A drying roller for para-aramid fibers

Abstract

This application provides a drying roller for para-aramid fibers, including a drying roller body and a transmission assembly connected to the drying roller body. The transmission assembly includes a drive shaft, a pulley connected to one end of the drive shaft, and an external power source connected to the pulley. A tensioning assembly is installed at the end of the drive shaft connected to the pulley. The tensioning assembly includes an inner conical ring, an outer conical ring, and a fastening bolt connecting the inner and outer conical rings. The outer surface of the inner conical ring is a first conical surface, and the inner surface of the outer conical ring is a second conical surface that matches the first conical surface. The first end faces of the inner and outer conical rings are connected by the fastening bolt. The tensioning assembly also includes a sealing member disposed in the inner hole of the pulley. An axially extending protrusion is provided on the second end face of the outer conical ring, and the protrusion engages with a groove on the end face of the sealing member. This application effectively improves the reliability of the connection between the drying roller and the pulley through the conical surface engagement of the inner and outer conical rings of the tensioning assembly and the engagement between the protrusion on the outer conical ring and the groove on the sealing member.

Description

Technical Field

[0001] This application relates to the field of spinning equipment technology, specifically to a drying roller for para-aramid fibers. Background Technology

[0002] Currently, various methods are commonly used in industry to dry fiber materials, among which drying rollers are one of the most widely used and efficient drying devices. Drying rollers provide heat through internal steam, heat transfer oil, or electric heating to raise the roller surface to a certain temperature. When wet fibers come into contact with the drying roller surface, heat is transferred to the fibers through conduction, causing the moisture or solvent in the fibers to evaporate, thus achieving the drying purpose.

[0003] The drying roller is driven to rotate by a transmission device (such as belt drive or gear drive) to ensure stable operation and uniform heating of the fibers during the drying process. Belt drive devices typically use keyed connections. While keyed connections can achieve a certain degree of torque transmission, wear can easily occur between the key and keyway during long-term high-speed rotation and frequent start-stop operations, leading to loosening of the connection. This affects the stability of power transmission, causing fluctuations in the drying roller's rotation speed, ultimately impacting the drying uniformity of para-aramid fibers, and may even cause the pulley to detach from the drying roller, resulting in poor reliability. Furthermore, since the drying process of para-aramid fibers usually takes place in a high-temperature and high-humidity environment, the connection between the drying roller and the pulley is susceptible to erosion by moisture and corrosive gases, leading to rust and corrosion, further weakening the reliability of the connection.

[0004] Therefore, there is an urgent need to develop a new type of para-aramid fiber drying roller to solve the technical problems in the connection between the drying roller and the pulley. Utility Model Content

[0005] The purpose of this invention is to provide a para-aramid fiber drying roller that can improve the reliability of the connection between the drying roller and the pulley and improve the working efficiency of the drying roller.

[0006] This application is achieved through the following technical solution, specifically:

[0007] A drying roller for para-aramid fibers includes a drying roller body and a transmission assembly connected to the drying roller body. The transmission assembly includes a drive shaft, a pulley connected to one end of the drive shaft, and an external power source connected to the pulley. A tensioning assembly is installed at the end of the drive shaft connected to the pulley. The tensioning assembly includes an inner conical ring, an outer conical ring, and a fastening bolt connecting the inner and outer conical rings. The outer surface of the inner conical ring is a first conical surface, and the inner surface of the outer conical ring is a second conical surface that matches the first conical surface. The first end faces of the inner and outer conical rings are connected by the fastening bolt. The tensioning assembly also includes a sealing member disposed in the inner hole of the pulley. An axially extending protrusion is disposed on the second end face of the outer conical ring, and the protrusion cooperates with a groove opened on the end face of the sealing member.

[0008] In this design, the inner and outer conical rings of the expansion assembly, through their conical surface engagement and the axial clamping force applied by the fastening bolts, undergo radial elastic deformation and are tightly pressed between the drive shaft and the inner hole of the pulley, forming a keyless friction-type torque transmission structure. This avoids the wear and loosening problems of traditional keyed connections, ensuring the stability of power transmission, stabilizing the drying roller speed, and thus ensuring uniform drying of the aligned aramid fibers. The sealing element in the expansion assembly and the engagement of the protrusions on the outer conical ring with the sealing element's groove provide additional sealing and fixing functions, effectively preventing external moisture, water vapor, or corrosive gases from intruding into the connection between the drive shaft and the pulley, improving the corrosion resistance and long-term reliability of the connection.

[0009] As an improvement of the outer conical ring in this application, the protrusions are uniformly arranged on the second end face of the outer conical ring along the circumferential direction, and the outer conical ring has a first expansion groove on both sides of the protrusions along the axial direction.

[0010] Furthermore, the inner wall of the groove and the outer wall of the protrusion are fitted with a clearance, and the clearance allows the outer conical ring to expand radially.

[0011] Furthermore, the sealing component is a cylindrical structure, and each sealing component is provided with a second expansion groove along the longitudinal direction.

[0012] As an improvement to the bump in this application, the bump and the second end face of the outer conical ring are stepped.

[0013] Furthermore, an elastic gasket is provided at the position where the end face of the sealing component contacts the second end face of the outer conical ring.

[0014] The beneficial effects of this application are as follows:

[0015] The solution in this application utilizes the conical surface fit between the inner and outer conical rings of the expansion assembly and the axial clamping force applied by the fastening bolts. This causes the inner and outer conical rings to elastically deform radially and tightly press against the inner hole of the drive shaft and pulley, forming a keyless friction-type torque transmission structure. This avoids the wear and loosening problems of traditional keyed connections, ensures the stability of power transmission, stabilizes the drying roller speed, and thus ensures uniform drying of the aligned aramid fibers. The sealing element in the expansion assembly and the fit between the protrusion and the groove of the sealing element on the outer conical ring provide additional sealing and fixing functions, effectively preventing external moisture, water vapor, or corrosive gases from intruding into the connection between the drive shaft and pulley, improving the corrosion resistance and long-term reliability of the connection.

[0016] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a para-aramid fiber drying roller in an embodiment of this application;

[0018] Figure 2 This is a cross-sectional structural diagram of the tensioning component in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the outer conical ring in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the sealing component in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Drying roller body; 2. Transmission assembly; 21. Transmission shaft; 22. Pulley; 3. Expansion assembly; 31. Inner conical ring; 32. Outer conical ring; 33. Fastening bolt; 34. Sealing component; 321. Protrusion; 341. Groove; 322. First expansion groove; 342. Second expansion groove. Detailed Implementation

[0023] The following will be combined with the appendix Figures 1-2 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] In view of the problems existing in the background technology or products, Figure 1 A schematic diagram of the structure of a para-aramid fiber drying roller according to an embodiment of this application is shown; Figure 2 A partial cross-sectional structural schematic diagram of the expansion assembly in an embodiment of this application is shown. For example... Figure 1 and 2 As shown, this application provides a para-aramid fiber drying roller, including a drying roller body 1 and a transmission assembly 2 connected to the drying roller body 1. The transmission assembly 2 includes a transmission shaft 21, a pulley 22 connected to one end of the transmission shaft 21, and an external power source connected to the pulley 22.

[0025] A tensioning assembly 3 is installed at one end of the drive shaft 21 and the pulley 22. The tensioning assembly 3 includes an inner conical ring 31, an outer conical ring 32, and a fastening bolt 33 connecting the inner conical ring 31 and the outer conical ring 32. The outer surface of the inner conical ring 31 is a first conical surface, and the inner surface of the outer conical ring 32 is a second conical surface that matches the first conical surface. The first end faces of the inner conical ring 31 and the outer conical ring 32 are connected by the fastening bolt 33. The tensioning assembly 3 also includes a sealing member 34 disposed in the inner hole of the pulley 22. An axially extending protrusion 321 is disposed on the second end face of the outer conical ring 32. The protrusion 321 cooperates with the groove 341 opened on the end face of the sealing member 34.

[0026] Specifically, the aforementioned tensioning assembly 3 is installed at the connection between the drive shaft 21 and the pulley 22. Specifically, an inner conical ring 31 is fitted onto the drive shaft 21, with the first conical surface of the inner conical ring 31 facing the inner hole of the pulley 22. At the same time, an outer conical ring 32 is fitted onto the inner conical ring 31, so that the second conical surface of the outer conical ring 32 is tightly fitted against the first conical surface of the inner conical ring 31, and the inner surface of the inner conical ring 31 is radially and tightly pressed against the outer surface of the drive shaft 21, while the inner hole wall of the pulley 22 is tightly pressed against the outer surface of the outer conical ring 32. The fastening bolt 33 passes through the first end face of the inner conical ring 31 and the outer conical ring 32 and is tightened. The first end face of the inner conical ring 31 and the outer conical ring 32 are integrally provided with flanges. Threaded holes are opened at corresponding positions on the flanges. By placing the fastening bolt 33 in the threaded holes and tightening it, an axial clamping force is generated between the inner conical ring 31 and the outer conical ring 32, causing the conical surfaces of the inner conical ring 31 and the outer conical ring 32 to slide relative to each other. The lower part of the outer conical ring 32 undergoes radial elastic deformation, thereby tightly pressing it between the inner hole of the drive shaft 21 and the inner hole of the pulley 22, realizing a reliable connection between the drive shaft 21 and the pulley 22.

[0027] The sealing element 34 is made of a sealing and corrosion-resistant material and is installed in the inner hole of the pulley 22. Its shape matches the inner hole of the pulley 22, forming a tight fit. A through hole is provided at the center of the sealing element 34. The inner diameter of the through hole is slightly larger than the outer diameter of the drive shaft 21, allowing the drive shaft 21 to pass smoothly. Axially extending protrusions 321 are provided on the second end face of the outer conical ring 32. The number, shape, and distribution of these protrusions 321 can be designed according to actual needs; for example, there can be one or more, and they can be strip-shaped, block-shaped, etc. These protrusions 321 extend from the second end face of the outer conical ring 32 and mate with grooves provided on the end face of the sealing element 34. The shape of the groove matches the shape of the protrusion 321; for example, it can be a strip groove, a square groove, etc. Optionally, to reduce wear and facilitate engagement, the edges of the protrusions 321 and the grooves 341 can be chamfered or rounded. Once the expansion assembly is installed and tightened, the protrusion 321 of the outer conical ring 32 will embed into the groove of the sealing component 34, forming an integrated structure. This fit not only serves a positioning function, preventing the outer conical ring 32 from shifting under vibration or radial force, but more importantly, the interlocking of the protrusion 321 and the groove forms a physical barrier, enhancing the sealing performance and effectively preventing external moisture, water vapor, or corrosive gases from entering through the inner hole of the pulley along the connection between the drive shaft and the pulley.

[0028] Figure 3 A schematic diagram of the outer conical ring in an embodiment of this application is shown. Figure 3 As shown, in one implementation, the protrusions 321 are uniformly arranged on the second end face of the outer conical ring 32 along the circumferential direction, and the outer conical ring 32 has first expansion grooves 322 axially formed on both sides of the protrusions 321.

[0029] Specifically, the first expansion groove 322 further enhances the elastic deformation capability of the outer cone ring 32. Under the same tightening force, the outer cone ring 32 can expand outward better, thereby pressing more tightly against the inner wall of the pulley 22, enhancing the radial locking force, and further improving the connection reliability and torque transmission capability of the expansion assembly 3.

[0030] Preferably, the inner wall of the groove 341 and the outer wall of the protrusion 321 are fitted with a clearance, and this clearance allows the outer conical ring 32 to expand radially. When the outer conical ring 32 undergoes radial expansion deformation under axial clamping force, the protrusion 321 may be restricted by the inner wall of the groove 341 and unable to deform sufficiently, resulting in the outer conical ring 32 not being tightly pressed between the drive shaft 21 and the inner hole of the pulley 22, affecting the reliability of the connection and the sealing performance. However, by setting a clearance that allows the outer conical ring 32 to expand radially, the protrusion 321 can elastically deform within the clearance range when the outer conical ring 32 expands radially, better achieving a tight fit between the outer conical ring 32 and the inner hole of the pulley 22, as well as the inner conical ring 31, while also ensuring the fit between the protrusion 321 and the groove 341. Although a clearance is introduced, the protrusion 321 still maintains contact with the groove 341 and provides a certain positioning and sealing function.

[0031] Figure 4 A schematic diagram of the sealing component in an embodiment of this application is shown. Figure 4 As shown, preferably, the sealing member 34 is a cylindrical structure, and each sealing member 34 is provided with a second expansion groove 342 along the longitudinal direction. The number and position of the second expansion grooves 342 can be designed as needed. Their function is to provide a certain radial contraction space when the sealing member 34 is pressed into the inner hole of the pulley, which facilitates installation and adapts to the irregularity of the inner hole of the pulley, while enhancing its sealing performance.

[0032] In one implementation, the protrusion 321 and the second end face of the outer conical ring 32 are stepped. The stepped shape increases the contact area and contact depth between the protrusion 321 and the groove 341. When the outer conical ring 32 expands radially under axial clamping force, the stepped protrusion 321 can better cooperate with the groove 341 on the end face of the sealing member 34, making the cooperation between the two more stable and more effectively preventing external moisture, water vapor or corrosive gas from entering through the inner hole of the pulley along the connection between the drive shaft and the pulley.

[0033] Preferably, an elastic gasket is provided at the contact point between the end face of the sealing member 34 and the second end face of the outer conical ring 32. When the expansion assembly is installed and tightened, the elastic gasket will undergo elastic deformation due to the compression of the outer conical ring 32 and the sealing member 34. This elastic deformation can fill any small gaps that may exist between the outer conical ring 32 and the sealing member 34, further enhancing the sealing performance. At the same time, the elastic gasket also acts as a buffer, reducing the rigid contact between the outer conical ring 32 and the sealing member 34, reducing wear caused by vibration or impact, and improving the stability and service life of the entire expansion assembly.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drying roller for para-aramid fibers, comprising a drying roller body (1) and a transmission assembly (2) connected to the drying roller body (1), the transmission assembly (2) comprising a transmission shaft (21), a pulley (22) connected to one end of the transmission shaft (21), and an external power source connected to the pulley (22); characterized in that, A tensioning assembly (3) is installed at one end of the drive shaft (21) and the pulley (22). The tensioning assembly (3) includes an inner conical ring (31), an outer conical ring (32), and a fastening bolt (33) connecting the inner conical ring (31) and the outer conical ring (32). The outer surface of the inner conical ring (31) is a first conical surface, and the inner surface of the outer conical ring (32) is a second conical surface that matches the first conical surface. The first end faces of the inner conical ring (31) and the outer conical ring (32) are connected by the fastening bolt (33). The tensioning assembly (3) also includes a sealing member (34) disposed in the inner hole of the pulley (22). An axially extending protrusion (321) is provided on the second end face of the outer conical ring (32). The protrusion (321) cooperates with the groove (341) opened on the end face of the sealing member (34).

2. A para-aramid fiber drying roll as claimed in claim 1, characterized in that, The protrusion (321) is uniformly arranged on the second end face of the outer conical ring (32) along the circumferential direction, and the outer conical ring (32) has a first expansion groove (322) on both sides of the protrusion (321) along the axial direction.

3. A para-aramid fiber drying roll as claimed in claim 2, characterized in that, The inner wall of the groove (341) and the outer wall of the protrusion (321) are fitted with a clearance, and the clearance allows the outer conical ring (32) to expand radially.

4. A para-aramid fiber drying roll as claimed in claim 3, wherein, The sealing component (34) is a cylindrical structure, and each sealing component (34) is provided with a second expansion groove (342) along the longitudinal direction.

5. A para-aramid fiber drying roll as claimed in claim 1, wherein, The protrusion (321) and the second end face of the outer conical ring (32) are stepped.

6. A para-aramid fiber drying roll as claimed in claim 5, characterized in that, An elastic gasket is provided at the position where the end face of the sealing member (34) contacts the second end face of the outer cone ring (32).

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