WO2013051740A1 - Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction - Google Patents

Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction Download PDF

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Publication number
WO2013051740A1
WO2013051740A1 PCT/KR2011/007439 KR2011007439W WO2013051740A1 WO 2013051740 A1 WO2013051740 A1 WO 2013051740A1 KR 2011007439 W KR2011007439 W KR 2011007439W WO 2013051740 A1 WO2013051740 A1 WO 2013051740A1
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WO
WIPO (PCT)
Prior art keywords
control valve
boom
control
center bypass
valve
Prior art date
Application number
PCT/KR2011/007439
Other languages
English (en)
Korean (ko)
Inventor
정해균
송영복
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 US14/348,686 priority Critical patent/US20140238010A1/en
Priority to PCT/KR2011/007439 priority patent/WO2013051740A1/fr
Priority to CN201180073924.9A priority patent/CN103842663A/zh
Priority to EP11873593.5A priority patent/EP2772653A4/fr
Priority to KR1020147007835A priority patent/KR20140074306A/ko
Priority to JP2014534449A priority patent/JP5802338B2/ja
Publication of WO2013051740A1 publication Critical patent/WO2013051740A1/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
    • 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
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/123—Drives or control devices specially adapted therefor
    • 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
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • E02F9/2264—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
    • E02F9/2285—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
    • 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
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3133—Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke

Definitions

  • the present invention relates to a work machine drive control system for a construction machine, and more particularly, when operating a work device having a different operating pressure at the same time (for example, to drive a work device such as a boom down operation of an excavator and a bucket, etc. simultaneously.
  • the present invention relates to a drive system control system for a construction machine that reduces pressure loss inside a control valve by controlling a flow rate so that a parallel passage and a tandem passage can be used at the same time.
  • the engine 1 The engine 1,
  • first and second hydraulic pumps 2 and 3 A variable displacement first and second hydraulic pumps 2 and 3 (hereinafter referred to as "first and second hydraulic pumps") and a pilot pump 4 connected to the engine 1,
  • a swing control valve (7) installed in the first center bypass passage (5) of the first hydraulic pump (2) and connected to a parallel channel (5a), respectively, to control the driving of the swing motor (6);
  • a boom control valve 14 and a bucket cylinder which are installed in the second center bypass passage 12 of the second hydraulic pump 3 and connected to the parallel passage 12a, respectively, and control the driving of the boom cylinder 13; 15) a bucket control valve 16 for controlling the drive, a travel control valve 18 for controlling the drive of the right traveling motor 17,
  • the pilot signal pressure from the pilot pump 4 is supplied to the boom control valve 14 via the pressure generator 19.
  • the boom control valve 14 is switched to the boom up position (switched to the left in the drawing)
  • the hydraulic oil discharged from the second hydraulic pump 3 is loaded with the load check valve 22 and the boom control valve 14. It is supplied to the large chamber of the boom cylinder 13 via).
  • the hydraulic oil flowing out of the small chamber of the boom cylinder 13 is returned to the hydraulic tank T via the boom control valve 14. Therefore, the boom cylinder 13 is extended and driven so that the boom can be raised.
  • the pilot signal pressure from the pilot pump 4 is shown through the pressure generator 19 to the boom control valve 14. Switch to up or right direction. Therefore, the hydraulic oil discharged from the second hydraulic pump 3 is supplied to the small chamber of the boom cylinder 13 via the boom control valve 14. At the same time, the hydraulic oil flowing out of the large chamber of the boom cylinder 13 is returned to the hydraulic tank T via the boom control valve 14 and the back pressure check valve 23. Therefore, the boom cylinder 13 is contracted and driven so that the boom can be lowered.
  • a tandem passage is formed in the bucket control valve 16 and the traveling control valve 18 connected in parallel with the above-described boom control valve 14 through the second center bypass passage 12. That is, when controlling the operation of the bucket cylinder 15 alone, the hydraulic oil from the second hydraulic pump 3 is introduced through the parallel passage 12a and the tandem passage, so that the excessively generated when passing only through the parallel passage 12a. Pressure loss can be reduced.
  • the second center bypass passage 12 is closed by the boom lowering control spool to supply hydraulic oil to the bucket cylinder 15.
  • the passage is provided only through the parallel passage 12a. In this case, a sufficient flow path cannot be secured by the wired control valve installed in the parallel flow path 12a, causing excessive pressure loss, thereby causing energy loss.
  • variable control valve (refer FIG. 2) may be provided as the throttling device 24 of the parallel flow path 12a mentioned above, such a throttling device also has a limitation in ensuring sufficient flow path.
  • the operating oil when operating a work device having a different operating pressure at the same time as in a boom-down operation and a bucket drive, the operating oil is introduced into the bucket control valve through the parallel flow path and the tandem flow path to be generated inside the control valve. It is associated with a work machine drive control system for construction machinery that reduces energy loss by reducing unnecessary pressure losses, thereby increasing hydraulic system efficiency.
  • a swing control valve installed in the first center bypass passage of the first hydraulic pump and connected to the parallel flow path, respectively, to control the swing motor, an arm control valve to control the arm cylinder, and a travel control valve to control the left travel motor.
  • a pressure generator for outputting a control signal corresponding to the manipulated variable
  • a center bypass switching valve installed at the downstreammost side of the second center bypass passage and switched by a control signal pressure for switching the boom control valve
  • the working oil from the second hydraulic pump is introduced into the control valve through the parallel channel and the tandem channel connected to the second center bypass passage.
  • the work device described above is a bucket and the control valve controlling the work device is a bucket control valve.
  • Construction device work control device drive control system according to an embodiment of the present invention configured as described above has the following advantages.
  • the hydraulic fluid is introduced into the bucket control valve through the parallel and tandem flow paths (the flow rate as the flow rate passes along the tandem flow path).
  • the energy loss can be reduced by reducing the pressure loss generated inside the control valve.
  • FIG. 1 is a hydraulic circuit diagram of a control device driving control system for a construction machine according to the prior art
  • Figure 2 is an enlarged view of the main portion extract of the priority control valve applied to the work machine drive control system for construction machinery according to the prior art
  • FIG. 3 is a hydraulic circuit diagram of a control system for driving a work device for a construction machine according to an embodiment of the present invention
  • Figure 4 is an enlarged view of the main portion of the priority control valve in the construction machine work device drive control system according to an embodiment of the present invention.
  • 3 to 4 is a work machine driving control system for a construction machine according to an embodiment of the present invention
  • the engine 1 The engine 1,
  • first and second hydraulic pumps (hereinafter referred to as “first and second hydraulic pumps “ and pilot pumps 4) connected to the engine 1,
  • a swing control valve 7 installed in the first center bypass passage 5 of the first hydraulic pump 2 and connected to the parallel flow passage 5a to control the driving of the swing motor 6, and an arm cylinder ( 8) an arm control valve 9 for controlling driving, a travel control valve 11 for controlling driving of the left traveling motor 10,
  • a boom control valve 14a installed in the second center bypass passage 12 of the second hydraulic pump 3 and connected to the parallel passage 12a to control the boom cylinder 13 driving, and a bucket cylinder ( 15) a bucket control valve 16 for controlling the drive, a travel control valve 18 for controlling the drive of the right traveling motor 17,
  • Pressure generators 19 and 20 for outputting a control signal corresponding to the manipulated variable
  • the second center bypass passage 12 is formed in the boom lower side control spool of the boom control valve 14a and also when the boom control valve 14a is switched so that the boom is turned down by the operation of the pressure generator 19.
  • a bleed flow path 25 which is kept open without blocking;
  • a center bypass switching valve 26 is provided on the downstream side of the second center bypass passage 12 and is switched by a control signal pressure for switching the boom control valve 14a.
  • the boom control valve 14a is switched to the right direction on the drawing via. Therefore, the hydraulic oil discharged from the second hydraulic pump 3 is supplied to the small chamber of the boom cylinder 13 via the rod check valve 22 and the boom control valve 14a. At the same time, the hydraulic oil flowing out of the large chamber of the boom cylinder 13 is returned to the hydraulic tank T via the boom control valve 14a and the back pressure check valve 23. Therefore, the boom cylinder 13 is contracted and driven so that the boom can be lowered.
  • the hydraulic oil discharged from the second hydraulic pump 3 passes through the bleed flow path 25 formed in the boom lower side control spool of the second center bypass passage 12-boom control valve 14a, and passes through the bucket control valve. It is supplied to the inlet side of 16. Therefore, the rod check valve 27 of the bucket control valve 16 is connected to the spool passage of the bucket control valve 16.
  • the flow rate via the priority control valve installed in the parallel flow path 12a joins with the flow rate through the load check valve 27 and flows into the spool of the bucket control valve 16.
  • the flow rate from the second hydraulic pump 3 flows into the spool of the bucket control valve 16 through the parallel flow passage 12a.
  • the flow rate from the second hydraulic pump 3 flows into the spool of the bucket control valve 16 also through the second center bypass passage 12.
  • the pressure loss is reduced by the flow rate flowing through the second center bypass passage 12 to the spool of the bucket control valve 16 (This pressure loss reduction may be equally applied to the travel control valve 18. ).

Abstract

La présente invention se rapporte à un système de commande destiné à réguler un flux de sorte à permettre un usage simultané d'un circuit parallèle et d'un circuit en tandem de sorte à réduire la perte de pression dans une vanne de commande lorsque des dispositifs de travail qui présentent des pressions de fonctionnement différentes, travaillent en même temps. Un système de commande pour faire fonctionner le dispositif de travail selon la présente invention utilise le système de commande pour faire fonctionner un dispositif de travail d'une machine de construction, ledit système de commande comprenant : des première et seconde pompes hydrauliques qui sont raccordées à un moteur ; une vanne de commande de révolution, une vanne de commande de bras et une vanne de commande d'entraînement vers la gauche, qui sont installées sur un premier circuit de dérivation central de la première pompe hydraulique et qui sont chacune raccordées par l'intermédiaire du circuit parallèle ; une vanne de commande de flèche, une vanne de commande de godet et une vanne d'entraînement vers la droite qui sont installées sur un second circuit de dérivation central de la seconde pompe hydraulique et qui sont chacune raccordées par l'intermédiaire du circuit parallèle ; un dispositif de génération de pression ; un circuit de purge qui est formé sur un tiroir de commande agencé au niveau d'un côté inférieur d'une flèche de la vanne commande de flèche, pour maintenir un état ouvert du second circuit central sans fermer ce dernier lorsque la vanne de commande de flèche est commutée de sorte à abaisser la flèche ; et une vanne de commutateur de dérivation centrale qui est installée sur le côté le plus bas du second circuit de dérivation central et est commutée au moyen d'un signal de commande pour commuter la vanne de commande de flèche.
PCT/KR2011/007439 2011-10-07 2011-10-07 Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction WO2013051740A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US14/348,686 US20140238010A1 (en) 2011-10-07 2011-10-07 Control system for operating work device for construction machine
PCT/KR2011/007439 WO2013051740A1 (fr) 2011-10-07 2011-10-07 Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction
CN201180073924.9A CN103842663A (zh) 2011-10-07 2011-10-07 用于施工机械的操作工作装置的控制系统
EP11873593.5A EP2772653A4 (fr) 2011-10-07 2011-10-07 Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction
KR1020147007835A KR20140074306A (ko) 2011-10-07 2011-10-07 건설기계용 작업장치 구동 제어시스템
JP2014534449A JP5802338B2 (ja) 2011-10-07 2011-10-07 建設機械用作業装置の駆動制御システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/007439 WO2013051740A1 (fr) 2011-10-07 2011-10-07 Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction

Publications (1)

Publication Number Publication Date
WO2013051740A1 true WO2013051740A1 (fr) 2013-04-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/007439 WO2013051740A1 (fr) 2011-10-07 2011-10-07 Système de commande pour faire fonctionner un dispositif de travail d'une machine de construction

Country Status (6)

Country Link
US (1) US20140238010A1 (fr)
EP (1) EP2772653A4 (fr)
JP (1) JP5802338B2 (fr)
KR (1) KR20140074306A (fr)
CN (1) CN103842663A (fr)
WO (1) WO2013051740A1 (fr)

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EP2947211B1 (fr) 2013-01-18 2018-09-26 Volvo Construction Equipment AB Dispositif de régulation de flux et procédé de régulation de flux de machine de construction
CN104981615B (zh) 2013-02-19 2017-11-10 沃尔沃建造设备有限公司 用于设置有保护装置的工程机械的液压系统
KR20160023710A (ko) 2013-06-28 2016-03-03 볼보 컨스트럭션 이큅먼트 에이비 플로팅기능을 갖는 건설기계용 유압회로 및 플로팅기능 제어방법
EP3026181B1 (fr) * 2013-07-24 2018-11-14 Volvo Construction Equipment AB Circuit hydraulique pour engin de chantier
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US20170276151A1 (en) * 2014-09-19 2017-09-28 Volvo Construction Equipment Ab Hydraulic circuit for construction equipment
WO2016098926A1 (fr) * 2014-12-17 2016-06-23 볼보 컨스트럭션 이큅먼트 에이비 Procédé de commande pour entraîner un actionneur hydraulique d'un engin de chantier
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KR20140074306A (ko) 2014-06-17
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CN103842663A (zh) 2014-06-04
EP2772653A4 (fr) 2015-10-21
US20140238010A1 (en) 2014-08-28

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