EP2808442A1 - Dispositif de formation d'une zone de pincement allongée - Google Patents

Dispositif de formation d'une zone de pincement allongée Download PDF

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Publication number
EP2808442A1
EP2808442A1 EP20130002777 EP13002777A EP2808442A1 EP 2808442 A1 EP2808442 A1 EP 2808442A1 EP 20130002777 EP20130002777 EP 20130002777 EP 13002777 A EP13002777 A EP 13002777A EP 2808442 A1 EP2808442 A1 EP 2808442A1
Authority
EP
European Patent Office
Prior art keywords
pressure pad
shoe
chamber
roll
groove
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.)
Granted
Application number
EP20130002777
Other languages
German (de)
English (en)
Other versions
EP2808442B1 (fr
Inventor
Robert Meitner
David Lange
Andreas Anzel
Wilhelm Mausser
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters 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 Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Priority to PL13002777T priority Critical patent/PL2808442T3/pl
Priority to EP13002777.4A priority patent/EP2808442B1/fr
Priority to PCT/EP2014/001424 priority patent/WO2014191101A1/fr
Priority to CN201480030134.6A priority patent/CN105308239B/zh
Priority to BR112015029410-3A priority patent/BR112015029410B1/pt
Priority to US14/893,641 priority patent/US9885153B2/en
Publication of EP2808442A1 publication Critical patent/EP2808442A1/fr
Application granted granted Critical
Publication of EP2808442B1 publication Critical patent/EP2808442B1/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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • 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
    • 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 device for forming an extended nip between a mating roll and a shoe roll for treating a web, in particular a paper, board, tissue web or other fibrous web.
  • Such devices are used in particular in press sections and calenders use.
  • a wet press for dewatering fibrous webs is known in which an extended press zone is employed to substantially increase dewatering compared to other press rolls.
  • an extended press nip is formed due to a concave shape of the sliding surface of the sliding shoe through which the fiber web passes.
  • the circumferential band is held in a substantially cylindrical shape by attached to its end faces annular discs.
  • the shoe is attached to a shoe foot, which is connected via a pressure pad made of an elastic material, such as plastic or rubber, with a fixed yoke and against this guided by pins in the printing direction and across this is held positively.
  • a pressure pad made of an elastic material, such as plastic or rubber
  • the enclosed space of the pressure pad is fluid beaufschlagbar via lines, so that it is possible to vary the contact pressure of the shoe against the counter roll.
  • the pressure pad is arranged so that the force exerted on the shoe from the pressure pad resulting force passes through the second half of the press nip formed in the running direction of the roll circumference. As a result, a slow pressure increase is effected, which then drops rapidly at the end of the press zone, which is advantageous for a dewatering process.
  • the pressure pad can be divided axially into zones.
  • the disadvantage is that the pressure pad is made of an elastic material, e.g. Plastic or rubber, is susceptible to wear. The cost advantages of pressure pads over more complex load cylinder systems are therefore often lost due to shorter maintenance intervals.
  • the object of the invention is therefore to provide a device for forming an extended nip according to the preamble of claim 1, wherein the press shoe can be pressed via a fluidbeaufschlagbares pressure pad as Anpressü to the backing roll and the pressure pad works wear.
  • an apparatus for forming an extended nip in which all frictional effects between a punch-like portion of the press shoe and the pressure pad on the one hand and the groove-like chamber and the Pressure pad on the other hand be avoided.
  • the pressure pad can be deployed through the side guide of a rolling wall from a flat first profile to a higher second profile, whereby a lifting movement of the press shoe is performed.
  • the lifting movement allows the shifting of the press shoe relative to the roll shell and the setting of a pressing pressure in the extended nip.
  • the pressure pad is thus subject to significantly lower wear.
  • the fluid loading of the pressure pad according to the invention is virtually a Aufblasfluidbeetzung, wherein the roll wall always forms a rolled fold, which is maintained in all operating conditions.
  • the rolling behavior of the rolling wall makes it possible to guide a punch-like portion of the shoe which extends axially along a shoe length which is usually transverse to the machine direction (MD).
  • the pressure pad is made of a flexible material, which also forms the roll wall with a roll fold.
  • a further advantage is that the pressure pad is formed by a fluidbeaufschlagbaren flexible hose whose two cross-section superimposed material layers are so U-shaped inserted into the groove-like chamber, that the tube folds of the leg ends of the U-shaped inserted tube form the roll wall.
  • the roll wall is then integrally formed with the pressure pad, which also creates a simple and quick to install pressure pad.
  • a molded part can be provided with an end restrained rolling wall.
  • a plurality of pressure pads along a shoe width can be provided in the machine direction, each associated with a stamp-like portion of the press shoe. The adjustment of the line load along the press zone length of the extended nip is then variable.
  • the pressure pad can be axially divided into zones.
  • the stamp-like portion of the press shoe with different footprints can dip into the pressure pad (s).
  • An edge or edge relief of the press shoe is adjustable.
  • load cylinder devices can additionally be provided for this purpose with which the line load profile along the press zone in the extended nip can be varied.
  • Fig. 1a and Fig. 2a show the invention relates according to a first embodiment of an apparatus for forming an extended nip 1 between a backing roll 2 and a shoe roll 3 for treating a web.
  • the web is in particular a paper, board, tissue web or other fibrous web.
  • the shoe roll 3 has a carrier 4 and a rotatable about the support 4, flexible roll shell 5.
  • the carrier 4 is preferably formed as a fixed yoke.
  • the roll shell 5 is supported in the region of the extended nip 1 on a top surface 7 of a press shoe 6 guided on the support 4.
  • the press shoe 6 is supported on the carrier 4 so as to be able to generate a pressing pressure via at least one pressurizable pressurizable fluid chamber, here according to the first exemplary embodiment the pressure chambers 8, 9.
  • the pressure chamber 8, 9 is formed as a pressure pad 10, on which the press shoe 6 is supported on the back surface, wherein the pressure pad 10 in a groove-like chamber 11 is inserted.
  • the press shoe 6 has at least one stamp-like portion 12 or a foot on the back, which dips into at least one einstülpbares pressure pad 10 for the execution of strokes.
  • the pressure pad 10 is supported via a roll wall 13 forming pressure pad side wall at the groove-like chamber 11 from.
  • the pressure pad 10 is for this purpose made of a flexible material.
  • the roll wall 13 forms a rolled fold 14 between the punch-like portion 12 of the press shoe 6 and an inner side wall 15 of the groove-like chamber 11.
  • the rolling behavior of the roll wall 13 determines a Hubwegmother in the stroke direction.
  • a free height H of the groove-like chamber 11 should be at least half of the movement stroke of the press shoe 6 in the printing direction X, as Fig. 2c clarified.
  • a distance Y between the punch-like portion 12 of the press shoe 6 and the inner side wall 15 of the groove-like chamber 11 is selected such that the rolling wall 13 is pressed during displacement of the punch-like portion 12 in the stroke direction to the inner side wall 15 of the groove-like chamber 11.
  • a significant advantage of the pressure pad 10 is also that the force acting on the punch-like portion 12 pressure surface of the pressure pad 10 is independent of the strokes, such as Fig. 1a combined with Fig. 2a shows.
  • a pressure pad 10 is preferably a fluidbeaufschlagbarer flexible hose 16 is inserted into the axially extending groove-like chamber 11.
  • the two material layers 17, 18 of the tube 16, which are arranged one above the other in cross section, are inserted into the groove-like chamber 11 in a U-shaped manner in such a way that the tube folds of the leg ends of the tube inserted in a U-shape form the rolling wall 13.
  • the standing in a sliding engagement with the pressure pad 10 stamp-like portion 12 is enclosed in the execution of strokes of the tube 16 in cross-section U-shaped.
  • the tube 16 is preferably made of a fiber-reinforced plastic or a fiber-reinforced rubber compound.
  • the rolling wall 13 is then formed integrally with the tube 16.
  • the press shoe 6 is over at least one pressure, then, if according to Fig. 2a two pressure pads 10 are provided, two pressures P1 and P2, in the hoses 16 against the counter-roller 2 or a counter-element applied and pressed.
  • the chamber 11 high.
  • the pressures P1 and P2 can be set independently. Different pressure profiles can be adjusted in the extended nip 1.
  • the pressure pad 10 may be formed by a flexible mold part 19 which is clamped at the end at clamping points 20.
  • the press shoe 6 can be made split. This allows the construction of the press shoe 6 of layers 21, 22 of different materials. These layers 21, 22 may be guided in the machine direction (MD) to each other, for example by means of feather keys 23 or screws. The layer 21 may curve with respect to the layer 22 due to temperature differences. In the cross machine direction (CD), the layers 21, 22 can be freely displaceable. The same can also apply to the stamp-like sections 12 under the press shoe 6.
  • the press shoe 6 in the machine direction (MD) at least two spaced transversely to the machine direction extending punch-like portions 12, each associated with a groove-like chamber 11 with an inserted pressure pad 10 is.
  • the pressurization of the plurality of pressure pad 10 is preferably different.
  • Fig. 3a shows an embodiment with three pressure pad 10 from, for example, U-shaped inserted hoses 16.
  • the press shoe 6 can then be pressed over three punch-like portions 12 to the counter-roller 2 and a counter-element.
  • the pressure P2 is then, for example, a main working pressure, while the pressures P1 and P3 are pressures for MD profiling.
  • Fig. 3b and Fig. 3c show, the press shoe 6 on only a punch-like portion 12 with an associated pressure pad 10, here formed by a tube 16, are pressed.
  • Fig. 3b shows that the press shoe 6 is connected to the carrier 4 and compared with this guided by pins 31 in the printing direction X and is held transversely thereto via brackets 32. This applies correspondingly to the exemplary embodiments described above.
  • the axially extending hose 16 can have a lateral connection 27 for fluid admission 24 at the end.
  • this terminal 27 is round.
  • a support member 25 may be provided which prevents force from acting on the press shoe 6 from the free end of the hose.
  • Fig. 5 is the lateral connection 27, for example, rectangular or U-shaped as the tube 16 formed under the press shoe 6. The respective opposite end of the tube 16 may be formed accordingly.
  • Fig. 6 shows, the stamp-like portion 12 over the shoe length, ie in the cross machine direction (CD), with different sized footprints 26 in the respective pressure pad 10.
  • the footprint 26 of a punch-like portion 12 may be smaller at the edge than the center.
  • Fig. 7b to Fig. 7d show an example of a stamp-like section 12 (FIG. Fig. 7a ) in the cross machine direction (CD) the resulting line forces in the press zone of the press shoe 6.
  • the marginally smaller contact surfaces 26 lead in the edge region of the press shoe 6 to lower line loads than in the central region.
  • the reduction in effective pressure area may be, for example, 25%, such as Fig. 6 shows.
  • At least one separate force component F1, F2 can be assigned to the stamp-like section 12 with a smaller footprint 26 for increasing a local pressing force.
  • the attack of these additional force components F1, F2 is preferably between the exemplary two punch-like sections 12, as this Fig. 6 combined with Fig. 7a clarified.
  • With these additional force components can, as Fig. 7c shows, without the effect of / the pressure pad 10 only a line load can be set in the edge region.
  • Fig. 7d shows, can the edge relief according to Fig. 7b be balanced by the additional force components F1 and F2 on the same line load over the shoe length.
  • the additional force components F1 and F2 can apply such additional pressures, as in Fig. 8c illustrates, so that despite smaller footprints 26, the line loads are higher edge than in a central region for a punch-like portion 12 according to Fig. 8a ,
  • a cloth 28 may be inserted between the top surface 7 of the press shoe 6 and the roll shell 5 as wear protection.
  • This cloth 28 is preferably thermally loadable and may consist of a comparable material as the roll shell 5.

Landscapes

  • Paper (AREA)
  • Processing Of Meat And Fish (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP13002777.4A 2013-05-29 2013-05-29 Dispositif de formation d'une zone de pincement allongée Active EP2808442B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL13002777T PL2808442T3 (pl) 2013-05-29 2013-05-29 Urządzenie do tworzenia długiej szczeliny
EP13002777.4A EP2808442B1 (fr) 2013-05-29 2013-05-29 Dispositif de formation d'une zone de pincement allongée
PCT/EP2014/001424 WO2014191101A1 (fr) 2013-05-29 2014-05-27 Dispositif permettant de former une longue ligne de contact
CN201480030134.6A CN105308239B (zh) 2013-05-29 2014-05-27 用于构成纵长缝隙的设备
BR112015029410-3A BR112015029410B1 (pt) 2013-05-29 2014-05-27 Dispositivo para formação de uma fenda alongada e uso do dispositivo
US14/893,641 US9885153B2 (en) 2013-05-29 2014-05-27 Device for forming an extended nip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13002777.4A EP2808442B1 (fr) 2013-05-29 2013-05-29 Dispositif de formation d'une zone de pincement allongée

Publications (2)

Publication Number Publication Date
EP2808442A1 true EP2808442A1 (fr) 2014-12-03
EP2808442B1 EP2808442B1 (fr) 2015-11-18

Family

ID=48569918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13002777.4A Active EP2808442B1 (fr) 2013-05-29 2013-05-29 Dispositif de formation d'une zone de pincement allongée

Country Status (6)

Country Link
US (1) US9885153B2 (fr)
EP (1) EP2808442B1 (fr)
CN (1) CN105308239B (fr)
BR (1) BR112015029410B1 (fr)
PL (1) PL2808442T3 (fr)
WO (1) WO2014191101A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022122369A1 (fr) * 2020-12-07 2022-06-16 Valmet Ab Procédé de fabrication d'un agencement de corps de support, et agencement de corps de support

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE542214C2 (en) 2018-10-12 2020-03-10 Valmet Oy A tissue paper making machine and a method of operating a tissue paper making machine
JP2023546243A (ja) 2020-10-21 2023-11-01 バルメット、アクチボラグ ヤンキー乾燥シリンダ、およびティッシュペーパー製造機械

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713147A (en) 1982-05-05 1987-12-15 Oy Tampella Ab Extended nip press with displaceable center of gravity for the supporting force
DE3030233C2 (de) 1980-08-09 1988-10-20 J.M. Voith Gmbh, 7920 Heidenheim Naßpresse zum Entwässern von Faserbahnen
EP1505204A1 (fr) * 2003-08-07 2005-02-09 Voith Paper Patent GmbH Dispositif de traitement d'une bande
WO2005042834A1 (fr) * 2003-10-31 2005-05-12 Voith Paper Patent Gmbh Dispositif de pression

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI100897B (fi) * 1993-11-05 1998-03-13 Valmet Paper Machinery Inc Paperikoneen imutelan imulaatikon tiivistysrakenne ja menetelmä imutel an tiivistekäytössä
FI971164A (fi) * 1997-03-20 1998-09-21 Valmet Corp Taipumakompensoitu tela
AT412218B (de) * 2002-10-17 2004-11-25 Andritz Ag Maschf Presswalze
SE526787C2 (sv) * 2003-10-21 2005-11-01 Metso Paper Karlstad Ab Elastiskt derformerbar stödkropp för en anordning med förlängt nyp för behandling av fiberbana och användning av sådan stödkropp
US7527708B2 (en) * 2003-10-21 2009-05-05 Metso Paper Karlstad Ab Support body, holding device therefor, apparatus with said body for treatment of a web, and methods of forming an extended nip in the apparatus and controlling load in the nip
DE102007018528A1 (de) * 2007-04-19 2008-10-23 Voith Patent Gmbh Papiermaschine
DE102008042087A1 (de) * 2008-09-15 2010-03-18 Voith Patent Gmbh Anpresseinheit für eine Papier-, Karton- oder Tissuemaschine
CN103502530B (zh) * 2011-02-18 2016-03-02 维美德瑞典公司 具有扩展压区的压榨装置、造纸机及操作压榨装置的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030233C2 (de) 1980-08-09 1988-10-20 J.M. Voith Gmbh, 7920 Heidenheim Naßpresse zum Entwässern von Faserbahnen
US4713147A (en) 1982-05-05 1987-12-15 Oy Tampella Ab Extended nip press with displaceable center of gravity for the supporting force
US4713147B1 (en) 1982-05-05 1996-12-31 Valmet Paper Machinery Inc Extended nip press with displaceable centre of gravity for the supporting force
US4713147B2 (en) 1982-05-05 1997-11-04 Valmet Paper Machinery Inc Extended nip press with displaceable center of gravity for the supporting force
EP1505204A1 (fr) * 2003-08-07 2005-02-09 Voith Paper Patent GmbH Dispositif de traitement d'une bande
WO2005042834A1 (fr) * 2003-10-31 2005-05-12 Voith Paper Patent Gmbh Dispositif de pression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022122369A1 (fr) * 2020-12-07 2022-06-16 Valmet Ab Procédé de fabrication d'un agencement de corps de support, et agencement de corps de support

Also Published As

Publication number Publication date
BR112015029410A2 (pt) 2017-07-25
CN105308239A (zh) 2016-02-03
US9885153B2 (en) 2018-02-06
US20160108579A1 (en) 2016-04-21
EP2808442B1 (fr) 2015-11-18
WO2014191101A1 (fr) 2014-12-04
CN105308239B (zh) 2017-08-15
PL2808442T3 (pl) 2016-05-31
BR112015029410B1 (pt) 2021-12-14

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