EP0463394B1 - Electromagnetically actuated directional valve - Google Patents

Electromagnetically actuated directional valve Download PDF

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Publication number
EP0463394B1
EP0463394B1 EP91108757A EP91108757A EP0463394B1 EP 0463394 B1 EP0463394 B1 EP 0463394B1 EP 91108757 A EP91108757 A EP 91108757A EP 91108757 A EP91108757 A EP 91108757A EP 0463394 B1 EP0463394 B1 EP 0463394B1
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EP
European Patent Office
Prior art keywords
valve
pressure medium
pilot
housing
channel
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.)
Expired - Lifetime
Application number
EP91108757A
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German (de)
French (fr)
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EP0463394A1 (en
Inventor
Wolgang Spalt
Rolf Dipl.-Ing. Meier
Claude Dipl.-Ing. Pietsch
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0463394A1 publication Critical patent/EP0463394A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/0857—Electrical connecting means, e.g. plugs, sockets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0814—Monoblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0817—Multiblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B2013/0428—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with switchable internal or external pilot pressure source

Definitions

  • the invention is based on a directional valve according to the type of the main claim.
  • an electromagnetically actuated directional control valve in which the actual directional control valve (main valve) is mounted with its valve housing on a connecting plate.
  • This connection plate is provided with channels for the supply and discharge of pressure medium.
  • two electromagnetically operable pilot valves are arranged side by side in this connection plate, which are connected to the housing of the directional control valve via channels in the connection plate.
  • One of these pilot valves is connected to one of the pressure spaces on one of the sides of the control spool of the directional valve.
  • Such a directional control valve has the disadvantage that, in addition to the valve housing, a complex connection plate with pressure medium channels is required.
  • the pressure medium routing between pilot valves and main valve through this connection plate is complex and the space required is large.
  • the changeover from internal pressure medium supply to external control pressure medium supply or vice versa presents considerable difficulties.
  • the directional control valve according to the invention with the characterizing features of the main claim has the advantage that the pilot valves are mounted on one side on the valve housing, whereby only an electrical connection part is necessary. This reduces the number of electrical contacts.
  • such a directional control valve is shorter than a valve with pilot control units arranged on both sides, and the overall height is also lower due to the omission of the intermediate plate.
  • the directional control valve can also be switched from self-control to external control by simply changing a seal.
  • FIG. 1 An embodiment of the invention is shown in the description and drawing below.
  • the latter shows in Figure 1 a perspective view of a directional control valve with two pilot valves, in Figure 2 a section through this valve and in Figure 3 a section in the direction III-III of Figure 2.
  • Figure 4 shows a section in the direction IV-IV of Figure 2 5 shows a section VV corresponding to section III-III through a modification of the directional valve.
  • the electromagnetically actuated directional valve has a housing 10 in which a continuous longitudinal bore 11 is formed. Several cutting disks 12 to 17 are inserted in this longitudinal bore, between which the control slide 18 is guided. This has two elongated annular grooves 19, 20. Between two adjacent control disks 12 to 17, a bore 22 to 26 opens, which are connected to consumers A, B, S, atmosphere R and pressure medium source P via a base plate, not shown.
  • the control slide is actuated with the aid of two pistons 27, 28 which are guided on both sides of its end faces in the longitudinal bore 11 and are sealed by seals 29A, 29B and are acted upon there via pressure chambers 30, 31.
  • the longitudinal bore 11 is closed on one side by a cover 32, in which a channel 33 is formed, which is connected to a longitudinal bore 34 in the housing 10, which in turn is connected to a channel 35 in an intermediate flange 36.
  • the channel 35 is connected to a pressure chamber 38, which is formed in a housing 39 of a pilot valve 41 fastened to the intermediate flange 36.
  • a valve seat 42, 43 is formed, between which there is an elongated cylindrical valve body 44.
  • a channel 46 which has a connection to the atmosphere, opens at the lower valve seat 43.
  • a channel 48 opens, which leads to a channel 49 in the intermediate flange 36, which in turn is connected to a channel 50, which penetrates into the longitudinal bore 11, namely between the cutting disks 14 and 15. If the electromagnet is not energized, the valve body 44 is pressed against the upper valve seat 42 by the force of a spring 47.
  • the channel 50 is connected via the channel 49 and a channel 52 to a pressure chamber 54 of a pilot valve 55, which is designed in exactly the same way as the pilot valve 41. It has two valve seats 56, 57 in a housing 53, the channel 52 on the valve seat 56 flows. A channel 58, which leads to the atmosphere, opens at valve seat 57.
  • a valve body 60 again as an armature of an electromagnet, the coil of which is designated 61.
  • the coil 61 is also connected to electrical connections 59 on the underside of the pilot valve 55.
  • a channel 62 leads from the pressure chamber 54 to the pressure chamber 30.
  • a channel 63 formed in the intermediate flange 36 is also connected to the channel 50 via the channel 49. It is separated by a seal 64 arranged between the housing 10 and the intermediate flange 36 from a channel 65 which is located in the valve housing 10 and has a connection to an external control line X in the base plate (not shown).
  • the seal 64 is designed so that it separates the channels 63 and 65 as described above and seals the merging channels in the intermediate flange 36 and in the valve housing 10 to the outside.
  • the pressure chamber 30 is connected to the atmosphere via the channel 62, the pressure chamber 54 and the channel 58 in the pilot valve 55.
  • the pressure chamber 31 is also connected to the atmosphere via the channels 33, 34, 35, the pressure chamber 38 and the channel 46 in the pilot valve 41. As a result, the pressure chambers 31, 32 are relieved and the control slide 18 remains in its position.
  • the solenoid 61 of the pilot valve 55 is excited. This closes the channel 58 on the valve seat 57 and the pressure chamber 54 is connected to the channel 52. As a result, pressure medium reaches the pressure chamber 54 of the pilot valve 55 and through the bore P and the channels 50, 49 and 52 thence via the channel 62 into the pressure chamber 30. The piston 27 is thereby pressurized on one side and moves and thus the control slide to the right, since the pressure chamber 31 is still connected to the atmosphere at the same time. For the tax movement is only a short one Pressure pulse necessary, the control slide remains in its assumed position even after the solenoid of the pilot valve is no longer energized.
  • FIG. 1 A modification of the exemplary embodiment is shown in FIG.
  • the seal 64 between the valve housing 10 and the intermediate flange 36 is replaced here by a seal 66.
  • the connection between the channels 50 and 49 is separated, while at the same time the connection between the channels 63 and 65 is made and sealed to the outside.
  • the other connections between housing 10 and intermediate flange 36 are also sealed to the outside.
  • the pressure medium is supplied to the two pilot valves 41, 55 and thus to the pressure chambers 30, 31 via the external control connection X of the base plate, specifically via channels 65, 63, 49 and 48 and 52.
  • the pressure medium supply is via channel 50 and connection P of the base plate interrupted.
  • the piston movement is analogous to the previously described embodiment.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Multiple-Way Valves (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Wegeventil nach der Gattung des Hauptanspruchs.The invention is based on a directional valve according to the type of the main claim.

Aus der US-A-4 726 393 ist ein elektromagnetisch betätigbares Wegeventil bekannt, bei dem das eigentliche Wegeventil (Hauptventil) mit seinem Ventilgehäuse auf einer Anschlußplatte angebracht ist. Diese Anschlußplatte ist mit Kanälen zur Zu- und Abfuhr von Druckmittel versehen. Darüberhinaus sind in dieser Anschlußplatte zwei elektromagnetisch betätigbare Vorsteuerventile nebeneinander angeordnet, die über Kanäle in der Anschlußplatte mit dem Gehäuse des Wegeventils verbunden sind. Jeweils eines dieser Vorsteuerventile ist mit einem der Druckraume an jeweils einer der Seiten des Steuerschiebers des Wegeventils verbunden. Ein derartiges Wegeventil hat den Nachteil, daß neben dem Ventilgehäuse eine aufwendige Anschlußplatte mit Druckmittelkanälen benötigt wird. Die Druckmittelführung zwischen Vorsteuerventilen und Hauptventil durch diese Anschlußplatte ist aufwendig und der erforderliche Bauraum groß. Darüberhinaus bereitet bei derartigen Wegeventilen die Umstellung von Eigendruckmittelversorgung zu Fremdsteuerdruckmittelversorgung bzw. umgekehrt erhebliche Schwierigkeiten.From US-A-4 726 393 an electromagnetically actuated directional control valve is known, in which the actual directional control valve (main valve) is mounted with its valve housing on a connecting plate. This connection plate is provided with channels for the supply and discharge of pressure medium. In addition, two electromagnetically operable pilot valves are arranged side by side in this connection plate, which are connected to the housing of the directional control valve via channels in the connection plate. One of these pilot valves is connected to one of the pressure spaces on one of the sides of the control spool of the directional valve. Such a directional control valve has the disadvantage that, in addition to the valve housing, a complex connection plate with pressure medium channels is required. The pressure medium routing between pilot valves and main valve through this connection plate is complex and the space required is large. In addition, with such directional valves, the changeover from internal pressure medium supply to external control pressure medium supply or vice versa presents considerable difficulties.

Aus der DE-C-39 27 637 ist weiterhin bekannt, zwischen dem Wegeventil und einer Grundplatte für die Anschlußleitungen des Druckmittels eine Zwischenplatte vorzusehen, um die an beiden Seiten des Wegeventils befindlichen elektromagnetisch betätigbaren Vorsteuerventile von einer Seite aus mit elektrischen Anschlüssen verbinden zu können. Wenn solche Ventile in größerer Anzahl an einer einzigen gemeinsamen Mehrfachleitung angeschlossen werden, muß eine entsprechend große Zahl von Zwischenplatten für die elektrischen Anschlüsse vorgesehen werden.From DE-C-39 27 637 is also known between the directional valve and a base plate for the connecting lines of the Pressure medium to provide an intermediate plate in order to be able to connect the electromagnetically actuable pilot valves located on both sides of the directional control valve to electrical connections from one side. If such valves are connected in large numbers to a single common multiple line, a correspondingly large number of intermediate plates must be provided for the electrical connections.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Wegeventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Vorsteuerventile einseitig am Ventilgehäuse angebracht sind, wodurch nur ein elektrisches Anschlußteil notwendig ist. Dadurch ist die Zahl der elektrischen Kontaktierungen geringer.The directional control valve according to the invention with the characterizing features of the main claim has the advantage that the pilot valves are mounted on one side on the valve housing, whereby only an electrical connection part is necessary. This reduces the number of electrical contacts.

Ferner baut ein solches Wegeventil kürzer als ein Ventil mit beidseitig angeordneten Vorsteuereinheiten, und die Bauhöhe ist aufgrund des Wegfalls der Zwischenplatte ebenfalls geringer.Furthermore, such a directional control valve is shorter than a valve with pilot control units arranged on both sides, and the overall height is also lower due to the omission of the intermediate plate.

Das Wegeventil kann weiterhin durch einfaches Auswechseln einer Dichtung von Eigensteuerung auf Fremdsteuerung umgestellt werden.The directional control valve can also be switched from self-control to external control by simply changing a seal.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der nachstehenden Beschreibung und Zeichnung wiedergegeben. Letztere zeigt in Figur 1 eine perspektivische Darstellung eines Wegeventils mit zwei Vorsteuerventilen, in Figur 2 einen Schnitt durch dieses Ventil und in Figur 3 einen Schnitt in Richtung III-III nach Figur 2. Figur 4 zeigt einen Schnitt in Richtung IV-IV nach Figur 2. Figur 5 zeigt einen dem Schnitt III-III entsprechenden Schnitt V-V durch eine Abwandlung des Wegeventils.An embodiment of the invention is shown in the description and drawing below. The latter shows in Figure 1 a perspective view of a directional control valve with two pilot valves, in Figure 2 a section through this valve and in Figure 3 a section in the direction III-III of Figure 2. Figure 4 shows a section in the direction IV-IV of Figure 2 5 shows a section VV corresponding to section III-III through a modification of the directional valve.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das elektromagnetisch betätigbare Wegeventil hat ein Gehäuse 10, in dem eine durchgehende Längsbohrung 11 ausgebildet ist. In dieser Längsbohrung sind mehrere Trennscheiben 12 bis 17 eingesetzt, zwischen denen der Steuerschieber 18 geführt ist. Dieser weist zwei längliche Ringnuten 19, 20 auf. Zwischen zwei benachbarten Steuerscheiben 12 bis 17 mündet jeweils eine Bohrung 22 bis 26, welche mit Verbrauchern A, B, S, Atmosphäre R und Druckmittelquelle P über eine nicht dargestellte Grundplatte verbunden sind. Der Steuerschieber wird betätigt mit Hilfe zweier Kolben 27, 28, die beiderseits seiner Stirnseiten in der Längsbohrung 11 geführt und durch Dichtungen 29A, 29B abgedichtet sind und dort über Druckräume 30, 31 beaufschlagt werden.The electromagnetically actuated directional valve has a housing 10 in which a continuous longitudinal bore 11 is formed. Several cutting disks 12 to 17 are inserted in this longitudinal bore, between which the control slide 18 is guided. This has two elongated annular grooves 19, 20. Between two adjacent control disks 12 to 17, a bore 22 to 26 opens, which are connected to consumers A, B, S, atmosphere R and pressure medium source P via a base plate, not shown. The control slide is actuated with the aid of two pistons 27, 28 which are guided on both sides of its end faces in the longitudinal bore 11 and are sealed by seals 29A, 29B and are acted upon there via pressure chambers 30, 31.

Die Längsbohrung 11 ist an einer Seite durch einen Deckel 32 verschlossen, in dem ein Kanal 33 ausgebildet ist, der mit einer Längsbohrung 34 im Gehäuse 10 verbunden ist, die wiederum mit einem Kanal 35 in einem Zwischenflansch 36 in Verbindung steht.The longitudinal bore 11 is closed on one side by a cover 32, in which a channel 33 is formed, which is connected to a longitudinal bore 34 in the housing 10, which in turn is connected to a channel 35 in an intermediate flange 36.

Der Kanal 35 steht in Verbindung mit einem Druckraum 38, welcher in einem am Zwischenflansch 36 befestigten Gehäuse 39 eines Vorsteuerventils 41 ausgebildet ist. Am oberen und unteren Ende des Druckraumes 38 ist jeweils ein Ventilsitz 42, 43 ausgebildet, dazwischen befindet sich ein länglicher zylindrischer Ventilkörper 44. Dieser bildet den Anker eines Elektromagneten, dessen Spule mit 45 bezeichnet ist, die wiederum mit elektrischen Anschlüssen 40 an der Unterseite des Vorsteuerventils 41 verbunden ist. Am unteren Ventilsitz 43 mündet ein Kanal 46, der zur Atmosphäre Verbindung hat. Am Ventilsitz 42 mündet ein Kanal 48, der zu einem Kanal 49 im Zwischenflansch 36 führt, welcher wiederum mit einem Kanal 50 verbunden ist, der in die Längsbohrung 11 eindringt, und zwar zwischen den Trennscheiben 14 und 15. Wenn der Elektromagnet nicht erregt ist, wird der Ventilkörper 44 durch die Kraft einer Feder 47 an den oberen Ventilsitz 42 gedrückt.The channel 35 is connected to a pressure chamber 38, which is formed in a housing 39 of a pilot valve 41 fastened to the intermediate flange 36. At the upper and lower end of the pressure chamber 38, a valve seat 42, 43 is formed, between which there is an elongated cylindrical valve body 44. This forms the armature of an electromagnet, the coil of which is designated 45, which in turn has electrical connections 40 on the underside of the Pilot valve 41 is connected. A channel 46, which has a connection to the atmosphere, opens at the lower valve seat 43. At the valve seat 42, a channel 48 opens, which leads to a channel 49 in the intermediate flange 36, which in turn is connected to a channel 50, which penetrates into the longitudinal bore 11, namely between the cutting disks 14 and 15. If the electromagnet is not energized, the valve body 44 is pressed against the upper valve seat 42 by the force of a spring 47.

Der Kanal 50 hat über den Kanal 49 und einen Kanal 52 Verbindung mit einem Druckraum 54 eines Vorsteuerventils 55, das genauso ausgebildet ist wie das Vorsteuerventil 41. Es hat in einem Gehäuse 53 je zwei Ventilsitze 56, 57, wobei am Ventilsitz 56 der Kanal 52 mündet. Am Ventilsitz 57 mündet ein Kanal 58, der zur Atmosphäre führt. Im Druckraum 54 befindet sich ein Ventilkörper 60, wiederum als Anker eines Elektromagneten, dessen Spule mit 61 bezeichnet ist. Die Spule 61 ist ebenfalls mit elektrischen Anschlüssen 59 an der Unterseite des Vorsteuerventils 55 verbunden. Bei nicht erregter Magnetspule wird der Ventilkörper 60 durch eine Feder 67 gegen den Ventilsitz 56 gedrückt. Das Vorsteuerventil 55 sitzt neben dem Vorsteuerventil 41 und ebenfalls am Zwischenflansch 36.The channel 50 is connected via the channel 49 and a channel 52 to a pressure chamber 54 of a pilot valve 55, which is designed in exactly the same way as the pilot valve 41. It has two valve seats 56, 57 in a housing 53, the channel 52 on the valve seat 56 flows. A channel 58, which leads to the atmosphere, opens at valve seat 57. In the pressure chamber 54 there is a valve body 60, again as an armature of an electromagnet, the coil of which is designated 61. The coil 61 is also connected to electrical connections 59 on the underside of the pilot valve 55. When the solenoid is not energized, the valve body 60 is pressed against the valve seat 56 by a spring 67. The pilot valve 55 is located next to the pilot valve 41 and also on the intermediate flange 36.

Vom Druckraum 54 führt ein Kanal 62 zum Druckraum 30. An den Kanal 50 ist über den Kanal 49 noch ein im Zwischenflansch 36 ausgebildeter Kanal 63 angeschlossen. Er ist durch eine zwischen dem Gehäuse 10 und dem Zwischenflansch 36 angeordnete Dichtung 64 getrennt von einem Kanal 65, der sich im Ventilgehäuse 10 befindet und Anschluß zu einer Fremdsteuerleitung X in der nicht dargestellten Grundplatte hat.A channel 62 leads from the pressure chamber 54 to the pressure chamber 30. A channel 63 formed in the intermediate flange 36 is also connected to the channel 50 via the channel 49. It is separated by a seal 64 arranged between the housing 10 and the intermediate flange 36 from a channel 65 which is located in the valve housing 10 and has a connection to an external control line X in the base plate (not shown).

Die Dichtung 64 ist so ausgebildet, daß sie wie zuvor beschrieben, die Kanäle 63 und 65 trennt und die ineinander übergehenden Kanäle im Zwischenflansch 36 und im Ventilgehäuse 10 nach außen abdichtet.The seal 64 is designed so that it separates the channels 63 and 65 as described above and seals the merging channels in the intermediate flange 36 and in the valve housing 10 to the outside.

Bei nicht erregten Magnetspulen der Vorsteuerventile 41, 55 liegen die Ventilkörper 44, 60 aufgrund der Wirkung der Feder 47, 67 an den Ventilsitzen 42 und 56 an, so daß die Druckräume 38 und 54 gegen Druckmittel aus dem Anschluß P der nicht dargestellten Grundplatte abgedichtet sind. Der Druckraum 30 steht über den Kanal 62, den Druckraum 54 und den Kanal 58 im Vorsteuerventil 55 mit der Atmosphäre in Verbindung. Der Druckraum 31 steht ebenfalls über die Kanäle 33, 34, 35, den Druckraum 38 und den Kanal 46 im Vorsteuerventil 41 mit der Atmosphäre in Verbindung. Dadurch sind die Druckräume 31, 32 entlastet und der Steuerschieber 18 verbleibt in seiner Position.When the solenoids of the pilot valves 41, 55 are not energized, the valve bodies 44, 60 rest against the valve seats 42 and 56 due to the action of the spring 47, 67, so that the pressure spaces 38 and 54 are sealed against pressure medium from the connection P of the base plate, not shown . The pressure chamber 30 is connected to the atmosphere via the channel 62, the pressure chamber 54 and the channel 58 in the pilot valve 55. The pressure chamber 31 is also connected to the atmosphere via the channels 33, 34, 35, the pressure chamber 38 and the channel 46 in the pilot valve 41. As a result, the pressure chambers 31, 32 are relieved and the control slide 18 remains in its position.

Soll der Steuerschieber nach rechts bewegt werden, wird die Magnetspule 61 des Vorsteuerventils 55 erregt. Dadurch wird am Ventilsitz 57 der Kanal 58 verschlossen, und der Druckraum 54 hat Verbindung mit dem Kanal 52. Dadurch gelangt Druckmittel aus dem Anschluß P der Grundplatte über die Bohrung 24 und die Kanäle 50, 49 und 52 in den Druckraum 54 des Vorsteuerventils 55 und von dort über den Kanal 62 in den Druckraum 30. Der Kolben 27 wird dadurch einseitig mit Druck beaufschlagt und bewegt sich und damit den Steuerschieber nach rechts, da der Druckraum 31 gleichzeitig weiterhin mit der Atmosphäre verbunden ist. Für die Steuerbewegung ist nur ein kurzer Druckimpuls notwendig, der Steuerschieber verbleibt, auch nachdem die Magnetspule des Vorsteuerventils nicht mehr erregt ist, in seiner eingenommenen Position.If the control slide is to be moved to the right, the solenoid 61 of the pilot valve 55 is excited. This closes the channel 58 on the valve seat 57 and the pressure chamber 54 is connected to the channel 52. As a result, pressure medium reaches the pressure chamber 54 of the pilot valve 55 and through the bore P and the channels 50, 49 and 52 thence via the channel 62 into the pressure chamber 30. The piston 27 is thereby pressurized on one side and moves and thus the control slide to the right, since the pressure chamber 31 is still connected to the atmosphere at the same time. For the tax movement is only a short one Pressure pulse necessary, the control slide remains in its assumed position even after the solenoid of the pilot valve is no longer energized.

Bei einer Linksbewegung des Steuerschiebers 18 wird die Spule 45 des Vorsteuerventils 41 erregt, während das Vorsteuerventil 55 in Neutralstellung verbleibt. Druckmittel gelangt so vom Anschluß P der Grundplatte über die Bohrung 24 und die Kanäle 50, 49 und 48 in den Druckraum 47 des Vorsteuerventils 41 und von dort über die Kanäle 35, 34 und 33 in den Druckraum 31. Dadurch werden der Kolben 28 und damit der Steuerschieber 18 nach links bewegt.When the control slide 18 moves to the left, the spool 45 of the pilot valve 41 is excited, while the pilot valve 55 remains in the neutral position. Pressure medium thus passes from the port P of the base plate via the bore 24 and the channels 50, 49 and 48 into the pressure chamber 47 of the pilot valve 41 and from there via the channels 35, 34 and 33 into the pressure chamber 31. This causes the piston 28 and thus the control slide 18 moves to the left.

In Figur 5 ist eine Abwandlung des Ausführungsbeispiels gezeigt. Die Dichtung 64 zwischen Ventilgehäuse 10 und Zwischenflansch 36 ist hier durch eine Dichtung 66 ersetzt. Mit dieser Dichtung wird die Verbindung zwischen den Kanälen 50 und 49 getrennt, während gleichzeitig die Verbindung zwischen den Kanälen 63 und 65 hergestellt und nach außen abgedichtet wird. Die anderen Verbindungen zwischen Gehäuse 10 und Zwischenflansch 36 werden ebenfalls nach außen abgedichtet. Dadurch erfolgt die Druckmittelversorgung der beiden Vorsteuerventile 41, 55 und damit die der Druckräume 30, 31 über den Fremdsteueranschluß X der Grundplatte, und zwar über die Kanäle 65, 63, 49 und 48 bzw. 52. Gleichzeitig ist die Druckmittelversorgung über Kanal 50 und Anschluß P der Grundplatte unterbrochen. Die Kolbenbewegung erfolgt sinngemäß gleich zu dem zuvor beschriebenen Ausführungsbeispiel.A modification of the exemplary embodiment is shown in FIG. The seal 64 between the valve housing 10 and the intermediate flange 36 is replaced here by a seal 66. With this seal, the connection between the channels 50 and 49 is separated, while at the same time the connection between the channels 63 and 65 is made and sealed to the outside. The other connections between housing 10 and intermediate flange 36 are also sealed to the outside. As a result, the pressure medium is supplied to the two pilot valves 41, 55 and thus to the pressure chambers 30, 31 via the external control connection X of the base plate, specifically via channels 65, 63, 49 and 48 and 52. At the same time, the pressure medium supply is via channel 50 and connection P of the base plate interrupted. The piston movement is analogous to the previously described embodiment.

Claims (3)

  1. Electromagnetically actuable directional valve, consisting of at least one base plate for supplying a pressure medium and at least one valve housing (10) with a control spool (18) which can be adjusted with the aid of at least two electromagnetically actuable pilot valves (41, 55), of which one pilot valve (41), via passages (35, 34, 33), supplies pressure medium to a pressure space (31) for an actuation piston (28) on one side of the control spool (18) and the other pilot valve (55), via a passage (62), supplies pressure medium to a pressure space (30) for an actuation piston (27) on the other side of the control spool (18), characterised in that the pilot valves (41, 55) are attached adjacent to one another at one end of the valve housing (10), in that a passage (50) branching off from a pressure medium supply passage (24) and a passage (65) emerging from an external control pressure medium connection X are provided in the valve housing (10), in that an intermediate flange (36), which has passages (49, 63) aligned with the passages (50, 65) of the valve housing (10), is arranged between the pilot valves (41, 55) and the valve housing (10) and in that a seal (64, 66), which frees either the internal control pressure medium supply or the external control pressure medium supply and shuts off the other control pressure medium supply, is arranged between the valve housing (10) and the intermediate flange (36).
  2. Directional valve according to Claim 1, characterised in that the pilot valves (41, 55) each have, in a housing (39, 53), a magnet coil (45, 61) and a valve body (44, 60), configured as the armature of the electromagnet, and a spring (47, 67) acting on it.
  3. Directional valve according to one of Claims 1 or 2, characterised in that each pilot valve (41, 55) has two valve seats (42, 43 and 56, 57) opposite to one another and on the same axis as one another, and in that the valve seats (42, 56) arranged on one side are closed by spring action when no electricity is supplied to the coils (45, 61) and are opened when electricity flows through the coils (45, 61) and, at the same time, the valve seats (43, 57) arranged on the other side are closed.
EP91108757A 1990-06-23 1991-05-29 Electromagnetically actuated directional valve Expired - Lifetime EP0463394B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020024A DE4020024A1 (en) 1990-06-23 1990-06-23 ELECTROMAGNETICALLY ACTUABLE DIRECTION VALVE
DE4020024 1990-06-23

Publications (2)

Publication Number Publication Date
EP0463394A1 EP0463394A1 (en) 1992-01-02
EP0463394B1 true EP0463394B1 (en) 1993-11-03

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Application Number Title Priority Date Filing Date
EP91108757A Expired - Lifetime EP0463394B1 (en) 1990-06-23 1991-05-29 Electromagnetically actuated directional valve

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EP (1) EP0463394B1 (en)
DE (2) DE4020024A1 (en)
ES (1) ES2046824T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2019072328A1 (en) 2017-10-10 2019-04-18 Aventics Gmbh Valve arrangement and control method

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
DE4413657C1 (en) * 1994-04-20 1995-11-02 Festo Kg Valve arrangement
DE4416285A1 (en) 1994-05-07 1995-11-09 Bosch Gmbh Robert Electropneumatic valve device
DE19526459A1 (en) * 1995-07-20 1997-01-23 Festo Kg Valve arrangement
FR2807793B1 (en) * 2000-04-17 2002-05-31 Parker Hannifin Rak Sa INTERFACE MODULE FOR ELECTROPNEUMATIC VALVE ISLAND
DE10347590B3 (en) * 2003-10-14 2005-01-13 Festo Ag & Co. Distribution module for valve batteries has feed channel sector and two pre-control feed channel sectors able to be coupled to battery
DE102004042224B4 (en) * 2004-09-01 2006-07-20 Bosch Rexroth Ag Valve with function-integrated control piston seal
DE102008008314B4 (en) 2008-02-07 2010-06-02 Robert Bosch Gmbh Pilot operated pneumatic slide valve

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US3550621A (en) * 1968-08-20 1970-12-29 Parker Hannifin Corp Fluid distributing manifold for directional control valve
US4726393A (en) * 1986-07-31 1988-02-23 Mosier Industries, Inc. Power valve assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019072328A1 (en) 2017-10-10 2019-04-18 Aventics Gmbh Valve arrangement and control method

Also Published As

Publication number Publication date
DE4020024A1 (en) 1992-01-02
EP0463394A1 (en) 1992-01-02
ES2046824T3 (en) 1994-02-01
DE59100551D1 (en) 1993-12-09

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