EP3067470B1 - Vibrateur comme accessoire d'engin de chantier - Google Patents

Vibrateur comme accessoire d'engin de chantier Download PDF

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Publication number
EP3067470B1
EP3067470B1 EP16159103.7A EP16159103A EP3067470B1 EP 3067470 B1 EP3067470 B1 EP 3067470B1 EP 16159103 A EP16159103 A EP 16159103A EP 3067470 B1 EP3067470 B1 EP 3067470B1
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EP
European Patent Office
Prior art keywords
upright
exciter cell
vibrator
exciter
cell
Prior art date
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Active
Application number
EP16159103.7A
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German (de)
English (en)
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EP3067470A1 (fr
Inventor
Steffen Schweizer
Oliver Holland-Cunz
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.)
Liebherr Werk Nenzing GmbH
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Liebherr Werk Nenzing GmbH
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Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses
    • 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
    • E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
    • E02D7/16—Scaffolds or supports for drivers

Definitions

  • the invention relates to a vibrator, in particular an upright vibrator, as an attachment for a construction machine consisting of a pull yoke for guided mounting of the vibrator on a construction machine and an exciter cell mounted within the pull yoke to generate the vibrations necessary for the pile driving work.
  • Such vibrators can be used in construction, especially in special civil engineering, for example for pile-driving equipment, in order to generate directional vibrations by means of which sheet piling is to be driven into the ground, for example, or vibrating plug columns to be introduced into the ground.
  • the exciter cell for generating the necessary vibrations is attached to or in a pulling yoke that is connected to a suitable special civil engineering machine such as pile drivers or rope excavators.
  • pile drivers or rope excavators such as pile drivers or rope excavators.
  • the vibrators are height-adjustable on a corresponding rail system of the machine.
  • EP 2 444 553 A1 discloses a device for driving and pulling sheet piles and the like. into or out of the ground, comprising a leader on which an exciter cell is guided, which is coupled to a feed system via which it is vertical is linearly movable.
  • the exciter cell is rigidly connected to at least one guide element, the at least one guide element being guided exclusively on the leader and elastically connected to the feed system.
  • a vibration hammer for trench shoring with a yoke forming a static load, a vibrator, vibration dampers attached to the yoke in pairs, and brackets firmly connected to the vibrator, arranged between the vibration dampers of each pair, the brackets being designed as sliding bodies that run in guides in the working direction are kept movable, which in turn are firmly connected to the vibration damper teaches DE 85 07 086 U1 .
  • Method and apparatus for driving and pulling piles which includes a vibration / tensile load damper assembly mounted between a housing and the vibration unit, which includes shear vibration dampers which are connected between the housing and the vibration unit and which work in combination with at least one compression vibration damper which is so positioned is that it is compressed between first and second compression plates when the tensile load has reached a predetermined level in US 7 080 958 B1 disclosed.
  • US 2011/008111 A1 discloses, including a ram configured to connect to an articulated boom of an excavator or other unit of positioning machines for inserting a portion of a curved sheet pile under a conduit.
  • the ram has a head portion and a body portion.
  • the head portion of the pile driver is connected to the excavator and the body portion of the pile driver is movable relative to both the head portion of the pile driver and the excavator so that the pile driver can properly orient a portion of the curved sheet pile for introduction into subterranean material under an underground conduit.
  • One possible design of the generic vibrator is an upright vibrator or upright vibrator, which is characterized by a comparatively compact design.
  • the edgewise vibrator is used in areas that are difficult to access.
  • the exciter cell is usually mounted in a pull yoke, decoupled from vibrations. Vibration decoupling is achieved through the use of suitable bearing components, which are attached as bearings or suspension points between the draw yoke and the exciter cell and are intended to absorb a large part of the vibrations.
  • the bearing components are usually arranged distributed between the moving parts, but a particular system of the arrangement has not yet been investigated.
  • the search is therefore for an optimized storage of the exciter cell within the draw yoke that knows how to overcome the aforementioned disadvantages.
  • the symmetrical arrangement ensures that the exciter cell is evenly positioned within the draw yoke so that undesirable movements are largely avoided.
  • the number of bearing components for the front and rear of the vibrator can preferably be selected to be the same. Furthermore, the bearing components can be fastened at corresponding locations on the front and rear.
  • the arrangement is, for example, symmetrical to the ram axis or central axis of the exciter cell or of the vibrating part.
  • the vibrator is ideally suited for leader-guided operation on a construction machine, in which case the pulling yoke has one or more guide elements to guide the vibrator in a height-adjustable manner on the leader.
  • the vibrator is designed as an upright vibrator and can be designed for high or normal frequency operation.
  • the upper and lower areas refer to an area along the pile driving axis.
  • At least two, preferably at least four, elastic bearing components are provided on each of the lower and upper areas of the exciter cell, and are mounted, for example, distributed over the circumference of the exciter cell.
  • two elastic bearing components it is advisable for two elastic bearing components to be provided on the upper and lower area of the same on the front and on the rear.
  • the proposed embodiment does not rule out the fact that further bearing components are provided, for example in the central area, but these are not absolutely necessary for sufficient suppression of the relative movements transverse to the ram axis.
  • the elastic bearing components can for example consist of an elastomer or at least partially comprise this.
  • other elastic components are also suitable which allow sufficient damping of the relative movements and are nevertheless characterized by a high level of durability.
  • one or more sliding guides are provided, which are preferably arranged between the draw yoke and the exciter cell.
  • a rigid attachment of the one or more sliding guides to the exciter cell as well as to the pull yoke is conceivable.
  • the sliding guide is assembled by screwing, gluing, riveting, etc.
  • all sliding guides are either firmly connected to the exciter cell or, alternatively, firmly connected to the draw yoke; in addition, it is conceivable to connect part of the sliding guides to the exciter cell while the remaining Part is firmly mounted on the draw yoke.
  • the one or more sliding guides are attached to the side surfaces between the draw yoke and the exciter cell, for example one sliding guide per side surface is seated on the upper and lower area of the side surface when viewed in the ramming direction. It is particularly preferred if at least one, preferably all of the sliding guides lie on the center plane of the vibrating component of the exciter cell. As a result, the sliding guide is placed on the ramming plane of the moving mass and all sliding guides are subjected to an even load.
  • the wear phenomena that occur are to be reduced to the one or more sliding guides.
  • This is achieved through a tribologically optimized geometry of the sliding guides used or a tribologically optimized geometry of the contact surface between the sliding partners of the sliding guide.
  • a convex contour of the contact surface of at least one sliding partner of the sliding guide By means of a convex contour of the contact surface of at least one sliding partner of the sliding guide, the contact and the associated frictional force can be noticeably reduced. This not only has a positive effect on the transfer of energy, but also reduces contact-related wear and tear on the sliding guides.
  • due to the tribologically optimized geometries of the sliding surfaces prevailing contact forces can be evenly distributed to all bearings or guides used.
  • the sliding guides used are at least partially made of technical ceramics.
  • Technical ceramic is a very hard, wear-resistant material, which effectively reduces the operational wear of the sliding guides and increases the durability of the vibrator.
  • the sliding part of the vibrator for example the draw yoke, is usually made of steel, so that a very hard and wear-resistant sliding partner slides on the steel counter body with little wear.
  • the invention also includes a construction machine with at least one vibrator according to the present invention or an advantageous embodiment of the invention. It is conceivable that the construction machine has at least one leader in order to receive the vibrator in a displaceable manner in the driving direction. A rope excavator with a corresponding leader is conceivable as a construction machine.
  • Figure 1 shows a side view of the upright vibrator according to the invention, as it is used in particular in civil engineering for the introduction of vibrating plug columns or sheet pile walls.
  • the vibrator can be suitable for normal-frequency or high-frequency vibration for vibrating (shaking) the steel profiles.
  • the illustration shows the draw yoke 10, on the rear side of which a guide rail 11 is formed. With the aid of the guide rail 11, the draw yoke 10 can be vertically displaced on a leader of a suitable construction machine as an attachment tool attach. At the lower end of the draw yoke 10, the exciter cell 20 protrudes. The vibrator clamping pliers, usually attached to the protruding underside of the exciter cell 20, for the clamping reception of a steel profile to be vibrated, are not shown. On the upper side 12 of the draw yoke 10 or the exciter cell 20 there are connection points in order to provide a hydraulic energy supply for the exciter cell 20 by the carrier device.
  • one or more exciter cell shafts In the interior of the box-shaped exciter cell 20, one or more exciter cell shafts, preferably aligned parallel to one another, are mounted, each of which is rotatably mounted and includes eccentrically attached unbalanced masses that generate the desired vibratory movement through the rotation of the exciter shafts.
  • An integrated drive preferably of a hydraulic type, is provided for the rotational movement.
  • it is particularly desirable to have a vibration in the direction of the ram axis, which is shown, for example, in the sectional views of Figures 3.4 is identified by the reference character A.
  • the ram axis A extends parallel to the leader.
  • the undesired transverse accelerations and transverse forces transverse to the ram axis are intended to be reduced by mounting the exciter cell 20 within the draw yoke 10 via a symmetrical arrangement of elastomer bearings 30.
  • These bearings 30 serve as bearings and attachment points of the exciter cell 20 within the pull yoke 10.
  • these cuboid elastomer bearings 30 are arranged symmetrically to the ram axis A, whereby the undesired transverse forces and transverse movements can be optimally damped. This results in an almost optimal vibration decoupling of the exciter cell 20 within the pull yoke 10.
  • the symmetrical mounting of the exciter cell 20 here explicitly means the double-symmetrical suspension of the exciter cell 20 in the draw yoke 10. This means that the exciter cell 20 is mounted symmetrically with respect to two cutting planes along the ram axis so as to dampen vibrations. Here is one of these cutting planes the ram plane and the other cutting plane is a plane rotated by 90 ° to the ram plane around the ram axis.
  • the storage concept provides for the exciter cell 20 to be supported at the top and bottom of the draw yoke 10.
  • This special arrangement of the bearings serves to reduce the vibrations that do not run along the pile driving axis. This is necessary in order to achieve the most uniaxial movement of the exciter cell 20 along the ram axis in the draw yoke 10.
  • FIG. 3 shows in detail that four elastomer mountings 30 are provided in both the upper and lower areas of the exciter cell 20. Two of these are provided on the front 13 and two opposite on the rear 14 of the vibrator. This is also clear from the sectional view of Figure 4 .
  • the exciter cell 20 is mounted uniformly and symmetrically with respect to the draw yoke 10 both in its upper and in its lower area.
  • sliding guides 40 are available for the vibratory movement of the exciter cell 20 in the direction of the ram axis A, two sliding guides 40 being firmly connected to the exciter cell 20 on each side surface of the exciter cell 20.
  • the sliding guides 40 are on the central plane or ramming plane. Since the draw yoke 10 is usually a steel structure and the sliding guides slide along this steel structure, a very hard and wear-resistant material must be selected for the sliding guides 40. For this reason, the sliding guides 40 are made of technical ceramics.
  • the sliding guides 40 are provided with a tribologically optimized geometry in order to reduce the contact surface between the sliding guide 40 and the drawing yoke 10 sliding along to a minimum.
  • the surface 41 represents the sliding partner of the guide, which slides along the draw yoke 10.
  • Figure 5a shows a plan view of the on the exciter cell 20 mounted sliding guide 40
  • Figure 5b shows a sectional view through the sliding guide along the sectional axis BB.
  • the fixed assembly on the exciter cell 20 is carried out by means of a screw connection.
  • the core idea of the invention lies in the reduction of the relative movements of the exciter cell 20 in the transverse direction to the ramming axis A by means of symmetrical attachment of the elastomer bearings 30. This allows transverse accelerations and transverse forces to be reduced, which reduces the load on the sliding guide 40 and the energy saved as a result for the provides regular, vertical movement.
  • an optimized geometric shape 41 of the sliding guide 40 reduces the contact area between the bodies 10, 20 that are moved relative to one another, which lowers the friction that occurs and the energy dissipated as a result.
  • the sliding guides 40 are placed on the ramming plane.
  • the use of technical ceramics for a sliding partner of the sliding guide 40 is intended to reduce wear. This allows the service life of the sliding guides 40 to be increased significantly.

Claims (9)

  1. Vibrateur vertical qui peut être fixé de manière déplaçable verticalement à une jumelle d'une machine de construction, comportant un étrier de traction (10) pour monter le vibrateur vertical sur la jumelle de la machine de construction et une cellule d'excitation (20) montée sur l'étrier de traction (10) pour générer les vibrations,
    dans lequel un agencement de composants de palier élastiques (30) symétriques par rapport à l'axe de l'enfoncement de pieux (A) de la cellule d'excitation (20) est prévu pour le montage à découplage vibratoire de la cellule d'excitation (20) sur l'étrier de traction (10) afin de réduire les mouvements relatifs de la cellule d'excitation (20) transversalement à l'axe de l'enfoncement de pieux (A), la cellule d'excitation (20) étant montée à ses extrémités inférieure et supérieure, vue dans la direction de l'enfoncement de pieux (A), par au moins un composant de palier (30) par rapport à l'étrier de traction (10),
    caractérisé
    en ce qu'au moins une glissière (40) est prévue pour le guidage coulissant de la cellule d'excitation (20) dans la direction de vibration ou de l'enfoncement de pieux (A).
  2. Vibrateur vertical selon la revendication 1, caractérisé en ce que la cellule d'excitation (20) possède une section transversale sensiblement rectangulaire et que deux composants de palier élastiques (30) sont chacun prévus sur les côtés avant et arrière de la région supérieure et inférieure de la cellule d'excitation (20).
  3. Vibrateur vertical selon l'une quelconque des revendications précédentes, caractérisé en ce que les composants de palier élastiques (30) sont constitués par ou comportent un élastomère.
  4. Vibrateur vertical selon l'une quelconque des revendications précédentes, caractérisé en ce que deux glissières (40) sont montées sur chaque surface latérale du vibrateur vertical, en particulier une glissière (40) chacune sur la région supérieure et inférieure entre la cellule d'excitation (20) et l'étrier de traction (10).
  5. Vibrateur vertical selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une ou plusieurs, de préférence toutes les glissières (40) se trouvent sur le plan central de la masse en mouvement de la cellule d'excitation (20) ou sont agencées symétriquement par rapport au plan central.
  6. Vibrateur vertical selon l'une quelconque des revendications précédentes, caractérisé en ce que les une ou plusieurs glissières (40) possèdent une géométrie tribologiquement optimisée.
  7. Vibrateur vertical selon la revendication 6, caractérisé en ce que les une ou plusieurs glissières (40) comportent au moins une surface de contact convexe qui est en contact avec la partie guidée, c'est-à-dire avec l'étrier de traction (10) et/ou la cellule d'excitation (20).
  8. Vibrateur vertical selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un partenaire de glissement de l'une ou plusieurs glissières (40) est constitué au moins partiellement de céramique technique ou en comprend.
  9. Machine de construction comportant un vibrateur vertical selon l'une quelconque des revendications précédentes.
EP16159103.7A 2015-03-10 2016-03-08 Vibrateur comme accessoire d'engin de chantier Active EP3067470B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015001862.9U DE202015001862U1 (de) 2015-03-10 2015-03-10 Rüttler als Anbaugerät für eine Baumaschine

Publications (2)

Publication Number Publication Date
EP3067470A1 EP3067470A1 (fr) 2016-09-14
EP3067470B1 true EP3067470B1 (fr) 2020-12-09

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DE (1) DE202015001862U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113323039A (zh) * 2021-06-15 2021-08-31 温州超泽天硕智能科技有限公司 一种自平衡桩基检测装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8507086U1 (de) * 1985-03-12 1985-04-25 Krings International GmbH & Co KG, 5138 Heinsberg Vibrationsramme für den Grabenverbau
US7080958B1 (en) * 2005-04-27 2006-07-25 International Construction Equipment, Inc. Vibratory pile driver/extractor with two-stage vibration/tension load suppressor
US20110008111A1 (en) * 2009-07-10 2011-01-13 Hercules Machinery Corporation Apparatus for inserting sheet pile having an independently adjustable insertion axis and method for using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527667A1 (fr) * 1982-05-27 1983-12-02 Procedes Tech Const Dispositif amovible de traction supplementaire pour appareil de foncage et/ou arrachage par vibration
US8342778B2 (en) * 2009-04-16 2013-01-01 Hercules Machinery Corporation Method and apparatus for facilitating the subterranean support of underground conduits having a fixed insertion axis
EP2444553B1 (fr) * 2010-10-20 2012-12-05 ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH Dispositif de battage et de traction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8507086U1 (de) * 1985-03-12 1985-04-25 Krings International GmbH & Co KG, 5138 Heinsberg Vibrationsramme für den Grabenverbau
US7080958B1 (en) * 2005-04-27 2006-07-25 International Construction Equipment, Inc. Vibratory pile driver/extractor with two-stage vibration/tension load suppressor
US20110008111A1 (en) * 2009-07-10 2011-01-13 Hercules Machinery Corporation Apparatus for inserting sheet pile having an independently adjustable insertion axis and method for using the same

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EP3067470A1 (fr) 2016-09-14
DE202015001862U1 (de) 2016-06-13

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