EP0518293A1 - Cadre de fraisage pour une fraiseuse à rideau souterrain avec un dispositif d'égalisation de pression pour les joints de palier - Google Patents

Cadre de fraisage pour une fraiseuse à rideau souterrain avec un dispositif d'égalisation de pression pour les joints de palier Download PDF

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Publication number
EP0518293A1
EP0518293A1 EP92109755A EP92109755A EP0518293A1 EP 0518293 A1 EP0518293 A1 EP 0518293A1 EP 92109755 A EP92109755 A EP 92109755A EP 92109755 A EP92109755 A EP 92109755A EP 0518293 A1 EP0518293 A1 EP 0518293A1
Authority
EP
European Patent Office
Prior art keywords
piston
oil reservoir
pressure
bearing seals
milling frame
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
EP92109755A
Other languages
German (de)
English (en)
Other versions
EP0518293B1 (fr
Inventor
Maximilian Arzberger
Ignaz Seitle
Leonhard Weixler
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
Publication of EP0518293A1 publication Critical patent/EP0518293A1/fr
Application granted granted Critical
Publication of EP0518293B1 publication Critical patent/EP0518293B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • 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

Definitions

  • the invention relates to a milling frame for a trench cutter with oil-lubricated bearing seals for the cutting wheels and with a regulated hydraulic pressure compensation device for the bearing seals.
  • slots are made in civil engineering that can be up to 100 m deep.
  • the slot is filled with a support liquid made of a bentonite and water mixture until the slot wall is produced.
  • a support liquid made of a bentonite and water mixture until the slot wall is produced.
  • the fluid pressure rises, so that the bearing seals for the cutting wheels must be provided with a pressure compensation device in order to prevent the penetration of support fluid or leakage and oil loss.
  • pressure compensation devices rapid changes in the depth of the milling frame or rapid changes in pressure had proven problematic to track the internal pressure of the bearing seals accordingly quickly.
  • the invention has for its object to provide a milling frame with a pressure compensation device of the type mentioned, with which a reliable pressure compensation is carried out even with rapid pressure changes.
  • This object is achieved in that there is a pressure-resistant oil reservoir connected to the seals via lines, and in addition that an air-filled, the buffer space, which is exposed to the external pressure and is arranged vertically below the oil reservoir, the oil reservoir and the buffer space are connected to one another via a longitudinally displaceable piston, and the piston is biased with a compression spring in the direction of the oil reservoir.
  • the invention has the advantage that, due to the spring preload, on the one hand a fixed, predetermined, constant overpressure is generated in the oil reservoir and thus in the bearing seals. Leakage losses can also be compensated for in this way. It prevents the penetration of support fluid even with rapidly increasing external pressure, even if the piston is only delayed or deflected too slowly, for example due to a static friction effect.
  • the air compressed in the buffer space acts as a separating medium between the supporting liquid and the movable parts of the pressure compensation device, so that this critical and sensitive area is protected against contamination.
  • the compression spring is designed as a helical spring which sits on the piston and which is supported on the one hand on a flange on a piston housing and on the other hand on a shoulder on the piston.
  • a particularly smooth guidance is achieved in that the piston is provided with a bush on its side facing the oil reservoir and in that the compression spring lies between the piston and the bush.
  • the bushing is provided at its free end with a bottom on which the associated end face of the piston rests from the inside.
  • a rapid readjustment is also supported in that the piston is hollow to reduce its own weight or to improve buoyancy.
  • the trench wall cutter shown here comprises a rail-guided carriage 10 with a boom 11, on which a milling frame 12 is suspended via a supporting cable 14.
  • a milling frame 12 On the milling frame 12 there are two pairs of milling wheels 13 which are driven by hydraulic motors.
  • a slot filled with a support liquid made of a water / bentonite mixture is designated by 15.
  • a pressure compensation device 16 is screwed to the milling frame 12 and is connected in line with oil-lubricated bearing seals (not shown) of the milling wheels 13.
  • the pressure compensation device 16 serves to readjust the oil pressure in the bearing seals as a function of the external pressure in the supporting fluid in such a way that neither oil emerges from the bearings nor does the supporting fluid enter the bearings.
  • the pressure compensation device 16 comprises a pressure-resistant oil reservoir 17, an air-filled buffer space 18 and a vertically longitudinally displaceable pressure piston 19.
  • the piston 19 and the oil reservoir 17 are located in a cylindrical housing 20 which is attached to the milling frame 12 (FIG. 1) is screwed.
  • a bell 22 surrounding the buffer space 18, which is welded to the housing 20, is secured with a screw 23 on the milling frame.
  • the oil reservoir 17 is provided with a first opening (24) for connection to a hose line, which leads to a pressure measuring device (not shown).
  • the oil reservoir can be filled or refilled via a second closable opening 25.
  • a third opening 26 is used to connect a hose connection to the bearing seals (not shown).
  • the oil reservoir 17 integrated in the housing 20 is limited on the one hand by an extension 27 of a cylinder jacket receiving the piston 19 and on the other hand by a pot 28 of the same length flanged on the end face. At the junction of pot 28 and extension 27, the end of a roller membrane 29 is clamped, which seals the oil reservoir 17 against the piston 19 and the piston guide.
  • the vertically displaceable piston 19 which is designed as a hollow body, acts on one end face over a large area of the oil reservoir 17 in such a way that a piston displacement produces a change in pressure.
  • a piston displacement is triggered by the fact that when the milling frame is lowered or raised, the supporting liquid exerts a corresponding pressure on the free end of the piston 19 in the region of the buffer space 18.
  • the piston 19 is biased against the oil reservoir 17 by a compression spring 30 designed here as a helical spring. It follows that the internal pressure in the oil reservoir 17 is the sum of the external pressure in the slot 15 (Fig. 1) and the spring preload. The spring force can be kept constant over a predetermined distance by appropriate selection of the spring length or the spring travel.
  • the compression spring 30, which surrounds the piston 19, is supported on an annular flange 31 on the free end face of the housing 20.
  • an annular shoulder 32 is formed on the piston 19 for supporting the compression spring 30.
  • a bushing 33 is placed on the piston 19, which overlaps the compression spring 30 on the outside, so that it comes to rest between the bushing 33 and the piston 19.
  • the piston 19 itself and the compression spring 30 are out of contact with the housing wall.
  • a suitable piston guide can be achieved by appropriate selection of the bushing material.
  • the bushing 33 is also provided with a base 34 on which the end face of the piston 19 is supported on the one hand and the roller membrane 29 comes to rest on the other hand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Paleontology (AREA)
  • Earth Drilling (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Machine Tool Units (AREA)
  • Polyethers (AREA)
  • Actuator (AREA)
EP92109755A 1991-06-11 1992-06-10 Cadre de fraisage pour une fraiseuse à rideau souterrain avec un dispositif d'égalisation de pression pour les joints de palier Expired - Lifetime EP0518293B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9107187U 1991-06-11
DE9107187U DE9107187U1 (de) 1991-06-11 1991-06-11 Fräsrahmen für eine Schlitzwandfräse mit einer Druckausgleichsvorrichtung für die Lagerdichtungen

Publications (2)

Publication Number Publication Date
EP0518293A1 true EP0518293A1 (fr) 1992-12-16
EP0518293B1 EP0518293B1 (fr) 1994-08-31

Family

ID=6868200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109755A Expired - Lifetime EP0518293B1 (fr) 1991-06-11 1992-06-10 Cadre de fraisage pour une fraiseuse à rideau souterrain avec un dispositif d'égalisation de pression pour les joints de palier

Country Status (6)

Country Link
EP (1) EP0518293B1 (fr)
JP (1) JP2598204B2 (fr)
KR (1) KR960004272B1 (fr)
AT (1) ATE110819T1 (fr)
DE (2) DE9107187U1 (fr)
TW (1) TW205017B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792342A1 (fr) * 1999-04-16 2000-10-20 Spie Fondations Procede et dispositif de positionnement de poteaux prefondes
EP1529924A1 (fr) * 2003-11-04 2005-05-11 BAUER Maschinen GmbH Groupe de transmission pressurisé et méthode de contrôle de la pression dans ledit groupe
EP1666671A1 (fr) * 2004-12-03 2006-06-07 BAUER Maschinen GmbH Fraise pour paroi moulée
CN107083737A (zh) * 2017-06-19 2017-08-22 侯忠备 一种铣刨机浮动收料装置
WO2020173788A1 (fr) * 2019-02-27 2020-09-03 Liebherr-Components Biberach Gmbh Dispositif d'entraînement pour une fraise de rideau souterrain
BE1027388B1 (de) * 2019-06-13 2021-02-02 Changsha Inst Mining Res Co Ltd Abbaukopf zum abbau von kobaltreicher tiefseekruste

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119210C1 (fr) * 1991-06-11 1993-01-21 Bauer Spezialtiefbau Gmbh, 8898 Schrobenhausen, De
ES2533573T3 (es) * 2012-01-31 2015-04-13 Bauer Spezialtiefbau Gmbh Procedimiento y disposición para la elaboración de un elemento de muro pantalla
DE102018131226A1 (de) * 2018-12-06 2020-06-10 Liebherr-Werk Nenzing Gmbh Spezialtiefbaumaschine, insbesondere Schlitzwandfräse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162314A1 (de) * 1971-05-13 1972-11-23 Tone Boring Co. Ltd., Tokio Erdbohrverfahren und Erdbohrmaschine
EP0305658A1 (fr) * 1987-08-28 1989-03-08 Bauer Spezialtiefbau GmbH Fraise pour voiles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162314A1 (de) * 1971-05-13 1972-11-23 Tone Boring Co. Ltd., Tokio Erdbohrverfahren und Erdbohrmaschine
EP0305658A1 (fr) * 1987-08-28 1989-03-08 Bauer Spezialtiefbau GmbH Fraise pour voiles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792342A1 (fr) * 1999-04-16 2000-10-20 Spie Fondations Procede et dispositif de positionnement de poteaux prefondes
EP1529924A1 (fr) * 2003-11-04 2005-05-11 BAUER Maschinen GmbH Groupe de transmission pressurisé et méthode de contrôle de la pression dans ledit groupe
EP1666671A1 (fr) * 2004-12-03 2006-06-07 BAUER Maschinen GmbH Fraise pour paroi moulée
US7363734B2 (en) 2004-12-03 2008-04-29 Bauer Maschinen Gmbh Lubricated trench wall cutter with remote lubricant inlet port
CN107083737A (zh) * 2017-06-19 2017-08-22 侯忠备 一种铣刨机浮动收料装置
WO2020173788A1 (fr) * 2019-02-27 2020-09-03 Liebherr-Components Biberach Gmbh Dispositif d'entraînement pour une fraise de rideau souterrain
CN113518842A (zh) * 2019-02-27 2021-10-19 利勃海尔比伯拉赫零部件有限公司 用于沟槽壁切割机的驱动装置
CN113518842B (zh) * 2019-02-27 2023-03-21 利勃海尔比伯拉赫零部件有限公司 用于沟槽壁切割机的驱动装置
EP4194612A1 (fr) * 2019-02-27 2023-06-14 Liebherr-Components Biberach GmbH Carter d'entraînement et/ou de transmission pour l'entraînement d'une fraise pour parois moulées
BE1027388B1 (de) * 2019-06-13 2021-02-02 Changsha Inst Mining Res Co Ltd Abbaukopf zum abbau von kobaltreicher tiefseekruste

Also Published As

Publication number Publication date
TW205017B (fr) 1993-05-01
JPH06316932A (ja) 1994-11-15
ATE110819T1 (de) 1994-09-15
DE59200433D1 (de) 1994-10-06
JP2598204B2 (ja) 1997-04-09
KR930000791A (ko) 1993-01-15
KR960004272B1 (ko) 1996-03-30
DE9107187U1 (de) 1991-07-25
EP0518293B1 (fr) 1994-08-31

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