EP1025915B1 - Sichterradschaufeln für Zentrifugalkraftsichter - Google Patents
Sichterradschaufeln für Zentrifugalkraftsichter Download PDFInfo
- Publication number
- EP1025915B1 EP1025915B1 EP00101197A EP00101197A EP1025915B1 EP 1025915 B1 EP1025915 B1 EP 1025915B1 EP 00101197 A EP00101197 A EP 00101197A EP 00101197 A EP00101197 A EP 00101197A EP 1025915 B1 EP1025915 B1 EP 1025915B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- classifying wheel
- elements
- accordance
- ceramic
- centrifugal
- 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
- 239000000919 ceramic Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 17
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- 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 the reformerradschaufeln a centrifugal separator wheel for air classifiers, in particular on reformerradschaufeln, the off consist of ceramic or similar brittle materials.
- Such air classifiers have a rotating crusherrad that against his Centrifugal direction is traversed by the classifying air from outside to inside and whose reformerradschaufeln are arranged in a ring and parallel to Run axis of rotation, wherein the ends of the sorterradschaufeln in Recesses of opposite end boundaries concentric with sorterradnabe are used.
- Air separators according to this prior art are the reformerradschaufeln in opposite end limits used by a over the entire reformerradiere extending, torsionally stiff sorterradnabe connected and the classifier blades are on the outer circumference of the so formed Base body fixed in their mutual position and are used detachably.
- the Classifying wheels have no shoulders on their lateral surfaces. At a Largely flat lateral surface no reformgut can begin on the reformerrad. By avoiding corners and edges in the area of the lateral surface improves the wear behavior, especially in the sighting of strong abrasive goods.
- sighting wheels off All-ceramic, classifying wheels with ceramic blades or with ceramic coating used.
- disc wheels which are integrally made of ceramic are produced and preferred for small sizes (diameter about 50 to 100 mm) are used. Sight wheels for larger sizes (diameter over 100 mm) are preferably produced according to patent DE 196 13 902 C2, this especially due to the easy interchangeability of individual Classifying wheel vanes. This will be a cost effective repair of worn withdrawerrädem possible because not the complete reformerrad must be replaced, but only a few worn Classifier blades are to be replaced.
- the classifier blades are made of brittle material, e.g. ceramics
- such recesses are disadvantageous because they due to the form stepped notches that cause stress concentrations and It can crack, leading to breakage and thus destruction of the Classifier blades guide.
- the line, which is due to the recesses on the two outer ends of the Classifier wheel blades result in and in the inner corners of the recess, over the Thickness of the blades runs is the notch baseline
- the object of the invention is therefore to provide admirably constructed, despite Recesses no stress concentrations in the brittle material cause the breakage and thus the destruction of the classifier blades being able to lead.
- a preferred and inexpensive to manufacture basic form of the elements Brittle material is the cuboid shape.
- a ceramic material alumina, tungsten carbide, Sintered corundum or any other ceramic can be used.
- each axial end of the ceramic cuboid is a smaller cuboid attached.
- the attachment is done in a simple manner by gluing, in particular with a self-curing, or thermosetting epoxy adhesive. It but can also be used other joining agents, so in the Connection of ceramic blocks with cuboids made of ductile material such as e.g. Steel containing elements e.g. be connected by ultrasonic welding.
- the finished product must not contain any particles which may be present in the finished product made of iron or steel materials. To ensure this, no Iron or steel parts exposed to the product flow.
- the cuboids can also be used to fix and fasten the classifier blades be made of ceramic material.
- the cuboid end elements can be flush either on one side surface complete with the sifter blade or centered on the ceramic Classifier wheel bucket attached.
- the parting line does not necessarily have to be radial to the axis of rotation of the reformerrades run, but can in any other desired direction run. In one variation, the parting line runs in the axial direction to the axis of rotation of the classifier wheel.
- the cuboid withdrawerradschaufel is with its narrow longitudinal side with a rod-shaped support element connected. To enable a reversibility, the rod-shaped Carrier element be arranged centrally and on the two narrow longitudinal sides be provided with cuboidal elements, each having the outer edge of the so Make formed classifier wheel scoop.
- the cuboid sorterradschaufel 1 is formed of ceramic material. At the two axial ends of the reformerradschaufel 1 each a cuboidal element 2 and 3 are added from steel material.
- the parting lines 8 and 9 extend through the notch baseline 4 and 5 and in the direction of the blade width.
- the joints 8 and 9 are filled with thermosetting epoxy resin.
- holes 6 and 7 are mounted, which are made different depths in their drilling depths according to the weight distribution.
- the cuboidal elements 22 and 23 are also made of steel material and mounted centrally on the reformerradschaufel 21 .
- the joints 24 and 25 are filled with thermosetting epoxy resin.
- holes 26 and 27 are mounted, which are made different depths in their drilling depths according to the weight distribution.
- a ceramic support member 31 is rod-shaped and extends over the entire blade height.
- a ceramic rod-shaped outer edge 32 is added on the narrow longitudinal side of the support member 31 .
- the parting line 33 runs there in the direction of the longitudinal extension of the reformerradschaufel. This longitudinal extent runs parallel to the rotation axis of the sifter rotor.
- FIG. 4 shows a variant of FIG. 3 , which, in addition to the rod-shaped, ceramic carrier element 41 with outer edge 42 attached via the parting line 44 , additionally has a further outer edge 43 which, via the parting line 45 , has the rod-shaped, ceramic carrier element 41 connected is.
- the rod-shaped support member 51 is made of a steel material and assembled via the parting line 53 with the outer edge 52 of ceramic material.
- the parting lines 64 and 65 connect the ceramic or steel members 62 and 63 to the ceramic classifier blade 61.
- the parting lines 64 and 65 are along the preferred cracking direction that would result if the classifier blade formed in this way were formed integrally ,
- Fig. 7 is a cross section of a classifier wheel according to the prior art is shown, in which the sorterradschaufel invention are used.
- the reformerrad forms a base body 71 in the reformerradschaufeln 74 and 75 are used.
- the reformerradschaufeln 74 and 75 are fixed at their axial ends by Endbegrenzungen 72 and 73 axially and radially in the base 71 .
- the reformerradschaufeln 74 according to the prior art are integrally formed.
- the sorterradschaufeln 75 according to the invention are formed of a plurality of elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Means For Separation Of Solids (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Centrifugal Separators (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Ceramic Products (AREA)
Description
Claims (8)
- Zentrifugalkraft-Sichterrrad mit Sichterradschaufeln 1 aus sprödem Werkstoff, insbesondere aus Keramik dadurch gekennzeichnet, daß die Sichterradschaufeln 1 aus mehreren Elementen 1, 2, 3 geometrischer Grundform gebildet werden und derart zusammengefügt sind, daß mindestens eine Ebene der Trennfugen 8, 9 zweier benachbarter Elemente durch die Kerbgrundlinie 4, 5 verläuft.
- Zentrifugalkraft-Sichterrrad nach Anspruch 1, dadurch gekennzeichnet, daß die Sichterradschaufeln 1 aus quaderförmigen Grundelementen 1, 2, 3 gebildet werden.
- Zentrifugalkraft-Sichterrrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Elemente aus sprödem Werkstoff mit Elementen aus duktilem Werkstoff kombiniert werden.
- Zentrifugalkraft-Sichterrrad nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Sichterradschaufeln 1 aus einem mittleren Element 1 spröden Werkstoffs und zwei Elementen 2,3 duktilen Werkstoffs an den beiden axialen Enden des mittleren Elements 1 gebildet werden.
- Zentrifugalkraft-Sichterrrad nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Elemente 1, 2, 3 verklebt sind.
- Zentrifugalkraft-Sichterrrad nach Anspruch 5, dadurch gekennzeichnet, daß der Klebstoff ein wärmeaushärtender Epoxydharzkleber ist.
- Zentrifugalkraft-Sichterrrad nach Anspruch 3, dadurch gekennzeichnet, daß die Elemente 2, 3 duktilen Werkstoffs mit den Elementen 1 spröden Werkstoffs durch Ultraschallschweißen verbunden sind.
- Zentrifugalkraft-Sichterrrad nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die Sichterradschaufeln 1 eine zur axial verlaufenden Mittellinie spiegelsymetrische Form aufweisen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19903948 | 1999-02-02 | ||
| DE19903948A DE19903948C2 (de) | 1999-02-02 | 1999-02-02 | Zentrifugalkraft-Sichterrad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1025915A1 EP1025915A1 (de) | 2000-08-09 |
| EP1025915B1 true EP1025915B1 (de) | 2005-03-02 |
Family
ID=7896047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00101197A Expired - Lifetime EP1025915B1 (de) | 1999-02-02 | 2000-01-22 | Sichterradschaufeln für Zentrifugalkraftsichter |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1025915B1 (de) |
| AT (1) | ATE289878T1 (de) |
| DE (2) | DE19903948C2 (de) |
| ES (1) | ES2238211T3 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007098778A1 (de) * | 2006-02-24 | 2007-09-07 | Vitrabio Gmbh | Verfahren zur herstellung eines porösen glases und glaspulvers und glaswerkstoff zum ausführen des verfahrens |
| DE102023124410B3 (de) * | 2023-09-11 | 2024-12-24 | Netzsch-Feinmahltechnik Gmbh | Sichterrad mit zu zwecken des verschleissschutzes hybriden sichterradschaufeln |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3508889C1 (de) * | 1985-03-13 | 1992-02-20 | Alpine Ag, 8900 Augsburg | Windsichter mit verschleissfreiem Sichtrad |
| DE4140656C1 (de) * | 1991-12-10 | 1992-09-10 | Alpine Ag, 8900 Augsburg, De | |
| DE19613902C2 (de) * | 1996-04-06 | 1998-08-06 | Hosokawa Alpine Ag | Windsichter mit steifem Sichterradgrundkörper |
| DE19613876C2 (de) * | 1996-04-06 | 1998-08-06 | Hosokawa Alpine Ag | Windsichter mit austauschbarem Schaufelkorb |
-
1999
- 1999-02-02 DE DE19903948A patent/DE19903948C2/de not_active Expired - Fee Related
-
2000
- 2000-01-22 DE DE50009612T patent/DE50009612D1/de not_active Expired - Lifetime
- 2000-01-22 ES ES00101197T patent/ES2238211T3/es not_active Expired - Lifetime
- 2000-01-22 EP EP00101197A patent/EP1025915B1/de not_active Expired - Lifetime
- 2000-01-22 AT AT00101197T patent/ATE289878T1/de active
Also Published As
| Publication number | Publication date |
|---|---|
| ES2238211T3 (es) | 2005-09-01 |
| DE50009612D1 (de) | 2005-04-07 |
| ATE289878T1 (de) | 2005-03-15 |
| EP1025915A1 (de) | 2000-08-09 |
| DE19903948A1 (de) | 2000-08-10 |
| DE19903948C2 (de) | 2002-07-18 |
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