EP0162381B1 - Heating or cooling roller - Google Patents

Heating or cooling roller Download PDF

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Publication number
EP0162381B1
EP0162381B1 EP85105742A EP85105742A EP0162381B1 EP 0162381 B1 EP0162381 B1 EP 0162381B1 EP 85105742 A EP85105742 A EP 85105742A EP 85105742 A EP85105742 A EP 85105742A EP 0162381 B1 EP0162381 B1 EP 0162381B1
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EP
European Patent Office
Prior art keywords
roll
jacket
guide
wheel
roller
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
Application number
EP85105742A
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German (de)
French (fr)
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EP0162381A1 (en
Inventor
Erich Pagendarm
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.)
ECH Will GmbH and Co
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ECH Will GmbH and Co
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Filing date
Publication date
Application filed by ECH Will GmbH and Co filed Critical ECH Will GmbH and Co
Publication of EP0162381A1 publication Critical patent/EP0162381A1/en
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Publication of EP0162381B1 publication Critical patent/EP0162381B1/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
    • F26B13/183—Arrangements for heating, cooling, condensate removal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller

Definitions

  • the invention relates to a cooling or heating roller with a roller jacket and a guide jacket fastened in the interior of the roller and rotatable with the roller jacket, with channels running in the roller bearings for supplying and removing a liquid heat transfer medium to and from the roller interior, with one between the guide - And the roll shell arranged cylinder gap for guiding the circulating flow along the roll shell and with a pump wheel for circulating the heat transfer medium which essentially completely fills the inside of the roll.
  • the guide jacket is arranged in a fixed manner, and it also protrudes from it an axially directed partition wall, which is also stationary, to the roller jacket.
  • a conveyor wheel rotating with the roller jacket is provided, which together with the dividing wall forms the circulating device.
  • the invention is therefore based on the object of providing a device of the type mentioned at the outset, which is less complex, in particular with regard to the setting of different circulation speeds.
  • the solution according to the invention is that the pump wheel is fixed.
  • the pump wheel is preferably arranged within the guide casing as an axial wheel.
  • a guide device can be provided, which can be designed in a particularly simple manner in the case of an axial wheel located within the guide jacket as a guide grid connected to the guide jacket.
  • a pump wheel fixedly arranged inside the roller is considerably less complex than a circulation pump equipped with a special drive, in particular also taking into account the necessary size of the flow cross-sections in the medium bushings in the roller bearings.
  • a further gradation of the circulation speed can be achieved by the optional assignment of guide devices.
  • the design of the circulators which is independent of the direction of rotation, is carried out according to the principles familiar in fluid technology. For example, in the case of a radial wheel, the direction of rotation of the delivery rate is achieved by using radially extending blades.
  • the cooling or heating roller is formed by a roller shell 1, end walls 2, 3 and generally at 4 or 5 indicated bearings, which allow the roller to be driven or to rotate with a guided web.
  • the roller includes the hollow roller interior 6, to which a liquid heat transfer medium is fed and discharged in a known manner via the bearings 4 and 5 in such a way that it is essentially completely filled by the liquid medium.
  • the supply and discharge quantity of the medium is measured exclusively according to the amount of heat to be exchanged, regardless of the speed required on the roller jacket to achieve the required heat transfer.
  • a guide jacket 7 is fastened in a suitable manner within the roll interior 6 such that it rotates with the roll. It includes a cylinder gap 8 with the roll shell, in which the heat transfer medium is brought to the speed required for heat transfer in the axial direction by internal circulation. It must be assumed that the heat transfer medium has a circumferential speed which is not significantly lower than that of the roll shell and the guide cylinder due to the frictional conditions and any guide means present.
  • a pump wheel 9 Arranged inside the guide cylinder is a pump wheel 9 designed as an axial wheel, which is seated on a fixed shaft 10 which is guided through the bearing 4 to the outside and is held there coaxially with the bearing and the roller.
  • a grid 11 can be connected upstream or downstream of the pump wheel 9 on one side or the other as a guide apparatus.
  • the pump wheel 9 causes circulation inside the roller, whose direction is indicated by a solid or dashed arrow.
  • the pump wheel and the diffuser can easily be dimensioned so that the axial flow velocities at the roll shell reach 0.5 to 5 times the circumferential roll speed. Since no drive is required for the fixed pump wheel and both this and the guide device 11 which may be provided can be made very simple, this result is achieved with very little effort, it being no problem to produce pump wheels and guide grids in different sizes for different roller dimensions and to keep flow velocities in stock or to make them at short notice from case to case.
  • Dash-dot lines indicate a radial wheel 12 that can take the place of the axial wheel 9 and, when equipped with radially extending blades, independently of the direction of rotation at the same speed in the direction of the arrow.
  • the guide jacket 7 can be made very thin because the pressure differences in the internal circuit are small.

Description

Die Erfindung bezieht sich auf eine Kühl- oder Heizwalze mit einem Walzenmantel und einem im Walzeninnern befestigten und mit dem Walzenmantel drehbaren Führungsmantel, mit in den Walzenlagern verlaufenden Kanälen zur Zu- und Abfuhr eines flüssigen Wärmeträgermediums zum bzw. vom Walzeninnern, mit einem zwischen dem Führungs- und dem Walzenmantel angeordneten Zylinderspalt zum Führen des Umwälzstroms entlang dem Walzenmantel und mit einem Pumpenrad zum Umwälzen des das Walzeninnere im wesentlichen vollständig füllenden Wärmeträgermediums.The invention relates to a cooling or heating roller with a roller jacket and a guide jacket fastened in the interior of the roller and rotatable with the roller jacket, with channels running in the roller bearings for supplying and removing a liquid heat transfer medium to and from the roller interior, with one between the guide - And the roll shell arranged cylinder gap for guiding the circulating flow along the roll shell and with a pump wheel for circulating the heat transfer medium which essentially completely fills the inside of the roll.

Bei einer bekannten Vorrichtung dieser Art (DE-A-26 50 858) ist der Führungsmantel feststehend angeordnet, und es ragt von ihm eine ebenfalls feststehende, axial gerichtete Trennwand zum Walzenmantel vor. Am Ende der axialen Erstreckung der Führungswand und der Trennwand ist ein mit dem Walzenmantel umlaufendes Förderrad vorgesehen, das gemeinsam mit der Trennwand die Umwälzeinrichtung bildet. Diese Anordnung hat den Vorteil, daß die für die Temperaturverteilung im Walzenmantel verantwortliche Relativgeschwindigkeit des Wärmeträgermediums gegenüber dem Walzenmantel unabhängig von der Zu- und Abführung des Wärmeträgermediums zum bzw. vom Walzeninneren allein durch entsprechende Bemessung der Umwälzeinrichtungen eingestellt werden kann. Die Kanäle in den Walzenlagern können entsprechend klein ausgebildet werden. Jedoch hat diese Anordnung den Nachteil, daß sie vergleichsweise aufwendig ist, insbesondere wenn unterschiedliche Strömungsgeschwindigkeiten innerhalb des Walzenhohlraums vorherbestimmbar sein sollen. Ferner ist eine Kühl- oder Heizwalze mit einem mit dem Walzenmantel drehbaren Führungsmantel bekannt (US-A 34 01 745), in der ein von außen mittels eines Motors antreibbares Axialpumpenrad vorgesehen ist, was den Nachteil eines verhältnismäßig hohen Aufwands für die Antriebs-und Lagerorgane mit sich bringt.In a known device of this type (DE-A-26 50 858), the guide jacket is arranged in a fixed manner, and it also protrudes from it an axially directed partition wall, which is also stationary, to the roller jacket. At the end of the axial extension of the guide wall and the dividing wall, a conveyor wheel rotating with the roller jacket is provided, which together with the dividing wall forms the circulating device. This arrangement has the advantage that the relative speed of the heat transfer medium, which is responsible for the temperature distribution in the roll shell, in relation to the roll shell can be adjusted independently of the supply and discharge of the heat transfer medium to and from the inside of the roll solely by appropriate dimensioning of the circulation devices. The channels in the roller bearings can be made correspondingly small. However, this arrangement has the disadvantage that it is comparatively complex, in particular if different flow velocities within the roller cavity are to be predeterminable. Also known is a cooling or heating roller with a guide jacket that can be rotated with the roller jacket (US Pat. No. 3,401,745), in which an axial pump wheel that can be driven from the outside by means of a motor is provided, which has the disadvantage of a relatively high outlay for the drive and bearing members brings with it.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, die weniger aufwendig ist, insbesondere im Hinblick auf die Einstellung unterschiedlicher Umwälzgeschwindigkeiten.The invention is therefore based on the object of providing a device of the type mentioned at the outset, which is less complex, in particular with regard to the setting of different circulation speeds.

Die erfindungsgemäße Lösung besteht darin, daß das Pumpenrad feststehend angeordnet ist. Vorzugsweise ist das Pumpenrad innerhalb des Führungsmantels als Axialrad angeordnet. Es besteht aber auch die Möglichkeit, es als Radial-oder Axialradialrad am Ende des Führungsmantels vorzusehen. Zur Steigerung des Wirkungsgrads kann eine Leitvorrichtung vorgesehen sein, die besonders einfach bei einem innerhalb des Führungsmantels befindlichen Axialrad als mit dem Führungsmantel verbundenes Leitgitter ausgebildet sein kann.The solution according to the invention is that the pump wheel is fixed. The pump wheel is preferably arranged within the guide casing as an axial wheel. However, there is also the possibility of providing it as a radial or axial radial wheel at the end of the guide jacket. To increase the efficiency, a guide device can be provided, which can be designed in a particularly simple manner in the case of an axial wheel located within the guide jacket as a guide grid connected to the guide jacket.

Es hat sich gezeigt, daß ein innerhalb des Walzeninneren feststehend angeordnetes Pumpenrad wesentlich weniger aufwendig ist als eine mit besonderem Antrieb ausgerüstete Umwälzpumpe, insbesondere auch unter Berücksichtigung der notwendigen Größe der Strömungsquerschnitte in den Mediumsdurchführungen in den Walzenlagern. Für die Einstellung unterschiedlicher Umwälzgeschwindigkeiten ist es lediglich erforderlich, entsprechend unterschiedliche Pumpenräder vorrätig zu halten. Eine weitere Abstufung der Umwälzgeschwindigkeit kann durch die wahlweise Zuordnung von Leitvorrichtungen erreicht werden. Die drehrichtungsunahbängige Ausführung der Umwälzeinrichtungen geschieht nach den in der Strömungstechnik geläufigen Grundsätzen. Beispielsweise wird bei einem Radialrad die Drehrichtungsunabhängigkeit der Fördermenge durch Verwendung von radial verlaufenden Schaufeln erreicht.It has been shown that a pump wheel fixedly arranged inside the roller is considerably less complex than a circulation pump equipped with a special drive, in particular also taking into account the necessary size of the flow cross-sections in the medium bushings in the roller bearings. To set different circulation speeds, it is only necessary to keep different pump wheels in stock. A further gradation of the circulation speed can be achieved by the optional assignment of guide devices. The design of the circulators, which is independent of the direction of rotation, is carried out according to the principles familiar in fluid technology. For example, in the case of a radial wheel, the direction of rotation of the delivery rate is achieved by using radially extending blades.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel in einem schematischen Längsschnitt veranschaulicht.The invention is explained in more detail below with reference to the drawing, which illustrates an advantageous embodiment in a schematic longitudinal section.

Die Kühl- oder Heizwalze wird gebildet von einem Walzenmantel 1, stirnseitigen Wänden 2, 3 und allgemein bei 4 bzw. 5 angedeuteten Lagern, die der Walze eine angetriebene oder mit einer geführten Bahn mitlaufende Rotationsbewegung gestatten. Die Walze schließt das hohle Walzeninnere 6 ein, dem in bekannter Weise über die Lager 4 und 5 ein flüssiges Wärmeträgermedium in solcher Weise zu- und abgeführt wird, daß es von dem flüssigen Medium im wesentlichen vollständig gefüllt ist. Die Zu- und Abfuhrmenge des Mediums wird ausschließlich nach der auszutauschenden Wärmemenge bemessen, ohne Rücksicht auf die am Walzenmantel zur Erreichung des erforderlichen Wärmeübergangs erforderlichen Geschwindigkeit.The cooling or heating roller is formed by a roller shell 1, end walls 2, 3 and generally at 4 or 5 indicated bearings, which allow the roller to be driven or to rotate with a guided web. The roller includes the hollow roller interior 6, to which a liquid heat transfer medium is fed and discharged in a known manner via the bearings 4 and 5 in such a way that it is essentially completely filled by the liquid medium. The supply and discharge quantity of the medium is measured exclusively according to the amount of heat to be exchanged, regardless of the speed required on the roller jacket to achieve the required heat transfer.

Konzentrisch zum Walzenmantel 1 ist innerhalb des Walzeninneren 6 ein Führungsmantel 7 in geeigneter Weise so befestigt, daß er mit der Walze umläuft. Er schließt mit dem Walzenmantel einen Zylinderspalt 8 ein, in welchem das Wärmeträgermedium durch interne Umwälzung auf die für den Wärmeübergang erforderliche Geschwindigkeit in Axialrichtung gebracht wird. Dabei muß davon ausgegangen werden, daß infolge der Reibungsverhältnisse und ggf. vorhandener Führungsmittel das Wärmeträgermedium eine Umfangsgeschwindigkeit aufweist, die nicht wesentlich geringer ist als diejenige des Walzenmantels und des Führungszylinders.Concentric to the roll jacket 1, a guide jacket 7 is fastened in a suitable manner within the roll interior 6 such that it rotates with the roll. It includes a cylinder gap 8 with the roll shell, in which the heat transfer medium is brought to the speed required for heat transfer in the axial direction by internal circulation. It must be assumed that the heat transfer medium has a circumferential speed which is not significantly lower than that of the roll shell and the guide cylinder due to the frictional conditions and any guide means present.

Innerhalb des Führungszylinders ist ein als Axialrad ausgebildetes Pumpenrad 9 angeordnet, das auf einer feststehenden Welle 10 sitzt, die durch das Lager 4 nach außen geführt und dort koaxial zum Lager und zur Walze gehalten ist. Dem Pumpenrad 9 kann auf der einen oder anderen Seite ein Gitter 11 als Leitapparat vor- bzw. nachgeschaltet sein.Arranged inside the guide cylinder is a pump wheel 9 designed as an axial wheel, which is seated on a fixed shaft 10 which is guided through the bearing 4 to the outside and is held there coaxially with the bearing and the roller. A grid 11 can be connected upstream or downstream of the pump wheel 9 on one side or the other as a guide apparatus.

Je nach Drehrichtung der Walze verursacht das Pumpenrad 9 im Walzeninneren eine Umwälzung, deren Richtung mit durchgezogenem bzw. gestricheltem Pfeil angedeutet ist. Das Pumpenrad und der Leitapparat können ohne weiteres so bemessen werden, daß die axialen Strömungsgeschwindigkeiten am Walzenmantel das 0,5 bis 5-fache der Walzenumfangsgeschwindigkeit erreicht. Da kein Antrieb für das feststehende Pumpenrad erforderlich ist und sowohl dieses als auch der ggf. vorgesehene Leitapparat 11 sehr einfach ausgeführt sein kann, wird dieses Ergebnis mit sehr geringem Aufwand erreicht, wobei es keinerlei Schwierigkeiten bereitet, Pumpenräder und Leitgitter in unterschiedlicher Größe für unterschiedliche Walzenabmessungen und Strömungsgeschwindigkeiten vorrätig zu halten oder von Fall zu Fall kurzfristig anzufertigen.Depending on the direction of rotation of the roller, the pump wheel 9 causes circulation inside the roller, whose direction is indicated by a solid or dashed arrow. The pump wheel and the diffuser can easily be dimensioned so that the axial flow velocities at the roll shell reach 0.5 to 5 times the circumferential roll speed. Since no drive is required for the fixed pump wheel and both this and the guide device 11 which may be provided can be made very simple, this result is achieved with very little effort, it being no problem to produce pump wheels and guide grids in different sizes for different roller dimensions and to keep flow velocities in stock or to make them at short notice from case to case.

Strichpunktiert ist ein Radialrad 12 angedeutet, daß an die Stelle des Axialrades 9 treten kann und bei Ausrüstung mit radial verlaufenden Schaufeln drehrichtungs-unabhängig mit gleicher Geschwindigkeit in Pfeilrichtung fördert.Dash-dot lines indicate a radial wheel 12 that can take the place of the axial wheel 9 and, when equipped with radially extending blades, independently of the direction of rotation at the same speed in the direction of the arrow.

Der Führungsmantel 7 kann sehr dünn ausgeführt werden, weil die Druckdifferenzen im internen Kreislauf klein sind.The guide jacket 7 can be made very thin because the pressure differences in the internal circuit are small.

Claims (4)

1. Cooling or heating roll with a roll jacket (1) and a guide jacket (7) fixed in the roll interior and rotatable with the roll jacket, with channels in the roll bearings (4, 5) for feed and discharge of a fluid heat exchange medium to or from the interior of the roll, with a cylindrical gap (8) arranged between the guiding and the roll jackets for guiding the circulatory stream along the roll jacket and with a pump wheel (9, 12) for circulating the heat exchange medium substantially completely filling the interior of the roll, characterised in that the pump wheel (9, 12) is stationarily arranged.
2. Cooling or heating roll according to claim 1, characterised in that the pump wheel (9) is arranged within the guide jacket (7) as an axial wheel.
3. Cooling or heating roll according to claim 1, characterised in that the pump wheel (12) is arranged as a radial or axial-radial wheel at the end of the guide jacket (7).
4. Cooling or heating roll according to one of claims 1 to 3, characterised in that a guide arrangement (11) is arranged upstream or downstream of the pump wheel (9).
EP85105742A 1984-05-10 1985-05-10 Heating or cooling roller Expired EP0162381B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8414320U DE8414320U1 (en) 1984-05-10 1984-05-10 Cooling or heating roller
DE8414320U 1984-05-10

Publications (2)

Publication Number Publication Date
EP0162381A1 EP0162381A1 (en) 1985-11-27
EP0162381B1 true EP0162381B1 (en) 1988-03-23

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ID=6766737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105742A Expired EP0162381B1 (en) 1984-05-10 1985-05-10 Heating or cooling roller

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EP (1) EP0162381B1 (en)
DE (2) DE8414320U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19822531B4 (en) * 1998-05-19 2006-11-30 Voith Patent Gmbh calender roll
FI108252B (en) * 2000-10-05 2001-12-14 Metso Paper Inc Method and device for equalising local heat stresses

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE225448C (en) *
DE613662C (en) * 1930-04-27 1935-05-23 Teerverwertung M B H Ges Device for cooling liquid substances from two coaxially nested drums that can be moved relative to one another
US3237685A (en) * 1961-11-29 1966-03-01 Dow Chemical Co Fluid heated roll
DE1604248A1 (en) * 1965-05-20 1970-08-27 Winkler Fallert & Co Maschf Cooling and heating roller
DE2646111C3 (en) * 1976-10-13 1980-07-31 Kraftanlagen Ag, 6900 Heidelberg Device for distributing a liquid heat transfer medium inside heating and cooling rollers
DE2650858C2 (en) * 1976-11-06 1983-05-26 Erich 2000 Hamburg Pagendarm Cooling and heating roller with a rotatably mounted roller jacket
DE3014891A1 (en) * 1980-04-17 1981-10-22 Schwäbische Hüttenwerke GmbH, 7080 Aalen Paper making machine or coating machine heated roller - has extra feeds to deliver heating medium to roller mantle end zones

Also Published As

Publication number Publication date
DE3561975D1 (en) 1988-04-28
EP0162381A1 (en) 1985-11-27
DE8414320U1 (en) 1985-09-19

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