High shear force solid phase chemical mill disc

Abstract

The application belongs to the field of chemical material processing equipment, and particularly relates to a solid-phase force chemical grinding disc with high shearing force, which is suitable for a solid-phase force chemical reactor and applied to the field of preparation of high polymer materials and composite materials. The solid-phase force chemical grinding disc is provided with pile teeth with multi-prism platform structure on the inclined plane of the grinding teeth to provide additional shearing force. The application innovates the targeted structure of the disc surface, constructs the pile teeth with multi-prism platform structure on the inclined plane of the grinding teeth to provide additional shearing force, and systematically improves the overall structure of the grinding disc based on the pile tooth structure, so that the grinding disc has stronger three-dimensional shearing force during grinding, thereby improving the shearing grinding efficiency of the high polymer materials.

Description

Technical Field

[0001] This invention belongs to the field of chemical material processing equipment, specifically relating to a high-shear-force solid-phase mechanical chemical grinding disc. This grinding disc is suitable for solid-phase mechanical chemical reactors and is applied in the field of preparing polymer materials and their composite materials. Background Technology

[0002] Mechanochemistry studies chemical reactions or physicochemical changes caused by stress, and is considered one of the four major branches of chemistry, along with thermochemistry, electrochemistry, and photochemistry. Polymer mechanochemistry is an interdisciplinary field built on the foundations of polymer chemistry and mechanics. It mainly studies the breakage, activation, generation of macromolecular free radicals, and initiation of mechanochemical reactions in solid polymers under stress, and can provide new methods and approaches for the preparation, modification, and recycling of polymer materials.

[0003] Conventional pulverizing equipment, primarily based on impact force, cannot perform ultrafine pulverization of viscoelastic polymers at room temperature. Xu Xi, Wang Qi, and others from the State Key Laboratory of Polymer Materials at Sichuan University, based on the principles of solid-state mechanochemistry, invented a solid-state mechanochemical reactor with a unique three-dimensional shear structure, also known as a solid-state shear grinding device, and established and developed new theories and technologies for solid-state shear grinding. The core structure of this solid-state mechanochemical reactor consists of two opposing grinding discs. During the grinding process, the two discs rotate relative to each other, forming grinding chambers. The shape and volume of these chambers undergo periodic changes during the grinding process, creating a powerful three-dimensional shear field, and possessing multiple functions including pulverization, dispersion, mixing, and mechanochemical reactions.

[0004] Based on the above research results, Sichuan University applied for the invention patent "Mechanochemical Reactor" (ZL 95111258.9) on March 6, 1995. The related achievement "Solid-phase Mechanochemical Reactor and its Application in the Preparation and Processing of Polymer Materials" won the second prize of the National Technological Invention Award in 2006. Summary of the Invention

[0005] To further improve the shear force field and mechanochemical effect of solid-phase mechanochemical reactors, this invention provides a high-shear-force solid-phase mechanochemical grinding disc. It features a targeted structural innovation on the disc surface, constructing multi-faceted peg teeth on the inclined plane of the grinding teeth to provide additional shear force. Furthermore, based on this peg tooth structure, the overall structure of the grinding disc is systematically improved, endowing the disc with stronger three-dimensional shear force during grinding, thereby improving the shearing and grinding efficiency of polymer materials.

[0006] To achieve the above objectives, the present invention employs a technical solution consisting of the following technical measures.

[0007] A high-shear-force solid-phase mechanochemical grinding disc has multi-faceted truncated pegs constructed on the inclined plane of the grinding teeth to provide additional shear force.

[0008] Furthermore, the number of edges of the peg tooth in the multi-faceted structure is preferably 3 to 10.

[0009] Furthermore, the shape of the peg tooth with the multi-faceted structure can be a regular multi-faceted frustum or a non-standard multi-faceted frustum such as an oblique multi-faceted frustum, and the angle between the edge and its projection on the grinding plane is 30~90°.

[0010] Typically, the size of the post teeth can be adjusted based on the size of the grinding disc, especially the area of ​​the inclined plane of the grinding teeth. In one technical solution, when the disc radius is 200~350 cm, the outer diameter of the post teeth is 1~7 mm.

[0011] Typically, the pile teeth do not exceed the height of the grinding teeth. Those skilled in the art, based on the prior authorized invention patent "Mechanical Chemical Reactor" (ZL 95111258.9), know that a solid-phase mechanical chemical reactor is based on two opposing grinding discs rotating relative to each other. Therefore, the pile teeth do not exceed the height of the grinding teeth to avoid affecting the relative rotation of the grinding discs.

[0012] It should be further explained that one of the two facing grinding discs serves as a fixed grinding disc, and the other as a rotating grinding disc, with the disc surfaces of the fixed and rotating discs staggered. The staggered disc surfaces are formed by the interlacing of the inclined planes of the grinding teeth when the grinding discs are placed facing each other, creating a grinding chamber, as shown in the appendix to the instruction manual. Figure 7 As shown.

[0013] Furthermore, the height of the peg teeth in the multi-faceted structure is preferably not less than 0.1 mm, provided that the height of the peg teeth does not exceed the height of the ground teeth, in order to provide sufficient additional shear force.

[0014] Preferably, the post tooth has a regular square frustum structure, with a bottom surface side length of 1~3 mm, an upper surface side length of 0.1~2 mm, and a height of 0.2~0.8 mm.

[0015] Typically, the pegs can be distributed on the grinding tooth inclined planes of two opposing grinding discs, or they can be distributed on the grinding tooth inclined planes of only one of the grinding discs; the pegs can be distributed on all grinding tooth inclined planes, or they can be distributed on only some grinding tooth inclined planes.

[0016] Furthermore, the post teeth are spaced out on the grinding tooth inclined plane, that is, only one grinding tooth inclined plane is constructed on every two adjacent grinding tooth inclined planes; or post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes, and then no post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes.

[0017] Typically, the distribution of teeth on the grinding inclined plane includes, but is not limited to, linear arrangement, circumferential arrangement, rectangular arrangement, or staggered arrangement. The spacing between adjacent teeth can be adjusted according to their distribution and the area of ​​the grinding inclined plane. For example, when the disk radius is 200~350 cm, the spacing between adjacent teeth is preferably 5~15 mm.

[0018] Furthermore, the inclined planes of the grinding teeth intersect to form a grinding chamber when the grinding discs are placed facing each other. When both grinding discs are constructed with distributed peg teeth, the peg teeth facing each other form a shearing engagement in the grinding chamber during the movement.

[0019] Preferably, to further enhance the maximum shearing force of the grinding disc, the peg teeth are staggered and distributed on the inclined plane of the grinding teeth, with two rows of peg teeth along the length of the inclined plane of the grinding teeth. The distance between adjacent peg teeth in the same row is 4~6 mm, and the angle formed by the line connecting the center point of the bottom surface of any peg tooth and the center points of the bottom surfaces of the two most adjacent peg teeth in a different row is 88~92°; more preferably, the distance between adjacent peg teeth in the same row is 4.8~5.2 mm.

[0020] Typically, the solid-phase mechanochemical grinding disc has a split structure, including a disc base and a disc surface. The disc base and the disc surface are detachably connected. The disc surface is composed of multiple sector-shaped disc blocks, and each sector-shaped disc block is composed of multiple grinding teeth arranged in parallel. The cross-section of each grinding tooth in the direction perpendicular to the disc base is a trapezoidal structure. The angle between the lower base of the trapezoidal structure and the inclined plane of the grinding tooth is 30~35°, the length of the lower base is 11~12mm, and the height is 3.9~4.1mm.

[0021] Furthermore, in two opposing grinding discs, the angle of intersection of the grinding tooth inclined planes of the trapezoidal structure of the aforementioned grinding teeth when they face each other is determined by the number of sector-shaped disc blocks. Preferably, the disc is composed of 8 sector-shaped disc blocks, and the top edge of the grinding tooth inclined plane is parallel to one of the sector radius edges of the sector-shaped disc block.

[0022] Typically, the solid-phase mechanochemical grinding disc can be made of polymer materials, metal materials, ceramic materials, etc., and is used in the field of preparing polymer materials and their composite materials.

[0023] In this paper, the high-shear-force solid-phase mechanochemical grinding disc can be directly applied to the mechanochemical reactor disclosed in the prior patent ZL95111258.9 and the mechanochemical reactor based on the principle of the aforementioned prior patent.

[0024] Typically, when the solid-phase mechanochemical grinding disc described in this invention is applied to the mechanochemical reactor disclosed in the prior authorized patent ZL 95111258.9, it can serve as the "rotating grinding disc" and / or "fixed grinding disc" described in that patent. That is, the mechanochemical reactor is fixed to the shell by the fixed grinding disc, and the rotating grinding disc is fixed to the rotating shaft on the support. The rotating grinding disc is driven to rotate by the rotating shaft on the transmission device driven by the motor. The grinding surface spacing or pressure is adjusted by the handle. The entire system is closed. Cooling water or heating medium is introduced through the inlet to regulate the temperature. Inert gas is introduced through the outlet side for protection. The material continuously enters the grinding disc from the feeding hopper through the feeding screw to undergo the force reaction. The reactants are discharged from the outlet through the feeding hose.

[0025] For further details on the specific structure, please refer to the prior patent of this invention, "Mechanochemical Reactor" (ZL95111258.9).

[0026] The main inventive point of this invention is that by constructing a multi-faceted truncated peg structure on the inclined plane of the grinding teeth of the grinding disc, additional shearing force is provided, further increasing the shearing force during grinding.

[0027] Through comparative experiments, the influence of the grinding disc tooth structure on the dynamic shear stress field was studied using the computational fluid dynamics (CFD) software Flow Simulation. It was found that the shape, height, density and distribution of the teeth greatly affect the maximum shear force during grinding.

[0028] Secondly, a millstone model was created using SOLIDWORKS 3D modeling software. A transparent millstone model made of resin material was then fabricated using 3D printing photopolymerization technology. Finally, using an acrylic substrate, motor, and other equipment, a visible and transparent SOLIDWORKS model was manufactured. 3 The M-equipment underwent physical verification through simulation experiments. This organic combination of simulation analysis and physical verification demonstrates a certain degree of scientific rigor and provides theoretical and experimental support for grinding wheel research.

[0029] The present invention has the following beneficial effects:

[0030] 1. This invention provides a high-shear-force solid-phase chemical grinding disc, which features a targeted structural innovation on the disc surface. A multi-faceted peg structure is constructed on the inclined plane of the grinding teeth to provide additional shear force. Furthermore, based on this peg structure, the overall structure of the grinding disc is systematically improved, giving the grinding disc a stronger three-dimensional shear force during grinding, thereby improving the shearing and grinding efficiency of polymer materials.

[0031] 2. Through comparative experiments on post teeth, this invention has found that the shape, height, density, and distribution of post teeth greatly affect the maximum shear force during grinding, and based on this, provides a preferred implementation method. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the disk surface described in Embodiment 1 of the present invention.

[0033] Figure 2 This is a front view of the disk surface described in Embodiment 1 of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the sector-shaped disk block described in Embodiment 1 of the present invention.

[0035] Figure 4 This is a schematic diagram of the cross-sectional shape of the fan-shaped disk block in Embodiment 1 of the present invention in the direction perpendicular to the grinding surface.

[0036] Figure 5 This is a schematic diagram of the post tooth structure described in Embodiment 1 of the present invention.

[0037] Figure 6 This is a schematic diagram illustrating the specific arrangement of the post teeth on the grinding tooth inclined plane as described in Embodiment 1 of the present invention.

[0038] Figure 7 This is a schematic diagram showing how the grinding tooth inclined planes are staggered to form a grinding chamber when the grinding discs are placed facing each other.

[0039] Figure 8 The above are schematic diagrams of comparative examples 2 to 6 of this invention, with the shape of the post tooth as a variable.

[0040] Figure 9 The figures show the comparison of the maximum equivalent shear stress obtained from simulation experiments in Comparative Examples 1 to 6 of this invention.

[0041] Figure 10 These are schematic diagrams of comparative examples 7, 3, 8-11 of the present invention, using the height of the peg tooth as a variable.

[0042] Figure 11 The figures show the comparison of the maximum equivalent shear stress obtained from simulation experiments for comparative examples 7, 3, 8-11 of this invention.

[0043] Figure 12 The above are schematic diagrams of comparative examples 10, 12-15 of the present invention, using different distribution spacing of the post teeth as variables.

[0044] Figure 13 The figures show the comparison of the maximum equivalent shear stress obtained from simulation experiments in Comparative Examples 10, 12-15 of this invention.

[0045] Figure 14 The above are schematic diagrams of comparative examples 13, 16-20 of the present invention, using different distribution patterns of post teeth as variables.

[0046] Figure 15The above are comparative line graphs of the maximum equivalent shear stress obtained from simulation experiments in Comparative Examples 13, 16-20 of this invention.

[0047] Figure 16 This is a summary diagram of the actual grinding test results of Embodiment 1 and Comparative Example 1 of the present invention. From left to right, the diagram shows a photograph of unground starch granules, a photograph of granules after one grinding by the grinding disc of Comparative Example 1, a photograph of granules after one grinding by the grinding disc of Embodiment 1, and a comparison diagram of particle size distribution after one grinding. "new" corresponds to the grinding disc provided in Embodiment 1, and "original" corresponds to the grinding disc provided in Comparative Example 1.

[0048] Figure 17 This is a summary diagram of the actual grinding test results of Embodiment 1 and Comparative Example 1 of the present invention. The upper left is a photo of the unground clay, the upper middle is a photo of the clay after one grinding by the grinding disc of Comparative Example 1, the upper right is a photo of the clay after one grinding by the grinding disc of Embodiment 1, and the lower part is a comparison diagram of the aspect ratio distribution of the clay after one grinding. New corresponds to the grinding disc provided in Embodiment 1, and 30° corresponds to the grinding disc provided in Comparative Example 1. Detailed Implementation

[0049] To further understand the present invention, preferred embodiments are described below with reference to examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the scope of the claims. Those skilled in the art can refer to the content of this document to appropriately improve the process parameters. In particular, it should be noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included within the scope of the present invention. The methods and applications of the present invention have been described through preferred embodiments, and those skilled in the art can obviously make modifications or appropriate changes and combinations to the methods and applications described herein without departing from the content, spirit and scope of the present invention to realize and apply the technology of the present invention. Although it is believed that those skilled in the art will fully understand the following terms, the following definitions are set forth to help illustrate the subject matter disclosed in the present invention.

[0050] A high-shear-force solid-phase mechanochemical grinding disc has multi-faceted truncated pegs constructed on the inclined plane of the grinding teeth to provide additional shear force.

[0051] Furthermore, in one embodiment, the number of edges of the peg tooth of the multi-faceted structure is preferably 3 to 10, for example, the number of edges can be 3, 4, 5, 6, 7, 8, 9 or 10.

[0052] Furthermore, in one embodiment, the peg tooth of the multi-faceted structure can be a regular multi-faceted frustum or a non-standard multi-faceted frustum such as an oblique multi-faceted frustum, and the angle between the edge and its projection on the grinding plane is 30~90°, for example 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90° or any range or point value between them.

[0053] Typically, the size of the post teeth can be adjusted based on the size of the grinding disc, particularly the area of ​​the inclined plane of the grinding teeth. In one embodiment, when the disc radius is 200-350 cm, the outer diameter of the post teeth is 1-7 mm, for example, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, or any range or point value between them.

[0054] Typically, the pile teeth do not exceed the height of the grinding teeth. Those skilled in the art, based on the prior authorized invention patent "Mechanical Chemical Reactor" (ZL 95111258.9), know that a solid-phase mechanical chemical reactor is based on two opposing grinding discs rotating relative to each other. Therefore, the pile teeth do not exceed the height of the grinding teeth to avoid affecting the relative rotation of the grinding discs.

[0055] It should be further explained that one of the two facing grinding discs serves as a fixed grinding disc, and the other as a rotating grinding disc, with the disc surfaces of the fixed and rotating discs staggered. The staggered disc surfaces are formed by the interlacing of the inclined planes of the grinding teeth when the grinding discs are placed facing each other, creating a grinding chamber, as shown in the appendix to the instruction manual. Figure 7 As shown.

[0056] Furthermore, in one embodiment, the height of the peg tooth of the frustum structure is preferably not less than 0.1 mm, provided that the peg tooth does not exceed the height of the grinding tooth, in order to provide sufficient additional shear force, for example, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm or any range or point value between them.

[0057] In one preferred embodiment, the post tooth is a regular square frustum structure, with the side length of the lower base being 1~3 mm, for example 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or any range or point value between them; the side length of the upper base being 0.1~2 mm, for example 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm or any range or point value between them; and the height being 0.2~0.8 mm, for example 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm or any range or point value between them.

[0058] Typically, the pegs can be distributed on the grinding tooth inclined planes of two opposing grinding discs, or they can be distributed on the grinding tooth inclined planes of only one of the grinding discs; the pegs can be distributed on all grinding tooth inclined planes, or they can be distributed on only some grinding tooth inclined planes.

[0059] Furthermore, in one embodiment, the post teeth are spaced out on the grinding tooth inclined plane, that is, only one grinding tooth inclined plane is constructed on every two adjacent grinding tooth inclined planes; or post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes, and then no post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes.

[0060] Typically, in one embodiment, the distribution of the pegs constructed on the grinding inclined plane includes, but is not limited to, linear arrangement, circumferential arrangement, rectangular arrangement, or staggered arrangement. The spacing between adjacent pegs can be adapted and adjusted according to their distribution and the area of ​​the grinding inclined plane. For example, when the disk radius is 200~350 cm, the spacing between adjacent pegs is preferably 5~15 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, or any range or point value between them.

[0061] Furthermore, in one embodiment, the inclined planes of the grinding teeth are staggered to form a grinding chamber when the grinding discs are placed facing each other. When both grinding discs are constructed with distributed peg teeth, the facing peg teeth form a shearing engagement in the grinding chamber during the movement.

[0062] In one preferred embodiment, to further enhance the maximum shear force of the grinding disc, the peg teeth are staggered and distributed on the inclined plane of the grinding teeth, with two rows of peg teeth along the length of the inclined plane of the grinding teeth. The spacing between adjacent peg teeth in the same row is 4~6 mm, and the angle formed by the line connecting the center point of the bottom surface of any peg tooth and the center points of the bottom surfaces of the two most adjacent peg teeth in a different row is 88~92°; more preferably, the spacing between adjacent peg teeth in the same row is 4.8~5.2 mm.

[0063] Typically, the solid-phase mechanochemical grinding disc is a split structure, including a disc base and a disc surface. The disc base and the disc surface are detachably connected. The disc surface is composed of multiple fan-shaped disc blocks, and each fan-shaped disc block is composed of multiple grinding teeth arranged in parallel. In one embodiment, the cross-section of the grinding teeth in the direction perpendicular to the disc base is a trapezoidal structure. The angle between the lower base of the trapezoidal structure and the inclined plane of the grinding tooth is 30~35°, the length of the lower base is 11~12mm, and the height is 3.9~4.1mm.

[0064] Furthermore, in one embodiment, in two opposing grinding discs, the angle of intersection of the grinding tooth inclined planes of the trapezoidal structure of the grinding teeth when they face each other is determined by the number of sector disc blocks. Preferably, the disc is composed of 8 sector disc blocks, and the top edge of the grinding tooth inclined plane is parallel to one of the sector radius edges of the sector disc block.

[0065] Typically, the solid-phase mechanochemical grinding disc can be made of polymer materials, metal materials, ceramic materials, etc., and is used in the field of preparing polymer materials and their composite materials.

[0066] In this paper, the high-shear-force solid-phase mechanochemical grinding disc can be directly applied to the mechanochemical reactor disclosed in the prior patent ZL95111258.9 and the mechanochemical reactor based on the principle of the aforementioned prior patent.

[0067] Typically, when the solid-phase mechanochemical grinding disc described in this invention is applied to the mechanochemical reactor disclosed in the prior authorized patent ZL 95111258.9, it can serve as the "rotating grinding disc" and / or "fixed grinding disc" described in that patent. That is, the mechanochemical reactor is fixed to the shell by the fixed grinding disc, and the rotating grinding disc is fixed to the rotating shaft on the support. The rotating grinding disc is driven to rotate by the rotating shaft on the transmission device driven by the motor. The grinding surface spacing or pressure is adjusted by the handle. The entire system is closed. Cooling water or heating medium is introduced through the inlet to regulate the temperature. Inert gas is introduced through the outlet side for protection. The material continuously enters the grinding disc from the feeding hopper through the feeding screw to undergo the force reaction. The reactants are discharged from the outlet through the feeding hose.

[0068] For further details on the specific structure, please refer to the prior patent of this invention, "Mechanochemical Reactor" (ZL95111258.9).

[0069] The main inventive point of this invention is that by constructing a multi-faceted truncated peg structure on the inclined plane of the grinding teeth of the grinding disc, additional shearing force is provided, further increasing the shearing force during grinding.

[0070] Through comparative experiments, the influence of the grinding disc tooth structure on the dynamic shear stress field was studied using the computational fluid dynamics (CFD) software Flow Simulation. It was found that the shape, height, density and distribution of the teeth greatly affect the maximum shear force during grinding.

[0071] Secondly, a millstone model was created using SOLIDWORKS 3D modeling software. A transparent millstone model made of resin material was then fabricated using 3D printing photopolymerization technology. Finally, using an acrylic substrate, motor, and other equipment, a visible and transparent SOLIDWORKS model was manufactured. 3 The M-equipment underwent physical verification through simulation experiments. This organic combination of simulation analysis and physical verification demonstrates a certain degree of scientific rigor and provides theoretical and experimental support for grinding wheel research.

[0072] The present application will be further explained in detail below with reference to embodiments. However, those skilled in the art should understand that these embodiments are provided for illustrative purposes only and are not intended to limit the present application.

[0073] Example

[0074] The embodiments of this application will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be construed as limiting the scope of this application. Where specific conditions are not specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply. Where the manufacturers of reagents or instruments are not specified, they are all commercially available conventional products. This application should not be construed as being limited to the specific embodiments described.

[0075] Example 1

[0076] This embodiment provides a high shear force solid-state mechanical chemical grinding disc, which is a split structure including a disc base and a disc surface, and the disc base and the disc surface are fixedly connected by bolts;

[0077] like Figures 1-4 As shown, the disk surface is composed of eight sector-shaped disk blocks 2, and the sector-shaped disk blocks 2 are composed of multiple grinding teeth 202 arranged in parallel.

[0078] The grinding tooth 202 has a right-angled trapezoidal cross-section perpendicular to the disk seat direction. The lower base angle of the right-angled trapezoidal structure is 30°, the lower base side length is 11.7mm, and the height is 4mm.

[0079] On the inclined plane of the grinding teeth corresponding to the inclined waist of the right trapezoidal structure, a post tooth 7 is constructed, as shown below. Figure 5 As shown, the pile tooth 7 is a truncated pyramid structure. The upper base of the truncated pyramid structure is a square with a side length of 1mm, and the lower base is a square with a side length of 2mm. The center point of the upper base is on the vertical line of the center point of the lower base, and the height is 0.30mm.

[0080] The teeth are staggered on the inclined plane of the grinding teeth, and there are two rows of teeth along the length of the inclined plane of the grinding teeth. The specific arrangement is as follows: Figure 6 As shown, the spacing θ between adjacent pile teeth in the same column is 5mm, and the angle β formed by the line connecting the center point of the bottom surface of any pile tooth and the center points of the bottom surfaces of the two most adjacent pile teeth in different columns is 90°.

[0081] Based on the solid-phase mechanochemical grinding disc provided in Example 1, it is modeled as a fixed grinding disc and a rotating grinding disc, respectively, with the disc surfaces of the fixed and rotating grinding discs arranged in an alternating pattern. The alternation of the disc surfaces is achieved by the interlacing of the inclined planes of multiple grinding teeth in a face-to-face grinding disc configuration to form a grinding chamber, as shown in the appendix to the specification. Figure 7 As shown.

[0082] Simulation experiments were conducted using pile tooth shape, pile tooth height, pile tooth spacing, and pile tooth distribution as variables.

[0083] Computer simulation technology based on computational fluid dynamics (CFD) combines macroscopic simulation and microscopic analysis. It can simulate the material movement inside the entire grinding chamber, as well as the interaction forces between the material and the equipment structure in direct contact. This is more conducive to the optimization of equipment structural parameters and provides a new path for the optimization research of solid crushing equipment.

[0084] In the simulation experiment, the grinding disc structure was designed using SOLIDWORKS modeling software; the simulation experiment was conducted using the fluid dynamics (CFD) software SOLIDWORKS Flow Simulation. The simulation conditions for SOLIDWORKS Flow Simulation were as follows: Inlet volumetric flow rate: The circular void at the center of the disc was used as the inlet flow channel, and its flow rate was set to 0.00001 m³ / s. 3 / s; Exit boundary: Set the outer edge of the disk to "free exit" (ambient pressure 1 atm); Wall boundary: The fixed grinding disk is stationary during the grinding process, and here it is set to "real wall (stator)", that is, the rotation speed in the coordinate system is 0 rad / s; Rotation direction: The grinding disk rotates counterclockwise, and the rotation speed is 12.56 rad / s; Minimum gap: Set the minimum gap size in the flow field (Min gap) = 0.5 mm.

[0085] A millstone model was created using SOLIDWORKS 3D modeling software. A transparent millstone model made of resin material was fabricated using 3D printing photopolymerization technology. Finally, using an acrylic substrate, motor, and other equipment, a visible and transparent SOLIDWORKS model was manufactured. 3 Equipment M is used for simulation and verification experiments.

[0086] like Figure 8 As shown, based on the right-angled trapezoidal structure of the grinding teeth, when the lower base angle is 30°, a post tooth is constructed on the inclined plane of the grinding teeth. Using the shape of the post tooth as a variable, simulation experiments were conducted on post teeth with triangular, quadrangular, pentagonal, octagonal, and decapod structures, respectively denoted as triangular, quadrangular, pentagonal, octagonal, and decapod structures. These are used as comparative examples 2-6, with example 1 (without post teeth constructed on the inclined plane of the grinding teeth) serving as a control. In comparative examples 2-6, the diameter of the circumcircle of the regular polygon corresponding to the lower base of the post tooth is... mm, the tooth height is 0.6mm, and the diameter of the circumcircle of the regular polygon corresponding to the upper base is . mm, the specific distribution of the post teeth is that the post teeth are arranged in two rows along the length of the inclined plane of the grinding tooth, such as Figure 6 As shown, the included angle β formed by the lines connecting the center point of the bottom surface of any tooth to the center points of the bottom surfaces of the two adjacent teeth in a non-column column is 90°, and the spacing θ between adjacent teeth in the same column is 6mm.

[0087] By analyzing the results of the simulation experiment, such as Figure 9 As shown, the pile teeth with a frustum shape can enhance the maximum shear force compared to those without pile teeth, with the pile teeth with a quadrangular frustum shape having the best maximum shear force.

[0088] like Figure 10 As shown, based on the right-angled trapezoidal structure of the grinding tooth with a lower base angle of 30°, a truncated pyramidal tooth is constructed on the inclined plane of the grinding tooth. Simulation experiments were conducted with tooth heights of 0.7mm, 0.6mm, 0.5mm, 0.4mm, 0.3mm, and 0.2mm, respectively, denoted as grinding tooth inclination angle 30° + truncated pyramidal tooth height 0.7mm, grinding tooth inclination angle 30° + truncated pyramidal tooth height 0.6mm, and grinding tooth inclination angle 30° + truncated pyramidal tooth height 0.6mm, respectively. Examples of tooth heights are given: 0.5mm for the post tooth, 0.4mm for the post tooth with a grinding tooth inclination angle of 30°, 0.3mm for the post tooth with a grinding tooth inclination angle of 30°, and 0.2mm for the post tooth with a grinding tooth inclination angle of 30°. These are presented as comparative examples 7, 3, 8-11. In comparative examples 7, 3, 8-11, the lower base of the post tooth is a square with a side length of 2mm, and the upper base is a square with a side length of 1mm. The post teeth are distributed in two rows along the length of the grinding tooth inclined plane. Figure 6As shown, the included angle β formed by the lines connecting the center point of the bottom surface of any tooth to the center points of the bottom surfaces of the two adjacent teeth in a non-column column is 90°, and the spacing θ between adjacent teeth in the same column is 6mm.

[0089] By analyzing the results of the simulation experiment, such as Figure 11 As shown, the height of the post tooth significantly affects the maximum shear force and exhibits an irregular pattern. When the post tooth height is 0.3 mm, it has a significantly better maximum equivalent shear stress.

[0090] like Figure 12 As shown, based on the right-angled trapezoidal structure of the grinding teeth, when the lower base angle is 30°, a truncated quadrangular pile tooth is constructed on the inclined plane of the grinding teeth. Simulation experiments were conducted for different spacings of the pile teeth. Specifically, the pile teeth are arranged in two rows along the length of the inclined plane of the grinding teeth, as shown in the figure. Figure 6 As shown, the included angle β formed by the lines connecting the center point of the lower bottom surface of any tooth to the center points of the lower bottom surfaces of the two adjacent teeth in a non-column is 90°. Simulation experiments were conducted for the spacing θ between adjacent teeth in the same column, which are 6mm, 5.5mm, 5mm, 4.5mm, and 4mm, respectively. These are denoted as frustum tooth height 0.3mm + spacing 6mm, frustum tooth height 0.3mm + spacing 5.5mm, frustum tooth height 0.3mm + spacing 5mm, frustum tooth height 0.3mm + spacing 4.5mm, and frustum tooth height 0.3mm + spacing 4mm, respectively. These are used as comparative examples 10 and 12~15. In comparative examples 10 and 12~15, the lower bottom surface of the tooth is a square with a side length of 2mm and a height of 0.3mm, and the upper bottom surface is a square with a side length of 1mm.

[0091] By analyzing the results of the simulation experiment, such as Figure 13 As shown, the pile tooth spacing has a relatively small impact on the maximum shear force, and the optimal pile tooth spacing is 4.5~5 mm.

[0092] like Figure 14 As shown, when the lower base angle of the right trapezoidal structure of the grinding tooth is 30°, a truncated quadrangular tooth is constructed on the inclined plane of the grinding tooth. Simulation experiments were conducted on different distribution patterns of the tooth. Specifically, the arrangement function in the SOLIDWORKS modeling software was used to arrange the tooth in staggered, circular, linear, matrix, interval arrangement 1, and interval arrangement 2, with the spacing parameter set to 5 mm. These are respectively denoted as staggered, circular, linear, matrix, interval arrangement 1, and interval arrangement 2, and are used as comparative examples 13 and 16~20. In comparative examples 13 and 16~20, the lower base of the tooth is a square with a side length of 2 mm and a height of 0.3 mm, and the upper base is a square with a side length of 1 mm.

[0093] By analyzing the results of the simulation experiment, such as Figure 15As shown, under specific staggered arrangement of the pegs and teeth, the maximum shear force can be greatly increased. The maximum equivalent shear stress can reach 29.3 MPa, which is 350% higher than that of the original grinding disc.

[0094] like Figure 16 As shown, based on the grinding discs provided in Comparative Example 1 (without pegs) and Example 1, actual grinding tests of starch granules were conducted. It was found that the grinding disc in Example 1 produced finer particles and had a better grinding effect after one grinding.

[0095] like Figure 17 As shown, based on Comparative Example 1 (without piling teeth) and the grinding disc provided in Example 1, actual grinding tests of clay particles were conducted. Compared with the solid phase mechanochemical grinding disc provided in Example 1, it was found that Example 1 had the best overall particle length-to-diameter ratio and distribution after one grinding, and the best grinding effect.

[0096] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A high-shear-force solid-state mechanical chemical grinding disc, characterized in that: Multi-faceted peg teeth are constructed on the inclined plane of the grinding teeth of the grinding disc to provide additional shear force.

2. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The number of edges in the pile teeth of the multi-faceted structure is 3 to 10.

3. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The peg tooth of the multi-faceted structure can be a regular multi-faceted frustum or a non-standard multi-faceted frustum, and the angle between the edge and its projection on the grinding plane is 30~90°.

4. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The post tooth does not exceed the height of the ground tooth, and the height is not less than 0.1 mm.

5. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The pegs can be distributed and constructed on the grinding tooth inclined plane of two grinding discs placed opposite each other, or they can be distributed and constructed only on the grinding tooth inclined plane of one of the grinding discs. The post teeth can be distributed and constructed on all the grinding tooth inclined planes, or they can be distributed and constructed only on some of the grinding tooth inclined planes.

6. The solid-state mechanochemical milling disc according to claim 5, characterized in that: The post teeth are spaced out and constructed on the grinding tooth inclined plane, that is, only one grinding tooth inclined plane is constructed on every two adjacent grinding tooth inclined planes; or post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes, and then no post teeth are constructed on 2 to 5 consecutive grinding tooth inclined planes.

7. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The distribution of teeth on the grinding inclined plane can include linear arrangement, circumferential arrangement, rectangular arrangement, or staggered arrangement; the spacing between adjacent teeth can be adjusted according to their distribution and the area of ​​the grinding inclined plane.

8. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The grinding teeth are staggered to form a grinding chamber when the grinding discs are placed facing each other. When both grinding discs are equipped with pile teeth, the pile teeth will form a shearing engagement in the grinding chamber during the movement.

9. The solid-state mechanochemical milling disc according to claim 1, characterized in that: The solid-phase mechanochemical grinding disc has a split structure, including a disc base and a disc surface. The disc base and the disc surface are detachably connected. The disc surface is composed of multiple sector-shaped disc blocks. Each sector-shaped disc block is composed of multiple grinding teeth arranged in parallel. The cross-section of each grinding tooth in the direction perpendicular to the disc base is a trapezoidal structure. The angle between the lower base of the trapezoidal structure and the inclined plane of the grinding tooth is 30~35°. The length of the lower base is 11~12mm and the height is 3.9~4.1mm.

10. The high-shear solid-phase mechanochemical milling disc as described in claim 1 is applied to the field of preparing polymer materials and their composite materials.

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