[go: up one dir, main page]

EP0525380A1 - Grate cooler - Google Patents

Grate cooler Download PDF

Info

Publication number
EP0525380A1
EP0525380A1 EP92110536A EP92110536A EP0525380A1 EP 0525380 A1 EP0525380 A1 EP 0525380A1 EP 92110536 A EP92110536 A EP 92110536A EP 92110536 A EP92110536 A EP 92110536A EP 0525380 A1 EP0525380 A1 EP 0525380A1
Authority
EP
European Patent Office
Prior art keywords
housing
cooler
interior
drive
labyrinth seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92110536A
Other languages
German (de)
French (fr)
Other versions
EP0525380B1 (en
Inventor
Gert Dipl.-Ing. Tegtmeier
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0525380A1 publication Critical patent/EP0525380A1/en
Application granted granted Critical
Publication of EP0525380B1 publication Critical patent/EP0525380B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate

Definitions

  • the invention relates to a moving grate cooler according to the preamble of claim 1.
  • a drive device which serves to generate the thrust movement of the grate elements is usually arranged outside the cooler housing and, by means of a drive axis, extends through an elongate opening which is provided in a side wall of the cooler housing.
  • a sealing plate which is fixedly connected to the drive axle and is accordingly movable with it by spring force is pressed against a fixed sealing plate connected to the side wall of the cooler housing. If the movable sealing plate is moved back and forth by the drive axis during the thrust movement, the sealing plates, which lie against one another under spring pressure, constantly rub against one another. In order to keep the wear of the ground friction surfaces within limits, an attempt is made to constantly press grease between the friction surfaces using a central lubrication device.
  • the sealing between the drive shaft and the movable sealing plate is done in this known embodiment by a stuffing box, which is also pressed by spring force against the drive shaft and the sealing plate.
  • a stuffing box which is also pressed by spring force against the drive shaft and the sealing plate.
  • the movable sealing plate In order to keep the movable sealing plate in position on the drive axis, it is guided through a guide bar.
  • the invention is therefore based on the object, avoiding these disadvantages, to design a moving grate cooler of the type required in the preamble of claim 1 in such a way that the effort associated with the airtight and dustproof sealing of the cooler housing is substantially reduced and there is a high degree of freedom from interference in the system.
  • the drive device is enclosed by a drive housing, the interior of which is sealed airtight from the atmosphere, but has a pressure compensation connection to the interior of the cooler housing.
  • the invention establishes a pressure compensation connection between the interior of the cooler housing and the interior of the drive housing, it deliberately does not - in contrast to the known embodiment described at the outset - to provide an airtight seal for the elongated opening provided in the side wall of the cooler housing for carrying out the drive axis. Rather, according to the invention, the interior of the drive housing is sealed airtight from the atmosphere (i.e. the drive device is encapsulated), which can be done in a simple manner by means of a cover, which is preferably provided with a window through which the drive device can be observed.
  • an airtight seal is not provided according to the invention, but preferably a largely wear-free labyrinth seal that practically excludes dust from the interior of the cooler housing into the drive housing, but a pressure compensation connection between the interior of the cooler housing and of the drive housing.
  • the air pressure in the interior of the cooler housing normally always corresponds to that in the interior of the drive housing, so that there is no overflow of air from the cooler housing into the drive housing.
  • dust cannot be transported from the cooler housing to the drive housing. Only in the case of pressure fluctuations in the cooler will there be slight air flows in one direction or the other until the pressure compensation is restored. With these already small equalizing flows, however, the labyrinth seal prevents dust from being transported into the drive housing.
  • the solution according to the invention is distinguished above all by the elimination of the complex central lubrication, which not only reduces the cost of manufacture and assembly, but also makes considerable savings in operation Lubricant results.
  • the encapsulation of the drive device also results in improved protection of the hydraulic cylinders and thus an increase in the service life of piston rods and seals.
  • the sliding grate cooler illustrated in a detail contains a cooler housing 1, the interior 2 of which is located below the grate elements (not shown) and is under air pressure.
  • a drive device 3, formed by hydraulic cylinders, is arranged outside the cooler housing 1 and serves to generate the thrust movement of the grate elements.
  • This drive device 3 includes a drive shaft 4, which extends through an elongated opening 5 in the side wall 6 of the cooler housing 1.
  • the drive device 3 is enclosed by a drive housing 7, the interior 8 of which is airtight from the atmosphere by a cover 11 provided with two windows 9, 10, but has a pressure compensation connection to the interior 2 of the cooler housing 1.
  • the passage of the drive axle 4 is sealed in a dustproof (but not airtight) manner by the opening 5 provided in the side wall 6 of the cooler housing 1 by means of a labyrinth seal 12.
  • This labyrinth seal 12 thus allows a pressure compensation connection between the interior 2 of the cooler housing 1 and the interior 8 of the drive housing 7.
  • the labyrinth seal 12 contains two oval sealing elements 14 fastened to the drive axis 4 with the aid of three set screws 13, which are movable in the direction of thrust with the drive axis 4. Furthermore, the labyrinth seal 12 contains two stationary sealing elements 15 which are firmly connected to the side wall 6 of the cooler housing 1. The sealing elements 14 and 15 engage in the manner shown in the drawing with a small distance.
  • a funnel 16 is provided which has an opening 17 at its lower end through which dust falling out of the labyrinth seal 12 is returned to the interior 2 of the cooler housing 1.
  • a protective plate 19 is provided above the drive axis 4 (i.e. above the part of the labyrinth seal 12 located in the interior 2 of the cooler housing 1).
  • a labyrinth seal of the type described can also be used for sealing the openings on the swing frame cross members, the storage of which is also accommodated in an airtight housing to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Incineration Of Waste (AREA)

Abstract

The invention relates to a grate cooler, in which the drive device is surrounded by a drive housing, the inner space of which is sealed in an airtight manner in relation to the atmosphere, but on the other hand has a pressure-equalisation connection to the inner space of the cooler housing. Such a grate cooler is characterised by considerably reduced expenditure for sealing the cooler housing and a high degree of freedom from faults. <IMAGE>

Description

Die Erfindung betrifft einen Schubrostkühler entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a moving grate cooler according to the preamble of claim 1.

Da die Kühlluft bei einem Schubrostkühler durch den unterhalb der Rostelemente befindlichen Innenraum des Kühlergehäuses zugeführt wird, steht dieser Innenraum des Kühlergehäuses unter Luftüberdruck. Eine zur Erzeugung der Schubbewegung der Rostelemente dienende Antriebseinrichtung ist üblicherweise außerhalb des Kühlergehäuses angeordnet und greift mittels einer Antriebsachse durch einen länglichen Durchbruch hindurch, der in einer Seitenwand des Kühlergehäuses vorgesehen ist.Since the cooling air in a sliding grate cooler is supplied through the interior of the cooler housing located below the grate elements, this interior of the cooler housing is subject to excess air pressure. A drive device which serves to generate the thrust movement of the grate elements is usually arranged outside the cooler housing and, by means of a drive axis, extends through an elongate opening which is provided in a side wall of the cooler housing.

Um ein Entweichen der Kühlluft sowie einen Austritt von staubförmigen Teilchen des Kühlgutes durch diesen länglichen Durchbruch zu verhindern, sind bei den bisher bekannten Ausführungen besondere Maßnahmen für eine staub- und luftdichte Abdichtung dieses Durchbruches vorgesehen.In order to prevent the cooling air from escaping and dust-like particles of the refrigerated goods from escaping through this elongated opening, special measures are provided in the previously known designs for a dust and airtight seal of this opening.

Bei einer bekannten Ausführung dieser Art wird eine mit der Antriebsachse fest verbundene und demgemäß mir ihr bewegliche Dichtplatte durch Federkraft gegen eine mit der Seitenwand des Kühlergehäuses verbundene, feststehende Dichtplatte gepreßt. Wird die bewegliche Dichtplatte von der Antriebsachse bei der Schubbewegung vor-und zurückbewegt, so reiben die unter Federdruck aneinanderliegenden Dichtplatten ständig gegeneinander. Um den Verschleiß der geschliffenen Reibflächen in Grenzen zu halten, versucht man, mittels einer Zentralschmiereinrichtung ständig Fett zwischen die Reibflächen zu pressen.In a known embodiment of this type, a sealing plate which is fixedly connected to the drive axle and is accordingly movable with it by spring force is pressed against a fixed sealing plate connected to the side wall of the cooler housing. If the movable sealing plate is moved back and forth by the drive axis during the thrust movement, the sealing plates, which lie against one another under spring pressure, constantly rub against one another. In order to keep the wear of the ground friction surfaces within limits, an attempt is made to constantly press grease between the friction surfaces using a central lubrication device.

Die Abdichtung zwischen der Antriebsachse und der beweglichen Dichtplatte erfolgt bei dieser bekannten Ausführung durch eine Stopfbuchse, die gleichfalls durch Federkraft gegen die Antriebsachse und die Dichtplatte gedrückt wird. Um die bewegliche Dichtplatte in ihrer Lage auf der Antriebsachse zu halten, wird sie durch eine Führungsleiste geführt.The sealing between the drive shaft and the movable sealing plate is done in this known embodiment by a stuffing box, which is also pressed by spring force against the drive shaft and the sealing plate. In order to keep the movable sealing plate in position on the drive axis, it is guided through a guide bar.

Nachteilig ist bei dieser bekannten Ausführung vor allem der starke Verschleiß der relativ zueinander bewegten Dichtungselemente, ferner der mit der Zentralschmierung verbundene hohe Aufwand sowie die Notwendigkeit einer häufigen Wartung. Ungünstig ist insbesondere, daß Störungen an diesem Dichtungssystem (etwa ein durch verschmutztes Fett bedingter Ausfall der Zentralschmierung) einen Stillstand des Schubrostkühlers und damit unter Umständen einen zeitweisen Ausfall der ganzen Ofenanlage mit sich bringen kann.The disadvantage of this known design is above all the heavy wear of the sealing elements moved relative to one another, furthermore the high outlay associated with central lubrication and the need for frequent maintenance. It is particularly unfavorable that malfunctions in this sealing system (such as a failure of the central lubrication due to contaminated grease) can result in the thrust grate cooler coming to a standstill and thus, under certain circumstances, a temporary failure of the entire furnace system.

Der Erfindung liegt daher die Aufgabe zugrunde, unter Vermeidung dieser Nachteile einen Schubrostkühler der im Oberbegriff des Anspruches 1 vorausgesetzten Art so auszubilden, daß der mit der luft- und staubdichten Abdichtung des Kühlergehäuses verbundene Aufwand wesentlich verringert ist und sich eine hohe Störungsfreiheit der Anlage ergibt.The invention is therefore based on the object, avoiding these disadvantages, to design a moving grate cooler of the type required in the preamble of claim 1 in such a way that the effort associated with the airtight and dustproof sealing of the cooler housing is substantially reduced and there is a high degree of freedom from interference in the system.

Diese Aufgabe wird erfindungsgemäß durch das kennzeichnende Merkmal des Anspruches 1 gelöst.This object is achieved by the characterizing feature of claim 1.

Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Appropriate embodiments of the invention are the subject of the dependent claims.

Bei dem erfindungsgemäßen Schubrostkühler ist die Antriebseinrichtung von einem Antriebsgehäuse umschlossen, dessen Innenraum gegenüber Atmosphäre luftdicht abgeschlossen ist, dagegen zum Innenraum des Kühlergehäuses eine Druckausgleichsverbindung aufweist.In the moving grate cooler according to the invention, the drive device is enclosed by a drive housing, the interior of which is sealed airtight from the atmosphere, but has a pressure compensation connection to the interior of the cooler housing.

Indem die Erfindung eine Druckausgleichsverbindung zwischen dem Innenraum des Kühlergehäuses und dem Innenraum des Antriebsgehäuses herstellt, verzichtet sie - im Unterschied zur der eingangs geschilderten bekannten Ausführung - bewußt darauf, den in der Seitenwand des Kühlergehäuses vorgesehenen, zur Durchführung der Antriebsachse bestimmten länglichen Durchbruch luftdicht abzudichten. Erfindungsgemäß wird vielmehr der Innenraum des Antriebsgehäuses gegenüber Atmosphäre luftdicht abgeschlossen (d.h. die Antriebseinrichtung gekapselt), was auf einfache Weise mittels eines Deckels erfolgen kann, der vorzugsweise mit einem Fenster versehen ist, durch das die Antriebseinrichtung beobachtet werden kann.In that the invention establishes a pressure compensation connection between the interior of the cooler housing and the interior of the drive housing, it deliberately does not - in contrast to the known embodiment described at the outset - to provide an airtight seal for the elongated opening provided in the side wall of the cooler housing for carrying out the drive axis. Rather, according to the invention, the interior of the drive housing is sealed airtight from the atmosphere (i.e. the drive device is encapsulated), which can be done in a simple manner by means of a cover, which is preferably provided with a window through which the drive device can be observed.

Im Bereich des länglichen Durchbruches der Seitenwand des Kühlergehäuses wird erfindungsgemäß nicht ein luftdichter Abschluß vorgesehen, sondern vorzugsweise eine weitgehend verschleißfrei arbeitende Labyrinthdichtung, die ein Eindringen von Staub aus dem Innenraum des Kühlergehäuses in das Antriebsgehäuse praktisch ausschließt, jedoch eine Druckausgleichsverbindung zwischen den Innenräumen des Kühlergehäuses und des Antriebsgehäuses zuläßt.In the area of the elongated opening of the side wall of the cooler housing, an airtight seal is not provided according to the invention, but preferably a largely wear-free labyrinth seal that practically excludes dust from the interior of the cooler housing into the drive housing, but a pressure compensation connection between the interior of the cooler housing and of the drive housing.

Der Luftdruck im Innenraum des Kühlergehäuses entspricht normalerweise stets dem im Innenraum des Antriebsgehäuses , so daß es nicht zum Überströmen von Luft aus dem Kühlergehäuse in das Antriebsgehäuse kommt. Mangels nennenswerter Luftströmungen kann infolgedessen auch kein Staubtransport vom Kühlergehäuse zum Antriebsgehäuse erfolgen. Lediglich bei Druckschwankungen im Kühler ergeben sich geringfügige Luftströmungen in der einen oder anderen Richtung, bis der Druckausgleich wieder hergestellt ist. Bei diesen ohnehin kleinen Ausgleichsströmungen verhindert jedoch die Labyrinthdichtung einen Staubtransport in das Antriebsgehäuse.The air pressure in the interior of the cooler housing normally always corresponds to that in the interior of the drive housing, so that there is no overflow of air from the cooler housing into the drive housing. As a result of a lack of air flows worth mentioning, dust cannot be transported from the cooler housing to the drive housing. Only in the case of pressure fluctuations in the cooler will there be slight air flows in one direction or the other until the pressure compensation is restored. With these already small equalizing flows, however, the labyrinth seal prevents dust from being transported into the drive housing.

Gegenüber der eingangs geschilderten bekannten Ausführung zeichnet sich die erfindungsgemäße Lösung vor allem durch den Wegfall der aufwendigen Zentralschmierung aus, was nicht nur die Fertigung und Montage verbilligt, sondern auch im Betrieb eine beachtliche Einsparung an Schmiermittel ergibt.Compared to the known embodiment described at the outset, the solution according to the invention is distinguished above all by the elimination of the complex central lubrication, which not only reduces the cost of manufacture and assembly, but also makes considerable savings in operation Lubricant results.

Durch den Wegfall der Zentralschmierung wird ferner die Störungsfreiheit des Schubrostkühlers und damit der gesamten Ofenanlage wesentlich verbessert. Die erfindungsgemäß als reine Staubabdichtung eingesetzte Labyrinthdichtung arbeitet nahezu verschleiß- und wartungsfrei.By eliminating the central lubrication, the trouble-free operation of the moving grate cooler and thus the entire furnace system is significantly improved. The labyrinth seal used according to the invention as a pure dust seal works almost without wear and maintenance.

Die Kapselung der Antriebseinrichtung ergibt ferner einen verbesserten Schutz der Hydraulikzylinder und damit eine Steigerung der Lebensdauer von Kolbenstangen und Dichtungen.The encapsulation of the drive device also results in improved protection of the hydraulic cylinders and thus an increase in the service life of piston rods and seals.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht.An embodiment of the invention is illustrated in the drawing.

Es zeigen

  • Fig.1 einen Querschnitt durch die für das Verständnis der Erfindung wesentlichen Teile eines Schubrostkühlers,
  • Fig.2 einen Schnitt längs der Linie 11-11 der Fig.1,
  • Fig.3 eine Ansicht in Pfeilrichtung 111.
Show it
  • 1 shows a cross section through the parts of a moving grate cooler essential for understanding the invention,
  • 2 shows a section along the line 11-11 of FIG. 1,
  • 3 shows a view in the direction of arrow 111.

Der in einem Ausschnitt veranschaulichte Schubrostkühler enthält ein Kühlergehäuse 1, dessen unterhalb der (nicht dargestellten) Rostelemente befindlicher Innenraum 2 unter Luftüberdruck steht. Außerhalb des Kühlergehäuses 1 ist eine von Hydraulikzylindern gebildete Antriebseinrichtung 3 angeordnet, die zur Erzeugung der Schubbewegung der Rostelemente dient. Zu dieser Antriebseinrichtung 3 gehört eine Antriebsachse 4, die durch einen länglichen Durchbruch 5 in der Seitenwand 6 des Kühlergehäuses 1 hindurchgreift.The sliding grate cooler illustrated in a detail contains a cooler housing 1, the interior 2 of which is located below the grate elements (not shown) and is under air pressure. A drive device 3, formed by hydraulic cylinders, is arranged outside the cooler housing 1 and serves to generate the thrust movement of the grate elements. This drive device 3 includes a drive shaft 4, which extends through an elongated opening 5 in the side wall 6 of the cooler housing 1.

Die Antriebseinrichtung 3 ist von einem Antriebsgehäuse 7 umschlossen, dessen Innenraum 8 gegenüber Atmosphäre durch einen mit zwei Fenstern 9, 10 versehenen Deckel 11 luftdicht abgeschlossen ist, dagegen zum Innenraum 2 des Kühlergehäuses 1 eine Druckausgleichsverbindung aufweist.The drive device 3 is enclosed by a drive housing 7, the interior 8 of which is airtight from the atmosphere by a cover 11 provided with two windows 9, 10, but has a pressure compensation connection to the interior 2 of the cooler housing 1.

Zu diesem Zweck ist die Durchführung der Antriebsachse 4 durch den in der Seitenwand 6 des Kühlergehäuses 1 vorgesehenen Durchbruch 5 mittels einer Labyrinthdichtung 12 staubdicht (jedoch nicht luftdicht) abgedichtet. Diese Labyrinthdichtung 12 läßt somit eine Druckausgleichsverbindung zwischen dem Innenraum 2 des Kühlergehäuses 1 und dem Innenraum 8 des Antriebsgehäuses 7 zu.For this purpose, the passage of the drive axle 4 is sealed in a dustproof (but not airtight) manner by the opening 5 provided in the side wall 6 of the cooler housing 1 by means of a labyrinth seal 12. This labyrinth seal 12 thus allows a pressure compensation connection between the interior 2 of the cooler housing 1 and the interior 8 of the drive housing 7.

Die Labyrinthdichtung 12 enthält zwei an der Antriebsachse 4 mit Hilfe von drei Stellschrauben 13 befestigte ovale Dichtelemente 14, die mit der Antriebsachse 4 in Schubrichtung beweglich sind. Weiterhin enthält die Labyrinthdichtung 12 zwei stationäre Dichtelemente 15, die mit der Seitenwand 6 des Kühlergehäuses 1 fest verbunden sind. Die Dichtelemente 14 und 15 greifen in der aus der Zeichnung ersichtlichen Weise mit geringem Abstand ineinander.The labyrinth seal 12 contains two oval sealing elements 14 fastened to the drive axis 4 with the aid of three set screws 13, which are movable in the direction of thrust with the drive axis 4. Furthermore, the labyrinth seal 12 contains two stationary sealing elements 15 which are firmly connected to the side wall 6 of the cooler housing 1. The sealing elements 14 and 15 engage in the manner shown in the drawing with a small distance.

Unterhalb der Labyrinthdichtung 12 ist ein Trichter 16 vorgesehen, der an seinem unteren Ende eine Öffnung 17 aufweist, durch die aus der Labyrinthdichtung 12 ausfallender Staub in den Innenraum 2 des Kühlergehäuses 1 zurückgeführt wird.Below the labyrinth seal 12, a funnel 16 is provided which has an opening 17 at its lower end through which dust falling out of the labyrinth seal 12 is returned to the interior 2 of the cooler housing 1.

Zwischen den beiden feststehenden Dichtelementen 15 befinden sich im unteren Bereich dreieckförmige Distanzelemente 18, die einen nach unten offenen Schlitz bilden, durch den in die Labyrinthdichtung 12 geratener Staub sowie kleine Klinkerteilchen in den Trichter 16 fallen können.Between the two fixed sealing elements 15 there are triangular spacer elements 18 in the lower region which form a slot which is open at the bottom and through which dust and small clinker particles which have got into the labyrinth seal 12 can fall into the funnel 16.

Um durch den Kühlrost herabfallenden Klinker möglichst aus dem Bereich der Labyrinthdichtung 12 fernzuhalten, ist oberhalb der Antriebsachse 4 (d.h. über dem im Innenraum 2 des Kühlergehäuses 1 befindlichen Teil der Labyrinthdichtung 12) ein Schutzblech 19 vorgesehen.In order to keep clinker falling from the cooling grate as far as possible from the area of the labyrinth seal 12, a protective plate 19 is provided above the drive axis 4 (i.e. above the part of the labyrinth seal 12 located in the interior 2 of the cooler housing 1).

Abweichend von dem dargestellten und beschriebenen Ausführungsbeispiel ist es möglich, die Labyrinthdichtung 12 nur mit einem einzigen, zwischen den beweglichen Dichtelementen 14 angeordneten, feststehenden Dichtelement 15 auszubilden. Das zweite (innere) feststehende Dichtelement 15 sowie die Distanzelemente 18 kommen bei dieser Variante in Fortfall.Deviating from the illustrated and described exemplary embodiment, it is possible to design the labyrinth seal 12 only with a single, fixed sealing element 15 arranged between the movable sealing elements 14. The second (inner) fixed sealing element 15 and the spacer elements 18 are omitted in this variant.

Eine Labyrinthdichtung der beschriebenen Art kann auch für die Abdichtung der Durchbrüche an den Schwingrahmenquerträgern eingesetzt werden, deren Lagerung gleichfalls in einem nach außen luftdichten Gehäuse untergebracht ist.A labyrinth seal of the type described can also be used for sealing the openings on the swing frame cross members, the storage of which is also accommodated in an airtight housing to the outside.

Claims (6)

1. Schubrostkühler, enthaltend a) ein Kühlergehäuse (1), dessen unterhalb der Rostelemente befindlicher Innenraum (2) unter Luftüberdruck steht, b) eine außerhalb des Kühlergehäuses (1) angeordnete, zur Erzeugung der Schubbewegung der Rostelemente dienende Antriebseinrichtung (3), die mittels einer Antriebsachse (4) durch einen in einer Seitenwand (6) des Kühlergehäuses (1) vorgesehenen, länglichen Durchbruch (5) hindurchgreift,
dadurch gekennzeichnet, daß c) die Antriebseinrichtung (3) von einem Antriebsgehäuse (7) umschlossen ist, dessen Innenraum (8) gegenüber Atmosphäre luftdicht abgeschlossen ist, dagegen zum Innenraum (2) des Kühlergehäuses (1) eine Druckausgleichsverbindung aufweist. 1. Sliding grate cooler, containing a) a radiator housing (1), the interior of which is located below the grate elements (2) is under air pressure, b) a drive device (3), which is arranged outside the cooler housing (1) and serves to generate the thrust movement of the grate elements, which by means of a drive axis (4) through an elongated opening (5) provided in a side wall (6) of the cooler housing (1) reaches through,
characterized in that c) the drive device (3) is enclosed by a drive housing (7), the interior (8) of which is hermetically sealed from the atmosphere, but has a pressure compensation connection to the interior (2) of the cooler housing (1). 2. Schubrostkühler nach Anspruch 1, dadurch gekennzeichnet, daß die Durchführung der Antriebsachse (4) durch den in der Seitenwand (6) des Kühlergehäuses (1) vorgesehenen Durchbruch (5) mittels einer Labyrinthdichtung (12) abgedichtet ist, die eine Druckausgleichsverbindung zwischen dem Innenraum (2) des Kühlergehäuses (1) und dem Innenraum (8) des Antriebsgehäuses (7) bildet.2. moving grate cooler according to claim 1, characterized in that the implementation of the drive shaft (4) through the in the side wall (6) of the cooler housing (1) provided Breakthrough (5) is sealed by means of a labyrinth seal (12), which forms a pressure compensation connection between the interior (2) of the cooler housing (1) and the interior (8) of the drive housing (7). 3. Schubrostkühler nach Anspruch 2, dadurch gekennzeichnet, daß die Labyrinthdichtung (12) wenigstens zwei an der Antriebsachse (4) befestigte und mit ihr in Schubrichtung bewegliche ovale Dichtelemente (14) und wenigstens ein mit der Seitenwand (6) des Kühlergehäuses (1) fest verbundenes, stationäres Dichtelement (15) enthält.3. moving grate cooler according to claim 2, characterized in that the labyrinth seal (12) at least two on the drive shaft (4) and with it movable in the pushing direction oval sealing elements (14) and at least one with the side wall (6) of the cooler housing (1) contains fixed, stationary sealing element (15). 4. Schubrostkühler nach Anspruch 2, dadurch gekennzeichnet, daß unterhalb der Labyrinthdichtung (12) ein Trichter (16) vorgesehen ist, über den aus der Labyrinthdichtung ausfallender Staub in den Innenraum (2) des Kühlergehäuses (1) rückführbar ist.4. moving grate cooler according to claim 2, characterized in that below the labyrinth seal (12) a funnel (16) is provided, via which dust falling out of the labyrinth seal in the interior (2) of the cooler housing (1) is recyclable. 5. Schubrostkühler nach Anspruch 2, dadurch gekennzeichnet, daß oberhalb des im Innenraum (2) des Kühlergehäuses (1) befindlichen Teiles der Labyrinthdichtung (12) ein Schutzblech (19) vorgesehen ist.5. Sliding grate cooler according to claim 2, characterized in that a protective plate (19) is provided above the part of the labyrinth seal (12) located in the interior (2) of the cooler housing (1). 6. Schubrostkühler nach Anspruch 1, dadurch gekennzeichnet, daß das Antriebsgehäuse (7) durch einen vorzugsweise mit wenigstens einem Fenster (9, 10) versehenen Deckel (11) luftdicht gegenüber Atmosphäre abgeschlossen ist.6. moving grate cooler according to claim 1, characterized in that the drive housing (7) by an preferably with at least one window (9, 10) provided cover (11) is airtight against the atmosphere.
EP92110536A 1991-07-09 1992-06-23 Grate cooler Expired - Lifetime EP0525380B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9108470U DE9108470U1 (en) 1991-07-09 1991-07-09 Grate cooler
DE9108470U 1991-07-09

Publications (2)

Publication Number Publication Date
EP0525380A1 true EP0525380A1 (en) 1993-02-03
EP0525380B1 EP0525380B1 (en) 1995-08-30

Family

ID=6869126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110536A Expired - Lifetime EP0525380B1 (en) 1991-07-09 1992-06-23 Grate cooler

Country Status (5)

Country Link
US (1) US5330350A (en)
EP (1) EP0525380B1 (en)
DE (2) DE9108470U1 (en)
DK (1) DK0525380T3 (en)
ES (1) ES2076620T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421552A1 (en) * 1994-01-24 1995-07-27 Krupp Polysius Ag Chill grate cooler
US5882189A (en) * 1994-10-31 1999-03-16 Babcock Materials Handling Division Gmbh Sliding grate for a burnt-material-cooling unit, and grating plate therefor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412885A1 (en) * 1994-04-14 1995-10-19 Krupp Polysius Ag Cooling grate
ZA969708B (en) * 1995-12-15 1997-06-20 Krupp Polysius Ag Prevention of snowmen and removal of lumps in clinker coolers
CN102853084B (en) * 2012-09-26 2015-06-17 兴化市东方机械有限责任公司 Transmission shaft sealing device of grate coolers
CN114396804B (en) * 2021-12-13 2023-05-23 徐州中材装备重型机械有限公司 Internal observation device of grate cooler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE450676C (en) * 1926-01-19 1927-10-13 Vesuvio Feuerungsbau G M B H Step grate with moving steps
FR1164458A (en) * 1956-01-20 1958-10-09 Smidth & Co As F L Method and apparatus for the simultaneous transport and heating (or cooling) of bulk materials
US4290610A (en) * 1978-01-04 1981-09-22 Lizogub Vadim A Labyrinth seal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358385A (en) * 1965-04-12 1967-12-19 Fuller Co Reciprocating grate conveyor with side wall damage preventing means
DE3631974A1 (en) * 1986-09-19 1988-03-31 Krupp Polysius Ag DEVICE FOR DRIVING A PISTON GRILL
DE4004393A1 (en) * 1990-02-13 1991-08-14 Krupp Polysius Ag Cooling of hot layer in rotary-drum furnace - involves selective operation of magnetic valves directing forced air jets at grates which require additional cooling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE450676C (en) * 1926-01-19 1927-10-13 Vesuvio Feuerungsbau G M B H Step grate with moving steps
FR1164458A (en) * 1956-01-20 1958-10-09 Smidth & Co As F L Method and apparatus for the simultaneous transport and heating (or cooling) of bulk materials
US4290610A (en) * 1978-01-04 1981-09-22 Lizogub Vadim A Labyrinth seal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421552A1 (en) * 1994-01-24 1995-07-27 Krupp Polysius Ag Chill grate cooler
US5882189A (en) * 1994-10-31 1999-03-16 Babcock Materials Handling Division Gmbh Sliding grate for a burnt-material-cooling unit, and grating plate therefor

Also Published As

Publication number Publication date
US5330350A (en) 1994-07-19
EP0525380B1 (en) 1995-08-30
DE59203444D1 (en) 1995-10-05
ES2076620T3 (en) 1995-11-01
DE9108470U1 (en) 1991-08-29
DK0525380T3 (en) 1995-12-27

Similar Documents

Publication Publication Date Title
DE112014002700B4 (en) actuator
DE4015699C2 (en)
DE2806117C2 (en) Electrically operated window drive, especially for motor vehicles
DE4311641C1 (en) Linear motion guide for machinery - has spring belt cover over whole guide top surface locating in recesses in guide sides
DE102012010466B4 (en) slide valve
DE10341095B4 (en) Disc brake, in particular for a commercial vehicle
EP4144945A1 (en) Sliding door system, sliding door and buffer device
DE2952408C2 (en)
DE69203902T2 (en) Suit noise minimization device.
EP0856631A2 (en) Sliding door device, in particular for a clean room
EP0525380B1 (en) Grate cooler
EP0056222A1 (en) Butterfly valve
EP1540210A1 (en) Dual-action sealing system
DE19943243A1 (en) Sun shield for double-glazed vehicle window, with second coupling element able to move in the movement direction of roller blind
DE2931184A1 (en) Rack and pinion steering
DE102011002704A1 (en) sliding door system
DE4441784A1 (en) Safety work bench
DE3311992A1 (en) Actuating device for motor-vehicle door locks
DE2208775C3 (en) Discharge device for sponge iron
EP0258475B1 (en) Vacuum sliding valve
DE102016006736B4 (en) Linear drive with a spindle nut and spindle rotatably mounted in a bearing plate
DE102017128708B4 (en) Frame with a door rotatably mounted on it and a sealing arrangement for the door mounted on the frame
DE102016006735B4 (en) Linear drive with a spindle nut and spindle rotatably mounted in a bearing plate
DE2820345C2 (en) Coupling valve for the vacuum-tight connection of a stationary and a movable chamber that can be evacuated
DE404201C (en) Dust and gas-tight shaft bearings

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE DK ES FR GB IT

17P Request for examination filed

Effective date: 19930329

17Q First examination report despatched

Effective date: 19941214

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE DK ES FR GB IT

REF Corresponds to:

Ref document number: 59203444

Country of ref document: DE

Date of ref document: 19951005

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950915

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2076620

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010511

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010518

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20010607

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010621

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20010628

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010705

Year of fee payment: 10

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020623

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020731

BERE Be: lapsed

Owner name: *KRUPP POLYSIUS A.G.

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020623

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050623