EP2871288B1 - Diesel pile driver - Google Patents

Diesel pile driver Download PDF

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Publication number
EP2871288B1
EP2871288B1 EP13192602.4A EP13192602A EP2871288B1 EP 2871288 B1 EP2871288 B1 EP 2871288B1 EP 13192602 A EP13192602 A EP 13192602A EP 2871288 B1 EP2871288 B1 EP 2871288B1
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EP
European Patent Office
Prior art keywords
cylinder
piston
diesel
fuel tank
fuel
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.)
Not-in-force
Application number
EP13192602.4A
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German (de)
French (fr)
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EP2871288A1 (en
Inventor
Leopold Jerch
Matthias Heichel
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.)
Delmag GmbH and Co KG
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Delmag GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Delmag GmbH and Co KG filed Critical Delmag GmbH and Co KG
Priority to EP13192602.4A priority Critical patent/EP2871288B1/en
Priority to US14/533,162 priority patent/US20150129270A1/en
Priority to CN201410633641.0A priority patent/CN104631456A/en
Publication of EP2871288A1 publication Critical patent/EP2871288A1/en
Application granted granted Critical
Publication of EP2871288B1 publication Critical patent/EP2871288B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/12—Drivers with explosion chambers
    • E02D7/125—Diesel drivers

Definitions

  • the invention relates to a diesel ram with a cylinder, a piston displaceably guided in the cylinder and a striking piece displaceably guided in the cylinder according to the preamble of patent claim 1.
  • Diesel rams also referred to as diesel hammers or diesel bears, are used in particular for foundation work of the construction industry for driving in piles of all kinds, such as concrete pillars, iron girders, sheet pile wall elements or the like in a building ground.
  • the piston is pulled upwards by means of a notching device inside the cylinder and disengaged at a certain height, whereby it falls down on the striking piece under the action of gravity.
  • a fuel pump is actuated by the piston, via which a supply of fuel, in particular of diesel oil takes place.
  • the fuel of the diesel rammer is stored in a tank which is externally welded to the cylinder of the diesel ram and which is connected via a line to the fuel pump.
  • the air in the combustion chamber of the cylinder is compressed and thereby heated so that ignited in the combustion chamber fuel / air mixture, whereupon it burns explosively.
  • the piston is hurled upward again for a new working cycle; at the same time the pile is driven over the hammer in the ground.
  • Diesel rams of the aforementioned type as described for example in the EP 1 828 488 B1 has been described, have proven in practice because of their simple structure and the associated high reliability. In operation, however, such diesel rams are very noisy and can cause a noise level of 100 decibels (A) and more.
  • the invention aims to remedy this situation.
  • the invention has for its object to provide a diesel ram of the aforementioned type, the noise emission is reduced. According to the invention, this object is achieved by a diesel rammer having the features of the characterizing part of patent claim 1.
  • a diesel ram of the aforementioned type is provided, the noise emission is reduced.
  • the fuel tank laterally welded to the cylinder in the prior art represents a significant resonance body, which contributes significantly to the noise emission of the diesel rams.
  • the decoupling of the tank from the cylinder causes a significant reduction of the noise emission of the diesel rams.
  • two webs are arranged on the outside of the cylinder parallel to each other, on which the tank is fastened via vibration elements.
  • an efficient decoupling of the tank is achieved by the cylinder.
  • the vibration damper occurring vibrations of the tank are damped.
  • the vibration elements are formed as elastomer or rubber components. Such vibration dampers are available in various designs and modes of operation in the prior art.
  • the diesel ram selected as an exemplary embodiment comprises a cylinder 1 which is open on both sides and which can regularly have a length of 3 to 8 meters and a diameter of 0.2 to 1.5 meters.
  • a piston 2 is slidably disposed in the cylinder 1 a.
  • a coaxial to this impact piece 3 engages slidably in the open lower end of the cylinder 1 a.
  • an annular bearing unit 9 is fixed, in which a middle shaft portion 31 of the hammering piece 3 is guided tightly and displaceably, which has a relation to the inner diameter of the cylinder 1 reduced outer diameter.
  • the diesel ram is mounted vertically displaceable over arranged on the cylinder 1 guide jaws 13 along a leader 8.
  • a striking plate 32 located below the cylinder 1, the outwardly directed lower convex boundary surface 33 cooperating in operation with the upper end of a driven-in pile material to be driven in.
  • a piston portion 34 is formed with a plurality of circumferential, axially spaced sealing rings which run on the inner circumferential surface 11 of the cylinder 1.
  • a combustion chamber 12 is limited together with the underside of the piston 2 and the inner circumferential surface 11 of the cylinder 1.
  • the combustion chamber 12 of the cylinder 1 facing end face of the hammer 3 is ground flat with a shallow fuel well.
  • a damping ring 91 is arranged between the impact plate 32 of the hammer 3 and the bearing unit 9 of the cylinder 1.
  • a further damping ring 92 is arranged adjacent to the bearing unit 9 between the upper side of the bearing unit 9 and the underside of the piston portion 34 of the hammer 3.
  • a mass portion 2 is formed, which extends in the upper portion of the cylinder 1 inside.
  • an injection device 4 is arranged, which comprises a fuel pump 41 which is connected via a line 43 to the injection nozzle 42.
  • the inlet of the fuel pump 41 is fed via a fuel tank 5 with diesel oil.
  • the fuel tank 5 is formed in the embodiment as a sheet metal container, on whose opposite upper and lower sides in each case a flange 51 is integrally formed.
  • the fuel tank 5 is arranged between two mutually parallel arranged on the cylinder 1, circumferential webs 14, which are each attached via elbows 15 to the cylinder 1.
  • the tank 5 is connected to the webs 14 of the cylinder 1 via vibration elements 6, as in FIG. 2 shown. Due to the vertical arrangement of the vibration elements 6 between the respective horizontally extending webs 14 and the flanges 51 of the fuel tank 5 arranged parallel thereto, the vibration elements 6 are positioned in the main vibration direction of the piston 2, whereby a particularly effective vibration damping is achieved.
  • the vibration elements 6 are essentially made of rubber.
  • the fuel pump 41 which is connected to the fuel tank 5 via the line 43, has a prestressed pump lever 44 projecting into the interior of the cylinder 1, via which it is driven when the falling piston 2 passes.
  • the injection nozzle 42 is designed and aligned such that the discharged fuel is injected in a substantially continuous jet approximately centrally on the end face of the hammer 3.
  • a lubricant pump 7 is arranged on the cylinder 1, which is connected to distributed in the circumferential direction of the cylinder 1 lubricant nozzles.
  • lubricant nozzles lubricant between the piston 2 and the inner circumferential surface 11 of the cylinder 1 is given.
  • the diesel ram described above operates as follows: In the initial state of the piston 2 is raised via the - not shown - release device in an upper position. After notching it falls from there under the action of gravity down, closes the working nozzle 16 and actuates with its end face 21 the pump lever 44 of the injector 4, which is sprayed through the injector 42 fuel to the fuel bowl of the hammer 3.
  • the pump lever 44 of the injector 4 is sprayed through the injector 42 fuel to the fuel bowl of the hammer 3.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

Die Erfindung betrifft eine Dieselramme mit einem Zylinder, einem in dem Zylinder verschiebbar geführten Kolben und einem in dem Zylinder verschiebbar geführten Schlagstück nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a diesel ram with a cylinder, a piston displaceably guided in the cylinder and a striking piece displaceably guided in the cylinder according to the preamble of patent claim 1.

Dieselrammen, auch als Dieselhammer oder Dieselbären bezeichnet, kommen insbesondere bei Gründungsarbeiten der Bauindustrie zum Einrammen von Pfählen aller Art, wie Betonpfeiler, Eisenträger, Spundwandelementen oder dergleichen in einem Baugrund zum Einsatz.Diesel rams, also referred to as diesel hammers or diesel bears, are used in particular for foundation work of the construction industry for driving in piles of all kinds, such as concrete pillars, iron girders, sheet pile wall elements or the like in a building ground.

Zum Starten einer solchen Dieselramme wird der Kolben mithilfe einer Ausklinkvorrichtung innerhalb des Zylinders nach oben gezogen und in einer bestimmten Höhe ausgeklinkt, wodurch er unter Einwirkung der Schwerkraft nach unten auf das Schlagstück fällt. Beim Niederfallen wird durch den Kolben eine Kraftstoffpumpe betätigt, über welche eine Zuführung von Kraftstoff, insbesondere von Dieselöl erfolgt. Der Kraftstoff der Dieselramme ist in einem Tank bevorratet, der außen an dem Zylinder der Dieselramme angeschweißt ist und der über eine Leitung mit der Kraftstoffpumpe verbunden ist. Durch den niederfallenden Kolben wird die im Brennraum des Zylinders befindliche Luft komprimiert und hierdurch derart erhitzt, dass sich das im Brennraum vorliegende Kraftstoff/Luft-Gemisch entzündet, worauf es explosionsartig verbrennt. Durch die hierbei frei werdende Explosionsenergie wird zum einen der Kolben für einen neuen Arbeitszyklus wieder nach oben geschleudert; gleichzeitig wird das Rammgut über das Schlagstück in den Boden getrieben.To start such a diesel ram, the piston is pulled upwards by means of a notching device inside the cylinder and disengaged at a certain height, whereby it falls down on the striking piece under the action of gravity. When falling, a fuel pump is actuated by the piston, via which a supply of fuel, in particular of diesel oil takes place. The fuel of the diesel rammer is stored in a tank which is externally welded to the cylinder of the diesel ram and which is connected via a line to the fuel pump. By the falling piston, the air in the combustion chamber of the cylinder is compressed and thereby heated so that ignited in the combustion chamber fuel / air mixture, whereupon it burns explosively. As a result of the explosion energy released in this process, the piston is hurled upward again for a new working cycle; at the same time the pile is driven over the hammer in the ground.

Dieselrammen der vorgenannten Art, wie sie beispielsweise in der EP 1 828 488 B1 beschrieben ist, haben sich aufgrund ihres einfachen Aufbaus und der damit verbundenen hohen Zuverlässigkeit in der Praxis bewährt. Im Betrieb sind solche Dieselrammen jedoch sehr laut und können einen Lärmpegel von 100 Dezibel (A) und mehr verursachen.Diesel rams of the aforementioned type, as described for example in the EP 1 828 488 B1 has been described, have proven in practice because of their simple structure and the associated high reliability. In operation, however, such diesel rams are very noisy and can cause a noise level of 100 decibels (A) and more.

Hier will die Erfindung Abhilfe schaffen. Der Erfindung liegt die Aufgabe zugrunde, eine Dieselramme der vorgenannten Art bereitzustellen, deren Lärmemission vermindert ist. Gemäß der Erfindung wird diese Aufgabe durch eine Dieselramme mit den Merkmalen des kennzeichnenden Teils des Patentanspruchs 1 gelöst.The invention aims to remedy this situation. The invention has for its object to provide a diesel ram of the aforementioned type, the noise emission is reduced. According to the invention, this object is achieved by a diesel rammer having the features of the characterizing part of patent claim 1.

Mit der Erfindung ist eine Dieselramme der vorgenannten Art bereitgestellt, deren Lärmemission vermindert ist. Dadurch, dass der Kraftstofftank an dem Zylinder elastisch gelagert ist, ist dieser vom Zylinderkörper entkoppelt. Überraschend hat sich gezeigt, dass der im Stand der Technik seitlich mit dem Zylinder verschweißte Kraftstofftank einen signifikanten Resonanzkörper darstellt, der in erheblichem Maße zur Lärmemission der Dieselramme beiträgt. Durch die Entkopplung des Tanks von dem Zylinder ist eine signifikante Verminderung der Lärmemission der Dieselramme bewirkt.With the invention, a diesel ram of the aforementioned type is provided, the noise emission is reduced. Characterized in that the fuel tank is elastically mounted on the cylinder, this is decoupled from the cylinder body. Surprisingly, it has been found that the fuel tank laterally welded to the cylinder in the prior art represents a significant resonance body, which contributes significantly to the noise emission of the diesel rams. The decoupling of the tank from the cylinder causes a significant reduction of the noise emission of the diesel rams.

In Weiterbildung der Erfindung sind an dem Zylinder außen parallel zueinander zwei Stege angeordnet, an denen der Tank über Schwingungselemente befestigt ist. Hierdurch ist eine effiziente Entkopplung des Tanks von dem Zylinder erzielt. Durch die Schwingungsdämpfer werden die auftretenden Schwingungen des Tanks gedämpft. Vorzugsweise sind die Schwingungselemente als Elastomer- oder Gummibauteile ausgebildet. Derartige Schwingungsdämpfer sind in unterschiedlichsten Ausführungen und Wirkungsweisen im Stand der Technik verfügbar.In a further development of the invention, two webs are arranged on the outside of the cylinder parallel to each other, on which the tank is fastened via vibration elements. As a result, an efficient decoupling of the tank is achieved by the cylinder. By the vibration damper occurring vibrations of the tank are damped. Preferably, the vibration elements are formed as elastomer or rubber components. Such vibration dampers are available in various designs and modes of operation in the prior art.

Andere Weiterbildungen und Ausgestaltungen der Erfindung sind in den übrigen Unteransprüchen angegeben. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und nachfolgend im Einzelnen beschrieben. Es zeigen:

Figur 1
die schematische Darstellung einer Dieselramme;
Figur 2
die Detaildarstellung des an der Dieselramme angeordneten Kraftstofftanks
a) in der Seitenansicht;
b) in Querschnittsdarstellung;
Figur 3
die Darstellung des Kraftstofftanks aus Figur 2 in einer um 90 Grad verdrehten Position
  1. a) in der Seitenansicht;
  2. b) in Querschnittsdarstellung.
Other developments and refinements of the invention are specified in the remaining subclaims. An embodiment of the invention is illustrated in the drawings and described in detail below. Show it:
FIG. 1
the schematic representation of a diesel rammer;
FIG. 2
the detailed representation of the arranged on the diesel ram fuel tank
a) in side view;
b) in cross-sectional view;
FIG. 3
the representation of the fuel tank FIG. 2 in a 90 degree twisted position
  1. a) in side view;
  2. b) in cross-section.

Die als Ausführungsbeispiel gewählte Dieselramme umfasst einen beidseitig offenen Zylinder 1, der regelmäßig eine Länge von 3 bis 8 Metern und einen Durchmesser von 0,2 bis 1,5 Meter aufweisen kann. In dem Zylinder 1 ist ein Kolben 2 verschiebbar angeordnet. Ein hierzu koaxiales Schlagstück 3 greift verschiebbar in das offene untere Ende des Zylinders 1 ein. An dem unteren Ende des Zylinders 1 ist eine ringförmige Lagereinheit 9 befestigt, in der ein mittlerer Schaftabschnitt 31 des Schlagstücks 3 dicht und verschiebbar geführt ist, der einen gegenüber dem Innendurchmesser des Zylinders 1 verminderten Außendurchmesser aufweist. Die Dieselramme ist über an den Zylinder 1 angeordnete Führungsbacken 13 entlang eines Mäklers 8 vertikal verschiebbar gelagert.The diesel ram selected as an exemplary embodiment comprises a cylinder 1 which is open on both sides and which can regularly have a length of 3 to 8 meters and a diameter of 0.2 to 1.5 meters. In the cylinder 1, a piston 2 is slidably disposed. A coaxial to this impact piece 3 engages slidably in the open lower end of the cylinder 1 a. At the lower end of the cylinder 1, an annular bearing unit 9 is fixed, in which a middle shaft portion 31 of the hammering piece 3 is guided tightly and displaceably, which has a relation to the inner diameter of the cylinder 1 reduced outer diameter. The diesel ram is mounted vertically displaceable over arranged on the cylinder 1 guide jaws 13 along a leader 8.

An dem unteren Ende des Schaftabschnitts 31 ist eine unterhalb des Zylinders 1 liegende Schlagplatte 32 angeformt, deren nach außen gerichtete untere konvexe Begrenzungsfläche 33 im Betrieb mit dem oberen Ende eines einzutreibenden Rammgutes zusammenwirkt.At the lower end of the shank portion 31 there is formed a striking plate 32 located below the cylinder 1, the outwardly directed lower convex boundary surface 33 cooperating in operation with the upper end of a driven-in pile material to be driven in.

An dem oberen Ende des Schaftabschnitts 31 des Schlagstücks 3 ist ein Kolbenabschnitt 34 mit mehreren umlaufenden, axial beabstandeten Dichtringen angeformt, die auf der Innenmantelfläche 11 des Zylinders 1 laufen. Durch die Oberseite des Kolbenabschnitt 34 des Schlagstücks 3 ist zusammen mit der Unterseite des Kolbens 2 sowie der Innenmantelfläche 11 des Zylinders 1 ein Brennraum 12 begrenzt. Die dem Brennraum 12 des Zylinders 1 zugewandte Stirnfläche des Schlagstücks 3 ist plan mit einer flachen Brennstoffmulde geschliffen.At the upper end of the shaft portion 31 of the striking piece 3, a piston portion 34 is formed with a plurality of circumferential, axially spaced sealing rings which run on the inner circumferential surface 11 of the cylinder 1. Through the top of the piston portion 34 of the hammer 3, a combustion chamber 12 is limited together with the underside of the piston 2 and the inner circumferential surface 11 of the cylinder 1. The combustion chamber 12 of the cylinder 1 facing end face of the hammer 3 is ground flat with a shallow fuel well.

Zwischen der Schlagplatte 32 des Schlagstücks 3 und der Lagereinheit 9 des Zylinders 1 ist ein Dämpfungsring 91 angeordnet. Ein weiterer Dämpfungsring 92 ist benachbart zur Lagereinheit 9 zwischen der Oberseite der Lagereinheit 9 und der Unterseite des Kolbenabschnitts 34 des Schlagstücks 3 angeordnet.Between the impact plate 32 of the hammer 3 and the bearing unit 9 of the cylinder 1, a damping ring 91 is arranged. A further damping ring 92 is arranged adjacent to the bearing unit 9 between the upper side of the bearing unit 9 and the underside of the piston portion 34 of the hammer 3.

Oberhalb des Schlagstücks 3 läuft im Inneren des Zylinders 1 ein mit umlaufenden, axial zueinander beabstandeten Dichtringen 93 versehenes, unteres Arbeitsende 23 des Kolbens 2. Die untere freie, plan geschliffene Stirnfläche 21 des Kolbens 2 ist durch eine radial außenliegend umlaufende Stufe abgesetzt.Above the hammer 3 runs in the interior of the cylinder 1 with a circumferential, axially spaced sealing rings 93 versehenes, lower working end 23 of the piston 2. The lower free, ground flat end face 21 of the piston 2 is discontinued by a radially outboard circumferential stage.

An dem unteren Arbeitsende 23 des Kolbens 2 ist ein Massenabschnitt 2 angeformt, der sich in dem oberen Abschnitt des Zylinders 1 hinein erstreckt. An der Umfangswand des Zylinders 1 ist eine Einspritzvorrichtung 4 angeordnet, die eine Kraftstoffpumpe 41 umfasst, die über eine Leitung 43 mit der Einspritzdüse 42 verbunden ist. Der Einlass der Kraftstoffpumpe 41 wird über einen Kraftstofftank 5 mit Dieselöl gespeist.At the lower working end 23 of the piston 2, a mass portion 2 is formed, which extends in the upper portion of the cylinder 1 inside. On the peripheral wall of the cylinder 1, an injection device 4 is arranged, which comprises a fuel pump 41 which is connected via a line 43 to the injection nozzle 42. The inlet of the fuel pump 41 is fed via a fuel tank 5 with diesel oil.

Der Kraftstofftank 5 ist im Ausführungsbeispiel als Blechbehälter ausgebildet, an dessen gegenüberliegenden Ober- und Unterseite jeweils ein Flansch 51 angeformt ist. Der Kraftstofftank 5 ist zwischen zwei parallel zueinander an dem Zylinder 1 angeordneten, umlaufenden Stegen 14 angeordnet, welche jeweils über Winkelstücke 15 an dem Zylinder 1 befestigt sind. Dabei ist der Tank 5 mit den Stegen 14 des Zylinders 1 über Schwingungselemente 6 verbunden, wie in Figur 2 dargestellt. Durch die vertikale Anordnung der Schwingungselemente 6 zwischen den jeweils horizontal verlaufenden Stegen 14 und den parallel hierzu angeordneten Flanschen 51 des Kraftstofftanks 5 sind die Schwingungselemente 6 in der Hauptschwingrichtung des Kolbens 2 positioniert, wodurch eine besonders effektive Schwingungsdämpfung erzielt ist. Im Ausführungsbeispiel sind die Schwingungselemente 6 im Wesentlichen aus Gummi hergestellt.The fuel tank 5 is formed in the embodiment as a sheet metal container, on whose opposite upper and lower sides in each case a flange 51 is integrally formed. The fuel tank 5 is arranged between two mutually parallel arranged on the cylinder 1, circumferential webs 14, which are each attached via elbows 15 to the cylinder 1. In this case, the tank 5 is connected to the webs 14 of the cylinder 1 via vibration elements 6, as in FIG. 2 shown. Due to the vertical arrangement of the vibration elements 6 between the respective horizontally extending webs 14 and the flanges 51 of the fuel tank 5 arranged parallel thereto, the vibration elements 6 are positioned in the main vibration direction of the piston 2, whereby a particularly effective vibration damping is achieved. In the exemplary embodiment, the vibration elements 6 are essentially made of rubber.

Die über die Leitung 43 mit dem Kraftstofftank 5 verbundene Kraftstoffpumpe 41 weist einen ins Innere des Zylinders 1 ragenden, vorgespannten Pumpenhebel 44 auf, über den sie bei Passieren des fallenden Kolbens 2 angetrieben wird. Die Einspritzdüse 42 ist derart ausgebildet und ausgerichtet, dass der abgegebene Kraftstoff in einem im Wesentlichen zusammenhängenden Strahl etwa mittig auf die Stirnfläche des Schlagstücks 3 gespritzt wird.The fuel pump 41, which is connected to the fuel tank 5 via the line 43, has a prestressed pump lever 44 projecting into the interior of the cylinder 1, via which it is driven when the falling piston 2 passes. The injection nozzle 42 is designed and aligned such that the discharged fuel is injected in a substantially continuous jet approximately centrally on the end face of the hammer 3.

Weiterhin ist an dem Zylinder 1 eine Schmierstoffpumpe 7 angeordnet, die mit in Umfangsrichtung des Zylinders 1 verteilten Schmierstoffdüsen verbunden ist. Durch die Schmierstoffdüsen wird Schmierstoff zwischen den Kolben 2 und die Innenmantelfläche 11 des Zylinders 1 gegeben.Furthermore, a lubricant pump 7 is arranged on the cylinder 1, which is connected to distributed in the circumferential direction of the cylinder 1 lubricant nozzles. By the lubricant nozzles lubricant between the piston 2 and the inner circumferential surface 11 of the cylinder 1 is given.

Die zuvor beschriebene Dieselramme arbeitet folgendermaßen: Im Ausgangszustand ist der Kolben 2 über die - nicht dargestellte - Ausklinkvorrichtung in eine obere Stellung angehoben. Nach Ausklinken fällt er von dort unter Einwirkung der Schwerkraft nach unten, verschließt die Arbeitsstutzen 16 und betätigt mit seiner Stirnfläche 21 den Pumpenhebel 44 der Einspritzvorrichtung 4, wodurch über die Einspritzdüse 42 Kraftstoff auf die Brennstoffmulde des Schlagstücks 3 gespritzt wird. Hier bildet sich durch Schlagzersteubung ein zündfähiges Gemisch aus Kraftstofftröpfchen und Luft.The diesel ram described above operates as follows: In the initial state of the piston 2 is raised via the - not shown - release device in an upper position. After notching it falls from there under the action of gravity down, closes the working nozzle 16 and actuates with its end face 21 the pump lever 44 of the injector 4, which is sprayed through the injector 42 fuel to the fuel bowl of the hammer 3. Here is formed by Schlagzersteubung an ignitable mixture of fuel droplets and air.

Mit dem Aufschlagen des Kolbens 2 auf das Schlagstück 3 wird auf das Schlagstück 3 und über dieses auf das Rammgut eine nach unten gerichtete Kraft ausgeübt, welche das Rammgut weiter in das Erdreich treibt. Bei der anschließend durch die explosionsartige Verbrennung des Kraftstoffs ausgelösten Aufwärtsbewegungen des Kolbens 2 gibt dieser die Arbeitsstutzen 16 frei, wodurch sich die Verbrennungsgase entspannen und über die Arbeitsstutzen 16 abströmen. Der Kolben 2 wird nun unter Ansaugen von frischer Luft durch die Arbeitsstutzen 16 weiter nach oben geschleudert, bis er seine obere Endstellung erreicht hat und sich der beschriebene Arbeitszyklus wiederholt. Die durch diese Arbeitszyklen initiierten insbesondere vertikalen Schwingungen werden über die Schwingungselemente 6 aufgenommen und in Wärmeenergie umgewandelt, wodurch der über die Schwingungselemente 6 mit dem Zylinder 1 verbundene Kraftstofftank 5 entkoppelt ist. Hierdurch ist die Resonanzwirkung des Kraftstofftanks 5 deutlich vermindert, wodurch die Lärmemissionen der Dieselramme reduziert sind.With the impact of the piston 2 on the hammer 3 a downward force is exerted on the hammer 3 and on this on the pile material, which drives the pile further into the ground. During the subsequent upward movements of the piston 2 triggered by the explosive combustion of the fuel, the latter releases the working nozzles 16, as a result of which the combustion gases relax and flow out via the working nozzles 16. The piston 2 is now thrown with the intake of fresh air through the working nozzle 16 further up until it has reached its upper end position and repeats the cycle described. The particular vertical vibrations initiated by these work cycles are absorbed by the vibration elements 6 and converted into heat energy, whereby the fuel tank 5 connected to the cylinder 1 via the vibration elements 6 is decoupled. As a result, the resonance effect of the fuel tank 5 is significantly reduced, whereby the noise emissions of the diesel ram are reduced.

Claims (3)

  1. Diesel pile driver having a cylinder (1), a piston (2) movably guided in the cylinder (1) and a striking piece (3) movably guided in the cylinder (1), which is arranged below the piston (2) in the operation position of the diesel pile driver, wherein a combustion chamber (12) is arranged, which is axially delimited by a front face of the striking piece (3) inside the cylinder (1) and a front face of the piston (2), and to which a fuel supply device (4) connected to a fuel tank (5) arranged outside at the cylinder (1) leads, by means of which during each work cycle a predetermined amount of fuel is introducible into the combustion chamber (12), characterised in that the fuel tank (5) is elastically mounted on the cylinder (1), wherein the elastic mounting is effected by vibration members (6), via which the fuel tank (5) is connected to the cylinder (1), wherein outside at the cylinder (1) two webs (14) are arranged parallel to each other, to which the fuel tank (5) is attached via vibration members (6).
  2. Diesel pile driver according to claim 1, characterised in that the vibration members (6) are vertically aligned in their effective direction.
  3. Diesel pile driver according to claim 2, characterised in that the vibration members (6) are designed as elastomeric members or rubber components.
EP13192602.4A 2013-11-12 2013-11-12 Diesel pile driver Not-in-force EP2871288B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13192602.4A EP2871288B1 (en) 2013-11-12 2013-11-12 Diesel pile driver
US14/533,162 US20150129270A1 (en) 2013-11-12 2014-11-05 Diesel hammer pile driver
CN201410633641.0A CN104631456A (en) 2013-11-12 2014-11-12 Diesel pile driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13192602.4A EP2871288B1 (en) 2013-11-12 2013-11-12 Diesel pile driver

Publications (2)

Publication Number Publication Date
EP2871288A1 EP2871288A1 (en) 2015-05-13
EP2871288B1 true EP2871288B1 (en) 2016-03-16

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EP13192602.4A Not-in-force EP2871288B1 (en) 2013-11-12 2013-11-12 Diesel pile driver

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EP (1) EP2871288B1 (en)
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US20150129270A1 (en) 2015-05-14
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