CN207840135U - A kind of open atomizer - Google Patents
A kind of open atomizer Download PDFInfo
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- CN207840135U CN207840135U CN201721783421.1U CN201721783421U CN207840135U CN 207840135 U CN207840135 U CN 207840135U CN 201721783421 U CN201721783421 U CN 201721783421U CN 207840135 U CN207840135 U CN 207840135U
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Abstract
The utility model is related to a kind of open atomizers.Atomizer described in the utility model include be sequentially connected connect let slip a remark, upper cover, pedestal, it is characterized in that, the pedestal is equipped with air inlet, the upper cover matches to form high pressure gas chamber and jet channel with pedestal, the air inlet is connected to the high pressure gas chamber and jet channel, the inside let slip a remark includes the water conservancy diversion contraction section, centre bore, expansion expansion arc of transition and linkage successively, wherein the cross section of the water conservancy diversion contraction section is gradually reduced from top to bottom；The cross section of the central hole is at the internal cross section minimum of leting slip a remark；The cross section of the expansion expansion arc is gradually expanded from top to bottom.The utility model can change different gas/liquid speed ratios by extension elongation that flexible modulation is let slip a remark, effectively improve gas effciency, reduce stifled stove rate, improve product fine powder rate.
Description
Technical field
The utility model is related to nebulizer technologies field more particularly to a kind of open atomizations prepared for metal-powder
Device.
Background technology
EIGA technologies (no crucible induction melting vacuum gas-atomized powder technology) carry out metal powder using open atomizer
The preparation of body.EIGA is adapted to activity, the melting of refractory metal, atomization, and using open atomizer, molten drop is opened from top of leting slip a remark
Begin to enter atomizer under the double action of negative pressure and gravity, stove phenomenon blocked up to reduce metallic solution, and make metal-powder not by
It is polluted to impurity.
The effect of EIGA technology atomized metal pow ders is mainly influenced by both sides factor, i.e., high gas-liquid flow-rate ratio and
High gas-liquid speed ratio.Under the premise of the other sizes of atomizer determine, the different extension elongations let slip a remark will significantly affect mist
Gas-liquid speed ratio during change.When extension elongation of leting slip a remark is larger, high pressure gas theory joint moves down, and gas is touching
Farther out, energy loss is larger for the distance flown before metallic solution, and gas velocity reduces, while with gas-liquid joint position
It moves down, the speed of molten drop freely falling body to the position becomes larger, and two aspect factors cause to be atomized gas liquid ratio reduction, are unfavorable for melting
Drop is broken.But some researches show that extension elongation of leting slip a remark in a certain range is longer, is conducive to form negative pressure at tip outlets
Area, the formation of negative pressuren zone has forms continuous flow conducive to metal.When extension elongation of leting slip a remark is shorter, gas energy loses small, gas
Liquid speed degree is bigger, is conducive to the broken of metal drop.But blowback phenomenon is also easy to produce at tip outlets at this time, or even forms positive pressure
Area causes seriously to block up stove phenomenon, can not continuous production.
Therefore, under design background of the current atomizer in integral structure, it is necessary to propose a kind of new atomizer, so as to
The extension elongation let slip a remark by flexible modulation changes different gas/liquid speed ratios and optimizes the orificed tip of atomizer.
Utility model content
In view of the above-mentioned problems, the utility model is intended to provide a kind of open atomizer, let slip a remark with will pass through flexible modulation
Extension elongation change different gas/liquid speed ratios and optimize the orificed tip of day with fog.
The utility model provides a kind of open atomizer, the atomizer include be sequentially connected connect let slip a remark, upper cover, bottom
Seat, which is characterized in that the pedestal is equipped with air inlet, and the upper cover is matched with pedestal to be formed high pressure gas chamber and jet and lead to
Road, the air inlet are connected to the high pressure gas chamber and jet channel, and the inside let slip a remark includes transition and linkage successively
Water conservancy diversion contraction section, centre bore, expansion expansion arc, wherein the cross section of the water conservancy diversion contraction section is gradually reduced from top to bottom；It is described
The cross section of central hole is at the internal cross section minimum of leting slip a remark；The cross section of the expansion expansion arc is gradual from top to bottom
Expand.
Above-mentioned open atomizer, the chamfered shape in longitudinal cross-section of the water conservancy diversion contraction section.
The longitudinal cross-section of above-mentioned open atomizer, the expansion expansion arc is tapered.
Above-mentioned open atomizer, it is described let slip a remark, upper cover, pedestal are connected by tabletting structure.
Above-mentioned open atomizer is provided with gasket at the horizontal connecting surface let slip a remark with upper cover.
Above-mentioned open atomizer, the air inlet use the intake method tangent with the high pressure gas chamber.
Above-mentioned open atomizer is equipped with the 2-6 air inlets on the base.
Above-mentioned open atomizer, venthole is designed on the upper lid, and the venthole is connected to the high pressure gas
Chamber simultaneously extends to the link position let slip a remark between upper cover, and the link position is equipped with the surge chamber being connected and tonifying Qi
Channel, the outlet of the air supply passage is towards the exit of the expansion expansion arc.
The cross section of above-mentioned open atomizer, the jet channel first reduces again gradually increasing from entrance to ejiction opening
Greatly.
Above-mentioned open atomizer, the jet channel are convergent-divergent channel structure.
Atomizer is designed as the open separate structure of tabletting connection by the utility model, can be let slip a remark by flexible modulation
Extension elongation changes different gas/liquid speed ratios, effectively improves gas effciency, reduces stifled stove rate, it is thin to improve product
Powder rate.
Description of the drawings
Fig. 1 is the open atomizer structure schematic diagram of the utility model；
Fig. 2 is the utility model tonifying Qi modular structure schematic diagram；
Fig. 3 is the utility model orificed tip schematic diagram；
Fig. 4 is the utility model metal powder micro-structure diagram.
Specific implementation mode
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when the embodiment of the utility model and various aspects.However, specific implementations described below side
Formula and embodiment are for illustrative purposes only, rather than limitations of the present invention.
The utility model provides a kind of open atomizer, as shown in Figure 1, the atomizer includes being sequentially connected the leakage connect
Mouth 1, upper cover 2, pedestal 3.The pedestal 3 is equipped with air inlet 31, and the upper cover 2 matches to form high pressure gas chamber 4 with pedestal 3
With jet channel 5, the air inlet 31 is connected to the high pressure gas chamber 4 and jet channel 5.
As shown in Fig. 1 or 3, it is described let slip a remark 1 inside include the water conservancy diversion contraction section 11 of transition and linkage successively, centre bore 12,
Expand expansion arc 13.Wherein, the cross section of the water conservancy diversion contraction section 11 is gradually reduced from top to bottom.Cross at the centre bore 12
Section is at the 1 internal cross section minimum of leting slip a remark.The cross section of the expansion expansion arc 13 is gradually expanded from top to bottom.
The utility model, which is let slip a remark, 1 can be used red copper material, and red copper material using effect will be substantially better than brass and stainless steel
Material.Red copper material fusing point is higher, nonmagnetic, has heat conductivility more better than stainless steel and heat resistance.And brass fusing point
Relatively low, heat conductivility is worse than red copper material.In EIGA technologies, atomizer lets slip a remark top to the distance 20-40mm of induction coil,
Using red copper material, can effectively avoid high temperature in the induction effect and working chamber of induction coil, there are heat transfer phenomenons, will leak
Mouth heating is deformed.
As shown in figure 3, let slip a remark 1 water conservancy diversion contraction section 11 use chamfer design, chamfer radius R1.The centre bore 12 let slip a remark
Position is its most narrow position, diameterThe expansion expansion arc 13 let slip a remark stretches out pedestal 3, extension elongation L1, angle
For α.
In EIGA technical process, after prealloy bar is melted in working chamber, is formed under negative pressure and gravity and stablize company
Continuous metal liquid stream or drop, molten drop reaches after 1 water conservancy diversion contraction section 11 of leting slip a remark, centre bore 12, expansion expansion arc 13 lets slip a remark 1
Outlet is crushed then under high-pressure inert gas effect, is condensed into metal powder.Drop through leting slip a remark 1 during, each portion
It is allocated as with as described below.
In water conservancy diversion contraction section 11：Mainly there are two effects for water conservancy diversion contraction section 11, first, realizing leading for working chamber's make-up gas
Stream acts on.The phenomenon that there are molten drop blowbacks in atomization process, to solve the problems, such as this, need to ensure working chamber and atomization bucket it
Between there are certain positive pressure, i.e. the working chambers P-P is atomized bucket=50-300mbar.Therefore, making-up air device is designed in working chamber.It lets slip a remark
1 upper design chamfering is conducive to gas and enters atomizer by central passage of leting slip a remark, and makes up the negative pressure of atomizer nozzle lower end, has
Conducive to reduction blowback phenomenon, while the indoor tonifying Qi design of melting can also make inert gas molten to metal by chamfering drainage
Drop plays the role of certain force, and metal drop will not shift when all directions uniform force.It lets slip a remark and uses chamfer design, formed
Contraction structure, another effect be when metal drop fall entrance let slip a remark after, in working chamber under the action of gas, metal drop
Has the tendency that contraction.Molten drop starts to expand after entering expansion segment of leting slip a remark in this way, before touching high pressure gas, voluntarily breaks
It is broken into smaller contact drop, is conducive to metal drop finished breaking effect.
In centre bore 12：The position of centre bore 12 is the diameter of centre bore 12 where leting slip a remark the most narrow position in cross section
Size influences gas-liquid contact distance and drop by the preliminary crushing effect after 1 of leting slip a remark.12 diameter of centre boreWhen larger,
Farther out, there are more energy losses before broken metal drop for gas, therefore reduce the diameter of centre bore 12 for gas-liquid distanceBe conducive to the broken of metal drop, but center-hole diameterWhen smaller, the stability of atomization process by bar and
The concentricity of bar clamp structure is affected.When the concentricity of bar and bar clamp structure is less than 1mm, it is ensured that atomization
Process is stable, is carried out continuously.When the concentricity of bar and bar clamp structure is poor, it is also easy to produce wall built-up and stifled stove phenomenon, it is raw
Producing cost and production efficiency reduces.The utility model design lets slip a remark center-hole diameter as 10-30mm.
In expansion expansion arc 13：The longitudinal cross-section of the expansion expansion arc 13 is tapered.The metal at expansion expansion arc 13
Swelling occurs under surface tension effects for drop, and the expansion of molten drop causes it to be tentatively broken into smaller liquid
Drop.The major parameter of expansion expansion arc 13 has extension elongation L1 and angle α.The size of extension elongation L1 directly determines atomization
The position that 1 lower section gas/liquid of device nozzle crosses.When extension elongation L1 is larger, the gas/liquid position that crosses moves down, and gas and molten drop need
It could be crushed by certain flying distance, during this, gas energy has loss, and gas velocity weakens, and molten drop
Free-falling distance is remoter, and speed is bigger, and air-liquid speed ratio declines, and is unfavorable for the crushing effect of metal drop, metal-powder
In fine powder rate reduce.The size of angle α also influences the state at metal drop arrival atomizer exit.When angle α is larger,
The self-excitation expansion for being conducive to molten drop is conducive to be broken into smaller drop, but when angle α is excessive simultaneously, gas-liquid away from
From farther out, gas need to fly before colliding with molten drop at a distance from farther out, energy loss is big, final gas-liquid speed ratio drop
It is low, it is unfavorable for the broken of metal drop.When angle α is smaller, gas-liquid flying distance shortens, and gas energy utilization rate is high, is conducive to
Molten drop it is broken, but when angle α is smaller be unfavorable for the self-excitation crushing effect of molten drop, and be also easy to produce the wind that wall built-up blocks up stove
Danger.It is 15-25mm that the utility model, which designs extension elongation L1, and angle α is 10-20 °.
The upper cover 2 of the utility model uses stainless steel with pedestal 3.Let slip a remark 1, upper cover 2, pedestal 3 passes through tabletting structure
Connection.It is provided with gasket at 1 horizontal connecting surface with upper cover 2 of leting slip a remark.Extension elongation of leting slip a remark can by add gasket come
It realizes, spacer thickness has 0.1mm, 0.2mm, spacer height to can reach 0.1mm-0.8mm.It is let slip a remark by changing spacer height realization
The adjusting of 1 extension elongation, the adjusting for 1 extension elongation of leting slip a remark are actually to change the position that crosses of high pressure gas and metal drop
It sets.
As shown in Figure 1, upper cover 2 is assembled to form high pressure gas chamber 4, jet channel 5 etc. with pedestal 3.Gas inlet 31
On pedestal 3,2-6 air inlet 31 is designed.Air inlet 31 is by the way of tangential admission.Using tangential admission mouth, high pressure
Gas enters gas chamber's rear screw and accelerates, and advantageously forms high pressure gas and is crushed metal drop.The atomizer designs larger
High pressure gas chamber 4, high pressure gas enter of short duration storage after high pressure gas chamber 4, are conducive to evenly into subsequent narrow
Jet channel 5 is stitched, to reduce the generation of turbulent flow.High pressure gas enters slit jet channel 5 after the storage of high pressure gas chamber 4,
The structure of slit jet channel 5 is similar to convergent-divergent channel structure, is so designed with the acceleration conducive to gas.Jet channel 5 is first received
Contracting further expansion, gas reach velocity of sound in the venturi position for reaching slit, and high pressure gas reaches supersonic speed after narrow-gap channel.Such as
Shown in Fig. 1, the angle γ of upper cover is designed as 35-50 °, and the angle β of pedestal 3 is designed as 20-30 °.The jet apex angle of jet channel 5
Size is between β and γ.
As shown in Figure 1, in 2 structure of upper cover, the venthole 21 of a 0.2-1mm is designed.The venthole 21 is connected to institute
It states high pressure gas chamber 4 and extends to the link position let slip a remark between 1 and upper cover 2, the link position, which is equipped with, to be connected
Surge chamber 6 and air supply passage 7, the outlet of the air supply passage 7 is towards the exit of the expansion expansion arc 13.
After high pressure gas enters high pressure gas chamber 4, most of gas reaches jet expansion, atomization along jet channel 5
Broken metal drop.Meanwhile a small amount of gas is by the small venthole 21 that is designed in upper cover 2, into leting slip a remark between 1 and upper cover 2
Link position.Surge chamber 6 and air supply passage 7, a diameter of 0.2-1mm of air supply passage 7 are designed in the link position.The tonifying Qi is logical
The effect in road 7 is to prevent metal powder because of wall built-up phenomenon caused by the reasons such as blowback.In atomization process, there are a small amount of metal powders
Last blowback phenomenon.The molten metal powder of blowback adheres to lower end i.e. metal drop of leting slip a remark and exports, and a large amount of blowback phenomenon can be led
Serious wall built-up phenomenon is caused, or even stifled stove risk can be increased.The venthole 21 and air supply passage 7 of the utility model design can be according to mists
Change actual conditions and carries out opening and closing operation.When there are blowback, wall built-up, stifled stove, tonifying Qi module 8 is removed, ventilation is opened
Hole 21 and air supply passage 7.The structure of tonifying Qi module 8 is as shown in Fig. 2, for filling surge chamber 6 and air supply passage 7.
After the jet expansion for leaving atomizer jet channel 5, high-voltage high-speed gas starts to expand.Using the pedestal of the design
3 structures, high-voltage high-speed gas can expand in relatively small range, and in the range closer apart from metal drop, high pressure is high
The energy that fast gas loses due to diffusion because expanding is relatively low, is conducive to broken molten drop, forms refining metallic powder.Pedestal 3
Angle β 1 is designed as 80-100 °, and bevel altitude L2 is designed as 10-20mm.
Atomizer is designed as the open separate structure of tabletting connection by the utility model, can be let slip a remark by flexible modulation
Extension elongation changes different gas/liquid speed ratios, effectively improves gas effciency, reduces stifled stove rate, it is thin to improve product
Powder rate.
Following embodiment is under the premise of ensureing that melting, atomization process are identical, the height for the gasket that can be let slip a remark by adjusting, with
Different influences of the extension elongation to 0-53 μm of flour extraction of metal powder product and Granularity Distribution and apparent density of leting slip a remark of verification.
Monitor system 10-40Kw, prealloy bar feed speed 20-70mm/min, atomizing pressure 20-50bar, gas stream
850-1500NM3/H, 30-40 DEG C of hot gas temperature are measured, the pressure difference between working chamber and atomization bucket is 50-300mbar, prealloy
Diameter of rod 30-70mm.
Embodiment 1
Copper mouth spacer height is：+0.2mm
The flour extraction of 0-53 μm of granularity：32%
Apparent density：2.33g/cm3
Size distribution see the table below：
Embodiment 2
Copper mouth spacer height is：+0.4mm
The flour extraction of 0-53 μm of granularity：38%
Apparent density：2.32g/cm3
Size distribution see the table below：
Can be obtained by comparing above-described embodiment, when the height of copper mouth gasket is+0.2mm, metal powder granularity compared with+
The granularity of powder is thicker when 0.4mm.It is more connect when the position ratio+0.2mm that high pressure gas crosses when copper mouth spacer height is+0.4mm
Nearly molten drop outlet, therefore high pressure gas flying distance is shorter, air-loss energy is less, and under metal drop freely falling body
Distance Shortened is dropped, speed when molten drop contact high pressure gas is reduced, advantageously forms larger gas-liquid speed ratio, be conducive to gold
Belong to the broken of drop and forms more fine powder.The flour extraction of 0-53 μm of fine powder of 3D printing is reachable when copper mouth spacer height is+0.4mm
To 38%.
Meanwhile metal powder sphericity can reach 90%, satellite ball is few, thus copper mouth spacer height be+0.2mm and+
When 0.4mm, apparent density is respectively 2.33g/cm3 and 2.32g/cm3, is not much different.
The microstructure of metal powder from figure as shown in figure 4, find out that powder has preferable sphericity, satellite ball is less, powder
Last any surface finish, powder have good flow performance.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And it does not limit the embodiments.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among changes and variations that derived from are still in the scope of protection of the utility model.
Claims (10)
1. a kind of open atomizer, the atomizer include be sequentially connected connect let slip a remark, upper cover, pedestal, which is characterized in that institute
It states pedestal and is equipped with air inlet, the upper cover matches to form high pressure gas chamber and jet channel with pedestal, and the air inlet connects
It includes the water conservancy diversion contraction section of transition and linkage successively, center to lead to the high pressure gas chamber and jet channel, the inside let slip a remark
Hole, expansion expansion arc, wherein
The cross section of the water conservancy diversion contraction section is gradually reduced from top to bottom；
The cross section of the central hole is at the internal cross section minimum of leting slip a remark；
The cross section of the expansion expansion arc is gradually expanded from top to bottom.
2. open atomizer according to claim 1, which is characterized in that the longitudinal cross-section of the water conservancy diversion contraction section is in
Angular shape.
3. open atomizer according to claim 1, which is characterized in that the longitudinal cross-section of the expansion expansion arc is in cone
Shape.
4. open atomizer according to claim 1, which is characterized in that it is described let slip a remark, upper cover, pedestal pass through tabletting knot
Structure connects.
5. open atomizer according to claim 1, which is characterized in that in the horizontal connecting surface let slip a remark with upper cover
Place is provided with gasket.
6. open atomizer according to claim 1, which is characterized in that the air inlet uses and the high pressure gas
The tangent intake method of chamber.
7. open atomizer according to claim 1, which is characterized in that be equipped on the base 2-6 it is described into
Gas port.
8. open atomizer according to claim 1, which is characterized in that it is designed with venthole on the upper lid, it is described
Venthole is connected to the high pressure gas chamber and extends to the link position let slip a remark between upper cover, and the connection position installs
There are a surge chamber and air supply passage being connected, the outlet of the air supply passage is towards the exit of the expansion expansion arc.
9. open atomizer according to claim 1, which is characterized in that the cross section of the jet channel from entrance extremely
Ejiction opening first reduces again gradually increase.
10. open atomizer according to claim 1, which is characterized in that the jet channel is convergent-divergent channel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721783421.1U CN207840135U (en) | 2017-12-19 | 2017-12-19 | A kind of open atomizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721783421.1U CN207840135U (en) | 2017-12-19 | 2017-12-19 | A kind of open atomizer |
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| Publication Number | Publication Date |
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| CN207840135U true CN207840135U (en) | 2018-09-11 |
Family
ID=63421361
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721783421.1U Active CN207840135U (en) | 2017-12-19 | 2017-12-19 | A kind of open atomizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181067A (en) * | 2019-07-08 | 2019-08-30 | 华南理工大学 | A kind of combined type gas-atomized powder equipment |
| CN110480023A (en) * | 2019-09-06 | 2019-11-22 | 飞而康快速制造科技有限责任公司 | Manufacture powder atomizer and nozzle and manufacture powder atomization method |
| CN112091226A (en) * | 2020-10-29 | 2020-12-18 | 佛山市中研非晶科技股份有限公司 | Stable form injection apparatus |
-
2017
- 2017-12-19 CN CN201721783421.1U patent/CN207840135U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110181067A (en) * | 2019-07-08 | 2019-08-30 | 华南理工大学 | A kind of combined type gas-atomized powder equipment |
| CN110480023A (en) * | 2019-09-06 | 2019-11-22 | 飞而康快速制造科技有限责任公司 | Manufacture powder atomizer and nozzle and manufacture powder atomization method |
| CN112091226A (en) * | 2020-10-29 | 2020-12-18 | 佛山市中研非晶科技股份有限公司 | Stable form injection apparatus |
| CN112091226B (en) * | 2020-10-29 | 2024-05-28 | 佛山中研磁电科技股份有限公司 | Stable spraying device |
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