EP2871370B1 - Système de vannes - Google Patents

Système de vannes Download PDF

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Publication number
EP2871370B1
EP2871370B1 EP14185252.5A EP14185252A EP2871370B1 EP 2871370 B1 EP2871370 B1 EP 2871370B1 EP 14185252 A EP14185252 A EP 14185252A EP 2871370 B1 EP2871370 B1 EP 2871370B1
Authority
EP
European Patent Office
Prior art keywords
valve
load
pressure
pressure balance
line
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.)
Active
Application number
EP14185252.5A
Other languages
German (de)
English (en)
Other versions
EP2871370A1 (fr
Inventor
Jan Amrhein
Adrian Hirn
Steffen Knapper
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2871370A1 publication Critical patent/EP2871370A1/fr
Application granted granted Critical
Publication of EP2871370B1 publication Critical patent/EP2871370B1/fr
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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
    • 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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30555—Inlet and outlet of the pressure compensating valve being connected to the 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
    • F15B2211/60—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
    • 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
    • F15B2211/6052—Load sensing circuits having valve means between output member and the load sensing circuit using check valves

Definitions

  • the invention relates to a valve arrangement according to the preamble of patent claim 1 and a control arrangement with such valve arrangements.
  • a valve arrangement for controlling a consumer according to the concept of load-independent flow distribution is shown.
  • a pressure compensator downstream of a metering orifice.
  • a check valve is provided between an output of the pressure compensator and a load-sensing line.
  • valve assemblies eg as valve disks
  • load-sensing selection is also given without (known from the prior art) shuttle valves.
  • this solution can be retrofitted during commissioning or even later for individual consumers (for example, excavator functions).
  • the second connection line is a branched bridge line which connects the output of the pressure balance with two inputs of the main valve. So can be supplied via the main valve either one of two working ports of the valve assembly or the main valve.
  • the main valve and the pressure compensator are arranged in a common housing. Then, the pressure compensator valve body can be arranged perpendicular to the main spool.
  • the control arrangement can be designed as a valve block, in which the housings of the individual valve arrangements are designed as valve disks and abut each other.
  • a first throttle is arranged in front of or behind the check valve of each valve arrangement, and a second throttle is arranged between the superordinate load sensing line and a tank line of the control arrangement.
  • a flow control valve may be provided which comprises the second throttle.
  • An input element 8 connects an output port of a variable displacement pump 10 via pump ports P to the pump line 2.
  • the input element 8 further connects a tank T via tank ports T to the tank line 4.
  • a discharge channel 40 is provided between the outlet 29 of the pressure compensator 22 or the second connecting line 30 and the subordinate load-sensing line 35.
  • a biased by a spring check valve 42 and a throttle 44 are provided.
  • the opening direction of the check valve 42 is directed from the output 29 and from the second connecting line 30 to the load-sensing line 35.
  • the pressure compensator valve body 24 is approximately circular cylindrical and in this embodiment has an eccentrically a channel which forms the additional connection 39.
  • a cross-bore portion of the connection 39 is arranged such that at a maximum opening of the pressure compensator 22 of the first connection channel 28 and thus the input of the pressure compensator 22 is connected to the subordinate load-sensing line 35. This happens when the affected valve assembly 1 supplies the highest-load consumer. This is an option.
  • the check valve 42 is sufficient for the message of the LS signal.
  • the load pressure of the first connecting line 28 is reported in the load-sensing line 35, so that this load pressure as the highest load pressure of the entire control arrangement (see. FIG. 1 ) applies.

Landscapes

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

Claims (9)

  1. Ensemble soupape destiné à alimenter un consommateur hydraulique, comportant un obturateur de dosage (26) comprenant un tiroir principal (20) et comportant une balance de pression (22) reliée en aval de l'obturateur de dosage (26) par le biais d'une première conduite de liaison (28), balance de pression dont le corps de soupape (24) est sollicité, dans le sens d'ouverture, par la pression de la première conduite de liaison (28) et, dans le sens de fermeture, par la pression de charge d'une conduite de détection de charge (6, 35), une sortie (29) de la balance de pression (22) étant constamment reliée à la conduite de détection de charge (35) par le biais d'une soupape anti-retour (42), indépendamment de la position du corps de soupape de balance de pression (24), et un sens d'ouverture de la soupape anti-retour (42) étant orienté de la sortie de la balance de pression à la conduite de détection de charge (6, 35), caractérisé en ce que la soupape anti-retour (42) est disposée dans le corps de soupape de balance de pression (24), une liaison supplémentaire (39) de la première conduite de liaison (28) à la conduite de détection de charge (6, 35) étant commandée par le biais du corps de soupape de balance de pression (24) dans sa position d'ouverture maximale (38).
  2. Ensemble soupape selon la revendication 1, dans lequel le corps de soupape de balance de pression (24) est sollicité dans le sens de fermeture par le biais d'un ressort (36).
  3. Ensemble soupape selon la revendication 1, dans lequel la liaison (39) est formée par un alésage dans le corps de soupape de balance de pression (24) .
  4. Ensemble soupape selon l'une quelconque des revendications précédentes, dans lequel la sortie (29) de la balance de pression (22) est reliée, par le biais d'une deuxième conduite de liaison (30), à une entrée d'une soupape principale (18) comportant l'obturateur de dosage (26).
  5. Ensemble soupape selon la revendication 4, dans lequel la deuxième conduite de liaison (30) est une conduite formant pont qui relie la sortie (29) de la balance de pression (22) à deux entrées de la soupape principale (18).
  6. Ensemble soupape selon la revendication 4 ou 5, dans lequel la soupape principale (18) et la balance de pression (22) sont disposées dans un carter commun (50) .
  7. Ensemble de commande destiné à alimenter au moins deux consommateurs hydrauliques, comportant une pompe à cylindrée variable (10) et au moins deux ensembles soupapes (1) selon l'une quelconque des revendications précédentes, dont la conduite de détection de charge (35) respective est raccordée à une conduite de détection de charge primaire (6) dans laquelle agit la pression de charge la plus élevée des consommateurs.
  8. Ensemble de commande selon la revendication 7, dans lequel un premier étranglement (44) est disposé devant ou derrière la soupape anti-retour (42), et dans lequel un deuxième étranglement (16) est disposé entre la conduite de détection de charge primaire (6) et une conduite de réservoir (T).
  9. Ensemble de commande selon la revendication 8, comprenant une soupape de régulation de débit qui comporte le deuxième étranglement (16).
EP14185252.5A 2013-10-15 2014-09-18 Système de vannes Active EP2871370B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310220748 DE102013220748A1 (de) 2013-10-15 2013-10-15 Ventilanordnung

Publications (2)

Publication Number Publication Date
EP2871370A1 EP2871370A1 (fr) 2015-05-13
EP2871370B1 true EP2871370B1 (fr) 2019-02-27

Family

ID=51564528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14185252.5A Active EP2871370B1 (fr) 2013-10-15 2014-09-18 Système de vannes

Country Status (3)

Country Link
EP (1) EP2871370B1 (fr)
CN (1) CN104564875A (fr)
DE (1) DE102013220748A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3057309B1 (fr) * 2016-10-10 2018-11-16 Robert Bosch Gmbh Circuit hydraulique de commande multiple
DE102018204854A1 (de) * 2018-03-29 2019-10-02 Robert Bosch Gmbh Ventilanordnung mit einem Hauptschieber und zwei Steuerschiebern
DE102019120638A1 (de) * 2019-07-31 2021-02-04 Pöttinger Landtechnik Gmbh Landwirtschaftliche Maschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161373A (en) * 1990-06-22 1992-11-10 Zexel Corporation Hydraulic control valve system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689575B1 (fr) 1992-04-06 1994-07-08 Rexroth Sigma Distributeur hydraulique a compensation de pression et une selection de pression maximale pour piloter une pompe et commande hydraulique multiple incluant de tels distributeurs.
DE19831595B4 (de) * 1998-07-14 2007-02-01 Bosch Rexroth Aktiengesellschaft Hydraulische Schaltung
US7818966B2 (en) * 2008-01-09 2010-10-26 Husco International, Inc. Hydraulic control valve system with isolated pressure compensation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161373A (en) * 1990-06-22 1992-11-10 Zexel Corporation Hydraulic control valve system

Also Published As

Publication number Publication date
EP2871370A1 (fr) 2015-05-13
DE102013220748A1 (de) 2015-05-07
CN104564875A (zh) 2015-04-29

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