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WO1999016967A1 - Presse a sabot et procede de montage du sabot presseur associe - Google Patents

Presse a sabot et procede de montage du sabot presseur associe Download PDF

Info

Publication number
WO1999016967A1
WO1999016967A1 PCT/SE1998/001758 SE9801758W WO9916967A1 WO 1999016967 A1 WO1999016967 A1 WO 1999016967A1 SE 9801758 W SE9801758 W SE 9801758W WO 9916967 A1 WO9916967 A1 WO 9916967A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
shoe
piston
hydraulic fluid
compartment
Prior art date
Application number
PCT/SE1998/001758
Other languages
English (en)
Swedish (sv)
Inventor
Joakim Palmgren
Mikael Nyman
Erik Brox
Original Assignee
Valmet-Karlstad Ab
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 Valmet-Karlstad Ab filed Critical Valmet-Karlstad Ab
Priority to EP98946769A priority Critical patent/EP1027488A1/fr
Publication of WO1999016967A1 publication Critical patent/WO1999016967A1/fr

Links

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 on the one hand to a method of supporting a press shoe in a shoe press and, on the other hand, to a shoe press.
  • the invention concerns a shoe press for a paper or board machine, said shoe press having a press shoe which together with a counter roll forms an extended nip for a paper or cardboard web and for a flexible circulated belt, and at least one piston-and-cylinder assembly, which is arranged between a supporting beam associated with the frame system of the shoe press and the press shoe and in which hydraulic fluid is supplied to a working chamber, said working chamber communicating with a compartment via a throttle, said compartment being arranged on the outside of the piston-and-cylinder assembly in such a manner that the hydraulic fluid therein exerts directly or indirectly a force upon the press shoe in the direction opposite to that of the force exerted upon the press shoe by the hydraulic fluid in said working chamber.
  • a shoe press as described above is disclosed in
  • This prior-art shoe press suffers from the drawback that lateral forces which in operation affect the press shoe are transmitted to the cylinder jacket and the piston, which may cause a jam between the press shoe ' and the piston.
  • the object of the invention is to eliminate this drawback.
  • the drawback implying that lateral forces which in operation affect a press shoe are transmitted to the cylinder jacket and the piston has been eliminated by a new method of supporting the press shoe, said method having the characteristic features as defined in claim 1.
  • Advantageous embodiments are stated in the subclaims.
  • Fig. 1 is a cross-sectional view of a first embodiment of the shoe press according to the invention
  • Fig. 2 is a cross-sectional view of a second embodiment of the shoe press according to the invention
  • Fig. 3 is a cross-sectional view of a third embodiment of the shoe press according to the invention.
  • FIGs 1 and 2 designates two embodiments of a shoe press and reference numerals 2, 3, 4 designate a press shoe, a piston and a cylinder, respectively.
  • the cylinder 4 and the piston 3 which is movingly arranged therein define a chamber 5, to which a hydraulic fluid, e.g. oil, is supplied from a duct 6 in the piston 3 via one or more bores 7 in the piston 3.
  • a radial seal 8 is arranged for the sealing of the chamber 5.
  • the piston 3 is slightly tiltable in the cylinder 4.
  • Reference numeral 9 designates a horizontal support- ing beam located in the shoe press and fixed to the frame.
  • the piston 3 is fixedly connected to the press shoe 2, and the end wall of the cylinder 4 rests freely on the beam 9, while in the embodiment according to Fig. 2, the piston 3 is fixedly connected to the beam 9 and the press shoe 2 rests freely on the end wall of the cylinder .
  • bolts 10 The flexible press belt of the shoe press is designated 11, and the counter roll of the shoe press is designated 12.
  • a through throttle 14 which opens into a shallow compart- rr.ent or pressure chamber 15 in the end wall of the cylinder 4. Hydraulic fluid in the chamber 5 may thus escape to this compartment via the throttle 14.
  • the area of the compartment 15 is somewhat larger than the inner area of the cylinder 4, which causes the lifting force exerted upon the press shoe 2 by the hydraulic fluid in the compartment 15 at an initial stage of the operation to be greater than the force exerted upon the press shoe 2 by the hydraulic fluid in the working chamber 5. This results in the forming of a gap 16 between the annular bottom surface 4' of the cylinder 4 and the beam 9
  • Fig. 3 illustrates a shoe press having a press shoe 300, a counter roll 312, a circulated press belt 311, a piston-and-cylinder assembly 310 with piston 330 and cylinder 340, and a beam 309 which is fixed to the frame.
  • the piston 330 is attached to the beam 309 by means of bolts 350.
  • the top face of the movable cylinder 340 adjoins the press shoe 300, and in this top face there is a compartment or hydraulic fluid chamber 301, which is defined by an annular flange with an annular surface 340' on the top of the cylinder 340.
  • the compartment 301 is supplied with hydraulic fluid via a sectional pipe 303 which is attached to the longitudinal side edge 304 of the press shoe 300 and which has an inner duct 306, via a bore 302 formed in the press shoe 300 and having bore portions 302' and 302" which are perpendicular to each other, and an opening 308 which is formed in the sectional pipe 303 and constitutes a throttle.
  • a sectional pipe 303 which is attached to the longitudinal side edge 304 of the press shoe 300 and which has an inner duct 306, via a bore 302 formed in the press shoe 300 and having bore portions 302' and 302" which are perpendicular to each other, and an opening 308 which is formed in the sectional pipe 303 and constitutes a throttle.
  • the working chamber 325 of the piston-and-cylinder assembly 310 is supplied with hydraulic fluid, like in the embodiments above, via a duct system 326, 327 in the piston 330.
  • the inventive shoe press is applicable also to calendering operations in a paper or board machine.

Landscapes

  • Paper (AREA)

Abstract

L'invention porte sur un procédé de montage du sabot presseur de la presse à sabot d'une machine à papier ou à carton ledit sabot presseur (2) étant séparé d'une contre-calandre (12) par une pince étendue (N) où défilent une bande (W) de papier ou de carton et une toile sans fin (12). Un compartiment (15) recevant du liquide hydraulique, disposé à l'extérieur du vérin de charge (3, 4) du sabot presseur, est alimenté de manière à ce que le fluide exerce directement ou indirectement sur le sabot presseur une force opposée à celle du vérin de charge. Le cylindre (4) du vérin est monté mobile sur son piston (3). Lesdites forces sont calculées de manière créer pendant la marche entre le sabot presseur et le vérin de charge, ou entre le sommier (9) portant le sabot presseur et le vérin de charge, un intervalle par où peut s'écouler le fluide hydraulique du compartiment (15). Dans l'une des exécutions de presse à sabot décrite ci-dessus, le cylindre (5) du vérin de charge (3, 4) peut communiquer avec le compartiment (15) via une soupape (14), et le cylindre et le compartiment peuvent être alimentés séparément.
PCT/SE1998/001758 1997-09-30 1998-09-30 Presse a sabot et procede de montage du sabot presseur associe WO1999016967A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98946769A EP1027488A1 (fr) 1997-09-30 1998-09-30 Presse a sabot et procede de montage du sabot presseur associe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9703570-3 1997-09-30
SE9703570A SE510552C2 (sv) 1997-09-30 1997-09-30 Skopress och sätt för lagring av en pressko i en skopress

Publications (1)

Publication Number Publication Date
WO1999016967A1 true WO1999016967A1 (fr) 1999-04-08

Family

ID=20408465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001758 WO1999016967A1 (fr) 1997-09-30 1998-09-30 Presse a sabot et procede de montage du sabot presseur associe

Country Status (3)

Country Link
EP (1) EP1027488A1 (fr)
SE (1) SE510552C2 (fr)
WO (1) WO1999016967A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036674A1 (de) * 2000-06-07 2001-12-13 Voith Paper Patent Gmbh Schuhpreßeinheit
WO2001098584A1 (fr) * 2000-06-19 2001-12-27 Metso Paper, Inc. Presse a pince etendue de machine a papier ou a carton
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot
US20150013926A1 (en) * 2012-02-16 2015-01-15 International Paper Company Methods and Apparatus for Forming Fluff Pulp Sheets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515832C1 (de) * 1995-04-29 1996-05-02 Voith Sulzer Papiermasch Gmbh Schuhpreßwalze für eine Papiermaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515832C1 (de) * 1995-04-29 1996-05-02 Voith Sulzer Papiermasch Gmbh Schuhpreßwalze für eine Papiermaschine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036674A1 (de) * 2000-06-07 2001-12-13 Voith Paper Patent Gmbh Schuhpreßeinheit
WO2001098584A1 (fr) * 2000-06-19 2001-12-27 Metso Paper, Inc. Presse a pince etendue de machine a papier ou a carton
AT412558B (de) * 2000-06-19 2005-04-25 Metso Paper Inc Langspaltpresse für eine papiermaschine oder kartonmaschine
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot
US7582192B2 (en) 2004-02-19 2009-09-01 Vaahto Oy Loading device for a shoe press
CN1961115B (zh) * 2004-02-19 2012-07-18 瓦图公司 改变靴式压榨部压榨辊隙中的加载压力分布的方法和装置
US20150013926A1 (en) * 2012-02-16 2015-01-15 International Paper Company Methods and Apparatus for Forming Fluff Pulp Sheets
US9347182B2 (en) * 2012-02-16 2016-05-24 International Paper Company Methods and apparatus for forming fluff pulp sheets

Also Published As

Publication number Publication date
SE9703570D0 (sv) 1997-09-30
SE510552C2 (sv) 1999-05-31
SE9703570L (sv) 1999-03-31
EP1027488A1 (fr) 2000-08-16

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