A magnetorheological intelligent variable stiffness support

Abstract

The invention discloses a magnetorheological intelligent variable stiffness bearing, which relates to the technical field of building seismic isolation, and comprises a lower base plate and an upper base plate, a separator ring is installed between the lower base plate and the upper base plate, a high-damping rubber bearing is installed inside the separator ring, a return ring is fixedly connected inside the separator ring, and the return rings are evenly distributed on the circumference of the high-damping rubber bearing, magnetorheological dampers are arranged on adjacent sides of the outer walls of a plurality of return rings, and an evenly distributed self-adjusting mechanism is installed on the inner wall of the separator ring for adjusting the stiffness of the magnetorheological damper, an auxiliary magnetic mechanism is arranged between the lower base plate and the upper base plate, the auxiliary magnetic mechanism is arranged outside the magnetorheological damper, and steering assemblies are respectively installed at both ends of the magnetorheological damper; the self-adjusting mechanism can be automatically adjusted during an earthquake, thereby extending the service life of the magnetorheological damper, and the adaptation assembly can realize precise control of the magnetorheological damper, thereby greatly improving the control effect of the bearing on structural vibration.

Description

Technical Field

[0001] The invention relates to the technical field of building seismic isolation, in particular to a magnetorheological intelligent variable stiffness bearing. Background Art

[0002] In today's engineering construction field, whether it is a high-rise building or an industrial plant, all types of building structures face severe challenges from dynamic loads such as earthquakes, wind vibrations, and mechanical vibrations. Traditional bearings gradually reveal obvious limitations when dealing with these complex dynamic load conditions.

[0003] High-damping shock-absorbing rubber bearings are widely used as seismic isolation devices. Although their stiffness characteristics remain basically fixed after manufacturing, and they can effectively isolate and reduce the vibration transmission of the structure under the designed earthquake intensity, their performance is still insufficient under extreme conditions. Once they encounter strong earthquakes or loads beyond the design range, due to the fixed stiffness, they cannot be adjusted in real time according to changes in external excitations, and it is often difficult to effectively control the displacement response of the structure, which can easily lead to excessive deformation of the building structure and even cause serious structural damage, posing a huge threat to life safety and property.

[0004] At the same time, although traditional passive control damping devices (such as ordinary hydraulic dampers) can provide a certain damping force to consume vibration energy, they lack active adaptation and intelligent adjustment capabilities and can only work according to preset damping characteristics. They cannot flexibly adjust the damping force to meet the actual vibration state and needs of the structure. In a complex and changeable dynamic load environment, this limitation makes it difficult to accurately control the vibration of the structure, and the isolation and vibration reduction effect is greatly reduced. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a magnetorheological intelligent variable stiffness bearing, which solves the problem that traditional seismic isolation bearings lack active adaptability and intelligent adjustment capabilities and cannot flexibly change the damping force according to the actual vibration state and needs of the structure.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a magnetorheological intelligent variable stiffness bearing, comprising a lower base plate and an upper base plate, a separator ring is installed between the lower base plate and the upper base plate, a high damping rubber bearing is installed inside the separator ring, a return ring is fixedly connected inside the separator ring, and the return rings are evenly distributed on the circumference of the high damping rubber bearing, a magnetorheological damper is arranged on the adjacent side of the outer walls of the plurality of return rings for supporting the high damping rubber bearing, a uniformly distributed self-adjusting mechanism is installed on the inner wall of the separator ring for adjusting the stiffness of the magnetorheological damper, an auxiliary magnetic mechanism is arranged between the lower base plate and the upper base plate, the auxiliary magnetic mechanism is arranged on the outside of the magnetorheological damper, steering assemblies are respectively installed at both ends of the magnetorheological damper, and the steering assemblies are fixedly connected to the lower base plate or the upper base plate.

[0007] Preferably, the self-adjusting mechanism includes a fixed plate, which is installed at both vertical ends of the separating ring; a porcelain tube is installed on the outer wall of the fixed plate at one vertical end of the separating ring, and a coil is wound on the outer wall of the porcelain tube; one end of a metal rod is installed on the outer wall of the fixed plate at the other vertical end of the separating ring; a sliding plate is fixedly connected to the other end of the metal rod, and the sliding plate is slidably connected to the outer wall of the coil; terminal posts are installed on the outer walls of the metal rod and the porcelain tube, respectively, and an adaptation component is arranged inside the sliding plate and the coil.

[0008] Preferably, the auxiliary magnetic mechanism includes a fixing ring, which is fixedly connected to the lower surface of the upper base plate, the bottom wall of the fixing ring is connected to a plurality of magnetic core tubes, the upper surface of the lower base plate is fixedly connected to one end of a support frame, the other end of the support frame is fixedly connected to an auxiliary coil, one end of the magnetic core tube passes through the auxiliary coil, and magnetic beads are slidably connected inside the fixing ring and the magnetic core tube, one end of the magnetic beads is connected to a rebound assembly, and the rebound assembly is installed inside the fixing ring.

[0009] Preferably, the steering assembly includes a rotating column, one end of which is rotatably connected to the outer wall of the magnetorheological damper, the other end of which is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is rotatably connected to a fixed seat, and the fixed seat is installed on the lower base plate or the upper base plate.

[0010] Preferably, the adapting component comprises a limit frame, which is fixedly connected to the outer wall of the porcelain cylinder, and a roller is rotatably connected to one side of the outer wall of the sliding piece, and the roller is slidably connected to the inside of the limit frame.

[0011] Preferably, one end of an external wire is wound around the outer wall of the terminal, and the other end of the external wire is electrically connected to the magnetorheological damper.

[0012] Preferably, the rebound assembly includes tension springs, which are installed at both ends inside the fixing ring, one end of the two tension springs is fixedly connected to the same circular plate, the inside of the magnetic beads are connected by a connecting rope, one end of the connecting rope is connected to the circular plate.

[0013] Preferably, one end of a bent rod is installed inside the fixing ring, and the other end of the bent rod passes through the tension spring.

[0014] Preferably, the auxiliary coil is electrically connected to the magnetorheological damper via an auxiliary wire.

[0015] The present invention provides a magnetorheological intelligent variable stiffness bearing, which has the following beneficial effects:

[0016] 1. The self-adjusting mechanism of the present invention adjusts the number of coil turns through a sliding vane to achieve precise control of the magnetic field strength and stiffness of the magnetorheological damper. During an earthquake, the mechanism can automatically adjust to provide further auxiliary protection for the support and the buildings connected to it. In addition, there is no need for complex signal transmission and conversion, thereby effectively reducing energy consumption, extending the service life of the magnetorheological damper, and reducing maintenance costs.

[0017] 2. The auxiliary magnetic mechanism of the present invention, with the help of the cooperation of auxiliary coils and magnetic beads, changes the magnetic field distribution around the magnetic core tube according to the vibration conditions during an earthquake, and provides an auxiliary magnetic field for the magnetorheological damper, which can further increase the viscosity and yield stress of the magnetorheological fluid, improve the damping force of the magnetorheological damper, and enhance the ability of the support to suppress structural vibration and displacement, effectively improve the seismic performance of the support, ensure the safety of the building structure in disasters such as earthquakes, and reduce the risk of structural damage.

[0018] 3. The present invention provides a stable sliding trajectory for the slider by cleverly combining the limit frame and the roller in the adaptation component. Even when the coil and the slider are relatively tilted due to the vibration environment, the accuracy of the turns adjustment can still be ensured, thereby achieving precise control of the magnetorheological damper, effectively improving the performance stability of the support under various working conditions, and avoiding control errors caused by external interference, greatly improving the control effect of the support on structural vibration, and providing reliable protection for seismic isolation and vibration reduction needs in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a magnetorheological intelligent variable stiffness bearing proposed by the present invention;

[0020] Figure 2 A top view of a magnetorheological intelligent variable stiffness support proposed by the present invention;

[0021] Figure 3 A cross-sectional view of a magnetorheological intelligent variable stiffness bearing proposed by the present invention;

[0022] Figure 4 A schematic diagram of a self-adjusting mechanism of a magnetorheological intelligent variable stiffness support proposed by the present invention;

[0023] Figure 5 for Figure 4 A is an enlarged structural diagram;

[0024] Figure 6 for Figure 4 The enlarged structural diagram at B in FIG.

[0025] Figure 7 A schematic diagram of an auxiliary magnetic mechanism of a magnetorheological intelligent variable stiffness support proposed by the present invention;

[0026] Figure 8 A bottom view of an auxiliary magnetic mechanism of a magnetorheological intelligent variable stiffness support proposed by the present invention;

[0027] Fig. 9 for Figure 8 The enlarged structural diagram at C in the figure.

[0028] Among them, 1. lower base plate; 2. separation ring; 3. high damping rubber bearing; 4. return ring; 5. magnetorheological damper; 6. self-adjusting mechanism; 601. fixed plate; 602. porcelain tube; 603. coil; 604. metal rod; 605. slide; 606. terminal; 607. adaptation component; 608. limit frame; 609. external line; 610. roller; 7. auxiliary magnetic mechanism; 701. fixed ring; 702. magnetic core tube; 703. support frame; 704. auxiliary coil; 705. magnetic beads; 706. rebound component; 707. tension spring; 708. round plate; 709. connecting rope; 711. bent rod; 712. auxiliary wire; 8. steering component; 801. rotating column; 802. rotating shaft; 803. fixed seat; 9. upper base plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Please refer to the attached Figure 1 -Attached Fig. 9 An embodiment of the present invention provides a magnetorheological intelligent variable stiffness bearing, including a lower base plate 1 and an upper base plate 9, a separator ring 2 is installed between the lower base plate 1 and the upper base plate 9, a high damping rubber bearing 3 is installed inside the separator ring 2, a plurality of return rings 4 are fixedly connected inside the separator ring 2, and the return rings 4 are evenly distributed on the circumference of the high damping rubber bearing 3, a magnetorheological damper 5 is arranged on one adjacent side of the outer wall of the plurality of return rings 4, a uniformly distributed self-adjusting mechanism 6 is installed on the inner wall of the separator ring 2, for adjusting the stiffness of the magnetorheological damper 5, an auxiliary magnetic mechanism 7 is arranged between the lower base plate 1 and the upper base plate 2, the auxiliary magnetic mechanism 7 is arranged outside the magnetorheological damper 5, and steering assemblies 8 are respectively installed at both ends of the magnetorheological damper 5, and the steering assembly 8 is fixedly connected to the lower base plate or the upper base plate.

[0031] The self-adjusting mechanism 6 includes a fixing plate 601, which is installed at both vertical ends of the separation ring 2. A porcelain tube 602 is installed on the outer wall of the fixing plate 601 at one vertical end of the separation ring 2, and a coil 603 is wound around the outer wall of the porcelain tube 602. One end of a metal rod 604 is installed on the outer wall of the fixing plate 601 at the other vertical end of the separation ring 2. A slide 605 is fixedly connected to the other end of the metal rod 604. The slide 605 is slidably connected to the outer wall of the coil 603. Terminals 606 are installed on the outer walls of the metal rod 604 and the porcelain tube 602, respectively. Adaptive components 607 are arranged inside the slide 605 and the coil 603.

[0032] One end of an external wire 609 is wound around the outer wall of the terminal 606, and the other end of the external wire 609 is electrically connected to the magnetorheological damper 5;

[0033] Specifically, the high damping rubber bearing 3 serves as the supporting body, and together with the separation ring 2, the lower base plate and the upper base plate, provides basic support for the building. When the magnetorheological damper 5 needs to be adjusted, the current is conducted to the terminal 606 through the external line 609, and then enters the coil 603. According to the principle of electromagnetic induction, when current passes through the coil 603, a magnetic field is generated. The metal rod 604 and the slider 605 serve as part of the circuit. The slider 605 can slide on the outer wall of the coil 603 to change the number of coil turns connected to the circuit. With different numbers of connected turns, parameters such as resistance and inductance of the circuit will change, thereby affecting the electrical signal transmitted to the magnetorheological damper 5 through the external line 609. In this way, the magnetic field strength of the magnetorheological damper 5 can be accurately controlled, thereby achieving the adjustment of its stiffness. The magnetorheological intelligent variable stiffness bearing provided in this embodiment It is connected to a building. When an earthquake occurs in the connected building, the distance between the two fixed plates 601 connected at the two vertical ends of the separation ring 2 changes due to a certain displacement of the building. The slider 605 slides on the outer wall of the coil 603, which reduces the number of turns of the coil connected to the magnetorheological damper 5 and reduces the resistance in the circuit. According to Ohm's law, when the current is constant, the resistance decreases and the voltage increases. The voltage connected to the coil inside the magnetorheological damper 5 increases, and the magnetic field strength generated by the excitation coil increases, which increases the viscosity of the magnetorheological fluid inside the magnetorheological damper 5, thereby increasing the damping force of the magnetorheological damper 5, which can effectively suppress the vibration and displacement of the building. There is no need to transmit and convert circuit signals based on induction, which reduces energy consumption, ensures that energy is constantly provided to the magnetorheological damper 5, and extends the service life of the magnetorheological damper 5 during an earthquake.

[0034] The auxiliary magnetic mechanism 7 includes a fixed ring 701, which is fixedly connected to the lower surface of the upper base plate 9, and the bottom wall of the fixed ring 701 is connected to a plurality of magnetic core tubes 702. The lower surface of the upper base plate 9 is fixedly connected to one end of a support frame 703, and the other end of the support frame 703 is fixedly connected to an auxiliary coil 704. One end of the magnetic core tube 702 penetrates the auxiliary coil 704. The fixed ring 701 and the magnetic core tube 702 are internally slidably connected with a magnetic bead 705, and one end of the magnetic bead 705 is connected to a rebound component 706, which is installed inside the fixed ring 701.

[0035] The auxiliary coil 704 is electrically connected to the magnetorheological damper 5 through an auxiliary wire 712;

[0036] Specifically, during operation, when current enters the auxiliary coil 704 through the auxiliary wire 712, the auxiliary coil 704 generates a magnetic field, and the magnetic beads 705 are in the magnetic core tube 702 and are subjected to magnetic force under the action of the magnetic field; at the same time, the magnetic beads 705 are connected to the circular plate 708 in the rebound component 706 through the connecting rope 709, and the tension spring 707 exerts a pulling force on the circular plate 708. When an earthquake occurs, the magnetic beads 705 are prompted to move in the magnetic core tube 702 under the combined action of the magnetic force and the elastic force of the tension spring 707, and this movement will change the magnetic field distribution around the magnetic core tube 702, thereby affecting the magnetic field environment outside the magnetorheological damper 5. Since the performance of the magnetorheological damper 5 is related to the external magnetic field, this method can be used to assist in adjusting the magnetorheological damper 5. When the magnetic beads 705 slide into the interior of the magnetic core tube 702, multiple magnetic beads 705 form a magnetic core inside the magnetic core tube 702. At this time, the magnetic beads 705 are magnetically magnetized into magnets. Under the superposition of the magnetic field generated by the magnetic beads 705 and the original magnetic field, the vertical magnetic field generated by the auxiliary coil 704 is enhanced, and an auxiliary magnetic field is generated outside the magnetorheological damper 5, so that the viscosity and yield stress of the magnetorheological fluid inside the magnetorheological damper 5 increase, so that the damper needs to overcome greater resistance during movement, thereby further increasing the damping force, and in the case of vibration, the rebound component 706 can reset the magnetic beads 705, ensuring the reciprocating movement of the magnetic beads 705 inside the fixing ring 701 and the magnetic core tube 702, and extending the time for generating the auxiliary magnetic field, thereby avoiding the disturbance of the magnetorheological damper 5 caused by the external magnetic field disturbance caused by the earthquake, and ensuring the stability and repeatability of the system.

[0037] The steering assembly 8 includes a rotating column 801, one end of which is rotatably connected to the outer wall of the magnetorheological damper 5, and the other end of the rotating column 801 is rotatably connected to a rotating shaft 802, and the outer wall of the rotating shaft 802 is rotatably connected to a fixed seat 803, which is installed on the lower surface of the lower base plate 9 or the upper surface of the upper base plate 1.

[0038] Specifically, when the support is subjected to external force, the magnetorheological damper 5 may be displaced and rotated. The cooperation between the rotating column 801 and the rotating shaft 802 can enable the magnetorheological damper 5 to rotate flexibly within a certain range, reducing the stress concentration caused by the deformation of the high-damping rubber support 3. The fixed seat 803 provides a stable support point for the rotating shaft 802 to ensure smooth rotation. The design of this steering assembly 8 can enable the magnetorheological damper 5 to better adapt to external forces of different directions and sizes, ensuring that the support can still work normally under complex force conditions, and help protect the magnetorheological damper 5 and the entire support structure, extending its service life.

[0039] The adaption assembly 607 includes a limit frame 608, which is fixedly connected to the outer wall of the porcelain cylinder 602, and a roller 610 is rotatably connected to one side of the outer wall of the slide 605, and the roller 610 is slidably connected to the inside of the limit frame 608;

[0040] Specifically, when the slide 605 slides on the outer wall of the coil 603, the roller 610 slides in the limit frame 608. The limit frame 608 provides a limited motion trajectory for the roller 610, so that the slide 605 can only move along a specific direction, thereby ensuring the stability of the slide 605 during the sliding process and preventing the slide 605 from deviating from the normal sliding path due to vibration or other external factors. When the vibration causes the coil 603 and the slide 605 to tilt relative to each other, the number of turns of the coil 603 can still be adjusted by sliding the slide 605, thereby ensuring that the self-adjusting mechanism 6 can adjust the number of turns of the coil 603, thereby achieving precise control of the stiffness of the magnetorheological damper 5.

[0041] The rebound assembly 706 includes a tension spring 707, which is installed at both ends of the interior of the fixing ring 701, and one end of the two tension springs 707 is fixedly connected to the same circular plate 708, and the interior of the magnetic beads 705 is connected by a connecting rope 709, and one end of the connecting rope 709 is connected to the circular plate 708;

[0042] One end of a bent rod 711 is installed inside the fixing ring 701, and the other end of the bent rod 711 passes through the tension spring 707;

[0043] Specifically, under normal conditions, the tension spring 707 is in a certain tension or compression state, providing a stable elastic force for the circular plate 708. When the magnetic beads 705 move under the magnetic field generated by the auxiliary coil 704, the connecting rope 709 will pull the circular plate 708, causing the tension spring 707 to further stretch or compress. When the magnetic field disappears or changes, the elastic force of the tension spring 707 will reset the circular plate 708, driving the magnetic beads 705 back to the initial position through the connecting rope 709. The bent rod 711 can position and guide the tension spring 707, ensuring that the tension spring 707 moves in a predetermined direction during the extension and retraction process, thereby improving the reliability and stability of the rebound component 706.

[0044] Working principle: The present invention provides a magnetorheological intelligent variable stiffness bearing. When a building structure encounters an earthquake, the building structure will produce various complex deformations and vibrations. These changes will be transmitted to the bearing and trigger the coordinated work of its internal components to achieve intelligent adjustment of the bearing stiffness, thereby reducing the vibration and displacement of the building structure and ensuring the safety of the building. The details are as follows:

[0045] In the self-adjusting mechanism 6, the coil 603 wound around the outer wall of the porcelain tube 602 forms a special circuit connection with the metal rod 604, the sliding piece 605, etc., the two fixing plates 601 fix the porcelain tube 602 and the metal rod 604 respectively, the terminal 606 is installed on the metal rod 604 and the outer wall of the porcelain tube 602, and the external wire 609 connects the terminal 606 with the magnetorheological damper 5 to form a complete current conduction path;

[0046] When the building is displaced to a certain extent, the spacing between the fixed plates 601 connected to the two vertical ends of the separation ring 2 changes. The change in spacing will cause the slider 605 to slide on the outer wall of the coil 603. When the slider 605 slides, the number of turns of the coil connected to the circuit changes. According to the principle of electromagnetic induction, the number of turns of the coil is different, and the parameters such as the resistance and inductance of the circuit change accordingly. Under the condition of constant current (the output current of the controller of the magnetorheological damper 5 remains constant), the resistance decreases and the voltage increases (according to Ohm's law), thereby causing the voltage connected to the internal coil of the magnetorheological damper 5 to increase. The increase in voltage increases the magnetic field strength generated by the excitation coil, and then increases the viscosity of the magnetorheological fluid inside the magnetorheological damper 5, thereby increasing the damping force, effectively suppressing the vibration and displacement of the structure, and improving the anti-seismic and vibration reduction performance of the support. There is no need for complex induction and signal conversion, which reduces energy consumption and prolongs the service life of the magnetorheological damper 5 in earthquakes.

[0047] In the auxiliary magnetic mechanism 7, the fixing ring 701, the magnetic core tube 702, the support frame 703 and the auxiliary coil 704 constitute an auxiliary magnetic field generating system. When a current enters the auxiliary coil 704 through the auxiliary wire 712, the auxiliary coil 704 generates a magnetic field according to the principle of electromagnetic induction. At this time, the magnetic beads 705 located in the magnetic core tube 702 and connected to the rebound component 706 will be affected by the magnetic force of the magnetic field. The tension spring 707 in the rebound component 706 exerts a pulling force on the circular plate 708, and the circular plate 708 is connected to the magnetic beads 705 through the connecting rope 709.

[0048] When an earthquake occurs, the magnetic beads 705 move inside the magnetic core tube 702 under the combined action of magnetic force and the elastic force of the tension spring 707. This movement changes the magnetic field distribution around the magnetic core tube 702, thereby affecting the magnetic field environment outside the magnetorheological damper 5. When the magnetic beads 705 slide into the interior of the magnetic core tube 702, the magnetic field generated by the auxiliary coil 704 is enhanced, and an auxiliary magnetic field is generated outside the magnetorheological damper 5, which further increases the viscosity and yield stress of the magnetorheological fluid inside the magnetorheological damper 5, and further enhances the damping force.

[0049] At the same time, the rebound component 706 can reset the magnetic bead 705 under conditions of vibration, and the bent rod 711 can position and guide the tension spring 707, ensuring that the tension spring 707 moves in a predetermined direction during expansion and contraction, and ensuring that the magnetic bead 705 has reciprocating movement inside the fixed ring 701 and the magnetic core tube 702, thereby extending the time for generating the auxiliary magnetic field, avoiding the disturbance of the magnetorheological damper 5 caused by the external magnetic field disorder caused by earthquakes, and ensuring the stability and repeatability of the system.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetorheological intelligent variable stiffness bearing, comprising a lower base plate (1) and an upper base plate (9), characterized in that: A separation ring (2) is installed between the lower base plate (1) and the upper base plate (9), a high damping rubber support (3) is installed inside the separation ring (2), a return ring (4) is fixedly connected inside the separation ring (2), and the return rings (4) are evenly distributed on the circumference of the high damping rubber support (3), a magnetorheological damper (5) is arranged on the adjacent side of the outer wall of a plurality of the return rings (4), and an evenly distributed self-adjusting mechanism (6) is installed on the inner wall of the separation ring (2), an auxiliary magnetic mechanism (7) is arranged between the lower base plate (1) and the upper base plate (9), and the auxiliary magnetic mechanism (7) is arranged outside the magnetorheological damper (5), and steering assemblies (8) are respectively installed at both ends of the magnetorheological damper (5), and the steering assembly (8) is fixedly connected to the lower base plate (1) or the upper base plate (9); The auxiliary magnetic mechanism (7) comprises a fixing ring (701), the fixing ring (701) being fixedly connected to the lower surface of the upper base plate (9), the bottom wall of the fixing ring (701) being connected to a plurality of magnetic core tubes (702), the upper surface of the lower base plate (1) being fixedly connected to one end of a support frame (703), the other end of the support frame (703) being fixedly connected to an auxiliary coil (704), one end of the magnetic core tube (702) passing through the auxiliary coil (704), a magnetic bead (705) being slidably connected inside the fixing ring (701) and the magnetic core tube (702), one end of the magnetic bead (705) being connected to a rebound component (706), and the rebound component (706) being installed inside the fixing ring (701); The rebound component (706) comprises a tension spring (707), wherein the tension spring (707) is mounted at two ends inside the fixing ring (701), and one end of the two tension springs (707) is fixedly connected to the same circular plate (708); One end of a bent rod (711) is installed inside the fixing ring (701), and the other end of the bent rod (711) passes through the tension spring (707); The auxiliary coil (704) is electrically connected to the magnetorheological damper (5) via an auxiliary wire (712); the interior of the magnetic beads (705) are connected via a connecting rope (709), and one end of the connecting rope (709) is connected to the circular plate (708); When an earthquake occurs, the magnetic beads (705) move inside the magnetic core tube (702) under the combined action of the magnetic force and the elastic force of the tension spring (707). This movement changes the magnetic field distribution around the magnetic core tube (702), thereby affecting the magnetic field environment outside the magnetorheological damper (5). When the magnetic beads (705) slide into the interior of the magnetic core tube (702), the magnetic field generated by the auxiliary coil (704) is enhanced, and an auxiliary magnetic field is generated outside the magnetorheological damper (5), so that the viscosity and yield stress of the magnetorheological fluid inside the magnetorheological damper (5) are further increased, thereby preventing the magnetorheological damper (5) from vibrating. The force is further increased; at the same time, the rebound component (706) can reset the magnetic bead (705) under conditions such as vibration, and the bent rod (711) plays a positioning and guiding role on the tension spring (707), ensuring that the tension spring (707) moves along a predetermined direction during the expansion and contraction process, ensuring that the magnetic bead (705) moves reciprocatingly inside the fixing ring (701) and the magnetic core tube (702), extending the time for generating the auxiliary magnetic field, avoiding the disturbance of the external magnetic field disorder caused by earthquakes to the magnetorheological damper (5), and ensuring the stability and repeatability of the system.

2. The magnetorheological intelligent variable stiffness bearing according to claim 1, characterized in that: The self-adjusting mechanism (6) comprises a fixing plate (601), wherein two fixing plates (601) are respectively mounted at two vertical ends of the separation ring (2); a porcelain tube (602) is mounted on the outer wall of the fixing plate (601) at one vertical end of the separation ring (2); a coil (603) is wound around the outer wall of the porcelain tube (602); one end of a metal rod (604) is mounted on the outer wall of the fixing plate (601) at the other vertical end of the separation ring (2); a sliding plate (605) is fixedly connected to the other end of the metal rod (604); the sliding plate (605) is slidably connected to the outer wall of the coil (603); the outer walls of the metal rod (604) and the porcelain tube (602) are respectively mounted with terminal posts (606); and an adaption component (607) is arranged inside the sliding plate (605) and the coil (603).

3. The magnetorheological intelligent variable stiffness bearing according to claim 1, characterized in that: The steering assembly (8) comprises a rotating column (801), one end of the rotating column (801) being rotatably connected to the outer wall of the magnetorheological damper (5), the other end of the rotating column (801) being rotatably connected to a rotating shaft (802), the outer wall of the rotating shaft (802) being rotatably connected to a fixing seat (803), and the fixing seat (803) being mounted on the lower surface of the upper base plate (9) or the upper surface of the lower base plate (1).

4. The magnetorheological intelligent variable stiffness bearing according to claim 2, characterized in that: The adaptable component (607) comprises a limit frame (608), wherein the limit frame (608) is fixedly connected to the outer wall of the porcelain cylinder (602), and a roller (610) is rotatably connected to one side of the outer wall of the sliding plate (605), and the roller (610) is slidably connected to the inside of the limit frame (608).

5. The magnetorheological intelligent variable stiffness bearing according to claim 2, characterized in that: One end of an external wire (609) is wound around the outer wall of the terminal (606), and the other end of the external wire (609) is electrically connected to the magnetorheological damper (5).

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