Ceramic skew roller
Patent Information
- Application Number
- CN202621172988.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-31
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2036-07-31
AI Technical Summary
[0004]本实用新型所要解决的技术问题在于，提供了一种陶瓷斜齿辊棒，以解决现有技术中辊棒表面凹槽或螺纹结构散热面积有限、热应力分布不均匀，导致辊棒在高温环境下容易因局部过热而变形或断裂的技术问题
本实用新型中的一种陶瓷斜齿辊棒，通过在辊棒主体外表面设置多个相对于轴线方向倾斜的斜型槽，且多个斜型槽沿周向间隔排列形成螺旋状凸起，相较于现有环状槽或直槽结构，具有多方面的综合优势。在散热性能方面，倾斜设置的斜型槽在单位长度内具有更大的槽体总长度和表面积，有效增加了辊棒的散热面积，同时空气可沿倾斜槽向流动并形成顺畅的气流通道，改善了热量散发效率；更为重要的是，斜型槽沿辊棒表面螺旋延伸，使热量可沿螺旋路径传导和散发，辊棒周向各部位均能获得均匀的散热效果，避免了环状槽散热路径短、直槽散热面积小的缺陷，从而使辊棒在高温环境下热应力分布更加均匀，能够有效减少局部过热现象，显著降低因热应力集中导致的辊棒变形或损坏风险，提升了辊棒的热稳定性。在传输性能方面，斜型槽结构增加了辊棒与陶瓷坯体或承载物之间的接触面积和摩擦力，有效防止坯体在传输过程中滑动、偏移或倾倒，确保传输平稳。斜型槽的沟槽可容纳和引导釉料、粉尘等杂质，便于清洁维护，兼具良好的防粘连性能。斜型槽贯穿辊棒主体全长，空气可从辊棒的一端进入斜型槽、从另一端流出，形成了贯穿式的空气流通路径，进一步改善了空气在斜型槽内的流动效率，有助于热量从辊棒两端散发，避免了热量在槽内积聚，进一步提升了整体散热效率和热稳定性。将斜型槽的深宽比限定为1:2~1:3.5，使斜型槽的截面呈宽浅形态，既保证了侧壁与坯体之间有足够的接触面积以产生有效的横向分力，又避免了因槽体过深导致应力集中或坯体损伤，同时宽浅的槽底平面有利于应力均匀分布，在保证纠偏效果的同时兼顾了结构强度。同时还可以在保证散热面积的同时避免槽体过深导致辊棒结构强度削弱，或槽体过浅导致散热效果不足，实现了散热性能与结构强度的最优化平衡。
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Figure CN224920889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ceramic roller technology, and in particular to a ceramic helical tooth roller. Background Technology
[0002] Ceramic rollers are core components in ceramic production equipment such as roller kilns, used to support and transport ceramic blanks. Traditional ceramic rollers typically have a smooth surface. In the high-temperature kiln environment, the limited surface area of smooth rollers results in insufficient heat dissipation, causing heat to easily accumulate locally, leading to thermal stress concentration. This can then cause the rollers to break or deform, shortening their service life.
[0003] To address this, existing technologies have proposed improvements by incorporating grooves or threads on the surface of the rollers to increase surface area and improve heat dissipation. However, existing grooves or threads on the roller surface are mostly regularly arranged along the circumference or axial direction of the roller, such as annular grooves and straight grooves. While annular grooves increase the heat dissipation area, their orientation is perpendicular to the roller axis, making it difficult for air to flow along them, resulting in limited heat dissipation efficiency. Straight grooves extend along the roller axis, allowing air to flow along the groove direction, but the increase in heat dissipation area is limited, and a uniform heat conduction path cannot be formed around the roller circumference. Therefore, rollers with existing grooved or threaded structures still suffer from uneven thermal stress distribution under high-temperature conditions, and localized overheating remains unresolved. Consequently, rollers in high-temperature kilns still face a significant risk of deformation or breakage. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a ceramic helical tooth roller bar, so as to solve the technical problem that the heat dissipation area of the groove or thread structure on the surface of the roller bar is limited and the thermal stress distribution is uneven, which makes the roller bar easy to deform or break due to local overheating in high temperature environment.
[0005] To solve the above-mentioned technical problems, this utility model provides a ceramic helical toothed roller, including a roller body and a plurality of helical grooves disposed on the outer surface of the roller body. The helical grooves are inclined relative to the axial direction of the roller body, and the plurality of helical grooves are arranged at intervals along the circumference of the roller body, so that the outer surface of the roller body forms a spiral protrusion. The two ends of the helical grooves extend to the two ends of the roller body, and the helical grooves form openings at the end faces of the two ends of the roller body. The depth-to-width ratio of the helical grooves is 1:2 to 1:3.5.
[0006] As an improvement to the above solution, the inclination angle of the inclined groove relative to the axis of the main body of the roller is 10°~45°.
[0007] As an improvement to the above solution, the spiral protrusion is formed by a plurality of the inclined grooves arranged at intervals, and the plurality of the inclined grooves form a left-hand thread or a right-hand thread on the outer surface of the roller body.
[0008] As an improvement to the above solution, the spiral protrusion includes a first top surface and a first side surface, the inclined groove includes a first bottom surface, the area of a single first top surface is S1, the area of a single inclined groove's first bottom surface is S2, and S1 ≥ S2.
[0009] As an improvement to the above scheme, the area of a single first top surface is S1, and the area of a single inclined groove first bottom surface is S2, which satisfies: S1=1×S2~2×S2.
[0010] As an improvement to the above scheme, the width of the first top surface is either equal or gradually increases along the axial direction.
[0011] As an improvement to the above scheme, the two ends of the roller body are respectively the first segment and the second segment. The width of the first top surface of the first segment is W1, and the width of the first top surface of the second segment is W2, which satisfies: W1=1×W2~1.2×W2.
[0012] As an improvement to the above solution, the cross-section of the inclined groove is trapezoidal or fan-shaped, the width of the side of the cross-section closer to the center of the roller body is smaller than the width of the side farther from the center of the roller body, and the bottom of the inclined groove is a plane or a curved surface.
[0013] As an improvement to the above solution, the depth of the inclined groove is 1mm~4mm, the width is 2mm~8mm, and the spacing between adjacent inclined grooves is 5mm~20mm.
[0014] As an improvement to the above solution, multiple inclined grooves are arranged at equal intervals along the circumference of the roller body.
[0015] As an improvement to the above solution, the inclined groove and the main body of the roller are integrally formed.
[0016] As an improvement to the above solution, the main body of the roller is made of one or more of the following materials: alumina, silicon nitride, silicon carbide, mullite, or cordierite.
[0017] The beneficial effects of implementing this utility model are as follows: This invention relates to a ceramic helical toothed roller, which features multiple inclined grooves on the outer surface of the roller body, tilted relative to the axial direction. These grooves are arranged circumferentially to form a spiral protrusion, offering several advantages over existing annular or straight groove structures. In terms of heat dissipation, the inclined grooves have a larger total length and surface area per unit length, effectively increasing the roller's heat dissipation area. Simultaneously, air can flow along the inclined grooves, forming a smooth airflow channel and improving heat dissipation efficiency. More importantly, the spiral extension of the grooves along the roller surface allows heat to be conducted and dissipated along the spiral path, ensuring uniform heat dissipation across the roller's circumference. This avoids the shortcomings of short heat dissipation paths in annular grooves and small heat dissipation areas in straight grooves, resulting in a more uniform thermal stress distribution in high-temperature environments. This effectively reduces localized overheating, significantly lowers the risk of roller deformation or damage due to thermal stress concentration, and improves the roller's thermal stability. In terms of transmission performance, the inclined groove structure increases the contact area and friction between the roller and the ceramic blank or support, effectively preventing the blank from sliding, shifting, or tipping during transmission and ensuring smooth transmission. The grooves of the inclined groove can accommodate and guide impurities such as glaze and dust, facilitating cleaning and maintenance, and also providing good anti-adhesion performance. The inclined groove runs through the entire length of the roller body, allowing air to enter from one end of the roller and exit from the other, forming a through-flow air circulation path. This further improves the airflow efficiency within the inclined groove, helping heat dissipate from both ends of the roller and preventing heat accumulation within the groove, thus further enhancing overall heat dissipation efficiency and thermal stability. Limiting the depth-to-width ratio of the inclined groove to 1:2 to 1:3.5 results in a wide and shallow cross-section, ensuring sufficient contact area between the sidewall and the blank to generate effective lateral force, while avoiding stress concentration or blank damage due to excessive groove depth. Simultaneously, the wide and shallow groove bottom promotes uniform stress distribution, ensuring both corrective effect and structural strength. At the same time, it can ensure the heat dissipation area while avoiding the problem of the groove being too deep, which would weaken the strength of the roller structure, or the groove being too shallow, which would result in insufficient heat dissipation effect, thus achieving the optimal balance between heat dissipation performance and structural strength. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a ceramic helical toothed roller in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a left-handed ceramic helical toothed roller in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a right-handed ceramic helical toothed roller bar in an embodiment of this application; Figure 4 This is a side view of a ceramic helical toothed roller bar according to an embodiment of this application; Figure 5 This is a front view of a ceramic helical toothed roller according to an embodiment of this application.
[0019] The reference numerals in the attached drawings are explained as follows: 100, main body of the roller; 200, inclined groove; 210, first bottom surface; 300, spiral protrusion; 310, first top surface; 320, first side surface. Detailed Implementation
[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0021] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a ceramic helical toothed roller bar in an embodiment of this application; as shown... Figure 1 As shown, the ceramic helical toothed roller includes a roller body 100 and a plurality of inclined grooves 200 disposed on the outer surface of the roller body 100. The inclined grooves 200 are inclined relative to the axial direction of the roller body 100, and the plurality of inclined grooves 200 are arranged at intervals along the circumference of the roller body 100, so that the outer surface of the roller body 100 forms a spiral protrusion. By providing multiple inclined grooves 200 on the outer surface of the roller body 100, which are tilted relative to the axial direction, and arranged circumferentially to form a spiral protrusion 300, the inclined grooves 200 have a larger total length and surface area per unit length compared to annular or straight grooves, effectively increasing the heat dissipation area of the roller. Simultaneously, the spiral extension of the inclined grooves 200 along the roller surface allows air to flow along the groove direction, forming a smooth airflow channel, improving air circulation and heat dissipation. This results in a more uniform distribution of thermal stress in the roller under high-temperature conditions, effectively reducing localized overheating and significantly lowering the risk of roller deformation or damage due to thermal stress concentration, thus improving the roller's thermal stability. The inclined groove structure 200 increases the contact area and friction between the roller and the ceramic blank or support, effectively preventing the blank from sliding, shifting, or tipping during transport, ensuring smooth transport, and improving production accuracy and yield. The grooves of the inclined groove 200 can accommodate and guide impurities such as glaze and dust, making them easier to clean or remove during rotation, reducing the contamination of the blank surface by impurities, and lowering the difficulty of cleaning and maintenance costs.
[0022] See Figure 1Furthermore, in this embodiment, the two ends of the inclined groove 200 extend to the two ends of the roller body 100, and the inclined groove 200 forms openings at the end faces of the two ends of the roller body 100. The inclined groove 200 extends through the entire length of the roller body 100. This structure allows air to enter the inclined groove 200 from one end of the roller and flow out from the other end, forming a through-flow air circulation path. This further improves the airflow efficiency within the inclined groove 200, helps dissipate heat from both ends of the roller, avoids heat accumulation within the groove, and further enhances the overall heat dissipation efficiency and thermal stability.
[0023] Preferably, the depth-to-width ratio of the inclined groove 200 is 1:2 to 1:3.5. This results in a wide and shallow cross-section for the inclined groove 200, ensuring sufficient contact area between the sidewall and the billet to generate effective lateral force, while avoiding stress concentration or billet damage due to excessive groove depth. The wide and shallow bottom plane of the groove also promotes uniform stress distribution, ensuring both corrective effect and structural strength. Furthermore, it ensures sufficient heat dissipation area while avoiding situations where excessive groove depth weakens the roller structure or excessively shallow groove leads to insufficient heat dissipation, achieving an optimal balance between heat dissipation performance and structural strength.
[0024] See Figure 5 , Figure 5 This is a front view of a ceramic helical toothed roller bar according to an embodiment of this application; Furthermore, in this embodiment, the inclination angle α of the inclined groove 200 relative to the axial direction of the roller body 100 is 10°~45°, preferably 15°. Within this angle range, the inclined groove 200 neither approaches an axial straight groove, resulting in limited increase in heat dissipation area, nor approaches an annular groove, making it difficult for air to flow along the groove direction. This ensures a clear and regular thread structure while effectively balancing heat dissipation, friction enhancement, and molding processability. The effect is optimal when the angle is 15°, achieving the best balance between increasing heat dissipation area, improving thermal stress distribution, and ensuring the structural strength of the roller.
[0025] See Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a left-handed ceramic helical toothed roller in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a right-handed ceramic helical toothed roller bar in an embodiment of this application; Furthermore, in this embodiment, the spiral protrusion is formed by a plurality of inclined grooves 200 spaced apart, and the plurality of inclined grooves 200 form left-hand or right-hand threads on the outer surface of the roller body 100. By forming left-hand or right-hand threads on the outer surface of the roller body 100 with the plurality of inclined grooves 200, the roller can be adapted to transmission systems with different rotation directions. In equipment such as roller kilns, the transmission systems of different kilns rotate in different directions. Left-hand threaded rollers and right-hand threaded rollers can be adapted to clockwise or counterclockwise rotating transmission shafts, respectively, to ensure that the roller and the transmission system operate synchronously and avoid loosening, jamming, or reduced transmission efficiency due to mismatch in thread direction. At the same time, in the scenario of conveying complex shaped billets, the thread direction can be flexibly selected according to the placement direction and movement trajectory of the billet, so that the billet moves more stably with the roller.
[0026] See Figure 1 and Figure 4 , Figure 4 This is a side view of a ceramic helical toothed roller bar according to an embodiment of this application; Furthermore, in this embodiment, the spiral protrusion 300 includes a first top surface 310 and a first side surface, and the inclined groove 200 includes a first bottom surface 210. The area of a single first top surface 310 is S1, and the area of a single first bottom surface 210 of the inclined groove 200 is S2, where S1 ≥ S2. This ensures that the area of the top surface of the protrusion on the roller surface is not less than the area of the bottom surface of the groove. This area relationship ensures that the contact area between the roller and the blank is sufficiently large, avoiding damage to the blank surface due to excessive local pressure caused by an insufficient contact area. It also helps to ensure that the roller has sufficient structural strength under high-temperature loads, extending the service life of the roller.
[0027] Furthermore, in this embodiment, the area of a single first top surface 310 is S1, and the area of a single first bottom surface 210 of an inclined groove 200 is S2, satisfying: S1 = 1 × S2 ~ 2 × S2. Within this ratio range, the raised top surface of the roller has sufficient effective contact area with the blank, ensuring sufficient friction to prevent the blank from sliding, and evenly distributing the contact pressure over a large area to avoid excessive local pressure causing damage to the blank. Simultaneously, this area ratio also ensures that the inclined groove 200 has sufficient groove volume to accommodate glaze and impurities, comprehensively optimizing the friction-enhancing effect, anti-adhesion effect, and blank protection performance.
[0028] Furthermore, in this embodiment, the width of the first top surface 310 is equal along the axial direction, and the contact force between the roller and the billet is uniformly distributed along the axial direction, which is suitable for the stable transmission of conventional billets.
[0029] In other embodiments, the width of the first top surface 310 can also be set to gradually increase. When the width of the top surface gradually increases, it can adapt to the variable cross-section billet or specific process requirements, so that the billet is subjected to gradual changes in force during the transmission process, avoiding the deformation or cracking of the billet caused by sudden changes in force, and improving the adaptability of the roller to billets of different specifications.
[0030] Specifically, the roller body 100 has a first section and a second section at its two ends. The width of the first top surface 310 of the first section is W1, and the width of the first top surface 310 of the second section is W2, satisfying the condition: W1 = 1 × W2 ~ 1.2 × W2. That is, the top surface width of the first section is slightly larger than that of the second section, giving the roller different contact areas and frictional forces at both ends. In a roller kiln, the billet entry end requires a larger driving force, while the output end requires a smooth transition. The differentiated design of the top surface widths at both ends can further optimize the contact stress distribution between the roller and the billet while ensuring transmission stability, thus extending the service life of both the roller and the billet.
[0031] See Figure 4 Furthermore, in this embodiment, the cross-section of the inclined groove 200 is fan-shaped, and the width of the side of the cross-section closer to the center of the roller body 100 is smaller than the width of the side farther from the center of the roller body 100. The bottom of the inclined groove 200 is curved. The arc-shaped bottom of the fan-shaped cross-section eliminates stress concentration points at sharp corners, allowing thermal and mechanical stresses to be evenly distributed along the arc surface, effectively avoiding stress peaks and significantly improving the roller's resistance to fracture under high-temperature loads. The arc-shaped curved bottom facilitates the sliding and discharge of impurities such as glaze and dust along the arc surface, preventing accumulation in dead corners and exhibiting excellent self-cleaning properties. Under the same groove depth, the surface area of the fan-shaped cross-section is larger than that of the trapezoidal cross-section, further increasing the heat dissipation area and improving heat dissipation efficiency.
[0032] In other embodiments, the inclined groove 200 has a trapezoidal cross-section, with the width of the side of the trapezoid closer to the center of the roller body 100 being smaller than the width of the side farther from the center of the roller body 100, and the bottom of the inclined groove 200 is flat. The flat groove bottom is relatively easy to process, which helps reduce mold manufacturing costs and is suitable for mass production; the trapezoidal groove structure, while ensuring the groove volume, also provides the groove wall with a reasonable inclination angle, facilitating cleaning and maintenance.
[0033] In other embodiments, the cross-sectional shape of the inclined groove 200 can also be V-shaped or U-shaped. The V-shaped cross-section has better self-cleaning ability, and impurities are not easy to accumulate at the bottom of the groove; the U-shaped cross-section has a larger groove volume, which can accommodate more glaze or impurities.
[0034] Specifically, the depth of the inclined groove 200 is 1mm to 4mm, the width is 2mm to 8mm, and the spacing between adjacent inclined grooves 200 is 5mm to 20mm. These preferred dimensional parameters ensure sufficient structural strength of the roller while guaranteeing heat dissipation, friction enhancement, and anti-adhesion performance.
[0035] Specifically, the plurality of inclined grooves 200 are arranged at equal intervals along the axial direction of the roller body 100. This ensures that the spiral protrusions on the roller surface are evenly distributed, guaranteeing uniform contact force between the roller and the blank during rotation. This avoids excessive or insufficient local force due to uneven texture distribution, thereby ensuring smooth and consistent transmission and improving the stability of product quality.
[0036] Specifically, the inclined groove 200 and the roller body 100 are integrally formed. This allows the inclined groove 200 to be formed directly during the forming process of the roller body 100, eliminating the need for secondary machining. This fundamentally avoids the risk of micro-cracks on the roller surface caused by secondary machining in the prior art, eliminates stress concentration sources, and makes the roller less prone to breakage in the high-temperature kiln environment, significantly extending the service life of the roller.
[0037] Specifically, the main body 100 of the roller is made of one or more of alumina, silicon nitride, silicon carbide, mullite, or cordierite, giving the roller excellent high-temperature resistance, thermal shock resistance, and bending strength. The selection and mixing of multiple materials balances cost and performance, offering good economic efficiency and adaptability. These materials are all high-performance materials in the field of ceramic rollers, exhibiting stable physical and chemical properties in high-temperature kiln environments. Combined with the heat dissipation structure of the inclined groove 200, the thermal stability and service life of the roller under high-temperature conditions can be further improved.
[0038] As can be seen from the above, the ceramic helical toothed roller of this utility model has multiple inclined grooves on the outer surface of the roller body, which are inclined relative to the axial direction and arranged circumferentially to form a spiral protrusion. Compared with the existing annular groove or straight groove structure, it has many comprehensive advantages. In terms of heat dissipation performance, the inclined grooves have a larger total groove length and surface area per unit length, effectively increasing the heat dissipation area of the roller. At the same time, air can flow along the inclined grooves and form a smooth airflow channel, improving the heat dissipation efficiency. More importantly, the inclined grooves extend spirally along the surface of the roller, allowing heat to be conducted and dissipated along the spiral path. All parts of the roller can obtain a uniform heat dissipation effect, avoiding the defects of short heat dissipation path of annular grooves and small heat dissipation area of straight grooves. This makes the thermal stress distribution of the roller more uniform under high temperature environment, effectively reducing local overheating, significantly reducing the risk of roller deformation or damage caused by thermal stress concentration, and improving the thermal stability of the roller. In terms of transmission performance, the inclined groove structure increases the contact area and friction between the roller and the ceramic blank or support, effectively preventing the blank from sliding, shifting, or tipping during transmission and ensuring smooth transmission. Furthermore, the grooves of the inclined groove can accommodate and guide impurities such as glaze and dust, facilitating cleaning and maintenance, and also providing good anti-adhesion properties. The inclined groove runs through the entire length of the roller body, allowing air to enter from one end and exit from the other, forming a through-flow air circulation path. This further improves the airflow efficiency within the inclined groove, helping heat dissipate from both ends of the roller and preventing heat accumulation within the groove, thus further enhancing overall heat dissipation efficiency and thermal stability. Limiting the depth-to-width ratio of the inclined groove to 1:2 to 1:3.5 results in a wide and shallow cross-section, ensuring sufficient contact area between the sidewall and the blank to generate effective lateral force, while avoiding stress concentration or blank damage due to excessive groove depth. Simultaneously, the wide and shallow bottom plane of the groove promotes uniform stress distribution, ensuring both corrective effect and structural strength. At the same time, it can ensure the heat dissipation area while avoiding the problem of the groove being too deep, which would weaken the strength of the roller structure, or the groove being too shallow, which would result in insufficient heat dissipation effect, thus achieving the optimal balance between heat dissipation performance and structural strength.
[0039] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. A ceramic helical toothed roller bar, characterized in that, It includes a roller body and a plurality of inclined grooves disposed on the outer surface of the roller body. The inclined grooves are inclined relative to the axial direction of the roller body. The plurality of inclined grooves are arranged at intervals along the circumference of the roller body, so that the outer surface of the roller body forms a spiral protrusion. The two ends of the inclined groove extend to the two ends of the roller body, and the inclined groove forms an opening at the end face of the two ends of the roller body. The depth-to-width ratio of the inclined groove is 1:2 to 1:3.
5.
2. The ceramic helical toothed roller bar according to claim 1, characterized in that, The inclination angle of the inclined groove relative to the axis of the main body of the roller is 10°~45°.
3. The ceramic helical toothed roller bar according to claim 1, characterized in that, The spiral protrusion is formed by a plurality of the oblique grooves arranged at intervals, and the plurality of oblique grooves form a left-hand thread or a right-hand thread on the outer surface of the roller body.
4. The ceramic helical toothed roller bar according to claim 1, characterized in that, The spiral protrusion includes a first top surface and a first side surface, and the inclined groove includes a first bottom surface. The area of a single first top surface is S1, and the area of a single inclined groove's first bottom surface is S2, where S1 ≥ S2.
5. The ceramic helical toothed roller bar according to claim 4, characterized in that, The area of the first top surface of a single inclined groove is S1, and the area of the first bottom surface of a single inclined groove is S2, which satisfies: S1 = 1 × S2 ~ 2 × S2.
6. The ceramic helical toothed roller bar according to claim 4, characterized in that, Along the axial direction, the width of the first top surface is either constant or gradually increases.
7. The ceramic helical toothed roller bar according to claim 5, characterized in that, The main body of the roller has two ends, namely a first section and a second section. The width of the first top surface of the first section is W1, and the width of the first top surface of the second section is W2, which satisfies: W1=1×W2~1.2×W2.
8. The ceramic helical toothed roller bar according to claim 1, characterized in that, The cross-section of the inclined groove is trapezoidal or fan-shaped, and the width of the side of the cross-section closer to the center of the roller body is smaller than the width of the side farther from the center of the roller body. The bottom of the inclined groove is flat or curved.
9. The ceramic helical toothed roller bar according to claim 5, characterized in that, The depth of the inclined groove is 1mm to 4mm, the width is 2mm to 8mm, and the spacing between adjacent inclined grooves is 5mm to 20mm.
10. The ceramic helical toothed roller bar according to claim 1, characterized in that, The plurality of the inclined grooves are arranged at equal intervals along the circumference of the main body of the roller; The inclined groove and the main body of the roller are integrally formed; The main body of the roller is made of one or more of the following materials: alumina, silicon nitride, silicon carbide, mullite, or cordierite.