EP0826820A2 - Machine pour la fabrication d'une bande - Google Patents

Machine pour la fabrication d'une bande Download PDF

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Publication number
EP0826820A2
EP0826820A2 EP97111682A EP97111682A EP0826820A2 EP 0826820 A2 EP0826820 A2 EP 0826820A2 EP 97111682 A EP97111682 A EP 97111682A EP 97111682 A EP97111682 A EP 97111682A EP 0826820 A2 EP0826820 A2 EP 0826820A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
machine according
guiding device
air
air guiding
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Withdrawn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
EP97111682A
Other languages
German (de)
English (en)
Other versions
EP0826820A3 (fr
Inventor
Markus Oechsle
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 Sulzer Papiermaschinen GmbH
Voith Sulzer Papiertechnik 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 Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0826820A2 publication Critical patent/EP0826820A2/fr
Publication of EP0826820A3 publication Critical patent/EP0826820A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices

Definitions

  • the invention relates to a machine for manufacturing a material web, especially paper or Cardboard web according to the preamble of claim 1.
  • Machines of the type mentioned here are known. They comprise a number of cylinders around which a material web together with a conveyor belt meandering to be led.
  • the web and the Conveyor belt is in the transfer area between air cylinders assigned to two cylinders, which prevent the web from fluttering should reduce.
  • the air control device has relatively large structural dimensions, so on the one hand their costs are increased and on the other hand the machine for the production of the material web has an increased overall length.
  • As a disadvantage has also proven that the assembly of the Air guiding device through their often difficult to access Position within the machine difficult is.
  • a machine is proposed the features mentioned in claim 1 having.
  • the size of the neither of the web free circumferential area still wrapped by the conveyor belt, so its arc length is from that Arrangement of the previous viewed in the machine direction and the subsequent cylinder.
  • the fact that the air guide only over a portion of the free peripheral area extends or covers it, is the accessibility of the air guiding device improved within the machine as a result Assembly and maintenance work very easily possible are. This also makes it possible created the length of the machine to manufacture reduce the material web by the through the narrow construction air guiding device gained installation space the distance between the cylinders is used to reduce each other.
  • An embodiment of the machine is preferred, which is characterized by the fact that one remaining free peripheral area spanning Coverage is in place.
  • the cylinder to which the Air guide is assigned points to it Perforations or recesses on the outer surface and is connected to a vacuum source.
  • the cover shields the suction area from the environment and thus reduces that of volume of false air drawn into the aspirated cylinder, whereby the to be applied for the generation of negative pressure Performance of the associated with the cylinder Vacuum device can be relatively small.
  • the Operating costs of the machine are reduced due to the Power consumption of the vacuum device decreased.
  • the air guide is a multi-part Has housing, a first housing part the air guiding device preferably with a Pressure can be applied and a second Housing part has a wall that faces the outer surface adapted to a cylinder and essentially is concave.
  • an embodiment of the machine which is characterized in that the Housing parts are arranged so that each other a gap is formed between you by the air is discharged from the transfer area becomes.
  • the gap preferably has a flow direction viewed in the air - diverging Course on, leading to an enhanced nozzle effect leads, that is, from the first housing part Blown air escaping and directed into the gap a negative pressure develops within the gap, which sucks the air in the transfer area and thus a safe transfer of the material web in the area of the free running distance between the cylinders.
  • the machine described below can be general for the production of a continuous material web be used. Purely exemplary is in following assumed that it was a Machine for the production of a paper web, i.e. around is a paper making machine.
  • the figure shows a section of a paper making machine 1, which comprises a number of cylinders, of which only cylinders 3 to 7 are shown.
  • cylinders 3 and 5 it can for example, drying cylinders of a dryer section act.
  • a paper web 9 together with one as Dryer, felt or support tape Conveyor belt 11 passed around.
  • the paper web lies there 9 on the outer surface of cylinders 3 and 5 on.
  • the one between cylinders 3 and 5 -in vertical Direction viewed - staggered downwards Cylinder 7 is here as one with negative pressure acted upon guide roller to which the Paper web 9 is guided around outside.
  • the cylinder 7 also be designed as a drying cylinder.
  • the air guiding device 13 points here a multi-part housing 15.
  • a Air squeegee 19 arranged from a Felt strips or consist of a plastic brush can.
  • the air wiper strip 19 is used for wiping that carried by the conveyor belt 11 Air boundary layer.
  • an air scraper / knife can also be provided be the one carried by the conveyor belt 11 Air layer by means of a on the conveyor belt 11th blows directed air jet.
  • a channel-like feed line 21 arranged here with a not Blown air source shown is connected. From the lead 21 emerging air flow is through Arrows 22 indicated.
  • a passage opening 24 introduced from which the inside of the first Housing part 17 located, under pressure Air can escape.
  • a second housing part 23 of the air guiding device 13 is arranged here on the outer surface of the cylinder 7 and partially covers its free peripheral area. Under the free circumference is in following the part of the peripheral surface of a cylinder to understand that neither of the paper web 9 is still wrapped in the conveyor belt 11.
  • the wall 26 facing the outer surface of cylinder 7 of the second housing part 23 has one adapted to the outer surface of the cylinder 7 Contour on, so that between the wall 26 and the Outside surface of the cylinder 7 formed space 20 is relatively uniform and small can be.
  • the cylinder 7 as a suction guide roller trained and distributed over its circumference arranged recesses, not shown here, for example, holes on which Penetrate the wall and connect the Outer surface of the cylinder 7 to the interior create.
  • the cylinder 7 is preferably over one of its front bearing journal with one here vacuum source not shown connected.
  • the Negative pressure spreads starting from the interior the recesses up to the outer surface of the Cylinder 7 out.
  • the paper web and that porous conveyor belt mainly in the wrapped Circumferential area tightened and stabilized so that a lifting and fluttering of the paper web during the Rotation of the cylinder 7 is prevented.
  • the negative pressure can also be on the outside of the cylinder 7 are applied, for example via the air guiding device 13 or via its second housing part 23, which with a Vacuum source is connected.
  • the effective range of the vacuum down to the overflow and drain gusset of the cylinder 7 extend.
  • the wall 26 of the second housing part 23 partially covers the free circumferential area, whereby the false air intake, that is, the intake of false air volume is reduced.
  • the air guide 13 or in this embodiment of the air guiding device the wall 26 of the second housing part 23 covers 30% to 70%, in particular 35% to 60%, preferably 55% of the free peripheral area of the cylinder 7.
  • the two housing parts 17 and 23 are apart spaced apart and form a gap 28 between them through which the in the area of the gusset 27 of cylinder 7 and those in the transfer area air from cylinder 3 to cylinder 7 is discharged becomes.
  • the paper web 9 is thus in the area the free running track stabilized to a To prevent web flutter, causing a demolition of the Paper web can be practically excluded.
  • the housing parts 17 and 23 of the air guiding device 13 are by means of web tigers only indicated here Spacers 29 connected together. Vary by the length of the spacers 29 is that Size and the course of the gap 28 adjustable. In this embodiment, the gap opens 28 in the direction of flow (arrow 25).
  • the spreading the air from the overrun gusset 27 of the cylinder 7 as well as from the transfer area between the cylinders 3 and 7 is done by forming a vacuum in the Gap 28. This is the from the passage opening 24 of the first housing part 23 exiting blown air 22 directed or directed into the gap 28 and flows out of the air guiding device in the direction of arrow 25 out. Within the gap 28 a negative pressure forms, due to which the Air from the transfer area and the overrun gusset 27 entrained and sucked. In order to entraining the air between the conveyor belt 11 or the paper web 9 and the cylinder 7 prevents the lifting of the Paper web can lead, as well as their run in the area the free running distance between the cylinder 3 and the cylinder 7 stabilized.
  • first housing part 17 arranged supply line 21 with a vacuum source to connect and one facing the transfer area Boundary wall 30 of the air guiding device to be at least partially permeable to air. This allows the air to escape directly from the transfer area the paper making machine will.
  • the cover 31 thus covers the recesses or perforations of the cylinder 7 through which the negative pressure applied to its outer / outer surface becomes. It is preferably provided in the interior of the Cylinder 7 to arrange a cover that the recesses in the cylinder wall in the area of the free peripheral area partially or completely covered. This cover can be in addition to or instead of the cover 31 and / or the wall 26 of the second housing part 23 of the air guiding device 13 be provided.
  • the cover 31 is made of an airtight material manufactured and extends cross-machine direction considered- across the entire width the machine. As can be seen from Figure 1, the Cover 31 by struts 33 at a distance arranged to the lateral surface 35 of the cylinder 7 so that a gap 37 is formed. The struts 33 are on the leading side of the machine attached to the production of the paper web 9. Further struts, not visible in this sectional view, that hold the cover 31 are arranged on the drive side of the machine.
  • the cover 31 here has an arcuate to which Contour of the lateral surface 35 of the cylinder 7 adapted Contour on so that there is an even Gap 37 results.
  • the left end 39 of the cover 31 abuts or borders directly here the second housing part 23 of the air guiding device 13 on.
  • the right end 41 of the cover 31 extends directly up to that of cylinder 7 running conveyor belt 11, but no contact consists.
  • a sealing strip can be provided, the bears against the conveyor belt 11 abuts this, or the right end is 41 designed in such a way that even the -here are not illustrated sealing strip forms.
  • the cover 31 can be formed in one piece. Preferably it is provided that the cover 31 consists of several parts Manufacture (segments) that are interconnected are.
  • the machine direction is considered - length of the air guiding device 13 smaller than in this embodiment the clear distance between cylinders 3 and 5.
  • this can simply go up are brought out of the machine.
  • the compact air guiding device 13 possible the distance between cylinders 3 and 5 and thus the length of the paper making machine to zoom out.
  • the first Housing part 17 forms a universally applicable Basic body that practically in every transfer area between two cylinders inside the paper making machine can be used.
  • the second housing part 23 can, depending on the place of use, for example the diameter of the cylinder, to which the air guiding device is assigned and / or the free peripheral area to be covered, be adjusted.
  • the variety of the Air guiding device 13 can thus be significantly reduced on the one hand, the cost of their Manufacturing lowers and on the other hand the storage effort or inventory reduced.
  • FIG. 13 Another embodiment is shown in FIG the air guide 13, which here as Suction box 43 is formed in the transfer area between a cylinder 3 and a cylinder 7 is arranged.
  • Suction box 43 is formed in the transfer area between a cylinder 3 and a cylinder 7 is arranged.
  • Parts that match those in Figure 1 match, are with the same reference numerals provided so that for their description of Figure 1 can be referred. In the following only to the differences from that shown in Figure 1 Embodiment of the air guide closer To be received.
  • the air guiding device 13 comprises, ie the suction box 43, a housing 45 which with a vacuum source not shown here connected is.
  • a housing 45 which with a vacuum source not shown here connected is.
  • Wall 26 of the housing 45 is on the contour adapted to the lateral surface 35.
  • a boundary wall 30 of the suction box 43 has a number distributed arranged openings through which the negative pressure in the housing 45 on the conveyor belt 11 and the paper web 9 is guided. This will be like described above - the paper web 9 and that Conveyor belt 11 while passing through the transfer area stabilized.
  • Particularly preferred an embodiment of the suction box 43, in which the wall 26 also like the boundary wall 30, has openings that into the interior of the Guide suction box 43. This can create a vacuum applied to the outer surface 35 of the cylinder 7 be, so that an additional suction of the here cylinder 7 designed as a guide roller is dispensed with can be.
  • a cover 31 is provided which covers the remaining not covered by the suction box 43 free circumferential area of the cylinder 7 compared to the Seals around the machine.
  • the construction and the Arrangement of the cover 31 matches the structure Arrangement of the cover described in Figure 1 agree, so that here no further details is received.
  • Air guiding device as shown in FIGS. 1 and 2, both in a dryer section as well as in a press section of the machine be used to manufacture the paper web can.
  • the air guiding device serves on the one hand for Web stabilization and on the other hand to cover the free peripheral area of the suction guide roller or the cylinder 7.
  • To minimize the false air intake is advantageously always a cover 31 the peripheral portion of the cylinder 7 assigned, which is neither of the conveyor belt, the Paper web still covered the air guide is, which reduces the operating costs of the machine Production of the material web are reduced.

Landscapes

  • Advancing Webs (AREA)
  • Replacement Of Web Rolls (AREA)
EP97111682A 1996-08-29 1997-07-10 Machine pour la fabrication d'une bande Withdrawn EP0826820A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19634914 1996-08-29
DE19634914A DE19634914A1 (de) 1996-08-29 1996-08-29 Maschine zur Herstellung einer Materialbahn

Publications (2)

Publication Number Publication Date
EP0826820A2 true EP0826820A2 (fr) 1998-03-04
EP0826820A3 EP0826820A3 (fr) 1999-02-10

Family

ID=7804010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111682A Withdrawn EP0826820A3 (fr) 1996-08-29 1997-07-10 Machine pour la fabrication d'une bande

Country Status (3)

Country Link
US (1) US6115938A (fr)
EP (1) EP0826820A3 (fr)
DE (1) DE19634914A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062330A1 (de) * 2004-12-20 2006-06-22 Tlt-Turbo Gmbh Vorrichtung zum Absaugen einer wandnahen Luftgrenzschicht

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19902138A1 (de) * 1999-01-20 2000-07-27 Voith Sulzer Papiertech Patent Vorrichtung zur Behandlung einer Materialbahn
DE10226629A1 (de) * 2002-06-14 2003-12-24 Voith Paper Patent Gmbh Vorrichtung zur Behandlung einer Faserstoffbahn
FI20022231A0 (fi) * 2002-12-19 2002-12-19 Metso Paper Inc Järjestely kudoksen yhteydessä radan stabiloimiseksi

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538623A1 (de) * 1984-10-30 1986-05-07 Maschinenfabrik Andritz Ag, Graz Vorrichtung zum trocknen von materialbahnen, insbesondere papierbahnen
DE3922361A1 (de) * 1989-07-07 1991-01-17 Voith Gmbh J M Verfahren und vorrichtung zum trocknen einer materialbahn
EP0415460A2 (fr) * 1989-09-01 1991-03-06 Valmet Paper Machinery Inc. Appareil dans la section de sÀ©chage d'une machine à papier
EP0447385A1 (fr) * 1990-03-16 1991-09-18 Valmet Paper Machinery Inc. Jet aspirant dans la zone de traction de la toile métallique individuelle dans la section de séchage de machine à papier ou similaire
DE4141296A1 (de) * 1991-12-14 1993-06-17 Voith Gmbh J M Vorrichtung zur abnahme einer bahn von einem trockenzylinder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE50303T1 (de) * 1986-04-08 1990-02-15 Beloit Corp Blaskasten fuer trockner.
DE3739338C2 (de) * 1987-11-20 1995-09-07 Voith Gmbh J M Luftleitkasten zum Stabilisieren des Laufs einer Warenbahn, insbesondere einer Papierbahn
US4821429A (en) * 1987-11-30 1989-04-18 J. M. Voith, Gmbh Air guide box for stabilizing the run of a web, for instance a paper web
DE4016921C2 (de) * 1989-07-07 1994-04-07 Voith Gmbh J M Vorrichtung zum Trocknen einer Materialbahn
US5515619A (en) * 1993-08-06 1996-05-14 J.M. Voith Gmbh Flexibly mounted sealing strips of a vacuum roll for a web dryer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538623A1 (de) * 1984-10-30 1986-05-07 Maschinenfabrik Andritz Ag, Graz Vorrichtung zum trocknen von materialbahnen, insbesondere papierbahnen
DE3922361A1 (de) * 1989-07-07 1991-01-17 Voith Gmbh J M Verfahren und vorrichtung zum trocknen einer materialbahn
EP0415460A2 (fr) * 1989-09-01 1991-03-06 Valmet Paper Machinery Inc. Appareil dans la section de sÀ©chage d'une machine à papier
EP0447385A1 (fr) * 1990-03-16 1991-09-18 Valmet Paper Machinery Inc. Jet aspirant dans la zone de traction de la toile métallique individuelle dans la section de séchage de machine à papier ou similaire
DE4141296A1 (de) * 1991-12-14 1993-06-17 Voith Gmbh J M Vorrichtung zur abnahme einer bahn von einem trockenzylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062330A1 (de) * 2004-12-20 2006-06-22 Tlt-Turbo Gmbh Vorrichtung zum Absaugen einer wandnahen Luftgrenzschicht

Also Published As

Publication number Publication date
US6115938A (en) 2000-09-12
DE19634914A1 (de) 1998-03-05
EP0826820A3 (fr) 1999-02-10

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