EP2610490B1 - Hydraulic drive for a pressure tranducer - Google Patents

Hydraulic drive for a pressure tranducer Download PDF

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Publication number
EP2610490B1
EP2610490B1 EP12455007.0A EP12455007A EP2610490B1 EP 2610490 B1 EP2610490 B1 EP 2610490B1 EP 12455007 A EP12455007 A EP 12455007A EP 2610490 B1 EP2610490 B1 EP 2610490B1
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Prior art keywords
pressure
hydraulic drive
pump
drive
hydraulic
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EP12455007.0A
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German (de)
French (fr)
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EP2610490A2 (en
EP2610490A3 (en
Inventor
Franz Trieb
Rene Stühlinger
Rene Moderer
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BHDT GmbH
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BHDT GmbH
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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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of 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
    • 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
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
    • 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
    • F04B2207/00—External parameters
    • F04B2207/02—External pressure
    • 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
    • Y10T137/0318—Processes
    • Y10T137/0391—Affecting flow by the addition of material or energy
    • 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
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7769—Single acting fluid servo

Definitions

  • the invention relates to a hydraulic drive with a volume and / or pressure control for a pressure booster of a high-pressure device, consisting essentially of a motor drive with a pump for a pressure medium and a controller.
  • Modern high-pressure devices operate with pressures of up to 10,000 bar and above and impose extremely high mechanical requirements on the materials of the device component, many of which are within the limits of high-strength alloys with regard to mechanical tensile and alternating strength.
  • relief valves are provided throughout for sudden interruptions of the flow of the fluid in the high-pressure line, a pressure increase up to the response of the valve can cause material damage.
  • the desired pressures in the high pressure part are created by means of pressure booster, which operate on the principle of hydraulic pressure booster, as in principle the Fig. 1 can be seen.
  • a drive of a pressure booster is usually via a hydraulic part with a volume and / or pressure control of a hydraulic fluid, which part is formed essentially of a motor drive and a pump part.
  • Essential for the hydraulic part of a high-pressure device is an efficient long-term delivery thereof, an immediate controllability during shutdowns or blockages with the avoidance of overpressure peaks and a low pulsation in the high pressure part of the device.
  • hydraulic pumps for a pressure booster are usually selected as having piston pumps which have a high power density for high pressures with good volumetric efficiency and good hydraulic-mechanical efficiency with the most accurate adjustability of the stroke volume.
  • These pumps are expertly consistently made of several parallel units piston pumps, which are used as axial piston machines in Schrägachsenaus Entry or can be designed as a radial piston pumps and have special advantages.
  • the DE 103 31 191 is considered to be the closest prior art and discloses all features of the preamble of claim 1.
  • a generic drive for a pressure booster of a high-pressure device in that as a hydraulic drive essentially a constant flow pump, or a pump which per revolution promotes a constant volume, driven by a servo motor is used, which servo motor is electrically controllable, controllable and / or switchable by means of low-pressure side means and / or high-pressure side means.
  • Advantages of the hydraulic drive according to the invention for a pressure booster are available in multiple ways.
  • One advantage is the fact that substantially no pulsation during introduction of a high-pressure medium into a filler or during water jet cutting no chipping of brittle materials when shooting occurs.
  • a change in the volume of high pressure fluid does not require immediate equipment adaptation.
  • a soft start of the high-pressure system takes place in a favorable manner with very low energy consumption.
  • an internal gear pump is used as a constant-flow pump.
  • Internal gear pumps have due to an adapted tooth shape favorable meshing conditions and thus low volumetric flow pulsation at high operating pressures of about 300 bar with good efficiency. Such pumps are also characterized by low sound pressure level.
  • a servo drive may include a DC motor, an asynchronous motor or a synchronous motor, ie any type of electric motor.
  • the distinction lies solely in the control of the motor, which is effected by a closed loop, which according to the invention signals can be supplied by low-pressure side means of the pressure booster and / or high-pressure side means of the high pressure device.
  • the servomotor is designed as a frequency-controlled drive motor.
  • FIG. 1 schematically a high-pressure device with the output side of a delivery line 3, a pulsation damper 31 and a pressure relief valve 32nd
  • a pressure booster 2 is supplied with high pressure fluid via Vorschalt Nuren 21, such as low pressure filter, pre-pressure pump, shut-off valve.
  • two plungers having pressure intensifier 2 can be moved by a hydraulic unit 1 with a pump 11 and a motor 12 via a switching block 4 by a pressure medium 10 .
  • a feed of a pressure booster is carried out according to the prior art usually by means of bent-axis variable displacement with hydraulic-mechanical flow regulator with parallel-acting cylinders whose flow rates add up.
  • a high-pressure device such as a water-jet cutting system, usually has long-lasting work phases, so that a person skilled in a drive of a pressure booster on a servo motor and a pump with constant flow rate promotion far from a conventional technically advantageous solution had to appear.
  • this is an extremely low pulsation of a high-pressure water steel, which causes no breakage at brittle materials even when shooting a breakthrough, which can be achieved in particular by using an internal gear pump 11 for a hydraulic drive 1 of a pressure booster 2 .
  • a use of a hydraulic drive 1 according to the invention causes a low pulsation and in particular low pressure fluctuations in a stop / go operation of a system, which further increases the life of the high pressure components.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Rotary Pumps (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Operation Control Of Excavators (AREA)

Description

Die Erfindung bezieht sich auf einen Hydraulikantrieb mit einer Mengen- und/oder Druckregelung für einen Druckübersetzer einer Hochdruckeinrichtung, bestehend im Wesentlichen aus einem Motorantrieb mit einer Pumpe für ein Druckmittel sowie einer Steuerung.The invention relates to a hydraulic drive with a volume and / or pressure control for a pressure booster of a high-pressure device, consisting essentially of a motor drive with a pump for a pressure medium and a controller.

Moderne Hochdruckeinrichtungen arbeiten mit Drücken bis zu 10.000 bar und darüber und stellen an die Werkstoffe der Einrichtungskomponente äußerst hohe mechanische Anforderungen, die vielfach im Grenzbereich der hochfesten Legierungen hinsichtlich mechanischer Zug- und Wechselfestigkeit liegen. Für plötzliche Unterbrechungen der Strömung des Fluids in der Hochdruckleitung sind zwar durchwegs Entlastungsventile in dieser vorgesehen, jedoch kann eine Drucksteigerung bis zum Ansprechen des Ventils Materialschädigungen bewirken. Die gewünschten Drücke im Hochdruckteil werden mittels Druckübersetzers erstellt, welche nach dem Prinzip von hydraulischen Druckübersetzern arbeiten, wie prinzipiell der Fig. 1 zu entnehmen ist.Modern high-pressure devices operate with pressures of up to 10,000 bar and above and impose extremely high mechanical requirements on the materials of the device component, many of which are within the limits of high-strength alloys with regard to mechanical tensile and alternating strength. Although relief valves are provided throughout for sudden interruptions of the flow of the fluid in the high-pressure line, a pressure increase up to the response of the valve can cause material damage. The desired pressures in the high pressure part are created by means of pressure booster, which operate on the principle of hydraulic pressure booster, as in principle the Fig. 1 can be seen.

Ein Antrieb eines Druckübersetzers erfolgt zumeist über ein Hydraulikteil mit einer Mengen- und/oder Druckregelung eines Hydraulikfluids, welches Teil im Wesentlichen aus einem Motorantrieb und einem Pumpenteil gebildet ist. Wesentlich für das Hydraulikteil einer Hochdruckeinrichtung ist eine effiziente Langzeitförderung derselben, eine unmittelbare Regelbarkeit bei Abschaltungen oder Blockierungen mit einer Vermeidung von Überdruckspitzen sowie eine geringe Pulsation im Hochdruckteil der Einrichtung.A drive of a pressure booster is usually via a hydraulic part with a volume and / or pressure control of a hydraulic fluid, which part is formed essentially of a motor drive and a pump part. Essential for the hydraulic part of a high-pressure device is an efficient long-term delivery thereof, an immediate controllability during shutdowns or blockages with the avoidance of overpressure peaks and a low pulsation in the high pressure part of the device.

Dem Stand der Technik gemäß werden als Hydraulikantrieb für einen Druckübersetzer meist Kolbenpumpen gewählt, welche für hohe Drücke bei gutem volumetrischen Wirkungsgrad und gutem hydraulisch-mechanischen Wirkungsgrad bei genauester Verstellbarkeit des Hubvolumens eine hohe Leistungsdichte aufweisen. Diese Pumpen sind fachmännisch durchwegs aus mehreren parallelen Einheiten gebildete Kolbenpumpen, die als Axialkolbenmaschinen in Schrägachsenausführung oder als Radialkolbenpumpen ausgeführt sein können und besondere Vorteile aufweisen.According to the state of the art, hydraulic pumps for a pressure booster are usually selected as having piston pumps which have a high power density for high pressures with good volumetric efficiency and good hydraulic-mechanical efficiency with the most accurate adjustability of the stroke volume. These pumps are expertly consistently made of several parallel units piston pumps, which are used as axial piston machines in Schrägachsenausführung or can be designed as a radial piston pumps and have special advantages.

Zum Einen sind dies selbst einstellende Spalte bei hydrostatisch/hydrodynamischen Belastungen von Axialkolbenmaschinen, zum Anderen besteht die Möglichkeit einer unmittelbaren Mengenregelung des Fluids durch Axwinkelverstellung Antrieb/Pumpensystem.On the one hand, these are self-adjusting gaps in hydrostatic / hydrodynamic loads of axial piston machines, on the other hand, there is the possibility of an immediate flow control of the fluid by Axwinkelverstellung drive / pump system.

Den Anforderungen an den technischen Fortschritt am Sektor Hochdruckeinrichtungen entsprechend, und zwar die Sicherheit der Anlagenregelung, die Minimierung der Druckstöße und somit die Minimierung der Werkstoffüberlastungen von Komponenten im Hochdruckteil, die Erhöhung der Lebensdauer der Einrichtung, die Steigerung der Energieeffizienz, die Verminderung des Stromverbrauches bei stillstehenden Druckübersetzern sowie die verbesserte Arbeitsweise der Hochdruckeinrichtung, ist es Aufgabe der Erfindung, eine Hydraulikeinheit für einen Hochdruckübersetzer der eingangs genannten Art zu schaffen, deren Verwendung die Nachteile im Stand der Technik überwindet.Corresponding to the requirements of technical progress in the sector of high-pressure equipment, namely the safety of the system control, the minimization of the pressure surges and thus the minimization of the material overload of components in the high-pressure part, the increase of the lifetime of the device, the increase of the energy efficiency, the reduction of the power consumption stationary pressure intensifiers and the improved operation of the high pressure device, it is an object of the invention to provide a hydraulic unit for a high pressure intensifier of the type mentioned, the use of which overcomes the disadvantages of the prior art.

Die DE 103 31 191 wird als nächst liegender Stand der Technik angesehen und offenbart alle Merkmale des Oberbegriffs des Anspruchs 1.The DE 103 31 191 is considered to be the closest prior art and discloses all features of the preamble of claim 1.

Diese Aufgabe wird mit einem gattungsgemäßen Antrieb für einen Druckübersetzer einer Hochdruckeinrichtung dadurch gelöst, dass als Hydraulikantrieb im Wesentlichen eine Konstant-Förderstrom-Pumpe, bzw. eine Pumpe, welche je Umdrehung ein konstantes Volumen fördert, angetrieben von einem Servomotor, verwendet wird, welcher Servomotor durch niederdruckseitige Mittel und/oder durch hochdruckseitige Mittel elektrisch steuerbar,regelbar und/oder schaltbar ist.This object is achieved with a generic drive for a pressure booster of a high-pressure device in that as a hydraulic drive essentially a constant flow pump, or a pump which per revolution promotes a constant volume, driven by a servo motor is used, which servo motor is electrically controllable, controllable and / or switchable by means of low-pressure side means and / or high-pressure side means.

Vorteile des erfindungsgemäßen Hydraulikantriebes für einen Druckübersetzer liegen in mehrfacher Weise vor. Ein Vorteil ist darin zu sehen, dass im Wesentlichen keine Pulsation beim Einbringen eines Hochdruckmediums in einen Füllstoff oder beim Wasserstrahlschneiden kein Abplatzen von spröden Materialien beim Anschießen entsteht.Advantages of the hydraulic drive according to the invention for a pressure booster are available in multiple ways. One advantage is the fact that substantially no pulsation during introduction of a high-pressure medium into a filler or during water jet cutting no chipping of brittle materials when shooting occurs.

Druckschwankungen beim Ein- und Ausschalten des Schneidventiles werden durch eine Verwendung des neuen Hydraulikantriebes gering gehalten, wodurch eine Überlastung der Komponenten weitgehend vermieden wird.Pressure fluctuations during switching on and off of the cutting valve are kept low by using the new hydraulic drive, whereby an overload of the components is largely avoided.

Eine Mengenänderung bei der Entnahme von Hochdruckfluid erfordert keine unmittelbare Anlagenadaptierung.A change in the volume of high pressure fluid does not require immediate equipment adaptation.

Ein Sanftanlauf der Hochdruckanlage erfolgt in günstiger Weise unter besonders geringen Energieaufwendungen.A soft start of the high-pressure system takes place in a favorable manner with very low energy consumption.

In einer Weiterbildung der Erfindung wird als Konstant-Förderstrom-Pumpe eine Innenzahnradpumpe verwendet. Innenzahnradpumpen haben aufgrund einer angepassten Zahnform günstige Zahneingriffsverhältnisse und dadurch geringe Volumenstrompulsation bei hohen Betriebsdrücken von etwa 300 bar bei gutem Wirkungsgrad. Derartige Pumpen zeichnen sich auch durch niedrige Schalldruckpegel aus.In one embodiment of the invention, an internal gear pump is used as a constant-flow pump. Internal gear pumps have due to an adapted tooth shape favorable meshing conditions and thus low volumetric flow pulsation at high operating pressures of about 300 bar with good efficiency. Such pumps are also characterized by low sound pressure level.

Ein Servoantrieb kann einen Gleichstrommotor, einen Asynchronmotor oder einen Synchronmotor, also jede Art von Elektromotor, enthalten. Die Unterscheidung liegt allein in der Ansteuerung des Motors, welche durch einen geschlossenen Regelkreis erfolgt, welchem erfindungsgemäß Signale durch niederdruckseitige Mittel des Druckübersetzers und/oder durch hochdruckseitige Mittel der Hochdruckeinrichtung zuführbar sind.A servo drive may include a DC motor, an asynchronous motor or a synchronous motor, ie any type of electric motor. The distinction lies solely in the control of the motor, which is effected by a closed loop, which according to the invention signals can be supplied by low-pressure side means of the pressure booster and / or high-pressure side means of the high pressure device.

Anlagentechnisch und verfahrenstechnisch, aber auch hinsichtlich einer Minimierung des Energieverbrauches ist es von Vorteil, wenn der Servomotor als frequenzgeregelter Antriebsmotor ausgebildet ist.In terms of plant engineering and process technology, but also with regard to minimizing energy consumption, it is advantageous if the servomotor is designed as a frequency-controlled drive motor.

Anhand einer Zeichnung soll ein Ausführungsweg der Erfindung nachstehend beschrieben werden.With reference to a drawing, an embodiment of the invention will be described below.

Es zeigt Fig. 1 schematisch eine Hochdruckeinrichtung mit ausgangsseitig einer Förderleitung 3, einem Pulsationsdämpfer 31 und einem Druckentlastungsventil 32. It shows Fig. 1 schematically a high-pressure device with the output side of a delivery line 3, a pulsation damper 31 and a pressure relief valve 32nd

Ein Druckübersetzer 2 ist mit Hochdruckfluid über Vorschalteinrichtungen 21, wie beispielsweise Niederdruckfilter, Vordruckpumpe, Absperrventil versorgbar.A pressure booster 2 is supplied with high pressure fluid via Vorschalteinrichtungen 21, such as low pressure filter, pre-pressure pump, shut-off valve.

Ein beispielsweise zwei Plungerkolben aufweisender Druckübersetzer 2 kann von einer Hydraulikeinheit 1 mit einer Pumpe 11 und einem Motor 12 über einen Schaltblock 4 von einem Druckmittel 10 bewegbar sein.An example, two plungers having pressure intensifier 2 can be moved by a hydraulic unit 1 with a pump 11 and a motor 12 via a switching block 4 by a pressure medium 10 .

Eine Anspeisung eines Druckübersetzers erfolgt gemäß dem Stand der Technik zumeist mittels Schrägachsen-Verstellpumpen mit hydraulisch-mechanischem Mengenregler mit parallel wirkenden Zylindern, deren Förderströme sich addieren.A feed of a pressure booster is carried out according to the prior art usually by means of bent-axis variable displacement with hydraulic-mechanical flow regulator with parallel-acting cylinders whose flow rates add up.

Bei unmittelbarer, axialer Ausrichtung kann dabei trotz einer Motorrotation eine sofortige Reduktion der Förderleistung von Druckmittel auf Null erreicht werden.In the case of direct, axial alignment, an immediate reduction of the delivery rate of pressure medium to zero can be achieved despite a motor rotation.

Eine Hochdruckeinrichtung, wie beispielsweise eine Wasserstrahl-Schneidanlage, weist zumeist länger dauernde Arbeitsphasen auf, sodass einem Fachmann ein Antrieb eines Druckübersetzers über einen Servomotor und eine Pumpe mit Konstant-Mengen-Förderung weitab von einer üblichen technisch vorteilhaften Lösung erscheinen musste.A high-pressure device, such as a water-jet cutting system, usually has long-lasting work phases, so that a person skilled in a drive of a pressure booster on a servo motor and a pump with constant flow rate promotion far from a conventional technically advantageous solution had to appear.

Überraschend hat sich gezeigt, dass bei einem erfindungsgemäßen Hydraulikantrieb 1 für einen Druckübersetzer 2 einer Hochdruckeinrichtung eine Verwendung einer Konstant-Förderstrom-Pumpe 11, angetrieben von einem Servomotor 12, Vorteile aufweist.Surprisingly, it has been shown that in a hydraulic drive 1 according to the invention for a pressure booster 2 of a high-pressure device, a use of a constant-flow pump 11, driven by a servomotor 12, has advantages.

Unter anderem ist dies eine äußerst geringe Pulsation eines Hochdruck-Wasserstahles, die auch beim Anschießen eines Durchbruchs kein Ausbrechen bei spröden Materialien hervorruft, was insbesondere durch Verwendung einer Innenzahnradpumpe 11 für einen Hydraulikantrieb 1 eines Druckübersetzers 2 erreichbar ist.Among other things, this is an extremely low pulsation of a high-pressure water steel, which causes no breakage at brittle materials even when shooting a breakthrough, which can be achieved in particular by using an internal gear pump 11 for a hydraulic drive 1 of a pressure booster 2 .

Eine Verwendung eines erfindungsgemäßen Hydraulikantriebs 1 bewirkt eine geringe Pulsation und insbesondere geringe Hochdruckschwankungen bei einem Stop/Go-Betrieb einer Anlage, wodurch weiters die Lebensdauer der Hochdruckkomponenten erhöht ist.A use of a hydraulic drive 1 according to the invention causes a low pulsation and in particular low pressure fluctuations in a stop / go operation of a system, which further increases the life of the high pressure components.

In vorteilhafter Weise erfolgt bei geschlossenen Hochdruckdüsen keine Bewegung des Servomotors und keine Stromaufnahme desselben, wobei bei einem Sanftanlauf des Hydraulikantriebs 1 die Start-Stromaufnahme reduzierbar ist.Advantageously, no movement takes place with closed high-pressure nozzles the servo motor and no power consumption thereof, wherein in a soft start of the hydraulic drive 1, the starting current consumption can be reduced.

Claims (4)

  1. A hydraulic drive (1) with a volume and/or pressure regulation for a pressure intensifier of a high pressure device, consisting essentially of a motor drive with a pump for a means of exerting pressure (10) as well as a control, wherein a constant delivery flow pump (11), or a pump (11) which delivers a constant volume per rotation, is used as a hydraulic drive (1), characterized in that the hydraulic drive is driven by a servomotor (12), which servomotor can be electrically (15) controlled, regulated and/or switched by low-pressure side means (13) and/or by high-pressure side means (14).
  2. A hydraulic drive (1) according to claim 1, characterized in that an internal gear pump is used as a constant delivery flow pump (11).
  3. A hydraulic drive (1) according to claim 1 or 2, characterized in that the activation of the motor in servo operation occurs through a closed control loop, to which signals can be supplied by low-pressure side means (13) in the hydraulic circuit and/or by high-pressure side means (14) of the electrical control (15) of the high pressure device.
  4. A hydraulic drive (1) according to one of claims 1 to 3, characterized in that the servomotor is designed as a frequency-controlled drive motor.
EP12455007.0A 2011-12-30 2012-11-21 Hydraulic drive for a pressure tranducer Active EP2610490B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA1909/2011A AT512322B1 (en) 2011-12-30 2011-12-30 HYDRAULIC DRIVE FOR A PRESSURE TRANSLATOR

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EP2610490A2 EP2610490A2 (en) 2013-07-03
EP2610490A3 EP2610490A3 (en) 2014-04-02
EP2610490B1 true EP2610490B1 (en) 2015-07-15

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US (1) US10302074B2 (en)
EP (1) EP2610490B1 (en)
JP (1) JP2013139871A (en)
AT (1) AT512322B1 (en)
CA (1) CA2798423C (en)
RU (1) RU2531675C2 (en)

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WO2022187879A1 (en) 2021-03-09 2022-09-15 Bft Gmbh Device and method for controlled supply of high-pressure fluid

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JP6371653B2 (en) * 2014-09-19 2018-08-08 株式会社スギノマシン Ultra high pressure generator
AT515937B1 (en) * 2014-10-20 2016-01-15 Bhdt Gmbh Hydraulic drive for a pressure intensifier
US9358667B2 (en) 2014-10-30 2016-06-07 Shape Technologies Group, Inc. System and method for low pressure piercing using a waterjet cutter
AT516738B1 (en) * 2015-02-23 2016-08-15 Reinhard Ing Gruber Method and device for operating a hydraulic high pressure system
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CA2798423C (en) 2016-12-06
EP2610490A2 (en) 2013-07-03
JP2013139871A (en) 2013-07-18
EP2610490A3 (en) 2014-04-02
AT512322B1 (en) 2013-09-15
US10302074B2 (en) 2019-05-28
RU2531675C2 (en) 2014-10-27
US20130167951A1 (en) 2013-07-04
AT512322A1 (en) 2013-07-15
RU2012157990A (en) 2014-07-10

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