EP2837740B1 - Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine - Google Patents

Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine Download PDF

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Publication number
EP2837740B1
EP2837740B1 EP14180561.4A EP14180561A EP2837740B1 EP 2837740 B1 EP2837740 B1 EP 2837740B1 EP 14180561 A EP14180561 A EP 14180561A EP 2837740 B1 EP2837740 B1 EP 2837740B1
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EP
European Patent Office
Prior art keywords
milling
milling drum
coolant
construction machine
axis
Prior art date
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Application number
EP14180561.4A
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German (de)
English (en)
French (fr)
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EP2837740A1 (de
Inventor
Christian Berning
Dr. Cyrus Barimani
Dr. Günter Hähn
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.)
Wirtgen GmbH
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Wirtgen GmbH
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus

Definitions

  • the invention relates to a self-propelled construction machine for machining roadways or ground surfaces with a machine frame supported by a chassis and arranged on the machine frame and rotatable about a transverse to the direction of the construction machine axis of rotation milling drum.
  • the known milling machines For cooling the milling tools, the known milling machines have a nozzle arrangement which comprises a plurality of nozzles arranged parallel to the axis of rotation of the milling drum.
  • the nozzles each generate a flat jet which is aligned orthogonally or tangentially to the lateral surface of the milling drum. Since the individual flat beams partially overlap, a common spray jet extending over the working width of the milling drum and directed onto the lateral surface of the roller results.
  • the DE 102 13 017 A1 describes a milling machine with a cooling device having a plurality of nozzles which are arranged along an axis parallel to the axis of rotation of the milling drum axis. To reduce the consumption of coolant is proposed to control the amount of coolant supplied in response to a characteristic that is characteristic of the current performance of the milling drum.
  • the invention is based on the object to provide a construction machine with a reduced consumption of coolant for cooling the milling tools of the milling drum, so that the dimensions of the coolant reservoir can be reduced and / or the availability of the construction machine can be increased.
  • the construction machine has a cooling device for spraying the milling tools of the milling drum with a coolant from a coolant reservoir.
  • the cooling device is designed such that at least one coolant jet extending essentially parallel to the axis of rotation of the milling drum is produced.
  • a single coolant jet is sufficient, which runs transversely to the working direction of the milling drum.
  • the milling drum milling tools pass successively through the coolant jet. Due to the relatively dense arrangement of the milling tools in the circumferential direction of the milling drum, the time intervals in which no milling tool is hit by a coolant jet, relatively short. As a result, the coolant consumption can be reduced.
  • the coolant jet may be designed differently, as long as the jet extends substantially parallel to the axis of rotation of the milling drum.
  • the coolant jet is a full jet or spot beam having a high specific radiant force.
  • the coolant jet can also be a flat jet with a cone that has a very small angle.
  • the preferred embodiment provides that the solid jet runs along a circular cylindrical lateral surface, on which the milling tools of the milling drum are arranged, so that the full jet impinges directly on the milling tools.
  • the solid jet runs along the circular cylindrical surface on which the chisel tips are arranged.
  • the solid jet preferably runs along a circular cylindrical lateral surface, the diameter of which is smaller than the cutting circle of the milling drum, so that it is ensured even in the case of the abrasive bit tips that the full jet always strikes the bit tips.
  • An embodiment of the cooling device has at least one nozzle which is arranged on one of the two longitudinal sides of the machine frame next to the milling drum such that a coolant jet extending parallel to the axis of rotation of the milling drum is produced.
  • This embodiment is intended for milling drums in which only one milling tool, which is laterally struck by the coolant jet, is arranged on the circumference of the roll along an axis which runs parallel to the rotation axis of the milling roll.
  • An alternative embodiment of the cooling device provides at least one nozzle on both longitudinal sides of the machine frame.
  • This embodiment is intended for milling drums in which two milling tools are arranged on a parallel to the axis of rotation of the milling drum axis.
  • the one-sided milling tool is sprayed with the one nozzle from one side and the milling tool located at the other side with the other nozzle from the other side.
  • the replaceable milling tools of the known milling drums are located in tool holders, which are also exposed to wear. With increasing wear of the tool holder, the distance between the tip of the cutting tool and the tool decreases Rotary axis of the milling drum.
  • a further preferred embodiment of the invention therefore provides that the distance of the coolant jet to the rotational axis of the milling drum can be changed.
  • the cooling device has a nozzle which can be fixed at different radial distances from the axis of rotation of the milling drum, so that the coolant jet running parallel to the axis of rotation of the milling drum can be aligned exactly with the milling tool.
  • the cooling device has a plurality of nozzles arranged at different radial distances from the axis of rotation of the milling drum, a valve arrangement being provided for switching on and off the individual nozzles. Consequently, that nozzle can be switched on, the coolant jet impinges on the milling tool, while the other nozzles can be turned off. In addition, several nozzles can be switched on simultaneously. The connection and disconnection of the respective nozzles can be done manually or automatically.
  • the cooling device preferably has a pressure line connecting the coolant reservoir to the at least one nozzle, wherein a pressure pump is provided in the pressure line.
  • the pressure pump is preferably a high-pressure pump which generates a pressure sufficient to produce a full jet.
  • the coolant reservoir is preferably a coolant tank arranged on the machine frame. Instead of a large tank, but also several small tanks can be provided.
  • the milling drum is preferably arranged in a roller housing, wherein the nozzles of the coolant device are preferably arranged on one or both longitudinal sides of the machine frame on the roller housing.
  • the nozzles are arranged outside the roll housing. But they can also be arranged inside the housing.
  • the inventive method for cooling the milling drum is characterized in that at least one substantially parallel to the axis of rotation of the milling drum extending coolant jet is generated, which is directed laterally on the milling tools.
  • a coolant jet can be directed onto the milling tools from only one longitudinal side of the construction machine or in each case one coolant jet from both longitudinal sides.
  • the distance of the coolant jet to the axis of rotation of the milling drum is preferably changed depending on the wear of the milling tools.
  • Fig. 1 shows the essential components of a road milling machine as an example of a construction machine for processing lanes or ground surfaces, which has a machine frame 1 and a chassis 2.
  • the construction machine can also be a Recycler or surface miner.
  • the chassis 2 of the milling machine comprises four track drives 2A. 2B, which are arranged at the front and rear sides of the machine frame 1, which has a front side 1A in the traveling direction 10, a rear side 1B and two longitudinal sides 1C, 1D.
  • the road milling machine has a milling device 4, which is arranged below the machine frame 1.
  • the milled milled material is discharged with a arranged on the front of the machine frame conveyor 5.
  • the milling device 4 comprises a milling drum 6 and a milling drum drive 7.
  • the milling drum 6 is arranged in a milling drum housing 8, which encloses the milling drum.
  • the milling drum housing 8 is located below the machine frame 1 between the front and rear crawler tracks 2A, 2B.
  • Cooling device for cooling the tools of the milling drum 6 is an in Fig. 1 Cooling device, not shown, is provided which sprays coolant from a coolant reservoir 16 onto the tools of the milling drum.
  • the coolant reservoir 16 may be a coolant tank arranged in the working direction 10 in front of the milling device 4.
  • Fig. 2 shows a schematic representation of the Fräswalzengeophuse 8 together with a milling drum 6, which is interchangeable with another Fräswalzentyp.
  • the equipped with milling tools 11 milling drum 6 rotates about an axis of rotation 12 which extends transversely to the working or feed direction 10 of the milling machine, wherein the milling drum extends over the working width of the machine.
  • Fig. 3A shows the milling tools 11 of the milling drum 6 in an enlarged view.
  • the milling tools 11 which are inclined relative to the lateral surface 6A of the milling drum 6 are round shank bits 11 which have a cap-shaped chisel tip 11A made of particularly wear-resistant material, for example hard metal, or polycrystalline diamond (PCD).
  • the bit tip 11A is fixedly connected to a bit body 11B interchangeably inserted in a bit holder 11C.
  • the round shank bit 11 and in particular the bit tip 11 A is exposed to heavy wear. Therefore, the Round shank chisel 11 regularly replaced. Wear is also the bit holder 11C exposed.
  • the wear of the bit holders 11C causes the bit tip 11A to shift radially inwardly along the axis 11D of the bit. This reduces the distance a between chisel tip 11A and the axis of rotation 12 of the milling drum 6. However, this wear takes place over a much larger period of time, so that the chisel holder are not constantly replace.
  • the cooling device 21 has a nozzle 13 which is arranged on a longitudinal side 1C, 1D of the machine frame 1 next to the milling drum 6 on the milling drum housing 8.
  • the nozzle 13, which is attached to a part 1E of the machine frame 1 at the height of the milling tools 11 or may be attached directly to the milling drum housing, generates a parallel to the axis of rotation 12 of the milling drum 6 extending coolant jet 14 laterally on the bit tips 11A which comes through the coolant jet moving milling cutter 11 of the rotating milling drum 6.
  • the nozzle 13 can sit in a recess 8B of the side wall 8A of the milling drum housing 8.
  • Fig. 2 the processing of the milling drum 6 is shown with the milling chisels 11.
  • the cooling device 21 of Fig. 2 is intended for a Fräswalzentyp, in which only one milling bit 11 is arranged on a parallel to the axis of rotation 12 of the milling drum 6 extending axis 15. Consequently, the coolant jet can hit one after the other all the cutting tools that pass through the coolant jet immediately after one another in a short time sequence. The consumption of coolant is therefore relatively low.
  • a single coolant jet 14 is sufficient.
  • the coolant jet is preferably a full jet.
  • a plurality of coolant jets can be distributed at different diameters and / or circumferentially in order to improve the cooling.
  • a much higher number of nozzles is needed. For example, would be at radial Alignment of the beams in the embodiment of Fig. 2 for the cooling of all milling tools 11 radially directed rays 23 is required
  • the coolant is provided in a coolant tank 16. From the coolant tank 16, a coolant pipe 17 leads to the nozzle 13. The pressure required for the nozzle 13 is generated by a high pressure pump 18 provided between the coolant tank 16 and the nozzle 13.
  • the nozzle 13 is slidably disposed, wherein the nozzle in different positions P 1 , P 2 , P 3 can be determined.
  • Fig. 3B shows an embodiment with a detectable nozzle 13 in a simplified representation. The nozzle 13 is displaceable on an axis 13A inclined relative to the milling tools 11 in a slot 13B provided in a side wall 8A of the milling drum housing 8 or on a part of the machine frame 1.
  • Fig. 3B also shows a view on the outside of the side wall 8A of the roller housing 8.
  • the nozzle 13 is attached to a nozzle holder 13C, which by means of a locking screw 13D shown only schematically in a variety of positions, for example in the positions P 1 , P 2 , P 3 , can be fixed to the side wall 8A of the roller housing 8.
  • a locking screw 13D shown only schematically in a variety of positions, for example in the positions P 1 , P 2 , P 3 , can be fixed to the side wall 8A of the roller housing 8.
  • the slot 13B may also describe a curve. It is also possible that the nozzle 13 is displaceably guided on an axis orthogonal to the circumferential surface 6A of the milling drum 6.
  • An alternative embodiment provides, instead of a single slidably guided nozzle, a nozzle assembly 19 having a plurality of fixed nozzles 13 ', 13 ", 13"'.
  • Fig. 3C shows the nozzle assembly 19 with the nozzles 13 ', 13 ", 13'” and the chisels 11 in a simplified schematic representation.
  • the nozzles are like that arranged that the distance a 1 , a 2 , a 3 between the coolant jets 14 and the axis of rotation 12 corresponds to the wear pattern of the tool holder 11C.
  • a Ventilananordung 20 is shown only schematically, which can be controlled by a control unit.
  • Fig. 4 shows an alternative embodiment of the cooling device 21 which is intended for another Fräswalzentyp.
  • This embodiment which is also for the Fräswalzentyp of Fig. 2 is suitable, differs in that both on the right in the working direction 10 longitudinal side 1D and on the left in the working direction 10 longitudinal side 1C of the machine frame 1, a nozzle 13L, 13R is arranged on the Fräswalzengephaseuse 8 next to the milling drum 6.
  • the corresponding parts are again provided with the same reference numerals.
  • the pressure medium line 17 leads in this embodiment to two nozzles 13L, 13R, which preferably each generate a full jet, which can extend on a common axis parallel to the axis of rotation 12 of the milling drum 6 axis.
  • the milling drum 6 of Fig. 4 has twice the working width as the milling drum of Fig. 2 ,
  • the Fräsm facedel 11 are in the Fräswalzentyp of Fig. 4 arranged circumferentially such that in each case two milling bits 11 are located on an axis 15 which is parallel to the axis of rotation 12 of the milling drum 6.
  • Fig. 4 are two milling bits denoted by 11L and 11R, which lie on a common axis 15.
  • the coolant jet 14 of the right nozzle 13R impinges on the right milling tool 11R and the coolant nozzle of the left nozzle 13L impinges on the left tool 11L. Consequently, two milling bits are always cooled simultaneously.
  • the two nozzles 13L, 13R of the cooling device 21 of Fig. 4 can be detected again nozzles ( Fig. 3B ) or nozzles of a nozzle arrangement 19 with a plurality of fixed nozzles 13 ', 13 ", 13"' ( Fig. 3C ).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Repair (AREA)
EP14180561.4A 2013-08-12 2014-08-11 Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine Active EP2837740B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310013304 DE102013013304A1 (de) 2013-08-12 2013-08-12 Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine

Publications (2)

Publication Number Publication Date
EP2837740A1 EP2837740A1 (de) 2015-02-18
EP2837740B1 true EP2837740B1 (de) 2015-12-02

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EP14180561.4A Active EP2837740B1 (de) 2013-08-12 2014-08-11 Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine

Country Status (4)

Country Link
US (1) US9217228B2 (zh)
EP (1) EP2837740B1 (zh)
CN (2) CN204343148U (zh)
DE (1) DE102013013304A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013013304A1 (de) * 2013-08-12 2015-02-12 Wirtgen Gmbh Selbstfahrende Baumaschine zum Bearbeiten von Fahrbahnen oder Bodenoberflächen und Verfahren zum Kühlen der Fräswerkzeuge einer Fräswalze einer selbstfahrenden Baumaschine
DE102016001720B4 (de) * 2016-02-16 2020-09-17 Wirtgen Gmbh Selbstfahrende Baumaschine und Verfahren zum Betreiben einer selbstfahrenden Baumaschine
IT201800007858A1 (it) * 2018-08-03 2020-02-03 Fraron Srl Veicolo semovente per la frantumazione di suoli
CN111622289B (zh) * 2020-06-24 2023-09-01 中国科学院武汉岩土力学研究所 水力机械联合破岩铣轮、双轮铣槽机及其成槽施工方法
CN114875758B (zh) * 2022-07-08 2022-09-27 徐州徐工筑路机械有限公司 一种地面材料去除用地面铣刨机

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Also Published As

Publication number Publication date
CN204343148U (zh) 2015-05-20
EP2837740A1 (de) 2015-02-18
US20150043971A1 (en) 2015-02-12
DE102013013304A1 (de) 2015-02-12
CN104372730A (zh) 2015-02-25
CN104372730B (zh) 2016-09-28
US9217228B2 (en) 2015-12-22

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