CN114285325A

CN114285325A - Vibration suppression-energy harvesting integrated energy acquisition system

Info

Publication number: CN114285325A
Application number: CN202210077741.4A
Authority: CN
Inventors: 崔娟; 郝聪聪; 白善明; 郑永秋; 薛晨阳; 李刚; 刘亭杉
Original assignee: North University of China
Current assignee: North University of China
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-04-05

Abstract

The invention relates to the field of energy collection, in particular to a vibration suppression-energy harvesting integrated energy collection system, which combines vibration suppression and vibration energy collection, is suitable for high-energy-density and small-volume vibration suppression energy collection structures in aircrafts such as airplanes and rockets, can effectively collect and convert strong vibration energy in the work into electric energy, and can efficiently utilize the energy while protecting the instruments and meters of the aircrafts from being damaged. In the working of spacecrafts such as rockets and airplanes, the vibration environment has the characteristics of wide frequency band, large energy and the like, and the energy harvesting coupling vibration isolation structure suitable for the high-strength vibration environment can be manufactured according to different combination forms of disc springs so as to be suitable for the vibration environment of narrow space and continuous working among various instrument dial devices, avoid the damage and the fault of instruments and meters in the working process of the spacecrafts, and have important significance for the development of aerospace technology.

Description

Vibration suppression-energy harvesting integrated energy acquisition system

Technical Field

The invention relates to the field of energy collection, in particular to a vibration suppression-energy harvesting integrated energy collection system.

Background

In recent years, with the rapid development of aerospace technologies, the integrated design of electrical systems is becoming mature. The complex electronic system of the spacecraft gradually realizes modular, integrated and combined design, and the development of the system puts new requirements on the power supply technology of the electronic system of the aircraft and the rocket and the vibration isolation and vibration suppression technology of the spacecraft.

The vibration isolation and damping technology of the spacecraft structure is a more traditional research field, but the existing vibration isolation and damping device has larger volume and can not meet the damping requirement of an integrated electronic system or a board card. The vibration reduction system is miniaturized, vibration energy is utilized on the basis of effectively inhibiting the self vibration of the aircraft, energy generated in vibration is collected in real time and is utilized and stored, and an important promotion effect is played on a new-era exploration task. The collection of the vibration energy of the aircraft can not only prolong the endurance time of the power supply battery pack, but also reduce the size of the battery pack on a certain scale and improve the loading capacity of the aircraft. Therefore, the method has great significance for the inhibition research of the aircraft vibration and the research work of vibration energy collection and efficient utilization, and has higher application value for developing the fusion technical research of composite energy self-pickup and aircraft structure vibration inhibition.

Disclosure of Invention

In order to solve the above problems, the present invention provides a vibration suppression-energy harvesting integrated energy harvesting system, comprising: the device comprises 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 tube is arranged in the packaging shell, the inner tube is fixed between the fixing plate and the top of the packaging shell, the first magnet, the second magnet and the third magnet are arranged in the inner tube, the first magnet and the third magnet are respectively fixed on the top of the inner tube and the fixing plate, the second magnet is arranged between the first magnet and the third magnet, like magnetic poles of the first magnet and the second magnet are oppositely arranged, like magnetic poles of the second magnet and the third magnet are oppositely arranged, the first coil is arranged between the packaging shell and the inner tube, the upper end and the lower end of the flexible shell are respectively fixedly connected with the fixing plate and the base, a plurality of disc springs are oppositely connected to form a disc spring group, the bottom of the disc spring group is fixed with the base, the damper is arranged in the disc spring group, and a connecting rod of the damper is fixedly connected with the fixing plate, the top of the disc spring set is fixedly connected with the damper, the fourth magnet is fixed at the bottom of the damper, and the second coil is fixed on the base.

Further, the package housing is circular.

Further, the inner barrel is circular.

Further, the outer enclosure is coaxial with the inner barrel.

Still further, the flexible enclosure is circular.

Further, the flexible housing is coaxial with the encapsulating housing.

Further, the damper is a hydraulic damper.

Further, the links are hydraulic rods.

Further, the second coil surrounds the disc spring assembly.

Further, the disc spring packs are not in contact with the flexible housing.

The invention has the beneficial effects that: the invention provides a vibration suppression-energy harvesting integrated energy harvesting system, which combines vibration suppression and vibration energy harvesting, is suitable for high-energy-density and small-volume vibration suppression energy harvesting structures in aircrafts such as airplanes and rockets, can effectively harvest and convert strong vibration energy in the work into electric energy, and can efficiently utilize the energy while protecting the instruments and meters of the aircrafts from being damaged. In the working of spacecrafts such as rockets and airplanes, the vibration environment has the characteristics of wide frequency band, large energy and the like, the disk spring is applied to inhibit vibration, and the disk spring has wide frequency band, high strength and small volume and can bear large load with small deformation, so that a energy harvesting coupling vibration isolation structure applicable to the high-strength vibration environment can be manufactured according to different combination forms of the disk spring, so that the vibration environment is suitable for narrow space and continuous working among various instrument dial devices, the damage and the fault of instruments and meters in the working process of the spacecrafts are avoided, and the development of aerospace technology is of great significance.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a vibration suppression-energy harvesting integrated energy harvesting device.

In the figure: 1. a fixing plate; 2. a package housing; 3. an inner barrel; 4. a first magnet; 5. a second magnet; 6. a third magnet; 7. a first coil; 8. a flexible housing; 9. a base; 10. a disc spring; 11. a damper; 12. a fourth magnet; 13. a second coil; 111. a connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.

The invention provides a vibration suppression-energy harvesting integrated energy harvesting system, which comprises 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, wherein the fixing plate is shown in figure 1. The first magnet 4, the second magnet 5, the third magnet 6, and the fourth magnet 12 are all permanent magnets. When the vibration damping device is applied, the fixing plate 1 is fixedly connected with an object needing vibration damping. In the present invention, an object requiring vibration damping is referred to as a vibration damping body. For example, when the board needs to be damped, the board is fixedly connected to the fixed plate 1. In addition, the fixing plate 1 may be a vibration damping body that requires vibration damping when applied, and other members of the present invention may be fixed to the vibration damping body. The package housing 2 is circular. The packaging shell 2 is made of stainless steel materials, so that the packaging shell is more impact-resistant in a vibration environment and has high reliability. The dimensions of the package housing 2 are: the diameter is more than 5cm and less than 10 cm; the height is more than 5cm and less than 10 cm. The axis of the package housing 2 is along the normal direction of the fixing plate 1. The package housing 2 is fixed on the upper surface of the fixing plate 1. Specifically, the bottom of the package housing 2 is provided with a flange plate, and the flange plate is provided with a plurality of equidistant round holes for the package housing 2 to be mounted on the fixing plate 1. The inner cylinder 3 is circular. The material of inner tube 3 is aluminum alloy or abs material, and is spacing first magnet 4, second magnet 5, third magnet 6, plays isolated first magnet 4, second magnet 5, third magnet 6 and first coil 7's effect, and protection first coil 7 is not damaged. The dimensions of the inner barrel 3 are: the diameter is more than 3cm and less than 5 cm; the height is more than 5cm and less than 10 cm. The axial direction of the inner cylinder 3 is along the normal direction of the fixed plate 1. The inner cylinder 3 is arranged in the packaging shell 2, the inner cylinder 3 is fixed between the fixing plate 1 and the top of the packaging shell 2, and the packaging shell 2 is coaxial with the inner cylinder 3. Thus, the inner cylinder 3 is clamped between the fixing plate 1 and the packaging shell 2, the structural stability is increased, the distance between the first magnet 4 and the third magnet 6 is prolonged to the maximum extent, the movement space of the second magnet 5 is expanded to the maximum extent, and the conversion efficiency from the kinetic energy to the electric energy is improved. The first magnet 4, the second magnet 5, and the third magnet 6 are provided in the inner tube 3. The first magnet 4, the second magnet 5, and the third magnet 6 are disk-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 magnetic poles of the first magnet 4 and the second magnet 5 are arranged to face each other, and the like magnetic poles of the second magnet 5 and the third magnet 6 are arranged to face 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 disposed between the package housing 2 and the inner tube 3. The first coil 7 is provided with a plurality of turns, the inner wall of the first coil 7 is tightly attached to the outer wall of the inner barrel 3, and the outer wall of the first coil 7 is tightly attached to the inner wall of the packaging shell 2.

In fig. 1, the package case 2, the inner tube 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 within the inner cylinder compressing the magnetic field lines to change the magnetic flux passing through the first coil 7, particularly changing the sign of the magnetic flux in the first coil 7, generating an induced electromotive force in the first coil 7. Specifically, it is assumed that the upper part of the second magnet 5 is an S pole and the lower part thereof is an N pole; when the second magnet 5 moves to contact with the first magnet 4 under the vibration environment, N-pole magnetic field lines at the lower part of the second magnet 5 and the upper part of the third magnet 6 are amplified, and magnetic flux passing through the coil is all N-pole; when the second magnet 5 moves into contact with the third magnet 6, the N-pole magnetic field lines are compressed, the S-pole magnetic field lines at the upper part of the second magnet 5 and the lower part of the first magnet 4 are amplified, and the magnetic flux passing through the coil is all S-pole; the sign equivalent to the magnetic flux passing through the coil is constantly changing during vibration, greatly enhancing the induced electromotive force. Because the moving direction of the second magnet 5 is always opposite to the vibration direction of the invention in the vibration process of the system, the second magnet 5 provides a reverse acting force by relying on the vibration elimination principle, thereby effectively absorbing the vibration kinetic energy of the system and converting the vibration kinetic energy into electric energy. In addition, the inner tube 3, the first magnet 4, the second magnet 5, the third magnet 6, and the first coil 7 are provided in the package case 2, and thus, the internal elements are protected well.

The flexible housing 8 is circular. The material of the flexible housing 8 is rubber so as to efficiently absorb vibration energy. The dimensions of the flexible housing 8 are: the diameter is more than 5cm and less than 10 cm; the height is more than 5cm 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 packaging shell 2. The upper end and the lower end of the flexible shell 8 are respectively fixedly connected with the fixed plate 1 and the base 9. The base 9 has a plurality of equally spaced circular holes for mounting the present invention. The disc springs 10 are plural, and the plural disc springs 10 are connected to each other to form a disc spring group. The disc spring packs are not in contact with the flexible housing 8. The bottom of the disc spring group is fixed with 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 with the fixed plate 1. Specifically, the damper 11 is a hydraulic damper, and the link 111 is a hydraulic rod, the direction of which is along the normal direction of the fixed plate 1. The hydraulic rod is provided with a screw hole for fixedly connecting the damper 11 on the fixing plate 1. The hydraulic damper has large bearable load, can know large vibration energy, is suitable for high-strength vibration environments such as airplanes and rockets and has high reliability. The top of the disc spring set is fixedly connected with the damper 11. The damper 11 is arranged inside the disc spring 10, so that the space is fully utilized, and the size of the whole system is reduced. The fourth magnet 12 is fixed to the bottom of the damper 11, and makes full use of the space inside the disc spring 10. The second coil 13 is fixed on the base 9, the second coil 13 is a plurality of turns, and the second coil 13 surrounds the belleville spring set.

In fig. 1, the flexible housing 8, the base 9, the disc spring 10, and the damper 11 constitute a vibration damping structure. Under the excitation of external vibrations, the position of the base 9 moves up and down, during which the belleville springs 10 are compressed. The vibration suppression structure utilizes 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 to be consumed, thereby effectively preventing the vibration from being transmitted from a vibration source to the vibration reduction body. The fourth magnet 12 and the second coil 13 constitute a second energy harvesting structure that sufficiently harvests the vibrational energy. When the disk spring 10 deforms, the distance between the fourth magnet 12 and the second coil 13 is also changed, the magnetic flux in the second coil 13 changes, induced electromotive force is also generated in the second coil 13, and the vibration energy is converted into electric energy to form a second energy collection structure. In addition, the belleville spring 10, the damper 11, the second coil 13 and the fourth magnet 12 are arranged in the flexible shell 8, and the internal elements are well protected.

The invention fully utilizes the space, integrates the vibration suppression and energy harvesting, has small system size, can be used for small-volume and high-strength vibration suppression and energy collection in the vibration environment of equipment such as airplanes, ships, spaceflight and the like, is particularly suitable for narrow space among the connection of a plurality of board cards and the connection part of instruments and meters and equipment, and has important significance on the maintenance and safety of the equipment. In particular, the package housing 2 and the flexible housing 8 in the present system can be conveniently used for the function of a support post when used for connecting boards.

Further, a second coil 13 is provided inside the disc spring group, the second coil 13 is wound in a cylindrical shape, and 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 does 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 protrude into the second coil 13, thereby changing the magnetic flux passing through the second coil 13 more, and generating a stronger induced electromotive force in the second coil 13.

Furthermore, the diameter of the flexible casing 8 is equal to the diameter of the packaging casing 2, adapted to the axial spatial connection of the same device.

Furthermore, among the first magnet 4, the second magnet 5 and the third magnet 6, the specifications of the first magnet 4 and the third magnet 6 are consistent, so that the second magnet 5 can stably suspend in the centers of the first magnet 4 and the third magnet 6; the second magnet 5 is weaker, and the rigidity condition of the repulsive force between the magnets can be reduced, and the lower the rigidity, the lower the frequency required for the second magnet 5 to vibrate.

Furthermore, the second magnet 5 is provided with a through hole, and air on the upper side and the lower side of the second magnet 5 can pass through the through hole, so that the second magnet 5 can move up and down more freely, and the conversion efficiency from kinetic energy to electric energy is improved.

The invention is arranged on the axial installation space of the vibration damping body, and can effectively prevent the vibration source from being transmitted from the base 9 to the vibration damping body. On the spacecraft such as an airplane, a rocket and the like, the vibration environment has the characteristics of wide frequency band, large acceleration, high vibration strength and the like, the frequency of random vibration can cover from several kilohertz to kilohertz, the vibration suppression structure is placed below, in the ultrahigh frequency vibration environment, a large amount of high-frequency vibration energy can be blocked by means of deformation and friction of the flexible shell 8 and the disc spring 10, but for the low-frequency large-amplitude vibration environment with high strength, the vibration suppression structure cannot reach high-efficiency vibration suppression rate, so that the first energy acquisition structure is arranged above the vibration suppression body, energy can be effectively acquired and converted into electric energy in the low-frequency large-amplitude vibration environment, meanwhile, the motion direction of the second magnet 5 in the structure is always opposite to that of the vibration suppression body, a reverse acting force is provided for the vibration suppression body in vibration, and the vibration suppression effect on the vibration suppression body is improved; in addition, by means of the deformation characteristics of the disc spring 10 and the damper 11, the vibration energy with higher frequency can be upwards converted into vibration with lower frequency band, so that the composite energy collecting device above the composite energy collecting device works effectively; therefore, the whole system has high-efficiency vibration suppression rate and energy collection efficiency in each frequency band.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vibration suppression-energy harvesting integrated energy harvesting system is characterized by comprising: the device comprises 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 tube is arranged in the packaging shell, the inner tube is fixed between the fixing plate and the top of the packaging shell, the first magnet, the second magnet and the third magnet are arranged in the inner tube, the first magnet and the third magnet are respectively fixed on the top of the inner tube and the fixing plate, the second magnet is arranged between the first magnet and the third magnet, like magnetic poles of the first magnet and the second magnet are oppositely arranged, like magnetic poles of the second magnet and the third magnet are oppositely arranged, the first coil is arranged between the packaging shell and the inner tube, the upper end and the lower end of the flexible shell are respectively fixedly connected with the fixing plate and the base, a plurality of disc springs are arranged, and the disc springs are oppositely connected to form a disc spring group, the bottom of the disc spring set is fixed with the base, the damper is arranged in the disc spring set, a connecting rod of the damper is fixedly connected with the fixing plate, the top of the disc spring set is fixedly connected with the damper, the fourth magnet is fixed at the bottom of the damper, and the second coil is fixed on the base.

2. The vibration-suppressing, energy-harvesting, integrated energy harvesting system of claim 1, wherein: the packaging shell is circular.

3. The vibration suppressing-harvesting energy integrating type energy harvesting system of claim 2, wherein: the inner cylinder is circular.

4. The vibration suppressing-harvesting energy integrating type energy harvesting system of claim 3, wherein: the encapsulating housing is coaxial with the inner barrel.

5. The vibration-suppressing, energy-harvesting, integrated energy harvesting system of claim 4, wherein: the flexible housing is circular.

6. The vibration suppressing-harvesting energy integrating type energy harvesting system of claim 5, wherein: the flexible housing is coaxial with the enclosure housing.

7. The vibration-suppressing, energy-harvesting, integrated energy harvesting system of claim 1, wherein: the damper is a hydraulic damper.

8. The vibration suppressing-harvesting energy integrating type energy harvesting system of claim 7, wherein: the connecting rod is a hydraulic rod.

9. The vibration-suppressing, energy-harvesting, integrated energy harvesting system of claim 1, wherein: the second coil surrounds the belleville spring group.

10. The vibration suppressing-energy harvesting integrated energy harvesting system of any one of claims 1-9, wherein: the disc spring packs are not in contact with the flexible housing.