CN206605034U - Aerosolization nozzle and gas atomization device - Google Patents
Aerosolization nozzle and gas atomization device Download PDFInfo
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- CN206605034U CN206605034U CN201720081066.7U CN201720081066U CN206605034U CN 206605034 U CN206605034 U CN 206605034U CN 201720081066 U CN201720081066 U CN 201720081066U CN 206605034 U CN206605034 U CN 206605034U
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Abstract
The utility model is related to a kind of aerosolization nozzle and gas atomization device.The aerosolization nozzle includes being provided with gas channel and fluid course in body, the body；The body has the first face and the second face that are oppositely arranged, and the fluid course, which has, to be opened in the import in first face and be opened in the outlet in second face；The gas channel includes inlet channel, air cavity and the outlet passageway set gradually along airflow direction；The quantity of the outlet passageway is at least two, and each outlet passageway is set around the fluid course successively, and the gas outlet for surrounding the outlet successively is formed in second face.The yield of the tiny metal dust of size that the aerosolization nozzle is prepared is high.Meanwhile, using spray ring structure, air-flow is uniform compared with spray orifice, it is ensured that the metal dust prepared obtains the surface topography of preferable particle size and particle during double atomization.
Description
Technical field
The utility model is related to aerosolizing device, more particularly to aerosolization nozzle and gas atomization device.
Background technology
In recent years, 3D printing technique develops rapidly due to can directly produce complicated shape part, in Aero-Space, health
The fields such as medical treatment, automobile, art, building are applied.
3D printing requires that metal dust has good sphericity, narrow particle size distribution (size distribution is between 15~53 μm), oxygen
The features such as content is low, good fluidity.Ripe technology is all gas atomization production metal dust now, the atomization of aerosolization technology
Focus on the design of atomizer, the aerosolization nozzle used now is designed using single spray ring or spray orifice, this
The design of sample can only carry out atomization once, or the atomization in a focus in atomization process, and this is for 3D printing
It is unfavorable for metal dust.The size of bulky grain is easily produced in atomization process, the size of these bulky grains can not
Used using existing 3D printing technique, the utilization to material is insufficient.Such as these large-sized particles are returned
Stove remelting, then carries out secondary atomization process again, and this is all and its unfavorable for cost and powder：First, being returned
Stove re melting process, can inherently increase the production cost of metal dust；Second, melt down the metal dust after processing into branch's ratio
Relatively it is difficult to control to, the increase for especially melting down the oxygen content of processing can be than more serious, and this is for the strict control oxygen content of some needs
Metal dust for be fatal.In addition, as used higher atomizing pressure to ensure molten metal at atomizer once
Property complete atomization, allow the molten metal of melting to be dispersed into tiny molten drop under the impact of high-speed gas, and in subsequent mist
Change the nodularization that correlation is completed in tower and process of setting, the fine powder recovery rate of this method is relatively low, will greatly increase metal dust
Production cost, be also unfavorable for the quick acquisition of 3D printing metal dust, and atomizing pressure requirement of the increase to equipment compared with
Height, this is not only a kind of burden in equipment cost, also has more harsh requirement to the care and maintenance in later stage.
Utility model content
Based on this, it is necessary to provide a kind of without additionally increasing atomizing pressure, can also obtain the gas of higher fine powder recovery rate
Atomizer.
Gas channel and fluid course are provided with a kind of aerosolization nozzle, including body, the body；The body has
The first face and the second face being oppositely arranged, the fluid course have the import for being opened in first face and are opened in described the
The outlet in two faces；
The gas channel includes inlet channel, air cavity and the outlet passageway set gradually along airflow direction；The outlet
The quantity of passage is at least two, and each outlet passageway is set around the fluid course successively, and in the dihedron
Into the gas outlet for surrounding the outlet successively；
Air-flow is entered after the air cavity by the inlet channel, is sprayed by the gas outlet and is formed atomization focus.
Above-mentioned aerosolization nozzle, sets at least two outlet passageways, and the outlet passageway surrounds the liquid successively
Circulation road is set, and is consequently formed the structure of at least two spray rings, the structure can form multiple atomization focuses.Preparing metal dust
When, molten metal is broken up in the first atomization focal point by gas, forms certain metal liquid film and certain metal dust, Ran Hou
Second is reached under the carrying of high velocity air and is atomized focus so that metal liquid film or uncooled metal dust complete secondary
Impact, so that metal liquid film or metal dust are become into more tiny metal dust, and then completes the multi-atomizing mistake of molten metal
Journey, without Additional pressurizations, can also make the yield of the tiny metal dust of the size prepared high.Meanwhile, using spray ring knot
Structure, air-flow is uniform compared with spray orifice, it is ensured that the metal dust prepared obtains preferable particle chi during double atomization
Very little and particle surface topography.
In one of the embodiments, the atomization focus is respectively positioned on the axis of the fluid course.It is possible thereby to
More preferable atomizing effect is obtained, optimizes the size of metallic particles and the surface topography of particle.
In one of the embodiments, the outlet passageway includes the first outlet passageway and the second outlet passageway, and in institute
State the second face and form the first gas outlet and the second gas outlet for surrounding the outlet successively；First gas outlet goes out described in being located at
Between mouth and the second gas outlet.
In one of the embodiments, first outlet passageway and the second outlet passageway are set around the fluid course
Put, and the axis of first outlet passageway and the second outlet passageway is overlapped with the axis of the fluid course.
In one of the embodiments, first outlet passageway includes the first contraction set gradually along airflow direction
Section, the first throat and the first diffuser；On the longitudinal section of first outlet passageway, first contraction section is in Vito octyl group
Shaped form is continuously shunk, and first throat is in isometrical linear, and first diffuser is in that oval axial symmetry bit stream formula is linear,
And the port of export of the port of export of first throat to first diffuser is incremented by for continuously smooth.
In one of the embodiments, between the center line of first diffuser and the axis of the fluid course
Angle α is 10~30 °.
In one of the embodiments, second outlet passageway includes the second contraction set gradually along airflow direction
Section, the second throat and the second diffuser；On the longitudinal section of second outlet passageway, second contraction section is in Vito octyl group
Shaped form is continuously shunk, and second throat is in isometrical linear, and second diffuser is in that oval axial symmetry bit stream formula is linear,
And the port of export of the port of export of second throat to second diffuser is incremented by for continuously smooth.
In one of the embodiments, between the center line of second diffuser and the axis of the fluid course
Angle β is 15~25 °.
In one of the embodiments, second face includes depressed part, and the depressed part is included parallel to described first
The bottom surface in face and the side set around the bottom surface；The outlet is arranged at the bottom surface, first gas outlet and the
Two gas outlets are arranged at the side.
Further the structure to the first outlet passageway and/or the second outlet passageway is rationally controlled, and can optimize to be formed
Metallic particles size and the surface topography of particle.
In one of the embodiments, in addition to graphite cannula；The graphite cannula, which has, to be embedded in the fluid course
Hollow body, and it is resisted against the butting section of the import.Graphite cannula is added in fluid course, graphite cannula high temperature resistant can
Reduce infringement of the high-temperature liquid metal when flowing through fluid course to aerosolization nozzle.
The utility model also provides a kind of gas atomization device, and nozzle is used as using the aerosolization nozzle.
In one of the embodiments, the gas atomization device includes the aerosolization nozzle, atomisation tower and collector；
Fluid course of the molten metal through the aerosolization nozzle flows into the aerosolization nozzle, in formation in the atomisation tower
Molten drop, is collected after solidification in collector.
Brief description of the drawings
Fig. 1 be the embodiment of the utility model one in aerosolization nozzle structural representation, wherein, (a) be the aerosol
Change the overlooking the structure diagram of nozzle；(b) it is the cross-sectional view of the aerosolization nozzle；(c) sprayed for the aerosolization
The present invention looks up structural representation of mouth；
Fig. 2 be the embodiment of the utility model one in aerosolization nozzle the first outlet passageway and the second outlet passageway angle
Schematic diagram is set；
Fig. 3 be the embodiment of the utility model one in aerosolization nozzle in fluid course and graphite cannula cooperation schematic diagram；
Fig. 4 be the embodiment of the utility model one in gas atomization device structural representation.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But, the utility model can come real in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
The understanding for opening content is more thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
A kind of aerosolization nozzle 1 of the present embodiment, as illustrated in figures la-c, including body, the body is interior to be provided with fluid course 20
With gas channel 30, and with the first face 11 and the second face 12 that are oppositely arranged, fluid course 20, which has, is opened in the first face 11
Import and be opened in the outlet in the second face 12.
Gas channel 30 includes some inlet channels 31, air cavity 32 and the outlet passageway set gradually along airflow direction.Enter
Gas passage 31 is opened in the side of aerosolization nozzle 1.In the present embodiment, outlet passageway includes the first outlet passageway 33 and second
Outlet passageway 34, the first outlet passageway 33 and the second outlet passageway 34 are set around fluid course 20 successively, and in the second face 12
Form the first gas outlet and the second gas outlet successively around outlet.
High pressure draught is entered after air cavity 32 by inlet channel 31, and shape is sprayed by the first gas outlet of the first outlet passageway 33
Into the first atomization focus, the second atomization focus is formed while being sprayed by the second gas outlet of the second outlet passageway 34.
Above-mentioned aerosolization nozzle 1, sets the first outlet passageway 33 and the second outlet passageway 34, and the He of the first outlet passageway 33
Second outlet passageway 34 is set around fluid course 20 successively, forms the first gas outlet successively around outlet and the second outlet
Mouthful, the structure of double spray ring is consequently formed, the structure of the double spray ring can form the first atomization focus and the second atomization focus.Preparing
During metal dust, molten metal is broken up in the first atomization focal point by gas, forms certain metal liquid film and certain metal powder
End, then reaches second under the carrying of high velocity air and is atomized focus so that metal liquid film or uncooled metal dust are complete
Into secondary impact, so that metal liquid film or metal dust are become into more tiny metal dust, the dual of molten metal is completed
Atomization process, makes the metal dust prepared more tiny.Meanwhile, using spray ring structure, air-flow is uniform compared with spray orifice, Ke Yibao
The metal dust prepared is demonstrate,proved during double atomization, the surface topography of preferable particle size and particle is obtained.
In other embodiments, as needed, the outlet passageway of more than two may also set up.
In the present embodiment, air cavity 32, the first outlet passageway 33 and the second outlet passageway 34 are set around fluid course 20
Put, and the axis of the first outlet passageway 33 and the second outlet passageway 34 is overlapped with the axis of fluid course 20.Meanwhile, through
The the first atomization focus and the second atomization focus that the gas that one gas outlet and the second gas outlet spray is formed are respectively positioned on liquid circulation
On the axis in road 20.It is possible thereby to obtain more preferable atomizing effect, optimize the size of metallic particles and the surface shape of particle
Looks.
In the present embodiment, the second face 12 include depressed part, the depressed part include parallel to the first face 11 bottom surface and
The side set around the bottom surface.Outlet is arranged at the bottom surface, and the first gas outlet and the second gas outlet are arranged at the side.Thus
It is more beneficial for the ejection of air-flow and the formation of the first atomization focus and the second atomization focus.
In the present embodiment, the quantity of inlet channel 31 is 2, and two inlet channels are symmetricly set in the both sides of body.
It is understood that in other embodiments, the quantity of inlet channel 31 is alternatively 1 or more than 2.
In originally implementing, body is in cylinder.It is understood that in other embodiments, it would however also be possible to employ other shapes.
In the present embodiment, the side wall of air cavity 32 is set to streamline arc, smooth during in order to airflow passes air cavity 32
The first outlet passageway 33 and the second outlet passageway 34 are circulated to, its size can carry out conventional set according to the size of aerosolization nozzle
Meter.It is understood that in other embodiments, can also be set using other shapes of side wall.
Further as shown in Fig. 1 b, 1c and Fig. 2, the first outlet passageway 33 includes setting gradually the first contraction along airflow direction
The 331, first throat 332 of section and the first diffuser 333；On the longitudinal section of the first outlet passageway 33, the first contraction section 331 is dimension
The continuous contraction structure of octyl group shaped form is held in the palm, the first throat 332 is isometrical rectilinear structure, and the first diffuser 333 is elliptical shaft pair
Claim bit stream formula structure, section of first diffuser 333 along the axis of the first outlet passageway 33 is one section of elliptic curve, and the first throat
The port of export of 332 port of export to the first diffuser 333 is incremented by for continuously smooth.First contraction section 331, the and of the first throat 332
Seamlessly transitted between the three of first diffuser 333.In the present embodiment, the center line and fluid course of the first diffuser 333
Angle α between 20 axis is 20 °.It is understood that in other embodiments, can also be set using other angles, be preferably
10~30 °.
Similar, the second outlet passageway 34 includes the second contraction section 341, the second throat set gradually along airflow direction
342 and second diffuser 343；On the longitudinal section of the second outlet passageway 34, the second contraction section 341 connects for Vito octyl group shaped form
Continuous contraction structure, the second throat 342 is isometrical rectilinear structure, and the second diffuser 343 is oval axial symmetry bit stream formula structure, the
Section of two diffusers 343 along the axis of the second outlet passageway 34 is one section of elliptic curve, and the second throat 342 the port of export to the
The port of export of two diffusers 343 is incremented by for continuously smooth.Second contraction section 341, the second throat 342 and the second diffuser 343 3
Seamlessly transitted between person.In the present embodiment, between the center line of the second diffuser 343 and the axis of fluid course 20
Angle β is 15 °.It is understood that in other embodiments, can also be set using other angles, preferably 15~25 °.
In addition, in the present embodiment, the spacer portion 35 between the first outlet passageway 33 and the second outlet passageway 34, by even
Socket part 351 and the side of the first outlet passageway 33 are connected.It is understood that in other embodiments, can also use other manner
Spacer portion 35 between first outlet passageway 33 and the second outlet passageway 34 is fixed.
Further the structure to the first outlet passageway 33 and the second outlet passageway 34 is rationally controlled, and can optimize to be formed
Metallic particles size and the surface topography of particle.
As shown in figure 3, the aerosolization nozzle 1 of the present embodiment also includes graphite cannula 40.In the present embodiment, graphite cannula 40 has
There is the body 42 for the hollow tubular being embedded in fluid course 20, and be resisted against the butting section 41 of import.The chi of graphite cannula 40
Very little to match with fluid course 20, the hollow space size of body 42 can carry out conventional arrangement as needed.In addition, graphite cannula
Supporting part 43 is additionally provided between 40 body 42 and butting section 41, it is strong for ensure to combine between butting section 41 and body 42
Degree.Graphite cannula 40 is added in fluid course 20, graphite material high temperature resistant can reduce high-temperature liquid metal and flow through fluid course 20
When infringement to aerosolization nozzle 1.It is understood that in other embodiments, can also be not provided with the graphite cannula 40.
The present embodiment also provides a kind of gas atomization device using aerosolization nozzle 1 as nozzle, as shown in figure 4, aerosolization
Device includes aerosolization nozzle 1, atomisation tower 2 and powder collecting pot 3.Fluid course 20 of the molten metal through aerosolization nozzle 1 flows into aerosol
Change nozzle 1, in forming molten drop in atomisation tower 2, collected after nodularization solidification in powder collecting pot 3.It is prepared by the gas atomization device
Obtained metal dust size is suitable, and surface topography is preferably, can be applied to 3D printing technique.
Further, the gas atomization device also includes being arranged at vacuum induction melting furnace 4, aerosolization on atomizer 1
Connected between nozzle 1 and vacuum induction melting furnace 4 by tundish 5.It is metal that the induction melting furnace 4, which is used for Metal Melting,
Liquid, so that molten metal flows directly into the formation spraying of aerosolization nozzle 1.
According to identical preparation method, above-mentioned aerosolization nozzle is respectively adopted, and single spraying ring (is not provided with first passage
33) (outlet passageway of ring-type first and the second outlet passageway in embodiment are replaced with symmetrically arranged 4 respectively with double spray orifices
Spray orifice) nozzle carry out metal dust (316L stainless steel metals powder, Co based alloys metal dust, Ti64 alloyed metal powders)
Preparation, comparing result is as shown in table 1-3.
The 316L stainless steel metals powder production of table 1 is contrasted
| Embodiment | Single spraying ring | Double spray orifices | |
| Fine powder recovery rate | 70% | 50% | 45% |
| The pressure of atomization gas | 1.0MPa~1.5MPa | 1.2MPa~1.8MPa | 1.2~1.7MPa |
| Gas liquid ratio | 5:1~8:1 | 5:1~10:1 | 5:1~10:1 |
The production contrast of table 2Co based alloys metal dust
| Embodiment | Single spraying ring | Double spray orifices | |
| The rate that fine powder is received | 72% | 55% | 50% |
| The pressure of atomization gas | 1.3MPa~2.0MPa | 1.5MPa~2.3MPa | 1.5MPa~2.1MPa |
| Gas liquid ratio | 7:1~11:1 | 8:1~13:1 | 8:1~13:1 |
The production contrast of table 3Ti64 alloyed metal powders
| Embodiment | Single spraying ring | Double spray orifices | |
| Fine powder recovery rate | 70% | 50% | 45% |
| The pressure of atomization gas | 1.0MPa~1.5MPa | 1.2MPa~1.8MPa | 1.2MPa~1.7MPa |
| Gas liquid ratio | 5:1~8:1 | 5:1~10:1 | 5:1~10:1 |
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. gas channel and fluid course are provided with a kind of aerosolization nozzle, it is characterised in that including body, the body；Institute
Stating body has the first face and the second face being oppositely arranged, and the fluid course has the import for being opened in first face and opened
Outlet located at second face；
The gas channel includes inlet channel, air cavity and the outlet passageway set gradually along airflow direction；The outlet passageway
Quantity be at least two, each outlet passageway successively around the fluid course set, and second face formed according to
The secondary gas outlet around the outlet；
Air-flow is entered after the air cavity by the inlet channel, is sprayed by the gas outlet and is formed atomization focus.
2. aerosolization nozzle according to claim 1, it is characterised in that the atomization focus is located at the fluid course
On axis.
3. aerosolization nozzle according to claim 1, it is characterised in that the outlet passageway include the first outlet passageway and
Second outlet passageway, first outlet passageway and the second outlet passageway are formed successively in second face around the outlet
First gas outlet and the second gas outlet；First gas outlet is located between the outlet and the second gas outlet.
4. aerosolization nozzle according to claim 3, it is characterised in that first outlet passageway is included along airflow direction
The first contraction section, the first throat and the first diffuser set gradually；On the longitudinal section of first outlet passageway, described
One contraction section continuously shrinks in Vito octyl group shaped form, and first throat is in isometrical linear, and first diffuser is in ellipse
The symmetrical bit stream formula of circular shaft is linear, and the port of export of the port of export to first diffuser of first throat is passed for continuously smooth
Increase.
5. aerosolization nozzle according to claim 4, it is characterised in that the axis of first diffuser and the liquid
Angle α between the axis of circulation road is 10~30 °.
6. aerosolization nozzle according to claim 3, it is characterised in that second outlet passageway is included along airflow direction
The second contraction section, the second throat and the second diffuser set gradually；On the longitudinal section of second outlet passageway, described
Two contraction sections continuously shrink in Vito octyl group shaped form, and second throat is in isometrical linear, and second diffuser is in ellipse
The symmetrical bit stream formula of circular shaft is linear, and the port of export of the port of export to second diffuser of second throat is passed for continuously smooth
Increase.
7. aerosolization nozzle according to claim 6, it is characterised in that the axis of second diffuser and the liquid
Angle β between the axis of circulation road is 15~25 °.
8. aerosolization nozzle according to claim 3, it is characterised in that second face includes depressed part, the depression
Portion includes the side set parallel to the bottom surface in first face and around the bottom surface；The outlet is arranged at the bottom
Face, first gas outlet and the second gas outlet are arranged at the side.
9. the aerosolization nozzle according to claim any one of 1-8, it is characterised in that also including graphite cannula；The graphite
Set is with the hollow body being embedded in the fluid course, and is resisted against the butting section of the import.
10. a kind of gas atomization device, it is characterised in that including any one of the claim 1-8 aerosolization nozzles, atomisation tower and
Collector；
Molten metal flows into the aerosolization nozzle through the fluid course, in forming molten drop in the atomisation tower, after solidification
Collected in collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720081066.7U CN206605034U (en) | 2017-01-22 | 2017-01-22 | Aerosolization nozzle and gas atomization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720081066.7U CN206605034U (en) | 2017-01-22 | 2017-01-22 | Aerosolization nozzle and gas atomization device |
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| CN206605034U true CN206605034U (en) | 2017-11-03 |
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| CN201720081066.7U Active CN206605034U (en) | 2017-01-22 | 2017-01-22 | Aerosolization nozzle and gas atomization device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274013A (en) * | 2018-04-23 | 2018-07-13 | 安徽哈特三维科技有限公司 | A kind of gas atomization prepares the special atomizer of 3D printing titanium alloy spherical powder |
| CN108480652A (en) * | 2018-04-23 | 2018-09-04 | 安徽哈特三维科技有限公司 | It is a kind of to prepare spherical metal powder high efficiency annular distance gas atomizing nozzle |
| CN110899713A (en) * | 2019-12-20 | 2020-03-24 | 北京机科国创轻量化科学研究院有限公司 | Novel close coupling gas atomizing nozzle |
-
2017
- 2017-01-22 CN CN201720081066.7U patent/CN206605034U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108274013A (en) * | 2018-04-23 | 2018-07-13 | 安徽哈特三维科技有限公司 | A kind of gas atomization prepares the special atomizer of 3D printing titanium alloy spherical powder |
| CN108480652A (en) * | 2018-04-23 | 2018-09-04 | 安徽哈特三维科技有限公司 | It is a kind of to prepare spherical metal powder high efficiency annular distance gas atomizing nozzle |
| CN110899713A (en) * | 2019-12-20 | 2020-03-24 | 北京机科国创轻量化科学研究院有限公司 | Novel close coupling gas atomizing nozzle |
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