EP1496152A1 - Rouleau de presse ou une enveloppe cylindrique - Google Patents

Rouleau de presse ou une enveloppe cylindrique Download PDF

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Publication number
EP1496152A1
EP1496152A1 EP04102634A EP04102634A EP1496152A1 EP 1496152 A1 EP1496152 A1 EP 1496152A1 EP 04102634 A EP04102634 A EP 04102634A EP 04102634 A EP04102634 A EP 04102634A EP 1496152 A1 EP1496152 A1 EP 1496152A1
Authority
EP
European Patent Office
Prior art keywords
roll
press
shell
press roll
mantle
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Withdrawn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
EP04102634A
Other languages
German (de)
English (en)
Inventor
Rudolf Beisswanger
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
Publication of EP1496152A1 publication Critical patent/EP1496152A1/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Withdrawn legal-status Critical Current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
    • 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
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/08—Pressure rolls
    • D21F3/086—Pressure rolls having a grooved surface

Definitions

  • the invention relates to a press roll or a roll shell of a Shoe press roll and a pressing device in a press section of a machine for producing a paper, board, tissue or another fibrous web a pulp suspension with grooved depressions on its mantle surface for storing press water.
  • a press section for a paper machine has two pressing points, each of one with a Shoe press roller co-acting press roller can be formed.
  • the press section has two pressing points, each of one with a Shoe press roller co-acting press roller can be formed.
  • the press section has two pressing points, each of one with a Shoe press roller co-acting press roller can be formed.
  • the first Pressstelle run a first upper felt, coming from a Formersiebende Paper web, an underfelt and a press cover of a first shoe press roll therethrough.
  • the underfelt continues with the paper web to the second press site. Together with a second top felt and a press cover of a second Pressing point, the paper web then passes through the second pressing site.
  • the paper web follows the lower felt further to a take-off roll, through which they is transferred to a first dryer fabric, the paper web in the dryer section transferred.
  • For deflecting the upper felt and the lower felt are guide rollers and Suction rolls available.
  • the mantle surface of the press rolls and the press jackets of the shoe press rolls are each equipped with blind holes to drain the out of the Paper web to squeeze out extruded water.
  • press rolls with grooves or both grooves and To provide blind holes to allow the outflow of press water.
  • DE 100 55 708 A1 discloses a method and a device for Drainage on its outer surface with depressions, in particular grooves, described described circumferential pressing surface, by the mantle of a rotating press roll or a revolving press belt of a paper machine is formed.
  • an air flow is generated, by remaining in the wells, not by centrifuging away Water is carried out of the wells out to the outside. Subsequently the surface water is stripped off the pressing surface.
  • the grooves have a width of about 0.5 mm and a depth of 5 mm; the grooves are so narrow in relation to their depth.
  • the storage volume of the known press rollers for receiving the Press water not optimally designed. It turns out that in the operation of the Available storage volume can not be fully utilized. To the one, the water when filling the grooves, d. H. during the short-term Pressing process in the press nip, do not fill the grooves to the bottom of the groove.
  • a press roll a roll shell a Shoe press roll and a pressing device to provide, which is a ensure improved drainage in the press nip.
  • this object is achieved with a press roll or a Roll shell of the type mentioned solved in that the press roll or the roll shell in the web running direction has a groove or grooves, the one Ratio of their depth to their width of at most 8 has or have.
  • the selected according to the invention ratio between width and depth of the grooves allows a complete or almost complete filling with press water and thus allows an optimal utilization of the volume of the grooves Available storage volume.
  • the grooves extend substantially transverse to the longitudinal axis of the press roll in the running direction of the fibrous web, in the direction the longitudinal axis or obliquely to the longitudinal axis. If only a single groove exists is, this spiral or helical runs on the lateral surface with a free selectable angle with respect to the longitudinal axis of the roller.
  • the ratio of the depth to Width is at most 5.
  • the depth is 4 mm or less and the width is 0.6 mm or more.
  • a press roll or a roll shell in or at the the grooves have a depth of 0.8 mm and a width of 2.2 mm.
  • a storage volume on the mantle surface of the press roll or shoe press roll of 1100 cm 3 or more is achieved, based on 1 m 2 of the mantle surface of the press roll or of the roll mantle.
  • a storage volume on the mantle surface of the press roll of 1300 cm 3 or more is achieved, based on 1 m 2 of the mantle surface.
  • the grooves cover at least 25% of the mantle surface of the press roll.
  • press roll cover the grooves at least 33% of the mantle surface.
  • the grooves take 39% or more of the mantle surface of the press roll or Roll mantle.
  • the storage volume is increased by blind holes, which on the Cloak surface are evenly distributed between the grooves.
  • the grooves are included in the area where the blind holes are located.
  • these are on the mantle surface also within the grooves or with a Intersection of the grooves evenly distributed.
  • At least one scraper on the press roll or the outer surface of the shell Roll mantle arranged.
  • the geometry of the grooves is already designed so that due to the Centrifugal force self-emptying of the grooves is possible.
  • the invention is particularly advantageous at high speeds, such as at speeds of 1400 m / min and more, at speeds of more than 1700 m / min and above all at speeds of more than 1800 m / min.
  • high speeds such as at speeds of 1400 m / min and more, at speeds of more than 1700 m / min and above all at speeds of more than 1800 m / min.
  • the grooves can be this even at higher speeds with water fill.
  • the centrifugal force is affected at higher speeds stronger, which promotes the emptying of the grooves.
  • the invention also relates to a pressing surface for use in a Pressing device, on a pressing device with two press rollers, wherein one of the both rollers may be a shoe roll or both rollers shoe rolls and on the press section equipped with such press rolls is.
  • the invention relates to the use of a press roll in the inventive design in a press section, in particular with a Tandem arrangement, each with a press roll in conjunction with a Shoe press roll.
  • a fibrous web 1 (Fig. 1a) to a pressing or a press nip guided in a press section, which has a press roll 2. These interacts with a shoe roll 3.
  • Two felts 4 and 5 go through together with the fibrous web 1 the press nip.
  • DE 100 22 087 A1 is represented by a forming wire of FIG Coming Siebpartie be sucked by a suction roller to the upper felt and be transported over this to the press nip.
  • the press nip becomes the Fibrous web 1, for example, as shown in Fig. 1a, in conjunction with led out the lower felt 4.
  • the shoe roll 3 comprises a down against the press roller 2 pressed Press shoe 6, which is convexly formed opposite to the press roller 2.
  • On the Press shoe 6 runs off a roll shell 7.
  • these are for the better Water discharge over the entire lateral surface of the roll shell 7 distributed, at least, as far as this interacts with the felt 5, blind bores 8 introduced, which are only partially reproduced here.
  • blind bores 8 introduced, which are only partially reproduced here.
  • the Roll shell 7 grooves or both grooves and the blind holes 8 available.
  • the grooves are preferably in the circumferential direction of the roll shell 7; alternative they run transversely to the circumferential direction of the roll shell 7 and thus transversely to the Conveying direction of the fibrous web 1.
  • the grooves obliquely over the circumference of the Roll mantle 7, in particular helical, run.
  • blind holes 8 may be present.
  • the grooves 10 have a width B and a Depth T in the shell of the roll 2 or in the roll shell 7.
  • the grooves 10 have preferably in each case the same distances to each other; but you can too different distances depending on the expected water attack during the pressing process.
  • At least one scraper or water scraper is employed on the press roll 2, the free water from the lateral surface of the press roll 2 abstreift.
  • the scraper can be arranged at a small distance to the lateral surface, so that he with this does not come into contact.
  • a blow doctor provided, through which air is blown on the lateral surface, which turns out the water the grooves 10 and the holes 11 in the roll shell of the press roll. 2 pushes. (For the sake of simplicity, the blind holes in Fig. 2 are only partially shown.)
  • the grooves 10 are depending on the embodiment of different densities on the lateral surface the press roller 2 applied, wherein depth and width of the grooves 10 is a ratio of at most 8: 1, preferably 5: 1, to each other. Also number and Diameter of the blind holes 11 may vary.
  • the blind holes 11 are between the grooves 10 in the lateral surface of the Press roll 2 introduced to assist the drainage.
  • the Blind holes 11 may also be the lateral boundaries of the grooves 10 be exceeded or arranged on the bottom of the grooves 10.
  • Fig. 3 areas are shown in which according to the invention, the Move dimensions of the grooves 10.
  • the depth T of the grooves 10 in Millimeters plotted on the x-axis and the width B also in millimeters the y-axis.
  • the ratio of the width B and the depth is defined by an area 20 between a straight line 21 through the zero point and the y-axis wi eder founded.
  • the areas 20, 22, 24 are delimited by a straight line 26, which is the maximum Depth of 4 mm and parallel to the y-axis.
  • the fibrous web 1 (FIG. 4) is first pulled together with the upper felt 5 in the press nip and is sandwiched, d. h., Adjacent to both the lower and the upper felt 4, 5, from the Pressnip led out. Only after leaving the area of the press roll 2 and the Shoe press roll 3, the fibrous web 1 by a suction roll 12 together with the lower felt 4 at an acute angle to the horizontal direction deflected down, while the upper felt 5 horizontally to a guide roller thirteenth is continued.
  • scraper 14 and a on the Surface of the press roller 2 acting scraper 15 arranged on the one hand the Remove water from the grooves 10 and the blind holes 11 and on the other hand to remove dirt from the surface of the press roll 2. It can several scraper blade 14 and scraper 15 on the press roller 2 in different Arrangements be made.
  • the blow doctor 14 (FIG. 5) is fastened to a holder 16, which under one acute angle to the lateral surface 16 of the press roller 2 is inclined.
  • the scraper 14 preferably extends over the entire, covered by the paper web 1 Width of the press roll 2; or alternatively, it is a plurality of blowing blades 14 arranged next to each other.
  • the blow doctor 14 comprises a supply pipe 18 for Supply of compressed air from individual openings 18a in the jacket wall of the Supply pipe 18 emerges and from a narrow gap 19 in the immediate Close to the outer surface of the press roller 2 is pressed out on this.
  • a suction scraper may be present, the by means of vacuum sucks impurities and water. In this case, that will Vacuum provided via the supply pipe 18.
  • the press roll 2 has, for example, a surface with grooves 10, as shown in FIG. 6 are shown. These are in an outer, applied to a roll tube 30 Layer 31 arranged, for example, milled.
  • the outer layer 31 is made for example, steel, especially stainless steel, or bronze.
  • the roller tube 30 is made of steel or cast iron.
  • the outer layer 31 consists of a Plastic, for example polyurethane. This particular has a hardness of about 4 P & J (hardness unit after Pusey and Jones).
  • the grooves 10 are directly in the Roller tube 30 introduced, made of steel, in particular stainless steel, gray cast iron or Bronze exists.
  • both in this and in the 6 embodiment described between the grooves 10th or this ananned also blind holes are present.
  • a so-called profile spiral 32 is shown, which consists of a plastic or a metal and helically on a roller tube 33 of a roller 34 is wound so that the coming into contact with one of the felts 4, 5 Area of the press roll 2 completely occupied by a helically extending groove 10 is.
  • the profile spiral 32 producing band has a substantially L-shaped Cross section, so that by juxtaposing the turns of the Profile spiral 32 a continuous groove 10 having a substantially rectangular Cross-section arises.
  • the groove 10 may, for example, by cutting off arise.
  • a particular advantage of such a reference is also that under Line pressure extended the press zone with the jacket 7 of the shoe press roll 3. at sufficient flexibility of the plastic used can also be the coat 7 out of the plastic. When looking through the use of a flexible material the line pressure increases, the drainage is increased, and at the same time the felts 4, 5 are spared.
  • FIG. 9a to 9d A plurality of possibilities for the design of the cross section of helically extending groove 10 or parallel or at least in substantially parallel grooves 10 is shown in Figs. 9a to 9d.
  • both the upper edges 35 of the Grooved 10 and the bottom edges 36 rounded.
  • the variant of FIG. 9b has rectangular grooves 10, while the grooves 10 in Fig. 9c a have trapezoidal cross-section.
  • the grooves 10 in Fig. 9d also have one trapezoidal cross-section with rounded upper edges 35.
  • the invention can be in a press section of a machine for producing a Fiber web in pressing arrangements 40, 41 (FIG. 10), consisting of a Press roll and a shoe press roll, both for the press roll and for the Insert roll jacket of shoe press roll. Likewise, she agrees Use double shoe presses.
  • a paper web 43 which from an upper felt 44 is guided, together with a lower felt 45 in the pressing assembly 40th introduced.
  • the paper web 43 is then in a sandwich together with the lower felt 45 and the upper felt 44 to a suction roll 46 from the Press nip brought out.
  • a further suction roller 47 it is then sucked on an upper felt 48 again.
  • the paper web 43 is again conveyed in a sandwich up to a suction roll 50, from it is transported together with the upper felt 48 in a drying section 51, while the lower felt 49 is deflected down again.
  • the invention is an effective even at high production speeds Water absorption in the shell of a press roll or a shoe press roll allows, as by a sufficient width of the groove or grooves and / or the Blind holes the water penetrates into this quickly enough and through the Pressing pressure in the area of the press shoe and the adhesion to the bottom of the press shoe Depressions penetrates.
  • the drainage is just at high Speeds supported by the centrifugal force.
  • the invention thus relates to those with grooves and / or blind holes equipped jacket of both a shoe press roll and a press roll and on a press arrangement as well as on a press section in which such Press arrangements and such press rolls and shoe press rolls used come.
  • the press rolls are for example profile rolls, d. H. by bending controlled Rolls, so called Nipco-P-rolls, or Nipcoflex-rolls, like them already known from DE 100 55 708 A1.
  • a press section can be the press arrangements also use in a tandem arrangement, in which at the first press point the shoe press roll above and the press roller arranged below are at the second press site, the press roll above and the Shoe press roller are mounted below, or vice versa.

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  • Paper (AREA)
EP04102634A 2003-07-08 2004-06-09 Rouleau de presse ou une enveloppe cylindrique Withdrawn EP1496152A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10330966 2003-07-08
DE2003130966 DE10330966A1 (de) 2003-07-08 2003-07-08 Pressvorrichtung in einer Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
EP1496152A1 true EP1496152A1 (fr) 2005-01-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04102634A Withdrawn EP1496152A1 (fr) 2003-07-08 2004-06-09 Rouleau de presse ou une enveloppe cylindrique

Country Status (2)

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EP (1) EP1496152A1 (fr)
DE (1) DE10330966A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754823A3 (fr) * 2005-08-19 2008-08-27 Voith Patent GmbH Bande de transfert
EP1754822A3 (fr) * 2005-08-19 2011-11-30 Voith Patent GmbH Procédé d'opération d'un dispositif de pressage
US8496785B2 (en) 2009-08-04 2013-07-30 Voith Patent Gmbh Combination of a press felt with a pressure roll covering and/or suction roll covering for a paper machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10350767A1 (de) * 2003-10-30 2005-07-07 Voith Paper Patent Gmbh Leiteinrichtung für eine Maschine zur Herstellung einer Faserstoffbahn und Verfahren zur Führung einer herzustellenden Faserstoffbahn

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599306A (en) * 1969-06-13 1971-08-17 Beloit Corp Roll composition
US3600779A (en) * 1969-12-12 1971-08-24 Allis Chalmers Mfg Co Press roll with tapered grooves
DE3727563C1 (de) * 1987-08-19 1989-02-09 Voith Gmbh J M Pressmantel einer Entwaesserungspresse fuer Papierherstellungsmaschinen od.dgl.
US4908103A (en) * 1985-10-03 1990-03-13 Beloit Corporation Bearing blanket for an extended nip press having laminates of different hardnesses
EP0541498A1 (fr) * 1991-11-08 1993-05-12 Albany International Corp. Construction en hélice de bandes rainurées pour presse à rinçage prolongé
EP0886004A1 (fr) * 1997-06-21 1998-12-23 Ichikawa Co.,Ltd. Bande pour une presse à patin
US6004429A (en) * 1996-12-23 1999-12-21 Voith Sulzer Papiermaschinen Gmbh Machine and method for producing a fibrous creped web
DE10055708A1 (de) * 2000-11-10 2002-05-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO129688C (fr) * 1963-02-14 1976-12-14 Beloit Corp
US3588978A (en) * 1968-12-18 1971-06-29 Beloit Corp Grooved roll for paper-making
GB1281931A (en) * 1968-12-18 1972-07-19 Beloit Corp Doctor blade roll assembly
DE2704158C2 (de) * 1977-02-02 1986-02-20 Küsters, Eduard, 4150 Krefeld Preßwalze
DE4443598C2 (de) * 1994-12-07 2000-05-25 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung eines Preßmantels
DE10022087A1 (de) * 2000-05-08 2001-11-22 Voith Paper Patent Gmbh Pressenpartie für eine Papiermaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599306A (en) * 1969-06-13 1971-08-17 Beloit Corp Roll composition
US3600779A (en) * 1969-12-12 1971-08-24 Allis Chalmers Mfg Co Press roll with tapered grooves
US4908103A (en) * 1985-10-03 1990-03-13 Beloit Corporation Bearing blanket for an extended nip press having laminates of different hardnesses
DE3727563C1 (de) * 1987-08-19 1989-02-09 Voith Gmbh J M Pressmantel einer Entwaesserungspresse fuer Papierherstellungsmaschinen od.dgl.
EP0541498A1 (fr) * 1991-11-08 1993-05-12 Albany International Corp. Construction en hélice de bandes rainurées pour presse à rinçage prolongé
US6004429A (en) * 1996-12-23 1999-12-21 Voith Sulzer Papiermaschinen Gmbh Machine and method for producing a fibrous creped web
EP0886004A1 (fr) * 1997-06-21 1998-12-23 Ichikawa Co.,Ltd. Bande pour une presse à patin
DE10055708A1 (de) * 2000-11-10 2002-05-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754823A3 (fr) * 2005-08-19 2008-08-27 Voith Patent GmbH Bande de transfert
US7722741B2 (en) 2005-08-19 2010-05-25 Voith Patent Gmbh Transfer belt
EP1754822A3 (fr) * 2005-08-19 2011-11-30 Voith Patent GmbH Procédé d'opération d'un dispositif de pressage
EP2360314A3 (fr) * 2005-08-19 2012-04-18 Voith Patent GmbH Bande de transfert
US8496785B2 (en) 2009-08-04 2013-07-30 Voith Patent Gmbh Combination of a press felt with a pressure roll covering and/or suction roll covering for a paper machine

Also Published As

Publication number Publication date
DE10330966A1 (de) 2005-01-27

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