Double-barrel rotary magnetorheological damper

Abstract

The invention relates to the field of magnetorheological dampers, and discloses a double-barrel rotary magnetorheological damper which comprises a shell, a rotating shaft and an inner barrel, the outer wall of the rotating shaft is rotatably connected into the inner barrel, an inner gap is formed in the inner wall of the inner barrel, and an outer gap is formed in the outer wall of the inner barrel; a first permanent magnet and a second permanent magnet are slidably connected to the top and the bottom of the inner cylinder respectively, the outer wall of the inner cylinder is rotatably connected into the shell, a first magnet exciting coil is fixedly connected into the inner cylinder, an electrifying assembly is arranged at the top of the first magnet exciting coil, and a piston disc is slidably connected into the shell. The magnet exciting coil is used for generating a magnetic field to drive the piston disc to be compressed downwards, air at the bottom is compressed and flows into the heat dissipation holes to push cooling oil to move, and therefore the effect of dissipating heat along with operation of the damper is achieved, the problem that heat dissipation is conducted on the damper only through external air is avoided, and the service life of the damper is prolonged. And therefore, the high efficiency of the double-barrel rotary magnetorheological damper is improved.

Description

Technical Field

[0001] This invention relates to the field of magnetorheological dampers, specifically a double-cylinder rotating magnetorheological damper. Background Technology

[0002] The dual-cylinder rotary magnetorheological damper is an intelligent damping device adapted to rotational motion scenarios. Its core consists of coaxially nested inner and outer cylinders, with an annular gap between the cylinders filled with magnetorheological fluid. Combined with an excitation coil, the damping force is regulated. During operation, the inner cylinder rotates relative to the outer cylinder, causing shearing of the magnetorheological fluid. The magnetic field generated by the energized excitation coil changes the viscosity of the magnetorheological fluid, thereby adjusting the damping force. Using this damper, the increased shear area due to the dual-cylinder structure enhances the damping force output and adjustment range. The coaxial design ensures a more uniform magnetic field distribution, improving utilization and response speed. It can directly couple to rotating components, making it suitable for applications such as wind turbines and robot joints, avoiding energy loss. Furthermore, it features a compact structure, flexible installation, symmetrical design to reduce vibration and noise, leak-proof sealing components, and a heat dissipation design to alleviate heat generation, resulting in high stability and reliability.

[0003] The existing double-cylinder rotary magnetorheological damper operates on the principle of magnetorheological effect, achieving precise adjustment of damping force through magnetic field control. Its core structure consists of coaxially nested inner and outer cylinders. The inner cylinder rotates while the outer cylinder remains fixed, and the annular gap formed by them is filled with magnetorheological fluid. An excitation coil is positioned around the gap. When the inner cylinder rotates relative to the outer cylinder, the magnetorheological fluid experiences shear stress within the gap, generating a basic damping force. When the excitation coil is energized, it generates a magnetic field, the intensity of which varies with the current. Magnetic particles in the magnetorheological fluid align in a chain-like structure along the magnetic field direction, causing a sharp increase in viscosity and a significant rise in shear resistance, thus generating an adjustable additional damping force. By changing the current, the magnetic field strength can be adjusted in real time, achieving continuous and reversible control of the damping force. When the power is off, the magnetic field disappears, the magnetorheological fluid returns to its low-viscosity state, and the damping force returns to its base value, thus flexibly responding to damping requirements under different operating conditions.

[0004] However, in practical applications, the limitations of the heat dissipation mechanism of the double-cylinder rotary magnetorheological damper become a key constraint on its efficient operation. Its special nested double-cylinder structure forms a relatively closed working space. Frictional heat generated by the magnetorheological fluid under high-frequency shearing action, Joule heat when the excitation coil is energized, and hysteresis loss heat caused by magnetic field alternation will continuously accumulate inside. Currently, the mainstream design relies solely on natural convection between the shell and the external air for heat dissipation. This passive heat dissipation method is extremely inefficient. When the damper is under high-frequency vibration or high-load conditions, the heat generation rate far exceeds the dissipation rate, causing the internal temperature to rise sharply in a short period of time. Excessive temperature will not only damage the stability of the magnetorheological fluid, causing the base fluid to evaporate and magnetic particles to agglomerate, significantly reducing the adjustment accuracy and response speed of the damping force, but also accelerate the aging of the excitation coil insulation layer, the decay of the magnetic properties of the permanent magnet, and even cause the seal to fail, resulting in leakage. Ultimately, this will severely weaken the working efficiency and service life of the damper, making it difficult for it to fully play its role in high-performance demand scenarios such as high-speed rotating machinery and strong vibration equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a double-cylinder rotating magnetorheological damper, which solves the problem of low efficiency in dissipating heat generated by the damper using only external air.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a double-cylinder rotary magnetorheological damper, comprising a shell, a rotating shaft, and an inner cylinder, wherein the outer wall of the rotating shaft is rotatably connected to the inside of the inner cylinder, the inner wall of the inner cylinder has an inner gap, the outer wall of the inner cylinder has an outer gap, a permanent magnet one and a permanent magnet two are slidably connected to the top and bottom of the inner cylinder respectively, the outer wall of the inner cylinder is rotatably connected to the inside of the shell, an excitation coil one is fixedly connected to the inside of the inner cylinder, an energizing component is provided on the top of the excitation coil one, a piston disc is slidably connected to the inside of the shell, a permanent magnet three is fixedly connected to the top of the piston disc, and multiple heat dissipation components are provided inside the shell;

[0007] Each of the heat dissipation components includes a sealing ring one and a sealing ring two. Multiple heat dissipation holes are provided inside the housing. The outer wall of the sealing ring one is slidably connected to the inside of the heat dissipation holes, and the outer wall of the sealing ring two is slidably connected to the inside of the heat dissipation holes. The sealing ring one and the sealing ring two are arranged in a symmetrical array inside the heat dissipation holes.

[0008] The outer shell is provided with sealing components at both ends, and a magnetic component is provided at the bottom of the outer shell. Both ends of the outer shell are provided with connecting components to connect the sealing components to both ends of the outer shell. The top and bottom of the inner cylinder are provided with multiple fixing components to fix permanent magnet one and permanent magnet two. The top of the piston disc is provided with a docking component to connect the piston disc to the rotating shaft. The bottom of the outer shell is provided with an acceleration component to increase the flow rate of air entering the heat dissipation hole.

[0009] Preferably, the power supply component includes a power supply wire, the bottom end of which is fixedly connected to the top of the excitation coil, the outer wall of which passes through the rotating shaft and the inner cylinder, and the inner wall of the inner cylinder is provided with a receiving groove.

[0010] Preferably, the sealing assembly includes a top cover and a bottom cover, the bottom of the top cover being slidably connected to the top of the housing, and the top of the bottom cover being slidably connected to the bottom of the housing.

[0011] Preferably, the magnetic component includes an excitation coil two and a power wire two. The outer wall of the excitation coil two is fixedly connected to the top of the bottom cover, the top end of the power wire two is fixedly connected to the bottom of the excitation coil two, and the outer wall of the power wire two passes through the inside of the bottom cover.

[0012] Preferably, the connecting assembly includes a plurality of fixing bolts, the outer wall of each fixing bolt is inserted inside the top cover or the bottom cover, the bottom end of each fixing bolt is inserted into the top or bottom of the outer shell, and a plurality of fixing grooves are provided on one side of the top cover and the bottom cover, and the top end of each fixing bolt is slidably connected inside the fixing groove.

[0013] Preferably, each of the fixing components includes a docking mechanism, a sliding mechanism, and a locking mechanism. The docking mechanism includes a docking block and a connecting block. One end of the docking block is slidably connected to the inner wall of the outer shell, the bottom of the connecting block is fixedly connected to the top of the inner cylinder, and the outer wall of the connecting block is slidably connected to the inside of the docking block.

[0014] Preferably, the sliding mechanism includes a limiting block, one side of which is fixedly connected to one end of the docking block, and the inner wall of the outer shell is provided with a plurality of sliding grooves, the outer wall of which is slidably connected to the inside of the sliding grooves.

[0015] Preferably, the locking mechanism includes two sliding blocks, multiple limiting posts, and multiple pressing strips. The outer wall of each sliding block is slidably connected to both sides of the docking block. One end of each limiting post is fixedly connected to one side of the sliding block, and the outer wall of each limiting post is slidably connected to the inside of the docking block. One side of each pressing strip is fixedly connected to the inside of the sliding block, and the outer wall of each pressing strip is slidably connected to one side of the connecting block.

[0016] Preferably, the docking assembly includes a threaded post and a sliding post, the bottom end of the threaded post is fixedly connected to the top of the piston disc, the outer wall of the threaded post is threadedly connected to the inside of the sliding post, and the outer wall of the sliding post is slidably connected to the inside of the rotating shaft.

[0017] Preferably, the acceleration component includes multiple contraction walls, the outer wall of each contraction wall is fixedly connected to the inside of the bottom cover, and the contraction walls are arranged in a ring array on the top of the sliding column.

[0018] This invention provides a double-cylinder rotary magnetorheological damper. It has the following beneficial effects:

[0019] 1. This invention utilizes the magnetic field generated by the excitation coil one inside the inner cylinder to drive the permanent magnet three on the top of the piston disc to move. Under the action of the magnetic field, the magnet three is compressed downward, causing the air at the bottom to be compressed and flow into the heat dissipation hole. This, in turn, pushes the cooling oil sealed by sealing ring one and sealing ring two upward. When the piston disc moves to the bottom, the excitation coil two on the top of the bottom cover is energized to generate a magnetic field that pushes the piston disc upward back, causing the cooling oil to move downward. This achieves the effect of heat dissipation on the outer shell of the damper while it is running, avoiding the problem of low efficiency in dissipating the heat generated by the damper by relying solely on external air. This improves the efficiency of the double-cylinder rotary magnetorheological damper.

[0020] 2. In this invention, the fixing bolts are first removed using a tool, allowing the top and bottom covers to be detached from the outer shell. Then, the piston disc is rotated from the bottom to remove the threaded column from the sliding column. Next, the sliding block is pressed and slid upwards to disengage the outer wall of the extrusion strip from both sides of the connecting block, thereby unlocking permanent magnet one or permanent magnet two. Then, the docking block is grasped and moved upwards or downwards along the sliding groove, allowing the docking block to slide to the outermost side of the sliding groove and be pulled outwards to disengage the limiting block from inside the sliding groove. This achieves the effect of removing and replacing the permanent magnet when its magnetism decreases after long-term use, avoiding the problem that the magnetism of the permanent magnet gradually decreases after long-term use, which reduces the fixing effect of the magnetorheological fluid. This improves the practicality of the double-barrel rotary magnetorheological damper.

[0021] 3. In this invention, when the piston disc moves downward to compress the air inside the damper, this air increases its flow velocity by changing from a large orifice to a small orifice through the contraction wall. Then, it flows into the heat dissipation hole and pushes the cooling oil sealed by sealing ring one and sealing ring two. This achieves the effect of increasing the flow velocity of the air compressed by the piston disc to push the cooling oil, avoiding the problem that the flow velocity of the air after the piston disc is not enough, resulting in a low frequency of up-and-down movement of the cooling oil. This improves the heat dissipation efficiency of the double-barrel rotary magnetorheological damper. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the inner cylinder of the present invention;

[0024] Figure 3 for Figure 2 A magnified view of the structure at point A in the middle;

[0025] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0026] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point C in the middle;

[0027] Figure 6 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0028] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point D in the middle;

[0029] Figure 8 for Figure 6 A magnified schematic diagram of the structure at point E in the middle;

[0030] Figure 9 This is a schematic diagram of the piston disk structure of the present invention;

[0031] Figure 10 for Figure 9 A magnified schematic diagram of the structure at point F in the middle;

[0032] Figure 11 This is a schematic diagram of the internal structure of the bottom cover of the present invention;

[0033] Figure 12 for Figure 11 A magnified schematic diagram of the structure at point G in the middle.

[0034] The components are as follows: 1. Outer shell; 2. Top cover; 3. Bottom cover; 4. Rotating shaft; 5. Inner cylinder; 6. Inner gap; 7. Outer gap; 8. Permanent magnet one; 9. Permanent magnet two; 10. Excitation coil one; 11. Conducting wire one; 12. Receiving groove; 13. Piston disc; 14. Permanent magnet three; 15. Excitation coil two; 16. Conducting wire two; 17. Heat dissipation hole; 18. Sealing ring one; 19. Sealing ring two; 20. Fixing groove; 21. Fixing bolt; 22. Sliding groove; 23. Connecting block; 24. Sliding block; 25. Limiting post; 26. Extrusion strip; 27. Limiting block; 28. Connecting block; 29. ​​Threaded post; 30. Sliding post; 31. Contraction wall. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see the appendix Figure 1 -Appendix Figure 5This invention provides a double-cylinder rotary magnetorheological damper, including an outer shell 1, a rotating shaft 4, and an inner cylinder 5. The outer wall of the rotating shaft 4 is rotatably connected to the inside of the inner cylinder 5. An inner gap 6 is opened on the inner wall of the inner cylinder 5, and an outer gap 7 is opened on the outer wall of the inner cylinder 5. A permanent magnet 8 and a permanent magnet 9 are slidably connected to the top and bottom of the inner cylinder 5, respectively. The outer wall of the inner cylinder 5 is rotatably connected to the inside of the outer shell 1. An excitation coil 10 is fixedly connected inside the inner cylinder 5. An energizing component is provided on the top of the excitation coil 10. A piston disk 13 is slidably connected inside the outer shell 1. A permanent magnet 14 is fixedly connected to the top of the piston disk 13. Multiple heat dissipation components are provided inside the outer shell 1.

[0037] Each heat dissipation component includes a first sealing ring 18 and a second sealing ring 19. Multiple heat dissipation holes 17 are provided inside the outer casing 1. The outer wall of the first sealing ring 18 is slidably connected to the inside of the heat dissipation hole 17, and the outer wall of the second sealing ring 19 is slidably connected to the inside of the heat dissipation hole 17. The first sealing ring 18 and the second sealing ring 19 are arranged in a symmetrical array inside the heat dissipation hole 17.

[0038] Sealing components are provided at both ends of the outer shell 1, a magnetic component is provided at the bottom of the outer shell 1, and connecting components are provided at both ends of the outer shell 1 to connect the sealing components to both ends of the outer shell 1. Multiple fixing components are provided at the top and bottom of the inner cylinder 5 to fix the permanent magnet 8 and the permanent magnet 9. A docking component is provided at the top of the piston disc 13 to connect the piston disc 13 to the rotating shaft 4. An acceleration component is provided at the bottom of the outer shell 1 to increase the flow rate of the air entering the heat dissipation hole 17.

[0039] The power supply assembly includes a power supply wire 11, the bottom end of which is fixedly connected to the top of the excitation coil 10. The outer wall of the power supply wire 11 passes through the rotating shaft 4 and the inner cylinder 5. The inner wall of the inner cylinder 5 is provided with a receiving groove 12.

[0040] The sealing assembly includes a top cover 2 and a bottom cover 3. The bottom of the top cover 2 is slidably connected to the top of the outer casing 1, and the top of the bottom cover 3 is slidably connected to the bottom of the outer casing 1.

[0041] The magnetic assembly includes an excitation coil 2 15 and a power line 2 16. The outer wall of the excitation coil 2 15 is fixedly connected to the top of the bottom cover 3, the top of the power line 2 16 is fixedly connected to the bottom of the excitation coil 2 15, and the outer wall of the power line 2 16 passes through the inside of the bottom cover 3.

[0042] The connecting assembly includes multiple fixing bolts 21. The outer wall of each fixing bolt 21 passes through the inside of the top cover 2 or the bottom cover 3. The bottom end of each fixing bolt 21 passes through the top or bottom of the outer shell 1. Multiple fixing grooves 20 are opened on one side of the top cover 2 and the bottom cover 3. The top end of each fixing bolt 21 is slidably connected to the inside of the fixing groove 20.

[0043] Specifically, as the shaft 4 rotates, the excitation coil 10 is energized to generate a magnetic field. This magnetic field repels the magnetic field generated by the permanent magnet 14 on the top of the piston disc 13, causing the piston disc 13 to move downwards and compress the air at the bottom of the outer casing 1. This air is then forced into the heat dissipation hole 17, pushing the cooling oil sealed by the sealing rings 18 and 19 upwards to absorb the heat generated inside the damper. When the piston disc 13 reaches the bottom of the outer casing 1, the power line 16 begins to supply current to the excitation coil 15, generating a magnetic field that repels the permanent magnet 14. This, in turn, pushes the piston disc 13 upwards, drawing out the air from the heat dissipation hole 17. This, in turn, causes the cooling oil sealed by the sealing rings 18 and 19 to move downwards to absorb the heat generated inside the damper. This cycle is repeated, allowing the heat generated inside the damper to be absorbed by the cooling oil, thus achieving rapid heat dissipation for the damper.

[0044] Please see the appendix Figure 6 - Appendix Figure 10 Each fixed component includes a docking mechanism, a sliding mechanism, and a locking mechanism. The docking mechanism includes a docking block 23 and a connecting block 28. One end of the docking block 23 is slidably connected to the inner wall of the outer shell 1, the bottom of the connecting block 28 is fixedly connected to the top of the inner cylinder 5, and the outer wall of the connecting block 28 is slidably connected to the inside of the docking block 23.

[0045] The sliding mechanism includes a limiting block 27, one side of which is fixedly connected to one end of the docking block 23. The inner wall of the outer shell 1 is provided with multiple sliding grooves 22, and the outer wall of the limiting block 27 is slidably connected to the inside of the sliding grooves 22.

[0046] The locking mechanism includes two sliding blocks 24, multiple limiting posts 25, and multiple pressing strips 26. The outer wall of each sliding block 24 is slidably connected to both sides of the mating block 23. One end of each limiting post 25 is fixedly connected to one side of the sliding block 24. The outer wall of each limiting post 25 is slidably connected to the inside of the mating block 23. One side of each pressing strip 26 is fixedly connected to the inside of the sliding block 24. The outer wall of each pressing strip 26 is slidably connected to one side of the connecting block 28.

[0047] The docking assembly includes a threaded post 29 and a sliding post 30. The bottom end of the threaded post 29 is fixedly connected to the top of the piston disc 13, the outer wall of the threaded post 29 is threadedly connected to the inside of the sliding post 30, and the outer wall of the sliding post 30 is slidably connected to the inside of the rotating shaft 4.

[0048] Specifically, when the magnetic force of permanent magnet 8 or permanent magnet 9 decreases due to prolonged use, thus affecting the fixation of the rotating shaft 4, the operator first uses tools to remove the fixing bolt 21 from the fixing groove 20, allowing the top cover 2 and bottom cover 3 to be unlocked from both ends of the outer casing 1 and removed from the outside of the outer casing 1. Then, the operator holds the bottom of the piston disc 13 and rotates it so that the top threaded post 29 disengages from the sliding post 30, removing the piston disc 13 from the bottom of the rotating shaft 4. Afterward, the operator operates on all the mating blocks 23 in sequence, holding the sliding blocks 24 on both sides of one of the mating blocks 23 and sliding it upward, causing the extrusion strip 26 on its inner wall to disengage from both sides of the connecting block 28 to unlock the mating block 23. Finally, the operator holds the mating block 23 and lifts it upward. Slide the limiting block 27 inside the sliding groove 22 and move the limiting block 27 to the top of the sliding groove 22. Then pull out the docking block 23 to remove the limiting block 27 from the sliding groove 22, thereby removing the docking block 23. Repeat the same operation on all docking blocks 23 to remove them, thereby unlocking permanent magnet 1 8 and permanent magnet 2 9. Then grasp the top of permanent magnet 1 8 or permanent magnet 2 9 and lift it upwards to separate it from the top or bottom of the inner cylinder 5. Finally, reinstall the new permanent magnet 1 8 or permanent magnet 2 9 onto the top or bottom of the inner cylinder 5 and remove the corresponding docking block 23 to fix permanent magnet 1 8 or permanent magnet 2 9, thereby completing the replacement of permanent magnet 1 8 or permanent magnet 2 9.

[0049] Please see the appendix Figure 11 and attached Figure 12 The acceleration component includes multiple contraction walls 31, the outer wall of each contraction wall 31 is fixedly connected to the inside of the bottom cover 3, and the contraction walls 31 are arranged in a ring array on the top of the sliding column 30.

[0050] Specifically, when the piston disc 13 moves downward and compresses the air at the bottom of the outer casing 1, this air is first compressed by the contraction wall 31 to increase its flow rate before entering the heat dissipation hole 17 to push the cooling oil sealed by the sealing ring 18 and the sealing ring 19 upward, preventing the sealing ring 18 and the sealing ring 19 from being unable to be pushed due to the low flow rate of this part of the air, thus affecting the heat dissipation of the damper.

[0051] Working Principle: In the use of the double-cylinder rotary magnetorheological damper, the rotating shaft 4 is connected to the equipment to control its rotation angle. When the shaft 4 needs to rotate, the power supply wire 11 supplies current to the excitation coil 10, causing it to generate a magnetic field that cancels out the magnetic fields generated by permanent magnets 8 and 9. This causes the magnetorheological fluid inside the inner gap 6 and outer gap 7 to change its properties to liquid, allowing the shaft 4 to rotate smoothly. When the angle of the shaft 4 needs to be fixed, the power supply to the power supply wire 11 is cut off, preventing the excitation coil 10 from generating a magnetic field. This allows permanent magnets 8 and 9 to generate a magnetic field, causing the magnetorheological fluid inside the inner gap 6 and outer gap 7 to change its properties to solid, thus fixing the shaft 4 and inner cylinder 5 inside the outer shell 1. Then, the angle of the rotating shaft 4 is fixed. During the use of the damper, as the rotating shaft 4 rotates, the excitation coil 10 will be energized to generate a magnetic field. This magnetic field repels the magnetic field generated by the permanent magnet 14 at the top of the piston disc 13, causing the piston disc 13 to move downward to compress the air at the bottom. After passing through the contraction wall 31 and increasing the flow rate, the air enters the heat dissipation hole 17, which in turn pushes the cooling oil sealed by the sealing ring 18 and the sealing ring 19 to move upward to absorb the heat generated inside the damper. Then, current is passed into the excitation coil 15 through the wire 16 to generate a magnetic field that repels the permanent magnet 14, and pushes the piston disc 13 to move upward, which in turn drives the air inside the heat dissipation hole 17 to flow out and causes the cooling oil to move downward to absorb the heat generated inside the damper.

[0052] When the magnetic force of permanent magnet 8 or permanent magnet 9 decreases due to prolonged use, affecting the fixation of the rotating shaft 4, the operator first uses tools to remove the fixing bolt 21 from the fixing groove 20, allowing the top cover 2 and bottom cover 3 to be unlocked from the top and bottom of the outer casing 1 and removed from the outside of the outer casing 1. Then, the operator holds the bottom of the piston disc 13 and rotates it to disengage the threaded column 29 from the bottom end of the sliding column 30, thus removing the piston disc 13 from the bottom of the rotating shaft 4. Afterward, the operator holds the sliding blocks 24 on both sides of one of the mating blocks 23 and slides it upward, causing the extrusion strip 26 on its inner wall to... The connecting block 28 is disengaged from both sides to unlock the docking block 23. The docking block 23 is then grasped and lifted upwards to allow the limiting block 27 to slide inside the sliding groove 22. The position of the limiting block 27 is then moved to the top of the sliding groove 22, and the docking block 23 is pulled outwards to allow the limiting block 27 to disengage from inside the sliding groove 22. Then, all docking blocks 23 are operated and removed in sequence to unlock permanent magnet 1 8 and permanent magnet 2 9 and remove them from the top or bottom of the inner cylinder 5 for replacement. Finally, the docking blocks 23 are reinstalled to fix permanent magnet 1 8 and permanent magnet 2 9.

Claims

1. A double-cylinder rotary magnetorheological damper, characterized in that, include: The outer shell (1), the rotating shaft (4) and the inner cylinder (5) are rotatably connected to the inner cylinder (5) from the outer wall. The inner wall of the inner cylinder (5) has an inner gap (6) and the outer wall of the inner cylinder (5) has an outer gap (7). The top and bottom of the inner cylinder (5) are slidably connected to a first permanent magnet (8) and a second permanent magnet (9). The outer wall of the inner cylinder (5) is rotatably connected to the inner shell (1). The inner cylinder (5) is fixedly connected to an excitation coil (10). The top of the excitation coil (10) is provided with a power-conducting component. The inner shell (1) is slidably connected to a piston disc (13). The top of the piston disc (13) is fixedly connected to a third permanent magnet (14). The inner shell (1) is provided with multiple heat dissipation components. Each of the heat dissipation components includes a first sealing ring (18) and a second sealing ring (19). The housing (1) has multiple heat dissipation holes (17) inside. The outer wall of the first sealing ring (18) is slidably connected to the inside of the heat dissipation hole (17), and the outer wall of the second sealing ring (19) is slidably connected to the inside of the heat dissipation hole (17). The first sealing ring (18) and the second sealing ring (19) are arranged in a symmetrical array inside the heat dissipation hole (17). The outer shell (1) is provided with sealing components at both ends, and a magnetic component is provided at the bottom of the outer shell (1). Both ends of the outer shell (1) are provided with connecting components to connect the sealing components to both ends of the outer shell (1). The top and bottom of the inner cylinder (5) are provided with multiple fixing components to fix permanent magnet one (8) and permanent magnet two (9). The top of the piston disk (13) is provided with a docking component to connect the piston disk (13) with the rotating shaft (4). The bottom of the outer shell (1) is provided with an acceleration component to increase the flow rate of air entering the heat dissipation hole (17).

2. The double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The power supply assembly includes a power supply wire (11), the bottom end of which is fixedly connected to the top of the excitation coil (10). The outer wall of the power supply wire (11) passes through the rotating shaft (4) and the inner cylinder (5). The inner wall of the inner cylinder (5) is provided with a receiving groove (12).

3. The double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The sealing assembly includes a top cover (2) and a bottom cover (3). The bottom of the top cover (2) is slidably connected to the top of the outer shell (1), and the top of the bottom cover (3) is slidably connected to the bottom of the outer shell (1).

4. A double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The magnetic component includes an excitation coil (15) and a power line (16). The outer wall of the excitation coil (15) is fixedly connected to the top of the bottom cover (3), and the top of the power line (16) is fixedly connected to the bottom of the excitation coil (15). The outer wall of the power line (16) passes through the inside of the bottom cover (3).

5. A double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The connecting assembly includes multiple fixing bolts (21), the outer wall of each fixing bolt (21) is inserted inside the top cover (2) or the bottom cover (3), the bottom end of each fixing bolt (21) is inserted into the top or bottom of the outer shell (1), and multiple fixing grooves (20) are opened on one side of the top cover (2) and the bottom cover (3), and the top end of each fixing bolt (21) is slidably connected inside the fixing groove (20).

6. A double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, Each of the fixed components includes a docking mechanism, a sliding mechanism and a locking mechanism. The docking mechanism includes a docking block (23) and a connecting block (28). One end of the docking block (23) is slidably connected to the inner wall of the outer shell (1). The bottom of the connecting block (28) is fixedly connected to the top of the inner cylinder (5). The outer wall of the connecting block (28) is slidably connected to the inside of the docking block (23).

7. A double-cylinder rotary magnetorheological damper according to claim 6, characterized in that, The sliding mechanism includes a limiting block (27), one side of which is fixedly connected to one end of the docking block (23). The inner wall of the outer shell (1) is provided with multiple sliding grooves (22), and the outer wall of the limiting block (27) is slidably connected to the inside of the sliding grooves (22).

8. A double-cylinder rotary magnetorheological damper according to claim 6, characterized in that, The locking mechanism includes two sliding blocks (24), multiple limiting posts (25) and multiple pressing strips (26). The outer wall of each sliding block (24) is slidably connected to both sides of the docking block (23). One end of each limiting post (25) is fixedly connected to one side of the sliding block (24). The outer wall of each limiting post (25) is slidably connected to the inside of the docking block (23). One side of each pressing strip (26) is fixedly connected to the inside of the sliding block (24). The outer wall of each pressing strip (26) is slidably connected to one side of the connecting block (28).

9. A double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The docking assembly includes a threaded post (29) and a sliding post (30). The bottom end of the threaded post (29) is fixedly connected to the top of the piston disc (13). The outer wall of the threaded post (29) is threadedly connected to the sliding post (30). The outer wall of the sliding post (30) is slidably connected to the inside of the rotating shaft (4).

10. A double-cylinder rotary magnetorheological damper according to claim 1, characterized in that, The acceleration component includes multiple contraction walls (31), the outer wall of each contraction wall (31) is fixedly connected to the inside of the bottom cover (3), and the contraction walls (31) are arranged in a ring array on the top of the sliding column (30).

Images