EP1189004B1 - Rouleau de four que l'on peut refroidir à l'eau - Google Patents

Rouleau de four que l'on peut refroidir à l'eau Download PDF

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Publication number
EP1189004B1
EP1189004B1 EP01119488A EP01119488A EP1189004B1 EP 1189004 B1 EP1189004 B1 EP 1189004B1 EP 01119488 A EP01119488 A EP 01119488A EP 01119488 A EP01119488 A EP 01119488A EP 1189004 B1 EP1189004 B1 EP 1189004B1
Authority
EP
European Patent Office
Prior art keywords
shaft
furnace
furnace roller
roller according
carrier 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.)
Expired - Lifetime
Application number
EP01119488A
Other languages
German (de)
English (en)
Other versions
EP1189004A1 (fr
Inventor
Jürgen Dr. Lemke
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1189004A1 publication Critical patent/EP1189004A1/fr
Application granted granted Critical
Publication of EP1189004B1 publication Critical patent/EP1189004B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails

Definitions

  • the invention relates to a water-coolable oven roll for conveying cargo, eg. Continuous casting of a continuous casting, by a roller hearth warming furnace, comprising a rotatable, outside the furnace mounted shaft, in particular with internal coolant channels, and arranged on the shaft by means of a receiving bore , a conveying plane forming carrier rings for the cargo.
  • cargo eg. Continuous casting of a continuous casting
  • roller hearth warming furnace comprising a rotatable, outside the furnace mounted shaft, in particular with internal coolant channels, and arranged on the shaft by means of a receiving bore , a conveying plane forming carrier rings for the cargo.
  • roller hearth furnaces of continuous casting plants for example, thin slabs are preheated to rolling temperature.
  • the promotion of the rolling stock or slabs by roller hearth furnaces is done by furnace rollers in different versions.
  • the roller hearth furnace is usually in line between the casting machine and rolling train and is characterized by its function as a heating, compensation and buffer zone. Due to the types of loading of furnace rolls during furnace operation, the existing in the prior art types of furnaces have different lengths of life.
  • the spatial dimensions of such a furnace and its heat-applying devices, for example, burners, are designed such that the furnace outlet Thin slabs have the required rolling temperature.
  • the oven length allows the inclusion of several thin slabs, which are separated after casting - with different casting speeds - from the cast strand.
  • the transport of such thin slabs takes place within the furnace via driven furnace rollers. These are arranged in a certain kiln height on a level, the transport height, at predetermined intervals from each other.
  • the dimensions of the rollers are - relatively speaking - characterized in that the diameter of the support rings and the shafts is small compared to the length of the rollers.
  • the transport rollers in the roller hearth furnace can be equipped with water cooling or even be arranged without a cooling device as so-called dry rollers.
  • the usual construction of a water-cooled roller comprises a plurality of support rings at an axial distance on the water-cooled shaft.
  • the latter is insulated between the support rings with refractory material, this insulating layer is almost as thick as the outer diameter of the support rings.
  • the shaft is stored outside the furnace and provided there with connections for internal shaft cooling.
  • This internal cooling is achieved by a tube with a circular cross section, which is arranged concentrically in the shaft. Through this cooling water flows, the tube passes through to the opposite side of the furnace and flows on the other side into the annular gap between the tube and shaft, flows through it and finally leaves the shaft on the inflow side.
  • internals can be widely used Are located, which serve to fix the tube in the radial position and to increase the flow velocity of the water in the annular gap.
  • the support rings applied to the roller axle are usually made of cast material and are made of high temperature nickel or cobalt base alloys.
  • the shaft is preferably made of heat-resistant steels.
  • the water-cooled rolls are used primarily but not exclusively in the heating zone of a roller hearth furnace. They are equipped in the transport direction alternately with a different number of support rings. Usually, the waves are equipped with four or five support rings, usually alternately.
  • the support rings are arranged in the transport direction of a role with four support rings to the role with five support rings on different lines. For the role with four support rings is that in each case two support rings are located on a shaft half, whereas on the role with five support rings one in the middle of the roll, the others are arranged offset relative to those on the role with four support rings outwards.
  • the support rings on the shaft are usually secured by welds against axial displacement.
  • the torque can be achieved via known shaft-hub connections, such as e.g. Passing feathers or be transmitted via welds.
  • a major reason for the failure of a furnace roll is the damage or destruction of the roll insulation, because just because the welds are directly exposed to the high furnace temperatures.
  • the document DE 40 22 768 describes roller table rollers for conveying and guiding a workpiece by a heating oven comprising shafts whose ends are rotatably supported in bearings. These form wheel-like support devices in the longitudinal direction of the shaft at a distance from each other on the outer periphery are fixed, wherein the radially outermost surfaces of the wheel-like support devices serve as a support for the workpiece, while this is passed through the heating oven.
  • the wheel-like support devices consist of a hub, which communicates via ribs with a rim-like, continuous wreath. The ribs are separated by open spaces to reduce their cross-sectional area and thereby impede heat flow from the rim to the hub.
  • the hub consists of a plurality of angularly spaced cores comprising a nose-like portion and a head portion.
  • a weld only connects the nose-like portions to the shaft so that the head portions may shift with respect to the shaft due to differential expansion and flexing.
  • Means for thermally insulating the shaft are essentially the portions between adjacent wheel-like support devices and the walls of the furnace. The means for rotating the shaft are located outside the furnace.
  • the post-published European patent application EP 1 134 531 A1 discloses a disk roll for roller hearth furnaces for heating Wärmgut.
  • a rotatable, internally cooled support tube On a rotatable, internally cooled support tube a plurality of axially spaced from each other on the support tube arranged support rings is arranged. These sit on two lateral support elements and are detachably connected thereto.
  • the support elements in the circumferential direction on rounded ridges which are distributed at a distance from each other on the circumference of the support elements and engage in correspondingly shaped recesses in the support rings.
  • the document EP 0 633 815 B1 describes a furnace roll for supporting a heated workpiece having a rotatable shaft for receiving a coolant, a number of axially spaced support rings being mounted thereon.
  • a thermally resistant insulating agent that surrounds the Axially mounted shaft extends axially between the support rings, wherein the insulating means has an outer surface which extends radially over at least a considerable part of the radius of a pair of support rings.
  • the insulating means is secured in the shaft by anchoring means with protruding terminal ends disposed radially inwardly of the outer surface of the insulating means.
  • the spacer is made of a metal which allows for the pourable insulating a voltage drop in the thermal expansion of the anchoring means and deflection of the furnace roller.
  • the document DE 38 07 240 C1 describes a roller hearth furnace for heating slabs, blocks, billets, sheets and the like warm goods
  • the furnace chamber is formed with a longitudinally extending roller table.
  • the oven has a hot upper oven room, and a sub-furnace room, and in between a hearth with recesses.
  • the roller table is stored substantially in the lower furnace space below the hearth and protrudes only with small sections of its furnace rollers through the recesses of the hearth floor above its level. At least the projecting into the hot zone roller sections with their treads on which the warm goods is transported, made of particularly heat-resistant material which, composed of segments into a ring, the furnace rollers encase on the peripheral surface.
  • Cleaning devices free the running surfaces of the furnace rollers from scale caking.
  • the present invention seeks to provide means for further improvement of the heat transfer between support rings and shaft, thereby increasing the heat dissipation from the support rings to the shaft and to extend the availability of the support rings with reduced growth of scale and at the same time to ensure a reliable, secure torque transmission between support rings and shaft and to achieve greater flexibility in their arrangement with reduced effort when applying the support rings on the shaft.
  • a coolable furnace roller specified in the preamble of claim 1 with the invention that for the production of an optimal metallic contact for a possible unhindered heat transfer between the support ring and shaft, the contact surfaces on the inner diameter of the receiving bore of the support ring and / or on Outer diameter of the shaft in the form of a polygonal profile with mating surfaces of approximately constant diameter are designed as so-called weak equal thickness.
  • the small deviation of the direct dodge from the ideal round, the circular shape causes an automatic tightening of the support ring seat on the shaft during torque transmission.
  • the contact surface of both the support ring, and the shaft is plastically and elastically deformed, which has a significant increase in the contact surfaces result, and as a further advantage results in a significantly improved heat conduction or a significantly improved heat transfer between the support ring and shaft.
  • the inner diameter of the support ring which becomes larger as a result of thermal expansion, is also compensated by the relative rotation with respect to the shaft.
  • the surface temperature of the furnace roll is reduced in the design according to the invention due to the increased contact surface of the support ring and shaft and more intimate metallic contact and increases their availability, and reduces the risk of pick-up formation on the surface.
  • the structure of the furnace roller is extremely flexible and can be optimally adapted to the respective stresses.
  • the heat transfer can be further improved.
  • Fig. 1 shows the support ring 7 with cut shaft 3 in the assembled starting state with snug fit 6 with a slight deviation of a polygonal profile of the circular shape of a few millimeters. It is a so-called weak "equal thickness”.
  • the shaft 3 has in its tubular cavity a central coolant channel 4, and a peripheral coolant ring channel 5.
  • Fig. 2 shows the support ring 7 with the cut shaft 3 in the operating state under load by torsional stress, as well as in the heated state.
  • the preferred embodiment of the same thickness provides that the deviation of the mating surfaces 6, 6 'from the ideal round, the circular shape, a self-locking in a torque transmission between the support ring 7 and shaft 3 corresponds.
  • This deviation of the mating surfaces 6, 6 'from the ideal round can - depending on the design and stress in mechanical and / or thermal nature - be about 1 to 5 mm.
  • the support ring 7 is about Gleichdick-fitting tolerances 6, 6 'purely mechanically pushed onto the shaft 3 and jammed by relative rotation with the shaft 3, wherein the attachment of the support ring 7 on the shaft 3 according to the principle of surface enlargement by deformation of the contact surfaces 6, 6 'takes place.
  • At least the deviation of the mating surfaces 6, 6 'from Idealrund should be slightly larger than the thermal expansion of the inner diameter of the receiving bore 1 of the support ring 7 during operation of the furnace.
  • This receiving bore 1 forms the inner contact surface 6 with the mating surface 6 'of the shaft third
  • the support ring 7 may be one or more pieces, or be made of individual rings.
  • Fig. 3 shows an embodiment of the invention, according to which formed as a polygon profile with constant diameter equal thickness so weak fitting tolerances between the contact surfaces on the inner diameter of the support ring 7 and the outer diameter of the shaft 3, that a rotation of support ring 7 and shaft 3 due to the transfer of a Torque leads to a comparatively large elastic-plastic deformation.

Claims (8)

  1. Rouleau de four refroidi à l'eau pour le convoyage d'un produit transporté, par exemple un matériau d'extrusion dans une installation d'extrusion, à travers un four de chauffage avec foyer à rouleaux, comprenant un arbre (3) susceptible d'être entraîné en rotation et supporté à l'extérieur du four, en particulier avec des canaux (4, 5) pour agent de refroidissement situés à l'intérieur, et avec des bagues portantes (7) agencées sur l'arbre (3) au moyen d'un perçage de réception (1) et formant un plan de convoyage,
    caractérisé en ce que
    les surfaces de contact au niveau du diamètre intérieur du perçage de réception (1) de la bague portante (7) et/ou au niveau du diamètre extérieur de l'arbre (3) sont réalisées sous la forme d'un profil polygonal avec des surfaces d'ajustage (6, 6') de diamètre approximativement constant à la manière d'un "orbiforme faible" ("Gleichdick").
  2. Rouleau de four selon la revendication 1,
    caractérisé en ce que la déviation des surfaces d'ajustage (6, 6') par rapport à la forme idéale ronde ou circulaire correspond à un autocoincement lors de la transmission de couples de rotation entre la bague portante (7) et l'arbre (3).
  3. Rouleau de four selon la revendication 1 ou 2,
    caractérisé en ce que la déviation des surfaces d'ajustage (6, 6') par rapport à la forme idéale ronde est d'environ 4 à 5 %.
  4. Rouleau de four selon l'une ou plusieurs des revendications 1 à 3,
    caractérisé en ce que la déviation des surfaces d'ajustage (6, 6') par rapport à la forme idéale ronde correspond au moins à l'amplitude de la dilatation thermique du diamètre intérieur du perçage de réception (1) de la bague portante (7) lors du fonctionnement du four.
  5. Rouleau de four selon l'une ou plusieurs des revendications 1 à 4,
    caractérisé en ce que le contact métallique est établi via l'orbiforme soit sur la totalité de la largeur du rouleau de four soit sur des zones partielles de celui-ci.
  6. Rouleau de four selon l'une ou plusieurs des revendications 1 à 5,
    caractérisé en ce que la bague portante (7) est réalisée en une ou plusieurs pièces, ou respectivement à partir de bagues individuelles.
  7. Rouleau de four selon l'une ou plusieurs des revendications 1 à 6,
    caractérisé en ce que des rondelles minces sont interposées entre la bague portante (7) et l'arbre (3), en particulier lorsque la bague est réalisée en plusieurs pièces, rondelles qui sont constituées par exemple par une feuille d'argent ou une feuille d'un métal réfractaire et présentant une forte conductibilité thermique, comme par exemple CuNiBe.
  8. Rouleau de four selon l'une ou plusieurs des revendications 1 à 7,
    caractérisé en ce que l'orbiforme réalisé comme un profil polygonal avec diamètre constant présente des tolérances d'ajustement si faibles entre les surfaces de contact au niveau du diamètre intérieur des perçages de réception (1) de la bague portante (7) et le diamètre extérieur de l'arbre (3), qu'une rotation de la bague portante (7) et de l'arbre (3) suite à la transmission d'un couple de rotation mène à une déformation élastique-plastique comparativement considérable.
EP01119488A 2000-09-13 2001-08-14 Rouleau de four que l'on peut refroidir à l'eau Expired - Lifetime EP1189004B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10045251A DE10045251A1 (de) 2000-09-13 2000-09-13 Wasserkühlbare Ofenrolle zum Fördern von bspw. Stranggußmaterial-Werkstücken durch einen Rollenherdofen
DE10045251 2000-09-13

Publications (2)

Publication Number Publication Date
EP1189004A1 EP1189004A1 (fr) 2002-03-20
EP1189004B1 true EP1189004B1 (fr) 2006-12-13

Family

ID=7656043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01119488A Expired - Lifetime EP1189004B1 (fr) 2000-09-13 2001-08-14 Rouleau de four que l'on peut refroidir à l'eau

Country Status (5)

Country Link
US (1) US6547557B2 (fr)
EP (1) EP1189004B1 (fr)
JP (1) JP5170924B2 (fr)
AT (1) ATE348307T1 (fr)
DE (2) DE10045251A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108607788A (zh) * 2018-05-20 2018-10-02 苏州锌富化工有限公司 一种滚筒式加热装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB317433A (en) * 1928-08-16 1929-08-16 Int Nickel Co Improvements in or relating to carrier wheel devices
JPS522369B2 (fr) * 1971-08-20 1977-01-21
DE2413270C2 (de) * 1974-03-20 1975-08-21 Ludwig-Ofag-Indugas Industrieofenanlagen Gmbh, 4300 Essen Gekülte Ofentransportrolle
JPS5596236A (en) * 1979-01-12 1980-07-22 Kubota Ltd Preparation of compound roll for continuous casting
JPS5759237Y2 (fr) * 1979-01-20 1982-12-17
JPS6121162Y2 (fr) * 1980-08-11 1986-06-25
US4991276A (en) 1989-07-31 1991-02-12 Bricmanage, Inc. Flexible conveyance and guidance roller for use in metalworking furnace structures
DE4142941A1 (de) * 1991-12-24 1993-07-01 Kabelmetal Ag Verwendung einer aushaertbaren kupferlegierung
US5230618A (en) * 1992-02-24 1993-07-27 Bricmanage, Inc. Insulated furnace roller
US5362230A (en) * 1993-03-24 1994-11-08 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
US5370530A (en) * 1993-03-24 1994-12-06 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
JPH10181835A (ja) * 1996-12-27 1998-07-07 Kubota Corp 分割形タイヤローラ
JP3678899B2 (ja) * 1998-01-29 2005-08-03 株式会社クボタ スラブ搬送用ローラ
DE10012940A1 (de) * 2000-03-16 2001-09-20 Loi Thermprocess Gmbh Scheibenrolle für Rollenherdöfen

Also Published As

Publication number Publication date
US20020048740A1 (en) 2002-04-25
DE50111623D1 (de) 2007-01-25
JP2002172453A (ja) 2002-06-18
ATE348307T1 (de) 2007-01-15
US6547557B2 (en) 2003-04-15
DE10045251A1 (de) 2002-03-21
JP5170924B2 (ja) 2013-03-27
EP1189004A1 (fr) 2002-03-20

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