EP0818249B1 - Roue de triage pour séparateur pneumatique - Google Patents

Roue de triage pour séparateur pneumatique Download PDF

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Publication number
EP0818249B1
EP0818249B1 EP97890123A EP97890123A EP0818249B1 EP 0818249 B1 EP0818249 B1 EP 0818249B1 EP 97890123 A EP97890123 A EP 97890123A EP 97890123 A EP97890123 A EP 97890123A EP 0818249 B1 EP0818249 B1 EP 0818249B1
Authority
EP
European Patent Office
Prior art keywords
classifying rotor
channels
classifying
wheel
rotor according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97890123A
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German (de)
English (en)
Other versions
EP0818249A1 (fr
Inventor
Josef Dipl.-Ing. Keuschnigg
Jürgen Dipl.-Ing. Roth
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.)
PMT-JETMILL GmbH
Original Assignee
PMT JETMILL GmbH
PMT-Jetmill GmbH
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Publication date
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Application filed by PMT JETMILL GmbH, PMT-Jetmill GmbH filed Critical PMT JETMILL GmbH
Publication of EP0818249A1 publication Critical patent/EP0818249A1/fr
Application granted granted Critical
Publication of EP0818249B1 publication Critical patent/EP0818249B1/fr
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Classifications

    • 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 a cylindrical surface and channels on its circumference through which the classifying wheel is loaded with the fine material Visible air flows through from outside to inside and where the fine air loaded with fine material in the axial direction is removed from the classifier wheel.
  • Sifters have the task of being carried in the visible air Separate visible material into fine and coarse material, which, e.g. in EP-A1 552 837 described, can be done in that a Classification wheel of an air classifier approximately radially from the outside inwards is flowed through, after which the fine air laden with fine material in axial direction is discharged from the classifying wheel. Through the Rotation of the classifying wheel and the resulting centrifugal forces in the channels or in the area of the outer mouths of the Channels, the coarse material is thrown outwards and cannot with the visible air and the fine material are discharged to the inside.
  • EP-A1 552 837 it was proposed in EP-A1 552 837 to arrange a distribution pipe within the classifying wheel, in which a plurality of openings is provided, wherein the size of the openings from the axial outflow end of the classifying wheel away increases more and more. Through the smaller openings near the The flow resistance at the outflow end is higher than in the outflow end distant area, so that a more constant Course of the flow velocity or the acting Negative pressure within the classifying wheel via the axial Length of the same is reached.
  • WO 95/07149 describes how to achieve improved selectivity proposed for a classifying wheel with a cylindrical Lateral surface the interior of the classifying rotor in several Subdivide axial sections, which are connected via coaxial connecting pieces with a common fine material outlet stand, which are each over an axial section and effective flow cross-sections setting the associated connecting piece are essentially the same size, whereby approximately the same pressure ratios in each axial section to adjust.
  • a classifying wheel which is a truncated cone Has lateral surface and divided into sections is in which on the one hand the cone angle of the truncated cone and on the other hand, the angles of the wheel blades are different. Since the centrifugal force and the peripheral speed from Depend on the radius of the classifying wheel, a smaller radius of the Visual wheels to a higher flow rate in the Classifying wheel. In addition, the lower centrifugal force in this allows Area of larger and heavier particles entering the classifying wheel. This effect is supported by the fact that due to the smaller angle of inclination of the classifying wheel blades Radials entering the area with the smaller diameter larger and heavier particles into the classifier wheel is facilitated.
  • the invention has for its object a sight wheel to provide the type mentioned at the beginning, with which As constant as possible over the axial length of the classifying wheel Separation behavior can be achieved.
  • This task is solved with a generic classifying wheel characterized in that the channels in the area of the lateral surface in axial different radial planes at different angles are inclined to the radial direction of the classifying wheel.
  • the rejection on the rotor outer radius does not only affect the Visible air, but also very effectively on the particles.
  • the invention thus takes advantage of the fact that the Inflow of the fine air laden visual air to the outer mouth of the channels from the inclination of the channels to the radial direction the sight wheel is influenced. Therefore, the channels in axially different radial planes in different Angles aligned with the radial direction of the classifying wheel, then those mentioned above can be more even Separation properties can be achieved through the classifying wheel without that there are additional facilities, such as a manifold according to EP-A1 552 837, what throttle losses or cause high pressure drops.
  • Fig. 1 is a wind sifter schematically with an inventive Classification wheel 20 is shown schematically, the Classifying wheel 20 in a housing 21 with an inlet 23 for classifying air with exposed material and an outlet 22 for coarse material is. The classifying air is removed with a classifying material axial outlet 24.
  • housing 21 instead of that shown in FIGS. 1 and 2 and described housing 21 also other forms of Housings can be used and that the visual air and Visible material is also fed separately into the housing 21 can be.
  • Fig. 3 an inventive sight wheel 20 is in section partially shown, which consists of five classifying wheel sections 1, 2 and 3 is built.
  • the classifying wheel 20 becomes classifying air with classifying material fed in the direction of arrows 5 and loaded with fines Visual air is at the outflow end 13 in the direction of arrow 4 discharged through the outlet 24 from the classifying wheel.
  • the classifying wheel sections 1 and 2 consist of one Carrier 6, which is connected to a hub 8 via five spokes 7 is.
  • a plurality of wheel blades 9, 9 ' is on the carrier 6 arranged, which is in the axial direction of the classifying wheel section 1, 1 'extend.
  • the wheel blades 9, 9 ' can be radial Direction of the classifying wheel section 1, 1 'angled, like is shown using the wheel blades 9, or be curved.
  • the wheel blades can also be designed as flat rotor bars, as is shown in the Wheel blades 9 'is shown in Fig. 4.
  • the wheel blades 9, 9 ' In its outer In the area, the wheel blades 9, 9 'have an angle of inclination ⁇ to the radial.
  • the angle of inclination ⁇ in the outer area determines the visual behavior more than the angle of inclination in the inner region of the channels 12 in the wheel blades 9th
  • ⁇ the angle to the radial inclined that they run from the inside to the outside
  • Direction of rotation 10 of the sight wheel 20 are inclined.
  • the classifying wheel section 3 in FIG. 3 differs in that 4 of the sight wheel sections 1, 2 et al in that the carrier 6 does not have spokes with the Hub 8 is connected, but via a continuous disc 14, as can be seen in FIG. 3. This is necessary because the Classifying wheel section 3 at the outflow end 13 of the classifying wheel End is arranged and thus the conclusion of the classifying wheel.
  • the angle of inclination ⁇ of the sight wheel sections 1, 2 and 3 is at the sight wheel sections 2 and 3 larger than the sight wheel sections 1. Due to the larger angle of inclination of the wheel blades 9, 9 'or the channels 12 formed between them the rejection for the visible air particle flow increased so that here the passage of larger particles is prevented and thus an improved separation behavior of the entire rotor precise separation is achieved.
  • classifying wheel section shown in FIG. 4 not exactly with the classifying wheel sections shown in FIG. 3 coincides, since it is in the in Fig. 4th illustrated wheel section around an integral part is, in which the blades 9, 9 'formed on the carrier 6 are, whereas it is with the classifying wheel sections shown in FIG. 3 are those in which between support disks 16, 16 ', 16 ", blades 9, 9' held positively are, as can be seen in FIGS. 5 and 6 in detail.
  • the middle support disks 16 point to both of them End faces 25 circumferential grooves 26 in which the Blades 9, 9 'are added with their ends 27.
  • spacers 28 are provided, which are a total have an annular shape and in the groove 26 on both sides the support disk 16 are inserted.
  • the spacers 28 radially (around the Inclination angle ⁇ inclined to the radial) open to the outside Slits in which the blades 9, 9 'lie.
  • the construction of the classifying wheel 20 from support disks just described 16, 16 ', 16 ", between which the blades 9, 9' are held positively without penetrating them the advantage that the sight wheel 20 is very stable overall is constructed because the support disks 16 through their continuous annular cross section have a high load-bearing capacity. It is understood that this structure of a classifying wheel Carrying disks and blades held in a positive manner between them can also be used with classifying wheels, where the channels between the blades over the entire length of the classifying wheel have substantially the same orientation.
  • the classifying wheel sections are 1, 2 and 3 placed on a shaft 15 in a rotationally fixed manner, over which the sight wheel sections 1, 2 and 3 with a Drive, not shown, are driven.
  • the angle of inclination of those formed between the wheel blades 9, 9 ' Channels 12 is preferably between 30 ° and 45 °, can, however, depending on the respective conditions, such as the particle size or the specific weight of the particles the material to be viewed or the desired fraction ratio between Coarse and fine goods, also above or below, for example between 15 ° and 60 °.
  • Embodiment can the fine air loaded with fine material also at both axial ends of the classifying wheel via outflow channels dissipated to the performance of the invention Classifier.
  • a classifying wheel 20 for a wind classifier has channels 12 on its circumference, through which the classifying wheel 20 is flowed from outside to inside by the classifying air laden with fine material. Subsequently, the classifying air loaded with fine material is discharged from the classifying wheel 20 in the axial direction.
  • the channels 12 In axially different radial planes, the channels 12 have different angles ⁇ to the radial direction of the classifying wheel 20, the angle of inclination ⁇ of the channels 12 near the outflow end 13 of the classifying wheel being greater than the angle of inclination ⁇ of the channels 12 away from the outflow end 13.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Claims (15)

  1. Rotor de séparateur pour un séparateur pneumatique, comportant une paroi extérieure cylindrique avec sur son pourtour des canaux, par l'intermédiaire desquels le rotor de séparateur est traversé de l'extérieur vers l'intérieur par l'air de séparation chargé en particules fines, et dans lequel l'air de séparation chargé en particules fines est évacué du rotor de séparateur dans la direction axiale, caractérisé en ce que les canaux (12), dans la région de la paroi extérieure, sont disposés dans des plans radiaux différents et sont inclinés avec des angles d'inclinaison (α) différents par rapport à la direction radiale durotor de séparateur.
  2. Rotor de séparateur selon la revendication 1, caractérisé en ce que les canaux (12) sont formés par des ouvertures, en particulier des trous, dans la paroi extérieure du rotor de séparateur.
  3. Rotor de séparateur selon la revendication 1 ou 2, caractérisé en ce que les canaux (12) sont délimités par des ailettes (9, 9') disposées essentiellement axialement.
  4. Rotor de séparateur selon une des revendications 1 à 3, caractérisé en ce que le rotor de séparateur est formé d'au moins deux tronçons (1, 2, 3) de rotor et en ce que les canaux (12) d'un tronçon (1, 2, 3) de rotor de séparateur sont orientés sous un angle (α)par rapport à la direction différent de celui des canaux (12) des autres tronçons (1, 2, 3) de rotor de séparateur.
  5. Rotor de séparateur selon une des revendications 1 à 4, caractérisé en ce que l'angle d'inclinaison (α) des canaux (12) par rapport à la direction radiale change de l'extérieur vers l'intérieur.
  6. Rotor de séparateur selon les revendications 3 et 5, caractérisé en ce que les ailettes de la roue (9, 9') présentent un tracé courbe.
  7. Rotor de séparateur selon une des revendications 1 à 6, caractérisé en ce que les canaux (12) sont inclinés de l'intérieur vers l'extérieur, dans la direction opposée au sens de rotation (10).
  8. Rotor de séparateur selon une des revendications 1 à 7, caractérisé en ce que l'angle d'inclinaison des canaux (12) est compris entre environ 15° et 60°, en particulier entre 30° et 45°, par rapport à la direction radiale.
  9. Rotor de séparateur selon une des revendications 1 à 8, caractérisé en ce que l'angle d'inclinaison (α) des canaux (12), dans le voisinage de l'extrémité de sortie (13) du rotor de séparateur, est supérieur à l'angle d'inclinaison (α) des canaux (12) éloignés de l'extrémité de sortie (13).
  10. Rotor de séparateur selon une des revendications 1 à 9, caractérisé en ce que deux canaux de sortie sont prévus, canaux qui se raccordent au rotor de séparateur en des points opposés et par lesquels l'air de séparation chargé en produit fin est évacué.
  11. Rotor de séparateur selon une des revendications 3 à 10, caractérisé en ce que les tronçons de rotor de séparateur (1, 2) sont constitués d'un support (6, 6') en forme de disque annulaire sur lequel sont formées les ailettes (9, 9') qui s'étendent dans la direction axiale.
  12. Rotor de séparateur selon une des revendications 3 à 10, caractérisé en ce qu'il est prévu des disques supports (16, 16', 16") qui s'étendent dans la direction radiale et entre lesquels les ailettes (9, 9') des roues sont tenues par complémentarité de formes.
  13. Rotor de séparateur selon la revendication 12, caractérisé en ce que les ailettes (9, 9') ne traversent pas les disques supports (16, 16', 16").
  14. Rotor de séparateur selon la revendication 12 ou 13, caractérisé en ce que, dans la région des bords extérieurs des disques supports (16, 16', 16"), dans les faces frontales (25) de ceux-ci, sont disposés des évidements (26) dans lesquels les ailettes (9, 9') sont tenues par leurs extrémités (27).
  15. Rotor de séparateur selon la revendication 14, caractérisé en ce que les évidements (26) sont des gorges annulaires et en ce que les ailettes (9, 9') sont tenues en position dans les gorges annulaires (26) par des éléments d'espacement (28).
EP97890123A 1996-07-08 1997-07-03 Roue de triage pour séparateur pneumatique Expired - Lifetime EP0818249B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT1205/96 1996-07-08
AT120596 1996-07-08
AT0120596A AT404234B (de) 1996-07-08 1996-07-08 Sichtrad für einen windsichter
US08/889,577 US5957299A (en) 1996-07-08 1997-07-08 Separator wheel for an air separator

Publications (2)

Publication Number Publication Date
EP0818249A1 EP0818249A1 (fr) 1998-01-14
EP0818249B1 true EP0818249B1 (fr) 2002-02-06

Family

ID=25595189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97890123A Expired - Lifetime EP0818249B1 (fr) 1996-07-08 1997-07-03 Roue de triage pour séparateur pneumatique

Country Status (6)

Country Link
US (1) US5957299A (fr)
EP (1) EP0818249B1 (fr)
JP (1) JPH10128242A (fr)
CN (1) CN1176156A (fr)
AT (1) AT404234B (fr)
CA (1) CA2209145C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3677348B1 (fr) 2018-12-13 2023-09-06 NETZSCH-Feinmahltechnik GmbH Séparateur de force centrifuge doté d'une roue de séparateur spéciale

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6110242A (en) * 1998-10-13 2000-08-29 Blower Application Company, Inc. Apparatus for separating solids from a gas
EP1184090B1 (fr) * 2000-08-28 2004-06-16 Josef Dipl.-Ing. Keuschnigg Roue de triage
DE10261448A1 (de) * 2002-12-31 2004-07-29 Nied, Roland, Dr.-Ing. Beschaufelter Sichtrotor für Windsichter
DE102004053530B4 (de) * 2004-11-05 2008-04-30 Aufbereitungstechnologie Noll Gmbh Sichterrad für eine Vorrichtung zur Trennung staubförmiger, fasriger oder körniger Güter
DE102007021545B4 (de) 2007-05-08 2011-07-28 Polysius AG, 59269 Vorrichtung und Verfahren zum Sichten von Aufgabegut und Mahlanlage
JP5151940B2 (ja) * 2008-12-03 2013-02-27 株式会社リコー 分級装置
CN104576719B (zh) * 2014-12-03 2017-11-24 华为技术有限公司 隧穿场效应晶体管及其制备方法
CN105583155B (zh) * 2016-03-23 2018-10-30 君联益能（北京）科技有限公司 双调节分流式高效分离器
DE102017108168A1 (de) * 2017-04-18 2018-10-18 Hengst Se Rotor eines Zentrifugalabscheiders zum Abscheiden von Flüssigkeits- und/oder Feststoffpartikeln aus einem Gasstrom
CN109590215B (zh) * 2018-12-11 2023-08-25 天津艾惟科技有限公司 多级颗粒分选机

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3677348B1 (fr) 2018-12-13 2023-09-06 NETZSCH-Feinmahltechnik GmbH Séparateur de force centrifuge doté d'une roue de séparateur spéciale
EP3925709B1 (fr) 2018-12-13 2023-10-18 NETZSCH-Feinmahltechnik GmbH Séparateur de force centrifuge doté d'une roue de séparateur spéciale

Also Published As

Publication number Publication date
EP0818249A1 (fr) 1998-01-14
ATA120596A (de) 1998-02-15
JPH10128242A (ja) 1998-05-19
CA2209145C (fr) 2005-01-04
AT404234B (de) 1998-09-25
CN1176156A (zh) 1998-03-18
US5957299A (en) 1999-09-28
CA2209145A1 (fr) 1998-01-08

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