EP0233448B1 - Rotary drum - Google Patents

Rotary drum Download PDF

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Publication number
EP0233448B1
EP0233448B1 EP87100078A EP87100078A EP0233448B1 EP 0233448 B1 EP0233448 B1 EP 0233448B1 EP 87100078 A EP87100078 A EP 87100078A EP 87100078 A EP87100078 A EP 87100078A EP 0233448 B1 EP0233448 B1 EP 0233448B1
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EP
European Patent Office
Prior art keywords
chamber
rotary drum
circular flange
longitudinally
rollers
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
EP87100078A
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German (de)
French (fr)
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EP0233448A3 (en
EP0233448A2 (en
Inventor
Lothar Kostrzewa-Kock
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.)
Cessione noell Service und Maschinentechnik GmbH
Original Assignee
Salzgitter Maschinenbau GmbH
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Publication date
Application filed by Salzgitter Maschinenbau GmbH filed Critical Salzgitter Maschinenbau GmbH
Priority to AT87100078T priority Critical patent/ATE73924T1/en
Publication of EP0233448A2 publication Critical patent/EP0233448A2/en
Publication of EP0233448A3 publication Critical patent/EP0233448A3/en
Application granted granted Critical
Publication of EP0233448B1 publication Critical patent/EP0233448B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/024—Arrangements for gas-sealing the drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/24—Seals between rotary and stationary parts

Definitions

  • the invention relates to a sealing connection between the longitudinally mounted end of the rotary drum of a rotary kiln, drum dryer or the like and the chamber surrounding this end, for.
  • B. loading chamber which consists of a fixed part and a part connected to it via a compensator, mounted in a longitudinally movable part, which has a radial ring flange which, together with a corresponding ring flange of the rotary drum and sealing rings provided between them, seals the chamber to the outside, wherein a radial ring flange arranged on the end of the rotary drum facing the chamber acts on the longitudinally movable part of the chamber such that it is displaced in accordance with the longitudinal movements of the rotary drum end.
  • the invention has for its object to avoid these disadvantages and to find a design in which the movement is not transmitted via sealing rings, so that the sealing can be done only by lip sealing rings, the resulting changes in distance caused by the wobbling movements of the radial ring flange arranged on the rotating drum end can compensate for the two ring flanges used for sealing and therefore always bring about a good seal.
  • an additional radial annular flange is provided on the rotary drum end in addition to the radial annular flange which serves for sealing, the sliding blocks encompassing it or rollers and a rail carrying this is connected to the displaceable part of the chamber, and that one or more lip sealing rings are provided between the two ring flanges serving to seal the outside.
  • such a connection is provided between the additional ring flange and the longitudinally movable part of the chamber at two diametrically opposite positions of the rotary drum. This is best done on both sides of the rotating drum, because the rails can then be connected to the two claws with which the longitudinally movable chamber part is slidably mounted in a known manner on a support frame arranged on both sides of the rotating drum.
  • the arrangement is also advantageous because the additional ring flange makes the least wobble at these points.
  • each rail encompasses the ring flange with a play that corresponds to the existing or occurring wobble of the ring flange. This prevents the longitudinally movable part of the chamber from following every small axial movement which is caused by a wobble of the ring flange, which is practically unavoidable given the size of the rotating drum diameter, with each drum revolution.
  • the sliding blocks or rollers on the rail are adjustable.
  • the longitudinally movable part of the chamber on the support frame is not only slidably - as is known - in the longitudinal direction of the rotating drum, but also transversely thereto, so that the storage can also correspond to the changes in diameter of the chamber part, which at considerable size of the drum diameter and thus also the chamber of up to 3 meters must be taken into account.
  • the claws are arranged on the support frame with the interposition of one slide piece each, which can be displaced in the transverse direction and against the support frame in the longitudinal direction by means of grooves and springs.
  • the arrangement can also be made so that the slider against the claws in the longitudinal direction and against the support frame in the transverse direction is displaceable.
  • the claws and the support frame generally do not consist of a material that is suitable for sliding surfaces, it is advantageous if a further slide piece is provided between the slide piece on the one hand and the claws or the support frame on the other hand, which can be attached to the claw or is firmly connected to the support frame.
  • a spring running in the longitudinal direction of the rotary drum serves for this purpose, which engages upwards in a groove of a shoe fastened to it under the longitudinally movable chamber part with a radial play which takes thermal expansion into account and downwards in a corresponding groove in the supporting frame.
  • FIG. 1 shows the loading end of a tumble dryer, namely FIG. 1 in a side view and in FIG. 2 in a partial section along the line II-II in FIG. 1.
  • the rotary drum is labeled 1. It is slightly inclined against the horizontal and is rotatable about its longitudinal axis by means of races and roller stations (not shown). It protrudes with its end, not shown, into an outlet chamber, through which the moist drying gases are also drawn off, and with the illustrated end into a charging chamber 2, to which the inlet pipe 3 for the hot drying gases is connected. A pipe 4 leads into this, through which the material to be dried is given up.
  • the feed chamber 2 is well sealed with respect to the rotary drum 1.
  • lip-like sealing rings 24 are provided on a radial ring flange 25 of the rotary drum located in front of the end face of the chamber 2, which lie against a corresponding ring flange 23 of the chamber.
  • These sealing rings are not suitable for absorbing the axial movement which the rotary drum end carries out as a result of the temperature increase occurring at the start of operation from room temperature to up to 600 ° C. if the rotary drum is firmly supported in the axial direction at the other end.
  • the loading chamber 2 is therefore divided into two ring-shaped parts 5 and 6, which are interconnected by an elastic compensator 7 are connected.
  • the part 5 is axially fixed on a support frame 8, while the part 6 is mounted on the same frame via lateral claws 9 so that it can follow the axial movements of the rotary drum end.
  • a rail 19 parallel to the rotary drum axis is connected to the lateral claws 9 and carries two rollers 20, 21 on its end facing away from the loading chamber 2, which rollers can be rotated about axes extending transversely to the rotary drum axis are. They are arranged at a distance from one another so that an annular flange 22 fastened on the outside on the rotary drum 1 can circulate between the two rollers.
  • the displaceability of the chamber part 6 on the support frame is achieved in that three sliders 10, 11, 12 are arranged between the frame 8 and claws 9 arranged on both sides of the chamber part 6, of which the lowest, firmly connected to the frame 8 slider 10th is connected to the middle slide 11 via a spring 13 extending in the longitudinal direction of the rotary drum and engaging in grooves of these two slide pieces, so that these two slide pieces can only move in the longitudinal direction to one another, while the uppermost slide piece firmly connected to a claw 9 of the feed housing 12 is connected to the central slider 11 by means of springs 14 running in the transverse direction and engaging in the grooves of these two sliders, so that these two sliders can only move relative to one another in the transverse direction to the rotary drum 1.
  • the chamber part 6 cannot move arbitrarily in the transverse direction, it is held in its central position by a further guide device, which consists of a at the bottom of the chamber part 6 claw 15 and two sliders 16, 17, which are guided by means of a spring 18 engaging in the longitudinal grooves of the two sliders.
  • the upper slider is thus firmly connected to the claw 15 and the lower to the frame 8, the arrangement being such that the two sliders have a certain distance from one another even in the warm operating state, so that the support of the lateral claws 9 on the frame 8 is guaranteed.
  • the device works as follows: When the rotary drum 1 starts up, it is cold. The hot drying gases pass through the inlet pipe 3 of the feed chamber 2 into the rotary drum and through this to the outlet end, where they exit through the outlet chamber (not shown). The rotary drum heats up and expands in the direction of the feed end, since it is fixed in the axial direction at the outlet end.
  • the ring flange 22 comes to bear against the two rollers 20 and pushes the longitudinally movable part 6 of the loading chamber 2 and the radial ring flange 23 provided thereon, which serves as a contact surface for the sealing rings 24, by the same amount, via the rails 19, around which the ring flange 25 of the rotary drum 1 carrying the sealing rings 24 moves, so that the distance between the two ring flanges practically does not change and the sealing rings are not influenced by temperature changes.
  • the sliders are designed to be substantially longer than they are wide.
  • the ring bottle frees itself after reaching a steady operating state, the movable chamber part 6 remaining due to the weight-related frictional forces between the sliding surfaces, since no external forces act on it, except for the negligible ones Restoring force of the compensator.
  • the movements take place in the opposite way to the explanations for starting up.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

In a rotary drum, such as a rotary tube oven, drum drier or such like, sealing rings are provided for sealing between the rotary drum (1) and a fixed housing part (2), which sealing rings must not be subjected to excessive stresses resulting from axial movements of the rotary drum end to which the sealing rings are fitted. For this purpose, the fixed housing part (2) is designed such that it can move longitudinally and transversely by means of sliding elements (10, 11, 12) guided by slots and springs (13, 14). The longitudinal movement is transmitted by means of rails (19), fitted to the housing part, whose free ends each carry two rollers (20, 21), which are subject to the influence of a ring flange (22) on the rotary drum (1). <IMAGE>

Description

Die Erfindung betrifft eine abdichtende Verbindung zwischen dem längsbeweglich gelagerten Ende der Drehtrommel eines Drehrohrofens, Trommeltrockners oder dergleichen und der dieses Ende umschließenden Kammer, z. B. Beschickungskammer, die aus einem feststehenden Teil und einem mit diesem über einen Kompensator verbundenen, längsbeweglich gelagerten Teil besteht, der einen radialen Ringflansch aufweist, welcher zusammen mit einem entsprechenden Ringflansch der Drehtrommel und zwischen diesen vorgesehenen Dichtungsringen die Abdichtung der Kammer nach außen bewirkt, wobei ein auf dem der Kammer zugewendeten Ende der Drehtrommel angeordneter radialer Ringflansch so auf den längsbeweglichen Teil der Kammer einwirkt, daß dieser entsprechend den Längsbewegungen des Drehtrommelendes verschoben wird.The invention relates to a sealing connection between the longitudinally mounted end of the rotary drum of a rotary kiln, drum dryer or the like and the chamber surrounding this end, for. B. loading chamber, which consists of a fixed part and a part connected to it via a compensator, mounted in a longitudinally movable part, which has a radial ring flange which, together with a corresponding ring flange of the rotary drum and sealing rings provided between them, seals the chamber to the outside, wherein a radial ring flange arranged on the end of the rotary drum facing the chamber acts on the longitudinally movable part of the chamber such that it is displaced in accordance with the longitudinal movements of the rotary drum end.

Bei bekannten Drehtrommeln dieser Art hat man die übertragung der Längsbewegungen des Drehtrommelendes auf den längsbeweglich gelagerten Teil der Kammer über die beiden flach ausgebildeten Dichtungsringe vorgenommen, die auf den radialen Ringflanschen dieses Kammerteils und des Drehtrommelendes befestigt sind. Dabei werden über diese Dichtungsringe erhebliche Kräfte übertragen, weil ständig sowohl die Spannung des Kompensators als auch zusätzliche, gewichts- oder federbelastete Hebel auf den Ringflansch des längsbeweglichen Kammerteils wirken, die die Dichtungsringe zusammenhalten sollen. Dadurch ergeben sich hohe Reibungsverluste und ein starker Verschleiß. Flache Dichtungsringe der verwendeten Art sind außerdem nicht imstande, bei den bei der Drehung der Trommel infolge Durchhängens der Trommel auftretenden Taumelbewegungen des Trommelendes und damit des auf ihm angeordneten radialen Ringflansches eine einwandfreie Dichtung zu bewirken, so daß man zusätzlich eine stärker elastische Lippendichtung vorgesehen hat (DE-AS 25 56 601).In known rotary drums of this type, you have the transmission the longitudinal movements of the rotating drum end on the longitudinally movably mounted part of the chamber via the two flat sealing rings which are fastened to the radial ring flanges of this chamber part and the rotating drum end. Considerable forces are transmitted through these sealing rings because both the tension of the compensator and additional, weight or spring-loaded levers act on the ring flange of the longitudinally movable chamber part, which are intended to hold the sealing rings together. This results in high friction losses and heavy wear. Flat sealing rings of the type used are also unable to provide a perfect seal in the wobbling movements of the drum end resulting from the sagging of the drum and thus the radial ring flange arranged on it, so that a more elastic lip seal has additionally been provided ( DE-AS 25 56 601).

Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile zu vermeiden und eine Bauart zu finden, bei der die Bewegungsübertragung nicht über Dichtungsringe erfolgt, so daß die Abdichtung allein durch Lippendichtungsringe erfolgen kann, die durch die erwähnten Taumelbewegungen des auf dem Drehtrommelende angeordneten radialen Ringflansches entstehenden Abstandsveränderungen der beiden der Abdichtung dienenden Ringflansche ausgleichen können und deshalb stets eine gute Abdichtung bewirken.The invention has for its object to avoid these disadvantages and to find a design in which the movement is not transmitted via sealing rings, so that the sealing can be done only by lip sealing rings, the resulting changes in distance caused by the wobbling movements of the radial ring flange arranged on the rotating drum end can compensate for the two ring flanges used for sealing and therefore always bring about a good seal.

Dies wird erfindungsgemäß dadurch erreicht, daß auf dem Drehtrommelende außer dem der Abdichtung dienenden radialen Ringflansch ein zusätzlicher radialer Ringflansch vorgesehen ist, der über ihn umgreifende Gleitsteine oder Rollen und eine diese tragende Schiene mit dem verschiebbaren Teil der Kammer verbunden ist, und daß zwischen den beiden der Abdichtung nach außen dienenden Ringflanschen ein oder mehrere Lippendichtungsringe vorgesehen sind.This is achieved according to the invention in that an additional radial annular flange is provided on the rotary drum end in addition to the radial annular flange which serves for sealing, the sliding blocks encompassing it or rollers and a rail carrying this is connected to the displaceable part of the chamber, and that one or more lip sealing rings are provided between the two ring flanges serving to seal the outside.

Um Verkantungen zu vermeiden, ist es vorteilhaft, wenn gemäß einer Ausgestaltung der Erfindung auf zwei einander diametral gegenüberliegenden Stellen der Drehtrommel eine solche Verbindung zwischen dem zusätzlichen Ringflansch und dem längsbeweglichen Teil der Kammer vorgesehen ist. Am besten geschieht dies auf beiden Seiten der Drehtrommel, weil die Schienen dann mit den beiden Pratzen verbunden werden können, mit denen der längsbewegliche Kammerteil in bekannter Weise auf einem beidseits der Drehtrommel angeordneten Traggestell verschiebbar gelagert ist. Die Anordnung ist auch deshalb vorteilhaft, weil der zusätzliche Ringflansch an diesen Stellen die geringsten Taumelausschläge macht.In order to avoid canting, it is advantageous if, according to one embodiment of the invention, such a connection is provided between the additional ring flange and the longitudinally movable part of the chamber at two diametrically opposite positions of the rotary drum. This is best done on both sides of the rotating drum, because the rails can then be connected to the two claws with which the longitudinally movable chamber part is slidably mounted in a known manner on a support frame arranged on both sides of the rotating drum. The arrangement is also advantageous because the additional ring flange makes the least wobble at these points.

In jedem Falle ist es aber vorteilhaft, wenn die beiden Gleitsteine oder Rollen jeder Schiene den Ringflansch mit einem Spiel umgreifen, das dem vorhandenen oder im Betrieb auftretenden Taumelschlag des Ringflansches entspricht. Dadurch wird verhindert, daß der längsbewegliche Teil der Kammer jeder kleinen Axialbewegung folgt, die durch einen Taumelschlag des Ringflansches, der sich bei der erwähnten Größe des Drehtrommeldurchmessers praktisch nicht vermeiden läßt, bei jeder Trommelumdrehung hervorgerufen wird.In any case, it is advantageous if the two sliding blocks or rollers of each rail encompass the ring flange with a play that corresponds to the existing or occurring wobble of the ring flange. This prevents the longitudinally movable part of the chamber from following every small axial movement which is caused by a wobble of the ring flange, which is practically unavoidable given the size of the rotating drum diameter, with each drum revolution.

Damit das Spiel dem jeweiligen Taumelschlag angepaßt werden kann, sind die Gleitsteine oder Rollen an der Schiene einstellbar angeordnet.So that the game can be adapted to the respective wobble, the sliding blocks or rollers on the rail are adjustable.

In diesem Zusammenhang ist es außerdem vorteilhaft, wenn der längsbewegliche Teil der Kammer auf dem Traggestell nicht nur - wie bekannt - in Längsrichtung der Drehtrommel, sondern auch quer dazu verschiebbar gelagert ist, damit die Lagerung auch den Durchmesseränderungen des Kammerteiles entsprechen kann, die bei der erheblichen Größe des Trommeldurchmessers und damit auch der Kammer von bis zu 3 Metern berücksichtigt werden müssen. Dies wird erfindungsgemäß dadurch erreicht, daß die Pratzen auf dem Traggestell unter Zwischenschaltung je eines Gleitstückes angeordnet sind, das mittels Nuten und Federn gegen die Pratzen in Querrichtung und gegen das Traggestell in Längsrichtung verschiebbar ist. Die Anordnung kann auch so getroffen werden, daß das Gleitstück gegen die Pratzen in Längsrichtung und gegen das Traggestell in Querrichtung verschiebbar ist.In this context, it is also advantageous if the longitudinally movable part of the chamber on the support frame is not only slidably - as is known - in the longitudinal direction of the rotating drum, but also transversely thereto, so that the storage can also correspond to the changes in diameter of the chamber part, which at considerable size of the drum diameter and thus also the chamber of up to 3 meters must be taken into account. This is achieved according to the invention in that the claws are arranged on the support frame with the interposition of one slide piece each, which can be displaced in the transverse direction and against the support frame in the longitudinal direction by means of grooves and springs. The arrangement can also be made so that the slider against the claws in the longitudinal direction and against the support frame in the transverse direction is displaceable.

Da die Pratzen und das Traggestell im allgemeinen nicht aus einem Material bestehen, das sich für Gleitflächen eignet, ist es vorteilhaft, wenn zwischen dem Gleitstück einerseits und den Pratzen bzw. dem Traggestell andererseits noch je ein weiteres Gleitstück vorgesehen ist, das mit der Pratze bzw. mit dem Traggestell fest verbunden ist.Since the claws and the support frame generally do not consist of a material that is suitable for sliding surfaces, it is advantageous if a further slide piece is provided between the slide piece on the one hand and the claws or the support frame on the other hand, which can be attached to the claw or is firmly connected to the support frame.

Es empfiehlt sich weiterhin, den längsbeweglichen Kammerteil zusätzlich zu den seitlichen Lagerungen mittig zu halten, um stärkere seitliche Bewegungen auf dem Traggestell zu verhindern, die eine unnötige und gegebenenfalls unzulässige Belastung des die beiden Kammerteile verbindenden, aus elastischem Werkstoff bestehenden ringförmigen Kompensators oder eine den Betrieb störende Berührung der rotierenden Trommel mit der nicht rotierenden Kammer zur Folge haben würden. Hierzu dient eine in Längsrichtung der Drehtrommel verlaufende Feder, die nach oben in eine Nut eines unter dem längsbeweglichen Kammerteil an diesem befestigten Schuhes mit einem die Wärmedehnung berücksichtigenden radialen Spiel und nach unten in eine entsprechende Nut des Traggestells eingreift.It is also advisable to hold the longitudinally movable chamber part in the middle in addition to the lateral bearings in order to prevent stronger lateral movements on the supporting frame, which unnecessarily and possibly impermissibly stress the annular compensator, which consists of elastic material and connects the two chamber parts, or the operation disturbing contact of the rotating drum with the non-rotating chamber would result. A spring running in the longitudinal direction of the rotary drum serves for this purpose, which engages upwards in a groove of a shoe fastened to it under the longitudinally movable chamber part with a radial play which takes thermal expansion into account and downwards in a corresponding groove in the supporting frame.

In der Zeichnung ist das Beschickungsende eines Trommeltrockners dargestellt, und zwar Fig. 1 in Seitenansicht und in Fig. 2 im Teilschnitt gemäß der Linie II-II in Fig. 1.The drawing shows the loading end of a tumble dryer, namely FIG. 1 in a side view and in FIG. 2 in a partial section along the line II-II in FIG. 1.

Die Drehtrommel ist mit 1 bezeichnet. Sie ist leicht gegen die Horizontale geneigt und mittels nicht dagestellter Laufringe und Rollenstationen um ihre Längsachse drehbar gelagert. Sie ragt mit ihrem nicht dargestellten Ende in eine Auslaufkammer, durch die auch die feuchten Trocknungsgase abgesaugt werden, und mit dem dargestellten Ende in eine Beschickungskammer 2 hinein, an die sich das Eintrittsrohr 3 für die heißen Trocknungsgase anschließt. In dieses führt ein Rohr 4 hinein, durch das das zu trocknende Gut aufgegeben wird.The rotary drum is labeled 1. It is slightly inclined against the horizontal and is rotatable about its longitudinal axis by means of races and roller stations (not shown). It protrudes with its end, not shown, into an outlet chamber, through which the moist drying gases are also drawn off, and with the illustrated end into a charging chamber 2, to which the inlet pipe 3 for the hot drying gases is connected. A pipe 4 leads into this, through which the material to be dried is given up.

Die Beschickungskammer 2 ist gegenüber der Drehtrommel 1 gut abgedichtet. Hierzu sind an einem vor der Stirnseite der Kammer 2 befindlichen radialen Ringflansch 25 der Drehtrommel lippenartige Dichtungsringe 24 vorgesehen, die sich gegen einen entsprechenden Ringflansch 23 der Kammer anlegen. Diese Dichtungsringe sind nicht geeignet, die axiale Bewegung aufzunehmen, die das Drehtrommelende infolge der bei Betriebsbeginn erfolgenden Temperaturerhöhung von Raumtemperatur auf bis zu 600°C ausführt, wenn die Drehtrommel am anderen Ende in axialer Richtung fest gelagert ist. Die Beschickungskammer 2 ist daher in zwei ringförmige Teile 5 und 6 unterteilt, die durch einen elastischen Kompensator 7 miteinander verbunden sind. Der Teil 5 ist dabei axial fest auf einem Traggestell 8 angeordnet, während der Teil 6 auf demselben Gestell über seitliche Pratzen 9 verschiebbar gelagert ist, damit er den axialen Bewegungen des Drehtrommelendes folgen kann. Zur Übertragung der axialen Bewegungen des Drehtrommelendes auf den Kammerteil 6 ist mit den seitlichen Pratzen 9 je eine zur Drehtrommelachse parallele Schiene 19 verbunden, die an ihrem von der Beschickungskammer 2 weggerichteten Ende zwei Rollen 20, 21 trägt, die um quer zur Drehtrommelachse verlaufende Achsen drehbar sind. Sie sind mit Abstand voneinander angeordnet, so daß ein außen auf der Drehtrommel 1 befestigter Ringflansch 22 zwischen den beiden Rollen umlaufen kann.The feed chamber 2 is well sealed with respect to the rotary drum 1. For this purpose, lip-like sealing rings 24 are provided on a radial ring flange 25 of the rotary drum located in front of the end face of the chamber 2, which lie against a corresponding ring flange 23 of the chamber. These sealing rings are not suitable for absorbing the axial movement which the rotary drum end carries out as a result of the temperature increase occurring at the start of operation from room temperature to up to 600 ° C. if the rotary drum is firmly supported in the axial direction at the other end. The loading chamber 2 is therefore divided into two ring-shaped parts 5 and 6, which are interconnected by an elastic compensator 7 are connected. The part 5 is axially fixed on a support frame 8, while the part 6 is mounted on the same frame via lateral claws 9 so that it can follow the axial movements of the rotary drum end. In order to transmit the axial movements of the rotary drum end to the chamber part 6, a rail 19 parallel to the rotary drum axis is connected to the lateral claws 9 and carries two rollers 20, 21 on its end facing away from the loading chamber 2, which rollers can be rotated about axes extending transversely to the rotary drum axis are. They are arranged at a distance from one another so that an annular flange 22 fastened on the outside on the rotary drum 1 can circulate between the two rollers.

Die Verschiebbarkeit des Kammerteils 6 auf dem Traggestell wird dadurch erreicht, daß zwischen dem Gestell 8 und beiderseits an dem Kammerteil 6 angeordneten Pratzen 9 je drei Gleitstücke 10, 11, 12 angeordnet sind, von denen das unterste, mit dem Gestell 8 fest verbundene Gleitstück 10 mit dem mittleren Gleitstück 11 über eine in Längsrichtung der Drehtrommel verlaufende, in Nuten dieser beiden Gleitstücke eingreifende Feder 13 verbunden ist, so daß sich diese beiden Gleitstücke nur in Längsrichtung zueinander bewegen können, während das oberste, mit einer Pratze 9 des Aufgabegehäuses fest verbundene Gleitstück 12 mit dem mittleren Gleitstück 11 über in Querrichtung verlaufende, in Nuten dieser beiden Gleitstücke eingreifende Federn 14 verbunden ist, so daß sich diese beiden Gleitstücke nur in Querrichtung zur Drehtrommel 1 zueinander bewegen können.The displaceability of the chamber part 6 on the support frame is achieved in that three sliders 10, 11, 12 are arranged between the frame 8 and claws 9 arranged on both sides of the chamber part 6, of which the lowest, firmly connected to the frame 8 slider 10th is connected to the middle slide 11 via a spring 13 extending in the longitudinal direction of the rotary drum and engaging in grooves of these two slide pieces, so that these two slide pieces can only move in the longitudinal direction to one another, while the uppermost slide piece firmly connected to a claw 9 of the feed housing 12 is connected to the central slider 11 by means of springs 14 running in the transverse direction and engaging in the grooves of these two sliders, so that these two sliders can only move relative to one another in the transverse direction to the rotary drum 1.

Damit sich der Kammerteil 6 nicht beliebig in Querrichtung bewegen kann, ist er in seiner mittigen Lage durch eine weitere Führungseinrichtung gehalten, die aus einer unten am Kammerteil 6 befestigten Pratze 15 und zwei Gleitstücken 16, 17 besteht, die mittels einer in Längsnuten der beiden Gleitstücke eingreifenden Feder 18 geführt werden. Das obere Gleitstück ist damit mit der Pratze 15 und das untere mit dem Gestell 8 fest verbunden, wobei die Anordnung so getroffen ist, daß die beiden Gleitstücke auch in betriebswarmen Zustand einen gewissen Abstand voneinander haben, damit die Auflage der seitlichen Pratzen 9 auf dem Gestell 8 gewährleistet ist.So that the chamber part 6 cannot move arbitrarily in the transverse direction, it is held in its central position by a further guide device, which consists of a at the bottom of the chamber part 6 claw 15 and two sliders 16, 17, which are guided by means of a spring 18 engaging in the longitudinal grooves of the two sliders. The upper slider is thus firmly connected to the claw 15 and the lower to the frame 8, the arrangement being such that the two sliders have a certain distance from one another even in the warm operating state, so that the support of the lateral claws 9 on the frame 8 is guaranteed.

Die Wirkungsweise der Vorrichtung ist folgendermaßen:
Beim Anfahren der Drehtrommel 1 ist diese kalt. Durch das Eintrittsrohr 3 der Beschickungskammer 2 gelangen die heißen Trocknungsgase in die Drehtrommel und durch diese hindurch zum Auslaufende, wo sie durch die nicht gezeigte Auslaufkammer austreten. Dabei erwärmt sich die Drehtrommel und dehnt sich, da sie am Auslaufende in axialer Richtung fest gelagert ist, in Richtung auf das Aufgabeende entsprechend aus. Dadurch kommt der Ringflansch 22 zur Anlage gegen die beiden Rollen 20 und schiebt über die Schienen 19 den längsbeweglichen Teil 6 der Beschickungskammer 2 und den daran vorgesehenen radialen Ringflansch 23, der als Anlagefläche für die Dichtungsringe 24 dient, um den gleichen Betrag vor sich her, um den sich der die Dichtungsringe 24 tragende Ringflansch 25 der Drehtrommel 1 bewegt, so daß der Abstand zwischen den beiden Ringflanschen praktisch nicht verändert und die Dichtungsringe durch Temperaturveränderungen nicht beeinflußt werden.The device works as follows:
When the rotary drum 1 starts up, it is cold. The hot drying gases pass through the inlet pipe 3 of the feed chamber 2 into the rotary drum and through this to the outlet end, where they exit through the outlet chamber (not shown). The rotary drum heats up and expands in the direction of the feed end, since it is fixed in the axial direction at the outlet end. As a result, the ring flange 22 comes to bear against the two rollers 20 and pushes the longitudinally movable part 6 of the loading chamber 2 and the radial ring flange 23 provided thereon, which serves as a contact surface for the sealing rings 24, by the same amount, via the rails 19, around which the ring flange 25 of the rotary drum 1 carrying the sealing rings 24 moves, so that the distance between the two ring flanges practically does not change and the sealing rings are not influenced by temperature changes.

Bei dieser Längsbewegung des Aufgabeendes der Drehtrommel 1 verschieben sich die beiden mit den Pratzen 9 fest verbundenen oberen Gleitstücke 12 zusammen mit den mit ihnen über Querfedern 14 gekuppelten mittleren Gleitstücken 11 auf den unteren, mit dem Gestell 8 fest verbundenen Gleitstücken 10, wobei sie durch die in Längsrichtung verlaufenden Federn 13 und die unter dem Kammerteil 6 angeordnete, ebenfalls in Längsrichtung verlaufende Feder 18 geführt werden.During this longitudinal movement of the feed end of the rotary drum 1, the two upper slide pieces 12, which are firmly connected to the claws 9, move together with the them via transverse springs 14 coupled middle sliders 11 on the lower, firmly connected to the frame 8 sliders 10, wherein they are guided by the longitudinally extending springs 13 and the arranged under the chamber part 6, also longitudinally extending spring 18.

Da die Beschickungskammer 5, 6 im Betrieb ebenfalls stark erhitzt wird, verändert sich auch ihr Durchmesser nicht unbeträchtlich. Diesem Umstand trägt die Koppelung der beiden oberen Gleitstücke 12 mit den mittleren Gleitstücke 11 durch querverlaufende Federn 14 Rechnung, denn dadurch können sich die oberen Gleitstücke 12 entsprechend der radialen Ausdehnung der Kammer nach außen bewegen, so daß Verklemmungen nicht auftreten.Since the feed chamber 5, 6 is also strongly heated during operation, its diameter also changes not inconsiderably. This fact takes into account the coupling of the two upper sliding pieces 12 with the middle sliding pieces 11 by transverse springs 14, because this allows the upper sliding pieces 12 to move outwards in accordance with the radial expansion of the chamber, so that jamming does not occur.

Da die Längsbewegungen im Verhältnis zu den Querbewegungen erheblich größer sind, ist es vorteilhaft, wenn die Gleitstücke wesentlich länger als breit ausgebildet sind.Since the longitudinal movements are considerably larger in relation to the transverse movements, it is advantageous if the sliders are designed to be substantially longer than they are wide.

Durch das Spiel zwischen den Rollen 20, 21 und dem Ringflansch 22 läuft sich der Ringflasch nach Erreichen eines stationären Betriebszustandes frei, wobei der bewegliche Kammerteil 6 durch die gewichtsbedingten Reibungskräfte zwischen den Gleitflächen stehen bleibt, da auf ihn keine äußeren Kräfte wirken außer der diesbezüglich vernachlässigbaren Rückstellkraft des Kompensators. Beim Abfahren der Trommel laufen die Bewegungen analog zu den Erläuterungen zum Anfahren in umgekehrter Weise ab.Due to the play between the rollers 20, 21 and the ring flange 22, the ring bottle frees itself after reaching a steady operating state, the movable chamber part 6 remaining due to the weight-related frictional forces between the sliding surfaces, since no external forces act on it, except for the negligible ones Restoring force of the compensator. When the drum is moved down, the movements take place in the opposite way to the explanations for starting up.

Claims (6)

  1. A sealing connection between the longitudinally-movable mounted end of the rotary drum of a rotary kiln, rotary dryer or similar, and the chamber encompassing this end, e.g. a feed chamber, comprising a fixed part, connected to which by a compensator is a longitudinally-movable mounted part having a radial circular flange, which together with a corresponding circular flange of the rotary drum and sealing rings provided in between effects the seal of the chamber to the outside, whereby a radial circular flange arranged on the end of the rotary drum facing towards the chamber acts on the longitudinally-movable part of the chamber in such a way that the latter is shifted according to the longitudinal movements of the rotary drum end, characterised in that as last-named circular flange a further radial circular flange (22) is provided on the end of the rotary drum in addition to the circular flange (25) acting as a seal, said flange (22) being gripped by guide blocks or rollers (20, 21) and connected by a rail (19) bearing the guide blocks or rollers to the movable part (6) of the chamber (5, 6, 7), and that one or more lip sealing rings (24) are provided between the circular flanges (23, 25) serving as seals to the outside.
  2. A connection according to claim 1, characterised in that the two guide blocks or rollers (20, 21) of each rail (19) embrace the circular flange (22) with a certain amount of play corresponding to the inherent or operationally-ensuing wobble of the circular flange.
  3. A connection according to claim 2, characterised in that the guide blocks or rollers (20, 21) are adjustably arranged on the rail (19).
  4. A connection according to claim 1, characterised in that the rails (19) are fixed to brackets (9), by means of which the longitudinally-movable part (6) of the chamber (5, 6, 7) is movably mounted in the known manner on both sides on bearing frames (8).
  5. A connection according to claim 4, characterised in that between each of the brackets (9) arranged on the bearing frame (8) is a slide piece (11), which by means of slots and feathers (14, 13) is transversely movable with respect to the brackets or a slide piece (12) attached thereto, and longitudinally movable in respect to the bearing frame or a slide piece (10) attached thereto.
  6. A connection according to claim 5, characterised in that the longitudianlly movable part (6) of the chamber (5, 6, 7) is additionally guided centrally at the bottom by means of a feather (18) on the bearing frame (8) running in the longitudinal direction.
EP87100078A 1986-02-14 1987-01-07 Rotary drum Expired - Lifetime EP0233448B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100078T ATE73924T1 (en) 1986-02-14 1987-01-07 ROTARY DRUM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3604651 1986-02-14
DE19863604651 DE3604651A1 (en) 1986-02-14 1986-02-14 TURN DRUM

Publications (3)

Publication Number Publication Date
EP0233448A2 EP0233448A2 (en) 1987-08-26
EP0233448A3 EP0233448A3 (en) 1989-03-15
EP0233448B1 true EP0233448B1 (en) 1992-03-18

Family

ID=6294079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100078A Expired - Lifetime EP0233448B1 (en) 1986-02-14 1987-01-07 Rotary drum

Country Status (7)

Country Link
EP (1) EP0233448B1 (en)
JP (1) JPS62194183A (en)
AT (1) ATE73924T1 (en)
CS (1) CS266340B2 (en)
DE (2) DE3604651A1 (en)
PL (1) PL150554B1 (en)
TR (1) TR23248A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4622408B2 (en) * 2004-09-16 2011-02-02 三菱マテリアル株式会社 Pressure vessel
CN113237323B (en) * 2021-04-29 2023-07-14 安徽省泽乾冶金科技有限公司 Rotary kiln sealing device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE452953C (en) * 1927-11-25 Fried Krupp Grusonwerk Akt Ges Seal for drums rotating in a fixed housing
US1500589A (en) * 1922-05-29 1924-07-08 Huron Ind Inc Gasket for rotating kilns
US2632658A (en) * 1948-12-30 1953-03-24 Traylor Engineering & Mfg Comp Sealing ring for rotary kilns
DE1805548U (en) * 1956-06-19 1960-02-04 Buckau Wolf Maschf R HEATED ROTATING DRUM WITH SEALED FAILURE HOUSING.
DE1192967B (en) * 1961-08-26 1965-05-13 Beteiligungs & Patentverw Gmbh Sealing on rotary tubes
GB1466143A (en) * 1973-06-09 1977-03-02 Kobe Steel Ltd Rotary kiln
US3940239A (en) * 1974-12-16 1976-02-24 Allis-Chalmers Corporation Rotary reducing kiln seal
DE3320192A1 (en) * 1983-06-03 1984-12-06 Kiener-Pyrolyse Gesellschaft für thermische Abfallverwertung mbH, 7000 Stuttgart Rotary drum for the treatment of bulk material

Also Published As

Publication number Publication date
DE3604651A1 (en) 1987-08-20
ATE73924T1 (en) 1992-04-15
PL150554B1 (en) 1990-06-30
CS266340B2 (en) 1989-12-13
CS75387A2 (en) 1988-09-16
DE3777423D1 (en) 1992-04-23
EP0233448A3 (en) 1989-03-15
JPS62194183A (en) 1987-08-26
PL264098A1 (en) 1987-12-28
EP0233448A2 (en) 1987-08-26
TR23248A (en) 1989-07-24

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