A vibration suppression-energy harvesting integrated energy harvesting system

Abstract

The present invention relates to the field of energy harvesting, and particularly to a vibration suppression - energy capture integrated energy harvesting system, which combines vibration suppression and vibration energy harvesting. It can be applied to high - energy - density and small - volume vibration suppression energy harvesting structures inside aircraft, rockets and other aircraft, and can effectively harvest and convert the strong vibration energy during their operation into electrical energy. While protecting the aircraft's instruments and meters from damage, it efficiently utilizes the energy. During the operation of spacecraft such as rockets and aircraft, their vibration environment has characteristics such as a wide frequency band and large energy. According to different combinations of disc springs, a energy capture coupling vibration isolation structure applicable to high - intensity vibration environments can be fabricated to suit the narrow space and continuous - working vibration environment among various instrument panel devices, avoiding damage and failures of instruments and meters during the operation of spacecraft, which is of great significance to the development of aerospace technology.

Description

Technical Field

[0001] The present invention relates to the field of energy harvesting, and particularly to a vibration suppression - energy harvesting integrated energy harvesting system. Background Art

[0002] In recent years, with the rapid development of aerospace technology, the integrated design of electrical systems has become increasingly mature. The complex electronic systems of spacecraft have gradually achieved modular, integrated, and combined designs. These developments have put forward new requirements for the power supply technology of aircraft and rocket electronic systems, as well as the vibration isolation and vibration suppression technologies of spacecraft.

[0003] The vibration isolation and damping technologies of spacecraft structures are a relatively traditional research field. However, the existing vibration isolation and damping devices are relatively large in size and cannot meet the damping requirements of integrated electronic systems or boards. Achieving miniaturization of the damping system and, on the basis of effectively suppressing the vibration of the aircraft itself, utilizing the vibration energy, collecting the energy generated during vibration in real - time, and using and storing it play an important role in promoting new - era sounding missions. The collection of the vibration energy of the aircraft can not only extend the battery life of its power supply battery pack, but also reduce the scale of the battery pack to a certain extent and improve the payload capacity of the aircraft. Therefore, the research on the suppression of aircraft vibration and the research on the efficient collection and utilization of vibration energy are of great significance, and the research on the fusion technology of composite energy self - pickup and aircraft structure vibration suppression has high application value. Summary of the Invention

[0004] To solve the above problems, the present invention provides a vibration suppression - energy harvesting integrated energy harvesting system, including: a fixing plate, a packaging shell, an inner cylinder, a first magnet, a second magnet, a third magnet, a first coil, a flexible shell, a base, a disc spring, a damper, a fourth magnet, and a second coil; the packaging shell is fixed on the upper surface of the fixing plate, the inner cylinder is arranged inside the packaging shell, the inner cylinder is fixed between the top of the fixing plate and the packaging shell, the first magnet, the second magnet, and the third magnet are arranged inside the inner cylinder, the first magnet and the third magnet are respectively fixed on the top of the inner cylinder and the fixing plate, the second magnet is arranged between the first magnet and the third magnet, the like - named magnetic poles of the first magnet and the second magnet are arranged opposite to each other, the like - named magnetic poles of the second magnet and the third magnet are arranged opposite to each other, the first coil is arranged between the packaging shell and the inner cylinder, the upper and lower ends of the flexible shell are respectively fixed to the fixing plate and the base, there are multiple disc springs, and multiple disc springs are connected relatively to form a disc spring group. The bottom of the disc spring group is fixed to the base, the damper is arranged inside the disc spring group, the connecting rod of the damper is fixed to the fixing plate, the top of the disc spring group is fixed to the damper, the fourth magnet is fixed to the bottom of the damper, and the second coil is fixed to the base.

[0005] Furthermore, the packaging shell is circular.

[0006] Furthermore, the inner cylinder is circular.

[0007] Furthermore, the packaging shell is coaxial with the inner cylinder.

[0008] Furthermore, the flexible housing is circular.

[0009] Furthermore, the flexible housing is coaxial with the encapsulating housing.

[0010] Furthermore, the damper is a hydraulic damper.

[0011] Furthermore, the connecting rod is a hydraulic rod.

[0012] Furthermore, the second coil surrounds the disc spring assembly.

[0013] Furthermore, the disc spring assembly does not contact the flexible housing.

[0014] Beneficial effects of the present invention: The present invention provides a vibration suppression-energy capture integrated energy collection system, which combines vibration suppression with vibration energy collection, and can be applied to high energy density, small volume vibration suppression energy collection structures inside aircrafts, rockets, etc., and can effectively collect and convert strong vibration energy during operation into electrical energy, while protecting the instruments and meters of the aircraft from damage and making efficient use of energy. During the operation of rockets, aircrafts, etc., the vibration environment has the characteristics of wide bandwidth and large energy, and disc springs are used to suppress vibration. Since disc springs have wide bandwidth, high strength, small volume, and can withstand large loads with small deformation, energy capture coupling vibration isolation structures applicable to high-intensity vibration environments can be produced according to different combinations of disc springs, so as to be applicable to the narrow space between various instrument dials and equipment and the vibration environment of continuous operation, and to avoid damage and failure of instruments and meters during the operation of spacecraft, which is of great significance to the development of aerospace technology.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a vibration suppression and energy capture integrated energy harvesting device.

[0017] In the figure: 1, fixed plate; 2, packaging shell; 3, inner cylinder; 4, first magnet; 5, second magnet; 6, third magnet; 7, first coil; 8, flexible shell; 9, base; 10, disc spring; 11, damper; 12, fourth magnet; 13, second coil; 111, connecting rod. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions and advantages of the present application more clear and understandable, the following provides further detailed descriptions of the present application with reference to the accompanying drawings and by way of examples.

[0019] The present invention provides a vibration suppression - energy harvesting integrated energy harvesting system, as Figure 1As shown in the figure, it includes a fixing plate 1, a packaging shell 2, an inner cylinder 3, a first magnet 4, a second magnet 5, a third magnet 6, a first coil 7, a flexible shell 8, a base 9, a disc spring 10, a damper 11, a fourth magnet 12, and a second coil 13. The first magnet 4, the second magnet 5, the third magnet 6, and the fourth magnet 12 are all permanent magnets. During application, the fixing plate 1 is fixedly connected to the object that needs vibration damping. In the present invention, the object that needs vibration damping is called a vibration-damping body. For example, when a circuit board needs vibration damping, the circuit board is fixedly connected to the fixing plate 1. Additionally, during application, the fixing plate 1 can also be the vibration-damping body that needs vibration damping, and other components of the present invention are fixedly connected to the vibration-damping body. The packaging shell 2 is circular. The material of the packaging shell 2 is stainless steel, which is more resistant to impact in a vibration environment and has high reliability. The size of the packaging shell 2 is: the diameter is greater than 5 cm and less than 10 cm; the height is greater than 5 cm and less than 10 cm. The axis of the packaging shell 2 is along the normal direction of the fixing plate 1. The packaging shell 2 is fixed on the upper surface of the fixing plate 1. Specifically, a flange is provided at the bottom of the packaging shell 2, and a plurality of equally spaced round holes are provided on the flange for mounting the packaging shell 2 on the fixing plate 1. The inner cylinder 3 is circular. The material of the inner cylinder 3 is aluminum alloy or abs material, which limits the first magnet 4, the second magnet 5, and the third magnet 6, plays a role in isolating the first magnet 4, the second magnet 5, the third magnet 6 and the first coil 7, and protects the first coil 7 from being damaged. The size of the inner cylinder 3 is: the diameter is greater than 3 cm and less than 5 cm; the height is greater than 5 cm and less than 10 cm. The axis direction of the inner cylinder 3 is along the normal direction of the fixing plate 1. The inner cylinder 3 is arranged inside the packaging shell 2, and the inner cylinder 3 is fixed between the top of the fixing plate 1 and the packaging shell 2, and the packaging shell 2 and the inner cylinder 3 are coaxial. In this way, the inner cylinder 3 is clamped between the fixing plate 1 and the packaging shell 2, increasing the structural stability and also maximizing the distance between the first magnet 4 and the third magnet 6, that is, maximizing the movement space of the second magnet 5 and improving the conversion efficiency from kinetic energy to electrical energy. The first magnet 4, the second magnet 5, and the third magnet 6 are arranged inside the inner cylinder 3. The first magnet 4, the second magnet 5, and the third magnet 6 are disc-shaped. The first magnet 4 and the third magnet 6 are respectively fixed on the top of the inner cylinder 3 and the fixing plate 1, and the second magnet 5 is arranged between the first magnet 4 and the third magnet 6. The like-named magnetic poles of the first magnet 4 and the second magnet 5 are arranged opposite to each other, and the like-named magnetic poles of the second magnet 5 and the third magnet 6 are arranged opposite to each other, so that the second magnet 5 is suspended between the first magnet 4 and the third magnet 6. The first coil 7 is arranged between the packaging shell 2 and the inner cylinder 3. The first coil 7 has multiple turns, the inner wall of the first coil 7 closely adheres to the outer wall of the inner cylinder 3, and the outer wall of the first coil 7 closely adheres to the inner wall of the packaging shell 2.

[0020] During Figure 1In the embodiment, the encapsulating shell 2, the inner cylinder 3, the first magnet 4, the second magnet 5, the third magnet 6, and the first coil 7 constitute a first energy harvesting structure. When the system vibrates, due to the inertia of the second magnet 5, the second magnet 5 moves up and down in the inner cylinder to compress the magnetic field line, thereby changing the magnetic flux passing through the first coil 7, especially changing the positive and negative signs of the magnetic flux in the first coil 7, and generating an induced electromotive force in the first coil 7. Specifically, it is assumed that the upper part of the second magnet 5 is the S pole and the lower part is the N pole; when the second magnet 5 moves to contact the first magnet 4 under the vibration environment, the N pole magnetic field line of the lower part of the second magnet 5 and the upper part of the third magnet 6 is amplified, and the magnetic flux passing through the coil is all N poles; when the second magnet 5 moves to contact the third magnet 6, the N pole magnetic field line is compressed, the S pole magnetic field line of the upper part of the second magnet 5 and the lower part of the first magnet 4 is amplified, and the magnetic flux passing through the coil is all S poles; so during the vibration process, the positive and negative signs of the magnetic flux equivalent to passing through the coil are constantly changing, greatly enhancing the induced electromotive force. Since the moving direction of the second magnet 5 is always opposite to the vibration direction of the present invention during the vibration of the system, the second magnet 5 provides a reverse force based on the vibration elimination principle, effectively absorbing the vibration kinetic energy of the system and converting it into electrical energy. In addition, the inner cylinder 3, the first magnet 4, the second magnet 5, the third magnet 6, and the first coil 7 are arranged in the packaging shell 2, which has a good protective effect on the internal components.

[0021] The flexible shell 8 is circular. The material of the flexible shell 8 is a rubber product so as to effectively absorb vibration energy. The dimensions of the flexible shell 8 are: the diameter is greater than 5 cm and less than 10 cm; the height is greater than 5 cm and less than 10 cm. The axis of the flexible shell 8 is along the normal direction of the fixed plate 1, and the flexible shell 8 is coaxial with the encapsulation shell 2. The upper end and the lower end of the flexible shell 8 are fixedly connected to the fixed plate 1 and the base 9 respectively. There are a plurality of equally spaced circular holes on the base 9 for installation of the present invention. There are a plurality of disc springs 10, and a plurality of disc springs 10 are relatively connected to form a disc spring group. The disc spring group does not contact the flexible shell 8. The bottom of the disc spring group is fixed to the base 9. The damper 11 is arranged in the disc spring group, and the connecting rod 111 of the damper 11 is fixedly connected to the fixed plate 1. Specifically, the damper 11 is a hydraulic damper, and the connecting rod 111 is a hydraulic rod, and the direction of the hydraulic rod is along the normal direction of the fixed plate 1. The hydraulic rod is provided with a screw hole for fixing the damper 11 to the fixed plate 1. The hydraulic damper can withstand large loads and can absorb large vibration energy. It is suitable for high-intensity vibration environments such as aircraft and rockets and has high reliability. The top of the disc spring group is fixedly connected to the damper 11. The present invention sets the damper 11 inside the disc spring 10, making full use of the space and reducing the size of the entire system. The fourth magnet 12 is fixed to the bottom of the damper 11, making full use of the space inside the disc spring 10. The second coil 13 is fixed to the base 9, the second coil 13 is multi-turn, and the second coil 13 surrounds the disc spring group.

[0022] In Figure 1 it, the flexible housing 8, the base 9, the disc spring 10, and the damper 11 constitute a vibration suppression structure. Under the excitation of external vibration, the position of the base 9 moves up and down. During the movement, the disc spring 10 is compressed. The vibration suppression structure uses the vibration isolation principle to efficiently convert the vibration energy of the base 9 into the potential energy of the disc spring 10, and converts the potential energy into heat energy through the damper 11 and consumes it, effectively preventing the vibration from being transmitted from the vibration source to the vibration damping body. The fourth magnet 12 and the second coil 13 constitute a second energy harvesting structure, which fully harvests the vibration energy. When the disc spring 10 deforms, the distance between the fourth magnet 12 and the second coil 13 also changes, the magnetic flux in the second coil 13 changes, and an induced electromotive force is also generated in the second coil 13, converting the vibration energy into electrical energy to form the second energy harvesting structure. In addition, the disc spring 10, the damper 11, the second coil 13, and the fourth magnet 12 are placed inside the flexible housing 8, which has a good protective effect on the internal components.

[0023] The present invention makes full use of space, integrates vibration suppression and energy capture, has a small size of the system, and can be used for vibration suppression and energy harvesting with small volume and high intensity in the vibration environment of equipment such as aircraft, ships, and aerospace. It is particularly suitable for narrow spaces between multiple board connections and the connection points between instruments and equipment, which is of great significance for the maintenance and safety of the equipment. Specifically, when used to connect board cards, the packaging housing 2 and the flexible housing 8 in the present system can conveniently act as support columns.

[0024] Furthermore, the second coil 13 is arranged inside the disc spring group. The second coil 13 is wound into a cylindrical shape. The diameter of the second coil 13 is larger than the diameters of the damper 11 and the fourth magnet 12 and smaller than the diameter of the disc spring group. When the disc spring group vibrates, the second coil 13 will not contact the damper 11, the fourth magnet 12, and the disc spring group. When the damper 11 moves up and down, the fourth magnet 12 can extend into the second coil 13, thereby changing the magnetic flux passing through the second coil 13 more, and then generating a stronger induced electromotive force in the second coil 13.

[0025] Furthermore, the diameter of the flexible housing 8 is equal to the diameter of the packaging housing 2, which is adapted to the axial space connection of the same equipment.

[0026] Furthermore, among the first magnet 4, the second magnet 5, and the third magnet 6, the first magnet 4 and the third magnet 6 have the same specifications, ensuring that the second magnet 5 can be stably suspended at the center of the first magnet 4 and the third magnet 6; the second magnet 5 is weaker, which can reduce the stiffness condition of the repulsive force between the magnets. The lower the stiffness, the lower the frequency required for the second magnet 5 to vibrate.

[0027] Furthermore, a through hole is provided in the second magnet 5, and the air on both the upper and lower sides of the second magnet 5 can pass through the through hole, facilitating the more free up and down movement of the second magnet 5, thereby improving the conversion efficiency from kinetic energy to electrical energy.

[0028] The present invention is installed in the axial installation space of the vibration damping body and can effectively prevent the transmission of the vibration source from the base 9 to the vibration damping body. On aircraft, rockets and other spacecrafts, the vibration environment has characteristics such as wide frequency band, large acceleration, and high vibration intensity. The frequency of random vibration can cover from several to thousands of hertz. Placing the vibration suppression structure below, in the ultra-high frequency vibration environment, a large amount of high-frequency vibration energy is blocked by the deformation and friction of the flexible outer shell 8 and the disc spring 10. However, for the vibration environment with large low-frequency amplitudes and high intensity, the vibration suppression structure cannot achieve a high vibration suppression rate. Therefore, a first energy collection structure is provided above the vibration damping body, which can effectively collect energy and convert it into electrical energy in the vibration environment with large low-frequency amplitudes. At the same time, the movement direction of the second magnet 5 in the structure is always opposite to that of the vibration damping body, providing a reverse force to the vibration damping body during vibration and improving the vibration suppression effect on the vibration damping body. In addition, relying on the deformation characteristics of the disc spring 10 and the damper 11, the vibration energy with a higher frequency can be converted upward into a lower frequency band, enabling the composite energy collection device above to work effectively. Thus, the entire system has a high vibration suppression rate and energy collection efficiency in each frequency band.

[0029] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A vibration suppression - energy harvesting integrated energy harvesting system, characterized in that, it includes: a fixing plate, a packaging shell, an inner cylinder, a first magnet, a second magnet, a third magnet, a first coil, a flexible shell, a base, a disc spring, a damper, a fourth magnet, and a second coil; the packaging shell is fixed on the upper surface of the fixing plate, the inner cylinder is arranged inside the packaging shell, the inner cylinder is fixed between the top of the fixing plate and the packaging shell, the first magnet, the second magnet, and the third magnet are arranged inside the inner cylinder, the first magnet and the third magnet are respectively fixed on the top of the inner cylinder and the fixing plate, the second magnet is arranged between the first magnet and the third magnet, the like - named magnetic poles of the first magnet and the second magnet are arranged opposite to each other, the like - named magnetic poles of the second magnet and the third magnet are arranged opposite to each other, the first coil is arranged between the packaging shell and the inner cylinder, the upper and lower ends of the flexible shell are respectively fixedly connected to the fixing plate and the base, there are multiple disc springs, and multiple disc springs are connected relatively to form a disc spring group, the bottom of the disc spring group is fixed to the base, the damper is arranged inside the disc spring group, the connecting rod of the damper is fixedly connected to the fixing plate, the top of the disc spring group is fixedly connected to the damper, the fourth magnet is fixed to the bottom of the damper, and the second coil is fixed on the base.

2. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 1, characterized in that: the packaging shell is circular.

3. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 2, characterized in that: the inner cylinder is circular.

4. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 3, characterized in that: the packaging shell and the inner cylinder are coaxial.

5. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 4, characterized in that: the flexible shell is circular.

6. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 5, characterized in that: the flexible shell and the packaging shell are coaxial.

7. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 1, characterized in that: the damper is a hydraulic damper.

8. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 7, characterized in that: the connecting rod is a hydraulic rod.

9. The vibration suppression - energy harvesting integrated energy harvesting system according to claim 1, characterized in that: the second coil surrounds the disc spring group.

10. The vibration suppression - energy harvesting integrated energy harvesting system according to any one of claims 1 - 9, characterized in that: the disc spring group does not contact the flexible shell.

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