EP1389693B1 - Rouleau chauffé et procédé de fonctionnement - Google Patents

Rouleau chauffé et procédé de fonctionnement Download PDF

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Publication number
EP1389693B1
EP1389693B1 EP20030016194 EP03016194A EP1389693B1 EP 1389693 B1 EP1389693 B1 EP 1389693B1 EP 20030016194 EP20030016194 EP 20030016194 EP 03016194 A EP03016194 A EP 03016194A EP 1389693 B1 EP1389693 B1 EP 1389693B1
Authority
EP
European Patent Office
Prior art keywords
roll
webs
radially
roller
journal
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 - Fee Related
Application number
EP20030016194
Other languages
German (de)
English (en)
Other versions
EP1389693A3 (fr
EP1389693A2 (fr
Inventor
Peter Dr. Wiemer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1389693A2 publication Critical patent/EP1389693A2/fr
Publication of EP1389693A3 publication Critical patent/EP1389693A3/fr
Application granted granted Critical
Publication of EP1389693B1 publication Critical patent/EP1389693B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating 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
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid

Definitions

  • US 2,531,988 shows a glass plate forming roll, which is formed as a cooling roller.
  • a roller body coaxially arranged as a tube core is arranged, which together with the roller body forms an annular gap.
  • the core tapers off conical at both ends.
  • the webs are perpendicular to each other.
  • DE 199 50 645 A1 describes a heated calender roll, which is easy to manufacture and should have a low weight.
  • a displacement body is arranged, which is held at both ends by supporting flange pin.
  • the displacement body is made of solid plastic, such as foam plastic, and has closed pores, wherein it is held by a press fit in the central bore of the roll body.
  • US Pat. No. 1,837,562 shows a roller for paper coating machines and the like, in which a roller body, a conical inner body is arranged, which forms with the roller body on the inside of a gap which increasingly narrows with increasing distance from the inlet of a heat transfer medium into the roller body. Behind the narrowest point a guide is arranged, which has a plurality of arcuate radially inwardly curved blades.
  • DE 41 11 911 A1 shows a roller with a hollow rotatable roller body having a roll shell and at least one of its two ends a hollow roll neck.
  • a guide body is arranged, which forms a channel system with the roll shell, which can be flowed through by a heat transfer medium.
  • the invention has for its object to drive the heat transfer medium with the least possible effort through the roller.
  • the guide means comprises a plate having a predetermined distance from the roll neck, wherein the webs between the roll neck and the plate are arranged and that the webs at their radially outer end in each case at a Holder and are fastened at its radially inner end in each case to a holder which extends between the roll neck and the plate.
  • the local orbital speed of a point on a rotating body decreases as it approaches the axis of rotation.
  • the guide means now ensures that the heat transfer medium is braked in the direction of rotation when it flows radially from outside to inside.
  • the rotational speed of the heat transfer medium is adapted to the rotational speed of the roller. This adaptation does not necessarily mean exact match. If the heat transfer medium has arrived in the region of the roll axis, where it can be removed from the roll, then theoretically it has no circulation speed, in practice, the rotational speed is very small. As a result, pressure losses are kept small.
  • the heat transfer medium can thus drive with a reduced pressure through the roller.
  • the roller body is formed as a tube and the guide means ends at a predetermined distance radially in front of the inner wall of the tube.
  • a gap between the guide means and the inner wall of the tube, which ultimately determines the thickness of a liquid film which flows through the roller.
  • Radially within the boundary, which is defined by this gap under certain circumstances, a dead water area inside the roll can result, so that essentially flows around the freshly flowing heat transfer medium, the inner wall of the tube. This results in a displacement effect.
  • the gap height ie the distance
  • the flow velocity of the heat transfer medium on the inner wall of the tube is higher, whereby the Nußelt number and thus the heat transfer is greater.
  • the webs fill a gap between the plate and the roll neck in the axial direction.
  • the entire heat transfer medium which enters the space between the plate and roll neck, braked on its way from outside to inside. A vortex formation is avoided.
  • the webs extend to radial rays to the roll axis. This is a particularly simple embodiment, but achieves a sufficient effect.
  • the holder is designed as a tube.
  • a tube provides a sufficiently large attack surface available, so that the webs can be reliably attached.
  • the tube may have a diameter which is greater than the thickness of a web, based on the circumferential direction of the roller. However, this plays no role in the management of the heat transfer medium in its path from the outside to the inside. The tube can thus seen seen in the direction of rotation of the roller quite one-sided or even on both sides over the respective associated web.
  • a fastening bolt is guided through at least one tube, which connects the plate with the roll neck. You can then use the pipe in addition to the attachment of the guide device on the roll neck.
  • a bracket, which is additionally connected to the roll neck, is a particularly stable abutment for the web.
  • the webs are attached at their radially inner end to a pipe.
  • This tube is arranged coaxially with the drainage channel through the roll neck.
  • This tube may, for example, enclose the outflow space, although this is not necessary. In this case, it may be appropriate to introduce holes in the wall of the tube, through which the heat transfer medium can flow. But you can also provide that the tube is shorter than the webs in the axial direction, so that an outflow cross section is kept free at one end face.
  • the webs are connected to a centering device which extends into a groove in the journal axially extending channel.
  • the centering device thus achieves centering of the guide device relative to the roller, more precisely the roll neck.
  • the centering must not necessarily be connected to all webs. If the centering device is designed as a plate with a trapezoidal shape, then it is sufficient if you connect the centering device, for example, with two opposing webs.
  • a guide device is arranged at both axial ends.
  • This training has several advantages. Firstly, it is no longer necessary in such an embodiment that the roller is installed with a predetermined orientation. The roller is largely symmetrical with respect to its axial center. On the other hand, an advantageous effect is achieved by the guide device even when flowing the heat transfer medium. The heat transfer medium is then accelerated by the guide means when flowing from the inside to the outside in the circumferential direction.
  • a compressed gas connection opens into the interior of the roller body.
  • a gas for example air
  • This gas can then displace the liquid to a certain extent, so that the roll behaves as if a displacer were installed.
  • the heat transfer fluid then flows helically from the inlet to the outlet.
  • the thickness of the liquid film can be predetermined by the gap width between the guide means and the inner wall of the roll body. If you displace the liquid from the interior, then the rotating mass is reduced.
  • a displacement body may be arranged in the interior of the roller body whose specific weight is not greater than the specific weight of the heat transfer medium.
  • This displacer no longer needs to be fixed in the roll body become. It centers itself when the roller is brought to a predetermined speed. The only prerequisite is that the specific gravity of the displacement body is smaller than that of the heat transfer medium.
  • a cylindrical body of sponge or polystyrene for the displacer.
  • the object is achieved in a method of the type mentioned above in that in addition to the heat transfer medium, a gas at a predetermined pressure in the hollow interior of the roller feeds.
  • the roller is first accelerated to a predetermined speed and then feeds the heat transfer medium.
  • the speed of the roller is chosen so that the heat transfer medium due to the centrifugal force to the inner wall of the roller applies and forms a liquid film there. It is therefore no longer dependent on filling the roller completely with the heat transfer medium.
  • the roll can be completely filled with a liquid heat transfer medium.
  • the guide means however, the residual air is removed after a few revolutions of the roller, so that the roller is completely filled with liquid and then shows no imbalance. Thus, an always reproducible stable filling state is established.
  • Fig. 1 schematically shows a roller 1 with a tube formed as a roller body 2, which carries an elastic coating 3.
  • the elastic covering 3 may for example be formed from a plastic.
  • roller body 2 At both axial ends of the roller body 2 each have a roll neck 4, 5 is arranged.
  • the roll neck 4, 5 have stub shafts 7, 8, with which the roller 1 can be rotatably mounted in a frame, not shown.
  • the stub shaft 7 is penetrated by an inflow 9, which opens into the interior 6.
  • the other stub shaft 8 is penetrated by an outflow channel 10, which also opens into the interior 6.
  • a heat transfer fluid can be fed into the interior 6.
  • the outflow channel 10 as indicated by a further arrow 12, the heat transfer fluid can flow out of the interior 6.
  • a compressed air connection 15 is provided, which is shown only schematically.
  • the compressed air connection 15 it is possible to feed compressed air into the interior 6 of the roller 1. Since the roller 1 can rotate, the compressed air connection 15 is in a rotary feedthrough 16 shown only schematically.
  • a guide device 17 is arranged, which in connection with the FIGS. 2 and 3 will be explained in more detail.
  • a structurally identical guide device 18 is arranged behind the inflow channel 9.
  • the guide device 17 is arranged in the region of the outflow-side roll neck 5 and concentrically attached to it, so that there is a gap 19 between the guide means 17 and the inner wall 14 of the roll body 2. This gap 19 substantially determines the thickness of the film 13.
  • the guide device 17 has a plate 20 which is arranged at a predetermined distance from the roll neck 5. At the roll neck 5 is a mounting ring 21 at. Between the plate 20 and the mounting ring 21 extending in the radial direction a plurality of webs 22. As out Fig. 3 This results in a total of eight webs, which are circumferentially spaced by 45 ° from each other.
  • the webs are formed rectangular in principle. However, they have a bevelled corner 23.
  • the chamfered corners 23 together form a discharge space 24.
  • This outflow space 24 extends in the radial direction about as far as the diameter of the outflow 10th
  • a tube 25 is connected to the plate 20.
  • the inner ends of the webs 22 are also connected to the tube 25.
  • the tube 25 thus forms a holder for the radially inner ends of the webs 22nd
  • the radially outer ends of the webs 22 are also connected to a respective tube 26.
  • the tube 26 has a diameter which is greater than the thickness of the webs. In the circumferential direction of the roller 1, the tubes 26 are thus on the left and right over the webs 22 via.
  • the tubes 26 connect the plate 20 with the mounting ring 21. You can be welded to both the plate 20 and with the mounting ring 21. Also, the webs 22 may be welded to the tubes 26.
  • the tubes 26 also serve to receive fastening bolts 27, with which the guide device 17 is screwed to the roll neck 5. This ensures that the webs 22 are held very reliable at its radially outer end. So you can record relatively high loads.
  • the webs 22 fill the space between the roll neck 5 and the mounting ring 21 and the plate 20 in the axial direction completely, ie they act upon a liquid that moves into the space between the plate 20 and the fixing ring 21 completely. Vortexes are avoided.
  • a centering device 28 has the shape of a trapezoid in cross-section, i. the centering device 28 is a plate with bevelled sides 29, which is inserted into the outflow channel 10. When the guide device 17 is applied to the roll neck 5, this is done automatically centering.
  • the guide device 18 is basically the same structure. A more detailed explanation can therefore be omitted.
  • the operation of the guide device 17 can be briefly described as follows:
  • the heat transfer fluid from the film 13 is fed through the gap 19 between the guide device 17 and the inner wall 14 of the roller body 2 in a gap 30 which is formed between two circumferentially adjacent webs 22. If the liquid is then pressed radially further inward, it is decelerated by the webs 22, i. their speed in the direction of rotation decreases, so that it is so small on reaching the outflow space 24 that the liquid can flow out without any significant pressure losses through the discharge channel 10. In this way one avoids the emergence of a spin-free fluid vortex (potential vortex).
  • the feeding takes place the heat transfer fluid through the guide device 18 directly to the roll shell 2, ie the inner wall 14, whereby a better temperature control of the roll body 2 is achieved.
  • the guide means 17, 18 is formed in the interior 6, a larger Totwasser which so that substantially the freshly flowing heat transfer fluid flows around the inner wall 14. The flow rate of the heat transfer fluid is higher on the inner wall 14, whereby the Nußelt number and thus the heat transfer is greater.
  • the thickness of the liquid film 13 can be predetermined by the width of the gap 19 with good approximation.
  • the displacer 31 only needs to be roughly fixed in the axial direction. In the radial direction attachment is not required, i. the displacer 31 does not have to be centered.
  • the only requirement is that its specific gravity is less than the specific gravity of the heat transfer fluid.
  • the displacement body 31 is formed as a cylindrical body made of a sponge or polystyrene.
  • the outer diameter of the displacement body 31 must be smaller than the inner diameter of the roller body.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)

Claims (17)

  1. Rouleau (1) pouvant être ajusté en température, comprenant un corps de rouleau (2) et un tourillon de rouleau respectif (4, 5) sur chaque extrémité axiale du corps de rouleau (2), un chemin d'écoulement pour un fluide caloporteur étant prévu à travers le rouleau (1), lequel s'étend dans une première portion radialement de l'intérieur vers l'extérieur, dans une deuxième portion axialement à travers le corps de rouleau et radialement sous sa surface périphérique et dans une troisième portion radialement de l'extérieur vers l'intérieur, et un dispositif de guidage (17) étant disposé dans la région de la troisième portion, lequel adapte la vitesse locale du fluide caloporteur dans la direction périphérique pour chaque distance radiale de l'axe du rouleau à la vitesse locale du rouleau dans la direction périphérique, et présente plusieurs ailettes (22) qui s'étendent radialement de l'intérieur vers l'extérieur, caractérisé en ce que le dispositif de guidage présente une plaque (20) avec une distance prédéterminée au tourillon de rouleau (5), les ailettes (22) étant disposées entre le tourillon de rouleau (5) et la plaque (20), et les ailettes (22) étant fixées à leur extrémité radialement externe à chaque fois à une fixation (26) et à leur extrémité radialement interne à chaque fois à une fixation (25) qui s'étend entre le tourillon de rouleau (5) et la plaque (20).
  2. Rouleau selon la revendication 1, caractérisé en ce que le corps de rouleau (2) est réalisé sous forme de tube et le dispositif de guidage (17) se termine à une distance prédéterminée radialement depuis la paroi interne (14) du tube.
  3. Rouleau selon la revendication 2, caractérisé en ce que les ailettes (22) remplissent un espace intermédiaire entre la plaque (20) et le tourillon de rouleau (5) dans la direction axiale.
  4. Rouleau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les ailettes (22) s'étendent sur des rayons radiaux par rapport à l'axe du rouleau.
  5. Rouleau selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la fixation (26) est réalisée sous forme de tube.
  6. Rouleau selon la revendication 5, caractérisé en ce qu'un boulon de fixation (27) est guidé à travers au moins un tube, qui relie la plaque (20) au tourillon de rouleau (5).
  7. Rouleau selon l'une quelconque des revendications 1 à 6, caractérisé en ce que, du côté des ailettes (22) tourné vers le tourillon de rouleau (5), on dispose une bague de fixation (21) entre le tourillon de rouleau (5) et les ailettes (22).
  8. Rouleau selon l'une quelconque des revendications 1 à 7, caractérisé en ce que les ailettes (22) laissent un espace d'évacuation (24) libre à leur extrémité radialement interne.
  9. Rouleau selon la revendication 8, caractérisé en ce que les ailettes (22) sont fixées à leur extrémité radialement interne à un tube (25).
  10. Rouleau selon la revendication 8 ou 9, caractérisé en ce que les ailettes (22) présentent, à leur extrémité radialement interne, un coin chanfreiné (23).
  11. Rouleau selon l'une quelconque des revendications 1 à 10, caractérisé en ce que les ailettes (22) sont connectées à un dispositif de centrage (28) qui s'étend dans un canal (10) s'étendant axialement dans un tourillon de rouleau (5).
  12. Rouleau selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'on dispose un dispositif de guidage (17, 18) aux deux extrémités axiales.
  13. Rouleau selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'un raccord de gaz sous pression (15) débouche dans l'espace interne (6) du corps de rouleau (2).
  14. Rouleau selon l'une quelconque des revendications 1 à 13, caractérisé en ce que l'on dispose dans l'espace interne (6) du corps de rouleau (2) un corps de déplacement (31), dont le poids spécifique n'est pas supérieur au poids spécifique du fluide caloporteur.
  15. Procédé pour faire fonctionner un rouleau (1) pouvant être ajusté en température selon l'une quelconque des revendications 1 à 14, dans lequel un fluide caloporteur est guidé à travers le rouleau (1) radialement en dessous de sa surface périphérique et est ressorti à travers un tourillon de rouleau (4, 5), la vitesse locale du fluide caloporteur dans la direction périphérique pour chaque distance radiale de l'axe du rouleau étant adaptée à la vitesse locale du rouleau dans la direction périphérique , caractérisé en ce que l'on injecte en outre au fluide caloporteur un gaz à une pression prédéterminée dans l'espace interne creux du rouleau.
  16. Procédé selon la revendication 15, caractérisé en ce que l'on accélère d'abord le rouleau (1) à une vitesse de rotation prédéterminée et ensuite on injecte le fluide caloporteur.
  17. Procédé selon la revendication 15 ou 16, caractérisé en ce que l'on remplit complètement le rouleau (1) avec un fluide caloporteur liquide.
EP20030016194 2002-08-16 2003-07-17 Rouleau chauffé et procédé de fonctionnement Expired - Fee Related EP1389693B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10237632 2002-08-16
DE2002137632 DE10237632B4 (de) 2002-08-16 2002-08-16 Temperierbare Walze und Verfahren zu ihrem Betrieb

Publications (3)

Publication Number Publication Date
EP1389693A2 EP1389693A2 (fr) 2004-02-18
EP1389693A3 EP1389693A3 (fr) 2005-12-14
EP1389693B1 true EP1389693B1 (fr) 2008-03-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030016194 Expired - Fee Related EP1389693B1 (fr) 2002-08-16 2003-07-17 Rouleau chauffé et procédé de fonctionnement

Country Status (2)

Country Link
EP (1) EP1389693B1 (fr)
DE (2) DE10237632B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015108A (zh) * 2012-12-19 2013-04-03 苏州博杰思达机械有限公司 烫光机的烫光机构

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400409A (zh) * 2011-09-28 2012-04-04 大连明珠机械有限公司 纸机压光机用热压光辊
CN103015109B (zh) * 2012-12-19 2014-08-13 苏州博杰思达机械有限公司 烫光机的烫光装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837562A (en) * 1929-03-16 1931-12-22 Charles W Mayer Cylinder for paper coating machines and the like
US2531988A (en) * 1946-03-13 1950-11-28 Pittsburgh Plate Glass Co Plate glass sizing roll
US3887250A (en) * 1970-03-06 1975-06-03 Vepa Ag Godet for use in drawing apparatus and drum dryer units
JPS57120720A (en) * 1981-01-20 1982-07-27 Mitsubishi Heavy Ind Ltd Cooled roll
DE4111911A1 (de) * 1991-04-12 1992-10-15 Voith Gmbh J M Walze
DE19812149A1 (de) * 1998-03-20 1999-09-23 Heidelberger Druckmasch Ag Kühlwalze
DE19824542B4 (de) * 1998-06-03 2005-07-14 Voith Paper Patent Gmbh Walze, Kalander und Verfahren zum Betrieb einer Walze
DE19950645A1 (de) * 1998-11-26 2000-06-08 Walzen Irle Gmbh Beheizte Kalanderwalze
FI108252B (fi) * 2000-10-05 2001-12-14 Metso Paper Inc Menetelmä ja laite paikallisten lämpökuormien tasaamiseksi

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015108A (zh) * 2012-12-19 2013-04-03 苏州博杰思达机械有限公司 烫光机的烫光机构
CN103015108B (zh) * 2012-12-19 2014-08-13 苏州博杰思达机械有限公司 烫光机的烫光机构

Also Published As

Publication number Publication date
DE10237632A1 (de) 2004-03-04
EP1389693A3 (fr) 2005-12-14
DE50309449D1 (de) 2008-05-08
EP1389693A2 (fr) 2004-02-18
DE10237632B4 (de) 2004-11-11

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