EP1643033A2 - 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
EP1643033A2
EP1643033A2 EP05107510A EP05107510A EP1643033A2 EP 1643033 A2 EP1643033 A2 EP 1643033A2 EP 05107510 A EP05107510 A EP 05107510A EP 05107510 A EP05107510 A EP 05107510A EP 1643033 A2 EP1643033 A2 EP 1643033A2
Authority
EP
European Patent Office
Prior art keywords
shoe
press
roll
pressing device
press 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.)
Granted
Application number
EP05107510A
Other languages
German (de)
English (en)
Other versions
EP1643033B2 (fr
EP1643033A3 (fr
EP1643033B1 (fr
Inventor
Andreas SCHÜTTE
Christoph Strempfl
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35229654&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1643033(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Patent GmbH, Voith Paper 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
Application granted granted Critical
Publication of EP1643033B1 publication Critical patent/EP1643033B1/fr
Publication of EP1643033B2 publication Critical patent/EP1643033B2/fr
Not-in-force 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 device in a press section of a machine for producing a paper, cardboard, tissue or another fibrous web with a press shoe comprising a shoe press roll and a counter roll, wherein on the shoe press roll, a roll shell of end caps is guided over the press shoe.
  • a press section for a paper machine is known by way of example.
  • the press section has two pressing points, which are each formed by a press roller 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) with a rotating shell 2 and a fixed press shoe 3 is provided. 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. This leads to a distance s (FIG.
  • the edge region of the shell of the shoe press roll is deformed to different degrees when passing through the area of the press shoe, since it is rigidly guided on one circular path through the front disk, on the other hand is pushed through 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.
  • this object is achieved in a pressing device of the type mentioned above in that the press shoe is set back with its front end and / or with its rear end by more than 5 mm relative to the lateral surface of the shoe press roll in the direction of the counter roll.
  • the deflection or deformation of the roll shell is greatly reduced.
  • a press shoe with a long length, for example, of more than 300 mm, as used for example for the production of wood-free paper, such as cardboard and packaging paper, to produce a broad press nip, so that there is no such strong surface pressure and the volume of Paper is not reduced too much the invention can be used to 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 at its front and / or rear end is set back by up to 5 mm with respect to the circular contour of the roll shell or projects up to 50 mm beyond the circular contour.
  • 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.
  • 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 inlet-side wedge is formed by a radius of curvature of the inlet-side bead that reduces in the direction of the lateral surface of the roller shell, so that the For example, shoe inlet surface has two different radii of curvature.
  • the invention also relates to a pressing device in a press section of a machine for producing a paper, board, tissue or other fibrous web with a press shoe comprising a shoe press roll and a counter roll, wherein guided on the shoe press roll a roll shell of end caps on the press shoe is, in which the lateral distance of the end cover of the shoe press roll from the press shoe in the axial direction in each case at least 300 mm, in particular 330 mm or more. Also by this measure, the load of the roll shell due to the deflection or deformation is reduced when passing through the press shoe, as the strain or stress in the direction of the longitudinal axis of the shoe press roll distributed over a greater length of the roll shell. This measure can also be realized in conjunction with the features of the invention described above.
  • the invention also relates to a pressing device in a press section of a machine for producing a paper, cardboard, tissue or other fibrous web with a press shoe comprising a shoe press roll and a counter roll, wherein on the shoe press roll, a roll shell of end caps is guided over the press shoe , wherein the diameter of the counter roll is at least 0.975 times the diameter of the shoe press roll.
  • a press shoe comprising a shoe press roll and a counter roll
  • the diameter of the counter roll is 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 press shoe 11 with an inlet-side bead 12 is arranged in such a way that the bead 12 has a circular contour 13 fictitious in the region of the press shoe 11, the end disks leading to the contour of a roll shell 14 (not shown here) corresponds to the shoe press roll 10 (position A) (this is defined in Fig. 2b as a negative direction y), while the press shoe 11 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 is reset (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 backing roll 15 has been increased by an amount R 1 (ie, the displacement shown in FIG. 2a) in the radial direction R to reduce the shell indentation.
  • R 1 the displacement shown in FIG. 2a
  • 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.
  • a press shoe 21 protrudes at its front end (position A) like the press shoe 11 from the circular contour 13, while the press shoe 21 at its rear end (position D) projects with the position of the circular contour 13, which means that a guided over the shoe press roll 20 roll shell 22 is no longer stretched at this point.
  • Fig. 3b is shown how between the edge 23 of the press shoe 21 and the inner edge 24, an elongation of the roll shell 22 on the existing between the edge 23 and the inner edge 24 distance s, wherein Z A , Z B , Z C and Z D respectively denote the offset of the press shoe 21 with respect to the circular contour 13.
  • Z A , Z B , Z C and Z D respectively denote the offset of the press shoe 21 with respect to the circular contour 13.
  • the input side bead 12 of the press shoe 11 is provided with a convergent wedge in one embodiment of the invention (FIG. 4) forms 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.
  • bores 27 are present inside the input-side bead 12 of the press shoe 11, via which oil or another lubricant is supplied into the region between the press shoe 11 and the roll shell 14 in order 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 strip 28 which serves to stabilize the roll mantle 14.
  • Such support strips 28 may be distributed within the shoe press roll 10 at several points over the circumference.
  • 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.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
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 true EP1643033A2 (fr) 2006-04-05
EP1643033A3 EP1643033A3 (fr) 2006-10-18
EP1643033B1 EP1643033B1 (fr) 2008-01-23
EP1643033B2 EP1643033B2 (fr) 2011-09-14

Family

ID=35229654

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

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

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0389675A2 (fr) * 1989-03-25 1990-10-03 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Bande de pressage pour une installation de pressage
US5643416A (en) * 1996-06-07 1997-07-01 Beloit Technologies, Inc. Extended nip press with oscillating blanket for extended wear
DE19802853A1 (de) * 1998-01-26 1999-07-29 Voith Sulzer Papiertech Patent Pressenanordnung
US5935385A (en) * 1996-04-19 1999-08-10 Voith Sulzer Papiermaschinen Gmbh Press device with oil aspiration device
US6136154A (en) * 1996-10-11 2000-10-24 Voith Sulzer Papiermaschinen Gmbh Press section
US20020060048A1 (en) * 2000-08-31 2002-05-23 Voith Paper Patent Gmbh Pressing arrangement
US20020096302A1 (en) * 1999-12-23 2002-07-25 Voith Paper Patent Gmbh Press section
WO2003035978A1 (fr) * 2001-10-25 2003-05-01 Metso Paper, Inc. Procede de traitement d'une bande de papier ou de carton et dispositif de traitement d'une bande de papier ou de carton
US6638395B1 (en) * 1999-07-24 2003-10-28 Voith Sulzer Papiertechnik Patent Gmbh Paper machine and process
EP1431453A1 (fr) * 2002-12-19 2004-06-23 Voith Paper Patent GmbH Calandre à pinçage allongé
US20040173107A1 (en) * 2002-12-17 2004-09-09 Eduard Kusters Maschinenfabrik Gmbh & Co. Apparatus for forming an extended nip

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0389675A2 (fr) * 1989-03-25 1990-10-03 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Bande de pressage pour une installation de pressage
US5935385A (en) * 1996-04-19 1999-08-10 Voith Sulzer Papiermaschinen Gmbh Press device with oil aspiration device
US5643416A (en) * 1996-06-07 1997-07-01 Beloit Technologies, Inc. Extended nip press with oscillating blanket for extended wear
US6136154A (en) * 1996-10-11 2000-10-24 Voith Sulzer Papiermaschinen Gmbh Press section
DE19802853A1 (de) * 1998-01-26 1999-07-29 Voith Sulzer Papiertech Patent Pressenanordnung
US6638395B1 (en) * 1999-07-24 2003-10-28 Voith Sulzer Papiertechnik Patent Gmbh Paper machine and process
US20020096302A1 (en) * 1999-12-23 2002-07-25 Voith Paper Patent Gmbh Press section
US20020060048A1 (en) * 2000-08-31 2002-05-23 Voith Paper Patent Gmbh Pressing arrangement
WO2003035978A1 (fr) * 2001-10-25 2003-05-01 Metso Paper, Inc. Procede de traitement d'une bande de papier ou de carton et dispositif de traitement d'une bande de papier ou de carton
US20040173107A1 (en) * 2002-12-17 2004-09-09 Eduard Kusters Maschinenfabrik Gmbh & Co. Apparatus for forming an extended nip
EP1431453A1 (fr) * 2002-12-19 2004-06-23 Voith Paper Patent GmbH Calandre à pinçage allongé

Also Published As

Publication number Publication date
DE102004048156A1 (de) 2006-04-06
DE502005002629D1 (de) 2008-03-13
EP1643033B2 (fr) 2011-09-14
ES2298944T3 (es) 2008-05-16
EP1643033A3 (fr) 2006-10-18
EP1643033B1 (fr) 2008-01-23
ATE384823T1 (de) 2008-02-15
PL1643033T5 (pl) 2012-02-29
PL1643033T3 (pl) 2008-06-30

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