EP0062742B1 - Seal for the joint between a rotary kiln and its firing hood - Google Patents

Seal for the joint between a rotary kiln and its firing hood Download PDF

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Publication number
EP0062742B1
EP0062742B1 EP82101063A EP82101063A EP0062742B1 EP 0062742 B1 EP0062742 B1 EP 0062742B1 EP 82101063 A EP82101063 A EP 82101063A EP 82101063 A EP82101063 A EP 82101063A EP 0062742 B1 EP0062742 B1 EP 0062742B1
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EP
European Patent Office
Prior art keywords
ring
rotary kiln
ring element
stationary
annular
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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
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EP82101063A
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German (de)
French (fr)
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EP0062742A1 (en
Inventor
Heinz Ing. Grad. Grachtrup
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Publication of EP0062742A1 publication Critical patent/EP0062742A1/en
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/903—Seal for rotating kiln or drum

Definitions

  • the invention relates to a device for sealing the gap between the inlet end of a rotary kiln and a stationary inlet housing with the features according to the preamble of claim 1.
  • the slidable ring has a certain axial displaceability in the known designs and is also pressed by the pressure-actuated cylinder in the direction of the inlet end of the rotary kiln.
  • the freedom of movement of the sliding ring is not sufficient to ensure that the two wear surfaces (the to be held on the one hand by the sliding ring and on the other hand by the ring rotating with the rotary kiln) in sealing contact.
  • the invention is therefore based on the object, while avoiding these disadvantages of the known designs, to provide a device of the type mentioned which is distinguished by a particularly large range of motion of the sliding ring and which thus also has a very good length, even when cooled, by rotary tube furnaces of very great length the gap between the inlet end of the rotary kiln and the fixed inlet housing guaranteed.
  • the slidable ring consists of several, preferably two, concentrically arranged and telescopic relative to each other in the axial direction slidable ring elements, of which the inner ring element is supported via the first sealing element on the fixed ring, while that supports the first wear surface of the outer ring element via a second ring-shaped sealing element on the inner ring element.
  • the gap sealing device illustrated in the drawing is provided in the transition area from a stationary inlet housing, of which only the outer wall 1 can be seen in FIG. 1, and the inlet end 2a of a rotary kiln 2, which is only indicated, in order to seal the gap 3 present there from the outside .
  • a fixed ring 4 is fixedly attached, which extends from this wall 1 in the axial direction to the rotary kiln inlet end 2a and which is essentially cylindrical.
  • a circumferential circumferential, outwardly open ring channel 5 is formed, in which an annular sealing element 6 (e.g. asbestos cord or the like) extending over the entire ring circumference. ) is arranged.
  • movable ring 8 On the outside of the fixed ring 4, a non-rotatable, but slidable in the axial direction (double arrow 7) movable ring 8 is arranged.
  • This slidable ring 8 can consist of several concentrically arranged and telescopically relative to each other the ring elements slidably movable in the axial direction; In the illustrated embodiment, this slidable ring 8 consists of an inner ring element 9 and an outer ring element 10 (ie preferably two such ring elements).
  • the inner ring element 9 is supported by a first ring-shaped sealing element 11 on the fixed ring 4, this first sealing element 11 being arranged on the inner circumferential side of the end of this ring element 9 directed against the inlet housing wall 1 in a circumferential, inwardly open ring channel 12.
  • the outer ring element 10 is supported on the outer circumferential side of the inner ring element 9 via a second ring-shaped sealing element 13.
  • This second sealing element 13 is also held in a circumferential ring channel 14 - in this case the outer ring element 10 - which is open towards the inner ring element 9.
  • the outer ring element 10 of the slidable ring 8 carries on its end facing the rotary kiln 2 a first wear surface 15a which is formed by a wear ring 15 which is firmly connected to the outer ring element 10 (e.g. by screwing or riveting).
  • a second wear surface 16a of a second wear ring 16 Opposed to this first wear surface 15a is a second wear surface 16a of a second wear ring 16 which comes into sealing contact therewith, which is held in a rotationally fixed manner by a ring 17, which in turn is attached in a rotationally fixed manner to the inlet end 2a of the rotary kiln 2.
  • the wear rings 15 and 16 are made in the usual way from a suitable material (for example steel ST 37) and either in one piece or - which is generally preferred - from ring segments.
  • a plurality of pressure-medium-actuated cylinders e.g. pneumatic cylinders 18 which act between the inlet housing (wall 1) and the sliding ring 8 and which move the sliding ring 8 towards the inlet end 2a of the rotary kiln 2 press and hold the two wearing surfaces 15a and 16a in sealing contact with each other.
  • the cylinders 18 are carried by the outer ring element 10, in that this outer ring element 10 has an annular disk 19 with a significantly larger outer diameter than the other parts, the cylinders 18 then being fastened (preferably screwed) to the outer circumference of this annular disk 19, that they are supported with the free ends 20a of their piston rods 20 on the outer inlet housing wall 1 or on abutments 21 provided there (correspondingly distributed in the circumferential direction).
  • the cylinders 18 are surrounded by a heat shield 22 at least in their areas facing the rotary kiln 2.
  • a stop device 23 is attached, which limits the maximum pull-out movement of the ring element 10 by interacting with the stop device 23 via its ring channel 14.
  • This stop device 23 can be formed either by a circumferential ring or by a number of relatively short ring sections.
  • the outer ring element 10 has on its outer circumference two mounting joints 24, 25, which make this ring element 10 axially slidable, but non-rotatably via a suspension device 26, 27 on the stationary one Hold the inlet housing wall 1.
  • These mounting joints are expediently attached to the annular disk 19 in two circumferentially approximately opposite regions (as shown in FIG. 2).
  • the suspension devices for the outer ring element 10 are essentially formed by suspension rods 26, 27, which can be adjusted in their effective carrying length - in particular by screws - and are provided with fastening plates 28, 29, which are screwed into the outer inlet housing wall 1 at appropriate points or in can be attached in any other way.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Abdichtung des Spaltes zwischen dem Einlaufende eines Drehrohrofens und einem ortsfesten Einlaufgehäuse mit den Merkmalen entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a device for sealing the gap between the inlet end of a rotary kiln and a stationary inlet housing with the features according to the preamble of claim 1.

Im Hinblick auf die großen Längen moderner Drehrohröfen sowie unter Berücksichtigung der beträchtlichen Temperaturunterschiede zwischen dem Betriebszustand und dem erkalteten Zustand einer solchen Ofenanlage ergeben sich - durch Wärmedehnungen bedingt - erhebliche Lageänderungen des Einlaufendes des Drehrohrofens beim Übergang vom Betriebszustand in den erkalteten Zustand und umgekehrt. Da die am Einlaufende des Drehrohrofens abgezogenen Ofenabgase üblicherweise in einem dem Drehrohrofen vorgeschalteten Wärmetauscher zur Vorwärmung des Rohmateriales verwendet werden, muß für eine einwandfreie Abdichtung des Spaltes zwischen dem Einlaufende des Drehrohrofens und dem ortsfesten Einlaufgehäuse gesorgt werden, um hier einen unerwünschten Falschlufteintritt zu verhindern. Diese Abdichtung soll nicht nur nach Erreichen des normalen Betriebszustandes (bei warmer Drehrohrofenanlage), sondern auch schon beim Anfahren der dann noch weitgehend kalten Anlage gewährleistet sein.In view of the long lengths of modern rotary kilns and taking into account the considerable temperature differences between the operating state and the cooled state of such a furnace system, there are considerable changes in position of the inlet end of the rotary kiln during the transition from the operating state to the cooled state and vice versa, due to thermal expansion. Since the furnace exhaust gases drawn off at the inlet end of the rotary kiln are usually used in a heat exchanger upstream of the rotary kiln to preheat the raw material, a proper seal of the gap between the inlet end of the rotary kiln and the stationary inlet housing must be ensured in order to prevent undesired entry of false air here. This seal should not only be guaranteed after the normal operating state has been reached (with a warm rotary kiln system), but also when the system, which is still largely cold, is started up.

In der Praxis zeigt sich nun jedoch, daß diese Forderung von den bekannten Ausführungen nicht in ausreichendem Maße erfüllt wird. Der gleitbewegliche Ring besitzt zwar bei den bekannten Ausführungen eine gewisse axiale Verschiebbarkeit und wird auch durch die druckmittelbetätigten Zylinder in Richtung auf das Einlaufende des Drehrohrofens gedrückt. Bei einer besonders großen Lageänderung des Drehrohrofens (bedingt durch eine große Ofenlänge) reicht jedoch bei den bekannten Ausführungen der Bewegungsspielraum des gleitbeweglichen Ringes nicht aus, um auch im erkalteten Zustand der Ofenanlage (und damit beim besonders kritischen Wiederanfahren der Ofenanlage) die beiden Schleißflächen (die einerseits vom gleitbeweglichen Ring und andererseits von dem mit dem Drehrohrofen drehenden Ring getragen werden) in dichtender Berührung zu halten.In practice, however, it turns out that this requirement is not sufficiently met by the known designs. The slidable ring has a certain axial displaceability in the known designs and is also pressed by the pressure-actuated cylinder in the direction of the inlet end of the rotary kiln. In the case of a particularly large change in the position of the rotary kiln (due to a large kiln length), however, in the known designs, the freedom of movement of the sliding ring is not sufficient to ensure that the two wear surfaces (the to be held on the one hand by the sliding ring and on the other hand by the ring rotating with the rotary kiln) in sealing contact.

Eine Vergrößerung der Länge des feststehenden Ringes und damit eine entsprechende Vergrößerung des Hubes des gleitbeweglichen Ringes läßt sich andererseits in konstruktiver Hinsicht nur schwer verwirklichen, da dies die Gestaltung der das Gut dem Drehrohrofen zuführenden Einlaufschurre sehr ungünstig (nämlich im Sinne einer Verringerung des Neigungswinkels dieser Schurre) beeinflussen würde.An increase in the length of the fixed ring and thus a corresponding increase in the stroke of the slidable ring, on the other hand, is difficult to achieve from a design point of view, since this makes the design of the inlet chute feeding the material to the rotary kiln very unfavorable (namely in the sense of reducing the angle of inclination of this chute ) would affect.

Der Erfindung liegt daher die Aufgabe zugrunde, unter Vermeidung dieser Nachteile der bekannten Ausführungen eine Vorrichtung der eingangs genannten Art zu schaffen, die sich durch einen besonders großen Bewegungsbereich des gleitbeweglichen Ringes auszeichnet und die damit auch im erkalteten Zustand von Drehrohröfen sehr großer Länge eine einwandfreie Abdichtung des Spaltes zwischen dem Einlaufende des Drehrohrofens und dem ortsfesten Einlaufgehäuse gewährleistet.The invention is therefore based on the object, while avoiding these disadvantages of the known designs, to provide a device of the type mentioned which is distinguished by a particularly large range of motion of the sliding ring and which thus also has a very good length, even when cooled, by rotary tube furnaces of very great length the gap between the inlet end of the rotary kiln and the fixed inlet housing guaranteed.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der gleitbewegliche Ring aus mehreren, vorzugsweise zwei, konzentrisch zueinander angeordneten und teleskopartig relativ zueinander in axialer Richtung gleitbeweglichen Ringelementen besteht, von denen sich das innere Ringelement über das erste Dichtungselement auf dem feststehenden Ring abstützt, während sich das die erste Schleißfläche tragende äußere Ringelement über ein zweites ringförmiges Dichtungselement auf dem inneren Ringelement abstützt.This object is achieved in that the slidable ring consists of several, preferably two, concentrically arranged and telescopic relative to each other in the axial direction slidable ring elements, of which the inner ring element is supported via the first sealing element on the fixed ring, while that supports the first wear surface of the outer ring element via a second ring-shaped sealing element on the inner ring element.

Durch die erfindungsgemäße Lösung wird - ohne Vergrößerung der Länge des feststehenden Ringes und damit ohne Beeinträchtigung der optimalen Konstruktion der Einlaufschurre - der Bewegungsbereich des gleitbeweglichen Ringes wesentlich vergrößert. Damit bleiben die beiden Schleißflächen unter allen Umständen, insbesondere auch im erkalteten Zustand von Drehrohröfen sehr großer Länge, miteinander in dichtender Berührung.The solution according to the invention - without increasing the length of the fixed ring and thus without impairing the optimal construction of the inlet chute - significantly increases the range of motion of the sliding ring. In this way, the two wearing surfaces remain in sealing contact with one another under all circumstances, in particular even when the rotary tube furnaces are very long.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche und werden im Zusammenhang mit der Beschreibung eines Ausführungsbeispieles näher erläutert. In der Zeichnung zeigt

  • Fig. 1 eine Teil-Längsschnittansicht durch die Spaltabdichtungsvorrichtung (etwa entlang der Linie I-I in Fig. 2);
  • Fig. 2 eine Querschnittsansicht entlang der Linie 11-11 in Fig. 1.
Appropriate embodiments of the invention are the subject of the dependent claims and are explained in connection with the description of an embodiment. In the drawing shows
  • Figure 1 is a partial longitudinal sectional view through the gap sealing device (approximately along the line II in Fig. 2).
  • FIG. 2 is a cross-sectional view taken along line 11-11 in FIG. 1.

Die in der Zeichnung veranschaulichte Spaltabdichtungsvorrichtung ist im Übergangsbereich von einem ortsfesten Einlaufgehäuse, von dem in Fig. 1 lediglich die äußere Wand 1 zu sehen ist, und dem Einlaufende 2a eines nur angedeuteten Drehrohrofens 2 vorgesehen, um den dort vorhandenen Spalt 3 nach außen hin abzudichten.The gap sealing device illustrated in the drawing is provided in the transition area from a stationary inlet housing, of which only the outer wall 1 can be seen in FIG. 1, and the inlet end 2a of a rotary kiln 2, which is only indicated, in order to seal the gap 3 present there from the outside .

Am Einlaufgehäuse bzw. an dessen äußerer Wand 1 ist ein feststehender Ring 4 fest angebracht, der sich von dieser Wand 1 aus in axialer Richtung auf das Drehrohrofeneinlaufende 2a erstreckt und der im wesentlichen zylindrisch ausgebildet ist. Auf der Außenumfangsseite des gegen den Drehrohrofen 2 gerichteten freien Endes 4a dieses Ringes 4 ist ein in Umfangsrichtung umlaufender, nach außen hin offener Ringkanal 5 ausgebildet, in dem ein über den ganzen Ringumfang verlaufendes, ringförmiges Dichtungselement 6 (z. B. Asbestschnur oder dgl.) angeordnet ist.On the inlet housing or on its outer wall 1, a fixed ring 4 is fixedly attached, which extends from this wall 1 in the axial direction to the rotary kiln inlet end 2a and which is essentially cylindrical. On the outer circumferential side of the free end 4a of this ring 4 directed against the rotary kiln 2, a circumferential circumferential, outwardly open ring channel 5 is formed, in which an annular sealing element 6 (e.g. asbestos cord or the like) extending over the entire ring circumference. ) is arranged.

Auf der Außenseite des feststehenden Ringes 4 ist ein drehfester, jedoch in axialer Richtung (Doppelpfeil 7) verschiebbarer, gleitbeweglicher Ring 8 angeordnet. Dieser gleitbewegliche Ring 8 kann aus mehreren konzentrisch zueinander angeordneten und teleskopartig relativ zueinander in axialer Richtung gleitbeweglichen Ringelementen zusammengesetzt sein; im veranschaulichten Ausführungsbeispiel besteht dieser gleitbewegliche Ring 8 aus einem inneren Ringelement 9 und einem äußeren Ringelement 10 (also vorzugsweise aus zwei solchen Ringelementen).On the outside of the fixed ring 4, a non-rotatable, but slidable in the axial direction (double arrow 7) movable ring 8 is arranged. This slidable ring 8 can consist of several concentrically arranged and telescopically relative to each other the ring elements slidably movable in the axial direction; In the illustrated embodiment, this slidable ring 8 consists of an inner ring element 9 and an outer ring element 10 (ie preferably two such ring elements).

Das innere Ringelement 9 stützt sich über ein erstes ringförmiges Dichtungselement 11 auf dem feststehenden Ring 4 ab, wobei dieses erste Dichtungselement 11 auf der Innenumfangsseite des gegen die Einlaufgehäusewand 1 gerichteten Endes dieses Ringelementes 9 in einem umlaufenden, nach innen offenen Ringkanal 12 angeordnet ist.The inner ring element 9 is supported by a first ring-shaped sealing element 11 on the fixed ring 4, this first sealing element 11 being arranged on the inner circumferential side of the end of this ring element 9 directed against the inlet housing wall 1 in a circumferential, inwardly open ring channel 12.

Auf der Außenumfangsseite des inneren Ringelementes 9 stützt sich das äußere Ringelement 10 über ein zweites ringförmiges Dichtungselement 13 ab. Auch dieses zweite Dichtungselement 13 wird in einem in Umfangsrichtung umlaufenden Ringkanal 14 - in diesem Falle des äußeren Ringelements 10 - gehalten, der gegen das innere Ringelement 9 hin offen ist.The outer ring element 10 is supported on the outer circumferential side of the inner ring element 9 via a second ring-shaped sealing element 13. This second sealing element 13 is also held in a circumferential ring channel 14 - in this case the outer ring element 10 - which is open towards the inner ring element 9.

Das äußere Ringelement 10 des gleitbeweglichen Ringes 8 trägt an seiner dem Drehrohrofen 2 zugewandten Stirnseite eine erste Schleißfläche 15a, die von einem Schleißring 15 gebildet wird, der fest mit dem äußeren Ringelement 10 verbunden ist (z. B. durch Aufschrauben oder Aufnieten). Dieser ersten Schleißfläche 15a liegt eine damit dichtend in Berührung kommende zweite Schleißfläche 16a eines zweiten Schleißringes 16 gegenüber, der drehfest von einem Ring 17 getragen wird, der seinerseits am Einlaufende 2a des Drehrohrofens 2 drehfest angebracht ist. Die Schleißringe 15 und 16 sind in üblicher Weise aus einem geeigneten Material (z. B. Stahl ST 37) sowie entweder einstückig durchlaufend oder - was im allgemeinen bevorzugt wird - aus Ringsegmenten hergestellt.The outer ring element 10 of the slidable ring 8 carries on its end facing the rotary kiln 2 a first wear surface 15a which is formed by a wear ring 15 which is firmly connected to the outer ring element 10 (e.g. by screwing or riveting). Opposed to this first wear surface 15a is a second wear surface 16a of a second wear ring 16 which comes into sealing contact therewith, which is held in a rotationally fixed manner by a ring 17, which in turn is attached in a rotationally fixed manner to the inlet end 2a of the rotary kiln 2. The wear rings 15 and 16 are made in the usual way from a suitable material (for example steel ST 37) and either in one piece or - which is generally preferred - from ring segments.

Über den Umfang der Abdichtungsvorrichtung gleichmäßig verteilt sind mehrere zwischen dem Einlaufgehäuse (Wand 1) und dem gfeitbeweglichen Ring 8 wirkende, druckmittelbetätigte Zylinder (z. B. pneumatische Zylinder) 18 vorgesehen, die den gleitbeweglichen Ring 8 in Richtung auf das Einlaufende 2a des Drehrohrofens 2 drücken und die beiden Schleißflächen 15a und 16a in dichtender Berührung miteinander halten.Provided evenly distributed over the circumference of the sealing device are a plurality of pressure-medium-actuated cylinders (e.g. pneumatic cylinders) 18, which act between the inlet housing (wall 1) and the sliding ring 8 and which move the sliding ring 8 towards the inlet end 2a of the rotary kiln 2 press and hold the two wearing surfaces 15a and 16a in sealing contact with each other.

Im veranschaulichten Ausführungsbeispiel werden die Zylinder 18 von dem äußeren Ringelement 10 getragen, indem dieses äußere Ringelement 10 eine Ringscheibe 19 mit deutlich größerem Außendurchmesser als die übrigen Teile aufweist, wobei die Zylinder 18 dann so am Außenumfang dieser Ringscheibe 19 befestigt (vorzugsweise verschraubt) sind, daß sie mit den freien Enden 20a ihrer Kolbenstangen 20 sich an der äußeren Einlaufgehäusewand 1 bzw. an dort vorgesehenen Widerlagern 21 (entsprechend in Umfangsrichtung verteilt) abstützen. Die Zylinder 18 sind zumindest in ihren zum Drehrohrofen 2 hinweisenden Bereichen von einem Wärmeschutzschild 22 umgeben.In the illustrated exemplary embodiment, the cylinders 18 are carried by the outer ring element 10, in that this outer ring element 10 has an annular disk 19 with a significantly larger outer diameter than the other parts, the cylinders 18 then being fastened (preferably screwed) to the outer circumference of this annular disk 19, that they are supported with the free ends 20a of their piston rods 20 on the outer inlet housing wall 1 or on abutments 21 provided there (correspondingly distributed in the circumferential direction). The cylinders 18 are surrounded by a heat shield 22 at least in their areas facing the rotary kiln 2.

Bei dem veranschaulichten Ausführungsbeispiel bilden der Ringkanal 5 auf dem feststehenden Ring 4 und der Ringkanal 12 an der Innenseite des inneren Ringelementes 9 im Zusammenwirken miteinander gleichzeitig zwei Anschläge, die die maximale axiale Auszugsbewegung des inneren Ringelementes 9 auf dem feststehenden Ring 4 (also in bezug auf den Doppelpfeil 7 nach rechts) begrenzen. Auf der Außenumfangsseite des gegen den Drehrohrofen 2 gerichteten Endes 9a vom inneren Ringelement 9 ist dagegen eine Anschlageinrichtung 23 angebracht, die die maximale Auszugsbewegung des Ringelements 10 begrenzt, indem dieses über seinen Ringkanal 14 mit der Anschlageinrichtung 23 zusammenwirkt. Diese Anschlageinrichtung 23 kann entweder durch einen umlaufenden Ring oder durch eine Anzahl relativ kurzer Ringabschnitte gebildet sein.In the illustrated embodiment, the ring channel 5 on the fixed ring 4 and the ring channel 12 on the inside of the inner ring element 9, in cooperation with one another, simultaneously form two stops, which limit the maximum axial pull-out movement of the inner ring element 9 on the fixed ring 4 (i.e. with reference to limit the double arrow 7 to the right). On the other hand, on the outer circumferential side of the end 9a directed against the rotary kiln 2 from the inner ring element 9, a stop device 23 is attached, which limits the maximum pull-out movement of the ring element 10 by interacting with the stop device 23 via its ring channel 14. This stop device 23 can be formed either by a circumferential ring or by a number of relatively short ring sections.

In der zuvor geschilderten Weise ergibt sich durch das Zusammenwirken des inneren Ringelements 9 mit dem äußeren Ringelement 10 einerseits sowie durch das Zusammenwirken des inneren Ringelements 9 mit dem feststehenden Ring 4 andererseits eine mehrfache teleskopartige Verschiebbarkeit der genannten Teile relativ zueinander, wobei in den Zwischenbereichen der genannten Teile die ringförmigen Dichtungselemente 6, 11, 13 für eine zuverlässige Abdichtung sorgen. Es sei an dieser Stelle jedoch erwähnt, daß bei einer etwas einfacheren Ausführungsform das ringförmige Dichtungselement 6 im Ringkanal 5 des feststehenden Ringes 4 entfallen könnte, wobei dann anstelle des Ringkanales 5 lediglich eine Anschlageinrichtung etwa entsprechend der Anschlageinrichtung 23 vorgesehen werden könnte, die mit dem Ringkanal 12 zusammenwirken würde. In jedem Falle wird eine verhältnismäßig große Auszugsmöglichkeit der Abdichtungsvorrichtung erzielt, wobei stets der Spalt 3 zwischen dem feststehenden Einlaufgehäuse und dem sich drehenden Drehrohrofeneinlaufende 2a zuverlässig abgedichtet ist (durch die Schleißflächen 15a und 16a).In the manner described above, the interaction of the inner ring element 9 with the outer ring element 10, on the one hand, and the interaction of the inner ring element 9 with the fixed ring 4, on the other hand, result in multiple telescopic displaceability of the parts mentioned, with one another in the intermediate areas of the parts mentioned Parts of the annular sealing elements 6, 11, 13 ensure a reliable seal. It should be mentioned at this point, however, that in a somewhat simpler embodiment, the annular sealing element 6 in the ring channel 5 of the fixed ring 4 could be omitted, in which case instead of the ring channel 5 only one stop device approximately corresponding to the stop device 23 could be provided, which is connected to the ring channel 12 would work together. In any case, a relatively large pull-out possibility of the sealing device is achieved, the gap 3 between the fixed inlet housing and the rotating rotary kiln inlet end 2a always being reliably sealed (by the wearing surfaces 15a and 16a).

Von Bedeutung ist noch die Halterung des gleitbeweglichen Ringes 8. Zu diesem Zweck weist das äußere Ringelement 10 an seinem Außenumfang zwei Halterungsgelenke 24, 25 auf, die dieses Ringelement 10 axial gleitbeweglich, jedoch nicht-drehbeweglich über je eine Aufhängeeinrichtung 26, 27 an der ortsfesten Einlaufgehäusewand 1 haltern. Zweckmäßig sind diese Halterungsgelenke in zwei sich etwa gegenüberliegenden Umfangsbereichen auf der Ringscheibe 19 angebracht (wie in Fig. 2 dargestellt). Die Aufhängeeinrichtungen für das äußere Ringelement 10 werden im wesentlichen durch Aufhängestangen 26, 27 gebildet, die in ihrer wirksamen Traglänge - insbesondere durch Schrauben - verstellt werden können und mit Befestigungsplatten 28, 29 versehen sind, die an entsprechenden Stellen der äußeren Einlaufgehäusewand 1 angeschraubt oder in sonstiger Weise befestigt werden können.Also important is the mounting of the slidable ring 8. For this purpose, the outer ring element 10 has on its outer circumference two mounting joints 24, 25, which make this ring element 10 axially slidable, but non-rotatably via a suspension device 26, 27 on the stationary one Hold the inlet housing wall 1. These mounting joints are expediently attached to the annular disk 19 in two circumferentially approximately opposite regions (as shown in FIG. 2). The suspension devices for the outer ring element 10 are essentially formed by suspension rods 26, 27, which can be adjusted in their effective carrying length - in particular by screws - and are provided with fastening plates 28, 29, which are screwed into the outer inlet housing wall 1 at appropriate points or in can be attached in any other way.

Claims (7)

1. A device for sealing the gap between the inlet end of a rotary kiln and a stationary inlet housing, comprising a stationary ring mounted on the inlet housing, a sliding ring mounted on the stationary ring so as to be fixed against rotation but movable in axial direction and supported on the stationary ring by at least one first annular sealing element and having a first wearing surface on its end facing the rotary kiln, further comprising a rotating ring mounted on the inlet end of the rotary kiln and having a second wearing surface which comes into sealing contact with the first wearing surface, and further comprising cylinders provided between the inlet housing and the sliding ring and operated by a pressure medium, said cylinders pressing the sliding ring in the direction towards the inlet end of the rotary kiln and holding the two wearing surfaces in close sealing contact which each other, characterized in that the sliding ring (8) consists of several, preferably two, sliding ring elements (9, 10) which are arranged concentric with one another and which are movable in axial direction and telescopic relative to one another, the inner ring element (9) being supported by the first sealing element (11) on the stationary ring (4), whilst the outer ring element (10) bearing the first wearing surface (15a) is supported by a second annular sealing element (13) on the inner ring element.
2. A device according to claim 1, characterized in that a further sealing element (6) which engages with the inner ring element (9) to form a seal is provided on the outer peripheral surface of the free end (4a) of the stationary ring (4) facing the rotary kiln (2).
3. A device according to claims 1 and 2, characterized in that all the annular sealing elements (6, 11, 13) are held in annular channels (5, 12, 14) which run in the peripheral direction, and the annular channel (5) on the free end of the stationary ring (4) and the annular channel (12) on the inside of the inner ring element (9) co-operate with one another to form two stops which define the maximum axial extraction movement of the inner ring element on the stationary ring.
4. A device according to at least one of the preceding claims, characterized in that a stop device (23) which defines the maximum axial extraction movement of the outer ring element (10) is mounted on the outer peripheral surface of the end (9a) of the inner ring element (9) facing the rotary kiln (2).
5. A device according to at least one of the preceding claims, characterized in that the outer ring element (10) of the sliding ring (8) has on its outer periphery retaining joints (24, 25) which hold it on the stationary inlet housing (1) by means of suspension elements (26, 27) so that it can slide axially but cannot rotate.
6. A device according to claim 5, characterized in that the retaining joints (24, 25) are mounted on an annular disc (19) of increased external diameter on the outer ring element (10), the said annular disc bearing the cylinders (18) which are operated by a pressure medium and which are evenly distributed over the periphery, the free piston rods (20a) of the said cylinders being supported on the outer inlet housing wall (1).
7. A device according to claims 6 and 6, characterized in that two retaining joints (24, 25) are arranged in peripheral regions which lie approximately opposite to one another on the annular disc (19) of the outer ring element (10) and suspension rods (26, 27), the effective supporting length of which can be adjusted and which have mounting plates (28, 29) are provided as suspension elements for the outer ring element (1Q).
EP82101063A 1981-04-10 1982-02-12 Seal for the joint between a rotary kiln and its firing hood Expired EP0062742B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813114695 DE3114695A1 (en) 1981-04-10 1981-04-10 DEVICE FOR SEALING THE GAP BETWEEN TURNTUBES AND INLET HOUSING
DE3114695 1981-04-10

Publications (2)

Publication Number Publication Date
EP0062742A1 EP0062742A1 (en) 1982-10-20
EP0062742B1 true EP0062742B1 (en) 1984-09-19

Family

ID=6129945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101063A Expired EP0062742B1 (en) 1981-04-10 1982-02-12 Seal for the joint between a rotary kiln and its firing hood

Country Status (5)

Country Link
US (1) US4457520A (en)
EP (1) EP0062742B1 (en)
DE (2) DE3114695A1 (en)
ES (1) ES8304657A1 (en)
ZA (1) ZA821134B (en)

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CN102135180A (en) * 2011-02-17 2011-07-27 天津水泥工业设计研究院有限公司 Sealing device of charging and discharging ends of rotary cylindrical type device

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Publication number Priority date Publication date Assignee Title
CN102135180A (en) * 2011-02-17 2011-07-27 天津水泥工业设计研究院有限公司 Sealing device of charging and discharging ends of rotary cylindrical type device
CN102135180B (en) * 2011-02-17 2015-06-24 中材装备集团有限公司 Sealing device of charging and discharging ends of rotary cylindrical type device

Also Published As

Publication number Publication date
ES511228A0 (en) 1983-03-01
DE3114695A1 (en) 1982-10-28
US4457520A (en) 1984-07-03
ZA821134B (en) 1983-01-26
EP0062742A1 (en) 1982-10-20
DE3260751D1 (en) 1984-10-25
ES8304657A1 (en) 1983-03-01

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