EP0733743B1 - Einrichtung zur lastdruckunabhängigen Durchflussverteilung bei einem Steuerschieber für mobile Bau- und Arbeitsmaschinen - Google Patents
Einrichtung zur lastdruckunabhängigen Durchflussverteilung bei einem Steuerschieber für mobile Bau- und Arbeitsmaschinen Download PDFInfo
- 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
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Images
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)
Description
- die Querschnitte in den Load-Sensing-Meldeleitungen 11,42,44 sowie die von den kugelförmigen Verschlußelementen 12,30,31 freigegebenen Querschnitte 37,38,39 können ohne nennenswerten Druckabfall den durch den Pumpenregler 8 und/oder durch die Entspannungsblende 48 in den Tank 49 abfließenden Ölstrom durchleiten.
- die Signalgabe ist absolut präzise und zuverlässig, da das kugelförmige Verschlußelement 12,30,31 lediglich zwei definierte Stellungen 32,33;28,35 sowie 29,36 (offen - geschlossen) aufweist und der LS-Strom nicht über Steuerkanten sich einregelnder Kolben abfließt.
- die Leitungsführung ist stark vereinfacht.
Claims (9)
- Einrichtung zur lastdruckunabhängigen Durchflußverteilung bei einem Steuerschieber für mobile Bau- und Arbeitsmaschinen, der mit mindestens zwei nachgeschalteten Verbrauchern (1,2,3) in Wirkverbindung steht und den durch mindestens eine regelbare Förderpumpe (7) zur Verfügung gestellten Förderstrom nach dem lastdruckunabhängigen Prinzip über entsprechend ansteuerbare kolbenartige Kompensatoren (10,14,15) einem oder mehreren der Verbraucher (1,2,3) zur Verfügung stellt und der jeweils höchste der an den Verbrauchern (1 oder 2 oder 3) anstehenden Drücke dem Regler (8) der Förderpumpe (7) gemeldet wird, wobei die Kompensatoren (10,14,15) einerseits einen mit dem jeweiligen Verbraucher (1,2,3) verbindbaren Druckraum (9,24,25) und andererseits einen Federraum (17,22,23) beinhalten, die Verbraucher über entsprechende Kanäle (11,37,18;42,38,20;44,39,21) mit dem Federraum (17,22,23) verbindbar sind und in die Verbindungsleitung (37,16;38,20;39,21) mindestens ein nur zwei definierte Stellungen (32,33;28,35;29,36) einnehmendes Verschlußelement (12,30,31) eingesetzt ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Verschlußelement (12,30,31) eine Kugel ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Verschlußelement eine kegelförmige Sitzfläche aufweist.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jeder Kompensator (10,14,15) mindestens einen (37,16;38,20;39,21) in Längsrichtung sowie mindestens zwei quer dazu verlaufende Kanäle (11,41 ;42,43;44,45)beinhaltet, wobei der in Längsrichtung verlaufende verschließbare Kanal (37,16;38,20;39,21) die Verbraucher (1,2,3) und die jeweiligen Federräume (17,22,23) miteinander verbindet, einer der quer verlaufenden Kanäle (11 oder 42 oder 44) bei Auslenkung eines der Kompensatoren (10 oder 14 oder 15) das hier anstehende Drucksignal an den in Längsrichtung verlaufenden Kanal (37 oder 38 oder 39) weiterleitet und ein weiterer quer verlaufender Kanal (41 oder 43 oder 45) dieses Signal über eine Leitung (13) einerseits an die Federräume (22,23 oder 17,22 oder 17,23) der weiteren Kompensatoren (14,15;10,14;10,15) und andererseits dem Regler (8) der Pumpe (7) übermittelt.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Verschlußelement (12,30,31) zwischen den quer zur Längsleitung (37,38,39) verlaufenden Kanälen (11,41;42,43;44,45) eingesetzt ist.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Verschlußelement (12,30,31) zwischen einem zylinderraumseitigen Ventilsitz (32,28,29) und einem federraumseitigen Anschlag (33,35,36) bewegbar ist.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Anschlag (33,35,36) durch eine Stirnseite eines in den Kompensator (10,14,15) eingesetzten Abschlußelementes (34,46,47) gebildet ist, das gleichzeitig als Führung für die Feder (18) dient.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der zum Federraum (17,22,23) führende Kanal (16,20,21) durch das Abschlußelement (34,46,47) verläuft.
- Einrichtung nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der zum Federraum (17,22,23) führende Kanal innerhalb der Wandung des Kompensators (10,14,15) verläuft.
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 (de) | 1996-09-25 |
EP0733743B1 true EP0733743B1 (de) | 1999-06-30 |
Family
ID=26013593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96102897A Expired - Lifetime EP0733743B1 (de) | 1995-03-24 | 1996-02-27 | Einrichtung zur lastdruckunabhängigen Durchflussverteilung bei einem Steuerschieber für mobile Bau- und Arbeitsmaschinen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0733743B1 (de) |
AT (1) | ATE181755T1 (de) |
Families Citing this family (2)
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)
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. |
DE69109250T2 (de) * | 1990-07-05 | 1995-09-21 | Hitachi Construction Machinery Co., Ltd., Tokio/Tokyo | Hydraulische antriebssystem und ventilanordnung. |
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 |
-
1996
- 1996-02-27 AT AT96102897T patent/ATE181755T1/de not_active IP Right Cessation
- 1996-02-27 EP EP96102897A patent/EP0733743B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE181755T1 (de) | 1999-07-15 |
EP0733743A1 (de) | 1996-09-25 |
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