Nanoscale crushing and grinding machine

Abstract

The invention discloses a nanoscale crushing and grinding machine, and relates to the technical field of raw material powder particle grinding in the chemical industry, the battery industry, the bioengineering industry and the like. The invention solves the problems that the existing crushing and grinding equipment can only reach the micron scale but cannot reach the nano scale, the particle size of a material finished product is difficult to accurately control, and the over-grinding phenomenon, the reagglomeration phenomenon and the empty grinding phenomenon are easy to occur. A stirring paddle is arranged in a grinding chamber of the nanoscale smashing and grinding machine, the upper portion of the stirring paddle is rotationally connected with a top cover, a stirring paddle rotation driving assembly is connected with the top of the stirring paddle, an inner wall guide plate is arranged in the grinding chamber and is of a hollow structure, and the top end of the inner wall guide plate is installed on the lower surface of the top cover; the upper surface of the top cover is provided with a discharging port and a feeding port communicated with the hollow pipeline in the inner wall flow guide plate, and the feeding port serves as a negative pressure connector for discharging and exhausting. The device is used for coarse grinding, fine grinding and superfine grinding of raw material powder particles and separation of products after grinding of subsequent product materials.

Description

Technical Field

[0001] The invention relates to the technical field of raw material powder particle grinding in the chemical industry, battery industry, bioengineering industry and the like, and in particular to a nanometer-level crushing and grinding machine. Background Art

[0002] A crushing and grinding machine is one of the devices used to crush and grind raw material powder particles. The device can grind raw materials into fine particles. With the advancement of science and the rapid development of the economy, the raw material powder particles used in the chemical industry, battery industry, bioengineering industry, etc. need to reach the nanometer level (0.1μm~0.9μm). However, the existing crushing and grinding equipment can generally only crush and grind the raw material powder particles to the micrometer level, and cannot reach the nanometer level. Moreover, it is difficult for the existing crushing and grinding equipment to accurately control the particle size of the finished material, and it is easy to have over-grinding, re-agglomeration and empty grinding phenomena. The over-grinding phenomenon refers to the material reaching the required set diameter, but not being discharged in time, and then continuing to grind, so that the material particles are smaller than the required setting; the re-agglomeration phenomenon refers to the small particles of the material constantly colliding in the grinding chamber, connecting together, and colliding and combining into large particles. In addition, over-grinding and agglomeration will also increase the energy consumption of the equipment. The empty grinding phenomenon refers to the fact that due to the insufficient proportion of materials in the grinding chamber, the number of abrasions between the grinding medium and the material accounts for a small proportion, and the number of collisions between the grinding medium itself accounts for a large proportion. Therefore, according to this market demand, it is urgent to develop a nano-level crushing and grinding equipment. Summary of the invention

[0003] The purpose of the present invention is to solve the problems that the existing crushing and grinding equipment can only reach the micron level but not the nanometer level, and it is difficult to accurately control the particle size of the finished material, and it is easy to have over-grinding, re-agglomeration and empty grinding phenomena, and thus provide a nanometer-level crushing and grinding machine.

[0004] The technical solution of the present invention is:

[0005] A nano-scale pulverizing and grinding machine, the nano-scale pulverizing and grinding machine comprises a grinding chamber, an outer pot body, a frame, a grinding chamber rotary drive assembly and a top cover, the outer pot body is mounted on the frame, a coaxially arranged grinding chamber is arranged inside the outer pot body, the bottom of the grinding chamber is rotatably connected to the outer pot body, the grinding chamber rotary drive assembly is mounted on the bottom of the outer pot body, the grinding chamber rotary drive assembly is connected to the bottom of the grinding chamber to drive the grinding chamber to rotate, a top cover is mounted on the upper opening of the outer pot body, the nano-scale pulverizing and grinding machine also comprises a stirring paddle, a stirring paddle rotary drive assembly and an inner wall guide plate, the grinding chamber The grinding chamber is filled with spherical grinding media, and a stirring paddle is arranged inside the grinding chamber. The upper part of the stirring paddle is rotatably connected to the top cover, and the stirring paddle rotary drive assembly is installed on the upper part of the top cover. The stirring paddle rotary drive assembly is connected to the top of the stirring paddle to drive the stirring paddle to rotate. An inner wall guide plate arranged parallel to the inner wall of the grinding chamber is also provided inside the grinding chamber. The inner wall guide plate is a hollow structure, and the top end of the inner wall guide plate is installed on the lower surface of the top cover. A discharge port and a feed port connected to the hollow pipe inside the inner wall guide plate are opened on the upper surface of the top cover as a negative pressure interface for discharge and exhaust.

[0006] Furthermore, the stirring paddle is arranged eccentrically with the grinding chamber.

[0007] Furthermore, the stirring paddle includes a core shaft and a plurality of cylindrical rods, and a plurality of groups of stirring units are arranged on the side of the core shaft from top to bottom along the length direction of the core shaft. Each group of stirring units includes a plurality of cylindrical rods evenly arranged along the circumferential direction, and the cylindrical rods are arranged radially along the core shaft.

[0008] Furthermore, the agitator rotation drive assembly includes an agitator fixed support and an agitator drive motor. The agitator fixed support is installed on the upper surface of the top cover, the agitator drive motor is installed on the agitator fixed support, and the agitator fixed support shaft is connected to the top of the core shaft through a coupling.

[0009] Furthermore, the cross-section of the inner wall guide plate is composed of a right-angled trapezoid and a semicircle. A rectangular through hole is opened on the lower bottom plate of the right-angled trapezoidal part of the inner wall guide plate. The rectangular through hole runs through the upper and lower end surfaces of the lower bottom plate of the right-angled trapezoidal part. The semicircular part of the inner wall guide plate is arranged at the rectangular through hole of the lower bottom plate. The sharp corner of the right-angled trapezoidal part faces the inner wall of the grinding chamber, and the distance between the sharp corner and the inner wall of the grinding chamber is 2mm to 3mm.

[0010] Furthermore, the distance between the lower end surface of the inner wall guide plate and the bottom surface of the grinding chamber is 8 mm to 12 mm.

[0011] Furthermore, the grinding chamber rotation drive assembly includes a grinding chamber rotation reduction motor, a grinding chamber rotation transmission mechanism, a hollow transmission shaft, a grinding chamber seat sleeve, an outer pot seat sleeve, and two support bearings. A pot body installation through-hole is provided at the center of the bottom of the outer pot body. An outer pot seat sleeve arranged coaxially is provided below the outer pot body. The top end of the outer pot seat sleeve is fixedly connected to the lower surface of the outer pot body. A hollow transmission shaft arranged coaxially is provided inside the outer pot seat sleeve. The upper and lower ends of the outer side surface of the hollow transmission shaft are respectively rotationally connected to the upper and lower ends of the inner side surface of the outer pot seat sleeve through two support bearings. A grinding chamber seat sleeve arranged coaxially is provided below the grinding chamber. The top end of the grinding chamber seat sleeve is fixedly connected to the lower surface of the grinding chamber. A seat sleeve flange integrally formed is provided at the bottom of the grinding chamber seat sleeve. A transmission shaft flange integrally formed is provided at the top end of the hollow transmission shaft. The transmission shaft flange is connected to the seat sleeve flange through a plurality of connecting elements. A vertically arranged grinding chamber rotation reduction motor is provided on the side of the outer pot seat sleeve. The housing of the grinding chamber rotation reduction motor is fixedly connected to the side surface of the outer pot seat sleeve. A seat sleeve shaft hole is radially provided on the side surface of the outer pot seat sleeve. The rotation shaft of the grinding chamber rotation reduction motor passes through the seat sleeve shaft hole and extends into the inside of the outer pot seat sleeve. The rotation shaft of the grinding chamber rotation reduction motor is connected to the hollow transmission shaft through the grinding chamber rotation transmission mechanism.

[0012] Furthermore, the grinding chamber rotation transmission mechanism includes a driving bevel gear and a driven bevel gear. Two gear shaft holes respectively matching the rotation shaft of the grinding chamber rotation reduction motor and the hollow transmission shaft are machined at the centers of the driving bevel gear and the driven bevel gear. The driving bevel gear is installed on the rotation shaft of the grinding chamber rotation reduction motor through a flat key. The driven bevel gear is installed on the hollow transmission shaft through a flat key. The driven bevel gear meshes with the driving bevel gear.

[0013] Furthermore, the nano-level pulverizing and grinding machine further includes a cover body flipping assembly. The cover body flipping assembly includes a flipping motor bracket, a cover body flipping reduction motor, and a cover body support arm. A flipping motor bracket is provided on the side of the top cover. The flipping motor bracket is installed on the upper part of the side wall of the outer pot body. The housing of the cover body flipping reduction motor is installed on the flipping motor bracket. A support arm shaft hole is machined at one end of the cover body support arm. The rotation shaft of the cover body flipping reduction motor is connected to the support arm shaft hole through a flat key. A rectangular flange integrally formed is provided at the other end of the cover body support arm. The rectangular flange is connected to the top cover through a plurality of connecting elements.

[0014] Furthermore, the nano-level pulverizing and grinding machine further includes a pot body pitching assembly. The pot body pitching assembly includes a pitching motor bracket, a pot body pitching reduction motor, a pot body driving rotation shaft, and a pot body driven rotation shaft. The frame is a U-shaped frame. The outer pot body is located between the two wing plates of the U-shaped frame. The left and right side walls of the outer pot body are respectively rotationally connected to the two wing plates of the U-shaped frame through the pot body driving rotation shaft and the pot body driven rotation shaft. A pitching motor bracket is provided on the side of the pitching motor bracket. The pitching motor bracket is installed on the pitching motor bracket. The housing of the pot body pitching reduction motor is installed on the pitching motor bracket. The rotation shaft of the pot body pitching reduction motor is connected to the pot body driving rotation shaft through a coupling.

[0015] Compared with the prior art, the present invention has the following effects:

[0016] 1. The nano-scale crushing and grinding machine of the present invention can realize the coarse grinding, fine grinding and ultra-fine grinding of raw material powder particles. The present invention adopts the combined action of the gravity of the raw material and the air fluidization to realize the feeding. In the grinding chamber, the energy input by the stirring paddle and the action of the spherical grinding medium generate impact force and friction force to effectively grind the raw material, which can make the raw material powder particles after crushing and grinding reach the nanometer level (0.1μm~0.9μm).

[0017] 2. The nano-scale crushing and grinding machine of the present invention can effectively control the particle size of the finished material, reducing the phenomenon of over-grinding, re-agglomeration and empty grinding. The equipment of the present invention is a continuous production equipment. The raw material and air enter the feed port. The raw material is fully ground in the grinding chamber. When the size diameter is less than the set value, the material is taken out from the discharge port by the swaying force of the air. The theoretical basis is that the material particles fall downward under the influence of gravity, and the material and the spherical grinding medium are thrown by the stirring paddle. In the air, the spherical grinding medium fully collides and abrades with the material and the inner wall of the grinding chamber, and the material particles continue to become smaller. As the particles become smaller, the gravity on the material is also proportionally reduced until the gravity is less than the swaying force of the air, and the material will be taken out with the air. Because the grinding chamber is full of air flow, no matter where in the grinding chamber, as long as small particles of the set diameter are generated, they will be taken out of the grinding chamber by the air to achieve effective discharge. This method effectively controls the particle size of the finished material, reduces the phenomenon of over-grinding, re-agglomeration and empty grinding.

[0018] 3. The nano-scale crushing and grinding machine of the present invention can effectively reduce energy consumption. Since over-grinding and re-agglomeration phenomena will also increase the energy consumption of the equipment, the present equipment also effectively reduces energy loss. By discharging the material, the material is continuously fed through the feed port to ensure that the weight of the material in the grinding chamber remains unchanged, reducing the phenomenon of empty grinding, and also effectively reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the nano-scale pulverizing and grinding machine of the present invention;

[0020] Figure 2 It is a side view of the nano-scale pulverizing and grinding machine of the present invention

[0021] Figure 3 is a top view of the nano-scale pulverizing and grinding machine of the present invention;

[0022] Figure 4 is an axonometric view of the nano-scale pulverizing and grinding machine of the present invention;

[0023] Figure 5 It is a cross-sectional view of the inner wall guide plate in the nano-scale pulverizing and grinding machine of the present invention.

[0024] In the figure: 1, grinding chamber; 2, outer pot body; 3, frame; 4, grinding chamber rotary drive assembly; 401, grinding chamber rotary reduction motor; 402, hollow transmission shaft; 403, grinding chamber seat sleeve; 404, outer pot seat sleeve; 405, support bearing; 406, active bevel gear; 407, driven bevel gear; 5, top cover; 6, stirring paddle; 601, mandrel; 602, cylindrical rod; 7, stirring paddle rotary drive assembly; 701, stirring paddle fixed support; 702, stirring paddle drive motor; 8, inner wall Guide plate; straight 801, angular trapezoidal part; 802, semicircular part; 803, sharp corner; 9, cover flip assembly; 901, flip motor bracket; 902, cover flip reduction motor; 903, cover support arm; 10, pot body pitch assembly; 1001, pitch motor bracket; 1002, pot body pitch reduction motor; 1003, pot body active shaft; 1004, pot body driven shaft; 100, discharge port; 200, feed port; 300, raw materials; 400, finished product; 500, fluidizing air. DETAILED DESCRIPTION

[0025] Specific implementation method 1: Combination Figures 1 to 5 The present embodiment is described. A nano-scale pulverizing and grinding machine of the present embodiment comprises a grinding chamber 1, an outer pot body 2, a frame 3, a grinding chamber rotary drive assembly 4 and a top cover 5. The outer pot body 2 is mounted on the frame 3. A coaxially arranged grinding chamber 1 is arranged inside the outer pot body 2. The bottom of the grinding chamber 1 is rotatably connected to the outer pot body 2. The grinding chamber rotary drive assembly 4 is mounted on the bottom of the outer pot body 2. The grinding chamber rotary drive assembly 4 is connected to the bottom of the grinding chamber 1 to drive the grinding chamber 1 to rotate. A top cover 5 is mounted on the upper opening of the outer pot body 2. The nano-scale pulverizing and grinding machine also comprises a stirring paddle 6, a stirring paddle rotary drive assembly 7 and an inner wall A guide plate 8 is provided inside the grinding chamber 1, and spherical grinding media is filled in the grinding chamber 1. A stirring paddle 6 is arranged inside the grinding chamber 1. The upper part of the stirring paddle 6 is rotatably connected to the top cover 5. The stirring paddle rotary drive assembly 7 is installed on the upper part of the top cover 5. The stirring paddle rotary drive assembly 7 is connected to the top of the stirring paddle 6 to drive the stirring paddle 6 to rotate. An inner wall guide plate 8 arranged parallel to the inner wall of the grinding chamber 1 is also provided inside the grinding chamber 1. The inner wall guide plate 8 is a hollow structure. The top end of the inner wall guide plate 8 is installed on the lower surface of the top cover 5. A discharge port 100 and a feed port 200 connected to the hollow pipe inside the inner wall guide plate 8 are opened on the upper surface of the top cover 5 as a negative pressure interface for discharging and exhausting.

[0026] Specific implementation method 2: Combination Figures 1 to 5 This embodiment is described, and the stirring paddle 6 of this embodiment is eccentrically arranged with respect to the grinding chamber 1. With such arrangement, the stirring paddle 6 realizes high-speed rotation under the action of the stirring paddle rotation drive assembly 7, and the stirring paddle 6 and the grinding chamber 1 run in the opposite direction or in the same direction. The other components and connection relationships are the same as those of the first embodiment.

[0027] Specific implementation method three: Combination Figures 1 to 5 To explain this embodiment, the stirring paddle 6 of this embodiment includes a core shaft 601 and a plurality of cylindrical rods 602. A plurality of groups of stirring units are sequentially arranged from top to bottom along the length direction of the core shaft on the side of the core shaft 601. Each group of stirring units includes a plurality of cylindrical rods 602 evenly arranged along the circumferential direction. The cylindrical rods 602 are arranged radially along the core shaft 601. With such a configuration, the high-speed rotating stirring paddle 6 drives the raw material 300 and the spherical grinding media inside the grinding chamber 1 to rotate at a high speed, forming a vortex-shaped fluid, and the raw material 300 is crushed and ground under the joint action of the high-speed rotating grinding chamber 1. Other components and connection relationships are the same as those of the first or second specific embodiments.

[0028] Specific implementation method four: Combination Figures 1 to 5 To explain this embodiment, the stirring paddle rotary drive assembly 7 of this embodiment includes a stirring paddle fixed support 701 and a stirring paddle drive motor 702. The stirring paddle fixed support 701 is installed on the upper surface of the top cover 5, and the stirring paddle drive motor 702 is installed on the stirring paddle fixed support 701. The rotating shaft of the stirring paddle fixed support 701 is connected to the top of the core shaft 601 through a coupling. With this arrangement, the stirring paddle 6 is driven to rotate by the stirring paddle drive motor 702, and the rotation direction of the stirring paddle 6 is clockwise when viewed from above. Other components and connection relationships are the same as those of the specific embodiments one, two or three.

[0029] Specific implementation method five: Combination Figures 1 to 5 This embodiment is described. The cross section of the inner wall guide plate 8 of this embodiment is composed of a right-angled trapezoid and a semicircle. A rectangular through hole is opened on the lower bottom plate of the right-angled trapezoidal part 801 of the inner wall guide plate 8. The rectangular through hole penetrates the upper and lower end surfaces of the lower bottom plate of the right-angled trapezoidal part 801. The semicircular part 802 of the inner wall guide plate 8 is arranged at the rectangular through hole of the lower bottom plate. The sharp corner 803 of the right-angled trapezoidal part 801 faces the inner wall of the grinding chamber 1. The distance between the sharp corner 803 and the inner wall of the grinding chamber 1 is 2mm to 3mm. In this way, the sharp corner 803 of the inner wall guide plate 8 maintains a small distance from the inner wall of the grinding chamber 1 to ensure that the material will not adhere to the inner wall of the grinding chamber 1. Other components and connection relationships are the same as those of the specific embodiments one, two, three or four.

[0030] The right-angled trapezoidal portion 801 , the semicircular portion 802 and the sharp corner 803 are connected by welding.

[0031] Specific implementation method six: Combination Figures 1 to 5To explain this embodiment, the distance between the lower end surface of the inner wall guide plate 8 and the bottom surface of the grinding chamber 1 is 8 mm to 12 mm. In this way, the inner wall guide plate 8 extends along the inner wall of the grinding chamber 1 to the bottom of the pot. The inner wall guide plate 8 is a hollow structure, and its interior is a hollow pipe. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four or five.

[0032] Specific implementation method seven: Combination Figures 1 to 5 The present embodiment is described. The grinding chamber rotary drive assembly 4 of the present embodiment comprises a grinding chamber rotary reduction motor 401, a grinding chamber rotary transmission mechanism, a hollow transmission shaft 402, a grinding chamber seat sleeve 403, an outer pot seat sleeve 404 and two supporting bearings 405. A pot body mounting through hole is provided at the center of the bottom of the outer pot body 2. A coaxially arranged outer pot seat sleeve 404 is provided below the outer pot body 2. The top end of the outer pot seat sleeve 404 is fixedly connected to the lower surface of the outer pot body 2. A coaxially arranged hollow transmission shaft 402 is provided inside the outer pot seat sleeve 404. The upper and lower ends of the outer side surface of the hollow transmission shaft 402 are rotatably connected to the upper and lower ends of the inner side surface of the outer pot seat sleeve 404 through two supporting bearings 405 respectively. A coaxially arranged grinding chamber seat sleeve 403 is provided below the grinding chamber 1. 3. The top of the grinding chamber seat sleeve 403 is fixedly connected to the lower surface of the grinding chamber 1, the bottom of the grinding chamber seat sleeve 403 is provided with an integrally formed seat sleeve flange, the top of the hollow transmission shaft 402 is provided with an integrally formed transmission shaft flange, the transmission shaft flange is connected to the seat sleeve flange through a plurality of connecting elements, the side of the outer pot seat sleeve 404 is provided with a vertically arranged grinding chamber rotary reduction motor 401, the housing of the grinding chamber rotary reduction motor 401 is fixedly connected to the side of the outer pot seat sleeve 404, the side of the outer pot seat sleeve 404 is provided with a seat sleeve shaft hole in the radial direction, the rotating shaft of the grinding chamber rotary reduction motor 401 passes through the seat sleeve shaft hole and extends to the inside of the outer pot seat sleeve 404, and the rotating shaft of the grinding chamber rotary reduction motor 401 is connected to the hollow transmission shaft 402 through the grinding chamber rotary transmission mechanism. With such an arrangement, the grinding chamber 1 is driven to rotate by the grinding chamber rotary reduction motor 401, and the rotation direction of the grinding chamber 1 is clockwise when viewed from above. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four, five or six.

[0033] Specific implementation method eight: Combination Figures 1 to 5This embodiment is described. The grinding chamber rotary transmission mechanism of this embodiment includes a driving bevel gear 406 and a driven bevel gear 407. The centers of the driving bevel gear 406 and the driven bevel gear 407 are respectively processed with two gear shaft holes matching the rotating shaft of the grinding chamber rotary reduction motor 401 and the hollow transmission shaft 402. The driving bevel gear 406 is installed on the rotating shaft of the grinding chamber rotary reduction motor 401 through a flat key, and the driven bevel gear 407 is installed on the hollow transmission shaft 402 through a flat key. The driven bevel gear 407 is meshed with the driving bevel gear 406. In this way, the grinding chamber rotary reduction motor 401 drives the driving bevel gear 406 to rotate, the driving bevel gear 406 is meshed with the driven bevel gear 407, and the driven bevel gear 407 drives the hollow transmission shaft 402 to rotate, thereby driving the grinding chamber seat sleeve 403 and the grinding chamber 1 to rotate. Other components and connection relationships are the same as those of the specific embodiments one, two, three, four, five, six or seven.

[0034] Specific implementation method nine: Combination Figures 1 to 5 The present embodiment is described. The nano-scale pulverizing and grinding machine of the present embodiment further comprises a cover body flip assembly 9, which comprises a flip motor bracket 901, a cover body flip reduction motor 902 and a cover body support arm 903. The top cover 5 is provided with a flip motor bracket 901 on the side, the flip motor bracket 901 is mounted on the upper part of the side wall of the outer pot body 2, the housing of the cover body flip reduction motor 902 is mounted on the flip motor bracket 901, one end of the cover body support arm 903 is processed with a support arm shaft hole, the rotating shaft of the cover body flip reduction motor 902 is connected to the support arm shaft hole through a flat key, and the other end of the cover body support arm 903 is provided with an integrally formed rectangular flange, which is connected to the top cover 5 through a plurality of connecting elements. In this way, the top cover 5 is flipped by the cover body flip reduction motor 902, which is convenient for loading the spherical grinding medium into the grinding chamber 1, or replacing the spherical grinding medium inside the grinding chamber 1, or convenient for cleaning and washing the inside of the grinding chamber 1, or convenient for installing and disassembling the components inside the grinding chamber 1. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth specific embodiments.

[0035] Specific implementation method ten: Combination Figures 1 to 5To illustrate this embodiment, the nano-scale crushing and grinding machine of this embodiment also includes a pot body pitch assembly 10, which includes a pitch motor bracket 1001, a pot body pitch reduction motor 1002, a pot body active rotating shaft 1003 and a pot body driven rotating shaft 1004. The frame 3 is a U-shaped frame, and the outer pot body 2 is located between the two side wing plates of the U-shaped frame. The left and right side walls of the outer pot body 2 are rotatably connected to the two side wing plates of the U-shaped frame through the pot body active rotating shaft 1003 and the pot body driven rotating shaft 1004 respectively. A pitch motor bracket 1001 is provided on the side of the pitch motor bracket 1001, and the pitch motor bracket 1001 is installed on the pitch motor bracket 1001. The shell of the pot body pitch reduction motor 1002 is installed on the pitch motor bracket 1001, and the rotating shaft of the pot body pitch reduction motor 1002 is connected to the pot body active rotating shaft 1003 through a coupling. With such arrangement, the outer pot body 2 is driven by the pot body pitch reduction motor 1002 to perform pitching motion, and can be used to clean the grinding chamber 1 when not in operation. This function is not activated during the crushing and grinding process. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiment.

[0036] How it works

[0037] Combination Figures 1 to 5 The working principle of the nano-scale pulverizing and grinding machine described in the present invention is described as follows: the capacity of the grinding chamber 1 is 80-90%, and the grinding chamber 1 is filled with spherical grinding media. The raw material 300 is transported downward to a position near the bottom of the grinding chamber 1 through the feed port 200 on the top cover 5 and the hollow pipe inside the inner wall guide plate 8 by gravity drop and air fluidization. At this position, the raw material 300 is sucked into the stirred spherical grinding media by the rotation of the grinding chamber 1. In the grinding chamber 1, the energy input by the stirring paddle 6 generates impact force and friction force for effective grinding by relying on the action of the spherical grinding media. When the raw material 300 is ground into fine particles, it moves upward from the bottom by relying on the fluidized air 500. The finer the particles, the higher the moving position. When the particles reach the finished product 400, the discharge is completed through the discharge port 100 on the top cover 5.

[0038] Specifically, first determine the feed area A at the feed port 200 according to the feed amount M. 进 , determine the material entrainment wind speed V according to the particle diameter of the raw material 300 原 , spherical grinding media are pre-added in the grinding chamber 1. The wind entrains the raw material 300 into the grinding chamber 1 through the hollow pipe inside the inner wall guide plate 8. The raw material 300 enters the grinding chamber 1 at a point close to the bottom plate of the grinding chamber 1. As the grinding chamber 1 and the stirring paddle 6 rotate, the spherical grinding media and the raw material 300 collide irregularly in the grinding chamber 1, and the raw material 300 is abraded and becomes smaller and smaller. After the entrained wind continuously enters the grinding chamber 1 with the raw material 300, it will be continuously discharged from the discharge port 100.

[0039] Q=AVS (1)

[0040] Among them, Q is the wind volume, A is the cross-sectional area through which the wind passes, V is the wind speed, and S is the time.

[0041] Determine the feed wind speed V at the feed inlet 200 according to the particle diameter of the finished product 400 进 and the discharge wind speed V at the discharge port 100 出 , the known feed wind speed V 进 , discharge wind speed V 出 and feed port area A 进 Substituting into equation (1) we can get the outlet area A at outlet 100: 出 , so by controlling the feed port area A 进 Able to control the discharge wind speed V at the discharge port 100 出 , the outlet wind carries the finished product 400 material particles out of the grinding chamber 1.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano-scale pulverizing and grinding machine, comprising a grinding chamber (1), an outer pot body (2), a frame (3), a grinding chamber rotary drive assembly (4) and a top cover (5), wherein the outer pot body (2) is mounted on the frame (3), a coaxially arranged grinding chamber (1) is arranged inside the outer pot body (2), the bottom of the grinding chamber (1) is rotatably connected to the outer pot body (2), the grinding chamber rotary drive assembly (4) is mounted on the bottom of the outer pot body (2), the grinding chamber rotary drive assembly (4) is connected to the bottom of the grinding chamber (1) to drive the grinding chamber (1) to rotate, and a top cover (5) is mounted at the upper opening of the outer pot body (2), characterized in that: The nano-scale pulverizing and grinding machine further comprises a stirring paddle (6), a stirring paddle rotary drive assembly (7) and an inner wall guide plate (8). The grinding chamber (1) is filled with spherical grinding media. The grinding chamber (1) is provided with a stirring paddle (6). The upper part of the stirring paddle (6) is rotatably connected to the top cover (5). The stirring paddle rotary drive assembly (7) is mounted on the upper part of the top cover (5). The stirring paddle rotary drive assembly (7) is connected to the top of the stirring paddle (6) to drive the stirring paddle (6) to rotate. The grinding chamber (1) is further provided with an inner wall guide plate (8) arranged parallel to the inner wall of the grinding chamber (1). The inner wall guide plate (8) is a hollow structure. The top end of the inner wall guide plate (8) is mounted on the lower surface of the top cover (5). The upper surface of the top cover (5) is provided with a discharge port (100) and a feed port (200) connected to a hollow pipe inside the inner wall guide plate (8) as a negative pressure interface for discharge and exhaust.

2. A nano-scale pulverizing and grinding machine according to claim 1, characterized in that: The stirring paddle (6) is arranged eccentrically with respect to the grinding chamber (1).

3. A nano-scale pulverizing and grinding machine according to claim 1 or 2, characterized in that: The stirring paddle (6) comprises a core shaft (601) and a plurality of cylindrical rods (602); a plurality of groups of stirring units are sequentially arranged on the side of the core shaft (601) from top to bottom along the length direction of the core shaft; each group of stirring units comprises a plurality of cylindrical rods (602) uniformly arranged along the circumferential direction; and the cylindrical rods (602) are radially arranged along the core shaft (601).

4. A nano-scale pulverizing and grinding machine according to claim 3, characterized in that: The stirring paddle rotation drive assembly (7) comprises a stirring paddle fixed support (701) and a stirring paddle drive motor (702); the stirring paddle fixed support (701) is mounted on the upper surface of the top cover (5); the stirring paddle drive motor (702) is mounted on the stirring paddle fixed support (701); and the rotating shaft of the stirring paddle fixed support (701) is connected to the top end of the core shaft (601) via a coupling.

5. The nano-scale pulverizing and grinding machine according to claim 1, characterized in that: The cross section of the inner wall guide plate (8) is composed of a right-angled trapezoid and a semicircle. A rectangular through hole is provided on the lower bottom plate of the right-angled trapezoidal part (801) of the inner wall guide plate (8). The rectangular through hole penetrates the upper and lower end surfaces of the lower bottom plate of the right-angled trapezoidal part (801). The semicircular part (802) of the inner wall guide plate (8) is arranged at the rectangular through hole of the lower bottom plate. The sharp corner (803) of the right-angled trapezoidal part (801) faces the inner wall of the grinding chamber (1). The distance between the sharp corner (803) and the inner wall of the grinding chamber (1) is 2 mm to 3 mm.

6. A nano-scale pulverizing and grinding machine according to claim 5, characterized in that: The distance between the lower end surface of the inner wall guide plate (8) and the bottom surface of the grinding chamber (1) is 8 mm to 12 mm.

7. A nano-scale pulverizing and grinding machine according to claim 4 or 6, characterized in that: The grinding chamber rotary drive assembly (4) comprises a grinding chamber rotary reduction motor (401), a grinding chamber rotary transmission mechanism, a hollow transmission shaft (402), a grinding chamber seat sleeve (403), an outer pot seat sleeve (404) and two support bearings (405); a pot body mounting through hole is provided at the center of the bottom of the outer pot body (2); a coaxially arranged outer pot seat sleeve (404) is provided below the outer pot body (2); the top end of the outer pot seat sleeve (404) is fixedly connected to the lower surface of the outer pot body (2); a coaxially arranged hollow transmission shaft (402) is provided inside the outer pot seat sleeve (404); the upper and lower ends of the outer side surface of the hollow transmission shaft (402) are rotatably connected to the upper and lower ends of the inner side surface of the outer pot seat sleeve (404) through two support bearings (405); a coaxially arranged grinding chamber seat sleeve (403) is provided below the grinding chamber (1); The top of the grinding chamber seat sleeve (403) is fixedly connected to the lower surface of the grinding chamber (1); the bottom of the grinding chamber seat sleeve (403) is provided with an integrally formed seat sleeve flange; the top of the hollow transmission shaft (402) is provided with an integrally formed transmission shaft flange; the transmission shaft flange is connected to the seat sleeve flange via a plurality of connection elements; a grinding chamber rotary reduction motor (401) arranged vertically is provided on the side of the outer pot seat sleeve (404); a housing of the grinding chamber rotary reduction motor (401) is fixedly connected to the side of the outer pot seat sleeve (404); a seat sleeve shaft hole is radially provided on the side of the outer pot seat sleeve (404); a rotating shaft of the grinding chamber rotary reduction motor (401) passes through the seat sleeve shaft hole and extends to the inside of the outer pot seat sleeve (404); and a rotating shaft of the grinding chamber rotary reduction motor (401) is connected to the hollow transmission shaft (402) via a grinding chamber rotary transmission mechanism.

8. The nano-scale pulverizing and grinding machine according to claim 7, characterized in that: The grinding chamber rotary transmission mechanism comprises a driving bevel gear (406) and a driven bevel gear (407). The driving bevel gear (406) and the driven bevel gear (407) are respectively processed with two gear shaft holes matching the rotating shaft of the grinding chamber rotary reduction motor (401) and the hollow transmission shaft (402) at their centers. The driving bevel gear (406) is mounted on the rotating shaft of the grinding chamber rotary reduction motor (401) through a flat key, and the driven bevel gear (407) is mounted on the hollow transmission shaft (402) through a flat key. The driven bevel gear (407) is meshed with the driving bevel gear (406).

9. The nano-scale pulverizing and grinding machine according to claim 8, characterized in that: The nano-scale pulverizing and grinding machine also includes a cover flip assembly (9), which includes a flip motor bracket (901), a cover flip reduction motor (902) and a cover support arm (903). The top cover (5) is provided with a flip motor bracket (901) on the side, the flip motor bracket (901) is mounted on the upper part of the side wall of the outer pot body (2), the housing of the cover flip reduction motor (902) is mounted on the flip motor bracket (901), one end of the cover support arm (903) is processed with a support arm shaft hole, the rotating shaft of the cover flip reduction motor (902) is connected to the support arm shaft hole through a flat key, and the other end of the cover support arm (903) is provided with an integrally formed rectangular flange, which is connected to the top cover (5) through a plurality of connecting elements.

10. The nano-scale pulverizing and grinding machine according to claim 9, characterized in that: The nano-scale crushing and grinding machine also includes a pot body pitching assembly (10), which includes a pitching motor bracket (1001), a pot body pitching reduction motor (1002), a pot body driving rotating shaft (1003) and a pot body driven rotating shaft (1004). The frame (3) is a U-shaped frame, and the outer pot body (2) is located between the two side wing plates of the U-shaped frame. The left and right side walls of the outer pot body (2) are respectively connected by the pot body driving rotating shaft (1003) and the pot body driven rotating shaft (1004). The rotating shaft (1004) is rotatably connected to the wing plates on both sides of the U-shaped frame, a pitch motor bracket (1001) is provided on the side of the pitch motor bracket (1001), the pitch motor bracket (1001) is mounted on the pitch motor bracket (1001), the shell of the pot body pitch reduction motor (1002) is mounted on the pitch motor bracket (1001), and the rotating shaft of the pot body pitch reduction motor (1002) is connected to the pot body active rotating shaft (1003) through a coupling.

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