Roller device and belt conveyor

Abstract

The utility model relates to the technical field of conveying equipment, and discloses a roller device and a belt conveyor, comprising: a bearing unit comprising a bearing main body, a transmission assembly and a driving assembly; a cooling channel for cooling liquid to circulate is arranged in at least one part of wall surface, surrounding the transmission assembly, of the bearing main body, so that a cooling surface is formed on the outer wall of the bearing main body; the working space is provided with an oil inlet and an oil outlet which are communicated with the outside; the roller unit comprises a roller assembly which is arranged outside the bearing unit in a sleeving manner and is filled with lubricating oil; the roller assembly is in transmission fit with the transmission assembly, and a scraping structure is arranged on the inner wall of the roller assembly. According to the roller device, through the mode that the two cooling loops are combined, cooling liquid can cool the whole exterior of the bearing main body, meanwhile, parts in the bearing main body can be indirectly cooled through lubricating oil, the cooling efficiency and the heat dissipation uniformity of the roller device are improved, and the service life of the roller device is prolonged. And the phenomenon that the local temperature in the roller device is too high can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying equipment, in particular to a roller device and a belt conveyor. Background Art

[0002] With the continuous increase in the demand for transportation volume and the requirements for energy conservation and environmental protection of belt conveyors, in order to increase the speed of permanent magnet motors, reduce their volume, and improve their power density, in high-power working conditions, the drive device for driving the belt roller in a belt conveyor is gradually changing from the drive form of an asynchronous motor combined with an external gearbox to the drive form of a permanent magnet motor combined with a planetary reducer. Since the heat generated during the operation of the improved roller drive device also increases, in order to ensure the safety of the roller drive process, a heat dissipation structure needs to be provided in the roller drive.

[0003] Currently, the existing roller drive devices mainly use oil cooling or water cooling methods for heat dissipation. By providing a single cooling cavity inside the roller drive device, and allowing cooling water or cooling oil to circulate in the cooling cavity to reduce the temperature of the roller drive device. Although this cooling method has a relatively simple structure, its heat dissipation capacity is limited during actual operation. Under the continuous operation of the belt conveyor, the temperature of the roller drive device still tends to be too high. Therefore, the existing cooling methods for roller drive devices have the problem of poor cooling effect. Summary of the Utility Model

[0004] In view of this, the utility model provides a roller device and a belt conveyor to solve the problem of poor cooling effect of the existing cooling methods for roller drive devices.

[0005] In a first aspect, the utility model provides a roller device, including: a bearing unit, including a bearing body, a transmission assembly, and a drive assembly; a cooling channel for the circulation of a coolant is provided inside at least a part of the wall surface of the bearing body surrounding the transmission assembly to form a cooling surface on its outer wall; the working space has an oil inlet and an oil outlet communicating with the outside; the drive assembly is used to drive the transmission assembly to rotate relative to the bearing body; a roller unit, including a roller assembly sleeved outside the bearing unit and filled with lubricating oil; the roller assembly is in transmission cooperation with the transmission assembly, and a scraping structure is provided on its inner wall; the scraping structure is used to bring the lubricating oil to the cooling surface for cooling, so that part of the cooled lubricating oil flows through the transmission assembly and the drive assembly in the working space from the oil inlet and then flows back to the roller assembly along the oil outlet.

[0006] Beneficial effects: The cooling channels form a first cooling circuit, and the inner cavity of the drum assembly, the oil inlet, the working space, and the oil outlet form a second cooling circuit for the lubricating oil to flow through. The coolant in the first cooling circuit can conduct heat exchange with the entire load-bearing body surrounding the working space, not only reducing the temperature of the load-bearing body but also forming a cooling surface on the outer wall of the load-bearing body. When the drum device is working, the drum assembly rotates and uses the scraping structure to bring the lubricating oil in the accommodating space to the surface of the load-bearing body. Part of the lubricating oil enters the working space through the oil inlet, fully conducts heat exchange with the components therein, and then flows back to the accommodating space through the oil outlet. Another part of the lubricating oil indirectly conducts heat exchange with the coolant at the cooling surface. By combining the two cooling circuits, the coolant can not only cool the entire exterior of the load-bearing body but also indirectly cool the components inside the load-bearing body through the lubricating oil, greatly improving the cooling efficiency and heat dissipation uniformity of the drum device, effectively avoiding the phenomenon of local overheating inside the drum device, and effectively solving the problem of poor cooling effect of the existing cooling method for drum drive devices.

[0007] In an optional implementation manner, the load-bearing unit further includes a liquid collecting structure disposed around the oil inlet.

[0008] Beneficial effects: The liquid collecting structure can more efficiently guide the lubricating oil into the oil inlet, improving the reliability and stability of the lubricating oil entering the working space and enhancing the heat exchange efficiency of the lubricating oil.

[0009] In an optional implementation manner, the oil inlet is located at the top of the load-bearing body, the liquid collecting structure is funnel-shaped and has a collecting port at the bottom, and the collecting port is communicated with the oil inlet, and / or the coolant is cooling water.

[0010] Beneficial effects: The form of the liquid collecting structure is simple and reliable, facilitating processing and manufacturing.

[0011] In an optional implementation manner, the load-bearing unit further includes heat dissipation fins disposed on the outer wall of the load-bearing body.

[0012] Beneficial effects: The heat dissipation fins can not only increase the heat exchange area of the outer wall of the load-bearing body but also enable the lubricating oil to flow on the heat dissipation fins for a longer time, thereby more fully indirectly exchanging heat with the coolant.

[0013] In an optional implementation manner, the load-bearing body includes a left support shaft, a cooling housing, and a right support shaft that are sequentially assembled and connected to enclose a working space. The cooling channels are located inside the cooling housing and are spirally arranged along the circumference of the cooling housing. The drum assembly is respectively assembled and connected to the left support shaft and the right support shaft.

[0014] Beneficial effects: The load-bearing body has a stable and reliable structure, is easy to disassemble and assemble, and the spirally arranged cooling channels can more fully cool the cooling housing.

[0015] In an alternative embodiment, the cooling channels are arranged in a double helix, and / or the corners of the cooling channels are rounded.

[0016] Beneficial effects: The cooling channels in this form are longer, enabling the coolant therein to perform heat exchange more fully, improving the heat dissipation efficiency. The rounded corners can reduce the impact of the coolant on the cooling channels at the bends, preventing local positions inside the cooling housing from being damaged by the long-term impact of the coolant, and also reducing the overall vibration of the cooling housing during operation.

[0017] In an alternative embodiment, the outer wall of the cooling housing is provided with a liquid inlet and a liquid outlet communicating with the cooling channels. The load-bearing body further includes a liquid inlet pipe and a liquid outlet pipe. Inside the right support shaft, there are a liquid inlet channel and a liquid outlet channel for the coolant to flow through. Input ports and output ports are formed on the end face of the right support shaft corresponding to the liquid inlet channel and the liquid outlet channel. The liquid inlet is connected to the liquid inlet channel through the liquid inlet pipe, and the liquid outlet is communicated with the liquid outlet channel through the liquid outlet pipe.

[0018] Beneficial effects: The liquid inlet pipe and the liquid outlet pipe can effectively avoid opening connection holes on the cross-section where the cooling housing and the right support shaft are fitted, greatly improving the sealing performance of the first cooling circuit and being easy to disassemble, install and maintain.

[0019] In an alternative embodiment, the cooling housing includes an inner housing and an outer housing. The outer housing is sleeved on the outside of the inner housing. The inner housing and the outer housing enclose to form the cooling channels, and / or the drive assembly is a planetary reduction motor.

[0020] Beneficial effects: The cooling housing in this form has a simple structure. The cooling channels are formed by enclosing the inner housing and the outer housing, which is more convenient for machining and manufacturing of local structures. The drive assembly in this form can provide a greater driving torque.

[0021] In an alternative embodiment, the drive assembly is sequentially fitted with the inner wall of the cooling housing through a bearing and a connecting flange, and the gap of the bearing forms an oil outlet.

[0022] Beneficial effects: There is no need to separately open an outlet. When the lubricating oil level inside the cooling housing exceeds the position from the connecting flange to the contact with the bearing, it can directly flow into the accommodation space through the gap in the bearing.

[0023] In a second aspect, the present invention further provides a belt conveyor, which includes: at least one of the above-mentioned drum devices; a conveyor belt, which is in driving cooperation with the outer wall of the drum device. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a cross-sectional view of a drum device according to an embodiment of the present invention;

[0026] Figure 2 It is Figure 1 a three-dimensional schematic diagram after the assembly of the bearing body and the transmission component of the drum device shown;

[0027] Figure 3 It is Figure 2 an enlarged schematic diagram at position A in

[0028] Figure 4 It is Figure 1 a cross-sectional view of the cooling housing of the drum device shown;

[0029] Figure 5 It is Figure 4 a three-dimensional schematic diagram of the inner housing of the cooling housing shown;

[0030] Figure 6 It is Figure 4 a three-dimensional schematic diagram of the outer housing of the cooling housing shown;

[0031] Figure 7 It is Figure 2 a three-dimensional schematic diagram of the right support shaft of the bearing body shown;

[0032] Figure 8 It is Figure 7 a cross-sectional view of the right support shaft shown.

[0033] Explanation of reference numerals:

[0034] 1. Bearing body; 101. Working space; 102. Left support shaft; 1021. Left support flange; 1022. Left connecting bearing;

[0035] 103. Cooling housing; 1031. Cooling channel; 10311. Fillet; 1032. Liquid inlet; 1033. Liquid outlet; 1034. Oil inlet; 1035. Inner housing; 10351. First housing section; 10352. Second housing section; 1036. Outer housing;

[0036] 104. Right support shaft; 1041. Liquid inlet channel; 1042. Input port; 1043. Output port; 1044. First connection port; 1045. Second connection port; 1046. Right support flange; 1047. Right connection bearing; 105. Liquid inlet pipe; 106. Liquid outlet pipe;

[0037] 2. Transmission assembly; 3. Drum assembly; 301. Accommodating space; 4. Scraping structure; 5. Planetary reduction motor; 501. Stator; 502. Reduction gearbox; 6. Liquid collection structure; 601. Collection port; 602. Fastening component; 7. Heat dissipation fins; 8. Bearing; 9. Connection flange. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] The following will be combined with Figures 1 to 8 to describe the embodiments of the present utility model.

[0040] According to an embodiment of the present utility model, on the one hand, a drum device is provided, including: a bearing unit and a drum unit. The bearing unit includes a bearing main body 1, a transmission assembly 2 and a driving assembly; a working space 101 for installing the transmission assembly 2 and the driving assembly is provided inside the bearing main body 1, and a cooling channel 1031 for the coolant to flow through is provided inside at least a part of the wall surface around the transmission assembly 2 to form a cooling surface on its outer wall; the working space 101 has an oil inlet 1034 and an oil outlet communicating with the outside; the driving assembly is used to drive the transmission assembly 2 to rotate relative to the bearing main body 1; the drum unit includes a drum assembly 3 sleeved outside the bearing unit and filled with lubricating oil; the drum assembly 3 is in transmission cooperation with the transmission assembly 2, and a scraping structure 4 is provided on its inner wall; the scraping structure 4 is used to bring the lubricating oil to the cooling surface for cooling, so that part of the cooled lubricating oil flows through the transmission assembly 2 and the driving assembly in the working space 101 from the oil inlet 1034 and then flows back to the drum assembly 3 along the oil outlet.

[0041] Applying the drum device of this embodiment, the cooling channel 1031 forms a first cooling circuit, the inner cavity of the drum assembly 3, the oil inlet 1034, the working space 101, and the oil outlet form a second cooling circuit for the lubricating oil to flow through. The coolant in the first cooling circuit can conduct heat exchange with the entire bearing body 1 surrounding the working space 101, not only reducing the temperature of the bearing body 1 but also forming a cooling surface on the outer wall of the bearing body 1. When the drum device operates, the drum assembly 3 rotates and uses the scraping structure 4 to bring the lubricating oil in the accommodation space 301 to the surface of the bearing body 1. After a part of the lubricating oil enters the working space 101 through the oil inlet 1034 and fully conducts heat exchange with the components therein, it flows back to the accommodation space 301 through the oil outlet. Another part of the lubricating oil indirectly conducts heat exchange with the coolant at the cooling surface. By combining the two cooling circuits, the coolant can not only cool the entire exterior of the bearing body 1 but also indirectly cool the components inside the bearing body 1 through the lubricating oil, greatly improving the cooling efficiency and heat dissipation uniformity of the drum device, effectively avoiding the phenomenon of local overheating inside the drum device, and effectively solving the problem of poor cooling effect of the existing cooling method for drum drive devices.

[0042] It should be noted that an accommodation space 301 is formed between the inner wall of the drum assembly 3 and the outer wall of the bearing unit, and the lubricating oil is stored in the accommodation space 301. After the lubricating oil enters the working space 101, it can not only conduct heat exchange to take away heat but also play a lubricating role for the components in the working space 101.

[0043] Among them, there is no limitation on the specific form and quantity of the scraping structure 4. The scraping structure 4 can be a scraping plate provided on the inner wall of the drum assembly 3, or a scraping groove formed by a depression on the inner wall of the drum assembly 3. The scraping structure 4 can be one or multiple arranged at intervals along the axial direction of the inner wall of the drum assembly 3, as long as it can meet the requirement of driving the lubricating oil, and it can be flexibly selected.

[0044] Specifically, the drive assembly includes a drive motor assembly and a speed reduction assembly. There is no limitation on the specific form of the drive motor and the speed reduction assembly. The drive motor can be an asynchronous motor, a permanent magnet motor, etc., and the speed reduction assembly can be a planetary speed reducer or a reduction gearbox, etc., which can be flexibly selected according to requirements.

[0045] Preferably, the drive assembly is a planetary reduction motor, and the transmission assembly 2 is a planetary gear disc assembly.

[0046] In a possible implementation manner, the bearing unit further includes a liquid collecting structure 6 disposed around the oil inlet 1034. The liquid collecting structure 6 can more efficiently guide the lubricating oil into the oil inlet 1034, improve the reliability and stability of the lubricating oil entering the working space 101, and improve the heat exchange efficiency of the lubricating oil.

[0047] Among them, to facilitate the lubricating oil to enter the oil inlet 1034, the oil inlet 1034 is arranged on the upper side of the bearing body 1, which can be the top of the bearing body 1 or a position near the top of the bearing body 1. The liquid collecting structure 6 can be a baffle or a funnel surrounding the oil inlet 1034, or a strip-shaped groove or a funnel-shaped groove formed around the oil inlet 1034 at the top of the bearing body 1, and can be flexibly selected according to requirements.

[0048] In a possible implementation manner, the oil inlet 1034 is located at the top of the bearing body 1, and the liquid collecting structure 6 is in a funnel shape and has a bottom collecting port 601. The collecting port 601 is communicated with the oil inlet 1034. The form of the liquid collecting structure 6 is simple and reliable, which is convenient for processing and manufacturing.

[0049] Among them, it should be noted that the top refers to Figure 1 the side in the "up" direction indicated by the arrow in Figure 1 and the bottom refers to

[0050] Specifically, as Figure 3 and Figure 5 shown, to facilitate the installation of the liquid collecting structure 6, a flat installation surface is formed around the oil inlet 1034 on the bearing body 1. At least one connection hole for cooperating with the fastening member 602 is arranged on the installation surface. The liquid collecting structure 6 includes a bottom plate and a baffle surrounding the edge of the bottom plate. The collecting port 601 is located on the bottom plate and is arranged corresponding to the oil inlet 1034. The baffle is inclined to guide the lubricating oil to flow into the collecting port 601. A cooperation hole for the fastening member 602 to pass through is arranged at the position of the bottom plate corresponding to the connection hole. The liquid collecting structure 6 is assembled and connected to the installation surface through the fastening member 602.

[0051] In a possible implementation manner, the coolant is cooling water. This form of coolant has a fast flow rate, low viscosity and a relatively high specific heat capacity, and can flow quickly and absorb a large amount of heat.

[0052] Among them, it should be noted that the specific components of the cooling water and the cooling oil are not strictly limited and can be flexibly selected according to requirements.

[0053] In a possible implementation manner, the bearing unit further includes heat dissipation fins 7 arranged on the outer wall of the bearing body 1. The heat dissipation fins 7 can not only increase the heat exchange area of the outer wall of the bearing body 1, but also enable the lubricating oil to flow on the heat dissipation fins 7 for a longer time, and thus indirectly exchange heat with the coolant more fully.

[0054] Specifically, the number of the heat dissipation fins 7 is multiple, and they are arranged at intervals along the axial direction of the bearing body 1. Each heat dissipation fin 7 is arranged perpendicular to the axis of the bearing body 1.

[0055] In a possible implementation, the carrier body 1 includes a left support shaft 102, a cooling housing 103, and a right support shaft 104 that are sequentially assembled and connected to enclose a working space 101. The cooling channel 1031 is located inside the cooling housing 103 and is spirally arranged along the circumference of the cooling housing 103. The drum assembly 3 is respectively assembled and connected to the left support shaft 102 and the right support shaft 104. The carrier body 1 has a stable and reliable structure, is convenient for disassembly and assembly, and the spirally arranged cooling channel 1031 can cool the cooling housing 103 more sufficiently.

[0056] The carrier body 1 further includes a left support flange 1021, a left connecting bearing 1022, a right support flange 1046, and a right connecting bearing 1047. For the right support shaft 104, the left support flange 1021 is rotatably assembled to the left support shaft 102 through the left connecting bearing 1022, and the right support flange 1046 is rotatably assembled to the right support shaft 104 through the right connecting bearing 1047. One end of the drum assembly 3 is assembled and connected to the left support flange 1021, and the other end is assembled and connected to the right support flange 1046.

[0057] In a possible implementation, the cooling channel 1031 is arranged in a double helix. This form of the cooling channel 1031 has a longer length, can enable the coolant therein to perform heat exchange more sufficiently, and improve the heat dissipation efficiency.

[0058] In a possible implementation, the turning points of the cooling channel 1031 are arranged as rounded corners 10311 to reduce the impact of the coolant on the cooling channel 1031 at the turning points, avoid damage to local positions inside the cooling housing 103 caused by long-term impact of the coolant, and at the same time can also reduce the overall vibration of the cooling housing 103 during operation.

[0059] In a possible implementation, as Figure 2 、 Figure 6 and Figure 7 shown, the outer wall of the cooling housing 103 is provided with a liquid inlet 1032 and a liquid outlet 1033 that communicate with the cooling channel 1031. The carrier body 1 further includes a liquid inlet pipe 105 and a liquid outlet pipe 106. Inside the right support shaft 104, there are a liquid inlet channel 1041 and a liquid outlet channel for the coolant to flow through. Input ports 1042 and output ports 1043 are formed on the end face of the right support shaft 104 corresponding to the liquid inlet channel 1041 and the liquid outlet channel. The liquid inlet 1032 is connected to the liquid inlet channel 1041 through the liquid inlet pipe 105, and the liquid outlet 1033 is communicated with the liquid outlet channel through the liquid outlet pipe 106. The liquid inlet pipe 105 and the liquid outlet pipe 106 can effectively avoid opening connection holes on the cross-section where the cooling housing 103 and the right support shaft 104 are fitted, greatly improving the sealing performance of the first cooling circuit and being easy to disassemble, assemble and maintain.

[0060] Specifically, as Figure 7As shown, for the convenience of connecting with the corresponding pipelines, the right support shaft 104 is provided with a first connection port 1044 for connection corresponding to the liquid inlet pipe 105 and a second connection port 1045 for connection corresponding to the liquid outlet pipe 106.

[0061] Further, as Figure 8 shown, in order to prevent the coolant in the liquid inlet channel 1041 and the liquid outlet channel from entering the working space 101 through the right support shaft 104, both the liquid inlet channel 1041 and the liquid outlet channel have an axial section extending along the axial direction of the right support shaft 104 and a radial section extending along the radial direction. The openings corresponding to the axial sections are the input port 1042 and the output port 1043, and the openings corresponding to the radial sections on the circumferential surface of the right support shaft 104 are the first connection port 1044 and the second connection port 1045.

[0062] In a possible implementation manner, the cooling housing 103 includes an inner housing 1035 and an outer housing 1036. The outer housing 1036 is sleeved on the outside of the inner housing 1035. The inner housing 1035 and the outer housing 1036 enclose to form a cooling channel 1031. The structure of the cooling housing 103 in this form is simple. By enclosing the cooling channel 1031 with the inner housing 1035 and the outer housing 1036, it is more convenient for local structures to be processed and manufactured.

[0063] Specifically, as Figure 5 shown, the inner housing 1035 includes a first housing section 10351 and a second housing section 10352. The oil inlet 1034 and the mounting surface are located on the first housing section 10351. Grooves are formed at positions along the cooling channel 1031 on the second housing section 10352. The outer housing 1036 is sleeved on the second housing section 10352 and encloses with the corresponding grooves to form the cooling channel 1031.

[0064] In a possible implementation manner, the drive assembly is a planetary reduction motor 5. The drive assembly in this form can provide a greater driving torque.

[0065] Specifically, the planetary reduction motor 5 includes a stator 501, a rotor, and a reduction gearbox 502. The stator 501 cooperates with the inner wall of the cooling housing 103. The rotor is located inside the stator 501 and can drive the planetary gear set in the reduction gearbox 502 to rotate under the action of the stator 501.

[0066] In a possible implementation manner, the drive assembly cooperates with the inner wall of the cooling housing 103 through a bearing 8 and a connecting flange 9 in sequence. The gap of the bearing 8 forms an oil outlet, and there is no need to separately open an outlet. When the lubricating oil level inside the cooling housing 103 exceeds the connecting flange 9 and contacts the bearing 8, it can directly flow into the accommodation space 301 through the gap in the bearing 8.

[0067] Specifically, the oil outlet of this form can keep a certain amount of cooling lubricating oil inside the cooling housing 103 continuously, which can not only lubricate the working components such as the dimensions therein, but also enable the lubricating oil to fully exchange heat with the internal environment of the cooling housing 103.

[0068] It can be understood that as an alternative implementation, an independent oil outlet can also be formed by opening a hole in the wall of the cooling housing 103.

[0069] According to an embodiment of the present invention, on the other hand, a belt conveyor is provided, which includes: at least one of the above-mentioned drum devices and a conveyor belt, and the conveyor belt is in driving cooperation with the outer wall of the drum device.

[0070] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A drum device, characterized in that, Comprising: A bearing unit, including a bearing body (1), a transmission component (2) and a driving component; A working space (101) for installing the transmission component (2) and the driving component is provided inside the bearing body (1), and a cooling channel (1031) for the circulation of coolant is provided inside at least a part of the wall surface around the transmission component (2) to form a cooling surface on its outer wall; the working space (101) has an oil inlet (1034) and an oil outlet communicating with the outside; the driving component is used to drive the transmission component (2) to rotate relative to the bearing body (1); A drum unit, including a drum component (3) sleeved outside the bearing unit and provided with lubricating oil; the drum component (3) is in transmission cooperation with the transmission component (2), and a scraping structure (4) is provided on its inner wall; the scraping structure (4) is used to bring the lubricating oil to the cooling surface for cooling, so that part of the cooled lubricating oil flows through the transmission component (2) and the driving component in the working space (101) from the oil inlet (1034) and then flows back to the drum component (3) along the oil outlet.

2. The drum device according to claim 1, characterized in that, The bearing unit further includes a liquid collecting structure (6) disposed around the oil inlet (1034).

3. The drum device according to claim 2, wherein, The oil inlet (1034) is located at the top of the bearing body (1), the liquid collecting structure (6) is funnel-shaped and has a collecting port (601) at the bottom, and the collecting port (601) is communicated with the oil inlet (1034). And / or, the coolant is cooling water.

4. The drum device according to any one of claims 1 to 3, characterized in that The bearing unit further includes heat dissipation fins (7) disposed on the outer wall of the bearing body (1).

5. The drum device according to claim 4, characterized in that, The bearing body (1) includes a left support shaft (102), a cooling housing (103) and a right support shaft (104) which are sequentially assembled and connected to enclose the working space (101), the cooling channel (1031) is located inside the cooling housing (103) and is spirally arranged along the circumferential direction of the cooling housing (103), and the drum component (3) is respectively assembled and connected with the left support shaft (102) and the right support shaft (104).

6. The drum device according to claim 5, characterized in that, The cooling channel (1031) is arranged in a double helix. And / or, the turning point of the cooling channel (1031) is provided with a rounded corner (10311).

7. The drum device according to claim 5, characterized in that An inlet (1032) and an outlet (1033) communicating with the cooling channel (1031) are provided on the outer wall of the cooling housing (103), the bearing body (1) further includes an inlet pipe (105) and an outlet pipe (106), an inlet channel (1041) and an outlet channel for the circulation of the coolant are provided inside the right support shaft (104), an input port (1042) and an output port (1043) are formed on the end face of the right support shaft (104) corresponding to the inlet channel (1041) and the outlet channel, the inlet (1032) is connected to the inlet channel (1041) through the inlet pipe (105), and the outlet (1033) is communicated with the outlet channel through the outlet pipe (106).

8. The drum device according to claim 5, wherein The cooling housing (103) includes an inner housing (1035) and an outer housing (1036). The outer housing (1036) is sleeved on the outer side of the inner housing (1035). The inner housing (1035) and the outer housing (1036) enclose to form the cooling channel (1031). And / or, the drive assembly is a planetary reduction motor (5).

9. The drum device according to claim 5, wherein, The drive assembly is sequentially matched with the inner wall of the cooling housing (103) through a bearing (8) and a connecting flange (9). The gap of the bearing (8) forms the oil outlet.

10. A belt conveyor, characterized in that, Comprising: At least one drum device according to any one of claims 1 to 9; A conveyor belt, which is in transmission cooperation with the outer wall of the drum device.

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