EP2504586A2 - Entraînement hydraulique - Google Patents

Entraînement hydraulique

Info

Publication number
EP2504586A2
EP2504586A2 EP10788237A EP10788237A EP2504586A2 EP 2504586 A2 EP2504586 A2 EP 2504586A2 EP 10788237 A EP10788237 A EP 10788237A EP 10788237 A EP10788237 A EP 10788237A EP 2504586 A2 EP2504586 A2 EP 2504586A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
hydraulic fluid
drive
line
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.)
Withdrawn
Application number
EP10788237A
Other languages
German (de)
English (en)
Inventor
Bernard De Muynck
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.)
Haco NV
Original Assignee
Haco NV
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 Haco NV filed Critical Haco NV
Publication of EP2504586A2 publication Critical patent/EP2504586A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
    • 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
    • F04B49/02—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
    • 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
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • 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
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0427—Heating
    • 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
    • F15B2211/20538—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
    • F15B2211/25—Pressure control functions
    • 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
    • F15B2211/255—Flow control functions
    • 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
    • F15B2211/62—Cooling or heating 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
    • F15B2211/60—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
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
    • F15B2211/632—Electronic controllers using input signals representing a flow rate
    • F15B2211/6323—Electronic controllers using input signals representing a flow rate the flow rate being a pressure source flow rate
    • 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
    • F15B2211/6343—Electronic controllers using input signals representing a temperature
    • 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
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/6654—Flow rate 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions

Definitions

  • the invention relates to a hydraulic drive for driving at least one hydraulic actuator, comprising at least one hydraulic pump drivable by an electric motor and at least one hydraulic fluid conducting hydraulic line, via which the hydraulic pump can be connected to the hydraulic actuator.
  • the invention further relates to a hydraulic system with at least one hydraulic actuator and a method for operating a hydraulic drive, which is equipped with at least one electric motor for driving a hydraulic pump and with which the properties of a hydraulic fluid can be varied so that it matches the properties of at least one hydraulic actuator to be supplied with the hydraulic actuator can be adapted.
  • Hydraulic drives are known in various designs and are used to drive hydraulic actuators, such as hydraulic cylinders or the like.
  • a hydraulic drive via at least one hydraulic line with the hydraulic actuator can be connected in order to be able to drive this in the desired manner.
  • the hydraulic line conducts a hydraulic fluid, for example a hydraulic oil or the like, the flow of which can be controlled in particular via hydraulic valves. The latter are suitably controlled to drive the hydraulic drive, i. opened and closed.
  • the electric motor is only switched on when it is determined via the electronic control device that the actual pressure present in the hydraulic line falls below a predefinable setpoint pressure, since in such a state the required energy for suitably driving the hydraulic actuator is not present.
  • the electric motor is automatically switched off so as not to consume energy even in idle phases in which the hydraulic actuator is not used , This shutdown of the electric motor in idle phases of this and also over the electric motor drivable hydraulic pump are also against wear protected, so that a hydraulic drive according to the invention can be operated with lower maintenance costs and longer service lives.
  • the hydraulic drive according to the invention is thus energy efficient and inexpensive to use.
  • the electric motor may in this case be servo-controlled, for example.
  • the operation of conventional hydraulic drives usually involves idling phases, which account for about 90% of the total operating time.
  • the hydraulic drive according to the invention thus enables a significant reduction in energy costs by automatically switching off the electric motor in the idling phases.
  • This shutdown of the electric motor is also associated with a significant reduction in heat generation, which occurs during operation of the electric motor and thus driven hydraulic pump and can adversely affect the operation of the hydraulic drive.
  • the heat still generated by the electric motor or the hydraulic pump is dissipated and used for other purposes.
  • the hydraulic drive according to the invention can be used for example in bridge constructions, cranes, ships, drilling rigs or the like, but in particular in any type of hydraulic presses.
  • the hydraulic drive can have one or more hydraulic pumps.
  • any number of configurations of the hydraulic drive are considered as lying within the scope of the invention.
  • the duration of idle phases and operating phases is detected by the electronic control or regulating device.
  • Parameters can be specified which prevent the electric motor from being switched off automatically in any idling phase. Instead, a shutdown of the electric motor can then take place when an idle phase of a certain duration, that is, according to the predetermined parameters, is present.
  • the hydraulic drive has at least one connected to the electronic control device Means for detecting the actual temperature in the hydraulic line, wherein the control device for automatically controlling the temperature in the hydraulic line based on the detected actual temperature is set in relation to a predetermined target temperature.
  • the electronic control device is preferably a comparison of the detected actual temperature in the hydraulic line with the predetermined target temperature.
  • the hydraulic fluid can be heated or cooled to the respectively optimum operating temperature as a function of the result of the comparison. This can be done with a suitable heating and / or cooling device. Keeping the hydraulic fluid at its optimum operating temperature is also important for the energy efficiency of a hydraulic drive, especially since the actual temperature is directly related to the viscosity characteristics of the hydraulic fluid.
  • the hydraulic drive at least one device connected to the electronic control device for detecting the actual flow in the hydraulic line, wherein the control device for automatically controlling the flow in the hydraulic line based on the detected actual flow in relation is set up for a predetermined target flow.
  • the regulation of the flow of hydraulic fluid in the hydraulic line serves to provide an optimal and energy-efficient operation of the hydraulic drive.
  • the electronic control device preferably compares the respectively detected actual flow with the predefinable desired flow and regulates the actual flow to an optimum value as a function of the result of this comparison. Furthermore, it can be determined by the detection of the actual flow, whether the hydraulic actuator is currently supplied with energy or must be or whether no energy is needed, so that the electric motor can be turned off.
  • a further advantageous embodiment of the invention provides that the hydraulic drive has at least one hydraulic fluid reservoir, which can be connected to the hydraulic line via a hydraulic fluid supply line.
  • the hydraulic fluid supply line via the hydraulic pump with the hydraulic line is connectable.
  • a hydraulic fluid reservoir it is possible, for example, to compensate for an adverse leakage of hydraulic fluid by supplying hydraulic fluid from the hydraulic fluid reservoir to the hydraulic line.
  • an excess of hydraulic fluid which can be detected, for example, by an excessively high actual pressure in the hydraulic line, be discharged from the hydraulic line to the hydraulic fluid reservoir in order to obtain optimum operating parameters for the hydraulic drive.
  • the supply and removal of hydraulic fluid to or from the hydraulic line can for example be done automatically by means of the electronic control device, which controls the hydraulic valves provided for this purpose in a suitable manner.
  • the hydraulic fluid reservoir is provided with a heating and / or cooling unit.
  • This serves to heat supply hydraulic fluid to a temperature which ensures optimum operation of the hydraulic drive, or to cool discharged hydraulic fluid.
  • the heat extracted from the hydraulic fluid during cooling can be dissipated and used for other purposes.
  • a heating of the hydraulic fluid is particularly advantageous when using the hydraulic drive under very low ambient temperatures.
  • a cooling of the hydraulic fluid is advantageous when the hydraulic drive is used in very hot environments.
  • the hydraulic fluid reservoir is equipped with a device for filtering the hydraulic fluid.
  • This can dissipated Hydraulic fluid, which may have been contaminated during its use, to be filtered before it is supplied to the hydraulic fluid reservoir.
  • the filtering may alternatively or in combination therewith also take place before the hydraulic fluid is fed into the hydraulic line and after it has been removed from the hydraulic fluid reservoir.
  • the hydraulic drive has at least one device which can be connected to the hydraulic line for storing the hydraulic fluid under a prescribable pressure.
  • This device also referred to as an accumulator, can be used to feed hydraulic fluid under optimum pressure into the hydraulic line when the hydraulic pump is not yet turned on or in its start-up phase, but there is already a demand for energy due to the activity of the hydraulic actuator , Furthermore, this device can be used to dampen peak loads occurring in the pressure curve. In such situations, additional pressurized hydraulic fluid is needed which can be provided by this device.
  • the device can be filled again with hydraulic fluid, which preferably takes place via a suitable pressure generation by means of the hydraulic pump.
  • a rechargeable battery is a device for the efficient storage of hydraulic energy, which can be called up at any time.
  • the hydraulic drive has at least one pressure relief valve arranged on the hydraulic line.
  • This safety device serves to discharge hydraulic fluid from the hydraulic line when the actual pressure in the system is such that damage to components of the hydraulic drive is to be feared.
  • the overpressure valve can be controlled automatically or by means of the electronic control device, which actuates the overpressure valve on the basis of detected actual parameters and a comparison with corresponding desired parameters.
  • the hydraulic fluid discharged via the pressure relief valve is preferably supplied to the hydraulic fluid reservoir.
  • the hydraulic pump is combined with at least one device connected to the electronic control device for detecting the flow of the hydraulic fluid. Also, the actual parameters detected with this device can be utilized to provide optimal operation of the hydraulic drive.
  • the electronic control device comprises means for inputting desired hydraulic fluid values and / or means for displaying detected actual hydraulic fluid values.
  • These means provide an interface to the operator of the hydraulic drive and at the same time allow, inter alia, a manual adjustment of the hydraulic drive to a variety of uses, while the given operating parameters can be monitored.
  • desired pressure values, desired temperature values, desired flow values or the like can be input via the means for inputting desired hydraulic fluid values.
  • parameters can be entered, which determine from which duration of an idle phase an automatic shutdown of the electric motor makes sense.
  • the means for displaying actual values of hydraulic fluid can have, for example, a monitor on which, for example, the actual pressure, the actual temperature, the actual flow, the energy consumption, statistical information, information messages, error messages, maintenance warnings or the like are displayed can.
  • the hydraulic drive has two or more hydraulic pumps.
  • the hydraulic pumps differ in their dimensions and / or performance.
  • the invention further proposes a hydraulic system of the type mentioned, which has at least one hydraulic drive according to one of the above-described embodiments or any combination thereof for achieving the above object. It is further proposed a method of the type mentioned, which solves the above issue in that at least the actual pressure of the hydraulic fluid is detected, the detected actual pressure is compared with a predetermined target pressure, and the electric motor is turned on automatically if the actual pressure is less than the target pressure value and automatically shuts off when the actual pressure is equal to or greater than the target pressure.
  • Figure 1 a schematic representation of a
  • Embodiment for the hydraulic drive according to the invention Embodiment for the hydraulic drive according to the invention.
  • FIG. 1 schematically shows an exemplary embodiment of the hydraulic drive A according to the invention.
  • the latter can be connected via a hydraulic line L to a hydraulic actuator (not shown).
  • the hydraulic drive A has a hydraulic pump 2, which can be driven by an electric motor M. Downstream of the hydraulic pump 2 is a device 7 for detecting the actual pressure in the hydraulic line L. This device 7 is connected to an electronic control device 10, which in turn is connected to the electric motor M and arranged such that it automatically shuts off the electric motor M when the detected actual pressure is equal to or greater than a predetermined target pressure, and automatically turns on when the actual pressure is smaller than the target pressure.
  • This control of the hydraulic drive A is associated with the above-described advantages of energy efficiency and cost-effectiveness.
  • the hydraulic drive A further has a device 6 connected to the electronic control device 10 for detecting the actual temperature in the hydraulic line L, the control device 10 for automatically regulating the temperature in the hydraulic line L on the basis of the detected actual temperature in relation to a predetermined target temperature is set up.
  • the hydraulic drive A also has a device 8 connected to the electronic control device 10 for detecting the actual flow in the hydraulic line L.
  • the control device 10 is designed to automatically regulate the flow in the hydraulic line L on the basis of the detected actual flow in relation to a predefinable target flow.
  • the outlet of the hydraulic line L is at 12.
  • the hydraulic drive A also has a hydraulic fluid reservoir 1 which can be connected to the hydraulic line L via a hydraulic fluid supply line 11 and the hydraulic pump 2. If necessary, it is possible to discharge hydraulic fluid via the hydraulic pump 2 to the hydraulic fluid reservoir 1 or to supply it from this.
  • the hydraulic fluid reservoir 1 has a heating and / or cooling unit with which the hydraulic fluid to be supplied can be heated to a desired temperature or hydraulic fluid discharged can be cooled.
  • the hydraulic fluid reservoir 1 has a device (not shown in greater detail) for filtering the hydraulic fluid.
  • the hydraulic drive A further comprises a connectable to the hydraulic line L means 5 for storing of under a predetermined pressure standing hydraulic fluid (accumulator). This can supply (possibly pressurized) hydraulic fluid as needed, for example, to compensate for peak loads in the pressure curve and to be able to dampen.
  • a pressure relief valve 9 Arranged on the hydraulic line L is a pressure relief valve 9, which discharges hydraulic fluid from the hydraulic line L into the hydraulic fluid reservoir 1 when there is a harmful overpressure present in the hydraulic line L.
  • the hydraulic pump 2 is combined with at least one device (not shown) connected to the electronic control device 10 for detecting the flow of the hydraulic fluid.
  • the electronic control device 10 has means for inputting hydraulic fluid target values and means for displaying detected hydraulic fluid actual values.
  • the means for inputting desired hydraulic fluid values it is possible, for example, to specify a desired pressure, a desired temperature and a desired flow.
  • the detected hydraulic fluid actual values can be displayed to the operating personnel of the hydraulic drive A, for example, on a monitor and thus monitored in a simple manner.

Abstract

L'invention concerne un entraînement hydraulique (A) servant à entraîner au moins un actionneur hydraulique, présentant au moins une pompe hydraulique pouvant être entraînée par un moteur électrique (M) et au moins une conduite hydraulique (L) acheminant un fluide hydraulique et permettant de raccorder la pompe hydraulique (2) à l'actionneur hydraulique. L'objectif de l'invention est de créer un entraînement hydraulique (A) efficace sur le plan énergétique et peu onéreux. À cet effet, l'entraînement hydraulique selon l'invention présente au moins un dispositif (7) servant à détecter la pression réelle régnant dans la conduite hydraulique (L) ainsi qu'une unité de commande électronique (10) connectée audit dispositif ainsi qu'au moteur électrique (M) et conçue de sorte qu'elle coupe automatiquement le moteur électrique (M) lorsque la pression réelle détectée est supérieure ou égale à une pression de consigne spécifiée et met en marche automatiquement le moteur électrique lorsque la pression réelle est inférieure à la pression de consigne.
EP10788237A 2009-11-23 2010-11-22 Entraînement hydraulique Withdrawn EP2504586A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009054158A DE102009054158A1 (de) 2009-11-23 2009-11-23 Hydraulischer Antrieb
PCT/EP2010/007060 WO2011060955A2 (fr) 2009-11-23 2010-11-22 Entraînement hydraulique

Publications (1)

Publication Number Publication Date
EP2504586A2 true EP2504586A2 (fr) 2012-10-03

Family

ID=43627004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10788237A Withdrawn EP2504586A2 (fr) 2009-11-23 2010-11-22 Entraînement hydraulique

Country Status (3)

Country Link
EP (1) EP2504586A2 (fr)
DE (1) DE102009054158A1 (fr)
WO (1) WO2011060955A2 (fr)

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Publication number Priority date Publication date Assignee Title
CN102748202B (zh) * 2012-07-04 2015-02-18 徐工集团工程机械股份有限公司 液压泵马达转矩控制方法及系统
DE102018212290A1 (de) * 2018-07-24 2020-01-30 Robert Bosch Gmbh Verfahren zum Betreiben eines Bremssystems sowie Bremssystem
DE102022116812A1 (de) 2022-07-06 2024-01-11 Voith Patent Gmbh Druckhaltefunktion für Maschinenpressen

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JPH0396470A (ja) * 1989-09-08 1991-04-22 Toyota Motor Corp 蓄圧装置
JP2885903B2 (ja) * 1990-08-03 1999-04-26 本田技研工業株式会社 車両用流体圧供給装置
US5253982A (en) * 1992-11-23 1993-10-19 Vickers, Incorporated Electrohydraulic pump load control system
GB9903326D0 (en) * 1999-02-15 1999-04-07 Bryne Mekanikk As Control block for controlling the flow of fluid pressure medium to a fluid pressure operated device
JP2002066799A (ja) * 2000-08-17 2002-03-05 Applied Power Japan Kk プレス装置
DE10208589C2 (de) * 2001-12-21 2003-12-24 Ferromatik Milacron Maschb Gmb Spritzgießmaschine
DE10338551B3 (de) * 2003-08-19 2005-03-17 Cts Fahrzeug-Dachsysteme Gmbh Hydraulisches Antriebssystem für Dächer von Fahrzeugen

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Also Published As

Publication number Publication date
WO2011060955A3 (fr) 2011-10-20
DE102009054158A1 (de) 2011-05-26
WO2011060955A2 (fr) 2011-05-26

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