DK141478B - Nebulizer wheels for slurry spraying. - Google Patents
Nebulizer wheels for slurry spraying. Download PDFInfo
- Publication number
- DK141478B DK141478B DK652173AA DK652173A DK141478B DK 141478 B DK141478 B DK 141478B DK 652173A A DK652173A A DK 652173AA DK 652173 A DK652173 A DK 652173A DK 141478 B DK141478 B DK 141478B
- Authority
- DK
- Denmark
- Prior art keywords
- wheel
- carriers
- wear
- nebulizer
- hub
- Prior art date
Links
- 239000006199 nebulizer Substances 0.000 title claims description 16
- 239000002002 slurry Substances 0.000 title claims description 14
- 238000005507 spraying Methods 0.000 title description 3
- 239000000969 carrier Substances 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011344 liquid material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 235000019687 Lamb Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 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
- 238000004873 anchoring Methods 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000002663 nebulization Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
- B05B3/1021—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with individual passages at its periphery
- B05B3/1028—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with individual passages at its periphery the passages comprising an insert
Landscapes
- Nozzles (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
- Treatment Of Sludge (AREA)
Description
<U) FREMLÆBeElSESBKRIFT 141478 DANMARK ,s” lntα* bb Si S 3/I0 «(21) Ansøgning nr. 6521/73 (22) Indleveret den 3· deC* 1973 (23) Løbedag 3· deC. 1975 (44) Ansøgningen fremlagt og >0 fremlæggelsesskriftet offentliggjort dan 24. mar . 1 you DIREKTORATET FOR . .<U) EMPLOYMENT LETTER 141478 DENMARK, "lntα * bb Si S 3 / I0" (21) Application No. 6521/73 (22) Filed on 3 · deC * 1973 (23) Race day 3 · deC. 1975 (44) The application submitted and> 0 petition published on 24 March. 1 you DIRECTORATE FOR. .
PATENT-OG VAREMÆRKEVÆSENET (30) Prioritet begæret fra dan 18. dec. 1972, 58419/72,-GB (71) A/s NIRO ATOMIZER, Gladsaxevej 305, Søborg, DK.PATENT AND TRADEMARKETS (30) Priority requested from dan 18 dec. 1972, 58419/72, -GB (71) A / s NIRO ATOMIZER, Gladsaxevej 305, Søborg, DK.
(72) Opfinder: Orla Straarup, Suomisvej 1, København V, DK: Paul Otto Guent= her Helmlch, Tvedagervej 3, Ny Har løse, Hillerød, DK.(72) Inventor: Orla Straarup, Suomisvej 1, Copenhagen V, DK: Paul Otto Guent = here Helmlch, Tvedagervej 3, New Har loose, Hillerød, DK.
(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:
Internationalt Patent-Bureau.International Patent Office.
(64) Forstøverhjul til forstøvning af ops 1 earning er.(64) Atomizer wheel for atomizing ops 1 earning is.
Opfindelsen angår et forstøverhjul til forstøvning af opslemninger, æd et centralt nav og et hermed koncentrisk, ringformet, skålformet rum, i hvis hovedea-r gelig cylindriske sidevæg der er udformet et antal udslyngningsåbninger foret med slidfaste bøsninger, som rager et stykke inden for sidevæggens inderside.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a nebulizer wheel for atomizing slurries, having a central hub and a concentric annular cup-shaped compartment, in the main cylindrical sidewall of which a plurality of flush openings are provided with wear-resistant bushings projecting a portion within the interior of the sidewall. .
Forstøverhjul af denne art anvendes til forstøvning af stærkt slidenderne*· terialer som f.eks. cementrå'slam eller opslemninger af ler eller malm, idet hensigten med at forsyne udslyngningsåbningerne, der er fordelt i en eller flere rækker i hjulets akseretning, med bøsninger af slidfast, sædvanligvis sintret materiale, der f.eks. kan være aluminiumoxid, wolframcarbid eller silicl-umcarbid, og lade disse bøsninger rage et stykke inden for indersiden af hjulets ydervæg er at frembringe en aflejring af dispergerét materiale omkring disse bøsninger og herigennem beskytte væggen, især omkring udslyngningsåbningema, mod slid.Nebulizer wheels of this kind are used for nebulizing the highly abrasive ends * materials such as cement raw sludge or clay or ore slurries, the intention being to provide the discharge openings distributed in one or more rows in the axial direction of the wheel with bushings of abrasion-resistant, usually sintered material, e.g. may be aluminum oxide, tungsten carbide or silicon carbide, and letting these bushings extend within the inside of the outer wall of the wheel is to provide a deposit of dispersed material around these bushes, thereby protecting the wall, especially around the ejection opening, against wear.
Udslyngningen af opslenmingen gennem udslyngningsåbningeme foregår som føl- 2 141478 ge af trykket i det roterende lag af flydende opslemning, og man skulle derfor forvente at kapaciteten af et sådant hjul i hovedsagen er bestemt ved dette lags tykkelse, således at en kapacitetsforøgelse kan opnås ved forøgelse af hjulets diameter. Dette har imidlertid vist sig kun at gælde indtil en vis grænse, idet det eksempelvis for et givet hjul med 24 udslyngningsåbninger fordelt i to rækker med 12 åbninger i hver, ved en omdrejningshastighed på 6000 omdr/min har vist sig, at en gradvis forøgelse af hjulets diameter fra f.eks. 190 til 240 mm vil medføre 3 en gradvis kapacitetsforøgelse op til omkring 32,4 m pr. time, hvorimod en yderligere diameterforøgelse til 280 mm i stedet for at medføre en yderligere kapaci- 3 tetsforøgelse vil føre til et fald i kapaciteten til omkring 24 m pr. time.The discharge of the slurry through the discharge openings takes place as a result of the pressure in the rotating layer of liquid slurry, and it is therefore to be expected that the capacity of such a wheel is substantially determined by the thickness of this layer so that a capacity increase can be obtained by increasing it. of the diameter of the wheel. However, this has been shown to apply only to a certain limit, for example, for a given wheel with 24 ejection openings distributed in two rows with 12 openings in each, at a speed of 6000 rpm, it has been found that a gradual increase of the diameter of the wheel from e.g. 190 to 240 mm will result in a gradual increase in capacity up to about 32.4 m per meter. whereas an additional diameter increase to 280 mm instead of causing a further increase in capacity will lead to a decrease in capacity to about 24 m per hour. hour.
Arsagen hertil må søges i det forhold, at friktionen mellem hjulet og det flydende materiale er utilstrækkelig til at give laget af flydende materiale en omdrejningshastighed svarende til hjulets, hvilket medfører en reduktion i centrifugalkraften.The reason for this must be sought in the fact that the friction between the wheel and the liquid material is insufficient to give the layer of liquid material a speed of rotation similar to that of the wheel, which results in a reduction in centrifugal force.
Fra forstøverhjul til forstøvning af opløsninger eller opslemninger af materiale, der ikke specielt er stærkt slidende, f.eks. mælk, er det kendt at søge omdrejningshastigheden for laget af flydende materiale forøget ved at forsyne hjulets bund med ribber eller skovlblade. Anvendelsen af ribber har imidlertid vist sig at have ingen eller kun ringe virkning, og anvendelsen af såvel ribber som skovlblade vil være ganske uegnet ved forstøvning af stærkt slidende materialer, fordi der vil optræde et så kraftigt slid på ribbernes eller skovlbladenes forside, at hjulet hurtigt ødelægges.From atomizer wheels to atomizing solutions or slurries of material that is not particularly strongly abrasive, e.g. milk, it is known to seek the speed of rotation of the layer of liquid material increased by providing the bottom of the wheel with ribs or paddle blades. However, the use of ribs has been found to have little or no effect, and the use of both ribs and paddle blades will be quite unsuitable for atomizing highly abrasive materials because there will be such a severe wear on the front of the ribs or paddle blades that the wheel quickly destroyed.
Ved forstøvning af opslemninger af stærkt slidende materialer er det foreslået at forsyne hjulet med en cirkulær dækplade og fastgøre et antal cylindriske legemer af slidfast, sintret materiale mellem denne dækplade og hjulets bund. Selv om disse cylindriske legemer har vist sig i stand til at modstå slid og kan have en forholdsvis lang levetid, har det imidlertid vist sig, at der ved grænserne for de cylindriske legemers berøringsflader med henholdsvis dækpladen og hjulets bund optræder et kraftigt slid, som kan føre til hurtig ødelæggelse af hjulet.When spraying slurries of highly abrasive materials, it is proposed to provide the wheel with a circular cover plate and attach a plurality of cylindrical bodies of abrasion-resistant, sintered material between this cover plate and the wheel bottom. However, although these cylindrical bodies have been able to withstand wear and can have a relatively long life, it has been found that at the boundaries of the contact surfaces of the cylindrical bodies with the cover plate and the bottom of the wheel there is a strong wear which can lead to rapid destruction of the wheel.
Ved opfindelsen tilsigtes det at frembringe et forstøverhjul af den omhandlede art til forstøvning af stærkt slidende materialer med en væsentligt forøget kapacitet i forhold til kendte forstøverhjul til dette formål, men uden ulemperne med hensyn til nedsat levetid ved de ovennævnte kendte foranstaltninger.It is an object of the present invention to provide a nebulizer wheel of the present type for nebulization of highly abrasive materials with a substantially increased capacity over known nebulizer wheels for this purpose, but without the disadvantages of reduced life by the above-mentioned known measures.
Ifølge opfindelsen er et forstøverhjul af den omhandlede art ejendommeligt ved, at der i det skålformede rum er anbragt medbringere af slidfast materiale, hvilke medbringere har deres ene ende beliggende i området mellem sidevæggen og de mod hjulets nav vendende ender af de slidfaste bøsninger.According to the invention, a nebulizer wheel of the kind according to the invention is characterized in that in the bowl-shaped compartment are mounted wear-resistant material which has one end located in the area between the side wall and the ends of the wheel facing the hub-resistant bushings.
Ved'blidfast materiale" forstås i denne forbindelse f.eks. sintrede materialer som aluminiumoxid, wolframcarbid og siliciumcarbid eller et ikke-sintret materiale som titancarbid.In this context, "antiseptic" means, for example, sintered materials such as alumina, tungsten carbide and silicon carbide, or a non-sintered material such as titanium carbide.
3 1414783 141478
Ved praktiske forsøg med forstøverhjul udformet i overensstemmeIse med opfindelsen har det for et hjul med ovennævnte diameter på 280 mm og 24 udslyngnings-åbninger vist sig, at der, hvis hveranden af disse åbninger lukkes med en prop der benyttes til fastgørelse af radialt rettede »edbringere, i stedet for et fald 3 i kapaciteten til omkring 24 m pr. timer opnås en kapacitetsforøgelse til mere 3 end 70 m pr. time til trods for at antallet af i brug værende udslyngningsåbninger er halveret.In practical tests with nebulizer wheels designed in accordance with the invention, for a wheel of the above diameter of 280 mm and 24 ejection openings, it has been found that if each of these openings is closed with a plug used for fixing radially directed edibles , instead of a 3 drop in capacity to about 24 meters per second. hours a capacity increase to more than 70 m per hour is achieved. even though the number of inlet openings in use is halved.
Som følge af at den fra hjulets nav fjerneste ende af de nævnte medbringe-re, hvad enten de er fastgjort til navet eller til hjulets ydervæg, er beliggende i det område ved sidevæggen, hvor der som følge af de indragende kanter af de slidfaste bøsninger dannes et lag af dispergeret materiale, opnås der en effektiv beskyttelse af de pågældende ender af medbringeme og de omkring disse liggende områder af ydervæggen, således at der udover kapacitetsforøgelsen opnås en væsentligt længere levetid end ved anvendelse af de kendte forslag til forøgelse af op-slemningens omdrejningshastighed.Due to the fact that the farthest end of the said hubs, whether attached to the hub or to the outer wall of the wheel, is located in the area at the side wall where, as a result of the projecting edges of the wear-resistant bushings, a layer of dispersed material, effective protection of the respective ends of the carriers and the surrounding areas of the outer wall is achieved, so that, in addition to the capacity increase, a significantly longer service life is obtained than using the known proposals for increasing the speed of slurry. .
Samtidigt opnås ved opfindelsen en effektiv nedsættelse af sliddet på de indragende kanter af de slidfaste bøsninger i udslyngningsåbningerne.At the same time, the invention provides an effective reduction of the wear on the projecting edges of the wear-resistant bushes in the discharge openings.
Opfindelsen forklares i det følgende nærmere under henvisning til tegningen, hvor fig. 1 viser et aksialsnit gennem en udførelsesform for et forstøverhjul ifølge opfindelsen, fig. 2 et snit efter linien II-II i fig. 1, fig. 3 en modifikation af en del af den i fig. 1 viste udførelsesform, fig. 4 en anden modifikation af den i fig. 1 viste udførelsesform, fig. 5 et snit efter linien V-V i fig. 4, fig. 6 et aksialsnit af en anden udførelsesform for forstøverhjulet ifølge opfindelsen, fig. 7 et aksialsnit af en yderligere udførelsesform, og fig. 8 et snit efter et radialplan af endnu en udførelsesform.The invention will now be explained in more detail with reference to the drawing, in which 1 shows an axial section through an embodiment of an atomizer wheel according to the invention; FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a modification of part of the embodiment shown in FIG. 1; FIG. 4 shows another modification of the embodiment shown in FIG. 1; FIG. 5 is a section along the line V-V in FIG. 4, FIG. 6 is an axial section of another embodiment of the atomizer wheel according to the invention; FIG. 7 is an axial sectional view of a further embodiment; and FIG. 8 is a sectional view of a radial plane of yet another embodiment.
Det i fig. 1 og 2 viste forstøverhjul omfatter en bund 1 med et centralt nav 2, en cylindrisk sidevæg 3 og en dækplade 4. Hjulet er på kendt måde fastgjort på en drivaksel 6.The FIG. 1 and 2, atomizer wheels comprise a bottom 1 with a central hub 2, a cylindrical side wall 3 and a cover plate 4. The wheel is fixed in a known manner to a drive shaft 6.
I dækpladen 4 findes en central udboring, hvorigennem drivakslen 6 er ført på en sådan måde, at der mellem akslen og dækpladen 4 dannes en ringformet åbning 7, hvorigennem det dispergerede materiale,som skal forstøves, kan indføres i hjulets indre på ikke nærmere vist måde.In the cover plate 4 there is a central bore through which the drive shaft 6 is guided in such a way that an annular opening 7 is formed between the shaft and the cover plate 4, through which the dispersed material to be atomized can be introduced into the interior of the wheel in a manner not shown. .
I hjulets sidevæg 3 er der udformet et antal udslyngningsåbninger, som er foret med slidfaste bøsninger af sintret materiale, hvoraf kun én bøsning er vist ved 8. Hver bøsning kan som vist være indsat i en muffe 9.In the sidewall 3 of the wheel, a plurality of discharge openings are provided which are lined with wear resistant bushings of sintered material, of which only one bushing is shown at 8. Each bushing may, as shown, be inserted into a sleeve 9.
For de øvrige udslyngningsåbninger er kun åbningernes beliggenhed antydet 4 141478 på tegningen, i fig. 1 ved angivelse af skæringspunkterne 10 mellem udslyngnings-åbningernes akser og indersiden af den cylindriske sidevæg 3 og i fig. 2 ved antydning af åbningernes akser ved radiale linier 11*For the other discharge openings, only the location of the openings is indicated in the drawing, in fig. 1 by indicating the intersection points 10 between the axes of the projection openings and the inside of the cylindrical sidewall 3 and in FIG. 2 by indicating the axes of the openings by radial lines 11 *
Som det ses i fig. 1 og 2 rager den inderste ende af hver bøsning 8 et stykke inden for indersiden af hjulets cylindriske sidevæg 3.As seen in FIG. 1 and 2, the inner end of each sleeve 8 projects a distance within the inner side of the cylindrical side wall 3.
I overensstemmelse med opfindelsen er der i forstøverhjulets indre mellem udslyngningsåbningerne anbragt medbringere 12 på en sådan måde, at disse medbringere har deres fra hjulets nav bortvendende ender beliggende i det område mellem indersiden af sidevæggen 3 og de nævnte indadvendende ender af bøsningerne 8, hvor der under hjulets drift opbygges et lag af dispergeret materiale.In accordance with the invention, in the interior of the nebulizer wheel between the projection openings are provided carriers 12 in such a way that these carriers have their ends facing away from the wheel hub located in the area between the inside of the side wall 3 and the said inward ends of the bushings 8, where the operation of the wheel builds up a layer of dispersed material.
1 udførelsesformen i fig. 1 og 2 findes der tolv sådanne medbringere som er radialt orienterede vinkelret på forstøverhjulets akse, og hvoraf der i fig. 1 kun er vist én og i fig. 2 kun to medbringere, som er betegnet med 12. Beliggenheden af de øvrige medbringere er i fig. 1 angivet ved skæringspunkterne 13 mellem de radialt rettede medbringeres akser og indersiden af sidevæggen 3 og i fig. 2 ved radiale linier 14, der angiver medbringernes akser. Også medbringerne er jævnt fordelt i to rækker med seks medbringere i hver. I udførelsesformen i fig.1 shows the embodiment of FIG. 1 and 2 there are twelve such carriers which are radially oriented perpendicular to the axis of the nebulizer wheel and of which in FIG. 1 is shown only one and in FIG. 2 shows only two carriers designated by 12. The position of the other carriers is in FIG. 1, indicated by the intersection points 13 between the axes of the radially directed carriers and the inside of the side wall 3 and in FIG. 2 at radial lines 14 indicating the axes of the carriers. Also the carriers are evenly distributed in two rows with six carriers in each. In the embodiment of FIG.
1 og 2 er medbringerne 12 fastgjort til sidevæggen 3 ved hjælp af tappe 15, som er monteret i huller i sidevæggen og fastgjort til denne ved hjælp af en udragende krave 15', og som endvidere passer i hertil udformede aksiale boringer i medbringerne 12. Som det vil fremgå af det følgende kan fastgørelsen af medbringerne ske på anden måde, idet der dog ved fastgørelsen må tages hensyn til, at det sintrede materiale, hvoraf medbringerne 12 består, i hovedsagen kun tåler at udsættes for trykkræfter.1 and 2, the carriers 12 are secured to the sidewall 3 by means of pins 15, which are mounted in holes in the sidewall and secured thereto by a protruding collar 15 ', and which furthermore fit into axial bores formed therefor in the carriers 12. As It will be apparent from the following that the fastening of the carriers may be effected in another way, however, it must be taken into account in the fastening that the sintered material, of which the carriers 12 consists, can withstand only compressive forces.
Udslyngningsåbningerne og medbringerne kan også være beliggende i en enkelt række eller i mere end to rækker, og antallet af medbringere kan være forskelligt fra antallet af udslyngningsåbninger. Under alle omstændigheder gælder imidlertid, at der må være en sådan fordeling af såvel udslyngningsåbninger som medbringere i hjulet, at dette er balanceret såvel statisk som under drift.The ejection openings and the carriers may also be located in a single row or in more than two rows, and the number of the carriers may be different from the number of ejection openings. In any case, however, there must be such a distribution of ejection openings as well as carriers in the wheel that this is balanced both statically and during operation.
Medbringerne 12 er i den viste udførelsesform keglestubformede, idet deres tværsnit aftager indefter i retning mod hjulets nav. Herved opnås et passende kompromis mellem formålet med medbringerne, der består i at forøge omdrejningshastigheden for laget af flydende opslemningsmateriale, hvilket kræver størst muligt areal af medbringerne i hjulets akseretning, og det navnlig ved medbringere af sintret materiale foreliggende ønske om mindst muligt slid på medbringerne, til hvis opfyldelse medbringernes areal i hjulets akseretning bør være mindst muligt, idet sintret materiale tåler skærende slid langt bedre end stødende slid, således at det er ønskeligt, at kollisionen mellem medbringerne og de slidende partikler i opslemningen i videst muligt omfang sker tangentielt og ikke radialt i forhold til medbringerne.In the illustrated embodiment, the carriers 12 are cone-shaped as their cross-section decreases inwardly towards the wheel hub. Hereby an appropriate compromise is achieved between the purpose of the carriers, which consists in increasing the speed of rotation of the layer of liquid slurry material, which requires the greatest possible area of the carriers in the axial direction of the wheel, and in particular the desire of the carriers for the least possible wear of the carriers. for whose fulfillment the area of the carriers in the axial direction of the wheel should be as small as possible, since sintered material can withstand cutting wear far better than abrasive wear, so that it is desirable that the collision between the carriers and the abrasive particles in the slurry occurs as far as possible tangentially and not radially in relation to the fellows.
141478 5141478 5
Endvidere er medbringeme dimensioneret således, at de i hjulets akseretning kun strækker sig over en del af det skålformede rim i hjulets indre, således at der er frit rum mellem medbringerne og såvel bunden 1 som dækpladen 4, hvorved sliddet på disse dele af hjulet bliver mindst muligt.Furthermore, the carriers are dimensioned so that in the axial direction of the wheel they extend only over part of the bowl-shaped rim in the interior of the wheel, so that there is free space between the carriers and both the bottom 1 and the cover plate 4, whereby the wear on these parts of the wheel becomes at least possible.
I fig. 3 er for et udsnit af den i fig. 1 og 2 viste udføre1sesform for forstøverhjulet ifølge opfindelsen illustreret en anden fastgørelsesmåde for medbringerne, som i denne figur er betegnet med henvisningsnummeret 18, i forhold til hjulets sidevæg 3. Den viste faetgørelsesmåde, der navnlig er egnet til anvendelse i tilfælde, hvor et eksisterende forstøverhjul skal forsynes med medbringere i overensstemmelse med opfindelsen, består i, at der i et passende antal af de forhåndenværende udslyngningsåbninger indsættes propper som vist ved 16, hvori der indskrues tappe 17, som til dette formål er forsynet med gevind i deres ene ende og i deres anden ende er udformet til forankring i akslale boringer i medbringerne 18, der også i denne udførelsesform er keglestubformede.In FIG. 3 is a sectional view of the embodiment of FIG. 1 and 2, the embodiment of the atomizer wheel according to the invention illustrated another method of attachment of the carriers, which in this figure is designated by reference number 18, to the side wall of the wheel 3. The shown method of attachment which is particularly suitable for use in cases where an existing atomizer wheel to be provided with carriers in accordance with the invention consists in inserting plugs in a suitable number of the available ejection openings as shown at 16, in which screws 17 are screwed in for this purpose at one end and at their ends. the other end is designed for anchoring in shaft bores in the carriers 18, which in this embodiment are also cone-shaped.
Medbringerne behøver imidlertid ikke nødvendigvis at være kegleformede, men kan som en anden mulighed også være kileformede, således som det fremgår af fig. 4 og 5, der ligesom fig. 3 viser et udsnit af den i fig. 1 og 2 viste udførelsesform for forstøverhjulet. Ligesom ved udførelsesformeme i fig. 1-2 og 3 har medbringeme, -som i fig. 4 og 5 er betegnet med 19, et tværsnit, der aftager indefter i retning mod hjulets nav 2. Kileformen opnås ved, at medbringeme 19 i hjulets akseretning begrænses af skrå planer, der er symmetriske om et radialt symmetriplan gennem medbringeren. Da det sintrede materiale 1 medbringeme som nævnt overfor langt bedre tåler skærende slid end stødende slid, er de kileformede medbringere 19 udformet og anbragt i forstøverhjulet med deres største tværdimension vinkelret på hjulets akseretning.However, the carriers do not necessarily have to be cone-shaped, but may also, as another option, be wedge-shaped, as shown in FIG. 4 and 5 which, like FIG. 3 shows a section of the embodiment of FIG. 1 and 2 illustrate the atomizer wheel. As with the embodiments of FIG. 1-2 and 3 have the carrying means, which in FIG. 4 and 5 are denoted 19, a cross-section which decreases inwards in the direction of the wheel hub 2. The wedge shape is obtained by limiting the carriers 19 in the axial direction of the wheel by inclined planes symmetrical about a radial plane of symmetry through the carrier. As the sintered material 1, as mentioned above, withstands much better cutting wear than abrasive wear, the wedge-shaped carriers 19 are formed and placed in the atomizer wheel with their largest cross-dimension perpendicular to the axis direction of the wheel.
Medbringeme 19 i fig. 4 og 5 er ved hjælp af tappe 20 fastgjort til hjulets sidevæg 3 på samme måde som beskrevet under henvisning til fig. 1 og 2.The carriers 19 of FIG. 4 and 5 are secured to the side wall 3 of the wheel by means of pins 20 in the same manner as described with reference to FIG. 1 and 2.
Ved forstøverhjul, hvor udslyngningsåbningerae som vist i fig. 1 og 2 er ordnet i mindst to rækker, kan medbringeme, der f.eks. er keglestubformede, være fastgjort til sidevæggen 3 mellem sådanne to rækker af udslyngningsåbninger og have en sådan udstrækning 1 hjulets akseretning, at de dækker begge rækker, idet der stadig er frit rim mellem medbringeme og såvél bunden 1 som dækpladen 4.At atomizer wheels, the ejection apertures as shown in FIG. 1 and 2 are arranged in at least two rows. are cone-shaped, fixed to the side wall 3 between such two rows of projecting openings, and having such an extension 1 in the axial direction of the wheel that they cover both rows, with still free rhyme between the carriers and both the bottom 1 and the cover plate 4.
For yderligere at beskytte bunden 1 mod slid kan der i forstøverhjulet på i og for sig kendt måde være anbragt et ringformet indlæg 21 af slidfast, sintret materiale mod bunden 1, og endvidere kan der omkring navet 2 i hjulets indre være anbragt et legeme 22, som danner en glideflade for den i hjulet indførte flydende opslemning.To further protect the bottom 1 from wear, an annular insert 21 of wear-resistant, sintered material may be placed in the atomizer wheel 21 on the bottom 1, and furthermore, a body 22 may be arranged around the hub 2 in the interior of the wheel. which forms a sliding surface for the liquid slurry introduced into the wheel.
I fig. 6 er vist en anden udførelsesform for forstøverhjulet. Hjulets opbygning med bunden 1, navet 2, sidevæggen 3, dækpladen 4 og udslyngningsåbningerae med de slidfaste bøsninger 8 er fuldstændig den samme som vist i fig.In FIG. 6 another embodiment of the atomizer wheel is shown. The structure of the wheel with the base 1, the hub 2, the side wall 3, the cover plate 4 and the discharge openings with the wear-resistant bushings 8 is completely the same as shown in FIG.
14U78 6 1 og 2, men de radialt rettede medbringere, der her er betegnet med 23, er i udførelsesformen i fig. 6 fastgjort i det ovennævnte, omkring navet 2 anbragte legeme 22 ved hjælp af tappe 24, som i deres ene ende er udformet med en krave 25, der danner anlæg for den yderste ende af medbringeren 23, og i deres anden ende har gevind til iskruning i en gevindboring i det nævnte legeme 22. I overensstemmelse med opfindelsen har medbringeme 23 og tappen 24 i denne udførelsesform en sådan længde, at den yderste ende af medbringerne befinder sig i det område mellem sidevæggen 3 og de mod navet vendende ender af de slidfaste bøsninger 8, hvor der under hjulets drift opbygges et lag af dispergeret materiale, fortrinsvis således at anlægskraven 25, der ligesom tappen 24 f.eks. kan være af stål, er helt beliggende i det pågældende område, hvorved den udsættes mindst muligt for slid.14U78 6 1 and 2, but the radially directed carriers indicated herein by 23 are in the embodiment of FIG. 6, secured in the above body 22 around the hub 2 by means of pins 24, which at one end are formed with a collar 25 which forms the outer end of the carrier 23 and at their other end has threaded ice screws in a threaded bore in said body 22. In accordance with the invention, the carriers 23 and the pin 24 in this embodiment have such a length that the outer end of the carriers is in the region between the side wall 3 and the ends facing the hub of the wear-resistant bushes. 8, where during the operation of the wheel a layer of dispersed material is built up, preferably such that the abutment collar 25 which, like the pin 24 e.g. can be of steel, is completely located in the area concerned, thereby exposing it to the least possible wear.
Ved den i fig. 6 viste montering af medbringerne på centralt fastgjorte tappe opnås i forhold til den i det foregående omtalte montering direkte i sidevæggen en større frihedsgrad med hensyn til medbringernes placering i forhold til udslyngningsåbningerne samt en mindre svækkelse og belastning af sidevæggene, fordi der ikke skal bores huller for medbringerne, og centrifugalkraften fra medbringerne under hjulets rotation optages af navet i stedet for af sidevæggen.In the embodiment shown in FIG. 6, the mounting of the carriers on centrally fastened pins is achieved in relation to the mounting directly in the sidewall mentioned above, a greater degree of freedom with regard to the position of the carriers in relation to the ejection openings and a smaller weakening and loading of the sidewalls, because no holes need to be drilled for the carriers, and the centrifugal force of the carriers during the rotation of the wheel is absorbed by the hub instead of by the side wall.
Yderligere lettes eventuel udskiftning af medbringerne ved, at det omdrejningslegeme 22, hvortil de er fastgjort, kan udtages af forstøverhjulet.Further, any replacement of the carriers is facilitated by the fact that the rotary body 22 to which they are attached can be removed by the atomizer wheel.
I fig. 7 er vist en yderligere udførelsesform for forstøverhjulet, navnlig beregnet til hjul af meget store dimensioner. Hjulets opbygning med en bund 26, et nav 27, en cylindrisk sidevæg 28, en dækplade 29 og udslyngningsåbninger med slidfaste bøsninger 30 svarer også her bortset fra den væsentligt større hjuldiameter til den, der er vist i fig. 1, 2 og 6, og de radialt rettede medbringere 3l er også her monteret på tappe 33, som er fastgjort i et omkring navet 27 anbragt legeme 32, der danner en glideflade for den i hjulet indførte flydende opslamning. Tappene 33 når imidlertid i dette tilfælde omtrent ud til sidevæggen 28, idet deres ender f.eks. ligger i en afstand på 0,5-1 mm fra denne, og er ikke forsynet med anlægskraver, hvorhos medbringerne 31 er monteret på tappene 33 med et vis slip i længderetningen, således at de under hjulets drift af centrifugalkraften vil blive presset fra en position, i hvilken deres inderste ender er i anlæg mod legemet 32, ud mod en position, hvor deres yderender er i anlæg mod sidevæggen 28. Udover de ovennævnte fordele ved montering af medbringerne på centralt fastgjorte tappe opnås herved en forenkling og billiggørelse af fremstillingen af monteringstappene i forhold til udførelsesformen i fig. 6. I udførelsesformen i fig. 7 er der yderligere opnået en forøgelse af virkningen af medbringerne ved, at der i forstøverhjulets skålformede rum yderligere er anbragt et antal aksialt rettede medbringere 35, som er fastgjort til dækpladen 29 i kortere afstand fra navet 27 end fra sidevæggen 28 ved 7 141478 hjælp af skruetappe 36 med anlægskraver 37. Til trods for at medbringeme 35 har deres største dimension liggende i forstøverhjulets akseretning» er disse medbringere og området omkring medbringemes fastgørelsespunkter i dækpladen 29 i denne udførelsesform ikke synderligt udsat for elid, fordi den flydende opslæmning på dette sted har en forholdsvis ringe hastighed i forhold til hjulet. Det vil forstås, at den i fig. 7 viste montering af de radialt rettede medbringere ikke er begrænset til hjul, hvor der også er aksialt rettede medbringere, men også kan finde anvendelse f.eks. ved en udførelsesform som vist i fig. 6.In FIG. 7, there is shown a further embodiment of the atomizer wheel, in particular for wheels of very large dimensions. The structure of the wheel with a base 26, a hub 27, a cylindrical sidewall 28, a cover plate 29 and flush openings with abrasion-resistant bushes 30 also here, except for the substantially larger wheel diameter, is similar to that shown in FIG. 1, 2 and 6, and the radially directed carriers 3I are also mounted here on pins 33 which are secured to a body 32 arranged around the hub 27 which forms a sliding surface for the liquid slurry introduced into the wheel. However, in this case the pins 33 reach approximately to the side wall 28, their ends e.g. is at a distance of 0.5-1 mm from it, and is not provided with abutment collars whereby the drivers 31 are mounted on the pins 33 with a certain longitudinal slip, so that during the operation of the wheel the centrifugal force will be pressed from a position , in which their inner ends abut against the body 32, towards a position where their outer ends abut against the sidewall 28. In addition to the aforementioned advantages of mounting the carriers on centrally fastened pins, hereby simplification and lowering of the manufacture of the mounting pins is achieved. relative to the embodiment of FIG. 6. In the embodiment of FIG. 7, an increase in the effect of the carriers is further achieved in that in the bowl-shaped compartment of the atomizer wheel there are further arranged a number of axially directed carriers 35 which are attached to the cover plate 29 at a shorter distance from the hub 27 than from the sidewall 28 at 7. screw lugs 36 with abutment collars 37. Although the lugs 35 have their largest dimension in the axial direction of the atomizer wheel, these lugs and the area around the attachment points of the lugs in the cover plate 29 in this embodiment are not particularly exposed because the liquid slurry at this location has a relatively poor speed relative to the wheel. It will be understood that the embodiment shown in FIG. 7, the mounting of the radially directed carriers is not limited to wheels where there are also axially directed carriers, but can also be used e.g. in one embodiment as shown in FIG. 6th
I de hidtil beskrevne udførelsesformer har de ved opfindelsen foreslåede ; medbringere vinkelret på hjulets akse været radialt orienterede, hvilket giver optimal medbringervirkning. For at reducere sliddet på hjulvæggen kan det imidlertid som antydningsvis illustreret i fig. 8 i visse tilfælde være hensigtsmæssigt at orientere medbringeme 38 med en i forhold til hjulets anløbsretning bagud-gående hældning i forhold til radierne gennem de nærmest sidevæggen 3 liggende ender af medbringerne, idet væske,som træder ind i hjulet og rammer medbringerne, herved vil være mindre tilbøjelig til at bringe forstyrrelse i det lag, som under " 1 ; i ;i hjulets drift opbygges ved sidevægen omkring medbringerendeme.In the embodiments heretofore described, they have been proposed by the invention; Carriers perpendicular to the axis of the wheel have been radially oriented, giving optimum carrier effect. However, to reduce the wear on the wheel wall, it may be illustrated in FIG. 8, in certain cases, it is appropriate to orient the carriers 38 with a inclination inclined in relation to the direction of the wheel relative to the radii through the ends adjacent to the side wall 3 of the carriers, liquid entering the wheel and hitting the carriers thereby being less likely to cause disturbance in the layer which, under "1; i; in wheel operation, builds up at the sidewall around the driver ends.
Den kapacitetsforøgelse,som med anvendelse af foranstaltningerne ifølge den foreliggende opfindelse opnås for et forstøverhjul af den angivne art, kan, som det vil fremgå af det følgende, bedst illustreres ved hjælp af eksempler.The increase in capacity obtained by using the measures of the present invention for a nebulizer wheel of the kind specified can best be illustrated by way of example by way of example.
Eksempel 1Example 1
Ved forstøvning af cementrås lam med et tørstofindhold på 56% anvendtes et forstøverhjul af den i fig. 1 og 2 viste udformning, men uden medbringere.When spraying cement raw lamb with a dry matter content of 56%, an atomizer wheel of the one shown in FIG. 1 and 2, but without a carrier.
Hjulets udvendige diameter var 225 mm, og hjulet havde 24 udslyngningsåbninger, alle forsynet med indragende, kegleformede, slidfaste bøsninger af sintret materiale.The outside diameter of the wheel was 225 mm and the wheel had 24 ejection openings, all provided with incised, cone-shaped, wear-resistant sintered material bushings.
Ved et omdrejningstal oå 7200 omdr/min blev den maksimale kapacitet for 3 ' " dette hjul målt til 19 m pr. time.At a speed of 7200 rpm, the maximum capacity of this wheel was measured at 19 meters per hour.
Herefter blev de slidfaste bøsninger i tolv af udslyngningsåbningerne erstattet med propper således som beskrevet under henvisning til fig. 3, hvori der blev fastgjort kegleformede medbringere, som ragede 25 mm ind i hjulet regnet fra de mod hjulets nav vendende ender af de slidfaste bøsninger.Thereafter, the wear-resistant bushings in twelve of the discharge openings were replaced with plugs as described with reference to FIG. 3, in which were fastened cone-shaped carriers which projected 25 mm into the wheel from the ends of the wheel-facing bushes facing the wheel hub.
Med samme omdrejningshastighed måltes den maksimale kapacitet for det så- 3 ledes modificerede forstøverhjul herefter til 45 m pr. time.At the same speed of rotation, the maximum capacity of the modified nebulizer wheel was then measured to 45 m per minute. hour.
Eksempel 2Example 2
Der anvendtes et forstøverhjul af samme type som i eksempel 1, men med en udvendig diameter på 280 mm, og hjulet havde også i dette tilfælde 24 udslyngningsåbninger, alle forsynet med indragende, slidfaste bøsninger.An atomizer wheel of the same type as in Example 1 was used, but with an outer diameter of 280 mm, and the wheel also had in this case 24 discharge openings, all provided with retractable, wear-resistant bushings.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5841972 | 1972-12-18 | ||
| GB5841972A GB1434203A (en) | 1972-12-18 | 1972-12-18 | Atomizer wheels for the atomization of slurries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK141478B true DK141478B (en) | 1980-03-24 |
| DK141478C DK141478C (en) | 1989-08-14 |
Family
ID=10481575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK652173AA DK141478B (en) | 1972-12-18 | 1973-12-03 | Nebulizer wheels for slurry spraying. |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US3887133A (en) |
| JP (1) | JPS5713342B2 (en) |
| AR (1) | AR204087A1 (en) |
| AU (1) | AU461264B2 (en) |
| BE (1) | BE808444A (en) |
| CA (1) | CA984875A (en) |
| DD (1) | DD108909A5 (en) |
| DE (1) | DE2361123C2 (en) |
| DK (1) | DK141478B (en) |
| ES (1) | ES421772A1 (en) |
| FI (1) | FI54072C (en) |
| FR (1) | FR2330253A5 (en) |
| GB (1) | GB1434203A (en) |
| IT (1) | IT1000518B (en) |
| SE (1) | SE394969B (en) |
| SU (1) | SU692545A3 (en) |
| ZA (1) | ZA739353B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1049919A (en) * | 1976-01-26 | 1979-03-06 | A/S Niro Atomizer | Wear-resistant rotor wheel |
| US4881956A (en) * | 1983-03-18 | 1989-11-21 | J. Edwards Enterprises | Method and device for cleaning particulate-laden gases |
| DK151129C (en) * | 1985-04-10 | 1988-10-17 | Niro Atomizer As | FRONT WHEEL WITH STEEL SOCKETS |
| US4898331A (en) * | 1988-12-22 | 1990-02-06 | A/A Niro Atomizer | Atomizer wheel with bushings of different inwardly protruding lengths |
| US5356075A (en) * | 1990-07-10 | 1994-10-18 | Apv Pasilac Anhydro As | Atomizer wheel with a divided wear ring |
| US5294059A (en) * | 1992-06-09 | 1994-03-15 | Willan W Craig | Device for directing the flow of an atomized slurry |
| US5226605A (en) * | 1992-09-30 | 1993-07-13 | Barr & Murphy (Canada) Ltee/Ltd. | Rotary atomizer disk with replaceable nozzle inserts and method for replacing inserts |
| EP0597163A1 (en) * | 1992-11-12 | 1994-05-18 | Niro Holding A/S | An atomizer wheel assembly |
| DE60017305T2 (en) * | 1999-03-24 | 2006-04-06 | Albemarle Netherlands B.V. | Atomizer wheel with improved nozzles for rotating atomizers |
| CA2314921A1 (en) * | 2000-08-03 | 2002-02-03 | Barry Partington | Apparatus and method for producing porous polymer particles |
| US6457657B1 (en) | 2000-09-01 | 2002-10-01 | Niro A/S | Atomizer wheel with wear-resistant inserts |
| JP2007222783A (en) * | 2006-02-23 | 2007-09-06 | Mitsubishi Heavy Ind Ltd | Spray disk structure of rotary atomizer |
| US20120048966A1 (en) * | 2008-09-09 | 2012-03-01 | John Bulder | Rotary Atomizer with Metal Foam Inserts |
| US9138758B2 (en) | 2011-02-08 | 2015-09-22 | Inland Pipe Rehabilitation Llc | Method and apparatus for application of mortar |
| US9095866B2 (en) | 2011-02-08 | 2015-08-04 | Inland Pipe Rehabilitation Llc | Method and apparatus for application of mortar |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1132814A (en) * | 1911-05-09 | 1915-03-23 | David B Weston | Centrifugal separator. |
| DE1065783B (en) * | 1955-12-20 | 1959-09-17 | ||
| NL120933C (en) * | 1960-03-14 | |||
| US3355106A (en) * | 1964-04-30 | 1967-11-28 | Stratford Eng Corp | Mixing atomizing rotor |
| DK117820B (en) * | 1965-03-26 | 1970-06-01 | Atomizer N Ak | Atomizer wheel for atomizing slurries of highly abrasive materials. |
| US3419220A (en) * | 1966-11-30 | 1968-12-31 | Gulf Research Development Co | Nozzles for abrasive-laden slurry |
| DK124566B (en) * | 1968-11-05 | 1972-10-30 | Niro Atomizer As | Atomizer wheels with wear-resistant sintered bushings. |
| CA1049919A (en) * | 1976-01-26 | 1979-03-06 | A/S Niro Atomizer | Wear-resistant rotor wheel |
-
1972
- 1972-12-18 GB GB5841972A patent/GB1434203A/en not_active Expired
-
1973
- 1973-01-01 AR AR251556A patent/AR204087A1/en active
- 1973-12-03 DK DK652173AA patent/DK141478B/en unknown
- 1973-12-07 DE DE2361123A patent/DE2361123C2/en not_active Expired
- 1973-12-10 ZA ZA739353A patent/ZA739353B/en unknown
- 1973-12-10 BE BE138703A patent/BE808444A/en not_active IP Right Cessation
- 1973-12-11 CA CA187,863A patent/CA984875A/en not_active Expired
- 1973-12-12 AU AU63525/73A patent/AU461264B2/en not_active Expired
- 1973-12-13 FR FR7344533A patent/FR2330253A5/en not_active Expired
- 1973-12-17 US US425654A patent/US3887133A/en not_active Expired - Lifetime
- 1973-12-17 FI FI3876/73A patent/FI54072C/en active
- 1973-12-17 DD DD175396A patent/DD108909A5/xx unknown
- 1973-12-17 SU SU731980904A patent/SU692545A3/en active
- 1973-12-17 IT IT70724/73A patent/IT1000518B/en active
- 1973-12-17 SE SE7317016A patent/SE394969B/en unknown
- 1973-12-17 ES ES421772A patent/ES421772A1/en not_active Expired
- 1973-12-18 JP JP14179273A patent/JPS5713342B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DD108909A5 (en) | 1974-10-12 |
| ES421772A1 (en) | 1976-05-01 |
| US3887133A (en) | 1975-06-03 |
| FI54072B (en) | 1978-06-30 |
| DE2361123A1 (en) | 1974-06-20 |
| AR204087A1 (en) | 1975-11-20 |
| DE2361123C2 (en) | 1984-08-09 |
| SE394969B (en) | 1977-07-25 |
| ZA739353B (en) | 1974-10-30 |
| BE808444A (en) | 1974-03-29 |
| JPS5713342B2 (en) | 1982-03-16 |
| FR2330253A5 (en) | 1977-05-27 |
| GB1434203A (en) | 1976-05-05 |
| DK141478C (en) | 1989-08-14 |
| JPS4996360A (en) | 1974-09-12 |
| AU461264B2 (en) | 1975-05-22 |
| IT1000518B (en) | 1976-04-10 |
| SU692545A3 (en) | 1979-10-15 |
| AU6352573A (en) | 1975-05-22 |
| FI54072C (en) | 1978-10-10 |
| CA984875A (en) | 1976-03-02 |
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