EP1215397A2 - Multiway valve block - Google Patents

Multiway valve block Download PDF

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Publication number
EP1215397A2
EP1215397A2 EP01124579A EP01124579A EP1215397A2 EP 1215397 A2 EP1215397 A2 EP 1215397A2 EP 01124579 A EP01124579 A EP 01124579A EP 01124579 A EP01124579 A EP 01124579A EP 1215397 A2 EP1215397 A2 EP 1215397A2
Authority
EP
European Patent Office
Prior art keywords
directional valve
pressure
valve block
directional
block according
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
EP01124579A
Other languages
German (de)
French (fr)
Other versions
EP1215397A3 (en
EP1215397B1 (en
Inventor
Wolfgang Koetter
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1215397A2 publication Critical patent/EP1215397A2/en
Publication of EP1215397A3 publication Critical patent/EP1215397A3/en
Application granted granted Critical
Publication of EP1215397B1 publication Critical patent/EP1215397B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/168—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load with an isolator valve (duplicating valve), i.e. at least one load sense [LS] pressure is derived from a work port load sense pressure but is not a work port pressure itself
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31582—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having multiple pressure sources and a single output member
    • 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
    • F15B2211/60—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
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves

Definitions

  • the invention is based on a directional valve block with several Directional control valves for controlling at least one consumer by means of a pressure medium according to the preamble of the claim 1 specified from.
  • Such a directional valve block is used in practice e.g. in a working hydraulics of a vehicle used.
  • a so-called "load sensing” (LS) - Directional valve block for controlling connected consumers used as it is from the German publication Götz. W .: “Hydraulics in theory and practice", Bosch training, OMEGON technical literature 1997, page 266, is known.
  • LS directional valve block becomes a variable load pressure in the consumer connections sampled and processed in a control system.
  • the LS directional valve block has several directional valves on, which are connected in parallel to each other, so that several directional control valves can be operated simultaneously.
  • the directional control valves are selected using shuttle valves and each highest pressure of a pressure compensator in a connection plate fed. This arrangement corresponds to a 3-way current regulator.
  • each directional valve of the directional valve block can in a working position of the directional valve either with a control pressure connection Y, with a return R and / or be connected to a pump connection P.
  • predetermined with the directional valve block Consumers are supplied with pressure medium, so that e.g. a lifting device of the vehicle or the like, in a predetermined position is movable.
  • the well-known LS directional valve block can e.g. B. in agricultural use Vehicles such as combine harvesters are used.
  • Additional functions can also be performed with the directional valve block be carried out on the vehicle.
  • the directional valve block a speed limitation at faster Relief of a drive motor of the vehicle possible and / or a spring-loaded parking brake of the vehicle solvable.
  • control pressure connection in the known directional valve block which relieves the return in the neutral position is pressurized.
  • the build up of pressure is common with this directional valve block by an additional one Magnetic directional control valve implemented, which is used to build up pressure Control pressure connection with the pump connection P connects.
  • This additional valve can e.g. one from the German Publication Götz. W .: “Hydraulics in theory and practice", Bosch training, OMEGON technical literature 1997, page 268, known LS special valve without consumer connections, which in a predetermined position a memory for Execution of additional functions with pressure fluid.
  • DE 195 42 371 A1 also includes working hydraulics known an LS directional valve block, which one or more Directional control valves for consumers and one with the directional control valves connected connection plate to which a pump is connected is, as well as a pressure compensator in the connection plate has pump pressure applied to it and on the other hand from one that has been purchased from consumers Signal pressure and a regulator spring is applied.
  • the LS hydraulics act as a vehicle brake.
  • the directional valve block has an additional 3/2 solenoid directional valve in the connection plate.
  • the 3/2 solenoid directional valve provides a connection between the control pressure connection Y and the pump pressure connection P to build up pressure ago.
  • This well-known LS directional valve block is therefore an additional solenoid directional valve for pressure build-up required.
  • the directional valve block according to the invention with several directional valves to control at least one consumer by means of a pressure medium according to the features of the claim 1 has the advantage that one is already in the directional valve block existing directional valve for pressure build-up for additional functions is used, so that no additional valve for this the directional valve block according to the invention is required. In order to not only are less cables and installation space required, but lower the overall cost.
  • this can be achieved by having an existing, electrical operated directional valve has an intermediate position, in which the control pressure connection Y and the return R on the directional control valve is closed and the control pressure connection Y and the pump pressure port P are connected in terms of flow are so that a pressure build-up e.g. in a store the working hydraulics of the vehicle to perform additional functions is possible.
  • the directional control valve can on the one hand the conventional Functions, i.e. supplying the connected Enable consumers, and on the other hand in the intended Intermediate position enable pressure to build up in the accumulator, by predetermined additional functions with the working hydraulics to be able to execute the vehicle.
  • the directional valve block according to the invention can preferably a spring-loaded parking brake of the vehicle and / or a speed limitation with quick relief of the drive motor of the vehicle or the like as additional functions be carried out without constructive changes made on the directional valve block according to the invention Need to become.
  • the directional valve equipped with an intermediate position is in the directional valve block or in the working hydraulics of the Integrated vehicle.
  • a directional valve block or in the working hydraulics of the Integrated vehicle can Directional control valves with such an intermediate position, at which the consumer is not connected to the directional valve are equipped.
  • Directional valve block uses a so-called LS directional valve block in which the connection plate at least in the usual way a pressure compensator and at least one pressure relief valve having. Of course you can in the usual way too other components may be provided on the connection plate.
  • FIG 1 is a simplified circuit diagram of an inventive Directional valve block 1 shown as for Use cases in mobile hydraulics where multiple functions one after the other or simultaneously via directional valves taxes are used.
  • the Directional valve block 1 a connection plate 2 and an end plate 3, via which the inflow and return flow takes place.
  • the connection plate 2 contains a pressure relief valve 4 and one Pressure compensator 5, which is connected to the connection plate 2 Pump 6 is connected.
  • the present directional valve block 1 represents a so-called LS (Load Sensing) directional valve block, where "load sensing" means that the variable load pressure in the consumer connections is scanned and further processed in a regulation becomes.
  • LS Load Sensing
  • the directional valve block 1 has two directional valves 7 in the present case and 8, which are parallel to each other.
  • the load pressures of different consumers are over Shuttle valves 11 selected, the highest Pressure of the pressure compensator 5 is supplied.
  • This configuration in the manner of a three-way current regulator, provides essential Advantages for practical operation.
  • the directional control valves 7, 8 each have consumer connections A and B, a return R, a pump connection P and one Control pressure connection Y.
  • the directional control valve 7 has three positions on, with a neutral position with 0 and the two Working positions are labeled I and II.
  • the directional control valve 8 has a position in addition to the positions 0, I, II additional intermediate position III. At this intermediate position III, the consumer connections A, B are closed and the control pressure port Y with the pump pressure port P connected. In the intermediate position III a connected to the directional valve block 1 via the end plate 3 Memory 9 filled with pressure medium via the directional valve 8 become. As a result, a pressure is built up in the memory 9, to additional functions with the directional valve block 1 according to the invention to be able to perform on the vehicle. The Pressure build-up in the memory 9 is dependent on a corresponding signal from a pressure switch 10, the is coupled to the directional valve block 1.
  • Figure 2 shows a section of the directional valve block according to the invention 1, in which the directional valve 8 with the intermediate position III is shown.
  • FIG. 3 shows a diagram in which a predetermined control sequence 0-I-II of the directional control valve 8 is shown. With this control, it is first switched from neutral position 0 to intermediate position III and then to working position I.
  • the diagram shows the pump pressure (P d ) volume flow (Q) curve via a solenoid current (I) for controlling the proportional directional valve 8.
  • a response current I1 for building up pressure in the memory 9 has a sufficient distance from the start of a work function I2.
  • a maximum pump pressure or pressure relief valve (DBV) pressure P DBV is reached, which in working position I drops to a required load pressure P load as soon as an oil flow flows to a consumer.
  • the volume flow Q increases continuously in the working position I of the directional control valve 8 until the consumer is supplied with oil, and then has a constant course.

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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)

Abstract

Path valve block has several path valves (7, 8) for controlling one or more loads using a pressure medium. One of the path valves (8) is also configured as a pressure-increasing device for execution of additional functions. The block is also configured as a load-sensing block.

Description

Stand der TechnikState of the art

Die Erfindung geht von einem Wegeventilblock mit mehreren Wegeventilen zum Ansteuern wenigstens eines Verbrauchers mittels eines Druckmittels nach der im Oberbegriff des Anspruchs 1 näher bezeichneten Art aus.The invention is based on a directional valve block with several Directional control valves for controlling at least one consumer by means of a pressure medium according to the preamble of the claim 1 specified from.

Ein derartiger Wegeventilblock wird in der Praxis z.B. in einer Arbeitshydraulik eines Fahrzeuges eingesetzt. Dabei wird beispielsweise ein sogenannter "Load Sensing" (LS) - Wegeventilblock zum Ansteuern von angeschlossenen Verbrauchern verwendet, wie er aus der deutschen Publikation Götz. W.: "Hydraulik in Theorie und Praxis", Bosch Schulung, OMEGON Fachliteratur 1997, Seite 266, bekannt ist. Bei dem LS-Wegeventilblock wird ein variabler Lastdruck in den Verbraucheranschlüssen abgetastet und in einer Regelung weiterverarbeitet. Der LS-Wegeventilblock weist mehrere Wegeventile auf, die parallel zueinander geschaltet sind, so daß mehrere Wegeventile gleichzeitig betätigbar sind. Um die Lastdrücke verschiedener Verbraucher zu trennen, werden die Wegeventile über Wechselventile ausgewählt und der jeweils höchste Druck einer Druckwaage in einer Anschlußplatte zugeführt. Diese Anordnung entspricht einem 3-Wege-Stromregler.Such a directional valve block is used in practice e.g. in a working hydraulics of a vehicle used. there For example, a so-called "load sensing" (LS) - Directional valve block for controlling connected consumers used as it is from the German publication Götz. W .: "Hydraulics in theory and practice", Bosch training, OMEGON technical literature 1997, page 266, is known. In which LS directional valve block becomes a variable load pressure in the consumer connections sampled and processed in a control system. The LS directional valve block has several directional valves on, which are connected in parallel to each other, so that several directional control valves can be operated simultaneously. Around to separate the load pressures of different consumers the directional control valves are selected using shuttle valves and each highest pressure of a pressure compensator in a connection plate fed. This arrangement corresponds to a 3-way current regulator.

Die Verbraucheranschlüsse jedes Wegeventils des Wegeventilblocks können in einer Arbeitsstellung des Wegeventils entweder mit einem Steuerdruckanschluß Y, mit einem Rücklauf R und/oder mit einem Pumpenanschluß P verbunden werden.The consumer connections of each directional valve of the directional valve block can in a working position of the directional valve either with a control pressure connection Y, with a return R and / or be connected to a pump connection P.

Auf diese Weise können mit dem Wegeventilblock vorbestimmte Verbraucher mit Druckmittel versorgt werden, so daß z.B. eine Hubeinrichtung des Fahrzeuges oder dergleichen, in eine vorbestimmte Stellung bewegbar ist. Der bekannte LS-Wegeventilblock kann z. B. bei landwirtschaftlich genutzten Fahrzeugen wie Mähdreschern eingesetzt werden.In this way, predetermined with the directional valve block Consumers are supplied with pressure medium, so that e.g. a lifting device of the vehicle or the like, in a predetermined position is movable. The well-known LS directional valve block can e.g. B. in agricultural use Vehicles such as combine harvesters are used.

Mit dem Wegeventilblock können aber auch Zusatzfunktionen an dem Fahrzeug ausgeführt werden. Beispielweise ist mit dem Wegeventilblock eine Drehzahlbegrenzung bei schneller Entlastung eines Antriebsmotors des Fahrzeuges möglich und/oder eine Federspeicher-Feststellbremse des Fahrzeuges lösbar.Additional functions can also be performed with the directional valve block be carried out on the vehicle. For example, with the directional valve block a speed limitation at faster Relief of a drive motor of the vehicle possible and / or a spring-loaded parking brake of the vehicle solvable.

Dazu wird bei dem bekannten Wegeventilblock der Steuerdruckanschluß, welcher in Neutralstellung zum Rücklauf entlastet ist, unter Druck gesetzt. Der Druckaufbau wird üblicherweise bei diesem Wegeventilblock durch ein zusätzliches Magnetwegeventil realisiert, welches zum Druckaufbau den Steuerdruckanschluß mit dem Pumpenanschluß P verbindet. Dieses zusätzliche Ventil kann z.B. ein aus der deutschen Publikation Götz. W.: "Hydraulik in Theorie und Praxis", Bosch Schulung, OMEGON Fachliteratur 1997, Seite 268, bekanntes LS-Sonderventil ohne Verbraucheranschlüsse sein, welches in einer vorbestimmten Stellung einen Speicher zum Ausführen von Zusatzfunktionen mit Druckmittel füllt.For this purpose, the control pressure connection in the known directional valve block which relieves the return in the neutral position is pressurized. The build up of pressure is common with this directional valve block by an additional one Magnetic directional control valve implemented, which is used to build up pressure Control pressure connection with the pump connection P connects. This additional valve can e.g. one from the German Publication Götz. W .: "Hydraulics in theory and practice", Bosch training, OMEGON technical literature 1997, page 268, known LS special valve without consumer connections, which in a predetermined position a memory for Execution of additional functions with pressure fluid.

Auch aus der DE 195 42 371 A1 ist eine Arbeitshydraulik mit einem LS-Wegeventilblock bekannt, welcher einen oder mehrere Verbraucher steuernde Wegeventile und eine mit den Wegeventilen verbundene Anschlußplatte, an die eine Pumpe angeschlossen ist, sowie eine Druckwaage in der Anschlußplatte aufweist, die einerseits mit Pumpendruck beaufschlagt ist und andererseits von einem an den Verbrauchern abgenommenen Signaldruck und einer Reglerfeder beaufschlagt ist. Bei dieser Lösung wirkt die LS-Hydraulik als Fahrzeugbremse. Der Wegeventilblock weist dazu ein zusätzliches 3/2-Magnetwegeventil in der Anschlußplatte auf. Das 3/2-Magnetwegeventil stellt eine Verbindung zwischen dem Steuerdruckanschluß Y und dem Pumpendruckanschluß P zum Druckaufbau her. Auch bei diesem bekannten LS-Wegeventilblock ist somit ein zusätzliches Magnetwegeventil zum Druckaufbau erforderlich.DE 195 42 371 A1 also includes working hydraulics known an LS directional valve block, which one or more Directional control valves for consumers and one with the directional control valves connected connection plate to which a pump is connected is, as well as a pressure compensator in the connection plate has pump pressure applied to it and on the other hand from one that has been purchased from consumers Signal pressure and a regulator spring is applied. at In this solution, the LS hydraulics act as a vehicle brake. The directional valve block has an additional 3/2 solenoid directional valve in the connection plate. The 3/2 solenoid directional valve provides a connection between the control pressure connection Y and the pump pressure connection P to build up pressure ago. This well-known LS directional valve block is therefore an additional solenoid directional valve for pressure build-up required.

Bei den bekannten Wegeventilblöcken ergibt sich somit der Nachteil, daß jeweils ein zusätzliches Wegeventil vorgesehen ist, um den erforderlichen Druckaufbau zum Ausführen von Zusatzfunktionen mit der Arbeitshydraulik zu gewährleisten. Dies bedeutet, daß zusätzlicher Bauraum für das weitere Magnetwegeventil bzw. Ventil und die dazugehörigen Verbindungsleitungen in dem Wegeventilblock vorgesehen sein müssen. Dadurch werden bei dem bekannten Wegeventilblock in nachteiliger Weise insbesondere die Herstellungskosten negativ beeinflußt.In the known directional valve blocks, this results in Disadvantage that an additional directional valve is provided is to build the pressure required to run to ensure additional functions with the working hydraulics. This means that additional space for the further Solenoid directional valve or valve and the associated Connection lines can be provided in the directional valve block have to. As a result, in the known directional valve block in disadvantageously in particular the manufacturing costs negative affected.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Wegeventilblock mit mehreren Wegeventilen zum Ansteuern wenigstens eines Verbrauchers mittels eines Druckmittels nach den Merkmalen des Patentanspruches 1 hat den Vorteil, daß ein bereits in dem Wegeventilblock vorhandenes Wegeventil zum Druckaufbau für Zusatzfunktionen benutzt wird, so daß hierfür kein zusätzliches Ventil bei dem erfindungsgemäßen.Wegeventilblock erforderlich ist. Damit werden nicht nur weniger Leitungen und Bauraum benötigt, sondern die Kosten insgesamt gesenkt.The directional valve block according to the invention with several directional valves to control at least one consumer by means of a pressure medium according to the features of the claim 1 has the advantage that one is already in the directional valve block existing directional valve for pressure build-up for additional functions is used, so that no additional valve for this the directional valve block according to the invention is required. In order to not only are less cables and installation space required, but lower the overall cost.

Gemäß einer vorteilhaften Weiterbildung der Erfindung kann dies dadurch erreicht werden, daß ein vorhandenes, elektrisch betätigtes Wegeventil eine Zwischenstellung aufweist, in der der Steuerdruckanschluß Y und der Rücklauf R an dem Wegeventil geschlossen ist und der Steuerdruckanschluß Y und der Pumpendruckanschluß P strömungsmäßig verbunden sind, so daß ein Druckaufbau z.B. in einem Speicher der Arbeitshydraulik des Fahrzeuges zum Ausführen von Zusatzfunktionen möglich ist.According to an advantageous development of the invention this can be achieved by having an existing, electrical operated directional valve has an intermediate position, in which the control pressure connection Y and the return R on the directional control valve is closed and the control pressure connection Y and the pump pressure port P are connected in terms of flow are so that a pressure build-up e.g. in a store the working hydraulics of the vehicle to perform additional functions is possible.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung kann bei dem Wegeventilblock wenigstens ein Wegeventil als Schieberventil mit wenigstens drei Stellungen vorgesehen sein. Somit kann das Wegeventil einerseits die herkömmlichen Funktionen, d.h. das Versorgen der angeschlossenen Verbraucher ermöglichen, und andererseits in der vorgesehenen Zwischenstellung einen Druckaufbau in dem Speicher ermöglichen, um vorbestimmte Zusatzfunktionen mit der Arbeitshydraulik des Fahrzeuges ausführen zu können.According to a further advantageous embodiment of the invention can at least one directional valve in the directional valve block provided as a slide valve with at least three positions his. Thus the directional control valve can on the one hand the conventional Functions, i.e. supplying the connected Enable consumers, and on the other hand in the intended Intermediate position enable pressure to build up in the accumulator, by predetermined additional functions with the working hydraulics to be able to execute the vehicle.

Mit dem erfindungsgemäßen Wegeventilblock kann vorzugsweise eine Federspeicher-Feststellbremse des Fahrzeuges und/oder eine Drehzahlbegrenzung bei schneller Entlastung des Antriebsmotors des Fahrzeuges oder dergleichen als Zusatzfunktionen ausgeführt werden, ohne daß konstruktive Änderungen an dem erfindungsgemäßen Wegeventilblock vorgenommen werden müssen.With the directional valve block according to the invention can preferably a spring-loaded parking brake of the vehicle and / or a speed limitation with quick relief of the drive motor of the vehicle or the like as additional functions be carried out without constructive changes made on the directional valve block according to the invention Need to become.

Das mit einer Zwischenstellung ausgestattete Wegeventil ist in den Wegeventilblock bzw. in die Arbeitshydraulik des Fahrzeuges integriert. Selbstverständlich können auch mehrere Wegeventile mit einer derartigen Zwischenstellung, bei der die Verbraucher nicht mit dem Wegeventil verbunden sind, ausgerüstet sein.The directional valve equipped with an intermediate position is in the directional valve block or in the working hydraulics of the Integrated vehicle. Of course, several can Directional control valves with such an intermediate position, at which the consumer is not connected to the directional valve are equipped.

Bei einer bevorzugten Ausgestaltung der Erfindung wird als Wegeventilblock ein sogenannter LS-Wegeventilblock verwendet, bei dem die Anschlußplatte üblicher Weise wenigstens eine Druckwaage und wenigstens ein Druckbegrenzungsventil aufweist. Selbstverständlich können in gewohnter Weise auch andere Komponenten an der Anschlußplatte vorgesehen sein. In a preferred embodiment of the invention is as Directional valve block uses a so-called LS directional valve block in which the connection plate at least in the usual way a pressure compensator and at least one pressure relief valve having. Of course you can in the usual way too other components may be provided on the connection plate.

Das Funktionsprinzip der erfindungsgemäßen Wegeventilblocks, bei dem die Druckerzeugung für Zusatzfunktionen ohne zusätzliche Bauteile, evtl. mit einer Schiebervariante kostengünstig mit Hilfe der Ansteuerelektronik im Wegeventilblock integrierbar ist, ist auf alle elektrisch betätigten LS-Wegeventile übertragbar.The principle of operation of the directional valve blocks according to the invention, where the pressure generation for additional functions without additional components, possibly with a slide variant inexpensive with the help of the control electronics in the directional valve block can be integrated is on all electrically operated LS directional valves transferable.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further advantages and advantageous configurations of the object the invention are the description, the drawing and the patent claims.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen

  • Figur 1 ein vereinfachtes Schaltbild eines erfindungsgemäßen Wegeventilblocks;
  • Figur 2 eine Detailansicht eines Wegeventils mit zusätzlicher Zwischenstellung; und
  • Figur 3 eine Steuerfolge des Wegeventils in einem Diagramm, in dem der Pumpendruck und der Volumenstrom über einen Magnetstrom dargestellt sind.
    • An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Show it
  • Figure 1 is a simplified circuit diagram of a directional valve block according to the invention;
  • FIG. 2 shows a detailed view of a directional valve with an additional intermediate position; and
  • Figure 3 shows a control sequence of the directional control valve in a diagram in which the pump pressure and the volume flow are shown via a magnetic current.

    • Beschreibung des AusführungsbeispielsDescription of the embodiment

    In Figur 1 ist ein vereinfachtes Schaltbild eines erfindungsgemäßen Wegeventilblockes 1 dargestellt, wie er für Anwendungsfälle in der Mobilhydraulik, wo mehrere Funktionen nacheinander oder gleichzeitig über Wegeventile zu steuern sind, eingesetzt wird. In üblicher Weise weist der Wegeventilblock 1 eine Anschlußplatte 2 und eine Endplatte 3 auf, über die der Zulauf und Rücklauf erfolgt. Die Anschlußplatte 2 enthält ein Druckbegrenzungsventil 4 und eine Druckwaage 5, die mit einer an die Anschlußplatte 2 angeschlossenen Pumpe 6 verbunden ist.In Figure 1 is a simplified circuit diagram of an inventive Directional valve block 1 shown as for Use cases in mobile hydraulics where multiple functions one after the other or simultaneously via directional valves taxes are used. In the usual way, the Directional valve block 1, a connection plate 2 and an end plate 3, via which the inflow and return flow takes place. The connection plate 2 contains a pressure relief valve 4 and one Pressure compensator 5, which is connected to the connection plate 2 Pump 6 is connected.

    Der vorliegende Wegeventilblock 1 stellt einen sogenannten LS(Load Sensing)-Wegeventilblock dar, wobei "Last fühlend" bedeutet, daß der variable Lastdruck in den Verbraucheranschlüssen abgetastet wird und in einer Regelung weiterverarbeitet wird.The present directional valve block 1 represents a so-called LS (Load Sensing) directional valve block, where "load sensing" means that the variable load pressure in the consumer connections is scanned and further processed in a regulation becomes.

    Der Wegeventilblock 1 weist vorliegend zwei Wegeventile 7 und 8 auf, welche parallel zueinander liegen. Zur Trennung der Lastdrücke verschiedener Verbraucher werden diese über Wechselventile 11 ausgewählt, wobei der jeweils höchste Druck der Druckwaage 5 zugeführt wird. Diese Ausgestaltung in der Art eines Drei-Wege-Stromreglers, bietet wesentliche Vorteile für den praktischen Betrieb.The directional valve block 1 has two directional valves 7 in the present case and 8, which are parallel to each other. For separation The load pressures of different consumers are over Shuttle valves 11 selected, the highest Pressure of the pressure compensator 5 is supplied. This configuration in the manner of a three-way current regulator, provides essential Advantages for practical operation.

    Die Wegeventile 7, 8 haben jeweils Verbraucheranschlüsse A und B, einen Rücklauf R, einen Pumpenanschluß P und einen Steuerdruckanschluß Y. Das Wegeventil 7 weist drei Stellungen auf, wobei eine Neutralstellung mit 0 und die beiden Arbeitsstellungen mit I und II bezeichnet sind.The directional control valves 7, 8 each have consumer connections A and B, a return R, a pump connection P and one Control pressure connection Y. The directional control valve 7 has three positions on, with a neutral position with 0 and the two Working positions are labeled I and II.

    Das Wegeventil 8 weist neben den Stellungen 0, I, II eine zusätzliche Zwischenstellung III auf. Bei dieser Zwischenstellung III sind die Verbraucheranschlüsse A, B verschlossen und der Steuerdruckanschluß Y mit dem Pumpendruckanschluß P verbunden. In der Zwischenstellung III kann ein über die Endplatte 3 an den Wegeventilblock 1 angeschlossener Speicher 9 mit Druckmittel über das Wegeventil 8 befüllt werden. Dadurch wird in dem Speicher 9 ein Druck aufgebaut, um mit dem erfindungsgemäßen Wegeventilblock 1 Zusatzfunktionen an dem Fahrzeug ausführen zu können. Der Druckaufbau in dem Speicher 9 erfolgt in Abhängigkeit von einem entsprechenden Signal eines Druckschalters 10, der mit dem Wegeventilblock 1 gekoppelt ist.The directional control valve 8 has a position in addition to the positions 0, I, II additional intermediate position III. At this intermediate position III, the consumer connections A, B are closed and the control pressure port Y with the pump pressure port P connected. In the intermediate position III a connected to the directional valve block 1 via the end plate 3 Memory 9 filled with pressure medium via the directional valve 8 become. As a result, a pressure is built up in the memory 9, to additional functions with the directional valve block 1 according to the invention to be able to perform on the vehicle. The Pressure build-up in the memory 9 is dependent on a corresponding signal from a pressure switch 10, the is coupled to the directional valve block 1.

    Figur 2 zeigt einen Ausschnitt des erfindungsgemäßen Wegeventilblocks 1, bei dem das Wegeventil 8 mit der Zwischenstellung III dargestellt ist.Figure 2 shows a section of the directional valve block according to the invention 1, in which the directional valve 8 with the intermediate position III is shown.

    In Figur 3 ist ein Diagramm dargestellt, bei dem eine vorbestimmte Steuerfolge 0-I-II des Wegeventils 8 gezeigt ist. Bei dieser Ansteuerung wird zunächst aus der Neutralstellung 0 in die Zwischenstellung III und dann in die Arbeitsstellung I geschaltet. Das Diagramm zeigt den Pumpendruck(Pd)-Volumenstrom(Q)-Verlauf über einen Magnetstrom (I) zum Ansteuern des Proportional-Wegeventils 8. Ein Ansprechstrom I1 zum Druckaufbau in dem Speicher 9 hat einen ausreichenden Abstand zum Beginn einer Arbeitsfunktion I2. In der Zwischenstellung III wird ein maximaler Pumpendruck bzw. Druckbegrenzungsventil(DBV)-Druck PDBV erreicht, welcher in der Arbeitsstellung I auf einen erforderlichen Lastdruck PLast absinkt, sobald ein Ölstrom zu einem Verbraucher fließt.
    Wie der Figur 3 zu entnehmen ist, steigt der Volumenstrom Q in der Arbeitsstellung I des Wegeventils 8 kontinuierlich an, bis der Verbraucher mit Öl versorgt ist, und weist dann einen konstanten Verlauf auf.    FIG. 3 shows a diagram in which a predetermined control sequence 0-I-II of the directional control valve 8 is shown. With this control, it is first switched from neutral position 0 to intermediate position III and then to working position I. The diagram shows the pump pressure (P d ) volume flow (Q) curve via a solenoid current (I) for controlling the proportional directional valve 8. A response current I1 for building up pressure in the memory 9 has a sufficient distance from the start of a work function I2. In intermediate position III, a maximum pump pressure or pressure relief valve (DBV) pressure P DBV is reached, which in working position I drops to a required load pressure P load as soon as an oil flow flows to a consumer.
    As can be seen in FIG. 3, the volume flow Q increases continuously in the working position I of the directional control valve 8 until the consumer is supplied with oil, and then has a constant course.

    Claims (8)

    Wegeventilblock (1) mit mehreren Wegeventilen (7, 8) zum Ansteuern wenigstens eines Verbrauchers mittels eines Druckmittels und mit einer Einrichtung zum Druckaufbau für ein Ausführen von Zusatzfunktionen, dadurch gekennzeichnet, daß eines der Wegeventile (8) zusätzlich als Ventil zum Druckaufbau für das Ausführen von Zusatzfunktionen ausgebildet ist.Directional valve block (1) with a plurality of directional valves (7, 8) for actuating at least one consumer by means of a pressure medium and with a device for building up pressure for performing additional functions, characterized in that one of the directional valves (8) additionally as a valve for building up pressure for the execution is formed by additional functions. Wegeventilblock nach Anspruch 1, dadurch gekennzeichnet, daß das Wegeventil eine Zwischenstellung (III) aufweist, bei der ein Speicher (9) zum Druckaufbau mit Druckmittel füllbar ist.Directional valve block according to claim 1, characterized in that the directional valve has an intermediate position (III), in which a reservoir (9) can be filled with pressure medium to build up pressure. Wegeventilblock nach Anspruch 2, dadurch gekennzeichnet, daß in der Zwischenstellung (III) ein Anschluß (A,B) jedes Verbrauchers des Wegeventils (8) verschlossen ist und daß ein Steuerdruckanschluß (Y) und ein Pumpenanschluß (P) des Wegeventils (8) strömungsmäßig zum Füllen des Speichers (9) verbunden sind.Directional valve block according to Claim 2, characterized in that in the intermediate position (III) a connection (A, B) of each consumer of the directional valve (8) is closed and that a control pressure connection (Y) and a pump connection (P) of the directional valve (8) are flow-controlled are connected to fill the memory (9). Wegeventilblock nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Wegeventil (8) elektrisch betätigt ist.Directional valve block according to one of claims 1 to 3, characterized in that the directional valve (8) is electrically actuated. Wegeventilblock nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Wegeventil (8) als ein Schieberventil mit wenigstens vier Stellungen (0, I, II, III) ausgebildet ist.Directional valve block according to one of claims 1 to 4, characterized in that the directional valve (8) is designed as a slide valve with at least four positions (0, I, II, III). Wegeventilblock nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Wegeventil (8) in eine Arbeitshydraulik eines Fahrzeuges integriert ist.Directional valve block according to one of claims 1 to 5, characterized in that the directional valve (8) is integrated in a working hydraulic system of a vehicle. Wegeventilblock nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß dieser als ein Load Sensing (LS)-Wegeventilblock (1) ausgebildet ist.Directional valve block according to one of claims 1 to 6, characterized in that it is designed as a load sensing (LS) directional valve block (1). Wegeventilblock nach einem der Ansprüche 1 bis 7, gekennzeichnet durch eine Anschlußplatte (2), an welche eine Pumpe (6) angeschlossen ist und die zumindest eine Druckwaage (5) und ein Druckbegrenzungsventil (4) aufweist.Directional valve block according to one of claims 1 to 7, characterized by a connecting plate (2) to which a pump (6) is connected and which has at least one pressure compensator (5) and a pressure limiting valve (4).
    EP20010124579 2000-12-16 2001-10-09 Directional valve block Expired - Lifetime EP1215397B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10062893 2000-12-16
    DE2000162893 DE10062893A1 (en) 2000-12-16 2000-12-16 Way valve block

    Publications (3)

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    EP1215397A2 true EP1215397A2 (en) 2002-06-19
    EP1215397A3 EP1215397A3 (en) 2003-12-10
    EP1215397B1 EP1215397B1 (en) 2006-05-17

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    DE (2) DE10062893A1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
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    CN102720710A (en) * 2012-06-26 2012-10-10 中联重科股份有限公司 Hydraulic system, method for controlling hydraulic system and engineering machinery
    CN104141650A (en) * 2014-07-29 2014-11-12 浙江海宏液压科技股份有限公司 Load sensitive forklift multi-way valve
    CN109083890A (en) * 2018-08-23 2018-12-25 江苏理工学院 A kind of assignment of traffic double valve-regulated load port separate control valves unrelated with load

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    DE19542371A1 (en) 1995-11-14 1997-05-15 Bosch Gmbh Robert Valve block with passages for fluid

    Family Cites Families (2)

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    DE3930553A1 (en) * 1989-09-13 1991-03-14 Bosch Gmbh Robert Lifting mechanism hydraulic control system - has pressure-equalisers for flow to and from pressure accumulator
    JP3892495B2 (en) * 1996-04-17 2007-03-14 株式会社 神崎高級工機製作所 Hydraulic supply device for work vehicle

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    Publication number Priority date Publication date Assignee Title
    DE19542371A1 (en) 1995-11-14 1997-05-15 Bosch Gmbh Robert Valve block with passages for fluid

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN102720710A (en) * 2012-06-26 2012-10-10 中联重科股份有限公司 Hydraulic system, method for controlling hydraulic system and engineering machinery
    CN102720710B (en) * 2012-06-26 2015-09-16 中联重科股份有限公司 The controlling method of hydraulic system, hydraulic system and engineering machinery
    CN104141650A (en) * 2014-07-29 2014-11-12 浙江海宏液压科技股份有限公司 Load sensitive forklift multi-way valve
    CN109083890A (en) * 2018-08-23 2018-12-25 江苏理工学院 A kind of assignment of traffic double valve-regulated load port separate control valves unrelated with load

    Also Published As

    Publication number Publication date
    DE50109807D1 (en) 2006-06-22
    EP1215397A3 (en) 2003-12-10
    EP1215397B1 (en) 2006-05-17
    DE10062893A1 (en) 2002-06-20

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