CN104209193A - Airflow centrifugal classification device for flaky metal micro-powder and ultrafine particles and fragments - Google Patents
Airflow centrifugal classification device for flaky metal micro-powder and ultrafine particles and fragments Download PDFInfo
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- CN104209193A CN104209193A CN201410488091.8A CN201410488091A CN104209193A CN 104209193 A CN104209193 A CN 104209193A CN 201410488091 A CN201410488091 A CN 201410488091A CN 104209193 A CN104209193 A CN 104209193A
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Abstract
The invention discloses an airflow centrifugal classification device for flaky metal micro-powder and ultrafine particles and fragments. The device comprises a rotary cavity into which airflow is introduced from bottom to top, a main shaft, an impeller, a discharge opening and a dedusting pipeline; the edge of the bottom surface of the rotary cavity is provided with the discharge opening; a cover body of which the top is provided with a feeding hole, is arranged above the rotary cavity; the impeller rotates in the cover body of the rotary cavity through the main shaft; the side wall of the rotary cavity is provided with the dedusting pipeline connected with a dust remover along the rotary surface of the impeller. By utilizing different resistances of the airflow to the flaky metal micro-powder and the ultrafine particles and fragments, the influence of the airflow resistance to the motion trail of the flaky powder is increased, so that the flaky metal micro-powder and impurities are successfully separated, and the aim of quick classification is fulfilled; moreover, continuous mass production can be carried out, the production efficiency is high, the flake forming rate of the separated flaky metal soft magnetic micro-powder is high, and the quality consistency of finished products is good.
Description
Technical field
The present invention relates to a kind of centrifugal separating device, be specifically related to a kind of centrifugal classification apparatus of metal fine powder.
Background technology
Along with propelling that is scientific and technical and electronic information technology, near radio electrical communication technology (NFC) developed rapidly in recent years, and the Internet of Things whole world is universal rapidly.REID (RFID) is one of four large core technologies of Internet of Things, it is the core link realizing Internet of Things article identification, and REID must use a kind of flexible magnetic sheet made by bonding agents such as the flakey soft magnetic metal micro mist of thickness below 1 μm and resins.
In flakey soft magnetic metal micro mist manufacture process, the impulsive force being subject to mechanical force due to each metallic particles is variant with the probability be hit, and therefore, the size of its pattern, thickness and sheet there are differences.Through processing, appearance is that granular powder disappears substantially, but the particle of extremely small in raw material (granularity is less than 1 micron), due to be all in other larger particles all the time gap among, therefore the impact being subject to mechanical force is difficult to, still exist, but proportion is very little, is less than 1% (mass ratio).Simultaneously, in the process of long-time processing, when most micro mist reaches requirement, with regard to having only a few micro mist, due to it, to be subject to the impulsive force probability that is large or that be hit of mechanical force high and break, become fragment or chip, its ratio about about 2% (mass ratio).Due to the existence of these and small particle, fragment or chip, by causing the hydraulic performance decline of the flexible magnetic sheet made of micro mist, therefore, must be separated.Because micro mist pattern is sheet, thickness is thin, length and width are large, and average eguivalent granularity is little, can not separate by screen fractionation.
Traditional centrifugal wind classification device is for granular powder, as spherical, block and irregular pellet design, be utilize particle at centrifugal force, gravity is different with the movement locus under air drag acting in conjunction and carry out classification.This device can realize the successful separation of the different particle of density same particle sizes or the close particulate powder of density different grain size, and being separated for the identical flakelike powder of density and fine particle, fragment or chip, just helpless
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provides the air flow centrifuge grading device of a kind of flakey metal fine powder and atomic particle, chip, makes the good separating effect of sheet micro mist and fine-powder.
Technical scheme: the air flow centrifuge grading device of a kind of flakey metal fine powder and atomic particle, chip, comprise convolution cavity, main shaft, impeller, discharge port, the cleaning shaft of the air-flow passed into from the bottom to top, the bottom edge of described convolution cavity is provided with discharge port, for the cover body of charging aperture is offered at top above described convolution cavity, described impeller is rotated in the cover body of convolution cavity by described main shaft, and the surfaces of revolution along described impeller offers at the sidewall of convolution cavity the cleaning shaft connecting deduster.
Along with the High Rotation Speed of impeller, air enters convolution cavity from the bottom to top and forms air-flow, and rises to upper impeller from the below of impeller through the space impeller, sucks in cover body, forms the upper rotational gas flow of High Rotation Speed.Now, micro mist to be fractionated enters cover body from the charging aperture at top.Because the movement velocity of the upper rotational gas flow of High Rotation Speed is higher than the critical dropping velocity of micro mist, give micro mist thrust upwards, stop micro mist sedimentation, therefore, at upper impeller, micro mist is all in suspended state simultaneously.After micro mist movement locus is beyond the circumferential edges of impeller, due to micro mist without air-flow give to lifting force, and air velocity also starts to decline, and therefore, micro mist presents unstable suspended state in the gas flow.When the critical dropping velocity of air velocity lower than micro mist, micro mist will falls downward, so discharge port is passed through in the larger a large amount of sedimentation of flakey micro mist of quality.And atomic particle and chip are when running into cleaning shaft when doing centrifugal motion along with impeller, with the suction of deduster to the motion of cleaning shaft direction, can collect it.
Further, ring-type damping sheet and air inlet positioning disk is also comprised in described convolution cavity, the sidewall bottom of described convolution cavity offers air inlet, being fixed in convolution cavity above air inlet of described ring-type damping sheet level, described air inlet positioning disk extends internally from the below of air inlet, walk around described ring-type damping sheet stretches out above ring-type damping sheet.The air-flow entered from air inlet is by after the passage between ring-type dampened disk and air inlet positioning disk, internally cross the flakey micro mist stream of sedimentation from the periphery of the cavity that circles round between air inlet positioning disk and impeller, so, the flakey micro mist that projected area is larger is just subject to the larger resistance of motion, just settle down near the circumferential edges of impeller, upper surface along air inlet positioning disk glides, and skids off convolution cavity by discharge port.
Further, fine-powder deduster is connect under one section in described cleaning shaft; When above fine-powder arrives fine-powder collector in cleaning shaft, because passage becomes suddenly large, flow velocity significantly declines suddenly, so automatic sedimentation is in fine-powder collector, does not have the less fine-powder of sedimentation then to enter in deduster.
Beneficial effect: present invention utilizes the different resistances of air-flow to sheet micro mist and atomic particle, chip, increase the impact of gas-flow resistance on flakelike powder movement locus, thus achieve flakey metal fine powder and be separated with the success of impurity, reach the object of rapid classification, and can produce in enormous quantities continuously, production efficiency is high, and the flakey soft magnetic metal micro mist scale rate sub-elected is high, and end product quality uniformity is good.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
Embodiment: the air flow centrifuge grading device of a kind of flakey metal fine powder and atomic particle, chip, as shown in Figure 1, main shaft 1, blowpit 2-2, product outlet 2-1, pedestal 3, air inlet positioning disk 4, ring-type damping sheet 4-1, axle sleeve 5, leaf cleaning shaft 7, cover body 8, air inlet 8-1, charging aperture 9, fine-powder collector 10, product collector 11 and convolution cavity is comprised; The cross section of convolution cavity is circular, and top is communicated with the cover body 8 of back taper, and the top of cover body 8 is charging aperture 9.Base and axle sleeve 5 are sleeved on main shaft 1, and main shaft 1 is through center impeller 6 high-speed rotation in cover body 8 of convolution cavity.To offer at sidewall one place of convolution cavity along the surfaces of revolution of described impeller 6 and connect the cleaning shaft 7 of deduster, cleaning shaft 7 wherein connect fine-powder deduster under one section.The bottom edge of convolution cavity offers a place blowpit 2-2, by connecing product collector 11 under product outlet 2-1.A circle air inlet 8-1 is provided with at the sidewall bottom of convolution cavity, ring-type damping sheet 4-1 level fixes above air inlet 8-1, and air inlet positioning disk 4 extends internally between ring-type damping sheet 4-1 and base from the below of air inlet 8-1, walk around ring-type damping sheet 4-1 stretches out above ring-type damping sheet 4-1.
Along with the High Rotation Speed of impeller 6 and the running of deduster, air sucks in convolution cavity from air inlet 8-1 and enters cover body 8 from the bottom to top, and rises to impeller 6 top from the below of impeller 6 through the space impeller 6, forms the upper rotational gas flow of High Rotation Speed.Now, metal fine powder to be fractionated enters cover body 8 from the charging aperture 9 at top.Because the movement velocity of the upper rotational gas flow of High Rotation Speed is higher than the critical dropping velocity of micro mist, stop micro mist sedimentation, therefore, on impeller 6 top, micro mist is all in suspended state.When the critical dropping velocity of air velocity lower than micro mist, micro mist will falls downward, so a large amount of sedimentation of flakey micro mist that quality is larger, now, the air-flow entered from air inlet 8-1 is through after the passage ring-type damping sheet 4-1 and air inlet positioning disk 4, the micro mist stream of landing is internally crossed from the periphery of convolution cavity, the flakey micro mist that projected area is larger is just subject to the larger resistance of motion, settle down near the circumferential edges of impeller 6, along the inclined-plane of air inlet positioning disk 4 slip down to disk pedestal 3 upper domatic on, continue to slip down in the blowpit 2-2 on chassis, because blowpit 2-2 tilts, along with vibrations when main shaft 1 runs up, flakey metal fine powder finally enters product collector 11 by product outlet 2-1.Because atomic particle, fragment and chip quality are little, be suspended in air-flow upper strata, cleaning shaft 7 is met when circular motion, suction with deduster moves along cleaning shaft 7 direction, when above it arrives fine-powder collector 10, because passage becomes suddenly large, flow velocity significantly declines suddenly, so be deposited in fine-powder collector 10, the less fine-powder of sedimentation is not had then to enter in deduster.
When particle circles around a certain center of circle in atmosphere, it is subject to gravity, centrifugal force, centripetal force, air drag and inertia force effect.Centrifugal force is contrary with centripetal force direction, equal and opposite in direction, and when centripetal force is less than centrifugal force, particle throws away as parabolic motion, and the distance of motion is relevant with inertia force and resistance.When gas-flow resistance is less than inertia force, particle will move forward; When gas-flow resistance be greater than, equal inertia force time, particle just no longer travels forward, but becomes the movement of falling object under gravity.Micro mist, when impeller 6 top, although be in suspended state, does not nearly all circle, but screw, except being subject to gravity, be also subject to the effect of inertia force and gas-flow resistance.After it flies out overhead, impeller 6 edge, air resistance is made up of two parts, a part is that the air-flow that formed as the air of medium is to its resistance, another part is the resistance of air-flow that the air introduced from air inlet 8-1 is formed, and the direction of this resistance is contrary with the direction of air-flow out above impeller 6.This two gas-flow resistances and gravity, these three power make a concerted effort by determine its institute energy reach impeller 6 center ultimate range.Gas is directly proportional to the projected area of powder in air motion direction to the resistance of powder, to square being directly proportional of air velocity.When to be processed into thickness be the equal-volume disk of 0.5 microns for the spheric granules of particle diameter 20 microns (raw material granularity before processing), the area of this disk is about about 60 times of spheric granules projection.Sheet micro mist, in the projection of the direction of motion of air-flow, equals the area of sheet time maximum, under normal circumstances, its projected area is only the part of sheet area.That is, the micro mist of same quality, the gas-flow resistance that be subject to of sheet micro mist when moving is several times of spherical micro mist to tens times.Therefore, the present invention considers the effect of gas-flow resistance, by introducing the mode of air-flow, increases the impact of gas-flow resistance on scale like powder movement locus, thus achieves flakey metal fine powder and be separated with the success of chip with atomic particle, fragment.
As mentioned above, although represented with reference to specific preferred embodiment and described the present invention, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (3)
1. the air flow centrifuge grading device of a flakey metal fine powder and atomic particle, chip, it is characterized in that: the convolution cavity, main shaft, impeller, discharge port, the cleaning shaft that comprise the air-flow passed into from the bottom to top, the bottom edge of described convolution cavity is provided with discharge port, for the cover body of charging aperture is offered at top above described convolution cavity, described impeller is rotated in the cover body of convolution cavity by described main shaft, and the surfaces of revolution along described impeller offers at the sidewall of convolution cavity the cleaning shaft connecting deduster.
2. the air flow centrifuge grading device of flakey metal fine powder according to claim 1 and atomic particle, chip, it is characterized in that: in described convolution cavity, also comprise ring-type damping sheet and air inlet positioning disk, the sidewall bottom of described convolution cavity offers air inlet, being fixed in convolution cavity above air inlet of described ring-type damping sheet level, described air inlet positioning disk extends internally from the below of air inlet, walk around described ring-type damping sheet stretches out above ring-type damping sheet.
3. the air flow centrifuge grading device of flakey metal fine powder according to claim 1 and atomic particle, chip, is characterized in that: connect fine-powder deduster under one section in described cleaning shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410488091.8A CN104209193B (en) | 2014-09-22 | 2014-09-22 | The air flow centrifuge grading device of flakey metal fine powder and atomic particle, chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410488091.8A CN104209193B (en) | 2014-09-22 | 2014-09-22 | The air flow centrifuge grading device of flakey metal fine powder and atomic particle, chip |
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| CN104209193A true CN104209193A (en) | 2014-12-17 |
| CN104209193B CN104209193B (en) | 2016-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789425A (en) * | 2016-08-09 | 2019-05-21 | 佐竹化学机械工业株式会社 | Stage division and device |
| CN110681502A (en) * | 2019-10-15 | 2020-01-14 | 中石化川气东送天然气管道有限公司 | Cyclone separator |
| CN110743790A (en) * | 2019-10-25 | 2020-02-04 | 安徽金寨乔康药业有限公司 | Ganoderma lucidum spore powder airflow grading equipment |
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| CN86108387A (en) * | 1986-12-13 | 1988-06-08 | 国家建筑材料工业局科学技术开发服务中心 | propeller type centrifugal powder selecting machine |
| CN2390699Y (en) * | 1999-10-20 | 2000-08-09 | 徐家驹 | Eninforced eddy-current sorter |
| RU2179893C2 (en) * | 2000-01-24 | 2002-02-27 | Бийский технологический институт Алтайского государственного технического университета им. И.И. Ползунова | Centrifuge |
| CN1935395A (en) * | 2005-09-19 | 2007-03-28 | 夏纪勇 | Coarse particle separator |
| CN201313069Y (en) * | 2008-11-27 | 2009-09-23 | 江苏牧羊集团有限公司 | Sorting mechanism of ultra-fine pulverizer |
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2014
- 2014-09-22 CN CN201410488091.8A patent/CN104209193B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86108387A (en) * | 1986-12-13 | 1988-06-08 | 国家建筑材料工业局科学技术开发服务中心 | propeller type centrifugal powder selecting machine |
| CN2390699Y (en) * | 1999-10-20 | 2000-08-09 | 徐家驹 | Eninforced eddy-current sorter |
| RU2179893C2 (en) * | 2000-01-24 | 2002-02-27 | Бийский технологический институт Алтайского государственного технического университета им. И.И. Ползунова | Centrifuge |
| CN1935395A (en) * | 2005-09-19 | 2007-03-28 | 夏纪勇 | Coarse particle separator |
| CN201313069Y (en) * | 2008-11-27 | 2009-09-23 | 江苏牧羊集团有限公司 | Sorting mechanism of ultra-fine pulverizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109789425A (en) * | 2016-08-09 | 2019-05-21 | 佐竹化学机械工业株式会社 | Stage division and device |
| CN110681502A (en) * | 2019-10-15 | 2020-01-14 | 中石化川气东送天然气管道有限公司 | Cyclone separator |
| CN110681502B (en) * | 2019-10-15 | 2023-12-05 | 中国石油化工股份有限公司 | Cyclone separator |
| CN110743790A (en) * | 2019-10-25 | 2020-02-04 | 安徽金寨乔康药业有限公司 | Ganoderma lucidum spore powder airflow grading equipment |
| CN110743790B (en) * | 2019-10-25 | 2020-10-27 | 安徽金寨乔康药业有限公司 | Ganoderma lucidum spore powder airflow grading equipment |
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| Publication number | Publication date |
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| CN104209193B (en) | 2016-05-25 |
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Address after: 212213 Henan Bridge, Yangtze East Road, Sanmao Street, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee after: Jiangsu Bona Electromagnetic New Materials Co., Ltd. Address before: 212213 Henan Bridge, Yangtze East Road, Sanmao Street, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee before: Zhenjiang Baona Electromagnetic New Material Co., Ltd. |