EP3904603A1 - Fraise pour parois moulées - Google Patents

Fraise pour parois moulées Download PDF

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Publication number
EP3904603A1
EP3904603A1 EP20172107.3A EP20172107A EP3904603A1 EP 3904603 A1 EP3904603 A1 EP 3904603A1 EP 20172107 A EP20172107 A EP 20172107A EP 3904603 A1 EP3904603 A1 EP 3904603A1
Authority
EP
European Patent Office
Prior art keywords
oil
trench wall
heat exchanger
wall cutter
milling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20172107.3A
Other languages
German (de)
English (en)
Other versions
EP3904603C0 (fr
EP3904603B1 (fr
Inventor
Christoph Schröppel
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.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
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.)
Filing date
Publication date
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to EP20172107.3A priority Critical patent/EP3904603B1/fr
Priority to US17/997,475 priority patent/US20230175230A1/en
Priority to CN202180031702.4A priority patent/CN115485436A/zh
Priority to PCT/EP2021/055501 priority patent/WO2021219279A1/fr
Publication of EP3904603A1 publication Critical patent/EP3904603A1/fr
Application granted granted Critical
Publication of EP3904603C0 publication Critical patent/EP3904603C0/fr
Publication of EP3904603B1 publication Critical patent/EP3904603B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22—Component parts
    • E02F3/24—Digging wheels; Digging elements of wheels; Drives for wheels
    • E02F3/246—Digging wheels; Digging elements of wheels; Drives for wheels drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/14—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits

Definitions

  • the invention relates to a trench wall cutter with at least one pair of cutting wheels, at least one bearing plate on which the cutting wheels of a pair are rotatably arranged on both sides of the bearing plate, a base frame on the underside of which the at least one bearing plate is attached, and a cutting wheel drive for driving the Milling wheels via a gear lubricated with gear oil in the end shield, according to the preamble of claim 1.
  • a trench wall cutter of the generic type is from the EP 1 637 794 B1 known.
  • an oil circuit is arranged between the cutting wheels, which are arranged at a lower end of the bearing plate, and a frame housing with the cutting wheel drive.
  • oil is conveyed from the cutting wheels through the cutting shield up to the cutting wheel drive in the housing.
  • An oil return follows via a return line in the end shield.
  • Another generic trench wall cutter is from the EP 1 580 327 B1 known.
  • a drive torque of a single drive motor is transmitted via a central drive shaft in a bearing plate to a sun gear, from which the torque is distributed to the individual cutter wheel pairs.
  • the invention is based on the object of specifying a trench wall cutter in which a particularly high cutting performance is guaranteed with reliable lubrication of a gear arrangement for driving the cutting wheels.
  • the trench wall cutter according to the invention is characterized in that at least one heat exchanger is arranged above the end shield and that an oil circuit is formed to cool the transmission oil, to which the at least one heat exchanger is connected above the end shield.
  • a basic idea of the invention is based on the knowledge that the gear arrangement in a trench wall cutter is exposed to considerable forces, in particular when milling through harder layers of soil or rock, which can result in severe heating of the gear oil. Excessive heating of the gear oil can cause a lubricating film on the contacting gear wheels to tear off and lead to increased wear on the gear wheels and on the bearings. This can limit the milling performance and shorten the service life of the gear unit.
  • an oil circuit with at least one heat exchanger through which the transmission oil is passed.
  • the heat exchanger is located away from the milling point and the end shield with the gear, namely above the end shield.
  • the oil circuit can be created by means of oil lines.
  • targeted cooling takes place in an exposed area in the liquid-filled milling slot of the housing above the milling wheels and above the end shield.
  • This area on or even above the base frame offers the possibility of a very large-area wall formation of a preferably plate-shaped heat exchanger.
  • Several heat exchangers can also be arranged. In this way, even if the transmission oil in the oil circuit is very hot, it can be cooled to a desired operating temperature, so that the oil has a desired viscosity for forming a stable lubricating film during operation. In this way, particularly high milling capacities can be achieved.
  • a preferred embodiment of the invention consists in that the heat exchanger is designed as a plate which is releasably attached to the base frame or to a holding device above the base frame.
  • the heat exchanger can therefore be attached to struts of the base frame or to the holding device on which the base frame is suspended.
  • the holding device can be a guide rod, a tether and / or feed lines.
  • the milling drive is arranged in a housing and that the heat exchanger is formed in or on an outer wall of the housing.
  • the base frame is essentially formed by the housing of the milling wheel drive.
  • the heat exchanger can be designed to be compact on the housing.
  • the outer wall of the housing is designed as a cooling wall, at least one groove in which a hose-shaped or tubular line is arranged to form an oil line channel on an inner side of the cooling wall.
  • the at least one outer wall of the housing can be designed as a cooling wall in which at least one oil line channel is arranged, with oil for cooling being able to be conducted through the at least one oil line channel in the outer wall of the housing.
  • a preferred embodiment of the invention consists, in particular, in the fact that the oil line channel is designed in the form of a loop, preferably in a meandering manner, in the outer wall of the housing. A particularly strong and rapid cooling of the oil in the cooling wall can hereby be achieved.
  • the heat exchanger is designed in particular as a separate plate which is releasably attached. This means that existing trench wall cutters can also be retrofitted or converted.
  • the plate can be in two parts, a cover plate covering an oil line channel in a base plate.
  • the cooling plate can also be applied, in particular screwed, to a housing wall with a smooth surface.
  • a particularly expedient embodiment is achieved in that at least one groove is made on an inside of the cooling wall in order to form the oil line channel, in which a hose or tubular line is arranged.
  • the groove can run in a loop or meander shape.
  • the plate-shaped heat exchanger comprises a metal with high thermal conductivity, in particular aluminum or an aluminum alloy.
  • a metal is provided which has a higher thermal conductivity than steel. In this way, a particularly strong cooling effect can be achieved.
  • a cooling capacity of approx. 3.2 kW was achieved using a steel plate, while a cooling capacity of approx. 11.2 kW was achieved using an aluminum plate.
  • the pumping device can be an electrically or hydraulically driven pump, preferably with a variable delivery volume.
  • the pumping device can be driven by a control device which changes the delivery flow through the oil line channel as a function of the current oil temperature, which can be detected for example by a temperature sensor. In this way, heat can be dissipated as required.
  • a particularly simple embodiment of a trench wall cutter according to the invention is achieved in that the pumping device comprises a shaft driven by the cutter drive, which is provided with at least one conveying helix on its outside to form a worm pump.
  • the shaft of the pumping device can be driven to rotate by the milling wheel drive via a separate drive train.
  • the shaft is the drive shaft which extends from the cutting wheel drive through the bearing plate to the cutting wheels.
  • the drive shaft runs essentially vertically and is provided on its outside with a conveyor helix, in particular grooves, through which oil in the shaft channel is conveyed upwards by the milling wheels along the shaft.
  • the milling wheel drive preferably comprises one or more hydraulic motors.
  • a control valve which blocks an oil line channel of the oil circuit at a first low temperature and releases the oil line channel at a second, higher temperature.
  • the control valve can be operated by the control already mentioned above, depending on the oil temperature.
  • the oil line channel will be blocked so that the gear oil is heated to the operating temperature as quickly as possible.
  • the control valve can then open and release the oil line channel.
  • oil can flow through the oil line channel into the heat exchanger, so that a corresponding cooling can be achieved.
  • the at least one cooling wall can be arranged at any point on the outside of the housing or the milling frame. According to one embodiment of the invention, it is particularly advantageous that at least two cooling walls are provided, which are arranged on the longitudinal sides of the housing. In this way, sufficient cooling can take place even if the heating is particularly strong.
  • the housing can be designed as a lattice frame on or in which one or more cooling plates are arranged.
  • a trench wall cutter 10 according to the invention according to Fig. 1 has a base frame 30 with a housing 31, on the underside of which two plate-shaped bearing plates 14 are attached.
  • a milling wheel 12 with a multiplicity of milling teeth 13 for milling off soil material is rotatably mounted on each end of the end shields 14.
  • a wedge-shaped suspension feed 16 can be arranged between the two pairs of milling wheels 12 on the underside of the base frame 30.
  • a support and milling suspension can be introduced into the milling slot formed via the suspension feed 16.
  • the supplied suspension can be provided with a binding agent, whereby a so-called soil cement can be formed by mixing with the milled soil, which can harden in the milled slot to form a diaphragm wall segment.
  • Plate-shaped adjusting and guide elements 18 are provided along the narrow sides of the base frame 30. These can rest on the wall of the milling slot during milling operation, wherein the trench wall milling machine 10 can be guided and adjusted in the milling slot by a corresponding adjustment of the adjusting elements 18.
  • a cable suspension or a guide rod for holding and vertically adjusting the trench wall cutter 10 in the milling trench is provided in a known manner.
  • a plate-shaped outer wall 32 is provided on one or preferably both longitudinal sides of the box-shaped base frame 30, in order to form a heat exchanger 60, which as one in the Figures 2 and 3 cooling wall 34 shown in more detail is formed.
  • the cooling wall 34 can form a wall of the housing 31.
  • the heat exchanger 60 with the cooling wall 34 is shown in FIG Fig. 3 designed as a flat plate, preferably made of stainless steel.
  • the cooling wall 34 has an inner side 35 directed towards the housing 31 and an opposite outer side 37 which forms an outside of the housing 31 in the assembled state.
  • a groove 38 is milled along the inside 35 of the cooling wall 34, which, as shown in FIG Fig. 2 Is designed in a meandering manner.
  • a line 40 made of a metallic tube, for example made of copper, is inserted into this loop-shaped groove 38. The line 40 thus forms the oil line channel 36 in the cooling wall 34.
  • the line 40 has connections 42 at its ends with which the heat exchanger 60 can be connected to an oil circuit 50, which is partially shown schematically in FIG Fig. 4 is shown.
  • a partially indicated milling wheel drive 20 is shown with numerous bearings. From the cutting wheel drive 20, an only partially illustrated drive shaft 22 for each bearing plate 14 goes down to the cutting wheels 12 below.
  • the drive shaft 22 is provided on its outside with conveying grooves, not shown, which can convey a gear oil from the area of the cutting wheels 12 upwards in the direction of the cutting wheel drive 20.
  • the oil flows through the bearings and gear arrangement of the only schematically indicated milling wheel drive 20.
  • the milling wheel drive 20 can preferably comprise at least one hydraulic motor and an output and distribution gear.
  • At least part of the transmission oil is fed via a pump device (not shown) via a feed 44 of an oil circuit 50 to an upper connection of the heat exchanger 60 with a meandering oil line duct 36 in the cooling wall 34.
  • the heated oil can flow through the meandering oil line duct 36 in the cooling wall 34 from top to bottom and in the process give off heat to the cooling wall 34 with its free outer side directed towards the suspension-filled slot.
  • the oil line channel 36 can be formed in the cooling wall 34 with a slight gradient of, for example, approximately 15 °, so that an oil flow can be set without a great deal of pressure.
  • the cooled transmission oil is fed back to the milling wheel drive 20 via a return 46 of the oil circuit 50.
  • the gear oil can be conducted from the cutting wheel drive 20 down to the cutting wheels with the distribution gear.
  • the oil which has been warmed up again, in particular in the area of the transfer gear, can then again go upwards via the conveying effect of the drive shaft 22 to the milling wheel drive 20 and the heat exchanger 60 above the bearing plate 14.
  • a control valve 28 is provided on the flow 44 or, as shown, on the return 46. This can control the oil flow through the oil line channel 36 at the intended temperatures and block or open it as a whole.
  • the control takes place as a function of temperature sensors, not shown, which measure a temperature of the transmission oil at one or more points in the oil circuit 50.
  • the cooling circuit can also have a branch for pressure equalization of the gear arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Details Of Gearings (AREA)
  • Drilling And Boring (AREA)
EP20172107.3A 2020-04-29 2020-04-29 Fraise pour parois moulées Active EP3904603B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20172107.3A EP3904603B1 (fr) 2020-04-29 2020-04-29 Fraise pour parois moulées
US17/997,475 US20230175230A1 (en) 2020-04-29 2021-03-04 Trench cutter
CN202180031702.4A CN115485436A (zh) 2020-04-29 2021-03-04 槽壁铣削机
PCT/EP2021/055501 WO2021219279A1 (fr) 2020-04-29 2021-03-04 Fraise pour parois moulées

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20172107.3A EP3904603B1 (fr) 2020-04-29 2020-04-29 Fraise pour parois moulées

Publications (3)

Publication Number Publication Date
EP3904603A1 true EP3904603A1 (fr) 2021-11-03
EP3904603C0 EP3904603C0 (fr) 2023-08-23
EP3904603B1 EP3904603B1 (fr) 2023-08-23

Family

ID=70480123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20172107.3A Active EP3904603B1 (fr) 2020-04-29 2020-04-29 Fraise pour parois moulées

Country Status (4)

Country Link
US (1) US20230175230A1 (fr)
EP (1) EP3904603B1 (fr)
CN (1) CN115485436A (fr)
WO (1) WO2021219279A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4455407A1 (fr) * 2023-04-26 2024-10-30 BAUER Maschinen GmbH Dispositif d'excavation pour la construction de diaphragmes et procédé de réalisation d'une fouille de fondation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07138979A (ja) * 1993-11-15 1995-05-30 Ohbayashi Corp 掘削機
EP1580327B1 (fr) 2004-03-26 2008-05-21 BAUER Maschinen GmbH Appareil pour creuser des tranchées dans le sol
EP2924174A1 (fr) * 2014-03-24 2015-09-30 Soilmec S.p.A. Équipement d'excavation à système hydraulique amélioré relatif
EP1637794B1 (fr) 2004-09-16 2015-11-11 BAUER Maschinen GmbH Fraise pour parois moulées
EP3467209A1 (fr) * 2017-10-06 2019-04-10 Soilmec S.p.A. Outil d'excavation pour la construction de diaphragmes et équipement lié
EP3701091A1 (fr) * 2018-12-06 2020-09-02 Liebherr-Werk Nenzing GmbH Engin spécial de génie civil, notamment fraiseuse à rideau souterrain

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271879A (en) * 1979-02-21 1981-06-09 Deborah Shivers Hydraulic stump cutting and digging apparatus
FR2899608B1 (fr) * 2006-04-06 2010-04-16 Cie Du Sol Outillage de forage
CN101285310B (zh) * 2008-06-05 2010-08-18 谢沃林 一种双轮铣槽机
CN103363273A (zh) * 2012-04-08 2013-10-23 宁波市镇海捷登应用技术研究所 一种轴承及该轴承的润滑装置
US20150041414A1 (en) * 2013-08-09 2015-02-12 Ledwell & Son Enterprises, Inc. Hydraulic fluid cooler and filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07138979A (ja) * 1993-11-15 1995-05-30 Ohbayashi Corp 掘削機
EP1580327B1 (fr) 2004-03-26 2008-05-21 BAUER Maschinen GmbH Appareil pour creuser des tranchées dans le sol
EP1637794B1 (fr) 2004-09-16 2015-11-11 BAUER Maschinen GmbH Fraise pour parois moulées
EP2924174A1 (fr) * 2014-03-24 2015-09-30 Soilmec S.p.A. Équipement d'excavation à système hydraulique amélioré relatif
EP3467209A1 (fr) * 2017-10-06 2019-04-10 Soilmec S.p.A. Outil d'excavation pour la construction de diaphragmes et équipement lié
EP3701091A1 (fr) * 2018-12-06 2020-09-02 Liebherr-Werk Nenzing GmbH Engin spécial de génie civil, notamment fraiseuse à rideau souterrain

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4455407A1 (fr) * 2023-04-26 2024-10-30 BAUER Maschinen GmbH Dispositif d'excavation pour la construction de diaphragmes et procédé de réalisation d'une fouille de fondation

Also Published As

Publication number Publication date
US20230175230A1 (en) 2023-06-08
EP3904603C0 (fr) 2023-08-23
EP3904603B1 (fr) 2023-08-23
CN115485436A (zh) 2022-12-16
WO2021219279A1 (fr) 2021-11-04

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