Stirring device and smelting system
By introducing structures such as friction balls and rotating flow-around ribs into the stirring device, the problem of uneven dispersion of silicon carbide reinforced particles in existing equipment has been solved, achieving efficient stirring and mixing effects and ensuring the quality of composite materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JICHENG ADVANCED CERAMICS CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-21
AI Technical Summary
Existing stirring casting equipment suffers from defects such as unsatisfactory stirring effect, uneven dispersion of silicon carbide reinforcing particles, porosity, and inclusions when stirring silicon carbide reinforcing particles with aluminum alloys.
A stirring device including a friction mechanism and a rotating flow guiding mechanism is adopted. Through structures such as friction balls and rotating flow-around ribs, turbulent and circulating flow of the material to be stirred is achieved, thereby improving the stirring uniformity and dispersion effect.
This method achieves uniform dispersion of silicon carbide reinforcing particles in aluminum alloys, reduces porosity and inclusions, and improves stirring efficiency and mixing effect.
Smart Images
Figure CN224142067U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of stirring devices, specifically relating to a stirring device and a melting system. Background Technology
[0002] Silicon carbide reinforced aluminum matrix composites (the main material components are silicon carbide reinforcing particles and aluminum alloys) have a series of advantages such as high specific strength, high specific stiffness, low coefficient of thermal expansion, good wear resistance and thermal and electrical conductivity, and have great development potential in the fields of automobile manufacturing, aerospace and military.
[0003] Stir casting achieves the wetting and dispersion of silicon carbide reinforcing particles in molten aluminum alloy through mechanical stirring, followed by direct casting to obtain ingots and castings. Compared with other preparation methods such as powder metallurgy, this method has low equipment costs, simple processes, and low production costs, making it suitable for continuous industrial production and capable of directly manufacturing products with relatively complex structures.
[0004] Most existing stirring casting methods employ heated vacuum furnace stirring, which can produce particle-reinforced composite materials. However, existing vacuum stirring casting equipment still has some problems that need improvement: 1. The stirring effect is not ideal, resulting in poor wettability between silicon carbide reinforcing particles and the matrix aluminum alloy, and weak bonding; 2. Under the action of centrifugal force during the stirring process, silicon carbide reinforcing particles tend to concentrate around the crucible, affecting the dispersion effect. Gases, oxides, slag, etc., are easily drawn into the melt, causing defects such as porosity and inclusions. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a stirring device and a melting system with significant stirring effect.
[0006] This utility model provides a stirring device, including a pot body, a friction mechanism, and a rotating guide mechanism;
[0007] The friction mechanism includes a tank body disposed inside the pot and a friction structure disposed inside the tank body, with flow structures provided on both sides of the tank body.
[0008] The rotary guide mechanism is used to drive the material to be stirred to circulate between the inner wall of the pot, between the inner wall of the pot and the outer wall of the tank, the flow structure on one side, inside the tank, and the flow structure on the other side.
[0009] Furthermore, the friction structure includes a number of friction balls disposed inside the tank; and / or, the friction structure includes a number of turbulence columns disposed on the inner wall of the tank.
[0010] Furthermore, the rotating flow guiding mechanism includes rotating flow-around ribs disposed inside the tank.
[0011] Furthermore, the rotary guide mechanism includes a rotary blade disposed outside the tank body and located outside the flow structure on one side.
[0012] Furthermore, a guide tube is provided on the side wall of the tank, protruding outward from the rotating blade.
[0013] Furthermore, through holes are provided on the opposite side walls of the tank;
[0014] It also includes a rotating shaft that is rotatably mounted on two through holes and extends out of the tank body at both ends;
[0015] The rotary flow guiding mechanism includes a rotary flow-around rib disposed inside the tank and fixed on a rotary shaft; and / or, the rotary flow guiding mechanism includes a rotary blade disposed outside the tank body, located on one side of a flow structure and fixed on a rotary shaft.
[0016] Furthermore, the axis of rotation is coaxial with the axis of the pot body;
[0017] The flow structure on the side where the material to be stirred flows in is a through hole, the diameter of which is larger than the diameter of the rotating shaft. The flow structure on the side where the material to be stirred flows out is a number of flow holes set on the tank wall.
[0018] This utility model also provides a smelting system, including a heating device and the above-mentioned stirring device.
[0019] Furthermore, the heating device includes a graphite heater disposed on the outside of the pot body and an induction coil sleeved on the outside of the graphite heater.
[0020] Furthermore, this smelting system also includes a feed pipe for introducing reinforcing particles into the material to be stirred.
[0021] The beneficial effects of this utility model are that the stirring device provided by this utility model will cause the material to be stirred to come into contact with the friction structure inside the tank when the material to be stirred flows inside the tank, so as to stir and mix. On the one hand, the friction structure increases the turbulence of the material to be stirred inside the tank, thereby improving the stirring and mixing effect. On the other hand, it can break up the clumps of material to be stirred, thereby improving the uniformity of stirring. In addition, the rotating guide mechanism allows the material to be stirred to circulate, so as to continuously stir and mix, thereby ensuring the stirring and mixing effect. Attached Figure Description
[0022] Appendix Figure 1 This is a front view of the smelting system in this utility model;
[0023] Appendix Figure 2 This is a top view of the smelting system in this utility model;
[0024] Appendix Figure 3 When the friction structure is a friction ball, it is attached Figure 2Sectional view along line AA;
[0025] Appendix Figure 4 This is a partial cross-sectional view of the tank when the friction structure is a friction ball;
[0026] Appendix Figure 5 This is a schematic diagram of the assembly of the rotating shaft, the rotating flow rib, and the rotating blade in this utility model.
[0027] Appendix Figure 6 This is a front perspective view of the stirring device in this utility model when the friction structure is a turbulence column;
[0028] Appendix Figure 7 This is a schematic diagram of the tank structure when the friction structure is a turbulence column;
[0029] Appendix Figure 8 This is a cross-sectional view of the tank when the friction structure is a turbulence column;
[0030] Appendix Figure 9 This is one of the schematic diagrams showing the flow of the material to be stirred in this utility model;
[0031] Appendix Figure 10 This is the second schematic diagram of the flow of the material to be stirred in this utility model.
[0032] In the figure, 1-feeding pipe; 2-fixed column; 3-rotating shaft; 4-graphite heater; 5-induction coil; 6-friction ball; 7-tank body; 701-flow hole; 702-turbulence column; 703-guide tube; 704-through hole; 8-rotating flow rib; 9-pot body; 10-rotating blade. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0038] As attached Figure 1 -Appendix Figure 10 As shown, this utility model provides a stirring device that can be used for stirring and mixing two or more liquids, or for mixing one or more liquids with one or more solid particles. In this case, one or more liquids are the main components to ensure that the material to be stirred is in a liquid state and can circulate.
[0039] The stirring device includes a pot body 9, a friction mechanism, and a rotary guide mechanism;
[0040] The friction mechanism includes a tank 7 disposed inside the pot body 9 and a friction structure disposed inside the tank 7. Flow structures are provided on both sides of the tank 7.
[0041] The rotary guide mechanism is used to drive the material to be stirred to circulate between the inner wall of the pot body 9, the inner wall of the pot body 9 and the outer wall of the tank body 7, the flow structure on one side, the inside of the tank body 7, and the flow structure on the other side.
[0042] The stirring device provided by this utility model, when the material to be stirred flows inside the tank 7, will cause the material to be stirred to come into contact with the friction structure inside the tank 7 for stirring and mixing. On the one hand, the friction structure increases the turbulence of the material to be stirred inside the tank 7, thereby improving the stirring and mixing effect. On the other hand, it can break up the clumps of material to be stirred, thereby improving the uniformity of stirring. In addition, the rotating guide mechanism allows the material to be stirred to circulate, so that stirring and mixing can be carried out continuously, thereby ensuring the stirring and mixing effect.
[0043] In one embodiment, reference is made to the appendix. Figure 3 -Appendix Figure 4 The friction structure includes several friction balls 6 disposed inside the tank 7. In this embodiment, the size of the friction balls 6 is larger than the size of the flow structure, so that the flow structure can only flow the material to be stirred, while the friction balls 6 remain free to move within the tank 7 and cannot flow out of the tank 7 through the flow structure. By using friction balls 6 as the friction structure, when two friction balls 6 collide with each other, when friction balls 6 collide with the inner wall of the tank 7, or when friction balls 6 collide with the rotating guide mechanism inside the tank 7, the material to be stirred can be squeezed and dispersed, thereby improving the stirring and mixing effect.
[0044] And / or, see attached document Figure 6 -Appendix Figure 8 The friction structure includes several turbulence columns 702 disposed on the inner wall of the tank 7. In this embodiment, where the rotating flow guiding mechanism includes a rotating flow-around rib 8 disposed inside the tank 7, the rotating flow-around rib 8 can cause the material to be stirred to move spirally along the inner wall of the tank 7, impacting the turbulence columns 702 protruding from the inner wall of the tank 7, thereby creating a turbulence effect to achieve scouring-type multi-mixing and stirring.
[0045] Friction ball 6 and turbulence column 702 can be used individually or simultaneously. When both are used simultaneously, the number of friction balls 6 can be reduced.
[0046] In one embodiment, the rotary flow guiding mechanism includes rotary flow-encircling ribs 8 disposed within the tank 7. The rotary flow-encircling ribs 8 can be several vertically arranged ribs, several inclined ribs, or several ribs arranged in a spiral structure. In embodiments where the rotary flow guiding mechanism also includes a rotary impeller 10, the rotary flow-encircling ribs 8 can be several vertically arranged ribs. When the rotary flow guiding mechanism only includes the rotary flow-encircling ribs 8, the rotary flow-encircling ribs 8 need to have pumping capabilities to guide the material to be stirred in circulation; therefore, several inclined ribs or several ribs arranged in a spiral structure are used. In this case, the rotary flow-encircling ribs 8 are used to guide the material to be stirred in circulation and also to increase turbulence within the tank 7, enhancing the stirring effect.
[0047] In one embodiment, the rotary guide mechanism includes a rotary impeller 10 disposed outside the tank 7 and located outside the flow structure on one side. In this embodiment, the high-speed rotation of the rotary impeller 10 generates a strong pumping suction, thereby achieving the circulation of the material to be stirred. When the friction structure uses several friction balls 6, placing the rotary impeller 10 outside the tank 7 can prevent the friction balls 6 from impacting and damaging the rotary impeller 10. Preferably, the rotary impeller 10 is disposed on the side of the flow structure from which the material to be stirred flows out.
[0048] In one embodiment, a guide tube 703 is provided on the side wall of the tank 7 protruding outward from the rotating blade 10. By providing the guide tube 703, the pumping capacity of the rotating blade 10 can be improved and the pumping direction can be guided, thereby better realizing the circulation flow of the material to be stirred.
[0049] In one preferred embodiment, through holes 704 are provided on opposite side walls of the tank body 7;
[0050] The stirring device also includes a rotating shaft 3 rotatably mounted on two through holes 704 and extending out of the tank body 7 at both ends. One end of the rotating shaft 3 is located outside the object to be stirred and is connected to a coupling (not shown in the figure) for connecting to a motor to drive the rotating shaft 3 to rotate. At this time, the rotation of the rotating shaft 3 is fixedly achieved through the coupling of the motor. Therefore, the rotating shaft 3 can be in rotational engagement with the two through holes 704 or can be spaced apart from the two through holes 704.
[0051] The rotary flow guiding mechanism includes a rotary flow-encircling rib 8 disposed inside the tank 7 and fixed to the rotary shaft 3; and / or, the rotary flow guiding mechanism includes a rotary impeller 10 disposed outside the tank 7, located on one side of the flow structure, and fixed to the rotary shaft 3. That is, the rotary flow-encircling rib 8 and / or the rotary impeller 10 rotate via the rotary shaft 3. When the stirring device is used in a high-temperature environment, the performance requirements of the rotary drive devices for both can be reduced. Preferably, the rotary flow guiding mechanism includes a rotary flow-encircling rib 8 and a rotary impeller 10, that is, a single motor drives the rotary flow-encircling rib 8 and the rotary impeller 10 to rotate simultaneously, improving the stirring effect.
[0052] In one embodiment, the axis of the rotating shaft 3 is coaxial with the axis of the pot body 9, and the axial direction of the rotating shaft 3 points inward toward the bottom of the pot body 9.
[0053] The flow structure on the side where the material to be stirred flows in is a through hole 704, the diameter of which is larger than the diameter of the rotating shaft 3. At this time, the material to be stirred flows into the tank 7 from the inner wall of the through hole 704 and the outer wall of the rotating shaft 3, improving the suction effect. The flow structure on the side where the material to be stirred flows out is a plurality of flow holes 701 provided on the wall of the tank 7. At this time, the material to be stirred flows out into the tank 7 from the plurality of flow holes 701, improving the uniformity of pumping. The arrangement of the two flow structures in this embodiment can improve the circulation effect of the material to be stirred.
[0054] In one embodiment, the tank 7 is fixed above the pot body 9 by one or more fixing columns 2, which can avoid affecting the circulation of the material to be stirred and ensure the stability of the pot body 9.
[0055] This utility model also provides a smelting system that can be used to stir and smelt molten metal and reinforcing particles, including a heating device and the aforementioned stirring device, wherein the heating device is used to heat the molten metal and reinforcing particles during the stirring process.
[0056] In one embodiment, the heating device includes a graphite heater 4 disposed on the outside of the pot body 9 and an induction coil 5 sleeved on the outside of the graphite heater 4. When the induction coil 5 is energized, it heats the graphite heater 4, which then transfers the heat to the pot body 9. The combination of the graphite heater 4 and the induction coil 5 forms a heating device that enables rapid heating and controllable temperature.
[0057] In one embodiment, the smelting system further includes a feed pipe 1 for feeding reinforcing particles into the material to be stirred, the feed pipe 1 being disposed above the liquid level of the material to be stirred.
[0058] Taking molten aluminum alloy and silicon carbide reinforcing particles as the materials to be stirred, and friction balls as the friction structure, the melting system adds a certain amount of silicon carbide reinforcing particles through the feeding pipe 1 into the continuously and uniformly stirred molten aluminum alloy, thus dispersing them evenly throughout the composite material. The melting system requires a heating device to melt the aluminum alloy into a liquid state, while the silicon carbide reinforcing particles are continuously stirred after addition to achieve uniform mixing of the two.
[0059] The induction coil 5 heats up during operation, causing the graphite heater 4 to heat up as a whole. The pot body 9 is placed inside the graphite heater 4 and is heated by it. The aluminum alloy placed in the pot body 9 melts after reaching its melting point. The rotating shaft 3 rotates, causing the aluminum alloy to rotate. Friction balls 6 of a specific size are added to the tank body 7. After silicon carbide reinforcing particles are added to the molten aluminum alloy, the rotating shaft 3 continuously stirs the mixture, and the friction balls 6 disperse the added silicon carbide reinforcing particles.
[0060] Reference Appendix Figure 9 and attached Figure 10 Specifically, the molten aluminum alloy, driven by the high-speed rotation of the rotating blade 10, is pumped into the tank 7 along the rotating shaft 3 and the through-hole 704 above the tank body 7 by the pumping suction force. (See attached diagram) Figure 9 and attached Figure 10 (2-1). Under the action of the rotating flow-around rib 8, the molten aluminum alloy will mix with the friction balls 6 inside the tank 7 and move spirally downward along the circumference of the inner wall of the tank 7 (see appendix). Figure 9 and attached Figure 10 (2-2) During the movement, the aluminum alloy molten liquid is dispersed under the impact of friction balls 6 of different sizes (completing one stirring cycle). The mixed molten aluminum alloy will be filtered and sucked out from the flow hole 701 at the bottom of the tank 7 (see attached). Figure 9 and attached Figure 10 (2-3), while the friction ball 6 remains inside the tank 7, where secondary stirring is completed by the agitation and pumping action of the rotating blade 10 (see attached). Figure 9 and attached Figure 10 (2-4), and push the mixture to the bottom of the pot 9 and then spiral upwards along the inner wall of the pot 9 and the outer wall of the tank 7 (attached) Figure 9 and attached Figure 10 (2-5) Flows upwards, eventually forming a cycle.
[0061] Therefore, the friction ball 6 serves as the primary stirring medium, and the rotating blade 10 serves as the secondary stirring medium. This ensures thorough stirring and dispersion between the molten aluminum alloy and the silicon carbide reinforcing particles. The resulting sample exhibits uniform dispersion of the silicon carbide reinforcing particles within the aluminum alloy, with no significant agglomeration. The dispersion uniformity of the silicon carbide reinforcing particles exceeds 90%. This method achieves better dispersion than conventional stirring, with shorter stirring time and higher efficiency.
[0062] Preferably, the rotating shaft 3, friction ball 6, tank body 7, rotating flow rib 8, pot body 9, and rotating blade 10 are all made of silicon carbide, which effectively avoids the introduction of new impurities during the stirring and preparation of composite materials.
[0063] The smelting system proposed in this solution involves molten aluminum alloy and silicon carbide reinforcing particles being guided into a friction mechanism. Under the impetus of the rotating flow-around ribs 8, they are more concentrated and dispersed by the friction balls 6 within a narrow tank 7, forming the first stirring. The molten aluminum alloy and silicon carbide reinforcing particles undergo a second stirring as they flow through the channel of the rotating blades 10. This series-type double stirring solves the problems of poor wettability of molten aluminum alloy and silicon carbide reinforcing particles, uneven particle distribution, high porosity, and numerous oxide inclusions during the stirring process. It can greatly reduce the stirring time, save energy, and increase the number of times consumables can be used.
[0064] The above description is merely an embodiment and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solution of this utility model without departing from its scope. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model, without departing from its scope, should fall within the protection scope of this utility model.
Claims
1. An agitator characterized by, Includes the pot body (9), friction mechanism and rotary guide mechanism; The friction mechanism includes a tank (7) disposed inside the pot body (9) and a friction structure disposed inside the tank (7), and a flow structure is provided on both sides of the tank (7); The rotating guide mechanism is used to drive the material to be stirred to circulate between the inner wall of the pot body (9), between the inner wall of the pot body (9) and the outer wall of the tank body (7), the flow structure on one side, inside the tank body (7), and the flow structure on the other side.
2. The stirring device of claim 1, wherein The friction structure includes a plurality of friction balls (6) disposed inside the tank (7); and / or, the friction structure includes a plurality of turbulence columns (702) disposed on the inner wall of the tank (7).
3. The stirring device according to claim 1 or 2, characterized in that The rotating flow guiding mechanism includes a rotating flow-around rib (8) disposed inside the tank body (7).
4. The stirring device according to claim 1 or 2, wherein The rotary guide mechanism includes a rotary blade (10) disposed outside the tank body (7) and located on one side of the flow structure outside the flow structure.
5. The stirring device of claim 4, wherein A guide tube (703) is provided on the side wall of the tank (7) protruding outward from the rotating blade (10).
6. The mixing apparatus of any one of claims 1, 2 or 5, wherein the mixing apparatus is a mixer. The tank (7) has through holes (704) on its opposite side walls. It also includes a rotating shaft (3) that is rotatably disposed on the two through holes (704) and extends out of the tank body (7) at both ends; The rotating flow guiding mechanism includes a rotating flow-around rib (8) disposed inside the tank (7) and fixed on the rotating shaft (3); and / or, the rotating flow guiding mechanism includes a rotating blade (10) disposed outside the tank (7), located on one side of the flow structure, and fixed on the rotating shaft (3).
7. The stirring device of claim 6, wherein The axis of the rotating shaft (3) is coaxial with the axis of the pot body (9); The flow structure on the side where the material to be stirred flows in is the through hole (704), the diameter of which is larger than the diameter of the rotating shaft (3). The flow structure on the side where the material to be stirred flows out is a plurality of flow holes (701) provided on the wall of the tank (7).
8. A smelting system characterized by, It includes a heating device and a stirring device as described in any one of claims 1-7.
9. The smelting system of claim 8, wherein the smelting system is configured to produce the molten metal in the vessel. The heating device includes a graphite heater (4) disposed on the outside of the pot body (9) and an induction coil (5) sleeved on the outside of the graphite heater (4).
10. The smelting system of claim 8, wherein the smelting system is configured to produce the molten metal in the vessel. It also includes a feed pipe (1) for feeding reinforcing particles into the material to be stirred.