DE20313998U1 - hydraulic control - Google Patents
hydraulic control Download PDFInfo
- Publication number
- DE20313998U1 DE20313998U1 DE20313998U DE20313998U DE20313998U1 DE 20313998 U1 DE20313998 U1 DE 20313998U1 DE 20313998 U DE20313998 U DE 20313998U DE 20313998 U DE20313998 U DE 20313998U DE 20313998 U1 DE20313998 U1 DE 20313998U1
- Authority
- DE
- Germany
- Prior art keywords
- load pressure
- pressure
- pump
- stage
- valves
- 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.)
- Expired - Lifetime
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Classifications
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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
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
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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
- E02F9/2221—Control of flow rate; Load sensing arrangements
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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
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
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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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
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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
- 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
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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
- 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
- F15B2211/20584—Combinations of pumps with high and low capacity
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
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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
- 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
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
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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
- 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
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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
- 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
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
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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
- 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
- F15B2211/3127—Floating position connecting the working ports and the return line
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
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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
- 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
- F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
- F15B2211/323—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated the biasing means being adjustable
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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
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
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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
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
- F15B2211/40561—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged upstream of the flow control means
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41563—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a return line
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
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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
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
- F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/575—Pilot pressure control
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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
- 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
- F15B2211/6052—Load sensing circuits having valve means between output member and the load sensing circuit using check valves
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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
- 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
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
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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
- 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
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
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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
- 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
Abstract
Hydrauliksteuerung (S) einer über Wegesteuerventile (C1, C2) mit Lastdruckabgriff (L) steuerbaren Verbrauchergruppe (V1, V2), insbesondere mehreren Verbrauchern eines Absetzkippers, mit einer von einem gemeinsamen Antrieb (A) getriebenen Mehrstufen-Konstantpumpe (P), von der jeweils eine eine individuelle Fördermenge (Q1, Q2) liefernde Pumpenstufe (P1, P2) an die Druckversorgung zumindest einer Sektion der Verbrauchergruppe angeschlossen ist, mit einem jeder Pumpenstufe (P1, P2) zugeordneten, lastdruck- und pumpendruckabhängig gesteuerten Druckwaagen-Ablassregelventil (DW1, DW2) und mit den Druckwaagen-Ablassventilen (DW1, DW2) der Pumpenstufen (P1, P2) zugeordneten Sicherheitsventilen (13, 15), die auf vorbestimmte Lastdruckgrenzen eingestellt sind, dadurch gekennzeichnet, dass die Sicherheitsventile (13, 15) auf unterschiedliche Lastdruckgrenzen eingestellt sind, und dass alle Pumpenstufen (P1, P2) an ein allen Verbrauchem (V1, V2) gemeinsames Einkreis-Druckversorgungssystem (3, 4, 5) angeschlossen sind, in dem bis zum lastabhängigen Erreichen einer jeweils niedrigeren Lastdruckgrenze eine kombinierte Fördermenge aus der Fördermenge (Q2) der Pumpenstufe (P2) mit der höchsten Lastdruckgrenze und zumindest der Fördermenge (Q1) der Pumpenstufe (P1) mit...hydraulic control (S) one via directional control valves (C1, C2) with load pressure tap (L) controllable consumer group (V1, V2), in particular several consumers of a skip loader, with a by a common drive (A) driven multi-stage constant pump (P), one of which delivers an individual flow rate (Q1, Q2) Pump stage (P1, P2) to the pressure supply at least one section the consumer group is connected to one of each pump stage (P1, P2) associated, load pressure and pump pressure dependent controlled Pressure compensator drain control valve (DW1, DW2) and with the pressure compensator drain valves (DW1, DW2) of the pump stages (P1, P2) associated safety valves (13, 15), the predetermined Load pressure limits are set, characterized in that the safety valves (13, 15) to different load pressure limits are set, and that all pump stages (P1, P2) to an all Consumable (V1, V2) common single-circuit pressure supply system (3, 4, 5) are connected, in which up to the load-dependent achievement a respective lower load pressure limit combined flow from the flow rate (Q2) of the pump stage (P2) with the highest load pressure limit and at least the flow rate (Q1) of the pump stage (P1) with ...
Description
Die Erfindung betrifft eine Hydrauliksteuerung der im Oberbegriff des Anspruchs 1 angegebenen Art.The The invention relates to a hydraulic control in the preamble of Claim 1 specified type.
Derartige Hydrauliksteuerungen werden in der Praxis unter anderem in sogenannten Absetzkippern verwendet, d.h. in Fahrzeugen mit mehreren Hydraulikverbrauchern in einer Verbrauchergruppe, die einzeln oder auch teilweise überlappend zu steuern sind. Die Druckversorgung erfolgt bei einer solchen, aus der Praxis durch Vorbenutzung bekannten Hydrauliksteuerung mittels einer Mehrstufen-Konstantpumpe über einen einzigen Antrieb. Die Leistungsabgabe des Antriebs ist meist begrenzt. Jede Pumpenstufe ist nur an das Druckversorgungssystem einer Sektion der Verbrauchergruppe angeschlossen. Bei einem konkreten, bekannten Ausführungsbeispiel ist die Mehrstufen-Konstantpumpe eine Zweistufen- oder Doppel-Konstantpumpe, deren jede Pumpenstufe eine einzige Sektion der Verbrauchergruppe mit einer bestimmten Fördermenge versorgt, so dass ein Zweikreis-Druckversorgungssystem vorliegt. Jede Pumpenstufe fördert über einen Stromregler zum Tank, wenn kein Leistungsbedarf in der zugeordneten Verbrauchersektion vorliegt. Wird dabei in der anderen Verbrauchersektion ein Verbraucher gesteuert, ist nur die Fördermenge der dieser Sektion zugeordneten Pumpenstufe nutzbar, während die Fördermenge der anderen Pumpenstufe ungenutzt in den Tank abströmt. Für jede Pumpenstufe kann eine andere Lastdruckgrenze eingestellt sein, die derart gewählt sind, dass auch bei Betätigung von Verbrauchern in beiden Sektionen bis zum Erreichen der niedrigeren Lastdruckgrenze die Leistungsgrenze des Antriebs nicht überschritten wird.such Hydraulic controls are in practice, inter alia, in so-called Skip loaders used, i. in vehicles with several hydraulic consumers in a consumer group, individually or partially overlapping are to control. The pressure supply takes place with such, from practice by prior use known hydraulic control means a multi-stage constant pump over a single drive. The power output of the drive is usually limited. Each pump stage is only to the pressure supply system connected to a section of the consumer group. In a concrete, known embodiment is the multi-stage constant pump a two-stage or double-constant pump, each pump stage is a single section of the consumer group with a certain flow rate supplied, so that a two-circuit pressure supply system is present. Each pump stage delivers via a current regulator to the tank when no power needed in the associated consumer section is present. Becomes a consumer in the other consumer section controlled, only the flow rate the pump stage associated with this section, while the output the other pump stage flows unused into the tank. For every pump stage may be set a different load pressure limit, which are chosen such that also when operated from consumers in both sections until reaching the lower one Load pressure limit does not exceed the power limit of the drive becomes.
Der Erfindung liegt die Aufgabe zugrunde, eine Hydrauliksteuerung der eingangs genannten Art zu schaffen, in der die Verbraucher eine aus den Pumpenstufen verfügbare, maximale Fördermenge größer als die Fördermenge nur einer Pumpenstufe nutzen können.Of the Invention is based on the object, a hydraulic control of to create the type mentioned in the beginning, in which consumers have a available from the pump stages, maximum flow rate greater than the flow rate can use only one pump stage.
Die gestellte Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst.The Asked object is achieved with the features of claim 1.
Da die vorhandenen Pumpenstufen in das allen Verbrauchern gemeinsame Einkreis-Druckversorgungssystem fördern, steht zumindest bis zum Erreichen der niedrigeren Lastdruckgrenze die gesamte Fördermenge aus allen Pumpenstufen zur Nutzung durch jeden Verbraucher zur Verfügung. Da diese kombinierte Fördermenge nur bis zum Erreichen der niedrigeren Lastdruckgrenze tatsächlich zum Steuern eines oder mehrerer Verbraucher benutzt wird, wird auch der gemeinsame Antrieb der Mehrstufen-Konstantpumpe nicht über seine Leistungsgrenze belastet. Sobald jedoch die niedrigere Lastdruckgrenze erreicht und die zugehörige Pumpenstufe auf drucklosen Umlauf geschaltet wird, bleibt im Einkreis-Druckversorgungssystem weiterhin die Fördermenge der Pumpenstufe mit der höchsten Lastdruckgrenze nutzbar. Da dann die Leistungsabnahme der wenigstens einen Pumpenstufe mit niedrigerer Lastdruckgrenze verringert ist, kann zumindest die höchste Lastdruckgrenze der dann weiter zur Steuerung benutzten Pumpenstufe optimal hochgesetzt werden. Es lässt sich auf diese Weise beispielsweise mit mehreren Pumpenstufen eine treppenartige, für eine bezüglich der Leistungsgrenze des Antriebs optimale Förderleistung erzielen.There the existing pump stages common to all consumers Single-circuit pressure supply system promote, at least until reaching the lower load pressure limit the entire flow available from all pump stages for use by any consumer. There this combined flow only until the lower load pressure limit is actually reached for control one or more consumers is used, is also the common Drive of the multi-stage constant pump is not loaded beyond its capacity limit. However, as soon as the lower load pressure limit is reached and the associated pump stage is switched to pressureless circulation, remains in the single-circuit pressure supply system continue the flow rate the pump level with the highest Load pressure limit usable. Since then the decrease in performance of at least a pump stage with a lower load pressure limit is reduced, can be at least the highest Load pressure limit of the then used to control the pump stage be optimally elevated. It leaves in this way, for example, with several pump stages one staircase, for a respect the performance limit of the drive optimal performance.
Bei einer zweckmäßigen Ausführungsform ist ein gemeinsamer Lastdruckmeldekreis für alle Lastdruckabgriffe der Verbrauchergruppe vorgesehen. Aus dem Lastdruckmeldekreis werden die Druckwaagen-Ablassventile gegen den Versorgungsdruck vorgesteuert, der aus dem Einkreis-Druckversorgungssystem abgegriffen wird. Damit dann, wenn eine Pumpenstufe mit niedrigerer Lastdruckgrenze im drucklosen Umlauf arbeitet, kein Druckmittel von der Pumpenstufe mit der höheren Lastdruckgrenze abströmen kann, ist die jeweils auf eine niedrigere Lastdruckgrenze eingestellte Pumpenstufe durch ein Rückschlagventil gegenüber dem Einkreis-Druckversorgungssystem abgesichert. Ferner ist dem Sicherheitsventil, an dem jeweils die niedrigere Lastdruckgrenze eingestellt wird, eine Blende vorgesetzt, die verhindert, dass bei Ansprechen dieses Sicherheitsventils auch der Lastdruck für das jeweils andere Sicherheitsventil abgebaut wird. Mit dieser Verschaltung stellt sich die Hydrauliksteuerung selbsttätig auf die jeweiligen Operationsbedingungen ein, so dass zumindest bis zum Ansprechend eines Sicherheitsventils eine kombinierte maximale Fördermenge im Einkreis-Druckversorgungssystem von allen Verbrauchern der Verbrauchergruppe nutzbar ist.at an expedient embodiment a common load pressure signaling circuit for all load pressure taps the Consumer group. From the load pressure alarm circuit pre-controlled the pressure compensator drain valves against the supply pressure, which is tapped from the single-circuit pressure supply system. In order to then, if a pump stage with lower load pressure limit in non-pressurized Circulation works, no pressure medium from the pump stage with the higher load pressure limit flow out can, is set to a lower load pressure limit Pump stage through a check valve across from Secured to the single-circuit pressure supply system. Furthermore, the Safety valve, on each of which the lower load pressure limit is set, a diaphragm preset, which prevents at Response of this safety valve also the load pressure for each other safety valve is dismantled. With this interconnection the hydraulic control adjusts automatically to the respective operating conditions, so that at least until the response of a safety valve a combined maximum flow in the single-circuit pressure supply system of all consumers of the consumer group is usable.
Da der Leistungsbedarf einer Pumpenstufe dann deutlich verringert ist, wenn das zugeordnete Sicherheitsventil angesprochen hat und das Druckwaagen-Ablassregelventil auf drucklosen Umlauf schaltet, lässt sich dann die Leistung des Antriebs überwiegend zur Förderung mit der Pumpenstufe nutzen, die auf die höchste Lastdruckgrenze eingestellt ist. Diese Pumpenstufe wird zweckmäßig auch mit der höchsten Fördermenge ausgelegt.There the power requirement of a pump stage is then significantly reduced, when the assigned safety valve has responded and the Pressure compensator drain control valve switches to non-pressurized circulation, can be then the power of the drive predominantly to promote use with the pump stage set to the highest load pressure limit is. This pump stage is useful even with the highest flow rate designed.
Die Fördermenge der weiteren Pumpenstufen werden stufenweise abnehmend eingestellt, wobei die jeweils eingestellten Lastdruckgrenzen ebenfalls mit den abnehmenden Fördermengen gestuft abnehmen können. Auf diese Weise lässt sich das bereits erwähnte Treppenprofil der Druck/Fördermengen-Charakteristik optimal einstellen.The output the other pump stages are set gradually decreasing, whereby the respectively set load pressure limits likewise with the decreasing flow rates stepped down. That way the already mentioned Stair profile of the pressure / flow characteristics set optimally.
Bei einer zweckmäßigen Ausführungsform wird nur eine Zweistufen- oder Doppelkonstantpumpe vorgesehen, deren Pumpenstufen-Fördermengen in einem Verhältnis von etwa 2:1 stehen. Die Lastdruckgrenze für die Pumpenstufe mit der höchsten Fördermenge wird um etwa 50 % höher eingestellt, als die Lastdruckgrenze der anderen Pumpenstufe. Beispielsweise wird bei einer Fördermenge der einen Pumpenstufe von etwa 77 l/min die Lastdruckgrenze auf etwa 300 Bar eingestellt, während bei der Pumpenstufe mit einer Fördermenge von etwa 38,5 l/min die Lastdruckgrenze auf nur etwa 200 Bar eingestellt wird.In an expedient embodiment, only a two-stage or Doppelkonstantpum provided whose pump stage flow rates are in a ratio of about 2: 1. The load pressure limit for the pump stage with the highest flow rate is set approximately 50% higher than the load pressure limit of the other pump stage. For example, with a flow rate of a pump stage of about 77 l / min, the load pressure limit is set to about 300 bar, while in the pump stage with a flow rate of about 38.5 l / min, the load pressure limit is set to only about 200 bar.
Um Druckschwingungen im System zu vermeiden, und zwar sowohl beim Umschalten des jeweiligen Ablass-Druckwaagenregelventils auf drucklosen Durchlauf als auch bei normalen Druckregelvorgängen vor Erreichen der Lastdruckgrenze, ist zweckmäßigerweise im Steuerkreis zwischen dem Lastdruckmeldekreis und den Sicherheitsventilen eine hydraulische Dämpfvorrichtung vorgesehen. Diese Dämpfvorrichtung kann eine Dämpfdrossel und zwei gegensinnige Beipass-Rückschlagventile aufweisen, von denen nur eine, zweckmäßigerweise das in Strömungsrichtung zum Lastdruckmeldekreis öffnende Rückschlagventil, federbeaufschlagt wird.Around To avoid pressure oscillations in the system, both during switching of the respective discharge pressure compensator valve on pressure-free passage as well as in normal pressure control operations before reaching the load pressure limit, is expediently in the control circuit between the load pressure control circuit and the safety valves hydraulic damping device intended. This damping device can a damping throttle and have two opposite by-pass check valves, of which only one, suitably the in the flow direction opening to load pressure signaling circuit Check valve, is spring loaded.
Schließlich ist es zweckmäßig, einzelne Lastdruckleitungsabschnitte über Wechselventile miteinander zu verknüpfen, so dass den Sicherheitsventilen stets der höchste Lastdruck von den betätigten Verbrauchern gemeldet wird.Finally is it is expedient, individual load pressure line sections via shuttle valves with each other to link, so that the safety valves always the highest load pressure from the actuated consumers is reported.
Anhand
der Zeichnung wird eine Ausführungsform
des Erfindungsgegenstandes erläutert.
Eine
in
In
der Hydrauliksteuerung S wird jeder Verbraucher V1, V2 mittels eines
Wegesteuerventils C1, C2 in seiner Richtung und Geschwindigkeit
gesteuert. Die Wegeventile C1, C2 sind beispielsweise magnet- und
handbetätigte
Proportionalwegesteuerventile mit Druckvorsteuerung und jeweils
mindestens einem Lastdruckabgriff L für den Lastdruck des Verbrauchers
V1, V2. Die Wegesteuerventile C1, C2 sind an ein gemeinsames Einkreis-Druck-versorgungssystem
Von
den Pumpenstufen P1, P2 führen
Anschlussleitungen
Ferner
ist ein gemeinsamer Lastdruckmeldekreis
Jeder
Pumpenstufe P1, P2 ist ein Druckwaagen-Ablassregelventil DW1, DW2
zum Tank T zugeordnet, das durch eine Regelfeder F1, F2 in Schlließrichtung
beaufschlagt ist. Ferner sind die Schließsteuerseiten der Druckwaagen-Ablassregelventile DW1,
DW2 an den gemeinsamen Lastdruckmeldekreis
Die
hydraulische Dämpfungsvorrichtung
Von
der Abzweigung
Von
der Abzweigung
Die
Aufsteuerseiten der beiden Druckwaagen-Ablassregelventile DW1, DW2
sind an das Einkreis-Druckversorgungssystem
Weitere
schaltungstechnische Details in
Funktionfunction
Wird
der Antrieb A eingeschaltet, dann fördern beide Pumpenstufen P1,
P2 ihre Fördermengen Q1,
Q2. Die Druckwaagen-Ablassregelventile DW1, DW2 sind in ihren Schließstellungen.
Wird kein Verbraucher V1, V2 betätigt,
dann stellen die Steuerdrücke
in den Steuerleitungen
Wird
beispielsweise der Verbraucher V1 durch Betätigen des Wegesteuerventils
C1 gesteuert, so baut sich im Lastdruckmeldesystem
Wird
im Lastdruckmeldesystem
Damit
bei drucklosem Umlauf der Pumpenstufe P1 kein Druckmittel von der
Zusammenführung
Jeder
Verbraucher V1, V2 kann dann bis zum Erreichen der höchsten Lastdruckgrenze
des Sicherheitsventils
Obwohl
in
Die
Größe der Blende
B ist so gewählt,
dass die Blende B weniger Steuerdruckmittel abströmen lässt, als
Steuerdruckmittel aus dem Lastdruckmeldesystem
Die
hydraulische Dämpfungsvorrichtung
Anstelle
der Druckwaagen-Ablassregelventile DW1, DW2 könnten auch Dreiwege-Stromregelventile
benutzt werden. Ferner ist es möglich,
die Sicherheitsventile
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20313998U DE20313998U1 (en) | 2003-09-09 | 2003-09-09 | hydraulic control |
DE200450002747 DE502004002747D1 (en) | 2003-09-09 | 2004-05-12 | hydraulic control |
EP20040011284 EP1515049B1 (en) | 2003-09-09 | 2004-05-12 | Hydraulic control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20313998U DE20313998U1 (en) | 2003-09-09 | 2003-09-09 | hydraulic control |
Publications (1)
Publication Number | Publication Date |
---|---|
DE20313998U1 true DE20313998U1 (en) | 2005-01-13 |
Family
ID=34072161
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE20313998U Expired - Lifetime DE20313998U1 (en) | 2003-09-09 | 2003-09-09 | hydraulic control |
DE200450002747 Active DE502004002747D1 (en) | 2003-09-09 | 2004-05-12 | hydraulic control |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200450002747 Active DE502004002747D1 (en) | 2003-09-09 | 2004-05-12 | hydraulic control |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1515049B1 (en) |
DE (2) | DE20313998U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020209387B3 (en) * | 2020-07-24 | 2021-07-15 | Hawe Hydraulik Se | Preselection valve, hydraulic valve bank and hydraulic control device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US190431A (en) | 1877-05-08 | Improvement in gas-burners | ||
US4559965A (en) | 1984-01-09 | 1985-12-24 | J. I. Case Company | Multiple compensating unloading valve circuit |
DE3503559A1 (en) * | 1985-02-02 | 1986-08-07 | Robert Bosch Gmbh, 7000 Stuttgart | HYDRAULIC SYSTEM |
-
2003
- 2003-09-09 DE DE20313998U patent/DE20313998U1/en not_active Expired - Lifetime
-
2004
- 2004-05-12 DE DE200450002747 patent/DE502004002747D1/en active Active
- 2004-05-12 EP EP20040011284 patent/EP1515049B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1515049A1 (en) | 2005-03-16 |
EP1515049B1 (en) | 2007-01-24 |
DE502004002747D1 (en) | 2007-03-15 |
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