EP4060694A1 - Aimant d'actionnement - Google Patents

Aimant d'actionnement Download PDF

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Publication number
EP4060694A1
EP4060694A1 EP22158762.9A EP22158762A EP4060694A1 EP 4060694 A1 EP4060694 A1 EP 4060694A1 EP 22158762 A EP22158762 A EP 22158762A EP 4060694 A1 EP4060694 A1 EP 4060694A1
Authority
EP
European Patent Office
Prior art keywords
actuating
magnet armature
magnet
armature
pole
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.)
Pending
Application number
EP22158762.9A
Other languages
German (de)
English (en)
Inventor
Christian Groh
Hans-Jürgen PAULY
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.)
Hydac Fluidtechnik GmbH
Original Assignee
Hydac Fluidtechnik 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
Application filed by Hydac Fluidtechnik GmbH filed Critical Hydac Fluidtechnik GmbH
Publication of EP4060694A1 publication Critical patent/EP4060694A1/fr
Priority to TW112127298A priority Critical patent/TW202422741A/zh
Pending 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
    • H01F7/081—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
    • H01F7/16—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
    • 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
    • H01F7/081—Magnetic constructions
    • H01F2007/086—Structural details of the armature

Definitions

  • the invention relates to an actuating magnet with a coil device that can be energized to move a magnet armature within a pole tube in at least one direction.
  • Such actuating magnets are also referred to in technical terms as proportional or switching magnets, which are freely available on the market in a large number of designs.
  • actuating magnets are used to control the respective valve piston of a hydraulic or pneumatic valve for the purpose of regulating a relevant flow of media between connections of a valve housing in which the valve piston is guided in a longitudinally movable manner.
  • An example is here on a proportional pressure control valve after DE 10 2011 018 873 A1 referred to with a valve housing in which the valve piston is guided in a guide so that it can be moved axially and under the action of an actuating magnet for the valve piston that can be energized and a restoring device that exerts a spring force and acts on the valve piston against the applied magnetic force of the actuating magnet, a media flow at least between two media connections installed in the valve housing.
  • the valve piston By activating the actuating magnet, i.e. energizing its coil arrangement, the valve piston establishes the medium-carrying connection between the named connections, taking into account the prevailing forces, on the basis of the prevailing pressures multiplied by the respective pressure-effective areas, the spring force, the flow forces and the magnetic force.
  • a media pressure present at at least one of the media connections in the valve housing, multiplied by a pressure-effective area on the valve piston, is in equilibrium with the prevailing actuating force of the actuating magnet, so that a more or less balanced force-displacement characteristic curve for the Actuating magnet can specify.
  • an actuating magnet in particular in the form of a proportional magnet or switching magnet, with a magnet armature, which is guided in an axially movable manner in a pole sleeve that is at least partially surrounded by a coil winding as part of a pole tube, to which a magnetic decoupling forming separation region is connected, which is also can be filled with a non-magnetic material, a pole core or pole piece connects as a further part of the pole tube, whereby when the coil winding is energized, a magnetic force acts on the armature, which pushes it within a displacement space as part of an armature space in the sense of a "pressing magnet” in the direction moved towards the pole piece.
  • the known solution is characterized in that at least one, preferably ring-shaped, insert made of ferromagnetic material of predetermined axial thickness can be introduced between the armature and the pole piece for a desired shortening of the axial length of this cubic capacity. If necessary, several such inserts, also in different thicknesses, can be used in the anchor space.
  • the respective insert mentioned is used as a control means for influencing the force-displacement characteristic for the actuating magnet or its magnet armature in the relevant armature space, with the result that, compared to a solution without such an insert, the force increase takes place with a progressively increasing characteristic, i.e. it comes in the direction of full deflection of the armature to an increased force on an actuating plunger of the valve piston, as in the DE 10 2011 018 873 A1 is shown for a proportional pressure control valve, so that such increased actuating forces act on the valve.
  • control means for influencing the force-displacement characteristic is introduced in the form of the respective insert in the armature space, in which the magnet armature is guided in a longitudinally movable manner, shortens the free actuation path for the magnet armature and thus reduces the maximum possible displacement path at the same time for the valve piston of a valve connected to the actuating magnet with its media or fluid connections.
  • the invention is therefore based on the object of further improving the known valve constructions in such a way that an obvious influencing of the force-displacement characteristic for the magnet armature is made possible, with quickly responding actuation behavior of the respective magnet armature with a small size.
  • a pertinent task is solved by an actuating magnet with the features of patent claim 1 in its entirety.
  • the magnet armature has at least one control means for influencing the mentioned force-displacement characteristic, at least in the sense of a force reduction at the end of a working stroke, the control means from the armature space are space-saving , as shown in the prior art, moved into the magnet armature.
  • the control means of the magnet armature can be optimized in such a way that the magnet armature already returns to its original position when it is not yet has struck the pole core or an anti-adhesive disc arranged on the pole core with its front face, which protects it or even makes it unnecessary. In this way, very force-balanced movements can be achieved for the magnet armature, which benefits the switching dynamics.
  • a second, correspondingly polarized coil device can also cause the magnet armature to move back into its unactuated neutral position.
  • the respective control means can be introduced into the outer contour of the magnet armature.
  • the control means is arranged in a space-saving manner in a component in the form of the magnet armature that is absolutely necessary for the function of the actuating magnet.
  • the respective control means can be formed from a control groove running at least in sections in the magnet armature.
  • Such control grooves can be introduced into the magnet armature easily and inexpensively using methods known from the prior art, for example by milling or laser cutting.
  • the respective control groove can be formed by a circumferential annular groove in the magnet armature, which is introduced into the magnet armature on its outer circumference and/or on an end face thereof.
  • a groove introduced on the end face of the magnet armature essentially causes a reduction in force, in particular the maximum force, in the area of the end stroke of the magnet armature, whereas a groove introduced on the outer circumference, in addition to a further reduction in force in the area of the end stroke, in the area of the working stroke causes a longer working stroke distance with a substantially horizontal force-displacement characteristic. It is particularly advantageous to have at least one circumferential annular groove on the outer circumference and on the end face of the magnet armature introduced this.
  • the groove introduced on the outer circumference and/or on the end face of the magnet armature can be segmented so that it has at least one interruption.
  • the course of the groove can be designed at least partially in the form of a ring and/or partially in the form of a thread.
  • the groove can be filled with any type of non-magnetizable material, which increases the rigidity and strength of the magnet armature.
  • a plurality of grooves can be provided on the outer circumference and/or on the end face of the magnet armature, which are arranged concentrically to the longitudinal axis of the magnet armature. At least one of the grooves made in the magnet armature on the outer circumference and/or on the end face can differ in terms of its depth from the at least one other groove made in the magnet armature on the outer circumference or on the end face, depending on the type of force-displacement characteristic you want to achieve.
  • the pole tube can be formed from a pole sleeve, in particular made of magnetizable steel, which is connected, in particular welded, via a separating ring to a pole piece, in particular made of magnetizable steel, which also limits a magnetic separation between the pole sleeve and the pole piece.
  • the circumferential annular groove of the magnet armature can maintain an axial distance from the separating ring when the required actuating force is applied, which preferably corresponds to approximately one to three times, particularly preferably twice the bottom width of the annular groove.
  • the annular groove running around the outer circumference of the magnet armature can, viewed in cross-section, be of essentially U-shaped design with walls running in a straight line.
  • the depth of the annular groove running around the outer circumference of the magnet armature can essentially correspond to the width of the annular groove.
  • the separating ring can transition outwards into two sloping boundary walls, one of which faces the pole sleeve with a greater incline and the other, with a lesser incline in comparison, faces the free end of the confirmation plunger.
  • the circumferential annular groove on the outer circumference of the magnet armature can remain behind the separating ring in any travel position of the magnet armature in its force-exerting actuation position.
  • the annular groove introduced on the end face of the magnet armature serving as a control groove, can encompass the actuating plunger and be introduced in the region of the outer third of the free end face of the magnet armature, which faces the actuating plunger.
  • the cross section of the annular groove can have a straight wall section which is perpendicular to the bottom surface, and an inclined wall section which runs obliquely in the direction of the actuating axis of the magnet armature, preferably at an angle thereto from about 30° to 60° degrees, more preferably from 45° degrees.
  • the course of the force-displacement characteristic curve can be adapted to specific purposes of use of the actuating magnet simply by changing one of the above-mentioned parameters of the actuating magnet.
  • Actuating magnets known from the prior art are used, for example, to control a valve for the purpose of regulating a media flow between connections provided in the housing of the valve.
  • a combination of an actuating magnet and a valve is an example of a proportional pressure control valve according to DE 10 2011 018 873 A1 referred.
  • an actuating magnet 10 which has a pole tube 12 in which a magnet armature 14 is guided in an armature space 16 so that it can move axially.
  • Pole tube 12 has a pole sleeve 18 and a pole piece 20, each of which is made of magnetizable material, in particular steel, and which are connected to one another via a separating ring 22, which creates a magnetic separation, configured as a recess in pole tube 12, between pole sleeve 18 and the pole piece 20 also limited.
  • the recess can be filled with a non-magnetizable material that is not shown in the figures.
  • the armature space 16 is delimited by parts of the pole sleeve 18, by the separating ring 22, by parts of the pole piece 20 and a cylindrical connecting piece 24, which is received by the free end 26 of the pole sleeve 18 and closes off the armature space 16 to the outside.
  • the actuating magnet 10 To move the magnet armature 14 ( 1 and 2 ) Inside the pole tube 12, at least in the direction of the pole piece 20, the actuating magnet 10 has a coil device 28 with a coil winding 30, which is arranged on the pole tube 12 and can be energized for an actuating process.
  • the coil device 28 is at least partially enclosed by a housing 32 which has an annular pole plate 34 enclosing the pole piece 20 .
  • actuating plunger 38 Attached to one end of magnet armature 14 is a rod-like actuating part in the form of an actuating plunger 38, aligned coaxially with magnet armature 14, and screwed in particular into magnet armature 14, which extends through a through bore 40 in pole piece 20, so that the part facing away from magnet armature 14 free end 42 of the actuating plunger 38 is accessible for actuating a device not shown in the figures, for example a valve (see DE 10 2011 018 873 A1 ).
  • the magnet armature 14 has for influencing a force-displacement characteristic 44, 46, 48 ( 3 ) a control means 50 ( Figure 1A ) in the form of an annular circumferential control groove 54 introduced into its outer circumference 52, which is referred to below as annular groove 54.
  • the annular groove 54 formed in the outer circumference 52 of the magnet armature 14 is essentially U-shaped when viewed in cross-section, namely with walls 58 running perpendicular to the longitudinal axis 56 of the actuating magnet 10 and arranged parallel to one another, which extend from a coaxial to the Longitudinal axis 56 of the actuating magnet 10 arranged, go out annular bottom surface 60, wherein the depth of the annular groove 54 corresponds to the width of the annular groove 54 substantially.
  • the annular groove 54 is formed in an area of the magnet armature 14 which, measured from an end face 62 of the magnet armature 14 with the actuating plunger 38 , extends between one fifth and one third of the overall axial length of the magnet armature 14 .
  • the magnet armature 14 like the Figures 1 and 1B can be seen, where the Figure 1B an enlarged view of the in 1 with B designated circular section shows, also for influencing the force-displacement characteristic ( 3 ) a control means 64 ( Figure 1B ) in the form of an annular circumferential control groove 66 introduced into the end face 62 of the magnet armature 14 with the actuating plunger 38, which is referred to below as a further annular groove 66.
  • the cross section of the introduced in the end face 62 of the magnet armature 14 further annular groove 66, starting from a bottom surface 68 running parallel to the end face 62 of the magnet armature 14, a rectilinear wall section 70, which is perpendicular to the bottom surface 68, and a sloping wall section 72, which is designed to run sloping in the direction of the actuating axis 56 of the magnet armature 14.
  • the angular value between the sloping wall section 72 and the actuation axis 56 is approximately 45 degrees.
  • the further annular groove 66 is provided in the area of the outer third of the free end face 62 of the magnet armature 14 .
  • annular groove 54 introduced into the outer circumference 52 of the magnet armature 14 and/or the further annular groove 66 introduced into the magnet armature 14 on the face side enclose the actuating plunger 38 in each case coaxially.
  • the separating ring 22 ( 1 and 2 ), starting from a cylindrical bottom part 74, in two sloping, annular boundary walls 76, 78 to the outside, one of which 76 with a greater inclination of the pole sleeve 18 and the other 78, with a smaller inclination, the free end 42 of the actuating plunger 38 faces.
  • the magnet armature 14 In each stroke position of the magnet armature 14, in particular in the end stroke position, i.e.
  • the annular groove 54 made in the magnet armature 14 on the outer circumference 52 holds in the direction of the end 80 of the magnet armature 14 facing away from the actuating plunger 38 and the groove on the front side in the magnet armature 14 introduced further annular groove 66 in the direction of the end 62 of the magnet armature 14 having the actuating plunger 38 in each case at least a slight axial distance from the bottom part 74 of the separating ring 22, the width of which is approximately 2.5 times the bottom width of the annular groove 54 in the outer circumference 52 of the Magnet armature 14 corresponds.
  • In 3 is in a coordinate system a force-displacement characteristic curve 82 known from the prior art, control means-free magnet armature and force-displacement characteristic curves 44, 46, 48 in the 1 and 2 shown magnet armature 14, which has introduced into its outer circumference 52 and/or into its end face 62 annular grooves 54, 66.
  • the force-displacement characteristic curve of the magnet armature free of control means is shown by means of a solid, dark characteristic curve 82, the Force-displacement characteristic curve of a magnet armature 14 with only one groove 54 introduced on its outer circumference 52 by means of a dashed characteristic curve 44, the force-displacement characteristic curve of a magnet armature 14 with exclusively a front-side groove 66 by means of a dotted characteristic curve 46 and the force-displacement
  • a groove 66 (characteristic curve 46) introduced on the end face 62 of the magnet armature 14 essentially causes a reduction in force, in particular the maximum force, in the region of the end stroke of the magnet armature 14 in comparison to a magnet armature without control means, whereas a groove introduced on the outer circumference 52 54 (characteristic curve 44) in addition to a further reduction in force in the area of the end stroke, in the area of the working stroke a longer working stroke distance with a force-displacement characteristic curve 44 running essentially horizontally.
  • At least one circumferential annular groove 54, 66 (characteristic curve 48) introduced into this.
  • these bring about a further reduction in force in the area of the end stroke and the working stroke of the magnet armature 14, as a result of which the difference between the maximum and minimum force of the force-displacement characteristic 48 in the area of the working stroke is particularly small is, so that in the area of the working stroke a particularly long working stroke distance with a force-displacement characteristic 48 running essentially horizontally can be generated.
  • the magnet armature 14 can, under the action of the annular grooves 54, 66, either hit the pole piece 20 or an anti-adhesive disk 84 provided, if appropriate, with a reduced actuating force, or even advance its end position while maintaining a gap-shaped axial distance from them return to the unactuated position.
  • the magnet armature 14 is guided in the pole tube 12 by means of a guide sleeve 90, which is arranged in an annular circumferential recess 92 on the outer circumference 52 of the magnet armature 14 and which surrounds the magnet armature 14 at its end region remote from the actuating plunger 38.
  • a further guide sleeve 94 is provided for the longitudinally movable guidance of the actuating plunger 38 in the pole piece 20, which is accommodated in a ring-shaped circumferential recess 96 in the form of an inner diameter enlargement in the end region of the through hole 40 of the pole piece 20 facing the magnet armature 14 .
  • annular circumferential depression 96 for further guide sleeve 94 is followed by annular circumferential depression 98 with a larger outer diameter, in which an anti-adhesive disk 84 encompassing actuating plunger 38 is arranged.
  • the pole piece 20 in particular in the respective image plane 1 and 2 two continuous equalization bores 100 running parallel to the actuation axis 56 for pressure equalization, which connect the outside of the actuation magnet 10 to the armature space 16 in which the magnet armature 14 is movably arranged.
  • the two compensating bores 100 each open out of the pole piece 20 in the direction of the magnet armature 14 at the height of the further annular groove 66 introduced into the end face of the magnet armature 14 .
  • a plug part (not shown in the figures) for energizing the coil device 28 which is at least partially encompassed by the pole sleeve 18 , is connected to the connection piece 24 .
  • the pole piece 20 On the outer circumference 52 of its free end 102, the pole piece 20 has a screw-in thread 104 for screwing the actuating magnet 10 into a valve block, not shown in the figures, for example.
  • the actuating magnet 10 shown is designed as a so-called “pushing magnet” which, when the coil winding 30 is energized, moves in the direction of the pole piece 20, starting from its initial stroke position in which it is in contact with the connection piece 24, until the latter is in its Endhubwolf near the anti-stick disk 84 or in contact with the anti-stick disk 84 arrives.
  • a resetting device which has an energy store in the form of a compression spring.
  • the compression spring can either be part of the actuated device, for example in the form of the valve (see DE 10 2011 018 873 A1 ), or be part of the actuating magnet 10, namely being supported with its one end on the magnet armature 14 and with its other end on the pole piece 20, with the actuating plunger 38 extending through the compression spring.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
EP22158762.9A 2021-03-16 2022-02-25 Aimant d'actionnement Pending EP4060694A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW112127298A TW202422741A (zh) 2022-02-25 2023-07-21 拾取和放置設備、系統和方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021001385.9A DE102021001385A1 (de) 2021-03-16 2021-03-16 Betätigungsmagnet

Publications (1)

Publication Number Publication Date
EP4060694A1 true EP4060694A1 (fr) 2022-09-21

Family

ID=80461714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22158762.9A Pending EP4060694A1 (fr) 2021-03-16 2022-02-25 Aimant d'actionnement

Country Status (2)

Country Link
EP (1) EP4060694A1 (fr)
DE (1) DE102021001385A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3635551A1 (de) * 1986-10-20 1988-04-28 Thomas Technik Ges Fuer Magnet Druckdichter elektro-hubmagnet
US20060001513A1 (en) * 2002-10-31 2006-01-05 Masashi Okubo Solenoid
EP1818951A1 (fr) * 2006-02-06 2007-08-15 MSG Mechatronic Systems GmbH Electroaimant de levage
DE102006021927A1 (de) * 2006-05-11 2007-11-15 Robert Bosch Gmbh Elektromagnet
US20100301978A1 (en) * 2009-06-01 2010-12-02 Denso Corporation Linear actuator
DE102011018873A1 (de) 2011-04-28 2012-10-31 Hydac Electronic Gmbh Pneumatisches Ventil und seine Verwendung für einen angeschlossenen Verbraucher
DE102013010833A1 (de) 2013-06-28 2014-12-31 Hydac Electronic Gmbh Elektromagnetische Betätigungsvorrichtung
US20200096130A1 (en) * 2018-09-24 2020-03-26 Rostra Precision Controls, Inc. Linear actuators for pressure-regulating valves

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2330839A1 (de) 1973-06-16 1975-01-09 Harting Elektro W Ankerlagerung in elektro-kolbenhubmagneten
DE3152448C2 (de) 1981-04-24 1984-09-13 Siemens AG, 1000 Berlin und 8000 München Tauchankermagnetsystem mit hohem Wirkungsgrad
DE102008032727A1 (de) 2008-07-11 2010-01-14 Robert Bosch Gmbh Hubmagnetanordnung und Ventilanordnung
DE102014013602B3 (de) 2014-09-18 2015-10-01 Hilite Germany Gmbh Hydraulikventil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3635551A1 (de) * 1986-10-20 1988-04-28 Thomas Technik Ges Fuer Magnet Druckdichter elektro-hubmagnet
US20060001513A1 (en) * 2002-10-31 2006-01-05 Masashi Okubo Solenoid
EP1818951A1 (fr) * 2006-02-06 2007-08-15 MSG Mechatronic Systems GmbH Electroaimant de levage
DE102006021927A1 (de) * 2006-05-11 2007-11-15 Robert Bosch Gmbh Elektromagnet
US20100301978A1 (en) * 2009-06-01 2010-12-02 Denso Corporation Linear actuator
DE102011018873A1 (de) 2011-04-28 2012-10-31 Hydac Electronic Gmbh Pneumatisches Ventil und seine Verwendung für einen angeschlossenen Verbraucher
DE102013010833A1 (de) 2013-06-28 2014-12-31 Hydac Electronic Gmbh Elektromagnetische Betätigungsvorrichtung
US20200096130A1 (en) * 2018-09-24 2020-03-26 Rostra Precision Controls, Inc. Linear actuators for pressure-regulating valves

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