EP1184090A1 - Classifying rotor - Google Patents

Classifying rotor Download PDF

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Publication number
EP1184090A1
EP1184090A1 EP00890260A EP00890260A EP1184090A1 EP 1184090 A1 EP1184090 A1 EP 1184090A1 EP 00890260 A EP00890260 A EP 00890260A EP 00890260 A EP00890260 A EP 00890260A EP 1184090 A1 EP1184090 A1 EP 1184090A1
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EP
European Patent Office
Prior art keywords
angle
blades
blade wall
classifying
wheel
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Granted
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EP00890260A
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German (de)
French (fr)
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EP1184090B1 (en
Inventor
Josef Dipl.-Ing. Keuschnigg
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Individual
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Individual
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Priority to DE50006828T priority Critical patent/DE50006828D1/en
Priority to AT00890260T priority patent/ATE269174T1/en
Priority to ES00890260T priority patent/ES2220385T3/en
Priority to EP00890260A priority patent/EP1184090B1/en
Priority to US09/938,660 priority patent/US6644478B2/en
Publication of EP1184090A1 publication Critical patent/EP1184090A1/en
Application granted granted Critical
Publication of EP1184090B1 publication Critical patent/EP1184090B1/en
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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 a classifying wheel for a wind classifier with classifying wheel blades, whose radially outer blade ends in the direction of rotation of the sight wheel are inclined backwards.
  • Classifying wheels with classifying wheel blades which are inclined against the direction of rotation of the classifying wheel are e.g. known from DD 246 049 A1.
  • the visual behavior i.e. the exact There is generally a separation between coarse and fine grain The better the blades are inclined, the better. the bigger is the angle between the blades and the radial direction.
  • the invention is therefore based on the object, a generic To provide a view wheel by tilting backwards Blade ends achieve the best possible visual behavior, which is the result impending danger of deposits of visible material on the rear Avoid the bucket wall of the classifying wheel vanes as far as possible becomes.
  • the two desired ones Effects achieved in an advantageous manner.
  • a very inclined front blade wall good visual behavior achieved because of larger or heavier particles due to the strong inclination of the front blade wall and the result due to the higher centrifugal forces entering the channel between the sight wheel blades is difficult.
  • the lesser Inclination of the rear bucket wall of the sight wheel buckets with reference to the radial is further prevented that visible material on the attaches to the rear blade wall of the classifying wheel blades.
  • This will very strong inclinations of the blade ends possible, which are for powder qualities with a maximum grain size of less than 30 microns very advantageous impact.
  • the respective angle of the front and rear blade wall of the Sight wheel blades depend on several influencing factors, such as the speed of the sight wheel, type and composition of the sight good and desired selectivity. As a rule, however, good visual behavior achieved when the front blade wall is at an angle larger than about 45 ° and the rear bucket wall at an angle is inclined less than about 45 °.
  • Fig. 1 shows a section of a sight wheel according to the invention 1, which, as usual, has a hub 2 and an impeller ring 4, which are connected to each other via spokes 3.
  • a plurality of classifying wheel blades 5 are arranged, their radial outer blade ends 6 against the arrow 7
  • Direction of rotation of the sight wheel 1 are inclined backwards.
  • the blades 5 - seen in the direction of rotation 7 - have a front one Blade wall 8 and a rear blade wall 9.
  • the radially outer blade end 6 is the front blade wall 8 with respect to the radial direction 10 at an angle ⁇ of approximately 60 ° inclined, whereas the rear blade wall 9 at an angle ⁇ of is inclined approximately 45 °.
  • the outer blade end 6 is also an end face 11, which is shown in the Embodiment inclined to the radial 10 at an angle of 90 ° the outer radius of the classifying wheel in the area of the classifying wheel blades 5 defined.
  • the front blade wall 8 of the Class wheel blades 5 initially have a substantially flat region 12 on the inside of the classifying wheel 1 towards a curved area 13 passes.
  • the rear blade wall 9 of the sight wheel blades 5 is away from the outer blade end 6 with a substantially Continuous curvature equipped, the radius of curvature larger than the radius of curvature in area 13 on the front blade wall 8 is. This results in a cross-sectional shape of the classifying wheel blades 5, from the outer blade end 6 to the central region and then decreases towards the inner end 14 again.
  • the front blade wall 8 is in the region of the inner end 14 of the blades 5 inclined to be at an angle ⁇ to the radial in the direction of rotation 7 is inclined.
  • the angle ⁇ is preferably between 10 ° and 40 °, particularly preferably between 20 ° and 30 °.
  • Class wheel blades 5 shown, the front blade wall 8 in the area of the outer blade end 6 at an angle ⁇ of approx. 70 ° and their rear blade wall 9 an angle ⁇ of approx. 45 ° to the radial 10 are inclined.
  • the classifying wheel blades 5 from FIG. 2 also differ in this respect from the sight wheel blades 5 of Fig. 1 that in Fig. 2, the rear blade wall 9 in Area of the outer blade end 6 a substantially flat Has area 16.
  • the front blade wall 8 and the rear Blade wall 9 are connected to the flat areas 12 and 16 curved and can be approximately parallel in the region of the inner end 14 be aligned with the radial 10.
  • the classifying wheel according to the invention With the classifying wheel according to the invention, fine and very fine grain sizes can be achieved from a flow of particulate matter through targeted guidance of a Gas flow in the area of entry of the flow between the Classifying wheel blades (5) can be separated into the classifying wheel.
  • finest powder fractions can be obtained. This essentially becomes thereby achieved that the particle-laden gas flow of a higher Centrifugal force is applied to pass through the channels between the classifying vanes (5) to get into the inner area of the sight wheel, than this correspond to the peripheral speed of the classifying wheel would. Due to the lower inclination of the rear bucket wall (9) becomes the otherwise problematic deposition of visible material prevented on the rear bucket wall (9).

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  • Combined Means For Separation Of Solids (AREA)
  • Hydraulic Turbines (AREA)
  • Paper (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Cyclones (AREA)

Abstract

The sifter screen has blades (5) with outer blade ends (6) inclined towards the back in direction of screen rotation (7). The front blade wall (8) near the outer ends are inclined at a larger angle, e.g. more than 45 degrees , towards the radial direction (10), than the rear blade wall (2), which is at angle of less than 45 degrees . The blades are thicker in their central sections than in the end sections.

Description

Die Erfindung betrifft ein Sichtrad für einen Windsichter mit Sichtradschaufeln, deren radial außen liegenden Schaufelenden in Drehrichtung des Sichtrades rückwärts geneigt sind.The invention relates to a classifying wheel for a wind classifier with classifying wheel blades, whose radially outer blade ends in the direction of rotation of the sight wheel are inclined backwards.

Am weitesten verbreitet sind in der Praxis Sichträder mit radial ausgerichteten Sichtradschaufeln. Für Pulverqualitäten mit einem Größtkorn von etwa 100 Mikron sind damit auch zufriedenstellende Ergebnisse möglich.In practice, classifying wheels with radial are most widespread aligned view wheel blades. For powder qualities with one Largest grain of about 100 microns are therefore also satisfactory Results possible.

Wenn Pulverqualitäten mit einem Größtkorn von etwa 60 Mikron erzielt werden sollen, ist es vorteilhafter, Sichträder mit rückwärts geneigten Schaufeln zu verwenden. Sichträder mit Sichtradschaufeln, die gegen die Drehrichtung des Sichtrades geneigt sind, sind z.B. aus der DD 246 049 A1 bekannt. Das Sichtverhalten, d.h. die exakte Trennung zwischen grobem und feinem Korn ist dabei im allgemeinen umso besser, je stärker die Schaufeln geneigt sind, d.h. je größer der Winkel zwischen den Schaufeln und der radialen Richtung ist. Dabei tritt allerdings das Problem auf, daß der Neigungswinkel etwa mit etwa 35° begrenzt ist, da sich bei größeren Neigungen Sichtgut an der hinteren Schaufelwand der Sichtradschaufeln anlagern kann, da der Gleitwinkel zu gering wird und das Sichtgut von der Strömung nicht mehr weggefördert wird und Betriebsstörungen verursacht.When powder quality is achieved with a maximum grain size of around 60 microns should be, it is more advantageous to use rear view inclined wheels To use blades. Classifying wheels with classifying wheel blades, which are inclined against the direction of rotation of the classifying wheel are e.g. known from DD 246 049 A1. The visual behavior, i.e. the exact There is generally a separation between coarse and fine grain The better the blades are inclined, the better. the bigger is the angle between the blades and the radial direction. However, the problem arises that the angle of inclination approximately is limited to around 35 °, since there is visible material with larger inclinations can attach to the rear bucket wall of the sight wheel buckets, because the glide angle becomes too small and the visible material from the flow is no longer transported away and causes malfunctions.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes Sichtrad zur Verfügung zu stellen, bei dem durch rückwärts geneigte Schaufelenden ein möglichst gutes Sichtverhalten erzielt, die dadurch drohende Gefahr von Ablagerungen von Sichtgut an der hinteren Schaufelwand der Sichtradschaufeln aber soweit wie möglich vermieden wird.The invention is therefore based on the object, a generic To provide a view wheel by tilting backwards Blade ends achieve the best possible visual behavior, which is the result impending danger of deposits of visible material on the rear Avoid the bucket wall of the classifying wheel vanes as far as possible becomes.

Gelöst wird diese Aufgabe mit einem Sichtrad mit den Merkmalen des Anspruches 1.This task is solved with a classifying wheel with the characteristics of Claim 1.

Mit dem erfindungsgemäßen Sichtrad werden die beiden gewünschten Effekte auf vorteilhafte Weise erzielt. Zunächst wird durch die stark geneigte vordere Schaufelwand der Sichtradschaufeln ein sehr gutes Sichtverhalten erzielt, da größeren bzw. schwereren Partikeln durch die starke Neigung der vorderen Schaufelwand und den dadurch bedingten höheren Zentrifugalkräften der Eintritt in den Kanal zwischen den Sichtradschaufeln erschwert wird. Durch die geringere Neigung der hinteren Schaufelwand der Sichtradschaufeln mit Bezug zur Radialen wird des weiteren verhindert, daß sich Sichtgut an der hinteren Schaufelwand der Sichtradschaufeln anlagert. Dadurch werden sehr starke Neigungen der Schaufelenden möglich, die sich für Pulverqualitäten mit einem Größtkorn kleiner 30 Mikron sehr vorteilhaft auswirken.With the classifying wheel according to the invention, the two desired ones Effects achieved in an advantageous manner. First, through the Vane wheel blades a very inclined front blade wall good visual behavior achieved because of larger or heavier particles due to the strong inclination of the front blade wall and the result due to the higher centrifugal forces entering the channel between the sight wheel blades is difficult. By the lesser Inclination of the rear bucket wall of the sight wheel buckets with reference to the radial is further prevented that visible material on the attaches to the rear blade wall of the classifying wheel blades. This will very strong inclinations of the blade ends possible, which are for powder qualities with a maximum grain size of less than 30 microns very advantageous impact.

Der jeweilige Winkel der vorderen und hinteren Schaufelwand der Sichtradschaufeln hängt von mehreren Einflußfaktoren, wie der Drehzahl des Sichtrades, Art und Zusammensetzung des Sichtgutes und der gewünschten Trennschärfe ab. In der Regel wird aber ein gutes Sichtverhalten erzielt, wenn die vordere Schaufelwand in einem Winkel größer als etwa 45° und die hintere Schaufelwand in einem Winkel kleiner als etwa 45° geneigt ist.The respective angle of the front and rear blade wall of the Sight wheel blades depend on several influencing factors, such as the speed of the sight wheel, type and composition of the sight good and desired selectivity. As a rule, however, good visual behavior achieved when the front blade wall is at an angle larger than about 45 ° and the rear bucket wall at an angle is inclined less than about 45 °.

Bevorzugt ist im Rahmen der Erfindung, wenn die vordere Schaufelwand in einem Winkel zwischen 50° und 80°, vorzugsweise zwischen 60° und 70° zur radialen Richtung geneigt ist und wenn die hintere Schaufelwand in einem Winkel zwischen 30° und 45°, vorzugsweise etwa 40°, zur radialen Richtung geneigt ist.It is preferred within the scope of the invention if the front blade wall at an angle between 50 ° and 80 °, preferably between 60 ° and 70 ° to the radial direction and when the rear blade wall at an angle between 30 ° and 45 °, preferably about 40 °, is inclined to the radial direction.

Bei den genannten Winkeln wird in einer Vielzahl der Fälle ein sehr gutes Sichtverhalten erzielt werden können.At the angles mentioned, a very large number of cases good visibility can be achieved.

Weitere vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der übrigen Unteransprüche.Further advantageous embodiments of the invention are the subject matter of the other subclaims.

In der Folge werden bevorzugte Ausführungsformen der Erfindung mit Bezug auf die Zeichnungen näher erläutert.In the following, preferred embodiments of the invention are included With reference to the drawings explained.

Es zeigt:

  • Fig. 1 einen Ausschnitt aus einem Sichtrad mit Sichtradschaufeln einer ersten Ausführungsform und
  • Fig. 2 ebenfalls einen Ausschnitt aus einem Sichtrad mit einer weiteren Ausführungsform von Sichtradschaufeln.
    • It shows:
  • Fig. 1 shows a section of a classifying wheel with classifying wheel blades of a first embodiment and
  • Fig. 2 also shows a section of a classifying wheel with a further embodiment of classifying wheel blades.

    • Fig. 1 zeigt einen Ausschnitt aus einem erfindungsgemäßen Sichtrad 1, das wie üblich eine Nabe 2 und einen Schaufelradkranz 4 aufweist, die über Speichen 3 miteinander verbunden sind. Am Schaufelradkranz 4 ist eine Vielzahl von Sichtradschaufeln 5 angeordnet, deren radial außen liegenden Schaufelenden 6 gegen die mit Pfeil 7 bezeichnete Drehrichtung des Sichtrades 1 rückwärts geneigt sind.Fig. 1 shows a section of a sight wheel according to the invention 1, which, as usual, has a hub 2 and an impeller ring 4, which are connected to each other via spokes 3. On the paddle wheel rim 4, a plurality of classifying wheel blades 5 are arranged, their radial outer blade ends 6 against the arrow 7 Direction of rotation of the sight wheel 1 are inclined backwards.

    Die Schaufeln 5 weisen - in Drehrichtung 7 gesehen - eine vordere Schaufelwand 8 und eine hintere Schaufelwand 9 auf. Im Bereich des radial außen liegenden Schaufelendes 6 ist die vordere Schaufelwand 8 mit Bezug zur radialen Richtung 10 in einem Winkel α von etwa 60° geneigt, wogegen die hintere Schaufelwand 9 in einem Winkel β von ungefähr 45° geneigt ist. Im Bereich des äußeren Schaufelendes 6 liegt des weiteren noch eine Stirnfläche 11, die im dargestellten Ausführungsbeispiel zur Radialen 10 in einem Winkel von 90° geneigt ist, also den Außenradius des Sichtrades im Bereich der Sichtradschaufeln 5 definiert.The blades 5 - seen in the direction of rotation 7 - have a front one Blade wall 8 and a rear blade wall 9. In the area of The radially outer blade end 6 is the front blade wall 8 with respect to the radial direction 10 at an angle α of approximately 60 ° inclined, whereas the rear blade wall 9 at an angle β of is inclined approximately 45 °. In the area of the outer blade end 6 is also an end face 11, which is shown in the Embodiment inclined to the radial 10 at an angle of 90 ° the outer radius of the classifying wheel in the area of the classifying wheel blades 5 defined.

    Wie in Fig. 1 zu sehen ist, weist die vordere Schaufelwand 8 der Sichtradschaufeln 5 zunächst einen im wesentlichen ebenen Bereich 12 auf, der zum Inneren des Sichtrades 1 hin in einen gekrümmten Bereich 13 übergeht. Die hintere Schaufelwand 9 der Sichtradschaufeln 5 ist vom äußeren Schaufelende 6 weg mit einer im wesentlichen kontinuierlichen Krümmung ausgestattet, deren Krümmungsradius größer als der Krümmungsradius im Bereich 13 an der vordere Schaufelwand 8 ist. Dadurch ergibt sich eine Querschnittsform der Sichtradschaufeln 5, die vom äußeren Schaufelende 6 zum Mittelbereich hin zu und dann zum inneren Ende 14 hin wieder abnimmt. Die vordere Schaufelwand 8 ist dabei im Bereich des inneren Endes 14 der Schaufeln 5 derart geneigt, daß sie um einen Winkel γ zur Radialen in Drehrichtung 7 geneigt ist. Der Winkel γ liegt vorzugsweise zwischen 10° und 40°, besonders bevorzugt zwischen 20° und 30°.As can be seen in Fig. 1, the front blade wall 8 of the Class wheel blades 5 initially have a substantially flat region 12 on the inside of the classifying wheel 1 towards a curved area 13 passes. The rear blade wall 9 of the sight wheel blades 5 is away from the outer blade end 6 with a substantially Continuous curvature equipped, the radius of curvature larger than the radius of curvature in area 13 on the front blade wall 8 is. This results in a cross-sectional shape of the classifying wheel blades 5, from the outer blade end 6 to the central region and then decreases towards the inner end 14 again. The front blade wall 8 is in the region of the inner end 14 of the blades 5 inclined to be at an angle γ to the radial in the direction of rotation 7 is inclined. The angle γ is preferably between 10 ° and 40 °, particularly preferably between 20 ° and 30 °.

    Dadurch ergibt sich ein Strömungskanal 15 zwischen zwei benachbarten Sichtradschaufeln 5, der sich von außen nach innen verlaufend zuerst verengt und anschließend wieder erweitert, was sich auf das Sichtverhalten und die Gefahr von Ablagerungen auf der hinteren Schaufelwand 9 der Sichtradschaufeln ebenfalls günstig auswirkt. This results in a flow channel 15 between two neighboring ones Class wheel 5, which runs from the outside in first narrowed and then expanded again, which affects the viewing behavior and the risk of deposits on the rear bucket wall 9 of the sight wheel blades also has a favorable effect.

    In Fig. 2 ist schematisch eine weitere Ausführungsform von erfindungsgemäßen Sichtradschaufeln 5 dargestellt, deren vordere Schaufelwand 8 im Bereich des äußeren Schaufelendes 6 in einem Winkel α von ca. 70° und deren hintere Schaufelwand 9 einen Winkel β von ca. 45° zur Radialen 10 geneigt sind. Die Sichtradschaufeln 5 von Fig. 2 unterscheiden sich weiters dahingehend von den Sichtradschaufeln 5 von Fig. 1, daß in Fig. 2 auch die hintere Schaufelwand 9 im Bereich des äußeren Schaufelendes 6 einen im wesentlichen ebenen Bereich 16 aufweist. Die vordere Schaufelwand 8 und die hintere Schaufelwand 9 sind im Anschluß an die ebenen Bereiche 12 und 16 gekrümmt und können im Bereich des inneren Endes 14 etwa parallel zur Radialen 10 ausgerichtet sein.2 schematically shows a further embodiment of the invention Class wheel blades 5 shown, the front blade wall 8 in the area of the outer blade end 6 at an angle α of approx. 70 ° and their rear blade wall 9 an angle β of approx. 45 ° to the radial 10 are inclined. The classifying wheel blades 5 from FIG. 2 also differ in this respect from the sight wheel blades 5 of Fig. 1 that in Fig. 2, the rear blade wall 9 in Area of the outer blade end 6 a substantially flat Has area 16. The front blade wall 8 and the rear Blade wall 9 are connected to the flat areas 12 and 16 curved and can be approximately parallel in the region of the inner end 14 be aligned with the radial 10.

    Mit dem erfindungsgemäßen Sichtrad können feine und feinste Körnungen aus einem Partikelmaterialstrom durch gezielte Führung einer Gasströmung im Bereich des Eintritts der Strömung zwischen die Sichtradschaufeln (5) in das Sichtrad separiert werden. Mit der Erfindung können mit möglichst niedrigen Drehzahlen des Sichtrades feinste Pulverfraktionen erhalten werden. Dies wird im wesentlichen dadurch erreicht, daß die partikelbeladene Gasströmung einer höheren Fliehkraft ausgesetzt ist, um durch die Kanäle zwischen den Sichtradschaufeln (5) in den inneren Bereich des Sichtrades zu gelangen, als dies der Umfangsgeschwindigkeit des Sichtrades entsprechen würde. Durch die geringere Neigung der hinteren Schaufelwand (9) wird gleichzeitig die sonst problematische Ablagerung von Sichtgut an der hinteren Schaufelwand (9) verhindert.With the classifying wheel according to the invention, fine and very fine grain sizes can be achieved from a flow of particulate matter through targeted guidance of a Gas flow in the area of entry of the flow between the Classifying wheel blades (5) can be separated into the classifying wheel. With the Invention can with the lowest possible speeds of the classifying wheel finest powder fractions can be obtained. This essentially becomes thereby achieved that the particle-laden gas flow of a higher Centrifugal force is applied to pass through the channels between the classifying vanes (5) to get into the inner area of the sight wheel, than this correspond to the peripheral speed of the classifying wheel would. Due to the lower inclination of the rear bucket wall (9) becomes the otherwise problematic deposition of visible material prevented on the rear bucket wall (9).

    Claims (7)

    Sichtrad für einen Windsichter mit Sichtradschaufeln (5), deren radial außen liegenden Schaufelenden (6) in Drehrichtung (7) des Sichtrades (1) rückwärts geneigt sind, dadurch gekennzeichnet, daß im Bereich des radial außen liegenden Schaufelendes (6) der Sichtradschaufeln (5) die in Drehrichtung (7) gesehen vordere Schaufelwand (8) der Sichtradschaufeln (5) zur radialen Richtung (10) in einem größeren Winkel geneigt ist als die hintere Schaufelwand (2).Classifier wheel for a wind classifier with classifier wheel blades (5), the radially outer blade ends (6) of which are inclined backwards in the direction of rotation (7) of the classifier wheel (1), characterized in that in the region of the radially outer blade end (6) of the classifier wheel blades (5 ) seen in the direction of rotation (7) front blade wall (8) of the classifying wheel blades (5) to the radial direction (10) is inclined at a greater angle than the rear blade wall (2). Sichtrad nach Anspruch 1, dadurch gekennzeichnet, daß die vordere Schaufelwand (8) in einem Winkel (α) größer als 45° und die hintere Schaufelwand (9) in einem Winkel (β) kleiner als 45° geneigt ist.Classifying wheel according to claim 1, characterized in that the front blade wall (8) is inclined at an angle (α) greater than 45 ° and the rear blade wall (9) is inclined at an angle (β) less than 45 °. Sichtrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die vordere Schaufelwand (8) in einem Winkel (α) zwischen 50° und 80°, vorzugsweise zwischen 60° und 70° zur radialen Richtung (10) geneigt ist.Classifying wheel according to claim 1 or 2, characterized in that the front blade wall (8) is inclined at an angle (α) between 50 ° and 80 °, preferably between 60 ° and 70 °, with respect to the radial direction (10). Sichtrad nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die hintere Schaufelwand (9) in einem Winkel (β) zwischen 30° und 45°, vorzugsweise etwa 40°, zur radialen Richtung (10) geneigt ist.Classifying wheel according to one of claims 1 to 3, characterized in that the rear blade wall (9) is inclined at an angle (β) between 30 ° and 45 °, preferably approximately 40 °, to the radial direction (10). Sichtrad nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die vordere Schaufelwand (8) und die hintere Schaufelwand (9) in einem vom radial außen liegenden Schaufelende (6) entfernten Bereich zur radialen Richtung (10) hin gekrümmt sind.Classifying wheel according to one of claims 1 to 4, characterized in that the front blade wall (8) and the rear blade wall (9) are curved toward the radial direction (10) in a region remote from the radially outer blade end (6). Sichtrad nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Sichtradschaufeln (5) in ihrem Mittelbereich einen stärkeren Querschnitt aufweisen als im Bereich des radial außen liegenden Schaufelendes (6) und des radial innen liegenden Schaufelendes (14).Classifying wheel according to one of claims 1 to 5, characterized in that the classifying wheel blades (5) have a larger cross section in their central region than in the region of the radially outer blade end (6) and the radially inner blade end (14). Sichtrad nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die vordere Schaufelwand (8) der Sichtradschaufeln (5) im Bereich des radial innen liegenden Endes (14) mit Bezug zur radialen Richtung (10) in einem Winkel (γ) zwischen 10° und 40°, vorzugsweise zwischen 20° und 30° in Drehrichtung (7) geneigt ist.Classifying wheel according to one of claims 1 to 6, characterized in that the front blade wall (8) of the classifying wheel blades (5) in the region of the radially inner end (14) with respect to the radial direction (10) at an angle (γ) between 10 ° and 40 °, preferably between 20 ° and 30 ° in the direction of rotation (7).
    EP00890260A 2000-08-28 2000-08-28 Classifying rotor Expired - Lifetime EP1184090B1 (en)

    Priority Applications (5)

    Application Number Priority Date Filing Date Title
    DE50006828T DE50006828D1 (en) 2000-08-28 2000-08-28 classifying wheel
    AT00890260T ATE269174T1 (en) 2000-08-28 2000-08-28 VISION WHEEL
    ES00890260T ES2220385T3 (en) 2000-08-28 2000-08-28 SEPARATOR WHEEL.
    EP00890260A EP1184090B1 (en) 2000-08-28 2000-08-28 Classifying rotor
    US09/938,660 US6644478B2 (en) 2000-08-28 2001-08-27 Separating wheel

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP00890260A EP1184090B1 (en) 2000-08-28 2000-08-28 Classifying rotor

    Publications (2)

    Publication Number Publication Date
    EP1184090A1 true EP1184090A1 (en) 2002-03-06
    EP1184090B1 EP1184090B1 (en) 2004-06-16

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00890260A Expired - Lifetime EP1184090B1 (en) 2000-08-28 2000-08-28 Classifying rotor

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    US (1) US6644478B2 (en)
    EP (1) EP1184090B1 (en)
    AT (1) ATE269174T1 (en)
    DE (1) DE50006828D1 (en)
    ES (1) ES2220385T3 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10261448A1 (en) * 2002-12-31 2004-07-29 Nied, Roland, Dr.-Ing. Vaned rotor for particulate mill wind guide has vanes extending radially with different angles to tangents at leading and trailing edges
    WO2017178379A3 (en) * 2016-04-11 2017-12-07 Neuman & Esser Gmbh Mahl- Und Sichtsysteme Separator

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN103480577A (en) * 2013-09-30 2014-01-01 阳承君 Impeller of grader
    US10744534B2 (en) * 2016-12-02 2020-08-18 General Electric Technology Gmbh Classifier and method for separating particles
    JP2022156406A (en) * 2021-03-31 2022-10-14 三菱重工業株式会社 Classifier and power plant, and operation method of classifier

    Citations (3)

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    US6644478B2 (en) 2003-11-11
    DE50006828D1 (en) 2004-07-22
    US20020033357A1 (en) 2002-03-21
    ES2220385T3 (en) 2004-12-16
    EP1184090B1 (en) 2004-06-16
    ATE269174T1 (en) 2004-07-15

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