WO2006117260A1 - Presse à fente longitudinale - Google Patents

Presse à fente longitudinale Download PDF

Info

Publication number
WO2006117260A1
WO2006117260A1 PCT/EP2006/060719 EP2006060719W WO2006117260A1 WO 2006117260 A1 WO2006117260 A1 WO 2006117260A1 EP 2006060719 W EP2006060719 W EP 2006060719W WO 2006117260 A1 WO2006117260 A1 WO 2006117260A1
Authority
WO
WIPO (PCT)
Prior art keywords
roll
press
nip
extended
diameter
Prior art date
Application number
PCT/EP2006/060719
Other languages
German (de)
English (en)
Inventor
Andreas Meschenmoser
Thomas Augscheller
Peter Mirsberger
Andreas SCHÜTTE
Original Assignee
Voith 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36177817&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2006117260(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to JP2008508177A priority Critical patent/JP4935809B2/ja
Priority to EP06708764A priority patent/EP1880055B1/fr
Priority to DE502006002264T priority patent/DE502006002264D1/de
Publication of WO2006117260A1 publication Critical patent/WO2006117260A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to an extended-nip press for dewatering a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same, consisting of a press roll with a flexible roll shell and a pressing element with a concave pressing surface which the roll shell for Forming an extended press nip presses to a cylindrical counter roll, wherein the diameter of the press roll is less than 1 m.
  • Such presses are often used in conversions and can replace conventional presses because of the small space required.
  • the object of the invention is therefore to reduce the burden of the flexible roll shell with the smallest possible space requirement of the press arrangement.
  • this object is achieved in that the diameter of the counter roll is less than 1, 4 m and the ratio between the length of the pressing surface in the web running direction and the diameter of the press roll is greater than 0.08 and / or the press roll counter-roll at the end of each roll at least 25 cm surmounted.
  • the diameter of the counter roll should not exceed a diameter of 1, 4 m because of the space required and the weight. He should, however - 2 -
  • the load on the roll shell of the press roll as a result of the deformation in the press nip area is further reduced if the diameter of the press roll is smaller than the diameter of the counter roll, as a result results in a lower convex curvature of the press nip in the web running direction.
  • the average pressing pressure in the press nip should be greater than 2 MPa, preferably greater than 3 MPa and in particular greater than 4 MPa.
  • the pressing surface in the web running direction has a length of more than 80 mm, preferably more than 100 mm. - 3 -
  • the pressing surface in the web running direction has a length of more than 140 mm, preferably more than 160 mm.
  • the advantages of the invention are obtained especially in presses in which the width of the press roll is less than 7.5 m, preferably less than 6.8 m and in particular less than 5.5 m ,
  • the reduced load on the roll mantle results in the press roll, i. her roll mantle only only at most 1, 4 m, preferably at most 1 m wider than the counter roll, i. whose lateral surface must be.
  • the roll mantle of the press roll should project axially beyond the mantle surface of the mating roll by at least 300 mm, preferably by at least 350 mm.
  • FIG. 1 shows a schematic cross section through an extended-nip press
  • FIG. 2 shows a side view of the extended nip press
  • FIG. 3 shows a representation of the pressure-pressure profile in the extended nip.
  • the extended press nip for dewatering a fibrous web 1, in particular a paper web in a paper machine, is formed by a cylindrical counter-roller 5 and a press roller 4 arranged above it.
  • the roller axles are mounted on both sides in a roller frame 10.
  • the fibrous web 1 passes through the press nip here by way of example together with a respective dewatering belt 2, 3 in the form of a press felt on both sides.
  • Dewatering belts 2, 3 take up a large part of the water pressed in the press nip from the fibrous web 1 and transport it out of the press nip.
  • the press roll 4 has a flexible roll shell 9 made of fiber-reinforced plastic, which is pressed by a hydraulic pressing element 6 with a concave pressing surface to the counter roll 5.
  • the pressing member 6 is formed as an axially extending press shoe.
  • the counter roll 5 has a diameter of 1 m.
  • the pressing surface of the pressing element 6 has in the web running direction 11 has a length L of about 160 mm, so that the ratio between this length L and the diameter of the press roll 4 is 0.2.
  • the thus-dimensioned extended-nip press is a very compact press unit and is therefore ideal for the replacement of conventional press units with a short press nip.
  • the axis of rotation 8 of the roll mantle 9 of the press roll 4 is offset by an amount a against the web running direction 11 to the press plane 7 passing through the supports of the press roll 4 and the mating roll 5.
  • the pressing pressure at the inlet of the press nip should gradually rise to a maximum and then drop suddenly from there to the outlet.
  • the width of the press roll 4 is about 6.5 m, which has a low deflection of the backing roll 5 result.
  • the roll mantle 9 Since the ends of the flexible roll mantle 9 of the press roll 4 are supported by cylindrical side windows 12, the roll mantle 9 requires a transition region from the concave shape of the press nip to the circular shape of the side window 12 shown in FIG.
  • This transition is also referred to as guy length h, b and corresponds to the length by which the roll shell 9 of the press roll 4 projects axially beyond the mantle surface of the counter roll 5.
  • This guy length li, I 2 can be the same or different lengths.
  • the press roll 4 projects beyond the counter roll 5 on both sides by the same length U, I 2 of approximately 30 cm, so that the press roll 4 is 0.6 m longer than the counter roll 5.

Landscapes

  • Paper (AREA)
  • Sealing Material Composition (AREA)

Abstract

L'invention concerne une presse à fente longitudinale pour assécher des bandes (1) de papier, de carton, de tissu ou d'autres matières fibreuses dans une machine de production et/ou de traitement de ces matières. La presse comprend un rouleau presseur (4) doté d'un bandage souple (9) et d'un élément de pression (6) à surface de pression concave, cet élément comprimant le bandage souple (9) contre un cylindre antagoniste (5) pour former une fente de pression prolongée, le diamètre du rouleau presseur (4) étant inférieur à 1 m. L'invention vise à réduire la charge exercée sur le bandage souple (9). A cet effet, le diamètre du cylindre antagoniste (5) est inférieur à 1,4 m et le rapport entre la longueur (L) de la surface de pression dans le sens d'avancement de la bande (11) et le diamètre du rouleau presseur (4) est supérieur à 0,08 et/ou le rouleau compresseur (4) dépasse le cylindre antagoniste (5) d'au moins 25 cm à l'extrémité du rouleau.
PCT/EP2006/060719 2005-04-30 2006-03-15 Presse à fente longitudinale WO2006117260A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008508177A JP4935809B2 (ja) 2005-04-30 2006-03-15 長いニッププレス
EP06708764A EP1880055B1 (fr) 2005-04-30 2006-03-15 Presse a sabot
DE502006002264T DE502006002264D1 (de) 2005-04-30 2006-03-15 Langspaltpresse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005020218.7 2005-04-30
DE102005020218A DE102005020218A1 (de) 2005-04-30 2005-04-30 Langspaltpresse

Publications (1)

Publication Number Publication Date
WO2006117260A1 true WO2006117260A1 (fr) 2006-11-09

Family

ID=36177817

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/060719 WO2006117260A1 (fr) 2005-04-30 2006-03-15 Presse à fente longitudinale

Country Status (5)

Country Link
EP (1) EP1880055B1 (fr)
JP (1) JP4935809B2 (fr)
AT (1) ATE416273T1 (fr)
DE (2) DE102005020218A1 (fr)
WO (1) WO2006117260A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0859081A2 (fr) * 1997-02-12 1998-08-19 Voith Sulzer Papiermaschinen GmbH Appareil de pressage pour déshumidifier ou satiner une bande fibreuse
US6254728B1 (en) * 1997-01-24 2001-07-03 Loith Sulzer Papiermaschinen Gmbh Method and machine for manufacturing a fibrous pulp web
US20020179270A1 (en) * 2001-06-01 2002-12-05 Gustafson Eric J. Shoe press belt with system for detecting operational parameters
WO2004088229A1 (fr) * 2003-03-31 2004-10-14 Pmt Italia S.P.A. Presse concue pour retirer de l'eau d'une bande

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028480A1 (de) * 2004-06-11 2006-01-05 Eduard Küsters Maschinenfabrik GmbH & Co. KG Vorrichtung zum Bilden eines Langspalts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6254728B1 (en) * 1997-01-24 2001-07-03 Loith Sulzer Papiermaschinen Gmbh Method and machine for manufacturing a fibrous pulp web
EP0859081A2 (fr) * 1997-02-12 1998-08-19 Voith Sulzer Papiermaschinen GmbH Appareil de pressage pour déshumidifier ou satiner une bande fibreuse
US20020179270A1 (en) * 2001-06-01 2002-12-05 Gustafson Eric J. Shoe press belt with system for detecting operational parameters
WO2004088229A1 (fr) * 2003-03-31 2004-10-14 Pmt Italia S.P.A. Presse concue pour retirer de l'eau d'une bande

Also Published As

Publication number Publication date
EP1880055A1 (fr) 2008-01-23
DE102005020218A1 (de) 2006-11-09
JP2008540851A (ja) 2008-11-20
ATE416273T1 (de) 2008-12-15
DE502006002264D1 (de) 2009-01-15
EP1880055B1 (fr) 2008-12-03
JP4935809B2 (ja) 2012-05-23

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