Stirring device

Abstract

The utility model is applicable to the field of material stirring, and provides a stirring device which is characterized in that a reciprocating mechanism, a motion conversion mechanism and a stirring mechanism are arranged in a material cylinder, and a liquid polishing medium is stored in the material cylinder; the end, penetrating out of the bottom of the material cylinder, of the reciprocating mechanism is connected with an external device, and the other end, located in the material cylinder, of the reciprocating mechanism is connected with the motion conversion mechanism which is connected with the stirring mechanism. The reciprocating mechanism reciprocates in the material cylinder under the action of an external device so as to change the fluid pressure in the material cylinder; the motion conversion mechanism can convert fluid pressure in the material cylinder into rotating force in the reciprocating motion execution process of the reciprocating mechanism so as to drive the stirring mechanism to rotate, and the liquid polishing medium is stirred through the rotating motion. According to the scheme provided by the utility model, the flowability of the liquid polishing medium can be ensured, the optimal concentration interval of the abrasive particles in the liquid polishing medium is strictly controlled, and the polishing effect of the abrasive particles on the complex inner flow channel is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of material stirring, and in particular relates to a stirring device. Background Art

[0002] Parts with complex internal flow channel structures are widely used in aerospace, shipbuilding, nuclear, automotive, mold and other industrial fields. In particular, parts related to fluid power systems often have complex internal cavity structures such as fine flow channels and deep holes, which play the role of transporting, exchanging or applying hydraulic pressure to gas and liquid fluids, such as aviation / aerospace / shipbuilding / automobile engine fuel nozzles, heat exchangers, hydraulic components, oil circuit control throttles, etc.

[0003] When polishing the complex internal flow channels of parts, common polishing methods, such as manual polishing, abrasive flow polishing, abrasive water jet polishing, magnetic polishing, magnetorheological polishing, ultrasonic polishing, chemical polishing, electrochemical polishing and plasma polishing, all show great limitations or cannot be polished at all. For example, the manual polishing method is limited by the accessibility of the polishing tool and can only handle the polishing of internal flow channels that are approximately straight and short in length; the abrasive flow technology uses semi-solid soft paste polishing media with relatively large rigidity to polish the inner cavity through the extrusion grinding mechanism. This creep fluid with extremely small Reynolds number is difficult to achieve uniform processing through complex long-range micro-channels, and is easy to be blocked at bends and dead corners. Forcing through will cause deformation of the flow channel or even cracking of the flow channel. Even if it barely passes through the internal flow channel with an aspect ratio of ≥50:1, the pressure and velocity will decrease sharply as the fluid travel increases, resulting in "over-polishing" of the internal flow channel port and "un-polishing" of the internal flow channel due to excessive pressure and flow rate losses. In addition, the water-insoluble colloidal abrasive flow medium tends to remain at the bends and dead corners of the inner flow channel, and it is difficult or even impossible to completely remove it. Although flexible processing methods such as chemical / electrochemical / plasma polishing / magnetic polishing / ultrasonic polishing can be used to polish the inner flow channels or holes with large diameters and straight directions, the principle of flexible processing is that the surface convex points and concave points will be processed at the same time, so these flexible processing methods can only make slight improvements to the surface brightening. Even if the amount of material removed is large, it cannot significantly improve the "step" effect of the inner flow channel surface, reduce the surface roughness, and peel off the powder, particles and burrs adhered to the surface on a large scale.

[0004] Referring to existing patents and technologies at home and abroad, it can be known that when the inner flow channel diameter of a part is < 3 mm, the length-diameter ratio ≥ 50:1, and the micro-complex inner flow channel with S-shaped bends, U-shaped bends, O-shaped bends, and spiral bends in three-dimensional space can be polished by water-based two-phase flow technology. However, the abrasive grains in the two-phase flow polishing medium remaining in the material cylinder will spontaneously settle to the bottom under the action of gravity, resulting in the stratification of the water-based two-phase flow medium in the material cylinder. As a result, it is impossible to ensure the uniform dispersion of abrasive grains during polishing and strictly control the optimal concentration range, seriously affecting the polishing effect of water-based two-phase flow. Therefore, a stirring device needs to be designed to overcome the many negative impacts brought about by the spontaneous settlement of abrasive grains in the water-based two-phase flow medium. Summary of the Invention

[0005] In order to solve the above problems existing in the related technologies, the present invention provides a stirring device. The technical problems to be solved by the present invention are realized through the following technical solutions:

[0006] A stirring device includes: a material cylinder, a reciprocating mechanism, a motion conversion mechanism, and a stirring mechanism; the reciprocating mechanism, the motion conversion mechanism, and the stirring mechanism are arranged inside the material cylinder, and a liquid polishing medium is stored inside the material cylinder; one end of the reciprocating mechanism passing through the bottom of the material cylinder is connected to an external device, the other end of the reciprocating mechanism located inside the material cylinder is connected to the motion conversion mechanism, and the motion conversion mechanism is connected to the stirring mechanism; wherein, the reciprocating mechanism can perform reciprocating motion inside the material cylinder under the action of the external device to change the fluid pressure of the liquid polishing medium; the motion conversion mechanism can convert the fluid pressure of the liquid polishing medium into a rotational force during the reciprocating motion of the reciprocating mechanism to drive the stirring mechanism to perform rotational motion, and stir the liquid polishing medium through the rotational motion.

[0007] The utility model has the following beneficial technical effects: By arranging a reciprocating mechanism, a motion conversion mechanism and a stirring mechanism in the material cylinder, and the reciprocating mechanism, the motion conversion mechanism and the stirring mechanism are connected in sequence; wherein, the reciprocating mechanism can perform linear reciprocating motion under the drive of an external force to change the fluid pressure inside the material cylinder, and the motion conversion mechanism connected to the reciprocating mechanism converts the fluid pressure of the liquid polishing medium inside the material cylinder into a rotational force, and this rotational force drives the stirring mechanism to perform rotational motion, so as to stir the liquid polishing medium at different positions inside the material cylinder, prevent the abrasives in the liquid polishing medium from spontaneously settling in the material cylinder, improve the fluidity of the liquid polishing medium, ensure the uniform distribution of the abrasives in the liquid polishing medium, avoid the blockage and cracking of the flow channel caused by the stratification of the water-based and abrasives in the liquid polishing medium, and avoid the problem of inaccurate monitoring of the flow velocity, flow rate and driving pressure difference of the liquid polishing medium in the inner flow channel during a processing cycle, and can ensure the uniform distribution of the abrasives during polishing, and strictly control the optimal concentration range of the abrasives in the liquid polishing medium, so as to ensure the polishing effect on the complex inner flow channel.

[0008] The following will further describe the present utility model in detail with reference to the drawings and embodiments. Brief Description of the Drawings

[0009] Figure 1 is a schematic structural diagram of the stirring device provided by the present utility model;

[0010] Figure 2 is a sectional structural diagram of the stirring device provided by the present utility model;

[0011] Figure 3 is a top view of the stirring device provided by the present utility model;

[0012] Figure 4 are the left view, front view and right view of a blade unit formed by assembling a blade and a handle provided by the present utility model.

[0013] Explanation of the Reference Numerals in the Drawings:

[0014] 1 - material cylinder; 2 - reciprocating mechanism; 3 - support rod; 4 - sealing bearing; 5 - rotating shaft; 6 - rotating blade. Detailed Embodiments

[0015] The following further describes the present utility model in detail with reference to specific embodiments, but the embodiments of the present utility model are not limited thereto.

[0016] Regarding the problem that the abrasive grains in the liquid polishing medium spontaneously settle in the material cylinder, causing the water-based two-phase flow medium in the material cylinder to stratify, and thus unable to ensure the uniform dispersion of abrasive grains during polishing, and strictly controlling the optimal concentration range, which seriously affects the polishing effect. Specifically, since the mass density of the solid-phase abrasive grains in the water-based two-phase flow is greater than that of the water-based liquid phase, the abrasive grains in the liquid polishing medium remaining in the material cylinder will spontaneously settle to the bottom of the material cylinder under the action of gravity. If the inner flow channel with a fine diameter and a large aspect ratio is thinner, and the material cylinder is larger with a larger storage capacity, the time for the liquid polishing medium to be pushed out of the material cylinder will be longer, and the spontaneous settlement effect of the abrasive grains during their movement in the material cylinder due to gravity will be more significant. During a processing cycle in which the liquid polishing medium in the material cylinder is filled and then completely emptied, at the beginning, the inner flow channel of the part flows through the liquid polishing medium with a uniform distribution of abrasive grain concentration, while later, the liquid polishing medium flowing through the inner flow channel of the part will have a significantly increased abrasive grain concentration. The liquid polishing medium will significantly reduce its fluidity due to the excessive concentration of abrasive grains, resulting in a decrease in flow velocity and polishing effect, and even blocking and bursting the flow channel. The spontaneous settlement of abrasive grains will also cause inaccurate monitoring of the flow velocity, flow rate, and driving pressure difference of the liquid polishing medium during the process of emptying the liquid polishing medium from the material cylinder, making it impossible to accurately judge the processing quality and effect of the inner flow channel online.

[0017] To solve the above problems, the present utility model provides a stirring device. By setting a reciprocating mechanism, a motion conversion mechanism, and a stirring mechanism in the material cylinder, the reciprocating mechanism, the motion conversion mechanism, and the stirring mechanism are fixedly connected in sequence. Among them, the reciprocating mechanism can perform linear reciprocating motion under the drive of an external force to change the fluid pressure of the liquid polishing medium inside the material cylinder. The motion conversion mechanism connected to the reciprocating mechanism converts the fluid pressure of the liquid polishing medium into a rotational force, and this rotational force drives the stirring mechanism to perform rotational motion, so as to realize stirring the liquid polishing medium at different positions inside the material cylinder, prevent the abrasive grains in the liquid polishing medium from spontaneously settling in the material cylinder, improve the fluidity of the liquid polishing medium, ensure the uniform dispersion of the abrasive grains in the liquid polishing medium, avoid blocking and bursting the flow channel caused by the stratification of the water-based and abrasive grains in the liquid polishing medium, and moreover, avoid the problem of inaccurate monitoring of the flow velocity, flow rate, and driving pressure difference of the liquid polishing medium in the inner flow channel during a processing cycle, and can ensure the uniform dispersion of the abrasive grains during polishing, and strictly control the optimal concentration range of the abrasive grains in the liquid polishing medium, ensuring the polishing effect on complex inner flow channels.

[0018] Please refer to Figures 1 to 4 as shown in Figure 1 which is a schematic structural diagram of the stirring device provided by the present utility model; Figure 2 which is a sectional structural diagram of the stirring device provided by the present utility model; Figure 3 which is a top view of the stirring device provided by the present utility model; Figure 4The left view, front view, and right view of a blade unit formed by assembling a blade and a handle provided by the present utility model.

[0019] As Figure 1 shown, a stirring device provided by the present utility model includes: a material cylinder, a reciprocating mechanism, a motion conversion mechanism, and a stirring mechanism; a reciprocating mechanism, a motion conversion mechanism, and a stirring mechanism are provided inside the material cylinder, and a liquid polishing medium is stored inside the material cylinder; one end of the reciprocating mechanism passing through the bottom of the material cylinder is connected to an external device, and the other end of the reciprocating mechanism located inside the material cylinder is connected to the motion conversion mechanism, and the motion conversion mechanism is connected to the stirring mechanism; wherein, the reciprocating mechanism can perform reciprocating motion inside the material cylinder under the action of an external device to change the fluid pressure of the liquid polishing medium; the motion conversion mechanism can convert the fluid pressure of the liquid polishing medium into a rotational force during the reciprocating motion of the reciprocating mechanism to drive the stirring mechanism to perform rotational motion, and stir the liquid polishing medium through the rotational motion.

[0020] The liquid polishing medium described in the present utility model can be a water-based two-phase flow polishing medium with abrasive particles, or other types of liquid polishing media. In the following, taking the liquid polishing medium in the material cylinder as a water-based two-phase flow polishing medium as an example, the stirring device provided by the present utility model will be further described.

[0021] Here, the reciprocating mechanism, the motion conversion mechanism, and the stirring mechanism are connected in sequence from top to bottom. A through hole is provided at the bottom of the material cylinder, and one end of the reciprocating mechanism is hermetically connected to an external device, and this external device can be a mechanical device performing linear reciprocating motion, such as a gear set, or an external electronic control device; it can also be an external hydraulic thrust device. This mechanical device or external electronic control device or external hydraulic thrust device can adjust the reciprocating speed of the reciprocating mechanism according to actual needs. Since there is no gap or the gap is very small between the reciprocating mechanism and the inside of the material cylinder, when the reciprocating mechanism performs reciprocating motion from top to bottom inside the material cylinder, it will bring extremely high pressure to the water-based two-phase flow polishing medium stored inside the material cylinder; along with the movement of the reciprocating mechanism and the conversion of the motion conversion mechanism, the stirring device will spontaneously rotate at a large torque under the drive of extremely high fluid pressure to stir the water-based two-phase flow polishing medium at different liquid level layers, ensuring that the abrasive particles in the water-based two-phase flow polishing medium are evenly distributed, and strictly controlling the optimal concentration range to prevent the abrasive particles in the water-based two-phase flow polishing medium from spontaneously settling under the influence of gravity in the material cylinder during the processing cycle.

[0022] Please continue to refer to Figures 1 to 4 shown, the reciprocating mechanism 2 includes: a piston disk and a piston rod, one end of the piston rod passes through the bottom of the material cylinder 1 and is connected to an external device (not shown in the figure), and the other end of the piston rod is fixedly connected to the piston disk located inside the material cylinder 1.

[0023] Please continue to refer toFigures 1 to 4 As shown in the figure, the stirring device includes a rotating blade 6 and a rotating shaft 5. Among them, the rotating blade 6 is arranged at one end of the rotating shaft 5, and the other end of the rotating shaft 5 is fixedly arranged on the motion conversion mechanism. Here, the rotating shaft 5 is threadedly fastened to the rotating blade 6. And both the rotating shaft 5 and the rotating blade 6 are made of polytetrafluoroethylene, which has the characteristics of being acid and alkali resistant, resistant to various organic solvents, and hardly reacting with any solvent, so it can avoid polluting the liquid polishing medium.

[0024] Here, the motion conversion mechanism 4 is a sealed bearing. One end of the rotating shaft 5 is embedded into the central hole of the sealed bearing 4 through a sealing ring to be fixedly connected to the sealed bearing 4. The material of the sealing ring is rubber or plastic. It should be noted that when the thickness of the sealing ring is too thick, the assembly strength will be reduced, and when the thickness is too thin, the sealing effect cannot be achieved due to insufficient extrusion deformation. After many engineering tests, it is found that when the thickness of the sealing ring is 2 mm to 5 mm, it can not only meet the good assembly strength but also achieve the sealing effect.

[0025] Here, the material of the sealed bearing is carbon steel, stainless steel, polymer or ceramic, and aluminum alloy is preferred. More preferably, a micro-arc oxidation ceramic coating can be added on the basis of aluminum alloy. The way of in-situ growth and metallurgical bonding of the micro-arc oxidation ceramic coating on the metal base of aluminum alloy has a very strong bonding force. The coating can be used in the two-phase flow polishing medium for a long time without being damaged or falling off, and is extremely corrosion-resistant and wear-resistant. The aluminum alloy base material can be selected as aviation series 7 (7075) aluminum alloy. 7075 aluminum alloy has a relatively high hardness (140 HB - 150 HB) and strength, and 7075 aluminum alloy is lighter in weight, which is sufficient to overcome the fluid pressure brought by the reciprocating motion, and is more suitable for the service conditions of the sealed bearing in the material cylinder, and can significantly improve the life and reliability of the sealed bearing.

[0026] Here, the rotating blade 6 uses the pressure provided by the fluid as the driving force and the torque level as the performance index. As Figure 3 shown in the figure, the rotating blade includes a plurality of handles and a plurality of blades corresponding to the plurality of handles one by one. The shape of each blade is a trapezoid body. One end of each handle is arranged at one end of the rotating shaft, and the other end is fixedly installed with a corresponding blade. Among them, when the blade rotates, the upper bottom surface of the blade is in the rotating forward direction. Here, the connection position between the handle and the blade is on the side surface of the trapezoid body and close to the center position of the lower bottom edge, and the two are fixedly connected by welding. By setting the blade as a trapezoid body and making the upper bottom surface of the blade in the rotating forward direction when the blade rotates, on the one hand, the resistance during rotation can be reduced to achieve high-speed rotation, and on the other hand, the stirring area of the blade can be increased, so as to achieve sufficient stirring.

[0027] In a possible implementation, in order to further reduce the resistance when the blade rotates and ensure sufficient tangential force in the horizontal direction of the blade, thereby further increasing the rotation speed of the rotating blade, the shape of each blade can also be a curved hollow trapezoid body, wherein the surfaces between the upper bottom surface and the lower bottom surface of the curved hollow trapezoid body are all curved surfaces. Exemplarily, Figure 4 are the left view, front view, and right view of a blade unit formed by assembling a blade and a handle provided by the present utility model. As Figure 4 shown, the shape of the blade is a curved hollow trapezoid body, and the upper bottom of the blade (i.e., Figure 4 the c-f segment in Figure 4 ) is thinner, which can reduce the resistance during rotation and achieve high-speed rotation; the lower bottom of the blade (i.e., Figure 4 the a-e segment in ) is wider or thicker, which can increase the stirring area and thus achieve sufficient stirring. The curved hollow trapezoid body can be prepared by 3D printing, and the wall thickness of the hollow trapezoid body is preferably 0.5 mm.

[0028] In a possible implementation, the handle is a solid cylinder, and the diameter range is 0.8 cm to 1.5 cm. Figure 4 The curve of the a-c segment in 2 satisfies the equation y = ax Figure 4 + c; wherein, the value range of a is 0.25 to 0.9, and the value range of c is 6 to 9; 2 The curve of the e-f segment in Figure 4 satisfies the equation y = ex

[0029] + f; wherein, the value range of e is 0.97 to 1.64, and the value range of f is 3 to 5. In addition, it is known from engineering tests that when the thickness of the upper bottom (c-f segment) of the trapezoid body is in the range of 0.5 mm to 1.0 mm, the thickness of the lower bottom (a-e segment) is in the range of 1.5 to 3.5 mm, and the height H is in the range of 8 to 12 cm, both the effect of small resistance and sufficient stirring can be achieved.

[0029] In a possible implementation, the number of blades in the rotating blade is 3 to 6, and the corresponding number of handles is also 3 to 6.

[0030] Considering that when the rotation radius of the blade is too small, only the liquid polishing medium at the center of the material cylinder can be sufficiently stirred, while the liquid polishing medium near the wall of the material cylinder is not sufficiently stirred; and considering that when the rotation radius of the blade is too large, the resistance is large, and the edge of the blade is prone to friction with the wall of the material cylinder, thereby damaging the blade. In order to achieve sufficient stirring of the liquid polishing medium and increase the service life of the rotating blade, in some embodiments, the rotation radius of the rotating blade and the cylinder diameter of the material cylinder satisfy the following size relationship: the rotation radius of the rotating blade is less than or equal to seven-eighths times the cylinder diameter of the material cylinder and greater than or equal to three-fourths times the cylinder diameter of the material cylinder.

[0031] Here, the rotational speed of the rotating blade is affected by the fluid pressure brought by the reciprocating mechanism. The greater the pressure, the greater the rotational force output by the motion conversion mechanism. Therefore, the higher the rotational speed of the rotating blade, the more sufficient the stirring. And, taking the water-based two-phase flow polishing medium as an example, the sedimentation speed of the abrasive grains in the water-based two-phase flow polishing medium is related to the density of the abrasive grains. The greater the density, the faster the sedimentation. Through multiple engineering tests, it is obtained that the rotational speeds required for the abrasive grains of water-based two-phase flow polishing media with different densities to be mixed evenly are different, and the required fluid pressures are also different. The specific data are shown in Table 1. By controlling the reciprocating speed of the reciprocating mechanism, different fluid pressures can be achieved. And under different abrasive grain densities, different fluid pressures can achieve different blade rotational speeds, thereby ensuring that the water-based two-phase flow polishing medium is always in the optimal abrasive grain concentration range, avoiding the inaccuracy in monitoring the flow rate and driving pressure difference of the polishing medium in the inner flow channel during a processing cycle, and thus ensuring the accurate online judgment of the processing quality and effect of the inner flow channel.

[0032] Table 1

[0033] <![CDATA[Abrasive density (g / cm 3 )]]> 1～2 2～3 3～4 4～5 Blade rotation speed (r / min) 120～160 160～240 240～360 360～450 Fluid pressure (MPa) 3.5～5 5～7 7～10 10～15

[0034] Please continue to refer to Figure 1 and Figure 2 As shown, the stirring device further includes: a support rod 3; the reciprocating mechanism 2 and the stirring mechanism are fixedly connected through the support rod 3. Among them, the support rod 3 is connected to the reciprocating mechanism 2 by means of screw fastening. Specifically, a base is added at the bottom end of the support rod 3, and 4 to 6 screws are used to threadedly fasten the reciprocating mechanism 2 around the base.

[0035] Here, when processing a microscopically complex inner flow channel with an inner flow channel diameter < 3 mm, a length-to-diameter ratio ≥ 50:1 and a three-dimensional spatial orientation including S-shaped bends, U-shaped bends, O-shaped bends, and spiral bends, the liquid polishing medium stored in the material cylinder is a water-based two-phase flow polishing medium; and, an outlet is further provided at the top of the material cylinder, and the outlet is connected to the inlet of the inner flow channel of the workpiece to be processed, for inputting the water-based two-phase flow polishing medium into the inner flow channel to process the inner flow channel.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] The above description shows and describes several preferred embodiments of the present utility model. However, as mentioned before, it should be understood that the present utility model is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept of the present utility model herein through the above teachings or the techniques or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A stirring device, characterized in that: include: Cylinder, reciprocating mechanism, motion conversion mechanism, stirring mechanism; The reciprocating mechanism, the motion conversion mechanism and the stirring mechanism are arranged inside the material cylinder, and liquid polishing medium is stored inside the material cylinder; One end of the reciprocating mechanism passing through the bottom of the material cylinder is connected to an external device, and the other end of the reciprocating mechanism located inside the material cylinder is connected to the motion conversion mechanism, and the motion conversion mechanism is connected to the stirring mechanism; Among them, the reciprocating mechanism can reciprocate inside the material cylinder under the action of the external device to change the fluid pressure of the liquid polishing medium; the motion conversion mechanism can convert the fluid pressure of the liquid polishing medium into a rotational force during the reciprocating motion of the reciprocating mechanism, so as to drive the stirring mechanism to rotate and stir the liquid polishing medium through the rotational motion.

2. The stirring device according to claim 1, characterized in that: The stirring device comprises: a rotating blade and a rotating shaft; wherein the rotating blade is arranged at one end of the rotating shaft, and the other end of the rotating shaft is fixedly arranged on the motion conversion mechanism.

3. The stirring device according to claim 2, characterized in that: The motion conversion mechanism is a sealed bearing, and one end of the rotating shaft is embedded in the central hole of the sealed bearing through a sealing ring to be fixedly connected to the sealed bearing.

4. The stirring device according to claim 2, characterized in that: The rotating blade includes: a plurality of handles, and a plurality of blades corresponding to the plurality of handles one by one, each blade is in the shape of a trapezoid, one end of each handle is arranged at one end of the rotating shaft, and the other end is fixedly mounted to a corresponding blade, wherein when the blade rotates, the upper bottom surface of the blade is in the rotating forward direction.

5. The stirring device according to claim 4, characterized in that: Each blade is in the shape of a curved hollow trapezoid, wherein the surface between the upper bottom surface and the lower bottom surface of the curved hollow trapezoid is a curved surface.

6. The stirring device according to claim 4, characterized in that: The upper base thickness of the trapezoidal body is within the range of 0.5 mm to 1.0 mm, the lower base thickness is within the range of 1.5 mm to 3.5 mm, and the height is within the range of 8 cm to 12 cm.

7. The stirring device according to claim 2, characterized in that: The rotation radius of the rotating blade and the cylinder diameter of the material cylinder satisfy the following size relationship: The rotation radius of the rotating blade is less than or equal to seven eighths of the cylinder diameter of the material cylinder, and greater than or equal to three quarters of the cylinder diameter of the material cylinder.

8. The stirring device according to claim 1, characterized in that: The stirring device further comprises: a support rod; the reciprocating mechanism and the stirring mechanism are fixedly connected via the support rod, wherein the support rod is connected to the reciprocating mechanism by means of threaded fastening.

9. The stirring device according to claim 1, characterized in that: The reciprocating mechanism includes: a piston disc and a piston rod, one end of the piston rod passes through the bottom of the cylinder and is connected to the external device, and the other end of the piston rod is fixedly connected to the piston disc located inside the cylinder.

10. The stirring device according to claim 4, characterized in that: The number of the blades in the rotating blades is 3 to 6.

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