EP1607988B1 - Actuator, in particular for actuating valves - Google Patents

Actuator, in particular for actuating valves Download PDF

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Publication number
EP1607988B1
EP1607988B1 EP05007959A EP05007959A EP1607988B1 EP 1607988 B1 EP1607988 B1 EP 1607988B1 EP 05007959 A EP05007959 A EP 05007959A EP 05007959 A EP05007959 A EP 05007959A EP 1607988 B1 EP1607988 B1 EP 1607988B1
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EP
European Patent Office
Prior art keywords
guide channel
armature
cross
actuation part
actuating
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EP05007959A
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German (de)
French (fr)
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EP1607988A2 (en
EP1607988A3 (en
Inventor
Patrick Fuchs
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Hydac Electronic GmbH
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Hydac Electronic GmbH
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Publication of EP1607988A2 publication Critical patent/EP1607988A2/en
Publication of EP1607988A3 publication Critical patent/EP1607988A3/en
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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

  • switching magnets These switching devices, which are referred to in the jargon as switching magnets, are exemplary in the DE 101 04 998 A1 described and freely available on the market in a variety of embodiments.
  • the actuating part of the switching magnet is essentially formed of a tubular bolt which covers a predetermined distance when electrical excitation of the coil winding via a connectable to the plug plate of a connector plug device connector and thereby initiates a switching or actuation operation, for example in a valve connected from the outside Shutting off and guiding fluid flows.
  • the solenoid is therefore de-energized, is regularly reset by a return spring, which is arranged in the switching device itself and / or preferably on the valve to be actuated, for a renewed switching operation when energizing the coil of the armature.
  • a switching device in which between the adjacent opposite sides of the armature and pole core, an anti-adhesive device is arranged, which comprises the actuating part with a disc-shaped base at a predeterminable radial distance.
  • Said non-stick device has a connecting part extending in the axial direction of the actuating device, which likewise comprises the actuating part with a predeterminable radial spacing and which engages in a recess of the same for establishing a firm connection with the pole core.
  • the pot-shaped anti-stick device is securely fixed to the pole core and consequently to the fixed parts of the actuating device and can not perform such a movement following the armature during its movement and unintentionally release.
  • the present invention seeks to further improve the known actuators while maintaining their advantages that the reliability is further increased.
  • This object is achieved by an actuator with the features of claim 1 in its entirety.
  • the middle section of the operating part spread in cross section and guided along a propagated in diameter track portion of the guide channel, a captive is realized such that actuated by the magnet armature driven unintentionally leave the guide channel and thus the pole core.
  • the widened track section of the guide channel opens into the anchor space, wherein a pot-like non-stick device is provided at the location of the passage, regardless of the geometric configuration of the anti-stick device, in any case, tilting or tilting along the rod-like actuating part, based on its guideway, avoided, so that it can not come to an obstruction during the return movement of the magnet armature.
  • the non-stick device which is preferably magnetically ineffective, is so far securely fixed to the pole core and thus to the fixed parts of the actuator and can not the den Magnetic arm during movement perform subsequent movement.
  • the outer peripheral shape of the actuating part is selected to the inner peripheral shape of the guide channel such that at least one fluid-conducting connection is made from the outside to the armature space, so that the necessary fluid and / or pressure-carrying connection from the valve interior to the interior of the actuator in the form of the armature space can be made via the guide channel , which is present anyway to safely store the operating part in Polkern core.
  • fluid or through holes in the pole core can therefore be dispensed with, which on the one hand helps reduce the cost and on the other hand space is saved, which is an advantage especially in tight spaces, for example in the automotive industry.
  • said guide channel is part of standardizable pole cores, a basic requirement for a modular design of the entire actuating device is fulfilled, so that with a small number of individual components of the actuating device, such as the pole core in stepped magnitudes, a variety of valve switching - and to cover operating tasks.
  • the cross-sectional area of the guide channel is bounded by arcuate and / or rectilinear wall segments, wherein the cross-sectional area of the actuating part is deviating therefrom limited to form the respective fluid-carrying connection of rectilinear and / or arcuate further wall segments and wherein at least partially the other wall segments to the Wall segments of the guide channel when moving the operating part are guided. Accordingly, a variety of ways are opened by corresponding design of the respective wall segments of actuating part and guide channel to realize the respective fluid-conducting connection, yet a secure guidance of the operating member along the wall segments of the guide channel is ensured.
  • the cross-sectional area of the guide channel is circular and that based on its cross section, the actuating part is a rod-shaped polygon.
  • the pertinent embodiment can be realized in a particularly cost-effective manner and can be due to the remaining free cross-sectional area correspondingly large-sized, fluid-carrying connections between the valve interior and armature space free. Flow losses due to turbulent flow are avoided due to the rectilinear fluid connections.
  • the polygonal shape of the actuating part is, for example, a square at least in a middle distance section.
  • the actuating part engages loosely in the armature via a centering means, wherein preferably the centering means has tapered centering walls, which open into a cup-like extension.
  • the actuating part of the magnet armature is mechanically decoupled via said coupling point in the form of the centering and the actuating member is preferably taken only when operating the armature such that actuation of the switching valve.
  • the opposite return movement is preferably held by a return spring in the valve, the actuating member along the centering on the armature and reset such.
  • the in the Fig.1 shown in longitudinal section actuator which is also referred to in the jargon with switching or actuating magnet, has a housing 10 with a coil body 12 arranged therein with coil winding.
  • the pertinent bobbin comprises at least partially a pole tube 14, which by means of a separation point 16 in the form of a Weld or in the form of a released position is magnetically decoupled from a pole core 18 substantially.
  • a magnet armature 20 is guided in an armature space 22, which cooperates at its one free end face with a rod-like actuating part 24 for actuating fluid valves (not shown) of conventional design.
  • the pole core 18 is provided at its free end with a connecting flange 26 with a threaded section, not shown.
  • a plug member 28 is provided, which is preferably fixedly connected via a potting compound 30 with the housing 10.
  • the pole core 18 on the outer peripheral side of a pole plate 32 and at the opposite end, the pole tube 14 has a Hubbegrenzung 34 for the armature 20, which may also be provided with a Nothandbetuschist (not shown), in case of failure of the stream yet to operate the actuator and thus the valve.
  • the armature 20 is moved to its actuated position, in the direction of the Fig.1 Seen from a right stop position in a left, the actuation representation of the Fig.1 equivalent.
  • the armature 20 takes the rod-shaped actuating member 24, the free end 36 for an actuation operation on the valve not shown at least partially from the housing 10 as shown in the Fig.1 exit.
  • the armature 20 is provided in its pertinent axial travel direction along the longitudinal axis 38 of the actuator with at least one fluid equalization channel 40, which allows, in the armature or chamber chamber 22 located fluid within the armature chamber 22 in dependence the displacement position of the armature 20 to move back and forth in order to avoid such obstacles during operation.
  • the coil of the bobbin 12 is no longer energized and the return movement is forcibly guided via a return spring (not shown), which moves as part of the valve on the valve stem, the rod-like actuating member 24 and thus the armature 20 back.
  • the rod-like actuating part 24 already described above passes through the pole core 18 along a guide channel 44, the center axis of which runs along the longitudinal axis 38 of the actuating device.
  • the outer peripheral shape of the operating part 24 to the inner peripheral shape of the guide channel 44 is selected such that at least one fluid-conducting connection 46 coming from the outside, so coming from the interior of the valve to the armature space 22 is made.
  • the cross-sectional area of the guide channel 44 is bounded by arcuate wall segments 48, and the cross-sectional area of the actuating part 24 is deviated therefrom to form the respective fluid-conducting connection 46 of rectilinear further wall segments 50.
  • the polygonal shape of the actuating part 24 is formed at least in a middle section 52 as a square, with this end section further track sections 54,56 join this middle section 52, in which the edge courses are flattened to form guideways 58. Accordingly, the respective guideway 58 is flat and bounded on both sides by Eckkantenverinstrumentn the polygon. Accordingly, on the one hand, an optimized fluid-conducting cross-section is achieved for the respective fluid-conducting connection 46, according to the embodiment according to FIGS Fig. 1 and 2 a total of four fluid-carrying connections 46 diametrically around each other to the longitudinal axis 38 around the operating part 24 around group.
  • the middle section 52 of the operating part 24 is widened in cross section and guided along a correspondingly widened in diameter path portion 60 of the guide channel 44.
  • the operating member 24 can be easily accommodate in the guide channel 44 and the rest is such a captive achieved for the actuating part 24 in the pole core 18.
  • the axial length ratios in the region of the middle section 52 are, however, in any case to be chosen such that when the armature 20 his in the Fig.1 shown left actuating position occupies the front end face of the widening of the operating part 24 does not abut the corresponding opposite wall parts of the pole core 18, but here occupies a predetermined distance.
  • the rod-like actuating member 24 is loosely guided at its end facing the armature 20 in a recess of the magnet armature 20, via a centering means 62.
  • the centering means 62 is provided with tapered Zentriermayn 64, which open in the direction of the armature 20 in a pin-like extension 66, wherein the described embodiment is fulfilled equally for the actuating member 24 and for the front end of the armature 20.
  • About the centering 62 is a kind of loose coupling point realized, which ensures that upon actuation of the magnet armature 20, the actuating member 24 can also be carried without inhibition and it can not come in the area of the system of operating part 24 with pole core 18 to tilting.
  • the pole tube 14 is formed substantially cylindrical and terminates with its one free end with the pole core 18, which then form a common outer peripheral surface of the same diameter.
  • On the opposite side of the pole tube 14 is connected via a sealing ring 68 across the stroke limiter 34 and as a fixing means, as in Fig.1 represented, inwardly crimped in a groove-shaped depression of the stroke limiter 34.
  • the stroke limiter 34 can be completed with a cap 70.
  • fluid and / or pressure equalization can be brought about via the fluid-carrying connections 46 between the interior of the valve and the interior of the actuating device in the form of the armature space 22. Because of this fluid media connection, both the valve device and the operation are free of interference and inhibition the actuator possible. On additional connection holes in the pole core 18, which could also adversely affect the magnetic flux harmful, can be dispensed with.
  • the solution according to the invention can be realized inexpensively and takes up little installation space due to the central guidance of actuating part 24 with fluid-carrying connections 46.

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

Abstract

The liner electromagnetic actuator for use with valves has a body with an actuation coil assembly [12] and an inset pole core [18] and tube [14] within which an armature moves [20]. A coupling channel [40] allows any fluid to move freely between the ends of the armature and so prevents fluid loading.

Description

Die Erfindung betrifft eine Betätigungsvorrichtung, insbesondere zum Betätigen von außen her anschließbaren Ventilen, gemäß der Merkmalsausgestaltung des Oberbegriffes des Patentanspruches 1.The invention relates to an actuating device, in particular for actuating externally connectable valves, according to the feature configuration of the preamble of claim 1.

Dahingehende Schaltvorrichtungen, die man in der Fachsprache auch als Schaltmagnete bezeichnet, sind beispielhaft in der DE 101 04 998 A1 beschrieben und auf dem Markt in einer Vielzahl von Ausführungsformen frei erhältlich. Das Betätigungsteil des Schaltmagneten ist im wesentlichen aus einem rohrförmigen Bolzen gebildet, der bei elektrischer Erregung der Spulenwicklung über einen, an die Steckerplatte eines Anschlußsteckers anschließbaren Gerätesteckers eine vorgebbare Wegstrecke zurücklegt und hierbei einen Schalt- oder Betätigungsvorgang auslöst, beispielsweise bei einem von außen angeschlossenen Ventil zum Absperren und Führen von Fluidströmen. Entfällt die Bestromung, ist der Schaltmagnet also stromlos, wird regelmäßig über eine Rückstellfeder, die in der Schaltvorrichtung selbst und/oder vorzugsweise am zu betätigenden Ventil angeordnet ist, für einen erneuten Schaltvorgang beim Bestromen der Spule der Magnetanker rückgestellt.These switching devices, which are referred to in the jargon as switching magnets, are exemplary in the DE 101 04 998 A1 described and freely available on the market in a variety of embodiments. The actuating part of the switching magnet is essentially formed of a tubular bolt which covers a predetermined distance when electrical excitation of the coil winding via a connectable to the plug plate of a connector plug device connector and thereby initiates a switching or actuation operation, for example in a valve connected from the outside Shutting off and guiding fluid flows. If the current supply is omitted, the solenoid is therefore de-energized, is regularly reset by a return spring, which is arranged in the switching device itself and / or preferably on the valve to be actuated, for a renewed switching operation when energizing the coil of the armature.

Durch die nachveröffentlichte DE 103 27 209 ist eine Schaltvorrichtung bekannt, bei der zwischen den einander benachbart gegenüberliegenden Seiten von Magnetanker und Polkern eine Antihafteinrichtung angeordnet ist, die das Betätigungsteil mit einem scheibenförmigen Grundteil unter einem vorgebbaren Radialabstand umfaßt. Die genannte Antihafteinrichtung weist ein in axialer Richtung der Betätigungsvorrichtung sich erstreckendes Verbindungsteil auf, das gleichfalls das Betätigungsteil mit einem vorgebbaren radialen Abstand umfaßt und das zum Herstellen einer festen Verbindung mit dem Polkern in eine Ausnehmung desselben eingreift. Dergestalt ist die topfförmige Antihafteinrichtung sicher am Polkern und mithin an den feststehenden Teilen der Betätigungsvorrichtung festgelegt und kann dergestalt keine, den Magnetanker bei seiner Bewegung nachfolgende Verfahrbewegung ausführen und sich ungewollt lösen.By the post-published DE 103 27 209 a switching device is known in which between the adjacent opposite sides of the armature and pole core, an anti-adhesive device is arranged, which comprises the actuating part with a disc-shaped base at a predeterminable radial distance. Said non-stick device has a connecting part extending in the axial direction of the actuating device, which likewise comprises the actuating part with a predeterminable radial spacing and which engages in a recess of the same for establishing a firm connection with the pole core. In such a way, the pot-shaped anti-stick device is securely fixed to the pole core and consequently to the fixed parts of the actuating device and can not perform such a movement following the armature during its movement and unintentionally release.

Bei all den genannten bekannten Betätigungsvorrichtungen ist ein Fluid-oder Druckausgleichskanal im Polkern selbst vorgesehen, der in der Art einer Fluid- oder Druckausgleichsbohrung die fluidführende Verbindung mit den druckführenden Teilen des Ventils, insbesondere in Form eines Hydraulikventils, und dem Ankerraum herstellt, in dem der Magnetanker bewegbar geführt ist. Mithin ist es bei den bekannten Lösungen notwendig, zusätzlich zu dem Führungskanal, in dem das Betätigungsteil innerhalb des Polkerns geführt ist, in denselbigen eine weitere Kanalverbindung vorzusehen, um Hemmnisse beim Betrieb der Betätigungsvorrichtung zu vermeiden. Neben den damit einhergehenden zusätzlichen Herstellkosten für die Betätigungsvorrichtung aufgrund der genannten zusätzlichen Durchgangsbohrung baut darüber hinaus insbesondere in radialer Richtung die Betätigungsvorrichtung größer auf, um den notwendigen Platz für das Anbringen der Druckausgleichsverbindung zu schaffen. Auch ist man mit den dahingehenden Baukomponenten einer Betätigungsvorrichtung in der Ausgestaltung dann weitgehend festgelegt, so dass dem Grunde nach für jede Ventilkonzeptlösung eine eigenständige Betätigungsvorrichtung vorzuhalten ist. Dies führt aber wiederum zu erhöhten Bereitstellungs- und Lagerkosten.In all the known actuating devices mentioned a fluid or pressure equalization channel is provided in the pole core itself, the fluid-carrying connection with the pressure-carrying parts of the valve, in particular in the form of a hydraulic valve, and the armature space produces in the manner of a fluid or pressure equalization hole, in which Magnet armature is movably guided. Thus, it is necessary in the known solutions, in addition to the guide channel, in which the actuating part is guided within the Polkerns in denselbigen provide a further channel connection in order to avoid obstacles in the operation of the actuator. In addition to the associated additional manufacturing costs for the Actuator due to the said additional through hole also builds the actuator more largely in the radial direction, in order to provide the necessary space for mounting the pressure equalization connection. Also, one is then largely determined with the pertinent structural components of an actuating device in the embodiment, so that the reason for each valve concept solution is to maintain a separate actuator. However, this in turn leads to increased supply and storage costs.

Um diesen Nachteilen zu begegnen ist bei einer gattungsgemäßen Betätigungsvorrichtung nach der EP-A-1 313 110 , welche als nächstliegender Stand der Technik angesehen wird, bereits vorgeschlagen worden, ein mit dem Magnetanker der Betätigungsvorrichtung zusammenwirkendes stangenförmiges Betätigungsteil für das Betätigen des jeweiligen Ventils von seiner Außenumfangsgestalt zur Innenumfangsgestalt des Führungskanals der Betätigungsvorrichtung derart zu wählen, dass mindestens eine fluidführende Verbindung von außen zum Ankerraum hergestellt ist. Bei der bekannten Lösung ist die Querschnittsfläche des Führungskanals gleichfalls kreisrund gewählt, wobei auf seinen Querschnitt bezogen, das Betätigungsteil ein stangenförmiger Mehrkant ist. Ferner wird bei der bekannten Lösung um eine verläßliche Führung für das Betätigungsteil im Führungskanal sicherzustellen, ausgehend von einem mittleren Streckenabschnitt die Kantenverläufe der Mehrkantenform des Betätigungsteils abgeplattet unter Bildung von gemeinsamen Führungsbahnen mit dem Führungskanal der Betätigungsvorrichtung.To counter these disadvantages is in a generic actuator after the EP-A-1 313 110 which is considered as the closest prior art, has already been proposed to select a cooperating with the armature of the actuator rod-shaped actuating member for actuating the respective valve from its outer peripheral shape to the inner peripheral shape of the guide channel of the actuator such that at least one fluid-conducting connection from the outside to Anchor space is made. In the known solution, the cross-sectional area of the guide channel is also chosen to be circular, with respect to its cross-section, the actuating part is a rod-shaped polygon. Furthermore, in the known solution to ensure a reliable guide for the actuating part in the guide channel, starting from a central stretch of the edge profiles of the polygonal shape of the operating part flattened to form common tracks with the guide channel of the actuator.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, die bekannten Betätigungsvorrichtungen unter Beibehalten ihrer Vorteile dahingehend weiter zu verbessern, dass die Funktionssicherheit noch weiter erhöht wird. Eine dahingehende Aufgabe löst eine Betätigungsvorrichtung mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Based on this prior art, the present invention seeks to further improve the known actuators while maintaining their advantages that the reliability is further increased. This object is achieved by an actuator with the features of claim 1 in its entirety.

Dadurch, dass gemäß dem kennzeichnenden Teil des Patentanspruches 1 die jeweilige Führungsbahn eben verlaufend ist und beidseitig von Eckkantenverläufen des Mehrkant begrenzt ist, ist ein verbessertes Führungsverhalten des Betätigungsteils im Ankerraum erreicht und insbesondere kommt es nicht ungewollt zu Drehbewegungen des Betätigungsteils innerhalb des Polkerns quer zu dessen Längsverfahrachse.The fact that according to the characterizing part of claim 1, the respective guideway is flat and is bounded on both sides by Eckkantenverläufen the polygon, an improved leadership behavior of the operating part in the armature space is achieved and in particular it is not unintentional to rotational movements of the operating part within the pole core transversely to the Längsverfahrachse.

Dadurch, dass weiter erfindungsgemäß der mittlere Streckenabschnitt des Betätigungsteils im Querschnitt verbreitet und entlang eines im Durchmesser verbreiteten Bahnabschnittes des Führungskanals geführt ist, ist eine Verliersicherung dergestalt realisiert, dass das Betätigungsteil vom Magnetanker angesteuert nicht ungewollt den Führungskanal und mithin den Polkern verlassen kann.Characterized in that further according to the invention, the middle section of the operating part spread in cross section and guided along a propagated in diameter track portion of the guide channel, a captive is realized such that actuated by the magnet armature driven unintentionally leave the guide channel and thus the pole core.

Dadurch, dass bei der erfindungsgemäßen Betätigungsvorrichtung anspruchsgemäß ferner vorgesehen ist, dass der verbreiterte Bahnabschnitt des Führungskanals in den Ankerraum mündet, wobei an der Stelle des dahingehenden Überganges eine topfartige Antihafteinrichtung vorgesehen ist, ist unabhängig von der geometrischen Ausgestaltung der Antihafteinrichtung jedenfalls ein Verkippen oder ein Verkanten längs des stangenartigen Betätigungsteils, bezogen auf seine Führungsbahn, vermieden, so dass bei der Rückstellbewegung des Magnetankers es nicht zu einem Hemmnis kommen kann. Die Antihafteinrichtung, die vorzugsweise magnetisch unwirksam ist, ist insoweit sicher am Polkern und mithin an den feststehenden Teilen der Betätigungsvorrichtung festgelegt und kann dergestalt keine den Magnetanker bei seiner Bewegung nachfolgende Verfahrbewegung ausführen.Due to the fact that, in the actuating device according to the invention, it is further provided that the widened track section of the guide channel opens into the anchor space, wherein a pot-like non-stick device is provided at the location of the passage, regardless of the geometric configuration of the anti-stick device, in any case, tilting or tilting along the rod-like actuating part, based on its guideway, avoided, so that it can not come to an obstruction during the return movement of the magnet armature. The non-stick device, which is preferably magnetically ineffective, is so far securely fixed to the pole core and thus to the fixed parts of the actuator and can not the den Magnetic arm during movement perform subsequent movement.

Die Außenumfangsgestalt des Betätigungsteils ist zur Innenumfangsgestalt des Führungskanals derart gewählt, dass mindestens eine fluidführende Verbindung von außen zum Ankerraum hergestellt ist, so dass die notwendige fluid- und/oder druckführende Verbindung vom Ventilinneren zum Inneren der Betätigungsvorrichtung in Form des Ankerraumes über den Führungskanal erfolgen kann, der ohnehin vorhanden ist, um das Betätigungsteil im Polkern sicher-verfahrbar zu lagern. Auf zusätzlich einzubringende Fluid- oder Durchgangsbohrungen im Polkern kann daher verzichtet werden, was zum einen die Herstellkosten senken hilft und zum anderen wird Bauraum eingespart, was insbesondere bei beengten Platzverhältnissen, beispielsweise in der Fahrzeugindustrie, ein Vorteil ist. Da der genannte Führungskanal Teil von standardisierbaren Polkernen ist, ist dergestalt eine Grundvoraussetzung erfüllt für einen modularen Aufbau der gesamten Betätigungsvorrichtung, so dass sich mit einer geringen Anzahl an Einzelkomponenten der Betätigungsvorrichtung, wie dem Polkern in gestuften Größenordnungen, sich eine Vielzahl von Ventil-, Schalt- und Betätigungsaufgaben abdecken lassen.The outer peripheral shape of the actuating part is selected to the inner peripheral shape of the guide channel such that at least one fluid-conducting connection is made from the outside to the armature space, so that the necessary fluid and / or pressure-carrying connection from the valve interior to the interior of the actuator in the form of the armature space can be made via the guide channel , which is present anyway to safely store the operating part in Polkern core. In addition to be introduced fluid or through holes in the pole core can therefore be dispensed with, which on the one hand helps reduce the cost and on the other hand space is saved, which is an advantage especially in tight spaces, for example in the automotive industry. Since said guide channel is part of standardizable pole cores, a basic requirement for a modular design of the entire actuating device is fulfilled, so that with a small number of individual components of the actuating device, such as the pole core in stepped magnitudes, a variety of valve switching - and to cover operating tasks.

Bei der Betätigungsvorrichtung ist die Querschnittsfläche des Führungskanals von bogenförmigen und/oder geradlinig verlaufenden Wandsegmenten begrenzt, wobei die Querschnittsfläche des Betätigungsteils hiervon abweichend unter Bildung der jeweiligen fluidführenden Verbindung von geradlinigen und/oder bogenförmigen weiteren Wandsegmenten begrenzt ist und wobei zumindest teilweise die weiteren Wandsegmente an den Wandsegmenten des Führungskanals beim Bewegen des Betätigungsteils geführt sind. Demgemäß sind eine Vielzahl an Möglichkeiten eröffnet, durch entsprechende Gestaltung der jeweiligen Wandsegmente von Betätigungsteil und Führungskanal die jeweilige fluidführende Verbindung zu realisieren, wobei dennoch eine sichere Führung des Betätigungsteils längs den Wandsegmenten des Führungskanals gewährleistet ist. Vorzugsweise ist dabei des weiteren vorgesehen, dass die Querschnittsfläche des Führungskanals kreisrund ist und dass auf seinen Querschnitt bezogen das Betätigungsteil ein stangenförmiger Mehrkant ist. Die dahingehende Ausgestaltung ist in besonders kostengünstiger Weise realisierbar und läßt aufgrund der freibleibenden Querschnittsfläche entsprechend groß dimensionierte, fluidführende Verbindungen zwischen Ventilinnerem und Ankerraum frei. Strömungsverluste durch turbulente Strömung sind aufgrund der geradlinig verlaufenden Fluidverbindungen dergestalt vermieden.In the actuator, the cross-sectional area of the guide channel is bounded by arcuate and / or rectilinear wall segments, wherein the cross-sectional area of the actuating part is deviating therefrom limited to form the respective fluid-carrying connection of rectilinear and / or arcuate further wall segments and wherein at least partially the other wall segments to the Wall segments of the guide channel when moving the operating part are guided. Accordingly, a variety of ways are opened by corresponding design of the respective wall segments of actuating part and guide channel to realize the respective fluid-conducting connection, yet a secure guidance of the operating member along the wall segments of the guide channel is ensured. Preferably, it is further provided that the cross-sectional area of the guide channel is circular and that based on its cross section, the actuating part is a rod-shaped polygon. The pertinent embodiment can be realized in a particularly cost-effective manner and can be due to the remaining free cross-sectional area correspondingly large-sized, fluid-carrying connections between the valve interior and armature space free. Flow losses due to turbulent flow are avoided due to the rectilinear fluid connections.

Bei der Betätigungsvorrichtung ist die Mehrkantform des Betätigungsteils beispielsweise zumindest in einem mittleren Streckenabschnitt ein Vierkant.In the case of the actuating device, the polygonal shape of the actuating part is, for example, a square at least in a middle distance section.

Ferner ist vorgesehen, dass das Betätigungsteil lose in den Magnetanker über ein Zentriermittel eingreift, wobei vorzugsweise das Zentriermittel konisch zulaufende Zentrierwände aufweist, die in eine topfartige Verlängerung münden. Dergestalt ist das Betätigungsteil von dem Magnetanker mechanisch über die genannte Kupplungsstelle in Form des Zentriermittels entkoppelt und das Betätigungsteil wird vorzugsweise nur beim Betätigen des Magnetankers dergestalt mitgenommen, dass eine Betätigung des Schaltventils erfolgt. Bei der gegenläufigen Rückstellbewegung wird jedoch vorzugsweise über eine Rückstellfeder im Ventil das Betätigungsteil längs des Zentriermittels am Magnetanker gehalten und dergestalt rückgestellt.It is further provided that the actuating part engages loosely in the armature via a centering means, wherein preferably the centering means has tapered centering walls, which open into a cup-like extension. In this way, the actuating part of the magnet armature is mechanically decoupled via said coupling point in the form of the centering and the actuating member is preferably taken only when operating the armature such that actuation of the switching valve. In the opposite return movement, however, is preferably held by a return spring in the valve, the actuating member along the centering on the armature and reset such.

Im folgenden wird die erfindungsgemäße Betätigungsvorrichtung anhand eines Ausführungsbeispiels nach der Zeichnung näher erläutert. Dabei zeigen in prinzipieller und nicht maßstäblicher Darstellung die

Fig. 1
einen Längsschnitt durch die Betätigungsvorrichtung;
Fig.2
einen Schnitt längs der Linie I - I in Fig.1.
In the following the actuator according to the invention will be explained in more detail with reference to an embodiment of the drawing. This show in principle and not to scale representation of the
Fig. 1
a longitudinal section through the actuator;
Fig.2
a section along the line I - I in Fig.1 ,

Die in der Fig.1 im Längsschnitt dargestellte Betätigungsvorrichtung, die man in der Fachsprache auch mit Schalt- oder Betätigungsmagnet bezeichnet, weist ein Gehäuse 10 auf mit einem darin angeordneten Spulenkörper 12 mit Spulenwicklung. Der dahingehende Spulenkörper umfaßt zumindest teilweise ein Polrohr 14, das mittels einer Trennstelle 16 in Form einer Schweißnaht oder in Form einer freigelassenen Stelle magnetisch von einem Polkern 18 im wesentlichen entkoppelt ist. Längs des Polrohres 14 ist ein Magnetanker 20 in einem Ankerraum 22 geführt, der an seinem einen freien stirnseitigen Ende mit einem stangenartigen Betätigungsteil 24 zusammenwirkt zum Betätigen von Fluidventilen (nicht dargestellt) üblicher Bauart. Zum Anschließen des dahingehenden Ventils ist der Polkern 18 an seinem freien Ende mit einem Anschlußflansch 26 mit einer nicht näher dargestellten Gewindestrecke versehen. Zum Bestromen der Spulenwicklung des Spulenkörpers 12 ist ein Steckerteil 28 vorgesehen, das vorzugsweise über eine Vergußmasse 30 mit dem Gehäuse 10 fest verbunden ist. An seinem einen freien Ende weist der Polkern 18 außenumfangsseitig eine Polplatte 32 auf und am gegenüberliegenden Ende weist das Polrohr 14 eine Hubbegrenzung 34 für den Magnetanker 20 auf, die auch mit einer Nothandbetätigung (nicht dargestellt) versehen sein kann, um bei Ausfall des Stromes dennoch die Betätigungsvorrichtung und mithin das Ventil betätigen zu können.The in the Fig.1 shown in longitudinal section actuator, which is also referred to in the jargon with switching or actuating magnet, has a housing 10 with a coil body 12 arranged therein with coil winding. The pertinent bobbin comprises at least partially a pole tube 14, which by means of a separation point 16 in the form of a Weld or in the form of a released position is magnetically decoupled from a pole core 18 substantially. Along the pole tube 14, a magnet armature 20 is guided in an armature space 22, which cooperates at its one free end face with a rod-like actuating part 24 for actuating fluid valves (not shown) of conventional design. To connect the pertinent valve, the pole core 18 is provided at its free end with a connecting flange 26 with a threaded section, not shown. For energizing the coil winding of the bobbin 12, a plug member 28 is provided, which is preferably fixedly connected via a potting compound 30 with the housing 10. At its one free end, the pole core 18 on the outer peripheral side of a pole plate 32 and at the opposite end, the pole tube 14 has a Hubbegrenzung 34 for the armature 20, which may also be provided with a Nothandbetätigung (not shown), in case of failure of the stream yet to operate the actuator and thus the valve.

Wird über das Steckerteil 28 die Spulenwicklung und mithin die Spule bestromt, wird der Magnetanker 20 in seine betätigte Stellung verfahren, und zwar in Blickrichtung auf die Fig.1 gesehen von einer rechten Anschlagstellung in eine linke, die der Betätigungsdarstellung nach der Fig.1 entspricht. Bei der dahingehenden Verfahrbewegung nimmt der Magnetanker 20 das stangenförmige Betätigungsteil 24 mit, dessen freies Ende 36 für einen Betätigungsvorgang an dem nicht näher dargestellten Ventil zumindest teilweise aus dem Gehäuse 10 gemäß der Darstellung nach der Fig.1 austritt. Der Magnetanker 20 ist in seiner dahingehenden axialen Verfahrrichtung entlang der Längsachse 38 der Betätigungsvorrichtung mit mindestens einem Fluidausgleichskanal 40 versehen, der es erlaubt, in dem Anker- oder Kammerraum 22 befindliches Fluid innerhalb des Ankerraumes 22 in Abhängigkeit der Verfahrstellung des Magnetankers 20 hin und her zu bewegen, um dergestalt Hemmnisse im Betrieb zu vermeiden. Für eine Rückstellbewegung des Magnetankers 20 aus seiner in der Fig.1 dargestellten linken Stellung nach rechts ist die Spule des Spulenkörpers 12 nicht länger bestromt und die Rückstellbewegung erfolgt zwangsgeführt über eine Rückstellfeder (nicht dargestellt), die als Teil des Ventils über den Ventilstößel das stangenartige Betätigungsteil 24 und mithin den Magnetanker 20 zurück verfährt.Is energized via the plug part 28, the coil winding and thus the coil, the armature 20 is moved to its actuated position, in the direction of the Fig.1 Seen from a right stop position in a left, the actuation representation of the Fig.1 equivalent. During the traversing movement of the armature 20 takes the rod-shaped actuating member 24, the free end 36 for an actuation operation on the valve not shown at least partially from the housing 10 as shown in the Fig.1 exit. The armature 20 is provided in its pertinent axial travel direction along the longitudinal axis 38 of the actuator with at least one fluid equalization channel 40, which allows, in the armature or chamber chamber 22 located fluid within the armature chamber 22 in dependence the displacement position of the armature 20 to move back and forth in order to avoid such obstacles during operation. For a return movement of the armature 20 from its in the Fig.1 shown left position to the right, the coil of the bobbin 12 is no longer energized and the return movement is forcibly guided via a return spring (not shown), which moves as part of the valve on the valve stem, the rod-like actuating member 24 and thus the armature 20 back.

Selbst bei Wegfall des Stromes kann es aber aufgrund von Restmagnetismusvorgängen im Polkern 18 und in der Polplatte 32 dazu kommen, dass der Magnetanker 20 mit seiner einen freien Stirnseite an der ihm zugewandten, benachbarten Stirnseite des Polkerns 18 haften bleibt. Um dies zu vermeiden, ist es nachveröffentlichter Stand der Technik, zwischen die beiden Stirnseiten innerhalb des Ankerraums 22 eine Antihafteinrichtung in Form einer topfförmigen Antihaftscheibe 42 anzuordnen, die mit einem radialen Abstand das stangenartige Betätigungsteil 24 umfaßt. Aufbau und Funktion der genannten Antihaftscheibe 42 ist ausführlich in der DE 103 27 209 beschrieben, so dass an dieser Stelle hierauf nicht mehr näher eingegangen wird.However, even with the elimination of the current, it may happen due to residual magnetism processes in the pole core 18 and in the pole plate 32 that the magnet armature 20 with its one free end side adheres to the adjacent thereto end face of the pole core 18. To avoid this, it is post-published prior art, between the two end faces within the armature space 22 to arrange a non-stick device in the form of a cup-shaped non-stick disc 42 which includes the rod-like actuating member 24 with a radial distance. Structure and function of said non-stick disc 42 is described in detail in the DE 103 27 209 described, so that at this point will not be discussed in more detail.

Das vorstehend bereits beschriebene stangenartige Betätigungsteil 24 durchgreift den Polkern 18 entlang eines Führungskanals 44, dessen Mittenachse entlang der Längsachse 38 der Betätigungsvorrichtung verläuft. Die Außenumfangsgestalt des Betätigungsteils 24 zur Innenumfangsgestalt des Führungskanals 44 ist dabei derart gewählt, dass mindestens eine fluidführende Verbindung 46 von außen, also vom Inneren des Ventils kommend, zum Ankerraum 22 hergestellt ist. Die Querschnittsfläche des Führungskanals 44 ist dabei von bogenförmigen Wandsegmenten 48 begrenzt, und die Querschnittsfläche des Betätigungsteils 24 ist hiervon abweichend unter Bildung der jeweiligen fluidführenden Verbindung 46 von geradlinigen weiteren Wandsegmenten 50 begrenzt. Zur Bildung der jeweils fluidführenden Verbindung 46 zwischen Ventilinnerem und Ankerraum 22 sind auch andere Querschnittsgeometrien denkbar, beispielsweise indem der Führungskanal 44 einen quadratischen Querschnitt aufweist, in dem dann ein zylindrisches Betätigungsteil 24 geführt ist. Fertigungstechnisch und mithin kostengünstiger ist es jedoch, die Querschnittsfläche des Führungskanals 44 kreisrund zu wählen, und dass Betätigungsteil 24 in der Art eines stangenförmigen Mehrkants gemäß der Darstellung nach den Fig.1 und 2 auszugestalten.The rod-like actuating part 24 already described above passes through the pole core 18 along a guide channel 44, the center axis of which runs along the longitudinal axis 38 of the actuating device. The outer peripheral shape of the operating part 24 to the inner peripheral shape of the guide channel 44 is selected such that at least one fluid-conducting connection 46 coming from the outside, so coming from the interior of the valve to the armature space 22 is made. The cross-sectional area of the guide channel 44 is bounded by arcuate wall segments 48, and the cross-sectional area of the actuating part 24 is deviated therefrom to form the respective fluid-conducting connection 46 of rectilinear further wall segments 50. To form the respective fluid-carrying connection 46 between the valve interior and armature space 22, other cross-sectional geometries are also conceivable, for example in that the guide channel 44 has a square cross section in which a cylindrical actuating part 24 is then guided. Manufacturing technology and therefore more cost-effective, however, it is to choose the cross-sectional area of the guide channel 44 circular, and that operating part 24 in the manner of a rod-shaped polygon as shown in the Fig.1 and 2 embody.

Wie sich insbesondere aus der Fig.1 ergibt, ist die Mehrkantform des Betätigungsteils 24 zumindest in einem mittleren Streckenabschnitt 52 als Vierkant ausgebildet, wobei sich an diesen mittleren Streckenabschnitt 52 endseitig weitere Streckenabschnitte 54,56 anschließen, bei denen die Kantenverläufe unter Bildung von Führungsbahnen 58 abgeplattet sind. Demgemäß ist die jeweilige Führungsbahn 58 eben und beidseitig von Eckkantenverläufen des Mehrkants begrenzt. Demgemäß ist zum einen ein optimierter fluidführender Querschnitt für die jeweilige fluidführende Verbindung 46 erreicht, wobei gemäß der Ausgestaltung nach den Fig. 1 und 2 sich insgesamt vier fluidführende Verbindungen 46 diametral einander zur Längsachse 38 gegenüberliegend um das Betätigungsteil 24 herumgruppieren.As can be seen in particular from the Fig.1 results, the polygonal shape of the actuating part 24 is formed at least in a middle section 52 as a square, with this end section further track sections 54,56 join this middle section 52, in which the edge courses are flattened to form guideways 58. Accordingly, the respective guideway 58 is flat and bounded on both sides by Eckkantenverläufen the polygon. Accordingly, on the one hand, an optimized fluid-conducting cross-section is achieved for the respective fluid-conducting connection 46, according to the embodiment according to FIGS Fig. 1 and 2 a total of four fluid-carrying connections 46 diametrically around each other to the longitudinal axis 38 around the operating part 24 around group.

Wie des weiteren die Fig.1 zeigt, ist der mittlere Streckenabschnitt 52 des Betätigungsteils 24 im Querschnitt verbreitert und entlang eines im Durchmesser korrespondierend verbreiterten Bahnabschnittes 60 des Führungskanals 44 geführt. Dergestalt läßt sich das Betätigungsteil 24 einfach im Führungskanal 44 unterbringen und im übrigen ist dergestalt eine Verliersicherung für das Betätigungsteil 24 im Polkern 18 erreicht. Die axialen Längenverhältnisse im Bereich des mittleren Streckenabschnittes 52 sind aber jedenfalls derart zu wählen, dass, wenn der Magnetanker 20 seine in der Fig.1 gezeigte linke Betätigungsstellung einnimmt, das vordere stirnseitige Ende der Verbreiterung des Betätigungsteils 24 nicht an den korrespondierend gegenüberliegenden Wandteilen des Polkerns 18 anstößt, sondern hier noch einen vorgebbaren Abstand einnimmt. Vergleichbares gilt bei der Rückstellbewegung, bei der sich der Magnetanker 20 von seiner in der Fig.1 gezeigten linken Endstellung in die rechte bewegt; im dahingehenden Fall sollte die Verbreiterung des Betätigungsteils 24 nicht an der freien Stirnseite der Antihaftscheibe 42 anstoßen, um dergestalt ihre Lage innerhalb des Führungskanals 44 nicht zu beeinträchtigen.How the other Fig.1 shows, the middle section 52 of the operating part 24 is widened in cross section and guided along a correspondingly widened in diameter path portion 60 of the guide channel 44. In this way, the operating member 24 can be easily accommodate in the guide channel 44 and the rest is such a captive achieved for the actuating part 24 in the pole core 18. The axial length ratios in the region of the middle section 52 are, however, in any case to be chosen such that when the armature 20 his in the Fig.1 shown left actuating position occupies the front end face of the widening of the operating part 24 does not abut the corresponding opposite wall parts of the pole core 18, but here occupies a predetermined distance. The same applies to the return movement, in which the armature 20 of his in the Fig.1 shown left end position moves to the right; In this case, the broadening of the operating part 24 should not abut the free end face of the non-stick disc 42 so as not to affect their position within the guide channel 44.

Das stangenartige Betätigungsteil 24 ist an seinem dem Magnetanker 20 zugewandten Ende lose in einer Ausnehmung des Magnetankers 20 geführt, und zwar über ein Zentriermittel 62. Wie insbesondere die Darstellung nach der Fig.1 zeigt, ist das Zentriermittel 62 mit konisch zulaufenden Zentrierwänden 64 versehen, die in Richtung des Magnetankers 20 in eine zapfenartige Verlängerung 66 münden, wobei die beschriebene Ausgestaltung gleichermaßen für das Betätigungsteil 24 erfüllt ist als auch für das stirnseitige Ende des Magnetankers 20. Über das Zentriermittel 62 ist eine Art lose Kupplungsstelle realisiert, die sicherstellt, dass beim Betätigen des Magnetankers 20 das Betätigungsteil 24 auch hemmfrei mitgeführt werden kann und es nicht im Bereich der Anlage von Betätigungsteil 24 mit Polkern 18 zu Verkantungen kommen kann. Auch wenn sich der Magnetanker 20 beim Betrieb der Vorrichtung von dem Betätigungsteil 24 lösen sollte, wäre dergestalt über das Zentriermittel 62 ein Ankuppelvorgang von Magnetanker 20 mit Betätigungsteil 24 problemlos möglich. Gegenüber den früher bekannten Lösungen, bei denen das Betätigungsteil einstückige Komponente des Magnetankers war, ist somit der funktionssichere Betrieb der gesamten Betätigungsvorrichtung auch über längere Einsatzdauern hinweg, deutlich erhöht.The rod-like actuating member 24 is loosely guided at its end facing the armature 20 in a recess of the magnet armature 20, via a centering means 62. As in particular the illustration of the Fig.1 shows the centering means 62 is provided with tapered Zentrierwänden 64, which open in the direction of the armature 20 in a pin-like extension 66, wherein the described embodiment is fulfilled equally for the actuating member 24 and for the front end of the armature 20. About the centering 62 is a kind of loose coupling point realized, which ensures that upon actuation of the magnet armature 20, the actuating member 24 can also be carried without inhibition and it can not come in the area of the system of operating part 24 with pole core 18 to tilting. Even if the magnet armature 20 should become detached from the actuating part 24 during operation of the device, a coupling process of magnet armature 20 with actuating part 24 would be possible without problems via the centering means 62. Compared with the previously known solutions, in which the actuating part integral component was the magnet armature, thus the functionally reliable operation of the entire actuator even over longer periods of use, significantly increased.

Das Polrohr 14 ist im wesentlichen zylindrisch ausgebildet und schließt mit seinem einen freien Ende mit dem Polkern 18 ab, wobei diese dann eine gemeinsame Außenumfangsfläche gleichen Durchmessers bilden. Auf der gegenüberliegenden Seite ist das Polrohr 14 über einen Dichtring 68 übergreifend mit der Hubbegrenzung 34 verbunden und als Festlegemittel, wie in Fig.1 dargestellt, nach innen in eine nutförmige Vertiefung der Hubbegrenzung 34 eingebördelt. Nach außen hin kann die Hubbegrenzung 34 mit einer Abdeckkappe 70 abgeschlossen sein.The pole tube 14 is formed substantially cylindrical and terminates with its one free end with the pole core 18, which then form a common outer peripheral surface of the same diameter. On the opposite side of the pole tube 14 is connected via a sealing ring 68 across the stroke limiter 34 and as a fixing means, as in Fig.1 represented, inwardly crimped in a groove-shaped depression of the stroke limiter 34. Outwardly, the stroke limiter 34 can be completed with a cap 70.

Mit der erfindungsgemäßen Lösung läßt sich über die fluidführenden Verbindungen 46 ein Fluid- und/oder Druckausgleich herbeiführen zwischen dem Inneren des Ventils und dem Inneren der Betätigungsvorrichtung in Form des Ankerraums 22. Aufgrund dieser Fluidmedienverbindung ist ein störungs- und hemmfreier Betrieb sowohl der Ventileinrichtung als auch der Betätigungsvorrichtung möglich. Auf zusätzliche Verbindungsbohrungen im Polkern 18, was darüber hinaus den magnetischen Fluß schädlich beeinträchtigen könnte, kann somit verzichtet werden. Die erfindungsgemäße Lösung läßt sich kostengünstig realisieren und nimmt wenig Bauraum ein aufgrund der zentralen Führung von Betätigungsteil 24 mit fluidführenden Verbindungen 46.With the solution according to the invention, fluid and / or pressure equalization can be brought about via the fluid-carrying connections 46 between the interior of the valve and the interior of the actuating device in the form of the armature space 22. Because of this fluid media connection, both the valve device and the operation are free of interference and inhibition the actuator possible. On additional connection holes in the pole core 18, which could also adversely affect the magnetic flux harmful, can be dispensed with. The solution according to the invention can be realized inexpensively and takes up little installation space due to the central guidance of actuating part 24 with fluid-carrying connections 46.

Claims (4)

  1. An actuator, in particular for actuating valves that can be connected from the outside, comprising a housing (10) and a coil body (12) with a coil winding disposed within the latter that comprises at least partially a pole tube (14) to the one free end of which there is connected a pole core (18), comprising an armature (20) guided at least in the pole tube (14) within an armature space (22) and that is provided with an actuation part (24) for actuating the respective valve that passes through the pole core (18) along a guide channel (44), the outer circumferential form of the actuation part (24) being chosen in relation to the inner circumferential form of the guide channel (44) such that at least one fluid-conveying connection (46) from the outside to the armature space (22) is established, the cross-sectional area of the guide channel (44) being delimited by wall segments (48) extending in an arch and/or in a straight line, the cross-sectional area of the actuation part (24), deviating from this, being delimited by further straight and/or arched wall segments (50) thus forming the respective fluid-conveying connection (46), at least partially the further wall segments (50) being guided along the wall segments (48) of the guide channel (44) when the actuation part (24) is moved, the cross-sectional area of the guide channel (44) being circular, in relation to its cross-section the actuation part (24) being a rod-shaped polygon, and end sections (54, 56) being connected to a central section (52) of the polygon with which the edge lines flatten out thus forming guideways (58), characterised in that the respective guideway (58) is level and is delimited on both sides by corner edge lines of the polygon, that the central section (52) of the actuation part (24) has a broadened cross-section and is guided along a path section (60) of the guide channel (44) with a broadened diameter, and that the broadened path section (60) of the guide channel (44) opens out into the armature space (22) and at the point of this cross-over has a cup-shaped anti-adhesive device (42).
  2. The actuator according to Claim 1, characterised in that the actuation part (24) engages loosely in the armature (20) by means of centering means (62).
  3. The actuator according to Claim 2, characterised in that the centering means (62) has conically tapering centering walls (64) which open out into a plug-like extension (66).
  4. The actuator according to any of Claims 1 to 3, characterised in that the pole tube (14) is connected by its one free end to the pole core (18), and that the latter form a common outer circumferential area with the same diameter.
EP05007959A 2004-06-15 2005-04-12 Actuator, in particular for actuating valves Not-in-force EP1607988B1 (en)

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DE102004028871 2004-06-15
DE102004028871A DE102004028871A1 (en) 2004-06-15 2004-06-15 Actuating device, in particular for actuating valves

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EP1607988A3 EP1607988A3 (en) 2008-02-20
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DE102011053033B4 (en) * 2011-08-26 2020-06-04 Hilite Germany Gmbh Hydraulic valve
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EP1607988A2 (en) 2005-12-21
ATE529869T1 (en) 2011-11-15
EP1607988A3 (en) 2008-02-20

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