EP0957267A2 - Mobile hydraulics valve arrangement - Google Patents

Mobile hydraulics valve arrangement Download PDF

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Publication number
EP0957267A2
EP0957267A2 EP99107707A EP99107707A EP0957267A2 EP 0957267 A2 EP0957267 A2 EP 0957267A2 EP 99107707 A EP99107707 A EP 99107707A EP 99107707 A EP99107707 A EP 99107707A EP 0957267 A2 EP0957267 A2 EP 0957267A2
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EP
European Patent Office
Prior art keywords
valve
valves
flow
hydraulic
user
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.)
Withdrawn
Application number
EP99107707A
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German (de)
French (fr)
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EP0957267A3 (en
Inventor
Andreas Merkel
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Daimler AG
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DaimlerChrysler AG
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Publication date
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Publication of EP0957267A2 publication Critical patent/EP0957267A2/en
Publication of EP0957267A3 publication Critical patent/EP0957267A3/en
Withdrawn legal-status Critical Current

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    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/30515—Load holding 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3127—Floating position connecting the working ports and the return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
    • F15B2211/40561—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged upstream of the flow control means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Definitions

  • the invention relates to a mobile hydraulic valve arrangement for controllable supply of several parallel consumer units with a hydraulic medium via at least one so-called Black / white valve, hereinafter referred to as SW valve, for every consumer unit.
  • SW valve Black / white valve
  • SW or on / off valve are switchable valves between several positions to understand the particular flow path in which they are positioned completely in an associated first position and release him in an associated second position close completely.
  • Mobile hydraulic valve arrangements for controlling several in parallel switched, e.g. combined into a valve block Consumer units in mobile hydraulics, such as a loading platform tipping device, a hydraulic motor to operate a PTO or a rear linkage etc. include for those Consumer units for which the flow of the hydraulic medium should be proportionally controllable, usually one each so-called proportional valve, which the flow rate a hydraulic medium by means of an adjustable movable Valve member, e.g. of a valve slide, correspondingly variable can control and also for the optional coupling and decoupling of the Consumer unit to or from the pending hydraulic flow serves.
  • the hydraulic flow is reduced to one at the proportional valve desired value, which is less than or equal to hydraulic source flow provided by a hydraulic medium flow source is.
  • SW valves and proportional valves are mostly made by electromagnets switched, the electromagnets generating a magnetic field, which causes an operating force on the valve spool.
  • proportional valves that are based on this principle, thus determines the current through the associated electromagnet the position e.g. of the valve spool and thereby the Flow rate of the hydraulic medium through the valve.
  • DE 42 10 252 C1 describes a mobile hydraulic valve arrangement known, in which several, arranged in a spool block SW valves connected in parallel to a common pressure line are.
  • the working pressure in the pressure line is determined by a pressure compensator that controls the flow of hydraulic fluid accordingly in the pressure line to the SW valves throttles a control pressure supplied to it.
  • This control pressure corresponds to one on the output side of the SW valves Load pressure.
  • the pressure compensator is independent of the one Hydraulic pump provided input pressure a working pressure in the pressure line to the SW valves by a constant Differential pressure is above the load pressure.
  • the invention is a technical problem of providing a mobile hydraulic valve arrangement for controllable supply several parallel consumer units, each with at least an SW valve for each consumer unit, the one continuously regulating the flow of the hydraulic medium to one enables respective consumer unit and is simple and is inexpensive.
  • the single figure shows a block diagram of a mobile hydraulic valve block, how it can be used in a commercial vehicle.
  • the valve 1 has a connection P for a pressure line 2, over the by means of a suitable, not shown in the drawing Pump, a hydraulic medium is introduced.
  • a pressure line 2 is connected to a proportional valve 3 which is electrically controllable and with which the flow through the Pressure line 2 can be adjusted continuously.
  • a proportional valve 3 which is electrically controllable and with which the flow through the Pressure line 2 can be adjusted continuously.
  • the pressure line 2 there are limit valves in the valve block 1 4 and 5 provided, in the event that in the Pressure line 2 critical pressures are exceeded, one Allow pressure equalization to a return line 6, for which on Valve block a connection designated T is provided.
  • each valve unit 7 to 10 has two paired working connections A1, B1 ... A4, B4 for one consumer unit each. Latter are not shown for the sake of simplicity.
  • the working connections are A1 and B1 decoupled from the return line 6 and in the valve block connected with each other.
  • a hydraulic flow can between the two connections can be prevented by both the 2/2-way valve 15 and the 2/2-way valve 16 into one Check valve position can be switched.
  • With left parallel flow position of the 4/3-way valve 11 can the associated Hydraulic medium is applied to the consumer unit via connection A1 and a return of the hydraulic medium possible via connection B1 if the 2/2-way valve 16 is in the right switch position is switched to flow.
  • the various valves are activated in a manner not shown Way using a joystick.
  • the associated control electronics controls the proportional valve 3 and the SW valve units 7 to 10, so that for the user in the operation of the valve control no difference to a conventional one Activation of several proportional valves is noticeable.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Servomotors (AREA)

Abstract

The valve arrangement (1) supplies several parallel consumer units with a hydraulics medium, and comprises respectively at least one black/white valve (11 to 22) for each consumer unit. A common proportional valve (3) is connected in series with the valves, with which the flow of hydraulic medium supplied to the respective valves is variably adjustable by the user.

Description

Die Erfindung betrifft eine Mobilhydraulik-Ventilanordnung zur steuerbaren Versorgung mehrerer paralleler Verbrauchereinheiten mit einem Hydraulikmedium über jeweils wenigstens ein sogenanntes Schwarz/Weiß-Ventil, nachfolgend SW-Ventil bezeichnet, für jede Verbrauchereinheit. Unter dem Begriff SW- oder auch Ein-/Aus-Ventil sind zwischen mehreren Stellungen umschaltbare Ventile zu verstehen, die einen jeweiligen Strömungsweg, in dem sie positioniert sind, in einer zugehörigen ersten Stellung vollständig freigeben und ihn in einer zugehörigen zweiten Stellung vollständig verschließen.The invention relates to a mobile hydraulic valve arrangement for controllable supply of several parallel consumer units with a hydraulic medium via at least one so-called Black / white valve, hereinafter referred to as SW valve, for every consumer unit. Under the term SW or on / off valve are switchable valves between several positions to understand the particular flow path in which they are positioned completely in an associated first position and release him in an associated second position close completely.

Mobilhydraulik-Ventilanordnungen zur Ansteuerung mehrerer parallel geschalteter, z.B. zu einem Ventilblock zusammengefaßter Verbrauchereinheiten in der Mobilhydraulik, wie etwa einer Ladeflächen-Kippvorrichtung, einem Hydraulikmotor zum Betrieb einer Zapfwelle oder einem Heck-Hubwerk etc., beinhalten für diejenigen Verbrauchereinheiten, für die der Fluß des Hydraulikmediums proportional steuerbar sein soll, üblicherweise jeweils ein eigenes sogenanntes Proportionalventil, welches die Durchflußmenge eines Hydraulikmediums mittels eines verstellbaren beweglichen Ventilgliedes, z.B. eines Ventilschiebers, entsprechend variabel zu steuern vermag und auch zur wahlweisen An- und Abkopplung der Verbrauchereinheit an bzw. von dem anstehenden Hydraulikfluß dient. Der Hydraulikfluß wird am Proportionalventil auf einen gewünschten Wert eingestellt, welcher kleiner oder gleich dem von einer Hydraulikmedium-Flußquelle bereitgestellten Hydraulikquellenfluß ist. Mobile hydraulic valve arrangements for controlling several in parallel switched, e.g. combined into a valve block Consumer units in mobile hydraulics, such as a loading platform tipping device, a hydraulic motor to operate a PTO or a rear linkage etc. include for those Consumer units for which the flow of the hydraulic medium should be proportionally controllable, usually one each so-called proportional valve, which the flow rate a hydraulic medium by means of an adjustable movable Valve member, e.g. of a valve slide, correspondingly variable can control and also for the optional coupling and decoupling of the Consumer unit to or from the pending hydraulic flow serves. The hydraulic flow is reduced to one at the proportional valve desired value, which is less than or equal to hydraulic source flow provided by a hydraulic medium flow source is.

SW-Ventile und Proportionalventile werden meist durch Elektromagnete geschaltet, wobei die Elektromagnete ein Magnetfeld erzeugen, das eine Betätigungskraft auf den Ventilschieber verursacht. Bei Proportionalventilen, die auf diesem Prinzip beruhen, bestimmt somit die Stromstärke durch den zugehörigen Elektromagneten die Stellung z.B. des Ventilschiebers und dadurch die Durchflußmenge des Hydraulikmediums durch das Ventil. Zur Ansteuerung der ggf. mehreren Proportionalventile für verschiedene Verbrauchereinheiten eines Ventilblocks sind daher herkömmlicherweise aufwendige elektronische Steuerschaltungen für die Proportionalventile erforderlich.SW valves and proportional valves are mostly made by electromagnets switched, the electromagnets generating a magnetic field, which causes an operating force on the valve spool. With proportional valves that are based on this principle, thus determines the current through the associated electromagnet the position e.g. of the valve spool and thereby the Flow rate of the hydraulic medium through the valve. For control of possibly several proportional valves for different Consumer units of a valve block are therefore conventional elaborate electronic control circuits for the Proportional valves required.

Aus der DE 42 10 252 C1 ist eine Mobilhydraulik-Ventilanordnung bekannt, bei der mehrere, in einem Steuerschieberblock angeordnete SW-Ventile parallel an eine gemeinsame Druckleitung angeschlossen sind. Der Arbeitsdruck in der Druckleitung wird mittels einer Druckwaage eingestellt, die den Fluß von Hydraulikmedium in der Druckleitung hin zu den SW-Ventilen entsprechend eines ihr zugeführten Steuerdruckes drosselt. Dieser Steuerdruck entspricht einem ausgangsseitig der SW-Ventile vorliegenden Lastdruck. Die Druckwaage stellt unabhängig von dem über eine Hydraulikpumpe bereitgestellten Eingangsdruck einen Arbeitsdruck in der Druckleitung zu den SW-Ventilen ein, der um einen gleichbleibenden Differenzdruck über dem Lastdruck liegt.DE 42 10 252 C1 describes a mobile hydraulic valve arrangement known, in which several, arranged in a spool block SW valves connected in parallel to a common pressure line are. The working pressure in the pressure line is determined by a pressure compensator that controls the flow of hydraulic fluid accordingly in the pressure line to the SW valves throttles a control pressure supplied to it. This control pressure corresponds to one on the output side of the SW valves Load pressure. The pressure compensator is independent of the one Hydraulic pump provided input pressure a working pressure in the pressure line to the SW valves by a constant Differential pressure is above the load pressure.

Der Erfindung liegt als technisches Problem die Bereitstellung einer Mobilhydraulik-Ventilanordnung zur steuerbaren Versorgung mehrerer paralleler Verbrauchereinheiten mit jeweils wenigstens einem SW-Ventil für jede Verbrauchereinheit zugrunde, die ein kontinuierliches Regeln des Flusses des Hydraulikmediums zu einer jeweiligen Verbrauchereinheit ermöglicht und dabei einfach und kostengünstig aufgebaut ist.The invention is a technical problem of providing a mobile hydraulic valve arrangement for controllable supply several parallel consumer units, each with at least an SW valve for each consumer unit, the one continuously regulating the flow of the hydraulic medium to one enables respective consumer unit and is simple and is inexpensive.

Dieses Problem wird erfindungsgemäß dadurch gelöst, daß in der Mobilhydraulik-Ventilanordnung den verschiedenen Verbrauchereinheiten jeweils wenigstens ein SW-Ventil zugeordnet ist und den SW-Ventilen ein gemeinsames benutzergesteuertes Proportionalventil vorgeschaltet ist, mit dem der Fluß des den SW-Ventilen zugeleiteten Hydraulikmediums variabel einstellbar ist. Auf diese Weise wird erreicht, daß gegebenenfalls mit einem einzigen Proportionalventil mehrere Verbrauchereinheiten, die über die SW-Ventile individuell auswählbar sind, mit einem proportionalen Hydraulikmediumfluß angesteuert werden können, der vom Benutzer nach seinen Wünschen eingestellt werden kann.This problem is solved according to the invention in that in the Mobile hydraulic valve arrangement for the various consumer units at least one SW valve is assigned and the SW valves a common user-controlled proportional valve is connected upstream, with which the flow of the supplied to the SW valves Hydraulic medium is variably adjustable. To this Way is achieved that, if necessary, with a single proportional valve several consumer units via the SW valves are individually selectable, with a proportional Hydraulic medium flow can be controlled by the user can be adjusted according to his wishes.

In Weiterbildung der Erfindung ist zur gleichzeitigen Ansteuerung von SW-Ventilen und Proportionalventil eine Ansteuerelektronik mit Joystick-Bedienelement vorgesehen. Durch Betätigung nur dieses einen Bedienelementes ist es dem Benutzer auf diese Weise möglich, den Fluß in allen SW-Ventilen auf einen gewünschten Wert einzustellen.In a development of the invention is for simultaneous control control electronics of SW valves and proportional valve provided with joystick control. By actuation only this one control element is the user on this Way possible, the flow in all SW valves to a desired Value.

Eine bevorzugte Ausführungsform der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.A preferred embodiment of the invention is in the drawing shown and will be described below.

Die einzige Figur zeigt ein Blockschaltbild eines Mobilhydraulik-Ventilblocks, wie er in einem Nutzfahrzeug einsetzbar ist.The single figure shows a block diagram of a mobile hydraulic valve block, how it can be used in a commercial vehicle.

Der Ventil 1 weist einen Anschluß P für eine Druckleitung 2 auf, über den mittels einer geeigneten, in der Zeichnung nicht dargestellten Pumpe, ein Hydraulikmedium eingeleitet wird. In diese Druckleitung 2 ist ein Proportionalventil 3 geschaltet, das elektrisch steuerbar ist und mit dem der Durchfluß durch die Druckleitung 2 stufenlos eingestellt werden kann. Zur Druckbegrenzung in der Druckleitung 2 sind im Ventilblock 1 Begrenzungsventile 4 und 5 vorgesehen, die, für den Fall, daß in der Druckleitung 2 kritische Drücke überschritten werden, einen Druckausgleich zu einer Rückleitung 6 ermöglichen, für die am Ventilblock ein mit T bezeichneter Anschluß vorgesehen ist. In die Druckleitung 2 und in die Rückleitung 6 sind hinter das Proportionalventil 3 parallel vier SW-Ventileinheiten 7 bis 10 geschaltet, die jeweils ein elektrisch steuerbares 4/3-Wegeventil 11 bis 14 und jeweils zwei dazu in Serie geschaltete, elektrisch steuerbare 2/2-Wegeventile 15 bis 22 umfassen. Jede Ventileinheit 7 bis 10 weist zwei paarweise Arbeitsanschlüsse A1, B1 ... A4, B4 für jeweils eine Verbrauchereinheit auf. Letztere sind der Einfachheit halber nicht gezeigt.The valve 1 has a connection P for a pressure line 2, over the by means of a suitable, not shown in the drawing Pump, a hydraulic medium is introduced. In these Pressure line 2 is connected to a proportional valve 3 which is electrically controllable and with which the flow through the Pressure line 2 can be adjusted continuously. For pressure limitation In the pressure line 2 there are limit valves in the valve block 1 4 and 5 provided, in the event that in the Pressure line 2 critical pressures are exceeded, one Allow pressure equalization to a return line 6, for which on Valve block a connection designated T is provided. In the pressure line 2 and in the return line 6 are behind the proportional valve 3 four SW valve units 7 to 10 connected in parallel, each an electrically controllable 4/3-way valve 11 to 14 and two electric series connected to each controllable 2/2-way valves 15 to 22 include. Each valve unit 7 to 10 has two paired working connections A1, B1 ... A4, B4 for one consumer unit each. Latter are not shown for the sake of simplicity.

Im folgenden wird die gleichartige Funktion der SW-Ventileinheiten 7 bis 10 am Beispiel der SW-Ventileinheit 7 erläutert.The following is the similar function of the SW valve units 7 to 10 using the example of the SW valve unit 7 explained.

Bei Mittelstellung des 4/3-Wegeventils 11 sind die Arbeitsanschlüsse A1 und B1 von der Rückleitung 6 entkoppelt und im Ventilblock miteinander verbunden. Dabei kann ein Hydraulikfluß zwischen den beiden Anschlüssen unterbunden werden, indem sowohl das 2/2-Wegeventil 15 als auch das 2/2-Wegeventil 16 in eine Rückschlagventil-Stellung geschaltet werden. Bei linker Paralleldurchflußstellung des 4/3-Wegeventils 11 kann die zugehörige Verbrauchereinheit über den Anschluß A1 mit Hydraulikmedium beaufschlagt werden, und ein Rücklauf des Hydraulikmediums ist über den Anschluß B1 möglich, wenn das 2/2-Wegeventil 16 in die rechte Schaltstellung auf Durchfluß geschaltet wird. Umgekehrt kann entsprechend bei rechter Kreuzdurchflußstellung des 4/3-Wegeventils 11 und geeigneter Stellung der 2/2-Wegeventile 15, 16 über den Anschluß B1 die zugehörige Verbrauchereinheit mit Hydraulikmedium beaufschlagt werden und dabei ein Rücklauf über den Anschluß A1 stattfinden. Bei Bedarf kann zudem eine Schwimmstellung realisiert werden, in der die Anschlüsse A1, B1 und T verbunden sind. Dazu werden die beiden 2/2-Wegeventile 15, 16 bestromt. Des weiteren ist anzumerken, daß die Ventileinheiten 7 bis 10 durch die Rückschlagventile nahezu leckölfrei sind.When the 4/3-way valve 11 is in the middle position, the working connections are A1 and B1 decoupled from the return line 6 and in the valve block connected with each other. A hydraulic flow can between the two connections can be prevented by both the 2/2-way valve 15 and the 2/2-way valve 16 into one Check valve position can be switched. With left parallel flow position of the 4/3-way valve 11 can the associated Hydraulic medium is applied to the consumer unit via connection A1 and a return of the hydraulic medium possible via connection B1 if the 2/2-way valve 16 is in the right switch position is switched to flow. Vice versa can accordingly with the right cross flow position of the 4/3-way valve 11 and suitable position of the 2/2-way valves 15, 16 via connection B1 with the associated consumer unit Hydraulic medium are applied and a return flow the A1 connection take place. If necessary, a swimming position can also be used can be realized in which the connections A1, B1 and T are connected. For this purpose, the two 2/2-way valves 15, 16 energized. It should also be noted that the valve units 7 up to 10 are almost leak-free due to the check valves.

Durch das Vorschalten des einzigen Proportionalventils 3 vor die SW-Ventileinheiten 7 bis 10 ist es beim Ventilblock 1 auf einfache Weise nicht nur möglich, wahlweise die Arbeitsanschlüsse A1 bis B4 für Druckbeaufschlagung oder Rücklauf zu verwenden, sondern auch den Hydraulikfluß für die verschiedenen Verbrauchereinheiten stufenlos einzustellen.By connecting the single proportional valve 3 in front of the SW valve units 7 to 10 make it easy for valve block 1 Not only possible this way, optionally the work connections A1 to use B4 for pressurization or return, but also the hydraulic flow for the various consumer units continuously adjustable.

Die Ansteuerung der diversen Ventile erfolgt in nicht gezeigter Weise mittels eines Joystick. Die zugehörige Ansteuerelektronik steuert automatisch gleichzeitig das Proportionalventil 3 und die SW-Ventileinheiten 7 bi 10 an, so daß für den Anwender in der Bedienung der Ventilsteuerung kein Unterschied zu einer herkömmlichen Ansteuerung mehrerer Proportionalventile spürbar ist.The various valves are activated in a manner not shown Way using a joystick. The associated control electronics controls the proportional valve 3 and the SW valve units 7 to 10, so that for the user in the operation of the valve control no difference to a conventional one Activation of several proportional valves is noticeable.

Claims (2)

Mobilhydraulik-Ventilanordnung zur steuerbaren Versorgung mehrerer paralleler Verbrauchereinheiten mit einem Hydraulikmedium, mit jeweils wenigstens einem SW-Ventil (11 bis 22) für jede Verbrauchereinheit,
dadurch gekennzeichnet, daß den SW-Ventilen (11 bis 22) ein gemeinsames benutzergesteuertes Proportionalventil (3) vorgeschaltet ist, mit dem der Fluß des den jeweiligen SW-Ventilen (11 bis 22) zugeleiteten Hydraulikmediums benutzergesteuert variabel einstellbar ist. Mobile hydraulic valve arrangement for the controllable supply of several parallel consumer units with a hydraulic medium, with at least one SW valve (11 to 22) for each consumer unit,
characterized in that The SW valves (11 to 22) are preceded by a common user-controlled proportional valve (3) with which the flow of the hydraulic medium supplied to the respective SW valves (11 to 22) can be variably adjusted in a user-controlled manner. Mobilhydraulik-Ventilanordnung gemäß Anspruch 1,
dadurch gekennzeichnet, daß
eine Ansteuerelektronik mit einem benutzerbetätigbaren Joystick-Bedienelement vorgesehen ist, welche gleichzeitig die SW-Ventile (11 bis 22) und das Proportionalventil (3) in Abhängigkeit von der Betätigung des Joystick-Bedienelementes ansteuert.Mobile hydraulic valve assembly according to claim 1,
characterized in that
control electronics are provided with a user-operable joystick control element which simultaneously controls the software valves (11 to 22) and the proportional valve (3) depending on the actuation of the joystick control element.
EP99107707A 1998-05-15 1999-04-17 Mobile hydraulics valve arrangement Withdrawn EP0957267A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19821808 1998-05-15
DE1998121808 DE19821808A1 (en) 1998-05-15 1998-05-15 Mobile hydraulic valve arrangement

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EP0957267A3 EP0957267A3 (en) 2001-03-07

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210252C1 (en) 1992-03-28 1993-09-02 O & K Orenstein & Koppel Ag, 13581 Berlin, De

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9315778D0 (en) * 1993-07-30 1993-09-15 Pridham Peter W Proportional control hydraulic valves

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210252C1 (en) 1992-03-28 1993-09-02 O & K Orenstein & Koppel Ag, 13581 Berlin, De

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DE19821808A1 (en) 1999-11-25

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