Grinding disc and grinding machine
By designing non-parallel grooves and reasonable tooth-shaped grinding sheet structures, the problem of high fiber bundle content during the refining process is solved, and better fiber cutting effect and fiber bundle control are achieved.
Patent Information
- Application Number
- CN202421780159.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-25
AI Technical Summary
During the refining process of the existing grinding sheet, some of the slurry is not fully refined, resulting in a high fiber bundle content and it is difficult to meet the strict fiber bundle control requirements.
The integrated structure of the grinding sheet is designed, including the first grinding sheet and the second grinding sheet. The first grinding sheet is used for thick grinding. The second grinding sheet plays a supporting role. The grooves are not parallel to the rotation direction of the grinding sheet. The grinding teeth are used for thick grinding. The grooves are used to guide the slurry flow direction. Through reasonable tooth shape and size design, the residence time and shearing effect of the slurry in the slurry area are increased.
By increasing the residence time and shearing effect of the slurry in the refining area, the fiber bundle content is effectively reduced, the fiber cutting effect is improved, and the strict requirements of fiber bundle control are met.
Smart Images
Figure CN223088174U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machining, and particularly to a grinding disc and a grinding mill. Background Art
[0002] Chemical pulp is an important raw material in pulp preparation. During the production process, fiber bundle control is one of the key quality indicators, including whiteness, freeness, and fiber bundle content, etc. Fiber bundle control is very important for the normal operation of the downstream paper machine. During the production process of chemical pulp, fiber bundle control is mainly carried out through raw material selection, high-concentration grinding energy consumption, low-concentration grinding energy consumption, and pressure screen screening, etc. With the increase in production, the requirements for fiber bundle control are becoming more and more stringent, and the existing control means have approached the limit, and it has become increasingly difficult to reduce the fiber bundle content under the existing conditions. Summary of the Invention
[0003] An embodiment of this application provides a grinding disc, including:
[0004] A first grinding disc and a second grinding disc of an integral structure, the first grinding disc covers the second grinding disc, the first grinding disc is used for high-concentration grinding, and the second grinding disc plays a supporting role;
[0005] The first grinding disc includes grinding teeth and grooves. Grooves are provided on the first grinding disc, the extending direction of the grooves is not parallel to the rotation direction of the grinding disc, the grinding teeth are located on the surface of the first grinding disc where the grooves are not provided, the grinding teeth are used for high-concentration grinding of the pulp, and the grooves are used to guide the flow direction of the pulp.
[0006] In some embodiments, the grooves include a plurality of groove monomers, the groove monomers located in the same extending direction are interconnected, and each groove monomer is a triangular structure.
[0007] In some embodiments, the grinding disc includes a stationary disc grinding disc and a rotating disc grinding disc. The stationary disc grinding disc and the rotating disc grinding disc have different sizes and are installed at different positions on the grinding mill rotating shaft, and jointly act on the high-concentration grinding of the pulp; the stationary disc grinding disc of the grinding disc includes a stationary disc outer ring and a stationary disc inner ring, the rotating disc grinding disc of the grinding disc is divided into a rotating disc outer ring and a rotating disc inner ring, and the grooves of the stationary disc inner ring and the rotating disc inner ring are arranged with a certain angle of deflection, so as to further guide the pulp.
[0008] In some embodiments, the tooth depth of the grinding teeth of the stationary disc inner ring of the grinding disc is 6.04 - 7.42, and the tooth width is 1.82 - 2.16.
[0009] In some embodiments, the tooth depth of the grinding teeth of the stationary disc outer ring of the grinding disc is 6.01 - 6.60, and the tooth width is 1.82 - 2.19.
[0010] In some embodiments, the pitch of the grinding teeth on the inner ring of the static disk of the grinding plate is 2.44 - 3.06, and the pitch of the grinding teeth on the outer ring of the static disk is 2.78 - 3.06.
[0011] In some embodiments, the depth of the grinding teeth on the inner ring of the moving disk of the grinding plate is 5.36 - 6.42, and the width of the grinding teeth is 1.89 - 2.10.
[0012] In some embodiments, the depth of the grinding teeth on the outer ring of the moving disk of the grinding plate is 5.2 - 6.34, and the width of the grinding teeth is 1.78 - 2.09.
[0013] In some embodiments, the pitch of the grinding teeth on the inner ring of the moving disk of the grinding plate is 2.23 - 2.56, and the pitch of the grinding teeth on the outer ring of the moving disk is 2.13 - 2.81.
[0014] In a second aspect, an embodiment of the present application provides a grinding mill, including the grinding plate described in any one of the above.
[0015] The grinding plate provided by the present application can change the shape and size of the tooth grooves, allowing the pulp to stay in the grinding area for a longer time, better cutting the fibers, and being beneficial to reducing the fiber bundle content. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 is a schematic diagram of the partial structure of the outer ring of the grinding plate of the present application Figure Two
[0018] Figure 2 is a schematic diagram of the partial structure of the inner ring of the grinding plate of the present application Figure Two
[0019] Figure 3 is a schematic diagram of the positional relationship between the outer ring and the inner ring of the grinding plate in the grinding plate of the present application Figure Two
[0020] Figure 4 is a schematic diagram of the positional relationship between the static disk grinding plate and the moving disk grinding plate in the grinding plate of the present application Figure Two
[0021] Figure 5 is a schematic diagram of the structure of the grinding mill of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0023] The above is only the embodiment of the present application, and it does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.
[0024] The terms "first", "second", and "third" in the embodiments of the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include unlisted steps or units, or may optionally further include other steps or components inherent to these processes, methods, products, or devices.
[0025] Referring to "embodiments" herein means that a specific feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0026] The purpose of the embodiments of the present application is to overcome the defects and deficiencies in the prior art, and provide a grinding disc, which can solve the problem that in the solution of the grinding disc and the grinding mill, some slurries in the old grinding disc are not fully ground during the pulping process, resulting in a relatively high content of fiber bundles in the formed pulp.
[0027] Such as Figure 1 AndFigure 2 As shown Figure 1 This is a schematic diagram of a partial structure of the outer ring of the abrasive disc of the present application Figure 2 This is a schematic diagram of a partial structure of the inner ring of the abrasive disc of the present application. The abrasive disc includes a first abrasive disc 10 and a second abrasive disc 20. The first abrasive disc 10 covers the second abrasive disc 20. The first abrasive disc 10 is used for thick grinding, and the second abrasive disc 20 plays a supporting role; the materials of the first abrasive disc 10 and the second abrasive disc 20 can be but are not limited to steel, etc., and the first abrasive disc 10 and the second abrasive disc 20 are integrally formed
[0028] The first abrasive disc 10 includes grinding teeth 100 and grooves 110. Grooves 110 are provided on the first abrasive disc 10. The extending direction of the grooves 110 is not parallel to the rotation direction of the abrasive disc. The grinding teeth 100 are located on the surface of the first abrasive disc where the grooves 110 are not provided. The grinding teeth 100 are used for thick grinding of the pulp, and the grooves 110 are used to guide the flow direction of the pulp. The grooves 110 include a plurality of groove monomers 1000. The groove monomers 1000 located in the same extending direction are interconnected. Each groove monomer 1000 is a triangular structure. The groove monomers 1000 in the same extending direction form a groove row 120, and different groove rows 120 are parallel to each other. Through holes 200 are provided on the second abrasive disc 20. The abrasive disc 1 is respectively installed on the mounting disc through the through holes 200 and rotates in cooperation with another group or two groups of abrasive discs 1
[0029] The design that the extending direction of the grooves 110 is not parallel to the rotation direction of the abrasive disc can increase the residence time of the pulp in the grinding area. Due to the shape of the grooves 110, the pulp will experience more shearing and cutting processes when passing through the grinding area, thus providing a better fiber cutting effect. At the same time, the increase in the residence time of the pulp also helps to more fully expose the fiber bundles to the grinding action, reducing the fiber bundle content; at the same time, the groove 110 design can effectively reduce the length and quantity of the fiber bundles. During the grinding process, the fiber bundles will be subjected to shearing and cutting actions, and the groove 110 design can make these actions more sufficient and uniform, thus effectively cutting the fiber bundles into shorter lengths and reducing the quantity of the fiber bundles
[0030] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the positional relationship between the outer ring and the inner ring of the abrasive disc in the abrasive disc of the present application. The outer ring 12 of the abrasive disc is the abrasive disc on the side of the arc long side, and the inner ring 11 of the abrasive disc is the abrasive disc on the side of the arc short side. The two together form the abrasive disc
[0031] Please refer to Figure 4 , Figure 4It is a schematic diagram of the positional relationship between the stationary disc abrasive and the rotating disc abrasive in the grinding disc of this application. The grinding disc 1 includes a stationary disc abrasive 30 and a rotating disc abrasive 40. The stationary disc abrasive 30 and the rotating disc abrasive 40 have different sizes and are installed at different positions on the rotating shaft of the grinding mill 50, and they jointly act on the thick grinding of the slurry. The stationary disc abrasive 30 of the grinding disc 1 includes a stationary disc outer ring 300 and a stationary disc inner ring 310. The rotating disc abrasive 40 of the grinding disc 1 is divided into a rotating disc outer ring 400 and a rotating disc inner ring 410. The grooves 110 of the stationary disc inner ring 310 and the rotating disc inner ring 410 are deflected at a certain angle, so as to further guide the slurry.
[0032] The tooth depth, tooth width and tooth pitch of the stationary disc inner ring 310 and the stationary disc outer ring 300 are all different from those of the rotating disc inner ring 410 and the rotating disc outer ring 400. The specific data are shown in the following table:
[0033] Inner Ring of Static Disk 310 Tooth Depth Tooth Width Tooth Pitch Unit: mm 6.04-7.42 1.82-2.16 2.44-3.06 Outer Ring of Static Disk 300 Tooth Depth Tooth Width Tooth Pitch Unit: mm 6.01-6.60 1.82-2.19 2.78-3.06 Inner Ring of Rotating Disk 410 Tooth Depth Tooth Width Tooth Pitch Unit: mm 5.36-6.42 1.89-2.10 2.23-2.56 Outer Ring of Rotating Disk 400 Tooth Depth Tooth Width Tooth Pitch Unit: mm 5.2-6.34 1.78-2.09 2.13-2.81
[0034] Among them, the stationary disc abrasive 30 has a deeper tooth depth, a wider tooth width and a larger tooth pitch. Such a design can provide a greater cutting force. The increase in cutting force helps to more effectively cut off the fiber bundles, making the fiber cutting effect better. The rotating disc abrasive 40 has a relatively shallower tooth depth, a narrower tooth width and a relatively wider tooth pitch. Such a design can better feed the fiber bundles into the pulping area. Through a reasonable tooth profile design, the fiber bundles can smoothly enter the pulping device, increasing the contact area between the fibers and the pulping device, and further improving the fiber cutting effect.
[0035] In addition, this application provides a grinding mill 50. Please refer to Figure 4 , Figure 4 It is a schematic diagram of the structure of the grinding mill of this application. The grinding mill 50 is used for thick grinding of the slurry. The stationary disc abrasive 30 and the rotating disc abrasive 40 are located inside the grinding mill 50. The stationary disc abrasive 30 and the rotating disc abrasive 40 are both annular grinding discs 1. The stationary disc abrasive 30 is located on the periphery of the rotating disc abrasive 40. Among them, the stationary disc abrasive 30 is stationary on the periphery, while the rotating disc abrasive 40 is driven by the power device 60 of the grinding mill 50 to rotate. The slurry is located between the rotating disc abrasive 40 and the stationary disc abrasive 30 for thick grinding. The grinding mill provided by this application can change the shape and size of the tooth grooves of the grinding disc, so that the slurry stays in the pulping area for a longer time, better cuts off the fibers, and is beneficial to reducing the fiber bundle content.
[0036] The above are only some embodiments of this application, and thus do not limit the protection scope of this application. Any equivalent device or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.
Claims
1. A grinding disc, characterized in that, Comprising: A first grinding disc and a second grinding disc of an integral structure, the first grinding disc covering the second grinding disc, the first grinding disc being used for coarse grinding, and the second grinding disc playing a supporting role; The first grinding disc includes grinding teeth and grooves. Grooves are provided on the first grinding disc. The extending direction of the grooves is not parallel to the rotation direction of the grinding disc. The grinding teeth are located on the surface of the first grinding disc where no grooves are provided. The grinding teeth are used for coarse grinding of the pulp, and the grooves are used to guide the flow direction of the pulp.
2. The abrasive sheet according to claim 1, characterized in that The grooves include a plurality of groove monomers, and the groove monomers located in the same extending direction are interconnected with each other, and each groove monomer is a triangular structure.
3. The abrasive disc according to claim 1, wherein, The grinding disc includes a stationary disc grinding disc and a rotating disc grinding disc. The stationary disc grinding disc and the rotating disc grinding disc have different sizes and are installed at different positions on the mill rotating shaft, and jointly act on the coarse grinding of the pulp; the stationary disc grinding disc of the grinding disc includes a stationary disc outer ring and a stationary disc inner ring, and the rotating disc grinding disc of the grinding disc is divided into a rotating disc outer ring and a rotating disc inner ring. The grooves of the stationary disc inner ring and the rotating disc inner ring are arranged with a certain angle of deflection, so as to further guide the pulp.
4. The abrasive disc according to claim 3, characterized in that The tooth depth of the grinding teeth of the stationary disc inner ring of the grinding disc is 6.04 - 7.42, and the tooth width is 1.82 - 2.
16.
5. The abrasive sheet according to claim 3, characterized in that, The tooth depth of the grinding teeth of the stationary disc outer ring of the grinding disc is 6.01 - 6.60, and the tooth width is 1.82 - 2.
19.
6. The abrasive sheet according to claim 3, characterized in that, The tooth pitch of the grinding teeth of the stationary disc inner ring of the grinding disc is 2.44 - 3.06, and the tooth pitch of the grinding teeth of the stationary disc outer ring of the grinding disc is 2.78 - 3.
06.
7. The abrasive disc according to claim 3, characterized in that, The tooth depth of the grinding teeth of the rotating disc inner ring of the grinding disc is 5.36 - 6.42, and the tooth width is 1.89 - 2.
10.
8. The abrasive sheet according to claim 3, wherein The tooth depth of the grinding teeth of the rotating disc outer ring of the grinding disc is 5.2 - 6.34, and the tooth width is 1.78 - 2.
09.
9. The abrasive disc according to claim 3, wherein The tooth pitch of the grinding teeth of the rotating disc inner ring of the grinding disc is 2.23 - 2.56, and the tooth pitch of the grinding teeth of the rotating disc outer ring of the grinding disc is 2.13 - 2.
81.
10. A mill, characterized in that, The mill includes the grinding disc according to any one of claims 1 - 9.