Grinding device

Abstract

The utility model discloses a grinding device which comprises a base. The rotating assembly is rotationally installed on the base and comprises a rotating shaft, grinding discs and spacer bushes, the grinding discs and the spacer bushes are installed on the rotating shaft in a transmission mode, the multiple grinding discs are arranged at intervals in the axial direction of the rotating shaft, the spacer bushes are arranged between every two adjacent grinding discs, and stirring parts are arranged on the outer side walls of the spacer bushes; and the grinding disc and the spacer bush rotate synchronously with the rotating shaft. The fluidity and dispersity of the horizontal sand mill in the grinding process can be improved, and the grinding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mills, and particularly relates to a grinding device. Background Art

[0002] As an efficient wet dispersion device, the horizontal sand mill is widely used in industries such as coatings, inks, pigments, and cosmetics. One of its core components is the grinding shaft assembly. The grinding shaft assembly usually consists of a series of grinding discs and spacers arranged axially. Among them, the grinding discs are responsible for crushing and refining the materials. The grinding discs are arranged at a certain distance. When the grinding discs rotate, they play a role in distributing and agitating the grinding beads (such as zirconium beads).

[0003] However, the spacer design in traditional horizontal sand mills has certain limitations. In the prior art, most spacers are designed as hollow ring structures, and their outer surfaces are usually smooth without features. Although this design can meet the basic isolation function, in the actual production process, the spacers cannot agitate the grinding beads. When the grinding beads agglomerate after long-term operation, it will not only reduce their fluidity in the grinding chamber, but also may cause the accumulation of grinding beads between the grinding discs, especially in the areas where the gaps between two grinding discs are small. This accumulation will not only hinder the normal flow of materials, but also significantly reduce the grinding efficiency, and even cause equipment overload and shorten the service life of the equipment. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a grinding device, which can improve the fluidity and dispersion during the grinding process of the horizontal sand mill and improve the grinding efficiency.

[0005] A grinding device according to an embodiment of the first aspect of the utility model includes:

[0006] A base;

[0007] A rotating assembly rotatably installed on the base. The rotating assembly includes a rotating shaft, grinding discs and spacers. The grinding discs and the spacers are drivingly installed on the rotating shaft. A plurality of the grinding discs are arranged at intervals along the axial direction of the rotating shaft. A spacer is arranged between two adjacent grinding discs. A stirring portion is arranged on the outer side wall of the spacer;

[0008] Wherein, the grinding discs and the spacers rotate synchronously with the rotating shaft.

[0009] A grinding device according to an embodiment of the present utility model has at least the following beneficial effects: By providing a stirring part on the outer side wall of the spacer sleeve, the fluidity and distribution uniformity of the material during the grinding process can be effectively improved. The stirring part breaks the aggregation state of the material during rotation, avoiding the agglomeration of grinding beads, thereby significantly improving the grinding efficiency and the processing quality of the material; A plurality of grinding discs are arranged at intervals along the axial direction of the rotating shaft. With the assistance of the spacer sleeve, a continuous and efficient material grinding channel is formed. This design ensures that the material can be fully and uniformly acted upon when passing through each grinding disc, greatly improving the dispersibility of the material and the fineness control ability; The grinding disc and the spacer sleeve rotate synchronously with the rotating shaft, strengthening the overall agitation ability of the equipment for the grinding beads, thereby improving the grinding ability for the material to obtain better grinding fineness.

[0010] According to some embodiments of the present utility model, the stirring part is cylindrical, and the stirring parts are circumferentially spaced along the outer side wall of the spacer sleeve. The cylindrical stirring part can form a spiral material flow during rotation, promoting the circulation of the material in the radial and axial directions, increasing the collision opportunities between material particles, and contributing to improving the grinding efficiency and the uniformity of the material.

[0011] According to some embodiments of the present utility model, the stirring part is convex cylindrical, and the size of the stirring part gradually decreases from the side wall of the spacer sleeve towards the outside. The design with gradually decreasing size reduces the direct shear force on the material, which is particularly important for processing fragile or sensitive materials because it can reduce the breakage and excessive refinement of the material, thereby maintaining the quality of the final product.

[0012] According to some embodiments of the present utility model, a transmission groove is provided on the inner side wall of the spacer sleeve, and the transmission groove extends along the circumference of the spacer sleeve; A transmission key is provided on the outer side wall of the rotating shaft, and the transmission key is adapted to the transmission groove, and the transmission key is clamped in the transmission groove. The precise cooperation between the transmission key and the transmission groove ensures the stable connection between the spacer sleeve and the rotating shaft, so that the spacer sleeve can rotate synchronously with the rotating shaft and the grinding disc, avoiding relative sliding, and ensuring the overall coordinated operation of the device.

[0013] According to some embodiments of the present utility model, the transmission key is a semi-circular key, and the transmission groove is a semi-circular groove. The cooperation between the semi-circular key and the semi-circular groove can provide good axial positioning, ensuring the accurate position of the spacer sleeve on the rotating shaft. At the same time, it provides radial guidance for the rotating shaft to prevent axial movement, ensuring the stable operation of the device.

[0014] According to some embodiments of the present utility model, the stirring part and the spacer sleeve are integrally formed. This ensures that there is no gap between the stirring part and the spacer sleeve, eliminates the weak links that may be brought by the split design, improves the strength and durability of the overall structure, and reduces the risk of breakage or loosening under high-speed rotation and high-load conditions.

[0015] According to some embodiments of the present utility model, a plurality of grinding teeth are circumferentially and spacedly arranged on the grinding disc, the stirring part is arranged corresponding to the grinding teeth, and the projection of the stirring part in the direction of the rotation axis falls inside the outer contour line of the grinding teeth. The stirring part does not interfere with the grinding effect of the grinding teeth on the material. Instead, by promoting the flow of the material between the grinding discs, the opportunity for the material to contact the grinding teeth is increased, and the grinding efficiency and effect are improved.

[0016] According to some embodiments of the present utility model, the stirring part and the spacer sleeve maintain the same height in the vertical direction. This maximizes the stirring effect of the stirring part in a limited space, helps to design a compact grinding device, and saves floor space.

[0017] According to some embodiments of the present utility model, the spacer sleeve is provided with four stirring parts. The four stirring parts are circumferentially spaced 90° along the outer edge of the spacer sleeve, and the cross section of the stirring part is rectangular. The rectangular cross section of the stirring part may help to increase the contact area between the stirring part and the material, thereby improving the stirring efficiency, and also enables the stirring part to generate a strong shearing force in the material, which is beneficial to the refinement and mixing of the material.

[0018] According to some embodiments of the present utility model, an arc transition treatment is provided at the abutting portion between the stirring part and the spacer sleeve. The arc transition treatment can effectively disperse stress, avoid the formation of stress concentration points at the connection between the stirring part and the spacer sleeve, thereby reducing the probability of material fatigue and crack occurrence, and enhancing the structural strength and durability of the component.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, wherein:

[0021] Figure 1 is a schematic diagram of a grinding shaft according to an embodiment of the present utility model;

[0022] Figure 2 is one of the schematic diagrams of the spacer sleeve according to an embodiment of the present utility model;

[0023] Figure 3 is another schematic diagram of the spacer sleeve according to an embodiment of the present utility model.

[0024] Reference numerals: grinding disc 100; spacer sleeve 110; rotating shaft 120; stirring part 130; transmission groove 140. Detailed Embodiments

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] Referring to Figures 1 to 3 , a grinding device, comprising:

[0030] a base;

[0031] a rotating assembly rotatably installed on the base. The rotating assembly includes a rotating shaft 120, a grinding disc 100 and a spacer 110. The grinding disc 100 and the spacer 110 are drivingly installed on the rotating shaft 120. A plurality of grinding discs 100 are arranged at intervals along the axial direction of the rotating shaft 120. A spacer 110 is arranged between two adjacent grinding discs 100. A stirring portion 130 is arranged on the outer side wall of the spacer 110;

[0032] wherein, the grinding disc 100 and the spacer 110 rotate synchronously with the rotating shaft 120.

[0033] By providing a stirring part 130 on the outer sidewall of the spacer sleeve 110, the fluidity and uniform distribution of the material during the grinding process can be effectively improved. During rotation, the stirring part 130 breaks the agglomeration state of the material, preventing the grinding beads from caking, thus significantly enhancing the grinding efficiency and the processing quality of the material. A plurality of grinding disks 100 are axially spaced along the rotating shaft 120. With the assistance of the spacer sleeve 110, a continuous and efficient material grinding channel is formed. This design ensures that the material can receive sufficient and uniform acting forces when passing through each grinding disk 100, greatly improving the dispersibility of the material and the ability to control the fineness. The grinding disks 100 and the spacer sleeve 110 rotate synchronously with the rotating shaft 120, enabling the entire rotating assembly to work as a whole, reducing the relative movement between internal components, thereby reducing the wear rate and extending the service life of the device.

[0034] Referring to Figure 2 , the stirring part 130 is cylindrical, and the stirring parts 130 are circumferentially spaced along the outer sidewall of the spacer sleeve 110. The cylindrical stirring part 130 can form a spiral material flow during rotation, prompting the material to circulate in the radial and axial directions, increasing the collision opportunities between material particles, and contributing to improving the grinding efficiency and the uniformity of the material. When processing materials containing high-hardness particles, the grinding shaft device with a cylindrical stirring part 130 has relatively great advantages. Driven by the spiral flow formed by the stirring part 130, the material realizes uniform circulation and distribution, reducing the local accumulation of the material, thus significantly improving the grinding efficiency.

[0035] Referring to Figure 3 , the stirring part 130 is convex-columnar, and the size of the stirring part 130 gradually decreases from the sidewall of the spacer sleeve 110 towards the outside. The design of gradually decreasing size reduces the direct shear force on the material, which is particularly important for processing fragile or sensitive materials because it can reduce the breakage and over-refinement of the material, thus maintaining the quality of the final product. This design effectively avoids the over-breakage of the material and maintains the original shape and characteristics of the material. The integrity and quality of the material processed by the convex-columnar stirring part 130 are well retained.

[0036] Referring to Figure 2 or Figure 3, a transmission groove 140 is provided on the inner side wall of the spacer sleeve 110, and the transmission groove 140 extends along the circumferential direction of the spacer sleeve 110; a transmission key is provided on the outer side wall of the rotating shaft 120, and the transmission key is adapted to the transmission groove 140, and the transmission key is clamped in the transmission groove 140. The precise fit between the transmission key and the transmission groove 140 ensures a stable connection between the spacer sleeve 110 and the rotating shaft 120, so that the spacer sleeve 110 can rotate synchronously with the rotating shaft 120 and the grinding disc 100, avoiding relative sliding and ensuring the overall coordinated operation of the device. The transmission key is a semi-circular key, and the transmission groove 140 is a semi-circular groove. The fit between the semi-circular key and the semi-circular groove can provide good axial positioning, ensure the accurate position of the spacer sleeve 110 on the rotating shaft 120, and at the same time provide radial guidance for the rotating shaft 120 to prevent axial movement and ensure the stable operation of the device.

[0037] It can be understood that multiple transmission grooves 140 can also be provided in the spacer sleeve 110. A plurality of transmission grooves 140 evenly distributed along the circumferential direction are provided on the inner side wall of the spacer sleeve 110 to form a spline groove, and a plurality of transmission keys arranged at circumferential intervals are provided on the outer side wall of the rotating shaft 120 to form a spline shaft. The precise fit between the spline groove and the spline shaft realizes a more complex but efficient transmission method. Compared with the traditional semi-circular key and semi-circular groove, the transmission design of the spline groove and the spline shaft provides more stable axial positioning and radial guidance, can withstand higher torque, and at the same time reduces sliding and wear during power transmission, ensuring a tighter connection between the spacer sleeve 110 and the rotating shaft 120, so as to realize the synchronous rotation of the spacer sleeve 110 and the grinding disc 100 and improve the coordinated operation ability of the overall device.

[0038] The stirring part 130 is integrally formed with the spacer sleeve 110. It ensures that there is no gap between the stirring part 130 and the spacer sleeve 110, eliminates the weak links that may be brought by the split design, improves the strength and durability of the overall structure, and reduces the risk of fracture or loosening under high-speed rotation and high-load conditions.

[0039] A plurality of grinding teeth are arranged at circumferential intervals on the grinding disc 100, the stirring part 130 is arranged corresponding to the grinding teeth, and the projection of the stirring part 130 along the direction of the rotating shaft 120 falls inside the outer contour line of the grinding teeth. The stirring part 130 does not interfere with the grinding effect of the grinding teeth on the material, but instead promotes the flow of the material between the grinding discs 100, increases the chance of the material contacting the grinding teeth, and improves the grinding efficiency and effect.

[0040] The stirring part 130 and the spacer sleeve 110 are kept at the same height in the vertical direction. It maximizes the stirring effect of the stirring part 130 in a limited space, helps to design a compact grinding device, and saves floor space.

[0041] The spacer sleeve 110 is provided with four stirring parts 130, and the stirring parts 130 are circumferentially spaced 90° along the outer edge of the spacer sleeve 110. The cross-section of the stirring part 130 is rectangular. The rectangular cross-section of the stirring part 130 may help increase the contact area between the stirring part 130 and the material, thereby improving the stirring efficiency, and also enabling the stirring part 130 to generate a strong shear force in the material, which is beneficial to the refinement and mixing of the material. It can be understood that the number of the stirring parts 130 is not fixed and can be adjusted according to different material characteristics and processing requirements. For example, when processing low-viscosity materials, the number of the stirring parts 130 can be appropriately reduced to reduce unnecessary energy consumption; while when processing high-viscosity materials or materials that require high shear force, the material processing effect can be further improved by increasing the number of the stirring parts 130.

[0042] An arc transition treatment is provided at the abutting portion between the stirring part 130 and the spacer sleeve 110. The arc transition treatment can effectively disperse stress, avoid the formation of stress concentration points at the connection between the stirring part 130 and the spacer sleeve 110, thereby reducing the probability of material fatigue and crack occurrence, and enhancing the structural strength and durability of the component.

[0043] In this embodiment, the structural features of the grinding shaft device proposed can solve the problems of material caking and blockage by improving the spacer sleeve 110 and the stirring part 130, while enhancing the durability and ease of maintenance of the equipment. The base is made of high-strength metal material and can be made of cast iron or aluminum alloy. The rotating assembly includes a rotating shaft 120, a grinding disc 100 and a spacer sleeve 110. Among them, the rotating shaft 120 is made of high-quality alloy material and is specially treated to enhance wear resistance and corrosion resistance. The grinding disc 100 is made of high-hardness material to ensure excellent grinding performance after long-term use. A plurality of grinding teeth are provided on the outer peripheral surface of the grinding disc 100, which can increase the grinding efficiency. Four stirring parts 130 are provided on the outer side wall of the spacer sleeve 110, and the stirring parts 130 are circumferentially spaced 90° along the outer edge of the spacer sleeve 110. The cross-section of the stirring part 130 is rectangular, and the circulation and mixing of the material are optimized through its unique shape and position. It can be understood that the shape of the stirring part 130 can be adaptively modified according to the shape of the material. Power transmission between the rotating shaft 120 and the spacer sleeve 110 is achieved through the precise fit of a half key and a half groove, ensuring the synchronous rotation of the spacer sleeve 110 and the rotating shaft 120. The size design of the transmission key is adapted to achieve stable and efficient power transmission. The transmission method of the half key and the half groove simplifies the assembly and disassembly process of the grinding shaft assembly, reducing the maintenance cost and time consumption. The grinding shaft device of the present utility model not only shows significant advantages in improving the grinding efficiency, reducing the maintenance workload and enhancing the durability of the equipment, but also the optimization of its structural design is particularly suitable for industrial scenarios such as fine chemical industry, pharmaceutical industry, food processing, etc. that have strict requirements for grinding accuracy and efficiency, and has broad market application potential.

[0044] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A grinding device, characterized in that: include: Pedestal; A rotating assembly is rotatably mounted on a base, the rotating assembly comprising a rotating shaft, a grinding disc and a spacer sleeve, the grinding disc and the spacer sleeve are drivingly mounted on the rotating shaft, a plurality of the grinding discs are spaced apart along the axial direction of the rotating shaft, a spacer sleeve is arranged between two adjacent grinding discs, and an outer side wall of the spacer sleeve is provided with a stirring portion; Wherein, the grinding disc and the spacer sleeve rotate synchronously with the rotating shaft.

2. A grinding device according to claim 1, characterized in that: The stirring parts are cylindrical and are arranged at intervals along the outer wall of the spacer in the circumferential direction.

3. A grinding device according to claim 1, characterized in that: The stirring portion is in the shape of a convex column, and the size of the stirring portion gradually decreases as it extends outward from the side wall of the spacer.

4. A grinding device according to claim 1, characterized in that: The inner wall of the spacer is provided with a transmission groove, and the transmission groove is extended along the circumference of the spacer; the outer wall of the rotating shaft is provided with a transmission key, and the transmission key is adapted to the transmission groove, and the transmission key is clamped in the transmission groove.

5. A grinding device according to claim 4, characterized in that: The transmission key is a semicircular key, and the transmission groove is a semicircular groove.

6. A grinding device according to claim 1, characterized in that: The stirring portion and the spacer are integrally formed.

7. A grinding device according to claim 1, characterized in that: The grinding disc is provided with a plurality of grinding teeth at intervals in the circumferential direction, the stirring portion is provided corresponding to the grinding teeth, and the projection of the stirring portion along the rotation axis direction falls inside the outer contour line of the grinding teeth.

8. A grinding device according to claim 1, characterized in that: The stirring portion and the spacer sleeve maintain a consistent height in a vertical direction.

9. A grinding device according to claim 1, characterized in that: The spacer is provided with four stirring parts, which are arranged at 90° intervals in the circumferential direction along the outer edge of the spacer, and the cross section of the stirring part is rectangular.

10. A grinding device according to claim 1, characterized in that: The abutment portion between the stirring portion and the spacer is provided with an arc transition treatment.

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