Stirring paddle and homogenizing equipment

Abstract

The utility model provides a stirring paddle and homogenizing equipment, and the stirring paddle comprises a rotating shaft which can rotate around the axis of the rotating shaft; and the multiple bluff bodies are connected with the rotating shaft, the multiple bluff bodies extend linearly, the extending directions of the multiple bluff bodies are the same, and the diameters / equivalent diameters of at least two bluff bodies are different. According to the stirring paddle disclosed by the utility model, the plurality of linearly extending bluff bodies are connected between the rotating shafts or indirectly, and the diameters / equivalent diameters of the at least two bluff bodies are different, so that shearing forces with different sizes can be realized by utilizing the bluff bodies with different diameters in a stirring process, and eddy currents with different sizes are generated; the vortex with various sizes mutually influence and jointly act to aggravate the disturbance of the slurry, so that the raw materials are quickly and uniformly mixed, the dispersion efficiency is improved, the time required by stirring is shortened, and the energy consumption required by stirring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial manufacturing, and more specifically, to a stirring paddle and a homogenizing device. Background Art

[0002] In the related art, homogenization is a crucial process in the battery production process, which involves uniformly mixing lithium battery active material, conductive agent, binder, other additives and solvent, etc. The quality of homogenization directly affects the performance of the battery. Therefore, the homogenizing device occupies a very crucial position in the battery manufacturing equipment. The existing homogenizing device usually uses a stirring paddle rotating at a high speed to generate turbulent disturbance to the slurry for the purpose of dispersion. However, this method requires a relatively long pulping time for the high-speed rotation of the stirring paddle, and the dispersion efficiency is low, making it difficult to meet the slurry demand for large-scale production of the production line. In addition, high-speed dispersion also means high energy consumption, thus increasing the production cost. Summary of the Utility Model

[0003] The utility model provides a new technical solution for a stirring paddle, which can at least solve one of the problems of low dispersion efficiency and high energy consumption of the stirring paddle in the prior art.

[0004] The utility model also provides a homogenizing device, including the above-mentioned stirring paddle.

[0005] According to the first aspect of the utility model, there is provided a stirring paddle, including: a rotating shaft, which is rotatable around its own axis; a plurality of blunt bodies, the plurality of blunt bodies are respectively connected to the rotating shaft, the plurality of blunt bodies linearly extend and have the same extending direction, and the diameters / equivalent diameters of at least two of the blunt bodies are different.

[0006] Optionally, the plurality of blunt bodies are spaced apart in the radial direction and / or circumferential direction of the rotating shaft.

[0007] Optionally, the diameter / equivalent diameter of each blunt body is the same at each location in its own extending direction.

[0008] Optionally, the diameter / equivalent diameter D of the blunt body is 5 mm to 500 mm.

[0009] Optionally, the extending direction of the blunt body is parallel to the axial direction of the rotating shaft.

[0010] Optionally, the blunt body extends linearly or along a curve.

[0011] Optionally, the cross-section of the blunt body is circular, oval, triangular, quadrilateral, polygonal or irregular.

[0012] Optionally, at least two of the blunt bodies are arranged at intervals in the radial direction of the rotating shaft and form a blunt body group, and the diameters / equivalent diameters of the multiple blunt bodies in the blunt body group are different.

[0013] Optionally, in the direction from the inside to the outside of the rotating shaft, the diameters / equivalent diameters of the multiple blunt bodies in the blunt body group gradually increase or decrease.

[0014] Optionally, in the blunt body group, the distances between adjacent two of the blunt bodies are the same or different.

[0015] Optionally, in the blunt body group, the diameter / equivalent diameter of the blunt body with the largest diameter among the multiple blunt bodies is D max , and the distance between adjacent two of the blunt bodies is d, d = D max ~10*D max 。

[0016] Optionally, the stirring paddle further includes: a connecting member, the connecting member extends in the radial direction of the rotating shaft, and the multiple blunt bodies in the blunt body group are respectively connected to the connecting member and cooperate with the connecting member to form a paddle blade.

[0017] Optionally, the connecting member includes: a first beam and a second beam, the first beam and the second beam are arranged at intervals along the axial direction of the rotating shaft, the first beam and the second beam respectively extend in the radial direction of the rotating shaft and are connected to the rotating shaft, the first beam is connected to one end of the blunt body, and the second beam is connected to the other end of the blunt body; a third beam, the third beam extends along the axial direction of the rotating shaft, one end of the third beam is connected to the end of the first beam away from the rotating shaft, and the other end of the third beam is connected to the end of the second beam away from the rotating shaft.

[0018] Optionally, the connecting member includes:

[0019] a connecting beam, the connecting beam extends in the radial direction of the rotating shaft, and the end or middle part of the blunt body is connected to the connecting beam.

[0020] Optionally, the number of the paddle blades is multiple.

[0021] Optionally, the multiple paddle blades at least include a first paddle blade and a second paddle blade. In the direction from the inside to the outside of the rotating shaft, the diameters / equivalent diameters of the multiple blunt bodies in the first paddle blade gradually increase, and the diameters / equivalent diameters of the multiple blunt bodies in the second paddle blade gradually decrease.

[0022] Optionally, the multiple paddle blades are evenly arranged at intervals along the circumferential direction of the rotating shaft.

[0023] Optionally, the multiple paddle blades overlap in the axial direction of the rotating shaft.

[0024] According to a second aspect of the present utility model, there is provided a homogenizing device, including the stirring paddle described in any one of the above embodiments.

[0025] According to the stirring paddle of the present utility model, a plurality of linearly extending blunt bodies are connected between or indirectly on the rotating shaft, and at least two blunt bodies have different diameters / equivalent diameters. Different shear forces can be achieved by using blunt bodies with different diameters during the stirring process to generate eddies of different sizes. The interaction and co-action of eddies of various sizes can intensify the disturbance of the slurry, enabling the raw materials to be quickly and evenly mixed, which is beneficial to improving the dispersion efficiency, thereby reducing the stirring time required and the energy consumption required for stirring.

[0026] Other features and advantages of the present utility model will become clear through the following detailed description of exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present utility model and, together with the description thereof, are used to explain the principles of the present utility model.

[0028] Figure 1 is a schematic diagram of the stirring paddle according to Embodiment 1 provided by the present utility model;

[0029] Figure 2 is a schematic diagram of the stirring paddle according to Embodiment 2 provided by the present utility model;

[0030] Figure 3 is a schematic diagram of the stirring paddle according to Embodiment 3 provided by the present utility model;

[0031] Figure 4 is a schematic diagram of the stirring paddle according to Embodiment 4 provided by the present utility model;

[0032] Figure 5 is a projection schematic diagram of the developed surface of the rotating shaft and the blade of the stirring paddle according to Embodiment 1 provided by the present utility model.

[0033] REFERENCE NUMERALS

[0034] 100, stirring paddle; 10, rotating shaft; 11, axis; 12, mounting surface; 13, developed surface; 20, blade; 20a, first blade; 20b, second blade; 21, blunt body group; 211, blunt body; 22, connecting member; 221, first beam; 222, second beam; 223, third beam; 224, connecting beam; 23, projection; 200, driving member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present utility model or its application or use.

[0037] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0038] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0040] First, the stirring paddle 100 according to an embodiment of the present utility model will be specifically described below with reference to the accompanying drawings.

[0041] As Figures 1 to 4 shown, the stirring paddle 100 according to an embodiment of the present utility model includes: a rotating shaft 10 and a plurality of blunt bodies 211.

[0042] Specifically, the rotating shaft 10 is rotatable about its own axis 11. The plurality of blunt bodies 211 are respectively connected to the rotating shaft 10, the plurality of blunt bodies 211 linearly extend respectively and in the same extending direction, and the diameters / equivalent diameters of at least two blunt bodies 211 are different.

[0043] In other words, the stirring paddle 100 according to an embodiment of the present utility model is mainly composed of the rotating shaft 10 and the plurality of blunt bodies 211.

[0044] Among them, the rotating shaft 10 can rotate, and the rotation center line of the rotation of the rotating shaft 10 coincides with the axis 11 of the rotating shaft 10 itself. Optionally, the rotating shaft 10 can be connected to the driving member 200 and rotate under the drive of the driving member.

[0045] There can be N bluff bodies 211 connected to the rotating shaft 10, where N can be an integer greater than or equal to 2. It should be noted that the connection between the bluff body 211 and the rotating shaft 10 can be a direct connection or an indirect connection, which is not limited here. For example, a part of the N bluff bodies 211 can be directly connected to the rotating shaft 10, and another part can be indirectly connected to the rotating shaft 10 through a connection structure, or the N bluff bodies 211 can be directly connected to the rotating shaft 10, or the N bluff bodies 211 can all be indirectly connected to the rotating shaft 10 through a connection structure.

[0046] It should be noted that the bluff body 211 is a non-fluid. When an object with this shape moves in a fluid, flow separation will occur at the boundary of the bluff body 211, a broad wake will be generated at the rear, and vortex shedding (which may be periodic or non-periodic) will occur. Therefore, during the stirring process of the stirring paddle 100, when the bluff body 211 moves in the slurry, the bluff body 211 can respectively generate vortices in the slurry.

[0047] The bluff body 211 can extend linearly. That is to say, the shape of the bluff body 211 can be extended along a certain line, and this line can include but is not limited to a straight line, a curve, and a broken line. For example, the bluff body 211 can be a straight long condition, or a bent or curved long condition. In addition, the linear extension directions of the N bluff bodies 211 are the same, that is, the N bluff bodies 211 can extend along the same kind of line.

[0048] In addition, at least two of the N bluff bodies 211 have different diameters / equivalent diameters. When N = 2, the two bluff bodies 211 have different diameters / equivalent diameters. When N > 2, M bluff bodies 211 have different diameters / equivalent diameters, where 2 ≤ M ≤ N.

[0049] It should be noted that when the bluff body 211 is a cylinder, the diameter of the bluff body 211 can be the diameter of the cylinder. When the bluff body 211 is not a cylinder, the cross-section of the bluff body 211 can be a special-shaped cross-section, and the equivalent diameter of the bluff body 211 can refer to the diameter of a circular cross-section with the same cross-sectional area as the special-shaped cross-section.

[0050] When the diameters / equivalent diameters of two bluff bodies 211 are different, different sizes of eddy currents and shear forces will be generated when these two bluff bodies 211 stir the slurry. The bluff body 211 with a large diameter can generate a larger main flow, and the bluff body 211 with a small diameter can trigger a more delicate local flow in the main flow. The combined action of the two flows can enhance the perturbation of the slurry and improve the mixing uniformity of the slurry. And the enhanced perturbation of the slurry can improve the mixing efficiency of the slurry, reduce the time required for stirring, and thus reduce energy consumption.

[0051] When the diameters / equivalent diameters of multiple bluff bodies 211 are different, the sizes of the eddy currents and the shear forces generated when the bluff bodies 211 with different diameters / equivalent diameters rotate are different. The eddy currents of various sizes affect each other in space, which can intensify the agitation of the slurry, enabling the slurry to be quickly and evenly dispersed.

[0052] Therefore, for the stirring paddle 100 according to the embodiment of the present invention, a plurality of linearly extended bluff bodies 211 are connected between or indirectly on the rotating shaft 10, and the diameters / equivalent diameters of at least two bluff bodies 211 are set to be different. Different shear forces can be achieved by using the bluff bodies 211 with different diameters during the stirring process to generate eddy currents of different sizes. The eddy currents of various sizes interact with each other and act together, which can intensify the agitation of the slurry, enabling the raw materials to be quickly and evenly mixed, facilitating the improvement of the dispersion efficiency, thereby reducing the time required for stirring and lowering the energy consumption required for stirring.

[0053] According to an embodiment of the present invention, the plurality of bluff bodies 211 are spaced apart in the radial direction and / or circumferential direction of the rotating shaft 10. Specifically, it may include but is not limited to the following several situations.

[0054] Situation 1: Some or all of the plurality of bluff bodies 211 are spaced apart in the radial direction of the rotating shaft 10;

[0055] Situation 2: Some or all of the plurality of bluff bodies 211 are spaced apart in the circumferential direction of the rotating shaft 10;

[0056] Situation 3: Some of the plurality of bluff bodies 211 are spaced apart in the radial direction of the rotating shaft 10, and another part of the plurality of bluff bodies 211 are spaced apart in the circumferential direction of the rotating shaft 10;

[0057] Situation 4: The plurality of bluff bodies 211 are not divided into a plurality of radial groups. Each radial group includes at least two bluff bodies 211 arranged at intervals in the radial direction of the rotating shaft 10, and the plurality of radial groups are arranged at intervals in the circumferential direction of the rotating shaft 10.

[0058] In the above four situations, whether the bluff bodies 211 are spaced apart in the radial direction of the rotating shaft 10 or in the circumferential direction of the rotating shaft 10, when the stirring paddle 100 rotates and stirs the slurry, the eddy currents of different sizes caused by the bluff bodies 211 with different diameters / equivalent diameters can interfere in space, intensify the agitation of the slurry, and achieve the purpose of efficient dispersion.

[0059] In addition, by setting the bluff bodies 211 to be spaced apart from each other, a channel for the slurry to pass through can be formed between adjacent bluff bodies 211, providing space for the generation and mutual interference of the eddy currents.

[0060] According to some other embodiments of the present invention, the diameter / equivalent diameter of each bluff body 211 at each location along its own extension direction is the same, that is, the diameter of each bluff body 211 is uniform.

[0061] Specifically, any plane perpendicular to the extension direction of the bluff body 211 is used as the section plane, and the diameter / equivalent diameter of the cross section obtained by sectioning the bluff body 211 is equal. When the bluff body 211 extends along a straight line, the section plane can be a plane perpendicular to the straight line. When the bluff body 211 extends along a curve, the section plane can be a plane perpendicular to a tangent line at any point of the curve.

[0062] In this embodiment, when the bluff body 211 with uniform diameter moves in the flow, the fluid pressure and shear force on its surface are relatively uniformly distributed, and this characteristic makes the movement of the bluff body 211 in the fluid more stable, which is conducive to reducing the energy consumption required for the movement of the bluff body 211. In addition, the bluff body 211 with uniform diameter also has the advantage of being easy to process and manufacture, which is conducive to reducing the manufacturing cost of the stirring paddle 100, and at the same time has good strength and stability, and its structural strength distribution is more uniform, and there is no stress concentration problem caused by diameter changes.

[0063] In some specific embodiments of the present invention, the diameter / equivalent diameter D of the bluff body 211 is 5 mm to 500 mm.

[0064] Setting the diameter / equivalent diameter of the bluff body 211 to ≥5 mm is beneficial to improving the strength of the bluff body 211 and preventing the bluff body 211 from breaking during the stirring process. Setting the diameter / equivalent diameter of the bluff body 211 to ≤500 mm can avoid the cross-sectional area of ​​the bluff body 211 being too large, which is beneficial to reducing the volume of the bluff body 211 and increasing the amount of slurry stirred at a single time, thereby facilitating improving the stirring efficiency.

[0065] According to some optional embodiments of the utility model, the extension direction of the bluff body 211 is parallel to the axial direction of the rotating shaft 10, so that a more uniform and stable flow field can be formed during the rotation of the stirring paddle 100, which helps to mix the substances in the liquid more quickly and evenly, thereby improving the stirring efficiency. In particular, in industrial processes that require efficient mixing, this arrangement can significantly shorten the stirring time and improve production efficiency.

[0066] In addition, the power required for the stable flow field during rotation is also more stable. This helps to reduce energy loss during the stirring process, reduce energy consumption, and thus reduce production costs. In addition, the structure of the bluff body 211 being parallel to the rotating shaft 10 is simple and easy to manufacture, which helps to reduce equipment costs.

[0067] In addition, there is better structural support between the bluff body 211 arranged in parallel and the rotating shaft 10, making the stirring paddle 100 more stable during high-speed rotation. This stability helps to reduce the vibration and sway of the stirring paddle 100, reduce the failure rate of the equipment, and extend the service life.

[0068] According to some other embodiments of the present invention, the bluff body 211 extends in a straight line or in a curve.

[0069] When the bluff body 211 extends in a straight line, the extension direction of the bluff body 211 can be parallel to the axial direction of the rotating shaft 10 or intersect with the axial direction of the rotating shaft 10. This kind of bluff body 211 has the advantage of being easy to manufacture. When the bluff body 211 extends in a curve, the curve can include but is not limited to an S shape and an arc shape. When the vortices formed by this kind of bluff body 211 interfere, more violent chaos can occur, which can make the dispersion more uniform and improve the dispersion efficiency.

[0070] In some specific embodiments of the present invention, the cross-section of the bluff body 211 is circular, elliptical, triangular, quadrilateral, polygonal or irregular.

[0071] The above-mentioned bluff bodies 211 corresponding to the cross-sections are all non-fluid, which can cause the fluid to form flow separation at the boundary of the bluff body 211, and a broad wake will be generated at the rear, accompanied by vortex shedding (which may be periodic or non-periodic). Therefore, during the stirring process of the stirring paddle 100, when the blade 20 moves in the slurry, the bluff body 211 can respectively cause vortices in the slurry.

[0072] Setting the cross-section of the bluff body 211 to be circular can simplify the processing process of the bluff body 211 and reduce the processing cost of the bluff body 211. Setting the cross-section of the bluff body 211 to be elliptical is beneficial to reducing the resistance during the stirring process, thereby reducing the work required for stirring, and further reducing the energy consumption. Setting the cross-section of the bluff body 211 to be triangular, quadrilateral, polygonal or irregular can make the vortices formed by the fluid flowing through the bluff body 211 more violent, make the dispersion of the slurry more uniform, and improve the dispersion efficiency.

[0073] According to some alternative embodiments of the present invention, at least two bluff bodies 211 are arranged at intervals in the radial direction of the rotating shaft 10 and form a bluff body group 21, and the diameters / equivalent diameters of the multiple bluff bodies 211 in the bluff body group 21 are different.

[0074] In other words, the stirring paddle 100 of this embodiment can include at least one bluff body group 21. Each bluff body group 21 can include n bluff bodies 211, where n can be an integer greater than or equal to 2. These n bluff bodies 211 can be arranged at intervals in the radial direction of the rotating shaft 10, and the diameters / equivalent diameters of these n bluff bodies 211 are different.

[0075] During the stirring process of the stirring paddle 100, n blunt bodies 211 spaced apart in the radial direction of the rotating shaft 10 can generate eddies of different sizes on the rotating shaft 10. As the n blunt bodies 211 rotate around the axis 11 of the rotating shaft 10, the continuously generated eddies can diffuse radially and interfere with each other, thereby achieving the purpose of quickly dispersing the slurry.

[0076] According to some other embodiments of the present invention, in the direction from the inside to the outside of the rotating shaft 10, the diameters / equivalent diameters of the multiple blunt bodies 211 in the blunt body group 21 gradually increase or decrease.

[0077] For the convenience of description, the side of the blunt body 211 facing the axis 11 of the rotating shaft 10 can be defined as the inner side of the blunt body 211, and the side of the blunt body 211 away from the axis 11 of the rotating shaft 10 can be defined as the outer side of the blunt body 211. In a single blunt body group 21, the diameters / equivalent diameters of the n blunt bodies 211 can gradually increase from the inside to the outside, or the diameters / equivalent diameters of the n blunt bodies 211 can gradually decrease from the inside to the outside.

[0078] For example, as Figures 1 to 3 shown, the blunt body group 21 can include three blunt bodies 211, and the three blunt bodies 211 can all be cylindrical. Among them, the diameter of the blunt body 211 closest to the rotating shaft 10 is the largest, the diameter of the middle blunt body 211 is medium, and the diameter of the blunt body 211 farthest from the rotating shaft 10 is the smallest.

[0079] Or as Figure 4 shown by the blunt body group 21 in the lower left, the three blunt bodies 211 can all be cylindrical. Among them, the diameter of the blunt body 211 closest to the rotating shaft 10 is the smallest, the diameter of the middle blunt body 211 is medium, and the diameter of the blunt body 211 farthest from the rotating shaft 10 is the largest.

[0080] In this embodiment, setting the diameters / equivalent diameters of the multiple blunt bodies 211 in the blunt body group 21 to gradually increase or gradually decrease from the inside to the outside is beneficial to intensify the disturbance of the slurry and improve the dispersion efficiency.

[0081] In some specific embodiments of the present invention, in the blunt body group 21, the distances between adjacent two blunt bodies 211 are the same or different.

[0082] Specifically, the distance between adjacent two blunt bodies 211 can be the shortest distance between adjacent two blunt bodies 211, or can be the distance between the two blunt bodies 211 in the radial direction of the rotating shaft 10. For example, when the blunt body 211 is cylindrical and is arranged parallel to the rotating shaft 10, the distance between adjacent two blunt bodies 211 can be the shortest distance between the respective axes of the two blunt bodies 211.

[0083] Among the n bluff bodies 211 of the bluff body group 21, the distance between the i-th bluff body 211 and the (i + 1)-th bluff body 211 can be d1, and the distance between the (i + 1)-th bluff body 211 and the (i + 2)-th bluff body 211 can be d2. i can be an integer satisfying ≤ n - 2 and ≥ 1. d1 and d2 can be the same or different.

[0084] Setting d1 equal to d2 can form a plurality of regularly arranged bluff bodies 211 in the bluff body group 21, which is convenient for processing the stirring paddle 100 and reduces the manufacturing cost of the stirring paddle 100.

[0085] Setting d1 and d2 to be different can make the distances between the vortices formed by different bluff bodies 211 different, intensify the disturbance of the slurry, be conducive to more uniform dispersion of the slurry, improve the stirring efficiency and reduce the stirring energy consumption.

[0086] According to some alternative embodiments of the present invention, in the bluff body group 21, for the bluff body 211 with the largest diameter / equivalent diameter among the plurality of bluff bodies 211, the diameter is Dmax, and the distance between two adjacent bluff bodies 211 is d, where d = Dmax to 10 * Dmax.

[0087] Specifically, the distance between two adjacent bluff bodies 211 can be the shortest distance between these two bluff bodies 211, or can be the distance between the two bluff bodies 211 in the radial direction of the rotating shaft 10.

[0088] Setting d ≥ Dmax can increase the spacing between two adjacent bluff bodies 211, increase the amount of slurry passing through this gap, be conducive to reducing the resistance during stirring, and avoid excessive resistance during stirring due to too small a spacing.

[0089] Setting d ≤ 10 * Dmax can avoid too large a spacing between two adjacent bluff bodies 211. When the capacity of the stirring container is certain, more bluff bodies 211 can be arranged in the bluff body group 21 to form more vortices, thereby increasing the interference between the vortices and being conducive to improving the dispersion efficiency.

[0090] According to some other embodiments of the present invention, the stirring paddle 100 further includes a connecting member 22. The connecting member 22 extends in the radial direction of the rotating shaft 10. The plurality of bluff bodies 211 in the bluff body group 21 are respectively connected to the connecting member 22 and cooperate with the connecting member 22 to form a blade 20.

[0091] Specifically, the connection between the bluff body group 21 and the connecting member 22 can form the blade 20. That is to say, the stirring paddle 100 can include at least one blade 20. The blade 20 can mainly be composed of the connecting member 22 and the bluff body group 21. The bluff body group 21 can include at least two bluff bodies 211. The bluff bodies 211 in the bluff body group 21 can be indirectly connected to the rotating shaft 10 through the connecting member 22.

[0092] The connecting member 22 can extend in the radial direction of the rotating shaft 10 to facilitate carrying and connecting a plurality of blunt bodies 211 arranged at intervals in the radial direction of the rotating shaft 10.

[0093] In this embodiment, the connecting member 22 is provided as a connecting and carrying structure to fix the blunt body 211 and the rotating shaft 10 together, which is beneficial to improving the strength of the stirring paddle 100. At the same time, it is convenient to arrange a plurality of blunt bodies 211 in the radial direction of the rotating shaft 10, thereby enhancing the disturbance during stirring, improving the dispersion efficiency, and further reducing the stirring energy consumption.

[0094] In some specific embodiments of the present utility model, the connecting member 22 includes a first beam 221, a second beam 222, and a third beam 223.

[0095] The first beam 221 and the second beam 222 are arranged at intervals along the axial direction of the rotating shaft 10. The first beam 221 and the second beam 222 respectively extend in the radial direction of the rotating shaft 10 and are connected to the rotating shaft 10. The first beam 221 is connected to one end of the blunt body 211, and the second beam 222 is connected to the other end of the blunt body 211. The third beam 223 extends along the axial direction of the rotating shaft 10. One end of the third beam 223 is connected to the end of the first beam 221 away from the rotating shaft 10, and the other end of the third beam 223 is connected to the end of the second beam 222 away from the rotating shaft 10.

[0096] In other words, as Figure 1 and Figure 4 shown, the connecting member 22 of this embodiment can mainly be composed of three beams, and the three beams and the rotating shaft 10 can enclose a rectangular frame structure. Specifically, the three beams can be the first beam 221, the second beam 222, and the third beam 223 respectively.

[0097] In the axial direction of the rotating shaft 10, the first beam 221 and the second beam 222 are arranged at intervals. The first beam 221 is close to the driving member 200, and the second beam 222 is far from the driving member 200. The first beam 221 and the second beam 222 extend in the radial direction of the rotating shaft 10. One end of the first beam 221 and one end of the second beam 222 are respectively connected to the rotating shaft 10, and the other end of the first beam 221 and the other end of the second beam 222 are respectively connected to the third beam 223. The third beam 223 can extend in the axial direction of the rotating shaft 10.

[0098] One end of the blunt body 211 can be connected to the first beam 221, and the second end of the blunt body 211 can be connected to the second beam 222.

[0099] Optionally, the rotating shaft 10 can extend in the vertical direction. The first beam 221 and the second beam 222 can be cross beams, and the third beam 223 can be a vertical beam.

[0100] In this embodiment, the first beam 221, the second beam 222 and the third beam 223 can cooperate to form a fan shape, and both ends of the blunt body 211 are fixed by the first beam 221 and the second beam 222, which is beneficial to enhancing the strength of the fan blade.

[0101] In some alternative embodiments, the rotating shaft 10 may be provided with a mounting portion. The mounting portion may be strip-shaped and extend along the axial direction of the rotating shaft 10. The cross-section of the rotating shaft 10 is polygonal, and the number of sides of the polygon may be the same as the number of the paddle blades 20. Thus, a plurality of sequentially connected mounting surfaces 12 may be formed on the surface of the mounting portion, and each mounting surface 12 may be a flat surface, which is convenient for connecting the paddle blade 20 to the mounting surface 12.

[0102] According to some alternative embodiments of the present invention, the connecting member 22 includes a connecting beam 224. The connecting beam 224 extends in the radial direction of the rotating shaft 10, and the end or the middle part of the blunt body 211 is connected to the connecting beam 224.

[0103] One end of the connecting beam 224 may be connected to the rotating shaft 10, and the other end of the connecting beam 224 may extend in the radial direction of the rotating shaft 10 and form a free end. The connection between the blunt body 211 and the connecting beam 224 may be that the end of the blunt body 211 is connected to the connecting beam 224, or other positions of the blunt body 211 are connected to the connecting beam 224, which is not limited herein.

[0104] For example, as Figure 2 shown, the top end of the blunt body 211 may be connected to the connecting beam 224. As Figure 3 shown, the middle part of the blunt body 211 may be connected to the connecting beam 224.

[0105] According to other some embodiments of the present invention, the number of the paddle blades 20 is multiple. The multiple paddle blades 20 are beneficial to improving the mixing efficiency and enhancing the shearing force to achieve the effect of rapid and uniform mixing.

[0106] In some specific embodiments of the present invention, the multiple paddle blades 20 at least include a first paddle blade 20a and a second paddle blade 20b. In the direction from the inside to the outside of the rotating shaft 10, the diameters / equivalent diameters of the multiple blunt bodies 211 in the first paddle blade 20a gradually increase, and the diameters / equivalent diameters of the multiple blunt bodies 211 in the second paddle blade 20b gradually decrease.

[0107] For example, as Figure 4 shown in the direction, the paddle blade 20 on the lower left side of the stirring paddle 100 may be the first paddle blade 20a, and the paddle blade 20 on the lower right side of the rotating shaft 10 may be the second paddle blade 20b.

[0108] In the first blade 20a, the innermost bluff body 211 has the smallest diameter, the outermost bluff body 211 has the largest diameter, and the middle bluff body 211 has a medium diameter. In the first blade 20a, the innermost bluff body 211 has the largest diameter, the outermost bluff body 211 has the smallest diameter, and the middle bluff body 211 has a medium diameter.

[0109] Therefore, during the rotation of the stirring paddle 100, the eddy current generated by the outermost bluff body 211 of the first blade 20a is larger, and the eddy current generated by the outermost bluff body 211 of the second blade 20b is smaller, and the same is true for the innermost bluff body 211. The eddy currents of different sizes interfere with each other in the circumferential direction of the rotating shaft 10, which is conducive to enhancing the disturbance of the slurry and improving the dispersion efficiency.

[0110] According to some optional embodiments of the present invention, the plurality of blades 20 are evenly spaced and arranged along the circumference of the rotating shaft 10 .

[0111] According to some other embodiments of the present invention, a plurality of blades 20 overlap in the axial direction of the rotating shaft 10 .

[0112] Specifically, in the axial direction of the rotating shaft 10, the plurality of blades 20 may partially overlap or completely overlap, so that the truncated cones or cylinders formed by the rotation of the bluff bodies 211 in the plurality of blades 20 overlap in space. In other words, there is at least one plane perpendicular to the axial direction of the rotating shaft 10 that can simultaneously section the plurality of bluff bodies 211 with different diameters / equivalent diameters.

[0113] like Figure 5 As shown, the blades 20 are projected onto the outer peripheral surface of the rotating shaft 10 along the radial direction of the rotating shaft 10 to form a projection 23. The outer peripheral surface of the rotating shaft 10 can form an unfolded surface 13 after being unfolded. The axial direction of the rotating shaft 10 can be the length direction of the unfolded surface 13, and the circumferential direction of the rotating shaft 10 can be the width direction of the unfolded surface 13. On the unfolded surface 13, the projections 23 of the plurality of blades 20 can be spaced apart along the width direction of the unfolded surface 13, and the projections 23 of the plurality of blades 20 can at least partially overlap in the length direction of the unfolded surface 13. For example, a part or all of any two blades 20 can be directly opposite in the width direction of the unfolded surface 13.

[0114] Therefore, during the rotation of the agitator 100, part of the slurry can be disturbed by the blunt body 211 in multiple blades 20 in the circumferential direction of the rotating shaft 10, so that the vortex generated by the blunt body 211 disturbance in the previous blade 20 can interfere with the vortex generated by the blunt body 211 disturbance in the next blade 20, increasing the chaos of the slurry flow, thereby improving the dispersion efficiency.

[0115] The embodiment of the utility model further provides a homogenization device, which comprises a stirring paddle 100 according to any of the above embodiments.

[0116] Slurry mixing refers to the process of uniformly mixing lithium battery active material, conductive agent, binder, other additives and solvents, etc. Slurry mixing is the first process in the lithium battery manufacturing production line. The quality of the slurry mixing directly determines the quality of the lithium battery performance. Therefore, the slurry mixing equipment is one of the most critical equipment in the lithium battery manufacturing equipment.

[0117] Since the stirring paddle 100 according to the embodiment of the present invention has the above technical effects, therefore, the slurry mixing equipment according to the embodiment of the present invention also has corresponding technical effects, that is, different shear forces can be realized by using blunt bodies 211 with different diameters during the stirring process to generate eddies of different sizes. The interaction and common action of eddies of various sizes can intensify the disturbance of the slurry, so that the raw materials are quickly and uniformly mixed, which is beneficial to improving the dispersion efficiency, thereby reducing the time required for stirring and reducing the energy consumption required for stirring.

[0118] Embodiment 1

[0119] As Figure 1 shown, the stirring paddle 100 includes a rotating shaft 10 and four paddle blades 20. Each paddle blade 20 includes a first beam 221, a second beam 222, a third beam 223 and a blunt body group 21. Each blunt body group 21 includes three blunt bodies 211. Each blunt body 211 can be cylindrical, and the axis of each blunt body 211 is parallel to the axis 11 of the rotating shaft 10. Each blunt body 211 is connected between the first beam 221 and the second beam 222. The first beam 221, the second beam 222 and the third beam 223 and the rotating shaft 10 enclose a rectangular frame structure. The diameters of the three blunt bodies 211 in the blunt body group 21 gradually decrease from inside to outside.

[0120] Embodiment 2

[0121] As Figure 2 shown, the stirring paddle 100 includes a rotating shaft 10 and four paddle blades 20. Each paddle blade 20 includes a connecting beam 224 and a blunt body group 21. Each blunt body group 21 includes three blunt bodies 211. Each blunt body 211 can be cylindrical, and the axis of each blunt body 211 is parallel to the axis 11 of the rotating shaft 10. The top of each blunt body 211 is connected to the lower surface of the corresponding connecting beam 224. The diameters of the three blunt bodies 211 in the blunt body group 21 gradually decrease from inside to outside.

[0122] Embodiment 3

[0123] As Figure 3As shown, the stirring paddle 100 includes a rotating shaft 10 and four paddle blades 20. Each paddle blade 20 includes a connecting beam 224 and a blunt body group 21. Each blunt body group 21 includes three blunt bodies 211. Each blunt body 211 can be cylindrical, and the axis of each blunt body 211 is parallel to the axis 11 of the rotating shaft 10. The middle of each blunt body 211 is connected to the corresponding connecting beam 224. The diameters of the three blunt bodies 211 in the blunt body group 21 gradually decrease from inside to outside.

[0124] Example 4

[0125] As Figure 4 shown, the stirring paddle 100 includes a rotating shaft 10 and four paddle blades 20. Each paddle blade 20 includes a first beam 221, a second beam 222, a third beam 223 and a blunt body group 21. Each blunt body group 21 includes three blunt bodies 211. Each blunt body 211 can be cylindrical, and the axis of each blunt body 211 is parallel to the axis 11 of the rotating shaft 10. Each blunt body 211 is connected between the first beam 221 and the second beam 222. The first beam 221, the second beam 222 and the third beam 223 and the rotating shaft 10 enclose a rectangular frame structure. In the paddle blade 20 at the lower left corner, the diameters of the three blunt bodies 211 gradually increase from inside to outside. In the remaining paddle blades 20, the diameters of the three blunt bodies 211 gradually decrease from inside to outside.

[0126] Example 5

[0127] The stirring paddle 100 includes a rotating shaft 10 and four paddle blades 20. Each paddle blade 20 includes a first beam 221, a second beam 222, a third beam 223 and a blunt body group 21. Each blunt body group 21 includes four blunt bodies 211. Each blunt body 211 can be cylindrical, and the axis of each blunt body 211 is parallel to the axis 11 of the rotating shaft 10. Each blunt body 211 is connected between the first beam 221 and the second beam 222. The first beam 221, the second beam 222 and the third beam 223 and the rotating shaft 10 enclose a rectangular frame structure. The diameters of the four blunt bodies 211 in the blunt body group 21 gradually decrease from inside to outside.

[0128] Next, the process of the stirring paddle 100 of Example 5 of the present utility model and the traditional stirring paddle 100 for stirring the slurry will be compared.

[0129] Select the negative electrode formula of the lithium battery. The formula parameters are shown in Table 1 below. Use the homogenizing equipment equipped with the traditional stirring paddle and the stirring paddle 100 of Example 5 of the present utility model to prepare 50 L of the slurry under this negative electrode formula respectively, and collect the pulping time and energy consumption of the traditional stirring paddle and the stirring paddle 100 of Example 5 of the present utility model on the premise of ensuring the slurry quality (similar quality). In this example, the slurry quality refers to the characterization of the slurry such as viscosity, particle size, rheology, etc.

[0130] Table 1 Negative electrode formula parameters

[0131]

[0132] The traditional stirring paddle has a disk dispersion structure, and the diameter of the dispersion disk is 155 mm. In the stirring paddle 100 of Embodiment 5, the overall diameter of the stirring paddle 100 is 542 mm. In the order from the outside to the inside, the diameters of the four blunt bodies 211 in each blunt body group 21 are 12 mm, 18 mm, 25 mm, and 30 mm, and the distances between the four blunt bodies 211 in each blunt body group 21 and the rotating shaft 10 are 265 mm, 235 mm, 205 mm, and 175 mm respectively. Each blunt body 211 is vertically distributed.

[0133] The stirring processes used for the traditional stirring paddle and the stirring paddle of Embodiment 5 of the present utility model are shown in Table 2.

[0134] Table 2 Comparison of Stirring Processes

[0135]

[0136] As can be seen from Table 2, the pulping time of the homogenizing equipment equipped with the traditional stirring paddle is 140 minutes, and the pulping time of the homogenizing equipment equipped with the stirring paddle 100 of Embodiment 5 of the present utility model is 58 minutes. The stirring paddle 100 of the present utility model can make the pulping time only 42% of that of the traditional stirring paddle, and the improvement amplitude is obvious.

[0137] In addition, the power consumption required to prepare 50 L of slurry by the homogenizing equipment equipped with the two types of stirring paddles is collected respectively, and the specific results are shown in Table 3.

[0138] Table 3 Pulping Energy Consumption of Two Types of Stirring Paddles

[0139] Group Power consumption kWh <![CDATA[Cooling water consumption m 3 > Traditional stirring paddle 43.6 0.35 Stirring paddle of Example 5 8.9 0

[0140] As can be seen from Table 3, the power consumption of the homogenizing equipment equipped with the stirring paddle 100 of the present utility model is only 20% of that of the traditional stirring paddle, and the zero consumption of cooling water further saves energy consumption.

[0141] In addition, as can be seen from Table 2, the rotation speed of the stirring paddle of the homogenizing equipment equipped with the stirring paddle 100 of the present utility model is significantly lower than that of the traditional stirring paddle during pulping. Therefore, the reduction of energy consumption is an expected result. At the same time, the lower rotation speed of the stirring paddle will also reduce the temperature rise of the slurry during the pulping process, thereby saving the consumption of cooling water.

[0142] As can be seen from the above experimental results, the stirring paddle 100 of the present utility model can significantly improve the pulping efficiency and also significantly reduce the energy consumption during the pulping process.

[0143] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present utility model. The scope of the present utility model is defined by the appended claims.

Claims

1. A stirring paddle, characterized in that: include: A rotating shaft, the rotating shaft being rotatable around its own axis; A plurality of bluff bodies are respectively connected to the rotating shaft, the plurality of bluff bodies respectively extend linearly and in the same extending direction, the extending direction of each bluff body is parallel to the axial direction of the rotating shaft, and at least two of the bluff bodies have different diameters / equivalent diameters.

2. The stirring paddle according to claim 1, characterized in that: The plurality of bluff bodies are spaced apart in the radial direction and / or the circumferential direction of the rotating shaft.

3. The stirring paddle according to claim 1, characterized in that: The diameter / equivalent diameter of each bluff body at each location along its own extension direction is the same.

4. The stirring paddle according to claim 1, characterized in that: The diameter / equivalent diameter D of the bluff body is 5 mm to 500 mm.

5. The stirring paddle according to claim 1, characterized in that: The cross section of the bluff body is circular, elliptical, triangular, quadrilateral, polygonal or irregular.

6. The stirring blade according to any one of claims 1 to 5, characterized in that: At least two of the bluff bodies are spaced apart in the radial direction of the rotating shaft and constitute a bluff body group, and the diameters / equivalent diameters of the bluff bodies in the bluff body group are different.

7. The stirring paddle according to claim 6, characterized in that: In the direction from the inside to the outside of the rotating shaft, the diameters / equivalent diameters of the plurality of bluff bodies in the bluff body group gradually increase or decrease.

8. The stirring paddle according to claim 6, characterized in that: In the bluff body group, the distances between two adjacent bluff bodies are the same or different.

9. The stirring paddle according to claim 6, characterized in that: In the bluff body group, the diameter / equivalent diameter of the bluff body with the largest diameter among the plurality of bluff bodies is Dmax, and the distance between two adjacent bluff bodies is d, where d=Dmax~10*Dmax.

10. The stirring blade according to claim 6, characterized in that: Also includes: A connecting member extends in the radial direction of the rotating shaft, and a plurality of the bluff bodies in the bluff body group are respectively connected to the connecting member and cooperate with the connecting member to form a blade.

11. The stirring blade according to claim 10, characterized in that: The connecting piece comprises: a first beam and a second beam, the first beam and the second beam are arranged spaced apart along the axial direction of the rotating shaft, the first beam and the second beam respectively extend along the radial direction of the rotating shaft and are connected to the rotating shaft, the first beam is connected to one end of the bluff body, and the second beam is connected to the other end of the bluff body; A third beam extends along the axial direction of the rotating shaft, one end of the third beam is connected to an end of the first beam away from the rotating shaft, and the other end of the third beam is connected to an end of the second beam away from the rotating shaft.

12. The stirring blade according to claim 10, characterized in that: The connecting piece comprises: A connecting beam extends in the radial direction of the rotating shaft, and an end portion or a middle portion of the bluff body is connected to the connecting beam.

13. The stirring blade according to claim 10, characterized in that: The number of the blades is multiple.

14. The stirring blade according to claim 13, characterized in that: The plurality of blades include at least a first blade and a second blade. In the direction from the inside to the outside of the rotating shaft, the diameter / equivalent diameter of the plurality of bluff bodies in the first blade gradually increases, and the diameter / equivalent diameter of the plurality of bluff bodies in the second blade gradually decreases.

15. The stirring blade according to claim 12, characterized in that: The plurality of blades are evenly spaced and arranged along the circumference of the rotating shaft.

16. The stirring blade according to claim 12, characterized in that: The plurality of blades overlap in the axial direction of the rotating shaft.

17. A homogenization device, characterized in that: include: The stirring blade according to any one of claims 1 to 16.

Images