EP3517689B1 - Hydraulic vibrator drive and a driving and/or drilling device with a hydraulic vibrator drive - Google Patents

Hydraulic vibrator drive and a driving and/or drilling device with a hydraulic vibrator drive Download PDF

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Publication number
EP3517689B1
EP3517689B1 EP19154276.0A EP19154276A EP3517689B1 EP 3517689 B1 EP3517689 B1 EP 3517689B1 EP 19154276 A EP19154276 A EP 19154276A EP 3517689 B1 EP3517689 B1 EP 3517689B1
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Prior art keywords
hydraulic
motor
vibrator drive
motors
drive
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EP19154276.0A
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German (de)
French (fr)
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EP3517689A1 (en
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Christof Gassner
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Liebherr Werk Nenzing GmbH
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Liebherr Werk Nenzing GmbH
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating
    • 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
    • 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
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

Definitions

  • the invention relates to a hydraulic vibrator drive, in particular for a piling and/or drilling device, with at least two hydraulic pumps and at least two hydraulic motors.
  • Hydraulic vibration drives known from the prior art can include constant motors or variable motors.
  • the vibrator drives usually have to keep the frequency of the vibrator constant.
  • the drive power of a vibrator is defined by the pressure in the drive.
  • the volume flow provided, which is conveyed from a carrier device via a corresponding hose package to the vibrator, is relatively high, since this defines the maximum drive power.
  • the constantly high volume flow results in correspondingly high pressure losses, which can be independent of the prevailing drive power.
  • a closer look at a vibrating process reveals that high performance is not required or called up over its entire duration and that the vibrator is used in part-load operation for not inconsiderable periods of time.
  • WO 94/01225 A1 discloses a device for exciting vibrations of a device frame in a predeterminable direction with a motorized drive and with an adjustable size of the unbalance during operation, the unbalanced masses being divided into partial unbalanced bodies. Special measures relating to the drive of the partial unbalanced bodies can reduce shock loads on the drive elements caused by reaction torques and the noise emissions that occur as a result. Applications in ram vibrators and vibrating I/fi tables, eg for molding machines.
  • the device has two hydraulic pumps and at least two hydraulic motors, the hydraulic motors being switchable in parallel or operable in series and mechanically coupled in pairs via their drive shafts.
  • the object of the invention is to provide an improved hydraulic vibrator drive that makes it easier to adapt the actual power output of the vibrator drive to a currently desired power, especially in part-load operation of a corresponding piling and/or drilling device. This should reduce the losses in partial load operation.
  • a vibrator drive is provided, in particular for a piling and/or drilling device, which comprises at least two hydraulic pumps and at least two hydraulic motors.
  • the two hydraulic motors can optionally be connected in series and are mechanically coupled via their drive shafts.
  • the mechanical coupling of the two motors makes it possible to drive the first motor and thereby only to move the second motor by means of the first motor, without the second motor having to be subjected to pressurized fluid for this purpose.
  • the motors connected in series can also both be acted upon by the series connection with hydraulic pressure fluid and thus be used at the same time to drive the vibrator.
  • the motor, which is connected in series delivers oil via the check valve provided for this purpose.
  • only the first of the two pumps can drive the first motor.
  • the second motor which is only rotated along with the first motor, can convey oil via the free-wheeling valve.
  • the volume flow returning from the motors to a tank can be divided over several return lines, which also leads to a reduction in pressure loss.
  • the second pump can be activated if the pressure or power of the vibrator drive increases. This can then drive the second motor, whereby the full power of the vibrator drive can be provided by both hydraulic motors.
  • a check valve is provided between the hydraulic motors.
  • the check valve can block the hydraulic connection or series connection of the two hydraulic motors in one direction or make it impossible. This enables operation of the vibrator drive with one or more hydraulic motors.
  • the check valve is set up to allow a hydraulic flow from the first motor to the second motor.
  • a first return line to a tank is provided between the check valve and the first motor.
  • a supply line connects the second motor to the second pump between the check valve and the second motor.
  • a second return line is connected to the supply line via a check valve.
  • the second motor is provided with a one-way valve.
  • the second return line can be throttled, in particular as desired.
  • a throttle device can be arranged between the tank and a branching point of the second return line, at which point the second return line is connected or can be connected to the supply line via the check valve.
  • At least one of the motors is a constant motor. It is also conceivable that both or all motors are constant motors.
  • the vibrator drive is set up to operate only one of the hydraulic pumps or not all of the hydraulic pumps in part-load operation. This makes it particularly easy to reduce the energy requirement in partial-load operation while at the same time keeping the construction of the vibrator drive simple.
  • the invention is also directed to a piling and/or drilling device with at least one hydraulic vibrator drive according to one of Claims 1 to 9.
  • figure 1 shows a schematic view of a hydraulic vibrator drive according to the invention, which is designed in particular for use in a piling and/or drilling device.
  • two hydraulic pumps P1, P2 are shown, by means of which one, both or optionally more of the above in the Figure shown hydraulic motors M1, M2 are operable.
  • the hydraulic motors M1, M2 can be used to move a tool W to which they are coupled.
  • the tool W can be a corresponding ramming and/or drilling device or the vibrating tool of a corresponding vibrator.
  • the two hydraulic motors M1, M2 can optionally be connected in series and are mechanically coupled, for example via their drive shafts.
  • the mechanical coupling makes it possible for the first motor M1 in particular to operate or move the second motor M2 while the second motor M2 is not or only slightly pressurized. In this way, partial-load operation of the device can be ensured, in which only the first motor M1 is acted upon by pressure fluid from the first hydraulic pump P1.
  • a check valve 1 can be provided between the two motors M1, M2, which prevents hydraulic fluid from flowing from the second motor M2 to the first motor M1.
  • the check valve 1 separates the two hydraulic pumps P1, P2 from one another in one direction of flow.
  • a first return line R1, which leads from the first motor M1 to a tank T, can in turn be provided between the check valve 1 and the first motor M1.
  • a supply line V2 can be provided between the check valve 1 and the second motor M2, which supply line connects the second motor M2 to the second pump P2.
  • This supply line V2 can be referred to as the second supply line V2, while the line between the first motor M1 and the first pump P1 can be referred to as the first supply line V1.
  • a second return line R2 can be provided on the opposite side of the second motor M2 from the check valve 1 .
  • This second return line R2 can be connected to the supply line V2 via a check valve RSV or be connectable.
  • the check valve RSV can be arranged in parallel with the second motor M2.
  • the check valve RSV is designed in such a way that it prevents a hydraulic flow from the second pump P2 directly to the second return line R2.
  • the second return line R2 can be selectively throttled.
  • a throttle 2 can be provided on the second return line R2 between the second motor M2 and the tank T connected to it via the second return line R2.
  • At least one of the motors M1, M2 can be a constant motor. According to one embodiment, both motors M1, M2 are identical or are designed as identical constant motors.
  • the vibrator drive shown is set up to actively operate only one of the two motors M1, M2 during part-load operation. In an embodiment with more than two motors, it can be provided that at least one of the motors is not operated in said part-load operation.
  • figure 2 shows an embodiment of a vibrator drive known from the prior art, although a comparable number of motors and pumps is provided as according to the invention. However, the two hydraulic motors are arranged in parallel here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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  • Structural Engineering (AREA)
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Description

Die Erfindung betrifft einen hydraulischen Rüttlerantrieb, insbesondere für ein Ramm- und/oder Bohrgerät, mit wenigstens zwei Hydraulikpumpen und wenigstens zwei Hydraulikmotoren.The invention relates to a hydraulic vibrator drive, in particular for a piling and/or drilling device, with at least two hydraulic pumps and at least two hydraulic motors.

Aus dem Stand der Technik bekannte hydraulische Rüttelantriebe können Konstantmotoren oder Verstellmotoren umfassen. Die Rüttlerantriebe haben in der Regel die Frequenz des Rüttlers konstant zu halten.Hydraulic vibration drives known from the prior art can include constant motors or variable motors. The vibrator drives usually have to keep the frequency of the vibrator constant.

Bei einem Einsatz von hydraulischen Konstantmotoren ist hierzu ein definierter Volumenstrom von entsprechenden Antriebspumpen notwendig. Die Antriebsleistung eines Rüttlers ist dabei durch den Druck im Antrieb definiert. Der dabei bereitgestellte Volumenstrom, der aus einem Trägergerät über ein entsprechendes Schlauchpaket zum Rüttler gefördert wird ist relativ hoch, da damit die maximale Antriebsleistung definiert wird.If hydraulic constant motors are used, a defined volume flow from the corresponding drive pumps is required for this. The drive power of a vibrator is defined by the pressure in the drive. The volume flow provided, which is conveyed from a carrier device via a corresponding hose package to the vibrator, is relatively high, since this defines the maximum drive power.

Durch den konstant hohen Volumenstrom entstehen entsprechend hohe Druckverluste, die unabhängig von der herrschenden Antriebsleistung sein können.The constantly high volume flow results in correspondingly high pressure losses, which can be independent of the prevailing drive power.

Bei der aus dem Stand der Technik bekannten Verwendung von Konstantmotoren bestehen daher Nachteile, dass entsprechend hohe Druckverluste bzw. Verluste bei dem Betrieb bei konstanten Volumenströmen auftreten.In the case of the use of constant motors known from the prior art, there are therefore disadvantages that correspondingly high pressure losses or losses occur during operation at constant volume flows.

Durch den Einsatz von Motoren mit veränderbaren Schluckvolumen kann der Pumpenvolumenstrom bei konstanter Drehzahl des Rüttlers verringert werden. Mittels derartiger Verstellmotoren können Verluste minimiert werden, die ansonsten beim Betrieb des entsprechenden Ramm- und/oder Bohrgeräts unter Teillast auftreten könnenBy using motors with variable displacement, the pump volume flow can be reduced while the vibrator speed remains constant. Such adjusting motors can be used to minimize losses that can otherwise occur when the corresponding piling and/or drilling device is operated under partial load

Da die Motoren allerdings den Beschleunigungen der Erregerzelle ausgesetzt sind, stellt dies besondere Herausforderungen an die Stabilität bzw. Konstruktion der Gesamtvorrichtung dar.However, since the motors are exposed to the accelerations of the exciter cell, this poses special challenges to the stability and construction of the entire device.

Bei genauer Betrachtung eines Rüttelprozesses ist zu erkennen, dass nicht über dessen gesamte Dauer hohe Leistungen gefordert bzw. abgerufen werden und dass der Rüttler über nicht unerhebliche Zeitdauern in einem Teillastbetrieb genutzt wird.A closer look at a vibrating process reveals that high performance is not required or called up over its entire duration and that the vibrator is used in part-load operation for not inconsiderable periods of time.

WO 94/01225 A1 offenbart eine Vorrichtung zur Schwingungserregung eines Vorrichtungsgestells in einer vorgebbaren Richtung mit motorischem Anbrieb und mit im Betrieb einstellbarer Größe der Unwucht, wobei die Unwuchtmassen in Teil-Unwuchtkörper unterteilt sind. Spezielle, den Antrieb der Teil-Unwuchtkörper betreffende Maßnahmen können durch Reaktions-Drehmomente verursachte Stoßbelastungen an den Antriebsorganen und im Gefolge davon auftretende Geräuschemissionen reduzieren. Anwendungen bei Rammvibratoren und Vibrier- I/fi tischen, z.B. für Formereimaschinen. Die Vorrichtung verfügt über zwei Hydraulikpumpen und wenigstens zwei Hydraulikmotoren, wobei die Hydraulikmotoren schaltbar parallel oder in Serie betreibbar und paarweise mechanisch über ihre Antriebswellen gekoppelt sind. WO 94/01225 A1 discloses a device for exciting vibrations of a device frame in a predeterminable direction with a motorized drive and with an adjustable size of the unbalance during operation, the unbalanced masses being divided into partial unbalanced bodies. Special measures relating to the drive of the partial unbalanced bodies can reduce shock loads on the drive elements caused by reaction torques and the noise emissions that occur as a result. Applications in ram vibrators and vibrating I/fi tables, eg for molding machines. The device has two hydraulic pumps and at least two hydraulic motors, the hydraulic motors being switchable in parallel or operable in series and mechanically coupled in pairs via their drive shafts.

Vor diesem Hintergrund ist es Aufgabe der Erfindung einen verbesserten hydraulischen Rüttlerantrieb bereitzustellen, der es einfacher macht, die tatsächliche Leistungsabgabe des Rüttlerantriebs an eine momentan gewünschte Leistung insbesondere auch in einem Teillastbetrieb eines entsprechenden Ramm- und/oder Bohrgeräts anzupassen. Dadurch sollen die Verluste im Teillastbetrieb reduziert werden.Against this background, the object of the invention is to provide an improved hydraulic vibrator drive that makes it easier to adapt the actual power output of the vibrator drive to a currently desired power, especially in part-load operation of a corresponding piling and/or drilling device. This should reduce the losses in partial load operation.

Diese Aufgabe wird erfindungsgemäß durch einen hydraulischen Rüttlerantrieb mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.According to the invention, this object is achieved by a hydraulic vibrator drive having the features of claim 1 . Advantageous configurations are the subject matter of the dependent claims.

Demnach ist ein Rüttlerantrieb, insbesondere für ein Ramm- und/oder Bohrgerät vorgesehen, der wenigstens zwei Hydraulikpumpen und wenigstens zwei Hydraulikmotoren umfasst. Erfindungsgemäß ist vorgesehen, dass die beiden Hydraulikmotoren wahlweise in Serie schaltbar sind und mechanisch über ihre Antriebswellen gekoppelt sind.Accordingly, a vibrator drive is provided, in particular for a piling and/or drilling device, which comprises at least two hydraulic pumps and at least two hydraulic motors. According to the invention, it is provided that the two hydraulic motors can optionally be connected in series and are mechanically coupled via their drive shafts.

Die mechanische Kopplung der beiden Motoren ermöglicht es, den ersten Motor anzutreiben und dabei den zweiten Motor mittels des ersten Motors lediglich mitzubewegen, ohne dass der zweite Motoren hierfür mit einem Druckfluid beaufschlagt werden muss. Die in Serie geschalteten Motoren können aber auch beide durch die Serienschaltung mit Hydraulikdruckfluid beaufschlagt und so gleichzeitig zum Antreiben des Rüttlers genutzt werden. Dabei fördert der in Serie geschaltete Motor ÖI über das dafür vorgesehene Rückschlagventil.The mechanical coupling of the two motors makes it possible to drive the first motor and thereby only to move the second motor by means of the first motor, without the second motor having to be subjected to pressurized fluid for this purpose. However, the motors connected in series can also both be acted upon by the series connection with hydraulic pressure fluid and thus be used at the same time to drive the vibrator. The motor, which is connected in series, delivers oil via the check valve provided for this purpose.

So kann in einem Teillastbetrieb des Rüttlerantriebs nur die erste der beiden Pumpen den ersten Motor antreiben. Der von dem ersten Motor lediglich mitgedrehte zweite Motor kann dabei ÖI über das Freilaufventil mitfördern.In a part-load operation of the vibrator drive, only the first of the two pumps can drive the first motor. The second motor, which is only rotated along with the first motor, can convey oil via the free-wheeling valve.

Der von den Motoren zu einem Tank rückfließende Volumenstrom kann über mehrere Rücklaufleitungen aufgeteilt werden, was zusätzlich zu einer Reduktion des Druckverlusts führt.The volume flow returning from the motors to a tank can be divided over several return lines, which also leads to a reduction in pressure loss.

Bei einem Druckanstieg bzw. einem Leistungsanstieg des Rüttlerantriebs kann die zweite Pumpe aktiviert werden. Diese kann sodann den zweiten Motor antreiben, wodurch die volle Leistung des Rüttlerantriebs über beide Hydraulikmotoren bereitgestellt werden kann.The second pump can be activated if the pressure or power of the vibrator drive increases. This can then drive the second motor, whereby the full power of the vibrator drive can be provided by both hydraulic motors.

Erfindungsgemäß ist zwischen den Hydraulikmotoren ein Rückschlagventil vorgesehen. Das Rückschlagventil kann die hydraulische Verbindung bzw. Serienschaltung der beiden Hydraulikmotoren in einer Richtung blockieren bzw. unmöglich machen. Hierdurch wird ein Betrieb des Rüttlerantriebs mit einem oder mit mehr Hydraulikmotoren ermöglicht.According to the invention, a check valve is provided between the hydraulic motors. The check valve can block the hydraulic connection or series connection of the two hydraulic motors in one direction or make it impossible. This enables operation of the vibrator drive with one or more hydraulic motors.

In einer besonders bevorzugen Ausführung ist denkbar, dass das Rückschlagventil dazu eingerichtet ist, einen Hydraulikstrom vom ersten Motor zum zweiten Motor zu ermöglichen.In a particularly preferred embodiment, it is conceivable that the check valve is set up to allow a hydraulic flow from the first motor to the second motor.

In einer weiteren bevorzugten Ausführung ist denkbar, dass zwischen dem Rückschlagventil und dem ersten Motor eine erste Rücklaufleitung zu einem Tank vorgesehen ist.In a further preferred embodiment, it is conceivable that a first return line to a tank is provided between the check valve and the first motor.

In einer weiteren bevorzugten Ausführung ist denkbar, dass zwischen dem Rückschlagventil und dem zweiten Motor eine Versorgungsleitung den zweiten Motor mit der zweiten Pumpe verbindet.In a further preferred embodiment, it is conceivable that a supply line connects the second motor to the second pump between the check valve and the second motor.

In einer weiteren bevorzugten Ausführung ist denkbar, dass eine zweite Rücklaufleitung über ein Rückschlagventil mit der Versorgungsleitung verbunden ist. Somit ist der zweite Motor mit einem Freilaufventil versehen.In a further preferred embodiment it is conceivable that a second return line is connected to the supply line via a check valve. Thus, the second motor is provided with a one-way valve.

In einer weiteren bevorzugten Ausführung ist denkbar, dass die zweite Rücklaufleitung insbesondere wahlweise drosselbar ist. Hierzu kann eine Drosseleinrichtung zwischen dem Tank und einem Verzweigungspunkt der zweiten Rücklaufleitung angeordnet sein, an dem die zweite Rücklaufleitung über das Rückschlagventil mit der Versorgungsleitung verbunden bzw. verbindbar ist.In a further preferred embodiment, it is conceivable that the second return line can be throttled, in particular as desired. For this purpose, a throttle device can be arranged between the tank and a branching point of the second return line, at which point the second return line is connected or can be connected to the supply line via the check valve.

In einer weiteren bevorzugten Ausführung ist denkbar, dass wenigstens einer der Motoren ein Konstantmotor ist. Denkbar ist auch, dass beide bzw. alle Motoren Konstantmotoren sind.In a further preferred embodiment it is conceivable that at least one of the motors is a constant motor. It is also conceivable that both or all motors are constant motors.

In einer weiteren bevorzugten Ausführung ist denkbar, dass der Rüttlerantrieb dazu eingerichtet ist, bei einem Teillastbetrieb nur eine der Hydraulikpumpen bzw. nicht alle der Hydraulikpumpen zu betreiben. Hierdurch ist es besonders einfach möglich, den Energiebedarf im Teillastbetrieb zu reduzieren und dabei gleichzeitig die Konstruktion des Rüttlerantriebs einfach zu halten.In a further preferred embodiment, it is conceivable that the vibrator drive is set up to operate only one of the hydraulic pumps or not all of the hydraulic pumps in part-load operation. This makes it particularly easy to reduce the energy requirement in partial-load operation while at the same time keeping the construction of the vibrator drive simple.

Die Erfindung ist ferner auf ein Ramm- und/oder Bohrgerät mit wenigstens einem hydraulischen Rüttlerantrieb nach einem der Ansprüche 1 bis 9 gerichtet.The invention is also directed to a piling and/or drilling device with at least one hydraulic vibrator drive according to one of Claims 1 to 9.

Weitere Einzelheiten und Vorteile der Erfindung sind anhand der in den Figuren beispielhaft gezeigten Ausführungen erläutert. Dabei zeigen:

Figur 1:
eine schematische Ansicht eines erfindungsgemäßen hydraulischen Rüttlerantriebs.
Figur 2:
eine schematische Ansicht eines aus dem Stand der Technik bekannten hydraulischen Rüttlerantriebs.
Further details and advantages of the invention are explained using the exemplary embodiments shown in the figures. show:
Figure 1:
a schematic view of a hydraulic vibrator drive according to the invention.
Figure 2:
a schematic view of a hydraulic vibrator drive known from the prior art.

Figur 1 zeigt eine schematische Ansicht eines erfindungsgemäßen hydraulischen Rüttlerantriebs, der insbesondere zum Einsatz in einem Ramm- und/oder Bohrgerät ausgebildet ist. Im unteren Bereich der Figur 1 sind zwei Hydraulikpumpen P1, P2 gezeigt, mittels derer einer, beide oder gegebenenfalls mehr der weiter oben in der Figur gezeigten Hydraulikmotoren M1, M2 betreibbar sind. Die Hydraulikmotoren M1, M2 können zum Bewegen eines Werkzeugs W genutzt werden, mit dem sie gekoppelt sind. Bei dem Werkzeug W kann es sich um ein entsprechendes Ramm- und/oder Bohrgerät bzw. um das Rüttelwerkzeug eines entsprechenden Rüttlers handeln. figure 1 shows a schematic view of a hydraulic vibrator drive according to the invention, which is designed in particular for use in a piling and/or drilling device. In the bottom of the figure 1 two hydraulic pumps P1, P2 are shown, by means of which one, both or optionally more of the above in the Figure shown hydraulic motors M1, M2 are operable. The hydraulic motors M1, M2 can be used to move a tool W to which they are coupled. The tool W can be a corresponding ramming and/or drilling device or the vibrating tool of a corresponding vibrator.

Erfindungsgemäß ist vorgesehen, dass die beiden Hydraulikmotoren, M1, M2 wahlweise in Serie schaltbar sind und mechanisch beispielsweise über ihre Antriebswellen gekoppelt sind. Durch die mechanische Kopplung ist es möglich, dass insbesondere der erste Motor M1 den zweiten Motor M2 betreibt bzw. mitbewegt, während der zweite Motor M2 nicht oder nur geringfügig mit einem Druckfluid beaufschlagt ist. Hierdurch kann ein Teillastbetrieb der Vorrichtung gewährleistet werden, bei dem lediglich der erste Motor M1 mit Druckfluid aus der ersten Hydraulikpumpe P1 beaufschlagt ist.According to the invention, it is provided that the two hydraulic motors M1, M2 can optionally be connected in series and are mechanically coupled, for example via their drive shafts. The mechanical coupling makes it possible for the first motor M1 in particular to operate or move the second motor M2 while the second motor M2 is not or only slightly pressurized. In this way, partial-load operation of the device can be ensured, in which only the first motor M1 is acted upon by pressure fluid from the first hydraulic pump P1.

Zwischen den beiden Motoren M1, M2 kann ein Rückschlagventil 1 vorgesehen sein, das einen Hydraulikfluidfluss vom zweitem Motor M2 zum ersten Motor M1 verhindert. Das Rückschlagventil 1 trennt die beiden Hydraulikpumpen P1, P2 in einer Strömungsrichtung voneinander. Zwischen dem Rückschlagventil 1 und dem erstem Motor M1 ist wiederum eine erste Rücklaufleitung R1 vorsehbar, die vom ersten Motor M1 zu einem Tank T führt.A check valve 1 can be provided between the two motors M1, M2, which prevents hydraulic fluid from flowing from the second motor M2 to the first motor M1. The check valve 1 separates the two hydraulic pumps P1, P2 from one another in one direction of flow. A first return line R1, which leads from the first motor M1 to a tank T, can in turn be provided between the check valve 1 and the first motor M1.

Auf der anderen Seite des Rückschlagventils 1 ist zwischen dem Rückschlagventil 1 und dem zweiten Motor M2 eine Versorgungsleitung V2 vorsehbar, die den zweiten Motor M2 mit der zweiten Pumpe P2 verbindet. Diese Versorgungsleitung V2 kann als zweite Versorgungsleitung V2 bezeichnet werden, während die Leitung zwischen dem ersten Motor M1 und der ersten Pumpe P1 als erste Versorgungsleitung V1 bezeichnet werden kann.On the other side of the check valve 1, a supply line V2 can be provided between the check valve 1 and the second motor M2, which supply line connects the second motor M2 to the second pump P2. This supply line V2 can be referred to as the second supply line V2, while the line between the first motor M1 and the first pump P1 can be referred to as the first supply line V1.

Eine zweite Rücklaufleitung R2 ist auf der dem Rückschlagventil 1 gegenüberliegenden Seite des zweiten Motors M2 vorsehbar. Diese zweite Rücklaufleitung R2 kann über ein Rückschlagventil RSV mit der Versorgungsleitung V2 verbunden bzw. verbindbar sein. Das Rückschlagventil RSV kann parallel zum zweiten Motor M2 angeordnet sein. Das Rückschlagventil RSV ist dabei so ausgebildet, dass es einen Hydraulikfluss von der zweiten Pumpe P2 direkt zur zweiten Rücklaufleitung R2 verhindert.A second return line R2 can be provided on the opposite side of the second motor M2 from the check valve 1 . This second return line R2 can be connected to the supply line V2 via a check valve RSV or be connectable. The check valve RSV can be arranged in parallel with the second motor M2. The check valve RSV is designed in such a way that it prevents a hydraulic flow from the second pump P2 directly to the second return line R2.

Die zweite Rücklaufleitung R2 ist insbesondere wahlweise drosselbar. Hierzu kann eine Drossel 2 zwischen dem zweiten Motor M2 und dem über die zweite Rücklaufleitung R2 mit ihm verbundenen Tank T an der zweiten Rücklaufleitung R2 vorgesehen sein.In particular, the second return line R2 can be selectively throttled. For this purpose, a throttle 2 can be provided on the second return line R2 between the second motor M2 and the tank T connected to it via the second return line R2.

Wenigstens einer der Motoren M1, M2 kann ein Konstantmotor sein. Gemäß einer Ausführung sind beide Motoren M1, M2, identisch bzw. als identische Konstantmotoren ausgebildet sind.At least one of the motors M1, M2 can be a constant motor. According to one embodiment, both motors M1, M2 are identical or are designed as identical constant motors.

Der gezeigte Rüttlerantrieb ist dazu eingerichtet, bei einem Teillastbetrieb nur einen der beiden Motoren M1, M2 aktiv zu betreiben. In einer Ausführung mit mehr als zwei Motoren kann in dem besagten Teillastbetrieb vorgesehen sein, dass wenigstens einer der Motoren nicht betrieben wird.The vibrator drive shown is set up to actively operate only one of the two motors M1, M2 during part-load operation. In an embodiment with more than two motors, it can be provided that at least one of the motors is not operated in said part-load operation.

Figur 2 zeigt eine aus dem Stand der Technik bekannte Ausführung eines Rüttlerantriebs wobei zwar eine vergleichbare Anzahl von Motoren und Pumpen wie erfindungsgemäß vorgesehen ist. Jedoch sind die beiden Hydraulikmotoren hier parallel angeordnet. figure 2 shows an embodiment of a vibrator drive known from the prior art, although a comparable number of motors and pumps is provided as according to the invention. However, the two hydraulic motors are arranged in parallel here.

Claims (9)

  1. A hydraulic vibrator drive having at least two hydraulic pumps (P1, P2) and at least two hydraulic motors (M1, M2), wherein the two hydraulic motors (M1, M2) can be operated either in parallel or in series and are mechanically coupled by means of their drive shafts, characterised in that a check valve (1) is provided between the hydraulic motors (M1, M2).
  2. The hydraulic vibrator drive according to claim 1, characterised in that the check valve (1) is designed to allow a hydraulic flow from the first motor (M1) to the second motor (M2).
  3. The hydraulic vibrator drive at least according to claim 1, characterised in that between the check valve (1) and the first motor (M1) there is provided a first return line (R1), which leads to a tank (T).
  4. The hydraulic vibrator drive at least according to claim 1, characterised in that between the check valve (1) and the second motor (M2) a supply line (V2) connects the second motor (M2) to the second pump (P2).
  5. The hydraulic vibrator drive at least according to claim 4, characterised in that a second return line (R2) is connected to the supply line (V2) via a check valve (RSV).
  6. The hydraulic vibrator drive at least according to claim 5, characterised in that the second return line (R2) can optionally be throttled.
  7. The hydraulic vibrator drive according to one of the preceding claims, characterised in that at least one of the motors (M1, M2) is a fixed-displacement motor.
  8. The hydraulic vibrator drive according to one of the preceding claims, characterised in that the vibrator drive is designed to operate only one of the hydraulic pumps (P1, P2), or not all of the hydraulic pumps (P1, P2), in a part-load operation and/or to reduce the volumetric flow rate of at least one pump (P2).
  9. A pile-driving and/or drilling device having at least one hydraulic vibrator drive according to one of claims 1 to 8.
EP19154276.0A 2018-01-30 2019-01-29 Hydraulic vibrator drive and a driving and/or drilling device with a hydraulic vibrator drive Active EP3517689B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202018100511.1U DE202018100511U1 (en) 2018-01-30 2018-01-30 Hydraulic vibrator drive as well as a piling and / or drilling rig with a hydraulic vibrator drive

Publications (2)

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EP3517689A1 EP3517689A1 (en) 2019-07-31
EP3517689B1 true EP3517689B1 (en) 2022-08-24

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Application Number Title Priority Date Filing Date
EP19154276.0A Active EP3517689B1 (en) 2018-01-30 2019-01-29 Hydraulic vibrator drive and a driving and/or drilling device with a hydraulic vibrator drive

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DE (1) DE202018100511U1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301368A1 (en) * 1992-07-03 1994-01-05 Gedib Ingbuero Innovation Device and method for exciting vibrations
DE4439170A1 (en) * 1994-11-06 1996-05-09 Bald Hubert Ram vibrator to produce harmonised vibrations
US6504278B1 (en) * 1998-05-08 2003-01-07 Gedib Ingenieurburo Und Innovationsberatung Gmbh Regulating device for adjusting the static moment resulting from unbalanced mass vibration generators
NL1030015C2 (en) * 2005-09-23 2007-03-26 Internat Construction Equipmen Vibratory method for sinking or removing e.g. pile, includes valve for altering liquid flow ratio for hydraulic motors
EP3165290B1 (en) * 2015-11-06 2021-04-07 BAUER Maschinen GmbH Vibration generator and method for inserting a pile element into the ground

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DE202018100511U1 (en) 2019-05-03
EP3517689A1 (en) 2019-07-31

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