EP0983802B1 - Sichtrad für einen Zentrifugalkraft-Windsichter - Google Patents

Sichtrad für einen Zentrifugalkraft-Windsichter Download PDF

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Publication number
EP0983802B1
EP0983802B1 EP99116466A EP99116466A EP0983802B1 EP 0983802 B1 EP0983802 B1 EP 0983802B1 EP 99116466 A EP99116466 A EP 99116466A EP 99116466 A EP99116466 A EP 99116466A EP 0983802 B1 EP0983802 B1 EP 0983802B1
Authority
EP
European Patent Office
Prior art keywords
blades
separating rotor
separating
baffles
flow
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
EP99116466A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0983802A3 (de
EP0983802A2 (de
Inventor
Stefano Dipl.-Ing.(Fh) Zampini
Marcus Dipl.-Ing.(Tu) Adam
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.)
Hosokawa Alpine AG
Original Assignee
Hosokawa Alpine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hosokawa Alpine AG filed Critical Hosokawa Alpine AG
Publication of EP0983802A2 publication Critical patent/EP0983802A2/de
Publication of EP0983802A3 publication Critical patent/EP0983802A3/de
Application granted granted Critical
Publication of EP0983802B1 publication Critical patent/EP0983802B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 centrifugal air classifier after The preamble of claim 1 and a method for the separation of in a fluid dispersed prepare for a fine and a coarse fraction according to the preamble of claim 11.
  • This Feinstsichter has a crusherrad with over the circumference rotationally symmetrically distributed slots arranged on the flow channels, whose width decreases stepwise approximately in the middle of the flow channels.
  • the slots have a larger at the outer periphery of the Feinstkorbsichters Length as on the inner circumference, and have either the shape of a trapezoid or that of a circle section bounded by two secants.
  • JP 07308637-A is a generic reformerrad with angled Flow channels known.
  • the sorterrad includes reformerradschaufeln with whose outer end angled arranged auxiliary blades, wherein the sorterradschaufeln and the auxiliary blades limit the flow channels.
  • auxiliary blades do not change the flow pattern in the Flow channels inflowing reformluft cause, since at the very edge of the reformerradschaufeln, so in the field of auxiliary blades, no vortex in the Visual air can form, as it lacks a stop surface on which the incoming classifying air which has been broken at the auxiliary blades, for formation a vortex could be reflected.
  • In the inflowing classifying air forms a vortex further inside the flow channel, in the area of the flow channels limiting classifier wheel blades.
  • classifiers serve to disperse them in a fluid Separate visual goods in a fine and a coarse fraction.
  • the fluid can vary depending on the procedural requirement a gaseous or vaporous or a liquid Be visual medium. Always have the desired fractions of the final product predefined conditions with regard to the particle size distribution of the respective Fulfill fractions.
  • the greatest demands are made put the fineness.
  • Centrifugal wind sifter with deflector wheel are one of the preferred classifiers for Production of very fine goods under relatively low visibility Energy expenditure. For a sharp separation of the visible material into fines and coarse material It is necessary that in all flow channels of Abweiserades a uniform flow with the same mean radial velocity of the Fluids takes place.
  • the separation limit for fine and coarse is namely over the radial extent the flow channels within the reformrades not constant. The highest, so The finest separation limit for the fine lies on the outer circumference of the deflector wheel and worsens with decreasing radius to the axis of rotation of the Deflection straight out. Normally, the coarse material is already on the outer circumference of the Rades rejected and gets into the coarse material. Only the fines can continue into the Penetrate interior of the deflector and is with the fluid flow in the fines deducted.
  • a first solution to achieve a uniform flow discloses DE 43 26 604 A1.
  • the flow of the Abweiserad inflowing Fluids with the visual material dispersed therein is outside the Flow channels of the deflector wheel evenly and gradually on the Circumferential speed of the Abweisrades accelerated.
  • an acceleration of the fluid flow enabling components extending from the peripheral area of the deflector wheel extend radially outward.
  • deflection wheels are not according to the prior art can be used to a uniform flow in the flow channels enable.
  • the object of the invention is therefore to make a Abweiserad so that a uniform flow in the interior of the flow channels is also realized when the speed of the outer circumference of the Abweiserades along flowing fluid (v ⁇ ) and the peripheral speed of the rotating Abweiserades (v s ) are not the same, that is, when there is a non-directional flow at the outer periphery of the deflector wheel.
  • the coronally arranged blades cause that the angular velocity of the flow fluid within the through Blades limited flow channel at any radial distance from the Rotation axis of the classifying wheel is constant.
  • the thereby adjusting Fest Eisenbel has the property that the separation limit on the outer circumference of bombarderrades is the smallest. The further the fluid together with the inside dispersed particles penetrates into the wheel interior, i. the smaller the radius becomes, the greater the separation limit becomes.
  • a cause that coarse particles undesirably penetrate into the reformerrad can be vortexes that form in the flow channels and coarse Aspirate particles and transport them to the inside of the classifier wheel.
  • the invention provides means that reduce vortex formation within the Flow channels influenced so that no or only a few coarse particles be sucked into the flow channels.
  • the flow channel flow breaker on the boundary walls of the Blades to be mounted so that the penetrating into the flow channels Fluid flow already broken in the first radial third of the flow channel and vortex formation only in this third of the flow channel can occur. Because the vortex is the cause of the suction of coarse particles are, coarse particles are not sucked so far into the flow channels, if the vortices are as close as possible to the outer circumference of the classifier wheel form. When the coarse particles penetrate less far into the classifier wheel can, then it is less burdened with coarse particles and the Probability that coarse particles penetrate into the interior and thus into the Fines can be greatly minimized.
  • Decisive for the shape and position of the internals is the desired detachment the inflowing fluid from the boundary surface of the classifier blades and the desired location of the vertebrae training.
  • the spatial design of the reformerrades and the classifier as well as the Properties of the product to be viewed may have a different optimal Location of the vortex and possibly a different size of the vortex as beneficial prove. In any case, an improvement will occur when the location of the Vortex occurs on a radius that is greater than the radius for the vortex, the would form if no internals are used.
  • classifier wheels according to the invention with internals are preferred in classifiers used, which work with undirected Fluidzströmströmung.
  • When using the Inventive wheels according to the invention can be directed to a pre-acceleration of the Classifier fluids are dispensed with.
  • the internals can be used in classifier wheels whose Clearance paddles optionally to the radial direction straight, oblique or angled are arranged running.
  • the axial height of the classifier wheel should be be as large as possible.
  • the equal distribution of Radial speeds is exceeded by an over the axial reformerrad Abu reached different radial blade depth.
  • the blade depth is in axial Direction from the circular wheel bearing the treatradnabe towards the annular Cover disc smaller.
  • the different blade depth over the axial reformerrad Abu causes a uniform suction of the flow fluid and thus a uniform Radial velocity of the fluid over the axial height.
  • the separator wheels this new type, the reformerrad Abu can be increased without increasing the visual quality deteriorate.
  • the design of classifying wheels with different blade depths can also in classifying wheels without internals to equalize the Radial speed can be used.
  • the crusherrad of Fig. 1 consists of a crusherradnabe (1) bearing Circular disc (2), which has radial and annular slots, in the the crusherradschaufeln (3) can be used.
  • the evenly over the circumference of the Classifier wheel distributed blades (3) are through the circular disc (2) and the annular cover plate (4) held.
  • both Circular disc (2) and annular cover plate (4) and the blades (3) made Made of steel.
  • the blades (3) are fixed by soldering or welding with the Circle (2) - and cover plate (4) connected.
  • classifier blades (3) chosen, the one from another and not weld or solderable material, e.g. ceramic or plastic, like that
  • the blades (3) can be made by gluing in the slots of the circle (2) - and cover plate (4) are attached.
  • Connection techniques possible. Depending on the material and application may be to prove another lanyard as the most meaningful.
  • the sortifierradschaufeln (3) and circle (2) - and cover plate (4) to glue.
  • each sifter bucket (3) On the front boundary surface in the direction of rotation, each sifter bucket (3) the internals (5) are attached.
  • the internals (5) have, for example, a square cross section and extend axially over the entire Blade height. You can e.g. by welding, soldering or gluing with the Boundary surfaces of sorterrradschaufeln (3) are connected.
  • the internals are preferably located on a common radial Circular orbit, which is approximately in an area within the outer third of the radial Total width of reformerradschaufeln (3) is located.
  • the separator wheel shown in FIG. 2 differs from that in FIG. 1 shown digesterrad by the arrangement of sorterradschaufeln (3).
  • the reformerradschaufeln (3) do not run exactly in the radial direction, but are in rotated at an angle to the radial direction opposite to the direction of rotation arranged. If the sorterradschaufeln (3) close to the Extend axis of rotation, the reformerradschaufeln (3) remain in the inner region radially aligned, where, however, the sorterradschaufeln (3) in the outer region are arranged rotated to the radial direction at an angle. The reformerradschaufeln (3) thereby form a flow channel with a kinked course.
  • the internals can, depending on the application, various cross-sections exhibit.
  • the internals to the sorterradschaufeln (3) according to FIG. 3 no square cross section, but consist essentially only of a stepped shoulder (6), which in an advantageous embodiment already in the reformerradschaufel (3) is integrated and not in addition to the sorterradschaufeln (3) must be connected.
  • the blades (3) on their inner ends (7) are bevelled. Thereby remain very large even when using many and in their thickness dimensioned blades (3) get sufficiently large flow channels.
  • the crusherradschaufeln are made two sections formed.
  • the radially inner sections run thereby straight in the radial direction.
  • the radially outer sections are according to Fig. 4 arranged obliquely. At the kink between the oblique and straight Blade sections project beyond the outer end of the inner section Kink point and thereby forms the flow edge according to the invention.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Centrifugal Separators (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Cyclones (AREA)
EP99116466A 1998-09-04 1999-08-21 Sichtrad für einen Zentrifugalkraft-Windsichter Expired - Lifetime EP0983802B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19840344A DE19840344C2 (de) 1998-09-04 1998-09-04 Sichtrad für einen Zentrifugalkraft-Windsichter
DE19840344 1998-09-04

Publications (3)

Publication Number Publication Date
EP0983802A2 EP0983802A2 (de) 2000-03-08
EP0983802A3 EP0983802A3 (de) 2000-07-19
EP0983802B1 true EP0983802B1 (de) 2005-08-03

Family

ID=7879798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99116466A Expired - Lifetime EP0983802B1 (de) 1998-09-04 1999-08-21 Sichtrad für einen Zentrifugalkraft-Windsichter

Country Status (6)

Country Link
EP (1) EP0983802B1 (ja)
JP (1) JP4763111B2 (ja)
CN (1) CN1103253C (ja)
AT (1) ATE301007T1 (ja)
DE (2) DE19840344C2 (ja)
ES (1) ES2245064T3 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002126650A (ja) * 2000-10-30 2002-05-08 Toshiba Tungaloy Co Ltd 分級ロータ
CN100591405C (zh) * 2008-05-04 2010-02-24 胡端志 动态物理屏蔽净化器、制作方法及专用夹具
DE102015220269A1 (de) * 2015-10-19 2017-04-20 Thyssenkrupp Ag Sichteinrichtung zum Sichten eines Materialstroms
DE102016015051B4 (de) 2016-12-16 2019-01-31 Hosokawa Alpine Aktiengesellschaft Sichtrad für einen Zentrifugalkraft-Windsichter
DE102018008127B4 (de) 2018-10-13 2022-06-09 Hosokawa Alpine Aktiengesellschaft Blaskopf und Verfahren zur Herstellung einer Mehrschichtschlauchfolie
DE102018009632B4 (de) 2018-12-11 2021-12-09 Hosokawa Alpine Aktiengesellschaft Vorrichtung zum Aufwickeln und Wickelwechsel von bahnförmigem Material und ein Verfahren dafür
EP3782739A1 (en) 2019-08-22 2021-02-24 Basf Se A component for use as rotary body
EP3849714B1 (de) 2019-11-22 2023-08-23 Gebr. Pfeiffer SE Sichtrad mit segelflächenelementen und verfahren zum sichten mit einem solchen sichtrad
DE102020006008B3 (de) 2020-10-01 2022-03-31 Hosokawa Alpine Aktiengesellschaft Fließbettgegenstrahlmühle zur Erzeugung feinster Partikel aus Aufgabegut geringer Schüttdichte und Verfahren dafür
DE102021001239B4 (de) 2021-03-09 2024-03-21 Hosokawa Alpine Aktiengesellschaft Vorrichtung und Verfahren zur Sichtung von staubförmigen Gütern
DE102021001238B4 (de) 2021-03-09 2023-01-26 Hosokawa Alpine Aktiengesellschaft Zentrifugalkraft-Windsichter und Verfahren zur Sichtung von staubförmigen Gütern
DE102021001237B4 (de) 2021-03-09 2023-02-09 Hosokawa Alpine Aktiengesellschaft Vorrichtung und Verfahren zur Sichtung von staubförmigen Gütern
DE102021001240B4 (de) 2021-03-09 2023-05-11 Hosokawa Alpine Aktiengesellschaft Vorrichtung und Verfahren zur Sichtung von staubförmigen Gütern

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089595A (en) * 1960-08-06 1963-05-14 Alpine Ag Maschinenfabrik Und Flow apparatus for separating granular particles
JPH0226682A (ja) * 1988-07-18 1990-01-29 Babcock Hitachi Kk 粉砕分級装置
DD299949A5 (de) * 1989-12-15 1992-05-14 Freiberg Bergakademie Feinstsichter und verfahren zu dessen herstellung
DE4140656C1 (ja) * 1991-12-10 1992-09-10 Alpine Ag, 8900 Augsburg, De
DE4326604C2 (de) * 1993-08-07 2003-02-27 Hosokawa Alpine Ag & Co Klassiervorrichtung
JPH07308637A (ja) * 1994-05-20 1995-11-28 Ishikawajima Harima Heavy Ind Co Ltd ミルの回転式分級機
JP3207702B2 (ja) * 1995-04-04 2001-09-10 三菱重工業株式会社 ローラミル用回転式分級機
DE19513745A1 (de) * 1995-04-11 1996-10-17 Hosokawa Mikropul Ges Fuer Mah Klassierer

Also Published As

Publication number Publication date
DE19840344C2 (de) 2002-04-04
EP0983802A3 (de) 2000-07-19
CN1248498A (zh) 2000-03-29
JP2000084490A (ja) 2000-03-28
DE59912352D1 (de) 2005-09-08
ATE301007T1 (de) 2005-08-15
ES2245064T3 (es) 2005-12-16
EP0983802A2 (de) 2000-03-08
DE19840344A1 (de) 2000-05-04
JP4763111B2 (ja) 2011-08-31
CN1103253C (zh) 2003-03-19

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