Clean heavy-load magnetic coupling transmission device

Abstract

The utility model provides a clean heavy-load magnetic coupling transmission device which comprises a bearing frame, a sealing cover is arranged on the bearing frame, an outer rotary magnet and an inner rotary magnet are arranged outside and inside the sealing cover respectively, a transmission shaft is arranged on the inner rotary magnet, an upper bearing is arranged on the sealing cover, and the transmission shaft is rotationally connected with the sealing cover through the upper bearing. The upper bearing is positioned below the inner rotary magnet; a cooling structure and a sealing structure are further arranged on the bearing frame. The transmission device for the stirring reaction kettle solves the technical problems that an existing magnetic coupling transmission device is poor in loading capacity, poor in lubricating effect and prone to polluting materials in the kettle due to the structural defects of the existing magnetic coupling transmission device, and belongs to the technical field of manufacturing of transmission devices for stirring reaction kettles.

Description

Technical Field

[0001] The present application relates to the technical field of manufacturing transmission devices for stirred reactors, and in particular to a clean and heavy-load magnetic coupling transmission device. Background Art

[0002] With the rapid development of my country's machinery industry, the market demand for magnetic coupling transmission devices is increasing day by day. Magnetic coupling transmission devices have gradually become key equipment in production lines and are widely used due to their excellent performance such as reliable sealing, high temperature and high pressure resistance, strong corrosion resistance, and easy maintenance. Therefore, the research on magnetic coupling transmission devices is of great significance.

[0003] From the perspective of the structure of the magnetic coupling transmission device, its rolling bearing is located in the limited space of the sealing cover, which inevitably leads to two difficult-to-overcome quality problems. First, the narrow size and space cause the bearing model design to be generally small, resulting in weak bearing load capacity, making the bearing strength the short board in the entire stability system, especially when dealing with impact loads under instantaneous pressure relief conditions, failures often occur, and frequent shutdowns and overhauls are required, resulting in short maintenance and replacement cycles, and even production stagnation and paralysis, making it difficult to improve the production efficiency of the entire production line. Second, the built-in structure of the bearing makes the bearing grease extremely susceptible to the high temperature and gas phase materials in the kettle, or poor stability, or diluted by materials, or mixed and crystallized and ineffective, unable to play a lubricating role for a long time, resulting in bearing damage. What is more serious is that the bearing grease is emulsified by rolling shear and penetrates into the reactor along the rotating axis, causing the materials in the reactor to be contaminated, product quality cannot be guaranteed, and even causes immeasurable economic losses.

[0004] MagnaDrive, a US company, has developed a compact magnetic coupling transmission device, which only relies on increasing the diameter of the body to ensure the bearing size, making the magnetic coupling transmission device particularly bulky. Its oil blocking method also relies solely on a small gap labyrinth ring, which cannot achieve the desired effect, especially for high-speed or high-temperature kettles. At present, there is almost no research on heavy-duty magnetic coupling transmission devices in China, and the oil blocking is only achieved by relying on the labyrinth effect of the packing seal, and the actual use effect is unreliable. The above problems need to be solved urgently. Summary of the invention

[0005] The purpose of this application is to provide a clean heavy-load magnetic coupling transmission device, aiming to solve the technical problems of existing magnetic coupling transmission devices due to their structural defects, resulting in weak load capacity, poor lubrication effect, and easy contamination of materials in the kettle.

[0006] An embodiment of the present application provides a clean and heavy-load magnetic coupling transmission device, including a support frame, a sealing cover is provided on the support frame, an outer rotating magnet and an inner rotating magnet are respectively provided on the outside and inside of the sealing cover, a transmission shaft is provided on the inner rotating magnet, an upper bearing is provided on the sealing cover, the transmission shaft is rotatably connected to the sealing cover through the upper bearing, and the upper bearing is located below the inner rotating magnet; a cooling structure and a sealing structure are also provided on the support frame.

[0007] In one of the embodiments, the sealing cover is further provided with a second upper bearing, the second upper bearing is located above the upper bearing, and the transmission shaft is rotatably connected to the sealing cover via the second upper bearing and the upper bearing; the support frame is provided with a lower bearing, and the transmission shaft is rotatably connected to the support frame via the lower bearing.

[0008] In one embodiment, the upper bearing and the lower bearing are both angular contact ball bearings, and the second upper bearing is a thrust ball bearing.

[0009] In one embodiment, the cooling structure includes a supporting water jacket, the outer side of the sealing cover is provided with a third flange, the third flange is located above the supporting frame and connected to the supporting frame, the supporting water jacket is arranged on the third flange, and the supporting water jacket is located on the outer side of the external rotating magnet; the supporting water jacket is provided with a first cooling water inlet, a first cooling water outlet and a cooling water overflow port in sequence from bottom to top.

[0010] In one embodiment, a first flange is provided at the top of the supporting water jacket, and a second flange is provided at the top of the outer rotating magnet. The second flange is rotatably connected to the first flange via a bearing.

[0011] In one embodiment, the cooling structure also includes a support frame water jacket, the support frame water jacket includes a second cooling water inlet and a second cooling water outlet, a fourth flange is provided at the bottom end of the support frame, the second cooling water inlet is provided on the fourth flange, and the second cooling water outlet is provided on the support frame.

[0012] In one embodiment, the cooling structure also includes a cooling nipple, a fifth flange is provided at the bottom end of the fourth flange, the cooling nipple is sleeved on the outside of the transmission shaft and its upper part is located in the fifth flange; a third cooling water inlet and a third cooling water outlet are provided on the fifth flange.

[0013] In one embodiment, the sealing structure includes a mechanical seal and an upper packing seal, both of which are sleeved on the outside of the transmission shaft and located in the fourth flange, and the mechanical seal is located above the upper packing seal.

[0014] In one embodiment, the sealing structure further includes a skeleton oil seal, which is sleeved on the outer side of the transmission shaft and located inside the fifth flange.

[0015] In one embodiment, the sealing structure further includes a lower packing seal and a floating ring. The lower packing seal and the floating ring are both sleeved on the outside of the transmission shaft and located in the cooling nipple. The floating ring is located below the lower packing seal.

[0016] The present application provides a clean heavy-load magnetic coupling transmission device, which has the following beneficial effects compared with the prior art:

[0017] (1) By arranging the upper bearing below the inner rotating magnet, a larger space is provided for the upper bearing, and the size of the upper bearing is increased, thereby increasing the strength of the upper bearing and the load capacity of the coupling transmission device, which can cope with the strong impact load of the fluid on the stirring component under the condition of instantaneous pressure relief of the reactor, thereby increasing the service life of the coupling transmission device;

[0018] (2) By setting up a cooling structure, a lower temperature environment is provided for the bearing, which prevents the bearing grease from being emulsified due to heat and causing internal leakage, so that the bearing is always well lubricated during operation, which improves the service life and stability of the bearing and greatly extends the maintenance cycle. At the same time, it can also prevent the bearing grease from leaking along the transmission shaft into the reactor and causing material contamination, thereby ensuring product quality;

[0019] (3) By setting up a sealing structure, the reaction materials in the reactor can be blocked from evaporating into the coupling transmission device, and the channel for the bearing grease to leak can be completely blocked; the cooling structure and the sealing structure are used in conjunction, so that the coupling transmission device can simultaneously meet the two requirements of protecting the bearing lubrication effect and preventing the material from being contaminated by grease, thereby achieving the purpose of effective lubrication and oil-blocking sealing.

[0020] The present application has a simple structure and a compact overall structure. It can not only withstand strong impact loads, but also solve the problem of internal grease leakage. It has the advantages of high cleanliness and heavy load-bearing ability. It is especially suitable for repeated high-pressure instantaneous discharge, high-temperature and high-water vapor environments, and working conditions with high standards for the cleanliness of the final reaction product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1A schematic structural diagram of a clean heavy-load magnetic coupling transmission device provided in one embodiment of the present application;

[0023] Figure 2 for Figure 1 The enlarged structural schematic diagram of the outer rotating magnet, the inner rotating magnet and the sealing cover of the clean heavy-load magnetic coupling transmission device shown;

[0024] Figure 3 for Figure 1 The enlarged structural schematic diagram of the sealing structure of the clean and heavy-load magnetic coupling transmission device is shown.

[0025] Explanation of symbols in the figure:

[0026] 1. External rotating magnet; 2. Sealing cover; 3. Internal rotating magnet; 4. Support water jacket; 5. Support frame; 6. Upper packing seal; 7. Skeleton oil seal; 8. Lower packing seal; 9. Floating ring; 10. Cooling nipple; 11. Mechanical seal; 12. Lower bearing; 13. Upper bearing; 14. Second upper bearing; 15. Transmission shaft; 16. First flange; 17. Second flange; 18. Third flange; 19. Fourth flange; 20. Fifth flange; 21. First cooling water inlet; 22. First cooling water outlet; 23. Cooling water overflow; 24. Second cooling water inlet; 25. Second cooling water outlet; 26. Third cooling water inlet; 27. Third cooling water outlet; 28. Oil filling port. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed" or "set" to another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] See also Figure 1 , is a schematic diagram of the structure of a clean heavy-duty magnetic coupling transmission device provided in one embodiment of the present application. For the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows:

[0031] In one embodiment, please combine Figure 2 A clean heavy-load magnetic coupling transmission device includes a support frame 5, a sealing cover 2 is provided on the support frame 5, an outer rotating magnet 1 and an inner rotating magnet 3 are provided outside and inside the sealing cover 2 respectively, a transmission shaft 15 is provided on the inner rotating magnet 3, and an upper bearing 13 is provided on the sealing cover 2. The transmission shaft 15 is rotatably connected to the sealing cover 2 through the upper bearing 13, and the upper bearing 13 is located below the inner rotating magnet 3; a cooling structure and a sealing structure are also provided on the support frame 5.

[0032] By arranging the upper bearing 13 below the inner rotating magnet 3, a larger space is provided for the upper bearing 13, and the size of the upper bearing 13 is increased, thereby increasing the strength of the upper bearing 13 and the load capacity of the coupling transmission device. It is able to cope with the strong impact load brought by the fluid to the stirring components under the instantaneous pressure relief condition of the reactor, thereby increasing the service life of the coupling transmission device.

[0033] By setting up a cooling structure, a lower temperature environment is provided for the bearing, so as to avoid the bearing grease from emulsifying due to heat and causing internal leakage, so that the bearing can always maintain good lubrication during operation, thereby improving the service life and stability of the bearing and greatly extending the maintenance cycle. At the same time, it can also prevent the bearing grease from leaking along the transmission shaft 15 into the reactor and causing material contamination, thereby ensuring product quality; by setting up a sealing structure, it can not only block the reaction materials in the reactor from evaporating and rising into the coupling transmission device, but also completely block the channel for the bearing grease to leak internally; the cooling structure and the sealing structure are used in combination, so that the coupling transmission device can simultaneously meet the two requirements of protecting the bearing lubrication effect and preventing the material from being contaminated by grease, thereby achieving the purpose of effective lubrication and oil-blocking sealing.

[0034] For details, please refer to Figure 1 and Figure 2, an outer magnetic steel is arranged on the inner wall of the outer rotating magnet 1, and an inner magnetic steel is arranged on the outer wall of the inner rotating magnet 3. When in use, the outer rotating magnet 1 is used as a driving rotor, and the inner rotating magnet 3 is used as a driven rotor, and contactless torque transmission is achieved by relying on the magnetic induction effect between the two. When in use, the outer rotating magnet 1 is connected to an external motor, and the transmission shaft 15 is connected to a mixer. When the rotating shaft of the external motor drives the outer rotating magnet 1 to rotate around the sealing cover 2, due to the magnetic induction effect between the outer magnetic steel and the inner magnetic steel, the inner rotating magnet 3 rotates synchronously with the outer rotating magnet 1 without contact, thereby driving the transmission shaft 15 thereon to rotate, and then driving the mixer connected to the transmission shaft 15 to rotate, achieving the effect of contactless torque transmission.

[0035] In one embodiment, see Figure 1 and Figure 2 The coupling transmission device also includes a supporting water jacket 4. The outer side of the sealing cover 2 is provided with a third flange 18. The third flange 18 is located above the supporting frame 5 and connected to the supporting frame 5. The supporting water jacket 4 is arranged on the third flange 18. The supporting water jacket 4 is located on the outer side of the outer rotating magnet 1. The top of the supporting water jacket 4 is provided with a first flange 16. The top of the outer rotating magnet 1 is provided with a second flange 17. The second flange 17 is rotatably connected to the first flange 16 through a bearing. When in use, the second flange 17 is connected to the rotating shaft of the external motor. When the rotating shaft of the external motor rotates, the second flange 17 is driven to rotate, thereby driving the outer rotating magnet 1 to rotate around the sealing cover 2. The rotation of the outer rotating magnet 1 drives the inner rotating magnet 3 to rotate synchronously through the magnetic induction effect, thereby driving the transmission shaft 15 thereon to rotate, and then driving the mixer to rotate.

[0036] In one embodiment, see Figure 1 The sealing cover 2 is also provided with a second upper bearing 14, which is located above the upper bearing 13. The transmission shaft 15 is rotatably connected to the sealing cover 2 through the second upper bearing 14 and the upper bearing 13; the support frame 5 is provided with a lower bearing 12, and the transmission shaft 15 is rotatably connected to the support frame 5 through the lower bearing 12. The upper bearing 13 and the lower bearing 12 are used to bear radial loads, and the second upper bearing 14 is used to bear axial loads. The three bearings are all designed with large diameters, and the three are used in combination to further improve the load capacity of the coupling transmission device.

[0037] In one embodiment, see Figure 1, the upper bearing 13 and the lower bearing 12 are both angular contact ball bearings, and the second upper bearing 14 is a thrust ball bearing. In this embodiment, the size of the thrust ball bearing that bears the axial load is increased by six gears, so that the rated load of the thrust ball bearing is increased by 3.5-4 times, and the angular contact ball bearing that bears the radial load is also increased by 1.5-2 times due to the increase in the shaft diameter. According to the actual operation effect, the coupling transmission device can withstand the strong impact load brought by the fluid on the stirring component when the reactor is instantly depressurized at 12.0MPa.

[0038] In one embodiment, see Figure 1 The support frame 5 is provided with an oil filling port 28, which is connected to the upper bearing 13, the second upper bearing 14 and the lower bearing 12, and is used for periodically filling oil therewith to ensure the normal operation of the bearing and to increase the service life of the bearing.

[0039] In one embodiment, see Figure 1 The cooling structure includes a supporting water jacket 4, on which a first cooling water inlet 21, a first cooling water outlet 22 and a cooling water overflow port 23 are sequentially arranged from bottom to top, and the first cooling water inlet 21 is connected with the first cooling water outlet 22 and the cooling water overflow port 23. The supporting water jacket 4 can remove the eddy heat at the sealing cover 2 in time, provide a lower temperature environment for the upper bearing 13 and the second upper bearing 14, avoid the bearing grease from being heated and emulsified and causing internal leakage, so that the bearing always maintains good lubrication during operation, and improves the service life and stability of the bearing.

[0040] In one embodiment, see Figure 1 The cooling structure also includes a support frame water jacket, which includes a second cooling water inlet 24 and a second cooling water outlet 25. The bottom end of the support frame 5 is provided with a fourth flange 19, on which the second cooling water inlet 24 is arranged, and on the support frame 5, the second cooling water outlet 25 is arranged, and the second cooling water inlet 24 is connected with the second cooling water outlet 25. The second cooling water inlet 24 and the second cooling water outlet 25 cool down the lower bearing 12 and the sealing structure inside it, so as to avoid the bearing grease being emulsified by heat and causing internal leakage, so that the bearing is always well lubricated during operation, and the service life and stability of the bearing are improved. At the same time, it can also prevent the bearing grease from leaking internally and penetrating into the reactor along the transmission shaft 15, causing material contamination, thereby ensuring product quality.

[0041] In one embodiment, see Figure 1The cooling structure also includes a cooling nipple 10. A fifth flange 20 is provided at the bottom end of the fourth flange 19. The cooling nipple 10 is sleeved on the outside of the transmission shaft 15 and its upper part is located in the fifth flange 20. A third cooling water inlet 26 and a third cooling water outlet 27 are provided on the fifth flange 20. The third cooling water inlet 26 and the third cooling water outlet 27 are connected. The third cooling water inlet 26 and the third cooling water outlet 27 are used to cool the cooling nipple 10 to prevent the temperature in the reactor from rising. The small gap between the cooling nipple 10 and the transmission shaft 15 prevents the evaporation steam in the reactor from entering the coupling transmission device, thereby protecting the coupling transmission device.

[0042] The support water jacket 4, the support frame water jacket, and the cooling short section 10 are used together to form a three-stage cooling protection. The upper support water jacket 4 can remove the eddy heat and provide a lower temperature environment for the upper bearing 13 and the second upper bearing 14. The middle support frame water jacket cools the lower bearing 12 to ensure the effective effect of the bearing grease at a lower temperature. The lower cooling short section 10 can isolate the temperature in the reactor from rising and prevent the evaporation steam in the reactor from entering the coupling transmission device. The three-stage cooling protection effectively ensures the stable operation of the coupling transmission device, especially in a reaction environment with severe water vapor, which can completely avoid the erosion of the bearing grease caused by the condensation of the rising water vapor, prolong the effective action time of the bearing grease, and greatly improve the service life of the bearing.

[0043] In one embodiment, see Figure 1 and Figure 3 The sealing structure includes a mechanical seal 11, an upper packing seal 6, a skeleton oil seal 7, and a lower packing seal 8. The mechanical seal 11 and the upper packing seal 6 are both sleeved on the outer side of the transmission shaft 15 and located in the fourth flange 19. The mechanical seal 11 is located above the upper packing seal 6. In this embodiment, the mechanical seal 11 is a single-end mechanical seal; the skeleton oil seal 7 is sleeved on the outer side of the transmission shaft 15 and located in the fifth flange 20; the lower packing seal 8 is sleeved on the outer side of the transmission shaft 15 and located in the cooling short section 10. The mechanical seal 11 and the upper packing seal 6 are used in conjunction to seal the bearing grease and avoid internal leakage; the skeleton oil seal 7, the lower packing seal 8 and the cooling short section 10 are used in conjunction to prevent the evaporation steam in the reactor from rising to the inside of the coupling transmission device; the use of multiple sealing means can not only block the reaction materials in the reactor from evaporating and rising to the coupling transmission device, but also completely block the channel for the internal leakage of the bearing grease, thereby increasing the service life of the bearing and ensuring the quality of the product.

[0044] In one embodiment, see Figure 1 and Figure 3The sealing structure also includes a floating ring 9, which is sleeved on the outside of the transmission shaft 15 and located in the cooling nipple 10, and the floating ring 9 is located below the lower packing seal 8. There is a small gap between the floating ring 9 and the transmission shaft 15, and the gap between the floating ring 9 and the lower packing seal 8 is slightly larger than the radial runout of the transmission shaft 15. Therefore, when the floating ring 9 and the transmission shaft 15 move radially during the operation of the coupling transmission device, the floating ring 9 always maintains a small gap with the transmission shaft 15, effectively avoiding the situation where the packing in the lower packing seal 8 is broken or even falls into the reactor due to a sudden change in pressure difference, thereby ensuring the packing effect and product quality.

[0045] In this embodiment, please refer to Figure 1 and Figure 3 The floating ring 9 is a polyetheretherketone (PEEK) floating ring, which has the characteristics of high mechanical strength, high temperature resistance, acid and alkali resistance, hydrolysis resistance, wear resistance and fatigue resistance. In actual use, floating rings of other materials can be selected, depending on the specific working conditions.

[0046] The three-stage cooling protection is used in conjunction with a variety of sealing methods, so that the coupling transmission device can simultaneously meet the two requirements of protecting the bearing lubrication effect and preventing the material from being contaminated by grease, achieving the purpose of effective lubrication and oil-blocking sealing.

[0047] The present application provides a clean heavy-load magnetic coupling transmission device. Compared with the prior art, (1) by arranging the upper bearing below the inner rotating magnet, a larger space is provided for the upper bearing, the size of the upper bearing is increased, thereby increasing the strength of the upper bearing, and increasing the load capacity of the coupling transmission device, so that it can cope with the strong impact load brought by the fluid on the stirring component under the instantaneous pressure relief condition of the reactor, and increase the service life of the coupling transmission device; (2) by arranging a cooling structure, a lower temperature environment is provided for the bearing, so as to avoid the internal leakage of the bearing grease due to heat emulsification, so that the bearing always maintains good lubrication during operation, improves the service life and stability of the bearing, greatly extends the maintenance cycle, and at the same time, it can also prevent the bearing grease from leaking along the transmission shaft into the reactor and causing the material to be contaminated, thereby ensuring the product quality; (3) by arranging a sealing structure, it can not only block the reaction material in the reactor from evaporating and rushing up into the coupling transmission device, but also completely block the channel for the bearing grease to leak internally; the cooling structure and the sealing structure are used in combination, so that the coupling transmission device can simultaneously meet the two requirements of protecting the bearing lubrication effect and preventing the material from being contaminated by grease, thereby achieving the purpose of effective lubrication and oil-blocking sealing. The present application has a simple structure and a compact overall structure. It can withstand strong impact loads and solve the problem of internal grease leakage. It has the advantages of high cleanliness and heavy load bearing. It is particularly suitable for repeated high-pressure instantaneous discharge, high-temperature and high-water vapor environments, and working conditions with high standards for the cleanliness of the final reaction product. It can be widely used in the field of transmission device manufacturing technology for stirred reactors.

[0048] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A clean heavy-load magnetic coupling transmission device, comprising a support frame (5), a sealing cover (2) is provided on the support frame (5), an outer rotating magnet (1) and an inner rotating magnet (3) are provided outside and inside the sealing cover (2), respectively, characterized in that: The inner rotating magnet (3) is provided with a transmission shaft (15), the sealing cover (2) is provided with an upper bearing (13), the transmission shaft (15) is rotatably connected to the sealing cover (2) via the upper bearing (13), and the upper bearing (13) is located below the inner rotating magnet (3); the support frame (5) is also provided with a cooling structure and a sealing structure.

2. The clean heavy-load magnetic coupling transmission device according to claim 1 is characterized in that: The sealing cover (2) is also provided with a second upper bearing (14), the second upper bearing (14) is located above the upper bearing (13), and the transmission shaft (15) is rotatably connected to the sealing cover (2) via the second upper bearing (14) and the upper bearing (13); the support frame (5) is provided with a lower bearing (12), and the transmission shaft (15) is rotatably connected to the support frame (5) via the lower bearing (12).

3. The clean heavy-load magnetic coupling transmission device according to claim 2 is characterized in that: The upper bearing (13) and the lower bearing (12) are both angular contact ball bearings, and the second upper bearing (14) is a thrust ball bearing.

4. The clean heavy-load magnetic coupling transmission device according to claim 1, characterized in that: The cooling structure comprises a supporting water jacket (4), the outer side of the sealing cover (2) is provided with a third flange (18), the third flange (18) is located above the supporting frame (5) and is connected to the supporting frame (5), the supporting water jacket (4) is arranged on the third flange (18), and the supporting water jacket (4) is located on the outer side of the outer rotating magnet (1); the supporting water jacket (4) is provided with a first cooling water inlet (21), a first cooling water outlet (22) and a cooling water overflow port (23) in sequence from bottom to top.

5. The clean heavy-load magnetic coupling transmission device according to claim 4, characterized in that: A first flange (16) is provided at the top end of the supporting water jacket (4), and a second flange (17) is provided at the top end of the outer rotating magnet (1). The second flange (17) is rotatably connected to the first flange (16) via a bearing.

6. The clean heavy-load magnetic coupling transmission device according to claim 1, characterized in that: The cooling structure also includes a support frame water jacket, the support frame water jacket includes a second cooling water inlet (24) and a second cooling water outlet (25), a fourth flange (19) is provided at the bottom end of the support frame (5), the second cooling water inlet (24) is provided on the fourth flange (19), and the second cooling water outlet (25) is provided on the support frame (5).

7. The clean heavy-load magnetic coupling transmission device according to claim 6, characterized in that: The cooling structure also includes a cooling nipple (10), a fifth flange (20) is provided at the bottom end of the fourth flange (19), the cooling nipple (10) is sleeved on the outside of the transmission shaft (15) and its upper part is located in the fifth flange (20); a third cooling water inlet (26) and a third cooling water outlet (27) are provided on the fifth flange (20).

8. The clean heavy-load magnetic coupling transmission device according to claim 6, characterized in that: The sealing structure comprises a mechanical seal (11) and an upper packing seal (6); the mechanical seal (11) and the upper packing seal (6) are both sleeved on the outer side of the transmission shaft (15) and located inside the fourth flange (19); the mechanical seal (11) is located above the upper packing seal (6).

9. The clean heavy-load magnetic coupling transmission device according to claim 7, characterized in that: The sealing structure further comprises a skeleton oil seal (7), wherein the skeleton oil seal (7) is sleeved on the outside of the transmission shaft (15) and is located inside the fifth flange (20).

10. The clean heavy-load magnetic coupling transmission device according to claim 7, characterized in that: The sealing structure further comprises a lower packing seal (8) and a floating ring (9), wherein the lower packing seal (8) and the floating ring (9) are both sleeved on the outside of the transmission shaft (15) and located inside the cooling nipple (10), and the floating ring (9) is located below the lower packing seal (8).

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