EP2138631A1 - Installation de séchage et cylindre - Google Patents

Installation de séchage et cylindre Download PDF

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Publication number
EP2138631A1
EP2138631A1 EP09162916A EP09162916A EP2138631A1 EP 2138631 A1 EP2138631 A1 EP 2138631A1 EP 09162916 A EP09162916 A EP 09162916A EP 09162916 A EP09162916 A EP 09162916A EP 2138631 A1 EP2138631 A1 EP 2138631A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
arrangement according
drying arrangement
support core
support
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Withdrawn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
EP09162916A
Other languages
German (de)
English (en)
Inventor
Thomas Gruber-Nadlinger
Alexander Studentschnig
Bernhard Schleidt
Michael Panzenböck
Ansgar MÜLLER
Norbert Karner
Jürgen Jantschgi
Nikolaus Dr. Friedl
Thomas Hackl
Harald Graf-Müller
Günter HALMSCHLAGER
Herbert Boden
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2138631A1 publication Critical patent/EP2138631A1/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Withdrawn legal-status Critical Current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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell

Definitions

  • the invention relates to a drying arrangement for drying a running fibrous web, in particular paper, board or tissue web, with a heatable, a rotary jacket comprising cylinder, in particular drying cylinder to which the fibrous web is guided between this and with an outer impermeable press belt, and with at least one printing device for acting upon the outer press belt encircling the heatable cylinder together with the fibrous web. It further relates to a heatable, rotatable jacket having cylinder for such a drying arrangement. Drying devices of the type mentioned are in the publications EP-A-1 780 331 . WO 2005/100682 . DE-A-10 2004 017 810 and WO-A-2006/072505 described.
  • the fibrous web is pressed to improve the rate of drying of the heated cylinder to increase the heat transfer from the cylinder to the web by a correspondingly improved contact.
  • the squeezing out of the water from the web is an important factor.
  • the properties of the fibrous web can be positively influenced by the pressing operation in combination with the temperature.
  • the pressing can be done for example by a pressurized water jacket, which wraps around the cylinder over an angular range of 270 to 300 °, for example, so that the fibrous web can be guided by before and after arranged rollers around the cylinder.
  • the water jacket can therefore not be closed, so that depending on the pressure and pressure distribution within the pressure hood or pressure zones within the hood result in significant differential forces, which cause high bending forces when the drying cylinder is rotating and can lead to high bearing forces in the bearings on the driver side and on the drive side.
  • a support means is provided below the cylinder, which may comprise one or two support rollers, a plurality over the width of the cylinder juxtaposed rollers, a support shoe or a support band.
  • a support means is provided below the cylinder, which may comprise one or two support rollers, a plurality over the width of the cylinder juxtaposed rollers, a support shoe or a support band.
  • an external support device requires a relatively large amount of space, which is often not available.
  • the invention has for its object to provide an improved drying arrangement of the type mentioned, in which the aforementioned problems are eliminated. It should be achieved in particular that, despite the high, resulting from the pressure differences acting on the cylinder, the stresses in the outer shell or cylinder jacket and, accordingly, the deflection of the cylinder jacket are kept as low as possible.
  • this object is achieved in that the cylinder jacket is penetrated by a non-rotatable support core and is rotatably supported on this.
  • the loads in the cylinder jacket or outer shell are reduced to a minimum, whereby the deflection of the cylinder jacket is correspondingly lower.
  • the support core is fixedly connected to a cylinder associated with the Friction.
  • the support structure formed by the core is designed rotatably, so it can be rigidly connected to the chair.
  • the cylinder shell or outer shell which is more or less rigid, rotates on the stationary support core.
  • the support core Due to the firm restraint in the stiffening of the non-rotatable support core can also initiate bending moments in this, which already a deflection-reduced bending line can be achieved. Since the support core also does not have to be accelerated or decelerated, its weight, which may be greater in a particularly stable design, is of secondary importance.
  • the structure of the support core can be performed in segments, are only individual, smaller and correspondingly lighter components to transport, which then have to be assembled in the paper mill.
  • the support core may have an at least substantially cylindrical shape.
  • the support core has a Vorkrümmung.
  • the support core is preferably hollow. So he may for example have a hollow cylindrical shape.
  • At least one support element, in particular strut, preferably extending transversely to the cylinder axis is arranged in the interior of the hollow support core.
  • At least one support element is variably adjustable.
  • the or the support elements may advantageously be variably adjustable for adjustment to a respective predetermined pre-curvature of the cylinder jacket.
  • the support core can be set permanently in addition to support or adjusting elements in such a way or variably adjusted during operation that under the operating load, in particular the ever after changing the weight force presents a minimal deformation of the rotating shell or the cylinder jacket.
  • the support elements or adjusting elements may in particular be mechanical, electrical, hydraulic and / or pneumatic elements.
  • means are provided for automatically adjusting the setting of the support element (s) to the load distribution along a line, preferably along the cylinder axis, occurring during operation on the cylinder, and / or three-dimensionally to the cylinder jacket deformation occurring during operation ,
  • means are provided for, in particular, automatic monitoring of the stresses and / or deformations occurring in the cylinder jacket and / or in the support core during operation, as well as means, in particular control and / or regulating means, in particular during operation for an at least partial compensation of these voltages or Deformations over the or the support elements to deform the support core accordingly.
  • the adjustment of the support elements can thus be tuned, for example along a line and / or depending on the load distribution three-dimensionally on the shell or cylinder jacket deformation.
  • the cylinder jacket mounted on the stationary support core must also be held axially, but does not have to be connected to the support core, different thermal expansions of the rotating cylinder jacket and the stationary support core in the axial direction are permissible or irrelevant in principle. So there are generally different dimensions permissible in the axial direction due to different temperatures and / or materials with different thermal expansion.
  • the cylinder jacket is rotatably supported on the support core via a plurality of consecutive positions in the direction of the cylinder axis.
  • the bearing of the rotating cylinder jacket on the non-rotatable or stationary core can be carried out conventionally via ball, roller or barrel bearings or any combination thereof, via hydrostatic, hydrodynamic or aerostatic and / or aerodynamic bearings such as air bearings or hot steam bearings.
  • the cylinder jacket is rotatably supported by bearings on the support core, which lubricant is supplied, which is provided at the same time for heating the cylinder jacket or for cooling the support core.
  • the lubricating medium may also be used to cool the support core, e.g. when using materials of higher temperature sensitivity, e.g. Carbon fiber with resin system. It may also be equal to the heating medium, e.g. Water and / or water vapor.
  • bearing and rolling bearings or plain bearings can be used.
  • the bearings over which the cylinder jacket is rotatably supported on the support core at least partially in particular for keeping constant the lubrication gap and / or for compensation of the curvature occurring under load and / or deformation of the support core in the radial direction of the cylinder adjustable.
  • the cylinder according to the invention is characterized accordingly by the fact that the jacket is penetrated by a non-rotatable support core and is rotatably supported on this.
  • this cylinder may in particular be designed as indicated above.
  • the outer press belt is designed to be impermeable. This is particularly favorable when using a pressure hood as a printing device.
  • the fibrous web is guided between the outer press belt and at least one arranged between this and the fibrous web, the absorption of moisture serving porous fabric.
  • the vapor evaporated from the fibrous web in the porous covering is condensed via the colder fluid in the pressure hood.
  • the heatable cylinder is acted upon by a printing device together with the fibrous web encircling porous fabric and the outer press belt.
  • the printing device can be designed as a pressure hood. This is advantageous for drying according to the condensation principle, as used in the "BoostDryer" version.
  • the printing device can also be designed as a belt press.
  • an outer band is preferably provided, which is designed for high tensile stresses. By the tensile stress can be exerted in the region of the wrap of the cylinder on the fibrous web and / or the fabrics.
  • a cylinder 10 for a drying arrangement for drying a running fibrous web which may be in particular a paper, board or tissue web.
  • the cylinder 10 comprises a heatable, rotatable jacket 12.
  • the fibrous web can be guided around the cylinder 10 together with an outer impermeable press belt and at least one porous covering arranged between it and the fibrous web for absorbing moisture.
  • at least one pressure hood may be provided in the respective drying arrangement for acting on the outer press belt which surrounds the heatable cylinder 10 together with the porous covering and the fibrous web.
  • the cylinder jacket 12 is penetrated by a non-rotatable support core 14 and rotatably supported on this.
  • the support core 14 in particular be firmly connected to a cylinder 10 associated with Friction.
  • the support core 14 is connected at its two ends in each case via a connecting flange 16 fixed to the chair.
  • the support core 14 may be composed of several segments.
  • the support core 14 may have an at least substantially cylindrical shape or also a pre-curvature.
  • the support core 14 may be hollow in particular.
  • At least one preferably 20 extending transversely to the cylinder axis support member 20 may be arranged, which may in particular be a strut or the like.
  • the cylinder axis 18 may be arranged, which may in particular be a strut or the like.
  • several in the direction of the cylinder axis 18 successive, preferably each transverse to the cylinder axis 18 extending support elements 20 are provided.
  • the support elements 20 may be at least partially variably adjustable. In this case, the or the support elements 20 can be variably adjusted in particular for setting a respective predetermined pre-curvature of the cylinder jacket 12 accordingly.
  • Means may be provided for adjusting the support element 14 automatically, in particular, to the load distribution along a line, preferably along the cylinder axis 18, occurring during operation on the cylinder 10, and / or three-dimensionally to the cylinder jacket deformation occurring during operation vote.
  • means may be provided for, for example, automatic monitoring of the stresses and / or deformations occurring in the cylinder jacket 12 and / or in the support core 14 during operation, as well as means, in particular control and / or regulating means, in particular during operation for at least partially Compensation of these stresses or deformations on the or the support elements 20 to deform the support core 14 accordingly.
  • the cylinder jacket 12 can be rotatably supported on the support core 14 via a plurality of bearings 22 following one another in the direction of the cylinder axis 18.
  • the bearings 22 supplied lubricant may be provided simultaneously for heating the cylinder jacket 12 or for cooling the support core 14.
  • the bearings 22 can at least partially be adjustable in the radial direction of the cylinder 10 at least in particular for keeping the lubrication gap constant and / or for compensating for the curvature and / or deformation of the support core 14 that occurs under load.
  • the support core 14 is thus connected via the connecting flanges 16 fixed to the chair.
  • the support core 14 is reinforced by support members 20 in the form of struts, which can also be made adjustable to give the support core 14 a corresponding Vorkrümmung, which is then compensated under load by a single-ended hood pressure load again.
  • the support members 20 may therefore be fixed or fixed or variably adjustable.
  • the cylinder jacket 12 can be designed to be correspondingly thin for optimum heat conduction, so that it is also loaded by lower thermal stresses.
  • the heating medium 24 can flow axially through the cylinder jacket 12, but also fed and / or discharged radially through the bearings 22 and / or the support core 14.
  • the lubricant for the bearings 22 may also be used for heating and / or cooling the support core 14 and / or the cylinder jacket 12 or outer shell.
  • the cylinder jacket 12 does not necessarily have to be designed as a chamber as shown in the single figure.

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  • Drying Of Solid Materials (AREA)
EP09162916A 2008-06-26 2009-06-17 Installation de séchage et cylindre Withdrawn EP2138631A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810002656 DE102008002656A1 (de) 2008-06-26 2008-06-26 Trocknungsanordnung

Publications (1)

Publication Number Publication Date
EP2138631A1 true EP2138631A1 (fr) 2009-12-30

Family

ID=41078263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09162916A Withdrawn EP2138631A1 (fr) 2008-06-26 2009-06-17 Installation de séchage et cylindre

Country Status (2)

Country Link
EP (1) EP2138631A1 (fr)
DE (1) DE102008002656A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452408A (zh) * 2014-10-30 2015-03-25 天津科技大学 一种新型大直径干燥烘缸

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984002573A1 (fr) * 1982-12-20 1984-07-05 Skandinaviska Apparatind Echangeur de chaleur rotatif
DE3431713A1 (de) * 1984-01-10 1985-07-18 Josef van Baal GmbH, 4150 Krefeld Als waermetauscher dienende walze
GB2178509A (en) * 1985-06-18 1987-02-11 Escher Wyss Ag Roller for the treatment of a web of material and its use
DE19724911A1 (de) * 1997-06-12 1998-12-17 Voith Sulzer Papiermasch Gmbh Preßeinheit
WO2005100682A1 (fr) 2004-04-13 2005-10-27 Voith Patent Gmbh Machine destinee a la fabrication d'une bande de matiere fibreuse
DE102004017810A1 (de) 2004-04-13 2005-10-27 Voith Paper Patent Gmbh Trockenanordnung
WO2006072505A1 (fr) 2005-01-05 2006-07-13 Voith Patent Gmbh Dispositif et procede de production et/ou de transformation d'une bande de matiere fibreuse
EP1780331A1 (fr) 2005-10-28 2007-05-02 Voith Patent GmbH Ensemble de séchage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984002573A1 (fr) * 1982-12-20 1984-07-05 Skandinaviska Apparatind Echangeur de chaleur rotatif
DE3431713A1 (de) * 1984-01-10 1985-07-18 Josef van Baal GmbH, 4150 Krefeld Als waermetauscher dienende walze
GB2178509A (en) * 1985-06-18 1987-02-11 Escher Wyss Ag Roller for the treatment of a web of material and its use
DE19724911A1 (de) * 1997-06-12 1998-12-17 Voith Sulzer Papiermasch Gmbh Preßeinheit
WO2005100682A1 (fr) 2004-04-13 2005-10-27 Voith Patent Gmbh Machine destinee a la fabrication d'une bande de matiere fibreuse
DE102004017810A1 (de) 2004-04-13 2005-10-27 Voith Paper Patent Gmbh Trockenanordnung
WO2006072505A1 (fr) 2005-01-05 2006-07-13 Voith Patent Gmbh Dispositif et procede de production et/ou de transformation d'une bande de matiere fibreuse
EP1780331A1 (fr) 2005-10-28 2007-05-02 Voith Patent GmbH Ensemble de séchage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452408A (zh) * 2014-10-30 2015-03-25 天津科技大学 一种新型大直径干燥烘缸

Also Published As

Publication number Publication date
DE102008002656A1 (de) 2009-12-31

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