EP0369399B1 - Wind sifter - Google Patents
Wind sifter Download PDFInfo
- Publication number
- EP0369399B1 EP0369399B1 EP89121065A EP89121065A EP0369399B1 EP 0369399 B1 EP0369399 B1 EP 0369399B1 EP 89121065 A EP89121065 A EP 89121065A EP 89121065 A EP89121065 A EP 89121065A EP 0369399 B1 EP0369399 B1 EP 0369399B1
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- European Patent Office
- Prior art keywords
- cover
- cover disc
- disc
- wheel
- air
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Definitions
- the invention relates to an air classifier, in which the classifying device consists of a rotating classifying wheel which flows against the centrifugal force and which is provided with blades on the outer circumference. Sight air and fine material leave the classifying wheel through an outlet nozzle, the coarse material is rejected by the rotating blade ring and gets out of the classifying room via a suitable discharge device.
- Proven air classifiers of this type are described, for example, in DE-C 17 57 582 or DE-C 33 03 078. Such a vane wheel describes, for example, DE-C 35 08 889.
- classifiers are sometimes equipped with an outlet nozzle extended to the dip tube for the fine material and the classifying air.
- the outlet nozzle projects as a fixed installation part into the classifying wheel by a certain amount (see DE-C 33 03 078, Fig. 1, item 12).
- a wind sifter with a classifier wheel consisting of two cover plates and a blade ring held between the cover plates is also known from FR-A-156 57 29, and in this classifier a coaxial outlet pipe is connected in a rotationally fixed manner to the downstream cover plate of the classifier wheel.
- the outlet pipe is brought to the outflow-side cover plate with a constant inner diameter and continues in an opening in the outlet-side cover plate, the length of which corresponds exactly to the thickness of the cover plate and the cross-section of which is enclosed by the vane ring and delimited by the cover plates from the actual outlet pipe tapered like a truncated cone.
- the object of the invention is therefore to design the classifying wheel in such a way that losses due to relative movements between moving parts and stationary components are significantly reduced.
- the object of the invention is to enable a compact classifier design.
- the pressure loss of the wind classifier designed according to the invention is significantly reduced compared to a wind classifier with a fixed outlet connection.
- the classifier wheel has an upper, first, downstream cover plate 1 and an axially offset lower, second cover plate 2. Between the two cover plates 1, 2 there are blades 3 at regular intervals in the circumferential direction.
- Such classifier wheels are known per se, so that further Comments on the formation of the blades 3 do not have to be made. In an embodiment closer to the previous versions, they are firmly arranged on the outer circumference of the upper and lower cover disks 1, 2 by holding the two cover disks together by bolts and holding the blades between them. Cover disks and blades form the classifying wheel rotating about its longitudinal axis 4.
- the outlet nozzle 5 is firmly connected to the upper cover plate 1. It is as a dip tube with section 6 inside of the classifying wheel 1 to 3, in order to be connected within the classifying wheel to the upper cover plate 1 in a rotationally fixed manner. In an upper section 7, the outlet nozzle above the upper cover plate 1 is widened in a funnel shape; Arrows and outflows of the visual air enriched with fine dust are indicated by arrows 8.9. The rotary movement is initiated in the classifying wheel via the lower cover plate 2. In the area of the flow 8.9, the relative speed between the flow and the outlet connection 5 is greatly reduced compared to conventional solutions.
- the classifying wheel and its upper cover disk 1, assigned to the outlet connection 5 in a rotationally fixed manner, are arranged in the air classifier according to the invention according to FIG. 2 in a housing which consists of a pot-shaped lower part 10 and an upper cover 11.
- the two housing parts 10, 11 lie one on top of the other in peripheral flanges 12, 13 and are detachably connected to one another by screw connections 14 inserted through these peripheral flanges.
- the lower housing part 10 has a lateral bracket 15, in which the cover 11 is pivotally mounted about its longitudinal axis by means of a pin 16. To pivot the cover 11 about the longitudinal axis of the pin 16, the screw connections 14 inserted through the flanges 12, 13 are loosened.
- the cover 11 is provided with a neck-shaped extension 17, in which an upper, cylindrical tubular outlet tube 18 is rotatably mounted about its longitudinal axis in two axially offset bearings 19, 20; the outlet pipe 5 continues in the outlet pipe 18.
- the outlet pipe 18 is connected to a vacuum source, not shown. Also at the upper end, the drive torque is introduced into the outlet pipe 18, for which purpose, as an example, outside of the upper end of the neck-shaped extension 17, which is releasably closed by a cover, a non-rotatable one pulley 21 connected to the drive connector and a drive belt 22 acting thereon are shown.
- the second, lower cover plate 2 is fastened by means of a pin 23 to a bearing pin 24 which is mounted in bearings 25, 26 in a likewise neck-shaped extension 27 of the lower housing part 10 so as to be rotatable about its longitudinal axis.
- this second, lower cover disk 2 can be designed as a horizontally arranged beater disk by arranging, on its outer periphery outside the blades 3, suitably designed beating tools 28, opposite which a grinding track 29 is arranged in the lower housing part 10.
- the lower cover disk 2 is driven separately, which is why the drive torque is introduced into the bearing bolt 24 outside the shoulder 27, for which purpose, again as an example, a pulley 30 is non-rotatably placed on the outer end of the bearing bolt 24 outside the shoulder end closed by a releasable cover, on which a drive belt 31 acts.
- the belt drives 21, 22 on the one hand and 30, 31 on the other hand are matched to one another such that the upper and lower cover disks 2, 3 are driven uniformly, but above all in a desired different speed ratio, and desired speed differences can occur and corresponding relative movements between the lower ends of the Buckets 3 and the lower cover plate 2 occur. Therefore, in this classifying wheel there is a fixed connection between the upper cover plate 1 and blades 3, but no contact is provided between blades 3 and lower cover plate 2.
- a guide tube 32 is arranged and held with support blades 33 in the lower housing part 10 in such a way that it surrounds the blade rim 3 concentrically.
- an inlet connection 34 opens radially into the lower housing part 10 directly above the housing base for introducing the classifying air.
- an inlet connection 35 for the material opens radially into the lower housing part 10 and is conveyed into the housing by means of an inlet screw 36 arranged in the inlet connection 35.
- the classifying air enters through the connecting piece 34, the material through the connecting piece 35 into the lower housing part 10, whereupon the classifying air enriched with good through the annular channel 37 between the guide tube 32 and the wall of the lower part 10 through a manifold 38 is supplied in the housing cover 11, in which a flow reversal takes place.
- the well-enriched classifying air now reaches the area inside the guide tube 32 in order to be sucked in from there in the radial direction into the classifying wheel, where the coarse-grained material is separated off on the blades 3, so that classifying material laden with fine material enters the classifying wheel.
- This fine air laden sight air is deflected in the sight wheel in an axial flow direction and is now sucked out through the outlet nozzle 5 and the outlet pipe 18.
- the fine material is also filtered out of the air in a filter downstream of the dip tube section 18.
- the material which is too coarse reaches the area of the impact tools 28 and the grinding track 29 along the cover disc 2 which is designed as an impact disc, in order to break up there into material of smaller grain size to be and to be fed to the classifier wheel again with the classifier air and fresh material in the manner described.
- the interior of the housing 10, 11 is easily accessible and cleaning and maintenance, in particular of the classifying wheel part with the upper cover disc 1 and the blades 3 removed from the lower cover disc 2 and, if appropriate, its repair are readily possible.
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- Combined Means For Separation Of Solids (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Windsichter, bei dem die Sichtvorrichtung aus einem entgegen der wirkenden Fliehkraft durchströmenten rotierenden Sichtrad besteht, welches mit Schaufeln am äußeren Umfang versehen ist. Sichtluft und Feingut verlassen das Sichtrad durch einen Auslaßstutzen, das Grobgut wird von dem rotierenden Schaufelkranz abgewiesen und gelangt über eine geeignete Austragsvorrichtung aus dem Sichtraum.The invention relates to an air classifier, in which the classifying device consists of a rotating classifying wheel which flows against the centrifugal force and which is provided with blades on the outer circumference. Sight air and fine material leave the classifying wheel through an outlet nozzle, the coarse material is rejected by the rotating blade ring and gets out of the classifying room via a suitable discharge device.
Bewährte Windsichter dieser Art sind zum Beispiel in der DE-C 17 57 582 oder der DE-C 33 03 078 beschrieben. Ein derartiges Schaufelsichtrad beschreibt zum Beispiel die DE-C 35 08 889.Proven air classifiers of this type are described, for example, in DE-C 17 57 582 or DE-C 33 03 078. Such a vane wheel describes, for example, DE-C 35 08 889.
Zum Erzielen einer höheren Feinheit sowie einer verbesserten Spritzkornfreiheit werden solche Sichter bisweilen mit zum Tauchrohr verlängertem Auslaßstutzen für das Feingut und die Sichtluft ausgerüstet. Dabei ragt der Auslaßstutzen als festes Einbauteil um einen gewissen Betrag in das Sichtrad hinein (siehe DE-C 33 03 078, Fig. 1, Pos. 12).In order to achieve a higher fineness and an improved freedom from spray particles, such classifiers are sometimes equipped with an outlet nozzle extended to the dip tube for the fine material and the classifying air. The outlet nozzle projects as a fixed installation part into the classifying wheel by a certain amount (see DE-C 33 03 078, Fig. 1, item 12).
Feststehende Einbauten im Inneren von Schaufelsichträdern haben jedoch den Nachteil, daß sich die rotierende Strömung an diesen stark abbremst; dadurch wird zumindest ein Teil des erzielbaren Fortschrittes wieder zunichte gemacht. Weiterhin ist der Verschleiß an derartigen feststehenden Einbauten gerade bei feinsten Trennungen sehr hoch, da die Relativgeschwindigkeit zwischen Auslaßstutzen als bei den bekannten Windsichtern besonders markantem feststehendem Einbauteil und den von der rotierenden Gasströmung mitgeschleppten Teilchen sehr groß ist.Fixed internals in the interior of bucket vision wheels have the disadvantage, however, that the rotating flow slows them down considerably; this will destroy at least part of the achievable progress. Farther the wear on such fixed internals is very high, especially with the finest separations, since the relative speed between the outlet connection as a particularly distinctive fixed installation part in the known air classifiers and the particles entrained by the rotating gas flow is very high.
Ein Windsichter mit einem Sichterrad aus zwei Deckscheiben und einem zwischen den Deckscheiben gehaltenen Schaufelkranz ist auch aus der FR-A-156 57 29 bekannt, und bei diesem Windsichter ist ein koaxiales Auslaßrohr drehfest mit der abströmseitigen Deckscheibe des Sichterrades verbunden. Das Auslaßrohr ist mit konstantem Innendurchmesser an die abströmseitige Deckscheibe herangeführt und setzt sich in einer Öffnung in der auslaßseitigen Deckscheibe fort, deren Länge exakt der Dicke der Deckscheibe entspricht und deren Querschnitt sich von der vom Schaufelkranz umschlossenen, von den Deckscheiben begrenzten Sichtkammer aus zum eigentlichen Auslaßrohr hin nach der Art eines Kegelstumpfes verjüngt.A wind sifter with a classifier wheel consisting of two cover plates and a blade ring held between the cover plates is also known from FR-A-156 57 29, and in this classifier a coaxial outlet pipe is connected in a rotationally fixed manner to the downstream cover plate of the classifier wheel. The outlet pipe is brought to the outflow-side cover plate with a constant inner diameter and continues in an opening in the outlet-side cover plate, the length of which corresponds exactly to the thickness of the cover plate and the cross-section of which is enclosed by the vane ring and delimited by the cover plates from the actual outlet pipe tapered like a truncated cone.
Aufgabe der Erfindung ist es demzufolge, das Sichtrad so auszubilden, daß Verluste infolge Relativbewegungen zwischen bewegten Teilen und feststehenden Bauteilen deutlich verringert werden. In weiterer Ausgestaltung liegt der Erfindung die Aufgabe zugrunde, eine kompakte Sichterbauweise zu ermöglichen.The object of the invention is therefore to design the classifying wheel in such a way that losses due to relative movements between moving parts and stationary components are significantly reduced. In a further embodiment, the object of the invention is to enable a compact classifier design.
Durch die erfindungsgemäße Ausbildung des Windsichters gemäß den Patentansprüchen werden die geschilderten Nachteile, die bei Verwendung eines feststehenden Tauchrohres auftreten, weitestgehend vermieden. Die Reibungsverluste werden verringert und eine kompakte Bauweise ist möglich. So ist wegen der reduzierten Abbremsung der Strömung um das mitrotierende Tauchrohr im allgemeinen eine etwas geringere Sichterdrehzahl erforderlich, um die gleiche Feinheit zu erzielen. Dies führt, unterstützt durch die kleinere auftretende Relativgeschwindigkeit zwischen mitrotierendem Tauchrohr und von der Strömung mitgeschleppten Teilchen, zu einer erheblichen Reduzierung des Verschleißes, während gleichzeitig durch den in die Sichtkammer hineinragenden Teil des Stutzens eine bessere Klassierung erreicht wird, der Verschleiß also auch bei feinster Trennung gering ist und die in der Drallströmung auftretende Umfangsgeschwindigkeit wird bereits in dem als "Tauchrohr" dienenden Stutzen (gemäß vur = const.) abgebaut.The inventive design of the air classifier according to the patent claims largely avoids the disadvantages described which occur when using a fixed dip tube. The friction losses are reduced and a compact design is possible. Because of the reduced deceleration of the flow around the rotating immersion tube, there is generally a somewhat lower classifier speed required to achieve the same fineness. Supported by the lower relative speed between the rotating immersion tube and the particles carried by the flow, this leads to a considerable reduction in wear, while at the same time a better classification is achieved by the part of the nozzle protruding into the viewing chamber, i.e. wear even with the finest separation is low and the circumferential speed occurring in the swirl flow is already reduced in the nozzle serving as an "immersion tube" (according to v u r = const.).
Durch die optimierte Strömungsführung im diffusorartig ausgebildeten Tauchrohr sowie wegen der im allgemeinem bei gleicher Feinheit reduzierten Sichterdrehzahl wird zudem der Druckverlust des erfindungsgemäß ausgestalteten Windsichters gegenüber einem Windsichter mit feststehendem Austrittsstutzen deutlich verringert.Because of the optimized flow in the diffuser-like dip tube and because of the same in general In addition to the finely reduced classifier speed, the pressure loss of the wind classifier designed according to the invention is significantly reduced compared to a wind classifier with a fixed outlet connection.
Die Erfindung, insbesondere soweit es auch um die kompakte Sichterbauweise geht, ist nachfolgend anhand der Zeichnung näher erläutert; in der Zeichnung zeigen
- Fig. 1
- ein erfindungsgemäß ausgestaltetes und zur Anwendung kommendes Sichtrad als vertikaler Querschnitt und
- Fig. 2
- ebenfalls als vertikaler Querschnitt einen erfindungsgemäßen Windsichter mit einem erfindungsgemäßen Sichtrad in einer gegenüber Fig. 1 geänderten Ausführung, der sich insbesondere auch durch eine kompakte Bauweise auszeichnet.
- Fig. 1
- an inventive sight wheel designed as a vertical cross section and
- Fig. 2
- likewise as a vertical cross section, an air classifier according to the invention with a classifying wheel according to the invention in a design modified from FIG. 1, which is also characterized in particular by a compact design.
Das Sichtrad weist eine obere, erste, abströmseitige Deckscheibe 1 auf und eine dazu axial versetzte untere, zweite Deckscheibe 2. Zwischen den beiden Deckscheiben 1,2 befinden sich in gleichmäßigen Abständen in Umrangsrichtung Schaufeln 3. Derartige Sichträder sind an sich bekannt, so daß weitere Ausführungen zur Ausbildung der Schaufeln 3 nicht gemacht werden müssen. Sie sind bei einer den bisherigen Ausführungen näheren Ausführungsform am Außenumfang der oberen und unteren Deckscheibe 1,2 fest zwischen diesen angeordnet, indem die beiden Deckscheiben durch Bolzen zusammengehalten sind und zwischen sich die Schaufeln halten. Deckscheiben und Schaufeln bilden das um seine Längsachse 4 drehende Sichtrad.The classifier wheel has an upper, first,
Mit der oberen Deckscheibe 1 ist der Austrittsstutzen 5 fest verbunden. Er ist als Tauchrohr mit dem Abschnitt 6 in das Innere des Sichtrades 1 bis 3 hineingeführt, um innerhalb des Sichtrades mit der oberen Deckscheibe 1 drehfest verbunden zu sein. In einem oberen Abschnitt 7 ist der Austrittsstutzen oberhalb der oberen Deckscheibe 1 innen trichterförmig erweitert; An-und Abströmung der mit Feinstaub angereicherten Sichtluft sind durch Pfeile 8,9 gekennzeichnet. Die Drehbewegung wird in das Sichtrad über die untere Deckscheibe 2 eingeleitet. Im Bereich der Strömung 8,9 ist die Relativgeschwindigkeit zwischen Strömung und Austrittsstutzen 5 gegenüber konventionellen Lösungen stark herabgesetzt.The
Sichtrad und dessen oberer Deckscheibe 1 drehfest zugeordneter Austrittsstutzen 5 sind bei dem erfindungsgemäßen Windsichter gemäß Fig. 2 in einem Gehäuse angeordnet, das aus einem topfförmigen Unterteil 10 und einem oberen Deckel 11 besteht. Die beiden Gehäuseteile 10,11 liegen in Umfangsflanschen 12,13 aufeinander und sind durch durch diese Umfangsflansche hindurchgesteckte Schraubverbindungen 14 lösbar miteinander verbunden. Das Gehäuseunterteil 10 weist eine seitliche Konsole 15 auf, in der der Deckel 11 mittels eines Zapfens 16 um dessen Längsachse schwenkbar gelagert ist. Zum Schwenken des Deckels 11 um die Längsachse des Zapfens 16 werden die durch die Flansche 12,13 gesteckten Schraubverbindungen 14 gelöst. Der Deckel 11 ist mit einem halsförmigen Ansatz 17 versehen, in dem ein oberes, zylinderrohrförmiges Austrittsrohr 18 in zwei axial gegeneinander versetzten Lagern 19,20 um seine Längsachse drehbar gelagert ist; in dem Austrittsrohr 18 setzt sich der Austrittsstutzen 5 fort.The classifying wheel and its
Am oberen Ende ist das Austrittsrohr 18 an eine nicht gezeichnete Unterdruckquelle angeschlossen. Ebenfalls am oberen Ende wird das Antriebsdrehmoment in das Austrittsrohr 18 eingeleitet, wozu als Beispiel außerhalb des oberen, durch einen Deckel lösbar verschlossenen Endes des halsförmigen Ansatzes 17 eine drehfest mit dem Antriebsstutzen verbundene Riemenscheibe 21 und ein auf diese einwirkender Antriebsriemen 22 dargestellt sind.At the upper end, the
Die zweite, untere Deckscheibe 2 ist mittels eines Zapfens 23 an einen Lagerbolzen 24 befestigt, der in Lagern 25,26 in einem ebenfalls halsförmigen Ansatz 27 des Gehäuseunterteils 10 um seine Längsachse drehbar gelagert ist. Erfindungsgemäß kann diese zweite, untere Deckscheibe 2 als horizontal angeordnete Schlagscheibe ausgebildet sein, indem an ihrem äußeren Umfang außerhalb der Schaufeln 3 in geeigneter Weise ausgebildete Schlagwerkzeuge 28 angeordnet sind, denen gegenüber im Gehäuseunterteil 10 eine Mahlbahn 29 angeordnet ist. Die untere Deckscheibe 2 wird separat angetrieben, weshalb in den Lagerbolzen 24 außerhalb des Ansatzes 27 das Antriebsdrehmoment eingeleitet wird, wozu, wiederum als Beispiel, auf das äußere Ende des Lagerbolzens 24 außerhalb des durch einen lösbaren Deckel verschlossenen Ansatzendes eine Riemenscheibe 30 drehfest aufgesetzt ist, auf die ein Antriebsriemen 31 einwirkt.The second,
Die Riementriebe 21,22 einerseits und 30,31 andererseits sind so aufeinander abgestimmt, daß obere und untere Deckscheibe 2,3 gleichmäßig, vor allem aber in einem gewollten anderen Drehzahlverhältnis, angetrieben werden und gewollte Drehzahlunterschiede auftreten können und entsprechend Relativbewegungen zwischen den unteren Enden der Schaufeln 3 und der unteren Deckscheibe 2 auftreten. Deshalb ist bei diesem Sichtrad eine feste Verbindung zwischen oberer Deckscheibe 1 und Schaufeln 3, keine Berührung jedoch zwischen Schaufeln 3 und unterer Deckscheibe 2 vorgesehen.The belt drives 21, 22 on the one hand and 30, 31 on the other hand are matched to one another such that the upper and
Zwischen dem Kranz der Schaufeln 3 und dem Kranz der Schlagwerkzeuge 28, oberhalb der Schlagwerkzeuge 28 ist ein Führungsrohr 32 angeordnet und mit Stützschaufeln 33 im Gehäuseunterteil 10 derart gehalten, daß es den Schaufelkranz 3 konzentrisch umgibt.Between the rim of the
Unterhalb der unteren, als Schlagscheibe ausgebildeten Deckscheibe 2 mündet unmittelbar über dem Gehäuseboden radial in das Gehäuseunterteil 10 ein Einlaßstutzen 34 zur Einbringung der Sichtluft. Im Bereich des Führungsrohres 32 und zwischen oberer und unterer Deckscheibe 1,2 mündet radial in das Gehäuseunterteil 10 ein Einlaßstutzen 35 für das Gut, das mittels einer im Einlaßstutzen 35 angeordneten Einlaßschnecke 36 in das Gehäuse gefördert wird.Below the
Bei laufendem Sichtrad 1 bis 3 tritt die Sichtluft durch den Stutzen 34, das Gut durch den Stutzen 35 in das Gehäuseunterteil 10 ein, worauf die mit Gut angereicherte Sichtluft durch den Ringkanal 37 zwischen dem Führungsrohr 32 und der Wand des Gehäuseunterteils 10 hindurch einem Krümmer 38 im Gehäusedeckel 11 zugeführt wird, in dem eine Strömungsumkehr erfolgt. Die gutangereicherte Sichtluft gelangt nun in den Bereich innerhalb des Führungsrohres 32, um von dort aus in radialer Richtung in das Sichtrad eingesaugt zu werden, wo an den Schaufeln 3 eine Abtrennung von zu grobkörnigem Gut erfolgt, so daß in das Sichtrad feingutbeladene Sichtluft gelangt. Diese feingutbeladene Sichtluft wird im Sichtrad in eine axiale Strömungsrichtung umgelenkt und wird nunmehr durch den Austrittsstutzen 5 und das Austrittsrohr 18 abgesaugt. In einem dem Tauchrohrabschnitt 18 nachgeschalteten Filter wird auch noch das Feingut aus der Luft ausgefiltert. Das zu grobe Gut gelangt entlang der zur Schlagscheibe ausgebildeten Deckscheibe 2 in den Bereich der Schlagwerkzeuge 28 und der Mahlbahn 29, um dort zu Gut kleinerer Körnung zerschlagen zu werden und erneut mit der Sichtluft und Frischgut in beschriebener Art und Weise dem Sichtrad zugeführt zu werden.With the classifying
Erfindungsgemäß ist nach dem Aufklappen des Gehäusedeckels 11 das Innere des Gehäuses 10,11 gut zugänglich und eine Reinigung und Wartung insbesondere des von der unteren Deckscheibe 2 entfernten Sichtradteiles mit der oberen Deckscheibe 1 und den Schaufeln 3 und gegebenenfalls dessen Reparatur sind gut möglich.According to the invention, after the housing cover 11 has been opened, the interior of the
Claims (8)
- An air separator comprising a rotating separator wheel to which the flow of separator air charged with fine material is admitted radially from the exterior inwards against centrifugal force, and from which the separator air flows off axially through an exit tube (18), and comprising a cover disc (1) on the outflow side, to which the exit tube (18) is connected, a second cover disc (2) axially offset therefrom, and peripherally disposed blades (3) therebetween, characterised in that the exit tube (18) has on the separator wheel side a port (5) by means of which the exit tube (18) is connected for rotation to the separator wheel cover disc (1) on the outflow side and which terminates, by a portion (6), in the area between the two cover plates (1, 2) of the separator wheel, and has a portion (7) in which the internal cross-section of the port (5) continuously widens towards the inner cross-section of the exit tube (18).
- An air separator according to claim 1, characterised in that the second cover disc (2) is mounted rotatably in the housing (10, 11) in the region of a cylindrical journal (24) and the drive (30, 31) is transmitted to the separator wheel (1 - 3) by way of this second cover disc.
- An air separator according to claim 1 or 2, characterised in that the second cover disc (2) is equipped with impact tools (28).
- An air separator according to claim 3, characterised in that each of the two cover discs (1, 2) has its own drive (21, 22; 30, 31) and the two cover discs are drivable at different speeds, the cover disc (1) on the outflow side being driven by way of the exit port (5, 6, 18), which is constructed as a hollow shaft, while the second cover disc (2) is driven by way of a journal (24).
- An air separator according to claim 3 or 4, characterised in that the blades (3) are secured to the cover disc (1) on the outflow side and terminate before the second cover disc (2) without contact.
- An air separator according to claim 5, characterised in that the separator wheel (1 - 3) is disposed in a two-part housing (10, 11), in such manner that the cover disc (1) on the outflow side is mounted with the blades (3) and the exit port (5, 6, 18) in a removable housing cover (11), while the second cover disc (2) constructed as an impact disc with impact tools (28) is mounted rotatably in the cup-shaped housing part (10) constructed to receive the separator wheel in its operative position.
- An air separator according to claim 6, characterised in that the cover (11) is connected to the cup-shaped housing part (10) so as to be pivotable in a bearing (16) on the housing and cover edge.
- An air separator according to any one of claims 4 to 7, characterised in that the cover disc (1) on the outflow side is mounted rotatably by means of the exit port (5, 6, 18), which is constructed as a hollow shaft, and the second cover disc (2) constructed as an impact disc with impact tools (28) is mounted rotatably by means of a pin (24), a neck-shaped housing attachment (17, 27 respectively) being provided for the mounting in each case, the associated drive (21, 22; 30, 31) acting on the hollow shaft and on the pin outside the neck-shaped housing attachment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3838871 | 1988-11-17 | ||
| DE3838871A DE3838871C2 (en) | 1988-01-22 | 1988-11-17 | Air classifier |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0369399A2 EP0369399A2 (en) | 1990-05-23 |
| EP0369399A3 EP0369399A3 (en) | 1991-06-12 |
| EP0369399B1 true EP0369399B1 (en) | 1994-08-10 |
Family
ID=6367328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89121065A Expired - Lifetime EP0369399B1 (en) | 1988-11-17 | 1989-11-14 | Wind sifter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0369399B1 (en) |
| AT (1) | ATE109690T1 (en) |
| ES (1) | ES2057066T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193000A2 (en) † | 2000-09-27 | 2002-04-03 | Xerox Corporation | Article and apparatus for particulate separation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5252110A (en) * | 1990-08-01 | 1993-10-12 | Roland Nied | Preferably vertical air separator |
| US5899396A (en) * | 1995-09-04 | 1999-05-04 | Nied; Roland | Air separator and single-rotor air separator mill with such an air separator |
| DE102018132155B3 (en) * | 2018-12-13 | 2019-12-12 | Netzsch-Feinmahltechnik Gmbh | FLOWERS WITH SPECIAL FAN WHEEL |
| CN114917375B (en) * | 2022-06-14 | 2024-04-30 | 浙江湖州淳元智能科技有限公司 | Purifying sterilizer for comprehensively sterilizing viruses |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3491879A (en) * | 1967-04-18 | 1970-01-27 | Donaldson Co Inc | Centrifugal classifier |
| DE1757582C2 (en) * | 1968-05-20 | 1976-03-11 | The Georgia Marble Co., Atlanta, .Ga. (V.St.A.) | Centrifugal basket wind sifter |
| DE3303078C1 (en) * | 1983-01-29 | 1984-05-30 | Alpine Ag, 8900 Augsburg | Air classifier for the fine area |
| DE3508889C1 (en) * | 1985-03-13 | 1992-02-20 | Alpine Ag, 8900 Augsburg | Air classifier with wear-free classifying wheel |
| DD248970A1 (en) * | 1985-12-31 | 1987-08-26 | Akad Wissenschaften Ddr | centrifugal separator |
| DE3838871C2 (en) * | 1988-01-22 | 1994-10-27 | Nied Roland | Air classifier |
-
1989
- 1989-11-14 EP EP89121065A patent/EP0369399B1/en not_active Expired - Lifetime
- 1989-11-14 AT AT89121065T patent/ATE109690T1/en not_active IP Right Cessation
- 1989-11-14 ES ES89121065T patent/ES2057066T3/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1193000A2 (en) † | 2000-09-27 | 2002-04-03 | Xerox Corporation | Article and apparatus for particulate separation |
| EP1193000B2 (en) † | 2000-09-27 | 2009-11-11 | Xerox Corporation | Article, apparatus, process and kit for particulate separation |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE109690T1 (en) | 1994-08-15 |
| ES2057066T3 (en) | 1994-10-16 |
| EP0369399A3 (en) | 1991-06-12 |
| EP0369399A2 (en) | 1990-05-23 |
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