EP2984241B1 - Ensemble de battage par vibrations et procédé de fonctionnement d'un ensemble de battage par vibrations - Google Patents

Ensemble de battage par vibrations et procédé de fonctionnement d'un ensemble de battage par vibrations Download PDF

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Publication number
EP2984241B1
EP2984241B1 EP14722540.3A EP14722540A EP2984241B1 EP 2984241 B1 EP2984241 B1 EP 2984241B1 EP 14722540 A EP14722540 A EP 14722540A EP 2984241 B1 EP2984241 B1 EP 2984241B1
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EP
European Patent Office
Prior art keywords
hydraulic
vibrator
internal combustion
combustion engine
frequency
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EP14722540.3A
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German (de)
English (en)
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EP2984241A1 (fr
Inventor
Jochen Spohr
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ThyssenKrupp Infrastructure GmbH
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ThyssenKrupp Infrastructure GmbH
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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 a control unit assigned to the hydraulic unit, wherein the hydraulic unit comprises an internal combustion engine and a hydraulic pump driven by the internal combustion engine, 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.
  • EP 2 557 233 A1 is a working device with hydraulic drive known for civil engineering work, which may in particular be a piling or drilling.
  • 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.
  • the EP 2 557 233 A1 deals with the problem that during a drilling or a vibration ram a maximum speed should not be exceeded or a predetermined frequency range should not be left. To 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 for example also in DE 20 2007 014 676 A1 . DE 27 00 803 A1 . DE 2 236 134 and DE 38 06 194 described.
  • the present invention relates concretely to a vibration ramming arrangement according to the brochure " Müller vibrators.
  • 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 unit with the hydraulic pump is connected via flexible hoses to the vibrator and thus decoupled from the generation of the vibrations.
  • Such a vibration ram arrangement is also from the document EP 2 014 835A1 known. 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.
  • the present invention has for its object to provide a vibration ram assembly with the features described above, which with simple and reliable means an efficient and especially at low power requirements of the vibrator energetically favorable operation and high reliability 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.
  • 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 is not via a central control, but via a separate device for adjusting the absorption volume which automatically adjusts the absorption volume as a function of 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 leads to it being oversized at 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 arrangement 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 V 1 and the internal combustion engine with a first engine speed D 1 are operated a first pressure p 1 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, whereupon the means for automatically adjusting the displacement volume of the hydraulic motor to increase the torque to a higher Sucking volume S 2 adjusted and an increased second engine speed V 2 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 beginning of a driving operation for vibratory driving operated at a significantly reduced power, resulting in a lower noise and lower consumption.
  • the internal combustion engine of the vibratory ramming assembly of the present invention typically uses diesel as the fuel.
  • the Fig. 1 shows a Vibrationsramman himself 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 by means of a cable or wirelessly communicating with the controller S remote control 4 can be done.
  • 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 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 11 via not shown gears.
  • the vibration ramming takes place in practice at a predetermined frequency or at a predetermined frequency range of the vibrator. 2
  • 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 in Fig. 2 illustrated embodiment of a hydraulic circuit 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.
  • 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 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.
  • the hydraulic motor 10 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 V 1 , 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.
  • the change in the volume flow on the one hand and the adjustment of the displacement of the at least one hydraulic motor 10 are independent of each other, so that no common, coordinated control is necessary.
  • the adjustment of the swallow volume of the 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)

Claims (8)

  1. Ensemble de battage par vibrations comprenant un groupe hydraulique (1), un vibrateur (2), qui est spatialement séparé du groupe hydraulique (1) et qui est raccordé au groupe hydraulique (1) par des tuyaux flexibles hydrauliques (3) et une commande (S) associée au groupe hydraulique (1), dans lequel le groupe hydraulique (1) présente un moteur à combustion interne (5) et une pompe hydraulique (6) entraînée par le moteur à combustion interne (5), dans lequel le vibrateur (2) présente des balourds (11) montés de façon rotative et au moins un moteur hydraulique réglable (2) à volume d'absorption variable comme entraînement des balourds (11) et dans lequel un liquide hydraulique est transporté à travers le groupe hydraulique (1), les tuyaux flexibles hydrauliques (3) et ledit au moins un moteur hydraulique (10) en un circuit hydraulique, dans lequel un détecteur de fréquence (14) pour la détermination de la fréquence du vibrateur (2) est relié à la commande (S), dans lequel la commande (S) est conçue pour commander le débit volumétrique transporté à travers le circuit en fonction du signal du détecteur de fréquence (14), caractérisé en ce que le vibrateur (2) présente un dispositif (12) indépendant de la commande (S) pour le réglage du volume d'absorption du moteur hydraulique (10) en fonction d'une pression à l'intérieur du circuit.
  2. Ensemble de battage par vibrations selon la revendication 1, caractérisé en ce que le dispositif (12) pour le réglage du volume d'absorption est raccordé hydrauliquement à une arrivée du moteur hydraulique (10).
  3. Ensemble de battage par vibrations selon la revendication 1 ou 2, caractérisé en ce que le dispositif (12) pour le réglage du volume d'absorption présente un organe de réglage hydraulique (13) raccordé au circuit.
  4. Ensemble de battage par vibrations selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le volume d'absorption du moteur hydraulique (10) est réglable par étapes, en particulier en deux étapes.
  5. Ensemble de battage par vibrations selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la commande (S) est conçue pour compenser des variations de la fréquence du vibrateur (2) par une variation de la vitesse de rotation du moteur à combustion interne.
  6. Ensemble de battage par vibrations selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la pompe hydraulique (6) du groupe hydraulique (1) présente un volume d'absorption variable.
  7. Procédé de conduite d'un ensemble de battage par vibrations selon l'une quelconque des revendications 1 à 6, dans lequel, dans un premier mode de fonctionnement avec une faible demande de puissance du vibrateur (2), on fait fonctionner le moteur hydraulique (10) avec un premier volume d'absorption (V1) et le moteur à combustion interne avec une première vitesse de rotation (D1) du moteur à combustion interne, dans lequel il en résulte une première pression (p1) dans le circuit, dans lequel une augmentation de la demande de puissance du vibrateur (2) entraîne une variation de la pression dans le circuit, dans lequel le dispositif (12) pour le réglage du volume d'absorption règle le moteur hydraulique (10) pour l'augmentation du couple de rotation à un volume d'absorption plus élevé (V2) et on règle une deuxième vitesse de rotation accrue (D2) du moteur à combustion interne.
  8. Procédé selon la revendication 7, dans lequel on règle la deuxième vitesse de rotation accrue (V2) du moteur à combustion interne, par le fait que l'on détermine la fréquence du vibrateur (2) avec le détecteur de fréquence (14), dans lequel la commande modifie la vitesse de rotation du moteur à combustion interne afin de maintenir la fréquence du vibrateur (2) constante ou dans une plage de fréquence prédéterminée.
EP14722540.3A 2013-04-12 2014-04-03 Ensemble de battage par vibrations et procédé de fonctionnement d'un ensemble de battage par vibrations Active EP2984241B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013103722.4A DE102013103722B4 (de) 2013-04-12 2013-04-12 Vibrationsrammanordnung sowie Verfahren zum Betrieb der Vibrationsrammanordnung
PCT/EP2014/000888 WO2014166608A1 (fr) 2013-04-12 2014-04-03 Ensemble de damage par vibrations et procédé de fonctionnement d'un ensemble de damage par vibrations

Publications (2)

Publication Number Publication Date
EP2984241A1 EP2984241A1 (fr) 2016-02-17
EP2984241B1 true EP2984241B1 (fr) 2017-05-31

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EP14722540.3A Active EP2984241B1 (fr) 2013-04-12 2014-04-03 Ensemble de battage par vibrations et procédé de fonctionnement d'un ensemble de battage par vibrations

Country Status (4)

Country Link
US (1) US10385883B2 (fr)
EP (1) EP2984241B1 (fr)
DE (1) DE102013103722B4 (fr)
WO (1) WO2014166608A1 (fr)

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CN101922485B (zh) * 2010-04-13 2014-02-19 中联重科股份有限公司 液压控制系统和液压控制方法
EP2557233B2 (fr) * 2011-08-12 2022-06-01 ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH Appareil de travail doté d'un entraînement hydraulique pour travaux de construction profonds
JP5614814B2 (ja) * 2011-12-16 2014-10-29 キャタピラー エス エー アール エル 油圧作業機械
US20170037790A1 (en) * 2014-04-15 2017-02-09 Volvo Construction Equipment Ab Device for controlling engine and hydraulic pump of construction equipment and control method therefor

Also Published As

Publication number Publication date
EP2984241A1 (fr) 2016-02-17
US10385883B2 (en) 2019-08-20
DE102013103722B4 (de) 2016-10-13
DE102013103722A1 (de) 2014-10-16
WO2014166608A1 (fr) 2014-10-16
US20160061227A1 (en) 2016-03-03

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