KR100939802B1 - 중장비용 유압회로 - Google Patents
중장비용 유압회로 Download PDFInfo
- Publication number
- KR100939802B1 KR100939802B1 KR1020070093981A KR20070093981A KR100939802B1 KR 100939802 B1 KR100939802 B1 KR 100939802B1 KR 1020070093981 A KR1020070093981 A KR 1020070093981A KR 20070093981 A KR20070093981 A KR 20070093981A KR 100939802 B1 KR100939802 B1 KR 100939802B1
- Authority
- KR
- South Korea
- Prior art keywords
- switching
- pilot signal
- hydraulic
- valve
- passage
- Prior art date
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Classifications
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- 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
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- 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
-
- 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
- F15B2211/20538—Type of pump constant 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/275—Control of the prime mover, e.g. hydraulic 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
-
- 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
- F15B2211/60—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
-
- 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
- F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
- F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
-
- 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
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
Claims (5)
- 엔진에 연결되는 제1,2,3,4유압펌프;상기 제1유압펌프의 유로에 설치되고, 절환시 붐을 포함하는 작업장치에 공급되는 작동유를 각각 제어하는 밸브들로 이루어지는 제1절환밸브;상기 제2유압펌프의 유로에 설치되고, 절환시 아암을 포함하는 작업장치에 공급되는 작동유를 각각 제어하는 밸브들로 이루어지는 제2절환밸브;상기 제3유압펌프의 유로에 설치되고, 절환시 선회장치에 공급되는 작동유를 각각 제어하는 밸브로 이루어지는 제3절환밸브;상기 제1,2,3절환밸브들의 절환유무를 감지할 수 있도록 상기 제1,2,3,절환밸브들을 통과하여 유압탱크에 연결되며, 상기 제4유압펌프의 파일럿 신호압 공급통로와 연통되는 파일럿 신호통로;상기 파일럿 신호통로에 신호압력을 형성하도록 설치되는 교축부; 및상기 교축부의 상류측 및 하류측에서 상기 파일럿 신호통로에 분기접속되는 병렬유로에 설치되며, 상기 파일럿 신호통로에 설정된 압력을 초과하는 신호압이 형성되는 경우, 상기 파일럿 신호통로의 신호압력을 상기 교축부보다 우선적으로 상기 신호압 공급통로로 공급하는 밸브를 포함하는 것을 특징으로 하는 중장비용 유압회로.
- 청구항 1에 있어서, 상기 밸브는 상기 파일럿 신호통로로부터 상기 신호압 공급통로로 신호압 이동을 허용하는 체크밸브가 사용되는 것을 특징으로 하는 중장 비용 유압회로.
- 엔진에 연결되는 제1,2,3,4유압펌프;상기 제1유압펌프의 유로에 설치되고, 절환시 붐을 포함하는 작업장치에 공급되는 작동유를 각각 제어하는 밸브들로 이루어지는 제1절환밸브;상기 제2유압펌프의 유로에 설치되고, 절환시 아암을 포함하는 작업장치에 공급되는 작동유를 각각 제어하는 밸브들로 이루어지는 제2절환밸브;상기 제3유압펌프의 유로에 설치되고, 절환시 선회장치에 공급되는 작동유를 각각 제어하는 밸브로 이루어지는 제3절환밸브;상기 제1,2,3절환밸브들의 절환유무를 감지할 수 있도록 상기 제1,2,3,절환밸브들을 통과하여 유압탱크에 연결되며, 상기 제4유압펌프의 파일럿 신호압 공급통로와 연통되는 파일럿 신호통로;상기 파일럿 신호통로에 신호압력을 형성하도록 설치되는 교축부; 및상기 파일럿 신호통로의 신호압력을 검출하도록 상기 파일럿 신호통로에 분기접속되는 신호압력 감지라인에 설치되고, 상기 파일럿 신호통로에 설정된 압력을 초과하는 신호압이 형성되는 경우 상기 파일럿 신호통로의 신호압력을 유압탱크로 배출시키는 밸브를 포함하는 것을 특징으로 하는 중장비용 유압회로.
- 청구항 3에 있어서, 상기 밸브는상기 파일럿 신호통로에 설정된 압력을 초과하는 신호압이 형성되는 경우, 내부 스풀이 절환되어 신호압력을 유압탱크로 드레인시키는 릴리프밸브가 사용되는 것을 특징으로 하는 중장비용 유압회로.
- 청구항 4에 있어서, 상기 릴리프밸브의 드레인 통로는 상기 절환밸브들이 설치되는 컨트롤밸브내의 포트와 별도의 외부 드레인포트에 연결되는 것을 특징으로 하는 중장비용 유압회로.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070093981A KR100939802B1 (ko) | 2007-09-17 | 2007-09-17 | 중장비용 유압회로 |
US12/206,775 US8104275B2 (en) | 2007-09-17 | 2008-09-09 | Hydraulic circuit for heavy equipment |
JP2008233089A JP5334509B2 (ja) | 2007-09-17 | 2008-09-11 | 建設機械用油圧回路 |
EP08016279.5A EP2039943B1 (en) | 2007-09-17 | 2008-09-16 | Hydraulic circuit for heavy equipment |
CN2008101496579A CN101392770B (zh) | 2007-09-17 | 2008-09-16 | 用于重型设备的液压回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070093981A KR100939802B1 (ko) | 2007-09-17 | 2007-09-17 | 중장비용 유압회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20090028874A KR20090028874A (ko) | 2009-03-20 |
KR100939802B1 true KR100939802B1 (ko) | 2010-02-02 |
Family
ID=40079557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020070093981A KR100939802B1 (ko) | 2007-09-17 | 2007-09-17 | 중장비용 유압회로 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8104275B2 (ko) |
EP (1) | EP2039943B1 (ko) |
JP (1) | JP5334509B2 (ko) |
KR (1) | KR100939802B1 (ko) |
CN (1) | CN101392770B (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011119945A1 (de) * | 2011-12-01 | 2013-06-06 | Liebherr-Hydraulikbagger Gmbh | Hydrauliksystem |
WO2016093378A1 (ko) * | 2014-12-08 | 2016-06-16 | 볼보 컨스트럭션 이큅먼트 에이비 | 건설기계용 유량 제어장치 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07167104A (ja) * | 1993-12-13 | 1995-07-04 | Hitachi Constr Mach Co Ltd | 可変容量型油圧ポンプ制御装置 |
KR20030004695A (ko) * | 2001-07-06 | 2003-01-15 | 대우종합기계 주식회사 | 굴삭기의 유압제어장치 |
KR20080088763A (ko) * | 2007-03-30 | 2008-10-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설중장비용 유압회로 |
Family Cites Families (17)
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US4067193A (en) * | 1976-11-22 | 1978-01-10 | Caterpillar Tractor Co. | Combined hydrostatic transmission implement system |
DE69221799T2 (de) * | 1991-04-15 | 1998-02-12 | Hitachi Construction Machinery | Hydraulisches steuersystem einer erdbaumaschine |
JPH0650309A (ja) * | 1992-08-03 | 1994-02-22 | Hitachi Constr Mach Co Ltd | 建設機械の油圧駆動装置 |
JPH10220401A (ja) * | 1997-02-03 | 1998-08-21 | Hitachi Constr Mach Co Ltd | ポンプ制御装置 |
JPH10219753A (ja) * | 1997-02-10 | 1998-08-18 | Kubota Corp | 建機のアクセル制御装置 |
JP3660501B2 (ja) * | 1998-05-28 | 2005-06-15 | 日立建機株式会社 | 建設機械のエンジン回転数制御装置 |
JP2001050209A (ja) * | 1999-08-10 | 2001-02-23 | Kayaba Ind Co Ltd | 建設車両用油圧回路 |
JP3659873B2 (ja) * | 2000-07-27 | 2005-06-15 | 株式会社クボタ | バックホウの油圧装置 |
JP4137431B2 (ja) * | 2001-11-09 | 2008-08-20 | ナブテスコ株式会社 | 油圧回路 |
JP3992612B2 (ja) * | 2002-12-26 | 2007-10-17 | 株式会社クボタ | バックホウの油圧回路構造 |
KR100518770B1 (ko) * | 2003-02-12 | 2005-10-05 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 중장비 옵션장치용 유압시스템 |
KR100527378B1 (ko) * | 2003-06-25 | 2005-11-09 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 붐합류용 스플을 이용한 중장비 옵션장치용 유압회로 |
JP4480565B2 (ja) * | 2004-12-10 | 2010-06-16 | 株式会社クボタ | バックホウの油圧回路構造 |
JP4266932B2 (ja) * | 2005-01-12 | 2009-05-27 | 日立建機株式会社 | 油圧駆動装置 |
JP2006329248A (ja) * | 2005-05-24 | 2006-12-07 | Kobelco Contstruction Machinery Ltd | 作業機械の油圧供給装置 |
JP4502890B2 (ja) * | 2005-06-30 | 2010-07-14 | 株式会社クボタ | バックホウの油圧回路構造 |
JP4302724B2 (ja) * | 2006-09-29 | 2009-07-29 | 株式会社クボタ | バックホーの油圧システム |
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2007
- 2007-09-17 KR KR1020070093981A patent/KR100939802B1/ko active IP Right Grant
-
2008
- 2008-09-09 US US12/206,775 patent/US8104275B2/en not_active Expired - Fee Related
- 2008-09-11 JP JP2008233089A patent/JP5334509B2/ja not_active Expired - Fee Related
- 2008-09-16 EP EP08016279.5A patent/EP2039943B1/en not_active Ceased
- 2008-09-16 CN CN2008101496579A patent/CN101392770B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07167104A (ja) * | 1993-12-13 | 1995-07-04 | Hitachi Constr Mach Co Ltd | 可変容量型油圧ポンプ制御装置 |
KR20030004695A (ko) * | 2001-07-06 | 2003-01-15 | 대우종합기계 주식회사 | 굴삭기의 유압제어장치 |
KR20080088763A (ko) * | 2007-03-30 | 2008-10-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설중장비용 유압회로 |
Also Published As
Publication number | Publication date |
---|---|
CN101392770B (zh) | 2013-07-10 |
EP2039943B1 (en) | 2013-07-03 |
JP5334509B2 (ja) | 2013-11-06 |
EP2039943A3 (en) | 2012-05-30 |
KR20090028874A (ko) | 2009-03-20 |
US8104275B2 (en) | 2012-01-31 |
EP2039943A2 (en) | 2009-03-25 |
US20090071141A1 (en) | 2009-03-19 |
JP2009068709A (ja) | 2009-04-02 |
CN101392770A (zh) | 2009-03-25 |
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