EP0285081B1 - Heated smoothing or calander rollers - Google Patents

Heated smoothing or calander rollers Download PDF

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Publication number
EP0285081B1
EP0285081B1 EP88105020A EP88105020A EP0285081B1 EP 0285081 B1 EP0285081 B1 EP 0285081B1 EP 88105020 A EP88105020 A EP 88105020A EP 88105020 A EP88105020 A EP 88105020A EP 0285081 B1 EP0285081 B1 EP 0285081B1
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EP
European Patent Office
Prior art keywords
roll
central bore
calender
journal
heatable glazing
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
EP88105020A
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German (de)
French (fr)
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EP0285081A2 (en
EP0285081A3 (en
Inventor
Hans-Friedrich Neuhöffer
Erich Vomhoff
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Schwaebische Huettenwerke Automotive GmbH
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Schwaebische Huettenwerke Automotive GmbH
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Publication of EP0285081A2 publication Critical patent/EP0285081A2/en
Publication of EP0285081A3 publication Critical patent/EP0285081A3/en
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Publication of EP0285081B1 publication Critical patent/EP0285081B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00Elements specially adapted for movement
    • F28F5/02Rotary drums or rollers
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00Dryer section of machines for making continuous webs of paper
    • D21F5/02Drying on cylinders
    • D21F5/021Construction of the cylinders
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00Dryer section of machines for making continuous webs of paper
    • D21F5/02Drying on cylinders
    • D21F5/022Heating the cylinders
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00Calenders; Smoothing apparatus
    • D21G1/02Rolls; Their bearings
    • D21G1/0253Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid

Definitions

  • the invention relates to a heatable calender or calender roll of the type specified in the preamble of claim 1.
  • Such a roller emerges from EP-A 0 158 220 and has a roller body, peripheral bores in the roller body for the flow of a fluid heat transfer medium, a flange pin for each end of the roller body, a shoulder offset on the flange pin on the end face within the jacket region of the roller body , which engages in a corresponding recess in the roller body, furthermore supply and discharge lines for the fluid heat carrier in at least one flange pin, and cutouts for the distribution of the fluid heat carrier from the supply lines to the peripheral bores and from the peripheral bores to the discharge lines.
  • GB-A 861 188 discloses a smoothing or calender roll in which the central bore in the roll body is aligned with a conical recess in the end face of each flange journal, which in turn merges into a central bore in the flange journal. Heated compressed air is fed through these holes into the interior of the roller.
  • the invention has for its object to provide a heatable smoothing or calender roll of the type specified, which is very stable, especially in its sensitive edge area in the end faces of the roll body, so that no cracks or breaks even during long operation at elevated temperatures of the roll body shows.
  • thermal insulation can be achieved in a structurally simple manner, namely by insulating sleeves made of a heat-insulating material, which can be inserted into the peripheral bores from the end face.
  • the lengths of these insulation sleeves can be match the operating conditions targeted; because by selecting such insulation sleeves in a certain length, a precisely defined heat transfer between the roller body and the flange pin can be achieved in this area, for example to compensate for the oxbow effect.
  • this spatial configuration of the transition area between the roller body and the flange pin enables very good thermal insulation in this area, in that the inner surfaces of the cutouts are lined with an insulation material, for example made of a heat-insulating plastic; this heat insulation can extend over the entire inner surface of the supply and / or discharge lines in the flange spigot and over the surfaces of the recess.
  • thermal insulation is also provided between the contact surfaces of the flange pin on the one hand and the roller body on the other hand, as is already known from DE-A 3 518 808.
  • This principle can be used for both center rolls and drive rolls; in the case of center rolls, both flange journals are available for the passage of the fluid heat transfer medium, so that no central hole is required in the roll body in this construction.
  • all roller bodies are produced with a central bore, so that the central bore of the roller body can be closed when used as a central roller.
  • a distributor body is attached, for example screwed, to the end face of the roller body on both sides, which prevents the fluid heat carrier from penetrating into the central bore.
  • This distributor plate can be provided with flow-guiding blades which serve to redirect the flow from the feed and discharge lines for the fluid carrier in at least one flange pin to and from the peripheral bores; These blades are arranged in such a way that they accelerate the incoming heat transfer medium in the circumferential direction and brake the outgoing heat transfer medium from its peripheral speed, in order to thereby ensure a uniform, vortex-free flow.
  • FIG. 1 shows a central roller, indicated generally by reference number 10, which has a cylindrical roller body 12 and a flange pin 14 on both sides of each roller body 12, of which only the left flange pin can be seen in the figure.
  • the flange pin 14 is fastened to the end face of the roller body 12 by means of a screw 18;
  • a heat insulation layer 20 is arranged between the two end faces of flange pin 14 and roller body 12, as is already known from DE-OS 3 518 808.
  • a web 16 to be treated for example a paper web, is indicated on the outer cylindrical surface of the roller body 12.
  • the roller body 12 has an axially running, central bore 36 as well as a plurality of peripheral bores 35 arranged at equal angular intervals under its lateral surface. For example, eight or sixteen peripheral bores 35 can be provided, which extend over the entire axial length of the roller body 12.
  • the end face of the roller body 12 runs largely flat and has only a small shoulder 13 at the transition from the central area of the end face to the outer contact surface for the flange pin, where the thermal insulation layer 20 is located.
  • a shoulder 9 of the flange pin 14 protrudes radially within this shoulder in the axial direction.
  • the flange pin 14 is also provided with a central bore 15 which is aligned with the central bore 36 in the roller body 12, but has a somewhat smaller inner diameter; the right end face of the flange pin 14 as shown in FIG. 1 is provided with a recess which begins approximately at the edge of the central bore 15 and extends radially outward; the radially outer edge of the recess 17 is aligned with the radially outer edge of the peripheral bores 35.
  • Both the central bore 15 of the flange pin 14 and the flange-side wall of the recess 17 and the mouth of the peripheral holes 35 are provided with thermal insulation layers, namely with a sleeve 22 made of heat-insulating material which lines the central bore 15, heat-insulating linings 24 and 26 for the recess 17 and finally a sleeve 38 of insulating material which is inserted into the mouth of the peripheral bore 35.
  • the length of this sleeve 38 can be adapted to the desired operating conditions and a defined heat transfer can be achieved in this area.
  • the central bore 36 is not required for the conduction of the fluid heat carrier.
  • the central bore 36 can be closed by means of a distributor plate 28, which bears against the central area of the end face of the roller body 12, of course with the recess in the peripheral bores 35, and by means of a screw 32 is th, which is screwed into the opposite end wall of the flange pin 14.
  • a plate 39 made of heat-insulating material is arranged in order to reduce the heat transfer from the roller body 12 to the flange pin 14.
  • the plate 39 also covers the mouth of the central bore 36.
  • O-rings 34 seal the gap between the distributor plate 28 and the end face of the roller body 12.
  • Flow-conducting blades 30 are welded onto the distributor plate 28, of which only one blade is shown in FIG. 1. These blades 30 are arranged in such a way that they accelerate the incoming heat transfer medium in the circumferential direction and brake the outgoing heat transfer medium from its peripheral speed and project radially into the flow space, namely into the recess 17.
  • FIG. 2 shows the heating side of a drive roller, in which a flange pin is required for the coupling with the drive device; in this case the central bore 36 must be used for the return of the fluid heat carrier.
  • a tube 40 is inserted into the central bore 15 of the flange pin 14, which runs coaxially to the wall of the central bore 15 and opens into the central bore 36 of the roller body 12.
  • the fluid heat transfer medium on the heating side shown is fed, for example, through the annular gap between the pipe 40 and the inner wall of the central bore 15 and is diverted outward via the recess 17 to the peripheral bores 35, which are not shown in FIG. 2 are.
  • the fluid heat transfer medium is supplied from the peripheral bores 35 via a corresponding recess 17 in the end face of the flange pin 14 to the central bore 36 of the roller body 12 and flows back through this central bore 36 until it finally flows through the pipe 40 on the Heating side of the drive roller is passed on again.
  • a sleeve 41 made of heat-insulating material is inserted, which in this area reduces the heat transfer from the fluid heat transfer medium in the central bore 36 to the roller body and thus to the flange pin 14.

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  • 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)

Description

Die Erfindung betrifft eine beheizbare Glättwerk-oder Kalanderwalze der im Oberbegriff des Anspruchs 1 angegebenen Gattung.The invention relates to a heatable calender or calender roll of the type specified in the preamble of claim 1.

Eine solche Walze geht aus der EP-A 0 158 220 hervor und weist einen Walzenkörper, periphere Bohrungen in dem Walzenkörper für den Durchfluß eines fluiden Wärmeträgers, einen Flanschzapfen für jedes Ende des Walzenkörpers, einen an dem Flanschzapfen stirnseitig innerhalb des Mantelbereichs des Walzenkörpers abgesetzten Ansatz, der in eine entsprechende Ausnehmung des Walzenkörpers eingreift, weiterhin Zu- bzw. Abführleitungen für den fluiden Wärmeträger in mindestens einem Flanschzapfen sowie Aussparungen für die Verteilung des fluiden Wärmeträgers von den Zuführleitungen auf die peripheren Bohrungen und von den peripheren Bohrungen auf die Abführleitungen auf.Such a roller emerges from EP-A 0 158 220 and has a roller body, peripheral bores in the roller body for the flow of a fluid heat transfer medium, a flange pin for each end of the roller body, a shoulder offset on the flange pin on the end face within the jacket region of the roller body , which engages in a corresponding recess in the roller body, furthermore supply and discharge lines for the fluid heat carrier in at least one flange pin, and cutouts for the distribution of the fluid heat carrier from the supply lines to the peripheral bores and from the peripheral bores to the discharge lines.

Dabei geht von den die Aussparungen begrenzenden Bereichen der Stirnflächen eine Schar entlang von Mantellinien eines Kegelstumpfes divergierenden Bohrungen aus, die jeweils in eine der peripheren Bohrungen einmünden; außerhalb dieser Einmündungen sind die peripheren Bohrungen beidseitig durch Verschlußstopfen geschlossen, so daß sich an diesen Verschlußstopfen eine Anströmung des fluiden Wärmeträgers und damit eine Störung der Strömung ergibt, die wiederum zu ungleichmäßigen Wärmeübergängen führt.A group of holes diverging along the surface lines of a truncated cone, each of which opens into one of the peripheral holes, starts from the regions of the end faces delimiting the cutouts; outside of these openings, the peripheral bores are closed on both sides by sealing plugs, so that there is an inflow of fluid on the sealing plug and thus a disturbance of the flow, which in turn leads to uneven heat transfers.

Außerdem läßt die Wärmeisolierung zwischen den Walzenkörpern und den Flanschzapfen zu wünschen übrig; denn wie beispielsweise bereits in der DE-A 3 518 808 erläutert wird, muß die Wärmeausdehnung der Flanschzapfen einerseits und des Walzenkörpers andererseits so angepaßt werden, daß eine gezielte Verformung der beiden Lagerzapfen erreicht und dadurch beispielsweise der sogenannte "Oxbow-Effekt" kompensiert wird. Entsprechendes gilt auch für die Ausführungsform einer solchen beheizbaren Glättwerk- oder Kalanderwalze, bei der die von den Mündungen der peripheren Bohrungen umschlossenen Bereiche der Stirnflächen des Walzenkörpers unter Bildung jeweils eines bis zu den Mündungen der peripheren Bohrungen reichenden Spaltes bzw. einer Aussparung gegen die gegenüberliegenden Grundflächenbereiche der Flanschzapfen zurücktreten; zentrale Zu- und Abführleitungen führen jedoch jeweils bis zu diesen Aussparungen; dadurch soll die Beheizung exakt vorgegebener Mantelbereiche des Walzenkörpers möglich sein.In addition, the heat insulation between the roller bodies and the flange pin leaves something to be desired; because, as has already been explained, for example, in DE-A 3 518 808, the thermal expansion of the flange journal on the one hand and of the roller body on the other must be adjusted so that a targeted deformation of the two journal journals is achieved and the so-called "oxbow effect" is thereby compensated for, for example. The same also applies to the embodiment of such a heatable calender roll or calender roll, in which the areas of the end faces of the roll body enclosed by the mouths of the peripheral bores, each forming a gap extending up to the mouths of the peripheral bores or a recess against the opposite base area areas withdraw the flange pin; central supply and discharge lines, however, each lead up to these recesses; this should make it possible to heat exactly predetermined jacket areas of the roller body.

Ein weiteres Problem bei diesen Glättwerk- oder Kalanderwalzen liegt darin, daß die Stirnfläche des Walzenkörpers zur Ausbildung der Aussparung bearbeitet, beispielsweise ausgefräst oder ausgedreht werden muß. Die so geschaffenen Aussparungen befinden sich dann in einem Bereich des Walzenkörpers, in dem seine Eigenspannungen einen kritischen Wert haben, so daß jeder Eingriff in diesen Bereich des Walzenkörpers zu einer Erhöhung der Bruchgefahr führt. Es ist deshalb eine Vielzahl von Fällen bekannt geworden, bei denen in der üblichen Weise gegossene Walzenkörper, die in der Mitte aus Grauguß und in dem Randbereich aus Weißguß bestehen, bei der Einfräsung solcher Aussparungen in die Stirnflächen des Walzenkörpers reißen und dadurch unbrauchbar werden.Another problem with these smoothing or calender rolls is that the end face of the roll body has to be machined to form the recess, for example milled or turned out. The recesses created in this way are then located in an area of the roller body in which its internal stresses have a critical value, so that any intervention in this area of the roller body leads to an increased risk of breakage. A large number of cases have therefore become known in which roll bodies cast in the customary manner, which consist of gray cast iron in the middle and white cast iron in the edge region, tear when such recesses are milled into the end faces of the roll body and are therefore unusable.

Aus der GB-A 861 188 geht eine Glättwerk- oder Kalanderwalze hervor, bei der die Zentralbohrung im Walzenkörper mit einer konischen Aussparung in der Stirnfläche jedes Flanschzapfens fluchtet, die wiederum in eine zentrale Bohrung im Flanschzapfen übergeht. Durch diese Bohrungen wird erwärmte Druckluft in das Innere der Walze geleitet.GB-A 861 188 discloses a smoothing or calender roll in which the central bore in the roll body is aligned with a conical recess in the end face of each flange journal, which in turn merges into a central bore in the flange journal. Heated compressed air is fed through these holes into the interior of the roller.

Eine ähnliche Walzenkonstruktion mit einer Aussparung in der Stirnfläche des bzw. jedes Flanschzapfens geht aus der FR-A 2 438 706 hervor. Dabei handelt es sich jedoch in beiden Fällen um andere Walzentypen, insbesondere ohne periphere Bohrungen im Walzenkörper für den Durchfluß eines fluiden Wärmeträgers.A similar roller construction with a recess in the end face of the or each flange pin is apparent from FR-A 2 438 706. In both cases, however, these are other types of rollers, in particular without peripheral bores in the roller body for the flow of a fluid heat transfer medium.

Der Erfindung liegt die Aufgabe zugrunde, eine beheizbare Glättwerk- oder Kalanderwalze der angegebenen Gattung zu schaffen, die insbesondere in ihrem empfindlichen Randbereich in den Stirnflächen des Walzenkörpers sehr stabil ist, so daß auch bei langem Betrieb bei erhöhten Temperaturen der Walzenkörper keine Risse oder gar Brüche zeigt.The invention has for its object to provide a heatable smoothing or calender roll of the type specified, which is very stable, especially in its sensitive edge area in the end faces of the roll body, so that no cracks or breaks even during long operation at elevated temperatures of the roll body shows.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Zweckmäßige Ausführungsformen werden durch die Merkmale der Unteransprüche definiert.Expedient embodiments are defined by the features of the subclaims.

Die mit der Erfindung erzielten Vorteile beruhen zunächst darauf, daß die mechanische, insbesondere spanabhebende Bearbeitung der Stirnflächen des Walzenkörpers sehr gering ist, wobei angestrebt wird, mit Ausnahme der Ausbildung der peripheren Bohrungen gar keine mechanische Bearbeitung vorzunehmen.The advantages achieved with the invention are based first of all on the fact that the mechanical, in particular machining, machining of the end faces of the roller body is very low, with the aim being to carry out no mechanical processing at all, with the exception of the formation of the peripheral bores.

So ist es beispielsweise möglich, nur eine kleine, zentrale Aussparung mit einer Schulter zu verwenden, die zusammen mit der zugehörigen winzigen Aussparung in der Stirnfläche des Walzenkörpers zur Führung beim Ein- bzw. Ausbau des Walzenkörpers dient, während der überwiegende Teil der Aussparung sich in der entsprechenden Stirnfläche des Flanschzapfens befindet.For example, it is possible to use only a small, central recess with a shoulder, which, together with the associated tiny recess in the end face of the roller body, serves to guide the installation and removal of the roller body, while the majority of the recess is in the corresponding end face of the flange pin.

Außerdem müssen aufgrund der radialen Erstreckung der Aussparung bis auf die Höhe der peripheren Bohrungen keine Schrägbohrungen mehr vorgesehen werden, die die Verbindung zwischen der zentralen Aussparung und den peripheren Bohrungen herstellen, wie es aus der EP-A 0 158 220 bekannt ist.In addition, due to the radial extension of the recess up to the height of the peripheral bores, it is no longer necessary to provide oblique bores which establish the connection between the central recess and the peripheral bores, as is known from EP-A 0 158 220.

Gleichzeitig ergibt sich eine sehr gleichmäßige Strömung von dem zentralen Kanal in dem bzw. jeden Flanschzapfen über die strömungsgünstige Form der Aussparung zu den peripheren Bohrungen, wie sie mit den bekannten Maßnahmen nicht erreicht werden kann.At the same time, there is a very uniform flow from the central channel in the or each flange pin via the aerodynamic shape of the recess to the peripheral bores, which cannot be achieved with the known measures.

Und schließlich läßt sich so auf konstruktiv einfache Weise eine sehr gute Wärmeisolierung erreichen, nämlich durch Isolationshülsen aus einem wärmedämmenden Material, die von der Stirnfläche her in die peripheren Bohrungen gesteckt werden können. Die Längen dieser Isolationshülsen lassen sich auf die jeweils angestrebten Betriebsbedingungen abstimmen; denn durch Auswahl solcher Isolationshülsen in einer bestimmten Länge läßt sich in diesem Bereich ein genau definierter Wärmeübergang zwischen dem Walzenkörper und dem Flanschzapfen erzielen, um beispielsweise den Oxbow-Effekt zu kompensieren.And finally, very good thermal insulation can be achieved in a structurally simple manner, namely by insulating sleeves made of a heat-insulating material, which can be inserted into the peripheral bores from the end face. The lengths of these insulation sleeves can be match the operating conditions targeted; because by selecting such insulation sleeves in a certain length, a precisely defined heat transfer between the roller body and the flange pin can be achieved in this area, for example to compensate for the oxbow effect.

Außerdem wird durch diese räumliche Ausgestaltung des Übergangsbereiches zwischen Walzenkörper und Flanschzapfen eine sehr gute Wärmeisolierung in diesem Bereich möglich, indem die Innenflächen der Aussparungen mit einem Isolaltionsmaterial ausgekleidet werden, beispielsweise aus einem wärmeisolierenden Kunststoff; diese Wärmeisolierung kann sich über die gesamte Innenfläche der Zu- und/oder Abführleitungen in den Flanschzapfen und über die Flächen der Aussparung erstrecken.In addition, this spatial configuration of the transition area between the roller body and the flange pin enables very good thermal insulation in this area, in that the inner surfaces of the cutouts are lined with an insulation material, for example made of a heat-insulating plastic; this heat insulation can extend over the entire inner surface of the supply and / or discharge lines in the flange spigot and over the surfaces of the recess.

Selbstverständlich ist zwischen den Anlageflächen von Flanschzapfen einerseits und Walzenkörper andererseits ebenfalls eine Wärmeisolierung vorgesehen, wie es bereits aus der DE-A 3 518 808 bekannt ist.Of course, thermal insulation is also provided between the contact surfaces of the flange pin on the one hand and the roller body on the other hand, as is already known from DE-A 3 518 808.

Dieses Prinzip kann sowohl bei Mittelwalzen als auch bei Antriebswalzen eingesetzt werden; bei Mittelwalzen stehen beide Flanschzapfen für die Durchführung des fluiden Wärmeträgers zur Verfügung, so daß bei dieser Konstruktion keine zentrale Bohrung im Walzenkörper erforderlich ist. In aller Regel werden jedoch alle Walzenkörper mit einer zentralen Bohrung hergestellt, so daß bei der Verwendung als Mittelwalze die zentrale Bohrung des Walzenkörpers verschlossen werden kann. Zu diesem Zweck wird an der Stirnfläche des Walzenkörpers auf beiden Seiten ein Verteilerkörper angebracht, beispielsweise angeschraubt, der das Eindringen des fluiden Wärmeträgers in die zentrale Bohrung verhindert. Dieser Verteilerteller kann mit strömungsleitenden Schaufeln versehen werden, die zur Umleitung der Strömung von den Zu- und Abführleitungen für den fluiden Träger in mindestens einem Flanschzapfen zu den bzw. aus den peripheren Bohrungen dienen; diese Schaufeln sind so angeordnet, daß sie den einlaufenden Wärmeträger in Umfangsrichtung bescheunigen und den auslaufenden Wärmeträger aus seiner Umfangsgeschwindigkeit abbremsen, um dadurch eine gleichmäßige, wirbelfreie Strömung zu gewährleisten.This principle can be used for both center rolls and drive rolls; in the case of center rolls, both flange journals are available for the passage of the fluid heat transfer medium, so that no central hole is required in the roll body in this construction. As a rule, however, all roller bodies are produced with a central bore, so that the central bore of the roller body can be closed when used as a central roller. For this purpose, a distributor body is attached, for example screwed, to the end face of the roller body on both sides, which prevents the fluid heat carrier from penetrating into the central bore. This distributor plate can be provided with flow-guiding blades which serve to redirect the flow from the feed and discharge lines for the fluid carrier in at least one flange pin to and from the peripheral bores; These blades are arranged in such a way that they accelerate the incoming heat transfer medium in the circumferential direction and brake the outgoing heat transfer medium from its peripheral speed, in order to thereby ensure a uniform, vortex-free flow.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden, schematischen Zeichnungen näher edäutert. Es zeigen:

  • Fig. 1 einen Detailschnitt durch den oberen Teil des linken Endes einer Mittelwalze, und
  • Fig. 2 eine ähnliche Ansicht der Heizseite einer Antriebswalze.
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying schematic drawings. Show it:
  • Fig. 1 shows a detail section through the upper part of the left end of a center roller, and
  • Fig. 2 is a similar view of the heating side of a drive roller.

Fig. 1 zeigt eine allgemein durch das Bezugszeichen 10 angedeutete Mittelwalze, die einen zylindrischen Walzenkörper 12 und an den beiden Seiten jedes Walzenkörpers 12 einen Flanschzapfen 14 aufweist, von denen nur der linke Flanschzapfen aus der Figur ersichtlich ist. Der Flanschzapfen 14 ist mittels einer Schraube 18 an der Stirnfläche des Walzenkörpers 12 befestigt; zwischen den beiden, aneinanderliegenden Stirnflächen von Flanschzapfen 14 und Walzenkörper 12 ist eine Wärmedämmschicht 20 angeordnet, wie es bereits aus der DE-OS 3 518 808 bekannt ist.1 shows a central roller, indicated generally by reference number 10, which has a cylindrical roller body 12 and a flange pin 14 on both sides of each roller body 12, of which only the left flange pin can be seen in the figure. The flange pin 14 is fastened to the end face of the roller body 12 by means of a screw 18; A heat insulation layer 20 is arranged between the two end faces of flange pin 14 and roller body 12, as is already known from DE-OS 3 518 808.

Auf der äußeren Zylinderfläche des Walzenkörpers 12 ist eine zu behandelnde Bahn 16 angedeutet, beispielsweise eine Papierbahn.A web 16 to be treated, for example a paper web, is indicated on the outer cylindrical surface of the roller body 12.

Der Walzenkörper 12 weist eine axial verlaufende, zentrale Bohrung 36 sowie mehrere, in gleichen Winkelabständen unter seiner Mantelfläche angeordnete periphere Bohrungen 35 auf. Es können beispielsweise acht oder sechzehn periphere Bohrungen 35 vorgesehen werden, die sich über die gesamte axiale Länge des Walzenkörpers 12 erstrecken.The roller body 12 has an axially running, central bore 36 as well as a plurality of peripheral bores 35 arranged at equal angular intervals under its lateral surface. For example, eight or sixteen peripheral bores 35 can be provided, which extend over the entire axial length of the roller body 12.

Die Stirnfläche des Walzenkörpers 12 verläuft weitgehend plan und weist nur eine kleine Schulter 13 beim Übergang von dem zentralen Bereich der Stirnfläche auf die äußere Anlagefläche für den Flanschzapfen auf, wo sich die Wärmedämmschicht 20 befindet.The end face of the roller body 12 runs largely flat and has only a small shoulder 13 at the transition from the central area of the end face to the outer contact surface for the flange pin, where the thermal insulation layer 20 is located.

Radial innerhalb dieser Schulter ragt in axialer Richtung ein abgesetzter Ansatz 9 des Flanschenzapfens 14 Dieser axial flach abgesetzte Anatz 9 erstreckt sich radial nach außen bis über die radiale Höhe der peripheren Bohrungen 35 hinaus.A shoulder 9 of the flange pin 14 protrudes radially within this shoulder in the axial direction. This shoulder 9, which is axially flat, extends radially outward beyond the radial height of the peripheral bores 35.

Der Flanschzapfen 14 ist ebenfalls mit einer zentralen Bohrung 15 versehen, die mit der zentralen Bohrung 36 in dem Walzenkörper 12 fluchtet, jedoch einen etwas kleineren Innendurchmesser hat; die gemäß der Darstellung in Fig. 1 rechte Stirnfläche des Flanschzapfens 14 ist mit einer Aussparung versehen, die etwa am Rand der zentralen Bohrung 15 beginnt und sich radial nach außen erstreckt; der radial äußere Rand der Aussparung 17 fluchtet mit dem radial äußeren Rand der peripheren Bohrungen 35.The flange pin 14 is also provided with a central bore 15 which is aligned with the central bore 36 in the roller body 12, but has a somewhat smaller inner diameter; the right end face of the flange pin 14 as shown in FIG. 1 is provided with a recess which begins approximately at the edge of the central bore 15 and extends radially outward; the radially outer edge of the recess 17 is aligned with the radially outer edge of the peripheral bores 35.

Sowohl die zentrale Bohrung 15 des Flanschzapfens 14 als auch die flanschzapfenseitige Wand der Aussparung 17 und die Mündung der peripheren Bohrungen 35 sind mit Wärmedämmschichten versehen, nämlich mit einer Hülse 22 aus wärmedämmendem Material, die die zentrale Bohrung 15 auskleidet, wärmedämmenden Auskleidungen 24 und 26 für die Aussparung 17 und schließlich eine Hülse 38 wärmedämmendem Material, die in die Mündung der peripheren Bohrung 35 eingesetzt ist. Die Länge dieser Hülse 38 kann an die gewünschten Betriebsbedingungen angepaßt und dadurch ein definierter Wärmeübergang in diesem Bereich erreicht werden.Both the central bore 15 of the flange pin 14 and the flange-side wall of the recess 17 and the mouth of the peripheral holes 35 are provided with thermal insulation layers, namely with a sleeve 22 made of heat-insulating material which lines the central bore 15, heat-insulating linings 24 and 26 for the recess 17 and finally a sleeve 38 of insulating material which is inserted into the mouth of the peripheral bore 35. The length of this sleeve 38 can be adapted to the desired operating conditions and a defined heat transfer can be achieved in this area.

Da bei einer Mittelwalze beide Flanschzapfen 14 für die Zu- bzw. Abfuhr des fluiden Wärmeträgers zur Verfügung stehen, wird die zentrale Bohrung 36 für die Leitung des fluiden Wärmeträgers nicht benötigt. In vielen Fällen kann es zwar zweckmäßig sein, auch die zentrale Bohrung 36 mit dem fluiden Wärmeträger, im allgemeinen OI oder Wasser, zu füllen; ist dies nicht der Fall, so kann die zentrale Bohrung 36 mittels einer Verteilerplatte 28 verschlossen werden, die an dem zentralen Bereich der Stirnfläche des Walzenkörpers 12, selbstverständlich unter Aussparung der peripheren Bohrungen 35, anliegt und mittels einer Schraube 32 gehalten ist, die in die gegenüberliegende Stirnwand des Flanschzapfens 14 eingeschraubt ist.Since, in the case of a center roll, both flange journals 14 are available for supplying and removing the fluid heat carrier, the central bore 36 is not required for the conduction of the fluid heat carrier. In many cases it may be expedient to also fill the central bore 36 with the fluid heat transfer medium, generally OI or water; if this is not the case, the central bore 36 can be closed by means of a distributor plate 28, which bears against the central area of the end face of the roller body 12, of course with the recess in the peripheral bores 35, and by means of a screw 32 is th, which is screwed into the opposite end wall of the flange pin 14.

Zwischen der Verteilerplatte 28 und der Stirnfläche des Walzenkörpers 12 ist eine Platte 39 aus wärmedämmendem Material angeordnet, um auch hier den Wärmeübergang von dem Walzenkörper 12 auf den Flanschzapfen 14 zu verringern. Die Platte 39 deckt auch die Mündung der zentralen Bohrung 36 ab.Between the distributor plate 28 and the end face of the roller body 12, a plate 39 made of heat-insulating material is arranged in order to reduce the heat transfer from the roller body 12 to the flange pin 14. The plate 39 also covers the mouth of the central bore 36.

O-Ringe 34 dichten den Spalt zwischen der Verteilerplatte 28 und der Stirnfläche des Walzenkörpers 12 ab. Auf die Verteilerplatte 28 sind strömungsleitende Schaufeln 30 aufgeschweißt, von denen in Fig. 1 nur eine Schaufel dargestellt ist. Diese Schaufeln 30 sind so angeordnet, daß sie den einlaufenden Wärmeträger in Umfangsrichtung beschleunigen und den auslaufenden Wärmeträger aus seiner Umfangsgeschwindigkeit abbremsen und stehen radial in den Strömungsraum, nämlich in die Aussparung 17 vor.O-rings 34 seal the gap between the distributor plate 28 and the end face of the roller body 12. Flow-conducting blades 30 are welded onto the distributor plate 28, of which only one blade is shown in FIG. 1. These blades 30 are arranged in such a way that they accelerate the incoming heat transfer medium in the circumferential direction and brake the outgoing heat transfer medium from its peripheral speed and project radially into the flow space, namely into the recess 17.

Geht man bei der Mittelwalze nach Fig. 1 davon aus, daß die Zuführung des fluiden Wärmeträgers durch die zentrale Bohrung 15 des Flanschzapfens 14 erfolgt, so ergibt sich ein Strömungsverlauf für den fluiden Wärmeträger von der zentralen Bohrung 15 über die Aussparung 17, die auf einer Seite durch die plane Verteilerplatte 28 und auf der anderen Seite durch eine Ausfräsung bzw. Eindrehung in der Stirnwand des Flanschzapfens 14 begrenzt wird, zu den peripheren Bohrungen 35, wobei die Schaufeln 30 die erläuterte strömungsführende Funktion übernehmen. Diese Strömung ist also weitgehend wirbelfrei, so daß sich definierte Strömungs- und damit auch Temperaturbedingungen ergeben.1 assumes that the supply of the fluid heat carrier takes place through the central bore 15 of the flange pin 14, there is a flow course for the fluid heat carrier from the central bore 15 through the recess 17, which on a Side is delimited by the flat distributor plate 28 and on the other side by milling or screwing in the end wall of the flange pin 14, to the peripheral bores 35, the blades 30 taking over the flow-carrying function explained. This flow is therefore largely vortex-free, so that defined flow and thus temperature conditions result.

Auf der nicht dargestellten Seite verläuft die Strömung von den Bohrungen 35 über die Aussparung 17 zu der Bohrung 15 in dem anderen Flanschzapfen 14 nach außen.On the side that is not shown, the flow from the bores 35 extends outward via the cutout 17 to the bore 15 in the other flange pin 14.

Die Figur 2 zeigt die Heizseite einer Antriebswalze, bei der ein Flanschzapfen für die Kupplung mit der Antriebseinrichtung benötigt wird; in diesem Fall muß die zentrale Bohrung 36 für die Rückführung des fluiden Wärmeträgers benutzt werden.FIG. 2 shows the heating side of a drive roller, in which a flange pin is required for the coupling with the drive device; in this case the central bore 36 must be used for the return of the fluid heat carrier.

Bei einer solchen Antriebswalze ist in die zentrale Bohrung 15 des Flanschzapfens 14 ein Rohr 40 eingesetzt, das koaxial zur Wand der zentralen Bohrung 15 verläuft und in die zentrale Bohrung 36 des Walzenkörpers 12 mündet.In such a drive roller, a tube 40 is inserted into the central bore 15 of the flange pin 14, which runs coaxially to the wall of the central bore 15 and opens into the central bore 36 of the roller body 12.

Bei einer solchen Ausführungsform wird der fluide Wärmeträger auf der dargestellten Heizseite beispielsweise durch den ringförmigen Spalt zwischen dem Rohr 40 und der Innenwand der zentralen Bohrung 15 zugeführt und über die Aussparung 17 nach außen zu den peripheren Bohrungen 35 umgeleitet, die in Fig. 2 nicht dargestellt sind.In such an embodiment, the fluid heat transfer medium on the heating side shown is fed, for example, through the annular gap between the pipe 40 and the inner wall of the central bore 15 and is diverted outward via the recess 17 to the peripheral bores 35, which are not shown in FIG. 2 are.

Auf der gegenüberliegenden Antriebsseite wird der fluide Wärmeträger von den peripheren Bohrungen 35 über eine entsprechende Aussparung 17 in der Stirnfläche des Flanschzapfens 14 der zentralen Bohrung 36 des Walzenkörpers 12 zugeführt und strömt durch diese zentrale Bohrung 36 zurück, bis sie schließlich durch das Rohr 40 auf der Heizseite der Antriebswalze weidergeleitet wird.On the opposite drive side, the fluid heat transfer medium is supplied from the peripheral bores 35 via a corresponding recess 17 in the end face of the flange pin 14 to the central bore 36 of the roller body 12 and flows back through this central bore 36 until it finally flows through the pipe 40 on the Heating side of the drive roller is passed on again.

In das dem Flanschzapfen 14 zugewandte Ende der zentralen Bohrung 36 des Walzenkörpers ist eine Hülse 41 aus wärmedämmendem Material eingesetzt, die in diesem Bereich den Wärmeübergang von dem fluiden Wärmeträger in der zentralen Bohrung 36 zu dem Walzenkörper und damit zu dem Flanschzapfen 14 verringert.In the end of the central bore 36 of the roller body facing the flange pin 14, a sleeve 41 made of heat-insulating material is inserted, which in this area reduces the heat transfer from the fluid heat transfer medium in the central bore 36 to the roller body and thus to the flange pin 14.

Claims (11)

1. A heatable glazing roll or calender roll
a) having a roll body (12);
b) having peripheral bores (35) in the roll body (12) for a fluid heat carrier to flow through;
c) having a flanged journal (14) for each end of the roll body (12);
d) having an offset projection (9) on the end face of the flanged journal (14), inside the cylindrical surface region of the roll body (12), which projection engages in a corresponding recess in the roll body (12);
e) having feed or discharge ducts (15) for the fluid heat carrier in at least one flanged journal (14); and
f) having reliefs for the distribution of the fluid heat carrier form the feed ducts (15) to the peripheral bores (35) and from the peripheral bores (35) to the discharge ducts (15); characterised by the following features:
g) the reliefs (17) are in the end face of the or each flanged journal (14) and are bounded at the opposite side by the plane end face of the roll body (12);
h) the relief (17) in the end face of the or of each flanged journal (14) extends from a central bore (15) in the or in each flanged journal (14) radially outwards to the radial height of the peripheral bores (35); and
i) the axially flatly offset projections (9) extend radially outwards to above the radial height of the peripheral bores (35) which are arranged in the correspondingly axially flat recesses in the roll body (12).
2. A heatable glazing roll or calender roll according to Claim 1 characterised in that the central bore (15) in the flanged journal (14) at the heating side of a drive roll has a coaxial inner tube (40) to convey the fluid heat carrier, which tube is in communication with a central bore (36) in the roll body (12).
3. A heatable glazing roll or calender roll according to either one of Claims 1 or 2, characterised in that, in a middle roll, the central bore (36) in the roll body (12) is closed by means of distributor plates (28).
4. A heatable glazing roll or calender roll according to Claim 3, characterised by a O-ring between the distributor plate (28) and the end wall of the roll body.
5. A heatable glazing roll or calender roll according to either one of Claims 3 or 4, characterised in that the distributor plate (28) is fitted to the flanged journal (14) by means of screws (32).
6. A heatable glazing roll or calender roll according to any one of Claims 3 to 5, characterised in that flow-controllling blades (30) are fitted, for example welded, onto the side of the distributor plate (28) adjacent to the flanged journal (14), which blades accelerate the incoming heat carrier in the circumferential direction and brake the outgoing heat carrier from its circumferential speed.
7. A heatable glazing roll or calender roll according to Claim 6, characterised in that at least two blades (30) are provided projecting radially into the relief (17).
8. A heatable glazing roll or calender roll according to any one of Claims 1 to 7, characterised in that insulating sleeves (38) of a heat-insulating material, particularly a plastics material, are inserted in the mouths of the peripheral bores (35).
9. A heatable glazing roll or calender roll according to any one of Claims 1 to 8, characterised in that the central bore (15) in the or each flanged journal (14) and/or the wall of the reliefs (17) at the flanged- journal side are provided with a lining (22, 24, 26) of a heat-insulating material, particularly a plastics material.
10. A heatable glazing roll or calender roll according to any one of Claims 1 to 9, characterised in that a panel (39) of heat-insulating material is disposed between the distributor plate (28) and the end wall of the roll body (12).
11. A heatable glazing roll or calender roll according to any one of Claims 1 to 10, characterised in that, in a drive roll, an insulating sleeve (40) of heat-insulating material, particularly a plastics material, is inserted in the open end of the central bore (36) of the roll body (12), adjacent to the flanged journal (14).
EP88105020A 1987-04-02 1988-03-28 Heated smoothing or calander rollers Expired - Lifetime EP0285081B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3711027 1987-04-02
DE3711027 1987-04-02
DE3716223 1987-05-14
DE19873716223 DE3716223A1 (en) 1987-04-02 1987-05-14 HEATABLE SMOOTHING OR CALANDER ROLLER

Publications (3)

Publication Number Publication Date
EP0285081A2 EP0285081A2 (en) 1988-10-05
EP0285081A3 EP0285081A3 (en) 1989-03-15
EP0285081B1 true EP0285081B1 (en) 1990-11-14

Family

ID=25854226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105020A Expired - Lifetime EP0285081B1 (en) 1987-04-02 1988-03-28 Heated smoothing or calander rollers

Country Status (4)

Country Link
US (1) US4920623A (en)
EP (1) EP0285081B1 (en)
DE (2) DE3716223A1 (en)
FI (1) FI88632C (en)

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DE3900858A1 (en) * 1989-01-13 1990-07-26 Kuesters Eduard Maschf Roll
DE3909134A1 (en) * 1989-03-20 1990-10-04 Troester Maschf Paul SEALING PLATE CALENDAR
DE4002530A1 (en) * 1990-01-29 1991-08-01 Schwaebische Huettenwerke Gmbh ROLLER FOR A SMOOTHING OR CALENDAR
DE4033986A1 (en) * 1990-08-09 1992-02-13 Schwaebische Huettenwerke Gmbh ROLLER WITH HEATING DEVICE
DE4213484A1 (en) * 1992-04-24 1993-10-28 Voith Gmbh J M Paper polishing roller - has inner tie rods along the length with individual tensioning to link the roller journals
DE4300541A1 (en) * 1993-01-12 1994-08-11 Walzen Irle Gmbh Temperable roller
DE4313379C2 (en) * 1993-04-23 1998-11-05 Schwaebische Huettenwerke Gmbh Heating roller
US6158501A (en) * 1993-10-20 2000-12-12 Valmet Corporation Thermally insulated roll and insulation assembly for a thermoroll
DE19513500C2 (en) * 1995-04-10 1998-05-14 Schwaebische Huettenwerke Gmbh Adjustable shape roller
ATE245227T1 (en) 1999-03-05 2003-08-15 Walzen Irle Gmbh HEATED CALENDAR ROLLER
US6793754B1 (en) 1999-07-28 2004-09-21 Advanced Materials Corporation Covered roll having an under-layer formed of resin infused densely packed fibers that provides increased strength and adhesion properties
US6776744B1 (en) 1999-07-28 2004-08-17 Advanced Materials Corporation Method for and devices used in covering a roll core with a resin infused fiber reinforced adhesive under layer and a polymeric top layer, the method including the use of an improved mold tape
US6206994B1 (en) 1999-07-28 2001-03-27 Advanced Materials Corporation Method and apparatus for covering a metal roll core with a polymeric material preferable a high performance thermoplastic material
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DE8436564U1 (en) * 1985-03-28 Walzen Irle GmbH, 5902 Netphen Calender roll that can be heated by means of a heat-transferring medium
DE8410839U1 (en) * 1984-07-19 Walzen Irle GmbH, 5902 Netphen Calender roll that can be heated by means of a heat-transferring medium
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DE3536236A1 (en) * 1985-10-10 1987-04-16 Schwaebische Huettenwerke Gmbh HEATABLE SMOOTHING OR CALANDER ROLLER

Also Published As

Publication number Publication date
EP0285081A2 (en) 1988-10-05
DE3861039D1 (en) 1990-12-20
US4920623A (en) 1990-05-01
DE3716223A1 (en) 1988-10-13
EP0285081A3 (en) 1989-03-15
FI881548A0 (en) 1988-03-31
DE3716223C2 (en) 1991-10-24
FI881548A (en) 1988-10-03
FI88632C (en) 1993-06-10
FI88632B (en) 1993-02-26

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