Ultrafine pulverizing cutter head suitable for high fiber straw raw material

Abstract

This utility model discloses an ultrafine grinding disc suitable for high-fiber straw raw materials. The disc includes a disc rotor and a disc stator rotatably connected to the disc rotor. The disc rotor is circumferentially provided with multiple first and second gear teeth for grinding raw materials. At least two second gear teeth are located between two adjacent first gear teeth. The first gear teeth extend along the axial direction of the disc rotor and have guide portions. A grinding space is provided between the disc stator and the disc rotor. A discharge port for discharging the ground raw materials is provided on the outer side of the disc stator. The discharge port is connected to a grading mechanism for screening the particle size of the raw materials. This technical solution can achieve efficient grinding of high-fiber straw raw materials and maintain the uniformity of the raw material particle size.

Description

Technical Field

[0001] This invention relates to the field of raw material crushing technology in the biodegradable new materials industry, specifically to an ultrafine crushing disc suitable for high-fiber straw raw materials. Background Technology

[0002] High-fiber straw raw materials, such as relatively clean straw that does not contain plant roots or stems, and lignocellulose, can be processed using ultrafine grinding technology to release active ingredients and optimize their physicochemical properties. This is a core technological path for developing functional products and achieving efficient resource utilization. However, traditional grinding equipment for achieving ultrafine grinding technology suffers from the following technical problems: 1. Low crushing efficiency: Traditional blade crushers rely on a single impact force, which is insufficient for shearing high-fiber materials. This can easily cause materials to entangle around the blade head or float, making it difficult to further refine them.

[0003] 2. Poor particle size control: The particle size distribution of the pulverized material is wide, which makes it difficult to meet the requirements of fine processing (such as the requirement for 10-micron ultrafine powder in the field of biodegradable new materials).

[0004] 3. Short tool life: High-fiber materials are prone to jamming the tool head, leading to tool overheating, accelerated wear, and high maintenance costs.

[0005] Therefore, to address the above technical issues, it is necessary to develop an ultra-micro pulverizing disc that combines high-efficiency shearing, low energy consumption, and long lifespan, to achieve pulverization of high-fiber straw raw materials to below 10 micrometers and increase equipment output. Utility Model Content

[0006] To address the shortcomings of the existing technology, this invention provides an ultrafine grinding disc suitable for high-fiber straw materials. It features a double-layer toothed disc and a multi-stage grinding structure, achieving high efficiency and uniform particle size in grinding high-fiber straw materials.

[0007] To address the aforementioned problems, this utility model provides an ultrafine pulverizing disc, comprising a disc rotor and a disc stator rotatably connected to the disc rotor. The disc rotor is circumferentially provided with a plurality of first and second gear teeth for pulverizing raw materials, with at least two second gear teeth located between two adjacent first gear teeth. The first gear teeth extend along the axial direction of the disc rotor and have guide portions. A pulverizing space is provided between the disc stator and the disc rotor. A discharge port for discharging pulverized raw materials is provided on the outer side of the disc stator, and the discharge port is connected to a grading mechanism for screening the particle size of the raw materials.

[0008] Preferably, the second gear tooth is circumferentially mounted on the side end face of the cutter disc rotor, and the first gear tooth is circumferentially mounted on the axial end face of the cutter disc rotor.

[0009] Preferably, the stator end face of the cutter head has a groove axially inwardly formed, and the cutter head rotor is coaxially installed in the groove.

[0010] Preferably, the inner wall of the groove is uniformly provided with a plurality of sawtooth grooves for crushing raw materials, and the bottom of the groove is provided with a plurality of third gear teeth.

[0011] Preferably, the first gear tooth, the second gear tooth, and the third gear tooth are made of high wear-resistant tungsten steel, and the top and sides of the first gear tooth, the second gear tooth, and the third gear tooth are provided with helical tooth structures.

[0012] Preferably, the crushing space includes a primary crushing space and a secondary crushing space. The primary crushing space is located between the first gear tooth and the sawtooth groove, and the secondary crushing space is located between the second gear tooth, the third gear tooth and the sawtooth groove.

[0013] Beneficial effects: 1. Compared to existing technologies, this technical solution significantly improves crushing efficiency through a multi-stage crushing process using multi-layer gear teeth: the production capacity is increased by more than 50% compared to traditional equipment, and most materials can be quickly crushed to the qualified particle size, avoiding the need for repeated grading and re-crushing. Unit energy consumption is reduced to 0.05-0.08 kWh / kg; 2. More precise particle size control: The output particle size is ≤10 micrometers, and some materials can even reach the nanometer level; 3. Wide range of applications: It can process relatively clean high-fiber materials, such as straw and wood fiber that do not contain plant roots and stems; 4. Extended tool life: After wear-resistant treatment, the tool disc's life can be extended to more than 2,000 hours. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure described in this embodiment; Figure 2 This is a front view of the cutterhead rotor described in this embodiment; Figure 3 This is a partially enlarged view of the helical tooth structure on the first gear tooth of the cutter disc rotor described in this embodiment; Figure 4 This is a front view of the cutter head stator described in this embodiment; Figure 5 This is a cross-sectional view of the cutter head described in this embodiment.

[0015] In the diagram, 1 is the cutter head; 11 is the cutter head rotor; 111 is the first gear tooth; 112 is the second gear tooth; 12 is the cutter head stator; 121 is the groove; 122 is the third gear tooth; 123 is the discharge port; 124 is the serrated groove; 13 is the crushing space; 131 is the primary crushing space; 132 is the secondary crushing space; and 14 is the helical tooth. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0017] Combination Figure 1 This embodiment provides an ultrafine pulverizing head. The cutter disc 1 includes a cutter disc rotor 11 and a cutter disc stator 12 rotatably connected to the cutter disc rotor 11. The cutter disc rotor 11 is circumferentially provided with a plurality of first gear teeth 111 and second gear teeth 112 for pulverizing raw materials. At least two second gear teeth 112 are located between two adjacent first gear teeth 111. The first gear teeth 111 extend along the axial direction of the cutter disc rotor 11 and have a guide portion. A pulverizing space 13 is provided between the cutter disc stator 12 and the cutter disc rotor 11. A discharge port 123 for discharging pulverized raw materials is provided on the outside of the cutter disc stator 12. The discharge port 123 is connected to a grading mechanism for screening the particle size of the raw materials.

[0018] It should be noted that the cutter disc rotor 11 rotates at high speed with a rotor linear velocity of 120-135 m / s to ensure high shearing efficiency; the cutter disc stator 12 remains stationary, and the straw raw material moves radially outward along the cutter disc rotor 11 under the action of centrifugal force and airflow, and is pulverized multiple times through the pulverizing space 13, and finally discharged from the gap of the outermost toothed disc of the cutter disc stator 12; the pulverized small particles enter the grading mechanism through the rising airflow, qualified particles are screened out, and unqualified particles are returned to the pulverizing chamber for pulverization again, realizing closed-loop high-efficiency pulverization.

[0019] Grass and wood particles larger than 10μm will be screened and returned to the crushing space 13 for cyclic crushing. The grading mechanism can be a common air classifier on the market, which has the characteristics of ultra-micro grading and ultra-high efficiency.

[0020] Combination Figure 2 It can be seen that the second gear tooth 112 is circumferentially mounted on the side end face of the cutter head rotor 11, and the first gear tooth 111 is circumferentially mounted on the axial end face of the cutter head rotor 11.

[0021] It should be noted that the first gear 111 and the second gear 112 are connected and fixed to the cutter head rotor 11 by welding.

[0022] Combination Figure 3 and 4 It can be seen that the end face of the cutter head stator 12 has a groove 121 axially inward, and the cutter head rotor 11 is coaxially installed in the groove 121.

[0023] The inner wall of the groove 121 is evenly provided with a number of sawtooth grooves 124 for crushing raw materials, and the bottom of the groove 121 is provided with a number of third wheel teeth 122.

[0024] The first gear tooth 111, the second gear tooth 112 and the third gear tooth 122 are made of high wear-resistant tungsten steel, and the top and sides of the first gear tooth 111, the second gear tooth 112 and the third gear tooth 122 are provided with helical tooth 14 structures.

[0025] It should be noted that the inclined angle of the inclined teeth 14 in the structure of the inclined teeth 14 is 15-30°, and the top and side of the cutter head 2 are provided with 5 inclined teeth 14, which can effectively enhance the shearing force.

[0026] Combination Figure 5 It can be seen that the crushing space 13 includes a primary crushing space 131 and a secondary crushing space 132. The primary crushing space 131 is located between the first gear tooth 111 and the sawtooth groove 124, and the secondary crushing space 132 is located between the second gear tooth 112, the third gear tooth 122 and the sawtooth groove 124.

[0027] It should be noted that the crushing space 13 is equipped with a water-cooling jacket to reduce the temperature of the cutting tools and extend their service life.

[0028] Working principle: The cutter disc 1 includes a cutter disc rotor 11 and a cutter disc stator 12 rotatably connected to the cutter disc rotor 11. The cutter disc rotor 11 is circumferentially provided with a plurality of first gear teeth 111 and second gear teeth 112 for crushing raw materials. At least two second gear teeth 112 are located between two adjacent first gear teeth 111. The first gear teeth 111 extend along the axial direction of the cutter disc rotor 11 and have a guide portion. A crushing space 13 is provided between the cutter disc stator 12 and the cutter disc rotor 11. A discharge port 123 for discharging crushed raw materials is provided on the outside of the cutter disc stator 12. The discharge port 123 is connected to a grading mechanism for screening the particle size of the raw materials. The cutter disc rotor 11 rotates at high speed, while the cutter disc stator 12 remains stationary. The cutter disc 1 is horizontally positioned, and the raw material is vertically fed in from above. First, the raw material contacts the first tooth 111 on the cutter disc rotor 11 and undergoes initial crushing with the serrated groove 121 on the inner wall of the cutter disc stator 12. Then, it enters the secondary crushing space, where the initially crushed material is repeatedly ground by the second tooth 112, the third tooth 122, and the serrated groove 121 on the inner wall of the cutter disc stator 12. Under the combined action of centrifugal force and airflow, the raw material moves radially outward along the rotor and is finally discharged from the outermost tooth gap of the cutter disc stator 12. The crushed small particles are carried by the rising airflow into the grading mechanism, where qualified particles are screened out, while unqualified particles are sent back to the crushing chamber for further crushing, thus achieving closed-loop high-efficiency crushing.

[0029] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An ultrafine grinding disc suitable for high-fiber straw raw materials, characterized in that, The cutter disc includes a cutter disc rotor and a cutter disc stator rotatably connected to the cutter disc rotor. The cutter disc rotor is circumferentially provided with a plurality of first gear teeth and second gear teeth for crushing raw materials. At least two second gear teeth are located between two adjacent first gear teeth. The first gear teeth extend along the axial direction of the cutter disc rotor and have guide portions. A crushing space is provided between the cutter disc stator and the cutter disc rotor. A discharge port for discharging crushed raw materials is provided on the outer side of the cutter disc stator. The discharge port is connected to a grading mechanism for screening the particle size of the raw materials.

2. The ultrafine pulverizing disc for high-fiber straw raw materials according to claim 1, characterized in that, The second gear tooth is circumferentially mounted on the side end face of the cutter disc rotor, and the first gear tooth is circumferentially mounted on the axial end face of the cutter disc rotor.

3. The ultrafine pulverizing disc for high-fiber straw raw materials according to claim 1, characterized in that, The stator end face of the cutter head has a groove axially inward, and the cutter head rotor is coaxially installed in the groove.

4. The ultrafine pulverizing disc for high-fiber straw raw materials according to claim 3, characterized in that, The inner wall of the groove is uniformly provided with several sawtooth grooves for crushing raw materials, and the bottom of the groove is provided with multiple third wheel teeth.

5. The ultrafine pulverizing disc for high-fiber straw raw materials according to claim 4, characterized in that, The first tooth, the second tooth, and the third tooth are made of high wear-resistant tungsten steel, and the top and sides of the first tooth, the second tooth, and the third tooth are provided with helical tooth structures.

6. The ultrafine pulverizing disc for high-fiber straw raw materials according to claim 5, characterized in that, The crushing space includes a primary crushing space and a secondary crushing space. The primary crushing space is located between the first gear tooth and the sawtooth groove, and the secondary crushing space is located between the second gear tooth, the third gear tooth and the sawtooth groove.

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