CN113070480A - A carousel that is used for metal centrifugation atomizing powder process to have a disturbance structure - Google Patents
A carousel that is used for metal centrifugation atomizing powder process to have a disturbance structure Download PDFInfo
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- CN113070480A CN113070480A CN202110291222.3A CN202110291222A CN113070480A CN 113070480 A CN113070480 A CN 113070480A CN 202110291222 A CN202110291222 A CN 202110291222A CN 113070480 A CN113070480 A CN 113070480A
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- disc body
- bulges
- center
- grooves
- disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a turntable with a disturbance structure for metal centrifugal atomization powder making, which comprises a cylindrical turntable body, wherein the turntable body is provided with: the bulges are symmetrically arranged on the upper surface of the center of the disc by taking the circle center of the disc body as a base point, and a multi-circle annular distribution mode or a circle center radiation distribution mode is adopted; the grooves take the circle center of the disc body as a base point and are arranged in a staggered mode with the bulges. The invention can make the liquid film on the surface of the disc body generate vibration and propagate to form unstable waves under the action of the disturbance structure, and the unstable waves aggravate and accelerate the process of centrifugally breaking the liquid film into liquid drops, so that the liquid drops have smaller diameter and shorter forming time. Therefore, the disc body with the disturbance structure can reduce the diameter of liquid drops, improve the atomization efficiency and increase the powder yield in the centrifugal atomization process.
Description
Technical Field
The invention relates to the field of metal atomization, and particularly provides a turntable with a disturbance structure for metal centrifugal atomization powder preparation.
Background
At present, the atomization techniques applied to high-temperature metal powder mainly include gas atomization (AA method), vacuum induction gas atomization (VIGA method), crucible-free electrode induction melting gas atomization (EIGA method), plasma torch method (PA method), plasma rotation atomization (PREP method), and rotary disk centrifugal atomization.
In the EIGA process, slowly rotating electrode materials are melted by a high-frequency induction coil and form fine liquid flows (liquid flows do not need to contact a water-cooled crucible and a flow guide pipe) by controlling melting parameters, and when alloy liquid flows through an atomizing nozzle, the liquid flows are smashed and solidified by high-speed pulse air flow generated by the atomizing nozzle to form fine powder particles. The EIGA method powder has the biggest advantages of no refractory material inclusion and low energy consumption, and has the defects that the granularity of metal powder prepared by the prior domestic technology is relatively large, and the segregation of an electrode can cause the uneven components of an alloy powder material.
The powder prepared by the PREP method has the advantages of clean surface, high sphericity, few associated particles, no hollow/satellite powder, good fluidity, high purity, low oxygen content, narrow particle size distribution and the like. However, the PREP process is limited by related technical bottlenecks such as sealing and vibration caused by a large increase in the speed of the electrode rod, and it is still difficult to prepare fine particle size powder at low cost by using this method.
The turntable centrifugal atomization method is characterized in that metal liquid flows to the center of the surface of a turntable rotating at a high speed, and fine liquid drops are thrown out from the edge of the turntable and are solidified into powder particles under the action of centrifugal force. The rotary disc atomization has the advantages of low cost, high particle size concentration ratio and the like, but if powder with very small particle size is required to be obtained, very high rotating speed and large rotary disc diameter are required, the rotating speed is limited by the highest rotating speed of drivers such as a motor, too high rotating speed is easy to generate vibration damage, the centrifugal force and vibration caused by the large rotary disc diameter are very large, and the requirement on the strength of the rotary disc is very high.
Therefore, a turntable structure capable of meeting the requirements of rotating speed and diameter of the turntable and obtaining tiny powder is needed.
Disclosure of Invention
The invention aims to provide a turntable with a disturbance structure for metal centrifugal atomization powder preparation.
Specifically, the invention provides a turntable with a disturbance structure for metal centrifugal atomization powder making, which comprises a cylindrical turntable body, wherein the turntable body is provided with:
the bulges are symmetrically arranged on the upper surface of the center of the disc by taking the circle center of the disc body as a base point, and a multi-circle annular distribution mode or a circle center radiation distribution mode is adopted;
the grooves take the circle center of the disc body as a base point and are arranged in a staggered mode with the bulges.
The embodiment of the invention can be effectively applied to the field of centrifugal atomization powder preparation of metal liquid. The liquid film on the surface of the disc body generates vibration and propagates to form unstable waves under the action of the disturbance structure, and the unstable waves aggravate and accelerate the process of centrifugally breaking the liquid film into liquid drops, so that the liquid drops are smaller in diameter and shorter in forming time. Therefore, the disc body with the disturbance structure can reduce the diameter of liquid drops, improve the atomization efficiency and increase the powder yield in the centrifugal atomization process.
Drawings
FIG. 1 is a cross-sectional view of a turntable configuration according to one embodiment of the present invention;
fig. 2 is a perspective view of a disc body according to an embodiment of the present invention.
Detailed Description
The detailed structure and implementation process of the present solution are described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in FIG. 1, in one embodiment of the present invention, a turntable with a disturbance structure for centrifugal atomization powder manufacturing of metal is disclosed, which comprises a cylindrical disk body, wherein the diameter of the disk body is 30-200, and the thickness of the disk body is 0.5-10 mm; the disc body is made of metal materials or non-metal materials, namely, the disc body can be made of materials capable of bearing the temperature of the metal liquid flow. And a disc shaft is fixed at the center of the circle of the lower surface of the disc body and is used for connecting other components.
The upper surface of the disc body is provided with a bulge and a groove. The bulges are symmetrically arranged on the upper surface of the center of the disc by taking the circle center of the disc body as a base point, and a multi-circle annular distribution mode or a circle center radiation distribution mode is adopted; the groove takes the circle center of the disc body as a base point and is arranged with the bulges in a staggered way.
That is, the grooves and the protrusions can be mutually used as reference points when being arranged, when the protrusions adopt a circle center radiation distribution mode, the grooves are respectively positioned between two rows of protrusions, each groove position corresponds to each protrusion position, and radial arrangement taking the circle center of the disc body as the center is formed, wherein the grooves and the protrusions are mutually clamped and arranged in a row when being distributed in a radiation mode, as shown in fig. 2.
When the bulges are distributed on the disc body in a multi-circle annular distribution mode, the grooves are respectively positioned between the circles formed by the bulges, and the positions of each groove correspond to the positions of each bulge respectively, so that a plurality of circles of annular arrangement taking the disc body as the center are formed.
The shape of the protrusion and the groove can be any shape, preferably, the protrusion is in a sawtooth shape, and the groove is in a conical shape. The shapes of the bulges and the grooves which are simultaneously arranged on the disc body can be respectively the same shape or the combination of two or more than two different shapes. Namely, the bulges and the grooves on the disc body can be simultaneously in a sawtooth shape; or the protrusions are saw-toothed, and the grooves are conical; or the protrusions in the same row can simultaneously comprise saw-toothed shapes, cylindrical shapes, rectangular shapes, elliptical shapes, parabolic shapes and the like, and the groove rows can also be formed in corresponding shapes. That is, the diameters of the projections and the grooves may be unlimited, and the heights and depths may also be unlimited, under the condition that the projections and the grooves can be arranged on the upper surface of the disc body.
When the metal disc works, the disc shaft 2 drives the metal body 1 to rotate at a high speed under the driving of a motor or an engine and other equipment. The liquid flows down at the center directly above the metal body 1 to form a stable liquid flow 3. After flowing to the surface of the metal body 1, the liquid flow 3 diffuses from the center to a thin liquid film 4 and flows to the edge of the metal body 1 under the multiple actions of gravity, fluid pressure and centrifugal force of the metal body.
If the surface of the metal body 1 is a flat plane, the liquid film 4 will stably flow to the edge of the upper surface of the metal body 1 for centrifugal atomization. Here, the change of the perturbation structure in the vibration process will be described by taking the example of providing the similar sawtooth-shaped protrusion 5, the sawtooth-shaped recess 6, the circular arc-shaped protrusion 7 and the circular arc-shaped recess 8 on the upper surface of the metal body 1. When the liquid film 4 flows on the upper surface of the metal body 1 and passes through the protrusions and the grooves, the stable flowing state can generate a disturbance phenomenon, the liquid film 4 generates upward severe vibration by the aid of the saw-tooth protrusions 5, the liquid film 4 generates downward severe vibration by the aid of the saw-tooth depressions 6, the liquid film 4 generates upward slow vibration by the aid of the circular-arc protrusions 7, and the liquid film 4 generates downward slow vibration by the aid of the circular-arc depressions 8. In the present embodiment, any regular or irregular structure produces different effects in terms of vibration and disturbance of the liquid film 4. In short, all the perturbation structures generate a vibration to the liquid film 4, and the vibration starts from the initial point of the position of the perturbation structure, forms unstable waves in the liquid film, spreads to the periphery and reaches the edge of the liquid film. The unstable wave will make the liquid film 4 flow and generate instability, locally form the flow field phenomenon of wave crest and wave trough, along with the flow of the liquid film 4, the unstable wave will be gradually enlarged, when the unstable wave is large to a certain extent, it is possible to make the liquid film 4 break into liquid filaments or liquid sheets, if the unstable wave intensity is not large, the liquid film 4 will still keep the continuous state. The intensity of the unstable wave is related to the thickness of the liquid film 4, the flow velocity, the size and shape of the perturbation structure, and other factors.
The liquid film 4 is thrown away at a high speed after flowing to the edge of the metal body 1 under the combined action of the fluid inertia force, the centrifugal force of the metal body 1 and the unstable wave, and is contracted into liquid drops 9 under the action of the surface tension. During the centrifugal break-up of the liquid film 4 into droplets, the unstable waves inside the liquid film 4 can intensify and accelerate the process, resulting in smaller diameter and shorter formation time of the droplets 9. Finally, the droplets 9 are cooled and solidified during flight to form metal powder.
This embodiment can effectual application in metal liquid's centrifugal atomization powder process field. The liquid film on the surface of the disc body generates vibration and propagates to form unstable waves under the action of the disturbance structure, and the unstable waves aggravate and accelerate the process of centrifugally breaking the liquid film into liquid drops, so that the liquid drops are smaller in diameter and shorter in forming time. Therefore, the disc body with the disturbance structure can reduce the diameter of liquid drops, improve the atomization efficiency and increase the powder yield in the centrifugal atomization process.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. The utility model provides a carousel that is used for metal centrifugal atomization powder process to have a disturbance structure, includes a columniform disc body, its characterized in that is provided with on the disc body:
the bulges are symmetrically arranged on the upper surface of the center of the disc by taking the circle center of the disc body as a base point, and a multi-circle annular distribution mode or a circle center radiation distribution mode is adopted;
the grooves take the circle center of the disc body as a base point and are arranged in a staggered mode with the bulges.
2. The rotary tray according to claim 1,
when the bulges adopt a circle center radiation distribution mode, the grooves are respectively positioned between two rows of bulges, and the positions of the grooves respectively correspond to the positions of the bulges, and form radial arrangement taking the circle center of the disc body as the center.
3. The rotary tray according to claim 1,
when the bulges are distributed in a multi-circle annular mode, the grooves are respectively positioned between circles formed by the bulges, and the positions of the grooves respectively correspond to the positions of the bulges, and a multi-circle annular arrangement taking the disc body as the center is formed.
4. The rotary tray according to claim 1,
the shape of the protrusion and the groove is any shape.
5. The rotary tray according to claim 4,
the shapes of the bulges and the grooves on the disc body are respectively the same shape or the combination of two or more than two different shapes.
6. The rotary tray according to claim 4,
the protrusions are saw-toothed, and the grooves are conical.
7. The rotary tray according to claim 1,
the diameter of the disc body is 30-200, and the thickness is 0.5-10 mm.
8. The turntable according to claim 1,
and a disc shaft is fixed at the center of the circle of the lower surface of the disc body and is used for connecting other components.
9. The rotary tray according to claim 1,
the disc body is made of metal materials or non-metal materials.
10. The rotary tray according to claim 1,
the diameter, height and depth of the protrusion and the groove are not limited under the condition that the protrusion and the groove can be arranged on the upper surface of the disc body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110291222.3A CN113070480B (en) | 2021-03-18 | 2021-03-18 | A carousel that is used for metal centrifugation atomizing powder process to have a disturbance structure |
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| CN202110291222.3A CN113070480B (en) | 2021-03-18 | 2021-03-18 | A carousel that is used for metal centrifugation atomizing powder process to have a disturbance structure |
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| CN113070480A true CN113070480A (en) | 2021-07-06 |
| CN113070480B CN113070480B (en) | 2022-05-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113579241A (en) * | 2021-08-03 | 2021-11-02 | 昆山轩塔电子科技有限公司 | Metal liquefaction atomizing device |
| CN115938072A (en) * | 2023-03-02 | 2023-04-07 | 西安秦皇医院 | Infrared ray anti-falling monitoring alarm device based on health management of old people |
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| CN115938072A (en) * | 2023-03-02 | 2023-04-07 | 西安秦皇医院 | Infrared ray anti-falling monitoring alarm device based on health management of old people |
| CN115938072B (en) * | 2023-03-02 | 2023-05-26 | 西安秦皇医院 | Infrared anti-falling monitoring alarm device based on old man health management |
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