EP1836346B1 - Device and method for producing and/or transforming a web of fibrous material - Google Patents

Device and method for producing and/or transforming a web of fibrous material Download PDF

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Publication number
EP1836346B1
EP1836346B1 EP05811124A EP05811124A EP1836346B1 EP 1836346 B1 EP1836346 B1 EP 1836346B1 EP 05811124 A EP05811124 A EP 05811124A EP 05811124 A EP05811124 A EP 05811124A EP 1836346 B1 EP1836346 B1 EP 1836346B1
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EP
European Patent Office
Prior art keywords
cylinder shell
shell
inner cylinder
outer cylinder
drying
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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.)
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Application number
EP05811124A
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German (de)
French (fr)
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EP1836346A1 (en
Inventor
Thomas Gruber-Nadlinger
Günter HALMSCHLAGER
Christoph Haase
Herbert Boden
Norbert Karner
Peter Kastner
Günter SEITLHUBER
Gerhard HÖLTMANN
Andreas Figerl
Rainer Kloibhofer
Erich Rollenitz
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP1836346A1 publication Critical patent/EP1836346A1/en
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Publication of EP1836346B1 publication Critical patent/EP1836346B1/en
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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
    • D21F5/022—Heating the cylinders
    • D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell
    • 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
    • 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

Definitions

  • the present invention relates to a device for producing and / or finishing a fibrous web, in particular paper or board web, with a heatable and rotatable cylinder, in particular drying cylinder of a dryer section, with an acted upon from the inside with a heating fluid cylinder jacket.
  • Such a heated cylinder is known from the DE 102 60 509.2 .
  • tensile stresses which arise because the inner region of the cylinder expands more than the outer region, are minimized by the fact that the cylinder jacket consists of at least two cladding layers and the material of the outer cladding layer at a mounting temperature below the average operating temperature is, a larger coefficient of thermal expansion and at a mounting temperature, which is above the average operating temperature, a smaller coefficient of thermal expansion than the material of the inner cladding layer has.
  • Another measure is that the layer thickness of the outer cladding layer is less than that of the inner cladding layer.
  • a dryer for drying a fibrous web in which a flow cylinder is used in conjunction with a Anblasaube.
  • This is provided with a nozzle arrangement, with the aid of which drying gas jets are applied to the outer surface of the web to be dried, while this is guided around the heated cylinder over a sector of about 270 ° or more.
  • the jacket of the cylinder is provided with a system of ductwork into which a coolant can be directed from a coolant source.
  • Embodiments of heatable rotatable cylinder in two-shell construction with an acted upon from the inside with a heating fluid cylinder jacket, wherein below the outer surface of the cylinder jacket at least one channel is formed for the passage of the heating fluid, are already known in a variety of designs. Representative becomes on the pamphlets US 4,758,310 . WO 02/095125 A . EP 0 903 438 A2 and US 4,955,268 directed.
  • An embodiment with a one-piece inner cylinder jacket and from individual curved executed and hollow cylindrical segments forming cover plates formed outer cylinder shell is in the document US 4,453,593 disclosed.
  • the channels are arranged on the outer circumference of the inner cylinder jacket and webs forming projections and the outer cylinder shell generated.
  • the cover plates extend in such a way over a portion of the cylinder jacket in the circumferential direction that they cover the space between two circumferentially adjacent webs arranged.
  • the connection between two such cover plates and a web via a welded joint.
  • the weld must therefore be designed for the forces oriented in different directions within the joints created by them.
  • At least one channel for the passage of the heating fluid is formed below the outer surface of the cylinder jacket.
  • the heating fluid can be brought very close to the outer surface of the heated cylinder.
  • the temperature gradient is thereby lower than in the known devices of the type mentioned and, accordingly, the drying performance is increased.
  • a further cylinder jacket is arranged within the cylinder jacket, which is spaced from the outer cylinder shell to form the at least one channel.
  • the outer cylinder shell is supported on the inner cylinder shell.
  • the wall thickness of the outer cylinder shell can be kept low because the inner cylinder shell acts as a support cylinder. The drying performance can be increased even further.
  • connecting means may be provided for supporting the outer cylinder jacket on the inner cylinder jacket. It is important that the connecting means are distributed over the surface of both cylinder jackets to ensure a uniform support.
  • the webs or other connecting elements can extend axially, in the circumferential direction and / or in an intermediate direction. In all cases good support can be achieved.
  • the heating fluid can then flow not only in the circumferential direction but also in the longitudinal direction of the drying cylinder.
  • Inner jacket and outer jacket of the drying cylinder can be made of the same or different material. It is advantageous in In any case, if it is a metallic material, because then a good heat conduction and a sufficient stability are guaranteed.
  • the outer jacket material is preferably used with high thermal conductivity. It is especially steel, preferably boiler steel, copper, aluminum or bronze into consideration. Thus, a good heat transfer to the fibrous web can be ensured.
  • the formation of the inner cylinder as a thick-walled tube. This ensures a good carrying quality.
  • the inner cylinder may also consist of two or more individual shells.
  • the thermal expansion behavior and the load capacity can be improved thereby.
  • the inner cylinder can also be designed as a truss or frame rib construction. In certain applications, this may also be advantageous.
  • the inside of the outer cylinder jacket is provided with elevations.
  • the accumulating on the inside of the outer cylinder shell condensate is added to turbulence, whereby the heat transfer improves.
  • the accumulating condensate acts namely heat-insulating and increases the temperature gradient to the cylinder surface.
  • the inside of the outer cylinder jacket surface with ribs and / or nubs and / or a Grid or honeycomb structure formed is formed.
  • the height of the elevations on the inside of the outer cylinder jacket is preferably selected so that it protrudes from the fluid condensate forming during operation. In this way, the elevations have direct contact with the heating fluid, whereby the heat can be better directed to the outer surface of the drying cylinder. In addition, the enlargement of the surface by the surveys has a positive effect on the heat transfer. Therefore, elevations with a lower height than the condensate level are also advantageous.
  • the elevations preferably extend in the cylinder longitudinal direction and / or along a helix.
  • a helical line By a helical line, a special conveying effect for condensate removal can be achieved.
  • one or more siphons are provided according to an embodiment of the invention. These can be co-rotating or stationary with the drying cylinder. The accumulating condensate on the inside of the outer cylinder shell can be reduced.
  • the outer surface of the drying cylinder may be provided with a coating or cover. This is used in particular for corrosion or abrasion protection or to improve the surface, for example, to avoid the sticking of paper.
  • web plates are provided as connecting elements between the inner and outer cylinder jacket, which are connected to the inner cylinder jacket.
  • the outer cylinder jacket is formed by cover plates.
  • the web and cover plates are combined into profiles, preferably U-shaped or T-shaped.
  • the outer jacket and the connecting elements are manufactured in one piece, in particular by welding, milling from a tube, casting or by other manufacturing methods.
  • the outer cylinder jacket and the inner cylinder jacket can be advantageously connected to each other by press fitting. Another possibility is a screw connection. Also advantageous is a conical seat or a positive connection, in particular L, T or dovetail connection. In order to produce backlash in the connection, a soldering material can be additionally attached, which melts in subsequent heating of the cylinder and then cured again. But it can also be chosen to the tolerances that there is no game.
  • the inner cylinder jacket is formed from individual sheets, which in a suitable manner, for example welding, with the connecting elements and interconnected are. It can also be made in this way, both the inner cylinder shell and the outer cylinder shell.
  • bolts are provided as connecting elements between the inner and outer cylinder jacket, which are introduced into holes in the outer cylinder shell and connected to the inner cylinder jacket, for example by friction or resistance pressure welding or by screwing.
  • the connection of bolts and outer cylinder jacket in the holes is preferably then, for example by welding.
  • bolts introduced into holes of the outer cylinder jacket bolts introduced into holes of the inner cylinder jacket can also be provided, which are then connected to the outer cylinder jacket.
  • the inner cylinder jacket can be manufactured in one piece over its entire length, for example by casting.
  • the inner cylinder jacket and connecting elements are manufactured as one part, to which the outer shell is then fastened by a suitable method.
  • connection results when the webs between the inner cylinder shell and the outer cylinder shell are divided in height obliquely. That is, a partial web is respectively provided on the inner cylinder shell and a partial web on the outer cylinder shell. By rotating inner and outer cylinder jacket against each other, these web parts are brought together and made a positive connection.
  • corresponding channels are provided in the axis of the drying cylinder.
  • the leading channel and the returning channel can be nested inside each other. This saves space and simplifies the construction.
  • the heating fluid can be distributed to the cavity between the inner and outer cylinder jacket. This is particularly advantageous when viewed over the circumference many individual channels are arranged side by side, for example, in the longitudinal direction of the drying cylinder continuous webs between the inner and outer cylinder jacket or a single bore drilled coat.
  • the elevations on the inside of the outer cylinder shell can be milled, drawn, pressed, rolled or cast. Other types of production are possible.
  • the webs, sheets or other connecting elements between the inner and outer cylinder jacket can be made by machining, ur- or forming technology. A combination of these methods is possible.
  • a device of the type mentioned is preferably used for producing a fibrous web, in particular paper or board web.
  • a drying cylinder of the type mentioned or several such drying cylinders can be used.
  • a drying cylinder according to the present invention may also be combined with conventional drying cylinders.
  • the fibrous web can be contacted in the manufacture of the drying cylinders each on the same side. But it is also a two-sided contact possible. Depending on the application, one or the other variant is advantageous.
  • all known ancillary equipment can be used, for example suction or blow box, suctioned or uninsprayed roller, airfoil or dryer fabric.
  • Cylinder drying, Boost-Dryer processes, Condebelt processes, Yankee cylinders and Hi-dryers are particularly suitable as conventional drying processes.
  • a metal band can also be passed over the drying cylinder. This is preferably cooled and is under tension. As a result, the temperature gradient can be increased over the fibrous web and thus a rapid removal of moisture can be achieved.
  • the drying capacity can be increased. This allows a finished drying paper can be achieved with less residence time. This can be used on the one hand, that compared to a dryer section according to the prior art, less space is needed, resulting in savings in the base price, the construction costs for the hall, machine seating and the hood and the operating costs for drives and hood ventilation. On the other hand, this can be used by increasing the speed of the dryer section given the same space conditions, for example paper machine conversions. The paper machine can thereby be operated more economically.
  • the vapor pressure can be lowered. The differential vapor pressure could be used, for example, to generate electricity, or the energy for steam generation can be minimized.
  • Fig. 1 shows a drying cylinder in the dryer section of a paper machine.
  • the drying cylinder comprises an outer cylinder jacket 1 and an inner cylinder jacket 2 arranged concentrically therein.
  • the inner cylinder jacket 2 is fastened by screws 3 to two end caps 4, which are disc-shaped and each have a bearing axis 5, 6.
  • On the left in Fig. 1 is drive side, on the right side of the leader of the drying cylinder.
  • the outer cylinder shell 1 has an outer surface 7, over which a paper web to be dried is guided.
  • the outer surface 7 of the outer cylinder jacket 1 is flush with the peripheral surfaces 8 of the two covers 4 executed. This creates a continuous contact surface for the paper web.
  • the outer cylinder jacket 1 has a thickness d 1 which is smaller than the thickness d 2 of the inner cylinder jacket 2.
  • the inner circumferential surface 9 of the outer cylinder jacket 1 faces the outer jacket surface 10 of the inner cylinder jacket 1 Cylinder jacket 2 at a distance, so that between the outer cylinder shell 1 and inner cylinder shell 2, a ring-shaped cavity 11 is formed.
  • This annulus 11 is on both ends of the two cylinder mantles 1, 2 via channels not shown here in the lids 4 with radial channels 12, 13 in the two axes 5, 6 of the cover 4 in connection.
  • the radial channels 12 of the axis 5 of the driver side cover 4 are in turn connected to an axial channel 14 in connection, which is centrally provided in the axis 5 of the driver side cover 4 and opens into a connection end 15.
  • the radial channels 13 of the axis 6 of the drive-side cover 4 with an axial channel 16 in connection This channel 16 is guided starting from the drive-side cover 4 concentric to the axis of rotation I of the drying cylinder centrally through the two cylinder shells 1, 2 and the axis 5 of the driver-side cover 4 and also opens into a connection end 17.
  • the channel 16 penetrates the channel 14 concentrically, so that the channel 14 has an annular cross-section.
  • the described construction results in a channel system which allows a circulation of heating fluid through the cavity 11 between the outer cylinder shell 1 and the inner cylinder shell 2.
  • heating fluid is supplied via the connection end 15 in the annular channel 14. From there, the heating fluid passes through the radial channels 12 in the channels, not shown, in the driver side cover 4 and of these in the cavity 11 between the outer cylinder shell 1 and inner cylinder shell 2.
  • the heating medium then flows from the leader side through the cavity 11 on the drive side and passes there via the channels, not shown in the drive-side cover 4 in the radial channels 13 of the drive-side axis 6. From there, in turn, the heating fluid flows through the central channel 16 back to the terminal end 17th
  • the outer cylinder shell 1 has on both end sides in each case tapered portions 18, with which the outer cylinder shell 11 each rests on a corresponding seat 19 on the peripheral sides of the cover 4.
  • the outer cylinder jacket 1 is supported on the two covers 4.
  • the main support of the outer cylinder shell 1 takes place over its length by means of connecting elements 20, as exemplified in Fig. 2 are shown and which are arranged distributed over the peripheral surfaces of the outer cylinder shell 1 and the inner cylinder shell 2.
  • Fig. 2 also shows a siphon 21, which is provided for the removal of condensate at the front end of the cavity 11.
  • Such siphons 21 may be provided both on the drive side and on the driver's side and be formed either co-rotating or stationary. In the circumferential direction and several such siphons can be provided.
  • Fig. 3 to 5 show a peripheral portion of a drying cylinder according to the invention having an outer cylinder shell 1 of small thickness d 1 and an inner cylinder jacket 2. In contrast, a larger thickness d. 2 Between the outer cylinder shell 1 and the inner cylinder shell 2, a cavity 11 for passing a heating fluid is present.
  • FIG. 3 At A1 in Fig. 3 is a screw connection between the outer cylinder shell 1 and inner cylinder shell 2 is shown.
  • the inner cylinder shell 2 has for this purpose holes 22 through which screws 23 are passed.
  • the outer cylinder shell 1 Opposite to the holes 22 in the inner cylinder shell 2, the outer cylinder shell 1 radially inwardly facing projections 24, in which threaded holes 25 are provided, in which the screws 23 are screwed.
  • the outer cylinder shell 1 is supported on the inner cylinder shell 2, and the screws 23 set the two cylinder mantles 1, 2 against each other.
  • a radial projection may be provided only with the screws 23 or may extend continuously in the axial direction of the drying cylinder or in another direction.
  • connection is shown which largely matches the connection of A2.
  • the diameter of the screw holes 22 and the screws 23 is smaller than the corresponding diameters at A2.
  • M10 screws can be used on A2 and M8 screws on A3. The smaller screws save weight compared to larger screws.
  • connection of A3 is shown at A4.
  • the difference is that here the seat 26 is not milled tangentially but at an angle of 2 ° to the tangential direction.
  • the milled cut serves to clamp the outer cylinder jacket 1 with respect to the inner cylinder jacket 2.
  • the outer cylinder jacket is after being applied to the inner cylinder shell 2 in the direction of the rising Seat 26, that is, in Fig. 3 turned to the right about the axis I of the drying cylinder.
  • connection shown at A5 An even stronger jamming is realized in the connection shown at A5.
  • the angle of the cut against the tangential direction is 5 °.
  • this connection is the same as the A4 connection.
  • a seat 26 milled at 5 ° with respect to the horizontal direction is present.
  • the radial projection 24 of the outer cylinder shell 1 is not straight executed as in the variants described above but has L-shape.
  • the foot 27 of the L-shaped projection 24 is supported on the milled seat 26 from. The support becomes even more stable.
  • an L-shaped projection 24 can also be combined with a seat 26 milled at 0 ° or a seat 26 milled at 10 °.
  • the outer cylinder shell 1 may be provided on its inner circumferential surface 9 with elevations 28. These are used to put a condensate accumulating in turbulence in order to improve the heat conduction to the outer surface 7 of the outer cylinder shell 1.
  • elevations 28 are used to put a condensate accumulating in turbulence in order to improve the heat conduction to the outer surface 7 of the outer cylinder shell 1.
  • the height of the elevations 28 is preferably each chosen so that they protrude at least a certain extent from the condensate so that they are acted upon directly by the heating medium and thus cause a good additional heat conduction to the outer surface 7 of the outer cylinder shell 1.
  • Fig. 4 shows different variants of a positive connection between the outer cylinder shell 1 and inner cylinder shell 2.
  • the outer cylinder shell 1 may be provided on its inner shell side 9 in the axial direction or another direction extending projections 29, in which the inner cylinder shell 2 out open, T-shaped grooves 30 are provided.
  • Corresponding T-shaped grooves 31, which open to the outer cylinder shell 1, are provided in the outer surface 10 of the inner cylinder shell 2.
  • double T-beam 32 is then a positive connection between the outer cylinder shell 1 and inner cylinder shell 2, which also causes a support of the outer cylinder shell 1 on the inner cylinder shell 2.
  • the double-T-beams 32 may have such an outer dimension that a game between them and the T-slots 30, 31 results, in particular a back and side play.
  • the assembly is carried out by inserting the double-T-shaped carrier 32 in the grooves 30, 31, after the outer cylinder shell 1 has been pushed onto the inner cylinder shell 2.
  • T-shaped grooves 33 are provided in the outer surface 10 of the inner cylinder shell 2. In this, however, engage in cross-section T-shaped projections 34 on the inner shell side 9 of the outer cylinder shell 1.
  • the assembly is done here by simply pushing the outer cylinder shell 1 on the inner cylinder shell 2. Again, the connection can be formed with or without play.
  • the groove 33 may preferably be milled into the outer surface 10 of the inner cylinder jacket 2. But there are also other manufacturing methods possible.
  • the variant shown at B3 differs from the variant shown at B2 in that the groove 33 for receiving the cross-sectionally T-shaped projection 34 is not milled into the outer surface 10 of the inner cylinder shell 2 but is formed by welding a corresponding groove profile 35.
  • the projection 34 is formed correspondingly shorter and is supported on the groove profile 35 on the outer surface 10 of the inner cylinder jacket 2 from.
  • the connection is preferably formed with back and side play. Compared to the variant of B1 no groove in the inner cylinder shell 2 is therefore required here.
  • the variant of B4 is largely consistent with the variant of B3.
  • the only difference is that the groove profiles 35 are not welded to the inner cylinder shell 2 but are screwed by screws 36.
  • the groove profiles 35 have for this purpose lateral threaded holes 37.
  • the variant shown at B 5 is characterized by the fact that are screwed onto the Au Ben chiefsseite 9 of the inner cylinder shell 2 profiles 38, which have on their radial outer side a cross-sectionally T-shaped portion 39 in the groove 30 of a projection 29th is inserted, which coincides in principle with the projection 29 shown at B1. Screws 36 are screwed into corresponding, provided in lateral flanges 40 of the profile 38 threaded holes 41 for this purpose. Also in this variant, a back and side clearance between the T-section 39 and the groove 30 is preferably present.
  • the variant shown at B6 is similar to the variant shown at B5. Instead of the profile 38, a T-profile 42 is provided here, which is inserted into a groove 43 on the outer side 10 of the inner cylinder jacket 2 is. In addition, only a number of screws 36 is inserted into corresponding threaded hole 44 of the profile 42 for fastening the profile 42.
  • the variant shown at B7 is largely consistent with the variant of B4.
  • the groove profile 45 is here, however, formed with two outwardly facing flanges 46, in each of which threaded holes 47 are provided for screwing in the screws 36.
  • the groove profile 45 is brought closer to the inner surface 9 of the outer cylinder shell 1, so that the cross-sectionally T-shaped projection 34 is correspondingly shorter.
  • the variant shown at B8 in turn is largely consistent with the variant of B3.
  • the groove profile 48 is not welded here with the inner cylinder shell 2 but again connected by screws 36.
  • the groove profile 48 on its side facing the inner cylinder jacket 2 side corresponding threaded holes 49.
  • the groove profile 48 is guided here closer to the inner surface 9 of the outer cylinder shell 1 as in the variant of B7 and cooperates with correspondingly shorter protrusions 34 on the inner side 9 of the outer cylinder shell 1.
  • FIG. 4 illustrated form-fitting variants may be provided on the inside 9 of the outer cylinder shell 1 elevations 28 for generating turbulence in a forming condensate.
  • the elevations 28 may again have all possible shapes and orientations, but preferably protrude a small distance beyond the condensate.
  • Fig. 5 shows four other form-locking variants.
  • a variant is shown in which on the outer upper side 10 of the inner cylinder jacket 2, an angle section 50 is welded. With this angled section 50, a cross-sectionally L-shaped projection 51 cooperates, which is formed on the inner side 9 of the outer cylinder shell 1.
  • the foot 52 of the profile 51 engages under the angle section 50 and is supported on a milled at 5 ° seat 53 on the outer side 10 of the inner cylinder shell 2 from.
  • By appropriate profiling of the projection 51 results in a self-locking connection between the outer cylinder shell 1 and the inner cylinder shell. 2
  • the outer cylinder jacket 1 is slid axially onto the inner cylinder jacket 2 in the position of the projection 51 shown dashed at C1. Then, the outer cylinder jacket 1 relative to the inner cylinder jacket 2 in the direction of the angle section 50, in Fig. 5 that is, to the right, about the axis of the drying cylinder rotated by the distance r, so that the projection 51 engages with its foot 52, the angle section 50 and is set self-locking.
  • the variant shown at C2 is largely consistent with the variant of C1.
  • the inner cylinder shell 2 is provided with holes 54 through which screws 55 are guided, which are screwed into threaded holes 56 which are provided in lugs 57 which on the foot 52 of the L-shaped projection 51 opposite side of the projection 51 in suitable distances are provided in the axial direction.
  • the assembly takes place in the same way as in the Variant of C1, wherein only after the rotation of the two cylinder jackets 1, 2 against each other nor the screws 55 are screwed.
  • Such a milled seat is again present in the variant shown at C4.
  • This seat 60 is tangentially milled in this variant.
  • this variant is consistent with the variant of C3.
  • the assembly takes place in both variants of C3 and C4 according to the variant of C2 by rotating the outer cylinder shell 1 relative to the inner cylinder shell 2 after pushing the outer cylinder shell 1 and then screwing the screws 55th
  • Fig. 6 finally shows again simplified the structure of the drying roller as a whole with outer cylinder shell 1, inner cylinder shell 2, which is fixed to the two covers 4, which in turn are arranged on axes 5, 6.
  • the driver-side axis 5, the radial channels 12 and the concentric axial channels 14 and 15, the drive-side axis 6 also radial channels 1 on. Not shown here are the connecting channels between the radial channels 12 and 13 and the cavity 11 between the outer cylinder shell 1 and inner cylinder shell 2.
  • the flow direction of the heating fluid is shown by arrows II.

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  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The invention relates to a device and a method for producing and/or transforming a web of fibrous material, in particular a paper or cardboard web. Said device includes a heatable and rotatable cylinder, in particular a drying cylinder of a drying section, and a cylinder sleeve which can be impinged from the inside by a heating fluid. In order to improve the heating power below the external surface of the cylinder sleeve, at least one channel is provided in order to guide the heating fluid.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Herstellung und/oder Veredelung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn, mit einem beheizbaren und rotierbaren Zylinder, insbesondere Trockenzylinder einer Trockenpartie, mit einem von innen mit einem Heizfluid beaufschlagbaren Zylindermantel.The present invention relates to a device for producing and / or finishing a fibrous web, in particular paper or board web, with a heatable and rotatable cylinder, in particular drying cylinder of a dryer section, with an acted upon from the inside with a heating fluid cylinder jacket.

Ein derartiger beheizter Zylinder ist bekannt aus der DE 102 60 509.2 . Bei dem bekannten Zylinder werden Zugspannungen, die entstehen, weil sich der innere Bereich des Zylinders stärker ausdehnt als der äußere Bereich, dadurch minimiert, dass der Zylindermantel aus wenigstens zwei Mantelschichten besteht und das Material der äußeren Mantelschicht bei einer Montagetemperatur, die unter der mittleren Betriebstemperatur liegt, einen größeren Wärmeausdehnungskoeffizienten und bei einer Montagetemperatur, die über der mittleren Betriebstemperatur liegt, einen kleineren Wärmeausdehnungskoeffizienten als das Material der inneren Mantelschicht hat. Eine weitere Maßnahme besteht darin, dass die Schichtdicke der äußeren Mantelschicht geringer als die der inneren Mantelschicht ist.Such a heated cylinder is known from the DE 102 60 509.2 , In the known cylinder, tensile stresses, which arise because the inner region of the cylinder expands more than the outer region, are minimized by the fact that the cylinder jacket consists of at least two cladding layers and the material of the outer cladding layer at a mounting temperature below the average operating temperature is, a larger coefficient of thermal expansion and at a mounting temperature, which is above the average operating temperature, a smaller coefficient of thermal expansion than the material of the inner cladding layer has. Another measure is that the layer thickness of the outer cladding layer is less than that of the inner cladding layer.

Bei derartigen Trocknungszylindern stellt sich bei der Papiertrocknung ein Temperaturgefälle zur Oberfläche hin ein. Die Oberflächentemperatur des Zylinders ist geringer als die Temperatur des Dampfs, mit dem der Zylinder beheizt wird; und somit ist die Trocknungskapazität beschränkt. Die Erhöhung der Sattdampftemperatur ist aus wirtschaftlichen Gründen meistens nicht sinnvoll.In drying cylinders of this kind, a temperature gradient arises in the paper drying process towards the surface. The surface temperature of the cylinder is less than the temperature of the steam used to heat the cylinder; and thus the drying capacity is limited. Increasing the saturated steam temperature is usually not useful for economic reasons.

Aus der EP 0 559 628 B1 ist ein Trockner zum Trocknen einer Faserstoffbahn bekannt, bei dem ein Durchflusszylinder in Verbindung mit einer Anblashaube zum Einsatz kommt. Diese ist mit einer Düsenanordnung versehen, mit deren Hilfe Trocknungsgasstrahlen auf die Außenfläche der zu trocknenden Bahn aufgebracht werden, während diese über einen Sektor von ca. 270° oder mehr um den beheizten Zylinder herumgeführt wird. Der Mantel des Zylinders ist mit einem System von Kanalleitungen versehen, in welches ein Kühlmittel von einer Kühlmittelquelle geleitet werden kann. Durch die Trocknungsgasstrahlen wird Wasser in der Bahn nach außen verdampft und über Räume in der Anblashaube entfernt. Andererseits kondensiert Wasser aus der Bahn auf der gekühlten Mantelfläche des Zylinders und wird über die Perforation im äußeren Mantel des Zylinders und einen im Inneren des Zylinders herrschenden Unterdruck abgesaugt. Der gesamte Innenraum des Zylinders steht zur Aufnahme des Kondensats zur Verfügung. Dadurch muss die Innenwand des Zylinders eine gewisse Mindestwandstärke aufweisen, um den Druckbelastungen bei den verwendeten Zylinderdurchmessern standhalten zu können.From the EP 0 559 628 B1 a dryer for drying a fibrous web is known in which a flow cylinder is used in conjunction with a Anblasaube. This is provided with a nozzle arrangement, with the aid of which drying gas jets are applied to the outer surface of the web to be dried, while this is guided around the heated cylinder over a sector of about 270 ° or more. The jacket of the cylinder is provided with a system of ductwork into which a coolant can be directed from a coolant source. By the drying gas jets, water in the web is evaporated to the outside and removed through spaces in the Anblasaube. On the other hand, water condenses from the web on the cooled surface of the cylinder and is sucked through the perforation in the outer shell of the cylinder and a pressure prevailing in the interior of the cylinder vacuum. The entire interior of the cylinder is available to receive the condensate. As a result, the inner wall of the cylinder must have a certain minimum wall thickness in order to withstand the pressure loads at the cylinder diameters used can.

Ausführungen beheizbarer rotierbarer Zylinder in zweischaliger Bauweise mit einem von innen mit einem Heizfluid beaufschlagbaren Zylindermantel, wobei unterhalb der äußeren Oberfläche des Zylindermantels mindestens ein Kanal zur Durchleitung des Heizfluids ausgebildet ist, sind in einer Vielzahl von Ausführungen vorbekannt. Stellvertretend wird auf die Druckschriften US 4,758,310 , WO 02/095125 A , EP 0 903 438 A2 und US 4,955,268 verwiesen. Diese Ausführungen sind durch einen äußeren und einen inneren Zylindermantel charakterisiert, zwischen denen Kanäle entweder aufgrund der Ausführung der einzelnen Zylindermäntel in diese eingeformt oder über dazwischen angeordnete, sich in radialer Richtung erstreckende und in Längsrichtung des Zylinders verlaufende Stege gebildet werden, die entweder mit einem der Mäntel eine bauliche Einheit bilden und mit dem anderen über Befestigungselemente verbunden sind oder aber als separate Elemente ausgeführt sind und über Verbindungsmittel mit den beiden Zylindermänteln verbunden sind. Die Fertigung, insbesondere des äußeren Zylindermantels gestaltet sich dabei sehr aufwenig, insbesondere wenn die Heizfluid führenden Kanäle in diesen einzuarbeiten sind oder aber weitere Maßnahmen, wie Rippen zur Vergrößerung der wirksamen Fläche zur Wärmeübertragung, vorgesehen sind.Embodiments of heatable rotatable cylinder in two-shell construction with an acted upon from the inside with a heating fluid cylinder jacket, wherein below the outer surface of the cylinder jacket at least one channel is formed for the passage of the heating fluid, are already known in a variety of designs. Representative becomes on the pamphlets US 4,758,310 . WO 02/095125 A . EP 0 903 438 A2 and US 4,955,268 directed. These designs are characterized by an outer and an inner cylinder shell, between which channels either due to the execution of the individual cylinder jackets in this molded or arranged in between, extending in the radial direction and extending in the longitudinal direction of the cylinder webs are formed either with one of the coats a structural unit and connected to the other via fasteners or are designed as separate elements and via connecting means with the two cylinder jackets are connected. The production, in particular of the outer cylinder shell is very aufwenig, especially if the Heizfluid leading channels are incorporated in this or other measures, such as ribs to increase the effective area for heat transfer, are provided.

Eine Ausführung mit einteiligem inneren Zylindermantel und aus einzelnen gekrümmt ausgeführte und hohlzylindrische Segmente bildenden Deckblechen gebildetem äußeren Zylindermantel ist in der Druckschrift US 4,453,593 offenbart. Die Kanäle werden über am Aussenumfang des inneren Zylindermantels angeordnet und Stege bildende Vorsprünge und den äußeren Zylindermantel erzeugt. Die Deckbleche erstrecken sich dazu derart über einen Teilbereich des Zylindermantels in Umfangsrichtung, dass diese den Zwischenraum zwischen zwei in Umfangsrichtung benachbart angeordneten Stegen überdecken. Die Verbindung zwischen zwei derartigen Deckblechen und einem Steg erfolgt über eine Schweißverbindung. Die Schweißnaht ist daher auf die in unterschiedlichen Richtungen ausgerichteten Kräfte innerhalb der durch diese erzeugten Verbindungen auszulegen.An embodiment with a one-piece inner cylinder jacket and from individual curved executed and hollow cylindrical segments forming cover plates formed outer cylinder shell is in the document US 4,453,593 disclosed. The channels are arranged on the outer circumference of the inner cylinder jacket and webs forming projections and the outer cylinder shell generated. The cover plates extend in such a way over a portion of the cylinder jacket in the circumferential direction that they cover the space between two circumferentially adjacent webs arranged. The connection between two such cover plates and a web via a welded joint. The weld must therefore be designed for the forces oriented in different directions within the joints created by them.

Da die Stege wiederum selbst mit dem inneren Zylindermantel über Verbindungsmittel, insbesondere einen Stoffschluss verbunden sind, und diese die erforderliche Erstreckung der einzelnen Teilsegmente des äußeren Zylindermantels in Umfangsrichtung bestimmen, bedarf es einer sehr präzisen Positionierung dieser gegenüber dem inneren Zylindermantel. Der erforderliche Fertigungs- und Montageaufwand ist daher bei dieser Ausführung extrem hoch.Since the webs in turn are themselves connected to the inner cylinder jacket via connecting means, in particular a material connection, and these determine the required extent of the individual sub-segments of the outer cylinder jacket in the circumferential direction, it requires a very precise positioning of this relative to the inner cylinder jacket. The required manufacturing and assembly effort is therefore extremely high in this design.

Es ist die Aufgabe der Erfindung, die Trocknungsleistung eines beheizbaren Zylinders zu erhöhen.It is the object of the invention to increase the drying performance of a heatable cylinder.

Diese Aufgabe wird dadurch gelöst, dass unterhalb der äußeren Oberfläche des Zylindermantels mindestens ein Kanal zur Durchleitung des Heizfluids ausgebildet ist.This object is achieved in that at least one channel for the passage of the heating fluid is formed below the outer surface of the cylinder jacket.

Durch die Erfindung kann das Heizfluid sehr nahe an die äußere Oberfläche des beheizbaren Zylinders gebracht werden. Das Temperaturgefälle ist dadurch geringer als bei den bekannten Vorrichtungen der genannten Art und entsprechend ist die Trocknungsleistung erhöht.By the invention, the heating fluid can be brought very close to the outer surface of the heated cylinder. The temperature gradient is thereby lower than in the known devices of the type mentioned and, accordingly, the drying performance is increased.

Nach einer besonders bevorzugten Ausgestaltung der Erfindung ist zur Bildung des mindestens einen Kanals ein weiterer Zylindermantel innerhalb des Zylindermantels angeordnet, der zum äußeren Zylindermantel beabstandet ist. Dies ist konstruktiv gut lösbar und hat den Vorteil, dass die gesamte Innenseite des äußeren Zylindermantels mit Heizfluid beaufschlagbar ist.According to a particularly preferred embodiment of the invention, a further cylinder jacket is arranged within the cylinder jacket, which is spaced from the outer cylinder shell to form the at least one channel. This is structurally well solvable and has the advantage that the entire inner side of the outer cylinder shell can be acted upon with heating fluid.

Nach einer weiteren Ausgestaltung der Erfindung stützt sich der äußere Zylindermantel auf dem inneren Zylindermantel ab. Die Wandstärke des äußeren Zylindermantels kann dadurch gering gehalten werden, da der innere Zylindermantel als Tragzylinder wirkt. Die Trocknungsleistung kann dadurch noch weiter erhöht werden.According to a further embodiment of the invention, the outer cylinder shell is supported on the inner cylinder shell. The wall thickness of the outer cylinder shell can be kept low because the inner cylinder shell acts as a support cylinder. The drying performance can be increased even further.

Zur Abstützung des äußeren Zylindermantels auf dem inneren Zylindermantel können insbesondere Stege, Stäbe, Stifte, Nieten, Bolzen, Schrauben und/oder andere Verbindungsmittel vorgesehen sein. Wichtig ist, dass die Verbindungsmittel über die Oberfläche beider Zylindermäntel verteilt angeordnet sind, um eine gleichmäßige Abstützung zu gewährleisten.In particular, webs, rods, pins, rivets, bolts, screws and / or other connecting means may be provided for supporting the outer cylinder jacket on the inner cylinder jacket. It is important that the connecting means are distributed over the surface of both cylinder jackets to ensure a uniform support.

Die Stege oder sonstige Verbindungselemente können axial, in Umfangsrichtung und/oder in einer dazwischen liegenden Richtung verlaufen. In allen Fällen kann eine gute Abstützung erreicht werden.The webs or other connecting elements can extend axially, in the circumferential direction and / or in an intermediate direction. In all cases good support can be achieved.

Insbesondere bei in Umfangsrichtung verlaufenden Stegen ist es vorteilhaft, wenn diese zumindest teilweise mit Durchtrittsöffnungen für das Heizfluid versehen sind. Das Heizfluid kann dann nicht nur in Umfangsrichtung sondern auch in Längsrichtung des Trockenzylinders fließen.In particular, in the case of webs running in the circumferential direction, it is advantageous if they are provided at least partially with passage openings for the heating fluid. The heating fluid can then flow not only in the circumferential direction but also in the longitudinal direction of the drying cylinder.

Innerer Mantel und äußerer Mantel des Trockenzylinders können aus gleichem oder aus unterschiedlichem Werkstoff bestehen. Vorteilhaft ist es in jedem Fall, wenn es sich um metallischen Werkstoff handelt, da dann eine gute Wärmeleitung sowie eine ausreichende Stabilität gewährleistet sind.Inner jacket and outer jacket of the drying cylinder can be made of the same or different material. It is advantageous in In any case, if it is a metallic material, because then a good heat conduction and a sufficient stability are guaranteed.

Als Material insbesondere für den äußeren Mantel wird vorzugsweise Material mit hoher Wärmeleitfähigkeit verwendet. Es kommt insbesondere Stahl, vorzugsweise Kesselstahl, Kupfer, Aluminium oder Bronze in Betracht. Damit kann eine gute Wärmeübertragung auf die Faserstoffbahn gewährleistet werden.As a material, in particular for the outer jacket material is preferably used with high thermal conductivity. It is especially steel, preferably boiler steel, copper, aluminum or bronze into consideration. Thus, a good heat transfer to the fibrous web can be ensured.

Konstruktiv vorteilhaft ist die Ausbildung des inneren Zylinders als dickwandiges Rohr. Damit ist auch eine gute Trageigenschaft gewährleistet.Constructively advantageous is the formation of the inner cylinder as a thick-walled tube. This ensures a good carrying quality.

Der innere Zylinder kann auch aus zwei oder mehr einzelnen Schalen bestehen. Das Wärmeausdehnungsverhalten sowie die Tragfähigkeit können dadurch verbessert werden.The inner cylinder may also consist of two or more individual shells. The thermal expansion behavior and the load capacity can be improved thereby.

Der innere Zylinder kann aber auch als Stabwerk oder Spanten-Rippen-Konstruktion ausgebildet sein. In bestimmten Anwendungsfällen kann auch dies vorteilhaft sein.The inner cylinder can also be designed as a truss or frame rib construction. In certain applications, this may also be advantageous.

Nach einer weiteren Ausgestaltung der Erfindung ist die Innenseite des äußeren Zylindermantels mit Erhebungen versehen. Hierdurch wird das sich auf der Innenseite des äußeren Zylindermantels ansammelnde Kondensat in Turbulenzen versetzt, wodurch sich die Wärmeübertragung verbessert. Das sich ansammelnde Kondensat wirkt nämlich wärmeisolierend und erhöht das Temperaturgefälle zur Zylinderoberfläche.According to a further embodiment of the invention, the inside of the outer cylinder jacket is provided with elevations. As a result, the accumulating on the inside of the outer cylinder shell condensate is added to turbulence, whereby the heat transfer improves. The accumulating condensate acts namely heat-insulating and increases the temperature gradient to the cylinder surface.

Nach einer bevorzugten Ausgestaltung der Erfindung ist die Innenseite der äußeren Zylindermantelfläche mit Rippen und/oder Noppen und/oder einer Gitter- oder Wabenstruktur ausgebildet. Damit kann eine gute Aufwirbelung des Kondensats erreicht werden.According to a preferred embodiment of the invention, the inside of the outer cylinder jacket surface with ribs and / or nubs and / or a Grid or honeycomb structure formed. Thus, a good fluidization of the condensate can be achieved.

Die Höhe der Erhebungen auf der Innenseite des äußeren Zylindermantels ist bevorzugt so gewählt, dass sie aus dem sich im Betrieb bildenden Fluidkondensat herausragt. Auf diese Weise haben die Erhebungen direkten Kontakt zum Heizfluid, wodurch die Wärme besser auf die äußere Oberfläche des Trockenzylinders geleitet werden kann. Darüber hinaus wirkt sich die Vergrößerung der Oberfläche durch die Erhebungen positiv auf die Wärmeübertragung aus. Daher sind auch Erhebungen mit geringerer Höhe als die Kondensathöhe vorteilhaft.The height of the elevations on the inside of the outer cylinder jacket is preferably selected so that it protrudes from the fluid condensate forming during operation. In this way, the elevations have direct contact with the heating fluid, whereby the heat can be better directed to the outer surface of the drying cylinder. In addition, the enlargement of the surface by the surveys has a positive effect on the heat transfer. Therefore, elevations with a lower height than the condensate level are also advantageous.

Die Erhebungen verlaufen bevorzugt in Zylinderlängsrichtung und/oder längs einer Schraubenlinie. Durch eine Schraubenlinie kann eine besondere Förderwirkung zur Kondensatabfuhr erreicht werden.The elevations preferably extend in the cylinder longitudinal direction and / or along a helix. By a helical line, a special conveying effect for condensate removal can be achieved.

Zur Ableitung von sich im Betrieb bildenden Kondensat sind nach einer Ausgestaltung der Erfindung ein oder mehrere Siphons vorgesehen. Diese können mit dem Trockenzylinder mitdrehend oder feststehend ausgebildet sein. Die sich ansammelnde Kondensatmenge auf der Innenseite des äußeren Zylindermantels kann dadurch verringert werden.For the derivation of condensate forming during operation, one or more siphons are provided according to an embodiment of the invention. These can be co-rotating or stationary with the drying cylinder. The accumulating condensate on the inside of the outer cylinder shell can be reduced.

Die äußere Oberfläche des Trockenzylinders kann mit einer Beschichtung oder Abdeckung versehen sein. Diese dient insbesondere zum Korrosions- oder Abrasionsschutz oder dazu, die Oberfläche zu verbessern, beispielsweise um das Ankleben von Papier zu vermeiden.The outer surface of the drying cylinder may be provided with a coating or cover. This is used in particular for corrosion or abrasion protection or to improve the surface, for example, to avoid the sticking of paper.

Gemäß der Erfindung sind als Verbindungselemente zwischen innerem und äußeren Zylindermantel Stegbleche vorgesehen, die mit dem inneren Zylindermantel verbunden sind. Der äußere Zylindermantel wird durch Deckbleche gebildet.According to the invention, web plates are provided as connecting elements between the inner and outer cylinder jacket, which are connected to the inner cylinder jacket. The outer cylinder jacket is formed by cover plates.

Die Steg- und Deckbleche sind zu Profilen kombiniert, vorzugsweise U- oder T-förmig.The web and cover plates are combined into profiles, preferably U-shaped or T-shaped.

Nach noch einer speziellen Ausgestaltung der Erfindung sind der Außenmantel und die Verbindungselemente in einem Stück gefertigt, insbesondere durch Schweißen, Fräsen aus einem Rohr, Gießen oder mittels anderer Fertigungsverfahren.According to yet a special embodiment of the invention, the outer jacket and the connecting elements are manufactured in one piece, in particular by welding, milling from a tube, casting or by other manufacturing methods.

Der äußere Zylindermantel und der innere Zylindermantel können vorteilhafterweise durch Presssitz miteinander verbunden werden. Eine andere Möglichkeit besteht in einer Schraubverbindung. Vorteilhaft ist außerdem ein Kegelsitz oder eine Formschlussverbindung, insbesondere L-, T- oder Schwalbenschwanzverbindung. Um Spielfreiheit in der Verbindung herzustellen, kann zusätzlich ein Lötmaterial angebracht werden, das bei anschließender Erwärmung des Zylinders schmilzt und danach wieder aushärtet. Es können aber auch die Toleranzen zu gewählt werden, dass kein Spiel herrscht.The outer cylinder jacket and the inner cylinder jacket can be advantageously connected to each other by press fitting. Another possibility is a screw connection. Also advantageous is a conical seat or a positive connection, in particular L, T or dovetail connection. In order to produce backlash in the connection, a soldering material can be additionally attached, which melts in subsequent heating of the cylinder and then cured again. But it can also be chosen to the tolerances that there is no game.

Andere Möglichkeiten der Verbindung bestehen in Klemmelementen, einer Selbsthemmung oder einer Rastverbindung. Auch Kombinationen aller genannten Verbindungen sind möglich, beispielsweise eine T-Nut-Verbindung mit kegeligem Sitz oder eine T-Nut-Verbindung mit Schrauben.Other ways of connecting exist in clamping elements, a self-locking or locking connection. Combinations of all mentioned compounds are possible, for example a T-slot connection with a conical seat or a T-slot connection with screws.

Nach einer weiteren Ausgestaltung der Erfindung ist der innere Zylindermantel aus einzelnen Blechen gebildet, die in geeigneter Weise, beispielsweise Schweißen, mit den Verbindungselementen und untereinander verbunden sind. Es können auch sowohl der innere Zylindermantel als auch der äußere Zylindermantel in dieser Weise gefertigt sein.According to a further embodiment of the invention, the inner cylinder jacket is formed from individual sheets, which in a suitable manner, for example welding, with the connecting elements and interconnected are. It can also be made in this way, both the inner cylinder shell and the outer cylinder shell.

Nach einer weiteren speziellen Ausgestaltung der Erfindung sind als Verbindungselemente zwischen innerem und äußeren Zylindermantel Bolzen vorgesehen, die in Löcher im äußeren Zylindermantel eingebracht und mit dem inneren Zylindermantel verbunden sind, beispielsweise durch Reib- oder Widerstandspressschweißen oder durch Einschrauben. Die Verbindung von Bolzen und äußerem Zylindermantel in den Löchern erfolgt bevorzugt anschließend, beispielsweise durch Verschweißen. Anstelle von in Löcher des äußeren Zylindermantels eingebrachten Bolzen können auch in Löcher des inneren Zylindermantels eingebrachte Bolzen vorgesehen sein, die dann mit dem äußeren Zylindermantel verbunden sind.According to a further specific embodiment of the invention bolts are provided as connecting elements between the inner and outer cylinder jacket, which are introduced into holes in the outer cylinder shell and connected to the inner cylinder jacket, for example by friction or resistance pressure welding or by screwing. The connection of bolts and outer cylinder jacket in the holes is preferably then, for example by welding. Instead of bolts introduced into holes of the outer cylinder jacket, bolts introduced into holes of the inner cylinder jacket can also be provided, which are then connected to the outer cylinder jacket.

Der innere Zylindermantel können jeweils nach einer weiteren Ausgestaltung der Erfindung über ihre gesamte Länge in einem Stück gefertigt sein, beispielsweise durch Gießen.According to a further embodiment of the invention, the inner cylinder jacket can be manufactured in one piece over its entire length, for example by casting.

Nach noch einer Ausgestaltung der Erfindung sind innerer Zylindermantel und Verbindungselemente als ein Teil gefertigt, an welchem dann die Außenschale mit einem geeigneten Verfahren befestigt wird.According to yet another embodiment of the invention, the inner cylinder jacket and connecting elements are manufactured as one part, to which the outer shell is then fastened by a suitable method.

Eine vorteilhafte Verbindungsart ergibt sich, wenn die Stege zwischen dem inneren Zylindermantel und dem äußeren Zylindermantel in der Höhe schräg geteilt sind. Das heißt, ein Teilsteg ist jeweils auf dem inneren Zylindermantel und ein Teilsteg auf dem äußeren Zylindermantel vorgesehen. Durch Verdrehen von innerem und äußerem Zylindermantel gegeneinander werden diese Stegteile miteinander in Verbindung gebracht und eine kraftschlüssige Verbindung hergestellt.An advantageous type of connection results when the webs between the inner cylinder shell and the outer cylinder shell are divided in height obliquely. That is, a partial web is respectively provided on the inner cylinder shell and a partial web on the outer cylinder shell. By rotating inner and outer cylinder jacket against each other, these web parts are brought together and made a positive connection.

Zur Zu- und Abfuhr des Heizfluids sind bevorzugt entsprechende Kanäle in der Achse des Trockenzylinders vorgesehen. Der hinführende Kanal und der rückführende Kanal können dabei ineinander geschachtelt sein. Dies ist platzsparend und vereinfacht die Konstruktion.For the supply and removal of the heating fluid preferably corresponding channels are provided in the axis of the drying cylinder. The leading channel and the returning channel can be nested inside each other. This saves space and simplifies the construction.

Über radiale Kanäle, insbesondere zumindest im Deckel auf der Zufuhrseite, kann das Heizfluid auf den Hohlraum zwischen innerem und äußerem Zylindermantel verteilt werden. Dies ist insbesondere dann vorteilhaft, wenn über den Umfang betrachtet viele Einzelkanäle nebeneinander angeordnet sind, beispielsweise bei in Längsrichtung des Trockenzylinders durchgehenden Stegen zwischen innerem und äußerem Zylindermantel oder bei einem gebohrten einzigen Mantel.Via radial channels, in particular at least in the cover on the supply side, the heating fluid can be distributed to the cavity between the inner and outer cylinder jacket. This is particularly advantageous when viewed over the circumference many individual channels are arranged side by side, for example, in the longitudinal direction of the drying cylinder continuous webs between the inner and outer cylinder jacket or a single bore drilled coat.

Vorteilhaft kann es außerdem sein, die äußere Mantelfläche abzudrehen. Dadurch kann eine glatte Oberfläche erreicht werden.It may also be advantageous to turn off the outer lateral surface. This allows a smooth surface to be achieved.

Die Erhebungen auf der Innenseite des äußeren Zylindermantels können gefräst, gezogen, gepresst, gewalzt oder gegossen sein. Auch andere Herstellungsarten sind möglich.The elevations on the inside of the outer cylinder shell can be milled, drawn, pressed, rolled or cast. Other types of production are possible.

Die Stege, Bleche oder sonstige Verbindungselemente zwischen innerem und äußeren Zylindermantel könne spanend, ur- oder umformtechnisch hergestellt sein. Auch eine Kombination dieser Verfahren ist möglich.The webs, sheets or other connecting elements between the inner and outer cylinder jacket can be made by machining, ur- or forming technology. A combination of these methods is possible.

Eine Vorrichtung der genannten Art wird bevorzugt zur Herstellung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn verwendet. Dabei kann ein Trockenzylinder der genannten Art oder mehrere derartige Trockenzylinder verwendet werden. Ein Trockenzylinder gemäß der vorliegenden Erfindung kann auch mit herkömmlichen Trockenzylindern kombiniert werden.A device of the type mentioned is preferably used for producing a fibrous web, in particular paper or board web. In this case, a drying cylinder of the type mentioned or several such drying cylinders can be used. A drying cylinder according to the present invention may also be combined with conventional drying cylinders.

Die Faserstoffbahn kann bei der Herstellung von den Trockenzylindern jeweils auf der gleichen Seite berührt werden. Es ist aber auch eine beidseitige Berührung möglich. Je nach Anwendungsfall ist die eine oder andere Variante vorteilhaft.The fibrous web can be contacted in the manufacture of the drying cylinders each on the same side. But it is also a two-sided contact possible. Depending on the application, one or the other variant is advantageous.

Zur Bahnführung können alle bekannten Hilfseinrichtungen verwendet werden, beispielsweise Saug- oder Blaskasten, besaugte oder unbesaugte Walze, Airfoil oder Trockensieb.For web guiding, all known ancillary equipment can be used, for example suction or blow box, suctioned or uninsprayed roller, airfoil or dryer fabric.

Als konventionelle Trockenverfahren kommen insbesondere Zylindertrocknung, Boost-Dryer-Verfahren, Condebelt-Verfahren, Yankee-Zylinder und Hi-Dryer in Betracht.Cylinder drying, Boost-Dryer processes, Condebelt processes, Yankee cylinders and Hi-dryers are particularly suitable as conventional drying processes.

Zusammen mit der Faserstoffbahn und gegebenenfalls einem Filz kann auch ein Metallband über den Trockenzylinder geführt werden. Dieser ist bevorzugt gekühlt und steht unter Spannung. Dadurch kann das Temperaturgefälle über die Faserstoffbahn erhöht und damit eine schnelle Abfuhr der Feuchtigkeit erreicht werden.Together with the fibrous web and optionally a felt, a metal band can also be passed over the drying cylinder. This is preferably cooled and is under tension. As a result, the temperature gradient can be increased over the fibrous web and thus a rapid removal of moisture can be achieved.

Durch das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung kann die Trockenleistung erhöht werden. Dadurch kann ein fertig trocknendes Papier bei geringerer Verweilzeit erreicht werden. Dies kann zum einen dadurch genutzt werden, dass gegenüber einer Trockenpartie nach dem Stand der Technik weniger Platz benötigt wird, woraus sich Einsparungen beim Grundpreis, bei den Baukosten für die Halle, der Maschinenbestuhlung und die Dunstabzugshaube sowie bei den Betriebskosten für Antriebe und Haubenbelüftung ergeben. Zum anderen kann dies dadurch genutzt werden, dass bei gegebenen Platzverhältnissen, beispielsweise Papiermaschinenumbauten, bei gleicher Länge der Trockenpartie eine Geschwindigkeitssteigerung erreicht wird. Die Papiermaschine kann dadurch wirtschaftlicher betrieben werden. Bei gleicher Trocknungsleistung kann außerdem der Dampfdruck gesenkt werden. Der Differenzdampfdruck könnte beispielsweise zur Stromerzeugung genutzt werden, oder die Energie zur Dampferzeugung kann minimiert werden.By the method and apparatus of the invention, the drying capacity can be increased. This allows a finished drying paper can be achieved with less residence time. This can be used on the one hand, that compared to a dryer section according to the prior art, less space is needed, resulting in savings in the base price, the construction costs for the hall, machine seating and the hood and the operating costs for drives and hood ventilation. On the other hand, this can be used by increasing the speed of the dryer section given the same space conditions, for example paper machine conversions. The paper machine can thereby be operated more economically. In addition, with the same drying performance, the vapor pressure can be lowered. The differential vapor pressure could be used, for example, to generate electricity, or the energy for steam generation can be minimized.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden nachfolgend beschrieben. Es zeigen, jeweils in schematischer Darstellung,

Fig. 1
einen Längsschnitt durch einen Trockenzylinder einer erfin- dungsgemäßen Vorrichtung,
Fig. 2
eine Teildraufsicht auf die Stirnseite des Trockenzylinders von Fig. 1,
Fig. 3
einen Teilquerschnitt durch einen Trockenzylinder einer erfin- dungsgemäßen Vorrichtung,
Fig. 4
eine Variante zu Fig. 3,
Fig. 5
eine weitere Variante zu Fig. 3,
Fig. 6
einen vereinfachten Längsschnitt eines weiteren Trockenzylin- ders einer erfindungsgemäßen Vorrichtung.
Embodiments of the invention are illustrated in the drawings and will be described below. They show, in each case in a schematic representation,
Fig. 1
a longitudinal section through a drying cylinder of an inventive device,
Fig. 2
a partial plan view of the front side of the drying cylinder of Fig. 1 .
Fig. 3
a partial cross section through a drying cylinder of an inventive device,
Fig. 4
a variant too Fig. 3 .
Fig. 5
another variant too Fig. 3 .
Fig. 6
a simplified longitudinal section of another Trockenzylin- ders a device according to the invention.

Fig. 1 zeigt einen Trockenzylinder in der Trockenpartie einer Papiermaschine. Der Trockenzylinder umfasst einen äußeren Zylindermantel 1 und einen konzentrisch darin angeordneten inneren Zylindermantel 2. Der innere Zylindermantel 2 ist über Schrauben 3 an zwei stirnseitigen Deckeln 4 befestigt, die scheibenförmig ausgebildet sind und jeweils eine Lagerachse 5, 6 aufweisen. Auf der linken Seite in Fig. 1 befindet sich Triebseite, auf der rechten Seite die Führerseite des Trockenzylinders. Fig. 1 shows a drying cylinder in the dryer section of a paper machine. The drying cylinder comprises an outer cylinder jacket 1 and an inner cylinder jacket 2 arranged concentrically therein. The inner cylinder jacket 2 is fastened by screws 3 to two end caps 4, which are disc-shaped and each have a bearing axis 5, 6. On the left in Fig. 1 is drive side, on the right side of the leader of the drying cylinder.

Der äußere Zylindermantel 1 weist eine äußere Oberfläche 7 auf, über welche eine zu trocknende Papierbahn geführt wird. Die äußere Oberfläche 7 des äußeren Zylindermantels 1 ist bündig mit den Umfangsflächen 8 der beiden Deckel 4 ausgeführt. Dadurch ist eine durchgehende Anlagefläche für die Papierbahn geschaffen.The outer cylinder shell 1 has an outer surface 7, over which a paper web to be dried is guided. The outer surface 7 of the outer cylinder jacket 1 is flush with the peripheral surfaces 8 of the two covers 4 executed. This creates a continuous contact surface for the paper web.

Der äußere Zylindermantel 1 weist eine Dicke d1 auf, die geringer ist als die Dicke d2 des inneren Zylindermantels 2. Die innere Mantelfläche 9 des äußeren Zylindermantels 1 weist zu der äußeren Mantelfläche 10 des inneren Zylindermantels 2 einen Abstand auf, so dass zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2 ein ringsförmiger Hohlraum 11 gebildet ist. Dieser Ringraum 11 steht auf beiden Stirnseiten der beiden Zylindermäntel 1, 2 über hier nicht dargestellte Kanäle in den Deckeln 4 mit radialen Kanälen 12, 13 in den beiden Achsen 5, 6 der Deckel 4 in Verbindung. Die radialen Kanäle 12 der Achse 5 des führerseitigen Deckels 4 stehen ihrerseits mit einem axialen Kanal 14 in Verbindung, der zentral in der Achse 5 des führerseitigen Deckels 4 vorgesehen ist und in einem Anschlussende 15 mündet. Ebenso stehen die radialen Kanäle 13 der Achse 6 des triebseitigen Deckels 4 mit einem axialen Kanal 16 in Verbindung. Dieser Kanal 16 ist ausgehend vom triebseitigen Deckel 4 konzentrisch zur Drehachse I des Trockenzylinders zentral durch die beiden Zylindermäntel 1, 2 und die Achse 5 des führerseitigen Deckels 4 geführt und mündet ebenfalls in einem Anschlussende 17. Dabei durchdringt der Kanal 16 den Kanal 14 konzentrisch, so dass der Kanal 14 einen ringförmigen Querschnitt aufweist.The outer cylinder jacket 1 has a thickness d 1 which is smaller than the thickness d 2 of the inner cylinder jacket 2. The inner circumferential surface 9 of the outer cylinder jacket 1 faces the outer jacket surface 10 of the inner cylinder jacket 1 Cylinder jacket 2 at a distance, so that between the outer cylinder shell 1 and inner cylinder shell 2, a ring-shaped cavity 11 is formed. This annulus 11 is on both ends of the two cylinder mantles 1, 2 via channels not shown here in the lids 4 with radial channels 12, 13 in the two axes 5, 6 of the cover 4 in connection. The radial channels 12 of the axis 5 of the driver side cover 4 are in turn connected to an axial channel 14 in connection, which is centrally provided in the axis 5 of the driver side cover 4 and opens into a connection end 15. Likewise, the radial channels 13 of the axis 6 of the drive-side cover 4 with an axial channel 16 in connection. This channel 16 is guided starting from the drive-side cover 4 concentric to the axis of rotation I of the drying cylinder centrally through the two cylinder shells 1, 2 and the axis 5 of the driver-side cover 4 and also opens into a connection end 17. The channel 16 penetrates the channel 14 concentrically, so that the channel 14 has an annular cross-section.

Durch die beschriebene Konstruktion ergibt sich ein Kanalsystem, das eine Zirkulation von Heizfluid durch den Hohlraum 11 zwischen dem äußeren Zylindermantel 1 und dem inneren Zylindermantel 2 ermöglicht. Hierfür wird beispielsweise Heizfluid über das Anschlussende 15 in den Ringkanal 14 zugeführt. Von dort gelangt das Heizfluid über die radialen Kanäle 12 in die nicht dargestellten Kanäle in dem führerseitigen Deckel 4 und von diesen in den Hohlraum 11 zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2. Das Heizmedium strömt dann von der Führerseite durch den Hohlraum 11 auf die Triebseite und gelangt dort über die nicht dargestellten Kanäle in dem triebseitigen Deckel 4 in die radialen Kanäle 13 der triebseitigen Achse 6. Von dort wiederum fließt das Heizfluid über den zentralen Kanal 16 zurück zu dessen Anschlussende 17.The described construction results in a channel system which allows a circulation of heating fluid through the cavity 11 between the outer cylinder shell 1 and the inner cylinder shell 2. For this purpose, for example, heating fluid is supplied via the connection end 15 in the annular channel 14. From there, the heating fluid passes through the radial channels 12 in the channels, not shown, in the driver side cover 4 and of these in the cavity 11 between the outer cylinder shell 1 and inner cylinder shell 2. The heating medium then flows from the leader side through the cavity 11 on the drive side and passes there via the channels, not shown in the drive-side cover 4 in the radial channels 13 of the drive-side axis 6. From there, in turn, the heating fluid flows through the central channel 16 back to the terminal end 17th

Der äußere Zylindermantel 1 weist auf beiden Stirnseiten jeweils verjüngte Abschnitte 18 auf, mit denen der äußere Zylindermantel 11 jeweils auf einem entsprechenden Sitz 19 auf den Umfangsseiten der Deckel 4 aufliegt. Dadurch ist der äußere Zylindermantel 1 auf den beiden Deckeln 4 abgestützt. Die Hauptabstützung des äußeren Zylindermantels 1 erfolgt jedoch über seine Länge mittels Verbindungselementen 20, wie sie beispielhaft in Fig. 2 dargestellt sind und die über die Umfangsflächen des äußeren Zylindermantels 1 und des inneren Zylindermantels 2 verteilt angeordnet sind. Fig. 2 zeigt außerdem noch einen Siphon 21, der zur Abfuhr von Kondensat am stirnseitigen Ende des Hohlraums 11 vorgesehen ist. Derartige Siphons 21 können sowohl auf der Triebseite als auch auf der Führerseite vorgesehen sein und entweder mitdrehend oder feststehend ausgebildet sein. In Umfangsrichtung können auch mehrere derartiger Siphons vorgesehen sein.The outer cylinder shell 1 has on both end sides in each case tapered portions 18, with which the outer cylinder shell 11 each rests on a corresponding seat 19 on the peripheral sides of the cover 4. As a result, the outer cylinder jacket 1 is supported on the two covers 4. However, the main support of the outer cylinder shell 1 takes place over its length by means of connecting elements 20, as exemplified in Fig. 2 are shown and which are arranged distributed over the peripheral surfaces of the outer cylinder shell 1 and the inner cylinder shell 2. Fig. 2 also shows a siphon 21, which is provided for the removal of condensate at the front end of the cavity 11. Such siphons 21 may be provided both on the drive side and on the driver's side and be formed either co-rotating or stationary. In the circumferential direction and several such siphons can be provided.

Verschiedene Varianten der Verbindungsmittel 20 zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2 sind in den Fig. 3 bis 5 dargestellt und werden nachfolgend beschrieben.Different variants of the connecting means 20 between the outer cylinder shell 1 and inner cylinder shell 2 are in the Fig. 3 to 5 and are described below.

Fig. 3 bis 5 zeigen einen Umfangsabschnitt eines erfindungsgemäßen Trockenzylinders mit einem äußeren Zylindermantel 1 geringer Dicke d1 und einem inneren Zylindermantel 2 demgegenüber größerer Dicke d2. Zwischen dem äußeren Zylindermantel 1 und dem inneren Zylindermantel 2 ist ein Hohlraum 11 zum Durchleiten eines Heizfluids vorhanden. Fig. 3 to 5 show a peripheral portion of a drying cylinder according to the invention having an outer cylinder shell 1 of small thickness d 1 and an inner cylinder jacket 2. In contrast, a larger thickness d. 2 Between the outer cylinder shell 1 and the inner cylinder shell 2, a cavity 11 for passing a heating fluid is present.

Bei A1 in Fig. 3 ist eine Schraubverbindung zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2 dargestellt. Der innere Zylindermantel 2 weist hierfür Löcher 22 auf, durch welche Schrauben 23 hindurchgeführt sind. Gegenüberliegend zu den Löchern 22 im inneren Zylindermantel 2 weist der äußere Zylindermantel 1 radial nach innen weisende Vorsprünge 24 auf, in welchen Gewindelöcher 25 vorgesehen sind, in welche die Schrauben 23 einschraubbar sind. Über die radialen Vorsprünge 24 stützt sich der äußere Zylindermantel 1 auf dem inneren Zylindermantel 2 ab, und die Schrauben 23 legen die beiden Zylindermäntel 1, 2 gegeneinander fest. Ein radialer Vorsprung kann jeweils nur bei den Schrauben 23 vorgesehen sein oder sich durchgehend in Axialrichtung des Trockenzylinders oder in einer anderen Richtung erstrecken.At A1 in Fig. 3 is a screw connection between the outer cylinder shell 1 and inner cylinder shell 2 is shown. The inner cylinder shell 2 has for this purpose holes 22 through which screws 23 are passed. Opposite to the holes 22 in the inner cylinder shell 2, the outer cylinder shell 1 radially inwardly facing projections 24, in which threaded holes 25 are provided, in which the screws 23 are screwed. About the radial projections 24, the outer cylinder shell 1 is supported on the inner cylinder shell 2, and the screws 23 set the two cylinder mantles 1, 2 against each other. A radial projection may be provided only with the screws 23 or may extend continuously in the axial direction of the drying cylinder or in another direction.

Bei A2 ist eine ähnliche Verbindung zwischen innerem Zylindermantel 2 und äußerem Zylindermantel 1 dargestellt. Der einzige Unterschied besteht darin, dass hier dem radialen Vorsprung 24 gegenüberliegend jeweils ein tangential angefräster Sitz 26 auf der äußeren Umfangsfläche 10 des inneren Zylindermantels 2 vorgesehen ist. Hierdurch kann eine verbesserte Abstützung erreicht werden.At A2, a similar connection between the inner cylinder shell 2 and the outer cylinder shell 1 is shown. The only difference is that in each case a tangentially milled seat 26 is provided on the outer circumferential surface 10 of the inner cylinder jacket 2 opposite the radial projection 24. As a result, improved support can be achieved.

Bei A3 ist eine Verbindung dargestellt, die mit der Verbindung von A2 weitgehend übereinstimmt. Der einzige Unterschied besteht darin, dass hier der Durchmesser der Schraublöcher 22 und der Schrauben 23 gegenüber den entsprechenden Durchmessern bei A2 geringer ist. Beispielsweise können bei A2 Schrauben der Größe M10 und bei A3 Schrauben der Größe M8 verwendet werden. Die kleineren Schrauben sparen gegenüber den größeren Schrauben Gewicht.At A3, a connection is shown which largely matches the connection of A2. The only difference is that here the diameter of the screw holes 22 and the screws 23 is smaller than the corresponding diameters at A2. For example, M10 screws can be used on A2 and M8 screws on A3. The smaller screws save weight compared to larger screws.

Eine weitere Variante der Verbindung von A3 ist bei A4 dargestellt. Der Unterschied besteht darin, dass hier der Sitz 26 nicht tangential sondern unter einem Winkel von 2° zur Tangentialrichtung angefräst ist. Die Anfräsung dient dazu, den äußeren Zylindermantel 1 gegenüber dem inneren Zylindermantel 2 zu verklemmen. Hierfür wird der äußere Zylindermantel nach dem Aufführen auf den inneren Zylindermantel 2 in Richtung auf den ansteigenden Sitz 26, das heißt, in Fig. 3 nach rechts um die Achse I des Trockenzylinders verdreht.Another variant of the connection of A3 is shown at A4. The difference is that here the seat 26 is not milled tangentially but at an angle of 2 ° to the tangential direction. The milled cut serves to clamp the outer cylinder jacket 1 with respect to the inner cylinder jacket 2. For this purpose, the outer cylinder jacket is after being applied to the inner cylinder shell 2 in the direction of the rising Seat 26, that is, in Fig. 3 turned to the right about the axis I of the drying cylinder.

Eine noch stärkere Verklemmung ist bei der bei A5 dargestellten Verbindung realisiert. Hier beträgt der Winkel der Anfräsung gegenüber der Tangentialrichtung 5°. Im Übrigen stimmt diese Verbindung mit der Verbindung von A4 überein.An even stronger jamming is realized in the connection shown at A5. Here, the angle of the cut against the tangential direction is 5 °. Incidentally, this connection is the same as the A4 connection.

Bei der bei A6 dargestellten Variante ist wiederum ein unter 5° gegenüber der Horizontalrichtung angefräster Sitz 26 vorhanden. Der radiale Vorsprung 24 des äußeren Zylindermantels 1 ist jedoch nicht gerade ausgeführt wie bei den zuvor beschriebenen Varianten sondern weist L-Form auf. Der Fuß 27 des L-förmigen Vorsprungs 24 stützt sich dabei auf dem angefrästen Sitz 26 ab. Die Abstützung wird dadurch noch stabiler.In the variant shown at A6, in turn, a seat 26 milled at 5 ° with respect to the horizontal direction is present. However, the radial projection 24 of the outer cylinder shell 1 is not straight executed as in the variants described above but has L-shape. The foot 27 of the L-shaped projection 24 is supported on the milled seat 26 from. The support becomes even more stable.

Bei A7 ist dargestellt, dass ein L-förmiger Vorsprung 24 auch mit einem unter 0° angefrästen Sitz 26 oder einem unter 10° angefrästen Sitz 26 kombiniert werden kann.At A7 it is shown that an L-shaped projection 24 can also be combined with a seat 26 milled at 0 ° or a seat 26 milled at 10 °.

Schließlich ist in Fig. 3 dargestellt, dass der äußere Zylindermantel 1 auf seiner Innenumfangsfläche 9 mit Erhebungen 28 versehen sein kann. Diese dienen dazu, ein sich ansammelndes Kondensat in Turbulenzen zu versetzen, um die Wärmeleitung zur äußeren Oberfläche 7 des äußeren Zylindermantels 1 zu verbessern. Neben der dargestellten Form sind auch andere Formen möglich. Die Höhe der Erhebungen 28 ist bevorzugt jeweils so gewählt, dass sie zumindest ein gewisses Stück aus dem Kondensat herausragen, damit sie direkt von dem Heizmedium beaufschlagt werden und so eine gute zusätzliche Wärmeleitung zur äußeren Oberfläche 7 des äußeren Zylindermantels 1 bewirken.Finally, in Fig. 3 illustrated that the outer cylinder shell 1 may be provided on its inner circumferential surface 9 with elevations 28. These are used to put a condensate accumulating in turbulence in order to improve the heat conduction to the outer surface 7 of the outer cylinder shell 1. In addition to the shape shown, other shapes are possible. The height of the elevations 28 is preferably each chosen so that they protrude at least a certain extent from the condensate so that they are acted upon directly by the heating medium and thus cause a good additional heat conduction to the outer surface 7 of the outer cylinder shell 1.

Fig. 4 zeigt verschiedene Varianten einer Formschlussverbindung zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2. Wie bei B1 dargestellt, kann hierfür der äußere Zylindermantel 1 auf seiner Mantelinnenseite 9 mit sich in Axialrichtung oder einer anderen Richtung erstreckenden Vorsprüngen 29 versehen sein, in denen zum inneren Zylindermantel 2 hin offene, T-förmige Nuten 30 vorgesehen sind. Entsprechende T-förmige Nuten 31, die sich zum äußeren Zylindermantel 1 hin öffnen, sind in der äußeren Oberfläche 10 des inneren Zylindermantels 2 vorgesehen. Über in die Nuten 30, 31 eingesetzte Doppel-T-Träger 32 erfolgt dann eine Formschlussverbindung zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2, die zugleich eine Abstützung des äußeren Zylindermantels 1 auf dem inneren Zylindermantel 2 bewirkt. Die Doppel-T-Träger 32 können dabei ein solches Außenmaß aufweisen, dass sich ein Spiel zwischen diesen und den T-Nuten 30, 31 ergibt, insbesondere ein Rücken- und Seitenspiel. Die Montage erfolgt durch Einschieben der Doppelt-T-förmigen Träger 32 in die Nuten 30, 31, nachdem der äußere Zylindermantel 1 auf den inneren Zylindermantel 2 aufgeschoben wurde. Fig. 4 shows different variants of a positive connection between the outer cylinder shell 1 and inner cylinder shell 2. As shown at B1, for this purpose, the outer cylinder shell 1 may be provided on its inner shell side 9 in the axial direction or another direction extending projections 29, in which the inner cylinder shell 2 out open, T-shaped grooves 30 are provided. Corresponding T-shaped grooves 31, which open to the outer cylinder shell 1, are provided in the outer surface 10 of the inner cylinder shell 2. About inserted into the grooves 30, 31 double T-beam 32 is then a positive connection between the outer cylinder shell 1 and inner cylinder shell 2, which also causes a support of the outer cylinder shell 1 on the inner cylinder shell 2. The double-T-beams 32 may have such an outer dimension that a game between them and the T-slots 30, 31 results, in particular a back and side play. The assembly is carried out by inserting the double-T-shaped carrier 32 in the grooves 30, 31, after the outer cylinder shell 1 has been pushed onto the inner cylinder shell 2.

Bei der bei B2 dargestellten Variante sind ebenfalls T-förmige Nuten 33 in der äußeren Oberfläche 10 des inneren Zylindermantels 2 vorgesehen. In diese greifen jedoch im Querschnitt T-förmige Vorsprünge 34 auf der Mantelinnenseite 9 des äußeren Zylindermantels 1. Die Montage erfolgt hier durch einfaches Aufschieben des äußeren Zylindermantels 1 auf den inneren Zylindermantel 2. Auch hier kann die Verbindung mit oder ohne Spiel ausgebildet sein.In the variant shown at B2 also T-shaped grooves 33 are provided in the outer surface 10 of the inner cylinder shell 2. In this, however, engage in cross-section T-shaped projections 34 on the inner shell side 9 of the outer cylinder shell 1. The assembly is done here by simply pushing the outer cylinder shell 1 on the inner cylinder shell 2. Again, the connection can be formed with or without play.

Die Nut 33 kann wie die Nut 31 bei der zuvor beschriebenen Variante bevorzugt in die äußere Oberfläche 10 des inneren Zylindermantels 2 gefräst sein. Es sind aber auch andere Herstellungsverfahren möglich.The groove 33, like the groove 31 in the variant described above, may preferably be milled into the outer surface 10 of the inner cylinder jacket 2. But there are also other manufacturing methods possible.

Die bei B3 dargestellte Variante unterscheidet sich von der bei B2 dargestellten Variante dadurch, dass die Nut 33 zur Aufnahme des im Querschnitt T-förmigen Fortsatzes 34 nicht in die äußere Oberfläche 10 des inneren Zylindermantels 2 gefräst sondern durch Anschweißen eines entsprechenden Nutprofils 35 gebildet ist. Der Vorsprung 34 ist entsprechend kürzer ausgebildet und stützt sich über das Nutprofil 35 auf der äußeren Oberfläche 10 des inneren Zylindermantels 2 ab. Auch hier ist die Verbindung bevorzugt mit Rücken- und Seitenspiel ausgebildet. Gegenüber der Variante von B1 ist hier also keine Nut im inneren Zylindermantel 2 erforderlich.The variant shown at B3 differs from the variant shown at B2 in that the groove 33 for receiving the cross-sectionally T-shaped projection 34 is not milled into the outer surface 10 of the inner cylinder shell 2 but is formed by welding a corresponding groove profile 35. The projection 34 is formed correspondingly shorter and is supported on the groove profile 35 on the outer surface 10 of the inner cylinder jacket 2 from. Again, the connection is preferably formed with back and side play. Compared to the variant of B1 no groove in the inner cylinder shell 2 is therefore required here.

Die Variante von B4 stimmt mit der Variante von B3 weitgehend überein. Der Unterschied besteht lediglich darin, dass die Nutprofile 35 nicht mit dem inneren Zylindermantel 2 verschweißt sondern über Schrauben 36 verschraubt sind. Die Nutprofile 35 weisen hierfür seitliche Gewindelöcher 37 auf.The variant of B4 is largely consistent with the variant of B3. The only difference is that the groove profiles 35 are not welded to the inner cylinder shell 2 but are screwed by screws 36. The groove profiles 35 have for this purpose lateral threaded holes 37.

Die bei B 5 dargestellte Variante zeichnet sich dadurch aus, das auf die Au-Benumfangsseite 9 des inneren Zylindermantels 2 Profile 38 aufgeschraubt sind, die auf ihrer radialen Außenseite einen im Querschnitt T-förmigen Abschnitt 39 aufweisen, der in die Nut 30 eines Vorsprungs 29 einführbar ist, der im Prinzip mit dem bei B1 dargestellten Vorsprung 29 übereinstimmt. Schrauben 36 sind hierfür in entsprechende, in seitlichen Flanschen 40 des Profils 38 vorgesehene Gewindelöcher 41 eingedreht. Auch bei dieser Variante ist bevorzugt ein Rücken- und Seitenspiel zwischen dem T-Abschnitt 39 und der Nut 30 vorhanden.The variant shown at B 5 is characterized by the fact that are screwed onto the Au Benumfangsseite 9 of the inner cylinder shell 2 profiles 38, which have on their radial outer side a cross-sectionally T-shaped portion 39 in the groove 30 of a projection 29th is inserted, which coincides in principle with the projection 29 shown at B1. Screws 36 are screwed into corresponding, provided in lateral flanges 40 of the profile 38 threaded holes 41 for this purpose. Also in this variant, a back and side clearance between the T-section 39 and the groove 30 is preferably present.

Die bei B6 dargestellte Variante ist ähnlich zu der bei B5 dargestellten Variante. Anstelle des Profils 38 ist hier ein T-Profil 42 vorgesehen, welches in eine Nut 43 auf der Außenseite 10 des inneren Zylindermantels 2 eingesetzt ist. Außerdem ist zur Befestigung des Profils 42 lediglich eine Reihe Schrauben 36 in entsprechende Gewindeloch 44 des Profils 42 eingesetzt.The variant shown at B6 is similar to the variant shown at B5. Instead of the profile 38, a T-profile 42 is provided here, which is inserted into a groove 43 on the outer side 10 of the inner cylinder jacket 2 is. In addition, only a number of screws 36 is inserted into corresponding threaded hole 44 of the profile 42 for fastening the profile 42.

Die bei B7 dargestellte Variante stimmt weitgehend mit der Variante von B4 überein. Das Nutprofil 45 ist hier jedoch mit zwei jeweils nach außen weisenden Flanschen 46 ausgebildet, in welchen jeweils Gewindelöcher 47 zum Eindrehen der Schrauben 36 vorgesehen sind. Darüber hinaus ist das Nutprofil 45 näher an die innere Oberfläche 9 des äußeren Zylindermantels 1 herangeführt, so dass der im Querschnitt T-förmige Vorsprung 34 entsprechend kürzer ist.The variant shown at B7 is largely consistent with the variant of B4. The groove profile 45 is here, however, formed with two outwardly facing flanges 46, in each of which threaded holes 47 are provided for screwing in the screws 36. In addition, the groove profile 45 is brought closer to the inner surface 9 of the outer cylinder shell 1, so that the cross-sectionally T-shaped projection 34 is correspondingly shorter.

Die bei B8 dargestellte Variante stimmt wiederum weitgehend mit der Variante von B3 überein. Das Nutprofil 48 ist hier jedoch nicht mit dem inneren Zylindermantel 2 verschweißt sondern wieder über Schrauben 36 verbunden. Hierfür weist das Nutprofil 48 auf seiner dem inneren Zylindermantel 2 zugewandten Seite entsprechende Gewindelöcher 49 auf. Auch ist das Nutprofil 48 hier wie bei der Variante von B7 näher an die innere Oberfläche 9 des äußeren Zylindermantels 1 geführt und wirkt mit entsprechend kürzer ausgeführten Vorsprüngen 34 auf der Innenseite 9 des äußeren Zylindermantels 1 zusammen.The variant shown at B8 in turn is largely consistent with the variant of B3. However, the groove profile 48 is not welded here with the inner cylinder shell 2 but again connected by screws 36. For this purpose, the groove profile 48 on its side facing the inner cylinder jacket 2 side corresponding threaded holes 49. Also, the groove profile 48 is guided here closer to the inner surface 9 of the outer cylinder shell 1 as in the variant of B7 and cooperates with correspondingly shorter protrusions 34 on the inner side 9 of the outer cylinder shell 1.

Auch bei den in Fig. 4 dargestellten Formschlussvarianten können auf der Innenseite 9 des äußeren Zylindermantels 1 Erhebungen 28 zur Erzeugung von Turbulenzen in einem sich bildenden Kondensat vorgesehen sein. Die Erhebungen 28 können wieder alle möglichen Formen und Orientierungen aufweisen, ragen jedoch bevorzugt ein geringes Stück über das Kondensat hinaus.Also with the in Fig. 4 illustrated form-fitting variants may be provided on the inside 9 of the outer cylinder shell 1 elevations 28 for generating turbulence in a forming condensate. The elevations 28 may again have all possible shapes and orientations, but preferably protrude a small distance beyond the condensate.

Fig. 5 zeigt vier weitere Formschlussvarianten. Bei C1 ist eine Variante dargestellt, bei welcher auf der äußeren Oberseite 10 des inneren Zylindermantels 2 ein Winkelprofil 50 angeschweißt ist. Mit diesem Winkelprofil 50 wirkt ein im Querschnitt L-förmiger Vorsprung 51 zusammen, der auf der Innenseite 9 des äußeren Zylindermantels 1 angeformt ist. Der Fuß 52 des Profils 51 untergreift das Winkelprofil 50 und stützt sich auf einem unter 5° angefrästen Sitz 53 auf der Außenseite 10 des inneren Zylindermantels 2 ab. Durch entsprechende Profilierung des Vorsprungs 51 ergibt sich eine selbsthemmende Verbindung zwischen dem äußeren Zylindermantel 1 und dem inneren Zylindermantel 2. Fig. 5 shows four other form-locking variants. At C1, a variant is shown in which on the outer upper side 10 of the inner cylinder jacket 2, an angle section 50 is welded. With this angled section 50, a cross-sectionally L-shaped projection 51 cooperates, which is formed on the inner side 9 of the outer cylinder shell 1. The foot 52 of the profile 51 engages under the angle section 50 and is supported on a milled at 5 ° seat 53 on the outer side 10 of the inner cylinder shell 2 from. By appropriate profiling of the projection 51 results in a self-locking connection between the outer cylinder shell 1 and the inner cylinder shell. 2

Zur Montage wird der äußere Zylindermantel 1 in der bei C1 gestrichelt dargestellten Stellung des Vorsprungs 51 axial auf den inneren Zylindermantel 2 aufgeschoben. Sodann wird der äußere Zylindermantel 1 gegenüber dem inneren Zylindermantel 2 in Richtung auf das Winkelprofil 50, in Fig. 5 also nach rechts, um die Achse des Trockenzylinders um den Abstand r verdreht, so dass der Vorsprung 51 mit seinem Fuß 52 das Winkelprofil 50 untergreift und selbsthemmend festgelegt wird.For assembly, the outer cylinder jacket 1 is slid axially onto the inner cylinder jacket 2 in the position of the projection 51 shown dashed at C1. Then, the outer cylinder jacket 1 relative to the inner cylinder jacket 2 in the direction of the angle section 50, in Fig. 5 that is, to the right, about the axis of the drying cylinder rotated by the distance r, so that the projection 51 engages with its foot 52, the angle section 50 and is set self-locking.

Die bei C2 dargestellte Variante stimmt weitgehend mit der Variante von C1 überein. Statt der selbsthemmenden Profilierung des Vorsprungs 51 ist hier lediglich eine Schraubverbindung zur Fixierung des äußeren Zylindermantels 1 gegenüber dem inneren Zylindermantel 2 vorgesehen. Hierfür ist der innere Zylindermantel 2 mit Löchern 54 versehen, durch welche Schrauben 55 geführt sind, die in Gewindelöcher 56 eindrehbar sind, die in Ansätzen 57 vorgesehen sind, welche auf der dem Fuß 52 des L-förmigen Vorsprungs 51 abgewandten Seite des Vorsprungs 51 in geeigneten Abständen in axialer Richtung vorgesehen sind. Die Montage erfolgt in entsprechender Weise wie bei der Variante von C1, wobei lediglich nach dem Verdrehen der beiden Zylindermäntel 1, 2 gegeneinander noch die Schrauben 55 eingedreht werden.The variant shown at C2 is largely consistent with the variant of C1. Instead of the self-locking profiling of the projection 51, only a screw connection for fixing the outer cylinder jacket 1 with respect to the inner cylinder jacket 2 is provided here. For this purpose, the inner cylinder shell 2 is provided with holes 54 through which screws 55 are guided, which are screwed into threaded holes 56 which are provided in lugs 57 which on the foot 52 of the L-shaped projection 51 opposite side of the projection 51 in suitable distances are provided in the axial direction. The assembly takes place in the same way as in the Variant of C1, wherein only after the rotation of the two cylinder jackets 1, 2 against each other nor the screws 55 are screwed.

Auch bei der bei C3 dargestellten Variante erfolgt die Fixierung der beiden Zylindermäntel 1, 2 gegeneinander über Schrauben 55. Diese sind hier jedoch anders als bei der Variante von C2 in Gewindelöcher 58 eingedreht, die im mit dem inneren Zylindermantel 2 verbundenen Winkelprofil 59 vorgesehen sind. Außerdem ist bei dieser Variante kein angefräster Sitz auf der Außenseite 10 des inneren Zylindermantels 2 vorhanden.Also in the variant shown at C3, the fixation of the two cylinder jackets 1, 2 against each other via screws 55. These are, however, screwed differently than in the variant of C2 in threaded holes 58, which are provided in connected to the inner cylinder jacket 2 angle profile 59. In addition, no milled seat on the outer side 10 of the inner cylinder jacket 2 is present in this variant.

Ein solcher angefräster Sitz ist wiederum bei der bei C4 dargestellten Variante vorhanden. Dieser Sitz 60 ist bei dieser Variante tangential angefräst. Im Übrigen stimmt diese Variante mit der Variante von C3 überein. Die Montage erfolgt bei beiden Varianten von C3 und C4 entsprechend der Variante von C2 durch Verdrehen des äußeren Zylindermantels 1 gegenüber dem inneren Zylindermantel 2 nach dem Aufschieben des äußeren Zylindermantels 1 und anschließendes Eindrehen der Schrauben 55.Such a milled seat is again present in the variant shown at C4. This seat 60 is tangentially milled in this variant. Incidentally, this variant is consistent with the variant of C3. The assembly takes place in both variants of C3 and C4 according to the variant of C2 by rotating the outer cylinder shell 1 relative to the inner cylinder shell 2 after pushing the outer cylinder shell 1 and then screwing the screws 55th

Fig. 6 zeigt schließlich nochmals vereinfacht den Aufbau der Trockenwalze als Ganzes mit äußerem Zylindermantel 1, innerem Zylindermantel 2, der an den beiden Deckeln 4 befestigt ist, die wiederum auf Achsen 5, 6 angeordnet sind. Die führerseitige Achse 5 weist die radialen Kanäle 12 sowie die konzentrischen axialen Kanäle 14 und 15, die triebseitige Achse 6 ebenfalls radiale Kanäle 1 auf. Nicht dargestellt sind auch hier die Verbindungskanäle zwischen den radialen Kanälen 12 bzw. 13 und dem Hohlraum 11 zwischen äußerem Zylindermantel 1 und innerem Zylindermantel 2. Die Fließrichtung des Heizfluids ist mit Pfeilen II dargestellt. Fig. 6 finally shows again simplified the structure of the drying roller as a whole with outer cylinder shell 1, inner cylinder shell 2, which is fixed to the two covers 4, which in turn are arranged on axes 5, 6. The driver-side axis 5, the radial channels 12 and the concentric axial channels 14 and 15, the drive-side axis 6 also radial channels 1 on. Not shown here are the connecting channels between the radial channels 12 and 13 and the cavity 11 between the outer cylinder shell 1 and inner cylinder shell 2. The flow direction of the heating fluid is shown by arrows II.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
äußerer Zylindermantelouter cylinder jacket
22
innerer Zylindermantelinner cylinder jacket
33
Befestigungsschraubefixing screw
44
Deckelcover
55
führerseitige Achsedriver-side axis
66
triebseitige Achsedrive-side axis
77
Außenseite von 1Outside of 1
88th
Umfangsfläche von 4Circumferential area of 4
99
Innenseite von 1Inside of 1
1010
Außenseite von 2Outside of 2
1111
Hohlraumcavity
1212
Radialkanalradial channel
1313
Radialkanalradial channel
1414
Axialkanalaxial
1515
Anschlussende von 14Connecting end of 14
1616
Axialkanalaxial
1717
Anschlussende von 16Connecting end of 16
1818
verjüngter Abschnitt von 1Rejuvenated section of 1
1919
SitzSeat
2020
Verbindungselementconnecting element
2121
Siphonsiphon
2222
Lochhole
2323
Schraubescrew
2424
Vorsprunghead Start
2525
Gewindelochthreaded hole
2626
SitzSeat
2727
Fuß von 24Foot of 24
2828
Erhebungsurvey
2929
Vorsprunghead Start
3030
Nutgroove
3131
Nutgroove
3232
Doppel-T-TrägerDouble-T-carrier
3333
Nutgroove
3434
Vorsprunghead Start
3535
Nutprofilgroove profile
3636
Schraubescrew
3737
Gewindelochthreaded hole
3838
Profilprofile
3939
T-Abschnitt von 38T section of 38
4040
Flanschflange
4141
Gewindelochthreaded hole
4242
T-ProfilT profile
4343
Nutgroove
4444
Gewindelochthreaded hole
4545
Nutprofilgroove profile
4646
Flanschflange
4747
Gewindelochthreaded hole
4848
Nutprofilgroove profile
4949
Gewindelochthreaded hole
5050
Winkelprofilangle section
5151
Vorsprunghead Start
5252
Fuß von 51Foot of 51
5353
SitzSeat
5454
Lochhole
5555
Schraubescrew
5656
Gewindelochthreaded hole
5757
Ansatzapproach
5858
Gewindelochthreaded hole
5959
Winkelprofilangle section
6060
SitzSeat
6161
Ringdichtungring seal
6262
Dichtungpoetry
6363
Schraubescrew
II
Drehachseaxis of rotation
IIII
Fließrichtungflow direction
d1 d 1
Dicke von 1Thickness of 1
d2 d 2
Dicke von 2Thickness of 2
rr
Abstanddistance

Claims (50)

  1. Device for producing and/or finishing a web of fibrous material, in particular a paper or paperboard web, having a heatable and rotatable cylinder, in particular a drying cylinder of a drying section, having a cylinder shell (1) which can be loaded from the inside with a heating fluid, at least one channel (11) for passing the heating fluid through being formed below the outer surface (7) of the cylinder shell (1), in order to form the at least one channel (11), a further cylinder shell (2) which is spaced apart from the outer cylinder shell (1) being arranged within the cylinder shell (1), the outer cylinder shell (1) being formed by covering plates, characterized in that the covering plates are combined with web plates to form profiles, in particular to form U-shaped or T-shaped profiles.
  2. Device according to Claim 1, characterized in that the outer cylinder shell (1) is supported on the inner cylinder shell (2).
  3. Device according to Claim 2, characterized in that the outer cylinder shell (1) is connected to the inner cylinder shell (2) via radial webs, rods, pins, rivets, bolts, screws and/or other connecting means (20).
  4. Device according to Claim 3, characterized in that the connecting means (20) extend or are arranged axially, in the circumferential direction and/or in a direction which lies between them.
  5. Device according to Claim 3 or 4, characterized in that the webs at least partially have passage openings for the heating fluid.
  6. Device according to one of Claims 1 to 5, characterized in that the inner shell (2) and the outer shell (1) are composed of the same or of a different metallic material.
  7. Device according to one of the preceding claims, characterized in that at least one cylinder shell (1, 2) is composed of material having high thermal conductivity, in particular steel, preferably boiler steel, copper, aluminum or bronze.
  8. Device according to one of Claims 1 to 7, characterized in that the inner cylinder shell (2) is configured as a thick-walled tube.
  9. Device according to one of Claims 1 to 7, characterized in that the inner cylinder shell (2) comprises two or more individual shells.
  10. Device according to one of Claims 1 to 7, characterized in that the inner cylinder shell (2) is configured as a framework or as a frame/rib construction.
  11. Device according to one of Claims 1 to 10, characterized in that the inner side (9) of the outer cylinder shell (1) is provided with elevations (28).
  12. Device according to Claim 11, characterized in that the inner side (9) of the outer cylinder shell (1) is provided with ribs and/or lugs and/or a grid or honeycomb structure.
  13. Device according to Claim 11 or 12, characterized in that the height of the elevations (28) is selected in such a way that they protrude out of a fluid condensate which is formed during operation.
  14. Device according to Claim 13, characterized in that the elevations (28) protrude out of the fluid condensate as little as possible.
  15. Device according to one of Claims 11 to 14, characterized in that elevations (28) are provided which extend in the cylinder longitudinal direction and/or are helical.
  16. Device according to one of the preceding claims, characterized in that one or more siphons (21) is/are provided for discharging condensate which is formed during the operation.
  17. Device according to Claim 16, characterized in that at least one stationary and/or at least one corotating siphon (21) are/is provided.
  18. Device according to one of the preceding claims, characterized in that the outer shell face (7) of the drying cylinder is provided with a coating or covering.
  19. Device according to Claim 18, characterized in that the coating or covering is suitable for corrosion and/or abrasion protection and/or for improving the surface properties.
  20. Device according to one of the preceding Claims 3 to 19, characterized in that web faces are provided as connecting elements (20) between the outer cylinder shell (1) and the inner cylinder shell (2).
  21. Device according to one of the preceding Claims 3 to 20, characterized in that the connecting elements between the outer cylinder shell (1) and the inner cylinder shell (2) comprise screws.
  22. Device according to one of the preceding Claims 3 to 21, characterized in that the connecting elements between the outer cylinder shell (1) and the inner cylinder shell (2) comprise a conical seat.
  23. Device according to one of the preceding Claims 3 to 22, characterized in that the connecting elements between the outer cylinder shell (1) and the inner cylinder shell (2) comprise a form-fitting connection, in particular an L-groove, T-groove or dovetail connection.
  24. Device according to Claim 23, characterized in that a soldered connection is provided additionally.
  25. Device according to Claim 23, characterized in that the connection is configured without play.
  26. Device according to one of the preceding Claims 3 to 25, characterized in that the connecting elements between the outer cylinder shell (1) and the inner cylinder shell (2) comprise a press fit.
  27. Device according to one of the preceding Claims 3 to 26, characterized in that clamping elements are provided as connecting elements between the outer cylinder shell (1) and the inner cylinder shell (2).
  28. Device according to one of the preceding Claims 3 to 27, characterized in that self-locking connecting elements are provided.
  29. Device according to one of the preceding claims, characterized in that a latching connection is provided between the outer cylinder shell (1) and the inner cylinder shell (2).
  30. Device according to one of the preceding Claims 1 to 7 and 9 to 29, characterized in that the inner cylinder shell (2) is composed from individual metal sheets, in particular with a welded connection between the individual metal sheets.
  31. Device according to one of the preceding Claims 1 to 29, characterized in that the inner cylinder shell (2) is manufactured from one piece.
  32. Device according to one of the preceding Claims 3 to 31, characterized in that bolts are provided as connecting elements, which are guided through holes in the outer cylinder shell (1) and are connected to the inner cylinder shell (2), in particular by rotary friction welding or resistance pressure welding or by screwing in.
  33. Device according to one of the preceding Claims 1 to 29, 31 and 32, characterized in that the inner cylinder shell is manufactured in one piece over the entire length, for example by casting.
  34. Device according to one of the preceding Claims 1 to 29 and 31 to 33, characterized in that the inner cylinder shell (2) and the connecting elements (20) are manufactured in one piece.
  35. Device according to one of the preceding Claims 3 to 34, characterized in that webs which are divided obliquely over their height are provided as connecting elements.
  36. Device according to one of the preceding claims, characterized in that the heating fluid is fed in and discharged via the cylinder axles (5, 6) of the drying cylinder.
  37. Device according to Claim 36, characterized in that the feed and discharge channels are arranged such that they are nested inside one another at least partially.
  38. Device according to either of the preceding Claims 36 and 37, characterized in that a cover (4) having radial channels for the heating fluid is provided at least on the feed side.
  39. Device according to one of the preceding claims, characterized in that the outer side (7) of the drying cylinder is turned.
  40. Device according to one of the preceding Claims 11 to 15, characterized in that the elevations (28) are milled, drawn, pressed, rolled or cast.
  41. Device according to one of the preceding Claims 3 to 40, characterized in that the connecting elements (20) are manufactured by removing material, by primary forming technology or by forming technology.
  42. Method for producing a web of fibrous material, in particular a paper or paperboard web, characterized in that a device according to one of the preceding claims is used.
  43. Method according to Claim 42, characterized in that one or more drying cylinders according to one of the preceding claims is/are used.
  44. Method according to Claim 42 or 43, characterized in that contact is always made with the web of fibrous material on the same side.
  45. Method according to Claim 42 or 43, characterized in that contact is made with the paper web on both sides.
  46. Method according to one of Claims 42 to 45, characterized in that auxiliary means are used for web guidance, in particular a suction or blower box, an evacuated or nonevacuated roll, an airblade and/or a dryer fabric.
  47. Method according to one of Claims 42 to 46, characterized in that one or more drying cylinders according to one of the preceding claims is/are combined with conventional drying processes, in particular cylinder drying, the boost dryer process, the Condebelt process, a yankee cylinder or a HiDryer.
  48. Method according to one of Claims 42 to 47, characterized in that a metal belt with the web of fibrous material is guided over the drying cylinder.
  49. Method according to Claim 48, characterized in that the metal belt is cooled.
  50. Method according to Claim 48 or 49, characterized in that the metal belt is guided over the drying cylinder under stress.
EP05811124A 2005-01-05 2005-11-22 Device and method for producing and/or transforming a web of fibrous material Not-in-force EP1836346B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005000795A DE102005000795A1 (en) 2005-01-05 2005-01-05 Apparatus and method for producing and / or refining a fibrous web
PCT/EP2005/056144 WO2006072505A1 (en) 2005-01-05 2005-11-22 Device and method for producing and/or transforming a web of fibrous material

Publications (2)

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EP1836346A1 EP1836346A1 (en) 2007-09-26
EP1836346B1 true EP1836346B1 (en) 2011-04-13

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EP (1) EP1836346B1 (en)
JP (1) JP2008527179A (en)
CN (1) CN101098996A (en)
AT (1) ATE505585T1 (en)
BR (1) BRPI0518122A (en)
DE (2) DE102005000795A1 (en)
RU (1) RU2380469C2 (en)
WO (1) WO2006072505A1 (en)

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BRPI0518122A (en) 2008-10-28
WO2006072505A1 (en) 2006-07-13
US20080005921A1 (en) 2008-01-10
DE502005011255D1 (en) 2011-05-26
RU2380469C2 (en) 2010-01-27
EP1836346A1 (en) 2007-09-26
DE102005000795A1 (en) 2006-07-13
JP2008527179A (en) 2008-07-24
CN101098996A (en) 2008-01-02
RU2007129847A (en) 2009-02-20
ATE505585T1 (en) 2011-04-15

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