EP1387993B1 - Cylindre a passage d'air - Google Patents

Cylindre a passage d'air Download PDF

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Publication number
EP1387993B1
EP1387993B1 EP02738035A EP02738035A EP1387993B1 EP 1387993 B1 EP1387993 B1 EP 1387993B1 EP 02738035 A EP02738035 A EP 02738035A EP 02738035 A EP02738035 A EP 02738035A EP 1387993 B1 EP1387993 B1 EP 1387993B1
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EP
European Patent Office
Prior art keywords
webs
cylinder according
flow cylinder
running
reinforced plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02738035A
Other languages
German (de)
English (en)
Other versions
EP1387993A1 (fr
Inventor
Thomas Thoröe Scherb
Harald Schmidt-Hebbel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP1387993A1 publication Critical patent/EP1387993A1/fr
Application granted granted Critical
Publication of EP1387993B1 publication Critical patent/EP1387993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/16—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning perforated in combination with hot air blowing or suction devices, e.g. sieve drum dryers
    • 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
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated 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
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated cylinders
    • D21F5/184—Surfaces thereof

Definitions

  • the invention relates to a flow-through cylinder for a through-flow drying plant, in particular for tissue.
  • a flow-through cylinder of this type is specified, for example, in an article "High-tech through-flow drying for tissue” by Fleissner GmbH in ipw 3/2001, page 21.
  • the previously known flow-through cylinders also referred to as TAD (through-air drying) cylinders, are made of metal.
  • the tissue web is guided over the flow-through cylinder on a sieve.
  • a gaseous medium is pressed through the tissue web by means of the flow-through.
  • This gaseous medium or fluid may have a temperature of over 300 ° C. In the case of a web break, this temperature acts directly on the sieve, which is no longer cooled by the tissue web.
  • the screen is cooled using a cold water spray tube shock. This thermal shock is also exposed to the flow-through cylinder, which leads to extreme thermal stresses.
  • elaborate constructions are necessary (see the article "Hightech fürströmtrocknung für Tissue" by Fleissner GmbH in ipw 3/2001, page 21).
  • the preamble of claim 1 is known from US-A-5766120 known.
  • the aim of the invention is to provide an improved flow cylinder of the type mentioned, in which the aforementioned problems are eliminated.
  • the material of the fiber-reinforced plastic in particular glass fibers, aramid fibers and / or preferably obtained carbon fibers.
  • the flow-through cylinder can thus consist at least partially in particular of carbon-reinforced plastic (CFRP).
  • the matrix material of the fiber-reinforced plastic from a preferably at least up to 300 ° C heat-resistant material.
  • This material may be, for example, resin or the like.
  • At least one fiber layer is provided and the fiber layer is selected so that the thermal expansion coefficient ⁇ of the fiber-reinforced plastic is smaller than that of steel at about 300 ° C., and preferably in a range 0 ⁇ ⁇ ⁇ 9 ⁇ 10 -6 ⁇ 1 / Kelvin lies.
  • the thermal expansion coefficient ⁇ of the fiber-reinforced plastic is smaller than approximately at least in the circumferential direction 3 ⁇ 10 - 6 ⁇ 1 K . especially smaller than about 2 ⁇ 10 - 6 ⁇ 1 K and preferably less than about 1 ⁇ 10 - 6 ⁇ 1 K ,
  • plastic suitably more than about 30%, in particular more than about 50% and preferably more than about 70% of the fibers are oriented at least substantially in the circumferential direction.
  • the flexural rigidity of the cylinder in question is very small.
  • Such a fiber layer is therefore not possible, for example, in guide rolls or smaller cylinders.
  • the fibers are axially aligned at least in the outermost layer (cf., for example EP-A-0 363 887 ).
  • the cylinder diameter is therefore ⁇ 2, 5 m, in particular> 4 m and preferably> 4.5 m, whereby a sufficient flexural rigidity is ensured even with wide tissue machines greater than 5 m.
  • the flow-through cylinder may generally comprise a jacket, end caps with bearing journals and at least on one side, preferably the drive side, a fluid outlet, for example air outlet. If appropriate, it is also possible to provide a feed connection or a fluid supply opening.
  • a suction box or a blow box can accordingly be provided, through which the drying fluid, for example drying air, can be removed or supplied.
  • the suction or blow box can span at least substantially the region or sector of the flow-through cylinder which is looped around by the web, as a result of which false air or leakage air is avoided.
  • the non-looped area can be covered, for example, with a cover plate to avoid false air.
  • the jacket can be made of individual elements, for example.
  • the extending in the circumferential direction webs are preferably glued to the axially extending webs.
  • the flow-through cylinder is expediently provided with a floating bearing to absorb the corresponding axial displacements.
  • An advantageous alternative embodiment of the flow-through cylinder according to the invention is characterized in that it extends in the circumferential direction, in particular annular webs and extending in the axial direction webs that both the circumferentially extending webs and extending in the axial direction webs each consist at least partially of fiber-reinforced plastic and in that the webs extending in the circumferential direction and the webs extending in the axial direction are connected to one another in a form-fitting manner and are preferably adhesively bonded together.
  • the fibers in the circumferentially extending webs are preferably oriented in the circumferential direction and the fibers in the axially extending webs in the axial direction, which brings a high flexural rigidity for the flow-through cylinder with it.
  • the jacket is expediently provided with quadrangular, in particular square or preferably rectangular openings. These passage openings can be formed in particular between the webs.
  • the open area is preferably in a range of about 95% to 98%. Preferred dimensions of the openings are 60 mm x 120 mm.
  • the axially extending webs are higher than the circumferentially extending webs.
  • the vonströmsieb rests on the axially extending webs.
  • the flow-through cylinder can for example also consist of segments which are glued together and / or screwed. It is also conceivable that it consists of individual short cylindrical sections, e.g. glued or screwed together. A consequent advantage is that a smaller autoclave is sufficient in the curing process.
  • both the webs running in the circumferential direction and the webs extending in the axial direction end in the circumferential plane of the flow-through cylinder.
  • the through-flow screen also referred to as TAD (through air drying) screen, rests on the circumferentially extending ridges and the axial ridges.
  • the flow-through cylinder may be covered with a screen sock in order to uniform the flow of the passing gaseous medium, for example air, and thereby avoid markings. This is particularly advantageous when the open area is less than 96%.
  • the Siebstrumpf can for example consist of a preferably at least 250 ° C heat resistant material, for example metal.
  • the webs extending in the axial direction and the webs running in the circumferential direction may have openings which allow cross flows and thus equalize the flow.
  • the jacket of the flow-through cylinder consists of layers of fiber-reinforced plastic produced in particular by the winding method. It can be provided, for example, with round, square and / or rectangular openings. The openings may already be recessed in the manufacturing process (e.g., winding process) or subsequently machined, i. in particular by drilling and / or milling generated.
  • FIG. 1 shows a schematic partial representation of a through-flow drying plant 10, in particular for tissue.
  • This through-flow drying plant 10 comprises a flow-through cylinder 12, around which a modalitysieb 14 is guided. Together with the modströmsieb 14 a tissue web is guided around the flow cylinder 12.
  • the flow-through cylinder 12 is associated with a hood 16, which is supplied in the present case via a line 18 dry hot air, which is supplied by a burner 20.
  • a suction box or a blow box can be provided, through which the drying air can be removed or supplied.
  • a suction box 22 is provided in the interior of the flow-through cylinder 12. The mixture of hot air and steam is removed via lines 24. A portion of this mixture can also be fed back to the burner 20 via a line 26.
  • the throughflow cylinder 12 comprises a jacket 28, end-side cover 30, and, at least on one side, preferably the drive side, a vent opening 32 for damp hot air.
  • this vent opening is provided in the respective journal 34.
  • the axis of the flow-through cylinder 12 is indicated in Fig. 2 with "X".
  • the purely schematically indicated surface 28 of the flow-through cylinder 12 is provided with passage openings 36.
  • At least the jacket 28 of the flow-through cylinder 12 is at least partially made of fiber-reinforced plastic.
  • the material of the fiber-reinforced plastic may contain, for example, glass fibers, aramid fibers and / or preferably carbon fibers.
  • the jacket 28 may thus consist at least partially in particular of carbon fiber reinforced plastic (CFRP).
  • CFRP carbon fiber reinforced plastic
  • FIG. 3 shows a schematic section of the jacket 28 of an embodiment of the flow-through cylinder 12 made of several individual parts.
  • the jacket 28 comprises circumferentially extending, in particular annular, webs 38 and extending in the axial direction webs 40th
  • the circumferentially extending webs 38 at least partially made of fiber-reinforced plastic whose fibers are oriented mainly in the circumferential direction, and extending in the axial direction webs 40 at least partially made of metal and preferably with recesses 42 for the are provided in the circumferential direction webs 38.
  • the circumferentially extending webs 38 may with the in.
  • Axially extending webs 40 be glued.
  • the axially extending webs 40 may be associated with a floating bearing.
  • both the circumferentially extending webs 38 and the axially extending webs 40 each consist at least partially of fiber reinforced plastic and the circumferentially extending webs 38 and extending in the axial direction webs 40 form fit with each other connected and preferably glued together.
  • the fibers are preferably oriented in the circumferential direction in the circumferential direction webs 38, preferably in the circumferential direction and the fibers in the axially extending webs 40 in the axial direction.
  • the jacket 28 may be provided with quadrangular, in particular square or preferably rectangular passage openings 36, which may be formed in the present case between the webs 38, 40.
  • the height of the circumferentially extending webs 38 is indicated in Fig. 3 with hu and the height of the axially extending webs 40 with h a .
  • these heights hu and h a can be the same size or different.
  • the axially extending lands 40 may be taller than the circumferentially extending lands 38.
  • the heights h a of the axial lands 40 may be greater than about 100 mm, preferably greater than about 200 mm.
  • FIG. 4 shows a schematic section of the jacket 28 of an embodiment of the flow-through cylinder 12, in which the jacket 28 consists of layers of fiber-reinforced plastic produced in particular by the winding process and with, for example, round, square and / or rectangular through openings 36 in the present case is provided. To equalize the flow connecting channels between adjacent holes or openings can be provided.
  • FIG. 5 shows a schematic section through the cylinder jacket 28 shown in FIG. 4, the passage openings 36 can be countersunk.
  • the outer radius of the jacket 28 is indicated by “r a " and the inner radius by “r i ".
  • the radial thickness of the shell 28 is designated “r M ". This can be in particular ⁇ 100 mm and preferably ⁇ 200 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforced Plastic Materials (AREA)
  • Massaging Devices (AREA)
  • Materials For Medical Uses (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Sliding-Contact Bearings (AREA)

Claims (28)

  1. Cylindre à passage d'air (12) constitué au moins en partie de matière plastique renforcée par des fibres, pour une installation de séchage à passage d'air (10), notamment pour du papier-tissu,
    caractérisé en ce
    qu'il comprend des ailettes (38) s'étendant dans la direction périphérique, notamment de forme annulaire, et des ailettes (40) s'étendant dans la direction axiale, les ailettes (38) s'étendant dans la direction périphérique se composent au moins en partie de matière plastique renforcée par des fibres, dont les fibres sont orientées principalement dans la direction périphérique, et les ailettes (40) s'étendant dans la direction axiale se composent au moins en partie de métal et sont pourvues de préférence d'évidements (42) pour les ailettes (38) s'étendant dans la direction périphérique.
  2. Cylindre à passage d'air selon la revendication 1, caractérisé en ce que
    le matériau de la matière plastique renforcée par des fibres contient des fibres de verre, des fibres d'aramide et/ou de préférence des fibres de carbone (CFK).
  3. Cylindre à passage d'air selon la revendication 1 ou 2,
    caractérisé en ce que
    le matériau de la matrice de la matière plastique renforcée par des fibres se compose d'un matériau résistant à la chaleur de préférence au moins jusqu'à 300°C, comme par exemple de la résine.
  4. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'on prévoit au moins une couche de fibres et la couche de fibres est choisie de telle sorte que le coefficient de dilatation thermique α de la matière plastique renforcée par des fibres soit inférieur à celui de l'acier à environ 300°C et de préférence se situe dans la plage de 0 ≤ α < 9.10-6.1/Kelvin.
  5. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    plus d'environ 30 %, notamment plus d'environ 50 % et de préférence plus d'environ 70 % des fibres de la matière plastique renforcée par des fibres sont orientées au moins essentiellement dans la direction périphérique.
  6. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'il présente un diamètre ≥ 2,5 m, notamment > 4 m et de préférence > 4,5 m.
  7. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'au moins son enveloppe (28) se compose au moins en partie de matière plastique renforcée par des fibres, de préférence de matière plastique renforcée par des fibres de carbone (CFK).
  8. Cylindre à passage d'air selon la revendication 7,
    caractérisé en ce que
    les ailettes (38) s'étendant dans la direction périphérique sont collées aux ailettes (40) s'étendant dans la direction axiale.
  9. Cylindre à passage d'air selon la revendication 7 ou 8,
    caractérisé en ce
    qu'il est pourvu d'un palier libre.
  10. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ailettes (40) s'étendant dans la direction axiale se composent également à chaque fois au moins en partie de matière plastique renforcée par des fibres, et en ce que les ailettes (38) s'étendant dans la direction périphérique et les ailettes (40) s'étendant dans la direction axiale sont connectées les unes aux autres par coopération de forme et de préférence sont collées ensemble.
  11. Cylindre à passage d'air selon la revendication 10,
    caractérisé en ce que
    les fibres dans les ailettes (38) s'étendant dans la direction périphérique sont orientées dans la direction périphérique et les fibres dans les ailettes (40) s'étendant dans la direction axiale sont orientées dans la direction axiale.
  12. Cylindre à passage d'air selon la revendication 10 ou 11,
    caractérisé en ce que
    son enveloppe (28) est pourvue d'ouvertures de passage (36) quadrilatérales, notamment carrées ou de préférence rectangulaires.
  13. Cylindre à passage d'air selon la revendication 12,
    caractérisé en ce que
    les ouvertures de passage (36) sont formées entre les ailettes (38, 40).
  14. Cylindre à passage d'air selon la revendication 12 ou 13,
    caractérisé en ce que
    la surface ouverte est comprise dans une plage d'environ 95 % à 98 %.
  15. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la dimension des ouvertures de passage respectives (36) est respectivement de 60 mm x 120 mm.
  16. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ailettes (40) s'étendant dans la direction axiale sont plus hautes que les ailettes (38) s'étendant dans la direction périphérique.
  17. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ailettes (38) s'étendant dans la direction périphérique ainsi que les ailettes (40) s'étendant dans la direction axiale se terminent dans le plan périphérique.
  18. Cylindre à passage d'air selon l'une quelconque des revendications 1 à 16,
    caractérisé en ce que
    les ailettes (40) s'étendant dans la direction axiale dépassent radialement vers l'extérieur par rapport aux ailettes (38) s'étendant dans la direction périphérique.
  19. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'il est revêtu d'un manchon formant tamis, notamment pour une surface ouverte < 96 %.
  20. Cylindre à passage d'air selon la revendication 19,
    caractérisé en ce que
    le manchon formant tamis se compose d'un matériau résistant à la chaleur de préférence au moins jusqu'à 250°C, par exemple du métal.
  21. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    son enveloppe se compose de couches produites notamment après le procédé d'enroulement, en matière plastique renforcée par des fibres, et est pourvue d'ouvertures de passage par exemple rondes, carrées et/ou rectangulaires.
  22. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les fibres présentent, au moins dans une direction, un coefficient de dilatation thermique inférieur à celui de la matière plastique.
  23. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'il se compose de segments qui sont notamment collés ensemble et/ou vissés.
  24. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'il se compose de portions cylindriques individuelles, notamment courtes, qui sont de préférence collées ensemble ou vissées.
  25. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les ailettes s'étendant dans la direction axiale et les ailettes s'étendant dans la direction périphérique présentent des interruptions.
  26. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les hauteurs (ha) des ailettes (40) s'étendant dans la direction axiale sont plus grandes qu'environ 100 mm et de préférence plus grandes qu'environ 200 mm.
  27. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    des canaux de connexion sont prévus entre des ouvertures de passage ou des alésages adjacents.
  28. Cylindre à passage d'air selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'épaisseur radiale (rM) de l'enveloppe (28) est ≥ 100 mm et de préférence ≥ 200 mm.
EP02738035A 2001-05-16 2002-05-06 Cylindre a passage d'air Expired - Lifetime EP1387993B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10123809A DE10123809A1 (de) 2001-05-16 2001-05-16 Durchströmzylinder
DE10123809 2001-05-16
PCT/EP2002/004987 WO2002093096A1 (fr) 2001-05-16 2002-05-06 Cylindre a passage d'air

Publications (2)

Publication Number Publication Date
EP1387993A1 EP1387993A1 (fr) 2004-02-11
EP1387993B1 true EP1387993B1 (fr) 2007-07-04

Family

ID=7684992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738035A Expired - Lifetime EP1387993B1 (fr) 2001-05-16 2002-05-06 Cylindre a passage d'air

Country Status (5)

Country Link
US (2) US7331120B2 (fr)
EP (1) EP1387993B1 (fr)
AT (1) ATE366398T1 (fr)
DE (2) DE10123809A1 (fr)
WO (1) WO2002093096A1 (fr)

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DE202007016425U1 (de) * 2007-11-22 2008-01-31 Herbert Olbrich Gmbh & Co. Kg Vorrichtung zum Behandeln einer Substratbahn
US8622730B2 (en) 2008-12-23 2014-01-07 General Mills, Inc. Dough forming and cutting apparatus and method
US8622729B2 (en) 2008-12-23 2014-01-07 General Mills, Inc. Dough cutting and stamping apparatus and method
US10710325B2 (en) 2016-12-29 2020-07-14 Laslo Olah Tubular protector assembly
US11013238B2 (en) 2018-05-24 2021-05-25 General Mills, Inc. Rotary dough cutter and method of operation

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Also Published As

Publication number Publication date
ATE366398T1 (de) 2007-07-15
DE50210415D1 (de) 2007-08-16
US20040216323A1 (en) 2004-11-04
DE10123809A1 (de) 2002-11-21
WO2002093096A1 (fr) 2002-11-21
EP1387993A1 (fr) 2004-02-11
US7331120B2 (en) 2008-02-19
US20060254075A1 (en) 2006-11-16

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