EP0733743B1 - Dispositif pour une distribution du débit de fluide indépendante de la pression de charge des vannes de commande d'engins de chantier - Google Patents

Dispositif pour une distribution du débit de fluide indépendante de la pression de charge des vannes de commande d'engins de chantier Download PDF

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Publication number
EP0733743B1
EP0733743B1 EP96102897A EP96102897A EP0733743B1 EP 0733743 B1 EP0733743 B1 EP 0733743B1 EP 96102897 A EP96102897 A EP 96102897A EP 96102897 A EP96102897 A EP 96102897A EP 0733743 B1 EP0733743 B1 EP 0733743B1
Authority
EP
European Patent Office
Prior art keywords
duct
pressure
compensator
spring
running
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.)
Expired - Lifetime
Application number
EP96102897A
Other languages
German (de)
English (en)
Other versions
EP0733743A1 (fr
Inventor
Günther Brönner
Gustav Leidinger
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.)
CNH Industrial Baumaschinen GmbH
Original Assignee
O&K Orenstein and Koppel 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
Priority claimed from DE19520451A external-priority patent/DE19520451C1/de
Application filed by O&K Orenstein and Koppel GmbH filed Critical O&K Orenstein and Koppel GmbH
Publication of EP0733743A1 publication Critical patent/EP0733743A1/fr
Application granted granted Critical
Publication of EP0733743B1 publication Critical patent/EP0733743B1/fr
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
    • F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B2211/20—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
    • 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
    • F15B2211/3054—In combination with a pressure compensating valve the pressure compensating valve is arranged between directional control valve and 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
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in 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
    • F15B2211/60—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
    • 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
    • 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
    • F15B2211/78—Control of multiple output members

Definitions

  • a device for load flow independent flow distribution for a spool valve for mobile construction and work machines with at least two downstream consumers is operatively connected and by at least one controllable Delivery pump provided flow according to the load pressure independent Principle of correspondingly controllable piston-type compensators one or more the consumer makes available and the highest of those due to the consumer Press the regulator of the feed pump is reported, the compensators on the one hand a pressure chamber that can be connected to the respective consumer and, on the other hand, one Include spring space, the consumer can be connected to the spring space via corresponding channels are and in the connecting line at least one occupying two defined positions Closure element is used.
  • the single figure shows a schematic diagram of the schematic structure of a controller with a any number of consumers; in this example designed as a cylinder 1,2,3.
  • the Cylinders 1,2,3 are controlled by a spool valve, which works on the principle of flow pressure-independent flow distribution is built, of which only the control openings 4,5,6 are shown. These control openings 4, 5, 6 can be changed by the driver.
  • the compensator 10 designed as a piston, the slide section of which is assigned to the cylinder 1, is activated so that its oil flow can flow to this cylinder 1.
  • the cylinder pressure p z1 which has to serve as an LS signal, transports itself through transverse channels 11 in the compensator piston 10 by lifting the closure element 12, which is spherical here, via line 13, on which the other compensator pistons 14, 15 are also connected in parallel , to pump controller 8.
  • geometrically differently shaped closure elements, such as cones can also be used. This pressure acts via a longitudinally extending connecting channel 16 in the spring chamber 17.
  • the spherical closure elements 30, 31 are pressed onto their seats 28, 29 by the higher pressure p z1 controlled via the line 13 pressed so that oil flow from line 13 to cylinders 2 and 3 is prevented.
  • the spherical closure element 12 is lifted from its valve seat 32 as a result of the higher pressure prevailing in this compensator piston 10 and bears against a stop 33 of a closure element 34 inserted from above into the compensator piston 10, which at the same time guides the spring 18 in the spring chamber 17.
  • each compensator piston 10, 14, 15 is provided with channels 37, 38, 39 running in the longitudinal direction and in each case two channels 11, 41, 42, 43, 44, 45 running transversely thereto.
  • channels 16, 20, 21 are also incorporated in the longitudinal direction for connecting the cylinders 1, 2, 3 with the associated spring chamber 17, 22, 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Claims (9)

  1. Dispositif pour la répartition de débit indépendante de la pression de charge, dans le cas d'une vanne de commande, pour des machines de construction et des machines-outils mobiles, qui est liaison active avec au moins deux moyens de consommation (1, 2, 3) branchés en aval et qui met à disposition d'un ou de plusieurs des moyens de consommation (1, 2, 3) l'écoulement d'alimentation, mis à disposition par au moins une pompe d'alimentation (7) réglable, suivant le principe indépendant de la pression de charge, par l'intermédiaire de compensateurs (10, 14, 15) en genre de piston qui peuvent être commandés de façon conforme, et qui est averti par le moyen de réglage (8) de la pompe d'alimentation (7) de chaque fois la plus élevée des pressions présentes à l'endroit des moyens de consommation (1 ou 2 ou 3), dans lequel les compensateurs (10, 14, 15) comportent d'une part une chambre de pression (9, 24, 25) qui peut être raccordée au moyen de consommation (1, 2, 3) respectif et d'autre part une chambre de ressort (17, 22, 23), dans lequel les moyens de consommation peuvent être raccordés par des canaux (11,37, 16; 42, 38, 20; 44, 39, 21) correspondants à la chambre de ressort (17, 22, 23) et dans lequel au moins un élément de fermeture (12, 30, 31) qui ne peut occuper que deux positions déterminées (32, 33; 28, 35; 29, 36) est inséré dans la conduite de liaison (37, 16; 38, 20; 39, 21).
  2. Dispositif suivant la revendication 1, caractérisé en ce que l'élément de fermeture (12, 30, 31) est une bille.
  3. Dispositif suivant la revendication 1, caractérisé en ce que l'élément de fermeture présente une surface d'assise en forme de cône.
  4. Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que chaque compensateur (10, 14, 15) comporte au moins un canal (37, 16; 38, 20; 39, 21) s'étendant en direction longitudinale et au moins deux canaux (11, 41; 42, 43; 44, 45) qui s'étendent perpendiculairement à cela, le canal (37, 16; 38, 20; 39, 21) qui peut être fermé et qui s'étend en direction longitudinale reliant les moyens de consommation (1, 2, 3) et les chambres de ressort (17, 22, 23) respectives, un des canaux (11 ou 42 ou 44) qui s'étend transversalement transmettant, lors d'un déplacement d'un des compensateurs (10 ou 14 ou 15), le signal de pression qui convient ici au canal (37 ou 38 ou 39) s'étendant en direction longitudinale, et un autre canal (41 ou 43 ou 45) s'étendant transversalement transmet ce signal, par l'intermédiaire d'une conduite (13), d'une part aux chambres de ressort (22, 23 ou 17, 22 ou 17, 23) des autres compensateurs (14, 15; 10, 14; 10, 15) et d'autre part au moyen de réglage (8) de la pompe (7).
  5. Dispositif suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément de fermeture (12, 30, 31) est inséré entre les canaux (11, 41; 42, 43; 44, 45) qui s'étendent transversalement par rapport à la conduite longitudinale (37, 38, 39).
  6. Dispositif suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que l'élément de fermeture (12, 30, 31) peut être déplacé entre un siège de soupape (32, 28, 29) du côté de la chambre de cylindre et une butée (33, 35, 36) du côté de la chambre de ressort.
  7. Dispositif suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que la butée (33, 35, 36) est formée par un côté frontal d'un élément de fermeture (34, 46, 47) qui est inséré dans le compensateur (10, 14, 15) et qui sert simultanément de guidage pour le ressort (18).
  8. Dispositif suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le canal (16, 20, 21) qui conduit à la chambre de ressort (17, 22, 23) s'étend à travers l'élément de fermeture (34, 46, 47).
  9. Dispositif suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le canal qui conduit à la chambre de ressort (17, 22, 23) s'étend à l'intérieur de la paroi du compensateur (10, 14, 15).
EP96102897A 1995-03-24 1996-02-27 Dispositif pour une distribution du débit de fluide indépendante de la pression de charge des vannes de commande d'engins de chantier Expired - Lifetime EP0733743B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19510408 1995-03-24
DE19510408 1995-03-24
DE19520451 1995-06-03
DE19520451A DE19520451C1 (de) 1995-03-24 1995-06-03 Hydraulisches System

Publications (2)

Publication Number Publication Date
EP0733743A1 EP0733743A1 (fr) 1996-09-25
EP0733743B1 true EP0733743B1 (fr) 1999-06-30

Family

ID=26013593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96102897A Expired - Lifetime EP0733743B1 (fr) 1995-03-24 1996-02-27 Dispositif pour une distribution du débit de fluide indépendante de la pression de charge des vannes de commande d'engins de chantier

Country Status (2)

Country Link
EP (1) EP0733743B1 (fr)
AT (1) ATE181755T1 (fr)

Families Citing this family (2)

* 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
CN109869362B (zh) * 2019-01-31 2021-01-26 中国铁建重工集团股份有限公司 用于模拟凿岩负载的液压系统和凿岩负载的模拟测试方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69010419T2 (de) * 1989-02-20 1994-11-03 Hitachi Construction Machinery Co., Ltd., Tokio/Tokyo Hydraulische schaltung für maschinen.
WO1992001163A1 (fr) * 1990-07-05 1992-01-23 Hitachi Construction Machinery Co., Ltd. Systeme de commande hydraulique et agencement de soupapes associees
US5067389A (en) * 1990-08-30 1991-11-26 Caterpillar Inc. Load check and pressure compensating valve
JP2579202Y2 (ja) * 1992-04-10 1998-08-20 株式会社小松製作所 圧力補償弁を備えた操作弁

Also Published As

Publication number Publication date
ATE181755T1 (de) 1999-07-15
EP0733743A1 (fr) 1996-09-25

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