EP0864518B1 - Schwebedüsenfeld zur schwebenden Führung von Warenbahnen - Google Patents
Schwebedüsenfeld zur schwebenden Führung von Warenbahnen Download PDFInfo
- Publication number
- EP0864518B1 EP0864518B1 EP98102362A EP98102362A EP0864518B1 EP 0864518 B1 EP0864518 B1 EP 0864518B1 EP 98102362 A EP98102362 A EP 98102362A EP 98102362 A EP98102362 A EP 98102362A EP 0864518 B1 EP0864518 B1 EP 0864518B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- web
- float
- areas
- set forth
- 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
Links
- 238000007667 floating Methods 0.000 title claims description 35
- 239000000463 material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
- F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/10—Means using fluid made only for exhausting gaseous medium
- B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
- B65H2406/112—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along preferably rectilinear path, e.g. nozzle bed for web
Definitions
- the invention relates to a floating nozzle field for the floating guidance of material webs the genus specified in the preamble of claim 1, see e.g. US-A-3 638 330.
- Typical devices of this type are from DE-OS 25 56 442, DE-OS 30 26 132, DE-AS 14 74 239 and DE-OS 35 05 256 known. All of these devices has in common that above and below the generally guided horizontally Web nozzle ribs are arranged transversely to the web transport direction. Between these Ribs with which the floating guide is guided by appropriate flow forces is caused, there are the backflow surfaces for the outflow of the Nozzle ribs on the inflated gas stream to be guided. With all These devices are also used for the convective with the floating guide Heat transfer for heating or cooling the floating guided Train.
- Such a device such as. B. according to DE-OS 30 26 132, with a variety of nozzle fins not only requires complex production, but also shows also a functional disadvantage because the levitation force only in the Area of the projection of the respective nozzle rib can be applied to the tape can and the space between the nozzle ribs for the backflow remain got to.
- a correspondingly larger one Proportion of the fan that circulates the gas in the device, achieved pressure increase is used only for the backflow.
- the effect described has a particularly disadvantageous effect in devices such as according to DE-OS 40 10 280, in which the backflow only between the Nozzle fins can take place.
- An increase in the pending to lead Volume inflated web does not lead to a corresponding one Increasing the load capacity, since at the same time the flow velocity is limited Reverse flow cross section must be increased, resulting in the area of the projection the return flow cross sections on the web due to the also increased convective acceleration increases the pressure drop. So it will be in Area of the nozzle ribs built up a larger overpressure, but at the same time the Negative pressure in the area of the backflow surface increased, so that overall no significant Increase comes about.
- the lateral outflow occurs whenever there is one Material web to be carried at a considerable distance from a nozzle range should. A considerable distance is required if, for. B. the web Semi-finished metal band is that under the influence of floating while guiding heat treatment deformed. Here are the distances between the web and nozzle range of 100 mm and more required. Such a distance can be not achieve on heavier tracks with the above-mentioned devices.
- the task is to create a floating nozzle field with which wide and, at the same time, heavy webs can also be guided and the the disadvantages described above can be avoided.
- the nozzle surfaces Width changes across the direction of the web, e.g. from the middle of the web decreases towards the outside.
- this embodiment to the web open backflow channels their width increases from the center of the web to the edges of the web and through which the gas stream inflated onto the material web can flow laterally from it.
- the inflow to the nozzle surfaces comes from a channel that is on the of the side of the nozzle surface facing away from the web and either of charged with the blowing gas from one end face or from both end faces becomes.
- FIG. 1 at the top left is a prior art floating nozzle field, formed from nozzle ribs, the width of which does not vary across the width of the web changed, with the nozzle array according to the invention in different embodiments juxtaposed.
- Nozzle areas shown that are more constant compared to the nozzle fins
- the width is spread in the middle, i.e. the nozzle surfaces this floating jet field have the greatest width in the middle and narrow then rectilinearly towards the edges to the smallest width, which is about the usual constant width can correspond.
- the three illustrated embodiments differ only in the "spread angle" W, namely at the angle W between the perpendicular on the center line the floating nozzle field and the longitudinal edge of each nozzle surface.
- This angle W changes by 15 ° (top right) over 22 ° (lower left) to 45 ° (lower right), which is basically a square Nozzle area results in two corners on the longitudinal edges of the floating nozzle field lie.
- the c p max value is used to characterize the load capacity. This is the pressure corresponding to the basis weight of the web to be guided in a floating manner, based on the dynamic pressure in the floating nozzle openings, which is at a maximum, that is to say with a small distance between the web of material and the nozzle surface.
- This c p max depends crucially on the ratio of the nozzle area to the total blown area of the web. This value is 0.31 for the floating nozzle field consisting of nozzle ribs of constant width. In the various embodiments of the nozzle field according to the invention, this value is between 0.62 and 0.68, depending on the shape of the nozzle surface (angle W). This comparison already shows that, with the nozzle field according to the invention, significantly larger basis weights can be carried without problems under the same conditions than with a standard nozzle field with nozzle ribs.
- a floating nozzle field 1 according to the invention is shown in perspective. For the sake of clarity of illustration, only half of the nozzle field is shown 1 and the associated flow supply 3, namely a supply box 3 shown with a radial fan 4.
- the edges of web 2 are through dashed lines 2 indicated. If the web 2 were blown on both sides, one would second device of this type above the web 2, i.e. on the web 2 mirrored, arranged. But it is also possible to have the nozzle field only on one side, in the case of a horizontally guided path, only to be arranged below path 2.
- the actual floating nozzle field is divided by several in the direction of the web consecutive nozzle surfaces 1 formed, which over individual flow chambers 11, a collecting box 10 and an intermediate piece 9 to the supply box 3 are connected with radial fan 4.
- the flow chambers 11 are on its upper surface facing the web 2 with the nozzle surfaces 1 and have a top view of the shape of the nozzle surfaces 1 as shown in FIG. 1 is shown.
- the collecting box 10 is from one end fed here. But it is also the supply from both ends, or but central feeding possible.
- the nozzle surfaces 1 of this floating nozzle field are on the largest part of their circumference surrounded by the slot nozzles 5. Only at the blunt end areas that run parallel to the edges 2 of the web, there are no slot nozzles 5.
- slot nozzles 5 direct slot jets against the web, which are for each nozzle surface 1 are inclined towards the middle of the same.
- slot nozzles 5 which surround one and the same nozzle surface 1, inclined towards each other.
- the Nozzle surface 1 itself is equipped with perforated nozzles 6.
- These channels 7 expand from the middle of the web to Edge of the web in its extension in the direction of web travel due to the shape of the Nozzle fields 1.
- the height of the channel cross section increases perpendicular to Plane, viewed from the center of the nozzle field towards the edge, as the Collecting box 10 has a kind of gable roof.
- the outflow, represented by Flow arrows 8 takes place to the sides of the device and passes through the Nozzle field 1 supplying flow channel 10, 9, 3 to the suction area of the radial fan 4, which supplies the nozzle field 1 with the blowing gas.
- FIG 3 is yet another embodiment of the floating nozzle field according to the Invention shown schematically in plan view.
- the nozzle slots 5 which the Border nozzle surfaces 1 at least partially around their circumference, also with themselves executed along the longitudinal extent of the nozzle slot 5 changing width his.
- a further adjustment of the levitation behavior is still possible in that the Nozzle surfaces 1 with a V-shape, based on the longitudinal axis of the floating nozzle field, be carried out.
- the V-shape can both towards the web and also be directed away from the train.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Drying Of Solid Materials (AREA)
- Tunnel Furnaces (AREA)
- Advancing Webs (AREA)
Description
- Figur 1
- einen Vergleich eines aus üblichen Schwebedüsenrippen gebildeten Schwebedüsenfeldes mit verschiedenen Ausführungsformen des Schwebedüsenfeldes nach der Erfindung,
- Figur 2
- eine perspektivische Darstellung des Schwebedüsenfeldes nach der Erfindung mit Düsenflächen entsprechend dem Mittelschnitt eines Doppelkegelstumpfes, mit den wesentlichen Elementen der zugehörigen Strömungsführung, und
- Figur 3
- eine andere erfindungsgemäße Ausführungform des Schwebedüsenfeldes in schematischer Darstellung in der Draufsicht.
Claims (10)
- Schwebedüsenfeld zur schwebenden Führung und Stabilisierung von Warenbahnen, vorzugsweise Metallbändern, zum Zwecke der berührungsfreien Wärmeübertragung oder Trocknunga) mit mindestens auf einer Seite der schwebend zu führenden Bahn (2) angeordneten, in Bahnlaufrichtung aufeinanderfolgenden Düsenflächen (1) mit Düsenöffnungen aus Rundlöchern (6) und/oder Schlitzdüsen (5), dadurch gekennzeichnet, daßb) die Breite der Düsenflächen (1), gemessen parallel zur Bahnlaufrichtung, sich über die Breite des Düsenfeldes, gemessen senkrecht zur Bahnlaufrichtung, verändert, und daßc) die Düsenflächen (1) mindestens teilweise an ihrem Umfang von Schlitzdüsen (5) eingefaßt sind.
- Schwebedüsenfeld nach Anspruch 1, dadurch gekennzeichnet, daß sich die Breite der Düsenflächen (1) zu den Rändern (2) der Warenbahn (1) hin verringert, insbesondere, daß die Düsenflächen (1) die Form des Axialschnittes eines Doppelkegelstumpfes oder eines Fasses aufweisen, wobei die Basis des Doppelkegelstumpfes bzw. der größte Durchmesser des Fasses in der Mitte (8) der Schwebedüse liegt.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die aus den die Düsenflächen (1) umgebenden Düsenschlitzen (5) austretenden Strahlen zur Mitte der Düsenfläche (8) gegeneinander geneigt sind.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen den Düsenschlitzen (5) in den Düsenflächen (1) Lochdüsen (6) angeordnet sind.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zwischen den Düsenflächen zur Bahnfläche hin offene Kanäle (7) angeordnet sind, deren Querschnitt sich von der Mitte des Schwebedüsenfeldes zu dessen Rändern hin erweitert.
- Schwebedüsenfeld nach Anspruch 5, dadurch gekennzeichnet, daß die Erweiterung der zur Bahn hin offenen Kanalquerschnitte sowohl durch eine Vergrößerung der in Bahnlaufrichtung gemessenen Breite als auch durch eine Vergrößerung der senkrecht zur Bahnfläche gemessenen Tiefe erfolgt.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die zwischen Düsenflächen (1) geführte Bahn gegenüber der Horizontalen geneigt ist.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Düsenflächen (1), bezogen auf ihre zur Bahnlaufrichtung parallele Mittelachse, eine V-Form aufweisen.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß Gruppierungen von Düsenflächen, in Bahnlaufrichtung betrachtet, nebeneinander angeordnet sind.
- Schwebedüsenfeld nach mindestens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Düsenschlitze (5) entlang ihrer Längserstreckung unterschiedliche Breiten aufweisen.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29813660U DE29813660U1 (de) | 1997-03-12 | 1998-02-11 | Schwebedüsenfeld zur schwebenden Führung von Warenbahnen |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19710142A DE19710142B4 (de) | 1997-03-12 | 1997-03-12 | Vorrichtung zur Wärmebehandlung schwebend geführter Bänder - Schwebeofen |
DE19710142 | 1997-03-12 | ||
US09/394,139 US6231001B1 (en) | 1997-03-12 | 1999-09-10 | Nozzle array for levitational guidance of web material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0864518A1 EP0864518A1 (de) | 1998-09-16 |
EP0864518B1 true EP0864518B1 (de) | 2001-10-31 |
Family
ID=26034764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98102362A Expired - Lifetime EP0864518B1 (de) | 1997-03-12 | 1998-02-11 | Schwebedüsenfeld zur schwebenden Führung von Warenbahnen |
Country Status (3)
Country | Link |
---|---|
US (1) | US6231001B1 (de) |
EP (1) | EP0864518B1 (de) |
DE (1) | DE19710142B4 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10306509A1 (de) * | 2003-02-14 | 2004-09-02 | Otto Junker Gmbh | Düsenfeld zur schwebenden Führung von Warenbahnen |
DE10326071A1 (de) * | 2003-06-10 | 2005-01-13 | Kramer, Carl, Prof. Dr.-Ing. | Umlenkvorrichtung für bewegte Bänder |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT409183B (de) * | 2000-05-05 | 2002-06-25 | Ebner Peter Dipl Ing | Vorrichtung zum führen eines metallbandes auf einem gaskissen |
FR2821285B1 (fr) | 2001-02-23 | 2003-11-28 | Saint Gobain Seva | Dispositif de soufflage d'un fluide sur au moins une face d'un element mince, et unite de soufflage associe |
GB0123479D0 (en) * | 2001-09-29 | 2001-11-21 | Eastman Kodak Co | Photographic media dryer |
US7311234B2 (en) * | 2005-06-06 | 2007-12-25 | The Procter & Gamble Company | Vectored air web handling apparatus |
DE102005054995B4 (de) * | 2005-07-28 | 2014-03-13 | Otto Junker Gmbh | Düsensystem für die Behandlung von bahnförmigem Gut |
US8061055B2 (en) * | 2007-05-07 | 2011-11-22 | Megtec Systems, Inc. | Step air foil web stabilizer |
SE535634C2 (sv) | 2010-11-16 | 2012-10-23 | Andritz Tech & Asset Man Gmbh | Cellulosatork som har nedre blåslådor samt förfarande för torkning av en bana av cellulosamassa |
DE102011103806B3 (de) * | 2011-06-01 | 2012-11-22 | Otto Junker Gmbh | Vorrichtung zum schwebenden Führen von metallischen Bändern mittels eines Gases sowie ein Verfahren zum Betreiben einer solchen Vorrichtung |
DE102014006233A1 (de) | 2014-04-30 | 2015-11-05 | Otto Junker Gmbh | Vorrichtung zur schwebenden Führung von bahnförmigem Material |
US10921059B2 (en) * | 2018-10-04 | 2021-02-16 | Illinois Tool Works Inc. | Method and apparatus for a dryer system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1143474B (de) * | 1960-02-08 | 1963-02-14 | Artos Maschb Dr Ing Meier Wind | Duesengehaeuseanordnung fuer die Behandlung und beruehrungsfreie Fuehrung von bahnfoermigem Gut |
US3638330A (en) * | 1970-05-08 | 1972-02-01 | Web Press Eng Inc | Web support nozzles for drier |
US3672066A (en) * | 1970-10-30 | 1972-06-27 | Bechtel Int Corp | Microwave drying apparatus |
US3662476A (en) * | 1970-12-30 | 1972-05-16 | Offen & Co Inc B | Air flow control structure for web driers |
DE2446983C2 (de) * | 1974-10-02 | 1985-09-19 | Kramer, Carl, Prof. Dr.-Ing., 5100 Aachen | Vorrichtung zur beidseitigen Beblasung eines bahnförmigen Materials |
DE3026132A1 (de) * | 1980-07-10 | 1982-02-11 | Carl Prof. Dr.-Ing. 5100 Aachen Kramer | Duesensystem |
JPS583931A (ja) * | 1981-06-29 | 1983-01-10 | Chugai Ro Kogyo Kaisha Ltd | 帯状材料の浮揚装置および浮揚式熱処理炉 |
US4501553A (en) * | 1981-06-29 | 1985-02-26 | Chugai Ro Co., Ltd. | Floating equipment and floating-type heat treating furnace for striplike works |
DE4010280A1 (de) | 1990-03-30 | 1991-10-02 | Wsp Ingenieurgesellschaft Fuer | Vorrichtung zur beidseitigen beblasung eines bahnfoermigen materials mit einem behandlungsgas |
JP3395336B2 (ja) * | 1994-02-28 | 2003-04-14 | 大同特殊鋼株式会社 | 帯板浮揚支持装置 |
-
1997
- 1997-03-12 DE DE19710142A patent/DE19710142B4/de not_active Expired - Fee Related
-
1998
- 1998-02-11 EP EP98102362A patent/EP0864518B1/de not_active Expired - Lifetime
-
1999
- 1999-09-10 US US09/394,139 patent/US6231001B1/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10306509A1 (de) * | 2003-02-14 | 2004-09-02 | Otto Junker Gmbh | Düsenfeld zur schwebenden Führung von Warenbahnen |
DE10306509B4 (de) * | 2003-02-14 | 2007-08-23 | Otto Junker Gmbh | Düsenfeld zur schwebenden Führung von Warenbahnen |
DE10326071A1 (de) * | 2003-06-10 | 2005-01-13 | Kramer, Carl, Prof. Dr.-Ing. | Umlenkvorrichtung für bewegte Bänder |
DE10326071B4 (de) * | 2003-06-10 | 2005-09-01 | Kramer, Carl, Prof. Dr.-Ing. | Umlenkvorrichtung für bewegte Bänder |
Also Published As
Publication number | Publication date |
---|---|
US6231001B1 (en) | 2001-05-15 |
DE19710142A1 (de) | 1998-09-17 |
DE19710142B4 (de) | 2005-07-28 |
EP0864518A1 (de) | 1998-09-16 |
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