Centrifugal occlusion type crusher

Abstract

A centrifugal meshing type pulverizer comprises a shell, a meshing type rotary disc, a flow dividing cover and a grading wheel, and teeth of a main rotary disc and teeth of a gear ring are meshed with each other to form meshing gaps; an arc-shaped material guide strip of the cyclone material guide plate is used for guiding materials to the occlusion gap by utilizing centrifugal force; a first annular channel is formed between the outer ring and the middle ring, a second annular channel is formed between the middle ring and the inner ring, and a plurality of arc-shaped striker plates are arranged in the first annular channel; and the grading wheel is arranged above the flow dividing cover and matched with the inner ring, and the grading wheel drives airflow to form guiding airflow in the second annular channel. According to the invention, centrifugal force, occlusal force, cyclone guiding and an accurate material grading system are combined, so that the problem of low efficiency of an existing crusher during treatment of fiber dry materials is effectively solved, and the crushing efficiency and grading precision of the equipment are remarkably improved through an optimized cyclone flow field, a material backflow mechanism and an airflow control system.

Description

Technical Field

[0001] This invention relates to the field of crushing equipment, and in particular to a centrifugal crushing machine that integrates high-strength biting crushing, centrifugal feeding, and two-stage swirl classification. Background Technology

[0002] Currently, industries such as feed, chemicals, and pharmaceuticals have placed higher demands on the capacity, energy consumption, fineness, and cost control of crushing equipment, leading to continuous upgrading and replacement of crushing equipment.

[0003] Existing pulverizers mainly include hammer mills, disc mills, and air jet mills. For example, disc mills pulverize materials through the high-speed rotation of discs. Pulverizers with grading functions separate coarse and fine materials through grading wheels.

[0004] However, existing technologies still have the following shortcomings:

[0005] First, there are issues with crushing efficiency and structure. Conventional crushers typically have a planar main disc, lacking radial crushing enhancement. Existing equipment lacks sufficient shearing and crushing force for fibrous dry materials (such as wheat bran, rice husks, and corn stalks), resulting in low crushing efficiency. In actual production, when processing fibrous materials, the crushing efficiency is 40-50% lower than when processing granular materials, while energy consumption increases by more than 30%.

[0006] Secondly, there are issues with airflow control and wear. The material circulation flow field inside traditional grinding chambers is chaotic, lacking effective control and guidance of the rising swirling flow. This disordered movement of material within the chamber not only reduces grinding efficiency but also causes excessive wear on the inner wall of the outer ring. Statistics show that the service life of the inner wall of the outer ring is typically only 3-6 months, requiring frequent replacement and increasing maintenance costs.

[0007] Third, there is the issue of grading effectiveness. Existing diversion hood structures are either too complex or too simple, lacking precise material stratification and reflux mechanisms. In some equipment, the bottom area of ​​the grading wheel becomes a useless or wasteful zone, and the lack of a reliable sealing structure allows unqualified coarse particles to leak into the finished product, making it difficult to guarantee grading accuracy. In actual production, the proportion of unqualified particles in the finished product can reach 15-20%, affecting product quality.

[0008] Fourth, energy consumption and noise issues. Existing equipment suffers from high energy consumption due to unreasonable airflow organization and suboptimal material circulation paths. Simultaneously, the impact of high-speed rotating parts with materials generates significant noise, creating a harsh working environment.

[0009] Therefore, there is a need for a new type of pulverizer that can efficiently crush fibrous dry materials, has a reasonable airflow organization, accurate classification, low energy consumption, and low wear. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide a centrifugal biting pulverizer that effectively solves the problems of low efficiency, rapid wear and inaccurate grading of existing pulverizers when processing fibrous dry materials by combining centrifugal force, biting force, cyclone guidance and a precise material classification system.

[0011] Technical solution: A centrifugal interlocking pulverizer, characterized in that it includes: a shell;

[0012] An interlocking turntable is disposed within the housing and includes a main turntable and a gear ring. The edge of the main turntable is provided with a plurality of main turntable teeth, and the inner side of the gear ring is provided with a plurality of gear ring teeth. The main turntable teeth and the gear ring teeth interlock with each other to form an interlocking gap.

[0013] A cyclone guide plate is disposed above the interlocking turntable. The cyclone guide plate is provided with several arc-shaped guide strips, which are used to guide the material to the interlocking gap by using centrifugal force.

[0014] The flow divider includes an outer ring, a middle ring, and an inner ring that are nested together. A first annular channel is formed between the outer ring and the middle ring, and a second annular channel is formed between the middle ring and the inner ring. A plurality of arc-shaped baffles are provided in the first annular channel.

[0015] A classifying wheel is positioned above the flow divider and engages with the inner ring. The classifying wheel drives the airflow to form a guiding airflow within the second annular channel, which is used to guide unqualified materials back to the interlocking gap for further crushing.

[0016] A central shaft drive mechanism is located in the middle of the housing and includes a drive motor, a first central shaft, and a second central shaft. The drive motor drives the interlocking turntable to rotate through the first central shaft and drives the distributor to rotate through the second central shaft.

[0017] Furthermore, the tooth shape of both the main turntable tooth and the gear ring tooth is trapezoidal or sawtooth, and the meshing gap between the main turntable tooth and the gear ring tooth is 0.5-3mm.

[0018] Furthermore, the arc-shaped guide strip extends outward from the center of the main turntable, and the radius of curvature of the arc-shaped guide strip is 1.2-1.5 times the radius of the main turntable.

[0019] Furthermore, the height difference between the arc-shaped guide strip and the main body of the cyclone guide plate is 8-15mm, preferably 10mm; the ratio of the length of the arc-shaped guide strip to the bottom diameter of the outer ring of the diverter is 1.8:1 to 2.2:1, preferably 2:1.

[0020] Furthermore, the grading wheel includes a grading disc and several grading blades. The upper end of the grading blades is provided with a flutter edge, which extends outward and forms a gap fit of 0.5-2mm with the lower end face of the upper cover of the housing.

[0021] Furthermore, a pneumatic sealing zone is provided between the grading wheel and the upper cover. Compressed air is introduced into the gap through a compressed air source to form an air curtain seal, preventing material from leaking directly through the gap.

[0022] Furthermore, the arc-shaped baffle plate includes:

[0023] Cyclone guide plates are disposed between the outer ring and the middle ring, and are arc-shaped. There are several cyclone guide plates, with their two ends connected to the outer ring and the middle ring respectively. A cyclone channel is formed between two adjacent cyclone guide plates.

[0024] A baffle plate is disposed between adjacent cyclone guide plates, the baffle plate protruding in the bending direction of the cyclone guide plates, for guiding coarse particles to fall back.

[0025] Furthermore, the baffle plate is arc-shaped or zigzag-shaped, and the protrusion height of the baffle plate is 20-50mm.

[0026] Furthermore, the number of cyclone guide plates is three to six, preferably four, and the cyclone guide plates are centrally symmetrically distributed around the axis of the inner ring.

[0027] Furthermore, the height of the cyclone guide plate gradually decreases along the direction from the inner ring to the outer ring, with a decreasing gradient of 5-15 degrees.

[0028] Furthermore, the top of the outer ring is provided with a feed inlet, the top of the inner ring is provided with a discharge guide plate inclined towards the axis of the inner ring, with an inclination angle of 30-60 degrees; the bottom of the outer ring is provided with a return guide plate inclined radially outward along the outer ring, with an inclination angle of 40-70 degrees.

[0029] Furthermore, the diameter of the intermediate ring is 0.6-0.8 times the diameter of the outer ring, and the diameter of the inner ring is 0.3-0.5 times the diameter of the outer ring.

[0030] Furthermore, the drive motor is a dual-output shaft motor, or the drive motor drives the first central shaft and the second central shaft respectively through a transfer case, wherein the speed of the first central shaft is 2000-4000 rpm and the speed of the second central shaft is 1500-3000 rpm.

[0031] Furthermore, a discharge port is provided at the bottom of the shell, and a collection device is connected to the discharge port.

[0032] Furthermore, the interlocking turntable, the flow divider, and the grading wheel are made of wear-resistant alloy steel or tungsten carbide coated steel.

[0033] Beneficial effects:

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] First, it features highly efficient crushing and enhanced interlocking. The interlocking teeth of the main disc and the gear ring of the interlocking rotary disc create a 0.5-3mm interlocking gap, generating strong shearing and crushing forces on fibrous materials. The arc-shaped guide bar utilizes centrifugal force to precisely guide the material into the interlocking gap, ensuring thorough crushing within the interlocking zone. Experimental data shows that compared to traditional planar rotary disc crushers, this invention improves the crushing efficiency of fibrous materials by 35-45% and increases the throughput by over 30%.

[0036] Secondly, a stable and efficient cyclone guiding system. Replacing the traditional straight connecting plate with an arc-shaped cyclone guide plate more efficiently transforms the airflow driven by the classifier wheel into a stable lift cyclone. The height difference (8-15mm) and length ratio (1.8-2.2:1) of the arc-shaped guide strips are optimized to enhance the centrifugal guiding effect of the material. The stability of the cyclone flow field is improved by 40%, and the residence time of the material in the crushing chamber is shortened by 25%, avoiding disordered material movement and energy waste.

[0037] Third, a precise cyclone-resistant reflux classification system. The baffle plate has a structure that bulges towards the direction of the cyclone's curvature, forming a reverse convex curved surface. When the material is lifted by the cyclone and impacts the baffle plate, coarse particles with greater momentum (particle size greater than 150μm) dissipate their kinetic energy rapidly after impact due to their high inertia, and are precisely "swirled" and guided back to the interlocking zone for further crushing; while fine particles with less momentum (particle size less than 150μm) can bypass the baffle plate and enter the classifying wheel through the second annular channel. Actual measurement data shows that the classification accuracy is improved to over 90%, and the proportion of unqualified particles in the finished product is reduced to less than 5%, which is 60% higher than that of traditional flow dividers.

[0038] Fourth, it significantly reduces wear and energy consumption. The optimized cyclone flow field and curved surface structure effectively suppress the generation of local eddies, reducing the disordered impact of materials on the inner wall of the outer ring. The height of the cyclone guide plate gradually decreases from the inner ring to the outer ring (5-15 degree gradient), further optimizing the airflow gradient and reducing flow resistance. In practical applications, the service life of the inner wall of the outer ring is extended to 12-18 months, which is 2-3 times longer than that of traditional equipment; energy consumption per unit output is reduced by 20-25%, and noise is reduced by 8-12 decibels.

[0039] Fifth, reliable sealing and leak prevention. The pneumatic sealing zone between the grading wheel and the top cover uses compressed air to create an air curtain seal, effectively preventing substandard materials from leaking through the gaps. The precise fit between the flanging edge structure and the top cover (gap 0.5-2mm) further enhances the sealing effect. The measured leakage rate is less than 1%, ensuring the accuracy of grading and the stability of product quality.

[0040] Sixth, the structure is simple and maintenance is convenient. The overall structure adopts a modular design, and the outer ring, middle ring, inner ring, cyclone guide plate, and baffle plate can all be independently disassembled and replaced. Key components are made of wear-resistant alloy steel or tungsten carbide coating, further improving service life. The equipment is easy to operate and maintain, making it suitable for large-scale production and widespread application. Daily maintenance time is reduced by 50%, and spare parts costs are reduced by 30%.

[0041] This invention comprehensively improves the efficiency, precision, and reliability of the pulverizer when processing fibrous dry materials through an innovative centrifugal interlocking pulverizing mechanism, a stable cyclone guiding system, a precise cyclone reflux classification system, and a reliable sealing structure. At the same time, it significantly reduces energy consumption, wear, and maintenance costs, demonstrating significant technological progress and economic value. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the centrifugal interlocking pulverizer of the present invention;

[0043] Figure 2 This is a schematic diagram of the interlocking turntable structure of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the flow divider of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of the first annular channel of the flow divider of the present invention;

[0046] Figure 5 This is a three-dimensional schematic diagram of the flow divider of the present invention from another angle;

[0047] Figure 6 This is a cross-sectional view of the baffle plate in another embodiment of the flow divider.

[0048] The annotations in the attached figures are explained as follows:

[0049] 1-Shell, 2-Interlocking turntable, 21-Main turntable, 22-Main turntable teeth, 23-Gear ring, 24-Gear ring teeth, 3-Cyclone guide plate, 31-Arc-shaped guide strip, 4-Diverter shroud, 41-Outer ring, 42-Intermediate ring, 43-Inner ring, 44-Cyclone guide plate, 45-Baffle plate, 46-Discharge guide plate, 47-Return guide plate, 48-Inlet, 5-Grading wheel, 51-Grading wheel disc, 52-Grading blade, 53-Flange, 6-Central shaft drive mechanism, 61-Drive motor, 62-First central shaft, 63-Second central shaft, 7-Top cover, 8-Inlet, 9-Outlet, 10-Air pressure sealing area, 11-First annular channel, 12-Second annular channel, 13-Interlocking gap. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0051] It should be noted that the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] Example 1

[0053] like Figure 1-6 As shown, a centrifugal interlocking pulverizer includes a shell 1, an interlocking turntable 2, a cyclone guide plate 3, a flow divider 4, a classifying wheel 5, and a central shaft drive mechanism 6.

[0054] The housing 1 has a cylindrical structure. A top cover 7 is provided on the top of the housing 1, which is connected to the housing 1 by bolts for easy disassembly and maintenance. A feed inlet 8 with a diameter of 150mm is provided on the side wall of the housing 1, and a feed pipe is connected to it. A discharge outlet 9 with a diameter of 200mm is provided at the bottom of the housing 1, and a collection device is connected to it.

[0055] The interlocking turntable 2 is located at the bottom center of the housing 1. For example... Figure 2As shown, the interlocking turntable 2 includes a main turntable 21 and a gear ring 23. The main turntable 21 has a disc-shaped structure and is made of wear-resistant alloy steel (hardness HRC 55-60). The edge of the main turntable 21 has 60 main turntable teeth 22 evenly distributed. The main turntable teeth 22 are trapezoidal teeth with a tooth height of 15mm, a tooth width of 8mm, and a tooth spacing of 10mm.

[0056] The gear ring 23 is a ring structure and is made of the same material as the main turntable 21. The gear ring 23 is fixed to the inner wall of the housing 1 by a support frame. There are 60 gear ring teeth 24 evenly distributed on the inner side of the gear ring 23. The tooth profile of the gear ring teeth 24 matches the teeth 22 of the main turntable, with a tooth height of 15mm and a tooth width of 8mm.

[0057] The main turntable teeth 22 and the gear ring teeth 24 mesh with each other, forming a meshing gap 13. The meshing gap 13 has a width of 1.5 mm and a length of 600 mm (along the circumferential direction). When the main turntable 21 rotates at high speed, the material is subjected to strong shearing force and crushing pressure within the meshing gap 13, achieving efficient crushing.

[0058] The cyclone guide plate 3 is positioned above the interlocking turntable 2 and is coaxially fixed with the main turntable 21. For example... Figure 2 As shown, the cyclone guide plate 3 has a disc-shaped structure. Eight arc-shaped guide strips 31 are provided on the upper surface of the cyclone guide plate 3, and the arc-shaped guide strips 31 are evenly distributed radially.

[0059] Each arc-shaped guide bar 31 has a height difference of 10mm relative to the main body of the cyclone guide plate 3. The arc-shaped guide bar 31 is arc-shaped, with the arc direction extending outward from the center of the main turntable 21, and the radius of curvature is 400mm (1.33 times the radius of the main turntable). The arc design of the arc-shaped guide bar 31 enables it to use centrifugal force to accurately guide the material to the interlocking gap 13 when the main turntable 21 rotates, thereby improving the crushing efficiency.

[0060] The flow divider 4 is positioned above the cyclone guide plate 3. For example... Figure 3-5 As shown, the flow divider 4 includes an outer ring 41, a middle ring 42, and an inner ring 43 that are nested together.

[0061] The outer ring 41 is a circular structure made of 304 stainless steel. A feed inlet 8 is located at the top of the outer ring 41, aligned with the feed inlet of the housing 1. A return guide plate 47 is located at the bottom of the outer ring 41. The return guide plate 47 is radially outward along the outer ring 41 at an angle of 55 degrees and a width of 50 mm, used to guide the falling coarse particles back into the interlocking gap 13.

[0062] The intermediate ring 42 is a circular ring structure and is made of the same material as the outer ring 41. A first annular channel 11 is formed between the intermediate ring 42 and the outer ring 41. The width of the first annular channel 11 is 80mm (the distance from the inner diameter of the outer ring to the outer diameter of the intermediate ring).

[0063] The inner ring 43 has a circular structure and is made of the same material as the outer ring 41. A discharge guide plate 46 is located at the top of the inner ring 43, inclined at a 45-degree angle towards the axis of the inner ring 43, and 40mm wide, to guide fine particles into the classifying wheel 5. A second annular channel 12 is formed between the intermediate ring 42 and the inner ring 43, with a width of 65mm (the distance from the inner diameter of the intermediate ring to the outer diameter of the inner ring).

[0064] Within the first annular channel 11, cyclone guide plates 44 and baffle plates 45 are provided. There are four cyclone guide plates 44, arranged in an arc shape, with each end connected to the outer ring 41 and the middle ring 42, respectively. Each cyclone guide plate 44 has a length of 280 mm (radial), a width of 150 mm (circumferential), and a thickness of 5 mm. The height of the cyclone guide plates 44 gradually decreases from the inner ring to the outer ring in a gradient of 10 degrees; that is, the height of the cyclone guide plate 44 at the connection to the middle ring 42 is 280 mm, and the height at the connection to the outer ring 41 is 230 mm. The four cyclone guide plates 44 are evenly distributed at 90-degree angles around the axis of the inner ring 43 (centrally symmetrical).

[0065] A baffle plate 45 is provided between two adjacent cyclone guide plates 44. The baffle plate 45 is arc-shaped and protrudes in the bending direction of the cyclone guide plate 44, with a protrusion height of 35mm. Each baffle plate 45 is 200mm long (radial), 120mm wide (circumferential), and 4mm thick. The convex curved surface of the baffle plate 45 can resist the cyclone-carried material. Coarse particles with greater momentum are guided back to the interlocking gap 13 after impacting the baffle plate 45, while fine particles with less momentum can bypass the baffle plate 45 and enter the second annular channel 12.

[0066] The grading wheel 5 is positioned above the flow divider 4, with a gap between it and the upper cover 7. For example... Figure 6 As shown, the grading wheel 5 includes a grading disc 51 and grading blades 52. The grading disc 51 has a disc-shaped structure with a diameter of 380 mm and a thickness of 10 mm, and is made of 304 stainless steel. Twelve grading blades 52 are evenly distributed along the edge of the grading disc 51, and the grading blades 52 are blade-shaped.

[0067] The upper end of the grading blade 52 is provided with a flange 53, which extends outward for a length of 15mm. The flange 53 forms a 1mm gap fit with the lower end face of the upper cover 7. The design of the flange 53 increases the contact area between the grading wheel 5 and the upper cover 7, improving the sealing effect.

[0068] A pneumatic sealing zone 10 is provided between the grading wheel 5 and the upper cover 7. Compressed air is introduced into the gap between the floating edge 53 and the upper cover 7 through a compressed air source (not shown). The pressure of the compressed air is 0.2-0.5MPa, forming an air curtain seal, which effectively prevents unqualified materials from leaking out of the gap.

[0069] The central shaft drive mechanism 6 is located in the middle of the housing 1. The central shaft drive mechanism 6 includes a drive motor 61, a first central shaft 62, and a second central shaft 63. The drive motor 61 is a dual-output shaft motor with a power of 55kW and a speed of 1500rpm. The drive motor 61 drives the first central shaft 62 and the second central shaft 63 respectively through a transfer case (not shown).

[0070] The first central shaft 62 is a hollow shaft, and it drives the interlocking turntable 2 to rotate via a key connection. The rotational speed of the first central shaft 62 is 3000 rpm, which means the rotational speed of the main turntable 21 is 3000 rpm.

[0071] The second central shaft 63 is a solid shaft that passes through the first central shaft 62 (i.e., the second central shaft 63 is located inside the hollow part of the first central shaft 62). It drives the flow divider 4 and the classifier wheel 5 to rotate via a key connection. The rotational speed of the second central shaft 63 is 2000 rpm, which means that the rotational speed of the flow divider 4 and the classifier wheel 5 is 2000 rpm.

[0072] Work process:

[0073] Material enters the housing 1 through the feed inlet 8 and falls into the first annular channel 11. At this time, the drive motor 61 drives the interlocking turntable 2 to rotate at a high speed of 3000 rpm through the first central shaft 62, and at the same time drives the diverter shroud 4 and the classifier wheel 5 to rotate at a speed of 2000 rpm through the second central shaft 63.

[0074] Under the action of the arc-shaped guide strips 31 of the cyclone guide plate 3, the material is guided by centrifugal force and precisely thrown into the biting gap 13. Within the biting gap 13, the material is subjected to strong shearing and grinding forces from the main turntable teeth 22 and the toothed ring teeth 24, achieving efficient crushing.

[0075] The crushed material, under the action of the airflow driven by the classifying wheel 5, enters the first annular channel 11 through the feed inlet 48 and rises, forming a stable cyclone. The material rises under the carry of the cyclone and impacts the baffle plate 45.

[0076] Coarse particles with high momentum (particle size greater than 150μm) are "spin-resistant" by the raised curved surface of the baffle plate 45 after impacting it due to their large inertia. Their kinetic energy is quickly dissipated and they are guided to fall downwards. After being guided by the return guide plate 47, the coarse particles fall back into the interlocking gap 13 for secondary crushing.

[0077] Fine particles with low momentum (particle size less than 150 μm) can bypass the baffle plate 45 and enter the second annular channel 12. The fine particles continue to rise in the second annular channel 12 and, guided by the discharge guide plate 46, enter the blade area of ​​the classifier wheel 5.

[0078] In the blade area of ​​the classifier wheel 5, fine particulate material is sorted by the classifier blades 52. Qualified ultrafine particulate material (particle size less than 100μm) passes through the classifier wheel 5 with the airflow and is discharged from the discharge pipe of the upper cover 7, entering the collection device. A small amount of unqualified particulate material is intercepted by the classifier blades 52 and falls back into the second annular channel 12 to continue the cycle.

[0079] Compressed air introduced into the air pressure sealing zone 10 forms an air curtain between the edge 53 and the top cover 7, effectively preventing unqualified materials from leaking out of the gap and ensuring grading accuracy.

[0080] Experimental data:

[0081] The centrifugal interlocking pulverizer of this embodiment was used to process corn stalks (moisture content 12%). The feed rate was 1000 kg / h, the main disc speed was 3000 rpm, and the grading wheel speed was 2000 rpm. The experimental results are as follows:

[0082] Crushing efficiency: More than 95% of the material particles are smaller than 150μm, of which 80% of the material particles are smaller than 100μm.

[0083] Processing capacity: The actual processing capacity is 1300 kg / h, which is 30% higher than the rated processing capacity.

[0084] Energy consumption: The energy consumption per unit output is 45 kWh / t, which is 25% lower than that of traditional crushers (60 kWh / t).

[0085] Grading accuracy: The proportion of unqualified particles (particle size greater than 150μm) in the finished product is 3.5%, and the grading accuracy reaches 96.5%.

[0086] Wear condition: After 500 hours of continuous operation, the wear depth of the inner wall of the outer ring is less than 0.5 mm, the wear height of the gear ring is less than 1 mm, and the expected service life is more than 12 months.

[0087] Noise: The noise level of the equipment during operation is 78 decibels, which is 12 decibels lower than that of a traditional crusher (90 decibels).

[0088] Example 2

[0089] The main difference between this embodiment and Embodiment 1 is the shape of the baffle plate and the number of cyclone guide plates.

[0090] The baffle plate 45 is zigzag-shaped rather than arc-shaped. The zigzag-shaped baffle plate 45 consists of two straight plates with an included angle of 120 degrees and a protrusion height of 30mm. The zigzag-shaped baffle plate 45 can also prevent material from rotating, but its manufacturing process is simpler and the cost is lower.

[0091] There are six cyclone guide plates 44, evenly distributed at 60-degree angles around the axis of the inner ring 43. Correspondingly, there are also six baffle plates 45. The increase in the number of cyclone guide plates 44 makes the cyclone flow field in the first annular channel 11 more compact and stable, further improving the material classification effect.

[0092] The other structures and parameters are the same as in Example 1.

[0093] Experimental data:

[0094] The centrifugal interlocking pulverizer of this embodiment was used to process wheat bran (moisture content 10%). The feed rate was 1200 kg / h, the main turntable speed was 3500 rpm, and the grading wheel speed was 2500 rpm. The experimental results are as follows:

[0095] Crushing efficiency: More than 96% of the material particles are smaller than 150μm, of which 82% of the material particles are smaller than 100μm.

[0096] Processing capacity: The actual processing capacity is 1500 kg / h, which is 25% higher than the rated processing capacity.

[0097] Energy consumption: The energy consumption per unit output is 42 kWh / t, which is 30% lower than that of traditional crushers.

[0098] Grading accuracy: The proportion of unqualified particles in the finished product is 2.8%, and the grading accuracy reaches 97.2%.

[0099] Wear condition: After 500 hours of continuous operation, the wear depth of the inner wall of the outer ring is less than 0.4 mm, the wear height of the gear ring is less than 0.8 mm, and the expected service life is more than 15 months.

[0100] Example 3

[0101] The main difference between this embodiment and Embodiment 1 lies in the width of the interlocking gap and the driving method.

[0102] The width of the interlocking gap 13 is 0.8 mm, which is smaller than that of Example 1 (1.5 mm). The smaller interlocking gap can generate stronger shearing force on the material, making it suitable for processing harder or longer fiber materials (such as rice husks, peanut shells, etc.).

[0103] The central shaft drive mechanism 6 employs two independent drive motors. The first drive motor drives the first central shaft 62 with a power of 37kW and a speed of 4000rpm. The second drive motor drives the second central shaft 63 with a power of 22kW and a speed of 2200rpm. This independent drive system allows the speeds of the main turntable 21 and the grading wheel 5 to be adjusted separately, adapting to the processing requirements of different materials.

[0104] The other structures and parameters are the same as in Example 1.

[0105] Experimental data:

[0106] The centrifugal interlocking pulverizer of this embodiment was used to process rice husks (moisture content 11%). The feed rate was 800 kg / h, the main turntable speed was 4000 rpm, and the grading wheel speed was 2200 rpm. The experimental results are as follows:

[0107] Crushing efficiency: More than 97% of the material particles are smaller than 150μm, of which 85% of the material particles are smaller than 100μm.

[0108] Processing capacity: The actual processing capacity is 1000 kg / h, which is 25% higher than the rated processing capacity.

[0109] Energy consumption: The energy consumption per unit output is 50 kWh / t, which is 17% lower than that of traditional crushers.

[0110] Grading accuracy: The proportion of unqualified particles in the finished product is 2.2%, and the grading accuracy reaches 97.8%.

[0111] Wear condition: After 500 hours of continuous operation, the wear depth of the inner wall of the outer ring is less than 0.6 mm, the wear height of the gear ring is less than 1.2 mm, and the expected service life is more than 10 months.

[0112] Comparative Example

[0113] To verify the technical effect of the present invention, a comparative experiment was conducted. The comparative example used a traditional hammer mill, with the following structure: 12 hammers (80mm in length) are mounted on a flat turntable (600mm in diameter) at a rotation speed of 3000rpm; the flow divider is a simple cylindrical shape without a cyclone guide plate or baffle plate; the classifying wheel is a common impeller without a pneumatic sealing zone.

[0114] A comparative study was conducted using a shredder to process corn stalks (moisture content 12%) at a feed rate of 1000 kg / h. The experimental results are as follows:

[0115] Crushing efficiency: 85% of the material particles are smaller than 150μm, of which 60% are smaller than 100μm.

[0116] Processing capacity: The actual processing capacity is 1000 kg / h.

[0117] Energy consumption: 60 kWh / t of energy consumption per unit of output.

[0118] Grading accuracy: The proportion of unqualified particles in the finished product is 18%, and the grading accuracy is only 82%.

[0119] Wear condition: After 500 hours of continuous operation, the wear depth of the inner wall of the outer ring reaches 3mm, the hammer blades are severely worn and need to be replaced, and the expected service life is only 4-6 months.

[0120] Noise: The noise level of the equipment during operation is 90 decibels.

[0121] The comparison results show that:

[0122] Compared to traditional pulverizers, the centrifugal interlocking pulverizer of this invention offers significant improvements in pulverizing efficiency, throughput, energy consumption, grading accuracy, wear, and noise. Its technological advantages are particularly evident when processing fibrous dry materials.

[0123] As can be seen from the above embodiments and comparative examples, the centrifugal interlocking pulverizer of the present invention achieves the technical effects of high-efficiency pulverization, precise classification, low energy consumption, and low wear through the innovative combination of interlocking turntable, cyclone guide plate, anti-swirl reflux diversion hood and air pressure sealed classifying wheel, which has significant technical progress and practical value.

[0124] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. For example, the tooth shape of the main turntable teeth and the gear ring teeth can be other forms, such as sawtooth shape, wave shape, etc.; the number, shape, and size of the arc-shaped guide strips can be adjusted according to specific needs; the number, shape, and layout of the cyclone guide plate and the baffle plate can be adjusted according to specific needs; the driving method can be other forms, such as belt drive, gear drive, etc.; the material can be selected according to the properties of the specific material, such as ceramic, polytetrafluoroethylene, etc.

Claims

1. A centrifugal interlocking pulverizer, characterized in that, Includes housing, interlocking turntable, flow divider, and grading wheel. An interlocking turntable is disposed within the housing and includes a main turntable and a gear ring. The edge of the main turntable is provided with a plurality of main turntable teeth, and the inner side of the gear ring is provided with a plurality of gear ring teeth. The main turntable teeth and the gear ring teeth interlock with each other to form an interlocking gap. A cyclone guide plate is disposed above the interlocking turntable. The cyclone guide plate is provided with several arc-shaped guide strips, which are used to guide the material to the interlocking gap by using centrifugal force. The flow divider includes an outer ring, a middle ring, and an inner ring that are nested together. A first annular channel is formed between the outer ring and the middle ring, and a second annular channel is formed between the middle ring and the inner ring. A plurality of arc-shaped baffles are provided in the first annular channel. A classifying wheel is positioned above the flow divider and engages with the inner ring. The classifying wheel drives the airflow to form a guiding airflow within the second annular channel, which is used to guide unqualified materials back to the interlocking gap for further crushing. A central shaft drive mechanism is located in the middle of the housing and includes a drive motor, a first central shaft, and a second central shaft. The drive motor drives the interlocking turntable to rotate through the first central shaft and drives the distributor to rotate through the second central shaft.

2. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The arc-shaped guide strip of the cyclone guide plate refracts outward from the center of the main turntable.

3. The centrifugal interlocking pulverizer according to claim 1, characterized in that: *The height difference between the arc-shaped guide strip and the main body of the cyclone guide plate is 8-15mm; the ratio of the length of the arc-shaped guide strip to the bottom diameter of the outer ring of the diverter is 1.8:1 to 2.2:

1.

4. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The grading wheel includes a grading disc and several grading blades. The upper end of the grading blades is provided with a flared edge, which extends outward and forms a 0.5-2mm gap fit with the lower end face of the upper cover of the housing.

5. The centrifugal interlocking pulverizer according to claim 4, characterized in that: A pneumatic sealing zone is provided between the grader wheel and the upper cover. Compressed air is introduced into the gap through a compressed air source to form an air curtain seal.

6. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The arc-shaped baffle plate includes: Cyclone guide plates are disposed between the outer ring and the middle ring, and are arc-shaped. There are several cyclone guide plates, with their two ends connected to the outer ring and the middle ring respectively. A cyclone channel is formed between two adjacent cyclone guide plates. A baffle plate is disposed between adjacent cyclone guide plates, and the baffle plate protrudes in the bending direction of the cyclone guide plate.

7. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The baffle plate is arc-shaped or zigzag-shaped, and the protrusion height of the baffle plate is 20-50mm.

8. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The cyclone guide plates are configured in a manner of at least three, and are centrally symmetrically distributed about the axis of the inner ring.

9. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The height of the cyclone guide plate is configured to gradually decrease along the direction from the inner ring to the outer ring.

10. The centrifugal interlocking pulverizer according to claim 1, characterized in that: The outer ring is provided with a feed inlet, the top of the inner ring is also provided with a discharge guide plate that is inclined toward the axis of the inner ring, and the bottom of the outer ring is also provided with a return guide plate that is inclined outward along the radial direction of the outer ring.

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