EP0440140A2 - Rouleau pour appareil de lissage ou calandre - Google Patents

Rouleau pour appareil de lissage ou calandre Download PDF

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Publication number
EP0440140A2
EP0440140A2 EP91101085A EP91101085A EP0440140A2 EP 0440140 A2 EP0440140 A2 EP 0440140A2 EP 91101085 A EP91101085 A EP 91101085A EP 91101085 A EP91101085 A EP 91101085A EP 0440140 A2 EP0440140 A2 EP 0440140A2
Authority
EP
European Patent Office
Prior art keywords
roller
heat transfer
roll
heat
channels
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.)
Granted
Application number
EP91101085A
Other languages
German (de)
English (en)
Other versions
EP0440140B1 (fr
EP0440140A3 (en
Inventor
Heinz-Michel Dr. Zaoralek
Erich Vomhoff
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive 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 Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Publication of EP0440140A2 publication Critical patent/EP0440140A2/fr
Publication of EP0440140A3 publication Critical patent/EP0440140A3/de
Application granted granted Critical
Publication of EP0440140B1 publication Critical patent/EP0440140B1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers

Definitions

  • the present invention relates to a roller for a calender or a calender according to the preamble of claim 1.
  • Such rollers are used for the production and processing of material webs, in particular for smoothing paper webs.
  • Rolls of large dimensions in which a heat transfer medium is guided through bores (peripheral bores) running directly below the surface of the roller body are becoming increasingly important in recent times. This makes it possible to keep the path of heat from the heat transfer medium to the roll surface through the roll wall short and to enable effective heat transfer.
  • Comparable rollers of conventional diameter can be found in DE-GM 84 36 546, DE-GM 84 10 839 and EU-OS 158 220 based on the two utility models.
  • This has a roller body, peripheral bores on the roller body for the flow of a fluid heat transfer medium, a flange pin for each end of the roller body, supply and discharge lines for the fluid heat transfer medium in at least one flange pin and recesses for the distribution of the fluid heat transfer medium from the supply lines to the peripheral holes and from the peripheral holes to the discharge lines.
  • the inner bore is filled with the heat transfer fluid during operation. This is not only expensive, but also has to be heated each time the calender is started and cooled each time it is shut down. This is not only a waste of energy, but also means an extension of the corresponding heating and cooling processes and thus an extension of the operational readiness.
  • the residual stress distribution of the chilled cast iron rolls changes in such a way that the tensile residual stresses increase in the bore wall.
  • This is certainly desirable for high-performance heating operation, since the superimposed thermal stress is the reverse of the distribution of the residual stress and the stress level is reduced when the two stress distributions are superimposed.
  • the temperature increase in the outer roller shell due to the hot heat transfer medium in the peripheral bores only follows the temperature increase in the inner roller shell with a certain delay. This applies in the same way to the expansion of the roller material at the points listed. Due to the faster expanding roller material of the shell, the roller bore is put under additional tension. Knowing this connection, the permissible heating speeds are therefore greatly restricted, e.g. to 0.5 ° C per minute. This means a significant increase in waiting times until operational readiness.
  • the heating-up time starting from 20 ° C room temperature, takes almost eight hours.
  • roller according to the invention further axial bores with a small diameter are provided near the inner bore, which has an enlarged diameter, in which a heat or cold medium for tapping, through which the Carrier medium has been introduced into the roller, flows back.
  • the carrier liquid Since the rollers in question are generally driven rollers, the carrier liquid must be returned to the relevant pin after being introduced through the inlet pin and flowing through the peripheral bores and removed via double sealing heads. The other pin is not available for this because it is required to drive the roller.
  • the additional axial bores of small diameter that are additionally provided are very advantageous for returning the heat transfer fluid to the inlet spigot, since on the one hand this eliminates the usually regularly provided central roller bore and on the other hand additional weight savings are possible.
  • a displacer provided in the inner bore with its enlarged diameter in the roller is usually shrunk into the roller body.
  • the roller body is raised to a temperature which entails a certain increase in the diameter, in particular the inner diameter, of the roller.
  • the displacement body is then pushed into the central bore of the roller body.
  • the displacer is either a tube welded at both ends or an open tube at both ends, which is sealed with closures after the shrinking process. When the roller body is subsequently cooled, the roller body presses firmly against the displacement body.
  • the displacement body can be completely dispensed with.
  • This measure has the valuable advantages that the roller according to the invention can be manufactured much more easily and in a shorter time.
  • the total weight of the roller can be reduced further as a result.
  • the reliability of the roller in terms of tightness also increases.
  • the heat or coolant initially flows through the central hole of the inlet pin into the roller and passes through connecting channels preferably to every third of the peripheral bores and flows through them in the axial direction along the roller.
  • the carrier medium flows through connecting channels into an adjacent peripheral bore or into one of the other axial bores of small diameter.
  • the carrier medium can be passed axially several times through the roller body before it is disposed of via the further axial bores of small diameter and the subsequent entry pin. The disposed carrier medium is then brought back to the desired temperature outside the roller and fed to the roller again.
  • the inlet pin is usually provided with a double sealing head.
  • three peripheral channels are connected to one another and to one of the further axial channels or bores for returning the carrier medium near the central bore.
  • the radial arrangement of the peripheral channels or bores compared to the other axial bores has the advantage that the thermal compressive stresses in the interior of the roll are further reduced can be. This can be justified as follows: Because heat is removed from the surface of the roller, the heat transfer fluid also cools down during the repeated passage through the peripheral bores. With the triple-pass version listed above, the heat transfer fluid has reached its lowest temperature in the heating roller. Due to the return via the further axial bores in the inner roll area, the heat transfer medium warms up again somewhat due to the higher average temperature of the roll.
  • both the radially inner and the radially outer regions of the roller body are simultaneously brought to the desired temperature during the heating phase. Thermal stresses from temporary temperature differences are avoided from the outset. This enables much faster heating times. Calculations have shown that it is possible to increase the heating rate to 4 ° C per minute. The heating-up time is reduced to just under an hour.
  • FIG 1 shows an embodiment of the roller according to the invention, which is generally identified by reference number 10.
  • the roller 10 is provided with an enlarged central bore which is completely filled with a displacer 4.
  • the roller body 1 of the roller 10 is provided with peripheral channels or bores 6 near the roller surface.
  • the peripheral channels 6 are connected to further axial channels or bores 7 via connections 6c. These further axial bores 7 are in turn connected via an annular space 3 to the pin 2a, through which the heat transfer medium is introduced into the roller body 1 or disposed of therefrom.
  • Fig. 1 it is indicated in the drawing that instead of a displacer 4, the expanded central bore can also be easily welded closed, for example, with sealing caps 8, which enables the roller 10 to be manufactured more easily.
  • the heat transfer fluid is introduced into the roller body 1 via the inlet pin 2a.
  • the heat transfer fluid is supplied to the peripheral channels 6 via connections 6e.
  • the heat transfer fluid is then passed through the roller body 1 a further time either close to the roll surface or close to the surface of the enlarged central bore.
  • the cooled or used heat transfer fluid is disposed of from the roller 10 via the inlet pin 2a in order to be brought back to the desired temperature outside the roller.
  • the reference numeral 12 are fasteners, for. B. screws, bolts or the like, with which the displacer 4 is connected to the roller body 1 of the roller 10.
  • the connecting lines 6b allow fluid to be exchanged between adjacent peripheral channels 6.
  • the radially extending connecting lines 6c ensure the return of the heat transfer fluid from the peripheral channels 6 to the further axial channels 7.
  • the heat transfer fluid is passed through three peripheral channels 6 near the roller surface, in order to then be returned through an axial channel 7 near the surface of the enlarged central bore to the inlet pin 2a.
  • the cross section shown in FIG. 3 through the roller body according to FIG. 1 shows two sectional planes. The cuts are made at the end of the roller 10 at which the entry pin 2a is located.
  • Section AA shows essentially the same features as are shown from section CC in FIG. 2.
  • Connecting lines 6d are also radially extending Connecting lines 6d, which connect the further axial channels or bores 7 to the annular space 3, from which the cooled or used heat transfer fluid is returned to the inlet pin 2a.
  • the annular space 3 is connected to the return line 5.
  • the lower section B-B in FIG. 3 shows the connection of every third peripheral channel 6 to the heat carrier feed 9 via connecting lines 6b.
  • the peripheral bores 6 are connected to one another via connecting lines 6a.
  • the sectional graphic D-D clarifies along which the cut shown in FIG. 1 runs through the roller body 1 of the roller 10.
  • the heat transfer fluid After the heat transfer fluid has entered the roller body via the inlet pin 2a or the feed line 9 running through it (FIG. 1), the heat transfer fluid is introduced into every third peripheral channel 6 via the connecting lines 6e (FIG. 3).
  • the heat transfer fluid is now conveyed in the axial direction through the peripherally running channels 6 in order to be transferred at the roller end of the drive pin 2b (FIG. 2) via connecting lines 6a into adjacent peripheral channels 6.
  • the heat transfer fluid is again axially passed through the roller body 1 through this adjacent peripheral channel 6.
  • the heat transfer fluid is transferred once more via a circumferentially extending connecting line 6a into an adjacent peripheral bore.
  • the heat transfer fluid is passed on to the further axial bores 7 via radially extending connecting lines 6c (FIG. 1, FIG. 2). After the heat transfer fluid has passed through the further axial bores 7, it is conveyed into the annular space 3 via the radially inwardly extending connecting lines 6d. From the annular space 3, the cooled or used heat transfer fluid is passed via the disposal line 5 through the inlet pin 2a from the roller 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP91101085A 1990-01-29 1991-01-28 Rouleau pour appareil de lissage ou calandre Expired - Lifetime EP0440140B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002530 1990-01-29
DE4002530A DE4002530A1 (de) 1990-01-29 1990-01-29 Walze fuer ein glaettwerk oder einen kalander

Publications (3)

Publication Number Publication Date
EP0440140A2 true EP0440140A2 (fr) 1991-08-07
EP0440140A3 EP0440140A3 (en) 1992-01-15
EP0440140B1 EP0440140B1 (fr) 1994-06-08

Family

ID=6398980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101085A Expired - Lifetime EP0440140B1 (fr) 1990-01-29 1991-01-28 Rouleau pour appareil de lissage ou calandre

Country Status (3)

Country Link
EP (1) EP0440140B1 (fr)
DE (2) DE4002530A1 (fr)
FI (1) FI910383L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU679133B2 (en) * 1993-11-12 1997-06-19 Inverness Medical Switzerland Gmbh Assay methods and devices therefor
EP1094153A3 (fr) * 1999-10-19 2001-09-12 Walzen Irle GmbH Rouleau thermo-réglable, notamment rouleau chauffé pour calandre
CN110053313A (zh) * 2019-03-13 2019-07-26 抚顺东旭精工制辊科技有限公司 一种真空吸附瓦楞辊

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4407239A1 (de) * 1994-03-04 1995-09-07 Schwaebische Huettenwerke Gmbh Dampfbeheizte Walze
DE19513500C2 (de) * 1995-04-10 1998-05-14 Schwaebische Huettenwerke Gmbh Walze mit einstellbarer Form
DE19707876C2 (de) * 1997-02-27 2002-09-26 Voith Paper Patent Gmbh Walzenanordnung
DE29710040U1 (de) * 1997-06-09 1998-10-08 Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld Beheizbare Walze
FI105115B (fi) * 1998-12-02 2000-06-15 Valmet Corp Kuumennettava tela
DE102010044943A1 (de) * 2010-09-10 2012-03-15 Leonhard Breitenbach Gmbh Walze, insbesondere Kalanderwalze
EP3929353B1 (fr) * 2020-06-24 2023-05-10 Valmet Technologies Oy Rouleau thermique pour une machine de fabrication d'une bande de matière fibreuse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120867A (en) * 1961-07-27 1964-02-11 Nash John Crandon Heat exchange roll
EP0158220B1 (fr) * 1984-04-06 1992-12-16 Walzen Irle GmbH Cylindre pour calandre chauffé par un fluide de transfert de chaleur
DE3716223A1 (de) * 1987-04-02 1988-10-13 Schwaebische Huettenwerke Gmbh Beheizbare glaettwerk- oder kalanderwalze
DE9000980U1 (de) * 1990-01-29 1990-05-10 Schwäbische Hüttenwerke GmbH, 73433 Aalen Walze für ein Glättwerk oder einen Kalander

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU679133B2 (en) * 1993-11-12 1997-06-19 Inverness Medical Switzerland Gmbh Assay methods and devices therefor
EP1094153A3 (fr) * 1999-10-19 2001-09-12 Walzen Irle GmbH Rouleau thermo-réglable, notamment rouleau chauffé pour calandre
CN110053313A (zh) * 2019-03-13 2019-07-26 抚顺东旭精工制辊科技有限公司 一种真空吸附瓦楞辊

Also Published As

Publication number Publication date
EP0440140B1 (fr) 1994-06-08
DE4002530A1 (de) 1991-08-01
DE59101817D1 (de) 1994-07-14
EP0440140A3 (en) 1992-01-15
FI910383A7 (fi) 1991-07-30
FI910383L (fi) 1991-07-30
FI910383A0 (fi) 1991-01-25

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