An abrasive segment for improving grinding quality

Abstract

The utility model discloses an improve and grind quality's abrasive disc, including abrasive disc base body, abrasive disc base body includes the pulp inlet end and pulp outlet end, the upper surface of abrasive disc base body is equipped with first grinding part and second grinding part, third grinding part, first grinding part, second grinding part and third grinding part all have coarse grinding area and fine grinding area in turn from the pulp inlet end to the pulp outlet end, the included angle a between the extension direction of first grinding part and the extension direction of second grinding part is 6 15 DEG, the included angle b between the extension direction of third grinding part and the extension direction of first grinding part is equal with a. Through setting the extension direction of first grinding part and second grinding part into certain included angle, the traditional abrasive disc single direction's shearing flow field is broken. When the slurry flows through the abrasive disc surface, will receive the shearing force and the kneading action from different directions in turn, can more uniform, more thorough grinding to the slurry.

Description

Technical Field

[0001] This utility model relates to the field of grinding device technology, and in particular to a grinding disc for improving grinding quality. Background Technology

[0002] Grinding discs are key components of grinding equipment widely used in industries such as papermaking, metallurgy, and food processing. They are primarily used for grinding and refining slurries and granules. Traditional grinding discs typically employ a disc-shaped structure, composed of multiple fan-shaped grinding disc substrates. The substrates are designed with grinding zones, including coarse and fine grinding zones, using a toothed groove structure to crush and refine the material. During the grinding process, the slurry flows from the inlet to the outlet, undergoing progressive processing through the coarse and fine grinding zones to achieve the desired fineness and uniformity.

[0003] In existing technologies, the grinding sections on the grinding disc substrate typically extend in a uniform direction, meaning that the arrangement of each grinding section is parallel to each other or radially distributed. For example, in some conventional grinding disc designs, the extension direction of the grinding grooves is consistent with the radial direction of the grinding disc. While this layout is structurally simple, it easily leads to a single flow path for the slurry during grinding, resulting in insufficient uniformity of the grinding action. Specifically, when the slurry flows through the grinding zone, the overly uniform direction of the grinding force may cause some areas to be over-ground while others are under-ground, thus affecting the overall grinding quality. Furthermore, this design is also prone to problems such as slurry blockage, increased energy consumption, and uneven wear of the grinding disc.

[0004] To improve grinding performance, some improvements have been made in existing technologies, such as optimizing slurry flow by adjusting the density, depth, or shape of the tooth grooves. However, these solutions often fail to fully consider the influence of the extension direction of the grinding section on grinding kinetics. In particular, when multiple grinding sections are arranged on the grinding disc substrate, if their extension directions are the same, the grinding action still lacks multi-dimensional shearing and extrusion effects, limiting the thorough mixing and refinement of the slurry.

[0005] Therefore, there is an urgent need in the field for a new type of grinding disc design that can enhance the uniformity and efficiency of grinding by optimizing the spatial layout of the grinding section, especially by changing the extension direction of the grinding section.

[0006] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0007] This invention overcomes the shortcomings of the prior art and provides a grinding disc that improves grinding quality.

[0008] This utility model is achieved through the following technical solution:

[0009] A grinding disc for improving grinding quality includes a fan-shaped grinding disc base. Multiple grinding disc bases can be assembled into a disc-shaped grinding structure. The grinding disc base includes an inlet end and an outlet end. The upper surface of the grinding disc base is provided with a first grinding section and a second grinding section. The upper surface of the grinding disc base is also provided with a third grinding section that is assembled with the second grinding section on another grinding disc base. The first grinding section, the second grinding section, and the third grinding section are arranged sequentially from the inlet end to the outlet end with a coarse grinding zone and a fine grinding zone. The coarse grinding zone has a plurality of spaced coarse grinding teeth, and a coarse grinding groove is formed between two adjacent coarse grinding teeth. The fine grinding zone has a plurality of... The grinding teeth are arranged at intervals, and a first grinding groove is formed between two adjacent grinding teeth. A second grinding groove is provided on each grinding tooth from front to back. The width of the first grinding groove is greater than that of the second grinding groove. Several first exposed blocks and first concealed blocks are staggered along the extension direction of the first grinding groove. The top of the first exposed block is level with the top of the grinding tooth, and the top of the first concealed block is lower than the top of the grinding tooth. The angle α between the extension direction of the first grinding part and the extension direction of the second grinding part is 6°-15°. The angle b between the extension direction of the third grinding part and the extension direction of the first grinding part is equal to α.

[0010] As described above, in a grinding disc for improving grinding quality, the second grinding section is located to the right of the first grinding section, and the third grinding section is located to the left of the first grinding section.

[0011] As described above, in a grinding disc for improving grinding quality, the extension direction of the fine grinding teeth in the first grinding part is inclined from front to back to the right relative to the radial direction of the first grinding part, and the extension direction of the fine grinding teeth in the second grinding part is inclined from front to back to the right relative to the radial direction of the second grinding part.

[0012] As described above, in a grinding disc for improving grinding quality, the extension direction of the fine grinding teeth in the second grinding section is parallel to the left side of the grinding disc substrate, and the extension direction of the fine grinding teeth in the third grinding section is parallel to the right side of the grinding disc substrate.

[0013] As described above, in a grinding disc for improving grinding quality, the first hidden stop in the first fine grinding groove is not on the same arc line as the first hidden stop in the adjacent first fine grinding groove, and the first exposed stop in the first fine grinding groove is not on the same arc line as the first exposed stop in the adjacent first fine grinding groove.

[0014] As described above, in a grinding disc for improving grinding quality, a plurality of second visible blocks and second concealed blocks are staggered along the extension direction of the second fine grinding groove. The top of the second visible block is level with the top of the fine grinding teeth, and the top of the second concealed block is lower than the top of the fine grinding teeth. The second visible blocks in the second fine grinding groove are not on the same arc line as the second visible blocks in the adjacent second fine grinding groove, and the second concealed blocks in the second fine grinding groove are not on the same arc line as the second concealed blocks in the adjacent second fine grinding groove.

[0015] As described above, in a grinding disc for improving grinding quality, the width of the coarse grinding groove is greater than the width of the first fine grinding groove. The coarse grinding groove is provided with a plurality of third hidden blocks. The top of the third hidden blocks is lower than the top of the coarse grinding teeth. The third hidden blocks in the coarse grinding groove are not on the same arc line as the third hidden blocks in the adjacent coarse grinding groove.

[0016] As described above, in a grinding disc for improving grinding quality, the front sides of the first exposed block, the second exposed block, the first concealed block, the second concealed block, and the third concealed block are all provided with guide slopes.

[0017] As described above, in a grinding disc for improving grinding quality, the angle between the guide slope and the bottom of the groove is 15°-45°.

[0018] As described above, in a grinding disc for improving grinding quality, the depth of the first fine grinding groove is greater than the depth of the second fine grinding groove.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. Significantly improves grinding quality, ensuring uniform and fine slurry. By setting the extension directions of the first and second grinding sections at a certain angle, the traditional single-direction shear flow field of grinding discs is broken. When the slurry flows over the surface of the grinding discs, it is subjected to shear forces and kneading effects from different directions in sequence. This multi-dimensional and three-dimensional grinding method can grind the slurry more uniformly and thoroughly, effectively avoiding the problem of "over-processing" and "under-processing" of the slurry caused by single-direction grinding, thereby greatly improving the uniformity and stability of the slurry quality.

[0021] 2. Optimized flow field and reduced ineffective energy consumption: The angle between the grinding sections effectively extends the grinding path of the slurry on the grinding plate surface, increasing the contact and interaction time between the slurry and the grinding teeth. This means that to achieve the same grinding effect, the drive power of the grinder can be appropriately reduced or the grinding time shortened, thereby directly reducing the energy consumption per unit output and achieving significant energy savings.

[0022] 3. The staggered arrangement of the first exposed baffle and the first concealed baffle within the fine grinding tank constitutes a highly efficient energy management unit. The first exposed baffle primarily serves to block and generate turbulence, thereby increasing the residence time of the slurry at the grinding teeth and improving grinding quality. Meanwhile, the first concealed baffle, whose top is lower than the fine grinding teeth, can create micro-disturbances at the bottom of the slurry without significantly increasing flow resistance, preventing fiber deposition and clogging. This "combination of exposed and concealed baffles" layout ensures excellent fine grinding results while minimizing unnecessary flow pressure loss, further contributing to energy-saving benefits. Attached Figure Description

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a top view of the present invention;

[0026] Figure 3 This is a schematic diagram of the end face of this utility model;

[0027] Figure 4 yes Figure 2 A schematic diagram of a cross-section taken along section line AA;

[0028] Figure 5 yes Figure 2 Enlarged view of point B in the middle;

[0029] Figure 6 yes Figure 2 Enlarged view of point C in the middle;

[0030] Figure 7 yes Figure 2 Enlarged diagram of point D in the middle. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] like Figures 1 to 7The grinding disc shown includes a fan-shaped grinding disc base 1. Multiple grinding disc bases 1 can be assembled into a disc-shaped grinding structure. The grinding disc base 1 includes an inlet end 11 and an outlet end 12. The upper surface of the grinding disc base 1 is provided with a first grinding section 2 and a second grinding section 3. The upper surface of the grinding disc base 1 is also provided with a third grinding section 4 that is assembled with the second grinding section 3 on another grinding disc base 1. The first grinding section 2, the second grinding section 3, and the third grinding section 4 are all arranged sequentially from the inlet end 11 to the outlet end 12 with a coarse grinding zone 5 and a fine grinding zone 6. The coarse grinding zone 5 is provided with a plurality of spaced coarse grinding teeth 51, and a coarse grinding groove 52 is formed between two adjacent coarse grinding teeth 51. The fine grinding zone 6 is provided with a plurality of... The grinding teeth 61 are arranged at intervals, and a first grinding groove 62 is formed between two adjacent grinding teeth 61. A second grinding groove 63 is provided on the grinding teeth 61, which runs through them from front to back. The groove width of the first grinding groove 62 is greater than that of the second grinding groove 63. A plurality of first exposed blocks 71 and first concealed blocks 72 are staggered along the extension direction of the first grinding groove 62. The top of the first exposed block 71 is level with the top of the grinding tooth 61, and the top of the first concealed block 72 is lower than the top of the grinding tooth 61. The angle α between the extension direction P of the first grinding part 2 and the extension direction F of the second grinding part 3 is 6°-15°. The angle b between the extension direction S of the third grinding part 4 and the extension direction P of the first grinding part 2 is equal to α.

[0033] This invention breaks the traditional single-direction shear flow field of grinding discs by setting the extension direction P of the first grinding part 2 and the extension direction F of the second grinding part 3 at a certain angle. This allows the slurry to be subjected to shear forces and kneading effects in different directions as it flows over the surface of the grinding disc, forming a multi-dimensional and three-dimensional grinding method. This effectively avoids the problems of local "over-grinding" or "under-grinding," significantly improving the uniformity, fineness, and stability of the slurry quality. At the same time, this angled design extends the effective grinding path of the slurry on the grinding disc and increases the contact time between the slurry and the grinding teeth. While ensuring the grinding effect, it can reduce the driving power or shorten the grinding time, thereby effectively reducing the energy consumption per unit output and achieving energy-saving operation. Furthermore, the staggered arrangement of the first exposed baffle 71 and the first concealed baffle 72 within the first fine grinding tank 62 constitutes a highly efficient energy management unit: the first exposed baffle 71 primarily serves to block the slurry and generate strong turbulence, thereby increasing the residence time of the slurry at the grinding teeth to enhance the grinding effect, while the first concealed baffle 72, without significantly increasing flow resistance, generates micro-disturbances on the bottom layer of the slurry, preventing fiber deposition and clogging. This "combination of exposed and concealed baffles" layout, while enhancing the fine grinding effect, minimizes unnecessary pressure loss, further improving the system's energy efficiency and achieving synergistic optimization of high-quality grinding and low-energy operation.

[0034] Further, the second grinding part 3 is located on the right side of the first grinding part 2, and the third grinding part 4 is located on the left side of the first grinding part 2. The extension direction P of the fine grinding teeth 61 in the first grinding part 2 is inclined from front to back to the right relative to the radial direction P1 of the first grinding part 2. The extension direction F of the fine grinding teeth 61 in the second grinding part 3 is inclined from front to back to the right relative to the radial direction F1 of the second grinding part 3. The extension direction S of the fine grinding teeth 61 in the first grinding part 2 is inclined from front to back to the right relative to the radial direction S1 of the first grinding part 2. The extension direction F of the fine grinding teeth 61 in the second grinding part 3 is parallel to the left side of the grinding disc substrate 1, and the extension direction S of the fine grinding teeth 61 in the third grinding part 4 is parallel to the right side of the grinding disc substrate 1.

[0035] When multiple fan-shaped grinding discs are assembled into a complete disc and rotate at high speed, the slurry moves from the inlet end 11 to the outlet end 12 under the action of centrifugal force. At this time, the fine grinding teeth 61, which are uniformly inclined to the right on all grinding sections, provide a unified tangential guiding force for the slurry flow that is coordinated with the rotation direction of the grinding discs. At the same time, a smooth transition "convergence channel" is created at the junction of adjacent grinding discs 1, instead of creating turbulence or stagnation at the joint, thereby ensuring the continuity and efficiency of the slurry flow across the entire grinding disc surface, reducing ineffective path circulation, and directly improving the discharge efficiency and overall processing capacity. The tooth inclination matches the rotation direction, conforming to the natural flow trend of the slurry under the action of centrifugal force and Coriolis force, reducing the frontal impact and frictional resistance between the slurry and the tooth groove side, and reducing the torque required to drive the grinding discs to rotate in the refiner, thus achieving significant energy savings while achieving the same grinding effect.

[0036] Furthermore, the first concealed block 72 in the first fine grinding groove 62 is not on the same arc line as the first concealed block 72 in the adjacent first fine grinding groove 62, and the first exposed block 71 in the first fine grinding groove 62 is not on the same arc line as the first exposed block 71 in the adjacent first fine grinding groove 62.

[0037] If all the first exposed barriers 71 and the first concealed barriers 72 are on the same arc, a periodic "barrier wall" will be formed. The slurry flow needs to cross these barriers as a whole, causing the slurry in different first grinding tanks 62 to undergo almost the same processing, which easily leads to slurry blockage. The staggered layout completely breaks this periodicity, so that the timing of the obstruction and disturbance encountered by the slurry in adjacent first grinding tanks 62 on any arc is different. This divides the overall grinding area into countless tiny, independent turbulent units. The slurry fibers no longer pass through in a neat "laminar flow" form, but are constantly divided, merged, turned, and tumbled in the intricate labyrinth of barriers. This ensures that each fiber has a very high probability of being subjected to sufficient shearing and kneading from different directions, thereby achieving extremely high uniformity of fiber brooming and greatly improving the quality of the slurry.

[0038] Furthermore, within the second fine grinding groove 63, a plurality of second exposed baffles 73 and second concealed baffles 74 are staggered along its extending direction. The top of the second exposed baffles 73 is flush with the top of the fine grinding teeth 61, and the top of the second concealed baffles 74 is lower than the top of the fine grinding teeth 61. The second exposed baffles 73 within the second fine grinding groove 63 are not on the same arc as the second exposed baffles 73 in adjacent second fine grinding grooves 63, and the second concealed baffles 74 within the second fine grinding groove 63 are not on the same arc as the second concealed baffles 74 in adjacent second fine grinding grooves 63. This arrangement serves the same purpose as the aforementioned arrangement of the first exposed baffles 71 and the first concealed baffles 72.

[0039] In one embodiment, the width of the coarse grinding groove 52 is greater than the width of the first fine grinding groove 62. The coarse grinding groove 52 is provided with a plurality of third hidden blocks 75, the top of which is lower than the top of the coarse grinding teeth 51. The third hidden blocks 75 in the coarse grinding groove 52 are not on the same arc line as the third hidden blocks 75 in adjacent coarse grinding grooves 52. This prevents the slurry from clogging and improves the grinding quality.

[0040] In one embodiment, the front sides of the first exposed barrier 71, the second exposed barrier 73, the first concealed barrier 72, the second concealed barrier 74, and the third concealed barrier 75 are all provided with guide slopes 8. The angle between the guide slopes 8 and the bottom of the groove is 15°-45°.

[0041] When the slurry comes into contact with the dam, it is smoothly guided upwards along the guide ramp 8, reducing the flow resistance of the slurry as it passes through the dam, thus achieving energy saving and consumption reduction. If the included angle is too small, the ramp will be very gentle. An overly gentle guide ramp 8 has an insignificant "guiding" effect, resulting in a poorer lifting and diversion effect on the slurry, weakening its original design purpose of creating complex microturbulence. If the included angle is too large, the ramp will become steep, and its advantages will gradually disappear. A steep ramp will reintroduce a larger frontal impact force, increasing the flow resistance and reducing the energy-saving effect.

[0042] In one embodiment, the depth of the first fine grinding groove 62 is greater than the depth of the second fine grinding groove 63. The deeper and wider first fine grinding groove 62 means a larger slurry capacity and a smoother slurry channel. This allows the first fine grinding groove 62 to efficiently receive the initially crushed slurry from the coarse grinding zone and perform preliminary fine grinding and flow distribution on it. The smaller and shallower second fine grinding groove 63 means that the slurry makes closer and more frequent contact with the grinding teeth 62 as it flows here, thereby increasing the grinding quality of the slurry.

Claims

1. A grinding disc for improving grinding quality, characterized in that: The grinding disc includes a fan-shaped grinding disc substrate (1), and multiple grinding disc substrates (1) can be assembled into a disc-shaped grinding structure. The grinding disc substrate (1) includes an inlet end (11) and an outlet end (12). The upper surface of the grinding disc substrate (1) is provided with a first grinding part (2) and a second grinding part (3). The upper surface of the grinding disc substrate (1) is also provided with a third grinding part (4) that is assembled with the second grinding part (3) on another grinding disc substrate (1). The first grinding part (2), the second grinding part (3) and the third grinding part (4) are arranged in a coarse grinding area (5) and a fine grinding area (6) from the inlet end (11) to the outlet end (12). The coarse grinding area (5) is provided with a number of spaced coarse grinding teeth (51), and a coarse grinding groove (52) is formed between two adjacent coarse grinding teeth (51). The fine grinding area (6) is provided with a number of... The grinding teeth (61) are arranged at intervals, and a first grinding groove (62) is formed between two adjacent grinding teeth (61). The grinding teeth (61) are provided with a second grinding groove (63) that runs through them from front to back. The groove width of the first grinding groove (62) is greater than that of the second grinding groove (63). Several first exposed blocks (71) and first concealed blocks (72) are staggered along their extension direction in the first grinding groove (62). The top of the first exposed block (71) is level with the top of the grinding teeth (61), and the top of the first concealed block (72) is lower than the top of the grinding teeth (61). The angle α between the extension direction of the first grinding part (2) and the extension direction of the second grinding part (3) is 6°-15°. The angle b between the extension direction of the third grinding part (4) and the extension direction of the first grinding part (2) is equal to α.

2. The grinding disc for improving grinding quality according to claim 1, characterized in that: The second grinding part (3) is located on the right side of the first grinding part (2), and the third grinding part (4) is located on the left side of the first grinding part (2).

3. The grinding disc for improving grinding quality according to claim 2, characterized in that: The extension direction of the fine grinding teeth (61) in the first grinding part (2) is inclined from front to back to the right relative to the radial direction of the first grinding part (2), and the extension direction of the fine grinding teeth (61) in the second grinding part (3) is inclined from front to back to the right relative to the radial direction of the second grinding part (3).

4. A grinding disc for improving grinding quality according to claim 3, characterized in that: The extension direction of the fine grinding teeth (61) in the second grinding part (3) is parallel to the left side of the grinding plate substrate (1), and the extension direction of the fine grinding teeth (61) in the third grinding part (4) is parallel to the right side of the grinding plate substrate (1).

5. A grinding disc for improving grinding quality according to claim 4, characterized in that: The first hidden block (72) in the first fine grinding groove (62) is not on the same arc as the first hidden block (72) in the adjacent first fine grinding groove (62), and the first exposed block (71) in the first fine grinding groove (62) is not on the same arc as the first exposed block (71) in the adjacent first fine grinding groove (62).

6. A grinding disc for improving grinding quality according to claim 5, characterized in that: The second fine grinding groove (63) is provided with a plurality of second exposed blocks (73) and second concealed blocks (74) interlaced along its extension direction. The top of the second exposed block (73) is level with the top of the fine grinding tooth (61), and the top of the second concealed block (74) is lower than the top of the fine grinding tooth (61). The second exposed block (73) in the second fine grinding groove (63) is not on the same arc as the second exposed block (73) in the adjacent second fine grinding groove (63), and the second concealed block (74) in the second fine grinding groove (63) is not on the same arc as the second concealed block (74) in the adjacent second fine grinding groove (63).

7. A grinding disc for improving grinding quality according to claim 6, characterized in that: The width of the coarse grinding groove (52) is greater than the width of the first fine grinding groove (62). The coarse grinding groove (52) is provided with a number of third hidden blocks (75). The top of the third hidden block (75) is lower than the top of the coarse grinding tooth (51). The third hidden block (75) in the coarse grinding groove (52) is not on the same arc as the third hidden block (75) in the adjacent coarse grinding groove (52).

8. A grinding disc for improving grinding quality according to claim 7, characterized in that: The front sides of the first exposed barrier (71), the second exposed barrier (73), the first concealed barrier (72), the second concealed barrier (74), and the third concealed barrier (75) are all provided with guide slopes (8).

9. A grinding disc for improving grinding quality according to claim 8, characterized in that: The angle between the guide slope (8) and the bottom of the groove is 15°-45°.

10. A grinding disc for improving grinding quality according to claim 1, characterized in that: The depth of the first fine grinding groove (62) is greater than the depth of the second fine grinding groove (63).

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