromagnet 1 via the plunger 10 directed.
  • the plunger 10 is movably mounted in the bore 50 of the core 5.
  • the return spring not shown, presses on the plunger 10, the anchor 4 upwards, between the armature space bottom 34 and the lower edge 40 of the armature 4, the air gap 33 is formed.
  • the armature space floor 34 is also a boundary surface of the core 5.
  • the tube tube 3 is divided into at least two longitudinal sections, the first longitudinal section 31 and the second longitudinal section 32, which extend in particular to the respective ends of the tube tube 3.
  • the middle section 35 is located between the two longitudinal sections 31, 32.
  • the longitudinal sections 31, 32 extend as far as the respective ends of the tube tube 3.
  • the tube tube 3 is open on one side in the embodiment shown here, the second, lower open longitudinal section 32 is pushed onto the guide pin 51 of the core 5.
  • the invention also includes solutions in which the tube tube 3 is open on both sides.
  • the first longitudinal section 31 of the Tubusrohres 3 is closed by a Tubusrohrboden 36 pressure-tight.
  • the longitudinal portion 31 is formed pot-shaped so far.
  • the longitudinal section 31 is inserted into a likewise pot-like stabilizing body 6. This stabilizing body 6 closes off the upper end of the bobbin 2.
  • the Tubusrohr 3 has the task to provide a pressure-tight armature space 30 and the stabilizing body 6 with the core 5, to be precise, the guide pin 51 of the core 5 to connect.
  • the stabilizing body 6 and also the core 5, in particular the guide pin 51 are made of a material which has good or high magnetic conductivity.
  • Such a design significantly supports the leadership of the magnetic field generated by the current-carrying coil and increases the overall efficiency of the device.
  • the magnetic properties, in particular the current-force characteristic of the electromagnet 1 can be favorably influenced by a conical configuration of the upper edge 52 of the guide pin 51, which laterally limits the air gap 33.
  • the stabilizing body 6 does not follow in the axial direction (relative to the coil longitudinal axis 21) seamlessly against the upper edge of the guide pin 51, but is slightly spaced, this area is spanned by the central portion 35 of the Tubusrohres 3.
  • the stabilizing body 6 and the core 5 are axially spaced relative to the coil longitudinal axis 21 and are interconnected by the tube tube 3, in particular its central portion 35.
  • the core 5 or the guide pin 51, like the stabilizing body 6, is formed from a material which has good or high magnetic conductivity.
  • the stabilizing body 6 here has the additional task of mechanically supporting the upper, first longitudinal section 31 of the tube tube 3 (which has the tube tube bottom 36), which is advantageous in particular in high-pressure applications. At high Otherwise, the material thickness of the tube tube 3, which is naturally formed from a material with low or poor magnetic conductivity, would have to be increased, but this would adversely affect the overall magnetic properties.
  • the use of the stabilizing body 6 thus combines a high compressive strength with good magnetic properties.
  • the arrangement is chosen such that the first longitudinal section 31 of the tube tube 3 is inserted into the pot-like stabilizing body 6.
  • the dropped anchor 4 is then not directly on the body bottom 60 of the stabilizing body 6, but is slightly spaced from this, the Tubusrohrêt 36 acts here as an air gap and reduces the detachment forces of the armature 4. It is also provided, the Tubusrohr réelle 36 not straight but curved inwardly form whereby the distance of the fallen anchor 4 to the body bottom 60 increases significantly above the material thickness of Tubusrohrmateriales.
  • the tube tube 3 starting in the central portion 35 and then in the second longitudinal portion 32, which cooperates with the core 5, cone-like (facing away from Tubusrohrteil 36) is widened.
  • This widening 39 begins in the middle section 35 and also extends into the second longitudinal section 32.
  • the stabilizing body 6 is embedded or mounted in the yoke 11 of the electromagnet 1.
  • the yoke 11 closes the electromagnet 1 on the opposite side of the core 5 Bobbin 2 from.
  • the stabilizing body 6 is formed separately from the yoke 11. But it is also possible to realize the stabilizing body 6 in one piece, as part of the yoke 11, both solutions are part of the invention. Of course, it is also possible to use the stabilizing body 6 in the interior of the Tubusrohres 3.
  • the wall thickness of Tubusrohres 3 is selected according to the application of the electromagnet. If a high pressure resistance is required because the solenoid 1 drives a valve, a wall thickness of up to 0.8 mm (or even more) is used. At lower pressures, the wall thickness can be reduced accordingly to 0.3 mm (or even less).
  • the tube tube 3 is formed, for example, as a cold-formed, deep-drawn component, which has the same wall thickness everywhere. Alternatively, it is provided that the magnetic properties can be influenced in a targeted manner by changing the wall thickness. This applies in particular in the region of the middle section 35 or the first longitudinal section 31, here at the area of the cone 52 in which a reduction or increase in the wall thickness is alternatively provided with respect to the other areas of the tube tube.
  • first longitudinal section 31 and the second longitudinal section 32 20, 25, 30, 35, 40, 45, 50, 55, 60% of the total length of the tube tube 3 has.
  • the central portion 35 is 5, 10, 15, or 20% of the total length of the Tubusrohres 3, of course, the three elements, first and second longitudinal section 31,32 and Central portion 35 have an overall length of 100%. It is clear that the longitudinal sections of 31, 32 can also have different lengths.
  • a circumferential or annular groove 59 is provided on the guide pin 51, which receives a seal 53. It seals the gap between the inside of the tube tube 3 and the outside of the guide 51.
  • Anchor bores 40 are provided in the armature 4 extending parallel to the longitudinal axis of the coil 21, which allow rapid pressure equalization during the movement of the armature 4.
  • the tube tube 3 is connected in an advantageous variant with the stabilizing body 6 and the core 5 / guide pin 51 by conventional connection means.
  • This may be, for example, press-fitting, caulking, gluing, bracing (e.g., through a housing), soldering, or the like.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)
EP17197652.5A 2016-10-21 2017-10-20 Électro-aimant Withdrawn EP3312853A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016120153.7A DE102016120153A1 (de) 2016-10-21 2016-10-21 Elektromagnet

Publications (1)

Publication Number Publication Date
EP3312853A1 true EP3312853A1 (fr) 2018-04-25

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ID=60153224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17197652.5A Withdrawn EP3312853A1 (fr) 2016-10-21 2017-10-20 Électro-aimant

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EP (1) EP3312853A1 (fr)
DE (1) DE102016120153A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110718351A (zh) * 2018-07-13 2020-01-21 Svm舒尔茨管理有限责任两合公司 具有衔铁盘的电磁致动器
WO2023044640A1 (fr) * 2021-09-23 2023-03-30 舍弗勒技术股份两合公司 Actionneur électromagnétique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2032185A (en) * 1978-09-04 1980-04-30 Hitachi Ltd Current-stroke proportional type solenoid walve
DE8317753U1 (de) * 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung
DE3502730A1 (de) * 1985-01-28 1986-07-31 Rausch & Pausch, 8672 Selb Magnetventil
EP0935262A2 (fr) * 1998-02-09 1999-08-11 Schultz, Wolfgang E., Dipl.-Ing. Electroaimant
DE10238840A1 (de) * 2002-08-23 2004-03-04 Thomas Magnete Gmbh Magnetanordnung
EP2299457A2 (fr) * 2009-09-17 2011-03-23 Firma SVM Schultz Électro-aimant
US20130025959A1 (en) * 2011-07-28 2013-01-31 Hitachi Automotive Systems Steering , Ltd. Solenoid valve, solenoid and hydraulic power system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8317753U1 (de) * 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung
GB2032185A (en) * 1978-09-04 1980-04-30 Hitachi Ltd Current-stroke proportional type solenoid walve
DE3502730A1 (de) * 1985-01-28 1986-07-31 Rausch & Pausch, 8672 Selb Magnetventil
EP0935262A2 (fr) * 1998-02-09 1999-08-11 Schultz, Wolfgang E., Dipl.-Ing. Electroaimant
DE10238840A1 (de) * 2002-08-23 2004-03-04 Thomas Magnete Gmbh Magnetanordnung
EP2299457A2 (fr) * 2009-09-17 2011-03-23 Firma SVM Schultz Électro-aimant
US20130025959A1 (en) * 2011-07-28 2013-01-31 Hitachi Automotive Systems Steering , Ltd. Solenoid valve, solenoid and hydraulic power system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110718351A (zh) * 2018-07-13 2020-01-21 Svm舒尔茨管理有限责任两合公司 具有衔铁盘的电磁致动器
WO2023044640A1 (fr) * 2021-09-23 2023-03-30 舍弗勒技术股份两合公司 Actionneur électromagnétique

Also Published As

Publication number Publication date
DE102016120153A1 (de) 2018-04-26

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