Stirring paddle for strengthening fluid mixing

Abstract

The invention provides a stirring paddle for strengthening fluid mixing, and relates to the field of fluid mixing devices, the stirring paddle comprises a fixing sleeve, a disc and a notched paddle, the main body structure of the notched paddle is characterized in that an initial square is divided into n2 small squares, notching is carried out in the initial square along the sides of the small squares at 1 / n positions of the sides of the initial square, cutting four edges of the initial square to obtain a main body structure of the primary fractal arrangement type cut blade; iteration is continued according to the rule, the main body structure of the notched blade subjected to multiple iterations can be obtained, and the main body structure of the notched blade is obtained by at least conducting one-time iteration on the initial structure. In the rotating process of the notch blades, fluid is sheared through the notch edges of the blades, the shearing force of the blades on the fluid is enhanced, high-speed jet flow is generated, the trailing vortex structure of the blades is damaged, the fluid speed is increased, the fluid turbulence strength is enhanced, the dispersion process of energy is enhanced, the mixing transmission efficiency of the fluid is improved, and the fluid mixing effect is improved.

Description

Technical Field

[0001] The present application relates to the field of fluid mixing devices, and in particular to a stirring paddle for enhancing fluid mixing. Background Art

[0002] The stirring device is the core equipment for fluid mixing in the production process of chemical industry, medicine, metallurgy, wastewater treatment, biological fermentation, food processing, etc. As the key component of the stirring device, the stirring paddle provides the required energy for the fluid mixing and mass transfer process, directly affecting the degree of material mixing, transfer and reaction. Its mixing performance is closely related to energy conservation and emission reduction in the process.

[0003] In fact, during the stirring process, traditional straight-blade impellers are prone to form large tail vortices behind and on the outer edge of the impeller blades. Most of the energy of the impeller is consumed in the tail vortex and used to maintain the circular motion of the fluid. Less energy is actually used for fluid mixing and mass transfer. The uniformity of the turbulence intensity of the flow field is poor. The axial and radial velocities of the fluid particles are both zero, and the motion trajectory undergoes regular, monotonous linear stretching. The mixing and transfer process of the fluid is insufficient. The fluid in the stirring device can only form a localized chaotic mixing zone near the impeller. There are isolation zones and "dead zones" in the flow field, and the mixing and transfer efficiency of the fluid is low.

[0004] In the prior art, in order to solve the above problems, the blade structure of the stirring paddle can be designed as a structure with fractal characteristics. For example, the stirring paddle is designed as a hollow structure based on the iteration of equilateral triangles, or as a concave-convex sheet structure based on the self-similarity of squares, or as a sheet structure based on Z-shaped superposition. However, the stirring paddles of these structures still have certain problems in the fluid mixing process. For example, only the reduction of the size of the blade tail vortex is considered. Although the uniformity of the flow field turbulence intensity is improved, the physical cross-sectional area of ​​the blade is small, the porosity at the center of the blade is too large, the interaction between the blade and the fluid is small, the flow field turbulence intensity and the fluid velocity are low, and the connection between similar "units" is relatively weak, ignoring the structural strength of the blade, which hinders the practical application of the stirring paddle. Summary of the invention

[0005] The embodiment of the present application provides a stirring paddle for strengthening fluid mixing. During the rotation process, the notched blade can shear the fluid through the notched edge of the blade, enhance the shear force of the blade on the fluid, generate a high-speed jet, destroy the blade tail vortex structure, increase the fluid velocity, enhance the fluid turbulence intensity, enhance the energy dispersion process, improve the mixing and transfer efficiency of the fluid, and improve the effect of fluid mixing. The present application solves the problems that a large tail vortex structure is easily formed behind the blade of a traditional stirring paddle during fluid mixing, the uniformity of the turbulence intensity of the flow field is poor, the axial and radial velocities of the fluid particles are both zero, there are isolation areas and "dead areas" in the flow field, and the mixing effect of the fluid is poor. At the same time, the center position of the main structure of the notched blade is not provided with a notch, or only a small number of notches are provided. The center position of the main structure of the notched blade is a complete sheet structure, which can enhance the interaction between the blade and the fluid, improve the turbulence intensity of the flow field and the fluid flow rate, and can also solve the problems that similar stirring paddles have with the increase of the number of iterations, the blade structure strength decreases, and the use scene is limited.

[0006] The embodiment of the present application provides a stirring impeller for enhancing fluid mixing, comprising a fixed sleeve, a disc and a notched impeller;

[0007] The disc is sleeved on the fixed sleeve, and a plurality of the cut blades are evenly arranged on the disc, and the cut blades are sheet-like structures with fractal-arranged cuts;

[0008] The main structure of the notched blade is to divide an initial square into n 2 (n≥3, n is the number of small squares in each column or row) small squares are cut into the initial square along the edge of the small square at 1 / n of the edge of the initial square, and the four edges of the initial square are cut to obtain the main structure of the primary fractal arrangement type cut blade;

[0009] Iterations are continued according to the above rule to obtain the main structure of the notched blade after multiple iterations, wherein the main structure of the notched blade is obtained by at least one iteration of the initial structure.

[0010] In a feasible implementation, the length of the incision is 1 / n of the side length of the initial square, and the width of the incision is 1 / 3 to 3 times the thickness of the initial square.

[0011] In a feasible implementation, the side length of the initial square of the notch blade structure remains unchanged during the notch iteration process.

[0012] In a feasible implementation, in the current iteration, when the number of small squares divided in each iteration is the same, the side length of the small square is 1 / n of the side length of the initial square. m, where n is the number of small squares divided into each column or row in each iteration, and m is the number of iterations.

[0013] In a feasible implementation, during the iterative cutting process of the cutting blade structure, the cutting can be performed only where there are square solid edges.

[0014] In a feasible implementation, during the incision iteration process of the incision blade structure, the distances from the two inner side walls of the incision to the center lines of two adjacent small squares are equal.

[0015] In a feasible implementation, the shear perimeter of the notched blade structure increases as the number of notch iterations increases.

[0016] In a feasible implementation, the area of ​​the notched paddle structure decreases as the number of notched iterations increases.

[0017] In a feasible implementation, the cut-out blade is provided with a first slot, and the disc is plugged into the first slot;

[0018] The edge of the disk extends to a position of 1 / 4 to 1 / 2 of the transverse length of the notched blade.

[0019] In a feasible implementation, the disk is provided with a second slot, and a plurality of the second slots are evenly distributed on the disk;

[0020] One side of the cut-out blade is plugged into the second slot.

[0021] The embodiment of the present application provides a stirring impeller for enhancing fluid mixing, wherein the main structure of the notched impeller is to divide an initial square into n 2 A small square is formed, and an incision is made into the initial square along the edge of the small square at 1 / n of the edge of the initial square, and the four edges of the initial square are all incisively cut to obtain a main structure of the incision blade in a fractal arrangement; the incision blade main structure is obtained by iterating the initial structure at least once according to the above rule;

[0022] During the rotation process, the notched blade can shear the fluid through the notch edge of the blade, enhance the shear force of the blade on the fluid, generate a high-speed jet, destroy the blade tail vortex structure, increase the fluid velocity, enhance the fluid turbulence intensity, strengthen the energy dispersion process, improve the mixing and transfer efficiency of the fluid, and improve the effect of fluid mixing. At the same time, there is no notch at the center of the main structure of the notched blade, or only a small number of notches are set. The center of the main structure of the notched blade is a complete sheet structure, which can enhance the interaction between the blade and the fluid, increase the turbulence intensity of the flow field and the fluid flow rate, and improve the transfer and mixing efficiency of the fluid while ensuring the stability of the strength of the main structure of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the stirring paddle for enhancing fluid mixing provided by the present application;

[0024] Figure 2 It is a schematic diagram of a stirring device of a stirring paddle for enhancing fluid mixing provided by the present invention;

[0025] Figure 3 This is a schematic diagram of a fractal arrangement type notched blade structure;

[0026] Figure 4 It is a schematic diagram of the structure of the quadratic fractal arrangement notched blade;

[0027] Figure 5 It is a schematic diagram of the cubic fractal arrangement type incision blade structure;

[0028] Figure 6 This is a data sheet of a fractal arrangement of cut-out stirring paddles used in an acid-base decolorization comparison experiment;

[0029] Figure 7 This is a data sheet of the use of a secondary fractal arrangement notched stirring paddle for acid-base decolorization comparison experiments;

[0030] Figure 8 This is a data sheet of the use of a three-dimensional fractal-arranged notched stirring paddle for acid-base decolorization comparison experiments.

[0031] Description of reference numerals:

[0032] 1-motor; 2-stirring shaft; 3-stirring tank; 4-baffle; 5-notched blade; 6-disc; 7-fixing sleeve. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0034] The stirring paddle is a key component in the stirring device and is used to mix and stir materials such as liquids, solids or gases.

[0035] When the impeller rotates, the fluid pressure difference behind and at the outer edge of the blade is large, the pressure is low near the back and outer edge of the blade, and the pressure is high away from the blade. This pressure difference easily leads to the formation of the blade tail vortex. The tail vortex consumes energy and directly affects the stirring effect and fluid mixing efficiency. The impeller for strengthening fluid mixing provided by the present application is provided with a plurality of notched blades. During the rotation process, the impeller can shear the fluid through the notch edge of the blade, enhance the shear force of the blade on the fluid, generate a high-speed jet, destroy the blade tail vortex structure, increase the fluid velocity, enhance the fluid turbulence intensity, enhance the energy dispersion process, improve the mixing and transfer efficiency of the fluid, and improve the effect of fluid mixing. At the same time, the center position of the notched blade main structure is not provided with an incision, or only a small number of incisions are provided. The center position of the notched blade main structure is a complete sheet structure, which can enhance the interaction between the blade and the fluid, enhance the turbulence intensity of the flow field, increase the flow rate of the fluid, and improve the transfer and mixing efficiency of the fluid under the premise of ensuring the stability of the strength of the blade main structure.

[0036] The specific structure of the stirring paddle for enhancing fluid mixing provided by the present application is described in detail below in conjunction with the accompanying drawings.

[0037] Reference Figure 1-Figure 8 As shown, the embodiment of the present application provides a stirring impeller for enhancing fluid mixing, comprising a fixed sleeve, a disc 6 and a plurality of notched impeller blades 5;

[0038] The fixing sleeve 7 is a ring structure with a certain strength, which cooperates with the output shaft of the power device. The disc 6 is a prototype disc structure and can be made of stainless steel. The disc 6 is sleeved on the fixing sleeve 7, and a plurality of the cut blades 5 are evenly arranged on the disc 6. Figure 1 As shown, the six notched blades 5 are evenly arranged on the disk 6 with the center of the disk 6 as the center, wherein:

[0039] The notched blade 5 is a sheet-like structure with fractal-arranged notches and has self-similar characteristics;

[0040] The cutting blade 5 is used to divide an initial square into n equal parts.2 (n≥3, n is the number of small squares in each column or row) small squares are cut into the initial square along the edge of the small square at 1 / n of the edge of the initial square, and the four edges of the initial square are cut to obtain the main structure of the primary fractal arrangement type cut blade;

[0041] According to the above rules, the small squares in a fractal iteration structure are further divided into n 2 (n≥3) small squares are cut continuously at 1 / n of the places where the small squares have real edges in the first fractal iteration structure, and the main structure of the second-arranged cut blade is obtained;

[0042] According to the above rules, the small squares in the quadratic fractal iteration structure are further divided into n 2 (n≥3) small squares are cut continuously at 1 / n of the places where the small squares have real edges in the quadratic fractal iteration structure, and the main structure of the cubically arranged cut blade is obtained;

[0043] According to the above rules, by continuing to cut the blade structure, a cut blade 5 with more fractal iterations can be obtained;

[0044] The main structure of the notched blade 5 is obtained by at least one iteration of the initial structure.

[0045] The cutouts are mainly distributed on the edge of the cutout blade 5 body, so as to shear the fluid during stirring, enhance the shear force of the blade on the fluid, generate high-speed jets, destroy the blade tail vortex structure, increase the turbulence intensity of the fluid, strengthen the energy dispersion process, improve the mixing and transfer efficiency of the fluid, shorten the mixing time of the fluid, and improve the mixing efficiency of the fluid. No cutout is set at the center of the cutout blade 5, or only a small number of cutouts are set. The disk 6 is connected to the position of 1 / 4 to 1 / 2 of the horizontal length of the cutout blade 5 to ensure the strength of the stirring paddle.

[0046] In some embodiments, a first slot is provided on the side of the notched blade close to the disc 6, and the first slot extends transversely to a position of 1 / 4 to 1 / 2 of the transverse length of the notched blade. In the height direction, the first slot can be provided in the middle of the notched blade;

[0047] The disc is inserted into the first slot and can be fixed by welding, and the edge of the disc extends to a position of 1 / 4 to 1 / 2 of the transverse length of the cut blade, thereby ensuring the strength of the stirring paddle.

[0048] In some embodiments, a second slot is provided on the disk. When six cut blades are provided, six second slots are evenly provided on the outer side of the disk. The outer ends of the second slots are located at the outer edge of the disk, and the inner ends of the second slots extend toward the center of the disk. The extension length of the second slots is approximately 1 / 4 to 1 / 2 of the transverse length of the cut blades.

[0049] The notched blade is inserted into the second slot and can be fixed by welding. The plane where the notched blade is located can be perpendicular to the plane where the disc is located.

[0050] In some embodiments, the length of the cut is 1 / n (n≥3, n is the number of small squares in each column or row) of the side length of the initial square, and the width of the cut is 1 / 3 to 3 times the thickness of the initial square;

[0051] When the initial square is divided into 9 small squares of 3×3, the length of the cut is 1 / 3 of the side length of the initial square, and the width of the cut is positively correlated with the thickness of the initial square.

[0052] In some embodiments, the side length of the initial square of the cutting blade 5 structure remains unchanged during the cutting iteration process;

[0053] As the number of iterations increases, the number of cuts gradually increases, and the number of gaps on the outer edge of the initial square increases, but it does not affect the side length of the initial square.

[0054] In some embodiments, in the current iteration, when the number of small squares divided in each iteration is the same, the side length of the small square is 1 / n of the side length of the initial square. m , where n is the number of small squares divided into each column or row in each iteration, and m is the number of iterations;

[0055] When the number of small squares divided in each iteration is 9, that is, the number of small squares divided in each column or row is 3, and the iteration is repeated 2 times, the side length of the small square is 1 / 9 of the side length of the initial square;

[0056] In the current iteration, when the number of small squares divided in each iteration is different, the side length of the small square is 1 / n1·n2…n of the side length of the initial square m , where n is the number of small squares divided into each column or row in each iteration, and m is the number of iterations;

[0057] When two iterations are performed, that is, m=2, the number of small squares divided in the first iteration is 9, that is, the number of small squares divided in each column or row is 3, n1=3, and the number of small squares divided in the second iteration is 16, that is, the number of small squares divided in each column or row is 4, n2=4, then, the side length of the small square is 1 / 3×4 of the side length of the initial square, and the side length of the small square is 1 / 12 of the side length of the initial square.

[0058] In some embodiments, during the iterative cutting process of the cutting blade structure, the cutting can only be performed where there are square solid edges;

[0059] The cutout is set at a location where there is a solid edge of the square, that is, the cutout is set between two adjacent small squares.

[0060] In some embodiments, during the incision iteration process of the incision blade structure, the distances from the two inner side walls of the incision to the center lines of two adjacent small squares are equal;

[0061] The incision has a certain width and is located in the middle of two adjacent small squares. The areas cut from the two adjacent small squares are the same, that is, the distances from the two inner side walls of the incision to the center lines of the two adjacent small squares are equal.

[0062] In some embodiments, the shear perimeter of the notched paddle structure increases as the number of notching iterations increases;

[0063] As the number of iterations increases, the number of cuts gradually increases, and the shear perimeter of the cuts gradually increases.

[0064] In some embodiments, the area of ​​the notched paddle structure decreases as the number of notching iterations increases;

[0065] As the number of iterations increases, the number of cuts gradually increases, and the area of ​​the initial square cut increases, causing the area of ​​the initial square to gradually decrease, that is, the area of ​​the cut blade structure gradually decreases.

[0066] For example, taking a fractal arrangement cut blade as an example, Figure 3 As shown, the side length of the initial square is L = 5.4 cm, and it is divided into nine equal parts. In the first fractal iteration, the side length L1 of the small square is 1 / 3 of L. The blade is cut at 1 / 3 of the side of the initial square. The length of the cut is 1 / 3 of the side length of the initial square, and the width is 1 / 2 of the thickness of the blade. The distance between the two sides of the cut on the real side of the small square and the side of the small square is 0.0005m.

[0067] Experiment 1: Using the fractal arrangement of the incision stirring paddle in the above example, and refer to Figure 2 and Figure 3, the stirring shaft 2 is driven by the motor 1, and a fractal arrangement type incision stirring paddle is installed on the stirring shaft 2, and the fluid is mixed and stirred in the stirring tank 3. The stirring tank 3 has a groove diameter of 0.48m, a groove height of 1m, a baffle 4 width of 0.048m, a liquid height of 0.5m, and a 2% xanthan gum solution. Acid-base decolorization experiments are carried out under the same power consumption conditions.

[0068] The experimental results are shown in Figure 6 ,from Figure 6 It can be seen from the results of the acid-base decolorization experiments that under the conditions of stirring power consumption of 17.5 W, 27.0 W and 42.0 W respectively, the mixing time of the mixing system of the single fractal arrangement notched stirring paddle disclosed in the present invention is shortened by 37.93%, 10.91% and 12.90% respectively compared with the conventional straight-blade stirring paddle.

[0069] Take the quadratic fractal arrangement cut blade as an example. Figure 4 As shown, the side length of the initial square is L=5.4cm, and the nine small squares in the first fractal iteration are further divided into nine equal parts. The side length L2 of the small square in the second fractal iteration is 1 / 3 of L1. An incision is made at 1 / 3 of the place where the small square has a real edge in the first fractal iteration structure. The length of the incision is 1 / 3 of the side length of the small square in the first fractal iteration structure, and the width is 1 / 2 of the thickness of the blade. The distance between both sides of the incision on the small square side and the small square side is 0.0005m.

[0070] Experiment 2: Using the quadratic fractal arrangement of the incision stirring paddle in the above example, and refer to Figure 2 and Figure 4 , the stirring shaft 2 is driven by the motor 1, and a secondary fractal arrangement type incision stirring paddle is installed on the stirring shaft 2, and the fluid is mixed and stirred in the stirring tank 3. The stirring tank 3 has a groove diameter of 0.48m, a groove height of 1m, a baffle 4 width of 0.048m, a liquid height of 0.5m, and a 2% xanthan gum solution. Acid-base decolorization experiments are carried out under the same power consumption conditions.

[0071] The experimental results are shown in Figure 7 ,from Figure 7 It can be seen from the results of the acid-base decolorization experiments that under the conditions of stirring power consumption of 17.5 W, 27.0 W and 42.0 W respectively, the mixing time of the mixing system of the secondary fractal arrangement notched stirring paddle disclosed in the present invention is shortened by 44.83%, 23.64% and 22.58% respectively compared with the conventional straight-blade stirring paddle.

[0072] Take the cubic fractal arrangement cut blade as an example. Figure 5As shown, the side length of the initial square is L=5.4cm, and the nine small squares in the secondary fractal iteration are further divided into nine equal parts. In the third fractal iteration, the side length L3 of the small square is 1 / 3 of L2. An incision is made at 1 / 3 of the place where the small square has a real edge in the secondary fractal iteration structure. The length of the incision is 1 / 3 of the side length of the small square in the secondary fractal iteration structure, and the width is 1 / 2 of the thickness of the blade. The distance between the two sides of the incision on the small square side and the small square side is 0.0005m.

[0073] Experiment 3: Using the cubic fractal arrangement of the incision stirring paddle in the above example, and refer to Figure 2 and Figure 5 , the stirring shaft 2 is driven by the motor 1, and a three-fold fractal arrangement type incision stirring paddle is installed on the stirring shaft 2, and the fluid is mixed and stirred in the stirring tank 3. The stirring tank 3 has a groove diameter of 0.48m, a groove height of 1m, a baffle 4 width of 0.048m, a liquid height of 0.5m, and a 2% xanthan gum solution. The acid-base decolorization experiment is carried out under the same power consumption conditions.

[0074] The experimental results are shown in Figure 8 ,from Figure 8 It can be seen from the results of the acid-base decolorization experiments that under the conditions of stirring power consumption of 17.5 W, 27.0 W and 42.0 W respectively, the mixing time of the mixing system is shortened by 48.28%, 29.10% and 32.26% respectively compared with the conventional straight-blade stirring paddle disclosed in the present invention.

[0075] It can be seen from the above technical solutions that compared with the prior art, the present application has the following technical effects: the present application sets a plurality of notched blades, and the main structure of the notched blades is to divide an initial square into n 2 A small square is formed, and an incision is made into the initial square along the edge of the small square at 1 / n of the edge of the initial square, and the four edges of the initial square are all incisively cut to obtain the main structure of the incision blade with a fractal arrangement; the main structure of the incision blade is obtained by iterating the initial structure at least once according to the above rule;

[0076] During the rotation process, the notched blade can shear the fluid through the notch edge of the blade, enhance the shear force of the blade on the fluid, generate a high-speed jet, destroy the blade tail vortex structure, increase the fluid velocity, enhance the fluid turbulence intensity, strengthen the energy dispersion process, improve the mixing and transfer efficiency of the fluid, and improve the effect of fluid mixing. At the same time, there is no notch at the center of the main structure of the notched blade, or only a small number of notches are set. The center of the main structure of the notched blade is a complete sheet structure, which can enhance the interaction between the blade and the fluid, enhance the turbulence intensity of the flow field, increase the flow rate of the fluid, and improve the transfer and mixing efficiency of the fluid while ensuring the stability of the strength of the main structure of the blade.

[0077] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0078] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A stirring paddle for enhancing fluid mixing, characterized in that: include; Fixed sleeve; A disc sleeved on the fixed sleeve; A notched blade is arranged on the disc, wherein the notched blade is a sheet-like structure with fractal-arranged notches; The main structure of the notched blade is to divide an initial square into n 2 (n≥3, n is the number of small squares in each column or row) small squares are cut into the initial square along the edge of the small square at 1 / n of the edge of the initial square, and the four edges of the initial square are cut to obtain the main structure of the primary fractal arrangement type cut blade; Iterations are continued according to the above rule to obtain the main structure of the notched blade after multiple iterations, wherein the main structure of the notched blade is obtained by at least one iteration of the initial structure.

2. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The length of the incision is 1 / n of the side length of the initial square, and the width of the incision is 1 / 3 to 3 times the thickness of the initial square.

3. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The side length of the initial square of the cutting blade structure is always kept unchanged during the cutting iteration process.

4. The stirring impeller for enhancing fluid mixing according to claim 3, characterized in that: In the current iteration, when the number of small squares divided in each iteration is the same, the side length of the small square is 1 / n of the side length of the initial square. m , where n is the number of small squares divided into each column or row in each iteration, and m is the number of iterations.

5. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: During the iterative cutting process of the cutting blade structure, the cutting can be performed only where there are square solid edges.

6. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: During the incision iteration process of the incision blade structure, the distances from the two inner side walls of the incision to the center lines of two adjacent small squares are equal.

7. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The shear perimeter of the notched blade structure increases as the number of notch iterations increases.

8. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The area of ​​the notched paddle structure decreases as the number of notched iterations increases.

9. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The cut-out blade is provided with a first slot, and the disc is plugged into the first slot; The edge of the disk extends to a position of 1 / 4 to 1 / 2 of the transverse length of the notched blade.

10. The stirring impeller for enhancing fluid mixing according to claim 1, characterized in that: The disk is provided with a second slot, and a plurality of the second slots are evenly distributed on the disk; One side of the cut-out blade is plugged into the second slot.

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