EP0752495A1 - Dispositif de pressage à zone prolongée - Google Patents

Dispositif de pressage à zone prolongée Download PDF

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Publication number
EP0752495A1
EP0752495A1 EP96106059A EP96106059A EP0752495A1 EP 0752495 A1 EP0752495 A1 EP 0752495A1 EP 96106059 A EP96106059 A EP 96106059A EP 96106059 A EP96106059 A EP 96106059A EP 0752495 A1 EP0752495 A1 EP 0752495A1
Authority
EP
European Patent Office
Prior art keywords
support elements
shoe
roller
press
elements
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
EP96106059A
Other languages
German (de)
English (en)
Other versions
EP0752495B1 (fr
Inventor
Joachim Grabscheid
Christian Schiel
Andreas Schuette
Ulrich Wieland
Wolfgang Schuwerk
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 EP0752495A1 publication Critical patent/EP0752495A1/fr
Application granted granted Critical
Publication of EP0752495B1 publication Critical patent/EP0752495B1/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
    • 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
    • D21F3/06—Means for regulating the pressure

Definitions

  • the invention relates to a shoe press device of the type according to DE43 19 323 A1.
  • the following features, which form the preamble of claim 1, are disclosed there:
  • the shoe press device is used for treating (e.g. dewatering) a running web (e.g. paper or cardboard web). It extends over the entire maximum web width.
  • a flexible circumferential press jacket can be pressed against a counterpressure element (e.g. counter roll) by means of a press shoe, which is supported on a stationary support body. Between the support body and the press shoe, a plurality of support elements generating the pressing force are arranged along their longitudinal extent; these can be acted upon individually or in groups with different pressure medium pressures.
  • the support elements are preferably designed as ring elements, the interior of which can be connected to a pressure medium source (as is also known from DE'323).
  • the primary aim is to achieve a delicately adjustable edge relief by switching the pressure of the pressure medium in individual support elements as simply as possible on or off. This is intended to reduce the expenditure on control technology that would be required if the pressure in individual support elements had to be infinitely adjustable.
  • two or three rows of relatively small support elements are provided in DE'323 along the longitudinal extent of the press shoe.
  • this has the disadvantage that an enormously high number of supporting elements is required, approximately 10-20 pieces per meter of web width. Even with rational production, the effort for this is considerable.
  • the invention is therefore based on the object of providing a pressing device which, compared to the known design, can be produced with less effort and yet offers the possibility of varying the pressing force distribution over the web width as desired.
  • All main support elements are preferably fed from one and the same main pressure source.
  • the edge support elements are connected to the main pressure source via at least one pressure reducing valve or via a simple OPEN-CLOSE valve.
  • at least one separate edge pressure source is provided, which supplies the edge support elements with pressure medium independently of the main support elements.
  • any pressure values can be set in the edge support elements, which can also be higher than the pressure in the main support elements.
  • edge support elements or a part thereof can be connected temporarily to the main pressure source or temporarily to an additional edge pressure source by means of a switching device.
  • edge support elements and their control need not necessarily be symmetrical, i.e. evenly on the two roller ends. Rather, asymmetrical arrangements and control devices are also conceivable. This applies, for example, when the web to be treated temporarily has a smaller web width compared to the maximum web width mentioned. It is advantageous if the narrower web runs flush with one of the two edges of the maximum web width through the pressing device, so that in particular the devices used for threading the web, which are usually located in the driver's edge zone, can continue to be used.
  • the counter roller is a deflection adjustment roller, the roller shell of which can also be supported on a stationary support body by means of a series of support elements. These support elements are preferably fed from the same pressure source as the support elements of the shoe press device.
  • the deflection adjustment roller can also have individually controllable edge support elements which are smaller than the (remaining) main support elements. In a preferred design, however, it only has relatively large main support elements that can be produced inexpensively.
  • the deflection adjustment roller has only relatively large main support elements
  • the shoe press device also called “shoe press roller”
  • the shoe press device has main support elements and in each edge zone two relatively small edge support elements arranged one behind the other in the web running direction. All support elements are designed as ring elements, the main support elements of the shoe pressing device and those of the Deflection adjustment roller have the same diameter.
  • the number of main support elements in the shoe press device can be one less than in the deflection adjustment roller, so that - in a view of the entire press device - there is a zigzag arrangement of the main support elements.
  • edge support elements are omitted in the deflection adjustment roller if the shoe press roller lies below the deflection adjustment roller, i.e. if the support elements on the roller shell in the latter act in the same direction as gravity.
  • Figure 1 is a longitudinal section through a complete press device comprising a shoe press device and a deflection adjusting roller.
  • Figure 2 is a cross section to this.
  • Figures 3 to 6 show schematically different combinations of main and edge support elements.
  • FIG. 7 shows a variant of FIG. 1.
  • a shoe press device (or “shoe press roll”) is generally designated 10; this forms, together with a deflection adjustment roller 20 arranged at the top, an extended press nip (in the web running direction).
  • a paper web to be dewatered runs through this (perpendicular to the plane of the drawing), the width of which has dimension B, for example. See paper web 9 and wet felt 8 in FIG. 2.
  • the shoe press device comprises a flexible circumferential press jacket 11 and a press shoe 12 which extends over the web width. This is supported with the aid of several support elements 13, 14 on a stationary support body 15 which rests in machine frames 16 at both ends.
  • the support elements are only shown schematically in the drawing. Specifically, they are preferably designed in accordance with patent application No. 195 14 143.3 dated April 15, 1995, to which express reference is hereby made (PA10157). 1, the counter roller 20 can also be arranged below the shoe press device 10.
  • the shoe press device 10 similar to that shown in FIG. 3, has a single row of main support elements 13, for example six in number.
  • the deflection adjustment roller 20 has a metallic roller jacket 21, which rests in bearing blocks 22 via bearing necks and roller bearings.
  • a stationary yoke 25 is also supported in the same bearing blocks.
  • a single row of support elements 23 is provided between the yoke 25 and the roller jacket 21, which are directly opposite the support elements 13, 14 of the shoe pressing device.
  • the number of support elements 23 in the deflection adjusting roller 20 is one higher than in the shoe press device 10; they are offset by half a pitch relative to those of the shoe press.
  • the support elements 13, 14 and 23 are supplied via pressure medium lines 19 and 29, which are preferably fed with pressure fluid from a common pressure medium source 30.
  • a pressure reducing valve 28 can be provided, for. B. if it is necessary to balance the weight of the roll shell 21.
  • FIG. 3 shows the line system for supplying pressure medium to the support elements 13 and 14 of the shoe press unit 10.
  • the pump 30 and the pressure medium lines 19 and 29 as well as the branch lines leading to the main support elements 13 and to the edge support elements 14 can be seen again.
  • the pressure in the latter can be reduced, if necessary, by means of pressure reducing valves 18 compared to the pressure prevailing in line 19.
  • edge area can be narrowed at each roll end by not only providing two, but three even smaller edge support elements 14a one behind the other in the web running direction.
  • FIGS. 5 and 6 the edge zones are different in width from those in FIGS. 1 and 3.
  • an additional row of two edge support elements 14b is provided on one of the two roller ends (accordingly the entire pressing device is made longer).
  • An additional pressure medium source 31 is provided for the edge support elements, which can (if necessary) supply a higher or a lower pressure than the pressure medium source 30.
  • Pressure control valves 32, 33, an OPEN-CLOSE valve 34 and a changeover valve 35 allow to control the pressures prevailing in the edge support elements as desired.
  • the system according to FIG. 6 has the same overall length as that of FIG. 3.
  • a difference from FIG. 3 is that one of the main support elements 13 is replaced by a group of four edge support elements 14c.
  • the latter are preferably dimensioned such that the sum of their support forces is approximately the same as the support force of a main support element 13.
  • Each row of edge support elements can be switched on or off from a relatively high to a relatively low pressure via an OPEN-CLOSE valve 36 (the atmospheric pressure can be) switchable. This is the simplest method to either apply the full pressure to the edge zones of the press shoe 12 or to relieve it (within the scope of the flexibility of the press shoe 12) with different web widths.
  • the number of support elements 23 of the counter-roller 20 is the same as the number of main support elements 13 of the shoe press roller 10.
  • the arrangement here is chosen such that the support elements 13 and 23 lie opposite one another in pairs.
  • the counter roller 20 could also have edge support elements compared to the edge support elements 14 of the shoe press roll 10. However, these are omitted in the example shown.
EP96106059A 1995-06-27 1996-04-18 Dispositif de pressage à zone prolongée Expired - Lifetime EP0752495B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19522761 1995-06-27
DE19522761A DE19522761C2 (de) 1995-06-27 1995-06-27 Schuh-Preßeinrichtung

Publications (2)

Publication Number Publication Date
EP0752495A1 true EP0752495A1 (fr) 1997-01-08
EP0752495B1 EP0752495B1 (fr) 1999-09-08

Family

ID=7765042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106059A Expired - Lifetime EP0752495B1 (fr) 1995-06-27 1996-04-18 Dispositif de pressage à zone prolongée

Country Status (6)

Country Link
US (1) US5753083A (fr)
EP (1) EP0752495B1 (fr)
JP (1) JP3795576B2 (fr)
AT (1) ATE184338T1 (fr)
CA (1) CA2179545C (fr)
DE (2) DE19522761C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6942761B1 (en) * 1998-01-12 2005-09-13 Voith Sulzer Papiertechnik Patent Gmbh Press device and method of using the same
US7722744B2 (en) * 2003-10-31 2010-05-25 Voith Paper Patent Gmbh Pressing device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645407A1 (de) * 1996-11-04 1998-05-07 Voith Sulzer Papiermasch Gmbh Schuhpresse
DE10138526A1 (de) * 2001-08-06 2003-02-20 Voith Paper Patent Gmbh Flexibler Pressmantel und Schuhpresswalze mit einem solchen flexiblen Pressmantel
DE20114857U1 (de) * 2001-09-07 2003-01-16 Kuesters Eduard Maschf Langspalt-Walzenpresse zum Entwässern einer Faserstoffbahn
DE10209582A1 (de) * 2002-03-05 2003-09-18 Voith Paper Patent Gmbh Maschine zur Herstellung einer Tissuebahn
DE102008035540A1 (de) * 2008-07-30 2010-02-04 Voith Patent Gmbh Presswalzenanordnung
CN101890822B (zh) * 2010-06-29 2012-07-04 湖州机床厂有限公司 一种纵梁液压机同步控制系统
ITMI20110353A1 (it) * 2011-03-07 2012-09-08 Gambini Int Sa Rullo per dispositivi di trattamento di materiale cartaceo nastriforme e relativo dispositivo
CN102517960B (zh) * 2012-01-10 2014-03-19 山东昌华造纸机械有限公司 靴式压榨装置
ITFI20130106A1 (it) * 2013-05-09 2014-11-10 Toscotec S P A Pressa a scarpa.
DE102019104388A1 (de) * 2019-02-21 2020-08-27 Voith Patent Gmbh Schuhpresse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564381A5 (en) * 1973-05-11 1975-07-31 Escher Wyss Ag Rolling mill with at least two rollers - ends of rolls contain grooves or reduced roll-barrel thickness to premit flexure
US4570314A (en) * 1981-06-24 1986-02-18 Escher Wyss Aktiengesellschaft Press roll
DE4319323A1 (de) * 1993-06-11 1993-11-04 Voith Gmbh J M Verfahren zum betreiben einer pressenpartie und vorrichtung zum durchfuehren des verfahrens

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408119A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
CH670217A5 (fr) * 1986-06-20 1989-05-31 Escher Wyss Gmbh
US5140897A (en) * 1989-08-09 1992-08-25 Beloit Corporation Extended nip press apparatus
ATE104382T1 (de) * 1989-10-10 1994-04-15 Nils Anders Lennart Wikdahl Verfahren und vorrichtung zur herstellung eines cellulosebreis von verbesserter qualitaet.
DE4017433A1 (de) * 1989-10-11 1991-04-25 Escher Wyss Gmbh Walzenpresse
DE4321400A1 (de) * 1993-06-26 1993-11-11 Voith Gmbh J M Schuhpresse mit in Sektoren aufgeteiltem Druckraum

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564381A5 (en) * 1973-05-11 1975-07-31 Escher Wyss Ag Rolling mill with at least two rollers - ends of rolls contain grooves or reduced roll-barrel thickness to premit flexure
US4570314A (en) * 1981-06-24 1986-02-18 Escher Wyss Aktiengesellschaft Press roll
DE4319323A1 (de) * 1993-06-11 1993-11-04 Voith Gmbh J M Verfahren zum betreiben einer pressenpartie und vorrichtung zum durchfuehren des verfahrens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6942761B1 (en) * 1998-01-12 2005-09-13 Voith Sulzer Papiertechnik Patent Gmbh Press device and method of using the same
US7722744B2 (en) * 2003-10-31 2010-05-25 Voith Paper Patent Gmbh Pressing device

Also Published As

Publication number Publication date
JP3795576B2 (ja) 2006-07-12
ATE184338T1 (de) 1999-09-15
CA2179545C (fr) 2007-08-21
DE19522761A1 (de) 1997-01-02
CA2179545A1 (fr) 1996-12-28
JPH0913292A (ja) 1997-01-14
DE19522761C2 (de) 2000-11-16
US5753083A (en) 1998-05-19
DE59602989D1 (de) 1999-10-14
EP0752495B1 (fr) 1999-09-08

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