DE10256512A1 - Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact - Google Patents

Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact

Info

Publication number
DE10256512A1
DE10256512A1 DE10256512A DE10256512A DE10256512A1 DE 10256512 A1 DE10256512 A1 DE 10256512A1 DE 10256512 A DE10256512 A DE 10256512A DE 10256512 A DE10256512 A DE 10256512A DE 10256512 A1 DE10256512 A1 DE 10256512A1
Authority
DE
Germany
Prior art keywords
web
row
jets
nozzle
perforated nozzles
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Withdrawn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
DE10256512A
Other languages
German (de)
Inventor
Richard Aust
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent 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
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Priority to DE10256512A priority Critical patent/DE10256512A1/en
Priority to EP03101009A priority patent/EP1364898A3/en
Publication of DE10256512A1 publication Critical patent/DE10256512A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/42—Jets
    • 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
    • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
    • 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

Landscapes

  • Paper (AREA)

Abstract

In a paper-making process a wet or dry web of paper or carton moves between two points during which it is subjected to tensile forces of up to approx. 1000 N/m. In lieu of prior art roller drums the web is esp. transported over one or more lines of supporting non-contact air jets (2). During passage over the jet the web is deflected through an angle of approx. up to 7. The jet is emitted from a side-jets in a hollow beam transverse to the direction of web motion. The jets (3, 4) are located along the beam receiving threshold and departure threshold. The jets are arrayed in two or more lines. One first row of jets is tilted against the direction of the oncoming web movement and the second row is tilted with the direction of web movement, forming an air cushion.

Description

Die Erfindung betrifft eine Einrichtung zur Führung einer laufenden Papier-, Karton-, oder anderen Faserstoffbahn in Maschinen zur Herstellung und/oder Veredelung der Faserstoffbahn, mit eingestellten Bahnzügen bis ca. 1000 N/m. The invention relates to a device for guiding a running paper, cardboard, or other fibrous web in machines for the production and / or finishing of Fibrous web, with adjusted web tension up to approx. 1000 N / m.

Derartige Einrichtungen sind erforderlich, um lange freie Bahnwege zu vermeiden. Such facilities are required to avoid long, empty railroad tracks.

Bei hohen Bahnzügen, das sind in der Regel ca. 1000 N/m erfolgt diese Führung mittels Leitwalzen. Hohe Bahnzüge erfordern allerdings Leitwalzen mit jeweils großem Durchmesser, die mit den entsprechenden Antrieben ausgerüstet, teuer und schwer handhabbar sind. This guidance is carried out for high train trains, which are usually approx. 1000 N / m by means of guide rollers. However, high web trains require guide rollers each large diameter, equipped with the appropriate drives, expensive and are difficult to handle.

Erfolgt der Einsatz im Nassbereich der Herstellungsmaschine oder auch im Anschluss an eine Beschichtung der Bahn mittels Streichfarbe, Leim oder Stärke, sind Ablagerungen auf den Leitwalzen unvermeidbar, wodurch sie ihrer Funktion dann nicht mehr gerecht werden können. Deshalb muss danach ein Reinigen dieser Leitwalzen erfolgen, was wiederum sehr aufwendig ist. Is it used in the wet area of the manufacturing machine or in the Connection to a coating of the web by means of coating color, glue or starch, deposits on the guide rollers are inevitable, which makes them function then can no longer do it justice. Therefore, cleaning them afterwards Guide rollers take place, which in turn is very complex.

Aufgabe der Erfindung ist es daher, eine Lösung anzugeben, mit der diese Nachteile vermeidbar sind. The object of the invention is therefore to provide a solution with which these disadvantages are avoidable.

Die Aufgabe wird durch die kennzeichnenden Merkmalen des Anspruches 1 gelöst. The object is achieved by the characterizing features of claim 1.

Mit der Erfindung sind lange gerade und daher instabile Laufwege vermeidbar. With the invention long and therefore unstable walking paths can be avoided.

Die Erfindung ist besonders geeignet für hohe Bahnzüge, wo ein leichter Polygonzug gegenüber einer geraden Bahnführung der Bahn mehr Stabilität verleihen soll. The invention is particularly suitable for high web trains where a light polyline should give the web more stability compared to a straight web guide.

Der dazu angegebene kleine Umschlingungswinkel von ca. 7° kann beispielsweise im Nassbereich der Papiermaschine die sonst üblichen Leitwalzen ersetzen. The indicated small wrap angle of approx. 7 ° can, for example, in Wet area of the paper machine replace the usual guide rollers.

Die Erfindung ist außerdem bei doppelseitig gestrichenen LWC-Papieren, gestrichenen Feinpapieren, aber auch bei Karton anwendbar. The invention is also in the case of double-sided coated LWC papers, coated fine papers, but also applicable to cardboard.

Vorteilhafte Ausgestaltungen der Erfindungen sind den kennzeichnenden Merkmalen der Unteransprüche zu entnehmen. Advantageous embodiments of the inventions are the characteristic features the subclaims.

Nachfolgend soll die Erfindung an Hand eines Ausführungsbeispieles erläutert werden. The invention will be explained below using an exemplary embodiment become.

Fig. 1 zeigt die erfindungsgemäße Tragdüse in teilweise geschnitten dargestellter Seitenansicht. Fig. 1 shows the carrying nozzle according to the invention in a partially sectioned side view.

Fig. 2 zeigt die Draufsicht auf die Tragdüse gemäß Fig. 1. FIG. 2 shows the top view of the carrying nozzle according to FIG. 1.

Zur berührungslosen Führung (zum Tragen bzw. Umlenken) einer laufenden Papierbahn 1 dient eine unterhalb der Papierbahn 2 angeordnete Tragdüse 2. Die Laufrichtung der Papierbahn 1 ist mit Pfeil L angegeben. A contact nozzle 2 arranged below the paper web 2 serves for contactless guidance (for carrying or deflecting) a running paper web 1 . The direction of travel of the paper web 1 is indicated by arrow L.

Diese Tragdüse ist aus Fig. 1 zu entnehmen und als kastenartiges, dünnwandiges Bauteil gestaltet. Die Tragdüse 2 erstreckt sich im Wesentlichen über die gesamte Breite der Papierbahn 1. This carrying nozzle can be seen in FIG. 1 and is designed as a box-like, thin-walled component. The carrying nozzle 2 extends essentially over the entire width of the paper web 1 .

Der zur Papierbahn 1 weisende obere Bereich der Tragdüse 2 ist derart geformt, dass an beiden Seiten der Tragdüse 2 jeweils zur Mittellinie gerichtete, schräge Fläche 2a und 2b entstehen, in die jeweils eine Reihe R1 von Lüftdüsen 3 und eine Reihe R2 von Luftdüsen 4 eingesetzt sind. The upper region of the support nozzle 2 facing the paper web 1 is shaped in such a way that on both sides of the support nozzle 2 there is an inclined surface 2 a and 2 b directed towards the center line, into each of which a row R 1 of air vents 3 and a row R 2 of air nozzles 4 are used.

In Fig. 2 sind diese Düsenreihen mit versetzt zueinander angeordneten Einzeldüsen deutlich sichtbar. In FIG. 2, these nozzle rows are clearly visible with mutually offset individual nozzles.

Man erkennt vor allem aus Fig. 1 die mit den einzelnen Pfeilen dargestellte Abstrahl- bzw. Ausströmcharakteristik der Düsen 3 sowie der Düsen 4. The radiating or outflow of the nozzle 3 and the nozzle 4 shown with the individual arrows can be seen especially in FIG. 1.

Damit wirken die Düsen 3 im Wesentlichen gegen die Laufrichtung der Bahn 1 und die Düsen 4 im Wesentlichen in Laufrichtung der Bahn. The nozzles 3 thus act essentially against the running direction of the web 1 and the nozzles 4 essentially in the running direction of the web.

Durch diese Ausrichtung der Luftstrahlen wird der gewünschte polygonal verlaufende Bahnzug mit seinem in der Mittellinie der Tragdüse 2 liegenden Scheitelpunkt S erreicht. This alignment of the air jets achieves the desired polygonal web path with its apex S lying in the center line of the support nozzle 2 .

Bis zum Scheitelpunkt S und von diesem aus weiter in stromabwärtiger Richtung läuft die Papierbahn 1 in relativ kleinem Umschlingungswinkel α, der ca. 7° beträgt, über die Trag- bzw. Umlenkdüse 2. Up to the apex S and from there further in the downstream direction, the paper web 1 runs in a relatively small wrap angle α, which is approximately 7 °, over the carrying or deflecting nozzle 2 .

Die zumeist noch feuchte Bahn wird dadurch nur wenig beansprucht, aber läuft sehr stabil. The track, which is usually still wet, is only used slightly, but runs very well stable.

Dies ist möglich trotz "rissanfälliger" hoher Bahnzüge, dessen Größe FZ ca. 1000 N/m betragen kann. This is possible in spite of the high train trains susceptible to cracking, the size F Z of which can be approximately 1000 N / m.

Es soll noch erwähnt sein, dass die Strahlrichtung der einzelnen Düsen 3 und 4 der Reihen R1 und R2 jeweils getrennt voneinander einstellbar sind. Diese Möglichkeit ist beispielhaft in Fig. 2 mit E für "Einstellung" eingezeichnet. It should also be mentioned that the jet direction of the individual nozzles 3 and 4 of the rows R 1 and R 2 can each be set separately from one another. This possibility is shown by way of example in Fig. 2 with E for "setting".

Nachzutragen ist, dass anstelle der in Reihen angeordneten Lochdüsen 3 und 4 auch Schlitze denkbar wären. Im Beispiel wurden Lochdüsen deshalb vorgeschlagen, weil diese einfacher fertigbar und einstellbar sind. It should be added that instead of the perforated nozzles 3 and 4 arranged in rows, slots would also be conceivable. In the example, perforated nozzles were proposed because they are easier to manufacture and adjust.

Außerdem ist deren Turbulenzgrad höher. Auch ist ein 70% höherer Wärmeübergang erreichbar und darüber hinaus wird ca. 30% weniger Luft gegenüber denkbaren Schlitzen benötigt. In addition, their degree of turbulence is higher. Also is a 70% higher Heat transfer achievable and in addition there is approximately 30% less air compared to possible slots.

Claims (5)

1. Einrichtung zur Führung einer laufenden Papier-, Karton-, oder anderen Faserstoffbahn in Maschinen zur Herstellung und/oder Veredelung der Faserstoffbahn, mit eingestellten Bahnzügen bis ca. 1000 N/m gekennzeichnet, dadurch, dass als Bahnführungselement anstelle einer an sich bekannten Leitwalze eine berührungslos arbeitende Tragdüse (2) vorgesehen ist, mit der die Bahn (1) polygonartig umlenkbar ist. 1. Device for guiding a running paper, cardboard, or other fibrous web in machines for producing and / or refining the fibrous web, characterized with set web tension up to about 1000 N / m, characterized in that as a web guide element instead of a guide roller known per se a contactless working support nozzle ( 2 ) is provided, with which the web ( 1 ) can be deflected like a polygon. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Tragdüse (2) kastenartig aufgebaut und mit Druckluft derart beaufschlagbar ist, dass zwischen der Tragdüse (2) und der laufenden Bahn (1) ein Druckpolster besteht. 2. Device according to claim 1, characterized in that the support nozzle ( 2 ) is constructed in a box-like manner and can be acted upon with compressed air in such a way that a pressure cushion exists between the support nozzle ( 2 ) and the running web ( 1 ). 3. Einrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Tragdüse (2) wenigstens zwei Reihen (R1, R2) von Lochdüsen (3, 4) zur Ausbildung des Druckpolsters und eines Umschlingungswinkels α der Bahn (1) um die Tragdüse von ca. 7° aufweist. 3. Device according to claim 1 and 2, characterized in that the support nozzle ( 2 ) at least two rows (R 1 , R 2 ) of perforated nozzles ( 3 , 4 ) to form the pressure cushion and a wrap angle α of the web ( 1 ) around Carrier nozzle of approximately 7 °. 4. Einrichtung nach Anspruch 1-3, dadurch gekennzeichnet, dass die Lochdüsen (3) über die gesamte Länge der Tragdüse (2) reichen, wobei die Lochdüsen (3) der Reihe (R1) versetzt zu den Lochdüsen (4) der anderen Reihe (R2) angeordnet sind. 4. Device according to claims 1-3, characterized in that the perforated nozzles ( 3 ) extend over the entire length of the support nozzle ( 2 ), the perforated nozzles ( 3 ) of the row (R 1 ) being offset from the perforated nozzles ( 4 ) of the other Row (R 2 ) are arranged. 5. Vorrichtung nach Anspruch 3 und 4, dadurch gekennzeichnet, dass die Lochdüsen (3) der Reihe (R1) eine Abstrahlrichtung im Wesentlichen gegen die Laufrichtung der Bahn und die Lochdüsen (4) der Reihe (R2) eine Abstrahlrichtung im Wesentlichen in Laufrichtung der Bahn (1) aufweisen. 5. The device according to claim 3 and 4, characterized in that the perforated nozzles ( 3 ) of the row (R 1 ) have a radiation direction substantially against the running direction of the web and the perforated nozzles ( 4 ) of the row (R 2 ) have a radiation direction substantially Have running direction of the web ( 1 ).
DE10256512A 2002-05-07 2002-12-04 Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact Withdrawn DE10256512A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10256512A DE10256512A1 (en) 2002-05-07 2002-12-04 Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact
EP03101009A EP1364898A3 (en) 2002-05-07 2003-04-15 Device for guiding a running web of paper, carton, or another fibrous material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10220449 2002-05-07
DE10256512A DE10256512A1 (en) 2002-05-07 2002-12-04 Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact

Publications (1)

Publication Number Publication Date
DE10256512A1 true DE10256512A1 (en) 2003-11-20

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DE10256512A Withdrawn DE10256512A1 (en) 2002-05-07 2002-12-04 Moving wet paper or carton web is supported by two transverse lines of air jets emitted from a single jet beam without physical contact

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343949A1 (en) * 2003-09-23 2005-04-28 Voith Paper Patent Gmbh Assembly to guide and/or dry a moving web, of paper or cardboard and the like, has a hollow jet beam with jets to form a pressure cushion and an acoustic damper lining on the inner wall surfaces to reduce noise emissions

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941325A1 (en) * 1978-10-12 1980-04-30 Grace W R & Co PNEUMATIC SUPPORT ARRANGEMENT FOR SUPPORTING A RUNNING TRAIN
DE2941324A1 (en) * 1978-10-12 1980-04-30 Grace W R & Co PNEUMATIC SUPPORT TO KEEP A RUNNING TRACK
DE3111744C2 (en) * 1980-03-28 1987-06-25 Valmet Oy, Helsinki, Fi
DE3904774C1 (en) * 1989-02-17 1990-05-17 Hilmar 5653 Leichlingen De Vits
DE4306584C1 (en) * 1993-03-03 1994-07-07 Langbein & Engelbrecht Device for the floating guidance of a material web
DE69601960T2 (en) * 1995-02-10 1999-10-28 Valmet Corp Method and device for the contactless treatment of a material web
DE19821542C2 (en) * 1998-05-14 2000-05-11 Langbein & Engelbracht Gmbh Blow box

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941325A1 (en) * 1978-10-12 1980-04-30 Grace W R & Co PNEUMATIC SUPPORT ARRANGEMENT FOR SUPPORTING A RUNNING TRAIN
DE2941324A1 (en) * 1978-10-12 1980-04-30 Grace W R & Co PNEUMATIC SUPPORT TO KEEP A RUNNING TRACK
DE3111744C2 (en) * 1980-03-28 1987-06-25 Valmet Oy, Helsinki, Fi
DE3904774C1 (en) * 1989-02-17 1990-05-17 Hilmar 5653 Leichlingen De Vits
DE4306584C1 (en) * 1993-03-03 1994-07-07 Langbein & Engelbrecht Device for the floating guidance of a material web
DE69601960T2 (en) * 1995-02-10 1999-10-28 Valmet Corp Method and device for the contactless treatment of a material web
DE19821542C2 (en) * 1998-05-14 2000-05-11 Langbein & Engelbracht Gmbh Blow box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343949A1 (en) * 2003-09-23 2005-04-28 Voith Paper Patent Gmbh Assembly to guide and/or dry a moving web, of paper or cardboard and the like, has a hollow jet beam with jets to form a pressure cushion and an acoustic damper lining on the inner wall surfaces to reduce noise emissions

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: VOITH PATENT GMBH, 89522 HEIDENHEIM, DE

8141 Disposal/no request for examination