Grinding rotor and vertical nano sand mill with same

Abstract

The invention relates to a grinding rotor which comprises a top wall and a side wall connected with the top wall, a grinding inner cavity is formed in the grinding rotor, a plurality of grinding rod blocks are arranged on the peripheral side of the side wall, and the cross sectional areas of the grinding rod blocks are in the trend of decreasing from inside to outside in the radial direction of the grinding rotor. A first inclined plane is arranged on the head-on side of at least part of the grinding rod blocks in the rotating direction of the grinding rotor, and an included angle is formed between the first inclined plane and the horizontal plane; a plurality of different-direction variable-diameter channels are arranged on the side wall in a penetrating mode, each different-direction variable-diameter channel gradually shrinks from inside to outside, each different-direction variable-diameter channel comprises a top face, a first side face, a bottom face and a second side face which are sequentially connected, and an included angle is formed between the top face and the bottom face. Through the design of the grinding rod block and the different-direction reducing channel and the cooperation with the separation wheel assembly, a grinding dead zone is prevented from being formed in the grinding cavity, and the grinding efficiency and the grinding uniformity degree are effectively improved. The invention further relates to a vertical nanometer sand mill with the grinding rotor.

Description

Technical Field

[0001] The invention relates to the field of sand milling equipment, in particular to a grinding rotor and a vertical nano sand mill having the grinding rotor. Background Art

[0002] Nano sand mill is a highly efficient equipment used for ultrafine grinding, especially dispersion and grinding of nano-scale materials. When working, it energizes the grinding media (such as zirconium balls, etc.) and materials through the high-speed rotating grinding rotor, generates high-frequency collision and friction motion between the grinding media and between the grinding media and the grinding barrel wall, and the particle size of the material particles is ground to the nanometer level under the extrusion and shearing action of the grinding media. For example, Chinese utility model patent CN215507082U discloses a grinder with a centrifugal separator, the grinder includes a grinding barrel, a grinding chamber is formed in the grinding barrel, the grinding chamber has materials and grinding media, a rotating shaft extending into the grinding chamber, a grinding block is provided on the rotating shaft, the centrifugal separator is provided on the rotating shaft, the centrifugal separator includes an upper flange and a lower flange provided on the rotating shaft, a plurality of separation fins are provided between the upper flange and the lower flange, and there is a gap between the adjacent separation fins. The centrifugal separator used in the utility model will not be blocked and has a good separation effect.

[0003] However, the grinding block (i.e., the grinding rotor) in the above-mentioned grinder can only impart a velocity component to the grinding medium and the grinding material along the circumferential direction of rotation, resulting in low grinding efficiency. Moreover, it is difficult for the grinding medium and the grinding material to form a local circulation in the above-mentioned grinding chamber. The grinding medium and the grinding material are easily accumulated to form a grinding dead zone, thereby resulting in poor grinding uniformity of the material.

[0004] Therefore, it is necessary to provide a technical solution to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a grinding rotor and a vertical nano sand mill having the grinding rotor, which can solve the technical problems in the prior art that the grinding efficiency is low, the grinding media and the grinding materials are easy to accumulate to form a grinding dead zone, thereby resulting in poor grinding uniformity of the materials.

[0006] In order to achieve the above-mentioned purpose, on the one hand, the present invention provides a grinding rotor, which includes a top wall and a side wall connected to the outer edge of the top wall, the side wall is cylindrical, a grinding inner cavity is opened inside the grinding rotor, and a plurality of grinding rod blocks are arranged on the outer peripheral side of the side wall, and the cross-sectional area of ​​the grinding rod blocks decreases from the inside to the outside along the radial direction of the grinding rotor; at least part of the grinding rod blocks are provided with a first inclined plane on the front side along the rotation direction of the grinding rotor, and the first inclined plane is set at an angle to the horizontal plane; a plurality of different-direction variable-diameter channels are penetrated through the side wall, each of the different-direction variable-diameter channels tends to gradually shrink from the inside to the outside, and each of the different-direction variable-diameter channels includes a top surface, a first side surface, a bottom surface and a second side surface connected in sequence, and the top surface is set at an angle to the bottom surface.

[0007] Furthermore, the first side surface and the second side surface of the different-direction variable-diameter channel are arranged in parallel, and a projection of the first side surface on a horizontal plane forms an angle with a radial direction of the side wall.

[0008] Furthermore, the grinding rod blocks are evenly arranged in multiple rows on the outer peripheral side of the side wall, each row of the grinding rod blocks is arranged between two adjacent anisotropic variable-diameter channels, and each row of the grinding rod blocks includes an upper rod block, at least one middle rod block and a lower rod block which are arranged in sequence from top to bottom.

[0009] Further, each of the grinding rod blocks is provided with the first inclined plane on the front side along the rotation direction of the grinding rotor, and each of the first inclined planes is arranged downward.

[0010] Further, each of the grinding rod blocks is provided with the first inclined plane on the front side along the rotation direction of the grinding rotor, the first inclined plane of each of the upper rod blocks is arranged downward, the first inclined plane of each of the lower rod blocks is arranged upward, and the first inclined plane of the middle rod block is arranged upward or downward. When there is only one middle rod block in each column of the grinding rod blocks, the middle rod blocks with the first inclined plane facing upward and the middle rod blocks with the first inclined plane facing downward are arranged alternately in the circumferential direction; when the number of the middle rod blocks in each column of the grinding rod blocks is greater than one, the middle rod blocks with the first inclined plane facing upward and the middle rod blocks with the first inclined plane facing downward are arranged alternately in the circumferential direction and also in the vertical direction.

[0011] Furthermore, each of the upper rod blocks and each of the lower rod blocks is provided with the first inclined plane on the front side along the rotation direction of the grinding rotor, the first inclined plane of each of the upper rod blocks is arranged downward, the first inclined plane of each of the lower rod blocks is arranged upward, and each of the middle rod blocks is provided with an arc surface on the front side along the rotation direction of the grinding rotor.

[0012] On the other hand, the present invention also provides a vertical nano-sand mill, which has a grinding rotor as described in any one of claims 1 to 4, and further includes a frame, a grinding cylinder, a separation wheel assembly, a driving mechanism and a main shaft, wherein the driving mechanism and the main shaft are both arranged on the frame, and the driving mechanism is used to drive the main shaft to rotate relative to the frame; the grinding rotor is arranged inside the grinding cylinder, and the separation wheel assembly is arranged in the grinding inner cavity; the separation wheel assembly includes a separation wheel seat, and the center position of the top of the separation wheel seat is the discharge area A plurality of separation protrusions are evenly arranged on the top of the separation wheel seat around the discharge area, and a separation discharge channel connected to the discharge area is formed between adjacent separation protrusions, and the separation discharge channel is curved, and the separation discharge channel gradually expands from the outside to the inside; a main shaft discharge channel is opened inside the main shaft, and the bottom end of the main shaft passes through the top of the grinding cylinder and the top wall of the grinding rotor in sequence and extends to the discharge area of ​​the separation wheel assembly, and the main shaft discharge channel is connected to the discharge area; the grinding rotor and the separation wheel assembly both rotate synchronously with the main shaft.

[0013] Further, the separation protrusion includes a first arcuate surface, a second arcuate surface and a connecting curved surface which are connected in sequence, and the first arcuate surface and the second arcuate surface extend respectively along the direction from the center position to the edge position of the separation wheel seat, and the connecting curved surface is close to the edge position of the separation wheel seat; along the rotation direction of the separation wheel seat, the separation discharge channel is formed between the second arcuate surface in one separation protrusion and the first arcuate surface in the next separation protrusion; along the rotation direction of the separation wheel seat, the connecting curved surface includes a small chamfered surface, a third arcuate surface and a large chamfered surface in sequence, the small chamfered surface is connected to the end of the first arcuate surface away from the center position, and the large chamfered surface is connected to the end of the second arcuate surface away from the center position.

[0014] Furthermore, the projections of the first arc surface, the second arc surface and the third arc surface on the horizontal plane are respectively the first arc line, the second arc line and the third arc line; in the same separation protrusion, the distance between the point on the third arc line with the longest distance to the rotation center of the separation wheel seat and the outer end point of the first arc line is greater than the distance between it and the outer end point of the second arc line, and the distance between the center of curvature of the third arc line and the outer end point of the first arc line is less than the distance between the center of curvature of the third arc line and the outer end point of the second arc line.

[0015] Furthermore, a plurality of strip-shaped propulsion protrusions are evenly arranged around the center position on the bottom surface of the separation wheel seat, and a second inclined plane is arranged on the front side of each strip-shaped propulsion protrusion along the rotation direction of the separation wheel seat, and a vertical plane is arranged on the back side, the vertical plane and the bottom surface of the separation wheel seat are perpendicular to each other, and the vertical plane is arranged at an angle to the radial direction of the separation wheel seat, and the second inclined plane is arranged at an angle to the bottom surface of the separation wheel seat.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1) By arranging a plurality of grinding rod blocks, and at least some of the grinding rod blocks are provided with a first inclined plane on the front side along the rotation direction of the grinding rotor, when the grinding rotor rotates, the first inclined plane frontally imparts a velocity component to the grinding medium and the material along the rotation circumferential direction and vertical direction of the grinding rotor, thereby increasing the grinding collision frequency between the grinding media and between the grinding media and the wall of the grinding cylinder and the internal circulation rate, thereby effectively improving the grinding efficiency;

[0018] (2) By providing a plurality of different-direction variable-diameter channels through the side wall, the grinding media and the grinding materials enter and exit the grinding inner cavity through the space at the bottom of the grinding rotor and the different-direction variable-diameter channels, forming a local circulation between the inner and outer cavities of the grinding. Since the different-direction variable-diameter channels gradually shrink from the inside to the outside, the probability of the grinding media on the outer peripheral side of the grinding rotor entering the grinding inner cavity from the different-direction variable-diameter channels is effectively reduced. At the same time, the speed at which the grinding media and large-size material particles in the grinding inner cavity flow out to the outer peripheral side of the grinding rotor can be accelerated, thereby forming a one-way circulation, playing a certain classification and pre-separation role, effectively shortening the period of local circulation of the grinding media, avoiding the accumulation of grinding media to form a grinding dead zone, and improving the uniformity of grinding;

[0019] (3) By arranging a separation wheel assembly in the grinding inner cavity of the grinding rotor, the grinding rotor and the separation wheel assembly cooperate to grind and separate the grinding material, wherein the grinding medium forms a multi-stage local circulation under the action of the grinding rod block, the strip-shaped propulsion block and the anisotropic variable diameter channel, thereby eliminating the grinding dead zone, and the grinding material forms a two-stage classification under the action of the intersecting vortex and the curvature peeling protrusion structure, and forms a three-stage separation under the action of the anisotropic variable diameter channel, the curvature peeling protrusion structure and the separation discharge channel, thereby greatly improving the grinding efficiency and the grinding uniformity; and the grinding rotor with a special structural design makes the grinding action on the grinding material mainly friction shearing and supplemented by collision extrusion, thereby making the grinding action on the grinding material softer and effectively improving the concentration of the particle size distribution of the material after grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the grinding rotor of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the grinding rotor of the present invention from another angle.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of a grinding rotor in another embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a grinding rotor in another embodiment of the present invention.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the vertical nano sand mill of the present invention.

[0025] Figure 6 It is a three-dimensional schematic diagram of the main shaft, the separation wheel assembly and the grinding rotor of the present invention combined together.

[0026] Figure 7 It is a schematic cross-sectional view of the main shaft, the separation wheel assembly and the grinding rotor of the present invention.

[0027] Figure 8 Schematic diagram of the movement path of the grinding medium inside the grinding cylinder of the present invention.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the separation wheel assembly of the present invention.

[0029] Fig.10 It is a schematic three-dimensional structure diagram of the separation wheel assembly of the present invention from another angle.

[0030] Fig.11 It is a schematic diagram of the top structure of the separation wheel assembly of the present invention.

[0031] Fig.12It is a schematic diagram of the top view of the separation bump of the present invention.

[0032] Fig.13 It is a schematic cross-sectional structure diagram of the pressure sensor, the discharge cylinder, the main shaft and the second pulley of the present invention.

[0033] Fig.14 for Fig.13 Schematic diagram of the enlarged structure at point A in the middle.

[0034] Description of reference numerals:

[0035] 2-grinding cylinder; 3-grinding rotor; 31-grinding inner cavity; 32-grinding rod block; 320-first inclined plane; 321-upper rod block; 322-middle rod block; 323-lower rod block; 324-arc surface; 325-vertical surface; 33-different-direction variable-diameter channel; 331-top surface; 332-first side surface; 333-bottom surface; 334-second side surface; 34-top wall; 341-card-connecting through hole; 342-card-connecting groove; 35-side wall; 4-separating wheel assembly; 41-separating wheel seat; 42-discharging area; 43-separating protrusion; 431-first arc surface; 432-second arc surface; 433-connecting curved surface; 4 331-small chamfered surface; 4332-third arc surface; 4333-large chamfered surface; 44-separation discharge channel; 45-fixing ring; 46-connecting through hole; 47-strip-shaped propulsion protrusion; 471-vertical plane; 472-second inclined plane; 5-driving mechanism; 51-motor; 52-first pulley; 53-second pulley; 6-spindle; 61-spindle discharge channel; 611-large diameter section; 612-transition section; 613-small diameter section; 62-discharge connecting channel; 7-discharge barrel; 71-discharge through hole; 8-baffle; 81-baffle through hole; 9-feeding mechanism; 10-frame; 11-pressure sensor. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0037] Example 1

[0038] like Figure 1-4As shown, the present invention provides a grinding rotor, the grinding rotor 3 includes a top wall 34 and a side wall 35 connected to the outer edge of the top wall 34, the side wall 35 is cylindrical, the grinding rotor 3 is provided with a grinding inner cavity 31, and a plurality of grinding rod blocks 32 are arranged on the outer peripheral side of the side wall 35, and the cross-sectional area of ​​the grinding rod blocks 32 decreases from the inside to the outside along the radial direction of the grinding rotor 3; at least part of the grinding rod blocks 32 are provided with a first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3, and the first inclined plane 320 is arranged at an angle with the horizontal plane, specifically, the angle between the first inclined plane 320 and the horizontal plane is in the range of 30° to 90°; the grinding rod blocks 32 relative to the front side are provided with a first inclined plane 320; A vertical surface 325 is set on one side. Since the cross-sectional area of ​​the grinding rod block 32 decreases from the inside to the outside along the radial direction of the grinding rotor 3, the first inclined plane 320 and the vertical surface 325 are also set at an angle along the radial direction of the grinding rotor 3. Specifically, along the radial direction of the grinding rotor 3, the angle between the first inclined plane 320 and the vertical surface 325 ranges from 0° to 60°; a plurality of different-direction variable-diameter channels 33 are provided through the side wall 35, and each of the different-direction variable-diameter channels 33 gradually shrinks from the inside to the outside; each of the different-direction variable-diameter channels 33 includes a top surface 331, a first side surface 332, a bottom surface 333 and a second side surface 334 connected in sequence, and the top surface 331 and the bottom surface 333 are set at an angle. Specifically, the bottom surface 333 is arranged parallel to the horizontal plane, and the top surface 331 is arranged to be inclined downward from the inside to the outside. Specifically, the angle between the bottom surface 333 and the top surface 331 ranges from 0° to 60°, so that the anisotropic variable-diameter channel 33 has a trend of gradually shrinking from the inside to the outside; the first side surface 332 and the second side surface 334 can be arranged in parallel or at an angle.

[0039] In this embodiment, a plurality of grinding rod blocks 32 are provided, and the cross-sectional area of ​​the grinding rod blocks 32 decreases from the inside to the outside along the radial direction of the grinding rotor 3. When the grinding rotor 3 rotates, the grinding rod blocks 32 can impart a velocity component to the grinding medium along the radial direction of the grinding rotor; and at least part of the grinding rod blocks 32 are provided with a first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3. When the grinding rotor 3 rotates, the first inclined plane 320 imparts a velocity component to the grinding medium and the grinding material along the rotation circumferential direction and vertical direction of the grinding rotor 3, thereby increasing the grinding collision frequency and internal circulation rate between the grinding media and between the grinding media and the cylinder wall of the grinding cylinder, and effectively improving the grinding efficiency. In addition, a plurality of anisotropic variable-diameter channels 33 are provided through the side wall 35. The grinding medium and the grinding material enter and exit the grinding inner cavity 31 through the space at the bottom of the grinding rotor 3 and the anisotropic variable-diameter channels 33, forming a local circulation between the inner and outer cavities of the grinding. Since the anisotropic variable-diameter channels 33 gradually shrink from the inside to the outside, the probability of the grinding medium on the outer peripheral side of the grinding rotor 3 entering the grinding inner cavity 31 from the anisotropic variable-diameter channels 33 is effectively reduced. At the same time, the speed at which the grinding medium and large-size material particles in the grinding inner cavity 31 flow out to the outer peripheral side of the grinding rotor 3 can be accelerated, thereby forming a one-way circulation, playing a certain grading and pre-separation role, effectively shortening the period of local circulation of the grinding medium, avoiding the accumulation of the grinding medium to form a grinding dead zone, and improving the uniformity of grinding.

[0040] Preferably, if Figure 2 As shown, the first side surface 332 and the second side surface 334 of the different-direction variable diameter channel 33 are arranged in parallel, and the projection of the first side surface 332 on the horizontal plane is arranged at an angle with the radial direction of the side wall 35. In this embodiment, by arranging the different-direction variable diameter channel 33 at a certain angle with the radial direction of the grinding rotor 3, it is beneficial to separate the grinding media and large-size material particles close to the side wall 35 in the grinding inner cavity 31 to the grinding main body functional area on the outer peripheral side of the grinding rotor 3, thereby playing a certain classification and separation role; and the first side surface 332 and the second side surface 334 are arranged in parallel, which is convenient for the processing of the different-direction variable diameter channel 33 in actual production.

[0041] Preferably, if Figure 1-4As shown, the grinding rod blocks 32 are evenly arranged in multiple rows on the outer peripheral side of the side wall 35, and each row of the grinding rod blocks 32 is arranged between two adjacent different-direction variable-diameter channels 33, and each row of the grinding rod blocks 32 includes an upper rod block 321, at least one middle rod block 322, and a lower rod block 323 arranged in sequence from top to bottom. In this embodiment, by arranging a row of grinding rod blocks 32 between two adjacent different-direction variable-diameter channels 33, when the grinding media and the grinding materials flow out of the different-direction variable-diameter channels 33 to the outer peripheral side of the grinding rotor 3, they can immediately collide and squeeze with the grinding rod blocks 32, and flow into the channel between the grinding rod blocks 32, and then flow into the next different-direction variable-diameter channel 33 along the channel between the grinding rod blocks 32, which effectively increases the collision frequency between the grinding materials and the grinding media, thereby improving the grinding efficiency.

[0042] Preferably, if Figure 1-2 As shown, each of the grinding rod blocks 32 is provided with the first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3, and each of the first inclined planes 320 is arranged downward. In this embodiment, by providing the first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3 of each grinding rod block 32, when the grinding medium and the grinding material contact each grinding rod block 32, the grinding medium and the grinding material can be given a speed component along the rotation circumference of the grinding rotor 3 and along the vertical direction, which effectively increases the grinding collision frequency and internal circulation speed between the grinding medium and the material, thereby improving the grinding efficiency.

[0043] Preferably, if Figure 3 As shown, each of the grinding rod blocks 32 is provided with the first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3, the first inclined plane 320 of each of the upper rod blocks 321 is arranged downward, the first inclined plane 320 of each of the lower rod blocks 323 is arranged upward, and the first inclined plane 320 of the middle rod block 322 is arranged upward or downward. When the number of the middle rod block 322 in each column of the grinding rod blocks 32 is only one, the middle rod block 322 with the first inclined plane 320 facing upward and the middle rod block 322 with the first inclined plane 320 facing downward are arranged alternately in the circumferential direction; when the number of the middle rod block 322 in each column of the grinding rod blocks 32 is greater than one, the middle rod block 322 with the first inclined plane 320 facing upward and the middle rod block 322 with the first inclined plane 320 facing downward are arranged alternately in the circumferential direction and also in the vertical direction. In this embodiment, the first inclined planes 320 of the upper rod block 321, the middle rod block 322 and the lower rod block 323 are arranged in different directions to control the movement trajectory of the grinding medium and the grinding material. For example, the number of the middle rod block 322 is only one, and the movement trajectory of the grinding medium and the grinding material is controlled as follows: Figure 3As shown by the arrows, the grinding medium and the grinding material in contact with the first inclined plane 320 of the upper rod block 321 move in the radial and downward directions, and the grinding medium and the grinding material in contact with the first inclined plane 320 of the lower rod block 323 move in the rotation circumferential direction and upward directions of the grinding rotor 3, that is, the grinding medium and the grinding material move toward the middle of the grinding rotor 3, thereby increasing the frequency of mutual collision and extrusion between the grinding medium and the grinding material, and the middle rod blocks 322 with different orientations are alternately arranged, so that the grinding medium and the grinding material alternately intersect, collide and extrude in the upper channel between the upper rod block 321 and the middle rod block 322, and in the lower channel between the middle rod block 322 and the lower rod block 323, further increasing the frequency of mutual collision and extrusion between the grinding medium and the grinding material, thereby effectively improving the grinding efficiency of the sand mill.

[0044] Preferably, if Figure 4 As shown, each of the upper rod blocks 321 and each of the lower rod blocks 323 is provided with the first inclined plane 320 on the front side along the rotation direction of the grinding rotor 3, the first inclined plane 320 of each of the upper rod blocks 321 is arranged downward, the first inclined plane 320 of each of the lower rod blocks 323 is arranged upward, and each of the middle rod blocks 322 is provided with an arc surface 324 on the front side along the rotation direction of the grinding rotor 3. In this embodiment, taking the number of the middle rod block 322 as an example, the movement trajectory of the grinding medium and the grinding material is as follows: Figure 4 As shown by the arrows, the first inclined plane 320 of the upper rod block 321 and the lower rod block 323 also makes the grinding medium and the grinding material move toward the middle of the grinding rotor 3. At the same time, the arc surface 324 is set on the front side of the middle rod block 322, so that when the grinding medium and the grinding material pass through each row of grinding rod blocks 32, they can intersect, collide and squeeze in the upper channel between the upper rod block 321 and the middle rod block 322, and in the lower channel between the middle rod block 322 and the lower rod block 323, which further increases the frequency of mutual collision and squeezing between the grinding medium and the grinding material, thereby effectively improving the grinding efficiency of the sand mill. In addition, setting the front side of the middle rod block 322 as the arc surface 324 helps to reduce the wear of the front side of the middle rod block 322 during the collision process and extend the service life.

[0045] Example 2

[0046] like Figure 5-7As shown, the present invention also provides a vertical nano-grinding machine, the vertical nano-sand mill has a grinding rotor 3 as described in any one of Example 1, the vertical nano-sand mill also includes a frame 10, a grinding cylinder 2, a separation wheel assembly 4, a driving mechanism 5 and a main shaft 6, the driving mechanism 5 and the main shaft 6 are both arranged on the frame 10, and the driving mechanism 5 is used to drive the main shaft 6 to rotate relative to the frame 10; the grinding rotor 3 is arranged inside the grinding cylinder 2, and the separation wheel assembly 4 is arranged in the grinding inner cavity 31; the separation wheel assembly 4 includes a separation wheel seat 41, the center position of the top of the separation wheel seat 41 is a discharge area 42, and the separation A plurality of separation protrusions 43 are evenly arranged on the top of the wheel seat 41 around the discharge area 42, and a separation discharge channel 44 connected to the discharge area 42 is formed between adjacent separation protrusions 43, and the separation discharge channel 44 is curved, and the separation discharge channel 44 gradually expands from the outside to the inside; a main shaft discharge channel 61 is opened inside the main shaft 6, and the bottom end of the main shaft 6 passes through the top of the grinding cylinder 2 and the top wall 34 of the grinding rotor 3 in sequence and extends to the discharge area 42 of the separation wheel assembly 4, and the main shaft discharge channel 61 is connected to the discharge area 42; the grinding rotor 3 and the separation wheel assembly 4 both rotate synchronously with the main shaft 6. The driving mechanism 5 specifically includes a motor 51, a first pulley 52 connected to the output end of the motor 51, and a second pulley 53 sleeved on the outer side of the main shaft 6, and the first pulley 52 and the second pulley 53 are connected by a synchronous belt. In other embodiments, the driving mechanism 5 can also be a driving mechanism of other forms, which will not be repeated here. Furthermore, a snap-in hole 341 is provided in the top wall 34, and a snap-in groove 342 communicating with the snap-in hole 341 is provided on the hole wall of the snap-in hole 341. The spindle 6 is inserted into the snap-in hole 341 and cooperates with the snap-in groove 342, so that the spindle 6 drives the grinding rotor 3 to rotate synchronously. In addition, a feeding mechanism 9 is provided at the upper end of the grinding cylinder 2, and the feeding mechanism 9 is communicated with the interior of the grinding cylinder 2, and the grinding medium and grinding material are input into the interior of the grinding cylinder 2 through the feeding mechanism 9. A discharge port is also provided at the bottom of the grinding cylinder 2. When it is necessary to clean the interior of the grinding cylinder 2, the discharge port can be opened to discharge the grinding medium and residue in the grinding cylinder 2 to the outside.

[0047] During the actual working process, the grinding material enters the grinding inner cavity 31 from the feeding mechanism 9 on the upper part of the grinding cylinder 2, and the main shaft 6 is driven by the driving mechanism 5 to rotate at a high speed, thereby driving the grinding rotor 3 and the separation wheel assembly 4 to rotate synchronously. The rotation of the grinding rotor 3 and the separation wheel assembly 4 drives the grinding material and the grinding medium inside the grinding cylinder 2 to move, thereby driving the grinding medium to perform high-frequency impact, shear and friction on the material, thereby achieving grinding of the material; the material, grinding slurry and grinding medium enter the grinding inner cavity 31, and a plurality of separation protrusions 43 are arranged on the top of the separation wheel seat 41 to form a plurality of separation discharge channels 44. The ground slurry enters the discharge area 42 through the separation discharge channel 44, and flows to the main shaft discharge channel 61 through the discharge area 42, and is finally discharged outward. In addition, the local circulation rate of the grinding medium is increased and the proportion of the grinding medium in the separation chamber is reduced by the cooperation between the grinding rotor and the separation wheel assembly. The specific movement path of the grinding medium inside the grinding cylinder 2 under the interaction of the grinding rotor and the separation wheel assembly is as follows: Figure 8 Indicated by the arrow.

[0048] Preferably, if Figure 8-11 As shown, the separation protrusion 43 includes a first arc surface 431, a second arc surface 432 and a connecting curved surface 433 which are connected in sequence. The first arc surface 431 and the second arc surface 432 extend in the direction from the center position to the edge position of the separation wheel seat 41, respectively. The connecting curved surface 433 is close to the edge position of the separation wheel seat 41. Along the rotation direction of the separation wheel seat 41, the second arc surface 432 in one separation protrusion 43 and the first arc surface 431 in the next separation protrusion 43 are connected. The separation discharge channel 44 is formed between the two surfaces, specifically, the curvature radius of the first arc surface 431 is greater than or equal to the curvature radius of the second arc surface 432; along the rotation direction of the separation wheel seat 41, the connecting curved surface 433 sequentially includes a small chamfered surface 4331, a third arc surface 4332 and a large chamfered surface 4333, the small chamfered surface 4331 is connected to the end of the first arc surface 431 away from the center position, and the large chamfered surface 4333 is connected to the end of the second arc surface 432 away from the center position.

[0049] Preferably, if Figure 8-12As shown, the projections of the first arc surface 431, the second arc surface 432 and the third arc surface 4332 on the horizontal plane are the first arc line, the second arc line and the third arc line respectively. In the same separation protrusion 43, the distance d1 between the point C on the third arc line at the longest distance to the rotation center X of the separation wheel seat 41 and the outer end point A of the first arc line is greater than the distance d2 between it and the outer end point B of the second arc line, and the distance d3 between the curvature center O of the third arc line and the outer end point A of the first arc line is less than the distance d4 between the curvature center O of the third arc line and the outer end point B of the second arc line.

[0050] In this embodiment, the point C on the third arc line with the longest distance from the rotation center X is actually the point on the third arc surface with the largest linear velocity. The distance d1 between the point C and the outer end point A of the first arc line is greater than the distance d2 between the point C and the outer end point B of the second arc line, that is, the point C is arranged close to the large chamfered surface 4333, so that the third arc surface 4332 on the outer side of each separation protrusion 43 forms a curvature peeling protrusion structure. When the material on the outer peripheral side of the separation wheel assembly 4 flows through the third arc surface 4332, the grinding medium and the large particle size Under the action of centrifugal force, the material particles are easily separated from the separation wheel assembly 4 at the point C in advance. Under the action of the Coanda effect, the small-size material flows in the form of a liquid film along the third arc surface 4332 toward the separation discharge channel 44, and flows out to the discharge area 42 through the separation discharge channel 44. The early separation of the grinding medium and the large-size material particles can effectively reduce the proportion of the grinding medium in the slurry entering the separation discharge channel 44, and effectively block the grinding medium on the outer peripheral side of the separation wheel assembly 4 from approaching the separation area, thereby realizing the grading and pre-separation functions. In addition, by setting the distance d3 between the center of curvature O of the third arc line and the outer end point A of the first arc line and the distance d4 between the center of curvature O of the third arc line and the outer end point B of the second arc line, the ratio of the arc length between the first arc surface 431 and the second arc surface 432 and the ratio of the curvature radius between the small chamfered surface 4331 and the large chamfered surface 4333 are limited. Specifically, the arc length of the first arc surface 431 is longer, which helps to provide a greater separation. Dynamic pressure, thereby improving the separation efficiency of the separation wheel assembly 4; the arc length of the second arc surface 432 is shorter, which helps to reduce the along-the-way resistance of the grinding slurry flowing out of the discharge area 42 and increase the outflow rate of the grinding slurry; the curvature radius of the large chamfered surface 4333 determines the maximum separation point position of the grinding medium flowing into the separation wheel assembly 4 at the outer end entrance of the separation discharge channel 44; the curvature radius of the small chamfered surface 4331 determines the film thickness size of the grinding slurry flowing in the form of a liquid film under the action of the Coanda effect at the outer end entrance of the separation discharge channel 44.

[0051] Preferably, if Figure 8-11As shown, a plurality of strip-shaped protrusions 47 are evenly arranged around the center position on the bottom surface of the separation wheel seat 41, and a second inclined plane 472 is arranged on the front side of each strip-shaped protrusion 47 along the rotation direction of the separation wheel seat 41, and a vertical plane 471 is arranged on the back side, the vertical plane 471 and the bottom surface of the separation wheel seat 41 are mutually perpendicular, and the vertical plane 471 is arranged at an angle with the radial direction of the separation wheel seat 41, and the second inclined plane 472 is arranged at an angle with the bottom surface of the separation wheel seat 41. In this embodiment, by arranging the strip-shaped protrusions 47, when the separation wheel assembly 4 rotates, along the rotation direction, the second inclined plane 472 of the strip-shaped protrusions 47 imparts radial and circumferential tangential velocity components to the grinding material and the grinding medium, thereby driving the grinding material and the grinding medium at the bottom of the grinding area to circulate inside the grinding cylinder 2, thereby increasing the collision frequency between the material and the grinding medium, that is, increasing the grinding efficiency, and avoiding the formation of a grinding dead zone at the bottom of the grinding cylinder 2.

[0052] Preferably, if Figure 8-11 As shown, a fixing ring 45 is provided in the discharge area 42, and a plurality of connecting through holes 46 are provided in the separation wheel seat 41 located inside the fixing ring 45; the separation protrusion 43 is detachably connected to the separation wheel seat 41. In this embodiment, by providing the fixing ring 45 and the connecting through holes 46 in the discharge area 42, it is convenient to fix an external discharge mechanism, such as the spindle 6, in the discharge area 42, so that the grinding slurry flowing from the separation discharge channel 44 to the discharge area 42 is discharged from the external discharge mechanism. Furthermore, by providing a detachable connection between the separation protrusion 43 and the separation wheel seat 41, on the one hand, the separation wheel seat 41 and the separation protrusion 43 can be processed separately, which greatly reduces the processing difficulty of the separation wheel assembly 4; on the other hand, since the separation protrusion 43 will collide with the grinding medium, it is easy to cause the separation protrusion 43 to wear; when a certain separation protrusion 43 is worn, it is only necessary to replace the separation protrusion 43, and there is no need to replace the separation wheel assembly 4 as a whole, thereby extending the service life of the entire separation wheel assembly 4 and reducing production costs.

[0053] In this embodiment, the grinding rotor 3 and the separation wheel assembly 4 arranged therein cooperate to grind and separate the grinding material. The specific grinding and separation mechanism is as follows: the grinding material and the grinding medium are given velocity components along the rotation circumferential and vertical directions of the grinding rotor 3 under the action of the grinding rod block 32 provided with the first inclined plane 320, and the grinding medium and the grinding material located at the bottom of the grinding inner cavity 31 are given radial and circumferential tangential velocity components under the action of the strip-shaped propulsion protrusion 47 of the separation wheel assembly 4. In this way, the grinding material is ground and crushed under the action of collision, extrusion and friction shear between the grinding media and between the grinding media and the grinding cylinder 2; in addition, the bottom area of ​​the grinding cylinder 2 intersects with the grinding media and grinding materials in other areas, which intensifies the frequency of collision and extrusion between the grinding media, thereby intensifying the turbulence of the grinding slurry and breaking it into many small-scale and dense vortices. The grinding material is evenly dispersed under the action of turbulence and vortex, which helps to improve the uniformity of grinding. Furthermore, the grinding media and larger particle size grinding materials located in the middle area of ​​the grinding rotor 3 and the separation wheel assembly 4 are peeled off by the curvature peeling protrusion structure on the outside of the separation protrusion 43 and the centrifugal force, and then flow to the outer peripheral side of the grinding rotor 3 under the action of the anisotropic variable diameter channel 33 to form a local circulation. The small particle size materials flow out to the discharge area 42 through the separation discharge channel 44 in the form of liquid film under the action of the Coanda effect, thereby realizing the classification and pre-separation functions. Therefore, during the grinding process, the grinding medium forms a multi-stage local circulation under the action of the specially designed grinding rod block 32, the strip-shaped propulsion block 47 and the anisotropic variable diameter channel 33, thereby eliminating the grinding dead zone. The ground material forms a two-stage classification under the action of the intersecting vortex and the curvature peeling protrusion structure, and forms a three-stage separation under the action of the anisotropic variable diameter channel 33, the curvature peeling protrusion structure and the separation and discharge channel 44, thereby greatly improving the grinding efficiency and the grinding uniformity. The specially designed grinding rotor 3 makes the grinding action on the ground material mainly friction shearing, supplemented by collision extrusion, thereby making the grinding action on the ground material softer and effectively improving the concentration of the particle size distribution of the material after grinding.

[0054] Preferably, if Figure 5 , 12-13, it also includes a discharge barrel 7, the top end of the spindle 6 extends to the inside of the discharge barrel 7, the top end of the spindle discharge channel 61 passes through the top wall of the spindle 6 to communicate with the inside of the discharge barrel 7, and the bottom of the spindle 6 is provided with a plurality of discharge connection channels 62 connected with the spindle discharge channel 61 along the outer peripheral side of the spindle discharge channel 61, and the ends of the plurality of discharge connection channels 62 away from the spindle discharge channel 61 are respectively extended downwardly at an angle relative to the central axis of the spindle 6 and pass through the side wall of the spindle 6, and the projections of the plurality of discharge connection channels 62 on the horizontal plane are arranged at an angle with the radial direction of the spindle 6. Specifically, a discharge through hole 71 is provided on the side wall of the discharge barrel 7.

[0055] In this embodiment, 3-4 discharge connecting channels 62 are evenly arranged around the side wall of the main shaft 6, and the grinding slurry flowing to the discharge area 42 of the separation wheel assembly 4 can enter the main shaft discharge channel 61 through a plurality of discharge connecting channels 62, thereby increasing the discharge rate of the grinding slurry; and a plurality of discharge connecting channels 62 are arranged upwardly with respect to the main shaft discharge channel 61, which helps to increase the resistance of the grinding medium entering the main shaft discharge channel 61 from the discharge connecting channel 62 compared to the horizontally arranged discharge connecting channel, further reduces the probability of the grinding medium entering the main shaft discharge channel 61, and facilitates the grinding medium to fall back from the discharge connecting channel 62 to the separation wheel assembly 4 under the action of gravity, thereby further improving the separation effect between the grinding slurry and the grinding medium. In addition, when the vertical nano sand mill is started, since part of the grinding medium may flow into the discharge connecting channel 62 and the main shaft discharge channel 61, after the machine is started, the material and the grinding medium will be given a rotational circumferential velocity component when flowing through the discharge connecting channel 62, and fall back into the separation wheel assembly 4 under the action of drag and gravity, thereby avoiding the occurrence of ball running during the startup condition.

[0056] Preferably, if Figure 12-13As shown, the spindle discharge channel 61 includes a large diameter section 611, a transition section 612 and a small diameter section 613 from top to bottom; a pressure sensor 11 is provided at the top of the discharge barrel 7, and the detection end of the pressure sensor 11 passes through the top of the discharge barrel 7 and extends to the inside of the large diameter section 611. In this embodiment, by providing the transition section 612 and the large diameter section 611 near the outlet position of the spindle discharge channel 61, on the one hand, it is convenient to provide an installation space for the detection end of the pressure sensor 11, and the pressure sensor 11 is used to detect the pressure in the spindle discharge channel 61 in real time; on the other hand, the inner diameter of the transition section 612 gradually increases relative to the inner diameter of the small diameter section 613. When the inner diameter increases, the flow speed of the grinding slurry slows down, thereby increasing the viscous resistance of the grinding medium that rises with the grinding slurry, reducing the movement speed of the grinding medium, so that the grinding medium is more likely to fall back under the action of its own gravity, further effectively reducing the possibility of the grinding medium being discharged outward.

[0057] Preferably, if Fig.12 and 13 As shown, a baffle 8 is fixed to the top of the main shaft 6, and a baffle through hole 81 connected to the main shaft discharge channel 61 is opened in the middle of the baffle 8, and the inner diameter of the baffle through hole 81 decreases from bottom to top. Specifically, the inner diameter of the lower end of the baffle through hole 81 is the same as the inner diameter of the upper end of the large diameter section 611, while the inner diameter of the upper end of the baffle through hole 81 is smaller than the inner diameter of the lower end of the baffle through hole 81, so that the inner wall of the baffle through hole 81 is inclined from the outside to the inside. When a small amount of grinding medium enters the spindle discharge channel 61, most of the grinding medium falls to the bottom of the spindle discharge channel 61 under the action of its own gravity, and falls back to the separation wheel assembly 4 through the discharge connecting channel 62, while a very small number of grinding media will spirally rise along the side wall of the spindle discharge channel 61 to the top of the spindle discharge channel 61 under the rotation of the spindle 6. At this time, the inclined inner wall of the baffle through hole 81 of the baffle 8 can effectively block this part of the grinding medium, preventing the grinding medium from leaving the spindle discharge channel 61 and entering the discharge barrel 7, thereby realizing the complete separation of the grinding slurry and the grinding medium, and eliminating the possibility of the grinding medium being discharged outward.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A grinding rotor, characterized in that: The grinding rotor (3) comprises a top wall (34) and a side wall (35) connected to the outer edge of the top wall (34); the side wall (35) is cylindrical; a grinding inner cavity (31) is provided inside the grinding rotor (3); a plurality of grinding rod blocks (32) are arranged on the outer peripheral side of the side wall (35); the cross-sectional area of ​​the grinding rod blocks (32) decreases from the inside to the outside along the radial direction of the grinding rotor (3); at least part of the grinding rod blocks (32) decreases along the rotation direction of the grinding rotor (3); A first inclined plane (320) is arranged on the front side of the housing, and the first inclined plane (320) is arranged at an angle with the horizontal plane; a plurality of different-direction variable-diameter channels (33) are arranged through the side wall (35), each of the different-direction variable-diameter channels (33) is gradually contracted from the inside to the outside, and each of the different-direction variable-diameter channels (33) comprises a top surface (331), a first side surface (332), a bottom surface (333) and a second side surface (334) connected in sequence, and the top surface (331) and the bottom surface (333) are arranged at an angle.

2. A grinding rotor according to claim 1, characterized in that: The first side surface (332) and the second side surface (334) in the different-direction variable-diameter channel (33) are arranged in parallel, and a projection of the first side surface (332) on a horizontal plane forms an angle with a radial direction of the side wall (35).

3. A grinding rotor according to claim 1, characterized in that: The grinding rod blocks (32) are evenly arranged in multiple rows on the outer peripheral side of the side wall (35), each row of the grinding rod blocks (32) is arranged between two adjacent different-direction variable-diameter channels (33), and each row of the grinding rod blocks (32) includes an upper rod block (321), at least one middle rod block (322), and a lower rod block (323) which are arranged in sequence from top to bottom.

4. A grinding rotor according to claim 3, characterized in that: Each of the grinding rod blocks (32) is provided with the first inclined plane (320) on the front side along the rotation direction of the grinding rotor (3), and each of the first inclined planes (320) is arranged downward.

5. A grinding rotor according to claim 3, characterized in that: Each of the grinding rod blocks (32) is provided with the first inclined plane (320) on the front side along the rotation direction of the grinding rotor (3); the first inclined plane (320) of each of the upper rod blocks (321) is arranged downward; the first inclined plane (320) of each of the lower rod blocks (323) is arranged upward; the first inclined plane (320) of the middle rod blocks (322) is arranged upward or downward; when the number of the middle rod blocks (322) in each row of the grinding rod blocks (32) is only When the number of the middle rod blocks (322) in each row of the grinding rod blocks (32) is greater than one, the middle rod blocks (322) with the first inclined plane (320) facing upward and the middle rod blocks (322) with the first inclined plane (320) facing downward are arranged alternately in the circumferential direction; when the number of the middle rod blocks (322) in each row of the grinding rod blocks (32) is greater than one, the middle rod blocks (322) with the first inclined plane (320) facing upward and the middle rod blocks (322) with the first inclined plane (320) facing downward are arranged alternately in the circumferential direction and also arranged alternately in the vertical direction.

6. A grinding rotor according to claim 3, characterized in that: Each of the upper rod blocks (321) and each of the lower rod blocks (323) is provided with the first inclined plane (320) on the front side along the rotation direction of the grinding rotor (3); the first inclined plane (320) of each of the upper rod blocks (321) is arranged downward, and the first inclined plane (320) of each of the lower rod blocks (323) is arranged upward; and each of the middle rod blocks (322) is provided with an arc surface (324) on the front side along the rotation direction of the grinding rotor (3).

7. A vertical nano sand mill, characterized in that: The vertical nano-sand mill has a grinding rotor (3) as claimed in any one of claims 1 to 6, and further comprises a frame (10), a grinding cylinder (2), a separating wheel assembly (4), a driving mechanism (5) and a main shaft (6), wherein the driving mechanism (5) and the main shaft (6) are both arranged on the frame (10), and the driving mechanism (5) is used to drive the main shaft (6) to rotate relative to the frame (10); the grinding rotor (3) is arranged inside the grinding cylinder (2), and the separating wheel assembly (4) is arranged in the grinding inner cavity (31); the separating wheel assembly (4) comprises a separating wheel seat (41), the center position of the top of the separating wheel seat (41) is a discharging area (42), and the top of the separating wheel seat (41) is A plurality of separation protrusions (43) are evenly arranged around the discharge area (42), and a separation discharge channel (44) connected to the discharge area (42) is formed between adjacent separation protrusions (43); the separation discharge channel (44) is curved, and the separation discharge channel (44) gradually expands from the outside to the inside; a main shaft discharge channel (61) is provided inside the main shaft (6); the bottom end of the main shaft (6) passes through the top of the grinding cylinder (2), the top wall (34) of the grinding rotor (3) in sequence, and extends to the discharge area (42) of the separation wheel assembly (4); the main shaft discharge channel (61) is connected to the discharge area (42); the grinding rotor (3) and the separation wheel assembly (4) both rotate synchronously with the main shaft (6).

8. A vertical nano sand mill according to claim 7, characterized in that: The separation protrusion (43) comprises a first arcuate surface (431), a second arcuate surface (432) and a connecting curved surface (433) which are connected in sequence, wherein the first arcuate surface (431) and the second arcuate surface (432) extend respectively along the direction from the center position to the edge position of the separation wheel seat (41), and the connecting curved surface (433) is close to the edge position of the separation wheel seat (41); along the rotation direction of the separation wheel seat (41), the second arcuate surface (432) in one separation protrusion (43) is connected to the second arcuate surface (432) in the next separation protrusion (43). The separation discharge channel (44) is formed between the first arcuate surfaces (431) in the separation protrusions (43); along the rotation direction of the separation wheel seat (41), the connecting curved surface (433) sequentially includes a small chamfered surface (4331), a third arcuate surface (4332) and a large chamfered surface (4333), the small chamfered surface (4331) is connected to an end of the first arcuate surface (431) away from the center position, and the large chamfered surface (4333) is connected to an end of the second arcuate surface (432) away from the center position.

9. A vertical nano sand mill according to claim 8, characterized in that: The projections of the first arc surface (431), the second arc surface (432) and the third arc surface (4332) on the horizontal plane are respectively the first arc line, the second arc line and the third arc line; in the same separation protrusion (43), the distance (d1) between the point (C) on the third arc line with the longest distance to the rotation center (X) of the separation wheel seat (41) and the outer end point (A) of the first arc line is greater than the distance (d2) between it and the outer end point (B) of the second arc line, and the distance (d3) between the center point (O) of the curvature of the third arc line and the outer end point (A) of the first arc line is less than the distance (d4) between the center point (O) of the curvature of the third arc line and the outer end point (B) of the second arc line.

10. A vertical nano sand mill according to claim 7, characterized in that: The bottom surface of the separation wheel seat (41) is evenly provided with a plurality of strip-shaped propulsion protrusions (47) around a central position, and along the rotation direction of the separation wheel seat (41), a second inclined plane (472) is provided on the front side of each strip-shaped propulsion protrusion (47), and a vertical plane (471) is provided on the back side, the vertical plane (471) and the bottom surface of the separation wheel seat (41) are perpendicular to each other, and the vertical plane (471) and the radial direction of the separation wheel seat (41) are arranged at an angle, and the second inclined plane (472) and the bottom surface of the separation wheel seat (41) are arranged at an angle.

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