WO2013022131A1 - Système de commande hydraulique pour engins de chantier - Google Patents

Système de commande hydraulique pour engins de chantier Download PDF

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Publication number
WO2013022131A1
WO2013022131A1 PCT/KR2011/005790 KR2011005790W WO2013022131A1 WO 2013022131 A1 WO2013022131 A1 WO 2013022131A1 KR 2011005790 W KR2011005790 W KR 2011005790W WO 2013022131 A1 WO2013022131 A1 WO 2013022131A1
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WO
WIPO (PCT)
Prior art keywords
arm
bucket
operating device
hydraulic pump
cylinder
Prior art date
Application number
PCT/KR2011/005790
Other languages
English (en)
Korean (ko)
Inventor
석옥진
이춘한
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
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 볼보 컨스트럭션 이큅먼트 에이비 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to CN201180072647.XA priority Critical patent/CN103717914B/zh
Priority to KR20147002787A priority patent/KR20140050030A/ko
Priority to PCT/KR2011/005790 priority patent/WO2013022131A1/fr
Priority to EP20110870643 priority patent/EP2743517A4/fr
Priority to JP2014524910A priority patent/JP5771332B2/ja
Priority to US14/235,182 priority patent/US20140158235A1/en
Publication of WO2013022131A1 publication Critical patent/WO2013022131A1/fr

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Classifications

    • 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
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
    • 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
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • 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
    • E02F9/2004—Control mechanisms, e.g. control levers
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • E02F9/2282—Systems using center bypass type changeover 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
    • E02F9/2285—Pilot-operated systems
    • 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
    • E02F9/2292—Systems with two or more pumps
    • 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
    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/70—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/85986—Pumped fluid control

Definitions

  • the present invention relates to a hydraulic control system of a construction machine, and more particularly, the hydraulic fluid from each hydraulic pump to the arm cylinder and the bucket cylinder during the combined operation to perform the excavation work by operating the arm operating device and the bucket operating device at the same time It relates to a hydraulic control system of a construction machine to supply and operate.
  • hydraulic pump A pair of variable displacement first and second hydraulic pumps 1 and 2 (hereinafter referred to as "hydraulic pump")
  • An arm joystick 4 and a bucket joystick (not shown) which respectively output control signals according to the amount of manipulation;
  • the first arm is installed in the flow path between the first hydraulic pump 1 and the arm cylinder 3, and controls the start, stop and direction change of the arm cylinder 3 at the time of switching according to the operation of the arm operating device 4.
  • Control valve (5)
  • a bucket control valve (not shown) is installed in the flow path between the second hydraulic pump 2 and the bucket cylinder (not shown), and controls the start, stop, and direction change of the bucket cylinder during switching according to the operation of the bucket operating device. ).
  • the first arm control valve (5) by the control signal according to the operation of the arm operating device (4) to drive the arm-in (arm-in)
  • the hydraulic oil discharged from the first hydraulic pump 1 is supplied to the large chamber 3a of the arm cylinder 3 via the switched first arm control valve 5.
  • the hydraulic oil returned from the small chamber 3b of the arm cylinder 3 is returned to the hydraulic tank T via the first arm control valve 5.
  • the bucket cylinder can be driven by the operating oil supplied from the second hydraulic pump 2 due to the operation of the bucket operating device.
  • the arm cylinder 3 can be driven by the working oil discharged from the first and second hydraulic pumps 1 and 2 and joined in the combined operation of simultaneously operating the arm and the bucket.
  • Embodiment of the present invention when operating the arm and the bucket at the same time during the excavation operation, the confluence function is released so that the arm cylinder and the bucket cylinder is driven by receiving hydraulic oil from their respective hydraulic pump to prevent the pressure loss of the hydraulic pump Related to the hydraulic control system of a construction machine.
  • Hydraulic control system of a construction machine according to an embodiment of the present invention
  • a bucket cylinder connected to the second hydraulic pump
  • An arm operating device and a bucket operating device for outputting a control signal according to the operation amount
  • a first arm control valve installed in a flow path between the first hydraulic pump and the arm cylinder, the first arm control valve controlling the start, stop and direction change of the arm cylinder at the time of switching according to the operation of the arm operating device;
  • the second arm is installed in the flow path between the second hydraulic pump and the arm cylinder, and is switched when the control signal according to the operation of the arm operating device exceeds the set value so that the discharge flow rate of the second hydraulic pump is joined to the arm cylinder and supplied.
  • Control valve
  • a bucket control valve installed in a flow path between the second hydraulic pump and the bucket cylinder and controlling the start, stop and direction change of the bucket cylinder during switching according to the operation of the bucket operating device;
  • Hydraulic control system of a construction machine according to an embodiment of the present invention
  • a variable displacement first and second hydraulic pumps an arm cylinder connected to the first hydraulic pump, a bucket cylinder connected to the second hydraulic pump, an arm operating device and a bucket operating device for outputting a control signal according to the operation amount;
  • a first arm control valve for controlling the hydraulic oil supplied to the arm cylinder according to the operation of the arm operating device, and the hydraulic oil supplied to the arm cylinder from the second hydraulic pump when the control signal according to the operation of the arm operating device exceeds the set value.
  • a second arm control valve for controlling the oil pressure, a bucket control valve for controlling the driving of the bucket cylinder according to the operation of the bucket operating device, and a flow rate of the second hydraulic pump when the arm cylinder is driven alone.
  • the hydraulic system including a confluence cancellation valve for closing the confluence function when the arm cylinder and the bucket cylinder are driven at the same time,
  • a first section in which the moving amount is gradually increased in proportion to the amount of operation of the arm operating device and the bucket operating device to release the joining function, and the control to maintain the joining interruption state as the operating amount of the arm operating device and the bucket operating device increases.
  • a third section in which the movement amount is gradually reduced in inverse proportion to the operation amount of the arm operating device and the bucket operating device to switch to the confluence function.
  • a solenoid valve that is switched in accordance with the input of the electrical signal to open and close the flow path may be used.
  • An electronic proportional control valve which is switched in accordance with the input of an electrical signal proportional to an operation signal of the arm operating device and the bucket operating device to open and close the flow path can be used.
  • Hydraulic control system of a construction machine according to an embodiment of the present invention configured as described above has the following advantages.
  • FIG. 1 is a hydraulic circuit diagram of a hydraulic control system of a construction machine according to the prior art
  • FIG. 2 is a hydraulic circuit diagram of a hydraulic control system of a construction machine according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing a control method of a hydraulic control system of a construction machine according to an embodiment of the present invention
  • Figure 4 is a graph for explaining the operation of the combined cancellation valve in the hydraulic control system of a construction machine according to an embodiment of the present invention.
  • variable displacement first and second hydraulic pumps 1 and 2 (hereinafter referred to as “hydraulic pumps")
  • the first arm is installed in the flow path between the first hydraulic pump 1 and the arm cylinder 3, and controls the start, stop and direction change of the arm cylinder 3 at the time of switching according to the operation of the arm operating device 4.
  • Control valve (5)
  • a bucket control valve (not shown) installed in a flow path between the second hydraulic pump 2 and the bucket cylinder and controlling the start, stop and direction change of the bucket cylinder during switching according to the operation of the bucket operating device;
  • Hydraulic control system of a construction machine according to an embodiment of the present invention
  • Variable displacement first and second hydraulic pumps (1 and 2), arm cylinders (3) connected to the first hydraulic pump (1), bucket cylinders (not shown) connected to the second hydraulic pump, and operation amount
  • the arm operating device 4 and the bucket operating device (not shown) for outputting a control signal according to the present invention, and the first arm control for controlling the hydraulic oil supplied to the arm cylinder 3 in accordance with the operation of the arm operating device 4.
  • the second arm control valve 6 for controlling the hydraulic oil supplied from the second hydraulic pump 2 to the arm cylinder 3 when the control signal according to the operation of the valve 5 and the arm operating device exceeds the set value.
  • a flow rate of the second hydraulic pump 2 when the arm cylinder 3 is driven alone and a bucket control valve (not shown) for controlling the operation of the bucket cylinder according to the operation of the bucket operating device.
  • the arm-in control signal and the bucket-in control signal exceed the set value Ap and the discharge pressure of the first and second hydraulic pumps 1 and 2 respectively exceed the set value Bp, the arm-in And a fourth step S400 of applying a control signal proportional to the control signal and the bucket-in control signal to the merge cancellation valve 8 to release the merge function.
  • a state (II) is provided.
  • the first section (controlled so that the movement amount is gradually increased in proportion to the operation amount of the arm operating device 4 and the bucket operating device, respectively) to release the joining function (referring to the second state (II) of the joining cancellation valve 8) ( a) and a second section (b) controlled to maintain the joining blocking state (referring to the first state (I) of the joining cancellation valve 8) in accordance with an increase in the operation amount of the arm operating device 4 and the bucket operating device.
  • a third section in which the moving amount is controlled to gradually decrease in inverse proportion to the operation amount of the arm operating device 4 and the bucket operating device for switching to the joining function (referring to the second state (II) of the joining cancellation valve 8). (c).
  • a solenoid valve which is switched in accordance with the input of the electrical signal to open and close the flow path 7 may be used.
  • An electronic proportional control valve that is switched in accordance with the input of an electrical signal proportional to the operation signal of the arm operating device 4 and the bucket operating device, to open and close the flow path 7 can be used.
  • the first arm control valve 5 is switched to the right in the drawing by the control signal according to the arm-in operation of the arm operating device 4 described above. Therefore, the hydraulic oil Q1 discharged from the first hydraulic pump 1 according to the operation amount of the arm operating device 4 passes through the large chamber 3a of the arm cylinder 3 via the switched first arm control valve 5. Is supplied. At this time, the hydraulic oil returned from the small chamber 3b of the arm cylinder 3 is returned to the hydraulic tank T via the first arm control valve 5.
  • the second arm control valve 6 is switched to the left in the drawing, so that the hydraulic oil Q2 discharged from the second hydraulic pump 2 Is supplied to the arm cylinder 2 in the large chamber 2a via the merging canceling valve 8 and the second arm control valve 6 in turn (that is, to the large chamber 3a of the arm cylinder 3).
  • the flow rate supplied is (Q1 + Q2).
  • the hydraulic oil Q2 supplied from the second hydraulic pump 2 joins and supplies the hydraulic oil Q1 supplied from the first hydraulic pump 1 to the arm cylinder 3. Therefore, the operating speed of the arm cylinder 3 can be increased (Q1 + Q2).
  • the bucket cylinder may be driven by the hydraulic oil supplied from the second hydraulic pump 2 due to the operation of the bucket operating device.
  • the electrical control signal (referring to the control signal for blocking the joining of the first and second hydraulic pumps 1 and 2) from the controller (not shown) to the joining cancellation valve 8 is provided. Is output.
  • the confluence cancellation valve 8 is switched downward in the drawing to block the flow path (referring to the supply side flow path between the second hydraulic pump 2 and the second arm control valve 6).
  • the hydraulic oil from the second hydraulic pump 2 is prevented from further joining the hydraulic oil of the first hydraulic pump 1. That is, the hydraulic oil from the first hydraulic pump 1 is supplied to the arm cylinder 3 via the first arm control valve 5, and at the same time the hydraulic oil from the second hydraulic pump 2 is a bucket control valve (not shown). Can be supplied to the bucket cylinder (in this case, the hydraulic oil supplied to the bucket cylinder is supplied without being interfered with the operation of the arm cylinder 3).
  • the arm-in control signal according to the operation amount of the arm operating device 4 the bucket-in control signal according to the operation amount of the bucket operating device, and the discharge of the first and second hydraulic pumps 1 and 2. Read each pressure.
  • the arm-in control signal and the bucket-in control signal described above exceed the set value Ap and the discharge pressures of the first and second hydraulic pumps 1 and 2 respectively set the set value Bp.
  • the arm-in control signal and the bucket-in control signal described above exceed the set value Ap and the discharge pressures of the first and second hydraulic pumps 1 and 2 respectively set the set value Bp.
  • the second hydraulic pump is switched from the controller to the merging canceling valve 8 in proportion to the arm-in control signal and the bucket-in control signal described above to switch to the first state (I).
  • the flow path 7 between the 2 and the second arm control valve 6 is blocked.
  • control signal (S) applied to the merge cancellation valve (8) is expressed by the following formula.
  • S (arm-in manipulated amount ⁇ C) and (bucket-in manipulated amount ⁇ D).
  • C and D are constants predetermined to be applied to the selected work according to various working conditions of the excavation work.
  • the above-described joining canceling valve 8 includes a first section a in which the moving amount is controlled to gradually increase in proportion to the operating amounts of the arm operating device 4 and the bucket operating device, respectively, in order to release the joining function. ), A second section (b) which is controlled to maintain the joining blocking state as the operation amount of the arm operating device 4 and the bucket operating device increases, and the arm operating device 4 and the bucket operating device to switch to the joining function.
  • the third section (c) is controlled so that the moving amount is gradually reduced in inverse proportion to the operation amount of.
  • the hydraulic oil from the first hydraulic pump 1 is transferred to the large chamber 3a of the arm cylinder 3 via the first arm control valve 5.
  • the hydraulic oil from the second hydraulic pump 2 can be supplied to the large chamber of the bucket cylinder via the bucket control valve.
  • the hydraulic control system of the construction machine can be used for an excavator or a loader, and when operating the arm and the bucket at the same time for excavation work, the hydraulic oil from the respective hydraulic pump to the arm cylinder and the bucket cylinder It is possible to increase the fuel efficiency by preventing the pressure loss of the hydraulic pump by supplying.

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

Abstract

La présente invention concerne un système de commande hydraulique pour engins de chantier, capable de fournir un fluide de travail en provenance d'une pompe hydraulique à la fois à un vérin de bras et à un vérin de godet et d'actionner ceux-ci, pendant la réalisation d'une opération complexe telle qu'une excavation, en actionnant simultanément un dispositif de manœuvre du bras et un dispositif de manœuvre du godet. Le système de commande hydraulique comporte : une première vanne de commande de bras installée sur un passage entre une première pompe hydraulique et le vérin de bras, servant à commander l'actionnement, l'arrêt et l'inversion de sens du vérin de bras lorsque la première vanne de commande de bras est commutée en fonction d'une manipulation du dispositif de manœuvre du bras ; une deuxième vanne de commande de bras installée sur un passage entre une deuxième pompe hydraulique et le vérin de bras, en vue d'être commutée pour raccorder et fournir un écoulement refoulé en provenance de la deuxième pompe hydraulique au vérin de bras lorsqu'un signal de commande dépendant d'une manipulation du dispositif de manœuvre du bras dépasse une valeur spécifiée ; une vanne de commande de godet installée sur un passage entre la deuxième pompe hydraulique et le vérin de godet, servant à commander l'actionnement, l'arrêt et l'inversion de sens du vérin de godet lorsque la vanne de commande de godet est commutée en fonction d'une manipulation du dispositif de manœuvre du godet ; et une vanne d'annulation de jonction installée sur un passage entre la deuxième pompe hydraulique et la deuxième vanne de commande de bras.
PCT/KR2011/005790 2011-08-09 2011-08-09 Système de commande hydraulique pour engins de chantier WO2013022131A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201180072647.XA CN103717914B (zh) 2011-08-09 2011-08-09 用于施工机械的液压控制***
KR20147002787A KR20140050030A (ko) 2011-08-09 2011-08-09 건설기계의 유압 제어시스템
PCT/KR2011/005790 WO2013022131A1 (fr) 2011-08-09 2011-08-09 Système de commande hydraulique pour engins de chantier
EP20110870643 EP2743517A4 (fr) 2011-08-09 2011-08-09 Système de commande hydraulique pour engins de chantier
JP2014524910A JP5771332B2 (ja) 2011-08-09 2011-08-09 建設機械の油圧制御システム
US14/235,182 US20140158235A1 (en) 2011-08-09 2011-08-09 Hydraulic control system for construction machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/005790 WO2013022131A1 (fr) 2011-08-09 2011-08-09 Système de commande hydraulique pour engins de chantier

Publications (1)

Publication Number Publication Date
WO2013022131A1 true WO2013022131A1 (fr) 2013-02-14

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Application Number Title Priority Date Filing Date
PCT/KR2011/005790 WO2013022131A1 (fr) 2011-08-09 2011-08-09 Système de commande hydraulique pour engins de chantier

Country Status (6)

Country Link
US (1) US20140158235A1 (fr)
EP (1) EP2743517A4 (fr)
JP (1) JP5771332B2 (fr)
KR (1) KR20140050030A (fr)
CN (1) CN103717914B (fr)
WO (1) WO2013022131A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR20150005752A (ko) * 2013-07-04 2015-01-15 현대중공업 주식회사 플로팅 기능을 가지는 붐 합류용 유압회로

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* Cited by examiner, † Cited by third party
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US9187879B2 (en) 2012-01-02 2015-11-17 Volvo Construction Equipment Ab Method for controlling operation of dump for construction machinery
KR101770732B1 (ko) 2012-06-04 2017-08-23 볼보 컨스트럭션 이큅먼트 에이비 건설기계의 주행 제어방법
DE112013006501T5 (de) 2013-01-24 2016-03-31 Volvo Construction Equipment Ab Vorrichtung und Verfahren zum Steuern einer Flussrate bei Baumaschinen
JP5975073B2 (ja) * 2014-07-30 2016-08-23 コベルコ建機株式会社 建設機械
GB2582227B (en) 2016-01-08 2021-04-21 Cummins Inc Communication interface for start-stop systems and methods
KR102123481B1 (ko) 2016-09-21 2020-06-16 가부시키가이샤 고마쓰 세이사쿠쇼 작업 차량 및 유압 제어 방법
EP4155556A1 (fr) * 2017-12-14 2023-03-29 Volvo Construction Equipment AB Machine hydraulique
CN110861225A (zh) * 2019-11-26 2020-03-06 中铁十一局集团第二工程有限公司 隧道衬砌的切割方法
CN111501893A (zh) * 2020-04-30 2020-08-07 徐州徐工挖掘机械有限公司 负流量液压***和挖掘机

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JP5771332B2 (ja) 2015-08-26
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EP2743517A1 (fr) 2014-06-18
CN103717914A (zh) 2014-04-09

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