EP1098033A2 - Rouleau de pressage à pincage prolongé - Google Patents

Rouleau de pressage à pincage prolongé Download PDF

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Publication number
EP1098033A2
EP1098033A2 EP00120830A EP00120830A EP1098033A2 EP 1098033 A2 EP1098033 A2 EP 1098033A2 EP 00120830 A EP00120830 A EP 00120830A EP 00120830 A EP00120830 A EP 00120830A EP 1098033 A2 EP1098033 A2 EP 1098033A2
Authority
EP
European Patent Office
Prior art keywords
zone
shoe press
press roll
water
roller
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.)
Withdrawn
Application number
EP00120830A
Other languages
German (de)
English (en)
Other versions
EP1098033A3 (fr
Inventor
Andreas Meschenmoser
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 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
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1098033A2 publication Critical patent/EP1098033A2/fr
Publication of EP1098033A3 publication Critical patent/EP1098033A3/fr
Withdrawn legal-status Critical Current

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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 shoe press roll for dewatering a fibrous web, in particular a paper, cardboard or tissue web in manufacturing machines and / or finishing the same consisting of a flexible roll shell profiled surface for water absorption, to form a press nip of at least one pressing element with a concave pressing surface against one cylindrical counter roll is pressed, at least between the Shoe press roller and the fibrous web an endless dewatering belt Absorption of the squeezed water that runs after the press nip from Roll jacket of the shoe press roll is carried away and if possible after Press nip between the shoe press roller and this drainage belt Water collecting device for receiving and discharging the from the roller jacket the shoe press roll thrown water is arranged.
  • the object of the invention is therefore to rewet the Drainage belt through the centrifuged water of the roll shell counteract.
  • the concave curved press nip connects a transition area with a convex begins with a relatively large radius of curvature and with a ends convexly curved end zone with a relatively small radius of curvature.
  • direction and the amount of water thrown off the roller jacket depends essentially on centrifugal forces.
  • the centrifugal force is in turn proportional to the square of the Velocity and inversely proportional to the radius of curvature.
  • the roll shell is guided after the press nip via a Guide element, wherein the pressing element and the guide element are lubricated should.
  • a Guide element to connect the pressing element, preferably to be made in one piece.
  • the radius of curvature of the should existing curved intermediate zone may be significantly larger than that of the end zone. (In the case of an infinitely large radius of curvature, the so-called plane would result Intermediate zone).
  • the radius of curvature is convex curved intermediate zone larger to extend the transition zone, in particular, be significantly larger than that of the initial zone.
  • the surface should be able to absorb as much water as possible and hold it well have grooves and / or blind bores in the roll shell. These grooves or Blind bores relax at the end of the press nip and thus ensure one additional suction. This suction effect keeps the water on the roller jacket in the Area of curvature of the initial zone, which is why it is also relatively short, preferably should be significantly shorter than the intermediate zone or its sum.
  • the drainage belts are generally designed as a sieve or felt are used to pick up and remove the pressed material in the press nip Water.
  • the invention brings particular advantages in the case of shoe press rolls which are above Fibrous web are arranged, since the weight of the spin supports the water to the fibrous web.
  • the fibrous web 1 is used together with one endless drain belt 7.14 on both sides through the press nip 3.
  • the drainage belts 7.14 designed as felt take the squeezed out Water and transport it from the press nip 3.
  • the press nip 3 is arranged above the fibrous web 1 Shoe press roll and a counter roll 6 formed, the shoe press roll from a flexible roll shell 2 with a grooved and blind drilled surface There is water absorption by a pressure element 4 with concave Press surface 5 is pressed against the counter roller 6. The contact pressure of the Pressing element 4 is generated hydraulically.
  • a water collecting device 8 which is arranged as close as possible to the press nip 3.
  • This water catcher 8 in Form of a water channel serves to receive the from the roll shell 2 Shoe press roll of water thrown out, the result still by the Generation of a negative pressure in the water channel can be improved.
  • the concave curved press nip 3 Transition area 9 connects, which has a convexly curved starting zone 10 starts with a relatively large radius of curvature and with a convex curvature End zone 11 ends with a relatively small radius of curvature. His reasoning finds this is because the centrifugal force is inversely proportional to the radius of curvature behaves, which means that the stronger centrifugation only takes place in the end zone.
  • the roll shell 2 is guided over a guide element 12 performed, which is connected to the pressing element 4 here.
  • the contact surface 5 and the contact surface of the guide element 12 are used to reduce the Lubricated with the roll shell 2.
  • the transition area 9 also has here between the beginning 10 and the end zone 11 a convexly curved intermediate zone 13.
  • the radius of curvature is Intermediate zone 13 larger than that of the initial zone 10 and much larger than that the end zone 11 and preferably corresponds approximately to the diameter of the Roll shell 2.
  • the intermediate zone 13 moves the end zone 11 from the press nip 3 away, due to the large radius of curvature little or no water is thrown out.

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  • Paper (AREA)
EP00120830A 1999-11-05 2000-09-25 Rouleau de pressage à pincage prolongé Withdrawn EP1098033A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19953474A DE19953474A1 (de) 1999-11-05 1999-11-05 Schuhpresswalze
DE19953474 1999-11-05

Publications (2)

Publication Number Publication Date
EP1098033A2 true EP1098033A2 (fr) 2001-05-09
EP1098033A3 EP1098033A3 (fr) 2001-11-07

Family

ID=7928152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00120830A Withdrawn EP1098033A3 (fr) 1999-11-05 2000-09-25 Rouleau de pressage à pincage prolongé

Country Status (3)

Country Link
US (1) US6383338B1 (fr)
EP (1) EP1098033A3 (fr)
DE (1) DE19953474A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process
SE538098C2 (sv) 2013-11-14 2016-03-01 Valmet Aktiebolag En långnypsvals med ett stödelement för behandling av en fiberbana

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576682A (en) * 1983-03-23 1986-03-18 Valmet Oy Long-nip press for a paper making machine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71979B (fi) * 1981-06-24 1986-11-28 Escher Wyss Ag Pressvals
DE3808293C2 (de) * 1988-03-12 1994-08-18 Voith Gmbh J M Langspalt-Preßwalze
DE8805966U1 (de) * 1988-05-05 1989-09-07 J.M. Voith Gmbh, 7920 Heidenheim Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papierbahn
DE3815278A1 (de) * 1988-05-05 1989-11-16 Voith Gmbh J M Pressenpartie einer maschine zur herstellung einer faserstoffbahn, insbesondere papierbahn
US5167768A (en) * 1991-11-07 1992-12-01 Beloit Corporation Wide nip web press and method using a press shoe with two pivots
DE4337583A1 (de) * 1993-11-04 1995-05-11 Voith Gmbh J M Preßvorrichtung zum Behandeln einer Warenbahn, insbesondere Papierbahn
FI942616L (fi) * 1994-06-03 1995-12-04 Valmet Corp Paperirainan esipuristin
US5543015A (en) * 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press
US5908536A (en) * 1995-10-03 1999-06-01 Valmet Corporation Method and machine for removing water from a paper or board web by pressing
DE19544978C2 (de) * 1995-12-01 1998-07-30 Voith Sulzer Papiermasch Gmbh Preßwalze
DE19642401A1 (de) * 1996-10-14 1998-04-16 Voith Sulzer Papiermasch Gmbh Pressenanordnung
DE19644110A1 (de) * 1996-10-31 1998-05-07 Voith Sulzer Papiermasch Gmbh Saugkasten
US6042694A (en) * 1997-09-30 2000-03-28 Valmet-Karlstad Ab Shoe press
FI111860B (fi) * 1998-03-04 2003-09-30 Metso Paper Inc Pitkänippipuristintela ja sitä soveltava paperikoneen puristinosa
DE19833423A1 (de) * 1998-07-24 2000-01-27 Voith Sulzer Papiertech Patent Walzenpresse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576682A (en) * 1983-03-23 1986-03-18 Valmet Oy Long-nip press for a paper making machine

Also Published As

Publication number Publication date
US6383338B1 (en) 2002-05-07
DE19953474A1 (de) 2001-05-10
EP1098033A3 (fr) 2001-11-07

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