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EP1771622B1 - Cylindre de machine formant des bandes - Google Patents

Cylindre de machine formant des bandes Download PDF

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Publication number
EP1771622B1
EP1771622B1 EP05756310A EP05756310A EP1771622B1 EP 1771622 B1 EP1771622 B1 EP 1771622B1 EP 05756310 A EP05756310 A EP 05756310A EP 05756310 A EP05756310 A EP 05756310A EP 1771622 B1 EP1771622 B1 EP 1771622B1
Authority
EP
European Patent Office
Prior art keywords
piece
plate
roll
protruding shaft
roll according
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
EP05756310A
Other languages
German (de)
English (en)
Other versions
EP1771622A2 (fr
Inventor
Leo Kurkinen
Rami Vanninen
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of EP1771622A2 publication Critical patent/EP1771622A2/fr
Application granted granted Critical
Publication of EP1771622B1 publication Critical patent/EP1771622B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • D21G9/0072—Devices for threading a web tail through a paper-making machine using at least one rope
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0226—Bearings

Definitions

  • the present invention relates to a roll for a web forming machine, which roll includes a shell, with end pieces at both ends of it to support the roll rotatably in the web forming machine, which end pieces are arranged to be detachably attached at each end of the shell, and in each of which end pieces there is an end plate with a protruding shaft in it for support in a bearing arrangement.
  • the shell and its end pieces are separate pieces. Thus they can be made separately and finally balanced in connection with the assembly of the roll, or afterwards.
  • the known end pieces are manufactured by machining from cast pieces. Due to the manufacturing technique in question, the end piece becomes large and heavy. In addition, there are several labourious stages in manufacture.
  • the dimensioning of the end piece and the protruding shaft must take into account the manufacturing-technique limitations of both structures. For example, the casting technique requires the end plate to be dimensioned to be unnecessarily thick.
  • a cast end piece is poor in terms of vibration. Particularly the protruding shaft bends more than the rest of the roll, which increases vibration in the roll during operation. In practice, the flexibility of the end pieces differs from that of the shell while the end piece also has no damping ability at all.
  • a roll for a web forming machine according to the preamble of claim 1 is known from US 4,820,947 .
  • US 5,837,101 describes a device for threading a paper web from a dryer section to a finishing device situated after the dryer section in the running direction of the web including a rope threading arrangement.
  • a leader strip is separated from the edge of the paper web in the dryer section and the leader strip is directed between a pair of ropes included in the rope threading arrangement.
  • the leader strip is carried to the finishing device on support of the ropes.
  • a rope gap is formed out of the ropes and the leader strip, which is supported by the drying wire thereat, is transferred by an air blowing into the rope gap.
  • the characteristic features of the roll according to the present invention appear in the accompanying Claim 1.
  • the roll according to the invention there is a new type of end piece, which is considerably stiffer than before relative to its weight. Thus the rotational speed of the roll can be increased without vibration becoming too great.
  • the end piece is formed from several different parts, which are additionally attached to each other in a new way. In practice too, the parts can be dimensioned optimally nearly independently of each other while the finished construction is, in addition, light. Further, various functions can be arranged in the end piece, which in the prior art would be difficult and even impossible to implement.
  • Figure 1 shows the roll according to the invention, which is intended for a web forming machine.
  • the web forming machine is a paper or board machine, in which the roll is used, for example, as a guide or nip roll.
  • the roll includes a shell 10 with end pieces 11 at both of its ends, for supporting the roll rotatably in bearing arrangements 12 in the web forming machine.
  • the shell can be a cast shell or a shell made from a sheet material.
  • the shell can also have surface treatment or a cover.
  • Figure 1b shows the end piece 11 according to the invention, which is generally fitted detachably onto each end of the shell.
  • Figure 2 shows the end piece 11, which includes a separate inner piece 17, in greater detail.
  • the inner piece 17 there is an internal hole 18 corresponding to the protruding shaft 14, for attaching the protruding shaft 14.
  • the end plate 13 is supported on the inner piece 17 by at least one plate piece 19.
  • the end piece 13, the protruding shaft 14, and the inner piece 17 are separately machined bodies of revolution.
  • the tolerance between the parts can be made accurately.
  • a thin end plate can be used, which will substantially reduce the weight of the end piece.
  • the end piece is stiff, because the various parts form a cell structure.
  • Other advantageous features of the cell structure are presented later.
  • the protruding shaft 14 and the inner piece 17 are fitted to each other with a shrink-fit joint.
  • the protruding shaft 14 and the inner piece 17 are fitted to each other with a shrink-fit joint.
  • This is thus preferably a question of a force-fit joint, in which force is transmitted with the aid of the friction in the joint surfaces.
  • the plate piece is manufactured from one or more plate parts and the end plate and the inner piece are arranged coaxially relative to each other. Thus it is easy to attach the various parts to each other while the finished end piece is accurate in shape and its dimensions, which reduces the need for finishing machining and also facilitates the balancing of the roll.
  • the end plate 13 is a circular plate, in which there is an installation hole 20 for the inner piece 17.
  • the plate piece 19 is arranged to extend to the opposite end of the inner piece 17 and to that with the end plate 13.
  • the plate piece forms a conical triangular cell, the totality of which is extremely stiff, despite the thin structures.
  • the free length of the protruding shaft is also substantially reduced. In other words, the protruding shaft and the entire end piece deflect considerably less than the known construction, which also reduces vibration in the roll.
  • the plate piece according to the invention is thus arranged as a cone.
  • the conic angle ⁇ opens towards the shell.
  • the conic angle ⁇ is 45 - 140°, preferably 55 - 130°.
  • An increase in the diameter of the shell will naturally increase the conic angle.
  • the dimension of the inner piece is, for its part, limited by the joint between it and the protruding shaft.
  • Figure 4 shows a second embodiment of the end piece 11 according to the invention.
  • the end plate 13 is in fact a circular ring 21 and the end piece 11 includes a second plate piece 22.
  • the second plate piece 22 is thus arranged as part of the end plate 13.
  • the conic angle formed by the plate piece is, in this case, arranged to open away from the shell. This avoids the effect of the end piece in lengthening the roll, so that the roll can be fitted in even cramped positions. In other words, the roll can be made as short as possible.
  • the end piece 11 is arranged to be attached to a special ring piece 23, to which the shell of the roll is intended to be attached.
  • the bearing arrangement attached to the very end of the protruding shaft.
  • the free length of the protruding shaft is short and correspondingly the deflection of the protruding shaft is small.
  • free length refers to the distance between the bearing arrangement and the first support point of the end plate, over which the protruding shaft can deflect.
  • the bearing arrangement too permits a slight variation in the axial angle of the protruding shaft.
  • the cell structure can also be exploited to create damping or insulating in the end piece. Even a purely air-filled end piece will insulate, for example, from the evaporation of heat in a dryer cylinder better than a solid-cast end piece. By arranging the end piece to be gas-tight, other gases or a mixture of them can be used. On the other hand, when using solid or foam materials, not only insulation but also effective damping will be created. For example, extruded foam can be easily led into the cell structure while the foam will fill even the smallest recesses evenly.
  • Figure 2 shows an end piece 11 filled with a foam-like material 24.
  • a damping and/or insulating material is arranged in the space delimited by the end plate, the inner piece, and the plate piece, which is impossible in the prior art.
  • the foam adheres to the delimiting parts, it will further reinforce the structure of the end piece.
  • Figure 3 shows a combination of the embodiments described above, in which two plate pieces 19 and 22 are used, but with the conical angle opening towards the shell.
  • the use of the conical end piece 11 reduces by nearly half the free length of the protruding shaft 14.
  • the protruding shaft 14 shown extends through the bearing arrangement 12 and has a keyway 25 for a drive motor or gearbox.
  • rope threading is used in addition, to carry the web-threading tail through the web forming machine when starting production.
  • a rope sheave is used in connection with many rolls, and carries the rope according to the shell.
  • the roll according to the invention includes a rope sheave, which is arranged to extend axially from the free length of the protruding shaft to the end plate. According to Figure 3 , the plate piece 19 then remains inside the rope sheave 26. On the other hand, some conventional rope sheave can be used in connection with the roll shown in Figure 4 .
  • the rope sheave 26 includes a bearing 27, which is arranged around the protruding shaft 14, but mechanically separate from it.
  • the rope sheave thus has its own bearing, the inner ring of which is fitted around, but separate from the protruding shaft.
  • the inner ring 28 of the bearing 27 thus does not move and is here supported by a separate support 29 on the plinth 30 of the bearing arrangement 12.
  • In the outer ring 31 of the bearing 27 there are correspondingly attachment bolts 38, by means of which the sheet-material rope sheave 26 is attached to the bearing 27.
  • various rope sheaves of different sizes can be attached to the bearing. Thanks to the separate bearing, between tail threadings, the rope and the rope sheave with it can rotate at a crawl while the roll rotates at production speed. This saves energy and particularly the rope and the bearing of the rope sheave.
  • the part of the rope sheave 26 shaped according to the end piece 11 is a spun plate part 32.
  • the plate part 32 includes a roll-formed portion 33 having a groove 35 for the rope.
  • the portion 33 is of the same sheet material as the plate part 32 or the separate additional part 34 attached to the plate part 32.
  • the groove 35 for the rope is finally formed by roll forming in the spun plate part 32.
  • the diameter of the rope sheave is about 450 mm.
  • Figure 6 shows another embodiment of the rope sheave, which is intended particularly for large rope sheaves.
  • a separate roll-formed additional part 34 is used, being attached to the spun plate part 32.
  • Figure 6 shows two plate parts 32 and 32', the inner one of which can even be omitted in practice.
  • Radial support plates can be used to stiffen the rope sheave.
  • the support plates 36 are attached to the outer plate part 32.
  • the rope sheave shown is designed with a diameter of 1830 mm and the plate parts 32 and 32' used in it have a thickness of 2 - 3 mm. Thus even a large rope sheave will be light, but stiff.
  • the mass of the rope sheave according to the invention is only one quarter of that of known rope sheaves.
  • the smooth shape and closed structure effectively prevent dirtying of the rope sheave.
  • the rope sheave according to the invention can also be used in connection with rolls equipped with conventional end pieces.
  • the roll When using an end piece according to the invention in the manufacture of a new roll, the roll can be dimensioned for a higher rotation speed than previously, without vibration problems.
  • the end piece according to the invention can also be placed in existing rolls.
  • the roll is first detached from the web forming machine, after which the end pieces are removed from the shell. End pieces according to the invention are then attached to the shell and finally the roll is reattached to the web forming machine.
  • the roll prior to installation the roll can be balanced and, for example, surfaced.
  • a roll which can be rotated at a higher speed than before, is created rapidly and economically. Thus in rebuilds the replacement of the end pieces will be sufficient, assuming that the other components, such as the drive motors and bearing arrangements are suitable for increasing the speed.
  • the end pieces are attached to the shell and the roll is installed in the web forming machine.
  • the vibration of a new or refurbished roll can be brought under control, for example, by minimizing deflection.
  • the length of the protruding shaft has been clearly shortened by arranging the plate piece to be conical and by extending the inner piece of the plate piece from the end opposite to the end plate. This creates a triangular cell structure, which is stiff and additionally supports the protruding shaft effectively.
  • the properties of the end piece can be further altered or improved by arranging damping and/or insulation in the end piece.
  • Figure 2 shows in addition a feed-through pipe 37, through which leads to measuring devices, for example, can be taken inside the roll.
  • measuring devices or their auxiliary devices, such as telemetric devices' transmitters (not shown) inside the cell structure.
  • the cast parts for example, the inner piece and the protruding shaft, are made by traditional methods by casting and machining. In the manufacture of the plate piece, however, laser cutting, spinning, and/or roll-forming are used. In manufacture, it is even possible to use thin sheet material, with a thickness of less than 3 mm. Besides being shapable, sheet material can be laser-welded with good results.
  • the plate piece is indeed attached to the inner piece and to the end plate by laser-welding. The weld point is shown by small arrows in Figures 2 and 4 .
  • the plate piece can also be made from several different parts by welding, though it is preferably to make small plate pieces from a single sheet.
  • the methods described above are also applied in the manufacture of the rope sheave, which rope sheave is attached by bearings separately from the protruding shaft. The vibration of a totality created in this manner will be small and the rope sheave will be precisely supported.
  • the roll according to the invention and particularly its end piece is light but stiff compared to a corresponding cast piece.
  • the dimensioned speed of a roll can be increases by as much as 5 - 20 %.
  • the specific frequency of the roll then increases, when its vibration sensitivity decreases. In tested rolls, the specific frequency has increased by 5 - 10 %, in some cases by as much as 20 %.
  • the protruding shaft can be selected with more freedom than before, so that it is possible to use smaller shaft diameters than previously. At the same time, the choice of bearing becomes freer.
  • the cellular end piece is considerably cheaper to manufacture than a cast piece while it can incorporate damping, insulation, or both.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (9)

  1. Cylindre pour une machine formant des bandes, lequel cylindre comprend une coque (10) avec des pièces d'extrémité (11) à ses deux extrémités pour supporter le cylindre de façon rotative dans des dispositifs à paliers de la machine formant des bandes, lesquelles pièces d'extrémité (11) sont agencées pour être attachées de façon détachable à chaque extrémité de la coque (10), chacune des pièces d'extrémité (11) comportant une plaque d'extrémité (13) pourvue d'un arbre saillant (14) pour le support dans un dispositif de palier (12), caractérisé en ce que la pièce d'extrémité (11) comprend une pièce intérieure séparée (17), pourvue d'un alésage interne (18) correspondant à l'arbre saillant (14) pour la fixation, la plaque d'extrémité (13) étant supportée par la pièce intérieure (17) par au moins une plaque (19), en ce qu'un trou d'installation (20) est ménagé dans la plaque d'extrémité (13) pour la pièce intérieure (17), et la plaque (19) est agencée pour s'étendre vers l'extrémité opposée de la pièce intérieure (17) et vers la plaque d'extrémité (13), et en ce que la plaque (19) est disposée de façon conique, l'angle du cône a étant compris entre 45 et 140° et de préférence entre 55 et 130°.
  2. Cylindre selon la revendication 1, caractérisé en ce que la plaque d'extrémité (13), l'arbre saillant (14) et la pièce intérieure (17) sont des corps de révolution usinés séparément.
  3. Cylindre selon la revendication 1 ou 2, caractérisé en ce que la plaque (19) est agencée de telle façon que la plaque d'extrémité (13) et la pièce intérieure (17) sont coaxialement relatives l'une par rapport à l'autre dans la pièce d'extrémité (11).
  4. Cylindre selon l'une quelconque des revendications 1 - 3, caractérisé en ce que la pièce d'extrémité (11) comprend une seconde plaque (22) qui est agencée comme partie de la plaque d'extrémité (13).
  5. Cylindre selon l'une quelconque des revendications 1 - 4, caractérisé en ce qu'un matériau d'amortissement et/ou d'isolation (24) est disposé dans l'espace délimité par la plaque d'extrémité (13), la pièce intérieure (17) et la plaque (19).
  6. Cylindre selon l'une quelconque des revendications 1 - 5, caractérisé en ce que le cylindre comprend une poulie à câble (26) qui est agencée pour s'étendre axialement sur la longueur libre de l'arbre saillant (14) vers la plaque d'extrémité (13).
  7. Cylindre selon la revendication 6, caractérisé en ce que la poulie à câble (26) comprend un palier (27) qui est disposé autour de l'arbre saillant (14), le palier (27) comportant une bague intérieure (28) qui est ajustée autour et qui est séparée de l'arbre saillant (14), le palier (27) ayant une bague extérieure (31) à laquelle la poulie à câble (26) est attachée.
  8. Cylindre selon la revendication 6 ou 7, caractérisé en ce que la poulie à câble (26) est faite d'une feuille de métal et comporte une partie de plaque (32), la partie de plaque (32) comportant une gorge (35) pour le câble.
  9. Cylindre selon la revendication 8, caractérisé en ce que la partie de plaque (32) comprend une partie en forme de cylindre (33) pour le câble, laquelle partie (33) étant réalisée avec la même feuille de métal que la partie de plaque (32), ou est une partie additionnelle séparée (34) attachée à la partie de plaque (32).
EP05756310A 2004-07-28 2005-06-22 Cylindre de machine formant des bandes Expired - Lifetime EP1771622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20045280A FI117641B (fi) 2004-07-28 2004-07-28 Tela rainanmuodostuskonetta varten ja menetelmä vastaavan telan valmistamiseksi
PCT/FI2005/050231 WO2006010793A2 (fr) 2004-07-28 2005-06-22 Cylindre de machine formant des bandes et procede de fabrication dudit cylindre

Publications (2)

Publication Number Publication Date
EP1771622A2 EP1771622A2 (fr) 2007-04-11
EP1771622B1 true EP1771622B1 (fr) 2011-01-19

Family

ID=32749271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05756310A Expired - Lifetime EP1771622B1 (fr) 2004-07-28 2005-06-22 Cylindre de machine formant des bandes

Country Status (5)

Country Link
EP (1) EP1771622B1 (fr)
AT (1) ATE496168T1 (fr)
DE (1) DE602005026010D1 (fr)
FI (1) FI117641B (fr)
WO (1) WO2006010793A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2791413A1 (fr) * 2011-12-14 2014-10-22 Voith Patent GmbH Dispositif permettant de fabriquer une bande de matériau

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246401A (en) * 1963-12-10 1966-04-19 Huyck Corp Rotary drying drum
DE8703410U1 (de) * 1987-03-06 1987-05-21 J.M. Voith Gmbh, 7920 Heidenheim Trockenzylinder od.dgl. einer Papier-, Karton- oder Streichmaschine
FI101000B (fi) * 1995-10-05 1998-03-31 Valmet Corp Menetelmä ja laite paperiradan päänviennissä
DE19542191C2 (de) * 1995-11-13 1999-03-11 Voith Sulzer Finishing Gmbh Papierkalander

Also Published As

Publication number Publication date
ATE496168T1 (de) 2011-02-15
WO2006010793A2 (fr) 2006-02-02
FI20045280A0 (fi) 2004-07-28
FI117641B (fi) 2006-12-29
FI20045280L (fi) 2006-01-29
WO2006010793A3 (fr) 2006-05-04
EP1771622A2 (fr) 2007-04-11
DE602005026010D1 (de) 2011-03-03

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