CN203330402U - Adjustable titanium and titanium alloy melt superfine atomizing nozzle - Google Patents
Adjustable titanium and titanium alloy melt superfine atomizing nozzle Download PDFInfo
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- CN203330402U CN203330402U CN2013203118453U CN201320311845U CN203330402U CN 203330402 U CN203330402 U CN 203330402U CN 2013203118453 U CN2013203118453 U CN 2013203118453U CN 201320311845 U CN201320311845 U CN 201320311845U CN 203330402 U CN203330402 U CN 203330402U
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Abstract
The utility model discloses an adjustable titanium and titanium alloy melt superfine atomizing nozzle. A liquid titanium guide pipe penetrates through a liquid titanium channel along the axis, a nozzle sleeve is fixed at one end of the liquid titanium guide pipe through a locating bolt, a high pressure air source chamber provided with a high pressure air source inlet is formed between the outer wall of the liquid titanium guide pipe and the inner wall of the nozzle sleeve, the outer wall of the liquid titanium guide pipe and the inner wall of the nozzle sleeve are separated by the locating bolt, and the other end of the liquid titanium guide pipe gradually contracts. Two slopes are arranged on the inner wall, opposite to a gradually-contracting face, of the nozzle sleeve, so that a Laval nozzle is formed between the inner wall of the nozzle sleeve and the gradually-contracting outer wall of the liquid titanium guide pipe. The size of the section of the Laval nozzle can be adjusted by the locating bolt, the size of a throat of the Laval nozzle can be adjusted through the nozzle sleeve, the mach number of the sprayed high pressure air flow is decided by the size of the throat of the Laval nozzle, and accordingly the size of round powder particles formed by atomizing titanium and titanium alloy is decided. The atomizing nozzle can obtain different-sized powder particles according to requirements and improves equipment flexibility. In addition, an atomizing process is stable and easy to control.
Description
Technical field
The utility model relates to a kind of nozzle, is specifically related to a kind of metal dust atomizer.
Background technology
The preparation method of submicron metal commonly used has Mechanical Method (as ball-milling method and the broken method of air-flow abrasive dust), Physical (as ion rotary electrode method and gas atomization) and physical-chemical method, and the gas atomization rule is divided into traditional atomization technique (mainly comprising ultrasonic atomization technology, close coupling atomization technique and gases at high pressure atomization technique) and Novel atomized technology (mainly contain laminar flow atomization technique, ultrasonic close coupling atomization technique and hot gas atomization technique, many places are in conceptual phase at present).Wherein, Mechanical Method is only suitable for the broken powder process of brittle metal and alloy, and physical-chemical method is difficult to be applied to large-scale industrial production, so research focuses mostly at gas atomization at present.
Representative nozzle arrangements mainly contains three major types: ultrasonic atomization technology; Close coupling (close-coupled) atomization technique and gases at high pressure atomization technique:
Ultrasonic atomization technology is combined by Laval nozzle and Hartmann's vibrating tube, when producing 2 ~ 2.5 Mach number supersonic flows, produces the pulse frequency of 80-100kHz; This technology can only just have better effects in the situation that the metal liquid stream diameter is less than 5mm, therefore is applicable to the production of the metal powder with low melting points such as aluminium.
The main thought of close coupling atomization technique is to increase the efficiency of transmission of gas kinetic energy to metal liquid stream, and the mechanism that improves the restraint-type nozzle makes air-flow the shortest from the distance that is exported to liquid stream, has therefore become at present the first-selection of most atomization plant; Yet in the close coupling atomization technique, comprise many physics and chemistry processes, exist the transmitting procedures such as heat energy of kinetic energy and the liquid of gas, situation is very complicated, the mechanism of action of air-flow and liquid stream is not studied clear so far fully, simultaneously, need accurate control just can avoid the wild effects such as gaging somebody of atomization process.
The gases at high pressure atomization technique changes the outlet of the circumferential weld of close-coupled nozzle into 20～24 single spray orifices, by improving the shape design in air pressure (can reach 17MPa) and change catheter exit, overcome the gas shock (this is to produce the reason of above-mentioned wild effect in close-coupled nozzle) existed in close-coupled nozzle, make air-flow be the supersonic speed laminar condition, and form effective negative pressure in the catheter exit; The place one of gases at high pressure atomization technique deficiency is the rate of output of fine powder low (being less than 20%), the 2nd, and gas consumption is large, and production cost is high.
For this reason, by the nineties in last century so far, abroad the research of atomization technique obtained to new progress at following three aspects::
The laminar flow atomization technique carries out significant improvement to nozzle, the concept of laminar flow ultrasonic atomizatio has been proposed, make air-flow be laminar condition in nozzle, metal liquid stream also is laminar condition simultaneously, and air-flow impacts liquid metal stream no longer at an angle, but is parallel to liquid metal stream, the shearing force that here liquid metal stream relies on air-flow to produce on liquid stream surface and extruding and be out of shape, the liquid flow diameter constantly reduces, and the laminar flow fibrillatable occurs, and this process is carried out in a stable air-flow and metal flow field.But it is large that this atomization technique is controlled difficulty, and atomization process is unstable, and output little (the metal quality flow rate is less than lkg/min), is unfavorable for suitability for industrialized production.
Ultrasonic close coupling atomization technique carries out structure optimization to close coupling circular seam type nozzle, and the one, make the muzzle velocity of air-flow surpass the velocity of sound, thereby obtain high velocity air under less atomizing pressure, the 2nd, the volume flow rate of increase metal liquid stream.At present still in laboratory stage.
The hot gas atomization technique is to increase its kinetic energy by the method that improves the atomizing medium temperature, and then improves nebulization efficiency and save throughput.But the hot gas atomization technique is due to the restriction that is subject to gas heating system and nozzle, design, powder property, institutional framework and the gas consumption of its atomization mechanism, nozzle also seldom had to research report.
The utility model content
The utility model purpose: the purpose of this utility model is in order to overcome the deficiencies in the prior art, and a kind of adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle is provided, and purpose is to obtain titanium or the titanium alloy powder of different fineness according to need of production.
Technical scheme: a kind of adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle described in the utility model, comprise the nozzle overcoat, titanium liquid mozzle and bolt, described titanium liquid mozzle is penetrated with titanium liquid passage along axis, described nozzle overcoat is fixed on an end of described titanium liquid mozzle by described bolt, form the high-pressure air source chamber that is provided with the high-pressure air source entrance between the described titanium liquid mozzle outer wall separated by described bolt and described nozzle outer casing inner wall, the other end gradually closing of described titanium liquid mozzle, the inwall of the described nozzle overcoat relative with gradually closing face comprises between two domatic outer walls that make itself and the gradually closing of described titanium liquid mozzle and forms De Laval noz(zle), because bolt has determined the distance between nozzle overcoat and titanium liquid mozzle, therefore can be regulated by described bolt the sectional dimension of described De Laval noz(zle), sectional dimension has determined the flow of the air-flow that ejects from the high-pressure air source chamber and the speed that air-flow ejects from De Laval noz(zle), and directly have influence on air-flow and the titanium or titanium alloy flowed out in titanium liquid passage is carried out to the size of the powder particle after atomization.
Concrete, two domatic actinal surface and exit faces of including of described nozzle overcoat, described inlet face extends out and gradually closing from the high-pressure air source chamber, and the linking point of described inlet face and exit face is venturi, and described exit face extends also gradually wealthy from described venturi; The air-flow that enters De Laval noz(zle) from the high-pressure air source chamber accelerates to gradually velocity of sound at inlet face in the space of venturi, and the space from the venturi to the exit face further accelerates to supersonic speed.
Further, the ratio of the area of section of described venturi and the discharge area of De Laval noz(zle) is 1:1.53, make the Mach 2 ship 2.0 in the De Laval noz(zle) outlet of gas flow, realize 2 times of velocities of sound, the ratio of the pressure of gas flow and De Laval noz(zle) outlet back pressure is 8.31, when assurance titanium or titanium alloy liquid flows out from titanium liquid passage, under the shear action of supersonic airstream, is broken into the spheroidal drop, thereupon cooling rapidly, form the spheroidal fine powder.
Described titanium liquid mozzle gradually closing face, described nozzle overcoat inlet face and described nozzle overcoat exit face reduce successively with the angle of plumb line respectively, guarantee that high-pressure gas flow enters De Laval noz(zle) and can be accelerated to velocity of sound at venturi, outlet at De Laval noz(zle) is accelerated to supersonic speed, gas flow realizes that unshock expands, therefore produce back pressure in the De Laval noz(zle) exit, produce certain negative pressure with De Laval noz(zle), exporting close titanium liquid mozzle lip place, due to the pressure differential of the pressure in titanium liquid passage with the outlet negative pressure, guiding titanium liquid flows out in titanium liquid passage.
In order to regulate the sectional dimension of De Laval noz(zle), at first described bolt is fixed on to an end of described titanium liquid mozzle, one group of thickness location supplementary plate identical with described De Laval noz(zle) venturi width is coated on the gradually closing face of described titanium liquid mozzle, supplementary plate cover screwing outside described nozzle in described location takes out after being fixed on described bolt, thereby makes the De Laval noz(zle) typing; By this kind of mode, assemble, determined the width of De Laval noz(zle) venturi by the thickness of location supplementary plate, therefore can select according to the fineness of powder after required atomization the location supplementary plate of different-thickness, form the De Laval noz(zle) of different size, in actual production, if will produce metal dust dissimilar and that fineness is big or small, without the nozzle of changing the different size size, only need to adopt the location supplementary plate to be regulated De Laval noz(zle) venturi size of the present utility model, can selectively produce.
Preferably, described location supplementary plate is 2 ~ 3, and now, the venturi width that the location supplementary plate the most easily takes out and obtains is the most accurate; If adopt a monoblock location supplementary plate, because the gradually closing Noodles of titanium liquid mozzle is similar to taper seat, a monoblock location supplementary plate is larger with the contact-making surface of titanium liquid mozzle, and frictional force is larger, therefore take out while locating supplementary plate, is not drawn out easily; If adopt the more location supplementary plate of multi-disc number to regulate location, the sheet number is too many, causes the venturi width of all directions not wait, and while taking out because every location supplementary plate area is little, difficult taking-up even easily slips in the high-pressure air source chamber.
Preferably, described nozzle overcoat is made by titanium alloy, if make with other metals, gas flow can be with the molecule that puts other metals nozzle when the high-pressure air source chamber goes out, when the titanium or titanium alloy liquid that titanium liquid mozzle is flowed out is pulverized, can make to be mixed with in titanium liquid the impurity of other metals, and the nozzle overcoat is made with titanium alloy and can be avoided this type of contamination phenomenon to produce, and guarantees that the powder purity after atomization is pulverized is high; Preferably, described titanium liquid mozzle and bolt are made by tungsten alloy, tungsten alloy is high temperature resistant, produce hot environment in atomization process, tungsten alloy can not decompose titanium or titanium alloy is polluted, and with titanium or titanium alloy, compatibility is preferably arranged, thereby guarantee that the titanium or titanium alloy powder generated has higher purity.
Beneficial effect: 1, the size of De Laval noz(zle) venturi can be regulated by bolt, the width of venturi has determined the Mach number of high pressure draught ejection, therefore determined the size of circular powder particle after the titanium or titanium alloy atomization, therefore use atomizer of the present utility model, can obtain as required the powder of variable grain size, thereby increased the flexibility of equipment, and atomization process is stable, is easy to control; 2, because nozzle overcoat, titanium liquid mozzle and bolt are made by alloy, therefore the jade material that its machining accuracy is used than common aluminium alloy atomization is much higher, each part dimension is accurate, then after the titanium or titanium alloy atomization, the size of circular powder particle also can accurately be controlled, secondly alloy material is more wear-resisting, so its life-span is more much higher than like product, the average atomizing cost; 3, this product, except can be used for the atomization titanium or titanium alloy, also can be used for similarly other alloys of atomization fusing point.
The accompanying drawing explanation
Fig. 1 is vertical profile schematic cross-section of the present utility model;
Fig. 2 is transversal schematic cross-section of the present utility model.
The specific embodiment
Below technical solutions of the utility model are elaborated, but protection domain of the present utility model is not limited to described embodiment.
embodiment:a kind of adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle, as shown in Figure 1, 2, comprise nozzle overcoat 1, titanium liquid mozzle 2 and bolt 3, and nozzle overcoat 1 is made by titanium alloy, and titanium liquid mozzle 2 and bolt 3 are made by tungsten alloy.Titanium liquid mozzle 2 is penetrated with titanium liquid passage 4 along axis, nozzle overcoat 1 is fixed on an end of titanium liquid mozzle 2 by bolt 3, form the high-pressure air source chamber 6 that is provided with high-pressure air source entrance 5 between titanium liquid mozzle 2 outer walls that separated by bolt 3 and nozzle overcoat 1 inwall, the other end gradually closing of titanium liquid mozzle 2, the inwall of the nozzle overcoat 1 relative with gradually closing face 7 comprise two domatic: inlet face 8 and exit face 9, inlet face 8 extends out and gradually closing from high-pressure air source chamber 6, the linking point of inlet face 8 and exit face 9 is venturi 10, exit face 9 extends also gradually wealthy from venturi 10, form De Laval noz(zle) between the outer wall of two domatic and titanium liquid mozzle 2 gradually closings, titanium liquid mozzle 2 gradually closing faces 7, nozzle overcoat 1 inlet face 8 and nozzle overcoat 1 exit face 9 are α with the angle of plumb line respectively, β 1 and β 2, α > β 1 > β 2.
Shown in the design parameter of the present embodiment sees the following form:
| Mach number | 2.00 |
| Titanium liquid channel diameter | 3.00mm |
| Titanium liquid passage lip wall thickness | 2.00mm |
| α | 22.00° |
| Titanium liquid mozzle gradually closing face length degree | 20.00mm |
| De Laval noz(zle) venturi width w1 | 0.50mm |
| The De Laval noz(zle) throat radius | 10.00mm |
| De Laval noz(zle) goes out port radius | 7.04mm |
| The high-pressure air source constant pressure is strong | 4.16atm |
| The De Laval noz(zle) back pressure | 0.50atm |
| The De Laval noz(zle) rate of discharge | 1.80kg/min |
| De Laval noz(zle) exit width w2 | 1.16mm |
| De Laval noz(zle) exit face length | 15~16mm |
| De Laval noz(zle) inlet face length | 7~10mm |
| β1 | 45.00° |
| β2 | 11.03° |
Above-mentioned data can guarantee that the ratio of the discharge area (shaded area B in Fig. 2) of the area of section (shaded area A in Fig. 2) of venturi 10 and De Laval noz(zle) is 1:1.53, make the Mach 2 ship 2.0 in the De Laval noz(zle) outlet of gas flow, the ratio of the pressure of gas flow and De Laval noz(zle) outlet back pressure is 8.31, in order to realize the said nozzle size, venturi 10 sizes of De Laval noz(zle) are determined by bolt 3, bolt 3 in the present embodiment is the self-locking set bolt, at first the self-locking set bolt is fastened on an end of titanium liquid mozzle 2, then the three-piece metal sheet of predefined same uniform thickness (about 2mm wide * 20mm length * 0.5mm is thick) is attached on the gradually closing face 7 of titanium liquid mozzle 2, this predefined thickness has determined the width of nozzle throat 10, thereupon fixing along tightening on the outer radial of self-locking set bolt nozzle overcoat 1, finally take out the three-piece metal sheet, thereby formation De Laval noz(zle).
The specific works flow process of the present embodiment is: the titanium or titanium alloy ingot is melted, and is kept in the crucible of titanium liquid passage 4 tops; The high pressure argon gas enters high-pressure air source chamber 6 by high-pressure air source entrance 5, thereby enter the entrance of De Laval noz(zle), size due to De Laval noz(zle) gradually closing at the beginning, the high pressure argon gas accelerates gradually, at venturi, 10 places reach velocity of sound, then, due to De Laval noz(zle) wealthy size gradually, from venturi 10, to outlet, further accelerate to supersonic speed, reach Mach number 2 in exit; The supply pressure of high pressure argon gas and in the back pressure in De Laval noz(zle) exit, realize after making argon gas export by De Laval noz(zle) that unshock expands, at titanium liquid mozzle, 2 lip 11 places produce certain negative pressure, under the effect of titanium liquid mozzle 2 lip 11 place's negative pressure, titanium or titanium alloy liquid flows out from titanium liquid passage 4, and, under the shear action of supersonic speed argon stream, is broken into the spheroidal drop, thereupon cooling rapidly, form the spheroidal fine powder.
Claims (7)
1. an adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle, it is characterized in that: comprise the nozzle overcoat, titanium liquid mozzle and bolt, described titanium liquid mozzle is penetrated with titanium liquid passage along axis, described nozzle overcoat is fixed on an end of described titanium liquid mozzle by described bolt, form the high-pressure air source chamber that is provided with the high-pressure air source entrance between the described titanium liquid mozzle outer wall separated by described bolt and described nozzle outer casing inner wall, the other end gradually closing of described titanium liquid mozzle, the inwall of the described nozzle overcoat relative with gradually closing face comprises between two domatic outer walls that make itself and the gradually closing of described titanium liquid mozzle and forms De Laval noz(zle), regulated the sectional dimension of described De Laval noz(zle) by described bolt.
2. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 1, it is characterized in that: two domatic actinal surface and exit faces of including of described nozzle overcoat, described inlet face extends out and gradually closing from the high-pressure air source chamber, the linking point of described inlet face and exit face is venturi, and described exit face extends also gradually wealthy from described venturi.
3. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 2, it is characterized in that: the ratio of the area of section of described venturi and the discharge area of De Laval noz(zle) is 1:1.53.
4. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 1, it is characterized in that: described titanium liquid mozzle gradually closing face, described nozzle overcoat inlet face and described nozzle overcoat exit face reduce successively with the angle of plumb line respectively.
5. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 2, it is characterized in that: described bolt is fixed on an end of described titanium liquid mozzle, one group of thickness location supplementary plate identical with described De Laval noz(zle) venturi width is coated on the gradually closing face of described titanium liquid mozzle, after supplementary plate cover screwing outside described nozzle in described location is fixed on described bolt, takes out.
6. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 5, it is characterized in that: described location supplementary plate is 2 ~ 3.
7. adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle according to claim 1, it is characterized in that: described nozzle overcoat is made by titanium alloy, and described titanium liquid mozzle and bolt are made by tungsten alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203118453U CN203330402U (en) | 2013-06-03 | 2013-06-03 | Adjustable titanium and titanium alloy melt superfine atomizing nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203118453U CN203330402U (en) | 2013-06-03 | 2013-06-03 | Adjustable titanium and titanium alloy melt superfine atomizing nozzle |
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| CN203330402U true CN203330402U (en) | 2013-12-11 |
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| CN2013203118453U Withdrawn - After Issue CN203330402U (en) | 2013-06-03 | 2013-06-03 | Adjustable titanium and titanium alloy melt superfine atomizing nozzle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273070A (en) * | 2013-06-03 | 2013-09-04 | 南京雷瑞新材料科技有限公司 | Adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt |
| CN105618773A (en) * | 2016-03-21 | 2016-06-01 | 南京理工大学 | Gas atomization device for preparing 3D printing metal powder |
| CN108247075A (en) * | 2018-04-23 | 2018-07-06 | 安徽哈特三维科技有限公司 | A kind of atomizer arrangement that the metal ball shaped powder of superhigh temperature is prepared for gas atomization |
| CN113059166A (en) * | 2021-02-22 | 2021-07-02 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
| RU2756902C1 (en) * | 2021-02-24 | 2021-10-06 | Публичное акционерное общество "Электромеханика" | Adjustable nozzle for two-flow dispersion of metal melt |
-
2013
- 2013-06-03 CN CN2013203118453U patent/CN203330402U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273070A (en) * | 2013-06-03 | 2013-09-04 | 南京雷瑞新材料科技有限公司 | Adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt |
| CN103273070B (en) * | 2013-06-03 | 2015-08-05 | 南京雷瑞新材料科技有限公司 | A kind of adjustable titanium or titanium alloy liquation ultra-fine atomization spray nozzle |
| CN105618773A (en) * | 2016-03-21 | 2016-06-01 | 南京理工大学 | Gas atomization device for preparing 3D printing metal powder |
| CN105618773B (en) * | 2016-03-21 | 2019-01-04 | 南京理工大学 | A kind of gas atomization device being used to prepare 3D printing metal powder |
| CN108247075A (en) * | 2018-04-23 | 2018-07-06 | 安徽哈特三维科技有限公司 | A kind of atomizer arrangement that the metal ball shaped powder of superhigh temperature is prepared for gas atomization |
| CN113059166A (en) * | 2021-02-22 | 2021-07-02 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
| CN113059166B (en) * | 2021-02-22 | 2022-12-20 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
| RU2756902C1 (en) * | 2021-02-24 | 2021-10-06 | Публичное акционерное общество "Электромеханика" | Adjustable nozzle for two-flow dispersion of metal melt |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131211 Effective date of abandoning: 20150805 |
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| RGAV | Abandon patent right to avoid regrant |