CN207308060U - A kind of air classification mill reducing mechanism - Google Patents
A kind of air classification mill reducing mechanism Download PDFInfo
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- CN207308060U CN207308060U CN201721266109.5U CN201721266109U CN207308060U CN 207308060 U CN207308060 U CN 207308060U CN 201721266109 U CN201721266109 U CN 201721266109U CN 207308060 U CN207308060 U CN 207308060U
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Abstract
The utility model provides a kind of air classification mill reducing mechanism, it is related to disintegrating apparatus technical field, the reducing mechanism includes turntable and be arranged at disk edge multiple hits column, the shape for hitting column is polygon column, one kind in cylinder, semicolumn, cylindroid, each hit the windward side of column or multiaspect is arranged to alveolar surface, the alveolar surface band is fluted and serrate projections are in the teeth groove being alternately present.The teeth groove shape being alternately present using groove and serrate projections hits column, forms " cushion " in the structure of groove, recycles the different effect of the inertia force of size particles, short grained movement velocity is greatly reduced, so as to reduce the probability that little particle collides rupture again；Bulky grain inertia is big, and air " cushion " is not enough to influence the speed of bulky grain, therefore will not reduce the crush efficiency of bulky grain.The utility model forms air " cushion " by tooth slot structure, realizes the optimization of air classification mill reducing mechanism.
Description
Technical field
It the utility model is related to disintegrating apparatus technical field, and in particular to a kind of air classification mill reducing mechanism.
Background technology
The preparation of powder body material generally has two kinds of approach, mechanical crushing method and chemical synthesis.Chemical synthesis is usually grasped
Make complexity, be not easy to amplify.Industrial conventional machinery comminuting method prepares powder.Air classification mill (Air classifying
Mill, abbreviation ACM are ground) it is a kind of common mechanical crushing equipment, it will be crushed, classification and three steps of collection are together in series to cooperate with and make
With.But air classification mill existing crushing problem of crossing in comminuting matter is that puzzlement mechanical crushing method prepares powder for a long time
The main problem of material.Crushing increase energy consumption is crossed, reduces product yield, simultaneously because a large amount of short grained presence, add production
The particle size distribution span of product, reduces the quality of product.Such as when preparing powdery paints, the presence of a large amount of meticulous sticky particles
The mobility of powder can be substantially reduced so that spraying is difficult to.
In order to reduce too small particle fraction, reduce grain diameter span, generally use increase crushes last handling process, such as more
Secondary classification adds screening etc. to remove little particle or oversized particles.Although these methods can reduce particle diameter distribution, can increase
Add the energy consumption of crushing process and the complexity of technique, while also need to increase a large amount of extras and manpower, increase processing procedure
Cost.To overcome disadvantage mentioned above, the distribution of grain diameter is controlled on the premise of equipment and process is not increased, then needs consideration pair
The self structure of air classification mill is transformed and optimized.
According to the structure of grading mill, causing to crush mainly has the reason for two aspects：First, clasfficiator can not possibly be thin
Little particle is fully separated from the particle that return reducing mechanism is crushed again；Second, reducing mechanism cannot be distinguished by particle
Size and the fine particle after return is crushed again.According to above-mentioned analysis, the uniformity of grain diameter after being crushed for raising,
Optimization of the transformation mainly to reducing mechanism and clasfficiator to air classification mill.
It is few currently for the patent of air classification mill structure optimization, wherein utility model CN202478997U in 2012
" direct absorbing type air classification milling machine ", is mainly installed on same rotor position holder top, to subtract by mill and clasfficiator
Few aerodynamic loss, improves wind fortune efficiency, easy to disassemble and maintenance, but the transformation is not related to the improvement of crushing mechanism, it is impossible to reduces
Cross the particle size distribution of fine grain generation and reduction product.
Utility model patent CN 201720091U (2010) " reducing mechanism for being used for air classification mill " are for crushing
The transformation of device.The patent replaces square column type pin using round and smooth (such as cylinder) the crushing pin (hitting column) in corner, to reduce
The powder size skewness caused by square column type crushes pin apex angle with side hitting power difference, improves powder to a certain extent
The uniformity of last size distribution.Although it is uneven that the patent can reduce the collision that square column type pin is brought, tiny cannot be distinguished by
Grain and bulky grain, therefore can not solve the problems, such as that fine particle is repeatedly crushed.
Utility model content
The utility model provides a kind of air classification mill reducing mechanism, by reducing fine particle in reducing mechanism again
The intensity of collision reduced degree of grinding, so as to reduce particle size distribution, reduced energy consumption, while improve product yield.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows：
A kind of air classification mill reducing mechanism, the reducing mechanism include a turntable and are arranged on multiple at disk edge
Column is hit, the shape for hitting column is polygon column, one kind in cylinder, semicolumn, cylindroid, each hits the windward side or more of column
Face is arranged to alveolar surface, and the alveolar surface band is fluted and serrate projections are in the teeth groove being alternately present.
Preferably, the cross sectional shape of the serration is one kind of triangle, trapezoidal, rectangle or other shapes.
Preferably, the depth of groove is with hitting the ratio between column equivalent diameter as 1:12-1:3.
Preferably, the serrate projections bottom width is with hitting the ratio between column equivalent diameter as 1:12-1:2.
Preferably, the recess width is 0-1 with hitting the ratio between column equivalent diameter:2.
Preferably, the serrate projections side and bottom portion of groove angle are 90-150 °.
Compared to the prior art, the beneficial effects of the utility model are：
This patent hits column using teeth groove shape, and reduce air classification mill crosses crushing problem.For teeth groove shape hit column for,
As shown in figure 3, when particle is reached with identical speed and hits column windward side leading edge, due to the presence of groove, particle is not reached and hit
The impact surface of column, not yet occurs effective collision.The structure of groove can preserve the air of partial silence, be formed " cushion ", when
Particle continues from when hitting column leading edge and moving to the impact surface for hitting column, and due to the presence of air " cushion ", particle reaches dentation and hits
Speed during column impact surface reduces, and the kinetic energy that particle possesses reduces, so that particle occurs broken probability and reduces.Air is " slow
Rush layer " to the particle effect difference of different-grain diameter.Short grained inertia is small, and short grained movement can be greatly reduced in " cushion "
Speed, so as to reduce the probability that little particle collides rupture again；And bulky grain inertia is big, air " cushion " is not enough to influence big
The speed of particle, therefore the crush efficiency of bulky grain will not be reduced.The utility model forms air " buffering by tooth slot structure
Layer ", realizes the optimization of air classification mill reducing mechanism.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model air classification mill；
Fig. 2 is the partial enlarged view at A；
Fig. 3 is that tooth slot structure hits particles collision schematic diagram on column；
Fig. 4 is a variety of tooth slot structure schematic diagrames for hitting column；
When Fig. 5 is identical middle particle diameter D50, pair of the D10 of the product obtained after Application Example 1,2 and comparative example 1
Compare design sketch；
When Fig. 6 is identical middle particle diameter D50, Application Example 1,2 and the particle diameter distribution of the product obtained after comparative example 1
(Span) contrast effect figure；
In figure mark for：1st, feeding screw；2nd, reducing mechanism；3rd, clasfficiator；4th, cyclone separator；5. bag hose；6、
Mill；7th, column is hit；8th, gear ring；9th, air deflector；
The direction of arrow is moved towards for gas in figure.
Embodiment
All features disclosed in this specification, can be with any in addition to mutually exclusive feature and/or step
Mode combines.
Elaborate below in conjunction with the accompanying drawings to the utility model.
As shown in Figure 1 and Figure 2, the equipment used in the utility model is typical air classification mill, by feeding screw 1,
Reducing mechanism 2, clasfficiator 3, cyclone separator 4 and bag hose 5 form, and can be continuously completed the crushing of raw material, point of product
Level and collection task, reducing mechanism is made of mill 6, multiple column 7, gear ring 8 and air deflectors 9 of hitting, wherein hitting the structure of column 7 such as
Shown in Fig. 4.
During using air classification mill, raw material is placed in hopper first, is sent into by feeding screw 1 inside grinding machine.By
It is in negative pressure state inside grinding machine, the raw material into grinding machine can be driven by air-flow from bottom to top and rotating main mill hits column 7 and tooth
Circle 8, which bumps against, to be occurred to crush.Particle after crushing is less easily entrained by be reached near clasfficiator 3 by the deflector on air deflector 9, compared with
Thin particle can enter cyclone separator 4 by the impeller clearance of clasfficiator 3, and thicker particle is graded the stop of device 3 and returns to
Disintegrating area is crushed again.Cyclone separator 4 is brought into by air-flow by the particle of clasfficiator 3, is received by 4 bottom of cyclone separator
As product, the fine powder that 4 top of cyclone separator produces will be completed to catch the particle collected in bag hose 5.
Embodiment 1
It is four-prism in being uniformly arranged 9 on Φ 140.5mm contours and hitting 7,9, column to hit column 7 on Φ 154mm mills 6
Shape, apparent size are 12mm (length) × 12mm (width) × 19mm (height), and 9 tooth slot structures for hitting column 7 are identical, each hit column 7
Windward side is disposed as alveolar surface, remaining is smooth surface, the fluted teeth groove being alternately present with sawtooth of the alveolar surface band, tooth
Groove is in be set parallel to the bottom surface for hitting column 7, and the axial alignment of column 7 is hit on edge, and is evenly distributed, and the shape of sawtooth projection is triangle
Shape, sawtooth projection bottom width are 2.06mm, and bottom portion of groove width is 2.65mm, depth of groove 3mm, sawtooth projection side
Face and bottom portion of groove angle are 109 °.
Embodiment 2
In addition to following parameters, remaining parameter is same as Example 1：Triangular hill bottom width is 1.49mm, groove-bottom
Portion's width is 2.31mm, and depth of groove 2mm, sawtooth projection side and bottom portion of groove angle are 120.
Embodiment 3
In addition to following parameters, remaining parameter is same as Example 1：The shape of sawtooth projection is trapezoidal, sawtooth projection
Bottom width is 2.06mm, and bottom portion of groove width is 2.65mm, depth of groove 2mm, sawtooth projection side and bottom portion of groove
Angle is 109.
Embodiment 4
It is cylindrical type to set 9 to hit 7,9, column to hit column 7 on mill 6, and apparent size is Φ 12mm × 19mm (height), and 9 are hit
The tooth slot structure of column 7 is identical, and the cylindrical side surface for each hitting column 7 is disposed as alveolar surface, and the alveolar surface band is fluted and saws
The teeth groove that tooth is alternately present, teeth groove are in be set parallel to the bottom surface for hitting column 7, and the axial alignment of column 7 is hit on edge, and is evenly distributed, and is sawed
The shape of toothed projections is triangle, and sawtooth projection bottom width is 2.06mm, and bottom portion of groove width is 2.65mm, and groove is deep
Spend for 3mm, sawtooth projection side and bottom portion of groove angle are 109.
Application Example 1
Using small air grading mill comminuted polyurethane coating agent which has to be dissolved in alcohol before use (a diameter of 5-8mm, irregular shape).Select embodiment 1
In teeth groove shape hit column, alveolar surface is located at impact surface (windward side).Operating condition is air velocity 4m/s, charging rate 26.5g/
Min, hits column linear velocity 100-140m/s, clasfficiator (Φ 90mm × 28mm (height)) rotating speed 1100-2660rpm.
Application Example 2
Using small air grading mill comminuted polyurethane coating agent which has to be dissolved in alcohol before use (a diameter of 5-8mm, irregular shape).Select embodiment 2
In teeth groove shape hit column, alveolar surface is located at impact surface (windward side).Operating condition is air velocity 4m/s, charging rate 26.5g/
Min, hits column linear velocity 100-140m/s, clasfficiator (Φ 90mm × 28mm (height)) rotating speed 1100-2660rpm.
Comparative example 1
Using small air grading mill comminuted polyurethane coating agent which has to be dissolved in alcohol before use (a diameter of 5-8mm, irregular shape).Prismatic is selected to hit
Column, it is 12mm (length) × 12mm (width) × 19mm (height) to hit column dimension, and it is smooth (slotless) to hit each surface of column.Operating condition is sky
Gas velocity 4m/s, charging rate 26.5g/min, hit column linear velocity 100-140m/s, and clasfficiator (Φ 90mm × 28mm (height)) turns
Fast 1100-2660rpm.
Effect assessment
Hit the effect of column transformation and obtain small particle content and the particle diameter distribution of product by contrasting not same strike column and represent.
In Fig. 5 and Fig. 6, D10The particle volume for representing less than this particle diameter accounts for the 10% of particle overall volume, middle particle diameter D50Expression is more than or small
50%, D is respectively accounted in the particle of this value90The particle volume for representing less than this particle diameter accounts for the 90% of particle overall volume.Grain diameter point
Cloth span Span=(D90-D10)/D50For representing particle diameter distribution.As shown in Figure 5, in identical middle particle diameter D50Under conditions of, teeth groove
Shape hits the product D that column obtains10Dramatically increase, illustrated the reduction of small size particle content；As shown in fig. 6, in identical middle particle diameter D50
Under conditions of, teeth groove shape hits the product Span that column obtains and substantially reduces, and illustrates narrow particle size distribution.Subtract further, since crossing crushing
Few, particle recovery is improved.Simultaneously as grinding machine energy of the consumption on fine powder was produced is reduced, teeth groove shape hits column
Crush efficiency be improved.
In conclusion the teeth groove shape described in the utility model patent hits column, on the basis of additional energy is not increased, make machine
Tool crushes common crushing problem of crossing and is significantly improved, so as to narrow the distribution span of grain diameter.Crushed due to crossing
Reduction, the utilization of energy utilization rate and crushed material is improved, so this improvement also improves the crushing of equipment at the same time
The yield of efficiency and product.
It is the embodiment of the utility model as described above.The utility model is not limited to the above embodiment, anyone
It should learn the structure change made under the enlightenment of the utility model, it is every that there is same or like skill with the utility model
Art scheme, each falls within the scope of protection of the utility model.
Claims (6)
1. a kind of air classification mill reducing mechanism, which includes a turntable and be arranged at disk edge multiple hits
Column, it is characterised in that the shape for hitting column is polygon column, one kind in cylinder, semicolumn, cylindroid, each hits column
Windward side or multiaspect are arranged to alveolar surface, and the alveolar surface band is fluted and serrate projections are in the teeth groove being alternately present.
A kind of 2. air classification mill reducing mechanism as claimed in claim 1, it is characterised in that：The section shape of the serration
Shape is triangle, trapezoidal, rectangle one kind.
A kind of 3. air classification mill reducing mechanism as claimed in claim 1, it is characterised in that：The depth of groove is worked as with hitting column
It is 1 to measure diameter ratio:12-1:3.
A kind of 4. air classification mill reducing mechanism as claimed in claim 1, it is characterised in that：The serrate projections bottom width
With hitting the ratio between column equivalent diameter as 1:12-1:2.
A kind of 5. air classification mill reducing mechanism as claimed in claim 1, it is characterised in that：The recess width is worked as with hitting column
Amount diameter ratio is 0-1:2.
A kind of 6. air classification mill reducing mechanism as claimed in claim 1, it is characterised in that：The serrate projections side with it is recessed
Trench bottom angle is 90-150o.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721266109.5U CN207308060U (en) | 2017-09-28 | 2017-09-28 | A kind of air classification mill reducing mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721266109.5U CN207308060U (en) | 2017-09-28 | 2017-09-28 | A kind of air classification mill reducing mechanism |
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| Publication Number | Publication Date |
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| CN207308060U true CN207308060U (en) | 2018-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552204A (en) * | 2017-09-28 | 2018-01-09 | 绵阳高新区奥峰粉体技术有限公司 | A kind of air classification mill reducing mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552204A (en) * | 2017-09-28 | 2018-01-09 | 绵阳高新区奥峰粉体技术有限公司 | A kind of air classification mill reducing mechanism |
| CN107552204B (en) * | 2017-09-28 | 2024-04-30 | 天津西敦粉漆科技有限公司 | Air classifying mill reducing mechanism |
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Effective date of registration: 20210325 Address after: 300380 1a-702, Tian'an Digital City, No.1, Tian'an Road, Zhangjiawo Town, Xiqing District, Tianjin Patentee after: TIANJIN XIDUN POWDER PAINT TECHNOLOGY Co.,Ltd. Address before: 621000 No.25, south section of torch West Street, high tech Zone, Mianyang City, Sichuan Province Patentee before: MIANYANG HIGH-NEW AOFENG POWDER TECHNOLOGY Co.,Ltd. |