EP0587043B1 - Procédé et arrangement pour contrÔle et régulation d'un générateur de pression pour plusieurs utilisateurs différents et hydrauliques branchés en parallèle - Google Patents

Procédé et arrangement pour contrÔle et régulation d'un générateur de pression pour plusieurs utilisateurs différents et hydrauliques branchés en parallèle Download PDF

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Publication number
EP0587043B1
EP0587043B1 EP93114029A EP93114029A EP0587043B1 EP 0587043 B1 EP0587043 B1 EP 0587043B1 EP 93114029 A EP93114029 A EP 93114029A EP 93114029 A EP93114029 A EP 93114029A EP 0587043 B1 EP0587043 B1 EP 0587043B1
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EP
European Patent Office
Prior art keywords
pressure
input
users
envelope
flow generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93114029A
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German (de)
English (en)
Other versions
EP0587043A3 (fr
EP0587043A2 (fr
Inventor
Matthias Brandt
Roland Dr.-Ing. Wegmann
Oliver Grimm
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.)
HPM HEMSCHEIDT GMBH
Original Assignee
Hemscheidt Maschinentechnik Schwerin GmbH and Co
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 Hemscheidt Maschinentechnik Schwerin GmbH and Co filed Critical Hemscheidt Maschinentechnik Schwerin GmbH and Co
Publication of EP0587043A2 publication Critical patent/EP0587043A2/fr
Publication of EP0587043A3 publication Critical patent/EP0587043A3/fr
Application granted granted Critical
Publication of EP0587043B1 publication Critical patent/EP0587043B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump
    • 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
    • F15B2211/25—Pressure control functions
    • F15B2211/251—High 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6652—Control of the pressure source, e.g. control of the swash plate angle
    • 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
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6653—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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7135—Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
    • 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
    • F15B2211/75—Control of speed of the 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
    • F15B2211/70—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

Definitions

  • the invention relates to a method and a device to control and regulate a pressure generator z.
  • B. a variable displacement pump for several in parallel and in temporal overlay, different hydraulic Consumers in machine tools and processing machines with cyclically recurring workflows by the Pressure generator are supplied with pressure medium, whereby the pressure values for the respective consumers and the corresponding pressure setpoints for the pressure generator be specified by an input and arithmetic unit.
  • DE OS 3 943 357 is a generic one Circuit arrangement with control electronics for the magnetic coils of actuators of a hydraulic circuit known to several consumers.
  • the control of the actuators for consumers is done in conjunction with the Regulation of the variable pump for the flow. Process engineering it happens so that the electronic control only becomes effective when there is an increased power requirement the pump delivery quantity of the connected consumers is no longer sufficient to meet requirements.
  • the pump flow adapt to the respective need or by the maximum Limit of the possible flow rate not too the flow rate is exceeded with the help of the actuators or metered by the control pump. For that they have Actuators corresponding signal devices (signal pickups and signal generator), which is used as an input signal in the electronic Control go.
  • the aim of the invention is to control and regulating effort of hydraulic systems connected in parallel and superimposed over time Economically cheaper and in technically with less hydraulic effort To make controls more reliable.
  • the object of the invention is to provide a method and a control and control device for the pressure generator and for the to design parallel connected hydraulic consumers or train that in the operation of the consumer with minimal energy consumption no discontinuities and no indifferent States occur.
  • the method according to the invention enables various designs for control and regulation of parallel connected different hydraulic consumers. So can for a selected process engineering consumer, which is a comparatively high average energy requirement has a regulation of the pressure flow on the basis of pressure values determined by a pressure sensor, while the printing needs for other consumers after the Envelope is regulated.
  • the activation of a Proportional throttle valve s a constant adjustment of the current pressure value of the selected consumer at the input value the associated input and arithmetic unit. This pressure control always takes place when the specified pressure values of the other operated in parallel Consumers are lower than the current pressure value for is the selected consumer.
  • This pressure control can be used with the other consumers but also when these consumers stand still be performed.
  • the maximum operating pressure as pump pressure for the pressure generator be specified.
  • the actual pressure curve resulting from the respective Machine functions results in predetermined pressure and Time additions as an envelope by the input and arithmetic unit is determined and in the next following cycles is due the similarity of the processes running according to this Envelope controlled by pump pressure.
  • Method in the device for performing the invention is the input and arithmetic unit on the one hand with a first Control electronics connected to the pressure of the pressure generator controls and on the other hand with at least one second control electronics connected to the consumer controls.
  • the input and arithmetic unit is after input the pressure values and the on and off times of the individual consumers an envelope for the entire work cycle calculates that from the pressure generator specifies delivering pressure curve over time.
  • the pressure generator will be exactly the same at all times Ensured pressure requirement, which is made up of the number and the respective performance requirements of those in operation Consumer results.
  • the pressure generator is a variable displacement pump, whose pressure control device has a proportional pressure control valve is assigned, which is adjusted by the first control electronics becomes.
  • Another feature of the invention is that one selected consumers with high energy requirements a pressure transducer assigned, on the one hand with the input and computing unit and on the other hand via a proportional throttle valve, a third control electronics and a tachometer generator is connected to the selected consumer and its current pressure values constantly to the input values the input and arithmetic unit are adapted. This is for this consumer a pressure control deviating from the envelope possible if the pressure values of the others are parallel operated consumers are less than that of the pressure sensor measured pressure value.
  • a pressure generator z. B. a variable pump for several different hydraulic consumers connected in parallel should first use the example for the different Consumer of an injection molding machine for plastics processing to be viewed as.
  • the method according to the invention is however without problems on other processing machines or Machine tools transferable, where parallel operated consumers with different power requirements with pressure medium need to be supplied.
  • hydraulic circuit are controlled by a pressure Variable pump 1 from the consumer clamping unit 12, Injection unit 13 and the plasticizing drive 15 via a delivery line 1.1 and parallel line branches 1.2 with pressure medium provided.
  • the pressure p in the delivery line 1.1 is a parallel switched system safety valve 14 limited.
  • the consumers Closing unit 12 and injection unit 13 are over accordingly upstream valve technology 9 and 10, which as Proportional control valves or servo or proportional control valves can be executed, controlled.
  • the performance parameters for consumers 12 and 13 are about an input and computing unit 16, which with the valve technology 9 and 10 and a second control electronics 4.2 linked is specified.
  • the variable pump 1 According to the power requirements of individual hydraulic consumers connected in parallel is the variable pump 1, by a hydraulic pressure control unit 2 in a parallel line branch 1.3, adjustable. Via a downstream in line branch 1.3
  • Proportional pressure relief valve 3 is the set point the hydraulic pressure control unit 2 changeable. This variable set point determines the time at which the variable pressure pump 1 automatically should swivel in.
  • the proportional pressure relief valve 3 is with a first control electronics 4.1 for the variable displacement pump 1 linked and controlled by this.
  • the input- and computing unit 16 receives from a pressure sensor 5, the one with the parallel line branch 1.2 for the plasticizing drive 15 is connected to the actual pressure value.
  • the plasticizing drive 15 is selected procedural consumer considered and separately controlled and regulated. This is in parallel Line branch 1.2 in front of the plasticizing drive 15 Proportional throttle valve 8.
  • the pressure transducer 5 is over the proportional throttle valve 8, a third control electronics 7 and a tachometer generator 6 with the selected one Consumer plasticizing drive 15 electrically linked so that the speed of the plasticizing drive 15 on any preselectable value can be kept constant.
  • the third control electronics 7 receives the speed setpoint via an electrical line connection from the input and computing unit 16.
  • inventive Method for controlling and regulating a pressure generator for different hydraulic systems connected in parallel Consumers intend to add the sum of all partial flows to choose the individual consumers so that at parallel expiring machine functions the total flow of the Variable pump 1 is not reached and therefore the pressure level can be preselected as high as required.
  • the pressure setpoint of the variable pump 1 is not only about regulation by means of tachogenerator 6 and proportional throttle valve 8 kept constant, but takes place simultaneously a pressure-superimposed flow control via the pressure sensor 5 in connection with the proportional throttle valve 8.
  • the required pressure with the partial flow, depending results as required, is by the variable pump 1 on the Lines 1.1 and 1.2 provided.
  • 2 to 6 is the pressure curve p on the y-axis in diagrams and the cycle time t on the x-axis for a different one Number of parallel switched consumers labeled a, b, c, d, e and f are for a working or processing machine different performance parameters.
  • FIG. 3 shows in an analogous manner for six consumers a, b, c, d, e and f the pressure curve during a cycle evident.
  • the consumer d is the consumer, the one Much of the cycle time is claimed for itself. From the different Area representation of the individual consumers, which overlap in certain time periods can be seen which consumers at what time of the cycle in parallel operate.
  • the power consumption is on the time axis t of the consumer d through the time period t 1 to marked t 2.
  • t 1 For the consumer d, the one has special procedural priority
  • the pressure control always takes place when the Input values of the other consumers operated in parallel c and e are lower than the current pressure value.
  • the regulated pressure value p reg as a curve in the Period of t 1 and t 2 recognizable that below the The target pressure p target shown as a straight line runs.
  • This Variant has the advantage that over periods of the Overall cycle an energy saving through the adjusted Control pressure p reg is possible.
  • the 5 shows an embodiment variant with three consumers for process control and regulation illustrates, in which the specification of the The target pressure value p should be based on a decision table.
  • the first control electronics 4.1 the input values of the input and computing unit 16 and / or the actual pressure values of at least one pressure sensor 5 made a decision.
  • the decision becomes dependent the priority of the current function after a given decision table. That’s it possible that the pump pressure p via the proportional pressure relief valve 3 and the pressure control unit 2 can be predetermined. This adjustment enables an improved economic operation compared to the variants described so far.
  • From Figuar 6 is a control and regulation variant of the Invention removable, the highest from a technical point of view Has comfort.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Eletrric Generators (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (7)

  1. Procédé pour le contrôle et la régulation d'un générateur de pression (1), par exemple d'une pompe à cylindrée variable, pour plusieurs consommateurs hydrauliques (12, 13, 15) différents branchés en parallèle et fonctionnant en superposition temporelle dans des machines-outils et des machines d'usinage, avec des phases de travail se reproduisant de manière cyclique, qui sont alimentées en agent de pression par le générateur de pression (1), les valeurs de pression pour les consommateurs (12, 13, 15) et les valeurs de consigne de pression correspondantes pour le générateur de pression (1) étant prédéfinies par une unité d'entrée et de calcul (16), caractérisé en ce que l'unité d'entrée et de calcul (16) calcule, après l'entrée des valeurs de pression et des moments de mise en circuit et de coupure des différents consommateurs (12, 13, 15), une enveloppante pour l'ensemble du cycle de travail qui prédéfinit la loi de pression (Psoll) qui doit être donnée par le générateur de pression (1) pendant le temps si bien que le générateur de pression (1) garantit à tout moment exactement les besoins en pression qui résultent du nombre et des exigences de puissance respectives des consommateurs (12, 13, 15) qui se trouvent en service (fig. 5).
  2. Procédé selon la revendication 1 dans lequel, pour un consommateur technologique sélectionné (15) avec des besoins en énergie moyennement élevés, un réglage de la pression est effectué au moyen des valeurs de pression déterminées par un capteur de pression (5), tandis que les besoins en pression pour les autres consommateurs (12, 13) sont réglés selon l'enveloppante,
    caractérisé en ce que, par l'excitation d'une soupape d'étranglement proportionnelle (8), une adaptation permanente de la valeur de pression actuelle du consommateur sélectionné (15) à la valeur d'entrée de l'unité d'entrée et de calcul (16) est effectuée et que ce réglage de la pression se fait toujours lorsque les valeurs de pression prédéterminées des autres consommateurs fonctionnant en parallèle (12, 13) sont plus basses que la valeur de pression actuelle pour le consommateur sélectionné (15) (fig. 3).
  3. Procédé selon la revendication 2, caractérisé en ce que le réglage du consommateur sélectionné (15) en dehors de l'enveloppante.
  4. Procédé selon la revendication 1 ou 3 avec un déroulement fonctionnel technologique se reproduisant de manière cyclique dans la machine-outil ou la machine d'usinage, caractérisé en ce qu'à chaque premier cycle la pression de fonctionnement maximale est prédéfinie comme pression de la pompe pour le générateur de pression (1) et la loi de pression effective est déterminée par l'unité d'entrée et de calcul comme enveloppante par des suppléments de pression et de temps à prédéfinir et que dans les cycles suivants la pression de la pompe est commandée selon cette enveloppante en raison de la similitude des processus.
  5. Arrangement pour le contrôle et la régulation d'un générateur de pression (1), par exemple d'une pompe à cylindrée variable, pour plusieurs consommateurs hydrauliques (12, 13, 15) différents branchés en parallèle et fonctionnant en superposition temporelle dans des machines-outils et des machines d'usinage, avec des phases de travail se reproduisant de manière cyclique, qui sont alimentées en agent de pression par le générateur de pression (1), avec une unité d'entrée et de calcul (16) qui prédéfinit les valeurs de pression pour les consommateurs (12, 13, 15) et les valeurs de consigne de pression correspondantes pour le générateur de pression (1), caractérisé en ce que l'unité d'entrée et de calcul (16) est reliée, d'une part, à une première électronique d'excitation (4.1) qui commande la pression du générateur de pression (1) et, d'autre part, à au moins une seconde électronique d'excitation (4.2, 7) qui commande les consommateurs (12, 13, 15), l'unité d'entrée et de calcul (16) calculant, après l'entrée des valeurs de pression et des temps de mise en circuit et de coupure, une enveloppante pour l'ensemble du cycle de travail qui prédéfinit la loit de pression qui doit être donnée par le générateur de pression (1) pendant le temps si bien que le générateur de pression (1) garantit à tout moment exactement les besoins en pression qui résultent du nombre et des exigences de puissance respectives des consommateurs (12, 13, 15) qui se trouvent en service.
  6. Arrangement selon la revendication 5, caractérisé en ce que le générateur de pression est une pompe à cylindrée variable au dispositif de réglage de pression (2) de laquelle correspond une soupape d'étranglement proportionnelle (3) qui est réglée par la première électronique d'excitation (4.1).
  7. Arrangement selon la revendication 5 ou 6, caractérisé en ce qu'un capteur de pression (5) est affecté à un consommateur sélectionné (15) à besoins en énergie élevés, capteur de pression qui est relié, d'une part, à l'unité d'entrée et de clacul (16) et d'autre part, par une soupape d'étranglement proportionnelle (8) d'une troisième électronique d'excitation (7) et un générateur tachymétrique (6), au consommateur sélectionné (15) et dont les valeurs de pression actuelles sont continuellement adaptées aux valeurs d'entrée de l'unité d'entrée et de calcul (16) si bien qu'un réglage de la pression différant de l'enveloppante n'est possible que pour ce consommateur (15), lorsque les valeurs de pression des autres consommateurs branchés en parallèle (12, 13) sont plus faibles que la valeur de pression mesurée par le capteur de pression (5).
EP93114029A 1992-09-08 1993-09-02 Procédé et arrangement pour contrÔle et régulation d'un générateur de pression pour plusieurs utilisateurs différents et hydrauliques branchés en parallèle Expired - Lifetime EP0587043B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4229950A DE4229950C2 (de) 1992-09-08 1992-09-08 Verfahren und Einrichtung zur Steuerung und Regelung eines Druckstromerzeugers für mehrere parallel geschaltete unterschiedliche hydraulische Verbraucher
DE4229950 1992-09-08

Publications (3)

Publication Number Publication Date
EP0587043A2 EP0587043A2 (fr) 1994-03-16
EP0587043A3 EP0587043A3 (fr) 1995-04-26
EP0587043B1 true EP0587043B1 (fr) 1999-12-01

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EP93114029A Expired - Lifetime EP0587043B1 (fr) 1992-09-08 1993-09-02 Procédé et arrangement pour contrÔle et régulation d'un générateur de pression pour plusieurs utilisateurs différents et hydrauliques branchés en parallèle

Country Status (3)

Country Link
EP (1) EP0587043B1 (fr)
AT (1) ATE187267T1 (fr)
DE (2) DE4229950C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538649C2 (de) * 1995-10-17 2000-05-25 Brueninghaus Hydromatik Gmbh Leistungsregelung mit Load-Sensing
DE10110398A1 (de) * 2001-03-03 2002-09-26 Mannesmann Rexroth Ag Verfahren zur Regelung der Druckmittelzufuhr zu einem hydraulisch betätigten Aktor
JP4128482B2 (ja) * 2002-04-30 2008-07-30 東芝機械株式会社 油圧制御システム
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DE59309888D1 (de) 2000-01-05
DE4229950A1 (de) 1994-03-24
DE4229950C2 (de) 1996-02-01
ATE187267T1 (de) 1999-12-15
EP0587043A3 (fr) 1995-04-26
EP0587043A2 (fr) 1994-03-16

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