EP0107607A2 - Nasspresse mit verlängerter Presszone - Google Patents

Nasspresse mit verlängerter Presszone Download PDF

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Publication number
EP0107607A2
EP0107607A2 EP83630143A EP83630143A EP0107607A2 EP 0107607 A2 EP0107607 A2 EP 0107607A2 EP 83630143 A EP83630143 A EP 83630143A EP 83630143 A EP83630143 A EP 83630143A EP 0107607 A2 EP0107607 A2 EP 0107607A2
Authority
EP
European Patent Office
Prior art keywords
nip
shoe
roll shell
support
shell
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Withdrawn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
EP83630143A
Other languages
English (en)
French (fr)
Other versions
EP0107607A3 (de
Inventor
Edgar J. Justus
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.)
Beloit Corp
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of EP0107607A2 publication Critical patent/EP0107607A2/de
Publication of EP0107607A3 publication Critical patent/EP0107607A3/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to improvements in press mechanisms for dewatering fibrous webs, and more particularly to an extended nip press with an improved unique construction for arrangement and support of the elements that allows for a straight nip and improved support for the mechanisms which apply forces to the nip for dewatering the traveling web.
  • a further object of the invention is to provide an improved extended nip press assembly which is capable of continued operation without requiring attention for repair or shutdown, and which is simplified in construction to reduce the cost of parts and insure continued operation at a minimal cost to the paper mill.
  • An overall objective is to provide an improved extended nip press which embodies advantages and features which constitute improvements over presses heretofore available.
  • the drawings illustrate an extended nip press with a continual traveling fibrous web W passing through an extended nip N.
  • the nip is formed between a rotatable roll shell 10 and a shoe 11 which has a concave surface 12 facing the nip and a relieved leading edge 13.
  • a lubricant is provided at the lead end of the shoe 11 at the leading edge 13 by a lubricant supply nozzle 14.
  • An endless belt B is trained through the nip and the web W passes through the nip with means for receiving the water expressed from the web, such as a pair of felts Fl and F2.
  • the web is pressed throughout its travel between the concave surface 12 of the shoe and the rotating roll shell 10.
  • the shoe functions as a slipper bearing with a hydraulic wedge building up along the inner surface of the shoe between the belt and the shoe.
  • the shoe is pivotally supported about an axis parallel to the nip by being supported on a roll pin 15.
  • the roll pin is carried on the top of a piston 16 mounted in a cylinder 17 and a pressurized fluid such as hydraulic liquid is supplied to the chamber 18 beneath the piston.
  • the assembly of the shoe 11, roll pin 15 and piston 16 are sufficiently flexible to allow a limited bending without changing the nip pressure along the nip, but in accordance with the present invention, the roll shell and shoe are supported so as to maintain a straight nip and thereby avoid any possibility of inducing unequal forces along the nip due to bending of the roll shell 10 or the shoe 11.
  • the cylinder is supported on a beam 19 which is supported on its ends from an upper frame 24.
  • pivotal links 20 and 21 depend downwardly and are connected to the frame such as by pivot pins 21a and connected to the beam such as by pivot pins 21b, Figure 1.
  • These links 20 and 21 at the front end of the machine and similar links 23 at the rear end of the machine provide a support for the beam, but also interconnect the beam with a stationary shaft 26 passing through the center of the roll shell.
  • the stationary shaft 26 provides support for the roll shell and equal and opposite forces are applied at the location of the nip so as to maintain a straight nip.
  • a sliding shoe 29 is positioned within the inner smooth surface of the roll shell, and the shoe 29 is positioned equal and opposite the shoe 11 and preferably has a sliding surface area 29a which slides against the inner surface lOa of the roll shell, which is of the same area as the supporting surface 12 of the shoe 11.
  • the shoe 29 has a relieved leading edge 30 and lubricant within the roll shell maintains a hydraulic dynamic film between the shoe 29 and the inner surface lOa of the roll shell.
  • the shoe 29 is pivotally supported about an axis parallel to the nip on a roll pin 31 which is carried on a piston 32 mounted in a cylinder 33 in the shaft 26.
  • Pressurized fluid in a chamber 34 beneath the piston supports the piston, and the combined roll shell 10, shoe 29, and piston 32 have sufficient flexibility to allow for a slight bending without inducing unequal forces in the nip, but with the arrangement illustrated and described, the.nip can remain straight so that no bending is necessary.
  • the piston 32 for the shoe 29 is the same size as the piston 16 for the shoe 11, so that when the chambers beneath the pistons are pressurized to the same pressure, the forces in the nip will be equal and opposite.
  • a common source of fluid pressure 37 is connected through lines 35 and 36 to the chambers 34 and 18.
  • the shoe 29 in the roll shell either larger or smaller than the shoe 11 opposite the nip.
  • the shoe 29 applies a force equal and opposite to the force applied by the shoe 11. If a smaller support piston 32 is used for the shoe within the roll, then increased hydraulic pressure in the chamber 34 will accomplish the same equal and opposite force.
  • a drive is provided which is positioned laterally of the nip. That is, the drive is preferably approximately 90° from the nip, and as illustrated, a dual drive is arranged with a ring gear 38 being attached to the roll shell.
  • the rinq qear is driven by pinions 39 and 40 driven bv shafts 41 and 42, Figures 1 and 3.
  • the drive shafts and pinions are supported in suitable bearings in the plate assembly 25 which is supported from the frame 24 and from downwardly extending brackets 22 and 23 on which the links such as 20, 21 and 23 are suspended.

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  • Paper (AREA)
EP83630143A 1982-09-30 1983-09-09 Nasspresse mit verlängerter Presszone Withdrawn EP0107607A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42856482A 1982-09-30 1982-09-30
US428564 1982-09-30

Publications (2)

Publication Number Publication Date
EP0107607A2 true EP0107607A2 (de) 1984-05-02
EP0107607A3 EP0107607A3 (de) 1984-11-14

Family

ID=23699446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630143A Withdrawn EP0107607A3 (de) 1982-09-30 1983-09-09 Nasspresse mit verlängerter Presszone

Country Status (8)

Country Link
EP (1) EP0107607A3 (de)
JP (1) JPS5966594A (de)
KR (1) KR840005848A (de)
AR (1) AR230075A1 (de)
BR (1) BR8305474A (de)
DE (1) DE107607T1 (de)
ES (1) ES525987A0 (de)
FI (1) FI833133L (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408118A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
US4931142A (en) * 1987-03-13 1990-06-05 J. M. Voith Gmbh Long-nip roll press with eccentric travel path of press shell
US4975153A (en) * 1989-08-23 1990-12-04 Beloit Corporation Press section apparatus with deflection compensated granite roll shell
WO1991005913A1 (de) * 1989-10-11 1991-05-02 Sulzer-Escher Wyss Gmbh Walzenpresse
US5140897A (en) * 1989-08-09 1992-08-25 Beloit Corporation Extended nip press apparatus
EP0666367A1 (de) * 1994-02-04 1995-08-09 Valmet Paper Machinery Inc. Kupplungskonstruktion zwischen Rollen einer Breit-Nip-Presse sowie Verfahren zum Kuppeln dieser Rollen
US5908537A (en) * 1995-06-03 1999-06-01 Voith Sulzer Papiermaschinen Gmbh Three roll press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738752A (en) * 1986-08-12 1988-04-19 Beloit Corporation Heated extended nip press apparatus
CA1340148C (en) * 1986-08-12 1998-12-01 Leroy H. Busker Method of reducing shrinkage during drying of a paper web

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757190A (fr) * 1969-10-21 1971-03-16 Karlstad Mekaniska Ab Mecanisme de commande pour cylindre
US3853698A (en) * 1972-04-17 1974-12-10 Beloit Corp Large roll hydraulic press with pressurized fluid supports
US3889334A (en) * 1972-08-01 1975-06-17 Beloit Corp Controlled deflection roll drive
US4287021A (en) * 1979-08-27 1981-09-01 Beloit Corporation Extended nip press
US4272317A (en) * 1979-11-01 1981-06-09 Beloit Corporation Roll bearing alignment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408118A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
US4661206A (en) * 1984-02-06 1987-04-28 Sulzer-Escher Wyss Gmbh Wet press for dewatering a material web with plural pressure pockets and unsymmetrical arrangement
US4931142A (en) * 1987-03-13 1990-06-05 J. M. Voith Gmbh Long-nip roll press with eccentric travel path of press shell
US5140897A (en) * 1989-08-09 1992-08-25 Beloit Corporation Extended nip press apparatus
US4975153A (en) * 1989-08-23 1990-12-04 Beloit Corporation Press section apparatus with deflection compensated granite roll shell
WO1991005913A1 (de) * 1989-10-11 1991-05-02 Sulzer-Escher Wyss Gmbh Walzenpresse
EP0666367A1 (de) * 1994-02-04 1995-08-09 Valmet Paper Machinery Inc. Kupplungskonstruktion zwischen Rollen einer Breit-Nip-Presse sowie Verfahren zum Kuppeln dieser Rollen
US5507223A (en) * 1994-02-04 1996-04-16 Valmet Paper Machinery, Inc. Arrangement for coupling extended-nip rolls
US5908537A (en) * 1995-06-03 1999-06-01 Voith Sulzer Papiermaschinen Gmbh Three roll press

Also Published As

Publication number Publication date
JPS5966594A (ja) 1984-04-16
BR8305474A (pt) 1984-05-15
DE107607T1 (de) 1986-02-13
FI833133A7 (fi) 1984-02-28
FI833133A0 (fi) 1983-09-02
ES8502503A1 (es) 1985-01-01
ES525987A0 (es) 1985-01-01
AR230075A1 (es) 1984-02-29
EP0107607A3 (de) 1984-11-14
KR840005848A (ko) 1984-11-19
FI833133L (fi) 1984-03-31

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19850207

ITCL It: translation for ep claims filed

Representative=s name: RICCARDI SERGIO & CO.

EL Fr: translation of claims filed
DET De: translation of patent claims
17Q First examination report despatched

Effective date: 19860205

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860616

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JUSTUS, EDGAR J.