EP2085513B1 - Unité de pression - Google Patents

Unité de pression Download PDF

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Publication number
EP2085513B1
EP2085513B1 EP08168942A EP08168942A EP2085513B1 EP 2085513 B1 EP2085513 B1 EP 2085513B1 EP 08168942 A EP08168942 A EP 08168942A EP 08168942 A EP08168942 A EP 08168942A EP 2085513 B1 EP2085513 B1 EP 2085513B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressing unit
unit according
pressing
shoe
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
EP08168942A
Other languages
German (de)
English (en)
Other versions
EP2085513A1 (fr
Inventor
Christian Müller
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
Priority to PL08168942T priority Critical patent/PL2085513T3/pl
Publication of EP2085513A1 publication Critical patent/EP2085513A1/fr
Application granted granted Critical
Publication of EP2085513B1 publication Critical patent/EP2085513B1/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
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to a pressing unit for a press roll, which has an axially extending contact shoe, which is mounted on a support, wherein the contact shoe against the carrier in a pressing direction linearly displaceable and between the contact shoe and the carrier at least one active pressure unit is arranged.
  • Such an Anpress unit is off WO-A-2005/042834 known.
  • the invention also relates to a press roll with a Anpressmaschine invention and their use.
  • the pressure shoe extends generally over the entire press nip between the press roll and a counter roll. Temperature differences, the internal pressure of the rolls, an uneven stiffness of the counter roll and the weight-related sag of the rolls lead to an uneven line cross-section in the press nip.
  • the object of the invention is therefore to improve the producible with such Anpressech pressure profile with the least possible effort.
  • the transmission elements give the contact shoe in the circumferential direction the required stable support, while they hardly affect the adaptability of the contact shoe to a counter surface in the axial direction.
  • the transmission elements should be dimensionally stable, in particular in the pressing direction and preferably made of steel, aluminum or a plastic.
  • the transmission elements are mounted at least slightly displaceable in the axial direction.
  • the transmission elements have a low mutual play.
  • the pressure shoe should be relatively flexible.
  • the pressure shoe in the pressing direction has an average thickness between 5 and 30, preferably between 15 and 20 mm and consists of aluminum or an aluminum alloy.
  • the press shoe In order to be able to reopen a press nip quickly and easily, the press shoe should be coupled to the carrier via a return element, which can easily be achieved with spring elements in a known manner.
  • At least one flexible, preferably axially over the entire contact pressure shoe extending balance plate is present between the transmission elements and the printing unit.
  • the pressure unit should be formed by a plurality of axially juxtaposed and preferably separately controllable pressure elements.
  • the number of axially juxtaposed transmission elements is greater than the number of axially juxtaposed pressure elements.
  • the printing unit of several, in the circumferential direction of the press roll arranged side by side and preferably separately controllable pressure elements is formed.
  • the printing unit is formed by only one printing element.
  • the pressure elements have hitherto been formed in each case by a piston-cylinder arrangement which can be acted upon by a pressure fluid.
  • the pressure elements are each formed by a flexible pressure body, which has at least one cavity, which for generating the pressing force via an increase in volume of the pressure hull with a pressurized fluid can be acted upon.
  • the press shoe should have a concave pressing surface in the circumferential direction of the press roll and the press roll should have a rotatable and preferably flexible roll mantle.
  • Prolonged press gaps are also associated with a longer residence time of the material web in the press nip, which may be advantageous in particular in the case of smoothing or dewatering the same.
  • the pressing unit presses the roll shell to form a press nip in the direction of a counter roll.
  • the press roll according to the invention is used in a machine for producing and / or finishing a paper, board, tissue or another fibrous web.
  • FIG. 1 shows a schematic partial cross section through a press arrangement for dewatering a fibrous web 10, in particular a tissue web.
  • the press nip is formed by a press roll in the form of a shoe press roll and a cylindrical counter roll 3.
  • the fibrous web 10 runs here by way of example with a lower, water-absorbing press felt 14. After the press nip, the fibrous web 10 adheres to the smooth lateral surface of the counter roll 3 and can be removed therefrom with a creping doctor.
  • the press roll is formed by a flexible roll shell 2, which is pressed by a Anpress unit with a pressure shoe 1 in the pressing direction 9 to the counter roll 3.
  • the pressure shoe 1 has a concave pressing surface 12.
  • the pressing unit is mounted on an axially extending through the rotatable roll shell 2, stationary support 7.
  • the contact pressure of the contact shoe 1 takes place here via two juxtaposed in the circumferential direction of the press roll and with respect to the contact pressure separately controllable pressure elements 5.6.
  • These pressure elements 5,6 are each formed here by a flexible pressure body in the form of an axially extending pressure hose.
  • each pressure hose is connected to a source of pressurized fluid, so that it can be acted upon by a volume increase of the pressure hose with a pressure fluid, in particular pressure oil to generate the pressing force.
  • the pressure element may have foldable, rigid walls instead of the elastic walls to allow a change in volume, for example.
  • the pressure shoe 1 is made flexible, made of aluminum and has a thickness in the pressing direction 9 between 15 and 20 mm. This flexibility allows a comprehensive adaptation to the contour of the counter roll. 3
  • a relatively easily deformable creping cylinder is usually used as counter-roller 3. Due to the deformation of the creping cylinder, the press nip does not remain straight, especially in the edge area, so that undesired line force deviations can occur here.
  • the flexurally soft pressure shoe 1 allows an optimal adaptation to the shape of the counter roller 3 via the contact pressure with the two flexible pressure elements 5, 6.
  • a row of axially adjacent transmission elements 4 is located between the pressure elements 5, 6 and the pressure shoe 1.
  • These transmission elements 4 are stiff compared to the pressure shoe and made of plastic or metal.
  • the pressure profile in the circumferential direction, in particular in the transition region between the two pressure elements 5,6 is made uniform.
  • the transmission elements 4 are slightly displaceable in the axial direction in a guide. A clearance of about 0.2 mm between the transmission elements 4 allows the independent movement of the transmission elements 4 in the pressing direction.
  • the pressure shoe 1 is connected via a return element 8 in the form of a known return spring to the carrier 7.
  • a compensating plate 11 which extends over the entire pressure shoe 1.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Finger-Pressure Massage (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (18)

  1. Unité de pressage pour un cylindre de pressage, qui présente un sabot de pressage (1) s'étendant axialement, qui est monté sur un support (7), le sabot de pressage (1) pouvant être déplacé linéairement par rapport au support (7) dans une direction de pressage (9) et au moins une unité de pression active étant disposée entre le sabot de pressage (1) et le support (7), caractérisée en ce qu'entre l'unité de pression et le sabot de pressage (1) sont prévus plusieurs éléments de transfert (4) disposés axialement le long du cylindre de pressage les uns à côté des autres, qui sont montés de manière déplaçable au moins légèrement dans la direction axiale.
  2. Unité de pressage selon la revendication 1, caractérisée en ce que les éléments de transfert (4) ont une stabilité de forme notamment dans la direction de pressage (9), et se composent de préférence d'acier, d'aluminium ou d'un plastique.
  3. Unité de pressage selon l'une quelconque des revendications par conséquent, caractérisée en ce que le sabot de pressage (1) est relativement souple en flexion.
  4. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le sabot de pressage (1) présente, dans la direction de pressage (9) une épaisseur moyenne comprise entre 5 et 30, de préférence entre 15 et 20 mm.
  5. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le sabot de pressage (1) se compose d'aluminium ou d'un alliage d'aluminium.
  6. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le sabot de pressage (1) est accouplé au support (7) par le biais d'un élément de rappel (8).
  7. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une plaque de compensation (11) souple en flexion, s'étendant de préférence axialement sur tout le sabot de pressage (1), est prévue entre les éléments de transfert (4) et l'unité de pression.
  8. Unité de pressage selon la revendication 7, caractérisée en ce que la plaque de compensation (11) s'étend dans la direction périphérique du cylindre de pressage sur l'ensemble du sabot de pressage (1).
  9. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de pression est formée par plusieurs éléments de pression (5, 6) disposés axialement les uns à côté des autres et commandables de préférence séparément.
  10. Unité de pressage selon la revendication 9, caractérisée en ce que le nombre des éléments de transfert (4) disposés axialement les uns à côté des autres est supérieur au nombre des éléments de pression (5, 6) disposés axialement les uns à côté des autres.
  11. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de pression est formée par plusieurs éléments de pression (5, 6) disposés les uns à côté des autres dans la direction périphérique du cylindre de pressage et de préférence commandables séparément.
  12. Unité de pressage selon l'une quelconque des revendications 1 à 8, caractérisée en ce que l'unité de pression n'est formée que par un seul élément de pression (5, 6).
  13. Unité de pressage selon l'une quelconque des revendications 9 à 12, caractérisée en ce que les éléments de pression (5, 6) sont formés à chaque fois par un agencement cylindre-piston pouvant être sollicité par un fluide sous pression.
  14. Unité de pressage selon l'une quelconque des revendications 9 à 12, caractérisée en ce que les éléments de pression (5, 6) sont formés à chaque fois par un corps de pression flexible, qui présente au moins une cavité (13), qui peut être sollicitée avec un fluide sous pression pour produire la force de pression par le biais d'une augmentation de volume du corps de pression.
  15. Unité de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le sabot de pressage (1) possède, vu dans la direction périphérique du cylindre de pressage, une surface de pressage concave (12).
  16. Cylindre de pressage comprenant une unité de pressage selon l'une quelconque des revendications 1 à 15, caractérisé en ce que
    le cylindre de pressage possède une enveloppe de cylindre (2) rotative et de préférence flexible.
  17. Cylindre de pressage selon la revendication 16, comprenant une unité de pressage selon l'une quelconque des revendications 1 à 15, caractérisé en ce que
    l'unité de pressage presse l'enveloppe de cylindre (2) dans la direction d'un cylindre conjugué (3) pour former une fente de pressage.
  18. Utilisation du cylindre de pressage selon la revendication 16 ou 17 dans une machine de fabrication et/ou d'amélioration d'une bande de papier, carton, papier-tissu, ou d'une autre bande fibreuse (10).
EP08168942A 2008-01-31 2008-11-12 Unité de pression Active EP2085513B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08168942T PL2085513T3 (pl) 2008-01-31 2008-11-12 Jednostka dociskowa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008000199A DE102008000199A1 (de) 2008-01-31 2008-01-31 Anpresseinheit

Publications (2)

Publication Number Publication Date
EP2085513A1 EP2085513A1 (fr) 2009-08-05
EP2085513B1 true EP2085513B1 (fr) 2011-09-28

Family

ID=40577968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08168942A Active EP2085513B1 (fr) 2008-01-31 2008-11-12 Unité de pression

Country Status (4)

Country Link
EP (1) EP2085513B1 (fr)
AT (1) ATE526450T1 (fr)
DE (1) DE102008000199A1 (fr)
PL (1) PL2085513T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602387A1 (fr) 2011-12-07 2013-06-12 Metso Paper Sweden AB Machine fabrication de papier, rouleau pinceur élargie et procédé pour la production de papier de soie
US9181655B2 (en) 2012-04-19 2015-11-10 Valmet Ab Extended nip roll, an extended nip press making use of the extended nip roll, a papermaking machine and a method of operating an extended nip press
US9702084B2 (en) 2014-01-20 2017-07-11 Valmet S.P.A. Process and a machine for making a tissue paper web
US10808359B2 (en) 2016-12-19 2020-10-20 Valmet Aktiebolag Method for making tissue paper
US11220785B2 (en) 2018-10-12 2022-01-11 Valmet Aktiebolag Tissue paper making machine and a method of operating a tissue paper making machine
WO2022084403A1 (fr) 2020-10-21 2022-04-28 Valmet Aktiebolag Cylindre de séchage yankee et machine de fabrication de papiers minces

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042087A1 (de) * 2008-09-15 2010-03-18 Voith Patent Gmbh Anpresseinheit für eine Papier-, Karton- oder Tissuemaschine
US8673118B2 (en) 2011-02-18 2014-03-18 Valmet Aktiebolag Press device with an extended nip, a paper making machine and a method of operating a press device
SE536202C2 (sv) 2011-07-12 2013-06-25 Metso Paper Sweden Ab Förfarande och maskin för tillverkning av en strukturerad fiberbana av papper
DE102014208159A1 (de) 2014-04-30 2015-11-05 Voith Patent Gmbh Anpresseinheit
CN108166303A (zh) * 2017-12-22 2018-06-15 江苏华东造纸机械有限公司 靴式压榨加载装置
SE542841C2 (en) 2018-04-19 2020-07-14 Valmet Oy Method and a machine for producing a tissue web

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6045658A (en) * 1998-06-03 2000-04-04 Beloit Technologies, Inc. Extended nip press apparatus
FI114031B (fi) * 2003-03-04 2004-07-30 Metso Paper Inc Menetelmä paperirainan puristamiseksi ja paperirainan puristuslaite
DE10351294A1 (de) 2003-10-31 2005-06-02 Voith Paper Patent Gmbh Anpresseinrichtung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602387A1 (fr) 2011-12-07 2013-06-12 Metso Paper Sweden AB Machine fabrication de papier, rouleau pinceur élargie et procédé pour la production de papier de soie
US8911594B2 (en) 2011-12-07 2014-12-16 Valmet Ab Paper making machine, an extended nip roll and a method of producing tissue paper
US9057157B2 (en) 2011-12-07 2015-06-16 Valmet Ab Paper making machine, an extended nip roll and a method of producing tissue paper
US9410287B2 (en) 2011-12-07 2016-08-09 Valmet Aktiebolag Paper making machine, an extended nip roll and a method of producing tissue paper
US9181655B2 (en) 2012-04-19 2015-11-10 Valmet Ab Extended nip roll, an extended nip press making use of the extended nip roll, a papermaking machine and a method of operating an extended nip press
US9702084B2 (en) 2014-01-20 2017-07-11 Valmet S.P.A. Process and a machine for making a tissue paper web
US10808359B2 (en) 2016-12-19 2020-10-20 Valmet Aktiebolag Method for making tissue paper
US11220785B2 (en) 2018-10-12 2022-01-11 Valmet Aktiebolag Tissue paper making machine and a method of operating a tissue paper making machine
WO2022084403A1 (fr) 2020-10-21 2022-04-28 Valmet Aktiebolag Cylindre de séchage yankee et machine de fabrication de papiers minces

Also Published As

Publication number Publication date
EP2085513A1 (fr) 2009-08-05
PL2085513T3 (pl) 2012-02-29
DE102008000199A1 (de) 2009-08-06
ATE526450T1 (de) 2011-10-15

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