Compression roller structure for calendaring and compression roller mechanism

Abstract

The invention discloses a pressing roller structure and a pressing roller mechanism for calendering, and relates to the technical field of pressing rollers, the pressing roller structure comprises a roller body, a rolling area of the roller body comprises a first annular area and a second annular area, and the first annular area and the second annular area are sequentially arranged in the axial direction of the roller body; flow channels are formed in the side wall of the roller body in a surrounding mode, the flow channels at least comprise first flow channels located in the first annular area, and the first flow channels are used for introducing fluid so as to adjust the temperature of the first annular area. The device has the effect of improving the calendering uniformity of the compression roller.

Description

Technical Field

[0001] This application relates to the technical field of pressure rollers, and in particular to a pressure roller structure and pressure roller mechanism for calendering. Background Technology

[0002] Calendering refers to the process by which materials are squeezed and stretched through the gap between multiple counter-rotating rollers to become thin sheet products.

[0003] Due to the speed difference, two adjacent pressure rollers generate a significant amount of frictional heat, causing the roller diameter to change due to thermal expansion. The roller's structure results in uneven heat dissipation across its different areas: heat dissipates faster and is relatively cooler at the ends near the bearing housings, while heat dissipates more slowly and is relatively warmer in the middle. This temperature inconsistency leads to inconsistent roller diameters across different sections, resulting in uneven thickness in the calendered product and poor calendering quality. Summary of the Invention

[0004] In order to improve the problem of uneven calendering caused by inconsistent roller diameter due to thermal expansion, this application provides a calendering roller structure and roller mechanism.

[0005] In a first aspect, this application provides a pressure roller structure for calendering, which adopts the following technical solution: A calendering roller structure includes a roller body, wherein the roller body has a rolling pressing area including a first annular region and a second annular region, and the first annular region and the second annular region are arranged sequentially along the axial direction of the roller body. The roller body sidewall is provided with flow channels, the flow channels including at least a first flow channel located in the first annular region, the first flow channel being used to introduce fluid to regulate the temperature of the first annular region.

[0006] By adopting the above technical solution, the roller body includes at least two regions with different temperatures, namely a first annular region and a second annular region. A first flow channel is set separately in at least the first annular region. Fluid is introduced into the first flow channel to adjust the temperature of the first annular region, so that the temperatures of the first annular region and the second annular region tend to be consistent. This alleviates the situation where the roller diameter is inconsistent due to thermal expansion, which leads to uneven calendering and improves the uniformity of the calendered product.

[0007] Optionally, the flow channel further includes a second flow channel disposed in the second annular region, the second flow channel being used to introduce fluid to regulate the temperature of the second annular region.

[0008] By adopting the above technical solution, there are at least two regions with different temperatures on the roller body. By setting the first flow channel and the second flow channel in the first annular region and the second annular region respectively, the temperature of the first annular region and the second annular region can be adjusted simultaneously, thereby enabling the temperature difference between the first annular region and the second annular region to be reduced rapidly, and further improving the consistency of the axial thermal expansion of the roller body.

[0009] Optionally, the rolling pressing area of ​​the roller body further includes a third annular region, which is located on the side of the second annular region away from the first annular region, and the flow channel further includes a third flow channel located within the third annular region, which is used to introduce fluid to regulate the temperature of the third annular region.

[0010] By adopting the above technical solution, setting at least a first annular region, a second annular region, and a third annular region can divide the roller body into more regions. A flow channel is set separately in each region. The temperature of each region is adjusted through multiple flow channels, thereby achieving more precise adjustment of the temperature of each section of the roller body. This ensures that the thermal expansion of each region along the length of the roller body is consistent, enabling dynamic and rapid adjustment of the temperature of each region of the roller body.

[0011] Optionally, it also includes multiple inlet channels, the first end of which is connected to the upstream of the first flow channel, the second flow channel and the third flow channel in a one-to-one correspondence.

[0012] By adopting the above technical solution, the first, second and third flow channels are each equipped with an inlet channel, so that fluid can be introduced into each flow channel independently, thereby realizing the independent temperature control function of each flow channel, and thus enabling more precise control of the temperature of each area of ​​the roller body.

[0013] Optionally, the flow channel includes multiple first unit channels extending axially along the roller body and multiple second unit channels extending circumferentially along the roller body. The multiple first unit channels are spaced apart circumferentially along the roller body, and the multiple first unit channels and the multiple second unit channels are alternately connected.

[0014] By adopting the above technical solution, the flow channels are arranged in the above shape, which allows the flow channels to evenly surround the roller body, thereby adjusting the overall temperature of the roller body more evenly. On the other hand, the first unit channel extends along the axial direction of the roller body, making the fluid temperature in the first unit channel tend to be uniform. When the roller body rolls the product, the product is in contact with various parts of the roller body surface in the same axial direction at the same time. Therefore, according to the flow channel arrangement of this application, the temperature of each area in contact with the roller body can be made more uniform.

[0015] Optionally, the roller body further includes connecting portions located at both ends, the connecting portions being used for connection with external mechanisms; The second ends of the plurality of inlet channels extend to the sidewall of the same connecting part, and the second ends of the plurality of inlet channels are arranged sequentially along the axial direction of the roller body.

[0016] By adopting the above technical solution, the second ends of multiple inlet channels are extended to the side wall of the connecting part and arranged sequentially along the axial direction of the roller body, so that the second ends of multiple inlet channels are staggered, thereby enabling multiple inlet channels to simultaneously and independently allow fluid to enter. When calendering products using a pressure roller structure, the pressure roller structure needs to rotate, but at the same time, fluid needs to be stably introduced into each flow channel. The second end of the inlet channel is set on the side wall of the connecting part, so that the drive mechanism that drives the pressure roller structure to rotate can be connected to the end of the connecting part to drive the pressure roller structure to rotate without interfering with the inlet channel used to introduce fluid.

[0017] Optionally, the sidewall of the connecting part is provided with multiple concentric guide grooves along the axial direction of the roller body, and each of the multiple concentric guide grooves is connected to the second end of the multiple inlet channels; the guide grooves are used to communicate with the external mechanism and to introduce fluid into the flow channel.

[0018] By adopting the above technical solution, a guide groove is opened outside the connecting part, and each guide groove is connected to an inlet channel. This allows the fluid to be introduced into the flow channel by introducing the fluid into any position of the guide groove on the periphery when the fluid is introduced into the pressure roller structure. Therefore, when the pressure roller structure rotates, it can still achieve the function of stably introducing fluid into the roller body.

[0019] Optionally, a sleeve is provided outside the connecting part, the sleeve is arranged around and rotatably on the periphery of the connecting part, and multiple flow guide ports are opened on the sleeve, the multiple flow guide ports are connected to multiple flow guide grooves one by one.

[0020] By adopting the above technical solution, when the pressure roller structure is calendering products, the pressure roller structure rotates relative to the sleeve under the drive of the external device. When adjusting the temperature, it is only necessary to introduce fluid into the pressure roller structure through the guide port. The fluid flows into the guide groove, enters the inlet channel through the guide groove, and finally enters the flow channel, thereby realizing the function that the rotation of the pressure roller structure and the introduction of fluid into the pressure roller structure do not interfere with each other.

[0021] Secondly, this application provides a pressure roller mechanism, including the above-mentioned pressure roller structure, and adopts the following technical solution: A pressure roller mechanism further includes a control device, the control device comprising: A servo proportional valve, wherein the output port of the servo proportional valve is connected to the first flow channel; A temperature sensor is used to measure the temperature of the first annular region and the second annular region; The controller, electrically connected to the servo proportional valve and the temperature sensor, is used to determine the temperature difference between the first annular region and the second annular region based on the temperatures of the first annular region and the second annular region, and to control the opening degree of the servo proportional valve based on the temperature difference.

[0022] By adopting the above technical solution, fluid is introduced into the flow channel, and the fluid carries away the temperature inside the roller, thereby reducing the temperature of the roller. The servo proportional valve can adjust the flow rate of the fluid, thereby accelerating or slowing down the adjustment speed of the roller temperature. After the temperature sensor measures the temperature of each area, it transmits the signal to the controller and sends a command to the corresponding servo proportional valve of each area to adjust the fluid flow rate in the flow channel according to the temperature difference of each area. In the end, the temperature of each area of ​​the roller tends to be consistent, thereby controlling the same thermal expansion in each area of ​​the roller to improve the uniformity of calendering.

[0023] Optionally, the control device further includes a reversing valve, the output port of which is connected to the input port of the servo proportional valve, and the reversing valve includes a first input port and a second input port, the first input port being used to introduce fluid at a first temperature, and the second input port being used to introduce fluid at a second temperature, wherein the first temperature is higher than the second temperature. The controller is also electrically connected to a reversing valve for introducing fluid at the second temperature into the servo proportional valve when the temperature difference is less than a threshold value; and for introducing fluid at the first temperature into the servo proportional valve when the temperature is greater than or equal to the threshold value.

[0024] By adopting the above technical solution, the reversing valve can adjust the temperature of the fluid entering the flow channel. After the temperature is measured by the temperature sensor, if the temperature difference between different areas is large, adjusting the temperature of the fluid in the flow channel by only using the servo proportional valve is inefficient. By setting the reversing valve, the temperature of the fluid entering the flow channel can be adjusted more efficiently, and the length of the uneven section of the calendered product can be shortened.

[0025] In summary, this application includes at least one of the following beneficial effects: 1. This application sets multiple annular regions on the roller structure and sets a separate flow channel in each annular region. The temperature of each section of the roller structure surface is controlled by the multiple flow channels, thereby achieving the uniformity of the roller surface temperature as much as possible and alleviating the problem of inconsistent roller diameters in different sections of the roller caused by thermal expansion. 2. The roller structure of this application can be set with more annular regions. The more annular regions are set, the more precise the temperature adjustment of each section of the roller can be. Since the heat dissipation of each section of the roller is uneven, the thermal expansion of each section is different. And the thermal expansion of each section is not linearly proportional. Therefore, multiple independently controlled annular regions can achieve more precise temperature adjustment of each section of the roller. 3. Each flow channel is independently connected to the inlet channel, thereby enabling independent temperature control of each flow channel. This allows for temperature adjustment of each section based on the actual condition of the roller body, quickly achieving uniform temperature in the axial direction of the roller body. 4. Each annular area is independently connected to a control device, which includes a servo proportional valve for adjusting fluid flow and a reversing valve for adjusting fluid temperature. Two types of loops for adjusting fluid temperature are set up, which can realize rapid adjustment of roller temperature under various conditions and improve adjustment efficiency. Attached Figure Description

[0026] Figure 1 This is a plan view of the pressure roller structure of Embodiment 3 of this application; Figure 2 This is a plan view of the flow channel after it has been unfolded according to this application; Figure 3 This is a schematic diagram of the outer flow channel arrangement of the roller body in Embodiment 1 of this application and its corresponding cross-sectional view of the roller body; Figure 4 This is a schematic diagram of the outer flow channel arrangement of the roller body in Embodiment 2 of this application and its corresponding cross-sectional view of the roller body; Figure 5 This is a schematic diagram of the outer flow channel arrangement of the roller body in Embodiment 3 of this application and its corresponding cross-sectional view of the roller body; Figure 6 This is a schematic diagram of the control device in Embodiment 4 of this application, using the first flow channel as an example; Figure 7 This is a schematic diagram of the control device in Embodiment 5 of this application, using the first flow channel as an example.

[0027] Explanation of reference numerals in the attached drawings: 1. Roller body; 11. First annular region; 12. Second annular region; 13. Third annular region; 14. Flow channel; 141. First unit channel; 142. Second unit channel; 143. First flow channel; 144. Second flow channel; 145. Third flow channel; 15. Inlet channel; 16. Outlet channel; 17. Connecting part; 171. Guide groove; 2. Roller surface layer; 3. Sleeve; 31. Guide port; 4. Control device; 41. Servo proportional valve; 42. Temperature sensor; 43. Reversing valve. Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] This application discloses a calendering roller structure, referring to... Figure 1 A calendering roller structure includes a roller body 1 with multiple annular regions arranged along the axial direction of the roller body 1. Each annular region has a flow channel 14 surrounding its sidewall. By introducing fluid into the flow channel 14, the temperature of the corresponding annular region is adjusted. After the flow channel 14 on the surface of the roller body 1 is processed, a roller surface layer 2 is pressed and formed on the outside of the roller body 1. The pressed roller surface layer 2 is tightly bonded to the roller body 1, and calendering is achieved through contact between the roller surface layer 2 and the product.

[0030] Reference Figure 1 and Figure 2 The flow channels 14 are evenly distributed on the surface of the roller body 1. The flow channels 14 can be arranged in various ways, such as spiraling around the side wall of the roller body 1 and extending along the axial direction of the roller body 1. This application provides a preferred embodiment of the flow channel 14 arrangement, in which each flow channel 14 includes multiple first unit channels 141 extending along the axial direction of the roller body 1 and multiple second unit channels 142 extending along the circumferential direction of the roller body 1. The multiple first unit channels 141 are spaced apart along the circumferential direction of the roller body 1, and the multiple first unit channels 141 and the multiple second unit channels 142 are alternately connected.

[0031] Reference Figure 1 and Figure 2 When the pressure roller structure calenders the product, the product comes into contact with the side of the pressure roller structure on the same axial direction at the same time as the pressure roller structure. The flow channel 14 is arranged according to the above preferred embodiment, that is, the first unit channel 141 is arranged along the axial direction of the pressure roller structure. The fluid flows along the axial direction of the pressure roller structure, so that the fluid temperature at the first channel unit is closer. This reduces the effect of reducing the fluid adjustment roller body 1 temperature due to the large temperature difference between two adjacent points on the same axis caused by the path arrangement of the flow channel 14.

[0032] Reference Figure 1 and Figure 3 Each flow channel 14 is individually connected to an inlet channel 15 and an outlet channel 16. The first end of the inlet channel 15 is connected to the upstream port of the flow channel 14. The first end of the outlet channel 16 is connected to the downstream port of the flow channel 14. By individually introducing fluid into each flow channel 14, independent zoned temperature control of multiple annular regions of the roller body 1 can be achieved.

[0033] Reference Figure 1 and Figure 3The roller body 1 also includes connecting portions 17 located at both ends. No annular area is provided outside the connecting portions 17. The second ends of multiple inlet channels 15 extend from inside the roller body 1 to the side wall of the connecting portion 17 at the same end of the roller body 1, and the second ends of multiple outlet channels 16 extend from inside the roller body 1 to the side wall of the connecting portion 17 at the other end of the roller body 1. The second ends of the multiple inlet channels 15 or outlet channels 16 are arranged sequentially along the axial direction of the roller body 1. Multiple concentric guide grooves 171 are also provided parallel to each other along the axial direction of the roller body 1 on the connecting portions 17, and each concentric guide groove 171 corresponds to and communicates with the second ends of the multiple inlet channels 15 or outlet channels 16.

[0034] Reference Figure 1 and Figure 3 A sleeve 3 is rotatably sleeved around the connecting part 17. The sleeve 3 and the side wall of the connecting part 17 are sealed together. Multiple guide ports 31 are opened on the sleeve 3 along the axial direction of the roller body 1. The guide ports 31 are respectively connected to multiple guide grooves 171. When the pressure roller structure is used for calendering, the drive mechanism that drives the pressure roller structure to rotate is fixedly connected to both ends of the pressure roller structure, thereby driving the pressure roller structure to rotate around its own central axis. When it is necessary to introduce fluid into the flow channel 14 to adjust the temperature of the roller body 1, the fluid storage device is connected to multiple guide ports 31 respectively. The fluid flows from the guide ports 31 into the guide grooves 171, and then further flows into the flow channel 14 along the inlet channel 15. After passing through the flow channel 14, it flows out along the outlet channel 16, the guide grooves 171 at the other end of the roller body 1, and the guide ports 31, thus forming multiple independent fluid flow paths and realizing individual temperature control of each area of ​​the roller body 1.

[0035] The arrangement of the annular region in this application includes the following various embodiments: Example

[0036] Reference Figure 3 The roller body 1 has only a first annular region 11. The flow channel 14 includes a first flow channel 143 disposed within the first annular region 11. The first annular region 11 can alleviate the problem of uneven roller diameter caused by thermal expansion of the roller body 1 by being disposed in any section of the roller body 1. Preferably, the first annular region 11 is disposed in the middle of the roller body 1. Since the heat dissipation is poor in the middle of the roller body 1 and good at both ends, by introducing fluid into the first flow channel 143 to reduce the temperature in the middle of the roller body 1, the temperature in the middle will approach the temperature at both ends, thereby adjusting the roller diameter of each region of the roller body 1 to be more uniform. Example

[0037] Reference Figure 4The difference between Embodiment 2 and Embodiment 1 is that a second annular region 12 is further provided inside the roller body 1, and the flow channel 14 includes a second flow channel 144 disposed within the second annular region 12. The first annular region 11 and the second annular region 12 are arranged along the axial direction of the roller body 1. The thermal expansion rates of the first annular region 11 and the second annular region 12 are different. The first annular region 11 and the second annular region 12 can be positioned at any position on the roller body 1 and can be set to any length to adjust the temperature of the roller body 1, making the temperature of the roller body 1 more uniform along the axial direction, thereby alleviating the problem of uneven thickness of the calendered product.

[0038] Preferably, the first annular region 11 and the second annular region 12 are symmetrically arranged on both sides of the roller body 1. Since the heat dissipation is faster on both sides of the roller body 1 and slower in the middle, the temperature of the roller body 1 is increased by introducing fluid into the first flow channel 143 and the second flow channel 144, so that the temperature on both sides is more consistent with the temperature in the middle of the roller body 1. This makes the thermal expansion degree of each region of the roller body 1 more similar, and further improves the problem of uneven calendering of the pressure roller structure. Example

[0039] Reference Figure 5 The difference between Embodiment 3 and Embodiment 2 is that a third annular region 13 is further provided inside the roller body 1. The third annular region 13 is located on the side of the second annular region 12 away from the first annular region 11, and the flow channel 14 also includes a third flow channel 145 located in the third annular region 13. The first flow channel 143, the second flow channel 144, and the third flow channel 145 are arranged sequentially along the axial direction of the roller body 1. When the thermal expansion of the roller body 1 is uneven, resulting in uneven calendering thickness, the fluids in the first flow channel 143, the second flow channel 144, and the third flow channel 145 can be adjusted respectively, thereby adjusting the temperature of the surface of the roller body 1.

[0040] Compared to Examples 1 and 2, Example 3 achieves more precise adjustment of the surface temperature of the roller body 1. Furthermore, this application can set more than three annular regions, each with an independent inlet channel 15, flow channel 14, and outlet channel 16, allowing for independent fluid flow to regulate the surface temperature of the roller body 1. The more annular regions there are, the more precise the temperature regulation of the roller body 1 surface, resulting in a more uniform thickness of the calendered product.

[0041] The implementation principle of a calendering roller structure in this application embodiment is as follows: when the roller structure is performing calendering work, if the heat dissipation of each area of ​​the calendering structure is uneven, resulting in uneven thermal expansion of each area along the axial direction of the roller body 1, fluid can be introduced into each annular area to adjust the temperature of each annular area, thereby making the axial temperature of the roller body 1 more uniform and improving the uniformity of the thickness of the calendered product.

[0042] When adjusting the temperature of each annular region using the pressure roller structure of this application, the fluid is first discharged into the guide groove 171 through the guide port 31. The fluid in the guide groove 171 can flow into the inlet channel 15 and continue to flow into the flow channel 14, thereby adjusting the temperature of the roller body 1 surface. Finally, the fluid is discharged from the roller body 1 along the outlet channel 16. The inlet channel 15, flow channel 14, and outlet channel 16 of each annular region are independently set to achieve individual temperature control of each annular region, thereby controlling the thermal expansion of each annular region and making the axial thermal expansion area of ​​the roller body 1 consistent.

[0043] This application also discloses a pressure roller mechanism. Example

[0044] Reference Figure 1 and Figure 6 A pressure roller mechanism includes the aforementioned calendering pressure roller structure and a control device 4. The control device 4 includes a servo proportional valve 41, a temperature sensor 42, and a controller. Specifically, each annular region is independently equipped with a control device 4, and the servo proportional valve 41 is connected to a flow channel 14 to control the flow rate of fluid entering the flow channel 14. The temperature sensor 42 is located on the periphery of the pressure roller structure to measure the temperature of the corresponding annular region. The controller is electrically connected to the servo proportional valve 41 and the temperature sensor 42, and controls the opening degree of the servo proportional valve 41 according to the temperature of each annular region measured by the temperature sensor 42.

[0045] Reference Figure 6 If the temperature of a certain annular region is higher than the target temperature value set in the controller, the flow rate of the fluid in the flow channel 14 is increased based on the temperature difference between the measured temperature of that annular region and the target temperature value. This allows the fluid to more quickly remove heat from the roller body 1, achieving rapid cooling. Conversely, if the temperature of a certain annular region is higher than the target temperature value set in the controller, the flow rate of the fluid in the flow channel 14 is decreased based on the temperature difference between the measured temperature of that annular region and the target temperature value. This reduces heat loss in the corresponding annular region, resulting in a more uniform temperature across all annular regions of the roller body 1. It is important to emphasize that the target temperature value in the controller is not a fixed value. The target temperature value is derived from the temperature differences measured in each annular region of the roller body 1, aiming to achieve a more rapid uniform temperature across all regions of the roller body 1. The value is adjusted in real time based on the actual stability of each annular region of the roller body 1. Example

[0046] Reference Figure 1 and Figure 7The difference between Embodiment 5 and Embodiment 4 is that the control device 4 further includes a reversing valve 43. The output port of the reversing valve 43 is connected to the input port of the servo proportional valve 41 and is used to adjust the temperature of the fluid entering the flow channel 14. Specifically, the reversing valve 43 includes a first input port and a second input port, which are used to introduce fluids of different temperatures, respectively.

[0047] Reference Figure 7 The controller is also electrically connected to the reversing valve 43. The controller determines the temperature difference between the highest and lowest temperature annular areas based on the measured temperature of each annular area, and sets a target difference value in the controller. If the determined temperature difference is not greater than the target difference value, only the servo proportional valve 41 is driven to run, and the flow rate of the fluid in the flow channel 14 is controlled to adjust the temperature of the roller 1.

[0048] Reference Figure 7 If the determined temperature difference is greater than the target difference, adjusting the roller 1 temperature solely by controlling the fluid flow rate in the flow channel 14 via the servo proportional valve 41 takes a long time, resulting in a longer uneven thickness band in the calendered product and affecting the product yield. If the determined temperature difference is greater than the target difference, the reversing valve 43 is activated, adjusting the fluid temperature entering the flow channel 14 to quickly regulate the temperature within the flow channel 14. Compared to changing the fluid flow rate in the flow channel 14 to adjust the roller 1 temperature, changing the fluid temperature achieves more efficient roller 1 temperature regulation.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A structure of a calendering roll characterized by comprising: The roller body (1) includes a roller body (1), and the roller pressing area of ​​the roller body (1) includes a first annular region (11) and a second annular region (12), and the first annular region (11) and the second annular region (12) are arranged sequentially along the axial direction of the roller body (1). The roller body (1) has flow channels (14) around its sidewalls. The flow channels (14) include at least a first flow channel (143) located in the first annular region (11). The first flow channel (143) is used to introduce fluid to regulate the temperature of the first annular region (11).

2. The calendering roller structure according to claim 1, characterized in that: The flow channel (14) further includes a second flow channel (144) disposed in the second annular region (12), the second flow channel (144) being used to introduce fluid to regulate the temperature of the second annular region (12).

3. The calendering roller structure according to claim 2, characterized in that: The roller body (1) also includes a third annular region (13) in the rolling zone. The third annular region (13) is located on the side of the second annular region (12) away from the first annular region (11). The flow channel (14) also includes a third flow channel (145) located in the third annular region (13). The third flow channel (145) is used to introduce fluid to regulate the temperature of the third annular region (13).

4. The calendering roller structure according to claim 3, characterized in that: It also includes multiple inlet channels (15), the first end of which is connected to the upstream of the first flow channel (143), the second flow channel (144) and the third flow channel (145).

5. The calendering roller structure according to claim 1, characterized in that: The flow channel (14) includes multiple first unit channels (141) extending axially along the roller body (1) and multiple second unit channels (142) extending circumferentially along the roller body (1). The multiple first unit channels (141) are arranged at intervals along the circumferential direction of the roller body (1), and the multiple first unit channels (141) and the multiple second unit channels (142) are alternately connected.

6. The calendering roller structure according to claim 4, characterized in that: The roller body (1) also includes connecting parts (17) located at both ends, the connecting parts (17) being used to connect with external mechanisms; The second ends of the plurality of inlet channels (15) extend to the side wall of the same connecting part (17), and the second ends of the plurality of inlet channels (15) are arranged sequentially along the axial direction of the roller body (1).

7. The calendering roller structure according to claim 6, characterized in that: The sidewall of the connecting part (17) is provided with multiple guide grooves (171) along the axial direction of the roller body (1). The multiple guide grooves (171) are connected to the second end of the multiple inlet channels (15) respectively. The guide grooves (171) are used to communicate with the external mechanism and to introduce fluid into the flow channel (14).

8. The calendering roller structure according to claim 7, characterized in that: A sleeve (3) is provided outside the connecting part (17). The sleeve (3) is arranged around and rotated on the periphery of the connecting part (17). Multiple flow guides (31) are provided on the sleeve (3). The multiple flow guides (31) are connected to the multiple flow guides (171) one by one.

9. A pressure roller mechanism, characterized in that: Including the pressure roller structure and control device (4) as described in any one of claims 1-8, the control device (4) comprising: A servo proportional valve (41) is provided, the output port of which is connected to the first flow channel (143). Temperature sensor (42) is used to measure the temperature of the first annular region (11) and the second annular region (12); The controller is electrically connected to the servo proportional valve (41) and the temperature sensor (42) and is used to determine the temperature difference between the first annular region (11) and the second annular region (12) based on the temperature of the first annular region (11) and the second annular region (12), and to control the opening degree of the servo proportional valve (41) based on the temperature difference.

10. A pressure roller mechanism according to claim 9, characterized in that: The control device (4) further includes a reversing valve (43), the output port of the reversing valve (43) is connected to the input port of the servo proportional valve (41), and the reversing valve (43) includes a first input port and a second input port. The first input port is used to introduce fluid at a first temperature, and the second input port is used to introduce fluid at a second temperature. The first temperature is higher than the second temperature. The controller is also electrically connected to the reversing valve (43) for introducing fluid of the second temperature into the servo proportional valve (41) when the temperature difference is less than the limit value; and introducing fluid of the first temperature into the servo proportional valve (41) when the temperature is greater than or equal to the limit value.

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