EP2936510B1 - Système d'entraînement électromécanique et électrovanne - Google Patents

Système d'entraînement électromécanique et électrovanne Download PDF

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Publication number
EP2936510B1
EP2936510B1 EP12812869.1A EP12812869A EP2936510B1 EP 2936510 B1 EP2936510 B1 EP 2936510B1 EP 12812869 A EP12812869 A EP 12812869A EP 2936510 B1 EP2936510 B1 EP 2936510B1
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EP
European Patent Office
Prior art keywords
ring section
ring
electromechanical drive
air gap
drive unit
Prior art date
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EP12812869.1A
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German (de)
English (en)
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EP2936510A1 (fr
Inventor
Alexander Steck
Andreas BÜHLER
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Festo SE and Co KG
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Festo SE and Co KG
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Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP2936510A1 publication Critical patent/EP2936510A1/fr
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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
    • H01F7/14—Pivoting armatures

Definitions

  • the invention relates to an electromechanical drive device, in particular for the movement of a valve member, according to the preamble of claim 1.
  • Such an electromechanical drive device is made EP 1 033 736 A1 known.
  • the invention relates to a solenoid valve with such an electromechanical drive device.
  • a DC and AC solenoid in which a fixed magnetic core is provided with a solenoid and a movable armature is attached to a cantilever of the magnetic core.
  • a movable connection between the armature and the arm of the magnetic core is produced by means of a pin hinge.
  • the DE 1 972 126 U discloses a hinged armature magnet, in which at a middle leg of an E-shaped yoke a Magnet coil is mounted and a pivotable armature is provided, which can perform a pivoting movement in response to energization of the solenoid.
  • the pivotable armature is arranged on the side of the yoke, rectangular frame-shaped cover plates pivotally mounted by means of a rivet, wherein the contact of the armature ensures on the cover plates that regardless of the pivot position of the armature always the same magnetic resistance between the armature and yoke in the rivet is present.
  • the EP 1 033 736 A1 discloses a magnetic actuator comprising a magnetic circuit consisting of a ferromagnetic return iron having first and second legs approximately parallel to each other and connected across a transverse web, of a movable armature having one of its ends at the free end is hinged to the first leg and cooperates via its second end to the free end of the second leg, and a means for generating a magnetic field and which is capable of the armature rotationally effective between an open rest position of the armature, which corresponds to the normal operating state of the switching device , and an active position corresponding to the occurrence of an electrical fault in the switching device and in which the free end of the armature is held relative to the free end of the second leg in a position with minimum magnetic resistance.
  • the US 2004025949 A1 discloses a magnetic drive for a fluid flow control valve, the permanent magnet means for generating a magnetic flux, an armature which can assume two positions between four poles and a solenoid coil which is adapted to move the armature between the two positions.
  • the US 3,323,090 A discloses a rotary motor having a frame on which an armature is rotatably mounted, which is associated with a drive means, wherein the armature is provided in the frame for limited pivotal movement about a predetermined axis and wherein the drive means comprises two magnetic coils, which for magnetic interaction with Arms of the armature are formed, which are aligned transversely to a pivot axis of the armature.
  • the FR 2074891 discloses a magnetically operated torque or thrust motor in which the armature is held in a neutral position by polarizing magnets and in which deviations of the armature from its zero position can be effected by altering a control flux, with a zero-current adjuster of magnetic material so with respect to the armature is movably arranged that the interaction between its field and the field of polarizing magnets is variable and wherein the zero current setting a permanent magnet is mounted within a cup-shaped housing, which slipped over a magnetically non-conductive material existing capsule housing of the motor and relative to this both slide - And / or rotatable movable and lockable.
  • the object of the invention is to provide an electromechanical drive device and a solenoid valve, which have an improved switching behavior.
  • the first air gap is arranged in a central region of the volume surrounded by the magnetic coil, in particular in a middle third of this volume, to ensure a low-loss coupling of the magnetic field generated by the magnetic coil in both ring sections. It is advantageous if the air gap, regardless of the functional position of the electromechanical drive device, is always completely accommodated in the space volume surrounded by the magnetic coil, since fluctuations of the size of the air gap can be kept low for the coupling of the magnetic field from the magnetic coil into the ring yoke , In particular, by this arrangement of the air gap scattering losses for the magnetic field to be coupled can be kept low.
  • At least one first and one second size-variable air gap are formed between the first ring section and the second ring section.
  • ring portions are preferably arranged such that the two air gaps in each case undergo a, preferably in the same direction, size change in a pivoting movement of the second ring portion relative to the first ring portion.
  • a proportional or non-proportional change in size of the two air gaps can be provided for this purpose.
  • a pivot axis for the second ring portion is disposed at an end portion of the second ring portion. It can thus be achieved that the second air gap is always smaller than the first air gap.
  • a magnetic resistance between the first and the second ring section in the region of the second air gap is at least almost exclusively, in particular exclusively, dependent on the size of the second air gap and / or that the second ring section is in the region of the second Air gap always rests at least with a line contact on the first ring section.
  • a particularly simple construction of the ring yoke can be realized, since no measures for ensuring an air gap with a constant size must be taken.
  • the magnetic resistance between the two ring sections in the region of the second air gap does not exceed a predetermined level, wherein the maximum magnetic resistance by the line contact between the first and second ring section at maximum size of the Air gap is determined and reduced with decreasing size of the air gap.
  • a second air gap formed between the second annular section and the first annular section is arranged completely in a volume of space surrounded by a second magnetic coil, in particular in a middle third of this volume.
  • a low-loss coupling of the magnetic field into the ring yoke is ensured at least largely independently of the relative position of the two ring sections relative to one another for the second air gap.
  • the first ring portion and the second ring portion are hinged together and a hinge connection between the first ring portion and the second ring portion is formed for a motion-independent, constant magnetic resistance between the first ring portion and the second ring portion.
  • the magnetic resistance in the yoke is at least largely determined by the size of the first air gap, while the magnetic resistance in the region of the joint connection is at least largely independent of the position of the two ring sections to each other.
  • the first ring portion is U-shaped, in particular with a first U-leg, which is longer than a second U-leg.
  • both the first and the second ring section may be U-shaped. It can preferably be provided that the U-legs of the respective ring sections are each the same length.
  • the second ring portion between the first ring portion and a, in particular cutting-like design, bearing means and / or a, in particular elastically formed, pressure means is arranged, for an alignment of the second ring portion and / or for a force is formed on the second and first ring portion.
  • the bearing means serves to ensure a respectively definable position of the second ring portion relative to the first ring portion in all pivot positions, which can occupy the second ring portion.
  • the bearing means may in particular be a blade-like geometry whose cutting edge is aligned parallel to the pivot axis of the second ring section.
  • a pressing means may be provided, which exerts a pressing force on the second ring portion in the direction of the first ring portion, thereby ensuring a reliable positioning of the second ring portion relative to the first ring portion.
  • the pressure means is at least partially made of an elastic material.
  • a permanent magnet to be arranged in a first magnetic circuit formed by the first and second annular sections, which is assigned to the first or second annular section and / or a third annular section is assigned to the annular yoke, which at least one, in particular size-variable, air gap forms with the first or the second ring portion and forms a second magnetic circuit with the first and / or the second ring portion.
  • a magnetic bias can be caused in the yoke, which can be used, for example, that the second ring portion with respect to the first ring portion without a power supply to the solenoid assumes a predeterminable preferred position.
  • an additional magnetic circuit is thereby formed, which is preferably arranged such that the second ring section remains in at least one switching position, preferably in two different switching positions, without the need for an additional energy input into the solenoid coil is required.
  • the second ring portion associated with a spring device which is operatively connected to the first ring portion and determines a preferred position for the second ring portion relative to the first ring portion, when no energization of the solenoid is provided.
  • a bistable drive device can hereby be made available in which the second annular section remains in two different switching positions without energy input to the magnetic coil.
  • the second ring section has at least one curved surface in the region of the first air gap and / or that the ring sections consist of several Metal sheet layers are constructed and / or that at least one of the ring sections has a rectangular, in particular square, cross-section.
  • the at least one curved surface may in particular be aligned concentrically to the pivot axis of the second ring section and / or have a radius which corresponds to a distance between the pivot axis of the second ring section and the surface.
  • the object of the invention is achieved according to a second aspect by a solenoid valve according to claim 11.
  • the solenoid valve comprises a valve housing having at least one fluid supply inlet port and at least one fluid discharge outlet port and movably receiving therein a valve member adapted for sealing engagement with a valve seat associated with the input port or outlet port for influencing fluid flow between the valve port at least one input terminal and the at least one output terminal is formed through the valve housing, with an electromechanical drive device according to one of the preceding claims.
  • valve member is formed as a sealing means on a side facing away from the first ring portion surface of the second ring portion or by a movement-coupled to the second ring portion actuator is controllable.
  • electromechanical drive device 1 comprises a hollow-wound magnetic coil 2, which is assigned to a ring yoke 3 made of a magnetic field conductive material, in particular of a ferromagnetic material.
  • the ring yoke 3 is an example of a first ring portion 4 and a second ring portion 5 constructed, which are pivotally mounted to each other, wherein a pivot axis 6 perpendicular to the plane of the FIG. 1 is aligned and indicated by an axis symbol.
  • the magnet coil 2 is assigned to the first ring section 4, in particular fixed to the first ring section 4, so that the second ring section 5 is designed to be movable relative to the magnet coil 2.
  • an exemplary spring device 7 which engages projections on the ring sections 4 and 5 and presses them apart.
  • a pressing means is provided, which is exemplarily designed as an elastic tube 8 made of an elastic material and which is supported on a housing (not shown) for the electromechanical drive device 1.
  • the hose 8 is received between the housing, not shown, and the second ring section 5 such that the hose 8 can press the second ring section 5 against the first ring section 4.
  • a first air gap 9 and a second air gap 10 are formed between the ring sections 4 and 5. Since the pivot axis 6 extends exemplarily along a contact line between the first and the second ring section 4, 5, a ratio between the size of the first air gap 9 and the size of the second air gap 10 during a pivoting movement from the open position shown in one Closed position in which the two air gaps 9, 10 at least almost completely disappear, at least almost constant.
  • the pivoting movement of the second ring section 5 relative to the first ring section 4 about the pivot axis 6 and against the spring force applied by the spring device 7 is effected by energizing the magnetic coil 2.
  • the first air gap is located in a space surrounded by the example hollow magnetic coil 2 space volume, whereby an advantageous coupling of the magnetic flux is ensured in the yoke 3.
  • the second ring section 5 is due to the restoring force of the spring means 7 back to the rest position according to the FIG. 1 emotional.
  • an electromechanical drive device 21 not belonging to the invention embodiment of an electromechanical drive device 21 includes functionally identical components such as the electromechanical drive device 1, so that these components are each designated by reference numerals increased by 20 and will not be explained again below.
  • FIG. 2 omitted a representation of the spring means and the pressure device.
  • a permanent magnet 31 is attached to the electromechanical drive device 21 in the region of the second air gap 30 on the first ring section 24.
  • the permanent magnet is magnetized such that the outgoing field lines extend along the longer leg 32 of the U-shaped annular portion 24, as indicated by the arrow in the FIG. 2 is hinted at.
  • a third, exemplarily U-shaped trained annular portion 33 is provided, which is spaced and immovable relative to the annular yoke 23 and the ring yoke 23 forms a third and possibly a fourth air gap 34, 35.
  • the fourth air gap 35 is formed in particular variable in size due to the mobility of the second ring portion 25.
  • the forces of attraction produced by the permanent magnet 31 between the first and second ring sections 24, 25 are insufficient to overcome the restoring force of the spring device (not shown), so that the second ring section assumes the rest position shown without energizing the magnetic coil 22.
  • the outgoing magnetic flux from the permanent magnet 31 flows through the third and fourth air gaps 34, 35 through the third ring portion 33, since the magnetic resistance of this second magnetic circuit is less than the magnetic resistance of the annular yoke 22 certain first magnetic circuit.
  • solenoid valves is the respective drive means coincident with the drive means 1 according to the FIG. 1 provided with a spring means, not shown, which is adapted to cause without a power supply to the respective magnetic coil a spacing of the respective second ring portion relative to the respective first annular portion. Accordingly, the representations of the FIGS. 3 to 6 so to understand that the respective magnetic coil or the respective magnetic coils are energized, so that the air gap or the air gaps between the respective first ring portion and the respective second ring portion is minimal or are.
  • solenoid valve 40 is an electromechanical drive device 41 is provided, which corresponds to the electromechanical drive device 1, with the exception of a second solenoid coil 42, so that the same reference numerals as in the electromechanical drive device 1 are used here for functionally identical components. Further, the magnetic coils 2, 42 and the first ring portion 4 are surrounded by a drive housing 43, which is provided for electrical insulation and mechanical protection of these components.
  • the drive housing 43 is adjoined by a valve housing 44, on which an inlet connection 45 and an outlet connection 46 for a supply or removal of a fluid, in particular a gaseous or liquid medium, are formed.
  • a valve chamber 47 is formed between the input port 45 and the output port 46, which is traversed by the fluid.
  • a valve seat 48 is formed in the valve chamber 47 at the output port 46, which serves as a contact surface for a sealing engagement of serving as a valve member 49 sealing element made of a rubber-elastic material.
  • the valve member 49 is attached to an outer surface of the second ring portion 5.
  • valve member 49 from the second ring portion 5 between a rest position in which the valve member 49 sealingly abuts the valve seat 48 due to the action of a spring device, not shown, without energization of the magnetic coils 2, 42, and a functional position in which a free fluid flow between the input terminal 45 and the output terminal 46 is made possible by appropriate energization of the magnetic coils 2, 42 are moved.
  • a bearing means 50 with a substantially triangular cross-section is exemplarily formed on the valve housing 44.
  • the bearing means 50 extends with a uniform cross-section transverse to the plane of representation of Figure 3 and thereby forms a bearing blade 51.
  • the bearing blade 51 is in a linear contact with the second ring section 5 and presses the second ring section 5 against the first ring section 4. Due to the interaction of the bearing blade 51 with the second ring section 5, this is held in a predeterminable position relative to the first ring section 4.
  • this type of storage is sufficient.
  • valve housing 64 which can be mounted in the same manner as the valve housing 44 to the drive housing 43, the valve member 69 is formed as a diaphragm which limits the valve space 67 between the input terminal 65 and the output terminal 66.
  • the membrane is circumferentially sealed on the valve housing 64 fixed.
  • a plunger 60 On a surface of the valve member 69 facing the second ring section 5, a plunger 60, in particular in one piece, is formed. This plunger 60 allows a central introduction of force from the second ring section 5 on the membrane, which can thus be pressed surface sealingly in the functional position on the valve seat 68.
  • valve housing 74 is an alternative development of the valve housing 64, wherein the valve member 79 is also formed as a membrane and peripherally circumferentially sealed in the valve housing 74 is added.
  • An introduction of movement from the second ring section 5 on the valve member 79 is carried out with a rocker 70 mounted in the valve housing 74.
  • This rocker 70 is supported by a spring means designed as a compression spring 71 and a cam 72 on the second ring section 5.
  • the rocker 70 and the valve member 79 is energized upon energization of the at least one, not shown, magnetic coil in the illustrated functional position in which a fluid flow from the input port 75 to the output port 76 is possible.
  • the spring device not shown, causes a, in the FIG.
  • valve member and the rocker allow the valve member and the rocker a mutual sealing of two gel-like arranged to the pivot axis of the rocker output terminals, so that in the rest position in the same manner as in the embodiment according to the FIG. 5 a seal of the first output terminal results and when energized the two magnetic coils due to the restoring action of the spring means is a pivotal movement of the rocker. This seals the second output port. at Cancellation of the energization of the two magnetic coils, the release of the second output terminal and the re-closure of the first output terminal.
  • the bearing means 90 is exemplified as a solid-state bearing between a formed on the valve housing 84 bearing tongue 92 and the second ring portion 5 is formed.
  • the bearing means 90 is made as a flexurally elastic plate, for example of a plastic or metal material and in each case with the valve housing 84 and the second ring portion 5, in particular cohesively connected.
  • this is designed as a solid-body joint between the first and the second ring portion.
  • valve member 89 is formed as peripherally circumferentially sealed membrane and is movably coupled to the second ring portion 5 of a slide 91 movably mounted in the valve housing 84.
  • bearing means and valve members according to the embodiments described above can be combined with each other in any manner, the described and illustrated combinations are each exemplary.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Claims (12)

  1. Dispositif d'entraînement électromécanique, en particulier servant à déplacer un organe de vanne (49 ; 69 ; 79 ; 89), avec au moins une bobine magnétique (2, 42) à enroulement creux et une culasse annulaire (3), qui comprend une première section annulaire (4) et une deuxième section annulaire (5), dans lequel la bobine magnétique (2 ; 42) entoure par endroits la première section annulaire (4) et dans lequel la deuxième section annulaire (5) est montée de manière mobile par pivotement par rapport à la première section annulaire (4), dans lequel la première section annulaire (4) et la deuxième section annulaire (5) sont réalisées de telle manière qu'un premier entrefer (9) réalisé entre la première section annulaire (4) et la deuxième section annulaire (5) est disposé en totalité dans un volume spatial entouré par la bobine magnétique (2, 42), en particulier dans un tiers médian dudit volume spatial, caractérisé en ce que deux bobines magnétiques (2, 42) sont associées à la première section annulaire (4).
  2. Dispositif d'entraînement électromécanique selon la revendication 1, caractérisé en ce qu'au moins un premier entrefer et un deuxième entrefer (9, 10) respectivement à dimension variable sont réalisés entre la première section annulaire (4) et la deuxième section annulaire (5).
  3. Dispositif d'entraînement électromécanique selon la revendication 2, caractérisé en ce qu'une résistance magnétique entre la première et la deuxième section annulaire (4, 5) dans la zone du deuxième entrefer (10) dépend au moins quasiment exclusivement, en particulier exclusivement, de la dimension du deuxième entrefer (10), et/ou que la deuxième section annulaire (5) dans la zone du deuxième entrefer (10) repose systématiquement au moins avec un contact linéaire au niveau de la première section annulaire (4).
  4. Dispositif d'entraînement électromécanique selon la revendication 1 ou 2, caractérisé en ce qu'un deuxième entrefer (10) réalisé entre la deuxième section annulaire (5) et la première section annulaire (4) est disposé en totalité dans un volume spatial entouré par la deuxième bobine magnétique (42), en particulier dans un tiers médian dudit volume spatial.
  5. Dispositif d'entraînement électromécanique selon la revendication 1, caractérisé en ce que la première section annulaire (4) et la deuxième section annulaire (5) sont reliées l'une à l'autre de manière articulée, et une liaison articulée est réalisée entre la première section annulaire (4) et la deuxième section annulaire (5) pour une résistance magnétique constante indépendante du déplacement entre la première section annulaire (4) et la deuxième section annulaire (5).
  6. Dispositif d'entraînement électromécanique selon la revendication 1, 2 ou 3, caractérisé en ce que la première section annulaire (4) est réalisée en forme de U, en particulier est réalisée avec une première branche en U, qui est plus longue qu'une deuxième branche en U.
  7. Dispositif d'entraînement électromécanique selon la revendication 1, caractérisé en ce que les deux bobines magnétiques (2, 42) sont disposées de manière parallèle l'une par rapport à l'autre et de manière espacée l'une de l'autre.
  8. Dispositif d'entraînement électromagnétique selon l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième section annulaire (5) est disposée entre la première section annulaire (4) et un moyen de palier (50 ; 70 ; 80 ; 90) réalisé en particulier à la manière d'une lame et/ou un moyen de compression (8) réalisé en particulier de manière élastique, qui est réalisé pour une orientation de la deuxième section annulaire (5 ; 25) et/ou pour une application de force sur la deuxième et la première section annulaire (4, 5).
  9. Dispositif d'entraînement électromagnétique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'est disposé dans un premier circuit magnétique formé par la première et par la deuxième section annulaire, un aimant permanent, qui est associé à la première ou à la deuxième section annulaire, et/ou qu'est associée à la culasse annulaire une troisième section annulaire, qui réalise au moins un entrefer en particulier à dimension variable avec la première ou la deuxième section annulaire et réalise un deuxième circuit magnétique avec la première et/ou la deuxième section annulaire.
  10. Dispositif d'entraînement électromagnétique selon l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième section annulaire (5) présente dans la zone du premier entrefer (9) au moins une surface incurvée, et/ou que les sections annulaires (4, 5) sont élaborées à partir de plusieurs couches de tôle métallique, et/ou qu'au moins une des sections annulaires (4, 5) présente une section transversale rectangulaire, en particulier carrée.
  11. Electrovanne avec un carter de vanne (44 ; 64 ; 74 ; 84), qui comprend au moins un raccord d'entrée (45 ; 65 ; 75 ; 85) pour une amenée de fluide et au moins un raccord de sortie (46 ; 66 ; 76 ; 86) pour une évacuation de fluide et dans lequel est logé de manière mobile un organe de vanne (49 ; 69 ; 79 ; 89), qui est réalisé pour un appui d'étanchéification au niveau d'un siège de vanne (48 ; 68 ; 78 ; 88) associé à l'au moins un raccord d'entrée (45 ; 65 ; 75 ; 85) ou à l'au moins un raccord de sortie (46 ; 66 ; 76 ; 86), servant à influencer un flux de fluide entre le raccord d'entrée (45 ; 65 ; 75 ; 85) et le raccord de sortie (46 ; 66 ; 76 ; 86) à travers le carter de vanne (44 ; 64 ; 74 ; 84), avec un dispositif d'entraînement (1) électromécanique selon l'une quelconque des revendications précédentes.
  12. Electrovanne selon la revendication 11, caractérisée en ce que l'organe de vanne (49 ; 69 ; 79 ; 89) est réalisé sous la forme d'un moyen d'étanchéité au niveau d'une surface, opposée à la première section annulaire (4), de la deuxième section annulaire (5) ou peut être piloté par un organe d'actionnement (70; 72 ; 91) couplé en déplacement à la deuxième section annulaire (5).
EP12812869.1A 2012-12-21 2012-12-21 Système d'entraînement électromécanique et électrovanne Active EP2936510B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/005356 WO2014094809A1 (fr) 2012-12-21 2012-12-21 Système d'entraînement électromécanique et électrovanne

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EP2936510A1 EP2936510A1 (fr) 2015-10-28
EP2936510B1 true EP2936510B1 (fr) 2018-11-21

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EP12812869.1A Active EP2936510B1 (fr) 2012-12-21 2012-12-21 Système d'entraînement électromécanique et électrovanne

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EP (1) EP2936510B1 (fr)
CN (1) CN105190797A (fr)
WO (1) WO2014094809A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE536909C (de) 1931-10-28 Bbc Brown Boveri & Cie Schaltmagnet fuer Gleich- und Wechselstrom
US3323090A (en) * 1964-06-04 1967-05-30 Obrien D G Inc Fluid seal for a torque motor
DE1972126U (de) 1967-08-11 1967-11-09 Binder Magnete K G Klappankermagnet.
US3587016A (en) * 1970-01-29 1971-06-22 Abex Corp Null adjuster for magnetically operated torque motors
US7021603B2 (en) * 1998-10-08 2006-04-04 Wladyslaw Wygnaski Electromagnetic actuator and integrated actuator and fluid flow control valve
FR2790593B1 (fr) * 1999-03-02 2001-05-04 Schneider Electric Ind Sa Actionneur magnetique a palette en particulier pour disjoncteur et disjoncteur equipe d'un tel actionneur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP2936510A1 (fr) 2015-10-28
CN105190797A (zh) 2015-12-23
WO2014094809A1 (fr) 2014-06-26

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