EP0745725A2 - Presse à rouleaux - Google Patents

Presse à rouleaux Download PDF

Info

Publication number
EP0745725A2
EP0745725A2 EP96108438A EP96108438A EP0745725A2 EP 0745725 A2 EP0745725 A2 EP 0745725A2 EP 96108438 A EP96108438 A EP 96108438A EP 96108438 A EP96108438 A EP 96108438A EP 0745725 A2 EP0745725 A2 EP 0745725A2
Authority
EP
European Patent Office
Prior art keywords
roll
press
counter
roller
support
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
EP96108438A
Other languages
German (de)
English (en)
Other versions
EP0745725A3 (fr
EP0745725B1 (fr
Inventor
Rainer Bentele
Christian Schiel
Wolf Gunter Stotz
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 Sulzer Papiermaschinen 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 Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0745725A2 publication Critical patent/EP0745725A2/fr
Publication of EP0745725A3 publication Critical patent/EP0745725A3/fr
Application granted granted Critical
Publication of EP0745725B1 publication Critical patent/EP0745725B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21F3/0218—Shoe presses
    • 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
    • D21F3/04—Arrangements thereof
    • 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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip

Definitions

  • the invention relates to a roller press or the like, consisting of at least three rollers forming a plurality of press nips, according to the preambles of claims 1, 3 or 9, as used, for example, in the dewatering or smoothing of a fibrous web.
  • the invention is therefore based on the object of providing a roller press which, even without deflection control, enables a largely uniform press nip between the counter roller and at least one further roller.
  • the roller press or the like consists of at least three rollers forming a plurality of press nips for the treatment of a material web, of which a press roller consists of a very flexible roller jacket rotatable about a fixed support, which is mounted on the support via at least one support element, which is a has concave support surface ensuring a wide press nip with the cylindrical counter roll, the counter roll forming at least one press nip with a roll not controlled by deflection.
  • the invention offers three independent solutions which can also be used in combination with one another. All of these have in common that the roll shell of the counter roll is axially reinforced in the central region towards the further roll. This can be achieved in that, on the one hand, the outer circumference of the roll shell of the counter-roller decreases from the center of the roller in the axial direction towards the roller ends and / or in that the counter-roller also consists of a roller shell which can be rotated about a fixed support and has at least one Support element is mounted on the carrier.
  • the support element of the counter roll acts exactly towards the press roll or the directions of action of the opposing support elements of the press roll and the counter roll are aligned with one another or the support element of the counter roll is inclined from the press plane formed with the press roll, if the other rolls in the semicircular area opposite the press nip between the counter roll and the press roll (based on the roll cross-section) of the counter roll, an increased deflection of the counter roll in the axially central area to the other roll is preferably achieved by the opposing supporting elements of the press roll and the counter roll are designed and / or acted upon in such a way that there is a greater contact pressure of the press roller compared to the contact pressure exerted by the counter roll.
  • the opposing support elements of the press and the counter-roller are preferably connected individually, in groups or as a whole to a common fluid pressure line, with devices which reduce the fluid pressure and / the size ratio of the support surfaces of the opposing support elements being the greater the contact pressure compared to the contact pressure emanating from the counter-roller the press roll is guaranteed. This is due to the fact that the ends of the roll shell of the counter roll are radially immovable relative to the carrier.
  • the circumference of the roll shell of the counter roll, starting from the roll center decreases in the axial direction towards the roll ends
  • the circumference of the roll shell of the press roll and / or that of the press roll and another press nip forming roller from the roller center in the axial direction towards the roller ends also preferably reduced to the same extent. This allows the extent of the circumferential reduction to be kept to a minimum, so that the speed differences on the roll surface, viewed in the axial direction, are reduced. This also minimizes or eliminates speed differences on the roll surface between the corresponding rolls.
  • the angle of inclination should be between 2 and 15, preferably between 4 and 8 degrees.
  • the angle, starting from the roller center changes in the axial direction towards the roller ends, in particular tends to decrease.
  • the roller press consists of three rollers arranged approximately one above the other and supported in a frame (not shown), which form two press nips 1 and 15 for treating a material web 2. While the press roll 3 is located exactly above the counter roll 8, the third roll 14, which is designed as a suction roll, is offset from the counter roll 8 to this press plane. In order to make this roller press particularly suitable for dewatering a fibrous web, dewatering felts 16 run through the press nips 1 and 15 in addition to the material web 2 for receiving the squeezed water.
  • the press roll 3 consists of a very flexible roll shell 5 which can be rotated about a fixed support 4 and which is mounted on the support 4 via a hydraulic support element 6 in the form of an axially extending strip, the support element 6 having a concave support surface 7.
  • a hydraulic support element 6 in the form of an axially extending strip
  • the support element 6 having a concave support surface 7.
  • the gap between the support surface 7 and the inner surface of the roll shell 5 can be lubricated hydrostatically and / or hydrodynamically.
  • a relatively wide press nip 1 with the approximately cylindrical counter-roller 8 is formed by the concave support surface 7.
  • This also consists of a roll shell 9 which is rotatable about a fixed support 10 and which is supported on this by means of a plurality of support elements 11. So that a press nip 15 which is as uniform as possible is formed between the counter-roller 8 and the third roller 14, the outer circumference of the roller shell 9 of the counter-roller 8 decreases, starting from the roller center, in the axial direction towards the roller ends, so that the third roller sags 14 can be followed even with large roller widths.
  • roller shells 5, 9 thermally from the inside, for example via the lubricating fluid of the support elements 6, 11, and / or outside, for example inductively, and thus bring about a change in circumference.
  • the direction of action of the support elements 11 is slightly by an angle ⁇ , which is between 2 and 15, preferably 4 and 8 degrees, from the press plane formed with the press roll 3 to that with the counter roll 8 further press nip 15 forming roller 14 inclined. Since the roller jacket 9 of the counter roller 8 is fixed at the ends via bearings on the carrier 10, the deformation of the roller jacket 9 of the counter roller 8 resulting from the inclination of the support elements 11 has a particularly strong effect in the central region, so that the roller jacket 9 is there deformed more towards the third roller 14. This effect becomes even more pronounced when the angle ⁇ , starting from the center of the roll, decreases in the axial direction towards the ends of the roll.
  • the fluid supply of the support elements 6 and 11 of the press and counter roller 3, 8 is carried out simply via a common fluid pressure line 12, a throttle being located between the fluid pressure line 12 and the support elements 11 of the counter roller 8.
  • a throttle being located between the fluid pressure line 12 and the support elements 11 of the counter roller 8.
  • This ensures a greater contact pressure on the press roll 3, so that the roll jacket 9 of the counter-roll 8 mounted on the roll ends downwards in the central region, i.e. bends towards the third roller 14.
  • This also has a beneficial effect on the formation of a uniform second press nip 15.
  • the greater contact pressure of the press roll 3 with respect to the counter roll 8 can also be achieved via the size ratio of the support surfaces 7 of the opposing support elements 6, 11 of both rolls.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Friction Gearing (AREA)
EP96108438A 1995-06-03 1996-05-28 Presse à rouleaux Expired - Lifetime EP0745725B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19520443 1995-06-03
DE19520443A DE19520443C2 (de) 1995-06-03 1995-06-03 Walzenpresse

Publications (3)

Publication Number Publication Date
EP0745725A2 true EP0745725A2 (fr) 1996-12-04
EP0745725A3 EP0745725A3 (fr) 1997-01-22
EP0745725B1 EP0745725B1 (fr) 2000-07-26

Family

ID=7763626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108438A Expired - Lifetime EP0745725B1 (fr) 1995-06-03 1996-05-28 Presse à rouleaux

Country Status (6)

Country Link
US (2) US5908537A (fr)
EP (1) EP0745725B1 (fr)
JP (1) JPH0924492A (fr)
AT (1) ATE195009T1 (fr)
CA (1) CA2178020A1 (fr)
DE (2) DE19520443C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928843A3 (fr) * 1998-01-12 2000-11-22 Voith Sulzer Papiertechnik Patent GmbH Dispositif de pressage
EP1275773A1 (fr) * 2001-07-11 2003-01-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Presse à ligne de contact élargie pour la déshydratation d'une bande fibreuse

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348799C (zh) * 2002-08-30 2007-11-14 埃杜阿德库斯特斯机器厂两合公司 用于使纤维织物脱水的长辊隙辊压机
SE0300127D0 (sv) * 2003-01-17 2003-01-17 Imego Ab Indicator arrangement
US7185537B2 (en) * 2003-06-04 2007-03-06 Metso Paper, Inc. Nip and loading analysis system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2155477A1 (de) * 1971-11-09 1973-05-10 Johann Heinrich Saueressig Mas Walze an einem kalander, einer druckoder ausruestungsmaschine fuer ein kontinuierlich durchlaufendes, breitbandiges behandlungsgut
DE2909277C2 (de) * 1979-03-09 1983-07-21 geb. Pisch Hermengild 4815 Schloß Holte Mitter Walze für die Druckbehandlung von Warenbahnen
US4287021A (en) * 1979-08-27 1981-09-01 Beloit Corporation Extended nip press
FI833133L (fi) * 1982-09-30 1984-03-31 Beloit Corp Press med foerlaengt nyp
DE3343313A1 (de) * 1983-11-30 1985-06-05 J.M. Voith Gmbh, 7920 Heidenheim Walze zur behandlung von bahnen, vorzugsweise papierbahnen
DE3408119A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
DE8817076U1 (de) * 1988-12-08 1992-11-05 Eduard Küsters Maschinenfabrik GmbH & Co KG, 4150 Krefeld Kalander
DE4140879A1 (de) * 1991-12-11 1993-06-17 Voith Gmbh J M Pressenpartie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928843A3 (fr) * 1998-01-12 2000-11-22 Voith Sulzer Papiertechnik Patent GmbH Dispositif de pressage
US6942761B1 (en) 1998-01-12 2005-09-13 Voith Sulzer Papiertechnik Patent Gmbh Press device and method of using the same
EP1275773A1 (fr) * 2001-07-11 2003-01-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Presse à ligne de contact élargie pour la déshydratation d'une bande fibreuse

Also Published As

Publication number Publication date
US5908537A (en) 1999-06-01
DE19520443C2 (de) 2000-05-31
ATE195009T1 (de) 2000-08-15
EP0745725A3 (fr) 1997-01-22
DE19520443A1 (de) 1996-12-05
DE59605635D1 (de) 2000-08-31
EP0745725B1 (fr) 2000-07-26
US5788817A (en) 1998-08-04
CA2178020A1 (fr) 1996-12-04
JPH0924492A (ja) 1997-01-28

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