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DE2939327A1 - Control block for several hydraulic consumer appliances - has restrictor incorporated in control slide of multiway valves - Google Patents

Control block for several hydraulic consumer appliances - has restrictor incorporated in control slide of multiway valves

Info

Publication number
DE2939327A1
DE2939327A1 DE19792939327 DE2939327A DE2939327A1 DE 2939327 A1 DE2939327 A1 DE 2939327A1 DE 19792939327 DE19792939327 DE 19792939327 DE 2939327 A DE2939327 A DE 2939327A DE 2939327 A1 DE2939327 A1 DE 2939327A1
Authority
DE
Germany
Prior art keywords
control
connections
valve
connection
slide
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
DE19792939327
Other languages
German (de)
Other versions
DE2939327C2 (en
Inventor
Sönke Larsen
Peter 8770 Lohr Müller
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.)
Bosch Rexroth AG
Original Assignee
GL Rexroth GmbH
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 GL Rexroth GmbH filed Critical GL Rexroth GmbH
Priority to DE19792939327 priority Critical patent/DE2939327C2/en
Publication of DE2939327A1 publication Critical patent/DE2939327A1/en
Application granted granted Critical
Publication of DE2939327C2 publication Critical patent/DE2939327C2/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
    • 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
    • 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
    • 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
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
    • F15B2211/40569—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged downstream 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
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Landscapes

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

Abstract

The control block is for two or more hydraulic consumer appliances, eso. a fork lift truck, which are simultaneously supplied from a single source. It has a three- way flow control and several multi-way valves with control slides. In one control end position of a slide of the first valve, the associated consumer appliance is connected to one of the connections of the three-way flow control, as in 2722238. In at least one end position of the control slide, in at least one multi-way valve, the pump connection is connected via a removable restrictor, with the connections of this multi-way valve, which are through-connected via the control slide. Pref. the restrictor is exchangeable.

Description

"Steuerblock für mehrere zugleich schaltbare hydraulische"Control block for several hydraulics that can be switched at the same time

Verbraucher" Zusatz zu Patent ... (Patentanmeldung P 27 22 238.4-13) Die Erfindung betrifft einen Steuerblock entsprechend dem Oberbegriff des Anspruches 1.Consumer "addendum to patent ... (patent application P 27 22 238.4-13) The invention relates to a control block according to the preamble of the claim 1.

Bei einem bekannten Steuerblock der vorgenannten Art ist die einem de: Verbraucher maximal zuführbare Druckmittelmenge in der Zeiteinheit durch den maximalen Durchfluß durch den Drei-Wege- Stromreaeler begrenzt (DE-OS 27 22 238).In a known control block of the aforementioned type is the one de: Consumers maximum amount of pressure medium that can be supplied in the unit of time by the maximum flow limited by the three-way Stromreaeler (DE-OS 27 22 238).

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, mindestens einem Verbraucher eine größere Druckmittelmenge in der Zeiteinheit zuführen zu können, als durch den Drei-Wege-Stromregler bestimmt ist. Diese Aufqabe wird durch die Merkmale im Kennzeichnungsteil des Anspruches 1 erfindungsgemäß gelöst. Über die im Steuerschieber einer der Wegeventile eingeschaltete Meßblende kann einem Verbraucher zusätzlich Druckmittel zu der vom Drei-Wee-Stromregeler begrenzten maximalen Druckmittelmenge in der Zeiteinheit zugeführt werden. An der Meßblende im Steuerschieber herrscht beim Durchfluß von Druckmittel die gleiche Druckdifferenz, wie in der dem Drei-Wese-Stromrealer zuaeordneten Meßblende.The present invention is based on the object at least to be able to supply a consumer with a larger amount of pressure medium per unit of time, than is determined by the three-way current regulator. This task is made possible by the features solved in the characterizing part of claim 1 according to the invention. About the one in the control slide one of the directional control valves switched on measuring orifice can also be used by a consumer Pressure medium to the maximum amount of pressure medium limited by the three-way flow regulator are supplied in the unit of time. There is at the measuring orifice in the control slide when the pressure medium flows through the same pressure difference as in the measuring orifice assigned to the Drei-Wese-Stromrealler.

Der Durchfluß von Druckmittel durch die im Steuerschieber vorhandene Meßblende wird damit vom Stromreeler ebenfalls konstant gehalten. Von gerinqfügioen Druckverlusten in den Verbindungskanälen kann hierbei aboesehen werden.The flow of pressure medium through the existing in the control slide The measuring orifice is thus also kept constant by the current regulator. From small Pressure losses in the connecting channels can be seen here.

Das Merkmal des Anspruches 2 betrifft eine bevorzuate Weiterbildung.The feature of claim 2 relates to a preferred development.

Weitere Vorteile eraeben sich aus der Beschreibunn und der Zeichnung. In dieser ist ein Schaltplan eines Steuerblockes als Ausführungsbeispiel des Geeenstandes der Erfindunq schematisch dargestellt.Further advantages emerge from the description and the drawing. In this is a circuit diagram of a control block as an exemplary embodiment of the Geeenstandes the invention shown schematically.

Der Steuerblock 1 ist durch die strichpunktierte Linie darsestellt. Am Steuerblock 1 befinden sich Verbraucheranschlirsse Al, Bi, A2, B2, A3, B3, A.4 und B4, ein Anschluß s an einen Vorratsbehälter und ein AnschluR P an eine Druckmittelquelle. Verbraucher, Vorratsbehälter und Druckmittelquelle sind nicht dargestellt. Der Steuerblock 1 weist jeweils mit Steuerschiebern versehene 6/3-Wegeventile 2 bis 5 auf die jeweils von Hand betätigbar sind. Jedes der Weaeventile hat mit a bis f bezeichnete Anschlfisse. In der Mittellage der Steuerschieber der Weaeventile 2 bis 5 sind jeweils die in der Zeichnung einander gegenüberliegenden Anschlüsse b und e miteinander verbunden, wogegen die übriaen Anschlüsse a, c, d, und f, gesperrt sind, so daß der Pumpenanschluß P über die Kanalabschnitte 6a, ft, 6c, 6d und 6e rnit dem TankanschluF T verbunden ist und Druckmittel unmittelbar vom Pumpenanschluß P bis zum TankanschluP ir strömen kann ohne Arbeit zu leisten.The control block 1 is represented by the dash-dotted line. On the control block 1 there are consumer connections Al, Bi, A2, B2, A3, B3, A.4 and B4, a connection s to a storage container and a connection P to a pressure medium source. Consumers, reservoirs and pressure medium source are not shown. The control block 1 has 6/3-way valves 2 to 5, each provided with control spools, on each of the can be operated by hand. Each of the Weaeventile has connections marked a to f. The in Connections b and e opposite to each other in the drawing, whereas the other connections a, c, d, and f, are blocked, so that the pump connection P is connected to the tank connection T via the channel sections 6a, ft, 6c, 6d and 6e and pressure medium flows directly from the pump connection P to the tank connection ir can do without work.

Am Abzweigpunkt 7 des Kanalabschnittes 6a führt ein Kanal zu einem Drei-Weve-Stromregeler 9 mit fest eingestellter Blende 10. Der Stromregeler 9 ist in Schließrichtung über eine Steuerleitung 11 von dem unter Pumpendruck stehenden Druckmittel und in öffnungsrichtung über eine Steuerleitung 13 mit einer DSmpfunfsdrossel 14 von dem hinter der Drossel 10 herrschenden Druck des Druckrittels beaufschlagbar. Eine Regelfeder 12 übt auf das im Stromregler 9 vorhandene Regelglied eine Kraft ebenfalls in öffnungsrichtung in bezug auf die Verbindung zwischen den Anschlüssen 9c und 9a und eine Kraft in Schließrichtung in bezug auf die andere den Anschlug 9b aufweisende Verbindung aus. Ein Auslaß 9a des Stromreglers 9 ist über einen Kanal 15 sowie daran angeschlossene Kanalabschnitte 15a, 15b mit den jeweiligen Anschlüssen d der Weaeventile 2 bis 4 verbunden. Ein Auslaß 9b des Stromregelers 9 ist über einen Kanal 16 mit den Anschlüssen h und c des Weaeventils 5 verbunden. Bei von der Druckmittelauelle gefordertem Druckmittel tritt am Ausgang 9a des Stromreglers 9 ein geregelter Druckmittelstrom entsprechend dem Durchflußquerschnitt der Drossel 10 und dem aus der Federkennlinie der Regelfeder 12 des Stromregler 9 sich ergebendem Druckgefälle vor und hinter der Drossel 10 aus, wogegen aus dem Ausgang 9b des Stromreglers 9 die ungeregelte Restmenge an Druckmittel ausfließt.At the branch point 7 of the channel section 6a, a channel leads to one Three-wave current regulator 9 with a fixed aperture 10. The current regulator 9 is in the closing direction via a control line 11 from the one under pump pressure Pressure medium and in the opening direction via a control line 13 with a DSmpfunfsdrossel 14 from the pressure of the pressure third prevailing downstream of the throttle 10 can be charged. A control spring 12 acts on the control element present in the current regulator 9 a force also in the opening direction with respect to the connection between the Terminals 9c and 9a and a force in the closing direction with respect to the other the connection having the stop 9b. An outlet 9a of the flow regulator 9 is Via a channel 15 and channel sections 15a, 15b connected to it with the respective connections d of the Weaeventile 2 to 4 connected. An outlet 9b of the flow regulator 9 is connected to connections h and c of weave valve 5 via a channel 16. When pressure medium is required by the pressure medium source, the flow regulator is output 9a 9 a regulated pressure medium flow corresponding to the flow cross section of the throttle 10 and that resulting from the spring characteristic of the control spring 12 of the current regulator 9 Pressure gradient in front of and behind the throttle 10, whereas from the output 9b of the flow regulator 9 the unregulated residual amount of pressure medium flows out.

Von den Anschlüssen d und f jedes Wegeventils 2 bis 5 fuhren Kanäle al, bl, a2, b2, a3, b3, a4 und b4 zu den jeweils zugeordneten Verbraucheranschlüssen Al bis B4. Mit den Arbeitskanälen a3, b3, a4 und b4 stehen zusätzlich Druckbegrenzungsventile 18, 19, 20 und 21 zur ttberwachuna des maximal zulässigen Druckes in dem zu dem betreffenden Verbraucher führenden Anschlußkanal in Verbindung. Im Arbeitskanal b2 ist ein Vorspannventil 17 angeordnet, das in Richtung des Verbrauchers über ein Rückschlagventil 22 zu umgehen ist und in Gegenrichtung als Stützventil für den Verbraucher dient. Channels 2 to 5 lead from ports d and f of each directional control valve al, bl, a2, b2, a3, b3, a4 and b4 to the respectively assigned consumer connections Al to B4. With the working channels a3, b3, a4 and b4 there are additional pressure relief valves 18, 19, 20 and 21 for monitoring the maximum allowable pressure in the relevant consumer leading connection channel in connection. In the working channel b2 a preload valve 17 is arranged, which in the direction of the consumer via a Check valve 22 is to bypass and in the opposite direction as a support valve for the Serves consumer.

Mit dem mit dem Pumpenanschluß P verbundenen Kanalabschnitt 6a steht über den Verzweigungspunkt 7 und einen Kanalabschnitt 25 auch ein Druckbegrenzungsventil 27 in Verbindung, dessen Auslaßkanal 28 zu einem mit dem TankanschluR T verbundenen Kanal 29 führt. Sobald der Druck an der Anschlußstelle P der Pumpe den an diesen Druckbegrenzungsventil eingestellten Wert übersteigt, spritzt dieses in Richtung des Tankanschlusses T ab. Eine Steuerleitung 30 des Druckbearenzungsventils 27 ist über den Abzweiopunkt 31 ebenfalls mit dem Kanalabschnitt 6a verbunden. Der Verbraucheranschluß Al ist durch einen Stopfen 33 abgeschlossen. With the channel section 6a connected to the pump connection P stands Via the branch point 7 and a channel section 25, there is also a pressure relief valve 27 in connection, the outlet channel 28 of which is connected to a tank connection T Channel 29 leads. As soon as the pressure at connection point P the pump exceeds the value set on this pressure relief valve, it will spray in the direction of the tank connection T. A control line 30 of the pressure relief valve 27 is also connected to the channel section 6a via the two-point 31. Of the Consumer connection A1 is closed by a plug 33.

In der Mittellage des Steuerschiebers des Wegeventils 5 sind nur die Anschlüsse b und c miteinander verbunden und die Anschlüsse a, c, d und f sind gesperrt. In der linken Steuerendlage sind die Anschlüsse b und e sowie f und a miteinander verbunden, wogegen die übrigen Anschlüsse c und d gesperrt sind. In der rechten Steuerendlage des Steuerschiebers sind die Anschlüsse a, b, d, e gesperrt und die Anschlüsse c und f sind über ein zum Anschluß f öffenbares Riickschlagventil 34 miteinander verbunden. Die Bezeichnungen linke Steuerendlage und rechte Steuerendlage sind willkürlich gewählt und können nach Belieben ausgetauscht werden.In the central position of the spool of the directional valve 5 are only the Ports b and c are interconnected and ports a, c, d and f are blocked. Connections b and e as well as f and a are in the left control end position connected, while the other ports c and d are blocked. In the right In the control end position of the control spool, ports a, b, d, e are blocked and the Ports c and f are via a non-return valve 34 which can be opened to port f connected with each other. The designations left control end position and right control end position are chosen arbitrarily and can be exchanged at will.

In der Mittellage des Steuerschiebers des Wegeventils 4 sind die Anschlüsse b und e miteinander verbunden sowie die An-Anschlüsse a, d und f, wogegen der Anschluß c gesperrt ist.The connections are in the central position of the control slide of the directional control valve 4 b and e connected to each other and the connection ports a, d and f, whereas the connection c is locked.

In der linken Steuerendage des Steuerschiebers sind die Anschlüsse c und d sowie a und f miteinander verbunden, wogegen die übrigen Anschlüsse gesperrt sind. nd in der rechten Steuerend1age Aes Steuerschebers sind die Anschlüsse a und d miteinander verbunden sowie über ein zum Anschluß f öffnendes Rückschlagventil die Anschlüsse c und f, wogegen die Anschlsse b und e gesperrt sind.The connections are in the left control end of the control slide c and d as well as a and f are connected to one another, whereas the other connections are blocked are. nd in the right control end position of the control slide are the connections a and d connected to one another and via a check valve opening to connection f connections c and f, whereas connections b and e are blocked.

In der Mittellage des Steuerschiebers des Wegeventils 3 sind die Anschlüsse b und e miteinander verbunden, wogegen die übrigen Anschlüsse gesperrt sind. In der linken Steuerendlage des Steuerschiebers sind die Anschlüsse c und d sowie f und a miteinander verbunden, wogegen die übrigen Anschlüsse gesperrt sind, und in der rechten Steuerendlage des Steurschiebers sind die Anschlüsse d und a sowie f und c mit einander verbunden, wogegen die übrigen Anschlüsse gesperrt sind.The connections are in the central position of the control slide of the directional control valve 3 b and e are connected to each other, while the other connections are blocked. In the left control end position of the control spool are ports c and d as well as f and a are connected to one another, whereas the other connections are blocked, and in of the right control end position of the control slide are ports d and a as well as f and c with connected to each other, whereas the other connections are blocked are.

In der mittleren Steuerlage des Steuerschiebers des Weceventils 2 sind die Anschlüsse b und e miteinander verbunden, wogegen die übrioen Anschlüsse gesperrt sind. In der linken Steuerendlaqe des Steuerschiebers sind die Anschlüsse f und a sowie die Anschlüsse b, c und d miteinander verbunden, wobei zwischen dem Anschluß b und den übrigen beiden Anschlüssen eine auswechselbare Meßhlende 35 eingeschaltet ist. Der Anschluß e ist gesperrt. In der rechten Steuerendlaae des Steuerschiebers des Wegeventils 2 sind die Anschlüsse d und a miteinander verbunden sowie die Anschlüsse b, c und f, wobei zwischen dem Anschluß b und den Anschlüssen c und f eine auswechselbare Meßblende 36 eingeschaltet ist. DerAnschluß e ist gesperrt.In the middle control position of the control spool of Wece valve 2 Connections b and e are connected to one another, whereas the other connections are locked. The connections are in the left control end of the control slide f and a and the connections b, c and d connected to one another, with between the Connection b and the other two connections an exchangeable measuring end 35 switched on is. Port e is blocked. In the right control end of the control slide of directional control valve 2, ports d and a are connected to one another, as are the ports b, c and f, with an interchangeable between the connection b and the connections c and f Orifice 36 is turned on. Port e is blocked.

Wird der Steuerschieber des Wegeventils 5 aus der dareestellten Mittellage in seine rechte Steuerendlage verschoben, so sind wie vorstehend dargelegt, die Anschlüsse a, h, d und e gesperrt, wogegen die Anschlüsse c und f über das Riickschlaqventil 34 miteinander verbunden sind. Damit wird die Verbindung zum Tankanschluß T unterbrochen und es besteht eine Verbindung zwischen dem Kanal 16, dem Kanalabschnitt 6d1, dem Rückschlagventil 34 zum Kanal bt, der mit dem Verbraucheranschluß 31 verbunden ist. In der rechten Steuerendlage besteht je eine Verbindung zwischen dem Vorratsbehälter und dem Kanal bl und zwischen dem VorratsbehGlter und dem Kanal 6d.If the control slide of the directional valve 5 is out of the middle position shifted into its right control end position, as explained above, the Ports a, h, d and e blocked, while ports c and f are blocked via the non-return valve 34 are connected to each other. The connection to the tank connection T is thus interrupted and there is a connection between the channel 16, the channel section 6d1, the Check valve 34 to channel bt, which is connected to consumer connection 31. In the right control end position there is a connection between the storage container and the channel bl and between the storage container and the channel 6d.

Wird in der vorbeschriebenen Steuerendlage des Steuerschiebers des Wegeventils 5 der Steuerschieher des Wegeventils 3 derart betätigt, daß einer der Verbraucheranschlüsse A3 bzw. B3 mit dem Kanalabschnitt 15b verbunden ist, so wird die Verbindung zwischen der Pumpenanschluß P und dem Wegeventil 5 unterbrochen und damit auch die unmittelbare verbindung des Verbraucheranschlusses B1 mit dem PumDenanschluß P. Der angesteuerte Verbraucheranschluß A3 bzw. B3 erhält dlp am Drei-Wege-Stromregler 9 durch die Drossel 10 und die Regelfeder 12 bestimmte Druckmittelmenge in der Zeiteinheit, wogegen dem Weqeventil 5 über den Kanal 16 nunmehr lediglich die Rest-Druckmittelmenge zugeführt wird. Das gleiche gilt, wenn der Steuerschieber des Wegeventils 4 betätigt wird, während sich der Steuerschieber des Wegeventils 5 in der vorbeschriehenen rechten Steuerendlage befindet.Is in the above-described control end position of the control spool of the Directional valve 5 of the spool valve 3 operated so that one of the Consumer connections A3 or B3 is connected to the channel section 15b, so is the connection between the pump connection P and the directional control valve 5 interrupted and with it the direct connection of the consumer connection B1 with the PumDen connection P. The activated consumer connection A3 or B3 receives dlp on the three-way current regulator 9 by the throttle 10 and the control spring 12 determined The amount of pressure medium in the unit of time, whereas the weqeventil 5 via the channel 16 now only the remaining amount of pressure medium is supplied. The same is true if the control slide of the directional control valve 4 is operated while the control slide of the directional control valve 5 is in the pre-described right control end position.

In einer der Steuerendlagen des Steuerschiebers des Wegeventils 2 ist der Kanal a4 bzw. b4 sowohl mit dem Ausaang 9a als auch über die Meßblende 35 bzw. 36 mit dem Pumpenanschluß P verbunden Damit wird der vom Stromregler 9 kommenden Druckmittelmenge über die eblende 35 bzw. 36 eine zusätzliche Druckmittelmenge In der Zeiteinheit z-ugefü-hrt Reim Durchfluß von Druckmittel durch eine der Blenden 35 oder 36 entsteht an dieser aie gleiche geregelte Druckdifferenz wie bei der Meßblende 10 im Str-orrre-gler 9, wobei von den geringfügigen Druckverlusten In den Verbindungskanälen abgesehen werden kann. Die in der Zeiteinheit durch die MeRblende 35 oder 3Ç hindurch fließende Druckmittelmenge wird damit vom Stromrealer 9 ebenfalls konstant gehalten.In one of the control end positions of the control spool of directional control valve 2 is the channel a4 or b4 both with the output 9a and via the measuring orifice 35 or 36 is connected to the pump connection P Pressure medium amount via the orifice 35 or 36 an additional pressure medium amount In the unit of time z-udu-heit rhyme flow of pressure medium through one of the diaphragms 35 or 36 arises at this aie the same regulated pressure difference as with the measuring orifice 10 in the flow regulator 9, whereby of the slight pressure losses in the connecting ducts can be disregarded. In the unit of time through the metering orifice 35 or 3Ç The flow of pressure medium is thus also kept constant by the flow realler 9.

Die Durch flußquer schnitte der auswechselbaren Meßblenden 35 und 36 können gleich oder unterschiedlich sein.The cross sections of the interchangeable orifice plates 35 and 36 can be the same or different.

Der Steuerschieber eines der anderen Wegeventile 3 oder 4 oder die Steuerschieber der anderen Wegeventile kdnnen in gleicher Weise wie der Steuerschieber des Wegeventils 2 ausgebildet sein.The spool of one of the other directional control valves 3 or 4 or the The control spool of the other directional control valves can be operated in the same way as the control spool of the directional control valve 2 be formed.

Claims (2)

Anspriiche 1Steuerblock für mindestens zwei zugleich aus einer einzigen Druckmittelquelle mit Druckmittel versorgbaren, insbesondere bei Hubstaplern voroesehenen hydraulischen Verbrauchern, mit mindestens einem Drei-Wege-Stromregler und mit mindestens zwei 6/3-Wegeventilen, deren Steuerschieber in ihrer Mittellage jeweils zwei Anschlüsse desselben Wegeventils miteinander verbinden und die übrigen Anschlüsse sperren, wobei die beiden Wegeventile über je einen der durchverbundenen Anschlüsse miteinander verbunden sind, wobei der andere durchverbundene Anschluß des ersten Wegeventils mit der Druckmittelquelle und der andere durchverbundene Anschluß des zweiten Wegeventils mit einem Vorratsbehälter verbunden ist und wobei in einer der Steuerendlagen des Steuerschiebers des ersten Wegeventiles der diesem jeweils zugeordnete Verbraucher mit jeweils einem der Anschlüsse des Drei-Wege-Stromreglers verbunden ist, nach Patent .... (Patentanmeldung P 27 22 238.4-13), dadurch g e k e n n -z e i c h n e t , daß in mindestens einer der Steuerendlaaen des Steuerschiebers bei mindestens einem der Wegeventile (2 bis 4) der Pumpenanschluß (P) über eine Meßblende (35, 36) mit den vom Steuerschieber durchverbundenen Anschlüssen desselben Wegeventils verbunden ist. Claims 1 control block for at least two at the same time from a single one Pressure medium source which can be supplied with pressure medium, in particular provided in forklift trucks hydraulic consumers, with at least one three-way flow regulator and with at least two 6/3-way valves, the control spool of which has two connections in its central position connect the same directional valve with each other and block the other connections, the two directional control valves each via one of the through-connected connections are connected, the other through-connected connection of the first directional control valve with the pressure medium source and the other through-connected connection of the second directional control valve is connected to a storage container and wherein in one of the control end positions of the Control slide of the first directional valve of the consumer assigned to it is connected to one of the connections of the three-way current regulator, according to Patent .... (patent application P 27 22 238.4-13), thus g e k e n n n -z e i c h n e t that in at least one of the Steuerendlaaen of the control slide at at least one of the directional control valves (2 to 4) the pump connection (P) over a Measuring orifice (35, 36) with the connections of the same through-connected by the control slide Directional valve is connected. 2. Steuerblock nach Anspruch 1, dadurch g e k e n n -z e i c h n e t , daß die Meßblende (35, 36) auswechselbar ist.2. Control block according to claim 1, characterized in that g e k e n n -z e i c h n e t that the measuring orifice (35, 36) is replaceable.
DE19792939327 1979-09-28 1979-09-28 Control block for several hydraulic consumers that can be switched at the same time Expired DE2939327C2 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514083A1 (en) * 1981-10-06 1983-04-08 Bosch Gmbh Robert HYDRAULIC CONTROL APPARATUS HAVING AT LEAST TWO DISTRIBUTORS FOR CONTROLLING HYDRAULIC USERS, PARTICULARLY FOR A STACKING TROLLEY
DE3637174A1 (en) * 1986-10-31 1988-05-05 Rexroth Mannesmann Gmbh Piston engine with changeable displacement
US4807519A (en) * 1986-10-31 1989-02-28 Mannesmann Rexroth Gmbh Piston machine with changeable displacement
EP2891805A3 (en) * 2013-12-02 2015-09-02 Robert Bosch Gmbh Control assembly and a control valve for such a control assembly
US20170139428A1 (en) * 2015-11-18 2017-05-18 Robert Bosch Gmbh Valve with Flow Control and Pressure Limitation Function
CN109139598A (en) * 2018-08-23 2019-01-04 江苏理工学院 A kind of double valve-regulated load port separate control valves based on the compensation of machine hydraulic pressure difference
CN111022075A (en) * 2019-10-29 2020-04-17 中铁五局集团第一工程有限责任公司 Hydraulic system of tunnel equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19605992A1 (en) * 1996-02-17 1997-08-21 Rexroth Mannesmann Gmbh Hydraulic control unit for bucket e.t.c. excavators using two six-way valves

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722238A1 (en) * 1977-05-17 1978-11-23 Rexroth Gmbh G L CONTROL BLOCK FOR SEVERAL HYDRAULIC CONSUMERS TO BE SWITCHED AT THE SAME TIME

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722238A1 (en) * 1977-05-17 1978-11-23 Rexroth Gmbh G L CONTROL BLOCK FOR SEVERAL HYDRAULIC CONSUMERS TO BE SWITCHED AT THE SAME TIME

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514083A1 (en) * 1981-10-06 1983-04-08 Bosch Gmbh Robert HYDRAULIC CONTROL APPARATUS HAVING AT LEAST TWO DISTRIBUTORS FOR CONTROLLING HYDRAULIC USERS, PARTICULARLY FOR A STACKING TROLLEY
DE3637174A1 (en) * 1986-10-31 1988-05-05 Rexroth Mannesmann Gmbh Piston engine with changeable displacement
US4807519A (en) * 1986-10-31 1989-02-28 Mannesmann Rexroth Gmbh Piston machine with changeable displacement
EP2891805A3 (en) * 2013-12-02 2015-09-02 Robert Bosch Gmbh Control assembly and a control valve for such a control assembly
US20170139428A1 (en) * 2015-11-18 2017-05-18 Robert Bosch Gmbh Valve with Flow Control and Pressure Limitation Function
CN109139598A (en) * 2018-08-23 2019-01-04 江苏理工学院 A kind of double valve-regulated load port separate control valves based on the compensation of machine hydraulic pressure difference
CN111022075A (en) * 2019-10-29 2020-04-17 中铁五局集团第一工程有限责任公司 Hydraulic system of tunnel equipment
CN111022075B (en) * 2019-10-29 2021-02-12 中铁五局集团第一工程有限责任公司 Tunnel equipment

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