EP2707628A1 - Système d'étanchéité - Google Patents

Système d'étanchéité

Info

Publication number
EP2707628A1
EP2707628A1 EP12720482.4A EP12720482A EP2707628A1 EP 2707628 A1 EP2707628 A1 EP 2707628A1 EP 12720482 A EP12720482 A EP 12720482A EP 2707628 A1 EP2707628 A1 EP 2707628A1
Authority
EP
European Patent Office
Prior art keywords
shaft
coating
sealing element
arrangement according
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.)
Withdrawn
Application number
EP12720482.4A
Other languages
German (de)
English (en)
Inventor
Rüdiger Franke
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.)
Rheinfelden Alloys GmbH and Co KG
Original Assignee
Rheinfelden Alloys GmbH and Co KG
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 Rheinfelden Alloys GmbH and Co KG filed Critical Rheinfelden Alloys GmbH and Co KG
Priority to EP12720482.4A priority Critical patent/EP2707628A1/fr
Publication of EP2707628A1 publication Critical patent/EP2707628A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces

Definitions

  • the invention relates to an arrangement for sealing a container arranged in a container filled with a liquid melt of aluminum or an aluminum alloy, passing through an opening in a wall of the container and rotating about a shaft axis and / or reciprocating in the direction of the shaft axis Shaft, with at least one annular sealing element enclosing the shaft.
  • the invention has for its object to seal a standing in contact with a liquid melt of aluminum or aluminum alloy and rotating about a shaft axis and / or in the direction of the shaft axis reciprocating shaft.
  • the at least one sealing element consists of a carbon, a ceramic or a metallic material and is located outside the container and the shaft in the U mschliessungs Scheme of at least one sealing element with a Ü coating is provided of a carbon, a ceramic or a metallic material, wherein the wear resistance of the coating on the shaft is equal to or higher than the wear resistance of the at least one sealing element.
  • the coating may be a coating applied to the shaft.
  • a preferred coating consists of a hollow cylindrical part fixed on the shaft.
  • the sealing elements are expediently arranged in a sealing housing fixed relative to the shaft.
  • the sealing elements in the housing with the coating applied to the shaft or with the hollow-cylindrical part fixed on the shaft preferably have a transition fit or a slight interference fit at an operating temperature of about 550 ° C. to 650 ° C.
  • the sealing elements preferably consist of graphite, a diamond-like carbon (DLC, diamond-like carbon), zirconium oxide, aluminum titanate, boron nitride, tungsten or a mixture of at least two of the abovementioned materials.
  • the coating applied to the shaft or the hollow cylindrical part fixed on the shaft preferably consists of a diamond-like carbon (DLC, diamond-like carbon), zirconium oxide, aluminum titanate, silicon nitride, boron nitride, tungsten or a mixture of at least two of the abovementioned materials.
  • DLC diamond-like carbon
  • zirconium oxide zirconium oxide
  • aluminum titanate aluminum titanate
  • silicon nitride silicon nitride
  • boron nitride tungsten or a mixture of at least two of the abovementioned materials.
  • the sealing elements may be formed as a closed ring or sleeve, as a split ring or as a segmented ring, in particular a ring consisting of two half shells.
  • the shaft is preferably made of a steel material and the coating applied to the shaft or the hollow cylindrical part fixed on the shaft has a smaller thermal expansion coefficient than the steel material of the shaft.
  • at least one gas supply line for supplying inert gas is arranged in the sealing housing in a sealing gap formed between the sealing elements and the coating applied to the shaft or the hollow cylindrical part defined on the shaft.
  • an annular sealing member has an outer circumferential groove and an inner circumferential groove, and the grooves are interconnected by radially disposed channels.
  • FIG. 1 shows a longitudinal section through a first embodiment of an arrangement with sealing elements for sealing a wall penetrating a wall of a shaft
  • FIG. 2 shows the plan view in the axial direction of a first embodiment of a sealing element
  • FIG 3 shows the plan view in the axial direction of a second embodiment of a sealing element.
  • FIG. 4 shows the plan view in the axial direction of a third embodiment of a sealing element.
  • 5 shows a longitudinal section through a second embodiment of an arrangement with sealing elements for sealing a shaft penetrating a wall of a container;
  • FIG. 6 shows a cross section through the shaft of Figure 5 in the region of the sealing elements ..;
  • Fig. 7 is a longitudinal section through a third embodiment of an arrangement with
  • Sealing elements for sealing a shaft penetrating a wall of a container
  • FIG. 8 shows a longitudinal section through a fourth embodiment of an arrangement with a sealing element for sealing a shaft penetrating a wall of a container.
  • a first embodiment of a sealing arrangement shown in FIG. 1 shows a partial region of a container 1 2 filled with a liquid melt 1 0 made of aluminum or an aluminum alloy with a cylindrical inner wall 1 4 and a shaft 1 6 arranged concentrically with the inner wall 1 4 in the container 1 2 a wave axis x.
  • the shaft 1 6 passes through an opening 20 at a right angle to the shaft axis x arranged end wall 1 8 of the container 1 2 to the outside, wherein in the end wall 1 8 between the edge of the opening 20 and the lateral surface 22 of the shaft 1 6 for unobstructed rotation and Axialverschiebles the shaft 1 6 an annular gap 24 as a radial clearance for the shaft 1 6 remains.
  • a seal housing 26 On the outside of the container 1 2 is a seal housing 26 with a shaft 1 6 enclosing the housing part 28 with concentric to the shaft axis x lying cylindrical shear inner jacket surface 30 via a first mounting flange 32 on the end wall 1 8 of the container 1 2 flanged.
  • the seal housing 26 is connected via a second mounting flange 34 with a connecting flange 36 for attachment of a drive device, not shown in the drawing for the rotation and the axial H-reciprocation of the shaft 1 6.
  • the connecting flange 36 encloses the shaft 1 6 with a cylindrical tubular extension 38, leaving an annular gap 40 to maintain a radial clearance for the shaft 1 6.
  • the cylindrical outer surface 42 of the tubular extension 38 extends into the housing part 28 and is cylindrical Inner circumferential surface 30 of the housing part 28 slidably.
  • the housing part 28 of the seal housing 26 encloses ring-shaped sealing elements 44, which in turn enclose the shaft 1 6.
  • ring-shaped sealing elements 44 are arranged adjacent to each other on the shaft 1 6.
  • a first of the four sealing elements 44 abuts the end face 18.
  • an adjustable spring force the front side of the last of the four sealing elements 44 non-positively.
  • the sealing elements can be used as a closed ring 50 or sleeve (FIG. 2), as a split ring 52 (FIG. 3) or as a segmented, e.g. B. of two half-shells (54) existing ring (Fig. 4) be executed.
  • the number of sealing elements 44 can be chosen arbitrarily and is generally between about 3 and 10.
  • the sealing elements 44 extend within the housing part 28 over an axial length L 1.
  • the region of the lateral surface 22 of the shaft 16 which bears against the sealing elements 44 is over an axial length L2, which increases substantially to the length L 1 the axial displacement component of the shaft 1 6, which during operation shifts back and forth, corresponds to a coating 60.
  • the material for the coating 60 of the shaft 16 in the region of the seal is chosen such that the wear resistance of the coating 60 is equal to or higher than the wear resistance of the sealing elements 44.
  • Suitable coatings for the shaft 16 in the sealing region are carbon, ceramic or metallic coatings. Examples of coating materials include diamond-like carbon (DLC), zirconium oxide, aluminum titanate, boron nitride, silicon nitride, and tungsten.
  • Suitable materials for the sealing elements 44 are carbon in the form of graphite, ceramic materials or metals, it being important to ensure that the wear resistance of the sealing elements 44 is equal to or less than the wear resistance of the coating 60 of the shaft 1 6 in the sealing area.
  • the coating has a coefficient of thermal expansion similar to that of the steel material of the shaft 1 6. In this way, the coating can be prevented from flaking off when heated to operating temperature.
  • a smooth formation of the coating 60 on the shaft 1 6 is also preferred. No or only slight wetting of the coating 60 and the sealing elements 44 by liquid molten aluminum or an aluminum alloy and a chemical resistance of the material for the coating 60 of the Shaft 1 6 and the material for the sealing elements 44 up to a temperature of about 800 ° C.
  • the sealing elements 44 have a compared to the steel material of the shaft 1 6 and other components a similar, but lower pulpausdehn on.
  • the dimensions of the sealing elements 44 are chosen so that a transitional fit or a slight interference fit with the shaft is established at the operating temperature.
  • a hollow-cylindrical part 62 is arranged on the shaft 16.
  • On the inner circumferential surface of the hollow cylindrical part 62 extends a plurality of parallel longitudinal grooves 64 in the direction of the shaft axis x and on the shaft 1 6 a plurality of parallel longitudinal teeth 66 in the direction of the shaft axis x extending arranged (Fig. 5).
  • Suitable materials for the hollow cylindrical part 62 of the shaft 1 6 in the region of the seal are diamond-like carbon (DLC, diamond like carbon) and ceramic materials, in particular boron nitride (BN) and silicon nitride (Si 3 N 4 ).
  • DLC diamond-like carbon
  • BN boron nitride
  • Si 3 N 4 silicon nitride
  • a particularly suitable sealing arrangement consists of a hollow cylindrical portion 62 of silicon nitride (Si 3 N 4 ) with a compared to boron nitride (BN) higher wear resistance and four sealing elements 44 in the form of rings 50 of boron nitride (BN) and graphite (C) in the arrangement BN -CC-BN, BN-C-BN-C or BN-BN-CC, wherein the with the molten metal in direct contact first ring each consists of BN.
  • the sealing arrangement shown in FIG. 7 differs from the sealing arrangement according to FIG. 5 by one or more gas supply lines 29 arranged in the housing part 26 for supplying inert gas into the sealing gap formed between the lateral surface 63 of the hollow cylindrical part 62 and the inner lateral surface 3 1 of the sealing elements 44 ,
  • the sealing arrangement shown in Fig. 8 corresponds to the seal arrangement according to FIG. 7, wherein instead of four sealing elements 44, a single sealing element 45 is present.
  • the seal member 45 has an outer circumferential groove 46 and an inner circumferential groove 48.
  • the two grooves 46, 48 are connected by radially arranged channels 47 so that through the gas supply lines 29 supplied inert gas, the sealing element 45 flows through in the radial direction and in the sealing gap formed between the lateral surface 63 of the hollow cylindrical portion 62 and the inner circumferential surface 3 1 of the sealing element 45 can hang.
  • the gas flow through the gas supply lines 29 is adjusted so that in the Zeichn by an arrow through the inert gas in between the lateral surface 63 of the hollow cylindrical portion 62 and the inner circumferential surface 3 1 of the sealing elements 44 and the sealing member 45 formed sealing gap
  • a illustrated gas pressure is built up, which counteracts the penetration of liquid molten metal 1 0 in the sealing gap.
  • a suitable inert gas is z. Nitrogen (N 2 ) or argon (Ar).
  • a sealing arrangement described above is suitable, for example, for the operation of a M isch- and kneading machine for the production of semi-solid aluminum alloys, as z. B.
  • Such a mixing and kneading machine has a container in the form of a housing in which a worm shaft rotating about a longitudinal axis and translatingly reciprocating in the longitudinal axis is arranged.
  • a drive shaft arranged concentrically with respect to the worm shaft is guided out of the container at the front end and operatively connected to a drive unit for carrying out a rotational movement of the worm shaft and a device cooperating with the worm shaft for simultaneously carrying out the translational movement of the worm shaft in the shaft axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Mechanical Sealing (AREA)

Abstract

L'invention concerné un système destiné à faire l'étanchéité autour d'un arbre (16) qui est disposé dans un récipient (12) rempli d'une masse fondue (10) liquide à base d'aluminium ou d'un alliage d'aluminium et qui traverse une paroi (18) du récipient (12) à travers un orifice (20) et qui effectue un mouvement de rotation autour d'un axe d'arbre (x) et/ou un mouvement de va-et-vient dans le sens de l'axe d'arbre (x), l'arbre (16) étant entouré d'au moins un élément d'étanchéité (44) annulaire. Ledit au moins un élément d'étanchéité (44) est constitué d'un carbone, d'un matériau céramique ou d'un matériau métallique et est disposé en dehors du récipient (12), et l'arbre (16) est pourvu, dans la zone où il est entouré dudit au moins un élément d'étanchéité (44), d'un revêtement (60) constitué d'un carbone, d'un matériau céramique ou d'un matériau métallique, la résistance à l'usure du revêtement (60) sur l'arbre (16) étant supérieure ou égale à la résistance à l'usure dudit au moins un élément d'étanchéité (44).
EP12720482.4A 2011-05-11 2012-05-09 Système d'étanchéité Withdrawn EP2707628A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12720482.4A EP2707628A1 (fr) 2011-05-11 2012-05-09 Système d'étanchéité

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11165711A EP2522885A1 (fr) 2011-05-11 2011-05-11 Agencement d'étanchéification
EP12720482.4A EP2707628A1 (fr) 2011-05-11 2012-05-09 Système d'étanchéité
PCT/EP2012/058581 WO2012152846A1 (fr) 2011-05-11 2012-05-09 Système d'étanchéité

Publications (1)

Publication Number Publication Date
EP2707628A1 true EP2707628A1 (fr) 2014-03-19

Family

ID=44675354

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11165711A Withdrawn EP2522885A1 (fr) 2011-05-11 2011-05-11 Agencement d'étanchéification
EP12720482.4A Withdrawn EP2707628A1 (fr) 2011-05-11 2012-05-09 Système d'étanchéité

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11165711A Withdrawn EP2522885A1 (fr) 2011-05-11 2011-05-11 Agencement d'étanchéification

Country Status (9)

Country Link
US (1) US20140117627A1 (fr)
EP (2) EP2522885A1 (fr)
JP (1) JP2014514517A (fr)
CN (1) CN103518089A (fr)
BR (1) BR112013028564A2 (fr)
CA (1) CA2832200A1 (fr)
MX (1) MX2013012965A (fr)
RU (1) RU2013153500A (fr)
WO (1) WO2012152846A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557311B (zh) * 2013-11-22 2017-01-11 湖南南方宇航高精传动有限公司 一种用于在轴上密封端盖的密封装置
JP6681568B2 (ja) * 2015-04-01 2020-04-15 パナソニックＩｐマネジメント株式会社 加熱反応容器および反応方法
EP3093365B1 (fr) * 2015-05-14 2019-07-03 Microtecnica S.r.l. Joints rotatifs
KR101755884B1 (ko) * 2015-11-13 2017-07-07 현대자동차주식회사 차량용 댐퍼 풀리 조립체
US11619237B2 (en) * 2020-02-14 2023-04-04 Raytheon Technologies Corporation Carbon seal assembly
US11692449B2 (en) * 2020-02-14 2023-07-04 Raytheon Technologies Corporation Carbon seal assembly
CN115280043A (zh) 2020-03-31 2022-11-01 Nok株式会社 密封结构

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
CH278575A (de) 1949-11-04 1951-10-31 List Heinz Misch- und Knetmaschine.
US3348859A (en) * 1965-05-24 1967-10-24 David H Melbye Towing device embodying two trailers
US3836158A (en) * 1973-03-07 1974-09-17 Gulf Oil Corp Packing ring
JP2648816B2 (ja) * 1988-05-10 1997-09-03 イーグル工業株式会社 円筒面シール
JPH0626577A (ja) * 1992-07-06 1994-02-01 Mitsubishi Heavy Ind Ltd 軸封装置
DE4305117A1 (de) * 1993-02-19 1994-08-25 Espey Gustav Gmbh & Co Kg Hochdruckdichtsystem für umlaufende Wellen
JP2820234B2 (ja) * 1993-06-16 1998-11-05 小松ゼノア 株式会社 破砕ポンプ
CN2703167Y (zh) * 2004-04-08 2005-06-01 陕西鼓风机（集团）有限公司 一种用于高炉煤气能量回收透平装置轴端的碳环密封
EP1853746B1 (fr) * 2005-03-02 2012-12-19 Ebara Corporation Utilisation d'une structure d'étanchéité ou de support à revêtement de diamant
JP2006322342A (ja) * 2005-05-17 2006-11-30 Toshiba Corp 水力機械の軸封装置
PL2393619T3 (pl) 2010-03-24 2013-09-30 Rheinfelden Alloys Gmbh & Co Kg Metoda wytwarzania elementów odlewanych ciśnieniowo

Non-Patent Citations (1)

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Title
See references of WO2012152846A1 *

Also Published As

Publication number Publication date
BR112013028564A2 (pt) 2017-01-17
CN103518089A (zh) 2014-01-15
US20140117627A1 (en) 2014-05-01
RU2013153500A (ru) 2015-06-20
MX2013012965A (es) 2014-03-12
JP2014514517A (ja) 2014-06-19
EP2522885A1 (fr) 2012-11-14
CA2832200A1 (fr) 2012-11-15
WO2012152846A1 (fr) 2012-11-15

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