EP1452744A1 - Hydraulische Steueranordnung - Google Patents
Hydraulische Steueranordnung Download PDFInfo
- Publication number
- EP1452744A1 EP1452744A1 EP04004260A EP04004260A EP1452744A1 EP 1452744 A1 EP1452744 A1 EP 1452744A1 EP 04004260 A EP04004260 A EP 04004260A EP 04004260 A EP04004260 A EP 04004260A EP 1452744 A1 EP1452744 A1 EP 1452744A1
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- EP
- European Patent Office
- Prior art keywords
- pressure
- control
- inlet
- nozzle
- arrangement according
- 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
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000011664 signaling Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
- 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
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- 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
- F15B2211/30515—Load holding 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
- F15B2211/35—Directional control combined with flow control
- F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/35—Directional control combined with flow control
- F15B2211/353—Flow control by regulating means in return line, i.e. meter-out control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/365—Directional control combined with flow control and 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
- F15B2211/50—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
- F15B2211/50572—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using a pressure compensating valve for controlling the pressure difference across a flow 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
- F15B2211/50—Pressure control
- F15B2211/57—Control of a differential 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
- F15B2211/5756—Pilot pressure control for opening a 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
- F15B2211/60—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
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting 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
- F15B2211/76—Control of force or torque of the output member
- F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
Definitions
- the invention relates to a hydraulic control arrangement according to the preamble of claim 1.
- Such control arrangements are based on the load-sensing principle and are for example in the DE 197 15 020 A1 discloses.
- This publication shows an LS control block, in which a consumer has a LS directional valve is supplied with pressure medium. That is proportional adjustable directional valve has a spool, the one with a valve housing a direction / speed part formed. About the directional part the pressure medium supply and the pressure medium outlet to or controlled by the consumer and the speed part specifies the pressure medium volume flow.
- the solution is the speed part by each one adjustable in the inlet and return Measuring aperture formed, the opening cross section through the Axial displacement of a spool is changeable.
- a pressure compensator is installed upstream of the orifice plates Opening direction from the force of a spring and the load pressure downstream of the metering orifice and in the closing direction from the pressure upstream of the inlet orifice is acted upon.
- Such an LS control block for control purposes of a lifting cylinder with a pushing load a lowering brake valve assigned.
- a lowering brake valve is in principle a check valve that can be unlocked by the pressure in the inlet and thus a controlled one when the load is pressing Lowering enables. It turned out that such System with LS control block and lowering brake valve for certain Operating conditions tend to vibrate.
- This Vibration sensitivity results from the fact that the lowering brake valve -as mentioned above- from the pressure in the inlet, i.e. H. controlled by the pressure downstream of the inlet orifice becomes. If this inlet pressure is not sufficient, it will Lowering brake valve closed and accordingly the return controlled closed.
- the invention is based on the object a hydraulic control arrangement for control to create a consumer where the susceptibility to vibration is reduced.
- the reporting pressure is not downstream the inlet-side measuring orifice on a control channel that has a section upstream the inlet-side measuring orifice with a section upstream the outlet-side measuring orifice connects.
- This Reporting pressure is much less dependent on Pressure fluctuations, so that, for example, during use a lowering brake valve - the resulting vibrations not - as in the case of the Technology - directly affect the reporting pressure, as it were a "smoothed" signal pressure on the pressure compensator and / or the variable displacement pump of the LS system is present.
- the Control channel only needs to be designed so that the tapped pressure is lower than that on the pressure compensator effective pressure in the closing direction.
- a control arrangement is known from DE 38 02 672 C2, in the case of an LS system, the reporting pressure also comes on a pressure divider is tapped.
- the the pressure divider containing control line extends to this However, variant between an area upstream the inlet orifice and a tank channel and not as in the invention - each between the upstream Sections in front of the orifice plates (in the pressure medium flow direction seen).
- control channel contains a fixed and an adjustable one Nozzle, the reporting pressure in one section is tapped between these two nozzles. This means, the reporting pressure is practically between at a pressure divider the high pressure (inlet) and the low pressure (outlet) tapped.
- the adjustable nozzle becomes dependent from the setting of the inlet metering orifice changed. More specifically, the adjustable nozzle adjusted inversely proportional to the metering orifice, that means the cross section of the adjustable nozzle is included increasing stroke of the directional valve is reduced.
- the hydraulic Control arrangement of an LS directional control valve via that a speed part is formed.
- the speed section of the LS directional control valve forms the inlet metering orifice and the outlet orifice, the control channel with the pressure divider (fixed nozzle, adjustable nozzle) in a control spool of the LS directional control valve is integrated.
- control slide has a central annular groove, in the basic position in the area of a pressure connection of the directional control valve is arranged and via the at Axial displacement of the control spool connects to Inlet or outlet connection open becomes.
- a control collar adjoining the annular groove, via which the Connection to the drain connection is controllable with a radial nozzle bore, which one to Return connection tapering opening cross-section Has.
- This nozzle hole forms the adjustable nozzle and opens into an axial bore of the control spool.
- This axial bore also opens radially Running control oil inlet hole through which the axial hole with a pressure leading the pressure connection Pressure chamber is connectable.
- This control oil feed hole corresponds to the fixed nozzle of the control channel.
- the between these two nozzles (nozzle bore, control oil inlet bore) setting pressure is via a LS connection tapped and, if necessary, via a Shuttle valve arrangement - to the upstream pressure compensator and / or reported to the variable pump.
- control spool manufacture of the control spool is special easy if the inlet bore and the nozzle bore on same tax union are formed.
- the circumferential mouth area of the nozzle bore is in a preferred embodiment by a axially extending notch formed, which extends to the drain connection rejuvenates and becomes flatter, so that the effective diameter of the nozzle bore with increasing stroke of the control spool (control inflow) becomes smaller.
- the invention can be particularly advantageous in a control arrangement with variable pump and with lowering brake valve apply.
- FIG. 1 shows a highly simplified circuit diagram a hydraulic control arrangement 1 according to the invention, about which a hydraulic consumer, for example a lifting cylinder 2 of a mobile implement, via the for example a main arm of a construction site vehicle supported is controllable.
- the lifting cylinder 2 will supplied with pressure medium by a variable displacement pump 4, the pressure medium flow between this and the lifting cylinder 2 is controlled by an LS directional control valve 6.
- the basic structure such a LS directional control valve 1 is from the DE 197 15 020 A1 discussed at the outset.
- the Proportionally adjustable directional valve 6 controls the Pressure medium flow between the variable displacement pump and the consumer (Lifting cylinder 2) and a tank T.
- a hydraulic consumer for example a lifting cylinder 2 of a mobile implement
- the illustrated embodiment is for simplicity only one position of the directional control valve 6 is shown, in which an annular space 8 of the lifting cylinder 2 via an inlet line 10 connected to a working port A. is.
- a bottom-side cylinder chamber 12 of the lifting cylinder 2 is via a drain line 14 with a working connection B connected, which in turn via the directional part of the Directional control valve 6 is connected to the tank T.
- This reporting pressure is on the Control line 22 tapped at a control channel 24, the 1 between a region of the pressure medium flow path upstream of the inlet orifice 16 and extends upstream of the outlet orifice 18.
- in the Control channel 24 is a pressure divider with a fixed one Arranged nozzle 26 and an adjustable nozzle 28, the control line 22 between these two nozzles Branches 26, 28.
- the adjustable nozzle 28 is the discharge side (Low pressure) and the fixed nozzle 26 of the inlet side Assigned (high pressure).
- the adjustable nozzle 28 can be adjusted from the position of the LS directional control valve, more precisely depending on the setting of the speed section and thus the opening cross section of the orifice plates 16 and 18 vary.
- the pressure in the control line 22 is at the inlet an LS shuttle valve 30, the output of which to the control valve 32 of the variable displacement pump 4 is guided.
- the other The input of the shuttle valve 30 is to an LS signal line 34 connected via which the highest of the load pressures other consumers of the mobile work device to the shuttle valve 30 is performed. That is, the output of the Variable pump 4 is dependent on the highest load pressure or controlled by the signal pressure in the control line 22. In the present embodiment it is assumed that this reporting pressure is higher than the highest of the Load pressures in the LS signal line 34 is.
- the lifting cylinder 2 is for supporting a pushing Load provided.
- An uncontrolled lowering of this To prevent load, the lifting cylinder 2 is a lowering brake valve 36 assigned.
- This lowering brake valve is in the Basically, a check valve that is through a Back pressure, in the present case by the pressure in the Unlock inlet line 10 and into an open position can bring so that the pressure medium from the cylinder space 12 can flow out via the drain line 14.
- the A special feature of the invention is that the Pressure compensator 20 effective control pressure in the opening direction and possibly also the pressure for regulating the variable displacement pump 4 not - as in the stand described at the beginning the technology - tapped downstream of the inlet orifice 16 but on the pressure divider through the nozzles 26, 28 is formed.
- This pressure is below the Pressure upstream of the metering orifice 16 and depending Setting the nozzle 28- above the pressure in the drain upstream of the outlet orifice plate 18. It was shown that this pressure is much less sensitive to opening and closing movements of the lowering brake valve is so that the susceptibility to vibration compared to conventional Solutions is significantly improved.
- the measuring orifices 16, 18 are in the inflow respectively arranged in the process.
- the control channel 24 connects the in each case upstream of the orifices 16, 18 pressure medium paths with each other and contains the fixed nozzle 26 as well as the adjustable nozzle 28 the control line 22 tapped between this pressure divider. This corresponding pressure is also in an LS line reported.
- the control slide is used to extend the lifting cylinder 38 to the right in the illustration according to FIG. 2 moved so that the pressure port P with the working port B and the working connection A with the tank connection T is connected.
- the load pressure at the working connection B is tapped via a nozzle 40 and to Control connection S led.
- This nozzle 40 is in the following described solution formed by the nozzle 28.
- FIG. 3 shows a section of a directional valve 6, with the circuit symbol shown in Figure 2 is realized.
- the directional control valve 6 has a valve housing 42 in which the Control spool 38 is guided axially. This is about a centering spring arrangement, not shown in the basic position shown in Figure 3 (see also Figure 2) biased.
- the connections P, T, A, B and the LS or S connection On the valve housing 42, the connections P, T, A, B and the LS or S connection.
- the valve housing 42 is in the axial direction of a valve bore 44 enforced in the area of the aforementioned connections Annular spaces 46, 48, 50, 52, 54 and 56 are formed are.
- the annulus 46 and two adjacent annuli 58, 60 are the LS connection, the two annular spaces 48, 56 the tank connection T, the annular space 50 the working connection A, the annulus 54 the working port B and the annulus 52 assigned to the pressure port P, that is, in the pressure spaces formed by the annular spaces such as the pressure at the assigned port.
- the control slide 38 has a central annular groove 62, that is bounded by two neighboring control gangs 64, 66 is.
- two ring collars 68, 70 are arranged between which remains a radially recessed circumferential groove 72.
- a guide collar 66 is provided which over a further circumferential groove 78 is spaced from the control collar 66.
- control edges 80, 82 of the control collar 66 as well a control edge 84, 86 of the control collar 64 and the Ring collars 68 are formed axially extending control notches via which a connection to the neighboring pressure room is gradually taxable.
- the control slide 38 has an axial bore which Control channel 24 forms. This axially extending control channel 24 is de in the right end face Control slide 38 screwed screw plug 88 cordoned off on one side. The one from the screw plug 88 adjacent end section ends in a radial bore 90, that on the outer circumference of the circumferential groove 72 of the control slide 38 opens and thus a connection between the LS connection and the control channel.
- Diagonal control oil feed holes 92 are formed, which on the one hand in the control channel 24 and on the other hand in Outer peripheral area of the control collar 66 between two neighboring tax notches open. That is, in the in Figure 3 shown basic position of the spool 38 are the mouth areas of the inlet bores 92 shut off. According to Figure 3, the mouth area is the Inlet bores 92 with a relatively small axial distance Control edge 80 formed.
- the control slide is used to lower the lifting cylinder 2 38 to the left in a position corresponding to FIG. 4 postponed.
- the control edge 84 with the assigned control notches the connection from the pressure connection P open to work port A while over the control edge 82 with the associated control notches the connection from the working connection B to the tank connection T is controlled.
- the one controlled by the control edge 84 Cross section corresponds to the effective cross section of the Inlet orifice 16.
- the control oil supply hole 92 has a constant cross-section in the sink operating state, while the nozzle bores 24 with the notches 96 have a cross-section that depends on the stroke, increasing stroke decreased.
- the adjustable nozzle 28 educated.
- These two nozzles 26, 28 form one Pressure divider, the adjusting between them Pressure via the control channel 24, the radial bore 90 and tapped the LS connection and to the LS shuttle valves or to the pressure compensator 20 and the control valve 32 Variable pump is guided.
- the effective cross section of the adjustable nozzle 28 Nozzle bores 94, notches 96
- the control oil in Control channel pent up and thus a higher pressure in the Control line 22 reported, so with accordingly increasing slide stroke the pressure in the inlet is increased.
- the control slide is used to extend the lifting cylinder 2 from the basic position to one shown in FIG Move to the right in the position indicated by the Control edge 80 with the associated control notches Connection from pressure port P to working port B is controlled.
- the winding cross-section remains at these positions the radial bores 90 are closed, while the nozzle bores 94 and the notches 96 for Working port B are fully open.
- the in Figure 5 right, connected to the tank port T annulus 56 is through the control edge 82 to the working connection B directed towards. Accordingly, pressure medium from the pressure connection P above the working port B into the cylinder space 12 of the lifting cylinder 2 flow, while that from the Annulus displaced pressure medium 8 via the working connection A to the tank connection T.
- the pressure at the working connection B is via the controlled nozzle bore 94, the control channel 24, the radial bore 90, the annular space 60 and the annulus 46 tapped and to the LS (S) connection reported.
- the control of the variable pump 4 then takes place depending on this pressure at the working connection B.
- the one controlled by the control edge 80 Cross section corresponds to the effective cross section of the Drainage orifice 18.
- the solution according to the invention is characterized by a very simple structure, compared to the beginning described prior art according to DE 197 15 020 A1 the channel guide within the control slide is simplified.
- the pressure compensator is controlled by a control pressure in the opening direction acted on, which tapped on a control channel is that between the downstream of the metering orifice and the drainage orifice located sections extends.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
Description
- 1
- Steueranordnung
- 2
- Hubzylinder
- 4
- Verstellpumpe
- 6
- LS-Wegeventil
- 8
- Ringraum
- 10
- Zulaufleitung
- 12
- Zylinderraum
- 14
- Ablaufleitung
- 16
- Zulaufmessblende
- 18
- Ablaufmessblende
- 20
- Druckwaage
- 22
- Steuerleistung
- 24
- Steuerkanal
- 26
- Düse
- 28
- verstellbare Düse
- 30
- LS-Wechselventil
- 32
- Regelventil
- 34
- LS-Meldeleitung
- 36
- Senkbremsventil
- 38
- Steuerschieber
- 42
- Ventilgehäuse
- 44
- Ventilbohrung
- 46
- Ringraum
- 48
- Ringraum
- 50
- Ringraum
- 52
- Ringraum
- 54
- Ringraum
- 56
- Ringraum
- 58
- Ringraum
- 60
- Ringraum
- 62
- Ringnut
- 64
- Steuerbund
- 66
- Steuerbund
- 68
- Ringbund
- 70
- Ringbund
- 72
- Nut
- 74
- Umfangsnut
- 76
- Führungsbund
- 78
- Umfangsnut
- 80
- Steuerkante
- 82
- Steuerkante
- 84
- Steuerkante
- 86
- Steuerkante
- 88
- Verschlussschraube
- 90
- Radialbohrung
- 92
- Steueröl-Zulaufbohrungen
- 94
- Düsenbohrungen
- 96
- Kerbe
Claims (10)
- Hydraulische Steueranordnung zur Ansteuerung eines Verbrauchers, mit zwei in einem Druckmittelzulauf und in einem Druckmittelablauf angeordneten verstellbaren Messblenden (16, 18), wobei zumindest der Zulaufmessblende (16) eine Druckwaage (20) zugeordnet ist, die in Schließrichtung von einem Druck stromaufwärts der Zulaufmessblende und in Öffnungsrichtung von einem niedrigeren Meldedruck und der Kraft einer Feder beaufschlagt ist, dadurch kennzeichnend, dass der Meldedruck an einem Steuerkanal (24) abgegriffen ist, der stromaufwärts der Messblenden (16, 18) gelegene Abschnitte des Druckmittelzulaufs und des Druckmittelablaufs miteinander verbindet.
- Steueranordnung nach Patentanspruch 1 wobei im Ablauf ein Senkbremsventil (36) geschaltet ist, das vom Druck im Zulauf entsperrbar ist.
- Steueranordnung nach Patentsanspruch 1 oder 2, wobei im Steuerkanal (24) eine feste Düse (22) und eine verstellbare Düse (28) in Reihe geschaltet sind und der Meldedruck zwischen den Düsen (26, 28) abgegriffen ist.
- Steueranordnung nach Patentanspruch 3, wobei die verstellbare Düse (28) in Abhängigkeit von der Einstellung der Messblenden (16, 18) einstellbar ist.
- Steueranordnung nach Patentanspruch 4, wobei die Messblenden (16, 18) durch einen Geschwindigkeitsteil eines proportional verstellbaren LS-Wegeventils (6) gebildet sind und der Steuerkanal (24) mit den Düsen (26,28) vorzugsweise in einen Steuerschieber (38) des Wegeventils (6) integriert ist.
- Steueranordnung nach Patentanspruch 5, wobei der Steuerschieber (38) eine etwa zentrale Ringnut (62) hat, die im Bereich eines Druckanschlusses (P) des Wegeventils (6) angeordnet ist und durch deren Verschiebung eine Verbindung zu einem Zulauf oder einem Rücklauf des Verbrauchers aufsteuerbar ist.
- Steueranordnung nach Patentanspruch 6, wobei in einem dem Rücklauf zugeordneten, sich an die Ringnut anschließenden Steuerbund (66) eine radiale Düsenbohrung (94) vorgesehen ist, deren Steueröl-Ablaufquerschnitt beim Aufsteuern der Zulauf-Messblende (16) verringerbar ist und der in einer Axialbohrung des Steuerschiebers (38) mündet, die mittels einer Steueröl-Zulaufbohrung (92) des Steuerschiebers (38) mit einem stromabwärts der Zulaufmessblende (16) angeordneten, mit dem Druckanschluss (P) verbundenen Druckraum (52) verbunden ist, und die zu einem LS-Anschluss zum Abgreifen des Meldedrucks führt.
- Steueranordnung nach Patentanspruch 7, wobei die Zulaufbohrungen (92) zwischen den Düsenbohrungen (94) und der Ringnut (62) am Steuerbund (66) ausgebildet ist.
- Steueranordnung nach Patentanspruch 7 oder 8, wobei die Düsenbohrungen (94) jeweils einen Radialbohrungsabschnitt haben, der in einem breiten Endabschnitt einer axial verlaufenden Kerbe (96) mündet, die sich weg von der Ringnut (62) verjüngt und verflacht.
- Steueranordnung nach einem der vorhergehenden Patentansprüche, gekennzeichnet durch eine Verstellpumpe (4), die über den Meldedruck ansteuerbar ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10308484A DE10308484A1 (de) | 2003-02-26 | 2003-02-26 | Hydraulische Steueranordnung |
| DE10308484 | 2003-02-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1452744A1 true EP1452744A1 (de) | 2004-09-01 |
| EP1452744B1 EP1452744B1 (de) | 2007-02-21 |
Family
ID=32748079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04004260A Expired - Lifetime EP1452744B1 (de) | 2003-02-26 | 2004-02-25 | Hydraulische Steueranordnung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1452744B1 (de) |
| AT (1) | ATE354734T1 (de) |
| DE (2) | DE10308484A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1701042A3 (de) * | 2005-03-11 | 2007-03-14 | Bosch Rexroth AG | Hydraulische Steueranordnung |
| WO2008025396A1 (de) * | 2006-08-28 | 2008-03-06 | Robert Bosch Gmbh | Ls-steueranordnung |
| EP2222964A1 (de) * | 2007-11-19 | 2010-09-01 | Robert Bosch GmbH | Hydraulische steueranordnung und wegeventilsektion |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014208825A1 (de) * | 2014-05-12 | 2015-11-12 | Robert Bosch Gmbh | Steueranordnung |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3436246A1 (de) * | 1984-10-03 | 1986-04-03 | Danfoss A/S, Nordborg | Steuereinrichtung fuer einen hydraulisch betriebenen verbraucher |
| US5203678A (en) * | 1990-01-11 | 1993-04-20 | Hitachi Construction Machinery Co., Ltd. | Valve apparatus and hydraulic drive system |
| DE4241846A1 (de) * | 1992-12-11 | 1994-06-16 | Danfoss As | Hydraulisches System |
| DE19800721A1 (de) * | 1998-01-12 | 1999-07-15 | Danfoss As | Steuervorrichtung für einen hydraulischen Motor |
-
2003
- 2003-02-26 DE DE10308484A patent/DE10308484A1/de not_active Withdrawn
-
2004
- 2004-02-25 DE DE502004002931T patent/DE502004002931D1/de not_active Expired - Lifetime
- 2004-02-25 EP EP04004260A patent/EP1452744B1/de not_active Expired - Lifetime
- 2004-02-25 AT AT04004260T patent/ATE354734T1/de not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3436246A1 (de) * | 1984-10-03 | 1986-04-03 | Danfoss A/S, Nordborg | Steuereinrichtung fuer einen hydraulisch betriebenen verbraucher |
| US5203678A (en) * | 1990-01-11 | 1993-04-20 | Hitachi Construction Machinery Co., Ltd. | Valve apparatus and hydraulic drive system |
| DE4241846A1 (de) * | 1992-12-11 | 1994-06-16 | Danfoss As | Hydraulisches System |
| DE19800721A1 (de) * | 1998-01-12 | 1999-07-15 | Danfoss As | Steuervorrichtung für einen hydraulischen Motor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1701042A3 (de) * | 2005-03-11 | 2007-03-14 | Bosch Rexroth AG | Hydraulische Steueranordnung |
| US7219591B2 (en) | 2005-03-11 | 2007-05-22 | Bosch Rexroth Ag | Hydraulic control arrangement |
| WO2008025396A1 (de) * | 2006-08-28 | 2008-03-06 | Robert Bosch Gmbh | Ls-steueranordnung |
| US20100236397A1 (en) * | 2006-08-28 | 2010-09-23 | Armin Stellwagen | Ls control system |
| US8356545B2 (en) | 2006-08-28 | 2013-01-22 | Robert Bosch Gmbh | Load-sensing (LS) control system |
| CN101542134B (zh) * | 2006-08-28 | 2013-05-29 | 罗伯特.博世有限公司 | Ls-控制装置 |
| EP2222964A1 (de) * | 2007-11-19 | 2010-09-01 | Robert Bosch GmbH | Hydraulische steueranordnung und wegeventilsektion |
| US20100300086A1 (en) * | 2007-11-19 | 2010-12-02 | Robert Bosch Gmbh | Hydraulic control arrangement and distribution valve section |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE354734T1 (de) | 2007-03-15 |
| DE10308484A1 (de) | 2004-09-09 |
| EP1452744B1 (de) | 2007-02-21 |
| DE502004002931D1 (de) | 2007-04-05 |
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