EP3701091A1 - Engin spécial de génie civil, notamment fraiseuse à rideau souterrain - Google Patents

Engin spécial de génie civil, notamment fraiseuse à rideau souterrain

Info

Publication number
EP3701091A1
EP3701091A1 EP19789960.2A EP19789960A EP3701091A1 EP 3701091 A1 EP3701091 A1 EP 3701091A1 EP 19789960 A EP19789960 A EP 19789960A EP 3701091 A1 EP3701091 A1 EP 3701091A1
Authority
EP
European Patent Office
Prior art keywords
pressure
civil engineering
engineering machine
chamber
sealing
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
EP19789960.2A
Other languages
German (de)
English (en)
Other versions
EP3701091B1 (fr
Inventor
Hans Reinhardt
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
Original Assignee
Liebherr Werk Nenzing 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=68289988&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3701091(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP3701091A1 publication Critical patent/EP3701091A1/fr
Application granted granted Critical
Publication of EP3701091B1 publication Critical patent/EP3701091B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • 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
    • 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

Definitions

  • the invention relates to a special foundation machine, in particular trench cutter, with at least one rotating tool and at least one tool, which is arranged within a housing of the machine tool and in the region of its shaft exit to the driven tool has at least one bearing seal for sealing the interior of the housing from the environment.
  • the working device sunk in the supporting liquid is exposed to a pressure load from the outside, which increases with increasing depth. Because of the content of water and minerals that are corrosive and abrasive to mechanical components of the tool drive. penetration of support fluid into the drive must always be prevented.
  • Frequently used sealing systems usually provide mechanical seals that have to be pressurized from the inside with a pressure that is generated, which ideally should be slightly above the prevailing external pressure.
  • Such che solutions often start from a drive housing of a slot milling machine, the interior of which is filled with gear oil and the pressure level is adjusted via a hydraulic adjusting piston.
  • a disadvantage of the solution presented is that the complete drive housing must be filled with oil in order to be able to handle the pressure change in the housing with an acceptable system size of control pistons, expansion tanks or the like. Especially when using gears, this leads to considerable losses in efficiency due to hydrodynamic processes (so-called flanges), along with considerable thermal stress on lubricants, bearings and sealing materials.
  • this system with actuating pistons is subject to an unavoidable hysteresis due to frictional losses in the piston seal, which affects the accuracy of the pressurization, especially at low working depths and changing directions of movement of the implement.
  • An alternative solution is known from EP 1 529 924 A1.
  • An electronic solution is used here, which suggests a sensor-based active measurement of the pressure level, appropriate signal processing and subsequent pressure control using electronic control.
  • sensor-based systems with active pressure control require a damping device in order to compensate for switching operations and to be able to process any control deviations.
  • the object of the present invention is therefore to look for an alternative solution that at least partially overcomes the above-mentioned problem.
  • the at least one bearing seal of the special civil engineering machine from at least two separate sealing elements.
  • a sealing chamber lying between the sealing elements is formed, which can be acted upon with a definable pressure level.
  • This pressure chamber is separated from the rest of the housing in terms of printing technology.
  • the deep foundation machine sunk in the construction pit and in particular within a liquid is exposed to a pressure load from outside which increases with increasing depth.
  • this pressure load is referred to below as the ambient pressure.
  • the pressure level in the sealing chamber must now be adjusted by a pressure compensation device so that it is equal to or higher than the ambient pressure, because only in this way can a satisfactory sealing effect of the at least one sealing element be ensured.
  • the special foundation engineering machine is, in particular, a trench wall cutter with one or more cutter wheels as a tool, which are set in rotation via at least one cutter drive accommodated in a housing.
  • the corresponding bearing seal with the configuration according to the invention is provided in the area of the drive shaft emerging from the housing.
  • the sealing chamber is sealed from the surroundings by an outer sealing element, the outer sealing element preferably having sufficient material resistance to a substance, in particular liquid, surrounding the special foundation engineering machine in special foundation engineering.
  • the outer sealing element is sufficiently resistant to a supporting liquid filled in the trench, which usually consists of water, clay minerals and other additives.
  • a sealing element is able to withstand the abrasive and corrosive properties of the surrounding support fluid. To do this, however, it requires the required pressure from the sealing chamber.
  • the outer sealing element is preferably a mechanical seal.
  • a significantly less material-resistant sealing element can be used as the inner sealing element, that is to say the sealing element that seals the sealing chamber from the tool drive or a gear space, since this does not come into contact with the soiling of the supporting fluid mentioned above, but only with the pressure medium used within the sealing chamber on the one hand or any substances located within the tool drive / gear chamber, in particular the gear oil.
  • This flexibility gained when selecting the appropriate sealing material has the advantage that a pressure-resistant material can be used here, but the sealing effect is independent of the pressure.
  • An elastomer seal is suitable, for example.
  • the sealing chamber can be hermetically sealed, i.e. compared to the ambient pressure and / or the housing space or gear compartment. It is also conceivable that at least one pressure relief to the housing space or gear space is provided instead. For example, the sealing chamber is relieved via at least one throttle to the housing space, in particular the gear space.
  • any type of pressure compensation device can be used to implement the present invention, which is suitable for setting the present pressure level within the sealing chamber as a function of the ambient pressure.
  • a pressure level should particularly preferably be slightly higher than the ambient pressure, so that a sufficient sealing effect of the outer seal can be ensured.
  • a newly designed pressure compensation device which comprises at least one pump whose pressure outlet is directly or indirectly connected to the sealing chamber in order to apply the required chamber pressure as a function of the ambient pressure.
  • a throttle can be integrated between the pressure side of the pump and the sealing chamber.
  • the suction side of the pump is connected to the housing interior of the tool drive, in particular the gear space of the milling drive.
  • the pressure outlet of the pump is connected to the sealing chamber.
  • the pump sucks a volume flow in Substance located in the gearbox, in particular gear oil, and pumps this sen at least partially into the sealing chamber.
  • a pressure relief valve can be installed on the pressure side of the pump, the pressure input of which is connected to the pressure side of the pump.
  • This switching structure enables an exact setting of the pressure level achieved within the sealing chamber by adjusting the degree of opening of the pressure relief valve. By setting the opening pressure in a targeted manner, the achievable pressure level in the sealing chamber can be influenced and set with sufficient accuracy. It is not necessary to change the swallowing volume of the pump.
  • the pressure relief valve used is preferably pilot-controlled in order to be able to adjust the opening pressure and thus the desired target pressure level within the sealing chamber accordingly.
  • the control pressure connection is connected to a membrane via a control pressure volume.
  • the control pressure volume and the ambient pressure act on the membrane on the one hand, so that changes in the ambient pressure automatically lead to an adjustment of the opening pressure of the pressure relief valve. E.g. leads to an increase in the ambient pressure to a corresponding increase in the control pressure, which ultimately the target pressure level within the Dichtkam mer is adjusted accordingly.
  • the pressure level within the sealing chamber is set exactly to the ambient pressure or to an exact difference to the ambient pressure.
  • An additional one can be used to set a desired pressure difference direct control of the pressure relief valve can be seen by means of spring preload.
  • the spring preload acts against the control pressure on the pressure relief valve, ie the valve piston, so that the spring preload defines the desired pressure difference between the pressure level within the sealing chamber and the ambient pressure.
  • a pressure limiting valve with adjustable spring preload is used.
  • the outlet of the pressure relief valve can, for example, be connected directly to the gear space of the tool drive or milling drive in order to return the gear oil to the housing or gear space in the sense of a closed circuit.
  • the implementation of the proposed oil circuit of the transmission oil enables the use of additional components, such as an oil filter, a heat exchanger or another analysis device for monitoring and evaluating the oil properties.
  • additional components such as an oil filter, a heat exchanger or another analysis device for monitoring and evaluating the oil properties.
  • the analysis device can be used, for example, to detect any contamination of the gear oil in good time and thereby to be able to conclude that the bearing seal has a decreasing sealing effect.
  • the aforementioned components are preferably installed in the return line from the pressure relief valve to the gear chamber.
  • Figure 1 a hydraulic circuit diagram of the trench cutter according to the invention according to a first embodiment
  • Figure 2 is a hydraulic circuit diagram of a slightly modified embodiment compared to the embodiment of Figure 1.
  • FIG. 1 shows a hydraulic circuit diagram for a trench cutter according to the invention, which comprises a housing, not shown, in which a milling drive is housed.
  • the milling drive comprises the two milling wheel gears 1, which are driven by a common fly hydraulic motor 2.
  • Several drive shafts emerge from the housing and must be sealed by means of the bearing seals 9, 10, which are explained in detail below.
  • a pump unit 3 draws in a low, constant oil flow from the transmission interior 4, which flows through the pressure relief valve 5.
  • the pressure relief valve 5 has an adjustable spring preload and a control pressure connection 7. The ambient pressure acts directly on an oil volume via the membrane 6, which acts on the control pressure connection 7 of the valve 5.
  • the pressure generated by the pump 3 and by means of the pressure relief valve 5 is applied to the oil-filled sealing chamber 8, which is sealed by a mechanical seal 9 against the environment and an elastomeric seal 10 against the interior of the transmission 1.
  • the ambient pressure in the supporting fluid can assume values between atmospheric pressure and approx. 20 - 25 bar.
  • Seals 9 and 10 separate the overall sealing task of the bearing seal into two sub-tasks, for which they are each designed:
  • Seal 9 is able to withstand the abrasive and corrosive properties of the surrounding supporting fluid, but this requires a pressure in the sealing chamber 8, which must be adhered to as precisely as possible and is approximately 2 bar above the pressure of the surrounding supporting fluid, with less than 1 bar tolerance.
  • Seal 10 tolerates the potentially high differential pressure between the environment and the gearbox interior, but is dependent on the cleanliness of the surrounding fluids.
  • the pressure relief valve 5 influences the pressure in the sealing chamber 8 by adding the spring pressure (2 bar) to the ambient pressure in the control connection 7.
  • the valve 5 is continuously flowed through and thus its valve piston is kept in motion, as a result of which pressure peaks are avoided and possible flysteresis effects are kept low.
  • the circulating oil is the transmission 1 via the return line 11 leads again.
  • this returning oil is used to lubricate gear parts whose oil wetting is not ensured by general operation.
  • heat exchangers, filters and devices for oil analysis can be integrated into the line 11 in order to remove heat, clean gear transmission from the oil and detect a deterioration in the sealing effect, in particular by detecting components of the loading Support fluid in the oil.
  • the system presented does not require any electronic components and no further control effort. The sealing effect of the bearing seal is retained even if all control systems fail, as long as the drive unit of the overall system is in operation.
  • FIG. 2 which is slightly modified compared to FIG. 1, the sealing chambers 8 'are not hermetically sealed, but instead are relieved via throttles 13 in the gear chamber 4. Such a modification allows heat to be removed from the sealing chamber 8 'and oil exchange and oil cleaning of the sealing chamber 8'.
  • the remaining structure of the embodiment from FIG. 2 is identical to that of FIG. 1, which is why identical reference numerals have been used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Sealing Devices (AREA)
  • Mechanical Sealing (AREA)
  • Rotary Pumps (AREA)
  • General Details Of Gearings (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

La présente invention concerne un engin spécial de génie civil, notamment une fraiseuse à rideau souterrain, comportant au moins un outil rotatif et un dispositif d'entraînement d'outil qui est disposé à l'intérieur du carter de l'engin spécial de génie civil et rendu étanche par rapport à l'environnement, dans la zone de sa sortie d'arbre hors du carter vers l'outil entraîné au moyen d'au moins un joint de palier, caractérisé en ce que le joint de palier comprend au moins deux éléments d'étanchéité séparés dont l'agencement permet la formation d'une chambre d'étanchéité située entre les éléments d'étanchéité. Un dispositif de compensation de pression est prévu, lequel commande la pression de chambre dans la chambre d'étanchéité en fonction de la pression ambiante de l'engin spécial de génie civil.
EP19789960.2A 2018-12-06 2019-10-17 Machine de forage pur les mur de diaphragma Active EP3701091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018131226.1A DE102018131226A1 (de) 2018-12-06 2018-12-06 Spezialtiefbaumaschine, insbesondere Schlitzwandfräse
PCT/EP2019/078134 WO2020114656A1 (fr) 2018-12-06 2019-10-17 Engin spécial de génie civil, notamment fraiseuse à rideau souterrain

Publications (2)

Publication Number Publication Date
EP3701091A1 true EP3701091A1 (fr) 2020-09-02
EP3701091B1 EP3701091B1 (fr) 2022-11-30

Family

ID=68289988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19789960.2A Active EP3701091B1 (fr) 2018-12-06 2019-10-17 Machine de forage pur les mur de diaphragma

Country Status (6)

Country Link
US (1) US12043974B2 (fr)
EP (1) EP3701091B1 (fr)
JP (1) JP7252337B2 (fr)
CN (1) CN113167046B (fr)
DE (1) DE102018131226A1 (fr)
WO (1) WO2020114656A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3904603A1 (fr) * 2020-04-29 2021-11-03 BAUER Spezialtiefbau GmbH Fraise pour parois moulées

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
GB619082A (en) 1946-11-13 1949-03-03 Megator Pumps & Compressors Lt Improvements in stuffing boxes and like sealing devices
US3153160A (en) 1961-02-09 1964-10-13 Borg Warner Submersible seal
IT1196685B (it) 1984-02-26 1988-11-25 Enrico Risotti Sistema di alimentazione per motori a combustione interna
JPH02304270A (ja) * 1989-05-17 1990-12-18 Hitachi Ltd 横型軸封装置
DE9107187U1 (de) * 1991-06-11 1991-07-25 Bauer Spezialtiefbau GmbH, 8898 Schrobenhausen Fräsrahmen für eine Schlitzwandfräse mit einer Druckausgleichsvorrichtung für die Lagerdichtungen
US5927402A (en) * 1997-02-19 1999-07-27 Schlumberger Technology Corporation Down hole mud circulation for wireline tools
JPH10331187A (ja) 1997-05-29 1998-12-15 Koken Boring Mach Co Ltd 水中地盤掘削機の駆動装置
FI107830B (fi) * 1998-06-08 2001-10-15 Waertsilae Tech Oy Ab Ohjaus- ja varoventtiilijärjestely polttoaineensyöttöjärjestelmässä
DE19846955A1 (de) * 1998-10-12 2000-04-13 Zahnradfabrik Friedrichshafen Unter Last schaltbares Wendegetriebe
FR2806111B1 (fr) 2000-03-13 2002-06-14 Cie Du Sol Appareil de forage en terrain dur
DE10351386A1 (de) 2003-11-04 2005-06-09 Bauer Maschinen Gmbh Getriebe und Verfahren zur Steuerung eines Innendrucks in dem Getriebe
JP2005163928A (ja) * 2003-12-03 2005-06-23 Koyo Seiko Co Ltd 軸受装置及びディファレンシャル装置
DE502004005969D1 (de) 2004-08-23 2008-03-06 Bauer Maschinen Gmbh Verfahren und Schlitzwandfräsvorrichtung zum Herstellen einer Schlitzwand im Boden
EP1703023B1 (fr) 2005-03-18 2011-06-22 BAUER Maschinen GmbH Benne de forage pour creuser des tranchées dans le sol avec commande de direction
NO332761B1 (no) * 2007-09-07 2013-01-07 Framo Eng As Undersjoisk ventilsystem og fremgangsmate for beskyttelse herav
CN201269071Y (zh) * 2008-10-17 2009-07-08 大庆石油学院 一种新型带压作业压力平衡控制装置
FR2991022B1 (fr) 2012-05-23 2015-03-20 Alstom Hydro France Systeme d'etancheite a compensation de pression pour arbre de rotation ou de translation.
JP6056212B2 (ja) * 2012-06-25 2017-01-11 ダイキン工業株式会社 自動車用トランスミッションオイルシール
WO2014157946A1 (fr) * 2013-03-26 2014-10-02 두산인프라코어 주식회사 Système hydraulique pour équipement de construction
CN103591148B (zh) * 2013-08-16 2016-02-24 天才诺尔顿精密机械(北京)有限公司 一种农用机械的旋转密封装置
US10077806B2 (en) * 2015-07-15 2018-09-18 National Tsing Hua University Compact bearing system and machine stage system equipping the same
DK3179123T3 (da) * 2015-12-08 2019-05-20 Siemens Gamesa Renewable Energy As Overvågning af påfyldningsniveau af smøremiddel i et leje

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3904603A1 (fr) * 2020-04-29 2021-11-03 BAUER Spezialtiefbau GmbH Fraise pour parois moulées
WO2021219279A1 (fr) * 2020-04-29 2021-11-04 Bauer Spezialtiefbau Gmbh Fraise pour parois moulées

Also Published As

Publication number Publication date
WO2020114656A1 (fr) 2020-06-11
JP7252337B2 (ja) 2023-04-04
US12043974B2 (en) 2024-07-23
CN113167046A (zh) 2021-07-23
DE102018131226A1 (de) 2020-06-10
US20220049449A1 (en) 2022-02-17
JP2022520146A (ja) 2022-03-29
CN113167046B (zh) 2023-01-10
EP3701091B1 (fr) 2022-11-30

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