EP0882838B1 - Calandre - Google Patents

Calandre Download PDF

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Publication number
EP0882838B1
EP0882838B1 EP98110349A EP98110349A EP0882838B1 EP 0882838 B1 EP0882838 B1 EP 0882838B1 EP 98110349 A EP98110349 A EP 98110349A EP 98110349 A EP98110349 A EP 98110349A EP 0882838 B1 EP0882838 B1 EP 0882838B1
Authority
EP
European Patent Office
Prior art keywords
roll
roller
calender
roll shell
intermediate rolls
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
EP98110349A
Other languages
German (de)
English (en)
Other versions
EP0882838A1 (fr
Inventor
Bernhard Dr. Brendel
Peter Dr. Svenka
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.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
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 Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Publication of EP0882838A1 publication Critical patent/EP0882838A1/fr
Application granted granted Critical
Publication of EP0882838B1 publication Critical patent/EP0882838B1/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
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a calender with a vertical roll stack according to the preamble of claim 1.
  • EP 0 735 185 A2 describes a calender for double-sided paper treatment known, which has a roll stack with eight rolls, of which the two middle rolls form an alternating gap.
  • One of the intermediate rolls is one Bending adjustment roller with inner jacket stroke, i.e. the coat as a whole is relative vertically displaceable to the roll core.
  • Bending adjustment rollers of this type are known for example in the form of NIPCO or HYDREIN rollers.
  • a material web to be treated passes through in such a calender the working gaps delimited in pairs by the rollers, which is usually based on the Anglo-Saxon Linguistic usage can be called nip.
  • nip is a web Forming work in the form of compressive stress and heat supplied to the Material web to give certain surface properties and, if necessary bring about a desired density.
  • the nips are preferred between a hard roller and one with an elastic cover provided roller, a so-called soft roller.
  • the dead weights create the ones above arranged rollers a resulting compressive stress that a predetermined Must not exceed the maximum.
  • the compressive stress is reduced in the individual nips from bottom to top according to their own weights each arranged above the nip in question Rollers. Since the compressive stress in the treatment of the paper web in the nip does the reshaping work, it would be desirable to do it individually Spread nips as evenly as possible. However, it turned out that the compressive stress distribution over the nip length in general is non-uniform. This problem of uneven compressive stress distribution has so far been provided by the upper and lower Deflection adjustment rollers and / or compensation of overhanging loads tried to solve.
  • overhanging weights must be compensated, otherwise vertical deformations of the intermediate rolls are caused, so that hanging edge parts of the rollers with increasing compressive stress on the Roll edges and the well-known M or W profiles in line load distribution arise with local compression of the web.
  • dead weights of overhanging loads such as from Known from US-A 3,060,843
  • attempts are made to eliminate these errors bend-free intermediate rolls and correspondingly straight, horizontal trending nips can be obtained.
  • relief forces are applied to the roll neck set, however, at a fixed with the roll neck connected roll core to a non-uniform bending of the roll shell can lead, with the result that the compressive stress effective in the nip across the length of the rolls (i.e. across the width of the calender) becomes non-uniform despite compensation of the overhanging loads.
  • EP 0 661 405 A1 describes a calender with a vertical roll stack known, which has an intermediate roller on which a hollow cylindrical Roll core is rotatably mounted. One between roller axis and The remaining space of the roller core can be used for the passage of a heating medium be used.
  • the roller axis is supported with its journals in intermediate roller bearings from attached to swivel arms of lever mechanisms are.
  • the complex additional lever mechanisms are disadvantageous.
  • the object of the invention is to provide a calender of the type mentioned the in a constructively simple way mistakes in the setting of a Nip geometry significantly reduced.
  • the intermediate roller according to the invention now enables the problem of deformation of intermediate rolls easily and reliably due to overhanging loads to fix.
  • the initiation of relief forces Compensation of the overhanging loads from the roll neck, roll axis and Guide means can therefore be omitted.
  • There is a significant advantage from this since the roller axis then in simple holders on a calender stand is attachable.
  • the elaborate lever mechanisms can omitted.
  • a hydrostatic inner support such as that is necessary with bending adjustment rollers.
  • the hollow cylindrical roller core is preferably based on each Spherical roller bearings on a roller axis, this spherical roller bearing prevent bending deformations on the hollow cylindrical roller core be transmitted. If the hollow cylindrical roller core is over hydrostatic supports vertically displaceable bearings on the roller axis a sensitive control of all on the roller axis and the hollow cylindrical Forces acting on the roller core can be achieved. Such camps can namely be pressurized, which is also sufficient, one Set the targeted edge-side bending of the hollow cylindrical roller core. You then have it in your hand, the compressive stress in the individual Any nips to choose, for example to increase the amount of line load change.
  • the rollers are not supported in the horizontal direction, except on the edge side, so that there are deformations caused, for example, by driving forces of a central drive, a non-uniform Nip trains.
  • this problem can be solved accordingly solve the applicant's previous proposal in P 196 50 576.3, that the torques are fed to the rollers, each defining a nip and the performance of the drive motors are regulated in such a way that the horizontal deformations of the rolls are minimized.
  • the nip geometry can be mastered, and none become Shear stresses over the paper web and the elastic roller covers transfer. This concept is also with the calender according to the present Invention applicable with advantage.
  • FIG. 1 and 2 schematically show an intermediate roller with a hollow cylindrical Roll core 10, the end of each via spherical roller bearings 12th is supported on a rotationally fixed roller axis 14.
  • the spherical roller bearings 12 allow the roll core 10 to rotate on the roll axis 14
  • Roller axis 14 is designed as a bar and is supported with roller pins 15 via spherical shells 16 directly in a holder 61 Calender stand 18 (see. Fig. 6, 7).
  • Means for a rotary drive the roll core 10 are not shown; preferably one will Use controlled synchronous or asynchronous motors that come from inverters be fed.
  • the spherical roller bearings 12 are not supported directly on the roller axis 14, but each sit on a backdrop 20, which is in the vertical direction is movably arranged on the roller axis 14.
  • the backdrop 20 For this purpose, it has a roller axis receptacle 21, which also includes the roller axis 14 Game 23, 23 'in the vertical direction takes up a thrust of the hollow cylindrical To enable roll core 10 to the roll axis 14, which is a Compensate for the influence of overhanging loads as well as a simple one Stand construction allows. It prevents deflections the roller axis 14 are transferred to the roller core 10.
  • the vertical displaceability of the roller core 10 relative to the roller axis 14 can be made adjustable such that according to one embodiment 3 and 4, the backdrop 20 by means of a hydrostatic support 22 is held, which completely eliminates the influence of overhanging loads is able to eliminate. There is also partial or full compensation or overcompensation of the dead weight of the hollow cylinder possible, which influences the level of the line load can.
  • the hydrostatic support 22 is fed via a Bore 24 in the roller axis 14. By means of return lines, not shown the hydraulic fluid can be returned.
  • FIG. 5 differs from that according to FIG. 3 and 4 by additional individual internal support on individual axially spaced roller core areas.
  • additional supports 30 are preferably in the region of the W points and are hydrostatic. For the sake of simplicity, this support is only provided by arrows 30 indicated.
  • the line force profile can be equalized in this way.
  • FIG. 6 is a schematic side view of a calender with five rolls, of which an intermediate roller 52, as described above for FIGS. 1 to 4, is trained.
  • This intermediate roller 52 is with its roller axis stored in the holder 61 held by the calender stand 18.
  • the bracket 61 is designed as a rigid bracket in which the roller axis is non-rotatably mounted.
  • Further intermediate rolls 50, 54 which are not designed as stated above, on the other hand, must be in Levers 60 are stored, the adjustment of a uniform Enable line load.
  • An upper roller 56 and a lower roller 58 are designed as deflection adjustment rollers.
  • Fig. 7 shows a calender according to Fig. 6, in which all intermediate rolls 50, 52, 54 can be formed according to FIGS. 1 to 4.
  • the roller axes the intermediate rolls are all rigidly clamped in brackets 61; the positioning of the roller cylinders or a separation of the rollers take place by means of the backdrop guide according to FIGS. 1 and 2, if necessary supported by the hydrostatic supports according to FIGS. 3 and 4.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Lubricants (AREA)

Claims (6)

  1. Calandre comprenant un empilement vertical de rouleaux qui comporte un rouleau supérieur de réglage de la flexion, un rouleau inférieur de réglage de la flexion et des rouleaux intermédiaires, et dans lequel au moins un des rouleaux intermédiaires présente un axe de rouleau bloqué en rotation sur lequel s'appuie, en tourillonnant sur lui, un noyau de rouleau cylindrique creux qui peut se déplacer dans la direction verticale, caractérisée en ce que le noyau de rouleau cylindrique creux (10) du rouleau intermédiaire (52) prend appui sur l'axe de rouleau (14) seulement aux extrémités et en pouvant se déplacer dans la direction verticale par rapport à cet axe, au moyen d'une coulisse.
  2. Calandre selon la revendication 1, caractérisée en ce que le noyau de rouleau cylindrique creux (10) prend appui sur les coulisses (20) au moyen de roulements oscillants (12).
  3. Calandre selon la revendication 2, caractérisée en ce que la coulisse (20) supporte des tourillons (15) d'un axe de rouleau (14) mobiles de façon réglable dans la direction verticale par rapport au noyau de rouleau cylindrique creux (10) au moyen d'un support hydrostatique (22).
  4. Calandre selon une des revendications 1 à 3, caractérisée en ce que le noyau de rouleau cylindrique creux (10) présente un appui intérieur ponctuel additionnel (30) dans différentes régions du noyau de rouleau qui sont espacées axialement.
  5. Calandre selon une des revendications 1 à 4, caractérisée en ce que l'axe (14) bloqué en rotation des rouleaux intermédiaires possédant un noyau de rouleau cylindrique creux (10) est tenu dans une monture (61) d'un bâti de calandre (18).
  6. Calandre selon une des revendications 1 à 5, caractérisée en ce que tous les rouleaux intermédiaires comprennent un noyau de rouleau cylindrique creux (10).
EP98110349A 1997-06-05 1998-06-05 Calandre Expired - Lifetime EP0882838B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19723519 1997-06-05
DE19723519A DE19723519A1 (de) 1997-06-05 1997-06-05 Kalander

Publications (2)

Publication Number Publication Date
EP0882838A1 EP0882838A1 (fr) 1998-12-09
EP0882838B1 true EP0882838B1 (fr) 2002-10-09

Family

ID=7831435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98110349A Expired - Lifetime EP0882838B1 (fr) 1997-06-05 1998-06-05 Calandre

Country Status (3)

Country Link
EP (1) EP0882838B1 (fr)
AT (1) ATE225880T1 (fr)
DE (2) DE19723519A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110695A1 (de) 2001-03-06 2002-09-12 Voith Paper Patent Gmbh Selbstanstellende Durchbiegungseinstellwalze
DE102008058444B4 (de) 2007-11-21 2020-03-26 Antacor Ltd. Verfahren und Verwendung einer Vorrichtung zur Herstellung von Brennstoffen, Humus oder Suspensionen davon

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH587690A5 (fr) * 1975-01-29 1977-05-13 Escher Wyss Ag
DE2919748C2 (de) * 1979-05-10 1983-08-18 Escher Wyss AG, Zürich Walzvorrichtung zum Walzen von bahnförmigen Materialien
US5329849A (en) * 1993-06-11 1994-07-19 Beloit Technologies, Inc. Self-loading controlled crown roll
FI96334C (fi) * 1993-11-24 1996-06-10 Valmet Paper Machinery Inc Menetelmä paperin tai vastaavan rainamateriaalin kalanteroinnissa ja menetelmää soveltava kalanteri
FI95062C (fi) * 1993-12-29 1995-12-11 Valmet Paper Machinery Inc Kalanteri
DE19511145C2 (de) * 1995-03-27 2000-07-13 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Papierbehandlung
DE19650576C2 (de) * 1996-12-06 2001-02-15 Kuesters Eduard Maschf Kalander

Also Published As

Publication number Publication date
EP0882838A1 (fr) 1998-12-09
DE59805869D1 (de) 2002-11-14
DE19723519A1 (de) 1998-12-10
ATE225880T1 (de) 2002-10-15

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