Self-adaptive nonlinear three-dimensional vibration isolation support

Abstract

The invention belongs to the technical field of civil engineering damping energy dissipation and vibration reduction, and particularly discloses a self-adaptive nonlinear three-dimensional vibration isolation support which comprises a first support plate and a second support plate located under the first support plate, and a tuning liquid damping mechanism is arranged at the bottom of the first support plate. First magnets are fixedly arranged on the two opposite side faces or the periphery of the tuning liquid damping mechanism, vertical vibration reduction mechanisms are correspondingly and symmetrically arranged between the first support plate and the second support plate and located in the circumferential direction of the tuning liquid damping mechanism, and second magnets are installed on the sides, close to the first magnets, of the vertical vibration reduction mechanisms. And a first electromagnetic coil is arranged between the first magnet and the second magnet, and is connected with a power generation mechanism fixedly arranged on the upper surface of the second support plate to form a closed loop. According to the frequency band and direction of external vibration, the non-linear coupling effect of various energy consumption mechanisms can be coordinated, self-adaptive vibration reduction is achieved, and the self-adaptive vibration reduction device is particularly suitable for the vibration isolation requirement under the complex vibration environment such as subway upper cover buildings and precision equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of damping energy dissipation and vibration reduction in civil engineering, and in particular relates to an adaptive nonlinear three-dimensional vibration isolation support. Background Art

[0002] As we all know, building vibration isolation technology is an important means to reduce the impact of environmental vibration on buildings. At present, building vibration isolation technology is mainly aimed at subway environmental vibration. Generally, linear vibration isolation devices such as rubber bearings and spring dampers are used to transfer vibration energy to the ground to reduce the vibration response of the building. However, this type of technology has the following limitations:

[0003] First, the earthquake protection capability is insufficient: the existing vibration isolation devices are mostly designed based on subway vibration (frequency 10Hz ~ 50Hz), and the vibration isolation performance of earthquake effects (low frequency 0.1Hz ~ 10Hz) is insufficient. The long-period characteristics of earthquake waves can easily cause structural resonance, and traditional linear systems are difficult to take into account the composite vibration isolation requirements of high-frequency subway vibration and low-frequency earthquakes.

[0004] The second is the inherent contradiction of linear design: the vibration isolation frequency band of the linear vibration isolation system is negatively correlated with stiffness. Reducing stiffness can broaden the low-frequency vibration isolation range, but it will increase the static displacement of the structure and affect safety; while increasing stiffness will narrow the vibration isolation frequency band, making it difficult to isolate high-frequency vibration. This contradiction limits the application of linear systems in complex vibration environments.

[0005] Third, composite vibration isolation technology is immature: research on vibration isolation under the coupling of subway vibration and earthquake is still in its infancy. Although the existing three-dimensional vibration isolation system (such as thick rubber bearings) can partially achieve multi-dimensional vibration isolation, it lacks a nonlinear control mechanism and cannot dynamically adapt to the energy dissipation requirements of vibrations of different frequencies.

[0006] Fourth, the effectiveness of nonlinear mechanisms is limited: the quasi-zero stiffness isolators developed in recent years reduce the natural frequency of the system through negative stiffness mechanisms, but there is a problem of reduced bearing capacity. Existing nonlinear designs mostly rely on a single energy dissipation mechanism (such as friction and magnetorheological damping), and fail to effectively integrate multiple nonlinear effects such as magnetic negative stiffness, eddy current energy dissipation, and tuned liquid damping, which limits the vibration isolation bandwidth and energy dissipation efficiency.

[0007] Fifth, there is a contradiction between self-reset and safety: traditional vibration isolation devices are prone to residual deformation after strong vibration, requiring additional reset mechanisms. Increasing the reset stiffness will increase the system stiffness and deteriorate the high-frequency vibration isolation performance. How to balance the self-reset capability and dynamic stiffness in nonlinear design is still a difficult problem.

[0008] In summary, the existing vibration isolation devices have significant deficiencies in terms of vibration isolation bandwidth, energy dissipation efficiency and safety in complex vibration environments. It is urgent to develop new vibration isolation devices that have nonlinear control, multi-band vibration isolation and self-resetting capabilities.

[0009] In view of this, this invention is proposed. Summary of the invention

[0010] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an adaptive nonlinear three-dimensional vibration isolation bearing, which is mainly used to solve the problems of insufficient vibration isolation bandwidth, low energy dissipation efficiency and poor safety (such as insufficient earthquake protection capability, inherent contradictions in linear design, immature composite vibration isolation technology, limited effectiveness of nonlinear mechanism, contradiction between self-reset and safety, etc.) of existing vibration isolation devices in a composite vibration environment (such as the coupling of subway vibration and earthquake).

[0011] The purpose of the present invention is to be solved by the following technical solutions:

[0012] The present invention provides an adaptive nonlinear three-dimensional vibration isolation support, comprising a first support plate and a second support plate located directly below the first support plate, a tuning liquid damping mechanism is suspended at the bottom of the first support plate, and first magnets are fixedly arranged on the four side surfaces or two opposite side surfaces of the tuning liquid damping mechanism, and correspondingly, multiple groups of vertical vibration reduction mechanisms are symmetrically arranged between the first support plate and the second support plate and located in the circumferential direction of the tuning liquid damping mechanism, a second magnet is installed on the side of the vertical vibration reduction mechanism close to the first magnet, and a first electromagnetic coil is arranged between the first magnet and the second magnet, and the first electromagnetic coil is electrically connected to a power generation mechanism fixedly arranged on the upper surface of the second support plate to form a closed loop.

[0013] Furthermore, the tuned liquid damping mechanism includes a damping shell and a viscous liquid filled in the damping shell, the first magnet is fixedly mounted on four side surfaces or two opposite side surfaces of the damping shell, and the damping shell is linked to a fixed pulley arranged at the bottom of the first support plate through a rigid rope.

[0014] Furthermore, the tuned liquid damping mechanism also includes an iron block arranged in the damping shell, and the iron block moves in the viscous liquid to generate viscous resistance for energy dissipation and vibration reduction. At the same time, a second electromagnetic coil is arranged in the first support plate and directly above the iron block. The second electromagnetic coil is connected in series with the first electromagnetic coil to cause eddy currents in the iron block for energy dissipation and vibration reduction.

[0015] Furthermore, the viscous liquid is high-viscosity silicone oil.

[0016] Furthermore, the power generation mechanism includes a support block fixedly arranged on the second support plate and located below the tuned liquid damping mechanism, a carrying plate is fixedly installed directly above the support block, and a first piezoelectric sheet is fixedly arranged on the four side surfaces or two opposite side surfaces of the support block, and an iron pendulum cone that cooperates with the first piezoelectric sheet to generate electricity is correspondingly suspended circumferentially on the carrying plate, and the first piezoelectric sheet forms a closed loop with the first electromagnetic coil through electric wires.

[0017] Furthermore, the power generation mechanism also includes an iron ring located below the supporting plate and connected to the supporting plate through a first elastic member. The iron ring generates electricity by cooperating with a second piezoelectric sheet arranged on the top of the supporting block. The second piezoelectric sheet is connected to the first electromagnetic coil through an electric wire, so as to cause the iron pendulum cone to be subjected to horizontal vibration and impact on the first piezoelectric sheet and / or the iron ring to be subjected to vertical vibration and impact on the second piezoelectric sheet to generate current, which is transmitted to the first electromagnetic coil through the electric wire.

[0018] Furthermore, the vertical vibration reduction mechanism includes two cylinders arranged vertically side by side, a closed slide is provided between the two cylinders, the piston end of each cylinder is fixedly connected to the second support plate, and a return spring is provided on the piston, and the cylinder end of each cylinder is elastically connected to the first support plate through a second elastic member.

[0019] Furthermore, the vertical vibration reduction mechanism also includes a U-shaped plate movably arranged on the upper part of the slide. In the natural state, the top of the U-shaped plate is higher than the cylinder, and a gap is reserved between the bottom of the U-shaped plate and the buckles arranged on the inner sides of the two cylinders; in the vertical vibration state, the U-shaped plate is squeezed by the first support plate, so that the U-shaped plate and the buckle consume energy by friction, while closing the two cylinders.

[0020] Furthermore, the vertical vibration reduction mechanism also includes a plurality of third magnets arranged in the slideway, the plurality of third magnets are all located below the buckle, the magnetic poles of adjacent third magnets are in opposite directions, and the third magnet located at the upper end is fixedly connected to the U-shaped plate through a non-magnetic connecting rod.

[0021] Furthermore, the first support plate and the second support plate are both made of rubber.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The three-dimensional vibration isolation support provided by the present invention is mainly composed of a first support plate, a second support plate, and a tuning liquid damping mechanism, a power generation mechanism, a vertical vibration reduction mechanism, and electromagnetic coils connected in series therebetween. Through the coordinated cooperation of the above mechanisms, adaptive nonlinear response adjustment can be performed for vibrations in different frequency bands (such as subway vibration frequency, earthquake vibration frequency) and different directions (such as horizontal direction, vertical direction). In addition, the three-dimensional vibration isolation support also has the following advantages:

[0024] First, the vibration reduction efficiency is improved through a variety of energy dissipation mechanisms. In the vertical vibration reduction mechanism, the second elastic member between the cylinder and the first support plate, the friction energy consumption of the U-shaped plate and the buckle, the interaction between the third magnet, and the piston at the bottom of the cylinder can all consume vibration energy; in the tuned liquid damping mechanism, the energy consumption of the viscous liquid and the eddy current energy of the iron block; in the power generation mechanism, the electric energy generated by the iron pendulum cone hitting the first piezoelectric plate and / or the iron ring hitting the second piezoelectric plate can be transmitted to the first electromagnetic coil, and energy is consumed by generating a magnetic field. That is, the present invention uses a variety of means to effectively improve the energy dissipation efficiency and make up for the defect of low vibration reduction efficiency of existing vibration isolation devices.

[0025] Second, it has nonlinear control capability: the setting of the first electromagnetic coil between the first magnet and the second magnet and the power generation mechanism enables the vibration isolation support to dynamically adjust nonlinear effects such as magnetic negative stiffness according to the vibration conditions, thereby realizing nonlinear control and being able to dynamically adapt to the energy dissipation requirements of vibrations of different frequencies. This overcomes the problem of the lack of nonlinear control mechanism in existing three-dimensional vibration isolation systems, improves the deficiency of existing nonlinear designs that rely heavily on a single energy consumption mechanism, and improves the vibration isolation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the adaptive nonlinear three-dimensional vibration isolation support of the present invention;

[0029] Figure 2 It is a schematic diagram of a tuned liquid damping mechanism in an adaptive nonlinear three-dimensional vibration isolation support of the present invention;

[0030] Figure 3 It is a schematic diagram of the power generation mechanism in the adaptive nonlinear three-dimensional vibration isolation support of the present invention;

[0031] Figure 4 It is a schematic diagram of the vertical vibration reduction mechanism in the adaptive nonlinear three-dimensional vibration isolation support of the present invention.

[0032] in:

[0033] 1 is the first support plate;

[0034] 2 is the second support plate;

[0035] 3 is a tuning liquid damping mechanism; 31 is a first magnet; 32 is a damping shell; 33 is a viscous liquid; 34 is a rigid rope; 35 is a fixed pulley; 36 is an iron block;

[0036] 4 is a vertical vibration reduction mechanism; 41 is a cylinder; 42 is a return spring; 43 is a second elastic member; 44 is a U-shaped plate; 45 is a buckle; 46 is a third magnet;

[0037] 5 is a second magnet;

[0038] 6 is a first electromagnetic coil;

[0039] 7 is a power generation mechanism; 71 is a support block; 72 is a bearing plate; 73 is a first piezoelectric sheet; 74 is an iron pendulum cone; 75 is a first elastic member; 76 is an iron ring; 77 is a second piezoelectric sheet;

[0040] 8 is the second electromagnetic coil. DETAILED DESCRIPTION

[0041] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Example 1

[0044] See also Figures 1 to 4The present invention provides an adaptive nonlinear three-dimensional vibration isolation support, which is mainly used for the vibration isolation requirements of subway roof buildings, precision equipment and other complex vibration environments. It can effectively meet the vibration isolation requirements in such scenarios and improve the stability and safety of the above structure in complex vibration environments. The three-dimensional vibration isolation support includes a first support plate 1 and a second support plate 2 located directly below it. A tuning liquid damping mechanism 3 is suspended at the middle position of the bottom of the first support plate 1. The left and right sides of the tuning liquid damping mechanism 3 are fixedly provided with a first magnet 31. Correspondingly, between the first support plate 1 and the second support plate 2, and on the left and right sides of the tuning liquid damping mechanism 3, multiple groups (at least one group on each side) of vertical vibration reduction mechanisms 4 are symmetrically arranged at intervals. Second magnets 5 are installed on the inner side of the vertical vibration reduction mechanisms 4 close to the first magnets 31, and first electromagnetic coils 6 are arranged between the first magnets 31 and the second magnets 5. The left and right groups of first electromagnetic coils 6 are electrically connected to the power generation mechanism 7 fixedly provided on the upper surface of the second support plate 2 through wires, thereby forming a closed loop.

[0045] Specifically, in the embodiment of the present invention, the tuned liquid damping mechanism 3 includes a damping shell 32 and a viscous liquid 33 filled in the damping shell 32. In a preferred embodiment, the viscous liquid 33 is made of high-viscosity silicone oil, and an air buffer layer is reserved on the top of the damping shell 32 during filling. This arrangement ensures the liquid damping effect and avoids liquid-solid coupling resonance. The first magnet 31 can be fixedly mounted on the left and right side surfaces of the damping shell 32 by a high-strength adhesive, and the top of the damping shell 32 forms a linkage suspension structure with a fixed pulley 35 arranged at the bottom of the first support plate 1 through a rigid rope 34 (such as a steel wire rope), as shown in FIG. Figure 2 As shown, the three-dimensional spatial movement freedom of the tuning liquid damping mechanism 3 is realized.

[0046] Furthermore, the tuned liquid damping mechanism 3 of the present invention also includes an iron block 36 disposed in the damping shell 32, and the iron block 36 moves in the viscous liquid 33 to generate viscous resistance for primary energy dissipation and vibration reduction. At the same time, a second electromagnetic coil 8 is disposed in the first support plate 1 and directly above the iron block 36, and the second electromagnetic coil 8 is connected in series with the first electromagnetic coils 6 on both sides through wires. When vibration occurs, the iron block 36 reciprocates in the viscous liquid 33 and passes through the magnetic field area of ​​the second electromagnetic coil 8, and the eddy current effect can be generated inside the iron block 36 by utilizing the principle of electromagnetic induction, thereby forming a secondary energy dissipation and vibration reduction effect. This dual energy dissipation design significantly improves the energy dissipation efficiency, and at the same time enhances the nonlinear stiffness characteristics of the three-dimensional vibration isolation support through the coupling effect of the electromagnetic coil.

[0047] In the embodiment of the present invention, the specific structure of the power generation mechanism 7 is as follows: Figure 3As shown, it includes a support block 71 fixedly arranged on the second support plate 2 and located below the tuning liquid damping mechanism 3, a bearing plate 72 is fixedly installed directly above the support block 71, a group of first piezoelectric sheets 73 are fixedly embedded on both sides of the support block 71, and an iron pendulum cone 74 is suspended on both sides of the bearing plate 72 at the corresponding position through a flexible steel wire rope. When horizontal vibration occurs, the iron pendulum cone 74 swings back and forth under the action of inertia, and its tip periodically collides with the first piezoelectric sheet 73, and the piezoelectric effect is used to convert mechanical vibration energy into electrical energy. At the same time, since the two groups of first piezoelectric sheets 73 are electrically connected to the first electromagnetic coils 6 on both sides through wires, the current generated by the collision of the iron pendulum cone 74 with the first piezoelectric sheets 73 is transmitted to the first electromagnetic coil 6 through the wires. After the first electromagnetic coil 6 is electromagnetized, it forms a nonlinear damping of three magnets with the first magnets 31, the iron block 36 and the second magnet 5 on both sides. The magnitude of the damping force is used to control the amplitude of the left and right swing of the damping shell 32 connected by the fixed pulley 35 and the rigid rope 34 in the middle, forming a complete energy recovery closed loop. This design not only realizes the effective recovery and utilization of vibration energy, but also enhances the dynamic response characteristics of the system through the nonlinear motion characteristics of the iron pendulum cone 74.

[0048] Furthermore, the power generation mechanism 7 of the present invention also includes an iron ring 76 located below the support plate 72 and connected to the support plate 72 through a first elastic member 75 (such as a spring). The iron ring 76 and the second piezoelectric sheet 77 on the top of the support block 71 form a vertical vibration response structure. When vertical vibration occurs, the iron ring 76 generates reciprocating motion through the first elastic member 75 under the action of inertia, and the bottom of the iron ring 76 periodically collides with the second piezoelectric sheet 77 to generate electrical energy (the power generation principle is the same as the principle of the iron pendulum cone 74 colliding with the first piezoelectric sheet 73). The second piezoelectric sheet 77 is electrically connected to the first electromagnetic coil 6 on both sides through wires, and the horizontal vibration power generation system formed by the iron pendulum cone 74 colliding with the first piezoelectric sheet 73 together constitutes an energy recovery network. This composite power generation design can respond to vibration excitation in the horizontal and / or vertical directions respectively, and significantly improve the energy recovery efficiency through the coordinated work of multiple groups of piezoelectric sheets. After the generated electric energy is transmitted to the first electromagnetic coil 6 through a closed loop, a controllable electromagnetic damping field is formed between the first magnet 31, the second magnet 5 and the magnetic conductive block 36. By adjusting the magnetic field strength, active control of the swing amplitude of the tuned liquid damping mechanism 3 is achieved, and finally a nonlinear vibration isolation system with both passive vibration isolation and active control characteristics is formed. In addition, after the generated current passes through the first electromagnetic coil 6, it continues to flow through the second electromagnetic coil 8, and the second electromagnetic coil 8 causes the iron block 36 to generate eddy current phenomenon to consume energy, thereby achieving a further shock absorption effect.

[0049] like Figure 4As shown, the vertical vibration reduction mechanism 4 in the embodiment of the present invention includes two cylinders 41 arranged vertically side by side, and a specific spacing is formed between the cylinder bodies of the two cylinders 41 to reserve space for the subsequent installation of other energy-consuming structures. The piston end at the bottom of each cylinder 41 is fixedly connected to the second support plate 2, and a return spring 42 is sleeved on the outer periphery of the piston, and the return spring 42 provides a stable linear restoring force within the full stroke range of the piston; at the same time, the cylinder end at the top of each cylinder 41 is elastically connected to the first support plate 1 through a second elastic member 43 (such as a spring), forming a double-spring composite vibration reduction system. In addition, the second magnet 5 is fixedly installed on the inner side wall of the cylinder of each cylinder 41 close to the side of the tuned liquid damping mechanism 3, and is used to form a horizontal magnetic circuit coupling with the first magnet 31 of the tuned liquid damping mechanism 3. Through the above arrangement, the vertical vibration reduction mechanism 4 has the triple characteristics of air pressure damping, spring stiffness adjustment and electromagnetic coupling damping, and can realize the coordinated dissipation of multi-directional vibration energy in three-dimensional space.

[0050] Furthermore, the present invention provides a slideway with a closed bottom between the cylinder bodies of the two cylinders 41, and a U-shaped plate 44 is movably installed on the upper part of the slideway. In the natural state, the top of the U-shaped plate 44 is higher than the top of the cylinder 41, and a gap is reserved between the bottom of the U-shaped plate 44 and the buckle 45 provided on the inner side of the two cylinders 41; when in a vertical vibration state, the first support plate 1 will exert an extrusion effect on the U-shaped plate 44, and at this time the U-shaped plate 44 will move downward along the closed slideway to interact with the buckle 45, and energy consumption will be achieved through the friction between the two. Preferably, the U-shaped plate 44 and the buckle 45 are connected by plugging. At the same time, when the U-shaped plate 44 and the buckle 45 are combined, the left and right cylinders 41 will be completely closed. At this time, the piston at the bottom of the cylinder 41 moves upward, and the restoring force of the compressed air in the cylinder 41 provides elastic force to achieve energy consumption and vibration reduction effects.

[0051] It should be noted that the vertical vibration reduction mechanism 4 of the present invention also includes three third magnets 46 arranged in the slideway. The three third magnets 46 are all located below the buckle 45, and the magnetic poles of any adjacent third magnets 46 are in opposite directions. The third magnet 46 located at the top is fixedly connected to the U-shaped plate 44 through a non-magnetic connecting rod. Through the above arrangement, when the vertical vibration reduction mechanism 4 is in working state, as the U-shaped plate 44 moves in the slideway, the third magnet 46 fixedly connected to the U-shaped plate 44 will also move accordingly. Since the magnetic poles of the adjacent third magnets 46 are in opposite directions, the moving third magnet 46 will generate an interactive damping force with the other two third magnets 46. This damping force forms a magnetic negative stiffness effect, which enables the vertical vibration reduction mechanism 4 to further consume vibration energy, thereby enhancing the shock absorption effect of the entire vibration isolation support and effectively improving the stability and safety in a complex vibration environment.

[0052] The working process of the adaptive nonlinear three-dimensional vibration isolation support provided by the present invention is as follows:

[0053] Situation 1: When vertical vibration occurs, the three-dimensional vibration isolation support is subjected to vertical downward vibration as an example, as follows:

[0054] First, the first support plate 1 moves downward under the force, and the second elastic member 43 elastically connected to it is compressed to dissipate energy and reduce vibration; then, the first support plate 1 continues to move downward and pushes the U-shaped plate 44 to move downward, resulting in the following two effects: on the one hand, the third magnet 46 fixedly connected to the lower end of the U-shaped plate 44 and other third magnets 46 generate a damping force to achieve negative magnetic stiffness, further consuming energy and reducing vibration; on the other hand, the U-shaped plate 44 gradually undergoes downward thrust, and its bottom end and the buckle 45 dissipate energy by friction, while closing the two cylinders 41; finally, when the vertical downward vibration is strong (the above structure has not completely offset the vibration energy), the first support plate 1, the second elastic member 43, the U-shaped plate 44 and the cylinder bodies of the two cylinders 41 form an overall downward pressure movement. At this time, the piston moves upward to offset the energy, and the restoring force of the compressed air in the cylinder 41 provides elastic force to dissipate energy and reduce vibration. In addition, when the first support plate 1 moves downward, the iron block 36 in the tuned liquid damping mechanism 3 moves upward relative to the damping shell 32 under the action of inertial force, and dissipates energy and reduces vibration through the viscous resistance brought by the viscous liquid 33; at the same time, the iron ring 76 in the power generation mechanism 7 will hit the second piezoelectric plate 77 under the action of inertial force, and the generated current flows through the first electromagnetic coil 6. At this time, a magnetic field is generated around the first electromagnetic coil 6 and forms a nonlinear damping of three magnets with the first magnet 31, the iron block 36 and the second magnet 5 on both sides to dissipate energy. Then the current flows through the second electromagnetic coil 8, and the magnetic field generated by the second electromagnetic coil 8 will cause eddy current energy to be generated inside the iron block 36 in the damping shell 32.

[0055] When the vertical downward vibration disappears, the second elastic member 43 stretches to drive the first support plate 1 to achieve self-reset, and the magnetic force between the third magnets 46 pushes the U-shaped plate 44 and the buckle 45 to separate and return to the initial equilibrium position. At the same time, the cylinders 41 on the left and right sides are no longer sealed, and the reset spring 42 set on the circumference of the piston helps the piston to reset. At the same time, the iron block 36 and the iron ring 76 gradually return to their initial positions.

[0056] Situation 2: When horizontal vibration occurs, take the three-dimensional vibration isolation support receiving vibration from left to right as an example to explain as follows:

[0057] First, under the action of inertial force, the power generation mechanism 7 fixed on the second support plate 2, the iron pendulum cone 74 suspended on the bearing plate 72 will hit the first piezoelectric sheet 73, converting mechanical energy into electrical energy, and at the same time consuming energy and reducing vibration. The converted electrical energy is transmitted to the first electromagnetic coil 6 through the wire. The first electromagnetic coil 6 generates a magnetic field and forms a nonlinear damping of three magnets with the first magnet 31, the second magnet 5 and the iron block 36 on both sides. The damping force generated by it controls the amplitude of the overall swing of the tuning liquid damping mechanism 3, and the swing is consumed and reduced by the damping force of the nonlinear damping formed by the three magnets. In other words, when the vibration is small, the current generated by the first piezoelectric sheet 73 is small, the magnetic field generated by the first electromagnetic coil 6 is small, and the damping force on the slight swing of the tuning liquid damping mechanism 3 is also small. On the contrary, it is the opposite. In addition, after the current passes through the first electromagnetic coil 6, it flows through the second electromagnetic coil 8. The second electromagnetic coil 8 causes the iron block 36 to generate eddy current phenomenon to consume energy, thereby achieving further shock reduction.

[0058] In case three, when both vertical vibration and horizontal vibration occur, the above two cases will respond at the same time, which will not be described in detail.

[0059] Example 2

[0060] The core improvement of this embodiment over the first embodiment is to construct an omnidirectional three-dimensional vibration reduction system, and the specific technical solution is as follows:

[0061] Compared with the left-right symmetrical structure of Example 1, this embodiment adds a vertical vibration reduction mechanism 4, a second magnet 5 and a first electromagnetic coil 6 in the front and rear directions of the tuned liquid damping mechanism 3, respectively, to form a four-way symmetrical vibration isolation layout. At the same time, first magnets 31 are arranged around the damping shell 32 in the tuned liquid damping mechanism 3, and a first electromagnetic coil 6 is arranged between each first magnet 31 and the second magnet 5, forming a magnetic circuit coupling system in four directions. When the structure vibrates horizontally in any direction, the first electromagnetic coils 6 in four directions synchronously cut the magnetic field, and generate multi-directional electromagnetic damping force through the eddy current effect, which significantly improves the omnidirectional vibration isolation performance of the system.

[0062] In addition, four groups of iron pendulum cones 74 are suspended around the supporting plate 72 of the power generation mechanism 7 by flexible steel wire ropes, and the four sides of the support block 71 at the corresponding position are embedded and installed with the first piezoelectric sheet 73. When the structure vibrates horizontally in any direction, the iron pendulum cone 74 in the corresponding direction hits the corresponding piezoelectric sheet under the action of inertia, converting the vibration energy into electrical energy. The four groups of first piezoelectric sheets 73 are connected in parallel with the first electromagnetic coils 6 in four directions, which not only realizes 360° omnidirectional vibration energy recovery, but also enhances the nonlinear stiffness characteristics of the system through the synergistic effect of multiple groups of electromagnetic coils, so that the vibration isolation support has a stronger dynamic response capability in a complex vibration environment.

[0063] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0064] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An adaptive nonlinear three-dimensional vibration isolation support, characterized in that: The invention comprises a first support plate (1) and a second support plate (2) located directly below the first support plate (1); a tuning liquid damping mechanism (3) is suspended at the bottom of the first support plate (1); first magnets (31) are fixedly arranged on four side surfaces or two opposite side surfaces of the tuning liquid damping mechanism (3); and correspondingly, a plurality of groups of vertical vibration reduction mechanisms (4) are symmetrically arranged between the first support plate (1) and the second support plate (2) and in the circumferential direction of the tuning liquid damping mechanism (3); a second magnet (5) is installed on one side of the vertical vibration reduction mechanism (4) close to the first magnet (31); and a first electromagnetic coil (6) is arranged between the first magnet (31) and the second magnet (5); the first electromagnetic coil (6) is electrically connected to a power generation mechanism (7) fixedly arranged on the upper surface of the second support plate (2) to form a closed circuit.

2. The adaptive nonlinear three-dimensional vibration isolation support according to claim 1, characterized in that: The tuned liquid damping mechanism (3) comprises a damping shell (32) and a viscous liquid (33) filled in the damping shell (32); the first magnet (31) is fixedly mounted on four side surfaces or two opposite side surfaces of the damping shell (32); and the damping shell (32) is linked to a fixed pulley (35) arranged at the bottom of the first support plate (1) via a rigid rope (34).

3. The adaptive nonlinear three-dimensional vibration isolation support according to claim 2, characterized in that: The tuned liquid damping mechanism (3) also includes an iron block (36) arranged in the damping shell (32), wherein the iron block (36) moves in the viscous liquid (33) to generate viscous resistance for energy dissipation and vibration reduction. At the same time, a second electromagnetic coil (8) is arranged in the first support plate (1) and directly above the iron block (36), and the second electromagnetic coil (8) is connected in series with the first electromagnetic coil (6) to cause the iron block (36) to generate eddy current for energy dissipation and vibration reduction.

4. The adaptive nonlinear three-dimensional vibration isolation support according to claim 2, characterized in that: The viscous liquid (33) is high-viscosity silicone oil.

5. The adaptive nonlinear three-dimensional vibration isolation support according to claim 1, characterized in that: The power generation mechanism (7) comprises a support block (71) fixedly arranged on the second support plate (2) and located below the tuned liquid damping mechanism (3); a carrier plate (72) is fixedly installed directly above the support block (71); a first piezoelectric sheet (73) is fixedly arranged on the four side surfaces or two opposite side surfaces of the support block (71); an iron pendulum cone (74) is correspondingly suspended circumferentially of the carrier plate (72) for generating electricity in cooperation with the first piezoelectric sheet (73); the first piezoelectric sheet (73) forms a closed loop with a first electromagnetic coil (6) via an electric wire.

6. The adaptive nonlinear three-dimensional vibration isolation support according to claim 5, characterized in that: The power generation mechanism (7) also includes an iron ring (76) located below the support plate (72) and connected to the support plate (72) via a first elastic member (75); the iron ring (76) generates electricity by cooperating with a second piezoelectric sheet (77) arranged on the top of the support block (71); the second piezoelectric sheet (77) is connected to the first electromagnetic coil (6) via an electric wire, so as to cause the iron pendulum cone (74) to be subjected to horizontal vibration and impact on the first piezoelectric sheet (73) and / or the iron ring (76) to be subjected to vertical vibration and impact on the second piezoelectric sheet (77), thereby generating current which is transmitted to the first electromagnetic coil (6) via the electric wire.

7. The adaptive nonlinear three-dimensional vibration isolation support according to claim 1, characterized in that: The vertical vibration reduction mechanism (4) comprises two cylinders (41) arranged vertically side by side, a closed slideway is arranged between the two cylinders (41), the piston end of each cylinder (41) is fixedly connected to the second support plate (2), and a return spring (42) is sleeved on the piston, and the cylinder end of each cylinder (41) is elastically connected to the first support plate (1) via a second elastic member (43).

8. The adaptive nonlinear three-dimensional vibration isolation support according to claim 7, characterized in that: The vertical vibration reduction mechanism (4) also includes a U-shaped plate (44) movably arranged on the upper part of the slideway. In a natural state, the top of the U-shaped plate (44) is higher than the cylinder (41), and a gap is reserved between the bottom of the U-shaped plate (44) and the buckles (45) arranged on the inner sides of the two cylinders (41). In a vertical vibration state, the U-shaped plate (44) is squeezed by the first support plate (1), so that the U-shaped plate (44) and the buckle (45) consume friction energy, while closing the two cylinders (41).

9. The adaptive nonlinear three-dimensional vibration isolation support according to claim 7, characterized in that: The vertical vibration reduction mechanism (4) further comprises a plurality of third magnets (46) arranged in the slideway, wherein the plurality of third magnets (46) are all located below the buckle (45), the magnetic poles of adjacent third magnets (46) are in opposite directions, and the third magnet (46) located at the upper end is fixedly connected to the U-shaped plate (44) via a non-magnetic connecting rod.

10. The adaptive nonlinear three-dimensional vibration isolation support according to any one of claims 1 to 9, characterized in that: The first support plate (1) and the second support plate (2) are both made of rubber.

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