Self-energized nonlinear energy trap multidirectional damping device

Abstract

The invention discloses a self-energized nonlinear energy trap multidirectional damping device, relates to the technical field of structural vibration control, and aims to solve the problems that a traditional damping device is narrow in frequency range, depends on external energy, is inflexible in damping adjustment and is single in damping direction. The device comprises a sealing shell, a tumbler mass block, nine linear springs, a double-track system, a piezoelectric power generation system, an eddy current damping system and a control circuit. The core of the device is that broadband vibration energy is captured through nonlinear cooperation of the tumbler mass block and the hemispherical curved surface track, the broadband vibration energy is converted into electric energy through the piezoelectric power generation system and the control circuit to be self-powered, and the vibration energy is efficiently dissipated through an eddy current damping system, a mechanical switch adjustment magnetic field and track sliding friction. The device does not need an external power supply, adapts to multi-scene vibration suppression, realizes multi-directional vibration suppression through double-track cooperation, is high in vibration reduction efficiency and high in adaptability, breaks through the frequency limitation of a traditional linear vibration reduction device, can effectively capture broadband vibration energy, and does not need to be independently designed for a single frequency.

Description

Technical Field

[0001] This invention relates to the field of structural vibration control technology, and in particular to a self-powered nonlinear energy trap multi-directional vibration reduction device, which is suitable for multi-directional vibration suppression in industrial equipment, precision instrument platforms, bridge monitoring equipment or household appliances. Background Technology

[0002] Vibration problems are prevalent in industrial production, household appliances, and infrastructure. Examples include low-frequency vibrations during the spin cycle of household washing machines, high-frequency vibrations in small and medium-sized industrial motors, and micro-vibrations in the structures of monitoring equipment. These vibrations not only generate noise and affect the stability of equipment operation but may also shorten equipment lifespan and even pose structural safety hazards. Therefore, vibration damping devices have become key components in these fields. However, existing vibration damping devices have significant technical limitations: Most traditional damping systems employ linear structural designs with narrow frequency response ranges, capable of suppressing vibrations at specific frequencies only. They cannot adapt to wide-frequency vibration scenarios, such as the change in vibration frequency when equipment operates from low speed to high speed. Traditional damping systems (such as hydraulic damping and rubber damping) often rely on external power sources for adjustment or have no adjustment function at all. When the vibration intensity changes, they cannot flexibly adjust the damping force, resulting in either insufficient vibration reduction or excessive energy consumption. Moreover, traditional damping systems can only suppress vibrations in a single direction and cannot suppress vibrations in multiple directions (three dimensions), resulting in poor directional adaptability.

[0003] In view of the shortcomings of the existing technologies, there is an urgent need for a multi-directional vibration damping device that can achieve wide-band vibration reduction, self-powered and with adjustable damping, so as to meet the vibration suppression requirements in different scenarios, while reducing dependence on external energy and improving energy utilization efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a self-powered nonlinear energy trap multidirectional vibration damping device, which solves the technical problems of traditional vibration damping devices, such as narrow frequency range, reliance on external energy, inflexible damping adjustment, poor directional adaptability, and difficulty in meeting the wide-frequency vibration suppression requirements of various scenarios.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A self-powered nonlinear energy trap multi-directional vibration reduction device includes a sealed shell, a roly-poly mass block, nine linear springs, a dual-track system, a piezoelectric power generation system, an eddy current damping system, and a control circuit. The sealed housing includes an outer shell, a top cover, and an anti-slip rubber base. The top cover is connected to the top of the outer shell, and the anti-slip rubber base is 3mm thick and located at the bottom of the outer shell. The roly-poly mass block consists of an upper ellipsoidal plate and a lower hemisphere, and the roly-poly mass block can roll along a hemispherical curved track. The nine linear springs include five 25mm long linear springs and four 50mm long linear springs that are symmetrically distributed. The nine linear springs are fixedly connected between the outer shell and the hemispherical curved track by a fixed spring sleeve. The dual-track system includes a hemispherical curved track, a concave sliding track, and a convex slider. The hemispherical curved track is located inside the outer shell, the concave sliding track is located inside the outer shell and connected to the bottom of the outer shell, and the convex slider is symmetrically distributed around the hemispherical curved track. The convex slider can slide on the concave sliding track. The eddy current damping system includes a permanent magnet, an electromagnetic coil, and a mechanical switch. The permanent magnet and the electromagnetic coil work together to form a mixed magnetic field, and the mechanical switch is electrically connected to the supercapacitor and the electromagnetic coil. The piezoelectric power generation system includes a polyvinylidene fluoride (PVDF) film layer, two 0.2mm thick copper substrates, and a rubber protective layer. The PVDF film layer is sandwiched between the two 0.2mm thick copper substrates and tightly bonded. One 0.2mm thick copper substrate is bonded to a hemispherical curved track. The rubber protective layer is bonded to the other 0.2mm thick copper substrate. The 0.2mm thick copper substrate is electrically connected to the control circuit. The control circuit includes a full-bridge rectifier circuit, a voltage regulator circuit, a supercapacitor, and an automatic switch. The control circuit is electrically connected to the piezoelectric power generation system and the electromagnetic coil. The electrical energy generated by the PVDF thin film layer is stored in the supercapacitor through the control circuit. The supercapacitor can supply power to the electromagnetic coil to ensure the continuous operation of the damping system. The control circuit is installed in the mounting circuit interlayer.

[0006] Preferably, in the track system, the diameter of the hemispherical curved track is 20cm.

[0007] Preferably, in the roly-poly mass block, the ellipsoidal plate is made of aluminum and the sphere is made of copper; the mass ratio of the roly-poly mass block to the main structure (vibrating object) is 0.05.

[0008] Preferably, the nine linear springs are made of soft metal with a spring constant of 5–50 N / m.

[0009] Preferably, in the piezoelectric power generation system, the number of PVDF film layers is 10, and 5 PVDF film layers are connected in series to form two groups, which are then connected in parallel.

[0010] Preferably, in the eddy current damping system, the mechanical switch can change the direction of the current in the electromagnetic coil to generate a magnetic field that is in the same direction or opposite to that of the permanent magnet, thereby adjusting the intensity of the mixed magnetic field.

[0011] Compared with the prior art, the present invention has the following beneficial effects: With wide-frequency vibration reduction and adaptability to multiple scenarios, this device relies on the nonlinear structure of the roly-poly mass block and the hemispherical curved track to generate nonlinear restoring force during rolling, as well as the coordinated motion of 9 linear springs and the hemispherical curved track. The nonlinear mechanism enables it to respond in a wide frequency range, is not limited by resonance peaks, adapts to changing environments, and meets the vibration suppression needs of multiple scenarios such as home, industrial, and monitoring equipment.

[0012] It has self-powered capability and does not require an external power source. The PVDF film layer generates electrical energy (AC) as it is squeezed by the roly-poly mass block. After being rectified by a full-bridge rectifier circuit, it is stored in a supercapacitor (DC) and then used to power the eddy current damping system. The supercapacitor can store energy for a long time, ensuring the continuous operation of the damping system even if the main structure vibrates weakly (insufficient power generation). It does not require an external power source and is especially suitable for outdoor or long-term operation scenarios without power supply, reducing maintenance costs.

[0013] The damping strength is flexibly adjustable to adapt to changes in vibration intensity. The mechanical switch of the eddy current damping system changes the direction of the current in the electromagnetic coil, so that the electromagnetic coil generates a magnetic field in the same direction or opposite direction as the permanent magnet, thereby adjusting the strength of the mixed magnetic field to adapt to different vibration intensity scenarios and solving the limitation of the non-adjustable damping of traditional devices.

[0014] Multi-path coordinated energy dissipation results in highly efficient energy dissipation. On one hand, the eddy current damping system is the main energy-dissipating component, which converts mechanical energy into heat energy through the eddy current effect, resulting in high vibration reduction efficiency. On the other hand, the superposition of multiple energy-dissipating mechanisms such as mechanical friction and spring deformation significantly improves energy density and enhances vibration reduction efficiency, surpassing traditional passive devices.

[0015] Multi-directional (three-dimensional) vibration reduction: The roly-poly mass block and the hemispherical curved track work together in a nonlinear structure. During the rolling process, a nonlinear restoring force is generated to suppress lateral vibration. Nine linear springs work in tandem with the dual track system to enhance the nonlinear dynamic behavior and suppress vertical vibration. The vibration reduction mechanisms of vertical and lateral vibrations work together to form a three-dimensional vibration reduction effect. Attached Figure Description

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the permanent magnet and electromagnetic coil in this invention; Figure 3 This is a schematic diagram of the interaction between the nine linear springs and the hemispherical curved track in this invention. Figure 4 This is a structural diagram of the top cover in this invention; Figure 5 This is a structural diagram of the circuit mounting interlayer in this invention; Figure 6 This is a schematic diagram showing the positions of the copper substrate, PVDF thin film layer, and rubber protective layer in this invention; Figure 7 This is a schematic diagram illustrating the principle of magnetic field superposition enhancement / weakening in the eddy current damping system of the present invention.

[0018] Legend: 1. Outer shell; 11. Top cover; 12. Concave sliding track; 13. Circuit mounting interlayer; 14. Anti-slip rubber base; 21. Ellipsoidal thin plate; 22. Hemisphere; 31. Hemispherical curved surface track; 32. Convex slider; 41. 50mm long linear spring; 42. Fixed spring sleeve; 43. 25mm long linear spring; 51. Permanent magnet; 52. Electromagnetic coil; 61. PVDF thin film layer; 62. 0.2mm thick copper substrate; 63. Rubber protective layer. Detailed Implementation

[0019] This application provides a self-powered nonlinear energy trap multi-directional vibration damping device, which effectively solves the technical problems of traditional vibration damping devices, such as narrow frequency range, reliance on external energy, inflexible damping adjustment, and single vibration damping direction, making it difficult to adapt to the wide-frequency vibration suppression needs of multiple scenarios. Example

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, this invention provides a self-powered nonlinear energy trap multi-directional vibration reduction device. The core of the device is a synergistic mechanism of nonlinear vibration energy capture, piezoelectric self-powering, and hybrid damping energy dissipation, which solves the technical problems of narrow frequency range and dependence on external energy in traditional vibration reduction devices. It is suitable for small and medium-sized equipment or structural scenarios that require vibration suppression. Through the cooperation of various systems, it achieves multiple functions such as self-powering, wide frequency range, and multi-directional vibration reduction.

[0021] The sealed shell is the basic load-bearing structure of the device. The functions and connections of each component are as follows: Outer shell 1: Serves as the external support frame of the device. The interior space is reserved to accommodate the hemispherical curved track 31, the roly-poly mass block, 9 linear springs, permanent magnet 51, electromagnetic coil 52 and concave sliding track 12, providing a foundation for the installation and protection of the internal components.

[0022] Top cover 11: Connected to the top of the outer casing 1, it can be opened to inspect and maintain the internal circuitry and mechanical structure of the device, facilitating later operation.

[0023] Anti-slip rubber base 14: Located at the bottom of the outer shell 1, it is used to increase the friction between the device and the main structure, prevent the device from shifting due to vibration of the main structure, and reduce vibration transmission interference between the main structure and the device.

[0024] Circuit installation mezzanine 13: Provides dedicated installation space for circuit components. The full-bridge rectifier circuit, voltage regulator circuit, supercapacitor and automatic switch in the control circuit are all installed inside it, which can realize physical isolation between circuit components and mechanical moving parts, ensure stable circuit operation, and facilitate circuit wiring and maintenance.

[0025] The roly-poly mass block is the core moving component for capturing vibrational energy. Its specific structure and function are as follows: It consists of an upper ellipsoidal plate 21 and a lower hemisphere 22, and the whole can roll along the hemispherical curved track 31; its center of gravity design can ensure that it can automatically return to the center during the rolling process and avoid jamming or deviation.

[0026] The mass ratio of the roly-poly to the main structure is controlled at 0.01–0.1. This ratio maximizes the capture of the vibration energy of the main structure while avoiding additional load on the main structure from the mass.

[0027] The nine linear springs are key components for the transfer and dissipation of vibrational energy. Their specific structure and function are as follows: It consists of five 25mm long linear springs 43 and four 50mm long linear springs 41, which are symmetrically distributed between the outer shell 1 and the hemispherical curved track 31. Through compression or elongation deformation, it transfers vibration energy to the hemispherical curved track 31, while dissipating some energy.

[0028] The dual-track system suppresses vibrations in multiple directions (three dimensions), enabling efficient vibration reduction for the device. Its specific components and functions are as follows: Hemispherical curved track 31: Located inside the outer shell 1, it provides a rolling path for the roly-poly mass block. Its curvature design enables the roly-poly mass block to generate a nonlinear restoring force when rolling, so as to meet the requirements of broadband vibration capture and achieve lateral vibration suppression.

[0029] Concave sliding track 12: connected to the bottom of the outer casing 1, providing a path for the sliding of the convex slider 32.

[0030] Convex slider 32: It is arranged around the hemispherical curved track 31 and is axially symmetrically distributed. It can slide on the concave sliding track 12 and achieve vertical vibration suppression by consuming energy through friction.

[0031] The piezoelectric power generation system converts vibration mechanical energy into electrical energy, providing self-power for the device. Its specific components and functions are as follows: 0.2mm thick copper substrate 62: Covers the surface of the hemispherical curved track 31 and the surface of the PVDF thin film layer 61. On the one hand, it serves as a conductor layer of the PVDF thin film layer 61 to collect charges and connect with the control circuit to help realize the conversion of mechanical energy into electrical energy; on the other hand, it can transmit the vibration pressure of the roly-poly mass block to the piezoelectric film.

[0032] Rubber protective layer 63: It is attached to the surface of the 0.2mm thick copper substrate 62 to protect the 0.2mm thick copper substrate 62 and the PVDF film layer 61 from damage caused by direct friction with the roly-poly mass block. At the same time, it can enhance the extrusion deformation of the PVDF film layer 61 and improve the power output efficiency.

[0033] PVDF thin film layer 61: It is bonded to a 0.2mm thick copper substrate 62. When the roly-poly mass block rolls along the track, it will squeeze the PVDF thin film layer 61, causing it to generate electrical energy through the positive piezoelectric effect.

[0034] The eddy current damping system is the main energy-consuming component of the device, realizing the efficient conversion of mechanical energy into thermal energy. Its specific composition and function are as follows: Permanent magnet 51: works in conjunction with electromagnetic coil 52 to form a mixed magnetic field, providing a magnetic field basis for the generation of eddy currents.

[0035] Electromagnetic coil 52: Electrically connected to the supercapacitor in the control circuit, it can generate a magnetic field when powered by the supercapacitor, which works in conjunction with the magnetic field of permanent magnet 51 to form a mixed magnetic field.

[0036] Mechanical switch: Installed on the side of the housing 1, it is electrically connected to the supercapacitor and electromagnetic coil 52 in the control circuit. By changing the current direction of the electromagnetic coil 52, the electromagnetic coil 52 can generate magnetic field superposition (magnetic field enhancement) or magnetic field cancellation (magnetic field weakening) with the permanent magnet 51 in the same direction. This allows adjustment of the strength of the mixed magnetic field and the eddy current damping force. When the vibration is strong, the damping force is increased to consume energy efficiently, and when the vibration is weak, the damping force is decreased to avoid low-frequency failure. This adapts to different vibration intensity scenarios and solves the limitation of non-adjustable damping in traditional devices.

[0037] The control circuit is the core of the device's energy distribution and regulation. It is installed in the mounting circuit interlayer 13, and its specific composition and function are as follows: The full-bridge rectifier circuit and voltage regulator circuit are electrically connected to the 0.2mm thick copper substrate 62 in the piezoelectric power generation system. The AC power generated by the PVDF thin film layer is converted into DC power by the full-bridge rectifier circuit, and then becomes a stable voltage through the voltage regulator circuit and is stored in the supercapacitor.

[0038] The supercapacitor is used to store electrical energy for a long time and can supply power to the electromagnetic coil 52 to ensure the continuous operation of the damping system.

[0039] It also includes an automatic switch that is electrically connected to the supercapacitor. When the supercapacitor's energy accumulates to a certain level and reaches the release threshold, it controls the supercapacitor to supply power to the electromagnetic coil 52, triggering damping adjustment. When the supercapacitor's energy falls below the release threshold, it disconnects the power supply to the electromagnetic coil 52, improving the device's adaptability to different vibration environments.

[0040] The core function of the mechanical switch is to adjust the mixed magnetic field strength of the eddy current damping system. Its principle is based on controlling the magnetic field direction by the current direction. The mechanical switch is connected in series with the power supply circuit of the electromagnetic coil 52. By toggling different positions of the switch, the direction of current flow inside the electromagnetic coil 52 is changed. When the switch is turned to a certain position, the current direction causes the electromagnetic coil 52 to generate a magnetic field in the same direction as the permanent magnet 51. The combined magnetic field strength is enhanced after the two are superimposed (suitable for high vibration intensity scenarios of the main structure, such as strong vibration when the equipment is running at high speed). The eddy current damping force increases accordingly, improving energy consumption efficiency. When the switch is moved to another position, the current direction changes, causing the electromagnetic coil 52 to generate a magnetic field opposite to that of the permanent magnet 51. The two partially cancel each other out, resulting in a weaker mixed magnetic field (suitable for low-vibration scenarios of the main structure, such as weak vibrations during low-speed operation of equipment). This avoids excessive damping force leading to additional energy consumption or structural impact, achieving damping adaptation under different vibration scenarios. The principle is as follows: Figure 7 As shown.

[0041] Device assembly process: Basic structure assembly: The concave sliding track 12 is located inside the outer shell 1; the convex slider 32 is located around the hemispherical curved track 31; a 0.2mm thick copper substrate 62 is covered on the surface of the hemispherical curved track 31; then the PVDF film layer 61 is bonded to the 0.2mm thick copper substrate 62, and a rubber protective layer 63 is covered on the surface of the 0.2mm thick copper substrate 62.

[0042] Assembly of moving parts: The hemispherical curved track 31 is placed inside the outer shell 1, and the convex slider 32 is assembled with the concave sliding track 12 to verify its sliding; the ellipsoidal thin plate 21 and the hemisphere 22 are combined to form a roly-poly mass block, which is placed inside the hemispherical curved track 31 to verify its rolling smoothness and automatic return function; nine linear springs are fixedly assembled between the outer shell 1 and the hemispherical curved track 31 through the fixed spring sleeve 42, and are distributed axially symmetrically. Among them, four 50mm long linear springs 41 are axially symmetrically assembled on the circumferential edge of the hemispherical curved track 31, four 25mm long linear springs 43 are axially symmetrically assembled on the bottom of the hemispherical curved surface of the hemispherical curved track 31, and one 25mm long linear spring 43 is assembled at the bottom center of the hemispherical curved track 31.

[0043] Damping system assembly: Install the permanent magnet 51 and the electromagnetic coil 52 inside the housing 1 to ensure that they can form a mixed magnetic field; connect the mechanical switch to the electromagnetic coil 52 to complete the assembly of the eddy current damping system.

[0044] Circuit component assembly: Install the control circuit in the circuit mounting interlayer 13 and connect them according to the circuit connection relationship. The 0.2mm thick copper substrate, full-bridge rectifier circuit, voltage regulator circuit, supercapacitor, and automatic switch are electrically connected. The supercapacitor, mechanical switch, and electromagnetic coil 52 are electrically connected. Then fix the circuit mounting interlayer 13 inside the outer shell 1.

[0045] Final assembly: Install anti-slip rubber base 14 at the bottom of the outer casing 1 and top cover 11 at the top; install mechanical switch on the side of the outer casing 1 and connect it to the corresponding circuit; finally, conduct a power-on test to verify whether the power output, magnetic field adjustment and damping effect are normal.

[0046] Working principle of the device: This device utilizes the nonlinear energy trap characteristics of the track, employing a targeted energy transfer mechanism (first, energy is captured through the motion of the mass block and the track; then, energy is transferred through the nonlinear coupling between the two; and finally, energy is dissipated through internal damping elements). This allows for the unidirectional and irreversible transfer of the main structure's vibration energy to itself, which is then converted into heat energy and dissipated through internal damping elements (such as viscous damping and frictional energy dissipation). Specifically, this device achieves broadband self-powered multidirectional vibration reduction through three stages: energy capture, energy conversion, and energy dissipation. The specific process is as follows: Energy capture stage (nonlinear vibration triggering): When the main structure vibrates, the outer shell 1 and the hemispherical curved track 31 vibrate synchronously with the main structure; the roly-poly mass block generates relative motion with the main structure due to inertia, and rolls along the hemispherical curved track 31. The curvature of the track and the motion of the mass block couple to generate a nonlinear restoring force, capturing broadband vibration energy.

[0047] Energy conversion stage (piezoelectric self-powered): When the roly-poly mass block rolls, it squeezes the PVDF film layer 61. The PVDF film layer 61 generates alternating current through the positive piezoelectric effect (the positive piezoelectric effect refers to the phenomenon that when a piezoelectric material such as a PVDF film is deformed by external force, charge separation occurs inside, thus forming a potential difference at both ends of the material). The alternating current is converted into direct current by a full-bridge rectifier circuit and stored in a supercapacitor. The supercapacitor then powers the electromagnetic coil 52.

[0048] Energy dissipation stage (hybrid damping energy dissipation): Eddy current damping dominates energy dissipation: When the electromagnetic coil 52 is powered by the control circuit, it generates a magnetic field and forms a mixed magnetic field with the permanent magnet 51. When the roly-poly mass block rolls, it cuts the magnetic field lines and generates eddy currents. The eddy currents and the mixed magnetic field interact to form a damping force, which hinders the movement of the mass block and converts mechanical energy into heat energy for dissipation.

[0049] Auxiliary energy dissipation: The friction between the roly-poly mass block and the rubber protective layer 63 dissipates part of the mechanical energy; the compression or elongation deformation of the 9 linear springs dissipates energy; the sliding friction of the convex slider 32 on the concave sliding track 12 dissipates energy; further improving vibration reduction and energy dissipation efficiency.

[0050] This device uses a roly-poly mass block in conjunction with a dual-track system to suppress multi-directional (three-dimensional) vibrations. The specific process is as follows: For vertical vibration: When the main structure vibrates vertically, the spring undergoes vertical tension and compression deformation, the track undergoes vertical sliding friction, and the roly-poly motion is generated, forming eddy current damping in the magnetic field; through spring deformation, friction, and eddy current damping, energy is dissipated, thus suppressing vertical vibration.

[0051] For lateral vibration: the roly-poly toy swings in the magnetic field, forming eddy current damping, and the rolling friction at the bottom of the roly-poly toy dissipates energy; through friction and eddy current damping, energy dissipation is achieved, and lateral vibration is suppressed.

[0052] Multi-directional vibration reduction: The lateral vibration reduction mechanism and the vertical vibration reduction mechanism work together to achieve multi-directional vibration reduction effect.

[0053] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A self-powered nonlinear energy sink multi-directional vibration mitigation device, characterized by, The sealed shell, the Tumbler mass, 9 linear springs, double track system, piezoelectric power generation system, installation circuit sandwich (13), eddy current damping system and control circuit; The sealed shell includes an outer shell (1) and a top cover (11), the outer shell (1) is cylindrical, and a 3mm-thick anti-skid rubber base (14) is arranged at the bottom of the outer shell (1) to fix the vibration damping device; The Tumbler mass includes an upper ellipsoidal thin plate (21) and a lower hemispherical body (22); The 9 linear springs include 5 25mm-long linear springs (43) and 4 50mm-long linear springs (41), which are distributed in an axial symmetry, connected with the hemispherical curved track (31) and the outer shell (1), and used to transfer vibration energy and dissipate part of the energy; The double track system includes the hemispherical curved track (31) and a concave sliding track (12), the hemispherical curved track (31) is provided with 4 convex sliders (32), the convex sliders (32) slide on the concave sliding track (12), the Tumbler mass rolls on the hemispherical curved track (31), and the double track system realizes multidirectional vibration damping; The eddy current damping system includes a permanent magnet (51), an electromagnetic coil (52) and a mechanical switch, the mechanical switch is electrically connected with the electromagnetic coil (52), and the eddy current damping system provides damping force for the rolling of the Tumbler mass and suppresses the movement of the Tumbler mass; The piezoelectric power generation system includes a polyvinylidene fluoride (PVDF) film layer (61) and a 0.2mm-thick copper substrate (62), the PVDF film layer (61) is attached to the 0.2mm-thick copper substrate (62), and the 0.2mm-thick copper substrate (62) is electrically connected with the control circuit; The control circuit includes a full-bridge rectifier circuit, a voltage stabilizing circuit, a super capacitor and an automatic switch, the control circuit is electrically connected with the piezoelectric power generation system and the electromagnetic coil (52), alternating current generated by the PVDF film layer is stored in the super capacitor through the control circuit, the super capacitor can supply power to the electromagnetic coil 52, ensuring continuous operation of the damping system, and the control circuit is installed in the installation circuit sandwich (13).

2. The vibration damping device according to claim 1, characterized by The 9 linear springs are soft metal springs, and the elastic coefficient is 5-50N / m.

3. The vibration damping device according to claim 1, characterized by The PVDF film layer (61) has 10 layers, 5 layers of the PVDF film layer (61) are connected in series to form a group, two groups are formed, and the two groups are connected in parallel.

4. The vibration damping device according to claim 1, characterized by The PVDF film layer (61) is tightly attached between the two 0.2mm-thick copper substrates (62), one 0.2mm-thick copper substrate (62) is attached to the hemispherical curved track (31), and a 1mm-thick rubber protection layer (63) is attached to the other 0.2mm-thick copper substrate (62).

5. The vibration damping device according to claim 1, characterized by The mass ratio of the Tumbler mass to the main structure (vibration body) is 0.01-0.1, preferably 0.

05.

6. The vibration damping device according to claim 1, characterized by The installation circuit sandwich (13) inside the outer shell is detachable, facilitating replacement of the control circuit module.

7. Use of a damping device according to any one of claims 1 - 6, characterized in that The application is applied to vibration suppression of industrial equipment, precision instrument platforms, bridge monitoring equipment or household appliances.

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