EP3625457A1 - Dispositif de commande servant à alimenter au moins un consommateur hydraulique en fluide - Google Patents

Dispositif de commande servant à alimenter au moins un consommateur hydraulique en fluide

Info

Publication number
EP3625457A1
EP3625457A1 EP18722442.3A EP18722442A EP3625457A1 EP 3625457 A1 EP3625457 A1 EP 3625457A1 EP 18722442 A EP18722442 A EP 18722442A EP 3625457 A1 EP3625457 A1 EP 3625457A1
Authority
EP
European Patent Office
Prior art keywords
valve
control device
control
displacement pump
pressure
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
Application number
EP18722442.3A
Other languages
German (de)
English (en)
Other versions
EP3625457C0 (fr
EP3625457B1 (fr
Inventor
Heinz-Peter Huth
Marc Anton
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.)
Hydac Systems and Services GmbH
Original Assignee
Hydac Systems and Services GmbH
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 Hydac Systems and Services GmbH filed Critical Hydac Systems and Services GmbH
Publication of EP3625457A1 publication Critical patent/EP3625457A1/fr
Application granted granted Critical
Publication of EP3625457C0 publication Critical patent/EP3625457C0/fr
Publication of EP3625457B1 publication Critical patent/EP3625457B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F04B49/106—Responsive to pumped volume
    • 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
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable 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
    • 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
    • F15B2211/265—Control of multiple pressure sources
    • F15B2211/2654—Control of multiple pressure sources one or more pressure sources having priority
    • 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
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open 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
    • F15B2211/40—Flow control
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line

Definitions

  • the invention relates to a control device for supplying at least one hydraulic consumer with fluid with a controllable by means of a load-sensing pressure Verstel lpumpe.
  • Load-sensing systems that make it possible to adapt the pressure and / or volume flow of a hydraulic pump to the conditions demanded by the consumer are state of the art, see “Wikipedia, The Free Encyclopedia", Chapter Load Sensing Known as a so-called open-center system with fixed displacement pumps or as a so-called. Closed-center system with Verstel lpumpen be executed, as is the case of the above-mentioned, the subject of the application forming control device of Fal l.
  • systems such as farm implements or tillage implements typically include a plurality of hydraulic consumers, such as propulsion, power steering, hoist drives, and the like
  • Such equipment is not all the vorha during predominant operating phases at the same time to supply the consumer with a volumetric flow rate, so that, for reasons of cost, for example, it is possible to dispense with the usual chhold designed as a swing pump variable displacement pump designed for a maximum case resulting flow. If special or extreme work situations occur, for example when using a tractor for fieldwork, it may possibly lead to an undersupply in the maneuvers at the field end, where in addition to the travel drive the steering and machining units with lifting drive simultaneously request the maximum flow.
  • the invention has the object to provide a control device of the type mentioned, which allows a particularly reliable supply of hydraulic consumers.
  • a significant feature of the invention is that is forwarded for a case-by-case increase in the flow in the inlet of the hydraulic load load sensing pressure via a control line to a control device, which makes the increase in the inlet by connecting a constant displacement pump as soon as an operator causes the pertinent function by operating the control device.
  • the invention provides for extreme work situations not only a kind of boost function available, but at the same time provides a safeguard against a possible risk to occupational safety available, as it can be caused by an abrupt change in performance when switching the constant displacement pump.
  • the fact that the increase in the incoming volumetric flow is dependent on the operation of the control device to be performed by the operator avoids the risk of changes in the power not predicted by the operator, such as changes in the steering control. accelerated travel or lifting movements, because the boost function can only be initiated by the operator.
  • the control device can advantageously have a first and a second control valve, of which the first control valve of the load sensing pressure in the control line and the second control valve can be controlled by the operator.
  • the first valve is a Proportio- nalventil, in particular a 2/2-way proportional valve, on its one control side next to a spring preload with the load sensing pressure and on its other control side with the inlet pressure in the inlet of the respective hydraulic consumer is charged.
  • an electromagnetically actuated switching valve in particular a 2/2-way switching valve is provided, which releases a fluid path from the constant displacement pump to a storage tank in its unactuated Stel and treatment in his actuated by the operator Stel development blocks the pertinent fluid path, so that in this actuated state, the volume flow of the fixed displacement pump to increase the inlet is available.
  • the second valve can form a bypass to the first valve by the input and the output of the first valve is fluid-conductively connected to the input or the output of the second valve.
  • the output of the constant pump can in this case be connected via a branch Stel le to the input of the first and the second valve.
  • a branch Stel le to the input of the first and the second valve.
  • a check valve is connected, in particular in the form of a spring-loaded check valve which opens in the direction of the variable displacement pump and closes in the direction of the constant pump.
  • variable displacement pump In the connection between the variable displacement pump and the respective hydraulic consumer can first be connected to the connecting line with the check valve and subsequently a control line which acts on the first valve with the inlet pressure.
  • a pressure limiting valve is connected in parallel to the second control valve in a bypass line, in the response of which the volume flow of the constant pump is forwarded to the storage tank, bypassing the first and second valves.
  • FIG. 1 shows a symbol view of the circuit of the embodiment of the control device according to the invention, wherein the operating state is shown without LSD signal request and in the case of non-actuated control device;
  • Fig. 2 is a representation of Fig. 1 corresponding presen- tation, wherein the operating state is dargestel at mechanicalseldendem LS signal and not actuated control device;
  • FIG. 3 is a FIGS. 1 and 2 corresponding presen- tation, wherein the
  • FIG. 4 is a representation corresponding to FIGS. 1 to 3, wherein the
  • Operating state dargestel is when legitimacy LS signal and actuated control device is.
  • the control device has a control device, designated in the figures by 2, whose components are combined to form a control block 4.
  • the control block 4 has a first input port 6, which is in communication with the output 8 of a variable displacement pump in the form of a pivoting pump 1 0, which is connected on the input side to a storage tank 1 2.
  • a second input terminal 1 3 of the control block 4 is connected to the output 14 of a constant-displacement pump 1 6, which, like the pivoting pump 1 0, is motor-driven and connected on the input side to the storage tank 1 2.
  • the constant displacement pump 1 6 is formed in the vorl example according to example by a gear pump.
  • a third input port 1 8 of the control block 4 can be supplied with a demand signal LS signal, more precisely, when there are several consumers to be supplied, the respective highest occurring LS signal is supplied via shuttle valves.
  • a first output port 20 on the control block 4 leads to the consumer inlet 22, and a second outlet port 24 leads to the storage tank 1 second
  • the swivel pump 10 is part of a closed-center system, which, incidentally, is not illustrated, so that the swivel angle is set via a pressure regulator DR in accordance with the LS signal.
  • the dargestel in the dargestel in Figs. 1 to 4 under defencel show Ien operating conditions, which are the oil flow respectively leading lines with larger line thickness knowl I made.
  • a supply line 26 is designated, which leads from the first input terminal 6 to the first output terminal 20 and thus to the inlet 22.
  • a control line, which supplies the LS pressure from the third input port 18 to the control device 2 is denoted by 28.
  • the control block 4 includes a first control valve 30 and a second control valve 32, of which the first valve 30 is a 2/2-way proportional valve and the second valve 32 is a 2/2-way switching valve. The latter is actuated by an operator, electromagnetically actuated, it ment against the force of a remindstel 34 from an unactuated switch Stel, which corresponds to the flow Stel development in an actuated switch Stel is engageable, in which the valve 32 is locked.
  • FIG. 1 shows an operating state in which the second valve 32 is in the unactuated switching position, that is to say the passage position. Regardless of the valve position of the first valve 30 is therefore, as mentioned, the volume flow of the fixed displacement pump 1 6 derived from the branch point 40 forth to the tank.
  • the first valve 30 via line 38 is also not loaded with a demand-reporting LS pressure.
  • the first valve 30, which forms the pressure compensator of an open-center system together with the fixed displacement pump 16, is therefore controlled by the pressure prevailing in the control line 38 supply pressure of the swing pump 10 against the action of the compression spring 36 from the locked position, so that in this state also via the output 54 of the first valve 30, a fluid path to the tank is formed.
  • this oil flow is illustrated with drawn in greater thickness lines.
  • the second valve 32 is switched to the blocking state on the part of the operator, so that no discharge of the volume of the constant displacement pump 16 takes place via this valve 32.
  • no LS pressure acts on the first valve 30 via the control line 28, which is sufficient to control the first valve 30 against the supply pressure acting on the control line 38 into the blocking position, so that the proportional valve 30 allows a flow to the tank , Despite actuated second valve 32, therefore, no boost function is triggered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne un dispositif de commande servant à alimenter au moins un consommateur hydraulique en fluide, le dispositif de commande comprenant une pompe à cylindrée variable (10) pouvant être commandée au moyen d'une pression de détection de charge (LS). Le dispositif de commande est caractérisé en ce qu'en cas d'augmentation occasionnelle du débit volumique dans l'alimentation (22) du consommateur hydraulique, la pression de détection de charge (LS) est transmise à un dispositif de commande (2) par le biais d'une conduite de commande (28), lequel dispositif de commande effectue l'augmentation dans l'alimentation (22) par mise en service d'une pompe à cylindrée constante (16) dès qu'un opérateur déclenche la fonction en ce sens par actionnement du dispositif de commande (2).
EP18722442.3A 2017-05-15 2018-04-27 Dispositif de contrôle de l'approvisionnement d'au moins un consommateur hydraulique avec fluide Active EP3625457B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017004634.4A DE102017004634A1 (de) 2017-05-15 2017-05-15 Steuervorrichtung zum Versorgen mindestens eines hydraulischen Verbrauchers
PCT/EP2018/060866 WO2018210550A1 (fr) 2017-05-15 2018-04-27 Dispositif de commande servant à alimenter au moins un consommateur hydraulique en fluide

Publications (3)

Publication Number Publication Date
EP3625457A1 true EP3625457A1 (fr) 2020-03-25
EP3625457C0 EP3625457C0 (fr) 2023-12-06
EP3625457B1 EP3625457B1 (fr) 2023-12-06

Family

ID=62116405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18722442.3A Active EP3625457B1 (fr) 2017-05-15 2018-04-27 Dispositif de contrôle de l'approvisionnement d'au moins un consommateur hydraulique avec fluide

Country Status (6)

Country Link
US (1) US11168710B2 (fr)
EP (1) EP3625457B1 (fr)
JP (1) JP7130662B2 (fr)
CN (1) CN211448991U (fr)
DE (1) DE102017004634A1 (fr)
WO (1) WO2018210550A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3633188B1 (fr) * 2018-10-02 2021-07-14 Siemens Gamesa Renewable Energy A/S Circuit hydraulique à débit variable pour une éolienne
CN113266615B (zh) * 2021-06-23 2024-12-03 安百拓（南京）建筑矿山设备有限公司 集成控制阀及牙轮钻机钢丝绳张紧液压系统
DE102021130272A1 (de) * 2021-11-19 2023-05-25 Still Gesellschaft Mit Beschränkter Haftung Hydrauliksystem für ein Flurförderzeug
CN116104824A (zh) * 2023-01-29 2023-05-12 佛山市恒力泰机械有限公司 一种用于挤压设备的供油系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559965A (en) * 1984-01-09 1985-12-24 J. I. Case Company Multiple compensating unloading valve circuit
DE4129508C2 (de) * 1991-09-05 1994-12-15 Rexroth Mannesmann Gmbh Ventilanordnung zur Versorgung eines Verbrauchers aus zwei Druckmittelquellen
JPH10266274A (ja) * 1997-03-27 1998-10-06 Hitachi Constr Mach Co Ltd 建設機械の油圧回路装置
JPH11115780A (ja) * 1997-10-15 1999-04-27 Komatsu Ltd 作業車両用ステアリングポンプの容量制御方法および装置
DE19906689A1 (de) * 1999-02-18 2000-08-24 Krupp Foerdertechnik Gmbh Hydraulikantrieb für Schwimmbagger
US6901754B2 (en) * 2003-10-01 2005-06-07 Husco International, Inc. Power conserving hydraulic pump bypass compensator circuit
JP2013044398A (ja) * 2011-08-24 2013-03-04 Komatsu Ltd 油圧駆動システム
GB201209109D0 (en) * 2012-05-24 2012-07-04 Agco Int Gmbh Pilot pressure supply system
DE102012209142A1 (de) 2012-05-31 2013-12-05 Putzmeister Engineering Gmbh Hydrauliksystem
DE102012011400A1 (de) * 2012-06-08 2013-12-12 Hydac System Gmbh Hydrauliksystem zur sicheren Druckversorgung mindestens eines Verbrauchers
DE102014004932B3 (de) * 2014-04-05 2015-05-13 Hydac Fluidtechnik Gmbh Schaltungsanordnung

Also Published As

Publication number Publication date
DE102017004634A1 (de) 2018-11-15
JP7130662B2 (ja) 2022-09-05
EP3625457C0 (fr) 2023-12-06
CN211448991U (zh) 2020-09-08
US11168710B2 (en) 2021-11-09
JP2020519815A (ja) 2020-07-02
US20200095987A1 (en) 2020-03-26
EP3625457B1 (fr) 2023-12-06
WO2018210550A1 (fr) 2018-11-22

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