CN101164707B - Classifying system for airflow mill - Google Patents

Classifying system for airflow mill Download PDF

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Publication number
CN101164707B
CN101164707B CN2007100454288A CN200710045428A CN101164707B CN 101164707 B CN101164707 B CN 101164707B CN 2007100454288 A CN2007100454288 A CN 2007100454288A CN 200710045428 A CN200710045428 A CN 200710045428A CN 101164707 B CN101164707 B CN 101164707B
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China
Prior art keywords
main shaft
grading wheel
driving main
plate blade
wheel
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CN2007100454288A
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CN101164707A (en
Inventor
辜程宏
樊旗根
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KENINGDA INDUSTRY Co Ltd NINGBO
Beijing Zhong Ke San Huan High Tech Co Ltd
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KENINGDA INDUSTRY Co Ltd NINGBO
Beijing Zhong Ke San Huan High Tech Co Ltd
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Priority to CN2007100454288A priority Critical patent/CN101164707B/en
Publication of CN101164707A publication Critical patent/CN101164707A/en
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Abstract

The present invention relates to a sorting system of pneumatic mill. It includes sorting wheel, transion chamber and drive main shaft system. The sorting wheel is a plate blade sorting wheel made of wear-resistant metal material, on the plate blade sorting wheel 40-100 slotted eyes are uniformly distributed; the lower end of said transion chamber is connected with plate lamina sorting wheel, its upper end is fixedly connected with drive main shaft, the middle of upper end surface has a projection for preventing material from piling up; the drive main shaft system has a cleaning dust-proofing device, in the cleaning dust-proofing device, between the drive main shaft and mill chamber they are sealed by using screw-seal and gas seal combination, drive main shaft material outlet cleaning is sealed by using labyrinth disk seal and the bearing is sealed by using rotating shaft combination seal. Said invention also provides the working principle of said sorting system and its concrete operation method.

Description

The hierarchy system of airflow milling
Technical field
The present invention relates to a kind of rotation hierarchy system of gas classification device, especially a kind of operation with closed ring collision type fluidized bed jet mill powder is plate blade formula hierarchy system radially.
Background technology
In the prior art; Various grading wheel patents (as: patent No. 89102002 gas flow sizing machines, patent No. CN200420078321.5 micronizer grading wheel assembly, the patent No. 2004201083338 powder nanometer axial flow ends are to vane type grading wheel etc.); All adopt mill chamber interior cleaning disc; The axially staged wheel (Fig. 1,2) structure.
At present, in the powder metallurgy industry, adopting operation with closed ring collision type fluidized bed jet mill (like Fig. 3) both at home and abroad is optimal disintegrating apparatus, and it is by source of the gas part 1, former feed bin 2, and host computer system 3, cyclone system 4, dust collecting system 5, air-introduced machine 6, switch board 7 is formed.Employing air compressor compression high purity inert gas is injected mill body pulverizing district through nozzle with supersonic speed and is pulverized, and passes through the adjustable speed turbine type grading wheel (structure is as shown in Figure 4) of rotation at a high speed then; It comprises grading wheel 10; Bearing purgative gas passage 11, driving main shaft 12, discharging opening 13 etc.; Through the control product granularity, pulverized material is a product through the efficient cyclone separator discharging.In airflow milling, use a grading wheel, carry out classification through the particle diameter of reconciling its rotating speed control comminuting matter, the maximum gauge of limits particle, through the efficient cyclone separator classification, the restriction minimum diameter distributes thereby obtain controlled powder size.Problems such as but in use, exist the grading wheel cost of manufacture high, installation accuracy requires high, and maintenance is inconvenient, and wear-out part is many, advances coarse granule easily, and fault is many.
Summary of the invention
The present invention solves the classification of fine powder raw material in metallurgy, mine, medicine, food, the chemical field in order to have overcome the defective of above-mentioned existence, and a kind of hierarchy system of airflow milling is provided, and these system's fabrication and installation are easy, and fault is few.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of hierarchy system of airflow milling comprises grading wheel, transition chamber, driving main shaft system, is characterized in: grading wheel is the plate blade grading wheel that wear-resisting metal material is processed, and is uniformly distributed with 40~100 slotted eyes on the plate blade grading wheel on the disk; The transition chamber lower end connects the plate blade grading wheel, and the upper end is fixedly connected with driving main shaft; Be provided with the fine powder discharging opening in the driving main shaft.
Has a boss that prevents buildup in the middle of the upper surface of plate blade grading wheel; The driving main shaft system is provided with the cleaning dust guard, cleans in the dust guard between the driving main shaft and mill chamber with helixseal and sealing gland assembly seals; Use the labyrinth disc hermetic seal between driving main shaft and the fine powder discharging opening; Bearing seals with the rotating shaft combination seal.
Plate blade formula hierarchy system of the present invention; Adopt the grading wheel of rotation, the classification air is flowed from the blade ecto-entad against centrifugal direction, stop medium to pass through through the runner between the blade; Through the rotating speed of adjustment motor shaft, reach the order number of desirable sorting powder micro mist.Have that performance is good, precision is high, grading effect is good, can reach more than the orders up to ten thousand, and is of many uses, can be widely used in the classification of fine powder raw material in metallurgy, mine, medicine, food, the chemical field.
The invention has the beneficial effects as follows:
1. the cost of making grading wheel is low, and the airflow milling that especially is fit to 200 types of current trend is used.Because two kinds of grading wheels adopt different manufacturing process, original relatively grading wheel manufacturing cost will reduce half thely, and service life is than originally Duoing one times.
2. the requirement of grading wheel installation accuracy is low, and (common this gap requirement reaches 0.15~0.30mm) with the gap of cleaning flange need not measure grading wheel in the mill chamber interior.
3. be provided with the fine powder discharging opening in the driving main shaft, clean flange to original grading wheel and transfer to the outside, thereby reduced maintenance difficulty, reduce quality accident (coarse granule entering) from fluid bed mill chamber interior; There is not the grading wheel cleaning structure; Therefore the present invention can not grind indoor coarse fodder to be ground and from clean flange and grading wheel gap, get into grading wheel, reduces quality accident.
Description of drawings
Fig. 1 is that existing turbine type grading wheel master cuts open figure;
Fig. 2 is along the A-A cutaway view among Fig. 1;
Fig. 3 is the fluidized bed counter jet mill system flow chart;
Fig. 4 is existing grading wheel hierarchy system commonly used;
Fig. 5 is a structural system cutaway view of the present invention;
Fig. 6 is a transmission shaft system enlarged drawing among Fig. 5;
Fig. 7 is a plate blade grading wheel master cutaway view of the present invention;
Fig. 8 is the vertical view of Fig. 7.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Like Fig. 5, shown in 6, the hierarchy system of a kind of airflow milling of the present invention comprises plate blade grading wheel 20, transition chamber 21, driving main shaft system.
Plate blade grading wheel 20 (like Fig. 7,8) adopts wear-resisting metal material to process, and is uniformly distributed with 40~100 slotted eyes 28 on the 360 degree directions of its disk; Wear boss 29 in the upper end to prevent buildup.
Transition chamber 21 lower ends are fixedly connected plate blade grading wheel 20, and the upper end is fixedly connected with driving main shaft 22.Be provided with fine powder discharging opening 23 in the driving main shaft 22, clean flange to original grading wheel and transfer to the outside, thereby reduced maintenance difficulty, reduce quality accident (coarse granule entering) from fluid bed mill chamber interior; Can save the grading wheel cleaning structure.
Driving main shaft 22 has the cleaning dustproof construction: adopt helixseal and sealing gland assembly seals between driving main shaft 22 and the mill chamber.Adopt labyrinth disc 26 sealing glands between driving main shaft 22 and the fine powder discharging opening 23.Simultaneously, bearing 24 usefulness rotating shaft combination seals 25 sealings.

Claims (3)

1. the hierarchy system of an airflow milling; Comprise grading wheel, transition chamber (21), driving main shaft system; It is characterized in that said grading wheel is the plate blade grading wheel (20) that wear-resisting metal material is processed, be uniformly distributed with 40~100 slotted eyes (28) on the disk of plate blade grading wheel (20); Transition chamber (21) lower end connects plate blade grading wheel (20), and the upper end is fixedly connected with driving main shaft (22); Be provided with fine powder discharging opening (23) in the driving main shaft (22).
2. the hierarchy system of airflow milling according to claim 1 is characterized in that, has a boss (29) that prevents buildup in the middle of the upper surface of said plate blade grading wheel (20).
3. the hierarchy system of airflow milling according to claim 1 is characterized in that, said driving main shaft system is provided with the cleaning dust guard, in the said cleaning dust guard between driving main shaft (22) and the mill chamber with helixseal and sealing gland assembly seals; Between driving main shaft (22) and the fine powder discharging opening (23) with labyrinth disc hermetic seal (26); Bearing seals with rotating shaft combination seal (25).
CN2007100454288A 2007-08-30 2007-08-30 Classifying system for airflow mill Active CN101164707B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007100454288A CN101164707B (en) 2007-08-30 2007-08-30 Classifying system for airflow mill

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Application Number Priority Date Filing Date Title
CN2007100454288A CN101164707B (en) 2007-08-30 2007-08-30 Classifying system for airflow mill

Publications (2)

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CN101164707A CN101164707A (en) 2008-04-23
CN101164707B true CN101164707B (en) 2012-03-07

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102059171B (en) * 2009-11-17 2014-09-24 宁波科宁达工业有限公司 Transmission device of air flow mill grading wheel
CN102080728B (en) * 2009-11-27 2015-09-30 宁波科宁达工业有限公司 A kind of pressurized seal device of transmission shaft
CN101712009B (en) * 2009-12-29 2012-09-19 佛山市南海高达建筑机械有限公司 Top-drive vertical worm impact crusher
CN103191813A (en) * 2013-04-10 2013-07-10 太仓金溪粉碎设备有限公司 Improved jet mill for fluidized bed
CN103203271B (en) * 2013-04-19 2014-10-01 昆山聚贝机械设计有限公司 Dust-proof structure of bearing for classification wheel of jet mill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85102044A (en) * 1985-04-01 1987-01-31 F·L·史密斯公司 Separator
CN1231945A (en) * 1999-01-21 1999-10-20 宁波经济技术开发区中科三环粉体高技术公司 Energy-saving environment protection type collision fluid bed jet mill and process thereof
CN2370958Y (en) * 1999-03-02 2000-03-29 宁波经济技术开发区中科三环粉体高技术公司 Double-grading wheel-type loop running colliding fluidized bed airflow mill
CN201088961Y (en) * 2007-08-30 2008-07-23 宁波科宁达工业有限公司 Classifying system for airflow mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85102044A (en) * 1985-04-01 1987-01-31 F·L·史密斯公司 Separator
CN1231945A (en) * 1999-01-21 1999-10-20 宁波经济技术开发区中科三环粉体高技术公司 Energy-saving environment protection type collision fluid bed jet mill and process thereof
CN2370958Y (en) * 1999-03-02 2000-03-29 宁波经济技术开发区中科三环粉体高技术公司 Double-grading wheel-type loop running colliding fluidized bed airflow mill
CN201088961Y (en) * 2007-08-30 2008-07-23 宁波科宁达工业有限公司 Classifying system for airflow mill

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开平5-208172A 1993.08.20
李凌等.气流磨的国产化探讨.《磁性材料及器件》.1993,第24卷(第1期),38-40. *

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