EP2610049B2 - Procédé de commande d'une presse hydraulique - Google Patents

Procédé de commande d'une presse hydraulique Download PDF

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Publication number
EP2610049B2
EP2610049B2 EP12008248.2A EP12008248A EP2610049B2 EP 2610049 B2 EP2610049 B2 EP 2610049B2 EP 12008248 A EP12008248 A EP 12008248A EP 2610049 B2 EP2610049 B2 EP 2610049B2
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EP
European Patent Office
Prior art keywords
main
electric motor
pump
hydraulic fluid
switched
Prior art date
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Application number
EP12008248.2A
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German (de)
English (en)
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EP2610049A3 (fr
EP2610049A2 (fr
EP2610049B1 (fr
Inventor
Josef Heitzler
Ulrich Salamon
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L Schuler GmbH
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L Schuler GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/166—Electrical control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14—Energy-recuperation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Definitions

  • the invention relates to a method for controlling a hydraulic press which has at least one main pump which can be driven by a main electric motor and by means of which a hydraulic fluid can be conveyed to an adjustable press part, the main electric motor being switched off during an idle phase of the hydraulic press switched off and switched on again at the end of the idling phase and ramped up to a predetermined speed.
  • a hydraulic press is used, for example, for forming metal blanks and has at least one press part, for example a ram, which can be moved between different positions by applying pressurized hydraulic fluid.
  • a ram which can be moved between different positions by applying pressurized hydraulic fluid.
  • at least one main electric motor is activated, i.e. supplied with electrical energy and run up to a predetermined speed.
  • the main electric motor drives a main pump that delivers hydraulic fluid under pressure to the ram.
  • a hydraulic press in which the hydraulic fluid displaced when the piston is lowered is conveyed through a 1st pump into a storage tank and additionally through a 2nd pump into another cylinder chamber.
  • electrical energy can be recovered in the usual way by means of the servomotors and stored.
  • the electric motors assigned to the pumps are operated as generators.
  • a corresponding energy recovery is not the subject of the present invention, but this relates to a motor run-up concept in order to avoid excessive switching movements of the electric motor, as illustrated above.
  • the invention is based on the object of creating a method for controlling a hydraulic press of the type mentioned, in which on the one hand the loads on the main electric motor and the switching devices are avoided when starting up and on the other hand the consumption of electrical energy is lower than with a constantly running main -Electric motor is.
  • this object is achieved by a method according to one of the independent claims 1 to 4 .
  • the main pump is switched to a drive mode to start up the main electric motor, in which it is driven by the hydraulic fluid flowing through it and drives the main electric motor, and that the hydraulic fluid is conveyed by the main pump by means of an auxiliary drive, so that the main pump drives the main electric motor, the main electric motor being supplied with electrical energy when a predetermined speed is reached and the main pump being switched to a pump mode in which it promotes the hydraulic fluid in the usual way.
  • the auxiliary drive is an auxiliary electric motor that drives an auxiliary pump, by means of which the hydraulic fluid is conveyed through the main pump.
  • the auxiliary electric motor can be in continuous operation with relatively low power, but this means that only a small amount of electrical energy is consumed.
  • main pumps can deliver the hydraulic fluid to different adjustable press parts.
  • one of the main electric motors together with the main pump assigned to it, forms the auxiliary drive and conveys the hydraulic fluid through the at least one additional main pump, whereby this is driven and in turn the additional main electric motor assigned to it on the brings or maintains the desired speed.
  • the basic idea of this embodiment of the invention is not to run up the main electric motor from a standstill or a greatly reduced speed by means of electrical energy, but first to accelerate the main electric motor by means of the main pump assigned to it until a predetermined speed, For example, the idling speed of the main electric motor is reached, and only then connect the main electric motor to the power grid, ie to apply electrical energy.
  • the main pump can be switched between a normal operating mode, i.e. the pump mode in which it delivers the hydraulic fluid in the usual way, and a drive mode in which it is driven by the hydraulic fluid flowing through it and thereby drives the main electric motor connected to it and to the desired speed.
  • a normal operating mode i.e. the pump mode in which it delivers the hydraulic fluid in the usual way
  • a drive mode in which it is driven by the hydraulic fluid flowing through it and thereby drives the main electric motor connected to it and to the desired speed.
  • the main pump is switched to a drive mode in which it is driven by the hydraulic fluid flowing through it and drives the main electric motor so that it is kept at a predetermined speed, that the hydraulic fluid is pumped through the hydraulic fluid by means of an auxiliary drive Main pump is funded, so that the main pump drives the main electric motor, and that the main electric motor is then supplied with electrical energy again and the main pump is switched to a pump mode.
  • the auxiliary drive is an auxiliary electric motor that drives an auxiliary pump, by means of which the hydraulic fluid is conveyed through the main pump.
  • the auxiliary electric motor can be in continuous operation with relatively low power, but this means that only a small amount of electrical energy is consumed.
  • main pumps can deliver the hydraulic fluid to different adjustable press parts.
  • one of the main electric motors together with the main pump assigned to it, forms the auxiliary drive and conveys the hydraulic fluid through the at least one additional main pump, whereby this is driven and in turn the additional main electric motor assigned to it on the brings or maintains the desired speed.
  • the main electric motor When the rest or idling period of the hydraulic press is relatively short, the main electric motor is maintained at a speed close to its idling speed. According to the invention, however, this is not achieved by electrical energy, but the main electric motor is kept at the predetermined speed by means of the main pump assigned to it. Only at the end of the rest or idle phase of the hydraulic press, i.e. when hydraulic fluid has to be pumped again, is the main electric motor reconnected to the mains and supplied with electrical energy and the main pump is switched to pump mode in which it promotes the hydraulic fluid in the usual way.
  • the hydraulic fluid can be conveyed through the main pump by means of the auxiliary drive and thereby drive it.
  • the speed of the main electric motor is preferably monitored by a tachogenerator.
  • a tachogenerator can be omitted.
  • a speed signal corresponding to the ACTUAL speed of the main motor is fed to a controller, in which it is checked whether the main electric motor is running at a desired speed or has already reached it. If this is the case when starting up the main electric motor, the main electric motor is switched to be supplied with and driven by electrical energy. At the same time, the main pump is switched to pump mode, in which it is driven by the main electric motor and pumps the hydraulic fluid.
  • the figure 1 shows a section of the hydraulic circuit arrangement of a hydraulic press.
  • a main pump P 1 is connected via a line L 1 to a supply V of hydraulic fluid and can suck it out of the supply V and lead it to a consumer (not shown) in a line L 2 .
  • a check valve RS is arranged, which can be unlocked via a switching valve YRS.
  • a line L 3 branches off from the line L 2 , in which line an auxiliary pump P H is arranged, which is connected via a line L 4 to a supply V' of hydraulic fluid.
  • the auxiliary pump P H is driven by an auxiliary electric motor M H .
  • a release valve Y is arranged in the line L 3 .
  • the main pump P 1 is connected to a main electric motor M 1 which supplies electrical energy is, which can be switched on and off by means of a switch K in the form of a power contactor.
  • the speed of the main electric motor M 1 is detected by a tachometer generator T, which feeds a corresponding speed signal to a controller for evaluation.
  • the main pump P1 can be switched between a normal pump mode and a drive mode.
  • the main electric motor M 1 is supplied with electrical energy and set in rotation, whereby the main pump P 1 , which is in pump mode, is driven and thereby hydraulic fluid from the supply V via the line L 1 sucks in and feeds through the check valve RS in line L 2 to the consumer.
  • the main electric motor M 1 is switched off using the switch K, which also causes the main pump P 1 to come to a standstill or at least to increase its speed is countersunk.
  • the check valve RS is first unlocked via the switching valve YRS and the release valve Y is opened.
  • the main pump P 1 is switched to its drive mode.
  • the hydraulic fluid is then sucked in from the reservoir V' by the auxiliary pump P H , which is driven by the auxiliary electric motor M H , and fed to the reservoir V via the line L 3 and the line L 2 by the main pump P 1 .
  • the hydraulic fluid flows through the main pump P 1 , which is in its drive mode, ie it is driven by the hydraulic fluid flowing through it and thus drives the main electric motor M 1 , as a result of which the latter is run up.
  • the speed of the main electric motor M 1 is detected by the tachogenerator T.
  • the switch K is activated, thereby electrically energizing and driving the main electric motor M 1 .
  • the associated main pump P 1 is switched back to pump mode, in which it is driven by the main electric motor M 1 .
  • the check valve RS is blocked again and the release valve Y is closed again, so that the hydraulic fluid can be supplied from the supply V to the consumer in the manner mentioned.
  • the main electric motor M 1 In a relatively short idling phase of the hydraulic press, the main electric motor M 1 is kept at a predetermined speed.
  • the hydraulic fluid is supplied to the supply V by the auxiliary pump P H from the supply V′ through the main pump P 1 in the manner mentioned.
  • the main pump P 1 which is in its drive mode, is driven by the hydraulic fluid flowing through it and thus drives the main electric motor M 1 .
  • the controller recognizes that the main pump P 1 is in its drive mode and is being driven by the hydraulic fluid, the supply of electrical energy to the main electric motor M 1 is switched off by means of the switch K .
  • the main electric motor M 1 is then kept by the main pump P 1 at a desired speed, in particular close to the idle speed, which is monitored by the tachometer generator T and controlled by the controller.
  • the main electric motor M 1 is reconnected to the electrical power supply via the switch K and the main pump P 1 is switched back to the pump mode in which it is driven by the main electric motor M 1 .
  • the valves are switched in such a way that the hydraulic fluid can be supplied from the supply V to the consumer in the manner mentioned.
  • FIG. 2 showed a section of the hydraulic circuit arrangement of a hydraulic press.
  • a first main pump P 1 is connected via a line L 1 to a supply V 1 of hydraulic fluid and can draw it in from the supply V 1 and feed it to a consumer (not shown) in a line L 2 .
  • a check valve RS is arranged, which can be unlocked via a switching valve YRS.
  • the first main pump P 1 is connected to a first main electric motor M 1 which is supplied with electrical energy which can be switched on and off by means of a switch K in the form of a power contactor.
  • the speed of the first main electric motor M 1 is detected by a tachometer generator T, which feeds a corresponding speed signal to a controller for evaluation.
  • the first main pump P 1 can be switched between a normal pump mode and a drive mode.
  • a second main pump P 2 is arranged parallel to the first main pump P 1 , which is connected via a line L 5 to a supply V 2 of hydraulic fluid and draws it from the supply V 2 and into a line L 6 the can supply consumers not shown.
  • a further check valve RS2 is arranged in the line L 6 and the lines L 2 and L 6 are combined downstream of the check valve RS2.
  • the second main pump P 2 is connected to a second main electric motor M 2 which is supplied with electrical energy which can be switched on and off by means of a switch K in the form of a contactor.
  • the two main electric motors M 1 and M 2 are each supplied with electrical energy and rotated, whereby the main pumps P 1 and P 2 are driven and respectively Hydraulic fluid is drawn in from the respective reservoir V 1 or V 2 via lines L 1 or L 5 and fed to the consumer via lines L 2 or L 6 .
  • the first main electric motor M 1 is switched off by means of the switch K, which also causes the first main pump P 1 to come to a standstill or at least its speed is greatly lowered.
  • the second main electric motor M 2 continues to run, with the second main pump P 2 , which has an adjustable delivery rate, being switched to zero, ie delivering no hydraulic fluid.
  • the check valve RS is first unlocked via the switching valve YRS .
  • the hydraulic fluid is then drawn from the reservoir V 2 by the second main pump P 2 , which is driven by the second main electric motor M 2 , via the lines L 6 and L 2 through the first main pump P 1 to the reservoir V 1 supplied.
  • the hydraulic fluid flows through the first main pump P 1 , which is in its drive mode, ie it is driven by the hydraulic fluid flowing through it and thus drives the first main electric motor M 1 , causing it to run up.
  • the speed of the first main electric motor M 1 is detected by the tachometer generator.
  • the switch K When the controller determines that the speed of the first main electric motor M 1 has reached a desired speed, the switch K is activated, thereby electrically energizing and driving the first main electric motor M 1 . At the same time, the associated first main pump P 1 is switched back to pump mode, in which it is driven by the first main electric motor M 1 . The check valve RS is blocked again, so that the hydraulic fluid can be supplied to the consumer in the manner mentioned by means of the two main pumps P 1 and P 2 from the respective supply V 1 and V 2 .
  • the first main electric motor M 1 is disconnected from the electrical power supply by means of the switch K, but is kept at a predetermined speed by the first main pump P 1 , the first main pump P 1 is in its drive mode and is driven by the hydraulic fluid delivered by the second main pump P 2 . Details are in connection with figure 1 described, but now the auxiliary drive is formed by the second main pump P 2 .
  • FIG 3 shows a hydraulic circuit arrangement of a press which is not according to the invention.
  • a main pump P 1 is connected via a line L 1 to a supply V of hydraulic fluid and can draw it in from the supply V and feed it in a line L 2 to a consumer, which in the exemplary embodiment shown is controlled by a hydraulically adjustable tappet S is formed, which is adjustably received and guided in a cylinder Z.
  • a check valve RS which can be unlocked via a switching valve YRS, and a release valve Y are arranged in the line L 2 .
  • the main pump P 1 is connected to a main electric motor M 1 which is supplied with electrical energy which can be switched on and off by means of a switch K in the form of a power contactor.
  • the speed of the main electric motor M 1 is detected by a tachometer generator T, which feeds a corresponding speed signal to a controller for evaluation.
  • the main pump P1 can be switched between a normal pump mode and a drive mode.
  • the main electric motor M 1 is supplied with electrical energy and set in rotation, whereby the main pump P 1 is driven, which thereby pumps hydraulic fluid from the supply V via the Line L 1 sucks in and feeds through the check valve RS and through the release valve Y to the cylinder Z.
  • the main electric motor M 1 In an idle phase, ie when no hydraulic fluid has to be conveyed to the consumer, the main electric motor M 1 is switched off by means of the switch K, as a result of which the main pump P 1 also comes to a standstill.
  • the check valve RS In order to start up the main electric motor M1 again, the check valve RS is unlocked via the switching valve YRS and the release valve Y is opened.
  • the main pump P 1 is switched to drive mode.
  • the displacement of the ram S in the cylinder Z displaces the hydraulic fluid from the cylinder Z and conveys it through the line L 2 and the line L 1 into the supply V, with the main pump P 1 flowing through and being driven thereby. In this way, the main pump P 1 drives the main electric motor M 1 , causing it to start up.
  • the speed of the main electric motor M 1 is detected by the tachogenerator T. As soon as the desired speed of the electric motor M1 has been reached, the switch K is activated, as a result of which the main electric motor M1 is supplied with electrical energy and driven.
  • the main pump P 1 remains in its drive mode until a predetermined position of the ram is reached. The main pump P 1 is then switched to the pump mode, so that the hydraulic fluid can be sucked in from the supply V by means of the main pump P 1 in the manner mentioned and can be supplied to the cylinder Z.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (6)

  1. Procédé de commande d'une presse hydraulique, comportant au moins une pompe principale (P1) entraînée à l'aide d'un moteur électrique principal (M1) et à l'aide de laquelle le fluide hydraulique peut être transporté jusqu'à une partie de presse (S) mobile, le moteur électrique principal (M1) étant déconnecté pendant une phase de fonctionnement à vide de la presse hydraulique et étant de nouveau connecté à la fin de la phase de fonctionnement à vide et démarré à une vitesse de rotation prédéfinie, la pompe principale (P1) étant connectée pour démarrer le moteur électrique principal (M1) dans un mode d'entraînement dans lequel elle est entraînée par le fluide hydraulique la traversant et entraînant le moteur électrique principal (M1) et le fluide hydraulique étant transporté au travers de la pompe principale (P1) à l'aide d'un entraînement auxiliaire (MH, PH), de sorte que la pompe principale (P1) entraîne le moteur électrique principal (M1), l'entraînement auxiliaire étant un moteur électrique auxiliaire (MH) entraînant une pompe auxiliaire (PH) à l'aide de laquelle le fluide hydraulique est transporté au travers de la pompe principale (P1) et le moteur électrique principal (M1) étant alimenté en énergie électrique lorsqu'une vitesse de rotation prédéfinie est atteinte et la pompe principale (P1) étant basculée dans un mode de pompage.
  2. Procédé de commande d'une presse hydraulique, comportant au moins une pompe principale (P1) entraînée à l'aide d'un moteur électrique principal (M1) et à l'aide de laquelle un fluide hydraulique peut être transporté jusqu'à une partie de presse (S) mobile, le moteur électrique principal (M1) étant déconnecté pendant une phase de fonctionnement à vide de la presse hydraulique et étant de nouveau connecté à la fin de la phase de fonctionnement à vide et démarré à une vitesse de rotation prédéfinie, la pompe principale (P1) étant connectée pour démarrer le moteur électrique principal (M1) dans un mode d'entraînement dans lequel elle est entraînée par le fluide hydraulique la traversant et entraînant le moteur électrique principal (M1) et le fluide hydraulique étant transporté à l'aide d'un entraînement auxiliaire (M2, P2) au travers de la pompe principale (P1), de sorte que la pompe principale (P1) entraîne le moteur électrique principal (M1), la presse hydraulique comportant au moins deux pompes principales (P1, P2) auxquelles est respectivement associé un moteur électrique principal (M1, M2) et avec lesquelles le fluide hydraulique peut être transporté jusqu'à la partie de presse mobile, un des moteurs électriques principaux (M2) formant, conjointement avec la pompe principale (P2) lui étant associée, l'entraînement auxiliaire transportant le fluide hydraulique au travers de l'au moins une pompe principale (P1) supplémentaire et l'entraînant et le moteur électrique principal (M1) étant alimenté en énergie électrique en mode de pompage lorsqu'une vitesse de rotation prédéfinie est atteinte et la pompe principale (P1) étant basculée dans un mode de pompage.
  3. Procédé de commande d'une presse hydraulique, comportant au moins une pompe principale (P1) entraînée à l'aide d'un moteur électrique principal (M1) et à l'aide de laquelle le fluide hydraulique est transporté à une partie de presse (S) mobile, le moteur électrique principal (M1) étant déconnecté pendant une phase de fonctionnement à vide de la presse hydraulique et de nouveau connecté à la fin de la phase de fonctionnement à vide, la pompe principale (P1) étant basculée dans un mode d'entraînement dans lequel elle est entraînée par le fluide hydraulique la traversant et entraînant le moteur électrique principal (M1), de sorte que celui-ci soit maintenu à une vitesse de rotation prédéfinie et le fluide hydraulique étant transporté au travers de la pompe principale (P1) à l'aide d'un entraînement auxiliaire (MH, PH), de sorte que la pompe principale (P1) entraîne le moteur électrique principal (M1), l'entraînement auxiliaire étant un moteur électrique auxiliaire (MH) entraînant une pompe auxiliaire (PH) à l'aide de laquelle le fluide hydraulique est transporté au travers de la pompe principale (P1) et le moteur électrique principal (M1) étant ensuite de nouveau alimenté en énergie électrique et la pompe principale (P1) étant basculée dans un mode de pompage.
  4. Procédé de commande d'une presse hydraulique, comportant au moins une pompe principale (P1) entraînée à l'aide d'un moteur électrique principal (M1) et à l'aide de laquelle le fluide hydraulique peut être transporté jusqu'à une partie de presse (S) mobile, le moteur électrique principal (M1) étant déconnecté pendant une phase de fonctionnement à vide de la presse hydraulique et étant de nouveau connecté à la fin de la phase de fonctionnement à vide, la pompe principale (P1) étant basculée dans un mode d'entraînement dans lequel elle est entraînée par le fluide hydraulique la traversant et entraînant le moteur électrique principal (M1), de sorte que celui-ci soit maintenu à une vitesse de rotation prédéfinie et le fluide hydraulique étant transporté au travers de la pompe principale (P1) à l'aide d'un entraînement auxiliaire (M2, P2), de sorte que la pompe principale (P1) entraîne le moteur électrique principal (M1), la presse hydraulique comportant au moins deux pompes principales (P1, P2) auxquelles est respectivement associé un moteur électrique principal (M1, M2) et à l'aide desquelles le fluide hydraulique peut être transporté jusqu'à la partie de presse mobile, un des moteurs électriques principaux (M2) formant, conjointement avec la pompe principale (P2) lui étant associée, l'entraînement auxiliaire et transportant le fluide hydraulique au travers de l'au moins une pompe principale (P1) supplémentaire et l'entraînant et le moteur électrique principal (M1) étant alimenté en énergie électrique lorsqu'une vitesse de rotation prédéfinie est atteinte et la pompe principale (P1) étant basculée dans un mode de pompage.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la vitesse de rotation du moteur électrique principal (M1) est surveillée et qu'un signal de vitesse de rotation correspondant est envoyé à un élément de commande.
  6. Procédé selon la revendication 5, caractérisé en ce que la vitesse de rotation du moteur électrique principal (M1) est déterminée par mesure de fréquence au niveau des bornes de moteur du moteur disjointes du réseau de courant triphasé.
EP12008248.2A 2012-01-02 2012-12-11 Procédé de commande d'une presse hydraulique Active EP2610049B2 (fr)

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DE102015105400B4 (de) 2015-04-09 2022-06-02 Langenstein & Schemann Gmbh Umformmaschine, insbesondere Schmiedehammer, und Verfahren zum Steuern einer Umformmaschine
CN105082610B (zh) * 2015-09-07 2017-04-26 华中科技大学 一种用于降低液压机装机功率的动力装置及其应用
CN107344425A (zh) * 2016-05-04 2017-11-14 叶明坦 一种全自动生物质燃料加速增压成型机及其控制方法
DE102018108415A1 (de) 2018-04-10 2019-10-10 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren zum Betrieb eines hydraulischen Systems
CN109434425B (zh) * 2018-12-11 2021-06-04 山东省科学院激光研究所 压力机系统
CN111022439B (zh) * 2019-12-13 2022-03-01 三一重机有限公司 一种回转制动防反转方法、装置及工程机械

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EP2610049A2 (fr) 2013-07-03
EP2610049B1 (fr) 2017-07-26

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