EP2772653A1 - 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 PDFInfo
- Publication number
- EP2772653A1 EP2772653A1 EP11873593.5A EP11873593A EP2772653A1 EP 2772653 A1 EP2772653 A1 EP 2772653A1 EP 11873593 A EP11873593 A EP 11873593A EP 2772653 A1 EP2772653 A1 EP 2772653A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control valve
- boom
- control
- flow path
- center bypass
- 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.)
- Withdrawn
Links
Images
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 an attachment driving control system for a construction machine. More particularly, the present invention relates to an attachment driving control system for a construction machine, in which in the case where two attachments having different operating pressures are simultaneously driven (e.g., the case where a boom for performing a boom descending operation and an attachment such as a bucket are simultaneously driven), a flow rate of a hydraulic fluid is controlled to enable the simultaneous use of a parallel flow path and a tandem flow path, leading to a reduction in a pressure loss occurring in the control valve.
- two attachments having different operating pressures e.g., the case where a boom for performing a boom descending operation and an attachment such as a bucket are simultaneously driven
- a flow rate of a hydraulic fluid is controlled to enable the simultaneous use of a parallel flow path and a tandem flow path, leading to a reduction in a pressure loss occurring in the control valve.
- a conventional boom driving control system for a construction machine in accordance with the prior art as shown in Fig. 1 includes:
- the boom control valve 14 is shifted to the right on the drawing sheet to cause the boom to descend, and thus the hydraulic fluid discharged from the second hydraulic pump 3 is supplied to the small chamber of the boom cylinder 13 via the boom control valve 14.
- the hydraulic fluid flowing out of the large chamber of the boom cylinder 13 returns to the hydraulic tank T via the boom control valve 14 and a back pressure check valve 23.
- the boom cylinder 13 can be driven in a retractable manner to cause the boom to descend.
- the back pressure check valve 23 is mounted with a valve spring so that when a hydraulic fluid passes therethrough, a constant pressure is formed.
- a regeneration line is installed in the back pressure check valve 23 so that the hydraulic fluid flowing out of the large chamber of the boom cylinder 13 can be regenerated to the small chamber of boom cylinder 13 along the regeneration line during the descending of the boom.
- a lower pressure acts on the boom due to the descending operation by its own weight.
- a throttle device is installed at a hydraulic fluid inlet side of a control spool (i.e., referring to the boom control valve 14) on a boom descending side so that simultaneous manipulability of the boom and the bucket can be maintained.
- a throttle device is installed in the parallel flow path of each attachment that is operated at a relatively low pressure to produce a pressure causing the boom to ascend so that simultaneous manipulability of the boom for performing a boom ascending operation and another attachment can be implemented.
- a tandem flow path is formed in the bucket control valve 16 and the traveling control valve 18 which are connected in parallel with the boom control valve 14 through the second center bypass path 12. That is, in the case where the drive of the bucket cylinder 15 is controlled alone, the hydraulic fluid from the second hydraulic pump 3 flows into the bucket control valve 16 through the parallel flow path 12a and the tandem flow path, thereby reducing an excessive pressure loss occurring when the hydraulic fluid from the second hydraulic pump 3 flows into the bucket control valve 16 through only the parallel flow path 12a.
- the second center bypass path 12 is blocked by the control spool on a boom descending side and the hydraulic fluid is supplied to the bucket cylinder 15 through only the parallel flow path 12a.
- a sufficient flow path cannot be secured by a priority control valve installed in the parallel flow path 12a, thereby inducing an excessive pressure loss, and thus causing an energy loss.
- variable control valve as a throttle valve 24 (see Fig. 2 ) may be installed in the parallel flow path 12a, but there is a limitation in securing the flow path using the throttle device.
- the present invention has been made to solve the aforementioned problem occurring in the prior art, and it is an object of the present invention to provide an attachment driving control system for a construction machine, in which in the case where two attachments having different operating pressures are simultaneously driven as in a boom descending operation and a bucket operation, a hydraulic fluid from the second hydraulic pump is allowed to flow into the bucket control valve through a parallel flow path and a tandem flow path, leading to a reduction in an unnecessary pressure loss occurring in the control valve, thereby reducing an energy loss and thus increasing an efficiency of a hydraulic system.
- an attachment driving control system for a construction machine in accordance with an embodiment of the present invention, including:
- the attachment is a bucket
- the control valve that controls the attachment is the bucket control valve
- the attachment driving control system for a construction machine in accordance with an embodiment of the present invention as constructed above has the following advantages.
- a hydraulic fluid from the second hydraulic pump is allowed to flow into the bucket control valve through the parallel flow path and the tandem flow path (i.e., in this case, a flow path can secured as much as a flow rate of the hydraulic fluid passing through the tandem flow path), leading to a reduction in a pressure loss occurring in the control valve, thereby reducing an energy loss.
- An attachment driving control system for a construction machine in accordance with an embodiment of the present invention as shown in Figs. 3 and 4 includes:
- a hydraulic fluid from the second hydraulic pump 3 flows into the bucket control valve 16 through the parallel flow path 12a and a tandem flow path connected to the second center bypass path 12 when a boom for performing a boom descending operation and an attachment (i.e., referring to a bucket) having an operating pressure relatively higher than that of the boom are simultaneously driven.
- the configuration of the attachment driving control system shown in Fig. 1 is the same as that of the attachment driving control system shown in Fig. 1 except the bleed flow path 25 that is formed on a control spool on a boom descending side of the boom control valve 14a and maintains the second center bypass path 12 in an opened state instead of blocking the second center bypass path 12 when the boom control valve 14a is shifted to descend the boom through the manipulation of the pressure generation device 19, and the center bypass shift valve 26 that is installed on the lowermost downstream side of the second center bypass path 12 and is shifted by a control signal pressure for shifting the boom control valve 14a.
- the same configuration and operation thereof will be omitted to avoid redundancy, and the same elements are denoted by the same reference numerals.
- the boom control valve 14a is shifted to the right on the drawing sheet in response to a pilot signal pressure from the pilot pump 4, which passes through the pressure generation device 19, by the manipulation of the pressure generation device 19.
- a hydraulic fluid discharged from the second hydraulic pump 3 is supplied to a small chamber of the boom cylinder 13 via a load check valve 22 and the boom control valve 14a.
- a hydraulic fluid flowing out of a large chamber of the boom cylinder 13 returns to a hydraulic tank T via the boom control valve 14a and a back pressure check valve 23.
- the boom cylinder 13 is driven in a retractable manner to cause the boom to descend.
- the hydraulic fluid flowing out of the large chamber of the boom cylinder 13 is partially regenerated to the small chamber of the boom cylinder 13 through a regeneration line formed on a control spool (i.e., referring to the boom control valve 14a) on a boom descending side.
- the hydraulic fluid discharged from the second hydraulic pump 3 is supplied to an inlet side of the bucket control valve 16 via the second center bypass path 12 and the bleed flow path 25 formed on a control spool on a boom descending side of the boom control valve 14a.
- the bleed flow path 25 is connected to a spool path of the bucket control valve 16 via a load check valve 27 of the bucket control valve 16.
- a hydraulic fluid passing through a priority control valve installed on a parallel flow path 12a joins a hydraulic fluid passing through the load check valve 27, and then flows into a spool of the bucket control valve 16.
- the attachment driving control system for a construction machine in accordance with an embodiment of the present invention is advantageous in that in the case where two attachments having different operating pressures are simultaneously driven as in a boom descending operation and a bucket operation, a hydraulic fluid from the second hydraulic pump is allowed to flow into the bucket control valve through the parallel flow path and the tandem flow path, leading to a reduction in a pressure loss occurring in the control valve, thereby increasing energy efficiency of the hydraulic system.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
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 (2)
Publication Number | Publication Date |
---|---|
EP2772653A1 true EP2772653A1 (fr) | 2014-09-03 |
EP2772653A4 EP2772653A4 (fr) | 2015-10-21 |
Family
ID=48043892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11873593.5A Withdrawn EP2772653A4 (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) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101861856B1 (ko) * | 2012-01-27 | 2018-05-28 | 두산인프라코어 주식회사 | 건설기계의 스윙 모터 유압제어장치 |
CN104919116B (zh) | 2013-01-18 | 2017-12-19 | 沃尔沃建造设备有限公司 | 用于工程机械的控流装置和控流方法 |
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 |
CN104179738B (zh) * | 2014-08-07 | 2016-04-13 | 龙工(上海)精工液压有限公司 | 一种滑移装载机开式液压系统 |
CN106715801A (zh) * | 2014-09-19 | 2017-05-24 | 沃尔沃建造设备有限公司 | 用于施工设备的液压回路 |
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 |
WO2016208780A1 (fr) * | 2015-06-22 | 2016-12-29 | 볼보 컨스트럭션 이큅먼트 에이비 | Circuit hydraulique pour engin de chantier |
JP7198072B2 (ja) * | 2018-12-13 | 2022-12-28 | キャタピラー エス エー アール エル | 建設機械の油圧制御回路 |
JP7221101B2 (ja) * | 2019-03-20 | 2023-02-13 | 日立建機株式会社 | 油圧ショベル |
JP7305532B2 (ja) * | 2019-12-28 | 2023-07-10 | 株式会社クボタ | 流量制御弁 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6129813Y2 (fr) * | 1980-07-07 | 1986-09-02 | ||
JPS57184136A (en) * | 1981-05-06 | 1982-11-12 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for oil-pressure working machine |
JP3061529B2 (ja) * | 1994-05-16 | 2000-07-10 | 日立建機株式会社 | ローダフロント付き油圧ショベルの油圧駆動装置 |
JPH07317713A (ja) * | 1994-05-27 | 1995-12-08 | Yutani Heavy Ind Ltd | 建設機械の油圧回路 |
JP3403538B2 (ja) * | 1995-03-03 | 2003-05-06 | 日立建機株式会社 | 建設機械の制御装置 |
JPH1182413A (ja) * | 1997-08-29 | 1999-03-26 | Komatsu Ltd | 作業機の油圧制御装置 |
JP3777114B2 (ja) * | 2001-11-05 | 2006-05-24 | 日立建機株式会社 | 油圧作業機の油圧回路装置 |
JP4279837B2 (ja) * | 2003-01-14 | 2009-06-17 | 日立建機株式会社 | 油圧作業機 |
JP2004324208A (ja) * | 2003-04-24 | 2004-11-18 | Hitachi Constr Mach Co Ltd | 掘削旋回作業機の油圧回路 |
US7178333B2 (en) * | 2004-03-18 | 2007-02-20 | Kobelco Construction Machinery Co., Ltd. | Hydraulic control system for hydraulic excavator |
CN100464036C (zh) * | 2005-03-28 | 2009-02-25 | 广西柳工机械股份有限公司 | 用于液压挖掘机工作装置的轨迹控制系统及方法 |
KR100974283B1 (ko) * | 2008-08-08 | 2010-08-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 굴삭 및 파이프 레잉 작업을 위한 유량 분배 시스템 |
KR101112133B1 (ko) * | 2009-06-16 | 2012-02-22 | 볼보 컨스트럭션 이큅먼트 에이비 | 플로트 기능을 갖는 건설장비용 유압시스템 |
KR101637575B1 (ko) * | 2009-12-24 | 2016-07-07 | 두산인프라코어 주식회사 | 건설기계의 유압제어장치 |
JP5079827B2 (ja) * | 2010-02-10 | 2012-11-21 | 日立建機株式会社 | 油圧ショベルの油圧駆動装置 |
-
2011
- 2011-10-07 EP EP11873593.5A patent/EP2772653A4/fr not_active Withdrawn
- 2011-10-07 US US14/348,686 patent/US20140238010A1/en not_active Abandoned
- 2011-10-07 JP JP2014534449A patent/JP5802338B2/ja not_active Expired - Fee Related
- 2011-10-07 CN CN201180073924.9A patent/CN103842663A/zh active Pending
- 2011-10-07 KR KR1020147007835A patent/KR20140074306A/ko not_active Application Discontinuation
- 2011-10-07 WO PCT/KR2011/007439 patent/WO2013051740A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20140238010A1 (en) | 2014-08-28 |
EP2772653A4 (fr) | 2015-10-21 |
JP2014534386A (ja) | 2014-12-18 |
JP5802338B2 (ja) | 2015-10-28 |
CN103842663A (zh) | 2014-06-04 |
WO2013051740A1 (fr) | 2013-04-11 |
KR20140074306A (ko) | 2014-06-17 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20140326 |
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