EP0279362A1 - Hydraulisches System - Google Patents
Hydraulisches System Download PDFInfo
- Publication number
- EP0279362A1 EP0279362A1 EP88102046A EP88102046A EP0279362A1 EP 0279362 A1 EP0279362 A1 EP 0279362A1 EP 88102046 A EP88102046 A EP 88102046A EP 88102046 A EP88102046 A EP 88102046A EP 0279362 A1 EP0279362 A1 EP 0279362A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- motors
- compensating valve
- valve assembly
- pump
- 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.)
- Granted
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
- E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
- F15B11/0445—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out" with counterbalance valves, e.g. to prevent overrunning or for braking
-
- 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
-
- 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
- F15B11/22—Synchronisation of the movement of two or more servomotors
-
- 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
- F15B13/022—Flow-dividers; Priority 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
- F15B2211/30—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
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple 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
- F15B2211/50—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
- F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back 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
- F15B2211/60—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
- F15B2211/70—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
- F15B2211/7058—Rotary output members
-
- 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
- F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators
Definitions
- the compensator valve assembly associated with the later opening directional control valve becomes dominated by the earlier opening and now high pressure compensator valve assembly, and tends to reduce flow to the hydraulic motor with which it is associated. Therefore, the hydraulic motor associated with the first opening directional control valve moves faster than the motor associated with the later opening directional control valve resulting in a turning movement by the crawler.
- the present invention overcomes or reduces this problem.
- communication line 100 would prevent either compensating valve assembly 32 or 36 from dominating one another.
- exhaust lines 84 and 102 even though coupled through line 98, would not affect operation of the compensating valve assemblies.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1631887A | 1987-02-19 | 1987-02-19 | |
US16318 | 1987-02-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0279362A1 true EP0279362A1 (de) | 1988-08-24 |
EP0279362B1 EP0279362B1 (de) | 1990-12-05 |
Family
ID=21776536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880102046 Expired EP0279362B1 (de) | 1987-02-19 | 1988-02-12 | Hydraulisches System |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0279362B1 (de) |
JP (1) | JP2604399B2 (de) |
CA (1) | CA1274748A (de) |
DE (1) | DE3861194D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1338802A2 (de) * | 2002-02-26 | 2003-08-27 | Husco International, Inc. | Hydraulische Steuereinrichtung zum Betreiben von zwei parallel angeordneten Aktuatoren |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0433454B1 (de) * | 1989-05-24 | 1996-02-21 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulische schaltungsvorrichtung |
US5209063A (en) * | 1989-05-24 | 1993-05-11 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic circuit utilizing a compensator pressure selecting value |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2912131A (en) * | 1957-10-01 | 1959-11-10 | Demag Baggerfabrik Gmbh | Hydraulically operated machines |
GB1035141A (en) * | 1964-05-07 | 1966-07-06 | Priestman Brothers | Improvements relating to civil engineering machines |
GB1044851A (en) * | 1964-04-14 | 1966-10-05 | Auxitra Sa | Improvements in or relating to hydraulic systems for excavators |
GB1131750A (en) * | 1965-10-21 | 1968-10-23 | Linde Ag | Improvements in or relating to hydraulic drive systems |
DE2336157A1 (de) * | 1972-07-15 | 1974-01-24 | Kubota Ltd | Erdbaufahrzeug mit hydraulischer kraftuebertragung |
US3960284A (en) * | 1972-10-02 | 1976-06-01 | American Hoist & Derrick Company | Hydraulic backhoe circuitry |
DE3525823A1 (de) * | 1985-07-19 | 1987-01-29 | Schmitz Soehne Gmbh Maschf | Wegeabhaengige gleichlauf-drucksteuerung fuer zweiseitig arbeitende pressen, insbes. bundpressen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6244849Y2 (de) * | 1981-02-02 | 1987-11-28 | ||
JPS5897030U (ja) * | 1981-12-24 | 1983-07-01 | 株式会社小松製作所 | 油圧駆動車の走行用油圧回路 |
-
1988
- 1988-02-02 CA CA000557948A patent/CA1274748A/en not_active Expired - Fee Related
- 1988-02-12 EP EP19880102046 patent/EP0279362B1/de not_active Expired
- 1988-02-12 DE DE8888102046T patent/DE3861194D1/de not_active Expired - Fee Related
- 1988-02-19 JP JP63037318A patent/JP2604399B2/ja not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2912131A (en) * | 1957-10-01 | 1959-11-10 | Demag Baggerfabrik Gmbh | Hydraulically operated machines |
GB1044851A (en) * | 1964-04-14 | 1966-10-05 | Auxitra Sa | Improvements in or relating to hydraulic systems for excavators |
GB1035141A (en) * | 1964-05-07 | 1966-07-06 | Priestman Brothers | Improvements relating to civil engineering machines |
GB1131750A (en) * | 1965-10-21 | 1968-10-23 | Linde Ag | Improvements in or relating to hydraulic drive systems |
DE2336157A1 (de) * | 1972-07-15 | 1974-01-24 | Kubota Ltd | Erdbaufahrzeug mit hydraulischer kraftuebertragung |
US3960284A (en) * | 1972-10-02 | 1976-06-01 | American Hoist & Derrick Company | Hydraulic backhoe circuitry |
DE3525823A1 (de) * | 1985-07-19 | 1987-01-29 | Schmitz Soehne Gmbh Maschf | Wegeabhaengige gleichlauf-drucksteuerung fuer zweiseitig arbeitende pressen, insbes. bundpressen |
Non-Patent Citations (1)
Title |
---|
MACHINE DESIGN, vol. 40, no. 13, 6th June 1968, pages 166-170, Columbus, Ohio, US; W. MEISEL: "Hydraulic actuators" * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1338802A2 (de) * | 2002-02-26 | 2003-08-27 | Husco International, Inc. | Hydraulische Steuereinrichtung zum Betreiben von zwei parallel angeordneten Aktuatoren |
EP1338802A3 (de) * | 2002-02-26 | 2003-10-15 | Husco International, Inc. | Hydraulische Steuereinrichtung zum Betreiben von zwei parallel angeordneten Aktuatoren |
Also Published As
Publication number | Publication date |
---|---|
JPS63215467A (ja) | 1988-09-07 |
DE3861194D1 (de) | 1991-01-17 |
EP0279362B1 (de) | 1990-12-05 |
CA1274748A (en) | 1990-10-02 |
JP2604399B2 (ja) | 1997-04-30 |
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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 |
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