WO2018166957A1 - Rouleau pour four roulant à réchauffer - Google Patents

Rouleau pour four roulant à réchauffer Download PDF

Info

Publication number
WO2018166957A1
WO2018166957A1 PCT/EP2018/056042 EP2018056042W WO2018166957A1 WO 2018166957 A1 WO2018166957 A1 WO 2018166957A1 EP 2018056042 W EP2018056042 W EP 2018056042W WO 2018166957 A1 WO2018166957 A1 WO 2018166957A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
sleeve
roll
kiln according
webs
Prior art date
Application number
PCT/EP2018/056042
Other languages
German (de)
English (en)
Inventor
Hans-Ulrich Dorst
Original Assignee
Saint-Gobain Industriekeramik Rödental 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
Priority claimed from DE102017105774.9A external-priority patent/DE102017105774A1/de
Priority claimed from DE202017101560.2U external-priority patent/DE202017101560U1/de
Application filed by Saint-Gobain Industriekeramik Rödental GmbH filed Critical Saint-Gobain Industriekeramik Rödental GmbH
Publication of WO2018166957A1 publication Critical patent/WO2018166957A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2469—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollable bodies
    • 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 present invention relates to a ceramic roller base body, in particular for use in a roller kiln and a method for operating a roller kiln with the rollers according to the invention.
  • the metal sheets are coated with an AlSi Schutzz Anlagen.
  • the steel sheets are usually placed directly on the rollers or transported as an alternative in goods carriers through the roller kiln.
  • the AlSi-coated steel sheets are heated to 900 ° C. to about 1000 ° C., the AlSi protective layer softens and, as a result, upon contact with the roll material, contact corrosion occurs.
  • the object of the present invention is to provide a roller for a roller furnace, which has a significantly longer service life and a longer service life than known rollers and which does not overheat the sliding bearing, in particular at the ends.
  • the object of the invention is achieved by a roller for a roller furnace with a roller body, cavity and hollow ends, wherein the surface at the end of the roller has at least one elevation. By elevations at the ends of the contact surface is reduced to the inside of the sleeve. This ensures that the end of the roller does not overheat the sliding bearing.
  • the elevations are each independently preferably designed as a web or as a knob.
  • a preferred embodiment of the invention is a roller, wherein the elevations have at least one web and / or at least one knob. This achieves good results in reducing the contact between the roller and the sleeve.
  • a preferred embodiment of the invention is a roller, wherein the surface at the end of the roller has at least one web and / or at least one knob. This achieves good results in reducing the contact between the roller and the sleeve.
  • a preferred embodiment of the invention is a roller, wherein the surface at the end of the roller over the radius has two to ten webs and / or nubs, preferably six to eight webs and / or nubs and more preferably four webs and / or nubs. This achieves very good results in reducing the contact between the roller and the sleeve.
  • a preferred embodiment of the invention is a roller, wherein the surface at the end of the roller has two rows of webs and / or three rows of nubs. This achieves excellent results in reducing the contact between the roller and the sleeve.
  • a preferred embodiment of the invention is a roller, wherein the webs have a length of 5 mm to 15 mm, preferably 8 mm to 12 mm and particularly preferably 6 mm. With this length for the webs very good results are achieved in reducing the contact between the roller and the sleeve.
  • a preferred embodiment of the invention is a roller, wherein the end of the roller has at least one slot.
  • slots additionally cause the heat transfer within the roll to be reduced.
  • a preferred embodiment of the invention is a roller, wherein the end of the roller has two to six slots, preferably four slots. This achieves very good results in reducing the heat transfer in the roll.
  • a preferred embodiment of the invention is a roller, wherein the slot has the length of about one quarter to three quarters of the radius, preferably about half the radius at the end of the roller. At these lengths of slots, very good results are achieved in reducing heat transfer in the roll.
  • a preferred embodiment of the invention is a roller, wherein at the end of the roller, a sleeve is mounted and the sleeve has a spacer in the opening to the bearing finger.
  • the spacer preferably contains steatite, which has a poor thermal conductivity of 2 to 4 compared to metals of 50, or contains yttrium stabilized zirconia.
  • the spacer consists of yttrium-stabilized zirconium oxide.
  • the temperature advantageously remains well below 100 ° C.
  • the spacer is inventively applied so that the sleeve does not come into contact with the metal finger.
  • the metal finger only has contact with the spacer.
  • the spacer prevents the contact of the sleeve to the bearing block.
  • a preferred embodiment of the invention is a roller, wherein at the end of the roller next to the sleeve, a sheath is applied.
  • the sheath advantageously prevents the heat from the furnace from entering the roll from the outside.
  • the heat conduction takes place only over the role itself.
  • the role is of inside preferably filled with fibers and isolated from the outside partially with the sheath.
  • the jacket prevents heat conduction or heat transfer from the furnace to the outside of the sleeve. The temperature of 100 ° C is exceeded.
  • the sheathing is particularly helpful when the roller is installed in the roller kiln since the roller is protected from the furnace temperature. Since the sheath covers the slots in the roll, the slots are additionally protected.
  • a roller according to the invention with very good results is when the roller webs and / or nubs and has slots and the sleeve contains a spacer according to the invention and the role in operation preferably also carries a sheath on the end pieces.
  • the roll according to the invention preferably has a diameter of 60 mm to 80 mm, a length of 2500 mm to 4000 mm and a wall thickness of 6 mm to 14 mm, preferably 6 mm to 12 mm.
  • the roll according to the invention preferably has a taper at both ends over a length of 80 mm to 100 mm.
  • the elevations which are preferably formed as knobs or webs, are preferably arranged in the region of the taper.
  • Another solution of the object according to the invention is the method for operating a roller kiln with the rollers according to the invention.
  • a further solution of the object according to the invention is the use of the rolls according to the invention in the roller kiln for the hot forming of metal parts, in particular of AlSi-coated sheets.
  • the present invention will be explained in more detail with reference to drawings. The drawings in no way limit the invention.
  • FIG. 1 the side view of a roller for a roller kiln
  • FIG. 4 the longitudinal top view of the tapered end of a roll
  • FIG. 5 the longitudinal top view of the tapered end of a roll
  • FIG. 6 the longitudinal top view of the tapered end of a roll
  • FIG. 7 shows the frontal two-dimensional plan view of a sleeve with spacer
  • FIG. 8 the frontal three-dimensional plan view of a sleeve with spacer
  • FIG. 9 shows the two-dimensional cross-section of a sleeve with spacers along the line in FIG. 7, FIG.
  • Figure 10 shows the three-dimensional section of the tapered end of the roller with sleeve, spacers and bearing fingers, and
  • Figure 1 1 the top view of a roll with a sheath next to the tapered end of the roll.
  • the roller 1 shows the side view of a roll 1 for a roller furnace according to the prior art.
  • the roller 1 consists of a base body 2.
  • the roller 1 is a hollow tube with a cavity 3.
  • the roller 1 has at both ends a taper 4, for fixing the drive sleeve 7.
  • the roller 1 preferably contains as material N-Durance® , Also possible are other SiC or Mull it materials.
  • the role 1 points for example, a diameter of 60 mm to 80 mm and a length of 2700 mm to 3500 mm.
  • the roller 1 is tapered at both ends to a length of about 80 mm by about 1 mm.
  • FIG. 2 shows the longitudinal cross section of a roller 1 with a drive sleeve 7 at both tapered ends 4 of the roller 1 and with elevations 5 at both tapered ends 4 of the roller 1.
  • FIG. 3 shows the longitudinal plan view of the tapered end 4 of a roller 1 with webs 5a, FIG. 4 with rings 5c and FIG. 5 with knobs 5b.
  • the elevations 5 may be at least one web 5a, at least one nub 5b or at least one ring 5c.
  • the contact surface is reduced to the inside of the sleeve 7. This prevents that the ends of the roller 1, the sleeve 7 and thus the slide bearing does not overheat.
  • rings 5c are used then preferably two rings 5c are mounted on the end piece 4.
  • the end piece 4 over the radius four webs 5a and / or four nubs 5b.
  • the end piece 4 has two rows of webs 5a and / or three rows of nubs 5b.
  • a combination of webs 5a and nubs 5b is also possible.
  • two rows of 4 bars 5a each are shown and in FIG. 5 three rows of nubs 5b are shown.
  • the webs 5a have a length of 6 mm.
  • Figure 6 shows the longitudinal plan view of the tapered end 4 of a roll 1 with slots.
  • the slots 6 additionally cause the heat transfer within the roller 1 is reduced.
  • the tail has 2 to 6 slots 6, preferably 4 slots 6.
  • the slots 6 have the length of about half a radius of the end piece 4.
  • a very good combination results in end pieces 4 with elevations 5, preferably with webs 5a and / or nubs 5b and 6 each with slots.
  • the combination achieves very good results in reducing the heat transfer and heat conduction from the center of the roll to the roll end 4 .
  • the measurement results show that the wall thickness of the rollers has a comparatively small influence on the overheating.
  • Essential is the combination of nubs 5a and / or webs 5b each with slots 6, since the nubs 5a and 5b webs the Reduce contact with the sleeve 7 and reduce the slots 6, the heat transport within the roller 1.
  • FIG 7 to Figure 9 show the sleeve 7 with spacer 8. It has been found that the rollers 1, which are clamped horizontally, migrate to one direction. As a result of the movement, the metallic sleeve 7 strikes the metal slide bearing or the bearing block. When contact of the metallic parts, the thermal conductivity is large.
  • FIG. 10 shows how the roll 1 is prevented from migrating to the plain bearing. This is achieved by inserting a Spacer 8 (Spacer, Insert).
  • the spacer 8 preferably contains steatite and has a poor thermal conductivity of 2 to 4 instead of 50 for metals or contains yttrium stabilized zirconia. It is prevented that the temperature of 100 ° C is exceeded. The temperature remains well below 100 ° C.
  • the spacer 8 is applied so that the sleeve 7 does not come into contact with the metal finger 9.
  • the metal finger 9 only has contact with the spacer 8.
  • the spacer 8 prevents the roller from migrating to the edge and thereby comes into direct contact with the metallic bearing block or with the bearing.
  • a particularly preferred embodiment of the invention is a roller 1 with end pieces 4, which contain webs 5a and / or nubs 5b and slots 6 and where at the same time the sleeves 7 each contain a spacer 8.
  • An alternative to the spacer 8 is a ceramic disc. The effect is the same as for the spacer 8. The ceramic disc is applied to the bearing block.
  • Figure 1 1 shows the top view of a roll 1 with a sheath 10 adjacent to the tail 4 with sleeve 7 and spacer 8.
  • the rollers 1 receive caking after prolonged use in the oven.
  • the roles 1 must be partially removed and replaced several times.
  • the caking increases the outer diameter of the rollers.
  • the oven insulation is violated when changing and increases the gap between the roll and insulation.
  • the larger the gap the higher the heat transfer to the slide bearing. Therefore, it is advantageous on the roll 1, a sheath 10 (cap or sleeve) made of a material with low density and thermal conductivity, such as fiber material, apply. Under the sleeve 10, the slots 6 sit in the tube.
  • the cuff 10 has a width of 5 cm to 15 cm, preferably from 8 cm to 12 cm.
  • the sleeve 10 prevents heat from the oven to the outside of the roller, so that the heat conduction takes place only via the roller 1 itself.
  • the roll 1 is preferably filled with fibers from inside and insulated from the outside with the sleeve 10.
  • the sleeve 10 prevents the heat conduction or the heat transfer from the furnace to the sleeve 7 from the outside.
  • the cuff 10 is particularly helpful when the roller 1 is installed because the roller 1 is protected from the open temperature.
  • the cuff 10 is advantageous.
  • a very good roll according to the invention is present with webs and / or nubs and with slots, with a spacer in the sleeve and with a sleeve on the end pieces.
  • the temperature of 100 ° C is advantageously exceeded by the role of the invention and the life of the plain bearings is extended.
  • roller according to the invention Another advantage of the roller according to the invention is that heat transfer to the outside is reduced to the bearing and thereby to the environment. The energy losses are thereby advantageously reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

L'invention concerne un rouleau pour four roulant à réchauffer, comprenant un corps de base, une cavité et des extrémités (4) creuses, la surface à l'extrémité (4) du rouleau (1) présentant au moins une élévation (5), les élévations (5) étant des nervures (5a) et/ou des tétons (5b).
PCT/EP2018/056042 2017-03-17 2018-03-12 Rouleau pour four roulant à réchauffer WO2018166957A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102017105774.9A DE102017105774A1 (de) 2017-03-17 2017-03-17 Rolle für einen Rollenofen
DE202017101560.2 2017-03-17
DE202017101560.2U DE202017101560U1 (de) 2017-03-17 2017-03-17 Rolle für Rollenofen
DE102017105774.9 2017-03-17

Publications (1)

Publication Number Publication Date
WO2018166957A1 true WO2018166957A1 (fr) 2018-09-20

Family

ID=61628349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/056042 WO2018166957A1 (fr) 2017-03-17 2018-03-12 Rouleau pour four roulant à réchauffer

Country Status (1)

Country Link
WO (1) WO2018166957A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230065933A1 (en) * 2020-03-13 2023-03-02 Schwartz Gmbh Mounting a Ceramic Roller in a Roller Hearth Furnace

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007153656A (ja) * 2005-12-02 2007-06-21 Asahi Glass Co Ltd ガラス搬送用部材およびその製造方法
WO2010094716A1 (fr) * 2009-02-17 2010-08-26 Von Ardenne Anlagentechnik Gmbh Cylindre de transport avec capuchons d'extrémité
WO2011061446A2 (fr) * 2009-11-20 2011-05-26 Snecma Propulsion Solide Rouleau composite de ligne de recuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007153656A (ja) * 2005-12-02 2007-06-21 Asahi Glass Co Ltd ガラス搬送用部材およびその製造方法
WO2010094716A1 (fr) * 2009-02-17 2010-08-26 Von Ardenne Anlagentechnik Gmbh Cylindre de transport avec capuchons d'extrémité
WO2011061446A2 (fr) * 2009-11-20 2011-05-26 Snecma Propulsion Solide Rouleau composite de ligne de recuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230065933A1 (en) * 2020-03-13 2023-03-02 Schwartz Gmbh Mounting a Ceramic Roller in a Roller Hearth Furnace

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