EP1795649B1 - Rouleau pour machine à papier - Google Patents

Rouleau pour machine à papier Download PDF

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Publication number
EP1795649B1
EP1795649B1 EP06122408A EP06122408A EP1795649B1 EP 1795649 B1 EP1795649 B1 EP 1795649B1 EP 06122408 A EP06122408 A EP 06122408A EP 06122408 A EP06122408 A EP 06122408A EP 1795649 B1 EP1795649 B1 EP 1795649B1
Authority
EP
European Patent Office
Prior art keywords
sealing strip
pressure
suction box
sealing
suction
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.)
Active
Application number
EP06122408A
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German (de)
English (en)
Other versions
EP1795649A1 (fr
Inventor
Herbert Weinberger
Christoph Klarer
Karl Heinzl
Rainer Kloibhofer
Erwin Gutlederer
Ferdinand Schmatz
Josef Kerschbaumer
Alexander Studentschnig
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1795649A1 publication Critical patent/EP1795649A1/fr
Application granted granted Critical
Publication of EP1795649B1 publication Critical patent/EP1795649B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F3/10—Suction rolls, e.g. couch rolls

Definitions

  • the invention generally relates to a blowing or suction roll of a machine for producing and / or finishing a paper, cardboard, tissue or another material web, in particular fibrous web, with a rotatable, perforated roll shell and a pressure or suction box, with a Overpressure source or a vacuum source is connected.
  • the present invention relates to a method of manufacturing a pressure or suction box for such a blowing or suction roll.
  • blowing or suction rolls in paper machines.
  • Such rollers have a perforated lateral surface on which zones are formed by the pressure or suction box with an overpressure or a negative pressure.
  • the pressure or suction box is usually stationary, whereas the roll shell is rotated over the box.
  • the former or the headbox
  • the press section and the dryer section and other areas come into consideration.
  • the pressure or suction boxes are usually arranged radially within the rotating roll shell over the entire or substantially the entire axial length of the roll shell and are provided with sealing strips which are pressed to seal the pressure zones or suction zones on the roll shell from the inside against the same or with be positioned at a predetermined small distance from this.
  • different zones can be formed with mutually different pressures on the roll shell, which are sealed by one or more corresponding sealing strips against each other in the rule.
  • the sealing surfaces of the sealing strips or the bearing surfaces of sealing surface holders, by which the sealing strips are held, for example, on the suction box and after its assembly relative to the roll shell, are conventionally carried out as flat as possible to a uniform sealing strip spacing against the inner surface of the roll shell or a uniform pressing of the sealing strips against to reach the inner surface of the roll mantle.
  • This uniform spacing or the uniform contact pressure counteracts the phenomenon that with long rollers and thus correspondingly axially extending suction boxes a deflection of the suction box adjusts, which is severely limited in terms of still sufficient sealing or a maximum permissible sealing strip wear, for example seven millimeters. If the specified distance is exceeded, a uniform seal is no longer possible or the sealing strips wear out unevenly and quickly.
  • a suction box for the suction cylinder of a paper machine known which is provided with fixed, arranged in the longitudinal direction sealing strips, which are in contact with the cylinder jacket, and with a side member.
  • the side member is only on his. Attached ends to the suction box and carries another longitudinally disposed suction chamber, which in turn communicates with the main suction chamber, one of the boundary surfaces of this further chamber being closer to the sealing edges at the mouth of the main suction chamber is formed by a wall of the suction box itself, while the other boundary surface, which is further away from the sealing edges of the main suction chamber, is longitudinally connected to the longitudinal beam.
  • a sealing device for a suction box of a suction roll known.
  • axial seals are provided, which are arranged in recesses in a holding part.
  • the holding member is arranged to assume a variable position with respect to the suction box and displaceable in an opening in the upper portion of the suction box.
  • the invention has for its object to provide a method for producing a pressure or suction box for a paper machine roll or the like, through which said problems of bending of the printing or Suction box are overcome without significantly increasing the cost of production. Furthermore, a blow or suction roll of a paper machine or the like should be specified, which has a correspondingly produced pressure or suction box.
  • suction box for a suction roll of a paper machine.
  • the invention is also applicable to printing boxes for blow rolls and other machines for the production of a material web, in particular fibrous web.
  • the box will hereinafter be referred to as a suction box and the roller as a suction roller, which are connected to a vacuum source.
  • the inventive method is used to produce a suction box for a suction roll of a paper machine or the like, wherein the suction roll comprises a rotatable, perforated roll shell and in the mounted state, the suction box to form in the known manner, one or more suction zones on the roll shell. Accordingly, the suction box is connected to a vacuum source and associated with the roll shell so that it applies a predetermined area with a negative pressure on the inner surface of the roll shell.
  • the area is sealed by at least one sealing strip, usually a plurality of sealing strips of the suction box from the inside against the roll shell, the sealing strip or the sealing strips each having / have a sealing surface which is pressed either in operation against the roll shell or with a predetermined gap distance , For example, from one to five millimeters, in particular three millimeters, is positioned relative to the inner surface of the roll shell.
  • a sealing strip usually a plurality of sealing strips of the suction box from the inside against the roll shell, the sealing strip or the sealing strips each having / have a sealing surface which is pressed either in operation against the roll shell or with a predetermined gap distance , For example, from one to five millimeters, in particular three millimeters, is positioned relative to the inner surface of the roll shell.
  • the inventive method is characterized in that either the sealing surface of the sealing strip and / or a bearing surface for the sealing strip on which the sealing strip during operation of the suction roll rests at least indirectly, with a convex or concave curvature along the longitudinal axis of the sealing strip and thus of the suction box and the suction roll is produced.
  • a convex curvature that is, a barrel-like curvature, is always provided when the sealing strip is intended and positioned so that it is pressed from bottom to top against the roll shell or is positioned at a predetermined distance from this.
  • a concave curvature is provided when the sealing strip is pressed from top to bottom against the roll shell or is positioned at a predetermined distance from this.
  • the sealing strip is positioned from bottom to top at or with a gap distance from the inner surface of the roll shell, so the convex curvature of the sealing surface of the sealing strips compensates for the deflection of the suction box over its axial length, so that in Operation, the sealing surface is flat or substantially flat.
  • the convex curvature can be done either by appropriate editing of the sealing surface of the sealing strip itself or by appropriate editing of the said bearing surface for the sealing strip, the sealing strip follows due to their elasticity of the convex bearing surface in shape, that is, the sealing strip bends along the convex bearing surface so she usually gets tired of this.
  • the concave curvature of the sealing surface compensates for the deflection of the suction box.
  • the sealing surface is again substantially or completely flat.
  • the suction box in particular has a sealing strip holder, in which the described bearing surface is designed for the sealing strip.
  • a sealing strip holder in which the described bearing surface is designed for the sealing strip.
  • a hose which can be filled with a pressure medium and which directly bears the sealing strip on itself is positioned on the support surface.
  • the tube follows the curvature in the support surface and gives this curvature, so to speak, to the sealing strip, which also follows the curvature and, even if it was previously listed with a right-angled, straight cross-section, bends accordingly, so that the sealing surface curves.
  • the support surface below the tube which can be filled with air, for example, can also be designed in stages, the tube compensates for the discontinuities of the stages and the sealing strip provides a steadily curved support surface available.
  • a plurality of correspondingly executed or overlying sealing strips may be provided, for example, individually or in groups targeted against the inner surface of the roll shell can be positioned or pressed to the desired concave or convex Surface of the sealing surface produce.
  • the concave or convex surface in this case has a surface course with discontinuities, whereas in the previously described embodiments, the course was continuous.
  • the suction roll according to the invention has a suction box with at least one sealing strip, which has a flat or substantially flat sealing surface during operation of the suction roll.
  • the sealing surface shows the curvature of the invention with a curvature in the region of its axial center to the outside, that is with a convex shape , or with a curvature in the region of its axial center inwards, that is, with a concave shape.
  • the expression of the curvature can be carried out according to the expected, that is the calculated or tentatively determined deflection of the suction box. If, for example, a deflection of a sealing strip holder in a suction box of 4.5 mm is expected, the sealing strip holder bearing surface, that is, the surface with which the sealing strip holder rests on the suction box, is cambered by this value (4.5 mm), so that gives a flat bearing surface during operation. Alternatively or additionally, as shown, directly the sealing surface of the sealing strip to be cambered.
  • FIG. 1 In the FIG. 1 can be seen a suction roll 1 with the rotatable, perforated roll shell 2.
  • the inner surface of the roll shell 2 is applied over a predetermined range by means of the suction box 3 with a negative pressure.
  • the suction roll 1 is wrapped, for example, by an air-permeable belt such as a sieve or a felt and a fibrous web to be drained thereon, wherein the negative pressure region formed by the stationary suction box 3 open towards the roll shell 2 adjoins the wrapping region in the interior of the roll.
  • the interior of the suction box 3 is connected to a vacuum source (not shown).
  • the suction box 3 adjoins the inside of the roll mantle 2 via a sealing strip 4 held by a sealing strip holder 8, that is, either the sealing strip 4 is pressed from the inside against the roll mantle 2 or held at a predetermined distance from this surface.
  • the roll shell 2 rotates over the fixed shaft 10 and is mounted for this purpose by means of the bearing 9 shown on the fixed shaft 10.
  • the suction box 3 has two sealing strip holder 8, each holding a sealing strip 4 in the radial direction of the roller 1 movable.
  • Each sealing strip holder 8 forms with the suction box 3, a support surface 5, on which a with a pressure medium, in particular compressed air, fillable hose 6 rests, which in turn each carries a sealing strip 4 directly.
  • the sealing strip 4 is moved in the direction of the inner surface of the roll shell 2, so that it rests with its sealing surface 7 inside the roll shell 2 or positioned at a predetermined distance from the inner surface of the roll shell 2. For example, a distance between one and five millimeters, in particular of three millimeters is set.
  • the bearing surface 5 has a convex surface, that is to say an outward curvature, over the longitudinal axis of the suction box 3, the highest point of the curvature being positioned centrally above the longitudinal axis of the suction box 3, and the lowest points of the bearing surface 5 respectively the two axial ends of the suction box 3 are positioned.
  • Both the hoses 6 and the sealing strips 4 adapt to this curvature of the bearing surface 5, so that the sealing surface 7 of each sealing strip has a correspondingly convex shape.
  • FIGS. 3 to 6 Possible embodiments of the suction box 3 or those areas with the support surface 5 and the sealing surface 7 are shown.
  • the bearing surface 5 convexly curved over the longitudinal axis, wherein at the same time to achieve a uniform distribution of stress, and the sealing surface 7 of the sealing strip 4 is convexly curved.
  • the sealing strip 4 without the hose 6 and the sealing strip holder 8 is again shown in FIG. 7 immediately after its production.
  • this sealing strip 4 has a concave base 11, with which it, in particular with the interposition of a tube 6, rests on the convex bearing surface 5.
  • the sealing surface 7 is convex over the longitudinal axis of the sealing strip 4.
  • the sealing strip 4 shown there although a convex sealing surface 7 has a flat base 11 immediately after its production.
  • This base 11 can be placed either on a flat shaped support surface 5 or a convex shaped support 5, in the latter case, the sealing strip 4 bends accordingly and increases the convexity of the sealing surface 7 relative to the state shown.
  • FIG. 6 an example of a stepped bearing surface 5 of a sealing strip holder 8 is shown.
  • a sealing strip 4 can be placed directly according to an embodiment.
  • This sealing strip 4, for example, in the FIG. 4 or in the FIG. 5 have shown shape, or even, for example, a rectangular cross-sectional shape. Due to the design results either by a bend of the sealing strip 4, the desired convex shaped sealing surface 7, or the sealing strip 4 additionally or alternatively, a convex shaped base 11 on.
  • a tube 6 is placed, which in turn carries a sealing strip 4.
  • the tube 6 causes the stepped support surface 5 is converted into a continuously curved direct support surface for the sealing strip 4 or "steamed".

Landscapes

  • Paper (AREA)
  • Making Paper Articles (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Unwinding Webs (AREA)
  • Replacement Of Web Rolls (AREA)

Claims (6)

  1. Procédé de fabrication d'une caisse de pression ou d'une caisse aspirante (3) pour un rouleau soufflant ou aspirant (1) d'une machine de fabrication et/ou d'amélioration d'une bande de papier, de carton, de papier-tissu ou d'une autre bande de matériau, le rouleau comprenant dans l'état monté une enveloppe de rouleau rotative perforée (2) et la caisse de pression ou aspirante (3), et la caisse de pression ou aspirante (3) étant connectée à une source de dépression ou de surpression de telle sorte qu'elle applique une dépression ou une surpression à la surface interne de l'enveloppe de rouleau (2), et
    la caisse de pression ou aspirante (3) comprenant au moins une nervure d'étanchéité (4) qui peut être pressée avec une surface d'étanchéité (7) depuis l'intérieur contre l'enveloppe de rouleau (2) ou qui peut être positionnée par rapport à celle-ci avec un espace de fente prédéfini ;
    caractérisé en ce que
    la surface d'étanchéité (7) de la nervure d'étanchéité (4) et/ou une surface d'appui (5) pour la nervure d'étanchéité (4), sur laquelle la nervure d'étanchéité (4) est montée au moins de manière indirecte pendant le fonctionnement du rouleau soufflant ou aspirant (1), est fabriquée avec une courbure convexe ou concave le long de l'axe longitudinal de la caisse de pression ou aspirante (3).
  2. Procédé selon la revendication 1, caractérisé en ce que la nervure d'étanchéité (4) est montée dans la région de l'extrémité supérieure dans la caisse de pression ou aspirante (3) de telle sorte que la nervure d'étanchéité (4) et sa surface d'étanchéité (7), dans l'état monté dans le rouleau soufflant ou aspirant (1), soient pressées depuis le bas vers le haut contre la surface interne de l'enveloppe de rouleau (2), ou soient positionnées contre celle-ci avec un espace de fente prédéfini, et la surface d'étanchéité (7) de la nervure d'étanchéité (4) et/ou la surface d'appui (5) pour la nervure d'étanchéité (4) sont fabriquées avec une courbure convexe le long de l'axe longitudinal de la caisse de pression ou aspirante (3).
  3. Procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la nervure d'étanchéité (4) est montée en interposant un tuyau (6) pouvant être rempli d'un fluide sous pression, notamment de l'air sous pression, sur la surface d'appui (5).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une pluralité de segments de nervure d'étanchéité individuels ou en groupe, pouvant être positionnés ou pressés par rapport à la surface interne de l'enveloppe de rouleau (2) est montée dans la direction axiale de la caisse de pression ou aspirante (3).
  5. Procédé selon la revendication 3, et notamment selon la revendication 4, caractérisé en ce que la surface d'appui (5) est réalisée sous forme étagée, et le tuyau (6) est monté sur celle-ci de telle sorte qu'il fournisse après son soufflage une surface de palier concave ou convexe pour la nervure d'étanchéité (4).
  6. Rouleau soufflant ou aspirant (1) d'une machine de fabrication et/ou d'amélioration d'une bande de papier, carton, papier-tissu ou d'une autre bande de matériau, comprenant une enveloppe de rouleau rotative perforée (2) et une caisse de pression ou aspirante (3), la caisse de pression ou aspirante (3) étant connectée à une source de dépression ou de surpression de telle sorte qu'elle applique sur la surface interne de l'enveloppe de rouleau (2) une dépression ou une surpression,
    la caisse de pression ou aspirante (3) comprenant au moins une nervure d'étanchéité (4), qui est pressée avec une surface d'étanchéité (7) depuis l'intérieur contre l'enveloppe de rouleau (2), ou qui est positionnée par rapport à celle-ci avec un espace de fente prédéfini ;
    caractérisé en ce que
    la surface d'étanchéité (7) de la nervure d'étanchéité (4) et/ou une surface d'appui (5) pour la nervure d'étanchéité (4) sont réalisées dans le cas d'un appui plan, essentiellement sur toute la surface, de la caisse de pression ou aspirante (3) sur un support plan, de manière convexe ou concave dans la direction de l'axe longitudinal de la caisse de pression ou aspirante (3).
EP06122408A 2005-12-10 2006-10-17 Rouleau pour machine à papier Active EP1795649B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005059040A DE102005059040A1 (de) 2005-12-10 2005-12-10 Papiermaschinenwalze

Publications (2)

Publication Number Publication Date
EP1795649A1 EP1795649A1 (fr) 2007-06-13
EP1795649B1 true EP1795649B1 (fr) 2010-01-13

Family

ID=37696462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122408A Active EP1795649B1 (fr) 2005-12-10 2006-10-17 Rouleau pour machine à papier

Country Status (4)

Country Link
EP (1) EP1795649B1 (fr)
AT (1) ATE455206T1 (fr)
DE (2) DE102005059040A1 (fr)
ES (1) ES2337715T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002035A1 (de) 2008-05-28 2009-12-03 Voith Patent Gmbh Saugeinrichtung für eine eine Faserstoffbahn herstellende Maschine
DE102008041127A1 (de) 2008-08-08 2010-02-11 Voith Patent Gmbh Dichtsystem für eine Saugwalze
DE102012208811B3 (de) * 2012-05-25 2013-07-11 Voith Patent Gmbh Dichtleistensystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE961778C (de) 1954-02-22 1957-04-11 Millspaugh Ltd Saugkasten fuer den Saugzylinder einer Papiermaschine
US2969837A (en) * 1958-06-10 1961-01-31 Layton Greenfield Inc Suction roll construction
US3273492A (en) * 1963-10-16 1966-09-20 Beloit Corp Suction roll counter-deflector
FI103593B (fi) 1998-04-02 1999-07-30 Valmet Corp Imutelan imulaatikon tiivistysrakenne

Also Published As

Publication number Publication date
ATE455206T1 (de) 2010-01-15
DE102005059040A1 (de) 2007-06-14
DE502006005904D1 (de) 2010-03-04
ES2337715T3 (es) 2010-04-28
EP1795649A1 (fr) 2007-06-13

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