EP4519026B1 - Verbessertes hydraulisches system zur schwingungserzeugung - Google Patents

Verbessertes hydraulisches system zur schwingungserzeugung

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Publication number
EP4519026B1
EP4519026B1 EP23725757.1A EP23725757A EP4519026B1 EP 4519026 B1 EP4519026 B1 EP 4519026B1 EP 23725757 A EP23725757 A EP 23725757A EP 4519026 B1 EP4519026 B1 EP 4519026B1
Authority
EP
European Patent Office
Prior art keywords
pump
primary
circuit
pressure
hydraulic circuit
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.)
Active
Application number
EP23725757.1A
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English (en)
French (fr)
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EP4519026A1 (de
Inventor
Jean Heren
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.)
Poclain Hydraulics Industrie
Original Assignee
Poclain Hydraulics Industrie
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Publication of EP4519026A1 publication Critical patent/EP4519026A1/de
Application granted granted Critical
Publication of EP4519026B1 publication Critical patent/EP4519026B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll

Definitions

  • the present invention relates to a hydraulic circuit for an electric compactor.
  • Conventional vibration generation circuits commonly employ a hydraulic pump supplying one or more hydraulic motors to drive one or more eccentric rotating masses forming an imbalance, via an on/off selector.
  • the present invention thus aims to address at least partially these problems.
  • the primary hydraulic circuit is a closed loop circuit
  • the secondary hydraulic circuit is a closed loop circuit
  • the secondary hydraulic circuit includes a calibrated relief device, adapted to perform a pressure relief from a line of the secondary hydraulic circuit to a line of the secondary hydraulic circuit having a lower pressure or to a reservoir, said calibration device being conductive when the pressure is greater than or equal to a calibration pressure, and in which the controller is configured to drive the primary motor and secondary pump so that the pressure in the secondary circuit remains below the set pressure.
  • the controller is configured to drive the primary motor and secondary pump so that the pressure in the secondary circuit remains below the set pressure while maintaining a constant travel speed of the compactor.
  • the controller is configured to drive the primary motor, primary pump and secondary pump so that the vibrating elements are driven in the same direction of rotation as the moving parts, typically continuously.
  • the controller is configured to control the rotational speed of the primary motor, the displacement of the primary pump, and the displacement of the secondary pump.
  • the system further comprises a feed pump adapted to supply a feed circuit, the primary motor being adapted to drive the feed pump in rotation jointly with the primary pump and the secondary pump.
  • the system then includes a braking element disposed at a discharge of the fuel pump, the braking element being adapted to be passing or to define a restriction at the discharge of the fuel pump, so as to generate a resisting torque on a shaft of the primary motor driving in rotation the fuel pump, the primary pump and the secondary pump.
  • the braking device is a flow limiter with a fixed setting defining a flow rate beyond which it is open, said setting being set to a value greater than a pressure value corresponding to nominal system operation.
  • the system also includes a current storage element adapted to power the primary motor, in which the controller is configured to determine a state of charge of the current storage element, and to condition the actuation of the braking element on the detection of a state of charge of the current storage element greater than a predetermined threshold value.
  • the rotational speed of the primary motor, the displacement of the primary pump and the displacement of the secondary pump are controlled.
  • the primary motor is controlled so that the pressure in the secondary hydraulic circuit remains below a set pressure of a relief device, said relief device being adapted to be open and to create a flow leak when the pressure in the secondary hydraulic circuit is greater than said set pressure.
  • the primary motor is also driven so as to drive in rotation a feed pump of a feed circuit jointly with the primary pump and the secondary pump.
  • a braking element is provided at the discharge of the fuel pump, so as to selectively generate a resisting torque on the primary motor.
  • the braking device is a flow limiter having a fixed setting defining a flow rate beyond which it is open, and in which said setting is established at a value greater than a pressure value corresponding to a nominal operation of the system.
  • the primary motor is connected to a current storage unit adapted to supply the primary motor, and in which the controller determines a state of charge of the current storage unit, and conditions the actuation of the braking unit on the detection of a state of charge of the current storage unit greater than a predetermined threshold value.
  • the figures show an example of a system according to one aspect of the invention.
  • the system as represented includes a traction circuit or primary circuit 100, a vibration circuit or secondary circuit 200 and an optional feeding circuit 300.
  • the primary circuit 100 includes a primary pump 110 adapted to power one or more hydraulic motors designed to rotate the moving parts of a compactor.
  • the primary pump 110 is a variable displacement hydraulic pump.
  • the hydraulic pump 110 is connected to two hydraulic motors 120 and 130, adapted to drive the rotation of moving parts of a vehicle or machine, 125 and 135 respectively, for example, balls or rollers.
  • the nature of the moving parts varies depending on the type of machine, particularly whether it is a simple compactor, with a single roller and an axle equipped with wheels, or a tandem compactor with two rollers.
  • the primary circuit 100 as shown, is a closed-loop hydraulic circuit.
  • the secondary circuit 200 includes a secondary pump 210 connected to two hydraulic motors 220 and 230, adapted to drive rotating components designed to generate vibrations, such as eccentric masses.
  • the secondary pump 210 is a variable displacement hydraulic pump.
  • the secondary circuit 200 comprises two hydraulic motors, 220 and 230, adapted to drive the rotation of two vibrating elements, 225 and 235 respectively, which typically corresponds to a tandem roller compactor with two rollers. It is understood that in the case of a compactor with a single roller, the secondary circuit 200 may then consist of only a single hydraulic motor driving the rotation of a single vibrating element.
  • a bypass valve 240 is mounted in parallel with the hydraulic motor 230, which allows either both hydraulic motors 220 and 230 to be activated, or only the hydraulic motor 220.
  • the bypass valve 240 is typically an electrically operated valve.
  • the secondary circuit 200 as illustrated is a closed-loop hydraulic circuit.
  • the system includes an electric primary motor M.
  • the primary motor M has a drive shaft 10 adapted to jointly drive the primary pump 110 and the secondary pump 210.
  • the two pumps 110 and 210 are coupled to the same shaft 10 of the primary motor M.
  • the shaft 10 is shown partially, that is to say in an interrupted manner along its length.
  • the primary motor M is coupled to a current storage means 450 such as a battery.
  • the primary pump 110 can, for example, be a through-shaft pump, allowing coupling with the secondary pump 210.
  • each pump may include a shaft segment and a connection between the primary pump 110 and the secondary pump 210, such as a concentric shaft joint with splines, a flat coupling, a universal joint, or an Oldham joint.
  • the primary motor M can be connected to the primary pump 110 and the secondary pump 210 via a parallel connection, for example, with a belt, chain, or gear drive, enabling joint drive by the primary motor M.
  • the primary motor M will drive in rotation both the primary pump 110 and the secondary pump 210, so as to allow these two hydraulic pumps to deliver a flow to supply respectively the primary circuit 100 and the secondary circuit 200.
  • the system as proposed is also reversible, and allows for an energy recovery function when the secondary circuit 200 is stopped, as explained below.
  • the primary motor M can operate as a generator when the secondary circuit 200 is stopped.
  • the primary motor M is controlled to provide a resisting torque.
  • the vibrating elements 225 and 235 will temporarily continue to rotate due to their inertia. They will thus drive the hydraulic motors 220 and 230, which will then operate as hydraulic pumps and generate a flow. This flow will supply the secondary pump 210, which will then operate as a hydraulic motor and drive the shaft 10 of the primary motor M, which will then perform the function of an electrical generator, charging a current storage device 450, for example, an electrical accumulator such as a battery.
  • a current storage device 450 for example, an electrical accumulator such as a battery.
  • the system as proposed also includes a controller 20, typically a computer or electronic control unit commonly referred to by the acronym ECU in English.
  • a controller 20 typically a computer or electronic control unit commonly referred to by the acronym ECU in English.
  • the controller 20 is adapted to drive the primary motor M so as to provide sufficient torque to drive the primary pump 110 and the secondary pump 210 in order to achieve desired performance in terms of travel speed and vibration.
  • the primary electric motor M is driven to provide sufficient torque to simultaneously rotate the primary pump 110 and the secondary pump 210.
  • the controller 20 sums the required displacement and speed of the primary pump 110 and the secondary pump 210. For example, knowing the speed requirements of the motors 120, 130, 220, and 230, and therefore the flow requirements in the primary circuit 100 and secondary circuit 200, the controller 20 determines the displacement of the primary pump 110 and the secondary pump 210 and the speed of the motor M. In this way, it drives the motor M to provide power equal to the sum of the power required for the primary circuit 100 and the secondary circuit 200.
  • the control performed by the controller 20 is typically carried out according to information and instructions applied by a user, including the desired speed of movement and the desired vibration frequency.
  • Such a system offers significant advantages in terms of cost, size, and weight compared to systems requiring a separate motor to drive each pump.
  • By using a single electric motor for at least two pumps with different drive requirements it reduces costs by decreasing the number of electric motors and their drivers, and it also allows for a very compact installation if the pumps are coupled as close together as possible.
  • the primary motor M drives the primary pump 110 and the secondary pump 210 in rotation.
  • the modulation of the displacement of Hydraulic pumps 110 and 210 allow variation of the flow rate delivered in the primary circuit 100 and the secondary circuit 200.
  • the primary pump 110 is a manually operated pump.
  • a displacement sensor then provides a displacement value to the controller 20 so that it can control the secondary pump 210 based, in particular, on the displacement and direction of rotation of the primary pump 110.
  • a control law for the secondary pump 210 allows for sufficiently precise determination of the displacement obtained based on the setpoint applied to the control of the secondary pump 210.
  • a position sensor on a control lever operated by the user can then be used to determine the displacement.
  • a proportional electrical control can also be used, with the pump control inputs communicated to the controller 20.
  • the secondary circuit 200 can, for example, be actuated beyond a threshold value of the speed of movement of the moving parts.
  • the system typically includes a 300 feed circuit.
  • the 300 feed circuit as shown in the figures includes a 310 feed pump adapted to deliver a feed flow rate.
  • the feed pump 310 can be coupled to the shaft 10 of the primary motor M or via belts, a chain or gears so as to be driven in rotation jointly with the primary pump 110 and the secondary pump 210, in the same way as the drive between the primary pump 100 and the secondary pump 210, or the feed pump 310 can be driven in rotation by another source, for example by another motor.
  • the 300 fuel supply circuit typically includes components adapted, in particular, to draw a pilot pressure enabling the control of various hydraulic components, and to define a fuel supply pressure. These components are generally designated by the numerical reference 315; the details of these components are not the subject of the invention.
  • the 300 feed circuit is connected to the primary circuit 100 and the secondary circuit 200 via safety blocks, respectively 150 and 250.
  • Each safety block 150 and 250 performs a function of overpressure protection and priming of the associated hydraulic circuit, and optionally a function of purging the associated hydraulic circuit.
  • a priming device 152 and a discharge device 154 are defined, and for safety block 250, a priming device 252 and a discharge device 254.
  • Each priming device 152 and 252 typically includes one or more check valves and calibrated relief valves forming a pressure limiter adapted to prime the inlet of the associated hydraulic pump 110 or 210, as well as overpressure protection.
  • Each safety block 150 and 250 ensures a minimum pressure in the primary circuit 100 and the secondary circuit 200 via the feed valves 152 and 252 as soon as the feed pump 310 is activated, and releases pressure when the pressure in either of these circuits (primary 100 or secondary 200) exceeds a set value via the relief valves 154 and 254.
  • the relief valve 154 associated with the primary circuit 100 can be calibrated to a pressure of approximately 350 bar
  • the relief valve 254 associated with the secondary circuit 200 can be calibrated to a pressure of approximately 210 bar.
  • Each relief device 154 and 254 typically includes a valve or calibrated valve, configured to release fluid when the pressure in one of the lines of the associated circuit exceeds the set pressure threshold. This fluid release can, for example, be directed from a high-pressure line of the circuit to a low-pressure line of the circuit, or to reservoir R.
  • the set pressure of each relief device 154 and 254 is typically defined according to the permissible pressures of the various components of the primary 100 and secondary 200 hydraulic circuits, particularly according to the maximum permissible pressures by hydraulic motors 120, 130, 220 and 230.
  • the primary motor M and the secondary pump 210 can be controlled, typically via the controller 20, so that the pressure in the secondary circuit 200 remains below the set pressure of the discharge device, whether during system start-up, operation or shutdown.
  • controller 20 manages the speed of motor M and the displacement of primary pump 110 and secondary pump 210 to achieve accelerations that do not exceed a limit.
  • controller 20 can manage the machine's start-up, which includes acceleration of the traction combined with acceleration of the vibrating elements. It can also generate the controlled acceleration of the vibrating elements while maintaining a constant forward speed.
  • controller 20 determines at any given moment an operating point for the primary motor M that provides the necessary power, pressure, and flow rate to drive the primary pump 110 and the secondary pump 210, and optionally, to drive the feed pump. If necessary, the primary motor M can be accelerated.
  • the controller 20 adjusts the displacement of the primary pump 110 and the secondary pump 210 accordingly, for example, to maintain a constant forward speed and the desired vibration acceleration.
  • the controller 20 can adjust the speed of the primary motor M and the displacements of the primary pump 110 and the secondary pump 210 according to the pressure and flow requirements of each circuit 100, 200, 300.
  • the primary pump 110 is a manually operated hydraulic pump.
  • the controller 20 sets the speed of the primary motor M to a fixed value, thus ensuring a constant forward speed.
  • the controller 20 then adjusts the displacement of the secondary pump 210 to achieve the desired vibration acceleration.
  • This figure represents an evolution of the acceleration A of the primary motor M as a function of time t, an evolution of the rotational speed V of the primary motor M as a function of time t, and an evolution of the pressure P within the vibration circuit 200 as a function of time t in the high-pressure pipe of the vibration circuit 200.
  • Time t1 designates the sending of a command to activate the vibration circuit 200.
  • the primary motor M is set to rotate to reach a target speed Vc.
  • the acceleration of the primary motor M is typically constant and equal to a maximum permissible acceleration value Amax, which maintains a pressure P in the high-pressure line of the hydraulic circuit strictly lower than the set pressure Pt of the relief valve 254.
  • the rotational speed V of the primary motor M2 then increases steadily, along a constant slope.
  • the acceleration becomes zero.
  • the speed is maintained at the target speed Vc, and the pressure in the circuit settles at a substantially constant value, maintaining the rotational speed while compensating for various pressure losses and friction.
  • Time t3 designates the sending of a command to stop the vibration circuit 200.
  • the system then aims to bring the speed to zero as quickly as possible.
  • the primary motor M is therefore braked, with a constant deceleration equal to A maximum permissible deceleration value, for example -Amax, is defined.
  • This maximum permissible deceleration value is sized so that the pressure in the high-pressure line of the vibration circuit 200 remains below the set pressure Pt of the discharge device 254. It should be noted that the low-pressure and high-pressure lines are reversed between the acceleration and deceleration phases.
  • the rotational speed of the primary motor M then decreases steadily, along a constant slope, until it stops at time t4.
  • the controller 20 can control the motor M taking into account the power and speed requirements of the feed pump 300, while also taking into account the requirements of the primary pumps 110 and secondary pumps 210. For example, if during certain phases the need for feed increases, for example during acceleration and pressure rise phases, then the primary motor M can be accelerated to increase the feed flow, while adjusting the displacement of the primary pumps 110 and secondary pumps 210 to maintain the required speeds.
  • the controller 20 is configured to drive the primary motor M, the primary pump 110, and the secondary pump 210 so that the vibrating elements are driven in the same direction of rotation as the moving parts.
  • the vibrating elements are often supported by a rotation shaft with bearings, which are themselves supported by the inside of the roller. In this way, the relative speed of the bearings is reduced, which decreases friction and losses in the vibrating mass bearings.
  • the force exerted by driving the vibrating masses contributes to driving the compactor roller, thus improving its start-up. This also reduces bearing wear. This contributes to energy savings and increases the machine's operating time.
  • This embodiment can be applied by the controller 20, in particular, in a system operating configuration with a vibration requirement.
  • a direction of advance sensor allows the controller 20 to know the direction of rotation.
  • the system includes a braking element 330 disposed at a discharge of the feed pump 310.
  • the braking element 330 is typically a valve adapted to be either open or to define a variable restriction at the discharge of the feed pump 310.
  • the braking element 330 makes it possible to selectively generate a resisting torque on a shaft of the motor driving the feed pump 310, typically the primary motor M which also drives the primary pump 110 and the secondary pump 320 via the shaft 10.
  • the braking element 330 is then typically controlled by the controller 20.
  • the braking element 330 is typically a flow limiter having a fixed setting, strictly greater than a predetermined flow rate corresponding, for example, at a flow rate corresponding to normal or nominal use of the feed circuit 300.
  • a flow limiter having a fixed setting, strictly greater than a predetermined flow rate corresponding, for example, at a flow rate corresponding to normal or nominal use of the feed circuit 300.
  • the use of such a braking element 330 makes it possible, in particular, to apply braking torque, and thus to perform an energy dissipation function when storage devices such as batteries are already charged during braking and can therefore no longer provide engine braking.
  • the controller 20 is therefore adapted to determine the state of charge of the current storage element 450, and to condition the actuation of the braking element 330 on the detection of a state of charge of the current storage element 450 exceeding a predetermined threshold value, typically greater than or equal to 90%, greater than or equal to 95%, or equal to 100%.
  • a predetermined threshold value typically greater than or equal to 90%, greater than or equal to 95%, or equal to 100%.
  • the proposed system and method thus make it possible to optimize energy dissipation while maintaining an energy recovery and charging function of the 450 current storage unit.
  • the proposed system and method make it possible to achieve continuous braking without using vibrating elements for the energy dissipation function which are likely to generate undesirable vibrations.
  • the braking element 330 can also be of the pressure-compensated flow limiter type, that is to say, it will act automatically when the flow threshold for which it is calibrated is exceeded, without intervention from the controller 20. In such an embodiment, it is therefore understood that the primary pump 110 is not necessarily controlled by the controller 20.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Claims (11)

  1. System zum Antrieb eines Verdichters, umfassend:
    - einen primären Hydraulikkreis (100), der angepasst ist, um eine Drehung von Verschiebeorganen (125, 135) des Verdichters zu bewirken, die Verschiebeorgane (125, 135) umfassend mindestens eine Walze, der primäre Hydraulikkreis umfassend eine Primärpumpe (110), die angepasst ist, um den primären Hydraulikkreis (100) zu versorgen,
    - wobei ein sekundärer Hydraulikkreis (200) angepasst ist, um Vibrationselemente (225, 235) in Drehung zu versetzen, die angepasst sind, um Vibrationen zu erzeugen, wobei der sekundäre Hydraulikkreis (200) eine sekundäre Pumpe (210) umfasst, die angepasst ist, um den sekundären Hydraulikkreis (200) zu versorgen,
    - einen Primärmotor (M), der angepasst ist, um die Primärpumpe (110) und die Sekundärpumpe (210) gemeinsam in Drehung zu versetzen,
    wobei
    die Primärpumpe (110) und die Sekundärpumpe (210) Hydraulikpumpen mit variablem Hubvolumen sind,
    das System eine Steuerung (20) umfasst, die angepasst ist, um den Primärmotor (M) zu steuern, um ein Drehmoment bereitzustellen, das ausreichend ist, um die Primärpumpe (110) und die Sekundärpumpe (210) anzutreiben,
    dadurch gekennzeichnet, dass der Primärmotor elektrisch ist und dass das System ferner Folgendes umfasst
    eine Speisepumpe (310), die angepasst ist, um einen Speisekreislauf (300) zu versorgen, wobei der Primärmotor (M) angepasst ist, um die Speisepumpe (310) zusammen mit der Primärpumpe (110) und der Sekundärpumpe (210) in Drehung zu versetzen,
    ein Bremselement (330), das an einem Ausgang der Speisepumpe (310) angeordnet ist, wobei das Bremselement (330) angepasst ist, um an dem Ausgang der Speisepumpe (310) vorbeigeführt zu werden oder eine Beschränkung zu definieren, um auf einer Welle (10) des Primärmotors (M) ein Widerstandsmoment zu erzeugen, das die Speisepumpe (310), die Primärpumpe (110) und die Sekundärpumpe (210) in Drehung versetzt,
    ein Stromspeicherorgan (450), das angepasst ist, um den Primärmotor (M) zu versorgen, wobei die Steuerung (20) konfiguriert ist, um einen Ladezustand des Stromspeicherorgans (450) zu bestimmen und um die Betätigung des Bremsorgan (330) von der Erfassung eines Ladezustands des Stromspeicherorgans (450), der größer ist als ein vorbestimmter Schwellenwert, abhängig zu machen.
  2. System nach Anspruch 1, wobei der primäre Hydraulikkreis (100) ein geschlossener Kreislauf ist, der sekundäre Hydraulikkreis (200) ein geschlossener Kreislauf ist.
  3. System nach einem der Ansprüche 1 oder 2, wobei der sekundäre Hydraulikkreis (200) ein tariertes Entlastungsorgan (254) umfasst, das angepasst ist, um eine Druckentlastung von einer Leitung des sekundären Hydraulikkreises (200) zu einer Leitung des sekundären Hydraulikkreises (200) mit einem niedrigeren Druck oder zu einem Behälter (R) zu bewirken, wobei das Tarierorgan durchgeschaltet ist, wenn der Druck größer als oder gleich wie ein Tarierdruck ist,
    und wobei die Steuerung (20) konfiguriert ist, um den Primärmotor (M) und die Sekundärpumpe (210) zu steuern, sodass der Druck in dem Sekundärkreislauf (200) niedriger als der Einstelldruck bleibt.
  4. System nach Anspruch 3, wobei die Steuerung (20) konfiguriert ist, um den Primärmotor (M) und die Sekundärpumpe (210) zu steuern, sodass der Druck in dem Sekundärkreislauf (200) niedriger als der Einstelldruck bleibt, während eine konstante Verschiebegeschwindigkeit des Verdichters aufrechterhalten wird.
  5. System nach einem der Ansprüche 1 bis 4, wobei die Steuerung (20) konfiguriert ist, um den Primärmotor (M), die Primärpumpe (110) und die Sekundärpumpe (210) zu steuern, sodass die Vibrationselemente (225, 235) in einer gleichen Drehrichtung wie die Verschiebeorgane (125, 135) angetrieben werden.
  6. System nach einem der Ansprüche 1 bis 5, wobei die Steuerung (20) konfiguriert ist, um die Drehzahl des Primärmotors (M), das Hubvolumen der Primärpumpe (110) und das Hubvolumen der Sekundärpumpe (210) zu steuern.
  7. System nach einem der Ansprüche 1 bis 6, wobei das Bremsorgan (330) ein Durchflussbegrenzer mit fester Einstellung ist, die einen Durchfluss definiert, über den hinaus es durchgeschaltet ist, wobei die Einstellung auf einen Wert oberhalb eines Druckwerts eingestellt ist, der einem Nennbetrieb des Systems entspricht.
  8. Verfahren zur Steuerung eines Systems, umfassend: - einen primären Hydraulikkreis (100), der angepasst ist, um die Verschiebeorgane (125, 135) eines Verdichters, umfassend mindestens eine Walze, in Drehung zu versetzen, wobei der primäre Hydraulikkreis (100) eine primäre Hydraulikpumpe (110) mit variablem Hubvolumen umfasst,
    - einen sekundären Hydraulikkreis (200), der angepasst ist, um Vibrationselemente (225, 235) zum Erzeugen von Vibrationen in Drehung zu versetzen, wobei der sekundäre Hydraulikkreis (200) eine sekundäre Hydraulikpumpe (210) mit variablem Hubvolumen umfasst,
    - einen elektrischen Primärmotor (M), der angepasst ist, um die Primärpumpe (110) und die Sekundärpumpe (210) gemeinsam in Drehung zu versetzen,
    wobei das Verfahren dadurch gekennzeichnet ist, dass der Primärmotor (M) gesteuert wird, um ein Drehmoment bereitzustellen, das ausreichend ist, um die Primärpumpe (110) und die Sekundärpumpe (210) gemeinsam in Drehung zu versetzen,
    wobei der Primärmotor (M) auch gesteuert wird, um eine Speisepumpe (310) eines Speisekreises (300) gemeinsam mit der Primärpumpe (110) und der Sekundärpumpe (210) in Drehung zu versetzen,
    wobei ein Bremsorgan (330) an dem Ausgang der Speisepumpe (310) bereitgestellt ist, um selektiv ein Widerstandsmoment an dem Primärmotor (M) zu erzeugen,
    wobei der Primärmotor (M) mit einem Stromspeicherorgan (450) verbunden ist, das angepasst ist, um den Primärmotor (M) mit Strom zu versorgen,
    und wobei die Steuerung (20) einen Ladezustand des Stromspeicherorgans (450) bestimmt und die Betätigung des Bremsorgan (330) von der Erfassung eines Ladezustands des Stromspeicherorgans (450), der größer ist als ein vorbestimmter Schwellenwert, abhängig macht.
  9. Verfahren nach Anspruch 8, wobei die Drehzahl des Primärmotors (M), das Hubvolumen der Primärpumpe (110) und das Hubvolumen der Sekundärpumpe (210) gesteuert werden.
  10. Verfahren nach einem der Ansprüche 8 oder 9, wobei der Primärmotor (M) gesteuert wird, sodass der Druck in dem sekundären Hydraulikkreis (200) niedriger als ein Einstelldruck eines Druckentlastungsorgans (254) bleibt, wobei das Druckentlastungsorgan (254) angepasst ist, um durchgeschaltet zu sein und ein Druckleck zu erzeugen, wenn der Druck in dem sekundären Hydraulikkreis (200) größer als der Einstelldruck ist.
  11. Verfahren nach einem der Ansprüche 8 bis 10, wobei das Bremsorgan (330) ein Durchflussbegrenzer ist, der eine feste Einstellung aufweist, die einen Durchfluss definiert, über den hinaus es durchgeschaltet ist, und wobei die Einstellung auf einen Wert einstellt wird, der größer ist als ein Druckwert, der einem Nennbetrieb des Systems entspricht.
EP23725757.1A 2022-05-02 2023-04-28 Verbessertes hydraulisches system zur schwingungserzeugung Active EP4519026B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2204135A FR3135097B1 (fr) 2022-05-02 2022-05-02 Système hydraulique amélioré pour la génération de vibrations.
PCT/FR2023/000064 WO2023214127A1 (fr) 2022-05-02 2023-04-28 Système hydraulique amélioré pour la génération de vibrations

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EP4519026B1 true EP4519026B1 (de) 2026-03-18

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EP (1) EP4519026B1 (de)
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FR2991729B1 (fr) * 2012-06-06 2016-04-22 Poclain Hydraulics Ind Dispositif de recuperation d'energie
CN105829609B (zh) * 2013-12-16 2018-02-27 沃尔沃建筑设备公司 用于驱动振动机构的液压系统
JP6749351B2 (ja) * 2018-01-19 2020-09-02 酒井重工業株式会社 建設車両

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FR3135097B1 (fr) 2024-06-21
EP4519026A1 (de) 2025-03-12
FR3135097A1 (fr) 2023-11-03
US20250179740A1 (en) 2025-06-05
WO2023214127A1 (fr) 2023-11-09

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