EP3759357A1 - Système de soupape pour l'alimentation en fluide sous pression d'un utilisateur hydraulique - Google Patents

Système de soupape pour l'alimentation en fluide sous pression d'un utilisateur hydraulique

Info

Publication number
EP3759357A1
EP3759357A1 EP19718099.5A EP19718099A EP3759357A1 EP 3759357 A1 EP3759357 A1 EP 3759357A1 EP 19718099 A EP19718099 A EP 19718099A EP 3759357 A1 EP3759357 A1 EP 3759357A1
Authority
EP
European Patent Office
Prior art keywords
valve
control
inlet
control valve
consumer
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
EP19718099.5A
Other languages
German (de)
English (en)
Other versions
EP3759357C0 (fr
EP3759357B1 (fr
Inventor
Peter Bruck
Marcus Karl Pfeiffer
Christian Stauch
Philippe Vande Kerckhove
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.)
Hydac Mobilhydraulik GmbH
Original Assignee
Hydac Mobilhydraulik 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 Hydac Mobilhydraulik GmbH filed Critical Hydac Mobilhydraulik GmbH
Publication of EP3759357A1 publication Critical patent/EP3759357A1/fr
Application granted granted Critical
Publication of EP3759357C0 publication Critical patent/EP3759357C0/fr
Publication of EP3759357B1 publication Critical patent/EP3759357B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F15B11/02—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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • 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
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/31576—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 a single pressure source 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
    • F15B2211/40—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
    • F15B2211/42—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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • 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
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/6057—Load sensing circuits having valve means between output member and the load sensing circuit using directional control 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation

Definitions

  • the invention relates to a valve arrangement for pressure medium supply ei Nes hydraulic consumer, the connection has two working connections for Fluidver with the consumer and ver via various control valves added.
  • control concepts for such valve arrangements in particular load-sensing systems with upstream and downstream individual pressure weighers have distinguished themselves, which are also referred to in technical terms as LS or LUDV systems.
  • throttling controls in open-center circuits with constant or demand-adapted volume power supply have become established for certain applications.
  • a hydraulic valve arrangement for supplying pressure medium to a hydraulic consumer has already been proposed in WO 2016/091 528 A1, which has two working connections for connection to the consumer, with a first inlet control aperture, via which a first inlet flow from first of the working connections to the consumer is controllable, with a separate second return control diaphragm, via which a first return flow from the consumer via the second working port is controllable, and with a second to lauf horrblende, via which a second feed stream from the second Häan circuit towards the consumer controllable and a separate first return control orifice, via which a second return flow from the consumer via the first working connection can be controlled, wherein two separate pilot valves are provided, with the proviso that the first return control orifice for controlling the second back cklaufstroms on the first pilot valve is controllable and with the further proviso that the second inlet control diaphragm for controlling the second supply flow at the same time on the first pilot valve and the second pilot valve
  • DE 10 2012 006 21 9 A1 is based on a completely different control approach in that a consumer with two pressure chambers is actuated digitally hydraulically.
  • the digital hydraulic control arrangement used for this assigns at least one pressure chamber of the consumer to each designed as a switching valve inlet and outlet valve, by means of which a pressure chamber can be shut off or connected to a pressure medium source or with a pressure medium sink.
  • a control unit for controlling the inlet valve and the outlet valve such that a chamber pressure in this one or in another, further pressure chamber of the consumer or a desired consumer position by compression or decompression of the pressure medium in this other pressure chamber by supplying pressure or draining a pressure medium volume by means of the one pressure chamber associated inlet valve and outlet valve is adjustable.
  • the known control arrangement uses for this purpose fast-switching 2/2-way valves, which are preferably controllable using a balistic pulse width modulation (PWM). Also in such a way, the pressure medium supply of the hydraulic consumer can be carried out regularly in the form of a hydraulic working cylinder or hydraulic cylinder according to the so-called Meterlnn MeterOut- (MIMO) method in a digital manner.
  • MIMO Meterlnn MeterOut-
  • the present invention seeks to improve the known solutions to the effect that in a cost effective manner and space-saving and technically reliable Power losses in the operation of such valve arrangements for a Druckver supply of a hydraulic consumer are avoided.
  • valve assembly having the features of patent claim 1 and the valve arrangement for such a valve assembly inserted according to the feature configuration of the patent claim 1.
  • the valve arrangement according to the invention for supplying pressure medium of a hydraulic consumer, the two working connections for Fluidverbin tion with the consumer has a first control valve having a first inlet, via which a first feed stream from the first working port is controllable to the consumer, and with a first return control diaphragm , via which at the same time as the first inlet a first return flow from the consumer via the second working port is controllable, and a second inlet, via which a second feed flow from the second working port is controllable to the consumer, and with a second return control orifice, on the same time second inlet, a second return flow from the consumer via the first working port is controllable, and with a second control valve with an inlet control orifice, with which the respective inlet of the first control valve is controllable.
  • the inlet control diaphragm of the second control valve can be thoroughlybil det as an arbitrary means for narrowing the flow cross-section in the inlet, for example as a throttle.
  • valve spool of a control valve based on a particular consumer is designed for a defined operating point, for example, with the proviso that the valve assembly should be particularly suitable for so-called oppressive loads on the consumer, it comes with changing load ratio sen on Consumers, for example, in the context of constantly changing or pulling loads to a strong drain throttling, which in turn brings about high power losses.
  • This is avoided with the inventive valve assembly in a functionally reliable and instai ger way.
  • valve assembly according to the invention avoided the that when pulling loads in an inlet chamber of the hydraulic rule consumer cavitation arises, which in addition to malfunction long term can also lead to damage to the overall hydraulic system. If it comes to pressing loads on the consumer, is avoided with the valve assembly according to the invention that an unnecessary pressure drop at the so-called. Run-off edge of the control valve, since by the "resolved" control concept with at least two control valves connected in series, the pressure drop at the trailing edge of the Ven tils, upstream of the consumer is kept very low, so that no undesirable high pressure drop with a corresponding loss of power at the trailing edge of this control valve is formed .This has no equivalent in the prior art. In a particularly preferred embodiment of the invention Shen valve assembly of the first and / or the second inlet of the first control valve in each case free of funds for narrowing the flow cross-section, in particular blind or throttle free formed.
  • a third control valve preferably in the form of a pressure compensator, vorgese hen that is connected in a connection between a pressure supply for the valve assembly respectively for the connected hydraulic Ver consumer and the second control valve.
  • the third control valve is designed such that it controls in one of its positions with its inlet control orifice an inlet between the ge called pressure supply and the second control valve and blocks in another other position, this inlet.
  • the pressure difference is controlled at the subsequent two th control valve, so that a total of a Zulaufvolumenstromre gelung is realized, i. regardless of the load situation on consumer cher is always a defined inlet flow in the direction of the second control valve and thus adjustable to the hydraulic load.
  • the inlet control diaphragm of the third control valve may be formed as any means for narrowing the flow cross-section in the inlet, for example as a throttle.
  • the invention also provides first, second and third Steuerven tile for such valve arrangements according to the feature design of claim 1. 1
  • a resolved control edge concept for hyd raulischen consumers with low power dissipation Advantageous embodiments of the invention Ventilanord Regulation are the subject of the dependent claims 2 to 10.1m below, the valve arrangement according to the invention is explained in detail using aforementionedsbei game after the drawing. It shows in principle and not to scale representation, the only figure of the application in the manner of a hydraulic circuit diagram, the essential components of the valve assembly with their individual control valves and with an electronic control option (ECU).
  • ECU electronice control option
  • the valve arrangement shown in the figure is used to Druckstoffversor- supply of a hydraulic load 10, here in the form of a rule hydraulic ram whose piston rod unit 12 divides the cylinder into two working spaces, in the form of a piston chamber 14 and a rod space 1 6.
  • the piston chamber 14 is on a working port A and the rod space 1 6 connected to a working port B of the hydraulic valve assembly.
  • a hydraulic Häzy Linders can also occur another consumer, for example in the form of a hydraulic motor (not shown).
  • a pressure transducer 18 In the fluid connection between tween the working port A and the piston chamber 14 and the Ar beitsan gleich B and the rod space 16 is a pressure transducer 18 each connected, each of which delivers its measured value results to a central control or computer unit ECU (Electronic Control Unit) for further processing ,
  • ECU Electronic Control Unit
  • the valve arrangement has a first control valve 20, which controls in one of its valve positions 22, via a first inlet 24 a ers th inlet flow from the first working port A to the consumer 10. Further, in this valve position 22 by means of a first return run control orifice 26 simultaneously with the first inlet 24, a first return flow 28 from the consumer 10 via the second Häan circuit B in the direction of tank T out.
  • the first control valve 20 is shown in its closed Neutralstel ment 30 and with appropriate actuation of the first control valve 20, this valve in a further valve position 32 according to the left seen in the direction of the figure switching position can be brought.
  • the first control valve 20 has a second inlet 34, via which a second feed stream from the second working port B to the consumer 10 can be controlled. Further, a second return control orifice 36 is provided, via which a second return flow 38 from the consumer 10 via the first working port A to the tank T is simultaneously controllable with the second inlet 34.
  • the first and the second inlet 24, 34 of the first control valve are each case free of funds for narrowing the flow cross section, in particular special blind or throttle free formed.
  • valve arrangement has a second control valve 40, with an inlet control orifice 42 with which the respective inlet 24, 34 of the first control valve 20 can be controlled.
  • the first control valve 20 is an electromagnetically operable 4/4-way proportional valve, which in a fourth valve position 44 (shown on the far right) allows a floating position for the connected consumer 10, i. to compensate for a pendulum volume 44, the piston chamber 14 are directly connected to the rod space 1 6 in the fourth valve position, wherein from the side of the second control valve 40 further control fluid is trackable. A to the first control valve 20 on the input side connected return connection 46 with connection line 47 to the tank T is blocked. As the addressed
  • valve position 44 is not necessarily agile, the valve assembly according to the invention can also perform this function by means of an electromagnetically actuated 3/4-way proportional valve.
  • the first control valve 20 is, as usual and in the manner shown in the de-energized state held by means of two opposing compression springs in its neutral position 30. In the effective direction parallel to each respective compression spring engages on the valve on opposite STEU er devisen a proportional solenoid, each of the central STEU ervenez ECU controllable, that is energized, is.
  • the second control valve 40 is in turn formed from an electromagnetically operable 2/2-way proportional valve and in its actu th position, the inlet control panel 42 is activated. In its non-actuated position shown in the figure, however, a possible return flow originating from the first 24 and the second 34 inlet of the first control valve 20 is prevented, via a check valve 49 integrated in the second control valve 40, which in its closed position prevents the return there from the output of the second control valve 40 in the direction of its fluid input.
  • the blocking of the pertinent return means by means of
  • the second Steuerven valve 40 is energized held by a compression spring in its locked position shown and only with appropriate energization, triggered by the central control unit ECU, via the ge of the compression spring arranged proportional solenoid of the inlet via the inlet control panel 42 from the input side of second Steuerven tils 40 controlled to its output respectively regulated.
  • proportional magnet for the first or second control valve 20 or 40 can be, in particular at relatively large dimensions Fluid cross sections, particularly preferably use barometric pilot controls with pilot pressure regulators.
  • valve arrangement has a third control valve 50, preferably in the form of a pressure compensator, which is connected in a United bond between a pressure supply P and the second control valve 40.
  • the third control valve 50 is preferably designed as a 2/2-way pressure compensator and in its neutral position shown with its inlet control orifice 52, the feed between a pressure supply P and the second control valve 40 is controlled. In the other position of this pressure compensator 50 of the pending inlet is blocked.
  • a load sensing pressure LS which is taken from the connecting line 48 between the first 20 and the second 40 control valve.
  • a control pressure which is taken from a connecting line 54 between the second 40 and the third control valve 50. Consequently, the output of the third control valve 50 is connected via the line 54 to the input side of the second control valve 40 permanently fluid-carrying.
  • the load sensing pressure LS acts on the control side of the third valve 50, the pertinent attack is supported by a compression spring on the third control valve 50 with.
  • the originating from the connecting line 48 load sensing pressure LS can be passed via a connecting point 56 to further valve sections (not shown) if necessary notege.
  • the load-sensing pressure LS is at an interface point 58 of the valve unit 60, consisting of first, second and third control valve thit 20, 40 and 50 available.
  • the load-sensing pressure LS can be used to actuate a swivel-angle pump 62 serving for supplying pressure P, which in the present case, however, is finally electrically actuated by the central control unit ECU.
  • the control or computer unit ECU shown can, as provided with arrows, on the input side accept operating commands and output side even more, not shown valve sections with ansteu ern.
  • a third control valve 50 within the valve unit 60 which is interchangeable as a whole and also available as a retrofit kit, is designed in the manner of a pressure balance, and allows a total Zulaufvolumenstromre regulation for the consumer 10th

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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

L'invention concerne un système de soupape pour l'alimentation en fluide sous pression d'un utilisateur hydraulique, qui possède deux raccordements de travail (A, B) pour la liaison fluidique avec l'utilisateur, doté d'une première soupape de commande, qui comporte une première alimentation (24), sur laquelle un premier courant d'alimentation peut être commandé du premier raccordement de travail (A) vers l'utilisateur (10), et doté d'un premier écran de commande de retour (26), sur lequel en même temps avec la première alimentation (24) un premier courant de retour (28) de l'utilisateur (10) vers le deuxième raccordement de travail (B) peut être commandé, et comporte une deuxième alimentation (34), sur laquelle un deuxième courant d'alimentation du deuxième raccordement de travail (B) vers l'utilisateur (10) peut être commandé, et doté d'un deuxième écran de commande de retour (36), sur lequel en même temps avec la deuxième alimentation (34) un deuxième courant de retour (38) peut être commandé de l'utilisateur (10) sur le premier raccordement de travail (A), et doté d'une deuxième soupape de commande (40) ayant un écran de commande d'alimentation (42) permettant de commander l'alimentation respective (24, 34) de la première soupape de commande (20).
EP19718099.5A 2018-05-07 2019-04-09 Système de soupape pour l'alimentation en fluide sous pression d'un utilisateur hydraulique Active EP3759357B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018003728.3A DE102018003728A1 (de) 2018-05-07 2018-05-07 Ventilanordnung zur Druckmittelversorgung eines hydraulischen Verbrauchers
PCT/EP2019/058885 WO2019214887A1 (fr) 2018-05-07 2019-04-09 Système de soupape pour l'alimentation en fluide sous pression d'un utilisateur hydraulique

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CN112714831B (zh) * 2018-06-13 2023-07-14 派克汉尼汾(欧洲、中东和非洲)公司 液压阀装置
DE102021108081B4 (de) 2021-03-30 2023-02-02 Andreas Lupold Hydrotechnik Gmbh Vorrichtung zum Regeln einer Hydraulikpumpe oder eines Hydraulikmotors
DE102022111288A1 (de) 2022-05-06 2023-11-09 Jungheinrich Aktiengesellschaft Hydrauliksystem für ein Flurförderzeug und Flurförderzeug
EP4393867A1 (fr) * 2022-12-23 2024-07-03 CNH Industrial Italia S.p.A. Manipulateur télescopique

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JPH07127607A (ja) * 1993-09-07 1995-05-16 Yutani Heavy Ind Ltd 作業機械の油圧装置
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DE10138389A1 (de) * 2001-08-04 2003-02-20 Bosch Gmbh Robert Elektrohydraulische Einrichtung zur Steuerung eines doppelt wirkenden Motors
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DE102015209657A1 (de) * 2014-12-08 2016-06-23 Robert Bosch Gmbh Hydraulische Ventilanordnung, hydraulischer Ventilblock mit einer derartigen Ventilanordnung, und hydraulischer Antrieb damit
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WO2019214887A1 (fr) 2019-11-14
EP3759357C0 (fr) 2024-06-05
DE102018003728A1 (de) 2019-11-07
US20210062832A1 (en) 2021-03-04
EP3759357B1 (fr) 2024-06-05
US11168713B2 (en) 2021-11-09

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