CN103752387B - The abrasive dust structure of environment-friendly and energy-efficient eddy mill - Google Patents
The abrasive dust structure of environment-friendly and energy-efficient eddy mill Download PDFInfo
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- CN103752387B CN103752387B CN201410012700.2A CN201410012700A CN103752387B CN 103752387 B CN103752387 B CN 103752387B CN 201410012700 A CN201410012700 A CN 201410012700A CN 103752387 B CN103752387 B CN 103752387B
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Abstract
The invention discloses a kind of abrasive dust structure of environment-friendly and energy-efficient eddy mill, the rotor comprising mill chamber and be arranged in mill chamber and circumference are distributed on some abrading blocks of rotor outer peripheral face, abrading block is pressure surface along the one side of direction of rotation, another side is suction surface, wherein from direction of rotation, pressure surface is front, and suction surface is rear; Suction surface is provided with a negative pressure plate, between the side of the suction surface of the relatively described abrading block of negative pressure plate and the suction surface of abrading block, there is certain interval.When rotor band dynamic grinding block High Rotation Speed, on the working face of the eddy current effect mill chamber produced after the air-flow in the radial circumference direction produced perpendicular to the pressure reduction between the air-flow of tangential direction with the pressure surface of abrading block to negative pressure plate produced intersects, the speed of the air-flow in the radial circumference direction produced due to the pressure reduction between pressure surface to negative pressure plate is very high, make material in mill chamber at a high speed, under the eddy current effect of high strength, produce strong head-on collision, autogenous grinding, reach effective pulverizing.
Description
Technical field
The present invention relates to technical field of powder engineering, particularly a kind of abrasive dust structure of various material being carried out to the environment-friendly and energy-efficient eddy mill of ultra-fine grinding.This abrasive dust structure is not only for the leading-edge field such as military project, space flight, and extensively applied in different industries, as chemical industry, electronics, machinery, metallurgical building materials, plastics, rubber, food, medicine, papermaking, daily use chemicals, the energy, the relevant industries such as the super-fine processing of environmental protection, nonmetallic materials.
Background technology
Ultrafine powder technology is called cross-centennial new and high technology by domestic and international scientific and technological circle.
Along with developing rapidly of science and technology, the research application of superfine material and nano material, has broad application prospects, and has extremely important effect to promotion industrial technological advancement.Generally be called superfine powder by 10 microns with thin powder, 1 micron is called superfine material with thin powder, and 0.1 micron is called nano material with thin powder.
Production equipment and the technology of super-fine material mainly contain at present: mechanical impact crusher, airslide disintegrating mill and oscillating mill etc.The general character of these technical equipment is, broken mill Limit Grain Size can only reach 5 microns, and the suitability for industrialized production that reach super-fine material also has certain technology and technology difficulty, the problems such as ubiquity yields poorly, energy consumption is high, and environmental-protecting performance is poor, powder purity is lower.
Airslide disintegrating mill is ultra-fine equipment more advanced in the world at present, mainly contains following several types: 1. flat air flow crusher; 2. circulating airslide disintegrating mill; 3. pair spray formula airslide disintegrating mill; 4. target formula airslide disintegrating mill; 5. fluidized bed airflow pulverizer etc.; The jet powder and the classifying equipoment (model JFC-30) that have BJ University of Aeronautics & Astronautics of current key popularized project, working media is compressed air, gas consumption 15m
3/ min, power 170kW, feed size 0.5mm, product grading 2-8 micron, fineness of materials d50 can only reach 2-40 micron, output 30kg/ hour.Also have Chinese Academy of Sciences Beijing three ring powder High-tech company fluidized bed jet mill, fineness of materials d50 can only reach 2-40 micron.According to another " ultra-fine grinding classification technique " (China Light Industry Press, calendar year 2001 publishes) bibliographical information: there are the following problems for airslide disintegrating mill: 1, energy consumption is large, production efficiency is low.2, output is less, is generally no more than 100kg/h, and major part is less than 50kg/h.3, superfine powder is prepared also more difficult.4, airslide disintegrating mill complex structure, expensive.For above problem, airflow pulverization is currently not advanced.
Mechanical impact crusher and vibration medium grinder are a kind of more traditional mechanical grinding equipment, and mechanical type is many.Its mechanism utilizes mechanical energy Direct driver medium motion to carry out comminuting matter, and crushing effect is also very low, and difficulty reaches powder purity requirement, and it is poor that powder fineness compares airflow milling.Such as vibrate medium grinder effectively to pulverize power and be about 0.3%, and the Conversion of Energy being about 98% is heat and loss.Airslide disintegrating mill utilizes to penetrate energy comminuting matter up to velocity of sound or subsonic air-flow.And mechanical energy is converted to velocity of sound air motion energy, need to consume a large amount of energy, the former is larger for its energy consumption work ratio.
The technology of preparing of superfine material (submicron order), does not also find the report having this respect both at home and abroad at present, it was reported that superfine material is a kind of bottleneck material be limited between super-fine material and nano material, does not also have technology of preparing to produce at present.
The technology of preparing of super nano material is reported often at present, mainly makes chemically to prepare, has solid phase method, liquid phase method, vapor phase method and plasma method, laser method etc.Separately have report to discuss, adopt the nano material that chemical method is produced, often change the physical property of material itself, do not reach the result of use of nano material, and agglomeration traits is difficult to solve, production efficiency is low, and processing cost is expensive.Can only produce in laboratory at present, cannot suitability for industrialized production be realized.
In order to the ultrafine powder needed for energy High-efficient Production and nano-powder, China Patent Publication No. CN1929925B discloses a kind of high energy turbulence mill and two negative pressure worm gear thereof, the two negative pressure worm gear of its critical component comprises multiple blades that Ye Panhe is arranged on these leaf dish two sides, wherein this blade is in the circumferentially uniform distribution of each side of this leaf dish, and rotation direction is identical, the blade being positioned at this leaf dish side and the blade being positioned at this leaf dish another side are circumferentially wrong next each other; This pair of negative pressure worm gear also has multiple impact tooth plate, each impact tooth plate comprises an installation portion is connected this installation portion operate portions with one, be formed with paired impact teeth at the top of this operate portions, two impact teeth in often pair of impact teeth with tooth top relatively away from mode tilt.When this pair of negative pressure worm gear during High Rotation Speed, can produce high-strength eddy current and turbulent flow in mill chamber inside in mill chamber, thus form Dual-Phrase Distribution of Gas olid, material is under the effect of high turbulence, the strong autogenous grinding of mutual generation, produces strong head-on collision and shear force simultaneously, thus is effectively pulverized by material.0.1-0.9 μm is reached with the high energy turbulence mill product grading that this pair of negative pressure worm gear is formed.
The mechanism of this pair of negative pressure worm gear turbulization is: because bi-negative pressure turbine impacts tooth plate by left and right throwing arc hypsokinesis blade and swallow-tail form to be assembled, blade is scalene cone near one end of sharf and defines swirling simultaneously, two eddy current is defined when High Rotation Speed, two eddy current creates again two negative pressure, the generation of two negative pressure defines again high-strength centrifugal force, when pulverized solid material is in high turbulence factory in mill chamber, just constitute Dual-Phrase Distribution of Gas olid, from the turbulence energy that worm gear obtains, little whirlpool is passed to step by step by Maelstrom by effect of inertia, material produces strong shock in this turbulent motion, autogenous grinding, shear force, thus material is pulverized effectively, in addition, stator guiding gear ring produces the guiding shearing force to material in mill chamber, powder is in zigzag turbulent motion region, produce strong autogenous grinding each other, accelerate effective refinement of material.But this pair of negative pressure worm gear needs higher rotating speed, therefore very high to the requirement of motor and blade, impact tooth plate intensity, energy consumption is also higher simultaneously.This pair of negative pressure worm gear arrangement also more complicated in addition.
Summary of the invention
Technical problem to be solved by this invention is for shortcomings and deficiencies of the prior art, there is provided a kind of energy-conservation, structure is simple, the abrasive dust structure of the environment-friendly and energy-efficient eddy mill of good crushing effect, the eddy current produced after the air-flow in the radial circumference direction produced perpendicular to the pressure reduction between the air-flow in tangential motion direction with the pressure surface of abrading block to suction surface that this abrasive dust structure utilizes abrading block to produce when High Rotation Speed intersects, act in the mill chamber of working face, make material in mill chamber at a high speed, under the eddy current effect of high strength, produce strong head-on collision, autogenous grinding, thus material is effectively pulverized.
Technical problem solved by the invention can realize by the following technical solutions:
The abrasive dust structure of environment-friendly and energy-efficient eddy mill, comprise some abrading blocks that the mill chamber surrounded by outer cylinder body and the rotor be arranged in described mill chamber and circumference are distributed on the outer peripheral face of described rotor, it is characterized in that, described abrading block is pressure surface along the one side of direction of rotation, another side is suction surface, wherein from direction of rotation, pressure surface is front, and suction surface is rear; Described suction surface is provided with a negative pressure plate, between the side of the suction surface of the relatively described abrading block of described negative pressure plate and the suction surface of described abrading block, there is certain interval.
In a preferred embodiment of the invention, certain distance is left between the bottom of described negative pressure plate and the root of abrading block.
In a preferred embodiment of the invention, pressure surface and the region between the suction surface seeing last abrading block along abrading block direction of rotation of a certain abrading block form the malleation chamber of this certain abrading block relative, and suction surface and the region between the pressure surface seeing a rear abrading block along abrading block direction of rotation of this certain abrading block form the negative pressure cavity of this certain abrading block relative.
In a preferred embodiment of the invention, the flow area at the interval between the side of the suction surface of the relatively described abrading block of described negative pressure plate and the suction surface of described abrading block is less than long-pending 10 ~ 1000 times of the circumferential cross-section in described malleation chamber.
In a preferred embodiment of the invention, the pressure surface of described abrading block is less than the suction surface of this abrading block relative to angle in the periphery of described rotor relative to angle in the periphery of rotor.
In a preferred embodiment of the invention, the inner cavity surface of described mill chamber is provided with gear ring, and the end face of described abrading block is circumferentially evenly equipped with some helical teeth, leaves certain gap between the tooth top of described gear ring and the tooth top of described helical teeth.
In a preferred embodiment of the invention, described abrading block is made up of support portion and wear-resisting portion, and described wear-resisting portion is arranged on the top of described support portion, and the top in described wear-resisting portion is circumferentially evenly equipped with some helical teeth.
The advantage of operation principle of the present invention is: when rotor band dynamic grinding block High Rotation Speed, on the working face of the eddy current effect mill chamber produced after the air-flow in the radial circumference direction produced perpendicular to the pressure reduction between the air-flow of tangential direction with the pressure surface of abrading block to negative pressure plate produced intersects, the speed of the air-flow in the radial circumference direction produced due to the pressure reduction between pressure surface to negative pressure plate is very high, 500km/h can be reached, even be greater than 1000km/h, make material in mill chamber at a high speed, under the eddy current effect of high strength, produce strong head-on collision, autogenous grinding, thus material is effectively pulverized.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the axial front view of the abrasive dust structure of environment-friendly and energy-efficient eddy mill of the present invention.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Shown in Figure 1, the abrasive dust structure of environment-friendly and energy-efficient eddy mill comprises the mill chamber 100 surrounded by outer cylinder body 1, armature spindle 200 is in axial direction furnished with in mill chamber 100, on the outer peripheral face 210 of armature spindle 200, circumference is evenly equipped with six pieces of abrading blocks 300, each abrading block 300 is made up of support portion 310 and wear-resisting portion 320, support portion 310 is fixed on the outer peripheral face 210 of armature spindle 200, wear-resisting portion 320 is fixed on the top of support portion 310, and the top in wear-resisting portion 320 is circumferentially evenly equipped with some helical teeth 321.And the inner cavity surface of mill chamber 100 is provided with gear ring 101, leave certain gap between the tooth top of the tooth top of gear ring 101 and the helical teeth 321 at top, wear-resisting portion 320 to form gas channel 102.
Abrading block 300 is pressure surface 301 along the one side of direction of rotation, and another side is suction surface 302, and wherein from direction of rotation, pressure surface 301 is front, and suction surface 302 is rear.Suction surface 302 is provided with a negative pressure plate 400, there is certain interval to form through-flow channel 410 between the side 401 in negative pressure plate 400 negative relative face 302 and suction surface 302.Between the bottom of negative pressure plate 400 and the root of abrading block 300, leave certain distance export 420 to form high velocity air.
Pressure surface 301 and the region between the suction surface 302 seeing last abrading block 300 along abrading block 300 direction of rotation of each abrading block 300 form the malleation chamber 110 of this abrading block 300 relative, and suction surface 302 and the region between the pressure surface 301 seeing a rear abrading block 300 along abrading block 300 direction of rotation of this abrading block 300 form the negative pressure cavity 120 of this abrading block 300 relative.The flow area of through-flow channel 410 is less than long-pending 10 ~ 1000 times of the circumferential cross-section in malleation chamber 110, so the air velocity that air-flow produces when malleation chamber 110 flows to negative pressure cavity 120 via through-flow channel 410 is very high.
In order to make abrading block 300 more easily produce high velocity air in rotary course, the pressure surface 301 of abrading block 300 is less than the suction surface 302 of this abrading block 300 relative to angle in armature spindle 200 periphery relative to angle in armature spindle 200 periphery 210.
The advantage of operation principle of the present invention is: when armature spindle 200 is with dynamic grinding block 300 High Rotation Speed, the air-flow in the radial circumference direction that the pressure reduction between the air-flow perpendicular to tangential direction produced and pressure surface 301 to the negative pressure plate 400 of abrading block 300 produces intersects on the working face of the rear eddy current effect mill chamber 100 produced, and wherein air flow direction is as shown in filled arrows direction in figure.The flow area of through-flow channel 410 is less than long-pending 10 ~ 1000 times of the circumferential cross-section in malleation chamber 110, so the speed of the air-flow in radial circumference direction that the pressure reduction between pressure surface 301 to negative pressure plate 400 produces is very high, 500km/h can be reached, even be greater than 1000km/h, make material in mill chamber 100 at a high speed, under the eddy current effect of high strength, produce strong head-on collision, autogenous grinding, thus material is effectively pulverized.
The present invention can be used as the pulverizing abrasive dust structure of multiple fields, and power consumption of the present invention is low, its power consumption is 20 ~ 50% of general high velocity turbulent flow mill, energy-conservation to 50 ~ 80%, and not high to armature spindle 200 rotation speed requirements, general rotation speed requirements can reach significant crushing effect.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. the abrasive dust structure of environment-friendly and energy-efficient eddy mill, comprise some abrading blocks that the mill chamber surrounded by outer cylinder body and the rotor be arranged in described mill chamber and circumference are distributed on the outer peripheral face of described rotor, it is characterized in that, described abrading block is pressure surface along the one side of direction of rotation, another side is suction surface, wherein from direction of rotation, pressure surface is front, and suction surface is rear; Described suction surface is provided with a negative pressure plate, between the side of the suction surface of the relatively described abrading block of described negative pressure plate and the suction surface of described abrading block, there is certain interval.
2. the abrasive dust structure of environment-friendly and energy-efficient eddy mill as claimed in claim 1, is characterized in that, leave certain distance between the bottom of described negative pressure plate and the root of abrading block.
3. the abrasive dust structure of environment-friendly and energy-efficient eddy mill as claimed in claim 2, it is characterized in that, pressure surface and the region between the suction surface seeing last abrading block along abrading block direction of rotation of a certain abrading block form the malleation chamber of this certain abrading block relative, and suction surface and the region between the pressure surface seeing a rear abrading block along abrading block direction of rotation of this certain abrading block form the negative pressure cavity of this certain abrading block relative.
4. the abrasive dust structure of environment-friendly and energy-efficient eddy mill as claimed in claim 3, it is characterized in that, the circumferential cross-section that the flow area at the interval between the side of the suction surface of the relatively described abrading block of described negative pressure plate and the suction surface of described abrading block is less than described malleation chamber is amassed.
5. the abrasive dust structure of environment-friendly and energy-efficient eddy mill as claimed in claim 4, it is characterized in that, the pressure surface of described abrading block is less than the suction surface of this abrading block relative to angle in the periphery of described rotor relative to angle in the periphery of rotor.
6. the abrasive dust structure of environment-friendly and energy-efficient eddy mill as claimed in claim 5, it is characterized in that, the inner cavity surface of described mill chamber is provided with gear ring, and the end face of described abrading block is circumferentially evenly equipped with some helical teeth, leaves certain gap between the tooth top of described gear ring and the tooth top of described helical teeth.
7. the abrasive dust structure of the environment-friendly and energy-efficient eddy mill as described in claim as arbitrary in claim 1 to 6, it is characterized in that, described abrading block is made up of support portion and wear-resisting portion, and described wear-resisting portion is arranged on the top of described support portion, and the top in described wear-resisting portion is circumferentially evenly equipped with some helical teeth.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105728147B (en) * | 2016-03-07 | 2018-05-08 | 钟文虎 | Counter-impact flow pulverizer structure and pulverizer |
| CN105935620B (en) * | 2016-05-04 | 2017-04-26 | 广州致密纳米技术有限公司 | Preparation device for nano material |
| CN113019640B (en) * | 2021-03-29 | 2022-07-22 | 南京工程学院 | Efficient superhard ultramicro powder vertical hydraulic turbulent mill |
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| GB629916A (en) * | 1947-11-27 | 1949-09-30 | L & C Hardtmuth Great Britain | Improvements in or relating to grinding mills |
| EP0244849B1 (en) * | 1986-05-09 | 1990-09-19 | Santrade Ltd. | Pelletizing apparatus with a perforated hollow cylinder |
| CN2180330Y (en) * | 1993-11-04 | 1994-10-26 | 吴斌 | High-effect impact crusher |
| CN1562489A (en) * | 2004-04-15 | 2005-01-12 | 杨富茂 | Mechanical turbulence milling tools |
| CN1929925A (en) * | 2004-03-23 | 2007-03-14 | 杨富茂 | High turbulence mill and its bi-negative pressure turbine |
| CN203711107U (en) * | 2014-01-12 | 2014-07-16 | 上海红箭自动化设备有限公司 | Grinding structure of environment-friendly energy-saving type eddy pulverizer |
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2014
- 2014-01-12 CN CN201410012700.2A patent/CN103752387B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB629916A (en) * | 1947-11-27 | 1949-09-30 | L & C Hardtmuth Great Britain | Improvements in or relating to grinding mills |
| EP0244849B1 (en) * | 1986-05-09 | 1990-09-19 | Santrade Ltd. | Pelletizing apparatus with a perforated hollow cylinder |
| CN2180330Y (en) * | 1993-11-04 | 1994-10-26 | 吴斌 | High-effect impact crusher |
| CN1929925A (en) * | 2004-03-23 | 2007-03-14 | 杨富茂 | High turbulence mill and its bi-negative pressure turbine |
| CN1562489A (en) * | 2004-04-15 | 2005-01-12 | 杨富茂 | Mechanical turbulence milling tools |
| CN203711107U (en) * | 2014-01-12 | 2014-07-16 | 上海红箭自动化设备有限公司 | Grinding structure of environment-friendly energy-saving type eddy pulverizer |
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