EP2984241A1 - Vibrating ram arrangement, and method for operating the vibrating ram arrangement - Google Patents

Vibrating ram arrangement, and method for operating the vibrating ram arrangement

Info

Publication number
EP2984241A1
EP2984241A1 EP14722540.3A EP14722540A EP2984241A1 EP 2984241 A1 EP2984241 A1 EP 2984241A1 EP 14722540 A EP14722540 A EP 14722540A EP 2984241 A1 EP2984241 A1 EP 2984241A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
vibrator
frequency
displacement
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.)
Granted
Application number
EP14722540.3A
Other languages
German (de)
French (fr)
Other versions
EP2984241B1 (en
Inventor
Jochen Spohr
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.)
ThyssenKrupp Infrastructure GmbH
Original Assignee
ThyssenKrupp Tiefbautechnik Gmbh
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Filing date
Publication date
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Application filed by ThyssenKrupp Tiefbautechnik Gmbh filed Critical ThyssenKrupp Tiefbautechnik Gmbh
Publication of EP2984241A1 publication Critical patent/EP2984241A1/en
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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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • 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
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • 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
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B2211/20523—Internal combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/255—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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve

Definitions

  • the invention relates to a vibration ram assembly comprising a hydraulic unit, a vibrator, which is spatially separated from the hydraulic unit and connected via hydraulic hoses to the hydraulic unit and the hydraulic unit associated control, wherein the hydraulic unit comprises an internal combustion engine and a driven by the internal combustion engine hydraulic pump, wherein the vibrator having rotatably mounted imbalances and at least one adjustable hydraulic motor with variable displacement as drive the imbalances and wherein a hydraulic fluid through the hydraulic unit, the hydraulic hoses and the at least one hydraulic motor in a circuit.
  • a sensor for measuring the fluid pressure is arranged in a hydraulic circuit of the working device, which is connected to a control and regulating unit. Both the displacement of the adjustable hydraulic motor and an internal combustion engine provided for the rotation of an adjustable hydraulic pump can be controlled via this control and regulating unit.
  • EP 2 557 233 A1 deals with the problem that during a drilling or even a vibratory ram a maximum speed should not be exceeded or a predetermined frequency range should not be left.
  • the vibrator as a hydraulically driven machine is arranged via a vibration isolator, for example on the hook of a crane and spatially separated from the hydraulic unit.
  • the hydraulic power unit with the hydraulic pump is connected to the vibrator via flexible hoses and thus decoupled from the generation of the vibrations.
  • the present invention has for its object to provide a Vibrationsramman extract with the features described above, which with
  • the invention and solution of the problem is a vibrating ram assembly according to the claim 1, wherein the vibrator according to the invention comprises a device independent of the control device for adjusting the displacement of the hydraulic motor in response to a pressure within the circuit, wherein a frequency sensor for determining the frequency of the vibrator the controller is connected and wherein the controller is adapted to control the volume flow guided through the circuit as a function of the signal of the frequency sensor.
  • the rotational speed of the internal combustion engine is preferably controlled as a function of the signal of the frequency sensor.
  • an adjustment of the displacement volume of the adjustable hydraulic motor not via a central control, but via a separate means for adjusting the absorption volume automatically makes an adjustment of the absorption volume in response to a pressure within the circuit.
  • the device for adjusting the absorption volume on the vibrator particularly preferably arranged directly on the hydraulic motor of the vibrator and thus also spatially separated from the control unit associated with the hydraulic unit.
  • the device for adjusting the displacement volume can in particular be connected hydraulically to a supply line of the hydraulic motor. With a low power requirement then results in a comparatively low pressure.
  • the device for adjusting the displacement volume can have a hydraulic actuator connected to the circuit.
  • Such an actuator may in particular cause a mechanical adjustment of the hydraulic motor, wherein the actuator may be designed to the manner of a pressure cell or a spring-loaded actuating cylinder.
  • An adjustment of the intake volume is also possible via a volume flow controlled by pressure valves.
  • the displacement is continuously adjusted depending on a pressure, in particular an overpressure in a flow of the hydraulic motor. Since the displacement determines the amount of oil for a stroke or rotation of the hydraulic motor, a change in the displacement at a constant volume flow leads directly to a speed change. In the invention, however, such a change in the rotational speed of the hydraulic motor is determined by the frequency sensor which is connected to the controller.
  • the controller is adapted to change the volume flow in the circuit depending on the frequency of the vibrator, which usually corresponds to the speed of the at least one hydraulic motor. For example, an increase in the absorption volume means that a larger amount of hydraulic oil is required for a stroke or rotation of the hydraulic motor, which also results in an increase in the torque.
  • the speed of the engine can be increased accordingly. If the hydraulic pump driven by the internal combustion engine is adjustable, the displacement of the hydraulic pump can additionally or alternatively also be changed.
  • the displacement of the hydraulic motor can be gradually adjustable. If then at a predetermined point of the circuit to which the device for adjusting the displacement volume is connected, a predetermined pressure value is exceeded or undershot, the hydraulic motor is switched to a different displacement.
  • the hydraulic motor can be switched in two stages, whereby a very simple structural design is made possible. In addition, by such a simple design, a swing between the means for adjusting the intake volume and the adjustment of the volume flow can be avoided by the controller.
  • the vibration ramming is based on the principle of putting the soil in a quasi-liquid state. This is achieved by vibrating the pile when hitting the ground. The skin friction of the material to be collected is significantly reduced by the swing and thereby a rapid penetration progress is possible.
  • the oscillation frequency may be, for example, between 10 Hz and 60 Hz, in particular between 30 Hz and 50 Hz.
  • the vibration ramming furthermore has the special feature that the penetration progress depends somewhat quadratically on the frequency of the vibrator. So if at an increased resistance, a sufficiently high
  • Frequency can no longer be maintained, a further driving is no longer possible.
  • Vibration ram arrangements must therefore be designed so that they maintain a predetermined vibration frequency even under the highest permissible loads and thus also at a maximum pressure drop in the circuit.
  • a correspondingly large design of the vibrating ram arrangement results in it being over-dimensioned with lower power requirements, that is to say in particular at the beginning of a driving-in process.
  • the invention also relates to a method for operating the vibrating ram assembly described, wherein in a first operating mode with low power requirement of the vibrator, in particular at a predetermined frequency, the hydraulic motor with a first displacement Vi and the engine are operated at a first engine speed Di, wherein a first pressure pi results in the circuit, wherein an increase in the power requirement of the vibrator causes a change, in particular an increase in the pressure in the circuit, after which the means for automatically adjusting the displacement volume adjusts the hydraulic motor to increase the torque to a higher displacement S2 and a increased second engine speed V2 is set.
  • the increased second engine speed is adjusted by determining the frequency of the vibrator with the frequency sensor, the controller varying the engine speed to maintain the frequency constant, or at least within a predetermined frequency range.
  • the internal combustion engine of the hydraulic unit is at the start of a drive-in process to the vibration
  • the internal combustion engine of the vibratory ramming assembly of the present invention typically uses diesel as the fuel.
  • Fig. 1 is a vibration ram assembly
  • Fig. 2 is a simplified hydraulic circuit shown in Fig. 1
  • Fig. 1 shows a vibration ram assembly comprising a hydraulic unit 1 and a vibrator 2, which are spatially separated from each other and thus mechanically decoupled via flexible hydraulic hoses 3.
  • the hydraulic unit 1 has a hydraulic control S (see Fig. 2), wherein the operation of the controller S can be done by means of a cable or wirelessly communicating with the controller S remote control 4.
  • the hydraulic unit 1 comprises a diesel engine 5 and a hydraulic pump 6 driven by the engine 5.
  • the vibrator 2 is supported in the illustrated embodiment via a vibration isolator 7, which is suspended from a crane.
  • a ramming material 8 to be driven in is clamped in a hydraulic collet chuck 9.
  • two hydraulic motors 10 are provided, each having two oppositely rotating unbalance eleventh
  • the vibration ramming takes place in practice at a predetermined frequency or at a predetermined frequency range of the vibrator 2.
  • a comparatively low power to the vibrator 2 is needed because the friction between the rammed 8 and the ground yet is low.
  • the resistance increases, so that to maintain the predetermined frequency or the predetermined frequency range of the vibrator 2, a larger power must be provided.
  • the hydraulic unit 1 must be designed for very high powers at the end of a driving operation.
  • the vibrating ram assembly is so oversized so to speak.
  • the embodiment of a hydraulic circuit shown in Fig. 2 is provided, after which the hydraulic motors 10 and at least one provided for driving the imbalances 11 hydraulic motor 10 is adjustable with a variable displacement.
  • a device 12 mounted directly on the hydraulic motor 10 for the automatic adjustment of the absorption volume is arranged as a function of a pressure within the circuit.
  • the device 12 is connected to a flow of the hydraulic motor 10 with a branch, wherein the device 12 comprises a hydraulic actuator 13 in the form of a spring-loaded lifting cylinder.
  • the hydraulic actuator 13 By the hydraulic actuator 13, a pressure change is converted to the flow of the hydraulic motor 10 in a mechanical lifting movement, with which a direct adjustment of the hydraulic motor 10 takes place.
  • the device 12 can therefore be dispensed with a connection to the controller S for the adjustment of the displacement of the hydraulic motor 10.
  • the device 12 is particularly simple in design and converts a hydraulic pressure directly into a mechanical movement for adjusting the hydraulic motor 10, so that this arrangement operates reliably even under extreme mechanical loads of the vibrator 2. For example, when the vibrator 2 is operated at a predetermined frequency in a first low-power operation mode, the hydraulic motor 10 has a first displacement Vi, and the volume flow necessary for maintaining the predetermined frequency is provided by the hydraulic pump 6 driven by the engine 5.
  • the hydraulic motor 10 also requires a larger amount of hydraulic fluid for one revolution or one stroke.
  • a frequency sensor 14 for determining the frequency of the vibrator 2 is connected to the controller S.
  • an electronic device is not necessarily required on the vibrator 2. For example, a modulated by the frequency of the vibrator 2 pressure signal to the vibrator 2 are tapped, which is then forwarded hydraulically via an associated hydraulic hose to the hydraulic unit 1. The conversion into an electronic signal can then take place in the hydraulic unit 1.
  • the hydraulic pump 6 can also have a variable absorption volume, in which case the increase in the volume flow is also or exclusively effected by an adjustment of the hydraulic pump 6.
  • Essential to the invention is within the scope of the invention that the change in the volume flow on the one hand and the adjustment of the absorption volume of the at least one hydraulic motor 10 are independent of each other, so that no common, coordinated control is necessary.
  • Hydraulic motor 10 by the associated device 12 automatically, which would result in a lower frequency of the vibrator 2 without further control of the flow rate. Since the frequency of the vibrator 2 but separately monitored and tracked by the controller S, the volume flow is compensated by an adjustment of the displacement of the hydraulic pump 6 and / or by a change in the engine speed by the separate controller S.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to a vibrating ram arrangement comprising a hydraulic assembly (1), a vibrator (2) which is connected to the hydraulic assembly (1) via hydraulic tubes (3), and a controller (S) which is paired with the hydraulic assembly (1). The hydraulic assembly (1) has a hydraulic pump (6) which is driven by an internal combustion engine (5), and the vibrator (2) has imbalances (11) and an adjustable hydraulic engine (2) for driving the imbalances (11). A hydraulic fluid is conducted through the hydraulic assembly (1), the hydraulic tubes (3), and the hydraulic engine (10) in a circuit. A frequency sensor (14) for determining the frequency of the vibrator (2) is connected to the controller (S), and the controller (S) is designed to control a volumetric flow rate conducted through the circuit dependent on the signal of the frequency sensor (14). According to the invention, the vibrator (2) has a device (12), which is independent of the controller (S), for automatically adjusting a displacement volume of the hydraulic engine (10) dependent on a pressure within the circuit.

Description

Vibrationsrammanordnung sowie Verfahren zum Betrieb der  Vibratory ram assembly and method for operating the
Vibrationsrammanordnung  Vibrationsrammanordnung
Beschreibung: Description:
Die Erfindung betrifft eine Vibrationsrammanordnung umfassend ein Hydraulikaggregat, einen Vibrator, der räumlich von dem Hydraulikaggregat getrennt und über Hydraulikschläuche an das Hydraulikaggregat angeschlossen ist und eine dem Hydraulikaggregat zugeordnete Steuerung, wobei das Hydraulikaggregat einen Verbrennungsmotor und eine von dem Verbrennungsmotor angetriebene Hydraulikpumpe aufweist, wobei der Vibrator drehbar gelagerte Unwuchten und zumindest einen verstellbaren Hydraulikmotor mit veränderlichem Schluckvolumen als Antrieb der Unwuchten aufweist und wobei eine Hydraulikflüssigkeit durch das Hydraulikaggregat, die Hydraulikschläuche und den zumindest einen Hydraulikmotor in einem Kreislauf geführt. The invention relates to a vibration ram assembly comprising a hydraulic unit, a vibrator, which is spatially separated from the hydraulic unit and connected via hydraulic hoses to the hydraulic unit and the hydraulic unit associated control, wherein the hydraulic unit comprises an internal combustion engine and a driven by the internal combustion engine hydraulic pump, wherein the vibrator having rotatably mounted imbalances and at least one adjustable hydraulic motor with variable displacement as drive the imbalances and wherein a hydraulic fluid through the hydraulic unit, the hydraulic hoses and the at least one hydraulic motor in a circuit.
Aus der EP 2 557 233 A1 ist ein Arbeitsgerät mit hydraulischem Antrieb für Tiefbauarbeiten bekannt, wobei es sich dabei insbesondere um ein Rammoder Bohrgerät handeln kann. From EP 2 557 233 A1 an implement with hydraulic drive for civil engineering work is known, which may in particular be a ram or drill.
Um eine Anpassung des Arbeitsgerätes an die jeweiligen Leistungsanforderungen zu ermöglichen, ist in einem Hydraulikreislauf des Arbeitsgerätes ein Sensor zur Messung des Fluiddruckes angeordnet, der mit einer Steuer- und Regeleinheit verbunden ist. Über diese Steuer- und Regeleinheit sind sowohl das Schluckvolumen des verstellbaren Hydraulikmotors als auch ein für die Drehung einer verstellbaren Hydraulikpumpe vorgesehener Verbrennungsmotor steuerbar. In order to allow adaptation of the implement to the respective performance requirements, a sensor for measuring the fluid pressure is arranged in a hydraulic circuit of the working device, which is connected to a control and regulating unit. Both the displacement of the adjustable hydraulic motor and an internal combustion engine provided for the rotation of an adjustable hydraulic pump can be controlled via this control and regulating unit.
Die EP 2 557 233 A1 beschäftigt sich mit dem Problem, dass bei einem Bohren oder auch einem Vibrationsrammen eine Höchstdrehzahl nicht überschritten bzw. ein vorgegebener Frequenzbereich nicht verlassen werden sollen. Zu EP 2 557 233 A1 deals with the problem that during a drilling or even a vibratory ram a maximum speed should not be exceeded or a predetermined frequency range should not be left. To
BESTÄTIGUNGSKOPIE CONFIRMATION COPY
Beginn derartiger Tiefbauarbeiten ist die Belastung und damit auch die Leistungsanforderung noch gering, so dass von dem Verbrennungsmotor auch nur eine geringe Leistung zur Verfügung gestellt wird. Um diesen Anforderungen gerecht zu werden und insbesondere unterschiedliche Leistungen des Arbeitsgerätes bereit zu stellen, wird ein an sich bekanntes hydraulisches Getriebe eingesetzt, wobei auch die Drehzahl des Verbrennungsmotors mit berücksichtigt wird. Ähnliche Konzepte sind beispielsweise auch in DE 20 2007 014 676 A1 , DE 27 00 803 A1 , DE 2 236 134 und DE 38 06 194 beschrieben. Die vorliegende Erfindung bezieht sich konkret auf eine Vibrationsrammanordnung gemäß dem Prospekt "Müller-Vibratoren. Die perfekte Lösung zum Rammen und Ziehen", ThyssenKrupp GfT Bautechnik GmbH 5/2011. Der Vibrator als hydraulisch angetriebene Arbeitsmaschine ist dabei über einen Schwingungsisolator beispielsweise an dem Haken eines Krans angeordnet und räumlich von dem Hydraulikaggregat getrennt. Das Hydraulikaggregat mit der Hydraulikpumpe ist über flexible Schläüche an den Vibrator angeschlossen und damit von der Erzeugung der Vibrationen entkoppelt. Beginning of such civil engineering work, the load and thus the power requirement is still low, so that only a small power is provided by the internal combustion engine. To meet these requirements and in particular to provide different performance of the implement, a known per se hydraulic transmission is used, whereby the speed of the engine is taken into account. Similar concepts are described, for example, in DE 20 2007 014 676 A1, DE 27 00 803 A1, DE 2 236 134 and DE 38 06 194. Specifically, the present invention relates to a vibratory ramming arrangement according to the brochure "Müller-Vibrators: The Perfect Solution for Ramming and Pulling", ThyssenKrupp GfT Bautechnik GmbH 5/2011. The vibrator as a hydraulically driven machine is arranged via a vibration isolator, for example on the hook of a crane and spatially separated from the hydraulic unit. The hydraulic power unit with the hydraulic pump is connected to the vibrator via flexible hoses and thus decoupled from the generation of the vibrations.
Aufgrund der sehr großen mechanischen Belastungen des Vibrators wird in der Regel auf eine Steuerelektronik an dem Vibrator selbst verzichtet, wobei die Bedienung und Verstellung des Vibrators über das Hydraulikaggregat erfolgt. Selbst die Anordnung elektronischer Sensoren ist aufgrund der extremen mechanischen Belastungen problematisch und kann zu einem erhöhten Ausfallrisiko führen, weshalb der Einsatz solcher Sensoren sowie von anderen elektrischen Einrichtungen wie Stellantrieben oder dergleichen möglichst zu vermeiden ist. Due to the very large mechanical loads of the vibrator is usually dispensed with control electronics on the vibrator itself, the operation and adjustment of the vibrator is done via the hydraulic unit. Even the arrangement of electronic sensors is problematic due to the extreme mechanical stresses and can lead to an increased risk of failure, which is why the use of such sensors and other electrical equipment such as actuators or the like should be avoided as possible.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vibrationsrammanordnung mit den eingangs beschriebenen Merkmalen anzugeben, welche mit The present invention has for its object to provide a Vibrationsrammanordnung with the features described above, which with
einfachen und zuverlässigen Mitteln einen effizienten und insbesondere bei geringem Leistungsbedarf des Vibrators energetisch günstigen Betrieb ermöglicht. Gegenstand der Erfindung und Lösung der Aufgabe ist eine Vibrationsrammanordnung gemäß dem Patentanspruch 1 , wobei der Vibrator erfindungsgemäß eine von der Steuerung unabhängige Einrichtung zur Verstellung des Schluckvolumens des Hydraulikmotors in Abhängigkeit eines Druckes innerhalb des Kreislaufes aufweist, wobei ein Frequenzsensor zur Bestimmung der Frequenz des Vibrators an die Steuerung angeschlossen ist und wobei die Steuerung dazu eingerichtet ist, den durch den Kreislauf geführten Volumenstrom in Abhängigkeit des Signals des Frequenzsensors zu steuern. Dabei wird bevorzugt die Drehzahl des Verbrennungsmotors in Abhängigkeit des Signals des Frequenzsensors gesteuert. simple and reliable means an efficient and especially at low power requirements of the vibrator energetically favorable operation allows. The invention and solution of the problem is a vibrating ram assembly according to the claim 1, wherein the vibrator according to the invention comprises a device independent of the control device for adjusting the displacement of the hydraulic motor in response to a pressure within the circuit, wherein a frequency sensor for determining the frequency of the vibrator the controller is connected and wherein the controller is adapted to control the volume flow guided through the circuit as a function of the signal of the frequency sensor. In this case, the rotational speed of the internal combustion engine is preferably controlled as a function of the signal of the frequency sensor.
Erfindungsgemäß erfolgt im Gegensatz zu dem Stand der Technik eine Verstellung des Schluckvolumens des verstellbaren Hydraulikmotors nicht über eine zentrale Steuerung, sondern über eine separate Einrichtung zur Verstellung des Schluckvolumens die selbsttätig in Abhängigkeit eines Druckes innerhalb des Kreislaufes eine Anpassung des Schluckvolumens vornimmt. Entsprechend ist die Einrichtung zur Verstellung des Schluckvolumens an dem Vibrator, besonders bevorzugt direkt an dem Hydraulikmotor des Vibrators angeordnet und damit auch räumlich von der dem Hydraulikaggregat zugeordneten Steuerung getrennt ist. According to the invention, in contrast to the prior art, an adjustment of the displacement volume of the adjustable hydraulic motor not via a central control, but via a separate means for adjusting the absorption volume automatically makes an adjustment of the absorption volume in response to a pressure within the circuit. Accordingly, the device for adjusting the absorption volume on the vibrator, particularly preferably arranged directly on the hydraulic motor of the vibrator and thus also spatially separated from the control unit associated with the hydraulic unit.
Die Einrichtung zur Verstellung des Schluckvolumens kann insbesondere hydraulisch an einen Vorlauf des Hydraulikmotors angeschlossen sein. Bei einem geringen Leistungsbedarf ergibt sich dann ein vergleichsweise geringer Druck. The device for adjusting the displacement volume can in particular be connected hydraulically to a supply line of the hydraulic motor. With a low power requirement then results in a comparatively low pressure.
Um eine möglichst einfache und zuverlässige Ausgestaltung der Einrichtung zur Verstellung des Schluckvolumens zu erreichen, kann diese ein an den Kreislauf angeschlossenes hydraulisches Stellglied aufweisen. Ein solches Stellglied kann insbesondere eine mechanische Verstellung des Hydraulikmotors bewirken, wobei das Stellglied dazu nach Art einer Druckdose oder eines federbelasteten Stellzylinders ausgestaltet sei kann. Eine Verstellung des Schluckvolumens ist darüber hinausgehend auch über einen von Druckventilen gesteuerten Volumenstrom möglich. In order to achieve the simplest and most reliable embodiment of the device for adjusting the displacement volume, it can have a hydraulic actuator connected to the circuit. Such an actuator may in particular cause a mechanical adjustment of the hydraulic motor, wherein the actuator may be designed to the manner of a pressure cell or a spring-loaded actuating cylinder. An adjustment of the intake volume is also possible via a volume flow controlled by pressure valves.
Im Rahmen der Erfindung ist es grundsätzlich möglich, dass das Schluckvolumen abhängig von einem Druck, insbesondere einem Überdruck in einem Vorlauf des Hydraulikmotors, kontinuierlich verstellt wird. Da das Schluckvolumen die Ölmenge für einen Hub bzw. eine Drehung des Hydraulikmotors bestimmt, führt eine Veränderung des Schluckvolumens bei einem konstanten Volumenstrom unmittelbar zu einer Drehzahlveränderung. Im Rahmen der Erfindung wird eine solche Änderung der Drehzahl des Hydraulikmotors aber durch den Frequenzsensor bestimmt, welcher an die Steuerung angeschlossen ist. Die Steuerung ist dazu eingerichtet, abhängig von der Frequenz des Vibrators, die üblicherweise der Drehzahl des zumindest einen Hydraulikmotors entspricht, den Volumenstrom im Kreislauf zu verändern. Beispielsweise führt eine Erhöhung des Schluckvolumens dazu, dass für einen Hub bzw. eine Drehung des Hydraulikmotors eine größere Menge an Hydrauliköl benötigt wird, wodurch sich auch eine Steigerung des Drehmomentes ergibt. Um dann die Frequenz des Vibrators konstant zu halten, kann die Drehzahl des Verbrennungsmotors entsprechend erhöht werden. Wenn die von dem Verbrennungsmotor angetriebene Hydraulikpumpe verstellbar ist, kann zusätzlich oder alternativ auch das Schluckvolumen der Hydraulikpumpe verändert werden. In the context of the invention, it is basically possible that the displacement is continuously adjusted depending on a pressure, in particular an overpressure in a flow of the hydraulic motor. Since the displacement determines the amount of oil for a stroke or rotation of the hydraulic motor, a change in the displacement at a constant volume flow leads directly to a speed change. In the invention, however, such a change in the rotational speed of the hydraulic motor is determined by the frequency sensor which is connected to the controller. The controller is adapted to change the volume flow in the circuit depending on the frequency of the vibrator, which usually corresponds to the speed of the at least one hydraulic motor. For example, an increase in the absorption volume means that a larger amount of hydraulic oil is required for a stroke or rotation of the hydraulic motor, which also results in an increase in the torque. To then keep the frequency of the vibrator constant, the speed of the engine can be increased accordingly. If the hydraulic pump driven by the internal combustion engine is adjustable, the displacement of the hydraulic pump can additionally or alternatively also be changed.
Um eine weitere Vereinfachung zu erreichen, kann das Schluckvolumen des Hydraulikmotors stufenweise verstellbar sein. Wenn dann an einer vorgegebenen Stelle des Kreislaufes, an dem die Einrichtung zur Verstellung des Schluckvolumens angeschlossen ist, ein vorgegebener Druckwert überschritten bzw. unterschritten wird, wird der Hydraulikmotor auf ein anderes Schluckvolumen umgeschaltet. Insbesondere kann der Hydraulikmotor in zwei Stufen schaltbar sein, wodurch eine sehr einfache konstruktive Ausgestaltung ermöglicht wird. Darüber hinaus kann durch eine solche einfache Ausgestaltung auch ein Aufschwingen zwischen der Einrichtung zur Verstellung des Schluckvolumens und der Anpassung des Volumenstroms durch die Steuerung vermieden werden. To achieve a further simplification, the displacement of the hydraulic motor can be gradually adjustable. If then at a predetermined point of the circuit to which the device for adjusting the displacement volume is connected, a predetermined pressure value is exceeded or undershot, the hydraulic motor is switched to a different displacement. In particular, the hydraulic motor can be switched in two stages, whereby a very simple structural design is made possible. In addition, by such a simple design, a swing between the means for adjusting the intake volume and the adjustment of the volume flow can be avoided by the controller.
Die Vibrationsrammung beruht auf dem Prinzip, den Boden in einen quasi flüssigen Zustand zu versetzen. Dies wird durch das Vibrieren des Rammgutes beim Auftreffen auf den Boden erreicht. Die Mantelreibung des einzutreibenden Materials wird durch das Schwingen deutlich herabgesetzt und hierdurch wird ein zügiger Eindringfortschritt ermöglicht. Die Schwingungsfrequenz kann beispielsweise zwischen 10 Hz und 60 Hz, insbesondere zwischen 30 Hz und 50 Hz betragen. The vibration ramming is based on the principle of putting the soil in a quasi-liquid state. This is achieved by vibrating the pile when hitting the ground. The skin friction of the material to be collected is significantly reduced by the swing and thereby a rapid penetration progress is possible. The oscillation frequency may be, for example, between 10 Hz and 60 Hz, in particular between 30 Hz and 50 Hz.
Um so tiefer das Rammgut in den Boden eindringt, um so größer wird jedoch der Widerstand und die Reibung. Der Vibrator wird gleichsam durch das Rammgut "festgehalten" und kann nicht mehr frei schwingen. Die für eine Drehung der Unwuchten notwendige Antriebsleistung steigt dabei an. The deeper the pile penetrates the ground, the greater the resistance and friction. The vibrator is as it were "held" by the Rammgut and can no longer swing freely. The necessary for a rotation of the imbalance drive power increases.
Bei dem Vibrationsrammen ergibt sich des Weiteren die Besonderheit, dass der Eindringfortschritt in etwas quadratisch von der Frequenz des Vibrators abhängt. Wenn also bei einem erhöhten Widerstand eine ausreichend hohe The vibration ramming furthermore has the special feature that the penetration progress depends somewhat quadratically on the frequency of the vibrator. So if at an increased resistance, a sufficiently high
Frequenz nicht mehr aufrechterhalten werden kann, ist ein weiteres Eintreiben nicht mehr möglich. Frequency can no longer be maintained, a further driving is no longer possible.
Vibrationsrammanordnungen müssen deshalb so ausgelegt sein, dass diese auch unter den größten zulässigen Belastungen und damit auch bei einem maximalen Druckabfall in dem Kreislauf eine vorgegebene Vibrationsfrequenz aufrechterhalten. Eine entsprechend große Auslegung der Vibrationsrammanordnung führt aber andererseits dazu, dass diese bei geringeren Leistungsanforderungen, also insbesondere zu Beginn eines Eintreibvorganges, über- dimensioniert ist. Vibration ram arrangements must therefore be designed so that they maintain a predetermined vibration frequency even under the highest permissible loads and thus also at a maximum pressure drop in the circuit. On the other hand, a correspondingly large design of the vibrating ram arrangement results in it being over-dimensioned with lower power requirements, that is to say in particular at the beginning of a driving-in process.
Die Erfindung betrifft auch ein Verfahren zum Betrieb der beschriebenen Vibrationsrammanordnung, wobei in einem ersten Betriebsmodus mit geringer Leistungsanforderung des Vibrators, insbesondere bei einer vorgegebenen Frequenz, der Hydraulikmotor mit einem ersten Schluckvolumen Vi und der Verbrennungsmotor mit einer ersten Verbrennungsmotordrehzahl Di betrieben werden, wobei sich ein erster Druck pi in dem Kreislauf ergibt, wobei eine Erhöhung der Leistungsanforderung des Vibrators eine Änderung, insbesondere eine Erhöhung des Druckes in dem Kreislauf bewirkt, worauf die Einrichtung zur selbsttätigen Verstellung des Schluckvolumens den Hydraulikmotor zur Erhöhung des Drehmomentes auf ein höheres Schluckvolumen S2 verstellt und eine erhöhte zweite Verbrennungsmotordrehzahl V2 eingestellt wird. Die erhöhte zweite Verbrennungsmotordrehzahl wird dadurch eingestellt, dass die Frequenz des Vibrators mit dem Frequenzsensor bestimmt wird, wobei die Steuerung die Verbrennungsmotordrehzahl verändert, um die Frequenz konstant oder zumindest in einem vorgegebenen Frequenzbereich zu halten. The invention also relates to a method for operating the vibrating ram assembly described, wherein in a first operating mode with low power requirement of the vibrator, in particular at a predetermined frequency, the hydraulic motor with a first displacement Vi and the engine are operated at a first engine speed Di, wherein a first pressure pi results in the circuit, wherein an increase in the power requirement of the vibrator causes a change, in particular an increase in the pressure in the circuit, after which the means for automatically adjusting the displacement volume adjusts the hydraulic motor to increase the torque to a higher displacement S2 and a increased second engine speed V2 is set. The increased second engine speed is adjusted by determining the frequency of the vibrator with the frequency sensor, the controller varying the engine speed to maintain the frequency constant, or at least within a predetermined frequency range.
Durch die beschriebenen Maßnahmen wird der Verbrennungsmotor des Hydraulikaggregates zu Beginn eines Eintreibvorganges zum Vibrations- As a result of the measures described, the internal combustion engine of the hydraulic unit is at the start of a drive-in process to the vibration
rammen mit einer deutlich reduzierten Leistung betrieben, wodurch sich eine geringere Geräuschentwicklung und auch ein geringerer Verbrauch ergeben. Der Verbrennungsmotor der erfindungsgemäßen Vibrationsrammanordnung verwenden üblicherweise Diesel als Brennstoff. ram operated with a significantly reduced power, which results in a lower noise and also a lower consumption. The internal combustion engine of the vibratory ramming assembly of the present invention typically uses diesel as the fuel.
Die Erfindung wird im Folgenden anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert: The invention is explained below with reference to a drawing showing only one exemplary embodiment:
Fig. 1 eine Vibrationsrammanordnung; Fig. 1 is a vibration ram assembly;
Fig. 2 ein vereinfachter Hydraulikschaltkreis der in Fig. 1 dargestellten Fig. 2 is a simplified hydraulic circuit shown in Fig. 1
Vibrationsrammanordnung..  Vibrationsrammanordnung ..
Die Fig. 1 zeigt eine Vibrationsrammanordnung, die ein Hydraulikaggregat 1 und einen Vibrator 2 umfasst, die über flexible Hydraulikschläuche 3 räumlich getrennt voneinander und damit mechanisch entkoppelt angeordnet sind. Das Hydraulikaggregat 1 weist eine hydraulische Steuerung S auf (siehe Fig. 2), wobei die Bedienung der Steuerung S mittels einer per Kabel oder kabellos mit der Steuerung S kommunizierenden Fernbedienung 4 erfolgen kann. Das Hydraulikaggregat 1 umfasst einen mit Diesel betriebenen Verbrennungsmotor 5 sowie eine von dem Verbrennungsmotor 5 angetriebene Hydraulikpumpe 6. Fig. 1 shows a vibration ram assembly comprising a hydraulic unit 1 and a vibrator 2, which are spatially separated from each other and thus mechanically decoupled via flexible hydraulic hoses 3. The hydraulic unit 1 has a hydraulic control S (see Fig. 2), wherein the operation of the controller S can be done by means of a cable or wirelessly communicating with the controller S remote control 4. The hydraulic unit 1 comprises a diesel engine 5 and a hydraulic pump 6 driven by the engine 5.
Der Vibrator 2 ist in dem dargestellten Ausführungsbeispiel über einen Schwingungsisolator 7 abgestützt, der an einem Kran aufgehängt ist. An der Unterseite des Vibrators 2 ist ein einzutreibendes Rammengut 8 in einer hydraulischen Spannzange 9 eingespannt. The vibrator 2 is supported in the illustrated embodiment via a vibration isolator 7, which is suspended from a crane. On the underside of the vibrator 2 a ramming material 8 to be driven in is clamped in a hydraulic collet chuck 9.
In dem dargestellten Ausführungsbeispiel sind zwei Hydraulikmotoren 10 vorgesehen, die jeweils zwei entgegengesetzt rotierende Unwuchten 11 In the illustrated embodiment, two hydraulic motors 10 are provided, each having two oppositely rotating unbalance eleventh
antreiben. Durch die exzentrisch gelagerten Unwuchten 11 wird der Vibrator 2 in vertikaler Richtung in Schwingung versetzt, wobei sich durch eine gegenläufige Bewegung der Unwuchten 11 die Momente in horizontaler Richtung aufheben. Der Antrieb der Unwuchten 1 erfolgt über nicht dargestellte Zahn- räder. drive. Due to the eccentrically mounted imbalances 11 of the vibrator 2 is vibrated in the vertical direction, canceling the moments in the horizontal direction by an opposite movement of the imbalance 11. The drive of the imbalances 1 via not shown gears.
Das Vibrationsrammen erfolgt in der Praxis bei einer vorgegebenen Frequenz bzw. bei einem vorgegebenen Frequenzbereich des Vibrators 2. Zu Beginn eines Eintreibvorganges des Rammengutes 8 wird nur eine vergleichsweise geringe Leistung an dem Vibrator 2 benötigt, weil die Reibung zwischen dem Rammengut 8 und dem Untergrund noch gering ist. Mit zunehmender Eindringtiefe des Rammengutes 8 nimmt der Widerstand zu, so dass zur Aufrechterhaltung der vorgegebenen Frequenz bzw. des vorgegebenen Frequenzbereiches des Vibrators 2 eine größere Leistung bereitgestellt werden muss. Insbesondere muss das Hydraulikaggregat 1 für sehr große Leistungen am Ende eines Eintreibvorganges ausgelegt sein. The vibration ramming takes place in practice at a predetermined frequency or at a predetermined frequency range of the vibrator 2. At the beginning of a driving operation of the ram 8 only a comparatively low power to the vibrator 2 is needed because the friction between the rammed 8 and the ground yet is low. With increasing penetration depth of the ram material 8, the resistance increases, so that to maintain the predetermined frequency or the predetermined frequency range of the vibrator 2, a larger power must be provided. In particular, the hydraulic unit 1 must be designed for very high powers at the end of a driving operation.
Zu Beginn des Eintreibvorganges ist die Vibrationsrammanordnung also gewissermaßen überdimensioniert. Um dadurch bedingten Effizienzverlusten entgegenzuwirken, ist die in Fig. 2 dargestellte Ausgestaltung eines Hydraulikkreislaufes vorgesehen, wonach die Hydraulikmotoren 10 bzw. zumindest ein für den Antrieb der Unwuchten 11 vorgesehene Hydraulikmotor 10 mit einem veränderlichen Schluckvolumen verstellbar ist. At the beginning of Eintreibvorganges the vibrating ram assembly is so oversized so to speak. To counteract thereby caused efficiency losses, the embodiment of a hydraulic circuit shown in Fig. 2 is provided, after which the hydraulic motors 10 and at least one provided for driving the imbalances 11 hydraulic motor 10 is adjustable with a variable displacement.
Erfindungsgemäß ist dazu gemäß der Fig. 2 eine direkt an dem Hydraulikmotor 10 angebrachte Einrichtung 12 zur selbsttätigen Verstellung des Schluckvolumens abhängig von einem Druck innerhalb des Kreislaufes angeordnet. According to the invention, according to FIG. 2, a device 12 mounted directly on the hydraulic motor 10 for the automatic adjustment of the absorption volume is arranged as a function of a pressure within the circuit.
Gemäß dem Ausführungsbeispiel ist die Einrichtung 12 an einen Vorlauf des Hydraulikmotors 10 mit einer Abzweigung angeschlossen, wobei die Einrichtung 12 ein hydraulisches Stellglied 13 in Form eines federbelasteten Hubzylinders aufweist. Durch das hydraulische Stellglied 13 wird eine Druckänderung an dem Vorlauf des Hydraulikmotors 10 in eine mechanische Hubbewegung umgewandelt, mit der eine direkte Verstellung des Hydraulikmotors 10 erfolgt. Erfindungsgemäß kann also für die Verstellung des Schluckvolumens des Hydraulikmotors 10 auf eine Verbindung mit der Steuerung S verzichtet werden. Die Einrichtung 12 ist besonders einfach ausgestaltet und wandelt einen hydraulischen Druck direkt in eine mechanische Bewegung zur Verstellung des Hydraulikmotors 10 um, so dass diese Anordnung auch bei extremen mechanischen Belastungen des Vibrators 2 zuverlässig arbeitet. Wenn beispielsweise der Vibrator 2 in einem ersten Betriebsmodus mit geringer Leistungsanforderung bei einer vorgegebenen Frequenz betrieben wird, weist der Hydraulikmotor 10 ein erstes Schluckvolumen Vi auf, wobei der zur Aufrechterhaltung der vorgegebenen Frequenz notwendige Volumenstrom durch die von dem Verbrennungsmotor 5 angetriebene Hydraulikpumpe 6 bereitgestellt wird. According to the embodiment, the device 12 is connected to a flow of the hydraulic motor 10 with a branch, wherein the device 12 comprises a hydraulic actuator 13 in the form of a spring-loaded lifting cylinder. By the hydraulic actuator 13, a pressure change is converted to the flow of the hydraulic motor 10 in a mechanical lifting movement, with which a direct adjustment of the hydraulic motor 10 takes place. According to the invention can therefore be dispensed with a connection to the controller S for the adjustment of the displacement of the hydraulic motor 10. The device 12 is particularly simple in design and converts a hydraulic pressure directly into a mechanical movement for adjusting the hydraulic motor 10, so that this arrangement operates reliably even under extreme mechanical loads of the vibrator 2. For example, when the vibrator 2 is operated at a predetermined frequency in a first low-power operation mode, the hydraulic motor 10 has a first displacement Vi, and the volume flow necessary for maintaining the predetermined frequency is provided by the hydraulic pump 6 driven by the engine 5.
Bei der Erhöhung der Leistungsanforderung des Vibrators 2 wird an dem Vorlauf des Vibrators 2 eine Druckerhöhung von einem ersten Druck pi auf einen zweiten Druck p2 beobachtet, worauf bei einer vorgegebenen Schwelle des Druckes das hydraulische Stellglied 13 das Schluckvolumen des Hydraulikmotors 10 auf ein höheres zweites Schluckvolumen V2 verstellt. Durch die Erhöhung des Schluckvolumens auf den zweiten Wert V2 wird das Drehmoment des Hydraulikmotors 10 erhöht, so dass dieser größeren Leistungsanforderung des Vibrators 2 gerecht werden kann. When increasing the power requirement of the vibrator 2, a pressure increase from a first pressure pi to a second pressure p2 is observed at the flow of the vibrator 2, where at a predetermined threshold of pressure, the hydraulic actuator 13, the displacement of the hydraulic motor 10 to a higher second displacement V2 adjusted. By increasing the absorption volume to the second value V2, the torque of the hydraulic motor 10 is increased, so that this larger power requirement of the vibrator 2 can be accommodated.
Gleichzeitig benötigt der Hydraulikmotor 10 aber auch eine größere Menge an Hydraulikflüssigkeit für eine Umdrehung bzw. für einen Hub. Um dabei die Frequenz des Vibrators 2 auf einem vorgegebenen Wert oder in einem vorgegebenen Frequenzbereich halten zu können, ist also mit der Verstellung des Schluckvolumens auch der Volumenstrom an Hydraulikflüssigkeit in dem Kreislauf zu verändern, vorliegend also zu erhöhen. Um eine solche Veränderung zu ermöglichen, ist ein Frequenzsensor 14 zur Bestimmung der Frequenz des Vibrators 2 an die Steuerung S angeschlossen. At the same time, however, the hydraulic motor 10 also requires a larger amount of hydraulic fluid for one revolution or one stroke. In order to keep the frequency of the vibrator 2 at a predetermined value or in a predetermined frequency range, so with the adjustment of the absorption volume and the flow rate of hydraulic fluid in the circuit to change, in this case to increase. To enable such a change, a frequency sensor 14 for determining the frequency of the vibrator 2 is connected to the controller S.
Zur Bestimmung der Frequenz mittels des Frequenzsensors 14 ist an dem Vibrator 2 nicht unbedingt eine elektronische Einrichtung notwendig. Beispielsweise kann ein durch die Frequenz des Vibrators 2 moduliertes Drucksignal an dem Vibrator 2 abgegriffen werden, welches dann hydraulisch über einen zugeordneten Hydraulikschlauch an das Hydraulikaggregat 1 weitergeleitet wird. Die Umwandlung in ein elektronisches Signal kann dann in dem Hydrauiik- aggregat 1 erfolgen. For determining the frequency by means of the frequency sensor 14, an electronic device is not necessarily required on the vibrator 2. For example, a modulated by the frequency of the vibrator 2 pressure signal to the vibrator 2 are tapped, which is then forwarded hydraulically via an associated hydraulic hose to the hydraulic unit 1. The conversion into an electronic signal can then take place in the hydraulic unit 1.
Mit der Steuerung S kann eine Änderung der Verbrennungsmotordrehzahl erfolgen, um Änderungen der Frequenz des Vibrators 2 zu kompensieren. Zusätzlich oder alternativ kann auch die Hydraulikpumpe 6 ein veränderbares Schluckvolumen aufweisen, wobei dann die Erhöhung des Volumenstroms auch oder ausschließlich durch eine Verstellung der Hydraulikpumpe 6 erfolgt. Erfindungswesentlich ist im Rahmen der Erfindung, dass die Veränderung des Volumenstroms einerseits und die Verstellung des Schluckvolumens des zumindest einen Hydraulikmotors 10 unabhängig voneinander erfolgen, so dass keine gemeinsame, aufeinander abgestimmte Steuerung notwendig ist. Im Rahmen der Erfindung erfolgt die Verstellung des Schluckvolumens des With the controller S, a change in the engine speed can be made to compensate for changes in the frequency of the vibrator 2. In addition or as an alternative, the hydraulic pump 6 can also have a variable absorption volume, in which case the increase in the volume flow is also or exclusively effected by an adjustment of the hydraulic pump 6. Essential to the invention is within the scope of the invention that the change in the volume flow on the one hand and the adjustment of the absorption volume of the at least one hydraulic motor 10 are independent of each other, so that no common, coordinated control is necessary. In the context of the invention, the adjustment of the swallow volume of the
Hydraulikmotors 10 durch die zugeordnete Einrichtung 12 selbsttätig, worauf sich ohne eine weitere Steuerung des Volumenstroms eine geringere Frequenz des Vibrators 2 ergeben würde. Da die Frequenz des Vibrators 2 aber separat überwacht und durch die Steuerung S nachgeführt wird, wird durch die separate Steuerung S der Volumenstrom durch eine Verstellung des Schluckvolumens der Hydraulikpumpe 6 und/oder durch eine Änderung der Verbrennungsmotordrehzahl kompensiert. Hydraulic motor 10 by the associated device 12 automatically, which would result in a lower frequency of the vibrator 2 without further control of the flow rate. Since the frequency of the vibrator 2 but separately monitored and tracked by the controller S, the volume flow is compensated by an adjustment of the displacement of the hydraulic pump 6 and / or by a change in the engine speed by the separate controller S.

Claims

Patentansprüche: claims:
1. Vibrationsrammanordnung umfassend ein Hydraulikaggregat (1 ), einen Vibrator (2), der räumlich von dem Hydraulikaggregat (1 ) getrennt und über Hydraulikschläuche (3) an das Hydraulikaggregat (1 ) angeschlossen ist und eine dem Hydraulikaggregat (1 ) zugeordnete Steuerung (S), wobei das Hydraulikaggregat (1 ) einen Verbrennungsmotor (5) und eine von dem Verbrennungsmotor (5) angetriebene Hydraulikpumpe (6) aufweist, wobei der Vibrator (2) drehbar gelagerte Unwuchten (11 ) und zumindest einen verstellbaren Hydraulikmotor (2) mit veränderlichem Schluckvolumen als Antrieb der Unwuchten (11 ) aufweist und wobei eine Hydraulikflüssigkeit durch das Hydraulikaggregat (1), die Hydraulikschläuche (3) und den zumindest einen Hydraulikmotor (10) in einem Kreislauf geführt ist, d a d u r c h g e k e n nz e i c h n e t, dass der Vibrator (2) eine von der Steuerung (S) unabhängige Einrichtung (12) zur Verstellung des Schluckvolumens des Hydraulikmotors (10) in Abhängig eines Druckes innerhalb des Kreislaufes aufweist und dass ein Frequenzsensor (14) zur Bestimmung der Frequenz des Vibrators (2) an die Steuerung (S) angeschlossen ist, wobei die Steuerung (S) dazu eingerichtet ist, den durch den Kreislauf geführten Volumenstrom in Abhängigkeit des Signals des Frequenzsensors (14) zu steuern. A vibratory ramming arrangement comprising a hydraulic unit (1), a vibrator (2) spatially separated from the hydraulic unit (1) and connected to the hydraulic unit (1) via hydraulic hoses (3) and a controller (S) associated with the hydraulic unit (1) ), wherein the hydraulic unit (1) has an internal combustion engine (5) and a hydraulic pump (6) driven by the internal combustion engine (5), the vibrator (2) having rotatably mounted imbalances (11) and at least one variable displacement hydraulic motor (2) Suction volume as a drive of the imbalances (11) and wherein a hydraulic fluid through the hydraulic unit (1), the hydraulic hoses (3) and the at least one hydraulic motor (10) is guided in a circuit, dadurchgeken nz eichnet that the vibrator (2) a independent of the control (S) means (12) for adjusting the displacement of the hydraulic motor (10) in response to a pressure inne Circuit has and that a frequency sensor (14) for determining the frequency of the vibrator (2) to the controller (S) is connected, wherein the controller (S) is adapted to the guided through the circuit flow in dependence of the signal of Frequency sensor (14) to control.
2. Vibrationsrammanordnung nach Anspruch 1 , dadurch gekennzeichnet, dass die Einrichtung (12) zur Verstellung des Schluckvolumens hydraulisch an einen Vorlauf des Hydraulikmotors (10) angeschlossen ist. 2. Vibrationsrammanordnung according to claim 1, characterized in that the means (12) for adjusting the displacement volume is hydraulically connected to a flow of the hydraulic motor (10).
3. Vibrationsrammanordnung nach Anspruch 1 oder 2, dadurch gekenn- zeichnet, dass die Einrichtung (12) zur Verstellung des Schluckvolumens ein an den Kreislauf angeschlossenes hydraulisches Stellglied (13) aufweist. 3. Vibrationsrammanordnung according to claim 1 or 2, characterized in that the means (12) for adjusting the displacement volume has a connected to the circuit hydraulic actuator (13).
4. Vibrationsrammanordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Schluckvolumen des Hydraulikmotors (10) stufenweise, insbesondere in zwei Stufen, verstellbar ist. 4. Vibrationsrammanordnung according to one of claims 1 to 3, characterized in that the displacement of the hydraulic motor (10) in stages, in particular in two stages, is adjustable.
5. Vibrationsrammanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Steuerung (S) dazu eingerichtet ist, durch eine Änderung der Verbrennungsmotordrehzahl Änderungen der Frequenz des Vibrators (2) zu kompensieren. 5. Vibrationsrammanordnung according to one of claims 1 to 4, characterized in that the controller (S) is adapted to compensate for a change in the engine speed changes in the frequency of the vibrator (2).
6. Vibrationsrammanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, das die Hydraulikpumpe (6) des Hydraulikaggregates (1 ) ein veränderbares Schluckvolumen aufweist. 6. Vibrationsrammanordnung according to one of claims 1 to 5, characterized in that the hydraulic pump (6) of the hydraulic unit (1) has a variable displacement.
7. Verfahren zum Betrieb einer Vibrationsrammanordnung nach einem der Ansprüche 1 bis 6, wobei ein einem ersten Betriebsmodus mit geringer7. A method of operating a vibratory ram assembly according to any one of claims 1 to 6, wherein a first operating mode with a low
Leistungsanforderung des Vibrators (2) der Hydraulikmotor (10) mit einem ersten Schluckvolumen (Vi ) und der Verbrennungsmotor mit einer ersten Verbrennungsmotordrehzahl (D-|) betrieben werden, wobei sich ein erster Druck (pi) in dem Kreislauf ergibt, wobei eine Erhöhung der Leistungsanforderung des Vibrators (2) eine Änderung des Druckes in dem Kreislauf bewirkt, wobei die Einrichtung (12) zur Verstellung des Schluckvolumens den Hydraulikmotor (10) zur Erhöhung des Drehmomentes auf ein höheres Schluckvolumen (V2) verstellt und eine erhöhte zweite Verbrennungsmotordrehzahl (D2) eingestellt wird. Power demand of the vibrator (2) of the hydraulic motor (10) with a first displacement (Vi) and the internal combustion engine with a first engine speed (D- |) are operated, resulting in a first pressure (pi) in the circuit, wherein increasing the Power demand of the vibrator (2) causes a change in the pressure in the circuit, wherein the means (12) for adjusting the displacement volume, the hydraulic motor (10) to increase the torque to a higher displacement (V2) and an increased second engine speed (D2) is set.
8. Verfahren nach Anspruch 7, wobei die erhöhte zweite Verbrennungsmotordrehzahl (V2) dadurch eingestellt wird, dass die Frequenz des Vibrators (2) mit dem Frequenzsensor (14) bestimmt wird, wobei die Steuerung die Ver- 8. The method of claim 7, wherein the increased second engine speed (V2) is adjusted by determining the frequency of the vibrator (2) with the frequency sensor (14), the controller controlling the frequency of the second engine speed (V2).
brennungsmotordrehzahl verändert um die Frequenz des Vibrators (2) konstant oder in einem vorgegebenen Frequenzbereich zu halten. engine speed changed to keep the frequency of the vibrator (2) constant or in a predetermined frequency range.
EP14722540.3A 2013-04-12 2014-04-03 Vibrating driving arrangement, and method for operating the vibrating driving arrangement Active EP2984241B1 (en)

Applications Claiming Priority (2)

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DE102013103722.4A DE102013103722B4 (en) 2013-04-12 2013-04-12 Vibration ramming arrangement and method for operating the vibration ram assembly
PCT/EP2014/000888 WO2014166608A1 (en) 2013-04-12 2014-04-03 Vibrating ram arrangement, and method for operating the vibrating ram arrangement

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WO2014166608A1 (en) 2014-10-16
DE102013103722B4 (en) 2016-10-13
DE102013103722A1 (en) 2014-10-16
US20160061227A1 (en) 2016-03-03
EP2984241B1 (en) 2017-05-31
US10385883B2 (en) 2019-08-20

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