EP1643033B2 - Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse - Google Patents

Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse Download PDF

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Publication number
EP1643033B2
EP1643033B2 EP05107510A EP05107510A EP1643033B2 EP 1643033 B2 EP1643033 B2 EP 1643033B2 EP 05107510 A EP05107510 A EP 05107510A EP 05107510 A EP05107510 A EP 05107510A EP 1643033 B2 EP1643033 B2 EP 1643033B2
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EP
European Patent Office
Prior art keywords
press
shoe
roll
section according
shell
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Not-in-force
Application number
EP05107510A
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German (de)
English (en)
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EP1643033B1 (fr
EP1643033A3 (fr
EP1643033A2 (fr
Inventor
Andreas SCHÜTTE
Christoph Strempfl
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Voith Patent GmbH
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Voith Patent GmbH
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to PL05107510T priority Critical patent/PL1643033T5/pl
Publication of EP1643033A2 publication Critical patent/EP1643033A2/fr
Publication of EP1643033A3 publication Critical patent/EP1643033A3/fr
Publication of EP1643033B1 publication Critical patent/EP1643033B1/fr
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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 press section of a machine for producing a paper, cardboard, tissue or other fibrous web with a pressing device comprising a press shoe comprising a shoe press roll and, with this a press nip forming counter roll, wherein on the shoe press roll a roll shell of end caps on the press shoe is led around.
  • Such a press section is for example from the EP-A-0 389 675 known.
  • a press section for a paper machine which has two press points, each formed by a press roll cooperating with a shoe press roll.
  • a first upper felt, the paper web coming from a forming wire, an underfelt and a press jacket of a first shoe press roll pass through the first press point.
  • the underfelt continues with the paper web to the second press site. Together with a second top felt and a press jacket of a second press site, the paper web then passes through the second press site.
  • the paper web follows the underfelt further up to a take-off roll, through which it is transferred to a first dryer wire which transfers the paper web to the dryer section.
  • a shoe press roll 1 ( Fig. 1a ) provided with a rotating jacket 2 and a fixed press shoe 3. This forms together with a counter-roller 4 a press nip, through which the fibrous web is passed in the direction of an arrow P to withdraw their water.
  • a shoe press roll 1 and the counter roll 4 are shown in the operating position in cross section.
  • the press shoe 3 is opposite the contour formed by the jacket 2 in the remaining area of the shoe press roll 1 at a position A at its front edge by an amount y A and at positions designated B, C and D respectively by amounts y B , y C and y D set back relative to the circular contour of the shoe press roll 1, ie, the press shoe 3 is set back over its entire length in the web running direction relative to the circular contour formed by the end disks.
  • a distance s (extending in the axial direction of the shoe press roll 1) Fig.
  • edge region of the shell of the shoe press roll is deformed differently when passing through the area of the press shoe, since it is rigidly guided on a circular path through the face plate on the one hand, on the other hand pushed by the counter roll in the facing this shoe contour.
  • the deformation and the stresses resulting therefrom in the roll shell result in alternating stresses which limit the life of the shell and reduce it especially with increasing paper machine speeds.
  • the load on the roll shell is reduced as a result of the deflection or deformation when passing through the press shoe, since the expansion or stress in the direction of the longitudinal axis of the shoe press roll distributed over a greater length of the roll shell.
  • the press shoe is preferably set back with its front end and / or with its rear end with a closed press nip at most 5 mm in relation to the circular contour of the roll mantle corresponding to the contour of the end cover.
  • the deflection or deformation of the roll shell is greatly reduced. This applies regardless of the length of the press shoe in the machine direction.
  • a press shoe with a long length, of more than 300 mm, as used for example for producing wood-free paper, for example cardboard and packaging paper in order to produce a broad press nip, so that there is no such strong surface pressure and the volume of the paper is not reduced too much to use the invention with advantage.
  • the press section is formed in this case, for example by a tandem Nipcoflex press with two press nips and can also be used at higher operating speeds according to the invention.
  • the press shoe extends beyond the circular contour by up to 50 mm at its front and / or rear end.
  • the press shoe in the web running direction of the fibrous web has a length of 300 mm or more, in particular of more than 350 mm, in particular of more than 400 mm.
  • the effect of the length of the press shoe on the deflection or deformation of the roll shell is also reduced by the fact that the largest possible diameter of the shoe press roll and the counterpressure roll are used in relation to the length of the press shoe in the web running direction.
  • the ratio of the diameter of the shoe press roll to the length of the press shoe in the direction of rotation is 4.0 or more, and the ratio of the diameter of the backing roll to the length of the press shoe is 3.9 or more. According to the invention, such a ratio can generally be used in press devices in a machine for producing a fibrous web.
  • y 1 is the smallest deviation
  • y 2 denotes the value by which the press shoe in its central region relative to the circular contour the shoe press roll is set back (maximum insertion dimension)
  • s denotes the respective lateral spacing of the end cover from the press shoe in the axial direction and that the value (K 3 ) is less than 1.07, in particular less than 1.02, very particularly less than 1.007 , is.
  • a support strip is used within the shoe press roll in the direction of rotation in front of the press shoe, which preferably extends over the entire width of the shoe press roll.
  • the press shoe on the inlet side is provided with a bead, in which the means, in particular in the form of arranged over the entire width of the press shoe holes, is integrated.
  • the oil lines may preferably end in lubrication pockets or communicate with protrusions in the interior of the press shoe in which the oil collects.
  • the inlet-side contour forms a convergent wedge between the lateral surface of the roll shell and the inlet side, the shell-facing surface of the press shoe.
  • the diameter of the counter roll is preferably at least 0.975 times the diameter of the shoe press roll. This has for example a diameter of 1200 mm.
  • the counter roll in this case has at least a diameter of 1170 mm.
  • a shoe press roll 10 ( Fig. 2a ) is a press shoe 11 with an inlet-side bead 12 arranged such that the bead 12 via a fictitious in the area of the press shoe 11 circular contour 13, the contour of a roll shell 14 entraining (not shown here) end plates of the shoe press roll 10 protrudes (position A) (this is in Fig. 2b defined as negative direction y), while the press shoe 11 is set back in its central region (positions B and C) and at its outlet end (position D) with respect to the contour of the roll mantle 14 (positive y values for the positions B, C, D).
  • A is the beginning of the press nip.
  • the distance between the centers of the shoe press roll 10 and the counter roll 15 by an amount R 1 ie, the in Fig. 2a shown displacement
  • R 1 the in Fig. 2a shown displacement
  • the run of the roll mantle 14 at the press shoe edge of the press shoe 11 is characterized.
  • the illustration shows the deformation of the roll mantle 14 over the region between the side edge 16 of the press shoe 11 and the inner edge 17 of the end disk in the direction of the longitudinal axis of the shoe press roll 10 by amounts y A , y B , y C and y D, respectively.
  • the shoe press roll 10 is mounted substantially above the counter roll 15. Compared to the vertical their center is usually offset by an amount e relative to the center of the counter-roller 15.
  • Fig. 3b It is shown how between the edge 23 of the press shoe 21 and the inner edge 24, an elongation of the roll shell 22 over the existing between the edge 23 and the inner edge 24 distance s, wherein z A , Z B , Z C and Z D respectively Designate offset of the press shoe 21 relative to the circular contour 13. If the distance between the edges 23 and 24 is doubled to the amount of 2 s (at a distance between the edge 23 and an edge 24 '), the stretch of the roll mantle 22 will be distributed twice as long, and therefore will experience only one about half as much stretching or bending. For the purposes of the invention, therefore, the aim is to choose the distance between the edge of the press shoe and the inner edge of the end disk as large as possible.
  • Fig. 4 To reduce the surface pressure between the press shoe 11 and the roll shell 14 according to Fig. 2a (or the roll shell 22 according to Fig. 3a ) is in one embodiment of the invention ( Fig. 4 ) provided that the input-side bead 12 of the press shoe 11 forms a convergent wedge between the roll shell 14 and the shoe inlet surface. This prevents the squeezing of the oil film.
  • the bead radii of curvature R 2 and R 1 which shrink in the direction of the roll shell 14. It is understood that the value of the radius of curvature R 2 can also be continuous or via a plurality of intermediate values in the radius of curvature R 1 . In this way, a convergent inlet gap 25 is formed between the roll shell 14 and the press shoe 11. The friction between the press shoe 11 and the roll shell 14 is reduced by the use of an oil film 26 applied to the roll shell 14.
  • a further embodiment are provided within the input-side bead 12 of the press shoe 11 holes 27, through the oil or other lubricant in the area between the press shoe eleventh and the roll shell 14 is fed to reduce the friction.
  • the holes 27 are arranged distributed over the entire width of the press shoe 11 and communicate with oil pressure lines, which ensure forced lubrication.
  • the bores 27 may optionally terminate in pockets in which reservoirs for the lubricant are formed.
  • the dashed line 14 ' shows the circular contour or the course, the roll shell 14 would take without the introduced into the interior of the shoe press roll 10 press shoe 11.
  • a support bar 28 which serves to stabilize the roll shell 14.
  • Such support strips 28 may be distributed within the shoe press roll 10 at several points over the circumference.
  • On the support strips 28 also nozzles for spraying an oil film can be arranged on the inside of the roll shell 14.
  • the support strip can also extend continuously over the entire width of the shoe press roll 10 in the axial direction. The support strip causes a smooth inlet of the oil film between the roll shell 14 and the press shoe 11 is achieved.
  • oil can also be sprayed by means of an oil spray pipe in the direction of the inlet of the press shoe and / or the support bar.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (12)

  1. Section de presse d'une machine de fabrication d'une bande de papier, de carton, d'essuie-tout ou d'une autre matière fibreuse avec un dispositif de pressage comprenant un cylindre de presse à sabot (10, 20) comportant un sabot de pressage (11, 21), et un contre-cylindre (15) formant avec celui-ci une ligne de pressage, dans laquelle une enveloppe de cylindre (14, 22) est enroulée sur le cylindre de presse à sabot (10, 20) depuis des couvercles frontaux au-dessus du sabot de presse (11, 21), caractérisée en ce que la distance latérale (s) des couvercles frontaux du cylindre de presse à sabot (10, 20) par rapport au sabot de presse (11, 21) en direction axiale vaut chaque fois au moins 300 mm, en particulier 330 mm ou davantage, en ce que le sabot de presse (11, 21) est situé en retrait avec son extrémité avant et/ou son extrémité arrière, lorsque la ligne de pressage est fermée, de 5 mm au maximum par rapport au contour circulaire (13) de l'enveloppe de cylindre correspondant au contour des couvercles frontaux, et en ce que le sabot de presse (11, 21) présente, dans la direction de défilement de la bande de matière fibreuse, une longueur de 300 mm ou davantage.
  2. Section de presse selon la revendication 1, caractérisée en ce que le sabot de presse (11, 21) dépasse, avec son extrémité avant et/ou son extrémité arrière, d'une distance allant jusqu'à 50 mm au-delà du contour circulaire (13).
  3. Section de presse selon l'une quelconque des revendications 1 et 2, caractérisée en ce que le sabot de presse (11, 21) présente, dans la direction de défilement de la bande de matière fibreuse, une longueur de plus de 350 mm, et en particulier de plus de 400 mm.
  4. Section de presse selon l'une quelconque des revendications 1 à 3 plus particulièrement, caractérisée en ce que le rapport du diamètre du cylindre de presse à sabot (10, 20) à la longueur du sabot de presse (11, 21) dans le sens de la rotation vaut 4,0 ou davantage et le rapport du diamètre du contre-cylindre (15) à la longueur du sabot de presse (11, 21) vaut 3,9 ou davantage.
  5. Section de presse selon l'une quelconque des revendications 2 à 4, caractérisée en ce que la mesure de l'allongement de l'enveloppe de cylindre du cylindre de presse à sabot (10, 20) par suite du dépassement du sabot de presse (11, 21) au-delà du contour circulaire (13) ou de l'enveloppe de cylindre, est donnée par la valeur K s = 1 + y 2 / s 2 / 1 + y 1 / s 2 ,
    Figure imgb0005
    dans laquelle y1 désigne la plus petite mesure de l'empreinte du sabot de presse, en particulier la mesure de l'empreinte au point d'attaque du sabot de presse (11, 21) à son arrivée, par rapport au contour circulaire du cylindre de presse à sabot (10, 20), dans laquelle y2 désigne la mesure maximale de l'empreinte, en particulier la mesure de l'empreinte dont le sabot de presse (11, 21) est situé en retrait, dans sa région centrale, par rapport au contour circulaire (13) du cylindre de presse à sabot (10, 20), et dans laquelle s désigne la distance latérale respective des couvercles frontaux par rapport au sabot de presse (11, 21) en direction axiale, et en ce que la valeur (Ks) est inférieure à 1,07, en particulier inférieure à 1,02, et de préférence encore inférieure à 1,007.
  6. Section de presse selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le cylindre de presse à sabot (10, 20) présente, avant le sabot de presse (11, 21) dans la direction de rotation, une règle d'appui (28), qui s'étend de préférence sur toute la largeur du cylindre de presse à sabot (10, 20).
  7. Section de presse selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'un moyen pour amener de l'huile sur la région avant du sabot de presse (11, 21) est disposé à l'intérieur du cylindre de presse à sabot (10, 20).
  8. Section de presse selon la revendication 7, caractérisée en ce que le moyen est disposé avant le sabot de presse (11, 21), en particulier sur la règle d'appui (28).
  9. Section de presse selon la revendication 7, caractérisée en ce que le moyen est intégré dans un bourrelet (12) côté entrée du sabot de presse (11, 21), en particulier sous la forme de perçages (27) disposés sur toute la largeur du sabot de presse (11, 21).
  10. Section de presse selon la revendication 9, caractérisée en ce que le contour présente, côté entrée, un coin convergent entre la surface latérale de l'enveloppe de cylindre (14, 22) et la surface, côté entrée, du sabot de presse (11, 21) tournée vers l'enveloppe.
  11. Section de presse selon la revendication 10, caractérisée en ce que le coin côté entrée est formé par un rayon de courbure (R1, R2) du bourrelet (12) côté entrée, qui diminue en direction de la surface latérale de l'enveloppe de cylindre (14, 22).
  12. Section de presse selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le diamètre du contre-cylindre (15) vaut au moins 0,975 fois le diamètre du cylindre de presse à sabot (10, 20).
EP05107510A 2004-10-02 2005-08-16 Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse Not-in-force EP1643033B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05107510T PL1643033T5 (pl) 2004-10-02 2005-08-16 Urządzenie prasujące w części prasowej maszyny do wytwarzania pasma włóknistego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004048156A DE102004048156A1 (de) 2004-10-02 2004-10-02 Pressvorrichtung in einer Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn

Publications (4)

Publication Number Publication Date
EP1643033A2 EP1643033A2 (fr) 2006-04-05
EP1643033A3 EP1643033A3 (fr) 2006-10-18
EP1643033B1 EP1643033B1 (fr) 2008-01-23
EP1643033B2 true EP1643033B2 (fr) 2011-09-14

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EP05107510A Not-in-force EP1643033B2 (fr) 2004-10-02 2005-08-16 Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse

Country Status (5)

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EP (1) EP1643033B2 (fr)
AT (1) ATE384823T1 (fr)
DE (2) DE102004048156A1 (fr)
ES (1) ES2298944T3 (fr)
PL (1) PL1643033T5 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909936A1 (de) * 1989-03-25 1990-09-27 Oberdorfer Fa F Verfahren und vorrichtung zum herstellen eines undurchlaessigen und biegsamen bandes oder schlauches
DE19615654A1 (de) * 1996-04-19 1997-10-23 Voith Sulzer Papiermasch Gmbh Pressenanordnung
US5643416A (en) * 1996-06-07 1997-07-01 Beloit Technologies, Inc. Extended nip press with oscillating blanket for extended wear
DE19642046A1 (de) * 1996-10-11 1998-04-16 Voith Sulzer Papiermasch Gmbh Pressenpartie
DE19802853A1 (de) * 1998-01-26 1999-07-29 Voith Sulzer Papiertech Patent Pressenanordnung
DE19934875A1 (de) * 1999-07-24 2001-01-25 Voith Paper Patent Gmbh Papiermaschine
DE19962706A1 (de) * 1999-12-23 2001-06-28 Voith Paper Patent Gmbh Pressenpartie
DE10042906A1 (de) * 2000-08-31 2002-03-14 Voith Paper Patent Gmbh Pressenanordnung
FI116734B (fi) * 2001-10-25 2006-02-15 Metso Paper Inc Menetelmä paperi- tai kartonkirainan käsittelemiseksi ja paperi- tai kartonkirainan käsittelylaite
DE10259232A1 (de) * 2002-12-17 2004-07-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Vorrichtung zum Bilden eines Langspalts
DE10259442C5 (de) * 2002-12-19 2008-01-03 Voith Patent Gmbh Breitnip-Kalander

Also Published As

Publication number Publication date
ES2298944T3 (es) 2008-05-16
EP1643033B1 (fr) 2008-01-23
EP1643033A3 (fr) 2006-10-18
EP1643033A2 (fr) 2006-04-05
DE102004048156A1 (de) 2006-04-06
PL1643033T5 (pl) 2012-02-29
DE502005002629D1 (de) 2008-03-13
ATE384823T1 (de) 2008-02-15
PL1643033T3 (pl) 2008-06-30

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