EP0189855B1 - Dispositif pour diriger uniformément un gaz vers une surface plane - Google Patents

Dispositif pour diriger uniformément un gaz vers une surface plane Download PDF

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Publication number
EP0189855B1
EP0189855B1 EP86100915A EP86100915A EP0189855B1 EP 0189855 B1 EP0189855 B1 EP 0189855B1 EP 86100915 A EP86100915 A EP 86100915A EP 86100915 A EP86100915 A EP 86100915A EP 0189855 B1 EP0189855 B1 EP 0189855B1
Authority
EP
European Patent Office
Prior art keywords
slot
nozzle openings
nozzle
openings
heat transfer
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
EP86100915A
Other languages
German (de)
English (en)
Other versions
EP0189855A3 (en
EP0189855A2 (fr
Inventor
Carl Prof.Dr.-Ing. Kramer
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.)
Otto Junker GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86100915T priority Critical patent/ATE73863T1/de
Publication of EP0189855A2 publication Critical patent/EP0189855A2/fr
Publication of EP0189855A3 publication Critical patent/EP0189855A3/de
Application granted granted Critical
Publication of EP0189855B1 publication Critical patent/EP0189855B1/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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges

Definitions

  • the invention relates to a device for uniformly applying a gas to a flat surface.
  • the aim is to drive the heat transfer in a chamber furnace, as is used, for example, in the aluminum industry for annealing strip coils, as high as possible. If the blowing system used leads to large local differences in the heat transfer, local overheating can occur, which can cause discoloration of the metal strips and can also impair the desired metallurgical properties of the strips.
  • a device for uniformly loading a flat surface of a workpiece in which the fluid medium exits through slots or openings to blow off workpieces.
  • the known device is provided for uniformly blowing off semiconductor wafers in order to thereby remove foreign bodies or liquids from their surface.
  • said fluid medium is blown out through slots or openings which are arranged on a rotating disk and directed onto the workpiece.
  • a device for drying ceramic moldings is known.
  • a nozzle is rotatably arranged above a molding to be dried, which directs drying agent supplied to the molding via a feed line.
  • the purpose of the rotation of the nozzle of the known device is that moisture can be removed from the ceramic molding evenly, so that no stresses arise in the molding. This is intended to improve the quality of the ceramic moldings and to reduce the number of moldings.
  • the invention is therefore based on the object to create a device that is particularly suitable for evenly applying a gas to a flat surface of a workpiece, the heat transfer between the gas and the flat surface of the workpiece being as high as possible and at the same time taking place as uniformly as possible over the entire surface.
  • the advantages achieved with the invention are based, in particular, on the fact that in a simple embodiment which is yet to be explained, the ratio between the locally maximum and locally minimum heat transfer coefficient is approximately 1.2, that is to say the discernible difference between the two extreme values is very small.
  • This has to be related to a value of 1.9 for a blower system that uses hole nozzles and a value of about 1.7 for a blower system that uses conventional slot nozzles that just impinge on the one to be impinged Straighten the surface.
  • This new blowing system is particularly suitable for the application of a gas flow to the ends of strip coils, the heat transfer coefficient of which is almost constant over the entire end face.
  • the heating takes place essentially via the end faces, since the heat conduction in the radial direction only makes up a fraction of the heat conduction in the axial direction because of the separating surfaces between the individual turns of the collar.
  • the device for uniform loading of the two end faces of a metal band bundle in particular an aluminum band bundle 12, which is shown in FIG. 1 and is generally indicated by the reference numeral 10, has an all-round closed housing with a bottom 14, two hollow side walls 16, 18 designed as blowing chambers and a cover 20, in which a radial fan 22 serving as a drive for the circulated gas flow is integrated.
  • the band 12 is held by supports 24 so that its two end faces face the side walls 16 and 18.
  • the two further side walls can be closed by doors and serve to load this "chamber furnace" 10.
  • slot-shaped nozzles 26 are integrated, which extend radially outwards from a common center. It is advantageous to arrange the band collar 12 in such a way that its axis 27 passes through these center points 29 as precisely as possible, that is to say it is concentric with the radial nozzle arrangement.
  • the area of the side walls 16, 18 covered by the slot nozzles 26 will be referred to below as the “nozzle bottom”.
  • slot nozzles 26 thus lie in a common plane formed by the inner surface of the side walls 16, 18. Their nozzle openings also lie at least approximately in one plane, the direction of the gas streams emerging from the nozzle openings being inclined towards the plane in which the nozzle openings lie.
  • FIG. 5 shows a perspective view of the nozzle base indicated by reference numeral 28, from which the individual slot nozzles 26 each project with different inclinations, as can be seen from the angles shown.
  • the nozzle base 28 In the middle of the nozzle base 28 there is a circular area with the diameter D i which is left blank, ie no slot nozzles 26 are provided in this area 29.
  • the slot nozzles 26 extend radially outward from the edge of the circular region 25 with the diameter D i , both the angles between the individual slot nozzles 26 and the inclination the slot nozzles can be different with respect to the nozzle bottom 28.
  • the radially outer ends of the slot nozzles 26 lie on a circle with the diameter D a .
  • Fig. 6 shows a plan view of different embodiments of the slot nozzles, namely in sector I slot-shaped openings with variable width in the radial direction, in sector II slot nozzles with different extensions in the radial direction, in sector III slot nozzles with different angles between the individual jets and finally in sector IV an embodiment in which a plurality of rows of perforated nozzles running in the radial direction are used instead of the slot-shaped nozzle opening.
  • Fig. 7 shows a detailed view of a modification in which the openings of the slot nozzles are "twisted", i.e. the inclination of the slot nozzles 26 changes with the radius, resulting in a curved slot axis.
  • FIG. 8 shows two embodiments in which flow guiding devices 30 are integrated in the slot-shaped nozzle openings, which in turn are adapted to the inflow direction.
  • These flow control devices 30 are either straight (right variant) or e.g. bent in the direction of inclined inflow (left variant).
  • the angle between the individual slot nozzles 26 is approximately 45 °.
  • the radial fan 22 rotating in the direction of the arrow generates an air flow which initially flows outward and is then deflected downward into the hollow side walls 16, 18 in the direction of the arrows.
  • This gas stream then emerges from the hollow side walls 16, 18, namely from the slot nozzles 26, and acts on the end faces of the band collar 12.
  • These end surfaces run parallel to the nozzle bottoms 28, i.e. the slot nozzles 26 are inclined relative to the end surfaces of the band collar 12.
  • the angle of inclination between the nozzle base 28 and the slot nozzles 26 is expediently selected so that it corresponds to the direction of rotation of the vortex which results from the usual loading of the chambers in the side walls 16, 18 by means of the radial fan 22 built into the furnace ceiling 20 in the case of conventional chamber furnace designs.
  • By coordinating the inclination to the direction of rotation of this vortex it is achieved that all slot nozzles 26 are flowed in approximately in the same direction, which is advantageous with regard to a quantity distribution that corresponds as closely as possible to the cross section of these slot nozzles 26.
  • FIG. 2 shows a perspective distribution of the local heat transfer coefficients for a blowing system consisting of a single perforated nozzle. Relative to the axis of the nozzle jets (three nozzle jets are indicated in FIG. 2), there is a curve for the heat transfer distribution which is similar in cross section to a volcanic crater. A relative minimun is formed at the stagnation point, which is surrounded by a maximum value corresponding to the crater rim. The ratio of maximum to minimum heat transfer coefficients is approximately 1.9.
  • FIG. 3 shows a corresponding, perspective representation of the distribution of the local heat transfer coefficient for a slot nozzle system which generates vertically incident nozzle jets.
  • the course is similar to that of FIG. 2.
  • the distribution of the heat transfer coefficient over the end face of a band bundle is very uneven.
  • the ratio of maximum to minimum heat transfer coefficient is approximately 1.7.
  • the maximum permissible average heat transfer coefficient would be 110W / (m2 K) for the perforated nozzle system, 130W / (m2 K) for the slotted nozzle system and for the new blowing system with the inclined slot nozzles are 160W / (m2 K).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Nozzles (AREA)
  • Heat Treatment Of Articles (AREA)
  • Air Bags (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Coating With Molten Metal (AREA)

Claims (10)

  1. Dispositif pour faire agir un gaz de manière régulière sur la surface plane d'une pièce, et en particulier sur les deux surfaces frontales d'une bobine de bande, constitué d'un boîtier fermé de tous les côtés avec un fond (14), deux parois latérales (16 et 18) en forme de chambres de soufflage tandis que les faces intérieures des parois latérales (16, 18) constituent un fond à tuyères fixes (28) avec des orifices de tuyères en forme de fentes dans lequel les axes longitudinaux des orifices à tuyères en forme de fentes sont disposés radialement, et que la direction d'inclinaison des orifices à tuyères est telle que la direction des courants gazeux sortant des orifices des tuyères est inclinée dans le même sens par rapport au plan dans lequel se trouvent les orifices à tuyères.
  2. Dispositif selon la revendication 1, caractérisé en ce que les orifices des tuyères (26) ont des sections différentes en direction radiale.
  3. Dispositif selon la revendication 2, caractérisé en ce que les sections des orifices des tuyères (26) en forme de fentes augmentent linéairement et radialement vers l'extérieur depuis la zone centrale (25).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les orifices de tuyères en forme de fentes (26) sont inclinés par rapport au fond à tuyères fixes (28) de façon à ce que l'inclinaison de l'écoulement sortant se modifie en direction radiale le long des orifices à tuyères (26).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les orifices de tuyères à fentes (26) ont des longueurs différentes en direction radiale.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les angles entre les axes longitudinaux des sections de sortie des tuyères disposées en forme de rayons sont différents.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que les orifices de tuyères à fente (26) disposés en forme de rayons sont constitués chaque fois par une seule fente longitudinale.
  8. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que les orifices de tuyères à fente (26) sont formés constructivement par des rangées de trous.
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que des dispositifs de guidage d'écoulement (30) sont disposés avant les orifices de tuyères à fente (26) lorsqu'on regarde dans la direction de l'écoulement.
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que le fond à tuyères (28) présente une zone centrale fermée (25).
EP86100915A 1985-01-30 1986-01-23 Dispositif pour diriger uniformément un gaz vers une surface plane Expired - Lifetime EP0189855B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100915T ATE73863T1 (de) 1985-01-30 1986-01-23 Vorrichtung zur gleichmaessigen beaufschlagung einer planen flaeche mit einem gas.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503089 1985-01-30
DE19853503089 DE3503089A1 (de) 1985-01-30 1985-01-30 Vorrichtung zur gleichmaessigen beaufschlagung einer planen flaeche mit einem gas

Publications (3)

Publication Number Publication Date
EP0189855A2 EP0189855A2 (fr) 1986-08-06
EP0189855A3 EP0189855A3 (en) 1988-09-21
EP0189855B1 true EP0189855B1 (fr) 1992-03-18

Family

ID=6261175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100915A Expired - Lifetime EP0189855B1 (fr) 1985-01-30 1986-01-23 Dispositif pour diriger uniformément un gaz vers une surface plane

Country Status (6)

Country Link
US (1) US4736529A (fr)
EP (1) EP0189855B1 (fr)
JP (1) JPS61201734A (fr)
AT (1) ATE73863T1 (fr)
CA (1) CA1240507A (fr)
DE (2) DE3503089A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5413438A (en) * 1986-03-17 1995-05-09 Turchan; Manuel C. Combined hole making and threading tool
AT399164B (de) * 1992-12-04 1995-03-27 Ebner Ind Ofenbau Vorrichtung zum beaufschlagen planer werkstückoberflächen mit einem gas, insbesondere der stirnflächen eines bandbundes in einem kammerofen
DE4243127A1 (de) * 1992-12-19 1994-06-23 Gautschi Electro Fours Sa Verfahren und Vorrichtung zur Wärmebehandlung von Wärmgut in einem Industrieofen
US5553394A (en) * 1995-05-11 1996-09-10 Reliance/Comm Tech Corporation Radial jet reattachment nozzle heat sink module for cooling electronics
DE19650965C1 (de) * 1996-12-07 1998-08-13 Kramer Carl Vorrichtung zur gleichmäßigen Beaufschlagung einer planen Oberfläche eines Werkstückes mit einem Fluid
US5937536A (en) * 1997-10-06 1999-08-17 Pharmacopeia, Inc. Rapid drying oven for providing rapid drying of multiple samples
EP1490524B2 (fr) † 2002-03-15 2009-01-21 Schwartz, Eva Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece
US7832177B2 (en) 2002-03-22 2010-11-16 Electronics Packaging Solutions, Inc. Insulated glazing units
DE102004028236B3 (de) * 2004-06-11 2005-11-17 Rolf-Josef Schwartz Verfahren und Vorrichtung zum Erwärmen von Werkstücken vor der Warm- oder Halbwarmumformung
US9328512B2 (en) 2011-05-05 2016-05-03 Eversealed Windows, Inc. Method and apparatus for an insulating glazing unit and compliant seal for an insulating glazing unit
ITMI20111092A1 (it) * 2011-06-17 2012-12-18 Eagle Tech S R L Cappa perfezionata per il raffreddamento controllato di profili estrusi di alluminio o di altri metalli in uscita dalla linea di estrusione.
DE102011056823A1 (de) * 2011-12-21 2013-06-27 Thyssen Krupp Steel Europe AG Düseneinrichtung für einen Ofen zum Wärmebehandeln eines Stahlflachprodukts und mit einer solchen Düseneinrichtung ausgestatteter Ofen
DE102014106135A1 (de) * 2014-04-30 2015-11-05 Thyssenkrupp Ag Düseneinrichtung und Verfahren zur Behandlung eines Stahlflachproduktes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB878497A (en) * 1957-02-13 1961-10-04 Lee Wilson Method of and apparatus for annealing strip metals
GB1266956A (fr) * 1968-04-30 1972-03-15
DE2345734A1 (de) * 1973-09-11 1975-03-20 Peters Ag Claudius Rostplatte fuer kuehl- und brennroste
US3849906A (en) * 1973-11-07 1974-11-26 Ibm Rotary fluid applicator
US3887135A (en) * 1973-11-15 1975-06-03 Shigetake Tamai Gas-atomizing nozzle by spirally rotating gas stream
DE2454202A1 (de) * 1974-11-15 1976-05-26 Kloeckner Humboldt Deutz Ag Rostplatte fuer rostkuehler
US4030712A (en) * 1975-02-05 1977-06-21 Alco Standard Corporation Method and apparatus for circulating a heat treating gas
DD124937A1 (fr) * 1975-11-20 1977-03-23
US4155701A (en) * 1977-09-26 1979-05-22 The Trane Company Variable capacity burner assembly
US4261517A (en) * 1979-11-23 1981-04-14 General Electric Company Atomizing air metering nozzle

Also Published As

Publication number Publication date
JPH0218365B2 (fr) 1990-04-25
ATE73863T1 (de) 1992-04-15
JPS61201734A (ja) 1986-09-06
EP0189855A3 (en) 1988-09-21
US4736529A (en) 1988-04-12
DE3503089A1 (de) 1986-07-31
EP0189855A2 (fr) 1986-08-06
CA1240507A (fr) 1988-08-16
DE3503089C2 (fr) 1988-12-08
DE3684339D1 (de) 1992-04-23

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