EP0818249B1 - Sichtrad für einen Windsichter - Google Patents
Sichtrad für einen Windsichter Download PDFInfo
- 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
Links
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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)
Description
Ein Sichtrad 20 für einen Windsichter weist an seinem Umfang Kanäle 12 auf, durch welche das Sichtrad 20 von der mit Feingut beladenen Sichtluft von außen nach innen durchströmt wird. Anschließend wird die mit Feingut beladene Sichtluft in axialer Richtung aus dem Sichtrad 20 abgeführt. Die Kanäle 12 weisen in axial unterschiedlichen radialen Ebenen unterschiedliche Winkel α zur radialen Richtung des Sichtrades 20 auf, wobei der Neigungswinkel α der Kanäle 12 nahe dem Abströmende 13 des Sichtrades größer ist als der Neigungswinkel α der vom Abströmende 13 entfernten Kanäle 12.
Claims (15)
- Sichtrad für einen Windsichter, das eine zylindrische Mantelfläche und an seinem Umfang Kanäle aufweist, durch welche das Sichtrad von der mit Feingut beladenen Sichtluft von außen nach innen durchströmt wird und bei dem die mit Feingut beladene Sichtluft in axialer Richtung aus dem Sichtrad abgeführt wird, dadurch gekennzeichnet, daß die Kanäle (12) im Bereich der Mantelfläche in axial unterschiedlichen radialen Ebenen in unterschiedlichen Winkeln (α) zur radialen Richtung des Sichtrades geneigt sind.
- Sichtrad nach Anspruch 1, dadurch gekennzeichnet, daß die Kanäle (12) durch Durchbrechungen, insbesondere Bohrungen, in der Mantelfläche des Sichtrades gebildet sind.
- Sichtrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kanäle (12) durch im wesentlichen axial ausgerichtete Radschaufeln (9, 9') begrenzt sind.
- Sichtrad nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Sichtrad aus wenigstens zwei Sichtradabschnitten (1, 2, 3) besteht und daß die Kanäle (12) eines Sichtradabschnittes (1, 2, 3) in einem anderen Winkel (α) zur radialen Richtung ausgerichtet sind als die Kanäle (12) der anderen Sichtradabschnitte (1, 2, 3).
- Sichtrad nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich der Neigungswinkel (α) der Kanäle (12) zur radialen Richtung von außen nach innen ändert.
- Sichtrad nach Anspruch 3 und 5, dadurch gekennzeichnet, daß die Radschaufeln (9, 9') einen gekrümmten Verlauf haben.
- Sichtrad nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Kanäle (12) von innen nach außen entgegen der Drehrichtung (10) geneigt sind.
- Sichtrad nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Neigungswinkel der Kanäle (12) etwa zwischen 15° und 60°, insbesondere zwischen 30° und 45° zur radialen Richtung beträgt.
- Sichträd nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Neigungswinkel (α) der Kanäle (12) nahe dem Abströmende (13) des Sichtrades größer ist als der Neigungswinkel (α) der vom Abströmende (13) entfernten Kanäle (12).
- Sichtrad nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß zwei Abströmkanäle vorgesehen sind, die an gegenüberliegenden Seiten axial an das Sichtrad anschließen und durch welche die mit Feingut beladene Sichtluft abgeführt wird.
- Sichtrad nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß die Sichtradabschnitte (1, 2) aus einem ringscheibenförmigen Träger (6, 6') bestehen, an welchem die Sichtradschaufeln (9, 9') in axialer Richtung abstehend angeformt sind.
- Sichtrad nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß sich radial erstreckende Tragscheiben (16, 16', 16") vorgesehen sind, zwischen denen die Radschaufeln (9, 9') formschlüssig gehalten sind.
- Sichtrad nach Anspruch 12, dadurch gekennzeichnet, daß die Radschaufeln (9, 9') die Tragscheiben (16, 16', 16") nicht durchdringen.
- Sichtrad nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß im Bereich der äußeren Ränder der Tragscheiben (16, 16', 16") an den Stirnflächen (25) Ausnehmungen (26) angeordnet sind, in welchen die Radschaufeln (9, 9') mit ihren Enden (27) aufgenommen sind.
- Sichtrad nach Anspruch 14, dadurch gekennzeichnet, daß die Ausnehmungen (26) ringförmige Nuten sind und daß die Radschaufeln (9,9') durch Distanzhalter (28) in ihrer Lage in den ringförmigen Nuten (26) festgelegt sind.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT120596 | 1996-07-08 | ||
AT1205/96 | 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 (de) | 1998-01-14 |
EP0818249B1 true EP0818249B1 (de) | 2002-02-06 |
Family
ID=25595189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97890123A Expired - Lifetime EP0818249B1 (de) | 1996-07-08 | 1997-07-03 | Sichtrad für einen Windsichter |
Country Status (6)
Country | Link |
---|---|
US (1) | US5957299A (de) |
EP (1) | EP0818249B1 (de) |
JP (1) | JPH10128242A (de) |
CN (1) | CN1176156A (de) |
AT (1) | AT404234B (de) |
CA (1) | CA2209145C (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3677348B1 (de) | 2018-12-13 | 2023-09-06 | NETZSCH-Feinmahltechnik GmbH | Fliehkraftsichter mit speziellem sichterrad |
Families Citing this family (10)
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 |
DE50006828D1 (de) * | 2000-08-28 | 2004-07-22 | Keuschnigg Josef | Sichtrad |
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 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US40238A (en) * | 1863-10-13 | Improvement in smut-mills | ||
US2367906A (en) * | 1942-01-09 | 1945-01-23 | Wall | Apparatus for separating wood flour |
DE816941C (de) * | 1947-03-24 | 1951-10-15 | Spillers Ltd | Verfahren und Vorrichtung zur Behandlung von Getreide nach dem Waschen und Schleudern |
DE2012797C3 (de) * | 1970-03-18 | 1973-11-29 | G. Siempelkamp & Co, 4150 Krefeld | Vorrichtung zum Sichten von Schüttgütern |
DE2613611A1 (de) * | 1976-03-30 | 1977-10-13 | Satake Eng Co Ltd | Kornreinigungsmaschine |
US4257880A (en) * | 1979-06-28 | 1981-03-24 | Jones Donald W | Centrifugal air classifying apparatus |
GB8401009D0 (en) * | 1984-01-14 | 1984-02-15 | Northern Eng Ind | Classifier |
FR2574392B1 (fr) * | 1984-12-07 | 1987-02-06 | Morielli Daniel | Dispositif d'usinage d'un produit plat en verre |
GB2176134A (en) * | 1985-06-03 | 1986-12-17 | Smidth & Co As F L | Separator for sorting particulate material |
DE3545691C1 (de) * | 1985-12-21 | 1987-01-29 | Orenstein & Koppel Ag | Vorrichtung zum Klassieren von staubfoermigen Schuettguetern |
DE3615494A1 (de) * | 1986-05-07 | 1987-11-12 | Omya Gmbh | Zentrifugalkraftsichter |
FR2609016B1 (fr) * | 1986-12-30 | 1989-12-01 | Cassese Antoine | Machine automatique verticale pour la coupe du verre |
DE3800843A1 (de) * | 1987-11-23 | 1989-06-01 | Kloeckner Humboldt Deutz Ag | Turbo-windsichter |
US4934900A (en) * | 1989-07-31 | 1990-06-19 | Fuller Company | Assembly forming a cylindrical cage of spaced apart vanes |
AT399865B (de) * | 1990-05-15 | 1995-08-25 | Lisec Peter | Verfahren und vorrichtung zum brechen von glasscheiben |
AT394987B (de) * | 1990-09-18 | 1992-08-10 | Lisec Peter | Vorrichtung zum sortieren von glastafelzuschnitten |
JP2792576B2 (ja) * | 1991-05-24 | 1998-09-03 | 宇部興産株式会社 | 竪型粉砕機 |
US5273163A (en) * | 1992-01-23 | 1993-12-28 | Luzenac America, Inc. | Centrifugal particle classifier having uniform influx distributor |
AT403687B (de) * | 1992-04-06 | 1998-04-27 | Lisec Peter | Verfahren und vorrichtung zum zerteilen von glastafeln in zuschnitte |
AT398302B (de) * | 1992-12-14 | 1994-11-25 | Lisec Peter | Vorrichtung zum lagern von tafel- oder plattenförmigen gegenständen |
US5301812A (en) * | 1993-04-02 | 1994-04-12 | Ecc International Inc. | Air classifying apparatus with wear reducing deflector |
ATA180793A (de) * | 1993-09-07 | 1994-12-15 | Thaler Horst Dipl Ing | Zentrifugalkraft-windsichter |
AT404681B (de) * | 1993-09-07 | 1999-01-25 | Thaler Horst Dipl Ing | Zentrifugalkraft-windsichter |
JP3388610B2 (ja) * | 1993-10-15 | 2003-03-24 | 株式会社日清製粉グループ本社 | 粉体分級機 |
-
1996
- 1996-07-08 AT AT0120596A patent/AT404234B/de not_active IP Right Cessation
-
1997
- 1997-06-25 CA CA002209145A patent/CA2209145C/en not_active Expired - Lifetime
- 1997-07-03 EP EP97890123A patent/EP0818249B1/de not_active Expired - Lifetime
- 1997-07-04 JP JP9180141A patent/JPH10128242A/ja active Pending
- 1997-07-08 CN CN97114084A patent/CN1176156A/zh active Pending
- 1997-07-08 US US08/889,577 patent/US5957299A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3677348B1 (de) | 2018-12-13 | 2023-09-06 | NETZSCH-Feinmahltechnik GmbH | Fliehkraftsichter mit speziellem sichterrad |
Also Published As
Publication number | Publication date |
---|---|
ATA120596A (de) | 1998-02-15 |
AT404234B (de) | 1998-09-25 |
US5957299A (en) | 1999-09-28 |
EP0818249A1 (de) | 1998-01-14 |
CA2209145C (en) | 2005-01-04 |
CN1176156A (zh) | 1998-03-18 |
JPH10128242A (ja) | 1998-05-19 |
CA2209145A1 (en) | 1998-01-08 |
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