CN201969633U - Atomizing nozzle for preparing metal powder with low melting point - Google Patents
Atomizing nozzle for preparing metal powder with low melting point Download PDFInfo
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- CN201969633U CN201969633U CN2010206361000U CN201020636100U CN201969633U CN 201969633 U CN201969633 U CN 201969633U CN 2010206361000 U CN2010206361000 U CN 2010206361000U CN 201020636100 U CN201020636100 U CN 201020636100U CN 201969633 U CN201969633 U CN 201969633U
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- fitting
- circumferential weld
- nozzle
- atomizer
- liquid guiding
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Abstract
The utility model relates to an atomizing nozzle for preparing metal powder with low melting point. The atomizing nozzle comprises a liquid guiding cavity, a concave nozzle opening under the liquid guiding cavity, and an annular high-pressure air inlet cavity on the periphery of the liquid guiding cavity. The high-pressure air inlet cavity is communicated with the nozzle opening orderly through a first-level annular seam channel and a second-level annular seam channel, wherein the first-level annular seam channel and the second-level annular seam channel are arranged on the inner side wall of the high-pressure air inlet cavity. The atomizing nozzle is assembled by a nozzle core, a nozzle sleeve, an upper connection member and a lower connection member coaxially. The atomizing nozzle is simple in structure, excellent in sealing performance of the air channel, and easy for processing form. The second-level annular seam channel is a retracting structure along the air flow direction, which improves airflow kinetic energy at a certain degree, and makes the G/M ratio appropriate. The concave nozzle opening shortens the distance of the metallic liquid in the liquid guiding cavity and slows the cooling of the metallic liquid in the liquid guiding cavity, which ensures the flowability of the metallic liquid. Combined with a reasonable spraying angle, the atomizing nozzle generates stable negative pressure air flow, thereby making an atomizing process stable.
Description
Technical field
The utility model relates to the molten metal atomising device that is used for spray forming technology, relates to a kind of atomizer that is used to prepare the low-melting-point metal powder especially.
Background technology
Spray forming technology is from ripe gradually a kind of flash set technology eighties, and it is one and relates to powder metallurgy, liquid metal atomizing, cools off and multi-field new material technology of preparing such as nonequilibrium freezing fast.Spray forming technology, be to utilize the inert gas of high speed and high pressure liquid metal to be atomized into the molten drop of different size, and with the atomization gas range of atomization that flies out at a high speed, molten drop is by a base board cutting subsequently, and on substrate, deposit, be frozen in conjunction with good blank, so also claim spray deposition technique near complete densification.
Wherein atomizer also claims atomizer, is the critical component that the deposit preform material obtains desirable microscopic structure.The complexity of atomization process makes the design of atomizer emerge in an endless stream, and ubiquitous is the stable wayward of ejection air-flow, and atomizing effect is difficult for guaranteeing.The kinetic energy that the metal atomization nozzle has gases at high pressure is converted into the metallic surface energy, and its energy conversion efficiency is most important, and the performance quality of atomizer is a decisive factor.Atomization powder process utilizes high velocity fluid strikes motlten metal or alloy stream, the process that it is cracked exactly.Atomizing nozzle structure is directly connected to atomization process, powder property and production efficiency.The atomizer that is used to produce the low-melting-point metal powder generally adopts free fall style circumferential weld nozzle, but circumferential weld nozzle difficulty focusing causes the disorderly district of very strong negative pressure in the exit, be unfavorable for carrying out continuously of atomization process.
On July 9th, 2008, the Chinese utility model patent CN201082470Y of Granted publication disclosed a kind of two nozzles of irising out air hole structure that have, though can entrainment problem by reasonable solution exit flow, the atomizing particle granularity is comparatively concentrated, but because venthole is simple circular perforations, hole is more shallow, because two venthole numbers of irising out air hole structure are on the high side, make that relatively the discharge gas pressure is less than normal, the energy of impact grinding molten drop is less than normal, cause the molten drop cooling velocity less, so gained atomized powder granularity is thicker.
Though though the nozzle of patent CN2873317 has adopted the circular seam type structure, but the diversion mode of its free fall style makes difficulty focusing, especially the size of the terminal projecting height h of drain is very big to the atomizing effect influence, needs frequent adjusting aborning, makes troubles to operation.
On February 10th, 2010, the Chinese utility model patent CN201399583Y of Granted publication disclosed a kind of gases at high pressure atomizer of the lava of having tubular construction formula venthole, though can obviously improve the air-flow velocity of discharge, accelerated the cooling of molten drop, the metal dust granularity that obtains is tiny, but skewness, may be to make that the discharge air-flow is excessive, the air-flow entrainment phenomena occur at the catheter end owing to introduce the lava tubular construction.So the instability of air-flow causes gained metal dust particle size distribution span big.
The utility model content
Technical problem to be solved in the utility model is: the circumferential weld nozzle can not guarantee effective refinement atomizing particle at present, particle size distribution is bigger, though and single employing lava tubular construction nozzle can improve the energy of the broken molten drop of gas shock, but can cause the air-flow instability, easily produce entrainment phenomena in air-flow intersection, difficulty of processing is bigger in addition.For addressing the above problem, the utility model provides a kind of circumferential weld nozzle of simple combination, and it is simple in structure to be easy to machine-shaping, in addition, the utility model adopts the contraction type structure of circumferential weld can to a certain degree strengthen air velocity, and effectively the fining metal particle is stablized atomization process.For the injection molding experiment, can obtain higher recovery rate of iron.
The utility model is by the following technical solutions:
A kind of atomizer that is used to prepare the low-melting-point metal powder is characterized in that, comprises liquid guiding cavity (8), and the lower end of liquid guiding cavity (8) is provided with concave shaped jet hole (9), is surrounded with annular high pressure admission chamber (5) around the liquid guiding cavity (8); High pressure admission chamber (5) is communicated with jet hole (9) by one-level circumferential weld passage (6) and secondary circumferential weld passage (7) successively, and one-level circumferential weld passage (6) and secondary circumferential weld passage (7) are positioned on the madial wall of high pressure admission chamber (5).
Preferable, the top of concave shaped jet hole (9) sidewall is divided into truncated cone-shaped, and the bottom is divided into cylindrical; The outlet of secondary circumferential weld passage (7) is positioned on the truncated cone-shaped sidewall of jet hole (9).
Preferable, there is chamfering in one-level circumferential weld passage (6) with secondary circumferential weld passage (7) place of connection.
Preferable, the direction of one-level circumferential weld passage (6) is tilted to, and the angle between the center line of its center line and liquid guiding cavity (8) is the 10-30 degree; The direction of secondary circumferential weld passage (7) is tilted to down, and the angle between the center line of its center line and liquid guiding cavity (8) is the 10-30 degree.
Preferable, the two side of one-level circumferential weld passage (6) is parallel, and its clearance distance is 0.5-3mm; The two side of secondary circumferential weld passage (7) is contraction-like along airflow direction, and its entrance slit distance is 3mm, and the outlet gap distance is 0.5mm.
Further, be connected with one or two air inlet pipe (10) on the lateral wall of high pressure admission chamber (5), air inlet pipe (10) is tangent with the lateral wall in high pressure admission chamber (5).
When described air inlet pipe (10) had two, two air inlet pipe (10) were parallel relatively, and laid respectively at the relative both sides of high pressure admission chamber (5) lateral wall.
Further, atomizer of the present utility model is by nozzle core (1), nozzle overcoat (2), uplink fitting (3) with downlink fitting (4) is coaxial assembles; Wherein: nozzle core (1) is the cylindrical shell of up/down perforation, and the hollow space of cylindrical shell is liquid guiding cavity (8); Nozzle overcoat (2) is the cylinder of hollow, the mid portion opening of its end face and bottom surface, and its end face edge of opening is connected with nozzle core (1) by uplink fitting (3), and its bottom surface edge of opening is connected with downlink fitting (4); Form annular high pressure admission chamber (5) between nozzle overcoat (2), uplink fitting (3) and the downlink fitting (4); Form one-level circumferential weld passage (6) between uplink fitting (3) and the downlink fitting (4); Form secondary circumferential weld passage (7) between nozzle core (1) and the downlink fitting (4); The bottom of the inboard of downlink fitting (4) and nozzle core (1) forms concave shaped jet hole (9).
Preferable, the top of nozzle core (1) lateral wall is provided with protrudes edge (11); Uplink fitting (3) is annular, and the top of its madial wall is provided with and protrudes the groove (31) that matches at edge (11), and the top of its lateral wall is provided with protrudes edge (32); Nozzle overcoat (2) end face edge of opening is provided with and protrudes the groove (21) that matches at edge (32); Downlink fitting (4) is annular, and its madial wall lower end is provided with the annular boss (41) of downward extension.
The atomizer of low-melting-point metal powder preparation device of the present utility model has following characteristics:
1, atomizer is formed by four parts overlap joints, and simple in structure, the gas channel good leak tightness is easy to machine-shaping.
2, the secondary circumferential weld is arranged to the contraction type structure along airflow direction, improved the kinetic energy of air-flow to a certain extent, can reach suitable G/M than (that is: gas liquid ratio, the mass ratio of the molten metal that flows out gaseous mass that goes out from nozzle ejection and the liquid guiding cavity), and for low-melting-point metal liquid, air-flow is not that big more fogging degree is just good more.
3, indent formula jet hole has shortened the length of liquid guiding cavity molten metal, and the cooling that has slowed down the chamber inner metal liquid has guaranteed the flowability of molten metal again in conjunction with the rational ejector angle, can form stable negative-pressure air-flow, and atomization process is stable.
Description of drawings
The nozzle core structure vertical view schematic diagram of Fig. 1 the utility model atomizer.
The nozzle core structural front view schematic diagram of Fig. 2 the utility model atomizer.
The nozzle jacket structure vertical view schematic diagram of Fig. 3 the utility model atomizer.
The nozzle jacket structure front view schematic diagram of Fig. 4 the utility model atomizer.
The uplink fitting structure vertical view schematic diagram of Fig. 5 the utility model atomizer.
The uplink fitting structural front view schematic diagram of Fig. 6 the utility model atomizer.
The downlink fitting structure vertical view schematic diagram of Fig. 7 the utility model atomizer.
The downlink fitting structural front view schematic diagram of Fig. 8 the utility model atomizer.
The general assembly vertical view schematic diagram of Fig. 9 the utility model atomizer.
The general assembly front view schematic diagram of Figure 10 the utility model atomizer.
The specific embodiment
Shown in Fig. 9,10, the utility model is used to prepare the atomizer of low-melting-point metal powder, comprises liquid guiding cavity 8, and the lower end of liquid guiding cavity 8 is provided with concave shaped jet hole 9, and the top of these concave shaped jet hole 9 sidewalls is divided into truncated cone-shaped, and the bottom is divided into cylindrical.Be surrounded with annular high pressure admission chamber 5 around the liquid guiding cavity 8; High pressure admission chamber 5 is communicated with jet hole 9 by one-level circumferential weld passage 6 and secondary circumferential weld passage 7 successively, one-level circumferential weld passage 6 and secondary circumferential weld passage 7 are positioned on the madial wall in high pressure admission chamber 5, and the outlet of secondary circumferential weld passage 7 is positioned on the truncated cone-shaped sidewall of jet hole 9.There is chamfering in one-level circumferential weld passage 6 with secondary circumferential weld passage 7 places of connection, to improve air pressure.
The direction of one-level circumferential weld passage 6 is tilted to, and the angle between the center line of its center line and liquid guiding cavity 8 is the 10-30 degree.The two side of one-level circumferential weld passage 6 is parallel, and its clearance distance is 0.5-3mm.
The direction of secondary circumferential weld passage 7 is tilted to down, and the angle between the center line of its center line and liquid guiding cavity 8 is the 10-30 degree.The two side of secondary circumferential weld passage 7 is contraction-like along airflow direction, and its entrance slit distance is 3mm, and the outlet gap distance is 0.5mm.The secondary circumferential weld passage 7 of contraction type is further accelerated air velocity, and the rational ejector angle forms stable negative pressure fluid layer.
Further, shown in Fig. 3,4, be connected with one or two air inlet pipe 10 on the lateral wall in high pressure admission chamber 5, air inlet pipe 10 is tangent with the lateral wall in high pressure admission chamber 5.Preferable, when described air inlet pipe 10 had two, two air inlet pipe 10 were parallel relative, and laid respectively at the relative both sides of high pressure admission chamber 5 lateral walls.
Further, the atomizer that is used to prepare the low-melting-point metal powder of the present utility model is by nozzle core 1, nozzle overcoat 2, uplink fitting 3,4 four element coaxials of downlink fitting, build and combine.Wherein:
As shown in Figure 1, 2, nozzle core 1 is the cylindrical shell of up/down perforation, and the hollow space of cylindrical shell is a liquid guiding cavity 8; The top of its lateral wall is provided with protrudes edge 11.Shown in Fig. 3,4, nozzle overcoat 2 is the cylinder of hollow, the mid portion opening of its end face and bottom surface, and its end face edge of opening is provided with groove 21.Shown in Fig. 5,6, uplink fitting 3 roughly is annular, and the top of uplink fitting 3 madial walls is provided with groove 31, and the top of its lateral wall is provided with protrudes edge 32.Shown in Fig. 7,8, downlink fitting 4 roughly is annular, and downlink fitting 4 madial wall lower ends are provided with the annular boss 41 of downward extension.
Shown in Fig. 1-10, the groove 21 of the end face edge of opening of nozzle overcoat 2 is connected with the protrusion edge 32 of uplink fitting 3, and the annular boss 41 of downlink fitting 4 bottoms is connected with the bottom surface edge of opening of nozzle overcoat 2, thereby forms the high pressure admission chamber 5 of an annular.Form one-level air-flow circular seam type passage 6 between uplink fitting 3 and the downlink fitting 4, constitute uplink fitting 3 bottom surfaces and the downlink fitting 4 end face keeping parallelisms of one-level circumferential weld passage, the slit is at 0.5～3mm.Protrusion edge 11 on the nozzle core 1 is connected with the top groove 31 of uplink fitting 3, forms secondary circumferential weld passage 7 between nozzle core 1 and the downlink fitting 4.Downlink fitting 4 forms indent formula nozzle arrangements with nozzle core 1, the formation of favourable negative pressure, the air-flow molten metal of stable ejection flows out from liquid guiding cavity 8, shortened the length of molten metal in the liquid guiding cavity 8, guaranteed the flowability of molten metal, molten metal plug nozzle mouth has been avoided in the design of circumferential weld, thereby has guaranteed that the stable of atomization process carries out.
Claims (9)
1. an atomizer is characterized in that, comprises liquid guiding cavity (8), and the lower end of liquid guiding cavity (8) is provided with concave shaped jet hole (9), is surrounded with annular high pressure admission chamber (5) around the liquid guiding cavity (8); High pressure admission chamber (5) is communicated with jet hole (9) by one-level circumferential weld passage (6) and secondary circumferential weld passage (7) successively, and one-level circumferential weld passage (6) and secondary circumferential weld passage (7) are positioned on the madial wall of high pressure admission chamber (5).
2. atomizer as claimed in claim 1 is characterized in that, the top of the sidewall of concave shaped jet hole (9) is divided into truncated cone-shaped, and the bottom is divided into cylindrical; The outlet of secondary circumferential weld passage (7) is positioned on the truncated cone-shaped sidewall of jet hole (9).
3. atomizer as claimed in claim 1 is characterized in that, there is chamfering in one-level circumferential weld passage (6) with secondary circumferential weld passage (7) place of connection.
4. atomizer as claimed in claim 1 is characterized in that, the direction of one-level circumferential weld passage (6) is tilted to, and the angle between the center line of its center line and liquid guiding cavity (8) is the 10-30 degree; The direction of secondary circumferential weld passage (7) is tilted to down, and the angle between the center line of its center line and liquid guiding cavity (8) is the 10-30 degree.
5. atomizer as claimed in claim 1 is characterized in that, the two side of one-level circumferential weld passage (6) is parallel, and its clearance distance is 0.5-3mm; The two side of secondary circumferential weld passage (7) is contraction-like along airflow direction.
6. atomizer as claimed in claim 1 is characterized in that, is connected with one or two air inlet pipe (10) on the lateral wall of high pressure admission chamber (5), and air inlet pipe (10) is tangent with the lateral wall in high pressure admission chamber (5).
7. atomizer as claimed in claim 6 is characterized in that, when described air inlet pipe (10) had two, two air inlet pipe (10) were parallel relatively, and lays respectively at the relative both sides of high pressure admission chamber (5) lateral wall.
8. as arbitrary described atomizer among the claim 1-7, it is characterized in that described atomizer is by nozzle core (1), nozzle overcoat (2), uplink fitting (3) and downlink fitting (4) is coaxial assembles; Wherein: nozzle core (1) is the cylindrical shell of up/down perforation, and the hollow space of cylindrical shell is liquid guiding cavity (8); Nozzle overcoat (2) is the cylinder of hollow, the mid portion opening of its end face and bottom surface, and its end face edge of opening is connected with nozzle core (1) by uplink fitting (3), and its bottom surface edge of opening is connected with downlink fitting (4); Form annular high pressure admission chamber (5) between nozzle overcoat (2), uplink fitting (3) and the downlink fitting (4); Form one-level circumferential weld passage (6) between uplink fitting (3) and the downlink fitting (4); Form secondary circumferential weld passage (7) between nozzle core (1) and the downlink fitting (4); The bottom of the inboard of downlink fitting (4) and nozzle core (1) forms concave shaped jet hole (9).
9. atomizer as claimed in claim 8 is characterized in that, the top of nozzle core (1) lateral wall is provided with protrudes edge (11); Uplink fitting (3) is annular, and the top of its madial wall is provided with and protrudes the groove (31) that matches at edge (11), and the top of its lateral wall is provided with protrudes edge (32); Nozzle overcoat (2) end face edge of opening is provided with and protrudes the groove (21) that matches at edge (32); Downlink fitting (4) is annular, and its madial wall lower end is provided with the annular boss (41) of downward extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206361000U CN201969633U (en) | 2010-12-01 | 2010-12-01 | Atomizing nozzle for preparing metal powder with low melting point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206361000U CN201969633U (en) | 2010-12-01 | 2010-12-01 | Atomizing nozzle for preparing metal powder with low melting point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201969633U true CN201969633U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206361000U Expired - Fee Related CN201969633U (en) | 2010-12-01 | 2010-12-01 | Atomizing nozzle for preparing metal powder with low melting point |
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| Country | Link |
|---|---|
| CN (1) | CN201969633U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107919A (en) * | 2013-04-16 | 2014-10-22 | 株洲火炬工业炉有限责任公司 | High-pressure water atomizing nozzle |
| 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 |
| CN115921881A (en) * | 2022-12-07 | 2023-04-07 | 宁波磁性材料应用技术创新中心有限公司 | Double-layer annular hole type atomizing spray disk |
-
2010
- 2010-12-01 CN CN2010206361000U patent/CN201969633U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107919A (en) * | 2013-04-16 | 2014-10-22 | 株洲火炬工业炉有限责任公司 | High-pressure water atomizing nozzle |
| CN104107919B (en) * | 2013-04-16 | 2016-07-06 | 株洲火炬工业炉有限责任公司 | A kind of high pressure water atomization nozzle |
| 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 |
| CN115921881A (en) * | 2022-12-07 | 2023-04-07 | 宁波磁性材料应用技术创新中心有限公司 | Double-layer annular hole type atomizing spray disk |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |