EP0697091A1 - Cylindre chauffe a la vapeur - Google Patents

Cylindre chauffe a la vapeur

Info

Publication number
EP0697091A1
EP0697091A1 EP95907648A EP95907648A EP0697091A1 EP 0697091 A1 EP0697091 A1 EP 0697091A1 EP 95907648 A EP95907648 A EP 95907648A EP 95907648 A EP95907648 A EP 95907648A EP 0697091 A1 EP0697091 A1 EP 0697091A1
Authority
EP
European Patent Office
Prior art keywords
steam
roller
bores
central bore
flange
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
EP95907648A
Other languages
German (de)
English (en)
Other versions
EP0697091B1 (fr
Inventor
Heinz-Michael Zaoralek
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 EP0697091A1 publication Critical patent/EP0697091A1/fr
Application granted granted Critical
Publication of EP0697091B1 publication Critical patent/EP0697091B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • D21F5/028—Heating the cylinders using steam
    • 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
    • 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

  • the invention relates to a steam-heated roller of the type described in the preamble of claim 1.
  • rollers For the treatment of web-shaped media, e.g. Paper, by pressing, drying and smoothing, rollers are used which have large diameters and are heated.
  • large means a diameter of at least 1,000 mm.
  • rollers are preferably heated from the inside by means of fluid heat transfer media, preferably with water, steam or thermal oil.
  • fluid heat transfer media preferably with water, steam or thermal oil.
  • the resulting increase in the surface temperature of the rollers either enables their function by causing the drying cylinders to evaporate the moisture in the paper web, or promotes their function because the water in the press is more easily removed from the paper web at elevated temperature and reduced viscosity can be squeezed out or because the plasticizability of the paper fibers increases at elevated temperature, as a result of which they can be smoothed more easily.
  • rollers cylindrical design If steam is used for heating, these are usually rollers cylindrical design.
  • the steam is usually conducted into the interior of the roller cylinder, where it condenses on the inside.
  • the condensate is led out of the roller via a siphon.
  • roller wall cannot be made as thin as desired, which would be desirable for good heat conduction of the heating energy to the heat transfer medium.
  • the heating steam is introduced into the peripheral bores from both roller ends.
  • part of the steam which flows through the sealing head into the heating-side pin is passed through the central bore in the roller body to the other side of the roller and from there into the associated ends of the peripheral bores.
  • this central bore is made with a diameter that is smaller than 150 mm. Then rollers in this regard do not fall under the relevant regulations in countries in which the US ASME regulations apply.
  • the advantage of such a roller according to the invention is, in particular, that the central bore of the roller body is kept completely free of heating steam, which means that there is no need to keep it smaller than 150 mm in diameter in order to comply with the relevant regulations, nor to take any measures. to prevent the prescribed flow area from becoming too large.
  • a further advantageous effect is that the branching of the connecting channels according to the invention now makes it possible to distribute the steam to all peripheral bores without substantial weakening of the roller body or the flange pin, in particular also in the case of rollers of larger dimensions with a large number of such bores.
  • the proposed roller is designed so that the connecting channels in a driver-side flange of the roller are arranged, which has an advantageous effect in that the short flow path for the heating steam to its destination entails only minor heat losses during transport.
  • a roller according to the invention can be designed in such a way that the connecting channels branch from the central bore in a first flange pin to every second peripheral bore, while the adjacent, intermediate holes are connected by passages in a second flange pin opposite.
  • a connecting channel is branched from the central bore to four mouths of the peripheral bores.
  • a connecting channel consists of a first bore, which leads from the central bore of the flange pin to the central bore of the roller, and which is made of a plurality of holes which are introduced into the flange pin from the mouth of the first bore on the roller body central bore second bores and again a plurality of bores connecting the ends of the second bores with a plurality of mouths of the peripheral bores, the mouth of the first bore being sealed against the central bore of the roller body.
  • connection channels can be carried out by suitable drilling of the flange pin, while a suitable branching of the various partial bores of the connection channels enables a wide branching of the first hole starting from the central bore. Since the individual bores can be freely selected within relatively large ranges of the axial and radial angles, it can be ensured that, despite a large number of bores in the peripheral flange area, there is no substantial weakening of the flange.
  • the mouth of the first bore which starts from the central bore of the flange and ends on the inside in the central bore of the roller body, is easy to seal there because the space required for this inside the roller is not required for other components and is not under pressure or is filled with a medium that damages the seals.
  • At least one annular collecting space is provided for the condensate accumulating in the bores.
  • This configuration can ensure that the condensate does not collect at undesirable points in its flow path and that the steam flow and the heat transfer are impeded.
  • central outlets which only slightly weaken the roller components can be made available in this way for the condensate of a plurality of peripheral bores.
  • the steam-heated roller can have siphons which connect the collecting space for discharging the condensate accumulated there and any blow-through steam to the mouth regions of the peripheral bores at their ends in the flange pin. This ensures rapid and effective removal of the condensate, the amount of condensate remaining extremely low in the roller.
  • the collecting spaces in the first and second flange journals can be connected to one another by axially parallel return bores.
  • the condensate and the blow-by steam can also be removed centrally on the side of the first flange pin.
  • the roller according to the invention is characterized in that the collecting space of the flange pin for discharging the condensate and any blow-through steam is connected via radial channels to a collecting space in the center of the flange pin, which in turn is connected to the outside of the roller via a double sealing head of the central bore.
  • This radial division of the return transport of the condensate has the advantage that the pressure difference from the peripheral bores to the central bore is also divided. Pressure equalization takes place in the collection rooms. The pressure difference from this point to the peripheral bores is offset by a pressure drop which is composed of a centrifugal force component and a flow resistance. If the centrifugal force component is so large that it alone corresponds to the pressure difference, a flow can no longer take place.
  • the pressure difference can be adjusted by the proposed design so that the flow resistance with pure steam flow is greater than the maximum possible resistance due to the centrifugal force, which arises when the content of the siphon is pure condensate, so no flow is possible. This ensures stable drainage.
  • An open connecting bore can preferably connect the central bore of the roller to the environment through a flange pin. This measure ensures that there is always ambient pressure in the roller, so that the roller itself can no longer be regarded as a pressure vessel and the interior can be designed for a large roller in such a way that relatively thin roller walls are present and thus a lightweight roller is produced.
  • a roller according to the invention can be designed such that a return pipe arranged centrally in the interior of the roller is provided for returning the condensate from the drive-side flange journal.
  • FIG. 1 shows a longitudinal section through a steam-heated roller with two screwed-on flanges
  • FIG. 2 shows a partially cut cross-section through a sector of the right flange of the roller shown in FIG. 1.
  • roller described in FIGS. 1 and 2 is driven on the flange 8 shown on the left in FIG.
  • connection channels for the steam are accommodated according to the invention as bores 4, 5, 6 in the driver-side pin 3.
  • the holes branch out according to the type of branch of a tree. If, for example, the 48 peripheral bores of a roller with an outer diameter of 1850 mm are to be supplied with steam which flows in through the central bore 16 of the journal, six radial bores 6 initially run from this central bore 16 obliquely inwards to the inner flange surface. From each outlet opening at this point, two blind holes 5 are then guided outwards into the journal flange. The flange is closed at these points by means of cover plates 17. At the ends of the now 12 blind holes, oblique connecting bores 4 are made in the journal flange by two peripheral bores. This means that every second of the 48 peripheral bores is supplied with steam. Instead of the openings on the inside of the peg closed by the covers 17, an annular channel could also be provided. This would then be closed with a ring instead of the cover 17.
  • connection of the adjacent holes which are still without steam supply, is carried out in such a way that a connection to the steam-carrying neighboring holes is made through passages 7 in the drive-side pin 8.
  • the amount of steam required in the holes connected in this way initially flows, as it were, as excess steam through the neighboring hole and then from the drive side.
  • the steam quantities are so small in relation to the peripheral bore cross-sections that an adequate steam supply is possible at low steam speeds.
  • the condensate drainage from the peripheral bores takes place via a small siphon tube 9 in the flange pin in the area of each end of the peripheral bores 2. This ensures a quick and effective removal of the condensate.
  • the amount of condensate in the roller remains extremely low, especially if you compare this construction with one of the usual steam-heated constructions.
  • the condensate - possibly together with a small percentage of blow-through steam - is pressed by the steam pressure against the centrifugal force radially towards the center of the roll into annular collecting spaces 10 at both ends of the roll. Distributed over the roller circumference, these collecting spaces are connected to one another by a plurality of axially parallel bores 11 in the roller body. Through these bores 11, the condensate gets back from the drive side to the driver side of the roller. A few radial connecting pipes 12, also in the manner of siphons, are then sufficient to guide the condensate into a central condensate collector 13 in the middle of the guide-side pin 13 and from there through the double sealing head Roller out.
  • the interior 14 of the roller can be kept free of steam and condensate in the manner described. This is ensured by a direct open bore 15 from the inside of the roll through the journal flange to the outside.
  • the roller body cannot therefore be regarded as a pressure vessel.

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)
  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un cylindre chauffé à la vapeur et un corps de cylindre (1) avec un espace creux central (14) et des espaces creux périphériques (2) parallèles à l'axe du cylindre pour le guidage de la vapeur et avec au moins un pivot à bride vissé (3) présentant un espace creux central (16) et des canaux de liaison (4, 5, 6) entre l'espace creux central (16) du pivot à bride (3) et les orifices des espaces creux périphériques (2) du corps (1) du cylindre au niveau du pivot à bride (3), lequel cylindre se caractérise par le fait que les canaux de liaison (4, 5, 6) se ramifient à partir de l'espace creux central (16) du pivot à bride (3) dans ce pivot à bride (3) sous la forme de plusieurs orifices des espaces creux périphériques (2).
EP95907648A 1994-03-04 1995-02-06 Cylindre chauffe a la vapeur Expired - Lifetime EP0697091B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4407239A DE4407239A1 (de) 1994-03-04 1994-03-04 Dampfbeheizte Walze
DE4407239 1994-03-04
PCT/EP1995/000420 WO1995023950A1 (fr) 1994-03-04 1995-02-06 Cylindre chauffe a la vapeur

Publications (2)

Publication Number Publication Date
EP0697091A1 true EP0697091A1 (fr) 1996-02-21
EP0697091B1 EP0697091B1 (fr) 1998-09-23

Family

ID=6511870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95907648A Expired - Lifetime EP0697091B1 (fr) 1994-03-04 1995-02-06 Cylindre chauffe a la vapeur

Country Status (8)

Country Link
US (1) US5655596A (fr)
EP (1) EP0697091B1 (fr)
JP (1) JPH09500956A (fr)
KR (1) KR960702094A (fr)
CA (1) CA2162178A1 (fr)
DE (2) DE4407239A1 (fr)
FI (1) FI955293A (fr)
WO (1) WO1995023950A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4404922C1 (de) * 1994-02-16 1995-09-28 Schwaebische Huettenwerke Gmbh Peripher gebohrte Walze zur Wärmebehandlung von Bahnmaterial
DE29510512U1 (de) * 1995-06-29 1996-10-31 Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld Beheizbare Walze
JP2971368B2 (ja) * 1995-08-04 1999-11-02 東洋鋼鈑株式会社 ラミネート板製造用の熱転写ロール、該熱転写ロールを使用した金属薄板の加熱方法及び該熱転写ロールを備えたラミネート板製造装置
DE19707876C2 (de) * 1997-02-27 2002-09-26 Voith Paper Patent Gmbh Walzenanordnung
US5899264A (en) * 1997-09-17 1999-05-04 Marquip, Inc. Steam supply and condensate removal apparatus for heated roll
US6032725A (en) * 1998-06-02 2000-03-07 Marquip, Inc. Rotary steam joint and valve assembly
FI105115B (fi) * 1998-12-02 2000-06-15 Valmet Corp Kuumennettava tela
US7025123B1 (en) * 1999-01-29 2006-04-11 Kimberly-Clark Worldwide, Inc. Fluid distribution system for thermal transfer rollers
EP1029976B1 (fr) * 1999-02-17 2002-07-24 Walzen Irle GmbH Rouleau
DE10023291A1 (de) * 2000-05-15 2001-11-22 Bhs Corr Masch & Anlagenbau Beheizbare oder kühlbare Walze zur Temperaturbehandlung von Materialbahnen, insbesondere zur Verwendung für Wellpappemaschinen
JP2002339950A (ja) * 2001-05-18 2002-11-27 Mitsubishi Heavy Ind Ltd 熱処理ロール
DE10239559B4 (de) * 2002-08-28 2016-09-29 Shw Casting Technologies Gmbh Walze für die thermomechanische Behandlung eines bahnförmigen Mediums
US6971174B2 (en) * 2003-01-08 2005-12-06 Alcoa Inc. Method of manufacturing a caster roll
DE10351515A1 (de) * 2003-11-05 2005-06-09 Voith Paper Patent Gmbh Walze zur thermischen Behandlung einer Materialbahn
DE102010044943A1 (de) * 2010-09-10 2012-03-15 Leonhard Breitenbach Gmbh Walze, insbesondere Kalanderwalze
WO2016086250A2 (fr) 2014-12-01 2016-06-09 Georg Michael Ickinger Cylindre de séchage sous forme de double cylindre coaxial avec interstice annulaire
DE102019120827A1 (de) * 2018-08-10 2020-02-13 Oerlikon Textile Gmbh & Co. Kg Galette

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR720913A (fr) * 1931-06-26 1932-02-25 Simmon Maschf Hans Dispositif tubulaire de transmission de chaleur
DE683932C (de) * 1937-12-24 1939-11-18 Kleinewefers Soehne J Heiz- und kuehlbare Walze, insbesondere fuer Papier- und Textilkalander
GB629385A (en) * 1945-10-16 1949-09-19 Lukens Steel Co Heat transfer drum
FR1541670A (fr) * 1966-04-28 1968-10-11 Skandinaviska Apparatind Rouleau à double paroi et procédé de fabrication
US3903961A (en) * 1973-11-08 1975-09-09 Morrison Machine Co Hot oil drum
US4459726A (en) * 1981-12-21 1984-07-17 Usm Corporation Temperature control for shell type rolls
US4506727A (en) * 1982-06-14 1985-03-26 Usm Corporation Converted temperature control roll
DE3242066A1 (de) * 1982-11-13 1984-05-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Kuehlwalze mit vorgewaehlten unterschiedlichen kuehlzonen
DE3586898D1 (de) * 1984-04-06 1993-01-28 Walzen Irle Gmbh Mittels eines waerme uebertragenden mediums beheizbare kalanderwalze.
AT390975B (de) * 1987-06-15 1990-07-25 Andritz Ag Maschf Vorrichtung mit einer mit einem waermetraegermedium beheizten arbeitsflaeche
DE3814794A1 (de) * 1988-05-02 1989-11-16 Kleinewefers Gmbh Beheizbare walze
DE3838726C3 (de) * 1988-11-15 1997-03-13 Schwaebische Huettenwerke Gmbh Heiz- oder Kühlwalze
DE3925367A1 (de) * 1989-08-01 1991-02-14 Kuesters Eduard Maschf Walze zur druck- und temperaturbehandlung von bahnfoermigem material
FR2654372B1 (fr) * 1989-11-16 1992-01-17 Siderurgie Fse Inst Rech Cylindre pour un dispositif de coulee continue sur un ou entre deux cylindres.
DE4002530A1 (de) * 1990-01-29 1991-08-01 Schwaebische Huettenwerke Gmbh Walze fuer ein glaettwerk oder einen kalander
DE9000980U1 (de) * 1990-01-29 1990-05-10 Schwäbische Hüttenwerke GmbH, 73433 Aalen Walze für ein Glättwerk oder einen Kalander
DE4036121C2 (de) * 1990-07-26 1997-06-12 Schwaebische Huettenwerke Gmbh Heizwalze
DE9014117U1 (de) * 1990-10-11 1992-02-06 Eduard Küsters Maschinenfabrik GmbH & Co KG, 4150 Krefeld Temperierbare Walze
DE4203550C2 (de) * 1992-02-07 1995-07-13 Koenig & Bauer Ag Drehzuführung für druckbeaufschlagbare Medien auf rotierbare Körper
DE9306176U1 (de) * 1993-04-23 1993-07-01 Schwäbische Hüttenwerke GmbH, 7080 Aalen Heizwalze
DE4317873C2 (de) * 1993-05-28 1994-04-21 Voith Gmbh J M Hohler Walzenkörper zur Verwendung in einer Papiermaschine oder dergleichen Anlage zur Herstellung endlosen Bahnmaterials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9523950A1 *

Also Published As

Publication number Publication date
EP0697091B1 (fr) 1998-09-23
DE4407239A1 (de) 1995-09-07
JPH09500956A (ja) 1997-01-28
FI955293A0 (fi) 1995-11-03
US5655596A (en) 1997-08-12
WO1995023950A1 (fr) 1995-09-08
CA2162178A1 (fr) 1995-09-08
DE59503674D1 (de) 1998-10-29
KR960702094A (ko) 1996-03-28
FI955293A (fi) 1995-11-03

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