WO1999016971A1 - Presse a sabot - Google Patents

Presse a sabot Download PDF

Info

Publication number
WO1999016971A1
WO1999016971A1 PCT/SE1998/001762 SE9801762W WO9916971A1 WO 1999016971 A1 WO1999016971 A1 WO 1999016971A1 SE 9801762 W SE9801762 W SE 9801762W WO 9916971 A1 WO9916971 A1 WO 9916971A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
shoe
loading cylinder
shoe press
loading
Prior art date
Application number
PCT/SE1998/001762
Other languages
English (en)
Inventor
Lars Gustavsson
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
Priority claimed from SE9703571A external-priority patent/SE510551C2/sv
Application filed by Valmet-Karlstad Ab filed Critical Valmet-Karlstad Ab
Priority to DE69812984T priority Critical patent/DE69812984T2/de
Priority to EP98946773A priority patent/EP1021617B1/fr
Priority to AT98946773T priority patent/ATE236293T1/de
Publication of WO1999016971A1 publication Critical patent/WO1999016971A1/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 present invention relates to a shoe press for a paper or board machine, comprising a press shoe and a counter roll, which between themselves form an extended nip for a paper or cardboard web and a circulated flex- ible belt, at least one loading cylinder arranged between a horizontal beam included in the frame system of the shoe press and the press shoe and adapted to press the press shoe against the counter roll, the press shoe being arranged on top of the loading cylinder, and a device for securing the loading cylinder on the horizontal beam, said securing being releasable.
  • a shoe press with a device for moving a press shoe relative to the shoe press centre line, containing the centre line of the counter roll, is known from Fig. 6 in DE-A1-331 74 57, in which the device comprises a hydraulic-fluid-actuatable tube and a spring.
  • the device comprises a hydraulic-fluid-actuatable tube and a spring.
  • Various other devices for moving the centre of gravity of the supporting force acting on the press shoe relative to the press shoe are disclosed in US-A-4, 713, 147, in which a press shoe support between the press shoe and the frame system of the shoe press is movable in the cross-direction relative to the press shoe.
  • the press shoe support is a hydraulic-fluid-actuatable loading cylinder for pressing the press shoe against the counter roll.
  • the invention is based on said variant according to US-A-4, 713, 147, and its object is to simplify and make the device for moving the centre line of the loading cylinder relative to the centre line of the press less expensive.
  • Fig. 1 is a cross-sectional view of a non-limiting embodiment of the invention, seen in the machine direction
  • Fig. 2 is a cross-sectional view of a variant in the machine direction
  • Fig. 3 is a cross-sectional view of the variant along line III-III in Fig. 2, in the cross- direction
  • Fig. 4 is a top plan view of an eccentric plate, section IV-IV in Fig. 2.
  • the press shoe is made in one piece, while there are preferably a plurality of loading cylinders, distributed in the longitudinal direction of the press shoe in a row or in several rows which are spaced apart in the cross-direction of the press shoe.
  • Fig. 1 illustrates a shoe press for the press section of a paper or board machine, said machine comprising the conventional shoe press components press shoe 1, counter roll 2 having the direction of rotation R, which between themselves form an extended nip N, in which a paper or cardboard web W that is to be dewatered runs together with a circulated flexible press belt 3 and one or two press felts F, of which one is shown.
  • the press shoe 1 is in this case loosely arranged on the loading cylinder part 7, which may have, in a manner known per se, a hydrostatic compartment in its surface facing the press shoe 1 for floatingly suspending the press shoe.
  • a horizontal duct 9 which is formed in the longitudinal direction of the shoe (cross-direction) and intended for supplying the working chambers 10 of the loading cylinders with hydraulic fluid, e.g. oil, via a vertical duct 11 in the piston 8, the duct 9 being common to the working chambers of all the loading cylinders, while there is a vertical duct 11 for each working chamber, connecting the common duct 9 with the working chamber.
  • An O-ring 12 seals between the piston 8 and the cylinder part 7. Reference is once more made to Fig. 1.
  • the common duct 9 is formed in a separate horizontal bar 14, and the vertical ducts 11 consist of two duct parts 11' and 11", the duct part 11' being bored through the wall of the bar to the duct 9 in the bar, and the duct part 11" being bored in the piston 8. In this fashion, vertical ducts
  • the bar 14 can be bored in advance in the bar 14 and sealed for use later on, if, for instance, further loading cylinders 6 are to be mounted, or they can be bored only on such occasions.
  • the bar 14 thus forms part of all pistons 8, screws 15 providing for connection of the piston parts.
  • the bar 14 is made of aluminium (alloy) which can be extruded for obtaining the desired sectional shape of the bar 14 and the desired diameter of the common duct 9.
  • a space for an O-seal 11"' is arranged at the end of these ducts 11'.
  • the duct 9 is supplied with hydraulic fluid from a source (not shown) at one of its ends.
  • FIG. 2 and 3 A further possibility of commonly supplying a plurality of loading cylinders 6 is shown in Figs 2 and 3, in which a shoe press having at least two loading cylinders 6 is indicated, two being shown.
  • the common duct 9 is formed of bores 9' in the pistons 8 and of duct components 9" which extend between the loading cylinders 6 and mutually connect the bores 9 ' .
  • the duct component 9 '" is a T piece, the leg of which, as indicated by dash-dotted lines, serves to connect the duct 9 to a hydraulic fluid source.
  • the ends of the duct components 9" are simply inserted into the bores 9', which have widened ends 9a with an abutment 9b and an O-ring 9c for sealing purposes.
  • This embodiment allows in an advantageous manner connection of the hydraulic fluid source in the duct 9 between two optional neighbouring loading cylinders 6 and also allows in an advantageous manner the absorption of forces caused by heat deformation. Otherwise the same reference numerals are used as in Fig. 1 for the same press shoe components.
  • the securing of the pistons 8 on the beam 4 is, according to the invention, effected in such a manner that the loading cylinders 6 can, if desired, be moved relative to the press shoe 1 in the machine direction, thereby moving the centre lines Cl of the loading cylin- ders 6 relative to the centre line C2 of the shoe press. This can be desired for the reasons described above.
  • the securing device consists in the illustrated embodiments of a suitable number of screws 16 and screw plates 18 on opposite sides, in the machine direction, of each piston 8, and of a groove 19 formed in the piston 8 on each said piston side.
  • the holes 18' of the plates 18 let the screws 16 through, which are screwed in the beam 4, and the plates 18 engage in the grooves 19 in the sides of the pistons 8, such that when tightening the screws by the screw heads 16', the latter clamp the plates 18 between themselves and the beam 4, whereby the piston 8 is fixedly secured on the beam 4.
  • the plates 18 are identically polygonal and, as shown, eccentric.
  • the centre line Cl of the loading cylinders 6 can thus be moved relative to the centre line C2 of the shoe press, if desired, by loosening the screws 16 by their heads 16' and rotating the plates about the screws 16 for permitting the desired displacement of the loading cylinder 6 in the desired direction of movement (machine direction) .
  • the loading cylinder 6 in Fig. 1 is to be moved, for instance, in the running direction of the paper web, the right plate 18 is rotated about its screw 16 in such a manner that a lateral edge thereof which is positioned further away from the screw axis engages in the right groove 19, and the left plate 18 is rotated about its screw 16 such that the lateral edge thereof which is positioned correspondingly closer to the screw axis engages in the left groove 19.
  • the eccentric plates 18 can be identical with each other, or they can be of two kinds which are mirror images of each other.
  • Fig. 1 illustrates the plates and the bar 14 partly put into a recess in the beam 4, which, of course, is not necessary, as is evident from Figs 2 and 3.
  • the plates 18 engage in the grooves 19 in the common bar 14.
  • the circumferential part of the plates, which is not intended to engage in the grooves 19, can be circular.
  • a single eccentrically flanged sectional rod or bar can be arranged on the respective sides of the loading cylinders to engage in the grooves 19 in the pistons 8 by means of one flange and be screwed in the beam 4 by means of another flange, in which case the desired movement of the loading cylinders can be effected by rotation, after loosening the screws, of the rods about their longitudinal axis.
  • Fig. 2 can be considered to represent one more embodiment, in which the components 18, 18' are not plates, but two eccentrically flanged sectional rods/bars which are shown in cross-section and, thus, are common to all the loading cylinders .
  • the movement of the loading cylinders is effected, after loosening the screws 16, by letting the bars 18 and 18' change places, whereupon the screws 16 are tightened once more.
  • Such an arrangement thus allows movement of the loading cylinders between two positions in the machine direction.
  • the fixed connection can be effected by means of securing devices of the types shown.
  • the arrangement for supplying one or more hydrostatic compartments 21 arranged in the side of the press shoe 1 facing the counter roll 2 with hydraulic fluid for lubricating the press belt 3 serves the same purpose.
  • the compartments 21 are supplied with hydraulic fluid through a pipe 22, the hydraulic fluid conducting bore 22' of which (the hydraulic fluid source is not shown) is connected to each compartment by means of a duct 23 formed in the press shoe and a through hole 22" which is formed in the wall of the pipe 22 and which can be designed as a throttle.
  • the pipe 22 is attached to one side of the press shoe, in this case the upstream side, by means of pipe flanges 24 and screws 25.
  • the pipe 22 can be common to all compartments 21 (Fig. 1) or can be separate for each compartment 21 (Fig. 2) , in which case the separate pipes 22 communicate with each other via pipe components 22a like the duct components 9", thereby making it possible to absorb heat-conditioned deformation forces applied to the pipe 22.
  • the pipe 22 or pipes 22 and the joint pipes 22a can supply hydrostatic compartments 26 between the press shoe and the opposite side of the load- ing cylinders 6 via ducts 27 (indicated by dashed lines) formed in the press shoe and bores formed in the pipe/ pipes, or another pipe or a plurality of other pipes with joint pipes can be arranged on the opposite longitudinal side edge of the press shoe for this purpose.
  • the inventive shoe press is applicable also to calendering operations in a paper or board machine.

Landscapes

  • Paper (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

Presse à sabot pour machine à papier ou à carton, qui comporte un sabot (1) et un contre-rouleau (2) formant entre eux une ligne de contact allongée (N) pour une bande de papier ou de carton et pour une courroie souple (3) circulante, et au moins un cylindre (6) de charge disposé entre un montant horizontal (4) inclus dans le système de châssis (4, 5) de la presse et le sabot (1). Ledit cylindre est adapté pour presser le sabot (1) contre le contre-rouleau (2). Le sabot est disposé au-dessus du cylindre de charge et un dispositif permet de fixer le cylindre de charge (6) sur le montant horizontal (4), ledit dispositif de fixation étant libérable. Avec l'aide d'éléments excentriques (16, 18, 19) disposés des deux côtés, vu dans le sens machine, du cylindre de charge (6) au moins, ce dernier peut être actionné, après libération du dispositif de fixation, de manière à se déplacer dans le sens machine pour réguler le profil de pression de la presse à sabot.
PCT/SE1998/001762 1997-09-30 1998-09-30 Presse a sabot WO1999016971A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69812984T DE69812984T2 (de) 1997-09-30 1998-09-30 Schuhpresse
EP98946773A EP1021617B1 (fr) 1997-09-30 1998-09-30 Presse a sabot
AT98946773T ATE236293T1 (de) 1997-09-30 1998-09-30 Schuhpresse

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9703571-1 1997-09-30
SE9703571A SE510551C2 (sv) 1997-09-30 1997-09-30 Skopress för pappers- eller kartongmaskiner
SE9704235-2 1997-11-19
SE9704235A SE510609C2 (sv) 1997-09-30 1997-11-19 Skopress för en pappers- eller kartongmaskin

Publications (1)

Publication Number Publication Date
WO1999016971A1 true WO1999016971A1 (fr) 1999-04-08

Family

ID=26663093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001762 WO1999016971A1 (fr) 1997-09-30 1998-09-30 Presse a sabot

Country Status (5)

Country Link
EP (1) EP1021617B1 (fr)
AT (2) AT3120U1 (fr)
DE (2) DE29817097U1 (fr)
SE (1) SE510609C2 (fr)
WO (1) WO1999016971A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI107063B (fi) * 2000-06-19 2001-05-31 Metso Paper Inc Paperi- tai kartonkikoneen pitkänippipuristin

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713147A (en) * 1982-05-05 1987-12-15 Oy Tampella Ab Extended nip press with displaceable center of gravity for the supporting force
EP0345501A1 (fr) * 1988-05-25 1989-12-13 Valmet Paper Machinery Inc. Presse à pinçage prolongé
DE19515832C1 (de) * 1995-04-29 1996-05-02 Voith Sulzer Papiermasch Gmbh Schuhpreßwalze für eine Papiermaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713147A (en) * 1982-05-05 1987-12-15 Oy Tampella Ab Extended nip press with displaceable center of gravity for the supporting force
US4713147B1 (en) * 1982-05-05 1996-12-31 Valmet Paper Machinery Inc Extended nip press with displaceable centre of gravity for the supporting force
US4713147B2 (en) * 1982-05-05 1997-11-04 Valmet Paper Machinery Inc Extended nip press with displaceable center of gravity for the supporting force
EP0345501A1 (fr) * 1988-05-25 1989-12-13 Valmet Paper Machinery Inc. Presse à pinçage prolongé
DE19515832C1 (de) * 1995-04-29 1996-05-02 Voith Sulzer Papiermasch Gmbh Schuhpreßwalze für eine Papiermaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005080675A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Procede et appareil utilises conjointement a une presse a sabot
WO2005080674A1 (fr) * 2004-02-19 2005-09-01 Vaahto Oy Dispositif de charge pour une presse de chaussure
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

Also Published As

Publication number Publication date
SE510609C2 (sv) 1999-06-07
DE69812984D1 (de) 2003-05-08
DE69812984T2 (de) 2003-12-04
DE29817097U1 (de) 1998-11-26
EP1021617A1 (fr) 2000-07-26
SE9704235L (sv) 1999-03-31
AT3120U1 (de) 1999-10-25
ATE236293T1 (de) 2003-04-15
SE9704235D0 (sv) 1997-11-19
EP1021617B1 (fr) 2003-04-02

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