EP3701091B1 - Machine de forage pur les mur de diaphragma - Google Patents

Machine de forage pur les mur de diaphragma Download PDF

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Publication number
EP3701091B1
EP3701091B1 EP19789960.2A EP19789960A EP3701091B1 EP 3701091 B1 EP3701091 B1 EP 3701091B1 EP 19789960 A EP19789960 A EP 19789960A EP 3701091 B1 EP3701091 B1 EP 3701091B1
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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.)
Active
Application number
EP19789960.2A
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German (de)
English (en)
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EP3701091A1 (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
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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 civil engineering machine, in particular a trench cutter, with at least one rotating tool and at least one tool drive, which is arranged inside a housing of the machine tool and has at least one bearing seal for sealing the interior of the housing from the environment in the area of its shaft outlet to the driven tool.
  • the tool immersed in the support liquid is exposed to a pressure load from the outside which increases with increasing depth. Because of the water and mineral content, which have a corrosive and abrasive effect on the mechanical components of the tool drive the ingress of supporting liquid into the drive must be prevented at all times.
  • this system with adjusting pistons is subject to an unavoidable hysteresis due to friction losses in the piston seal, which impairs the accuracy of the pressurization, especially at low working depths and changing direction of movement of the working device.
  • An alternative solution is from the EP 1 529 924 A1 known.
  • An electronic solution is used here that proposes a sensor-based active measurement of the pressure level, appropriate signal processing and subsequent pressure control by means of electronic control.
  • sensor-based systems with active pressure control require a damping device in order to compensate for switching processes and to be able to process any control deviations.
  • the object of the present invention is therefore to look for an alternative solution which knows how to at least partially overcome the above-mentioned problem.
  • the at least one bearing seal of the deep foundation construction machine be constructed from at least two separate sealing elements.
  • a sealing chamber lying between the sealing elements is formed, to which a definable pressure level can be applied.
  • this pressure chamber is separated from the rest of the housing space.
  • the special civil engineering machine that is submerged in the excavation pit and in particular within a liquid is exposed to a pressure load from the outside which increases with increasing depth.
  • this pressure load is referred to below as ambient pressure.
  • the pressure level in the sealing chamber must now be adjusted by a pressure equalization device so that it is equal to or higher than the ambient pressure, because this is the only way to ensure a satisfactory sealing effect of the at least one sealing element.
  • the special civil engineering machine is in particular a trench wall cutter with one or more cutting wheels as a tool, which are rotated by at least one cutting drive housed in a housing.
  • the corresponding bearing seal with the design according to the invention is provided in the area of the drive shaft emerging from the housing.
  • the sealing chamber is sealed off from the environment by an outer sealing element, the outer sealing element preferably having sufficient material resistance to a substance surrounding the special foundation engineering machine in special foundation engineering, in particular liquid.
  • the outer sealing element is sufficiently resistant to a supporting liquid that is filled into the trench and mostly consists of water, clay minerals and other additives.
  • such a sealing element is able to withstand the abrasive and corrosive properties of the surrounding support liquid.
  • the outer sealing element is preferably a mechanical seal.
  • a significantly less material-resistant sealing element can be used as the inner sealing element, i.e. the sealing element that seals the sealing chamber from the tool drive or a gear chamber, since it does not come into contact with the aforementioned contamination of the supporting liquid, but only with the pressure medium used inside the sealing chamber on the one hand or any substances located within the tool drive/gear box, in particular the gear oil.
  • This flexibility gained in the selection of the appropriate sealing material has the advantage that a material that is not pressure-resistant can be used here, but its sealing effect is independent of the pressure.
  • An elastomer seal for example, is suitable.
  • the sealing chamber can be hermetically sealed, i.e. against the ambient pressure and/or the housing space or gear space. 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 of pressure towards the housing space, in particular the gear space, via at least one throttle.
  • any type of pressure equalization device that is suitable for setting the existing pressure level within the sealing chamber as a function of the ambient pressure can be used to implement the present invention.
  • 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 connected directly or indirectly 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 inside of the housing of the tool drive, in particular to the gear compartment of the milling drive.
  • the pressure outlet of the pump is connected to the sealing chamber.
  • the pump sucks in a volume flow of an im Substance located in the transmission space, in particular transmission oil, and pumps it at least partially into the sealing chamber.
  • a pressure relief valve can be installed on the pressure side of the pump for setting the target pressure level within the sealing chamber, the pressure inlet of which is connected to the pressure side of the pump.
  • This switching structure enables the pressure level achieved within the sealing chamber to be set precisely by adjusting the degree of opening of the pressure relief valve.
  • the achievable pressure level in the sealing chamber can be influenced and adjusted with sufficient accuracy by targeted adjustment of the opening pressure. It is not necessary to change the displacement of the pump.
  • the pressure-limiting valve used is preferably pilot-controlled in order to be able to set the opening pressure and thus the desired desired pressure level within the sealing chamber accordingly.
  • the control pressure port is connected to a diaphragm via a control pressure volume.
  • the control pressure volume and, on the other hand, the ambient pressure act on the membrane, so that changes in the ambient pressure automatically lead to an adjustment of the opening pressure of the pressure-limiting valve. For example, an increase in the ambient pressure leads to a corresponding increase in the control pressure, as a result of which the setpoint pressure level within the sealing chamber is ultimately adjusted accordingly.
  • the pressure level within the sealing chamber can be set exactly to the ambient pressure or to an exact difference from the ambient pressure.
  • an additional direct control of the pressure relief valve can be provided 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 relief valve with adjustable spring preload is used.
  • the output of the pressure-limiting valve can, for example, be connected directly to the gear chamber of the tool drive or milling drive in order to return the gear oil to the housing or gear chamber in the sense of a closed circuit.
  • the implementation of the proposed oil circuit of the transmission oil allows the use of additional components, such as an oil filter, a heat exchanger or another analysis device for monitoring and evaluating the oil properties.
  • Sufficient cooling of the transmission oil can be provided by means of the heat exchanger, for example, while the filter allows the transmission oil to be cleaned during operation.
  • the analysis device can be used, for example, to detect any contamination of the gear oil in good time and thus to be able to conclude that the sealing effect of the bearing seal is declining.
  • the above components are preferably installed in the return flow from the pressure relief valve to the gear compartment.
  • figure 1 shows a hydraulic circuit diagram for a trench cutter according to the invention, which includes a housing, not shown, in which a cutter drive is accommodated.
  • the milling drive includes the two milling wheel gears 1, which are driven by a common hydraulic motor 2.
  • Several drive shafts emerge from the housing and must be sealed by the bearing seals 9, 10, which will be explained in detail below.
  • a pump unit 3 draws in a small, constant flow of oil from the interior of the transmission 4 , which flows through the pressure-limiting 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 controlled by the pressure-limiting valve 5 is applied to the oil-filled sealing chamber 8 , which is sealed off from the environment by a mechanical seal 9 and from the interior of the transmission 1 by an elastomer seal 10 .
  • the pressure in the transmission space 4 is approximately atmospheric, depending on the temperature, regardless of the penetration depth of the drive in the supporting liquid. opposite the ambient pressure in the support liquid can assume values between atmospheric pressure and approx. 20 - 25 bar with the usual working depths.
  • the 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 support liquid, but this requires a pressure in the sealing chamber 8 which must be maintained as precisely as possible and is approx. 2 bar above the pressure of the surrounding support liquid, with less than 1 bar tolerance.
  • Seal 10 can withstand the potentially high differential pressure between the environment and the interior of the transmission, 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 port 7.
  • the valve 5 is constantly flowed through and its valve piston is thus kept in motion, whereby pressure peaks are avoided and possible hysteresis effects are kept low.
  • the circulating oil is fed back to the transmission 1 via the return line 11 .
  • 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 dissipate heat, clean transmission abrasion from the oil and detect a reduction in the sealing effect, in particular by detecting components of the supporting liquid in the oil .
  • the system presented does not require any electronic components and no additional control effort.
  • the sealing effect of the bearing seal is maintained even if all control systems fail, as long as the drive unit of the entire system is in operation.

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

Claims (9)

  1. Machine spéciale de génie civil, en particulier fraiseuse de parois moulées, comprenant
    au moins un outil rotatif (1), et
    un entraînement d'outil qui est disposé à l'intérieur d'un carter de la machine spéciale de génie civil et qui, dans la zone de sa sortie d'arbre hors du carter vers l'outil entraîné (1), est rendu étanche par rapport à l'environnement au moyen d'au moins un joint de palier, où
    le joint de palier comprend au moins deux éléments d'étanchéité séparés (9, 10), dont l'agencement forme une chambre d'étanchéité (8) située entre les éléments d'étanchéité (9, 10), et
    un dispositif de compensation de pression est prévu, qui est conçu pour commander la pression de chambre dans la chambre d'étanchéité (8) en dépendance de la pression ambiante de la machine spéciale de génie civil, de telle sorte que la pression de chambre soit supérieure ou égale à une pression ambiante,
    caractérisée en ce que
    le dispositif de compensation de pression comprend une pompe (3), dans lequel
    une sortie de pression de la pompe (3) est reliée à la chambre d'étanchéité (8) afin d'alimenter celle-ci avec la pression de chambre nécessaire en dépendance de la pression ambiante, et
    la pompe (3) est conçue pour aspirer du lubrifiant depuis l'intérieur d'un carter de l'entraînement d'outil et pour le pomper dans la chambre d'étanchéité (8).
  2. Machine spéciale de génie civil selon la revendication 1, caractérisée en ce que l'élément d'étanchéité extérieur (9) assure l'étanchéité de la chambre d'étanchéité (8) par rapport à l'environnement, l'élément d'étanchéité extérieur (9) présentant de préférence des propriétés de résistance au matériau par rapport à un liquide de support entourant l'élément d'étanchéité (9), l'élément d'étanchéité extérieur (9) étant réalisé en particulier sous forme de garniture mécanique.
  3. Machine spéciale de génie civil selon la revendication 1 ou 2, caractérisée en ce que l'élément d'étanchéité intérieur (10) assure l'étanchéité de la chambre d'étanchéité (8) par rapport à l'espace de carter, en particulier l'espace de transmission (4) de l'entraînement de l'outil, l'élément d'étanchéité intérieur (10) étant idéalement un joint avec un effet d'étanchéité indépendant de la pression, par exemple un joint en élastomère.
  4. Machine spéciale de génie civil selon l'une quelconque des revendications précédentes, caractérisée en ce que la chambre d'étanchéité (8) est fermée hermétiquement, en particulier par rapport à l'environnement de la machine spéciale de génie civil et/ou à l'espace de carter ou à l'espace de transmission (4).
  5. Machine spéciale de génie civil selon la revendication 1, caractérisée en ce que la chambre d'étanchéité (8) est déchargée par au moins un étranglement (13) vers l'espace de carter, en particulier l'espace de transmission (4).
  6. Machine spéciale de génie civil selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une soupape de limitation de pression (5) est prévue à la sortie de pression de la pompe (3) pour régler la pression de chambre générée, la soupape de limitation de pression (5) prévoyant un raccord de pression de commande (7) qui, via un volume de pression de commande, est relié à une membrane (6) qui est conçue pour transmettre des modifications de la pression ambiante au volume de pression de commande dans le raccord de pression de commande (7).
  7. Machine spéciale de génie civil selon la revendication 6, caractérisée en ce que la soupape de limitation de pression (5) est précontrainte par ressort, en particulier prévoit une précontrainte de ressort réglable, la précontrainte de ressort permettant de régler de préférence la pression différentielle de consigne entre la pression de chambre et la pression ambiante.
  8. Machine spéciale de génie civil selon l'une quelconque des revendications précédentes 6 ou 7, caractérisée en ce que la sortie de soupape de la soupape de limitation de pression (5) est reliée à l'espace de carter, en particulier à l'espace de transmission (4) de l'entraînement de l'outil.
  9. Machine spécial de génie civil selon l'une quelconque des revendications précédentes, caractérisée en ce que dans le circuit d'huile formé, au moins un échangeur de chaleur et/ou un filtre d'huile et/ou un dispositif d'analyse d'huile est intégré.
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 EP3701091A1 (fr) 2020-09-02
EP3701091B1 true 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) US20220049449A1 (fr)
EP (1) EP3701091B1 (fr)
JP (1) JP7252337B2 (fr)
CN (1) CN113167046B (fr)
DE (1) DE102018131226A1 (fr)
WO (1) WO2020114656A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3904603B1 (fr) * 2020-04-29 2023-08-23 BAUER Spezialtiefbau GmbH Fraise pour parois moulées

Citations (9)

* Cited by examiner, † Cited by third party
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
DE1188392B (de) 1961-02-09 1965-03-04 Borg Warner Wellendichtung fuer eine im wesentlichen senkrecht angeordnete Welle
EP0152924A2 (fr) 1984-02-16 1985-08-28 Enrico Risotti Système d'admission de carburant pour moteur à combustion interne
DE9107187U1 (de) 1991-06-11 1991-07-25 Bauer Spezialtiefbau GmbH, 8898 Schrobenhausen Fräsrahmen für eine Schlitzwandfräse mit einer Druckausgleichsvorrichtung für die Lagerdichtungen
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
FR2806111A1 (fr) 2000-03-13 2001-09-14 Cie Du Sol Appareil de forage en terrain dur
EP1630298A1 (fr) 2004-08-23 2006-03-01 BAUER Maschinen GmbH Procédée de fabriquer une mure en béton sur sol
EP1703023A1 (fr) 2005-03-18 2006-09-20 BAUER Maschinen GmbH Benne de forage pour creuser des tranchées dans le sol avec commande de direction
EP2667036A1 (fr) 2012-05-23 2013-11-27 ALSTOM Renewable Technologies Système d'étanchéité à compensation de pression pour arbre de rotation ou de translation

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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
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
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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
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
TWI662203B (zh) * 2015-07-15 2019-06-11 國立清華大學 液壓軸承系統及裝配有液壓軸承系統之移動平台系統
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Patent Citations (9)

* Cited by examiner, † Cited by third party
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
DE1188392B (de) 1961-02-09 1965-03-04 Borg Warner Wellendichtung fuer eine im wesentlichen senkrecht angeordnete Welle
EP0152924A2 (fr) 1984-02-16 1985-08-28 Enrico Risotti Système d'admission de carburant pour moteur à combustion interne
DE9107187U1 (de) 1991-06-11 1991-07-25 Bauer Spezialtiefbau GmbH, 8898 Schrobenhausen Fräsrahmen für eine Schlitzwandfräse mit einer Druckausgleichsvorrichtung für die Lagerdichtungen
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
FR2806111A1 (fr) 2000-03-13 2001-09-14 Cie Du Sol Appareil de forage en terrain dur
EP1630298A1 (fr) 2004-08-23 2006-03-01 BAUER Maschinen GmbH Procédée de fabriquer une mure en béton sur sol
EP1703023A1 (fr) 2005-03-18 2006-09-20 BAUER Maschinen GmbH Benne de forage pour creuser des tranchées dans le sol avec commande de direction
EP2667036A1 (fr) 2012-05-23 2013-11-27 ALSTOM Renewable Technologies Système d'étanchéité à compensation de pression pour arbre de rotation ou de translation

Also Published As

Publication number Publication date
US20220049449A1 (en) 2022-02-17
JP2022520146A (ja) 2022-03-29
JP7252337B2 (ja) 2023-04-04
WO2020114656A1 (fr) 2020-06-11
CN113167046B (zh) 2023-01-10
DE102018131226A1 (de) 2020-06-10
CN113167046A (zh) 2021-07-23
EP3701091A1 (fr) 2020-09-02

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