EP0518293B1 - 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
EP0518293B1
EP0518293B1 EP92109755A EP92109755A EP0518293B1 EP 0518293 B1 EP0518293 B1 EP 0518293B1 EP 92109755 A EP92109755 A EP 92109755A EP 92109755 A EP92109755 A EP 92109755A EP 0518293 B1 EP0518293 B1 EP 0518293B1
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EP
European Patent Office
Prior art keywords
piston
oil reservoir
pressure
bearing seals
compression spring
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.)
Expired - Lifetime
Application number
EP92109755A
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German (de)
English (en)
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EP0518293A1 (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
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Filing date
Publication date
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Publication of EP0518293A1 publication Critical patent/EP0518293A1/fr
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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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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.
  • 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 supporting 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.
  • Such a pressure compensation device is known from DE-A-2162314.
  • 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, that the oil reservoir and the buffer space are connected to one another via a longitudinally displaceable piston, and that 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 bush is provided at its free end with a bottom on which the associated end face of the piston bears 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 denoted 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.
  • FIG. 2 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 pressure change.
  • a piston displacement is triggered in 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 consists of 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 for supporting the compression spring 30 is formed on the piston 19.
  • 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.

Claims (5)

  1. Châssis porte-fraise pour une fraise de flanc de fente, équipé de garnitures d'étanchéité de paliers lubrifiées par l'huile pour les fraises, et d'un dispositif hydraulique réglé d'équilibrage de la pression pour les garnitures d'étanchéité de paliers, caractérisé en ce qu'il est prévu un réservoir d'huile (17), résistant à la pression, relié aux garnitures d'étanchéité de paliers par des conduites, en ce qu'il est prévu en outre une chambre tampon (18) ouverte vers le bas, remplie d'air, exposée à la pression extérieure, agencée à la verticale au-dessous du réservoir d'huile (17); en ce que le réservoir d'huile (17) et la chambre tampon (18) sont reliés l'un a l'autre par un piston (19) mobile en translation longitudinale ; et en ce que le piston (19) est précontraint en direction du réservoir d'huile (17) au moyen d'un ressort de compression (30).
  2. Châssis porte-fraise selon la revendication 1, caractérisé en ce que le ressort de compression (30) est constitue par un ressort hélicoïdal qui est monté sur le Piston (19) et qui prend appui, d'un côté, sur une bride (31) Portée par le boîtier (20) du piston et, de l'autre côté, contre un épaulement (32) prévu sur le piston (19).
  3. Châssis porte-fraise selon la revendication 1, ou 2, caractérisé en ce que le piston (19) est muni d'un fourreau (33) sur son côté dirigé vers le réservoir d'huile (17), et en ce que le ressort de compression (30) est interposé entre le piston (19) et le fourreau (33).
  4. Châssis porte-fraise selon la revendication 3, caractérisé en ce que le fourreau (33) est muni, à son extrémité libre, d'un fond (34) contre lequel la face frontale correspondante du piston (19) est appuyée de l'intérieur.
  5. Châssis porte-fraise selon une des revendications précédentes, caractérisé en ce que le piston (19) est creux.
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 DE9107187U1 (fr) 1991-06-11 1991-06-11
DE9107187U 1991-06-11

Publications (2)

Publication Number Publication Date
EP0518293A1 EP0518293A1 (fr) 1992-12-16
EP0518293B1 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (8)

* 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
FR2792342B1 (fr) * 1999-04-16 2001-08-17 Spie Fond S Procede et dispositif de positionnement de poteaux prefondes
EP1666671B1 (fr) * 2004-12-03 2015-11-04 BAUER Maschinen GmbH Fraise pour paroi moulée
PL2623677T3 (pl) * 2012-01-31 2015-04-30 Bauer Spezialtiefbau Sposób i układ do tworzenia elementu ściennego wykopu
CN107083737A (zh) * 2017-06-19 2017-08-22 侯忠备 一种铣刨机浮动收料装置
DE102018131226A1 (de) * 2018-12-06 2020-06-10 Liebherr-Werk Nenzing Gmbh Spezialtiefbaumaschine, insbesondere Schlitzwandfräse
DE202019102477U1 (de) * 2019-02-27 2020-06-03 Liebherr-Components Biberach Gmbh Antriebseinrichtung für eine Schlitzwandfräse
BE1027388B9 (de) * 2019-06-13 2021-04-26 Changsha Inst Mining Res Co Ltd Abbaukopf zum abbau von kobaltreicher tiefseekruste

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5117201B1 (fr) * 1971-05-13 1976-06-01
DE3728866A1 (de) * 1987-08-28 1989-03-16 Bauer Spezialtiefbau Schlitzwandfraese

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US7789201B2 (en) 2003-11-04 2010-09-07 Bauer Maschinen Gmbh Gear unit and method for controlling an internal pressure in the gear unit

Also Published As

Publication number Publication date
EP0518293A1 (fr) 1992-12-16
JP2598204B2 (ja) 1997-04-09
TW205017B (fr) 1993-05-01
DE9107187U1 (fr) 1991-07-25
KR930000791A (ko) 1993-01-15
DE59200433D1 (de) 1994-10-06
KR960004272B1 (ko) 1996-03-30
JPH06316932A (ja) 1994-11-15
ATE110819T1 (de) 1994-09-15

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