Paddle structure and mixer comprising same

Abstract

The invention discloses a paddle structure and a mixer comprising the paddle structure, the paddle structure is provided with a plurality of groups, the plurality of groups of paddle structures are alternately arranged on two relatively parallel shaft bodies, each paddle structure further comprises a main blade, the main blade is arranged along the axial direction of the shaft bodies in a hollowed-out manner, and the main blade is arranged on the shaft bodies in a hollowed-out manner. A plurality of edges are arranged in the main blade along the radial direction of the shaft body; the main blades are arranged on the shaft body in the axial direction of the shaft body, the kneading pieces are arranged on the main blades in the axial direction of the shaft body, the kneading pieces are located on the side portions of the main blades and located on the edges, away from the shaft body, of the main blades, and the side edges of the kneading pieces are flush with the edges of the main blades. The main blade is arranged in a hollowed-out manner, so that a plurality of edges are formed in the main blade in the radial direction of the shaft body, the edges synchronously rotate along with the main blade and can shear materials, the mixing effect and the uniformity degree of the materials are improved, and the device is suitable for melt blending of high polymer materials and blending, absorption or devolatilization of other high-solid and high-viscosity materials.

Description

Technical Field

[0001] The present invention relates to the technical field of mixers, and in particular to a blade structure and a mixer comprising the same. Background Art

[0002] Horizontal mixer is a common industrial equipment widely used in chemical, metallurgical and food fields, which is used to mix different materials evenly. However, there are many problems with the traditional blade structure. First, the blades of the traditional blade structure are flat blades and the blades between adjacent shafts are kneaded with each other. On this basis, the length of the shaft is certain, which limits the number of blades. The limited number of blades will make the shearing effect and deagglomeration strength of the materials in the mixer relatively low, which is difficult to meet the mixing requirements under special working conditions. This will result in an unsatisfactory mixing effect, making it difficult to achieve complete mixing of different materials, leading to the problem of uneven mixing. Secondly, the self-cleaning performance of the traditional blade structure is poor, which leads to waste of materials and increased production costs. Therefore, it is urgent to develop new blades to improve the performance of horizontal mixers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of poor mixing effect of the mixer in the prior art and provide a blade structure and a mixer comprising the same.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A blade structure, wherein the blade structure is provided in multiple groups, and the multiple groups of blade structures are alternately arranged on two relatively parallel shafts, and the blade structure further comprises:

[0006] A main blade, wherein the main blade is hollowed out along the axial direction of the shaft body, and has a plurality of edges along the radial direction of the shaft body;

[0007] A kneading piece is provided on the main blade along the axial direction of the shaft, the kneading piece is located on the side of the main blade, the kneading piece is located on the edge of the main blade away from the shaft, and the side of the kneading piece is flush with the edge of the main blade.

[0008] In this solution, the main blades are hollowed out to create multiple edges along the radial direction of the shaft. These edges rotate synchronously with the main blades and can shear the material. Compared to flat blades, which require an additional number of blades to shear the material, this method not only eliminates the need for additional blades, but also meets the shearing requirements, improving the mixing effect and uniformity of the materials. It is suitable for melt blending of polymer materials and other high-solids, high-viscosity materials for blending, absorption, or devolatilization. Furthermore, the hollowed-out main blades allow the material to flow through the hollowed-out areas, generating a certain degree of backflow during the stirring process, enhancing the back-mixing effect during the stirring process, increasing the material's residence time in the blade structure at that location, and achieving a more uniform mixing effect. This further enhances the shearing, stretching, and mixing capabilities of the blade structure by shearing through the edges. The kneading elements are located flush with the edges of the main blades, allowing the main blades to scrape away material accumulated in the cavity containing the two shafts, such as on the inner wall of the mixer, as they rotate, achieving self-cleaning. This reduces the possibility of continuous mixing failure caused by material accumulation.

[0009] Preferably, the blade structure further includes an auxiliary blade, which is arranged parallel to the main blade and connected to the main blade through the end of the kneading element away from the main blade, and the edge of the auxiliary blade is flush with the edge of the main blade.

[0010] In this solution, auxiliary blades are provided on the main blades to further increase the edges on the shaft for shearing the material, and the edges of the auxiliary blades are set flush with the edges of the main blades, so that the auxiliary blades can also stir the accumulated material when the kneading element scrapes and cleans the accumulated material, ensuring that the material can be continuously stirred and mixed throughout the mixing process, thereby achieving a more uniform mixing effect.

[0011] Preferably, both the main blade and the auxiliary blade are fan-shaped blades, wherein the size of the auxiliary blade is 10%-30% of the main blade.

[0012] In this solution, through the above-mentioned setting, the auxiliary blades can effectively shear and stretch the material while following the rotation of the main blades. At the same time, the size of the auxiliary blades along the axial direction of the shaft can block the material so that the material can easily flow to the hollow part of the main blades again, that is, multiple remixing.

[0013] Preferably, the thickness of the main blade is not less than 1 / 10 of the axial distance between two adjacent groups of the blade structures on the same shaft, and the thickness of the kneading element is less than or equal to the thickness of the main blade and greater than or equal to 3 / 5 of the thickness of the main blade.

[0014] In this solution, the above arrangement ensures that the shearing effect of the main blades on the material is ensured, and at the same time, the stirring effect of the kneading element on the material is correspondingly ensured.

[0015] Preferably, the blade structure further includes a connecting piece, which is located between two adjacent main blades in the same group of the blade structure. The kneading piece is provided on the connecting piece, and the auxiliary blade is connected to the connecting piece via the kneading piece.

[0016] In this solution, through the above-mentioned setting, the additional connecting piece is provided to shear the material, thereby further improving the mixing effect.

[0017] Preferably, the main blades are detachably connected to the shaft, each main blade extends in a spiral direction and the main blades of the same group of blade structures are located on the same circumference, and there is an inclination angle between the extension direction of the main blades and the plane where the radial direction of the shaft is located.

[0018] In this solution, by extending the main blades in a helical direction, the shaft can drive the material axially as it rotates. This means that the main blades' rotation shears and stretches the material, driving its movement. This allows for continuous processing without being affected by material accumulation. Furthermore, the axial movement of the material by the main blades differs from the axial movement of the shaft itself, eliminating the need for a structure to drive the shaft's movement. Furthermore, the material's state during continuous movement is more stable, unaffected by shaft oscillations.

[0019] Preferably, the inclination angle is in the range of 1-10°.

[0020] In this solution, through the above-mentioned setting, the inclination angle between the extension direction of the main blade and the plane where the radial direction of the shaft is located can be adjusted for different materials, which has a wider range of applications and can provide more efficient mixing efficiency for different materials.

[0021] Preferably, the sum of the angles of the plurality of main blades of each group of the blade structure is in the range of 180-270°.

[0022] In this solution, the above-mentioned arrangement ensures the mixing effect of each set of blade structures.

[0023] Preferably, the blade structures on the two shafts are alternately arranged and the number of the blade structures is the same, and the rotational speeds of the two shafts are the same.

[0024] In this solution, through the above arrangement, the paddle structure on each shaft can effectively knead and fully stir with the material when the two shafts rotate, and the mixing effect is better when the rotation speed is the same.

[0025] A mixer comprises the blade structure described above.

[0026] In this solution, the mixer includes the above-mentioned blade structure, so as to fully mix and deagglomerate the materials through the blade structure. Compared with other blade structures, the mixing effect is significantly improved.

[0027] The positive and progressive effects of the present invention lie in the following: by hollowing out the main blades, multiple edges are formed within the main blades along the radial direction of the shaft. These edges rotate synchronously with the main blades and can shear the material. Compared to flat blades, which require increasing the number of blades to shear the material by adding edges, this method not only eliminates the need for additional blades, but also meets the shearing requirements, improving the mixing effect and uniformity of the materials. It is suitable for melt blending of polymer materials and other high-solids, high-viscosity materials for blending, absorption, or devolatilization. Furthermore, the hollowed-out main blades allow the material to flow through the hollowed-out areas, generating a certain degree of backflow during the stirring process, enhancing the back-mixing effect during the stirring process, increasing the material's residence time in the blade structure at that location, and achieving a more uniform mixing effect. The edges further shear the material, enhancing the shearing, stretching, and mixing capabilities of the blade structure. The kneading elements are located flush with the edges of the main blades, allowing the main blades to scrape away material accumulated in the cavity containing the two shafts, such as on the inner wall of the mixer, during rotation, achieving self-cleaning. This reduces the possibility of continuous mixing failure caused by material accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of a blade structure according to a preferred embodiment of the present invention.

[0029] Figure 2 FIG. 1 is a top view of a blade structure according to a preferred embodiment of the present invention.

[0030] Figure 3 This is a three-dimensional diagram of a blade structure according to a preferred embodiment of the present invention.

[0031] Figure 4 This is a front view of a blade structure with eight blades according to a preferred embodiment of the present invention.

[0032] Figure 5 This is a top view of a blade structure with eight blades according to a preferred embodiment of the present invention.

[0033] Figure 6 This is a three-dimensional diagram of a blade structure with eight blades according to a preferred embodiment of the present invention.

[0034] Figure 7 It is a front view of a blade structure with a connecting piece according to a preferred embodiment of the present invention.

[0035] Figure 8 FIG1 is a top view of a blade structure with a connecting member according to a preferred embodiment of the present invention.

[0036] Figure 9 This is a three-dimensional diagram of a blade structure with a connecting piece according to a preferred embodiment of the present invention.

[0037] Figure 10 This is a comparison chart of the power coefficients of the blade structure of a preferred embodiment of the present invention and the traditional blade.

[0038] Figure 11 A comparison chart of flow rate data between the impeller structure of a preferred embodiment of the present invention and a traditional impeller.

[0039] Figure 12 This is a comparison chart of the pumping efficiency of the impeller structure of a preferred embodiment of the present invention and the traditional impeller.

[0040] Figure 13 This is a comparison chart of the average shear rate of the blade structure of a preferred embodiment of the present invention and the traditional blade.

[0041] Figure 14 This is a comparison chart of the depolymerization work performed on the material by the blade structure of a preferred embodiment of the present invention and the traditional blade at a rotation speed of 100 r / min.

[0042] Description of reference numerals:

[0043] Blade structure 1

[0044] Main blade 11

[0045] Edge 111

[0046] Kneading element 12

[0047] Auxiliary blade 13

[0048] Axis 2

[0049] Connector 3

[0050] Inclination angle α DETAILED DESCRIPTION

[0051] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0052] This embodiment provides a blade structure 1, the specific structure is as follows Figure 1 、 Figure 2 and Figure 3 As shown, multiple groups of blade structures 1 are provided, and the multiple groups of blade structures 1 are alternately provided on two relatively parallel shaft bodies 2. The multiple groups of blade structures 1 are spaced apart along the axial direction of the shaft body 2 and the multiple groups of blade structures 1 are evenly distributed along the radial direction of the shaft body 2. The blade structure 1 also includes:

[0053] The main blade 11 is hollowed out along the axial direction of the shaft body 2, and has a plurality of edges 111 along the radial direction of the shaft body 2;

[0054] The kneading piece 12 is arranged on the main blade 11 along the axial direction of the shaft body 2. The kneading piece 12 is located on the side of the main blade 11. The kneading piece 12 is located on the edge of the main blade 11 away from the shaft body 2. The side of the kneading piece 12 is flush with the edge of the main blade 11.

[0055] Specifically, the shaft body 2 is a cylindrical structure and can rotate by itself. The paddle structure 1 is arranged on the shaft body 2 and rotates accordingly when the shaft body 2 rotates, so as to mix and disperse the materials placed between the two shaft bodies 2 and achieve deagglomeration of the materials. The paddle structure 1 includes a main blade 11, which is a plate and multiple main blades 11 are arranged at intervals around the same circumference in the same group of paddle structures 1. The main blade 11 is hollowed out along the axial direction of the shaft body 2 and forms multiple edges 111 along the radial direction of the shaft body 2. The hollowing can be a fan-shaped hollow hole, a rectangular hollow hole or a hollow hole of other irregular shapes. Multiple edges 111 are additionally arranged in the extension direction of the main blade 11. From the appearance point of view, the edge 111 does not protrude from the surface of the main blade 11 and does not need to occupy the space on the outer peripheral side of the main blade 11. When the blade structure 1 rotates following the shaft 2, the main blade 11 is driven to rotate accordingly. When the material comes into contact with the main blade 11, it can not only be sheared and stretched by the edge of the main blade 11, but the material can also enter the hollow part and be further sheared and stretched by the edge 111, so as to achieve a good deagglomeration function and meet the needs of material mixing.

[0056] Compared with the traditional flat blades, which need to increase the number of blades to shear the material by adding edges 111, this method not only does not require an increase in the number of blades, but also can meet the shearing requirements, improve the mixing effect and uniformity of the material, and is suitable for the melt blending of polymer materials and the blending, absorption or devolatilization of other high-solid, high-viscosity materials.

[0057] On this basis, the hollowed-out main blade 11 can also allow the material to flow through the hollowed-out portion, and the material can generate a certain degree of backflow during the stirring process. Without the need to set up an additional guide structure, the back-mixing effect during the stirring process can be enhanced, and the residence time of the material in the blade structure at this location is increased, achieving a more uniform mixing effect. The shearing, stretching and mixing capabilities of the blade structure can be further enhanced by shearing through the edges. In this embodiment, the edge 111 is a rectangular edge, and its shape is consistent with the edge of the main blade 11. Of course, in other embodiments, the edge 111 can also be a tapered edge to meet the mixing requirements of materials of different materials.

[0058] At the same time, kneading elements 12 are provided along the axial direction of the main blade 11. Kneading elements 12 are rectangular rods and can be located on one side or on opposite sides of the main blade 11. In this embodiment, kneading elements 12 are provided on both sides of the main blade 11 for illustration. When kneading elements 12 are provided on one side of the main blade 11, the paddle structures 1 alternately provided on the two shaft bodies 2 can still ensure effective mixing of materials. This is not further described here. Kneading elements 12 are located flush with the edge of the main blade 11. The kneading elements 12 coincide with a perpendicular line to the center of gravity of the main blade 11, and one side of the kneading elements 12 is flush with the edge of the main blade 11. This allows the paddle structure 1 to be positioned close to the inner wall of the mixer or other cavity structure when located within the mixer or other cavity structure. As the kneading elements 12 rotate with the shaft body 2, they can promptly scrape away material accumulated on the inner wall of the mixer or cavity structure, thereby agitating and mixing the material while also achieving self-cleaning of the inner wall of the mixer or cavity structure. Furthermore, the kneading element 12 can further stir the material when rotating along with the main blade 11, so that the material fluidity, material distribution, dispersion, mixing and deagglomeration capabilities of the blade structure 1 are further improved during processing.

[0059] In this embodiment, the blade structure 1 also includes an auxiliary blade 13, which is arranged parallel to the main blade 11 and is connected to the main blade 11 through the end of the kneading piece 12 away from the main blade 11, and the edge of the auxiliary blade 13 is flush with the edge of the main blade 11.

[0060] Specifically, the auxiliary blades 13 are parallel to the main blades 11, that is, the auxiliary blades 13 extend in the radial direction of the shaft body 2, and the auxiliary blades 13 and the main blades 11 are respectively located at both ends of the kneading element 12. By arranging the auxiliary blades 13 on the main blades 11, the edges of the auxiliary blades 13 can be utilized to further increase the edges 111 on the shaft body 2 for shearing the material, and the edges of the auxiliary blades 13 are arranged flush with the edges of the main blades 11, that is, the auxiliary blades 13 can be arranged close to the inner wall of the mixer or cavity structure, so that when the kneading element 12 is used to scrape and clean the accumulated material, the auxiliary blades 13 can also stir the accumulated material, ensuring that the material can be continuously stirred and mixed throughout the mixing process, thereby achieving a more uniform mixing effect.

[0061] In this embodiment, the auxiliary blades 13 are planar plates and are not hollowed out. In other embodiments, the auxiliary blades 13 may be hollowed out to further increase the number of edges 111, as well as the fluidity of the logistics back-mixing, which will not be described in detail here. When the auxiliary blades 13 are not hollowed out, while shearing the material, the auxiliary blades 13 along the axial direction of the shaft 2 can prevent the material from quickly flowing to the adjacent blade structure 1 on the same shaft 2, making it easier for the material to flow again to the hollowed-out portion of the main blade 11 of the blade structure 1, that is, multiple back-mixing, which is conducive to multiple shearing of the material and improves the mixing efficiency.

[0062] In this embodiment, both the main blade 11 and the auxiliary blade 13 are fan-shaped blades, wherein the size of the auxiliary blade 13 is 10%-30% of the size of the main blade 11. It should be understood that in this embodiment, the size of the main blade 11 refers to the edge profile size of the main blade 11, while the size of the auxiliary blade 13 also refers to the edge profile size. Furthermore, the size of the auxiliary blade 13 needs to be adjusted based on the number and size of the main blades 11. When the number of main blades 11 increases, the size of the auxiliary blade 13 decreases accordingly, i.e., the size of the auxiliary blade 13 takes the smaller value within the auxiliary blade 13 size range, such as 20%. The actual size of the auxiliary blade 13 should be determined within the above range based on experimental data. This is prior art and will not be elaborated on here. This is to meet the mixing requirements of materials of different materials.

[0063] In this embodiment, the thickness of the main blade 11 is not less than 1 / 10 of the axial distance between two adjacent groups of blade structures 1 on the same shaft 2, and the thickness of the kneading element 12 is less than or equal to the thickness of the main blade 11 and greater than or equal to 3 / 5 of the thickness of the main blade 11.

[0064] Specifically, in this embodiment, the main blades 11 are 4 mm thick, and the axial spacing between the main blades 11 of two adjacent sets of blade structures 1 is 36 mm. This ensures that the length of the kneading elements 12 meets the requirements for self-cleaning and material mixing, preventing situations where the kneading elements 12 are too short or the main blades 11 are insufficiently thick, resulting in insufficient shear force on the material and ineffective material mixing. For illustration purposes only, and not as a limitation, the thickness of the kneading elements 12 can range from 2.4 to 4 mm. By setting corresponding ranges for the thickness of the main blades 11 and kneading elements 12, the main blades 11 shear and stretch the material in the extension direction when the kneading elements 12 rotate. In other words, in addition to the main blades 11, the kneading elements 12 also agitate the material along the radial direction of the shaft 2, further enhancing the mixing effect.

[0065] It will be appreciated that in this embodiment, the thickness of the kneading element 12 varies within the aforementioned thickness range in accordance with the number of main blades 11 in the same set of blade structures 1. Specifically, as the number of main blades 11 increases, the number of edges 111 increases accordingly. While still meeting the requirements for shear mixing of materials, the thickness of the kneading element 12 can be reduced accordingly, thereby effectively mixing materials of different materials and reducing the cost of the blade structure 1. The actual thickness of the kneading element 12 should be determined within the aforementioned range based on experimental data. This is conventional technology and will not be elaborated upon here.

[0066] like Figure 7 、 Figure 8 and Figure 9 As shown, in another embodiment, the blade structure 1 further includes a connecting member 3, which is located between two adjacent main blades 11 of the same group of blade structures 1, a kneading member 12 is provided on the connecting member 3, and the auxiliary blade 13 is connected to the connecting member 3 through the kneading member 12.

[0067] Specifically, the connector 3 is a rod extending radially along the shaft 2 and co-circumferentially with the multiple main blades 11 of the same paddle structure 1. The connectors 3 alternate with the main blades 11, with the ends of the connectors 3 facing away from the shaft 2 flush with the edges of the main blades 11. It should be understood that the secondary blades 13 and kneading elements 12 are not located on the primary blades 11, but are instead supported by separate connectors 3. Positioning the connector 3 between adjacent primary blades 11 allows the connector 3, co-circumferentially with the main blades 11, to shear and deagglomerate the material along the radial direction of the shaft 2 as the shaft 2 rotates. At the same time, the kneading elements 12 and secondary blades 13 still maintain self-cleaning properties and agitate and mix the material. Compared to the method of arranging the kneading element 12 and the auxiliary blade 13 on the main blade 11, the additional connection member 3 is arranged so that the edge of the connection member 3 itself serves as the edge 111, thereby increasing the number of edges 111 of the original blade structure 1 to further improve the mixing effect without occupying space beyond the thickness of the main blade 11.

[0068] In this embodiment, the main blades 11 are detachably connected to the shaft body 2, each main blade 11 extends in a spiral direction and the main blades 11 of the same group of blade structures 1 are located on the same circumference, and there is an inclination angle between the extension direction of the main blades 11 and the plane where the radial direction of the shaft body 2 is located.

[0069] Specifically, the multiple main blades 11 of the same set of blade structures 1 all extend in a spiral direction, with this spiral direction forming an inclination angle with the plane of the radial direction of the shaft body 2, denoted by angle α. The main blades 11 are arranged at this angle α, so that when they rotate with the shaft body 2, they exert an axial force along the axial direction of the shaft body 2, which propels the material. This axial force is generated according to the spiral direction. During rotation, the main blades 11 and the kneading elements 12 shear and stretch the material, and the inclination angle α of the main blades 11 drives the material axially. This method is more cost-effective than providing an additional mechanism to propel the material. Furthermore, compared to methods where the shaft body 2 itself moves the material axially, the material movement process does not cause the shaft body 2 to oscillate, resulting in a more stable state during the continuous movement of the material. Furthermore, the kneading elements 12 are capable of self-cleaning and agitating the material, enabling continuous processing without being affected by material accumulation.

[0070] It should be noted that the multiple main blades 11 are located on the same circumference, rather than being arranged in a spiral direction in sequence. This arrangement allows the flow rate of the material to be adjusted by the rotation speed of the shaft 2 during movement, and the material flow rate will not be too fast, so that the material can be repeatedly mixed and then transferred to the next step, avoiding the need for repeated material processing or the need to further increase the number of blade structures 1 and the length of the shaft 2. In addition, the hollowed-out main blades 11 can extend the residence time of the material when it is mixed by the blade structure 1, that is, through the hollowed-out portion, the material can obtain more continuous shear, stretching, and depolymerization mixing during mixing, the cumulative depolymerization work, shear stress, and shear rate to which the material is subjected are higher, and the mixing performance is better.

[0071] It can be understood that when the inclination angle α is adjusted within the range of 1-10°, the time that the material stays in contact with the main blade 11 with different inclination angles also changes accordingly. The smaller the inclination angle, the longer the residence time, while the larger the inclination angle, the shorter the residence time. Adjusting the inclination angle when processing materials of different materials can change the flow efficiency of the material.

[0072] In this embodiment, the inclination angle ranges from 1 to 10°. That is, α ranges from 1 to 10°. For example, α is 5°. The multiple main blades 11 of the same set of blade structures 1 all align in a spiral direction and have an inclination angle of 5°. The main blades 11 of two adjacent sets of blade structures 1 on the same shaft 2 also have an inclination angle of 5°. This ensures that the axial spacing between the main blades 11 in the two adjacent sets of blade structures 1 remains equal. The main blades 11 of the blade structure 1 on another shaft 2 arranged parallel to the shaft 2 also have an inclination angle of 5°. The difference is that the blade structures 1 on the other shaft 2 are interlaced with the blade structures 1 on the shaft 2 and interlock with each other to fully mix the materials. Furthermore, within the above range, the main blades 11 detachably connected to the shaft 2 are connected via a detachable key, such as a flat key or spline, to adjust the inclination angle between the extension direction of the main blades 11 and the plane of the radial direction of the shaft 2 for different materials. This provides a wider range of applicability and more efficient mixing efficiency for materials of different materials.

[0073] In this embodiment, the sum of the angles of the plurality of main blades 11 of each set of blade structures 1 ranges from 180° to 270°.

[0074] Specifically, the main blade 11 is a fan-shaped structure and has a fan angle, and the sum of the fan angles of the multiple main blades 11 is 180-270°. In this embodiment, the number of main blades 11 ranges from 2 to 10, that is, when the number of main blades 11 is 2 or the number of main blades 11 is 10, the sum of the fan angles of the multiple main blades 11 still satisfies 180-270°. It can be understood that when the number of main blades 11 is small, the fan angle of a single main blade 11 is large and the size of a single main blade 11 is large. On the contrary, when the number of main blades 11 is large, the size of a single main blade 11 is small. The number of main blades 11 and the size of main blades 11 are simulated based on multiple experimental data to obtain the best mixing effect for materials of different materials. This method is a prior art and will not be elaborated on here.

[0075] like Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, each set of blade structures 1 has four 60° main blades 11, and are evenly distributed along the circumference of the shaft body 2. The blade structure 1 consists of three parts: a 60° hollow main blade 11, a kneading member 12, and an auxiliary blade 13. The auxiliary blade 13 has the same fan angle as the main blade 11, that is, 60°. At this time, the blade structures 1 on the two parallel shaft bodies 2 have an initial phase angle of 45°. Of course, in other embodiments, the number of main blades 11 in the blade structure 1 can also be five 48° main blades 11, six 40° main blades 11, or as follows Figure 4 、 Figure 5 and Figure 6The eight main blades 11 with a 30° angle are shown. When the paddle structure 1 has eight main blades 11, the paddle structures 1 on the two parallel shafts 2 have an initial phase angle of 5°. It can be understood that as the number of main blades 11 increases, their dimensions decrease accordingly, while the number of edges 111 on the main blades 11 increases. At the same rotational speed, this paddle structure 1 achieves a greater number of kneading interactions between the main blades 11, kneading elements 12, and auxiliary blades 13, resulting in a stronger tensile and shearing effect on the material. Users can select the appropriate kneading method based on the material being mixed to meet their mixing needs.

[0076] In this embodiment, the blade structures 1 on the two shaft bodies 2 are alternately arranged and the number of the blade structures 1 is the same, and the two shaft bodies 2 have the same rotational speed.

[0077] Specifically, the two shafts 2 rotate at the same speed and in the same or opposite directions. On this basis, the paddle structures 1 on the two parallel shafts 2 are alternately arranged, i.e., the paddle structure 1 on the other shaft 2 is located between two adjacent groups of paddle structures 1 spaced axially on the shaft 2, and is located halfway between the two groups of paddle structures 1, and vice versa. By alternating the paddle structures 1 on the two shafts 2, the paddle structures 1 on each shaft 2 can effectively knead and fully agitate the material when the two shafts 2 rotate. The mixing effect is better when the speeds are the same.

[0078] It can be understood that the kneading elements 12 on different shafts 2 in the alternating blade structure 1 will also knead each other and scrape off the materials accumulated on the main blades 11 on different shafts 2. Specifically, when the kneading elements 12 arranged in the axial direction extend, the main blades 11 of the blade structure 1 located on another shaft 2 and alternating with it also extend in the axial direction and are located in the alternating area. On this basis, the two rotating shafts 2 drive the kneading elements 12 on their respective shafts 2 to knead each other to shear and stretch the materials, thereby stirring the materials to deagglomerate.

[0079] This embodiment also provides a mixer, which includes the above-mentioned blade structure 1.

[0080] Specifically, the mixer includes the aforementioned paddle structure 1 and shaft 2. The paddle structure 1 and shaft 2 are disposed within the mixer, with the edges of the main blades 11 and kneading elements 12 of the paddle structure 1 both having clearances with the mixer's inner wall. The wheelbase between the two parallel shafts 2 is determined based on the mixer's power. This embodiment illustrates a paddle structure 1 comprising four 60° main blades 11 as an example, but this is not intended to be limiting. Furthermore, the mixer has an inner diameter of 64 mm, the wheelbase between the two shafts 2 is 45 mm, the axial spacing between two adjacent sets of paddle structures 1 on the same shaft 2 is 36 mm, the main blades 11 are 4 mm thick, the kneading elements 12 are 20 mm long, the secondary blades 13 are 20% the size of the main blades 11, the kneading gap between the corresponding main blades 11 on two adjacent shafts 2 is 2 mm, the initial phase angle of the main blades 11 on the two shafts 2 is 30°, and the mixer's motor power is 4.5 kW. In this embodiment, dimethyl silicone oil with a viscosity of 10.8 Pa·s and a density of 1000 kg / m 3 , tracer particle size 0.4~0.8mm, density 2000kg / m 3 Mix and refer to Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 The experimental data in the figure show that the mixer with the blade structure 1 has a better mixing effect than the traditional mixer, and the mixing effect is significantly improved.

[0081] like Figure 10 As shown in the figure, the parameters of blade structure 1 in this embodiment are the bar graphs that slope downward from left to right, while the parameters of the conventional blade structure are the bar graphs that slope upward from left to right. Under five speed conditions, the power coefficient of blade structure 1 in this embodiment increased by an average of 16.4% compared to the conventional blade structure.

[0082] like Figure 11 As shown in FIG. 1 , under five rotational speed conditions, the flow rate of the blade structure 1 in this embodiment is increased by an average of 49% compared to the conventional blade structure, which reflects that the blade structure 1 in this embodiment has a stronger driving effect on the material and better fluidity.

[0083] like Figure 12 As shown in FIG. 1 , under five rotational speed conditions, the pumping efficiency of the blade structure 1 in this embodiment is increased by an average of 28.1% compared to the blade structure of the conventional structure, which indicates that the blade structure 1 in this embodiment is more efficient and has lower operating costs.

[0084] like Figure 13As shown in FIG. 1 , under five rotational speed conditions, the average shear rate in the flow field of the blade structure 1 of this embodiment increases by 15.3% compared to the blade structure of the traditional structure, which indicates that the blade structure 1 of this embodiment has a stronger shearing effect on the material.

[0085] like Figure 14 As shown, the parameters of the blade structure 1 in this embodiment are the parameters indicated by the diamond-shaped dotted line in the dotted graph, while the parameters of the conventional blade structure are the parameters indicated by the circular dotted line in the dotted graph. At a rotational speed of 100 r / min, a higher proportion of material in the blade structure 1 in this embodiment experiences high cumulative deagglomeration work than in the conventional blade structure. This indicates that the blade structure 1 in this embodiment has a stronger deagglomeration effect on agglomerates.

[0086] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A blade structure, wherein the blade structure is provided in multiple groups, and the multiple groups of blade structures are alternately arranged on two relatively parallel shafts, characterized in that: The blade structure also includes: A main blade, wherein the main blade is hollowed out along the axial direction of the shaft body, and has a plurality of edges along the radial direction of the shaft body; A kneading piece is provided on the main blade along the axial direction of the shaft, the kneading piece is located on the side of the main blade, the kneading piece is located on the edge of the main blade away from the shaft, and the side of the kneading piece is flush with the edge of the main blade.

2. The blade structure according to claim 1, characterized in that: The blade structure further includes an auxiliary blade, which is arranged parallel to the main blade and connected to the main blade through the end of the kneading element away from the main blade. The edge of the auxiliary blade is flush with the edge of the main blade.

3. The blade structure according to claim 2, characterized in that: The main blade and the auxiliary blade are both fan-shaped blades, wherein the size of the auxiliary blade is 10%-30% of the size of the main blade.

4. The blade structure according to claim 1, wherein: The thickness of the main blade is not less than 1 / 10 of the axial distance between two adjacent groups of the blade structures on the same shaft, and the thickness of the kneading element is less than or equal to the thickness of the main blade and greater than or equal to 3 / 5 of the thickness of the main blade.

5. The blade structure according to claim 2, characterized in that: The blade structure further includes a connecting piece, which is located between two adjacent main blades in the same group of the blade structure. The kneading piece is arranged on the connecting piece, and the auxiliary blade is connected to the connecting piece through the kneading piece.

6. The blade structure according to claim 1, characterized in that: The main blades are detachably connected to the shaft, each main blade extends in a spiral direction, and the main blades of the same group of blade structures are located on the same circumference. There is an inclination angle between the extension direction of the main blade and the plane where the radial direction of the shaft is located.

7. The blade structure according to claim 6, characterized in that: The inclination angle ranges from 1 to 10 degrees.

8. The blade structure according to claim 1, characterized in that: The sum of the angles of the plurality of main blades in each group of the blade structure is in the range of 180-270°.

9. The blade structure according to claim 1, characterized in that: The blade structures on the two shafts are alternately arranged and the number of the blade structures is the same, and the rotational speeds of the two shafts are the same.

10. A mixer, characterized in that: The mixer comprises a blade structure according to any one of claims 1 to 9.

Images