DE2725917A1 - FIVE-CHAMBER DIRECTIONAL VALVE WITH DIRECT ELECTROMAGNETIC ACTUATION FOR SOFT SWITCHING - Google Patents

FIVE-CHAMBER DIRECTIONAL VALVE WITH DIRECT ELECTROMAGNETIC ACTUATION FOR SOFT SWITCHING

Info

Publication number
DE2725917A1
DE2725917A1 DE19772725917 DE2725917A DE2725917A1 DE 2725917 A1 DE2725917 A1 DE 2725917A1 DE 19772725917 DE19772725917 DE 19772725917 DE 2725917 A DE2725917 A DE 2725917A DE 2725917 A1 DE2725917 A1 DE 2725917A1
Authority
DE
Germany
Prior art keywords
control
oil
chamber
electromagnetic actuation
piston
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.)
Granted
Application number
DE19772725917
Other languages
German (de)
Other versions
DE2725917C2 (en
Inventor
Hans Bruegger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WANDFLUH AG PRAEZISIONSHYDRAUL
Original Assignee
WANDFLUH AG PRAEZISIONSHYDRAUL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WANDFLUH AG PRAEZISIONSHYDRAUL filed Critical WANDFLUH AG PRAEZISIONSHYDRAUL
Publication of DE2725917A1 publication Critical patent/DE2725917A1/en
Application granted granted Critical
Publication of DE2725917C2 publication Critical patent/DE2725917C2/en
Expired legal-status Critical Current

Links

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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F15B13/04—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
    • F15B13/0407—Means for damping the valve member movement

Landscapes

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

Abstract

In order to damp the hydraulic shocks which arise upon reversing the five-chamber directional control valve, the control plunger (7) has milled recesses (6, 19) with control edges (15, 20) on its end collars (23, 24). As a result, spring spaces (9, 18) are always filled with control oil from the return chambers (8, 21) in the end positions of the plunger, and, during a subsequent switching operation, the control plunger (7) must necessarily displace a volume of control oil via restrictions (16, 17). This brings about a reduction of its switching speed and a damping of the reversal shocks. The valve is of simple construction and can therefore be manufactured at a favourable cost. <IMAGE>

Description

Fünf-Kammer-Wegeventil mit direkter elektromagnetischer BetätigungFive-chamber directional control valve with direct electromagnetic actuation

für weiche Umsteuerung Die Erfindung betrifft ein Fiinf-Kammer-Wegeventil mit direkter elektromagnetischer Betätigung zur weichen Umsteuerung, wobei der Steuerkolben mittelst Magnet- oder Federkraft von einer Schaltstellung in die andere bewegt wird und gleichzeitig ein Oelvolumen von seiner Vorderseite über eine oder mehrere Fix- oder verstellbare Drosselstellen auf seine Rückseite verdrängt.for soft reversal The invention relates to a five-chamber directional control valve with direct electromagnetic actuation for soft reversal, whereby the control piston is moved from one switching position to the other by means of magnetic or spring force and at the same time a volume of oil from its front side via one or more fixed or displaced adjustable throttling points on its rear side.

Wegeventile sind unter dem Begriff Steuerschieber bekannt und dienen dazu, Hydraulik-Zylinder oder Hydromotoren zu steuern, bzw. Directional control valves are known under the term control slide and are used to control hydraulic cylinders or hydraulic motors, or

ein- oder auszuschalten oder die Arbeitsrichtung zu ändern.on or off or change the working direction.

Die bis heute verfügbaren, direktgesteuerten Schieberventile haben den Nachteil, dass die Steuervorgänge relativ rasch ablaufen und dadurch in den hydraulischen Systemen unliebsame Schaltschläge auftreten können. Belästigende Lärmentwicklung, Ueberbeanspruchung der mechanischen Teile (vor allem wenn grosse Massen hin und her bewegt werden müssen), vorzeitiger Verschleiss, unverantwortbare Druckspitzen im System und mindere Qualität der zu erzeugenden Produkte auf den betreffenden Produktionsmaschinen sind Begleiterscheinungen dieser ungünstigen, ungedämpften Umsteuerungen. The direct operated slide valves available to date have the disadvantage that the control processes run relatively quickly and thus in the unpleasant switching shocks can occur in hydraulic systems. Annoying noise development, Overstressing of the mechanical parts (especially when there are large masses must be moved here), premature wear and tear, irresponsible pressure peaks in the system and lower quality of the products to be produced on the relevant Production machines are side effects of this unfavorable, undamped Reversals.

Allen diesen Nachteilen begegnete man bisher mit z.B. hydraulisch vorgesteuerten Schiebeventilen (mit Schaltzeiteinstellung und angeschliffenen Steuerkanten) oder man baute Schocksicherungsplatten ein. Je nach Einsatzfall wurden sogar Proportional- oder Servoventile eingesetzt um die Anfahrcharakteristik in den Griff zu bekommen. Diese Lösungen waren aber relativ teuer. Wollte man billiger bauen, begnügte man sich mit dem blossen Anfasen der Steuerkanten. Diese Methode war aber zum grossen Teil zu wenig wirkungsvoll, da ja die Schaltgeschwindigkeit des Schieberkolbens nicht oder nur schlecht kontrolliert werden konnte. All these disadvantages have so far been countered with e.g. hydraulics pilot operated slide valves (with switching time setting and beveled control edges) or you built in shock protection plates. Depending on the application, even proportional or servo valves are used to get the start-up characteristics under control. However, these solutions were relatively expensive. You wanted to build cheaper, one contented oneself with the mere chamfering of the control edges. This method was however To a large extent, it is not very effective because of the switching speed of the spool could not or only poorly be controlled.

Der Erfindung liegt die Aufgabe zugrunde, den Steuerablauf mit einfachsten Mitteln zu kontrollieren und einstellbar zu verzögern. The invention is based on the task of simplifying the control sequence Means to control and adjustable to delay.

Erfindungsgemäss wird dies dadurch erreicht, dass der Steuerkolben an seinen Endbünden Anfräsungen mit Steuerkanten aufweist, damit in den Kolbenendstellungen die Federräume immer mit Oel nachgefüllt werden und der Steuerkolben bei einer nachfolgenden Schaltung zwangsweise ein Oelvolumen über eine Drosselstelle verdrängen muss. According to the invention, this is achieved in that the control piston has millings with control edges on its end collars, so in the piston end positions the spring chambers are always refilled with oil and the control piston with a subsequent one Circuit must necessarily displace an oil volume via a throttle point.

Im Folgenden wird anhand der beiliegenden Zeichnung ein Ausführungsbeispiel und dessen Funktion näher beschrieben. Die Figur zeigt einen Vier-Wege-Zweistellungssteuer-Schieber 1 in Arbeitsstellung, z.B. "vorwärts". Druckanschluss 2 ist mit Verbraucheranschluss 3 verbunden, ebenso ist Verbraucherrücklauf 4 mit Tankanschluss 5 verbunden. Ueber die Anfräsung 6 am Steuerkolben 7 fliesst Oel von der Rücklaufkammer 8 in den Federraum 9. Wenn auf den Steuerkolben 7 eine Kraft durch den Anker 10 eines druckdichten Elektrostellmagneten wirkt, so verschiebt sich der Steuerkolben nach rechts. Bevor der Verbraucher durch den Steuerkolben 7 und dessen Steuerkanten 11, 12, 13 und 14 von "vorwärts" auf "rückwärts" umgeschaltet wird, schliesst die Steuerkante 15 die Verbindung zwischen Rücklaufkammer 8 und Federraum 9 ab. Das sich im Federraum 9 befindliche Oel muss nun über die Drosselstellen 16 und 17 in den Federraum 18 verdrängt werden. Je nach Drosselquerschnitt wird nun der Steuerkolben 7 mehr oder weniger gebremst und dadurch wird eine weiche Umschaltung des Verbrauchers erzielt. An exemplary embodiment is described below with reference to the accompanying drawing and its function is described in more detail. The figure shows a four-way two-position control slide 1 in working position, e.g. "forward". Pressure connection 2 is with consumer connection 3, the consumer return 4 is also connected to the tank connection 5. Above the milling 6 on the control piston 7, oil flows from the return chamber 8 into the spring chamber 9. When the control piston 7 is a force through the armature 10 of a pressure-tight If the solenoid acts, the control piston moves to the right. Before the consumer through the control piston 7 and its control edges 11, 12, 13 and 14 is switched from "forwards" to "backwards", the control edge 15 closes the connection between the return chamber 8 and the spring chamber 9. That is in the pen room 9 now has to enter the spring chamber 18 via the throttle points 16 and 17 be displaced. Depending on the throttle cross-section, the control piston 7 is now more or less braked and thus a smooth switchover of the consumer is achieved.

Kurz bevor der Steuerkolben seine rechte Endstellung (Arbeitstellung "rückwärts") erreicht hat, wird über die Anfräsung 19 und die Steuerkante 20, Federraum 18 mit der Rücklaufkammer 21 verbunden und diese wird sicher mit Oel gefüllt.Shortly before the control piston reaches its right end position (working position "Backwards") is reached via the milling 19 and the control edge 20, spring space 18 connected to the return chamber 21 and this is safely filled with oil.

Fällt die Kraft am Anker 10 ab, so schaltet die Arbeitsfeder 22 den Steuerkolben 7 nach links wieder in Arbeitsstellung "vorwärts", dabei wird nun Oel vom Federraum 18 in Federraum 9 verdrängt. If the force on the armature 10 drops, the working spring 22 switches the Control piston 7 to the left again in the "forward" working position, this is now oil displaced from the spring chamber 18 into the spring chamber 9.

Selbstverständlich kann der Gegenstand der Erfindung auf alle üblichen direktgesteuerten Steuerschieber angewendet werden. Insbesondere auf Vier-Wege-Drei-Stellungs-Ventile mit zwei Arbeitsstellungen und Neutralstellung. Ebenso ist die Erfindung auf alle Kolbensinnbilder anwendbar. Auch ist die Erfindung nicht auf elektrisch betätigte Ventile beschränkt, sondern kann auch bei mechanisch, pneumatisch oder hydraulisch betätigten Ventilen Anwendung finden. Of course, the subject of the invention can apply to all customary directly operated control spool can be used. Especially on four-way three-position valves with two working positions and neutral position. Likewise, the invention applies to everyone Piston symbols applicable. Also, the invention does not apply to electrically operated ones Valves are limited, but can also be mechanical, pneumatic or hydraulic actuated valves are used.

Claims (2)

patentansprüche. patent claims. 7 Fünf-Kammer-Wegeventil mit direkter elektromagnetischer Betätigung für weiche Umsteuerung, wobei der Steuerkolben mittelst Magnet- oder Federkraft von einer Schaltstellung in die andere bewegt wird und gleichzeitig ein Oelvolumen von seiner Vorderseite über eine oder mehrere Fix- oder verstellbare Drosselstellen auf seine Rückseite verdrängt, dadurch gekennzeichnet, dass der Steuerkolben (7) an seinen beiden Endbünden (23, 24) Anfräsungen (6, 19) mit Steuerkanten (15, 20) aufweist, damit in den Kolbenendstellungen die Federräume (9, 18) immer mit Oel nachgefüllt werden und der Steuerkolben (7) bei einer nachfolgenden Schaltung zwangsweise ein Oelvolumen über eine Drosselstelle verdrängen muss. 7 Five-chamber directional control valve with direct electromagnetic actuation for soft reversal, with the control piston using magnetic or spring force is moved from one switching position to the other and at the same time an oil volume from its front side via one or more fixed or adjustable throttle points displaced onto its rear side, characterized in that the control piston (7) on its two end collars (23, 24) milled portions (6, 19) with control edges (15, 20) has so that the spring chambers (9, 18) always with oil in the piston end positions be refilled and the control piston (7) forcibly with a subsequent shift a volume of oil must displace via a throttle point. 2. Fünf-Kammer-Wegeventil nach Anspruch 1, dadurch gekennzeichnet, dass die Federräume (9, 18) mittelst Rückschlagventilen von den Rücklaufkammern (8, 21) aus nachgefüllt werden. 2. Five-chamber directional valve according to claim 1, characterized in that that the spring chambers (9, 18) by means of non-return valves from the return chambers (8, 21) can be refilled from.
DE2725917A 1977-03-22 1977-06-08 Five-chamber directional valve Expired DE2725917C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH347477A CH624751A5 (en) 1977-03-22 1977-03-22 Five-chamber directional control valve with damping of reversal shocks

Publications (2)

Publication Number Publication Date
DE2725917A1 true DE2725917A1 (en) 1978-09-28
DE2725917C2 DE2725917C2 (en) 1983-11-24

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ID=4256747

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2725917A Expired DE2725917C2 (en) 1977-03-22 1977-06-08 Five-chamber directional valve

Country Status (2)

Country Link
CH (1) CH624751A5 (en)
DE (1) DE2725917C2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949202A1 (en) * 1978-12-07 1980-06-26 Toyooki Kogyo Kk ELECTRICALLY ACTUATED FLUID CONTROL DEVICE
DE2905943A1 (en) * 1979-02-16 1980-08-21 Rexroth Gmbh G L Multiway control valve assembly - has time delay with damping piston between actuator and sliding plunger
EP0016436A2 (en) * 1979-03-26 1980-10-01 Regie Nationale Des Usines Renault Servo valve
US4406307A (en) * 1981-03-31 1983-09-27 Double A Products Company Directional valve with spool transfer loop
DE3246298A1 (en) * 1982-12-14 1984-06-14 Herion-Werke Kg, 7012 Fellbach Safety device
EP0149743A1 (en) * 1983-12-14 1985-07-31 Robert Bosch Gmbh Hydraulic control device
DE3434168A1 (en) * 1984-09-18 1986-03-27 Dieter 3330 Helmstedt Knopff Electromagnetically actuated slide valve
US4821773A (en) * 1987-03-13 1989-04-18 Herion-Werke Kg Directional control valve
EP0893608A1 (en) 1997-07-25 1999-01-27 HEILMEIER &amp; WEINLEIN Fabrik für Oel-Hydraulik GmbH &amp; Co. KG Spool control valve for high pressure hydraulics
US6021813A (en) * 1995-09-26 2000-02-08 Mannesmann Rexroth Ag Electromagnetically actuated directional valve
FR2784733A1 (en) * 1998-10-20 2000-04-21 Mannesmann Rexroth Sa Hydraulic fluid distributor, comprises an electric action with damped slider operation
EP3029325A1 (en) * 2014-12-02 2016-06-08 Mitsubishi Heavy Industries, Ltd. Spool valve, hydraulic machine, and wind turbine power generating apparatus
EP3643931A1 (en) * 2018-10-25 2020-04-29 Danfoss Power Solutions GmbH & Co. OHG Displacement control device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352689A1 (en) * 2003-11-12 2005-06-23 Bayerische Motoren Werke Ag Hydraulic pressure surge shut-off valve especially for servo steering system of motor vehicle has hydraulic source pressure acting on one end face of shut-off piston and hydraulic medium from working cylinder acting on other end face
CN105114663B (en) * 2015-08-20 2017-07-07 常德中联重科液压有限公司 The dynamic commutation method of reversal valve, reversal valve and structure of reversing valve
CN108194662B (en) * 2018-01-05 2019-09-24 宁波程锐液压科技有限公司 A kind of test valve of load-sensing valve
CN112878898B (en) * 2021-01-11 2022-11-22 南通大学 Intelligent pneumatic reciprocating impact device and use method thereof
DE102022206422A1 (en) 2022-06-27 2023-12-28 Robert Bosch Gesellschaft mit beschränkter Haftung Hydrostatic axial piston machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203136B (en) * 1960-02-20 1965-10-14 Hydraulik Gmbh Drive for a hydraulic press control
US3324890A (en) * 1965-06-09 1967-06-13 Continental Machines Solenoid valve having controlled retardation of spool motion
DE1550322A1 (en) * 1966-11-22 1969-01-16 Herion Erich Multi-way switch valve
DE2511991A1 (en) * 1975-03-19 1976-10-07 Bosch Gmbh Robert ELECTROMAGNETIC CONTROLLED DIRECTIONAL VALVE
DE1814154B2 (en) * 1968-12-12 1978-09-07 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Hydraulic pressure valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203136B (en) * 1960-02-20 1965-10-14 Hydraulik Gmbh Drive for a hydraulic press control
US3324890A (en) * 1965-06-09 1967-06-13 Continental Machines Solenoid valve having controlled retardation of spool motion
DE1550322A1 (en) * 1966-11-22 1969-01-16 Herion Erich Multi-way switch valve
DE1814154B2 (en) * 1968-12-12 1978-09-07 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Hydraulic pressure valve
DE2511991A1 (en) * 1975-03-19 1976-10-07 Bosch Gmbh Robert ELECTROMAGNETIC CONTROLLED DIRECTIONAL VALVE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Veröffentlichung "4/2-Magnetschieberventile NG 10 mit Federrückstellung, Internationale Anschlußmaße JIG" der Fa. Wandfluh, Juli 1974 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949202A1 (en) * 1978-12-07 1980-06-26 Toyooki Kogyo Kk ELECTRICALLY ACTUATED FLUID CONTROL DEVICE
DE2905943A1 (en) * 1979-02-16 1980-08-21 Rexroth Gmbh G L Multiway control valve assembly - has time delay with damping piston between actuator and sliding plunger
EP0016436A2 (en) * 1979-03-26 1980-10-01 Regie Nationale Des Usines Renault Servo valve
FR2452647A1 (en) * 1979-03-26 1980-10-24 Renault SERVO-VALVE
EP0016436A3 (en) * 1979-03-26 1981-03-25 Regie Nationale Des Usines Renault Servo valve
US4406307A (en) * 1981-03-31 1983-09-27 Double A Products Company Directional valve with spool transfer loop
DE3246298A1 (en) * 1982-12-14 1984-06-14 Herion-Werke Kg, 7012 Fellbach Safety device
EP0149743A1 (en) * 1983-12-14 1985-07-31 Robert Bosch Gmbh Hydraulic control device
DE3434168A1 (en) * 1984-09-18 1986-03-27 Dieter 3330 Helmstedt Knopff Electromagnetically actuated slide valve
US4821773A (en) * 1987-03-13 1989-04-18 Herion-Werke Kg Directional control valve
US6021813A (en) * 1995-09-26 2000-02-08 Mannesmann Rexroth Ag Electromagnetically actuated directional valve
EP0893608A1 (en) 1997-07-25 1999-01-27 HEILMEIER &amp; WEINLEIN Fabrik für Oel-Hydraulik GmbH &amp; Co. KG Spool control valve for high pressure hydraulics
FR2784733A1 (en) * 1998-10-20 2000-04-21 Mannesmann Rexroth Sa Hydraulic fluid distributor, comprises an electric action with damped slider operation
EP3029325A1 (en) * 2014-12-02 2016-06-08 Mitsubishi Heavy Industries, Ltd. Spool valve, hydraulic machine, and wind turbine power generating apparatus
EP3643931A1 (en) * 2018-10-25 2020-04-29 Danfoss Power Solutions GmbH & Co. OHG Displacement control device
CN111102260A (en) * 2018-10-25 2020-05-05 丹佛斯动力***有限责任两合公司 Displacement control device
US10941792B2 (en) 2018-10-25 2021-03-09 Danfoss Power Solutions Gmbh & Co. Ohg Displacement control device
CN111102260B (en) * 2018-10-25 2022-01-14 丹佛斯动力***有限责任两合公司 Displacement control device

Also Published As

Publication number Publication date
DE2725917C2 (en) 1983-11-24
CH624751A5 (en) 1981-08-14

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