EP2669527A2 - Bloc de commande hydraulique et système hydraulique - Google Patents

Bloc de commande hydraulique et système hydraulique Download PDF

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Publication number
EP2669527A2
EP2669527A2 EP20130001909 EP13001909A EP2669527A2 EP 2669527 A2 EP2669527 A2 EP 2669527A2 EP 20130001909 EP20130001909 EP 20130001909 EP 13001909 A EP13001909 A EP 13001909A EP 2669527 A2 EP2669527 A2 EP 2669527A2
Authority
EP
European Patent Office
Prior art keywords
valve
pump
control block
control
hydraulic
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.)
Withdrawn
Application number
EP20130001909
Other languages
German (de)
English (en)
Other versions
EP2669527A3 (fr
Inventor
Frank Helbling
Christoph Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr France SAS
Original Assignee
Liebherr France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liebherr France SAS filed Critical Liebherr France SAS
Publication of EP2669527A2 publication Critical patent/EP2669527A2/fr
Publication of EP2669527A3 publication Critical patent/EP2669527A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple 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
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87885—Sectional block structure

Definitions

  • the invention relates to a hydraulic control block for controlling at least two hydraulic consumers.
  • Hydraulic control blocks include an integrated hydraulic circuit. To the outside, the control block has various connections in order to be able to connect specific hydraulic components, for example hydraulic consumers or hydraulic pumps, to one another via the control block.
  • Control blocks are used in construction machines, in particular earthmoving machines or lifting devices, wherein the control block takes over the hydraulic control of at least part or all hydraulic consumers of the machine.
  • the control block takes over the hydraulic control of at least part or all hydraulic consumers of the machine.
  • it is known to provide such control blocks with more than one pump connection.
  • the integrated circuit design allows the summation of the pump delivery volumes. Due to the pump combination, the dimensioning of the individual pumps can be smaller, which can significantly reduce the manufacturing and operating costs.
  • the object of the present invention is to show a new modular concept for a hydraulic control block, which allows large pump flow rates and at the same time allows a particularly flexible pump-side summation of the flow rates.
  • a hydraulic control block comprises at least two pressure supply circuits, each having one or more hydraulic consumer connections. A part of the consumer connections is therefore fed by independent supply circuits.
  • the control block has at least two hydraulic pump connections.
  • control block has exactly two or three pump connections.
  • a valve arrangement is furthermore provided by means of which each of the at least two pump connections can be connected or connected to at least one pressure supply circuit individually or in combination with at least one other of the remaining pump connections.
  • each individual supply circuit can be fed through each pump connection or any pump connection combination. It is also conceivable for each of the at least two pump connections to be connectable in parallel, either individually or in combination with at least one of the remaining pump connections, to at least two or all pressure supply circuits.
  • valve assembly allows a particularly flexible pump-side summation of the pump delivery streams. If required, the hydraulic control block can supply particularly large volume flows to each of the connected consumers deliver. In addition, the invention also realizes a particularly high-quality system under safety aspects, since individual consumers have no consumer-side summation of the pump delivery flows and thus the number of controls is reduced.
  • At least one direct connection of a consumer connection per pump connection is provided.
  • the direct connection can be used to prioritize specific consumer connections or consumers in the hydraulic system.
  • at least two consumers may be prioritized.
  • the prioritization allows a preferred volume flow to the consumer.
  • An extended version with at least three pump connections thus allows the prioritization of at least three consumers.
  • valve arrangement comprises at least four valves.
  • a suitable type of valve proves, for example, a directional control valve. At least two or all valves may be identical or unequal.
  • each pump connection can be connected to the pressure supply circuits via at least two valves.
  • the switching state of the at least two valves selects the pressure supply circuit to be supplied.
  • Such a valve arrangement allows a particularly flexible control, since each of the pressure supply circuits can be selectively fed by exactly one of the connected pumps.
  • this valve arrangement allows any pump summation two or more pump ports for feeding at least one or more pressure supply circuits.
  • At least one valve of the valve assembly may be a black / white or proportional valve, a piston valve, a cartridge-style logic valve, a flow control valve, or a pressure relief valve. It is possible a similar or different construction of the individual valves.
  • the individual consumer connections of the respective pressure supply circuits are preferably connected to the pressure supply circuit via at least one control valve.
  • the control valve in particular a control piston, is used for consumer control, that is to activate, deactivate or control the connected consumers.
  • one or more of the consumer connections connected directly to the pump connection are connected to the pump connection via at least one control valve, in particular a control piston.
  • At least one of the control valves used for the consumer connections of the pressure supply circuits or the directly connected consumer connections for example, a 6/3-way valve, a 4/3-way valve, a combination of logic valves with or without flow control function or a directional control valve with or be downstream pressure balance.
  • each pump connection has at least one parallel shutdown path.
  • the pump flow can be fed directly into a hydraulic tank via the shutdown path.
  • the shutdown path is preferably controlled via a directional control valve.
  • the closed state allows pressure build-up in the entire hydraulic system, in particular in the pressure supply circuits or the direct connections. If the directional valve is opened in contrast, the system pressure in the circuit begins to decrease and the delivery volume of the respective pump is conveyed directly into the tank.
  • Conceivable valve types for the arrangement in the Abschaltpfad are in particular a black / white or proportional valve, a piston valve, a valve-type logic valve, a flow control valve or a pressure relief valve.
  • At least one consumer connection of the pressure supply circuit is additionally indirectly connected via at least one valve to at least one direct connection of at least one pump connection. This design allows the prioritization of at least one additional hydraulic consumer via the additional supply line.
  • the invention further relates to a hydraulic system with at least one control block according to the invention or an advantageous embodiment of the control block.
  • the advantages and properties of the hydraulic system corresponding obviously those of the control block according to the invention, which is why at this point a repetitive description is omitted.
  • the hydraulic system comprises in addition to the control block at least two hydraulic pumps and a plurality of hydraulic consumers, which are each connected to the corresponding terminals of the control block.
  • the hydraulic system according to the invention is used for the hydraulic drive of a construction machine, in particular a hoist, transport device or an earthmoving machine.
  • One or more hydraulic consumers represent, for example, a piston-cylinder unit, another actuator for operating a spoon, jib, handle or a similar option.
  • one or more hydraulic consumers comprise a hydraulic drive, for example a hydraulic motor, for moving the device resp of the machine or for execution another machine movement, for example for driving a slewing gear.
  • FIG. 1 shows a first variant of the control block or system according to the invention, which is designed as a two-circuit system and the two pumps P1, P2 comprises.
  • the control block has a right supply channel 10, to which the consumers A and B are connected.
  • a further supply channel 20 is provided on the left side of the control block, to which the consumers C, D and E are connected.
  • the two pumps P1, P2 can now be connected either individually or together with one or both supply channels 10, 20 via a valve arrangement.
  • the valve arrangement consists essentially of the four valves 1 to 4.
  • the valves 1 to 4 are designed as 2/2-way valves with a flow and a blocking position, wherein the flow direction is always directed in the direction of the pressure supply circuits. In neutral position, the valves 1 and 4 are opened and the valves 2, 3 are closed, so that the pump P1 feeds the right supply circuit 10 and the pump P2 feeds the left supply circuit 20.
  • the consumers A - E can choose between pumps P1 or P2 or both in combination.
  • the valves 1 and 3 allow the pump summation the pumps P1, P2 to the supply channel 20 of the left half of the control block, while the valves 2 and 4, the pump summation of the pumps P1, P2 allow the supply channel 10 of the right half of the control block.
  • each of the two pumps P1, P2 feeds an associated consumer connection.
  • the connected consumer is driven with higher priority over the other consumers.
  • the consumer F is prioritized higher and coupled directly to pump P2.
  • the consumer G which is connected directly to the pump P1.
  • each consumer A to G is connected via a 4/3-way valve 13 to 19 either to one of the supply channels 10, 20 or directly to one of the pumps P1, P2.
  • Each 6/3-way valve has two flow positions, for example for forward / reverse operation of the load, and a locked position in which all valve connections are blocked. All directional valves 13 to 19 are locked in their neutral position.
  • valve arrangement 1 to 4 in combination with the direct connection of the consumers F and G allows a prioritization of the consumers F, G and a simultaneous parallel operation of the other consumers A to E.
  • valve 9 allows a bidirectional flow.
  • a volume flow of the pump P2 for direct connection of the pump P1 or to the consumer G and a volume flow of the pump P1 to the consumer E is possible. If the valve 9 is opened and valve 8 is closed, the pressure is supplied to the two consumers E, G by pump P1. Valve 9 is closed in neutral position while valve 8 is open.
  • the inventive control block according to the embodiment of FIG. 1 can be used in a hydraulic excavator and takes over the entire control of the hydraulic components used for the execution of the excavator functions.
  • the consumers E, G and B are, for example, hydraulic motors for the traction drive or for driving the superstructure, while the consumers A, C, D and F piston-cylinder units for operating the excavator handle, boom, spoon or any other hydraulic component.
  • the chassis operated via the hydraulic motor G is fed with prioritization via the pump P1.
  • another hydraulic motor is provided for operating the landing gear. If both consumers E, G are to be supplied for driving in parallel via both pumps P1, P2, both valves 8, 9 must be open.
  • valves 10, 11 is realized per pump P1, P2 a safety-relevant shutdown. In neutral position both valves 10, 11 are open. If the valves 10, 11 are closed, the volume flow of the pumps P1, P2 is regularly conveyed into the pressure supply circuits 10, 20 or to the higher-priority consumers F, G for pressure build-up. If necessary, the valves 10, 11 can be opened individually or in parallel in order to convey the delivery volume of the pumps P1, P2 directly into the connected tank.
  • pressure limiting valves 20, 21 for limiting the maximum permissible pressure build-up are connected directly to the pumps P1, P2.
  • this section can optionally be attached to the right or left half of the control block.
  • the pump summation of P1 and P2 can also be done here by valve 1 and 3 or 2 and 4.
  • FIG. 2 An extended version of the hydraulic system or control block according to the invention is the FIG. 2 refer to.
  • This illustration shows the structure of a three-circle system, in which case compared to the embodiment in FIG. 1 an additional pump P3 is integrated.
  • the consumer B is prioritized by being connected directly to the pump P3.
  • valve 7 must always be open. The opening of the valve 5 allows the supply of the volume flow of the pump P3 in the right supply channel 10, whereas valve 6 opens the access to the left supply channel 20.
  • the additional pump P3 similarly to the pumps P1, P2 also includes a parallel shutdown path with the valve 12 as a safety function and the pressure limiting valve 24.
  • All valves 1 to 12 in the FIGS. 1 and 2 can be designed as black / white or proportional valves, piston or logic valves in cartridge design. Depending on the functional arrangement, a design as a flow control valve or pressure relief valve may be conceivable.
  • these valves can each be designed as 6/3-way valves, 4/3-way valves, combination of logic valves with or without flow control function or directional valves with upstream or downstream pressure compensator.

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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)
  • Operation Control Of Excavators (AREA)
EP13001909.4A 2012-05-31 2013-04-12 Bloc de commande hydraulique et système hydraulique Withdrawn EP2669527A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210010847 DE102012010847A1 (de) 2012-05-31 2012-05-31 Hydraulischer Steuerblock und Hydrauliksystem

Publications (2)

Publication Number Publication Date
EP2669527A2 true EP2669527A2 (fr) 2013-12-04
EP2669527A3 EP2669527A3 (fr) 2017-03-08

Family

ID=48183982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13001909.4A Withdrawn EP2669527A3 (fr) 2012-05-31 2013-04-12 Bloc de commande hydraulique et système hydraulique

Country Status (5)

Country Link
US (1) US20130319561A1 (fr)
EP (1) EP2669527A3 (fr)
JP (1) JP2013249954A (fr)
CN (1) CN103486103A (fr)
DE (1) DE102012010847A1 (fr)

Cited By (1)

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CN109114048A (zh) * 2017-06-26 2019-01-01 刘素华 液压感应转换自动控制进退方法及液压感应转换自动进退控制系统

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US9889834B2 (en) * 2011-06-29 2018-02-13 Ford Global Technologies, Llc Hydraulic brake assist vacuum maintenance system and method
CN104088836A (zh) * 2014-07-06 2014-10-08 上海宏信设备工程有限公司 复合式斜锥自锁的液压冗余钢支撑轴力补偿系统
CN104088833A (zh) * 2014-07-06 2014-10-08 上海宏信设备工程有限公司 电源及液压冗余的斜锥自锁型轴力补偿系统
JP6541545B2 (ja) * 2015-10-16 2019-07-10 Ｋｙｂ株式会社 ロードセンシング回路とそのバルブ構造
GB201912665D0 (en) 2019-09-03 2019-10-16 Artemis Intelligent Power Ltd Hydraulic apparatus
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DE102019132845A1 (de) * 2019-12-03 2021-06-10 Danfoss Scotland Ltd. Weichenventilbock für eine hydraulisch betätigbare Arbeitsmaschine

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CN109114048A (zh) * 2017-06-26 2019-01-01 刘素华 液压感应转换自动控制进退方法及液压感应转换自动进退控制系统

Also Published As

Publication number Publication date
CN103486103A (zh) 2014-01-01
US20130319561A1 (en) 2013-12-05
JP2013249954A (ja) 2013-12-12
DE102012010847A1 (de) 2013-12-05
EP2669527A3 (fr) 2017-03-08

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