EP2308064B1 - Système d électroaimant de levage et système de soupape - Google Patents

Système d électroaimant de levage et système de soupape Download PDF

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Publication number
EP2308064B1
EP2308064B1 EP09777302A EP09777302A EP2308064B1 EP 2308064 B1 EP2308064 B1 EP 2308064B1 EP 09777302 A EP09777302 A EP 09777302A EP 09777302 A EP09777302 A EP 09777302A EP 2308064 B1 EP2308064 B1 EP 2308064B1
Authority
EP
European Patent Office
Prior art keywords
armature
section
collar
valve
stroke
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
EP09777302A
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German (de)
English (en)
Other versions
EP2308064A1 (fr
Inventor
Jürgen Grün
Horst Bartel
Roland Schemmp
Klemens Strauss
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
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Publication of EP2308064A1 publication Critical patent/EP2308064A1/fr
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Publication of EP2308064B1 publication Critical patent/EP2308064B1/fr
Active legal-status Critical Current
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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
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • 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
    • H01F2007/1661—Electromagnets or actuators with anti-stick disc

Definitions

  • the invention relates to a Hubmagnetan extract with a pole tube.
  • the invention further relates to a valve arrangement.
  • a pressure-tight solenoid has, in addition to the pole tube, a coil for actuating an armature which is axially movably guided in an armature space of the pole tube.
  • the pole tube consists essentially of a pole piece - also Polkern - which can be screwed via a central thread in a valve housing, a non-magnetic intermediate piece and a subsequent to this piece of pipe which is closed on the side facing away from the pole piece frontally by means of a serving as a stroke limiter component ,
  • the pole piece, the intermediate piece, the pipe section and the stroke limiter delimit the armature space for the armature cooperating with the coil.
  • This is connected to a plunger, which passes through the pole piece in the axial direction and is used to actuate a valve spool of a hydraulic valve.
  • the non-magnetic spacer serves to divert the magnetic flux into the armature.
  • This non-magnetic intermediate piece may be formed annular cone-shaped for achieving a favorable force-displacement curve. In the production of such a shape but associated with effort. Especially With simple solenoids, the simplest possible geometry of the intermediate piece should be used.
  • the JP-09306731 A which is considered as the closest prior art, shows an electromagnet in which a pole tube is formed by a Polkern clar and a thin tube piece which is plugged into an outer circumferential groove of the Polkern flirts.
  • the Polkern beau has a double-stepped recess.
  • An associated anchor has a double stepped collar.
  • the second step or recess has a lower height than the first step. It is therefore an object of the present invention to provide an improved solenoid assembly, which in particular can be adapted constructively to the operating force characteristic of a valve in a simple manner.
  • the force-stroke curve can be designed so that on a defined portion of the stroke, namely on the path of the armature between the two edges, a targeted plateau-shaped increase in the force.
  • the Hubmagnetan angel invention is simple and inexpensive to produce. It can be optimally adapted to the flow force characteristics, e.g. to adapt to switching valves. By means of the described design, the force even decreases again in the end region of the armature stroke, ie after immersion of the collar in the depression. This contributes to a lower stress on the anti-stick lens, a lower switching noise and a faster turn-off time. Overall, with the valve arrangement according to the invention with lower electrical power higher valve forces or flow forces can be overcome and in particular switching valves are operated safely and efficiently.
  • valve is combined with a stroke characteristic that is optimally adapted to the flow force conditions of the valve in its characteristic curve.
  • the adjustment is structurally simple on the geometric aspect ratios at the collar and waistband. In a vivid way, for example, the Position of said edges adapted to the course of the opening cross-section of the valve on the Betuschistshub.
  • the transition section is formed of a non-magnetizable material and a separation surface between the transition section and the collar is aligned substantially perpendicular to a central axis of the pole tube.
  • a separation surface between the transition section and the collar is aligned substantially perpendicular to a central axis of the pole tube.
  • the manufacture is e.g. using the resistance welding technique - e.g. capacitor discharge welding or center frequency welding - for joining pole piece and separator ring, which forms the transition section, particularly simple.
  • an anti-sticking disc is arranged between the end face of the armature and the shoulder of the pole piece.
  • the anti-slug also withstands high loads.
  • the anti-stick disc could even be mounted on the collar and thus rest on the end face of the anchor captive.
  • the geometry described anchor and Polkernabites can also be cleaned to damp a stop of the anchor on the pole core.
  • a radial gap between the collar and the depression is sized accordingly.
  • the fluidic damping then takes place via the displacement of fluid from an outer annular space between the armature - more precisely its end face and the collar - and the shoulder of the recess.
  • a first position of the armature wherein the end face of the armature faces a boundary line of the end face of the collar, a low degree of opening of the valve, ie a position of the valve piston at the flow forces are relevant.
  • a second position of the armature in which an end face of the collar of the armature of the shoulder facing the recess, corresponds to a stronger degree of opening of the valve, in which the valve piston has almost completed its opening stroke and in which the flow forces relax again. This can e.g. Be 25% and 75% of the opening stroke of the valve piston.
  • FIG. 1 a solenoid assembly 1 for actuating a valve spool of a hydraulic valve (not shown) is shown.
  • the Hubmagnetan Aunt 1 has a fluid-tight pole tube 3.
  • the pole tube 3 has a Polkernabrisk 5, a separating section 7 - in the claims also referred to as a transition section -, a pipe section 9 and a closure piece 11 - also called stroke limitation.
  • the pole core section 5, the separation section 7, the pipe section 9 and the closure piece 11 form a circular cylindrical receiving space for an armature 13.
  • a plunger 15 is guided in the pole core section 5 and emerges on the outer end side of the pole core section 5 from this.
  • the pole tube 3 is screwed into a valve housing of the hydraulic valve.
  • a coil component is pushed. This includes the actual coil 19 and a housing made of magnetic material (not shown), which represents a yoke for a magnetic circuit including the pole tube 3.
  • the separating section 7 interrupts the magnetic circuit in the region of the working air gap 21 between the armature 13 and the pole core section 5 and forces the magnetic field lines from the pole core section 5 to the armature 13.
  • the armature 13 is provided at its the Polkernabexcellent 5 facing end face with a projecting from the end face 22 collar 24. On the annular end face 22 an anti-stick washer 25 is placed. If necessary, this can be mounted on the collar 24 for attachment.
  • the armature 13 pass through axial fluid compensation channels 27. These open into an end face 29 of the collar 24.
  • the Polkernabites has on the inside a stepped recess 31 for receiving the armature portion facing it.
  • This depression 31 is divided as follows: A collar 33 protrudes annularly beyond an inside end face 34 of the pole core section 5. The end face 34 further forms a shoulder for a central depression 36.
  • the inner diameter of the collar 33 corresponds to the inner diameter of the separating section 7 and the pipe section 9.
  • the inner diameter of the recess 36 is selected so that the collar 24 can dip into the depression 36.
  • a fluidic damping of the armature movement in the end position can be achieved via a gap between collar 24 and recess 36.
  • the damping volume is located in one of the collar 24, the end face 22, the end face 34 and the collar 33 limited annular space.
  • FIG. 2 The area around the working air gap 21 is in FIG. 2 shown enlarged.
  • a pole tube 3 with such a separating section 7 can be added, for example, by electrical resistance welding of tubular or cup-shaped semi-finished products.
  • the anti-stick disc 25 ' is a variant of FIG. 1 shown.
  • the anti-stick disc 25 ' is inserted into the working air gap 21 and rests on the end face 34. There it can be attached if necessary.
  • the collar 24 is bounded at the end by an outer annular edge 41. Likewise, at the transition from the end face 22 of the armature in the lateral surface of an annular edge 40 is present. On the inner wall of the pole tube 3 is located at the transition from the collar 33 to the separation section 7 an imaginary, circular boundary line 42 at which the magnetizability of the pole tube 3 changes abruptly in the axial course. Between the end face 34 and the recess 36, the annular edge 43 is present in the stepped recess 31 of the Polkernabites 5. This can be bevelled or rounded.
  • FIG. 3 shows a force-stroke characteristic 50 of a conventional Hubmagnetanssen, eg an actuating magnet, as in the above-mentioned DE 197 07 587 A1 describes a force-stroke characteristic curve 52 of the solenoid assembly 1 according to the invention and an actuating force-stroke characteristic curve 54 (dashed line) of a typical directly actuated switching valve of the nominal size 6 or 10.
  • the hub is divided into areas B1 to B6. The length of the areas is in the order of, for example, 1 to 2 mm.
  • the characteristic curve 54 of the valve has a baseline B1 rising to baseline, which is due to the usual action on the valve piston with a return spring and by the friction of the valve piston in the valve bore.
  • the armature 13 begins to move in the direction of the Polkernabitess 5.
  • the movement begins in the area B6 or at the transition from the area B5 to the area B4 - here is an investment on the plunger 15 - with initially low power, as the line 52 shows.
  • the area B3 is the portion of the movement sequence at which the annular edge 40 of the armature 13 passes over the boundary line 42 to the collar. Between the annular edge 40 and the boundary line 42 is a high density of magnetic field lines in the working air gap. When immersing the armature 13 with the annular edge 40 in the collar 33, therefore, there is a significant decrease in the present in the working air gap magnetic field energy. Due to this, the characteristic 52 steeply increases from the area B4 to the area B3.
  • the described solenoid assembly 1 is ideal for operating a switching directional control valve.
  • the typical Betschistskraftkennline 54 on the stroke of the valve spool has, as I said, a significant increase due to flow forces in the increase of the opening cross section, until the full valve opening is reached. This can be seen as a plateau of the actuating force in the areas B2 and B3 of the characteristic 54.
  • the solenoid assembly 1 is now inter alia by means of the lengths of collar 24 and collar 33 designed so that the plateau of the actuating force in the characteristic curve 54 is covered by the plateau-like increase in the magnetic force in the characteristic curve 52. So there is enough magnetic force to safely switch the valve on every section of the armature stroke.
  • the use of the Hubmagnetan teaspoon invention was described in a normally closed switching directional control valve for carrying out the opening stroke.
  • the application can also be used in a normally open switching switching valve to perform the closing stroke.
  • the Hubmagnetan teaspoon invention can also be used to operate a proportional valve.
  • several arranged in stages collars can be provided on the anchor and a corresponding multi-stepped depression on the pole piece, which receives the leaflets each in suitable depressions, are used.
  • Another variant is to form the collar 33 conical. Then, by the previously described shape of the armature 13 with collar 24 and through the stepped recess 31, the proportional range can be extended to a larger stroke range.

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

Claims (10)

  1. Système d'électroaimant de levage, comprenant :
    un tube polaire (3) qui se divise axialement en une portion de noyau polaire (5), une portion de transition (7) et une portion tubulaire (9), un flux magnétique entre la portion de noyau polaire (5) et la portion tubulaire (9) étant interrompu par la portion de transition (7), et
    une armature (13) guidée mobile dans le tube polaire (3), qui présente sur son côté frontal tourné vers la portion de noyau polaire (5) un épaulement (24) saillant axialement hors d'une surface frontale (22),
    la portion de noyau polaire (5) présentant un renfoncement étagé (31), dans lequel l'armature (13) peut plonger et qui, à partir de la portion de transition (7), se divise en un bord annulaire (33), un épaulement (34) et un renfoncement (36) en retrait axialement et radialement,
    une dimension axiale du bord (33) dépassant une dimension axiale de l'épaulement (24),
    caractérisé en ce
    qu'un diamètre intérieur du bord (33) correspond à un diamètre intérieur de la portion de transition (7) et à un diamètre intérieur de la portion tubulaire (9).
  2. Système d'électroaimant de levage selon la revendication 1, caractérisé en ce que la portion de transition (7) se compose d'un matériau non magnétisable et en ce qu'une surface de séparation entre la portion de transition (7) et le bord (33) est orientée sensiblement perpendiculairement à un axe médian du tube polaire (3).
  3. Système d'électroaimant de levage selon la revendication 1 ou 2, caractérisé en ce qu'un disque antiadhésif (25) est disposé sur la surface frontale (22) de l'armature.
  4. Système d'électroaimant de levage selon la revendication 1 ou 2, caractérisé en ce qu'un disque antiadhésif (25') est disposé sur l'épaulement (34) du renfoncement (31).
  5. Système d'électroaimant de levage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un rapport de la dimension axiale de l'épaulement (24) sur la dimension axiale du bord (33) est entre 1 sur 2 et 1 sur 4, par exemple de 1 sur 2, 1 sur 3, ou 1 sur 4.
  6. Système d'électroaimant de levage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un espace radial entre l'épaulement (24) et le renfoncement (36) est dimensionné de telle sorte qu'un mouvement de l'armature (13) vers une position d'extrémité sur la portion de noyau polaire (5) soit amorti fluidiquement.
  7. Système de soupape avec un boîtier, avec un tiroir de soupape guidé de manière déplaçable dans un alésage de soupape à l'intérieur du boîtier, à travers lequel une section transversale de commande d'une connexion fluidique peut être réglée, et avec un système d'électroaimant de levage (1) selon l'une quelconque des revendications 1 à 6, qui est prévu pour actionner le tiroir de soupape.
  8. Système de soupape selon la revendication 7, caractérisé en ce qu'une première position de l'armature (13), dans laquelle la surface frontale (22) de l'armature (13) est en regard d'une ligne de limitation interne (42) du bord (33) du côté de la section de transition, et une deuxième position de l'armature (13), dans laquelle une surface frontale (29) de l'épaulement (24) de l'armature (13) est en regard de l'épaulement (34) du renfoncement (31), sont disposées de manière à correspondre à un profil de forces attendu (54) de forces d'écoulement agissant lors d'une opération d'ouverture sur le tiroir de soupape.
  9. Système de soupape selon la revendication 8, caractérisé en ce que la première position de l'armature (13) correspond à un faible degré d'ouverture de la section transversale de commande, et en ce que la deuxième position de l'armature (13) correspond à une section transversale de commande relativement plus grande, notamment pratiquement complètement ouverte.
  10. Système de soupape selon la revendication 8 ou 9, caractérisé en ce que la première position de l'armature (13) correspond à une levée de 20% à 40%, notamment de 25% d'une levée du tiroir de soupape associée à l'opération d'ouverture, et la deuxième position de l'armature (13) correspond à une levée de 60% à 85%, notamment de 75% de la levée du tiroir de soupape associée à l'opération d'ouverture.
EP09777302A 2008-07-29 2009-07-20 Système d électroaimant de levage et système de soupape Active EP2308064B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008035332A DE102008035332A1 (de) 2008-07-29 2008-07-29 Hubmagnetanordnung und Ventilanordnung
PCT/EP2009/005250 WO2010012394A1 (fr) 2008-07-29 2009-07-20 Système d’électroaimant de levage et système de soupape

Publications (2)

Publication Number Publication Date
EP2308064A1 EP2308064A1 (fr) 2011-04-13
EP2308064B1 true EP2308064B1 (fr) 2012-02-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777302A Active EP2308064B1 (fr) 2008-07-29 2009-07-20 Système d électroaimant de levage et système de soupape

Country Status (6)

Country Link
US (1) US8757586B2 (fr)
EP (1) EP2308064B1 (fr)
CN (1) CN102113067B (fr)
AT (1) ATE547796T1 (fr)
DE (1) DE102008035332A1 (fr)
WO (1) WO2010012394A1 (fr)

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DE102013218766A1 (de) 2013-09-19 2015-03-19 Robert Bosch Gmbh Lagerstellenpositionierung dünngedrehtes Polrohr

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DE102011088463A1 (de) * 2011-06-29 2013-01-03 Robert Bosch Gmbh Bauteil für einen Magnetaktor sowie Verfahren zu dessen Herstellung
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Publication number Priority date Publication date Assignee Title
DE102013218766A1 (de) 2013-09-19 2015-03-19 Robert Bosch Gmbh Lagerstellenpositionierung dünngedrehtes Polrohr

Also Published As

Publication number Publication date
EP2308064A1 (fr) 2011-04-13
ATE547796T1 (de) 2012-03-15
WO2010012394A1 (fr) 2010-02-04
CN102113067A (zh) 2011-06-29
US8757586B2 (en) 2014-06-24
DE102008035332A1 (de) 2010-02-04
US20110147629A1 (en) 2011-06-23
CN102113067B (zh) 2013-02-27

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