EP1515049A1 - Hydrauliksteuerung - Google Patents
Hydrauliksteuerung Download PDFInfo
- Publication number
- EP1515049A1 EP1515049A1 EP04011284A EP04011284A EP1515049A1 EP 1515049 A1 EP1515049 A1 EP 1515049A1 EP 04011284 A EP04011284 A EP 04011284A EP 04011284 A EP04011284 A EP 04011284A EP 1515049 A1 EP1515049 A1 EP 1515049A1
- Authority
- EP
- European Patent Office
- 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.)
- Granted
Links
- 230000001419 dependent effect Effects 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 10
- 230000011664 signaling Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 3
- 230000036316 preload Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- 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
-
- 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
-
- 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
- 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
-
- 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
- F15B2211/20584—Combinations of pumps with high and low 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check 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
- 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
-
- 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
- F15B2211/30—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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/40—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
-
- 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
-
- 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
-
- 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
- F15B2211/50—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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Definitions
- the invention relates to a hydraulic control system in the preamble of claim 1 specified type.
- Such hydraulic controls are in practice, inter alia, in skip dumpers used, i. in vehicles with several hydraulic loads, either individually or are also partially overlapping to control.
- the pressure supply takes place at one
- the power of the drive is limited.
- the multi-stage constant pump is a two-stage or double constant-flow pump, each pump stage is a single section of the consumer group supplied with a certain flow rate, so that a two-circuit pressure supply system is present.
- Each pump stage delivers via a current regulator to the tank when there is no power requirement in the associated consumer section.
- a known drain hydraulic control of an earthworking machine are with a single-circuit pressure supply system two feed pumps with fixed displacement connected in parallel. Between a return line from the Drain control valves of the hydraulic control and the two pumps are two parallel Pressure compensators provided, each of which by a load pressure signal in the closing direction and a pressure signal from the introduction pressure supply in the opening direction is pre-controlled.
- the load pressure signal control circuit is via two adjustable pressure relief valves secured to the return, with each pressure relief valve is opened by the downstream of a throttle tapped load pressure signal.
- the two Pressure relief valves are set to different pressure limits.
- the invention is based on the object, a hydraulic control of the aforementioned To create a way in which consumers have a pumping stage available, maximum flow rate greater than the flow rate of only one pump stage to be able to use.
- a common load pressure signaling circuit intended for all load pressure tapes of the consumer group.
- the pressure compensator drain valves are against the supply pressure pilot operated, which is tapped from the single-circuit pressure supply system.
- no pressure fluid from the pump stage with the higher load pressure limit flow can is the pump level set to a lower load pressure limit through a check valve with respect to the single-circuit pressure supply system hedged.
- the safety valve on each of which lower load pressure limit is set, a diaphragm preset, which prevents that when this safety valve responds also the load pressure for the other Safety valve is removed. With this interconnection arises the hydraulic control 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.
- the flow rate of the other pump stages are adjusted gradually decreasing, whereby the respectively set load pressure limits likewise with the decreasing Flow rates can decrease in stages. This is already possible optimally set the mentioned stair profile of the pressure / delivery characteristics.
- the pump stage flow rates in a ratio of about 2: 1 stand.
- the load pressure limit for the pump stage with the highest flow rate is set about 50% higher than the load pressure limit of the others Pump stage. For example, at a flow rate of a pump stage of about 77 l / min the load pressure limit set to about 300 bar, while at the pump stage with a flow rate of about 38.5 l / min the load pressure limit to only about 200 bar is set.
- the damping device may include a damping throttle and two reverse bypass check valves have, of which only one, suitably in the flow direction to the load pressure detection circuit opening check valve, spring loaded becomes.
- FIG. 1 is a block diagram of a hydraulic control such as, for example in a skip loader for the hydraulic consumer is available.
- a hydraulic control S shown in FIG. 1 is used to actuate a plurality of consumers a consumer group, of which for the sake of simplicity only two consumers V1 and V2 are indicated, although quite another, not shown in Fig. 1 Provided consumers and can be incorporated into the hydraulic control S.
- each consumer V1, V2 by means of a directional control valve C1, C2 controlled in his direction and speed.
- Directional valves C1, C2 are, for example, magnetically and manually operated proportional directional control valves with Pressure pre-control and at least one load pressure tap L for the load pressure of the consumer V1, V2.
- the directional control valves C1, C2 are connected to a common Single-circuit pressure supply system 3, 4, 5 and a tank line 6 at connected to a tank T.
- For pressure supply is a multi-stage constant pump P is provided, which is driven by a single drive A. in the shown embodiment in Fig.
- the flow Q1 is a two-stage or Double fixed displacement pump with a first pump stage P1 for a delivery Q1 and a second pump stage P2 for a delivery Q2.
- the flow Q1 For example, is about 38.5 l / min, while the flow rate Q2, for example 77 l / min.
- P2 leads connecting lines 1, 2 to a merge 3, of which a supply line 4 to a common to all consumers V1, V2 Main supply line 5 leads.
- a common load pressure signaling circuit 8 is provided, to which the load pressure handles L all Wege thoroughlyventile C1, C2 are connected, expediently shuttle valves W linking individual load pressure control line sections.
- Each pump stage P1, P2 is a pressure compensator drain control valve DW1, DW2 for Tank T assigned, which acts by a control spring F1, F2 in Schlulraum is. Further, the closing control sides of the pressure compensator discharge control valves are DW1, DW2 connected to the common load pressure signaling circuit 8. To this Purpose branches from a central shuttle valve W from a control line 9, in the a hydraulic damping device 10 is arranged, and to a branch 11 leads.
- the hydraulic damping device 10 includes a damping throttle 20 and two arranged in opposite directions bypass check valves 21, 22, of which at least the Beige-check valve 22 opening to the load pressure alarm circuit 8 is spring-loaded (Valve spring 23) can be.
- a control line 12 leads to the closing control side of the Pressure compensator drain control valve DW1 and to the inlet of a safety valve 13, acted upon by a spring in the closing direction and in the opening direction of the Control line 12 is pressure-controlled.
- a diaphragm B is provided upstream of the safety valve 13 and downstream the branch 11.
- the safety valve 13 is on set a low load pressure limit, for example to 200 bar.
- a control line 14 leads to a further safety valve 15, which corresponds functionally to the safety valve 13, and also to the closing control side the other pressure compensator drain control valve DW2.
- the safety valve 15 is set to a higher load pressure limit or to the highest load pressure limit, For example, to about 300 bar.
- the mentioned load pressure limits for example be varied using the safety valve springs.
- In the control line 14 is no aperture included.
- the control sides of the two pressure compensator drain control valves DW1, DW2 are on the single-circuit pressure supply system 3, 4, 5 connected.
- branches to Control pressure side of the pressure compensator drain control valve DW1 a control line 16 from the merge 3 off.
- a diaphragm 17 is included.
- the control line 16 could also be to the control side of the other pressure compensator Ablouregelventils Be led DW2.
- a diaphragm 19 In the control line 18 is also included a diaphragm 19.
- the lower load pressure limit of the safety valve 13 reaches, then the safety valve 13 is switched to passage and the Control line 12 relieved.
- the pressure compensator drain control valve DW1 is placed over the Pressure in the control line 16 set to passage, so that the flow Q1 in the tank T flows out. Since the safety valve 15 at this lower load pressure limit does not respond, the single-circuit pressure supply system 3, 4, 5 will continue fed with the flow Q2 of the other pump stage P2.
- Each consumer V1, V2 can then until reaching the highest load pressure limit the safety valve 15 continue to be operated with the flow Q2, where, suitably, the flow Q2 and the highest load pressure limit are selected at the safety valve 15 so that when reaching the highest load pressure limit the drive A is not overloaded.
- the hydraulic controller could be a multi-stage fixed displacement pump P with more than two Include pump stages. Then each would have a pump stage with low load pressure limit by a check valve corresponding to the check valve 7 opposite a pump stage to be protected with higher load pressure limit. Further Each safety valve would have to be at a lower than the highest load pressure limit is set to be secured by a diaphragm analog to the diaphragm B to Prevent that from responding when the associated pressure compensator bleed control valve relieved control pressure also the control pressure for that to a higher Load pressure limit set safety valve could decrease.
- the size of the diaphragm B is chosen so that the diaphragm B less control pressure medium can flow out, as a control pressure medium flows from the load pressure reporting system 8.
- the hydraulic damping device 10 is important because the damping throttle 20, although they are in both flow directions via the respective check valve 21st or 22 is bypassable, pressure oscillations in the control circuit quickly to subsidence brings before they transfer via the pressure compensators DW1, DW2 in the working lines be, and / or if such pressure oscillations from the working lines or from have been transferred to the consumers in the control circuit.
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)
Abstract
Description
Claims (7)
- Hydrauliksteuerung (S) für eine über Wegesteuerventile (C1, C2) mit Lastdruckabgriff (L) steuerbare Verbrauchergruppe (V1, V2), insbesondere für mehrere Verbraucher 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), zum Begrenzen des Lastdrucks in einem Lastdruckmeldekreis (8), dadurch gekennzeichnet, dass die Sicherheitsventile (13, 15) auf unterschiedliche Lastdruckgrenzen eingestellt sind, dass alle Pumpenstufen (P1, P2) an ein allen Verbrauchern (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 der nächst niedrigeren Lastdruckgrenze für jeden Verbraucher (V1, V2) nutzbar ist, und dass zwischen dem Lastdruckmeldekreis (8) und den Sicherheitsventilen (13, 15) eine hydraulische Dämpfvorrichtung (10) vorgesehen ist.
- Hydrauliksteuerung nach Anspruch 1, dadurch gekennzeichnet, dass ein an die Druckwaagen-Ablassregelventile (DW1, DW2) an deren Schließseiten angeschlossener, gemeinsamer Lastdruckmeldekreis (8) für alle Lastdruckabgriffe (L) vorgesehen ist, dass das Einkreis-Druckversorgungssystem (3, 4, 5) an die Aufsteuerseiten der Druckwaagen-Ablassregelventile (DW1, DW2) angeschlossen ist, dass zwischen einer Zusammenführung (3) der Pumpenstufen (P1, P2) in das Einkreis-Druckversorgungssystem und einer Anschlussleitung (1) von der Pumpenstufe (P1), der die niedrigere Lastdruckgrenze zugeordnet ist, und dem Druckwaagen-Ablassregelventil (DW1) ein zum Druckwaagen-Ablassregelventil (DW1) sperrendes Rückschlagventil (7) angeordnet ist, und dass stromab einer Abzweigung (11) vom Lastdruckmeldekreis (8) zu den Sicherheitsventilen (13, 15) dem Sicherheitsventil (13), an dem jeweils die niedrigere Lastdruckgrenze eingestellt ist, eine Blende (B) vorgesetzt ist.
- Hydrauliksteuerung nach Anspruch 1, dadurch gekennzeichnet, dass das Sicherheitsventil (15) der Pumpenstufe (P2) mit der höchsten Fördermenge (Q2) auf die höchste Lastdruckgrenze eingestellt ist.
- Hydrauliksteuerung nach Anspruch 3, dadurch gekennzeichnet, dass Sicherheitsventile (13) weiterer Pumpenstufen (P1, P2), die stufenweise gegenüber der höchsten Fördermenge (Q2) abnehmende Fördermengen (Q1) liefern, auf mit den abnehmenden Fördermengen (Q1) gestuft abnehmende Lastdruckgrenzen eingestellt sind.
- Hydrauliksteuerung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mehrstufen-Konstantpumpe (P1) eine Zweistufenoder Doppel-Konstantpumpe ist, deren Pumpen-Stufen-Fördermengen (Q2, Q1) in einem Verhältnis von etwa 2:1 stehen, wobei die Lastdruckgrenze des Sicherheitsventils (15) der Pumpenstufe (P2) mit der höchsten Fördermenge (Q2) um etwa 50 % höher eingestellt ist als die Lastdruckgrenze des Sicherheitsventils (13) der anderen Pumpenstufe (P1), vorzugsweise bei Fördermengen von 77 bzw. 38,5 l/min auf 300 bzw. 200 Bar.
- Hydrauliksteuerung nach Anspruch 1, dadurch gekennzeichnet, dass die hydraulische Dämpfvorrichtung (10) in einem Steuerkreis eine Dämpfdrossel (20) und zwei gegensinnige Beipass-Rückschlagventile (21, 22) umfasst, von denen nur eines federbeaufschlagt ist.
- Hydrauliksteuerung nach Anspruch 2, dadurch gekennzeichnet, dass im Lastdruckmeldekreis (8) einzelne Lastdruckleitungsabschnitte über den jeweils höchsten Lastdruck an die Sicherheitsventile (13, 15) meldende Wechselventile (W) miteinander verbunden sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20313998U DE20313998U1 (de) | 2003-09-09 | 2003-09-09 | Hydrauliksteuerung |
| DE20313998U | 2003-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1515049A1 true EP1515049A1 (de) | 2005-03-16 |
| EP1515049B1 EP1515049B1 (de) | 2007-01-24 |
Family
ID=34072161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040011284 Expired - Lifetime EP1515049B1 (de) | 2003-09-09 | 2004-05-12 | Hydrauliksteuerung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1515049B1 (de) |
| DE (2) | DE20313998U1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020209387B3 (de) * | 2020-07-24 | 2021-07-15 | Hawe Hydraulik Se | Vorwahlventil, Hydraulikventilverband und Hydrauliksteuervorrichtung |
Citations (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 |
| EP0190431A2 (de) * | 1985-02-02 | 1986-08-13 | Robert Bosch Gmbh | Hydraulikanlage |
-
2003
- 2003-09-09 DE DE20313998U patent/DE20313998U1/de not_active Expired - Lifetime
-
2004
- 2004-05-12 DE DE200450002747 patent/DE502004002747D1/de not_active Expired - Lifetime
- 2004-05-12 EP EP20040011284 patent/EP1515049B1/de not_active Expired - Lifetime
Patent Citations (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 |
| EP0190431A2 (de) * | 1985-02-02 | 1986-08-13 | Robert Bosch Gmbh | Hydraulikanlage |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502004002747D1 (de) | 2007-03-15 |
| EP1515049B1 (de) | 2007-01-24 |
| DE20313998U1 (de) | 2005-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1092095B2 (de) | Hydraulische schaltung | |
| DE3702000A1 (de) | Steuervorrichtung fuer ein hydrostatisches getriebe fuer wenigstens zwei verbraucher | |
| DE4036720C2 (de) | Steuerschaltung für die lastunabhängige Aufteilung eines Druckmittelstromes | |
| EP0958455B1 (de) | Hydraulischer steuerkreis für einen vorrangigen und für einen nachrangigen hydraulischen verbraucher | |
| DE19615593A1 (de) | Hydrostatisches Antriebssystem | |
| EP1635070B1 (de) | Elektrohydraulische Steuervorrichtung | |
| DE3420674C2 (de) | Druckversorgungseinrichtung für ein Hydrauliksystem | |
| EP2157320B1 (de) | Hydrauliksteuerung für einen Hydromotor | |
| DE19646427B4 (de) | Ventilanordnung | |
| DE19709958B4 (de) | Hydrostatisches Antriebssystem | |
| DE3844400C2 (de) | Ventilanordnung für ein hydraulisches System | |
| DE112004002768B4 (de) | Hydraulisches Steuersystem | |
| DE9111569U1 (de) | Steuervorrichtung für wenigstens einen Hydromotor | |
| DE3233046A1 (de) | Elektrohydraulische steuervorrichtung | |
| EP0823559B1 (de) | Hydraulische Steuereinrichtung | |
| EP3135924B1 (de) | Hydrauliksteuerung | |
| EP2404493A1 (de) | Hubwerk | |
| EP1635072B1 (de) | Elektrohydraulische Steuervorrichtung | |
| DE3844405C2 (de) | Ventilanordnung für ein hydraulisches System | |
| EP1515049A1 (de) | Hydrauliksteuerung | |
| DE102012006551A1 (de) | Hydraulische Schaltungsanordnung | |
| DE2800814A1 (de) | Hydraulische steuereinrichtung | |
| DE19542275A1 (de) | Vorzugsstromschaltung | |
| DE3844399C2 (de) | Steueranordnung für mehrere unabhängig voneinander betätigbare hydraulische Verbraucher und deren Verwendung | |
| EP1837529B1 (de) | Hydraulische Steuervorrichtung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL HR LT LV MK |
|
| 17P | Request for examination filed |
Effective date: 20050415 |
|
| AKX | Designation fees paid |
Designated state(s): DE IT |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE IT |
|
| REF | Corresponds to: |
Ref document number: 502004002747 Country of ref document: DE Date of ref document: 20070315 Kind code of ref document: P |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20071025 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20080521 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090512 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140527 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502004002747 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151201 |