Transmission device for bottom roller of calender

Abstract

The utility model provides a transmission device for a bottom roller of a calender, and belongs to the technical field of calenders. The transmission device comprises a transmission side rack and a transmission shaft, and the transmission shaft movably penetrates through the transmission side rack; assembling units used for fixing the transmission shaft are arranged at the two ends of the transmission side rack correspondingly, and the end of the transmission shaft penetrates through the assembling units and extends to the outer side of the transmission side rack; the assembly unit comprises a detachable packaging mechanism, the packaging mechanism is arranged at the end of the transmission side rack, a bearing arranged at the end of the transmission shaft in a sleeving mode is arranged in the packaging mechanism, and the transmission shaft is in assembly connection with the transmission side rack through the packaging mechanism and the bearing. Through the design of the split type detachable bearing chamber, the maintenance cost is reduced, the maintenance downtime is shortened, the service life of the bearing is prolonged, the replacement frequency of the synchronous belt is reduced, and the economical efficiency of a paper-making calendaring section and the equipment reliability are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of calendering machine technology, and in particular to a transmission device for the bottom roller of a calendering machine. Background Technology

[0002] In the calendering section of the pulp and paper industry, the calender is a crucial piece of equipment. It is primarily used to calender the paper web by passing it through one or more pressure zones between two sets of rollers, altering the surface and internal properties of the paper and thus improving its quality. Calendered paper exhibits increased density, more uniform thickness, improved printability, and reduced air permeability. Simultaneously, the calender's process parameters, such as the number of pressure zones, linear pressure, and roller temperature, significantly influence the paper's smoothness, gloss, and strength.

[0003] In the transmission system of a calender, the calender bottom roller is typically driven by a drive motor connected to one end of a drive shaft via a universal coupling. The other end of the drive shaft is fitted with a synchronous pulley, which drives the calender bottom roller to rotate via a synchronous belt. The bearing positions at both ends of the drive shaft are connected to the bridge bearing housing of the transmission side frame through bearing fit.

[0004] Currently, most bridge bearing housings and drive-side frames are typically constructed as a single welded structure. While this structure is relatively simple and serves both connection and transmission functions, it still has the following shortcomings in practical use: From a structural design perspective, in existing transmission structures, the drive shaft is fitted with two identical rolling bearings at the bearing location into the integrated bearing housing frame, and is then connected and sealed to the bearing housing end caps on both sides by connecting bolts. This integrated design makes the bearing housing and frame an inseparable whole. During the operation of the calender, because the transmission equipment drives the end of the calender's bottom roller using a synchronous belt drive, the synchronous belt pulley is subjected to radial tension from the tensioner. During the rotation of the synchronous belt pulley, this tension causes the bearing to vibrate, resulting in wear on one side of the bridge bearing housing. After the bearing location wears down, the vibration intensifies further, causing the synchronous belt to frequently deviate, requiring frequent replacement of the synchronous belt. This not only increases the risk of downtime but also causes significant economic losses. Even more seriously, once the bridge bearing housing wears out, because the bearing housing and the frame are an integral structure, the worn bearing housing cannot be repaired or replaced separately; the entire frame must be purchased and replaced. This not only results in huge costs for spare parts, but also requires the entire frame to be disassembled and reassembled during replacement, leading to extended downtime and severely impacting production efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, which has the bearing chamber and transmission side frame as an integrated structure, making maintenance and replacement difficult and affecting production efficiency, and to provide a transmission device for the bottom roller of a calender.

[0006] This utility model is achieved through the following technical solution: a transmission device for the bottom roller of a calender, comprising a transmission side frame and a transmission shaft, the transmission shaft being movably inserted through the transmission side frame; assembly units for fixing the transmission shaft are respectively provided at both ends of the transmission side frame, the end of the transmission shaft passing through the assembly unit and extending to the outside of the transmission side frame; the assembly unit includes a detachable packaging mechanism, the packaging mechanism being provided at the end of the transmission side frame, the packaging mechanism having a bearing sleeved on the end of the transmission shaft inside, the transmission shaft being assembled and connected to the transmission side frame through the packaging mechanism and the bearing.

[0007] Referring to the existing transmission structure of the bottom roller of the calender, one end of the transmission shaft is connected to the transmission motor through a universal coupling, and the other end of the transmission shaft is equipped with a synchronous pulley, which drives the bottom roller of the calender to rotate through a synchronous belt.

[0008] The transmission side frame of this invention features detachable encapsulation mechanisms at both ends, through which the transmission shaft is assembled with the bearing. This structural design solves the problem of traditional integrated structures where the bearing housing cannot be replaced separately, effectively reducing spare parts costs, shortening maintenance time, and improving production efficiency.

[0009] A further improvement of this utility model is that the packaging mechanism includes a bearing chamber for assembling the bearing, one end of the bearing chamber is fixedly connected to a flange A, and the other end of the bearing chamber is detachably connected to an end cover; the end of the transmission side frame is fixedly connected to a flange B that matches flange A, and flange A and flange B are detachably connected so that the bearing chamber and the transmission side frame can form a detachable connection structure.

[0010] The bearing housing described in this invention is detachably connected via flanges A and B, and the end cover is also detachable. This design enables quick assembly and disassembly of the bearing housing and the frame, avoiding the need for complete frame replacement and reducing downtime. Simultaneously, the flange connection ensures structural stability and prevents coaxiality deviations caused by deformation resulting from direct welding between the bearing housing and the transmission-side frame.

[0011] A further improvement of this utility model is that the inner diameter of the bearing chamber is larger than the inner diameter of the flange A, so that a stepped structure can be formed at the connection between the inner cavity of the bearing chamber and the inner cavity of the flange A.

[0012] The bearing chamber diameter of this invention is larger than the inner diameter of flange A, forming a stepped structure. This stepped structure provides axial positioning for the bearing, preventing bearing displacement and thus enhancing transmission stability. This, in turn, reduces synchronous belt misalignment caused by bearing vibration, effectively extending the service life of the synchronous belt.

[0013] A further improvement of this utility model is that a stop is provided at one end of the bearing housing near the transmission side frame, and the stop is inserted into the interior of the corresponding side of the transmission side frame.

[0014] The bearing housing of this invention features a stop on its inner side, which can be inserted into the inner side of the transmission-side frame. This stop ensures the coaxiality of the bearing housing and the frame, thereby reducing assembly errors and minimizing abnormal bearing wear and vibration caused by coaxiality deviations.

[0015] A further improvement of this utility model is that the end cover and the bearing chamber, as well as flange A and flange B, are detachably connected by bolts.

[0016] The end cap, bearing housing, and flanges A and B described in this invention are all connected by bolts. This bolt connection method facilitates quick disassembly and replacement of the bearing housing, effectively improving maintenance efficiency. Furthermore, the standardized bolt interfaces are compatible with universal tools, further reducing maintenance difficulty.

[0017] Further improvements to this invention include welding of the bearing housing to flange A and the transmission side frame to flange B.

[0018] The bearing housing and flange A, and the frame and flange B, as described in this invention, are welded together. Welding enhances structural rigidity, avoids the risk of bolt loosening, and thus extends the service life of the equipment.

[0019] A further improvement of this utility model is that the bearing is a rolling bearing, and the end of the transmission shaft is provided with a bearing seat that mates with the inner ring of the bearing.

[0020] The rolling bearing described in this invention is fitted with a bearing seat on a transmission shaft. The rolling bearing has a low coefficient of friction and high transmission efficiency, and its standardized bearing seat design is compatible with common bearing models, further reducing spare parts procurement costs.

[0021] A further improvement of this invention is that the inner surface of the bearing seat is provided with a wear-resistant coating.

[0022] The bearing seat inner surface of this invention is provided with a wear-resistant coating.

[0023] The wear-resistant coating (such as a polymer composite material) can effectively extend the service life of the bearing seat, reduce the repair frequency, and thus reduce the vibration amplitude caused by bearing seat wear.

[0024] As can be seen from the above technical solutions, the beneficial effects of this utility model are:

[0025] 1. This utility model, through the detachable design of the bearing housing and the transmission side frame, only requires the replacement of the detachable bearing housing, without the need to replace the entire frame, effectively extending the replacement frequency of the synchronous belt, reducing material consumption, and thus significantly reducing maintenance costs.

[0026] 2. This utility model, through the detachable design of the bearing housing and the transmission side frame, greatly shortens the downtime for single maintenance, thereby reducing unplanned downtime caused by equipment failure, ensuring continuous production, and effectively improving production efficiency.

[0027] 3. Through the specific design of the bearing chamber, this utility model extends the service life of the bearing, and the wear-resistant coating and coaxiality design of the stop reduce wear, thereby reducing the synchronous belt deviation rate and vibration amplitude, significantly improving operational stability, not only enhancing equipment reliability, but also extending the service life of the equipment.

[0028] 4. This utility model adopts a standardized flange interface to support quick disassembly and assembly, is compatible with universal bearings and tools, significantly improves maintenance efficiency, and the modular design realizes "replacement as needed", making maintenance difficult and with high convenience and adaptability. Attached Figure Description

[0029] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0031] Figure 2 This is a cross-sectional view of the transmission side frame and assembly unit of a specific embodiment of this utility model.

[0032] In the diagram: 1. Transmission side frame; 2. Transmission shaft; 3. Assembly unit; 4. Bearing housing; 5. Flange A; 6. Flange B; 7. End cover; 8. Bolt; 9. Stop; 10. Bearing; 11. Bearing position. Detailed Implementation

[0033] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0034] Please refer to the attached document. Figure 1 The following is a description of a specific embodiment: The transmission device for the bottom roller of a calender according to the present invention includes a transmission side frame 1 and a transmission shaft 2, the transmission shaft 2 being movably inserted through the transmission side frame 1; assembly units 3 for fixing the transmission shaft are respectively provided at both ends of the transmission side frame 1, the end of the transmission shaft 2 passing through the assembly unit 3 and extending to the outside of the transmission side frame 1; the assembly unit 3 includes a detachable packaging mechanism, the packaging mechanism being provided at the end of the transmission side frame 1, and a bearing 10 sleeved on the end of the transmission shaft 2 being provided inside the packaging mechanism; the transmission shaft 2 is assembled and connected to the transmission side frame 1 through the packaging mechanism and the bearing 10.

[0035] Referring to the existing transmission structure of the bottom roller of the calender, one end of the transmission shaft 2 is connected to the transmission motor through a universal coupling, and the other end of the transmission shaft 2 is equipped with a synchronous pulley, which drives the bottom roller of the calender to rotate through the synchronous belt.

[0036] The drive shaft 2 of this transmission device movably passes through the transmission-side frame 1 via assembly units 3 at both ends. The bearing 10 is sleeved on the end of the drive shaft 2 and fixed in the encapsulation mechanism, realizing the rotational support and power transmission of the drive shaft 2. This design separates the bearing chamber 4 from the frame. When the bearing seat 11 wears, only the encapsulation mechanism needs to be replaced, avoiding the disassembly and assembly of the entire frame, shortening maintenance downtime, and improving production efficiency.

[0037] For details, please refer to the appendix. Figure 2 The encapsulation mechanism includes a bearing chamber 4 for assembling the bearing 10. One end of the bearing chamber 4 is fixedly connected to a flange A5, and the other end of the bearing chamber 4 is detachably connected to an end cover 7. The end of the transmission side frame 1 is fixedly connected to a flange B6 that matches the flange A5. The flange A5 and the flange B6 are detachably connected so that the bearing chamber 4 and the transmission side frame 1 can form a detachable connection structure.

[0038] For details, please refer to the appendix. Figure 2 The end cover 7 and bearing housing 4, as well as flange A5 and flange B6, are detachably connected by bolts 8. The bearing housing 4 and flange A5, and the transmission side frame 1 and flange B6 are welded together.

[0039] The bearing housing 4 of this transmission device is bolted to the flange B6 of the transmission side frame 1 via flange A5, and the end cover 7 seals the other end of the bearing housing 4 via bolts 8. When the bearing 10 or the bearing housing 4 is worn, the bolts 8 can be quickly removed to replace the component. This standardized flange interface supports modular replacement, effectively improving maintenance efficiency; at the same time, due to the enhanced bearing stability, the synchronous belt misalignment rate is reduced.

[0040] In one embodiment, reference is made to the appendix. Figure 2The inner diameter of the bearing chamber 4 is larger than the inner diameter of the flange A5, so that a stepped structure can be formed at the connection between the inner cavity of the bearing chamber 4 and the inner cavity of the flange A5. A stop 9 is provided at one end of the bearing chamber 4 near the transmission side frame 1, and the stop 9 is inserted into the interior of the corresponding side of the transmission side frame 1.

[0041] The bearing chamber 4 of this transmission device has an inner diameter larger than the inner diameter of the flange A5, forming a stepped structure. The outer ring of the bearing 10 abuts against the step to achieve axial positioning. Furthermore, the inner side stop 9 of the bearing chamber 4 inserts into the inner side of the transmission side frame 1, reducing coaxiality error. This stepped structure reduces the risk of bearing 10 displacement, and the stop 9 design reduces vibration amplitude, thereby significantly extending the service life of the bearing 10.

[0042] In one embodiment, reference is made to the appendix. Figure 2 The bearing 10 is a rolling bearing, and the end of the transmission shaft 2 is provided with a bearing seat 11 that mates with the inner ring of the bearing 10. The inner surface of the bearing seat 11 is provided with a wear-resistant coating.

[0043] The bearing housing 4 of this transmission device is welded and fixed to flange A5, and the transmission side frame 1 is welded and fixed to flange B6 to enhance structural rigidity; the inner surface of the bearing seat 11 of the transmission shaft 2 is coated with a wear-resistant coating such as a polymer composite material. Welding avoids the risk of bolt loosening, and the wear-resistant coating can extend the service life of the bearing seat 11 and reduce the frequency of maintenance due to wear.

[0044] Meanwhile, the inner ring of the rolling bearing in this transmission device is interference-fitted with the bearing seat 11 of the transmission shaft 2, and the outer ring is fixed to the bearing chamber 4; the end of the transmission shaft 2 is connected to the bottom roller of the calender through a synchronous belt pulley, and the tension of the synchronous belt is adjusted by the tensioning wheel of the calender. The rolling bearing has a low coefficient of friction and high transmission efficiency, which can effectively reduce the frequency of synchronous belt replacement.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmission device for a calender bottom roll, comprising a transmission side frame (1) and a transmission shaft (2) which is movably penetrated through the transmission side frame (1), characterized in that The transmission side frame (1) is provided with an assembly unit (3) for fixing the transmission shaft at both ends, the end of the transmission shaft (2) passes through the assembly unit (3) and extends to the outside of the transmission side frame (1); the assembly unit (3) comprises a detachable packaging mechanism, the packaging mechanism is arranged at the end of the transmission side frame (1), the inside of the packaging mechanism is provided with a bearing (10) sleeved on the end of the transmission shaft (2), and the transmission shaft (2) is assembled and connected with the transmission side frame (1) through the packaging mechanism and the bearing (10).

2. A drive device for a bottom roll of a calender according to claim 1, characterized in that The packaging mechanism comprises a bearing chamber (4) for assembling the bearing (10), one end of the bearing chamber (4) is fixedly connected with a flange A (5), and the other end of the bearing chamber (4) is detachably connected with an end cover (7); the end of the transmission side frame (1) is fixedly connected with a flange B (6) matched with the flange A (5), and the flange A (5) and the flange B (6) are detachably connected, so that the bearing chamber (4) and the transmission side frame (1) can form a detachable connection structure.

3. A drive for a calender bottom roll according to claim 1 or 2, characterized in that The inner diameter of the bearing chamber (4) is greater than the inner diameter of the flange A (5), so that the connection between the inner cavity of the bearing chamber (4) and the inner cavity of the flange A (5) can form a step structure.

4. A drive device for a bottom roll of a calender according to claim 3, characterized in that The end of the bearing chamber (4) close to the transmission side frame (1) is provided with a stop opening (9), and the stop opening (9) is inserted into the inside of the corresponding side of the transmission side frame (1).

5. A drive for a calender bottom roll according to claim 4, characterized in that The end cover (7) and the bearing chamber (4), and the flange A (5) and the flange B (6) are detachably connected through bolts (8).

6. A drive for a calender bottom roll according to claim 5, characterized in that The bearing chamber (4) and the flange A (5), and the transmission side frame (1) and the flange B (6) are welded.

7. A drive for a calender bottom roll according to claim 6, characterized in that The bearing (10) is a rolling bearing, and the end of the transmission shaft (2) is provided with a bearing position (11) matched with the inner ring of the bearing (10).

8. A drive for a bottom roll of a calender according to claim 7, characterized in that The inner surface of the bearing position (11) is provided with a wear-resistant coating.

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