EP0545172A1 - Joint d'étanchéité pour éléments réfractaires transportant un métal liquide - Google Patents

Joint d'étanchéité pour éléments réfractaires transportant un métal liquide Download PDF

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Publication number
EP0545172A1
EP0545172A1 EP92119780A EP92119780A EP0545172A1 EP 0545172 A1 EP0545172 A1 EP 0545172A1 EP 92119780 A EP92119780 A EP 92119780A EP 92119780 A EP92119780 A EP 92119780A EP 0545172 A1 EP0545172 A1 EP 0545172A1
Authority
EP
European Patent Office
Prior art keywords
gap
fluid
pocket
component
ring
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.)
Withdrawn
Application number
EP92119780A
Other languages
German (de)
English (en)
Inventor
Raimund Brückner
Karl-Heinz Schmitt
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0545172A1 publication Critical patent/EP0545172A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures

Definitions

  • the invention relates to a sealing device for refractory components carrying metallic melt, which are arranged one inside the other and one component of which is rotatable and / or axially displaceable in the other, with at least one pocket open to the gap between the two components, into which a sealing body is inserted, and with a port for introducing a fluid into the gap.
  • Such a device is shown in DE 38 38 903 A1.
  • the body is formed by a radially resilient ceramic ring. Its surface resiliently presses against one of the components. This is to block the gap against melt. This also applies if the width of the gap changes due to different thermal expansions of the two components. There is an inevitable friction between the surface of the ring and one component when the other component moves.
  • the spring washer Since the spring washer is slotted according to DE 38 38 903 A1, despite the overlap of its open ends, it must be expected that the spring washer will not be in full contact with its sealing surface on the associated surface of the component in question at all gap widths occurring, even if its surface itself is made very exactly according to the surface of the component in question, on which the sealing surface of the spring ring rests.
  • the one wear part of a slide closure is itself porous.
  • a depot for an impregnating agent is built into this wearing part. During operation, the pores from the depot are refilled with the impregnating agent in order to delay the wear of the wearing part.
  • DE 40 00 105 C1 describes a slide plate in which a line is integrated which opens into an open channel on the sliding surface of the slide plate. As a result, a lubricant can be supplied to the sliding surface.
  • DE-AS 28 30 199 shows a plate for slide closures.
  • An inner ring is inserted into the plate.
  • the object of the invention is to develop a device of the type mentioned in the introduction so that the sealing of the gap is improved.
  • the above object is achieved in a device of the type mentioned in the introduction in that the body consists of a porous material, that the connection opens into the pocket and that the fluid pressed into the body is distributed as a sealant through the pores of the body over its gap-side surface enters the gap.
  • the fluid is finely distributed in the porous body and forms a homogeneous film in the gap on the gap-side surface of the body and then on this surface.
  • This film prevents penetration of the melt into the gap and in particular prevents the melt from passing through the gap.
  • the film also prevents the melt from freezing in the gap.
  • the sealing film prevents air from getting to the melt.
  • the film also acts as a sliding film. This considerably improves the mobility of the rotor in relation to the stator.
  • the porous body It is also achieved by the porous body that the fluid only reaches the gap distributed in microdroplets, which leads to the desired film formation.
  • the porous body represents a comparatively high flow resistance for the fluid.
  • the pressure of the fluid in the gap is considerably lower than at the connection at which the fluid is introduced into the pocket. This promotes even film formation.
  • the porous body does not have to form a surface rubbing directly on a counter surface. There are therefore no tight tolerances when manufacturing the body.
  • the body does not need to have elastic properties either.
  • the body preferably consists of a porous, refractory ceramic material.
  • the gap-side surface of the body lies flush with the gap-side surface of the component in whose pocket it is inserted. This favors an even film formation.
  • this also supports the achievement of the further advantage of the invention, namely that the body does not lead to their jamming, even with different thermal expansions of the two components. With different thermal expansions of the two components, the width of the gap can change. However, the film then becomes correspondingly thicker or thinner without any difficulties.
  • the fluid is preferably an oil. This is suitable for distributing itself in the pores of the body and for forming the desired sealing and sliding film in the gap.
  • the body is a ring and, accordingly, the pocket is an annular groove.
  • the pocket is an annular groove.
  • the metallurgical vessel has a base 1.
  • a stator 2 is attached to this at right angles to it. This has a passage opening 3 for the melt.
  • a rotationally symmetrical rotor 4 which is provided with a passage opening 5, is mounted in the stator 2.
  • the rotor 4 is rotatable in the stator 2 in the direction of the arrow D and, if appropriate, is axially displaceable in the direction of the arrow V.
  • annular groove 7 open towards the gap 6 is formed.
  • a channel 8 running in the stator 2 opens into the annular groove 7, to which a pressure line for pressing in a fluid, for example an oil, can be connected.
  • a ring 9 made of refractory, porous ceramic material sits in the ring groove 7.
  • the surface 10 of the ring 9 facing the gap 6 is flush with the adjacent surface 11 of the stator 2.
  • the oil pressed into the annular groove 7 is distributed in the ring 9 and forms a film on the surface 10 which fills the gap 6. This is supported by capillary action and adhesion.
  • the film not only lies on the surface 10 of the ring 9, but is also distributed over the adjacent surface 11.
  • the film acts in a sealing manner in such a way that neither melt nor ambient air can enter the gap 6.
  • Oil is supplied continuously or sporadically from the ring 9 to the film. Oil can escape at edge openings 12, 13 of the gap 6. The oil will predominantly emerge at the edge opening 12 open to the ambient air, since at the edge opening 13 open to the melt S or in the area of the passage openings 3, 4, the pressure caused by the melt is greater than the air pressure at the edge opening 12.
  • stator 2 and the rotor 4 extend essentially over the entire length of the base 1, the stator 2 being attached to the base 1 parallel to it.
  • Stator 2 and rotor 4 have an elongated passage channel 15 and 16, respectively.
  • pockets 17 are arranged on its inner circumference, in which refractory porous ceramic bodies 18 are arranged.
  • the pockets 17 are connected to the pressure lines 8 supplying the oil.
  • a continuous film can also be achieved in this embodiment, since the film also spreads automatically in the gap 6 between the pockets 17.
  • the pockets 17 do not have to lie in a radial sectional plane. You can also be axially offset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP92119780A 1991-12-06 1992-11-20 Joint d'étanchéité pour éléments réfractaires transportant un métal liquide Withdrawn EP0545172A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140300 1991-12-06
DE19914140300 DE4140300A1 (de) 1991-12-06 1991-12-06 Dichtungseinrichtung fuer metallische schmelze fuehrende feuerfeste bauteile

Publications (1)

Publication Number Publication Date
EP0545172A1 true EP0545172A1 (fr) 1993-06-09

Family

ID=6446464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119780A Withdrawn EP0545172A1 (fr) 1991-12-06 1992-11-20 Joint d'étanchéité pour éléments réfractaires transportant un métal liquide

Country Status (2)

Country Link
EP (1) EP0545172A1 (fr)
DE (1) DE4140300A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369147A2 (fr) * 1988-11-17 1990-05-23 Didier-Werke Ag Etanchage pour composants réfractaires contenant du métal liquide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369147A2 (fr) * 1988-11-17 1990-05-23 Didier-Werke Ag Etanchage pour composants réfractaires contenant du métal liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 10 (M-446)16. Januar 1986 & JP-A-60 173 350 ( TOSHIBA KK ) 6. September 1985 *

Also Published As

Publication number Publication date
DE4140300A1 (de) 1993-06-09

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