Self-adaptive multi-scene piezoelectric energy harvester based on low-rigidity wave ring

Abstract

The invention provides a self-adaptive multi-scene piezoelectric energy harvester based on a low-rigidity wave ring, and belongs to the technical field of piezoelectric energy harvesting, the self-adaptive multi-scene piezoelectric energy harvester comprises an energy harvesting device, an integral shell is arranged above the exterior of the energy harvesting device, a mass block is arranged below the energy harvesting device, a self-adaptive device is arranged above the integral shell, and the mass block is arranged below the self-adaptive device. An energy capturing device is arranged below the mass block; the two ends of the energy capturing device are connected with the overall shell and the mass block respectively, the lower portion of the mass block is connected with the energy capturing device, and the upper portion of the overall shell is connected with the self-adaptive device. According to the self-adaptive multi-scene piezoelectric energy harvester based on the low-rigidity wave ring, various mechanical vibrations in the environment can be efficiently converted into electric energy, high flexibility and expandability are achieved, and through modular design and a stable fixing mode, the self-adaptive multi-scene piezoelectric energy harvester based on the low-rigidity wave ring can be widely applied to the field of piezoelectric energy harvesting. The problems that a traditional piezoelectric energy harvester is low in energy utilization rate and poor in adaptability in a complex and changeable environment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric energy harvesting, and in particular to an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring. Background Art

[0002] A piezoelectric energy harvester utilizes the direct piezoelectric effect of piezoelectric materials to generate electrical energy by deforming the piezoelectric materials. With the continuous growth of global energy demand and the improvement of environmental protection awareness, the development of efficient and clean energy technologies has become one of the key points in current scientific and technological development. As a device that can convert mechanical vibrations or pressures in the environment into electrical energy, the piezoelectric energy harvester has broad application prospects.

[0003] With the rapid development of the Internet of Things, wireless sensor networks, and portable electronic devices, the demand for distributed energy supply is increasing day by day. Although traditional piezoelectric energy harvesters can convert mechanical vibration energy in the environment into electrical energy, they have many limitations in practical applications: First, traditional piezoelectric energy harvesters are usually large in size and complex in structure, which makes the cost of traditional piezoelectric energy harvesters high and maintenance difficult; Second, the number of piezoelectric ceramic sheets contained in traditional piezoelectric energy harvesters is small, and the utilization rate of environmental energy is generally low; Third, traditional piezoelectric energy harvesters often can only harvest energy from a single energy source (such as mechanical vibrations at a specific frequency or environmental excitation in a specific direction) and cannot adapt to complex and changing environmental conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring, which can efficiently convert various mechanical vibrations in the environment into electrical energy, has high flexibility and scalability, and solves the problems of low energy utilization rate and poor adaptability of traditional piezoelectric energy harvesters in complex and changing environments through modular design and stable fixing methods.

[0005] To achieve the above purpose, the present invention provides an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring, including an energy harvesting device. An overall housing is provided above the energy harvesting device externally, a mass block is provided below the energy harvesting device, an adaptive device is provided above the overall housing, and an energy capturing device is provided below the mass block; both ends of the energy harvesting device are respectively connected to the overall housing and the mass block, the mass block is connected to the energy capturing device below, and the overall housing is connected to the adaptive device above.

[0006] Preferably, the energy capturing device includes an arc panel, a third nut, and a pull rod. The pull rod is connected to the mass block by a thread, the lower end of the pull rod penetrates through the arc panel, and the arc panel is fixedly connected to the pull rod by the third nut.

[0007] Preferably, the energy harvesting device includes a low-stiffness wave ring group, an arc-shaped piezoelectric ceramic sheet, and a planar piezoelectric ceramic sheet. The low-stiffness wave ring group is divided into an arc part and a planar part. The arc-shaped piezoelectric ceramic sheet is disposed on the arc part, and the planar piezoelectric ceramic sheet is disposed on the planar part.

[0008] Preferably, the adaptive device includes a lifting ring. A lifting ring housing and a bearing are disposed outside the lifting ring. The bearing is disposed between the lifting ring and the lifting ring housing. A positioning bolt is disposed on the lifting ring housing. A first nut is disposed below the positioning bolt. The lifting ring housing is connected to the overall housing through the positioning bolt and the first nut.

[0009] Preferably, a first washer is disposed above the bearing, a second washer is disposed below the bearing, and a second nut is disposed below the second washer. A through hole is formed in the lifting ring housing. The lifting ring sequentially passes through the lifting ring housing, the first washer, the bearing, the second washer, and the second nut. The bearing is connected to the lifting ring housing through the first washer, and the bearing is connected to the second nut through the second washer.

[0010] Preferably, the adaptive device further includes a balance wing, and the balance wing is connected to the overall housing.

[0011] Preferably, the upper end of the low-stiffness wave ring group is connected to the overall housing, and the lower end of the low-stiffness wave ring group is connected to the mass block.

[0012] Preferably, a clearance fit is provided between the lifting ring and the lifting ring housing, and the bottom of the lifting ring does not contact the overall housing.

[0013] Therefore, the present invention adopts the above-mentioned adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring, and the technical effects are as follows: 1. High-efficiency energy conversion: By adopting a low-stiffness wave ring design and combining an arc-shaped piezoelectric ceramic sheet and a planar piezoelectric ceramic sheet, mechanical vibration in the environment can be more effectively converted into electrical energy; the low-stiffness wave ring is easy to deform, thereby increasing the deformation degree of the piezoelectric material and further improving the energy conversion efficiency.

[0014] 2. Adaptive multi-scenario: The design of the adaptive device enables the device to adapt to a variety of different vibration environments and energy sources.

[0015] 3. Modularity and scalability: The energy harvesting device, the energy capturing device, and the adaptive device all adopt a modular design, making the device easy to maintain and adjust in practical applications; the number and position of the low-stiffness wave ring group and the piezoelectric ceramic sheets can be adjusted according to actual needs, thereby achieving a high degree of scalability.

[0016] 4. Reducing Costs and Maintenance Difficulty: Compared with traditional piezoelectric energy harvesters, the present invention adopts a more concise and compact structural design, reducing the manufacturing cost and maintenance difficulty. Description of the Drawings

[0017] Figure 1 7 / 8 sectional view of an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring according to the present invention; Figure 2 Half-sectional view of an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring according to the present invention; Figure 3 Exploded view of an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring according to the present invention; Figure 4 Top view of an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring according to the present invention; Figure 5 Schematic diagram of the energy harvesting device according to the present invention; Figure 6 Schematic diagram of the lifting ring part of the adaptive device according to the present invention; Figure 7 Schematic diagram of the energy capturing device according to the present invention.

[0018] Reference Signs 1. Arc panel; 2. Tie rod; 3. Mass block; 4. Integral housing; 5. Low-stiffness wave ring group; 6. Lifting ring housing; 7. Bearing; 8. Lifting ring; 9. First washer; 10. Second washer; 11. Positioning bolt; 12. Second nut; 13. First nut; 14. Arc surface piezoelectric ceramic sheet; 15. Plane piezoelectric ceramic sheet; 16. Balance wing; 17. Third nut. Detailed Embodiments

[0019] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs.

[0021] Embodiment 1 As Figures 1 - 4 shown, the present invention provides an adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring, including an energy harvesting device. An integral housing 4 is arranged above the outside of the energy harvesting device, a mass block 3 is arranged below the energy harvesting device, an adaptive device is arranged above the integral housing 4, and an energy capturing device is arranged below the mass block 3; both ends of the energy harvesting device are respectively connected to the integral housing 4 and the mass block 3, the mass block 3 is connected to the energy capturing device below, and the integral housing 4 is connected to the adaptive device above.

[0022] The piezoelectric energy harvester of the present invention mainly consists of five major parts: an energy harvesting device, an overall housing 4, a mass block 3, an energy capturing device, and an adaptive device. The energy harvesting device is located inside the overall housing 4, and its upper and lower ends are respectively connected to the overall housing 4 and the mass block 3; the mass block 3 is located below the energy harvesting device and is fixed and excited through the energy capturing device; the adaptive device is arranged above the overall housing 4 and is used to adjust the attitude and stability of the energy harvester.

[0023] As Figure 5 shown, the energy harvesting device includes a low-stiffness wave ring group 5, a curved piezoelectric ceramic sheet 14, and a planar piezoelectric ceramic sheet 15. The upper end of the low-stiffness wave ring group 5 is connected to the overall housing 4, and the lower end of the low-stiffness wave ring group 5 is connected to the mass block 3. Four low-stiffness wave ring groups 5 are placed above the mass block 3 and connected by epoxy resin glue or other methods such as welding. Each low-stiffness wave ring group 5 is composed of 6 low-stiffness waves 5 and is connected by epoxy resin glue or other methods such as welding. The size and quantity of the low-stiffness waves can be adjusted according to the actual situation. The quantity of the low-stiffness wave ring groups 5 and the distance between the low-stiffness wave ring groups 5 can be adjusted according to the actual situation.

[0024] The low-stiffness wave ring group 5 is divided into a curved surface part and a planar part. The curved piezoelectric ceramic sheet 14 is arranged on the curved surface part, and the planar piezoelectric ceramic sheet 15 is arranged on the planar part. Each low-stiffness wave ring group 5 has 12 curved piezoelectric ceramic sheets 14 and 12 planar piezoelectric ceramic sheets 15, which are connected by epoxy resin glue or other methods such as welding. The quantity and size of the piezoelectric ceramic sheets can be adjusted according to the actual situation. When the mass block 3 is excited by the outside world, a tensile force is generated on the lower end of the low-stiffness wave ring group 5. The upper end of the low-stiffness wave ring group 5 is fixedly connected to the overall housing 4. Under the interaction of the two, the low-stiffness wave ring group 5 deforms, and then the curved piezoelectric ceramic sheet 14 and the planar piezoelectric ceramic sheet 15 deform, thereby generating electrical energy through the direct piezoelectric effect.

[0025] As Figure 6 shown, the adaptive device consists of a lifting ring 8, a lifting ring housing 6, a bearing 7, a positioning bolt 11, a first nut 13, a first washer 9, a second washer 10, and a second nut 12. A lifting ring housing 6 and a bearing 7 are arranged on the outside of the lifting ring 8. The bearing 7 is arranged between the lifting ring 8 and the lifting ring housing 6. The lifting ring 8 is connected to the lifting ring housing 6 through the bearing 7, realizing the rotational freedom of the lifting ring 8. The positioning bolt 11 and the first nut 13 are arranged on the lifting ring housing 6. The lifting ring housing 6 is connected to the overall housing 4 through the positioning bolt 11 and the first nut 13.

[0026] A first washer 9 and a second washer 10 are respectively arranged on the upper and lower sides of the bearing 7 to protect the bearing 7 and prevent it from loosening. A second nut 12 is arranged below the second washer 10. A through hole is provided on the suspension ring housing 6. The suspension ring 8 passes through the suspension ring housing 6, the first washer 9, the bearing 7, the second washer 10, and the second nut 12 in sequence. The second nut 12 is used to fix the position of the suspension ring 8.

[0027] The adaptive device further includes a balance wing 16 connected to the overall housing 4 to improve the stability and attitude adjustment ability of the energy harvester. To further improve the adaptive ability of the energy harvester, a clearance fit is adopted between the suspension ring 8 and the suspension ring housing 6 to ensure that the suspension ring 8 can rotate and move freely when subjected to external excitation, thereby adjusting the attitude and position of the energy harvester. At the same time, the bottom of the suspension ring 8 does not contact the overall housing 4, avoiding energy loss caused by friction.

[0028] In addition, the size of the suspension ring 8 can be adjusted according to the actual situation. The balance wing 16 is placed on the outside of the overall housing 4 and connected by epoxy resin glue or other methods such as welding. The shape and size of the balance wing 16 and the distance between the balance wing 16 and the balance wing 16 can be adjusted according to the actual situation.

[0029] As Figure 7 shown, the energy capture device includes an arc panel 1, a third nut 17, and a pull rod 2. The pull rod 2 is connected to the mass block 3 by threads. The lower end of the pull rod 2 penetrates through the arc panel 1. The arc panel 1 is fixedly connected to the pull rod 2 by the third nut 17. The mass block 3 is placed above the pull rod 2 and fixed by threads. When an external excitation acts on the arc panel 1, a tensile force is applied to the mass block 3 through the pull rod 2, causing the low-stiffness wave ring group 5 to deform, and then generating electric energy through the direct piezoelectric effect. The size of the mass block 3 is adjusted according to the actual situation, thereby adjusting the tensile force on the low-stiffness wave ring group 5.

[0030] Install this device in areas rich in wind energy or tidal energy. When an external excitation acts on the arc panel 1, a tensile force is applied to the mass block 3 through the pull rod 2. The energy captured by the arc panel 1 will be further transmitted to the low-stiffness wave ring group 5 through the pull rod, causing it to deform and drive the piezoelectric ceramic sheet to generate electric energy. At the same time, the suspension ring 8 and the balance wing 16 in the adaptive device will make adaptive adjustments according to the direction and magnitude of the external excitation to ensure that the energy harvester can maintain a stable attitude and capture energy maximally. In addition, due to the design of the low-stiffness wave ring group 5 having high flexibility and deformation ability, it can adapt to excitations in different directions and magnitudes, thereby improving the multi-scenario adaptability of the energy harvester.

[0031] Therefore, the present invention adopts the above-mentioned adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring. By combining the low-stiffness wave ring design with piezoelectric ceramic sheets, efficient energy conversion is achieved, significantly improving the conversion efficiency from mechanical vibration to electrical energy. The design of its adaptive device enables the device to flexibly adapt to various vibration environments and energy sources. The modular and scalable design not only facilitates maintenance and adjustment but also allows the number and position of components to be adjusted according to actual needs. In addition, the simple and compact structure design reduces the manufacturing cost and maintenance difficulty, having significant advantages compared with traditional piezoelectric energy harvesters.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An adaptive multi-scenario piezoelectric energy harvester based on a low-stiffness wave ring, characterized in that: It comprises an energy capture device, wherein an integral shell is arranged above the outside of the energy capture device, a mass block is arranged below the energy capture device, an adaptive device is arranged above the integral shell, and an energy capture device is arranged below the mass block; two ends of the energy capture device are respectively connected to the integral shell and the mass block, the mass block is connected to the energy capture device below, and the integral shell is connected to the adaptive device above.

2. According to claim 1, the adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring is characterized in that: The energy capture device comprises an arc panel, a third nut and a pull rod, wherein the pull rod is connected to the mass block via a thread, the lower end of the pull rod passes through the arc panel, and the arc panel is fixedly connected to the pull rod via the third nut.

3. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 1 is characterized in that: The energy capture device includes a low-rigidity wave ring group, a curved piezoelectric ceramic sheet and a flat piezoelectric ceramic sheet. The low-rigidity wave ring group is divided into a curved surface part and a flat surface part. The curved surface part is provided with a curved piezoelectric ceramic sheet, and the flat surface part is provided with a flat piezoelectric ceramic sheet.

4. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 1 is characterized in that: The adaptive device includes a lifting ring, a lifting ring shell and a bearing are arranged on the outside of the lifting ring, the bearing is arranged between the lifting ring and the lifting ring shell, a positioning bolt is arranged on the lifting ring shell, a first nut is arranged below the positioning bolt, and the lifting ring shell is connected to the overall shell through the positioning bolt and the first nut.

5. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 4 is characterized in that: A first washer is arranged above the bearing, a second washer is arranged below the bearing, a second nut is arranged below the second washer, a through hole is opened on the lifting ring shell, the lifting ring passes through the lifting ring shell, the first washer, the bearing, the second washer, and the second nut in sequence, the bearing is connected to the lifting ring shell through the first washer, and the bearing is connected to the second nut through the second washer.

6. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 1 is characterized in that: The adaptive device further comprises a balancing wing connected to the integral housing.

7. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 3 is characterized in that: The upper end of the low-rigidity wave ring group is connected to the overall shell, and the lower end of the low-rigidity wave ring group is connected to the mass block.

8. The adaptive multi-scenario piezoelectric energy harvester based on a low-rigidity wave ring according to claim 4, characterized in that: The lifting ring and the lifting ring shell are clearance-fitted, and the bottom of the lifting ring does not contact the overall shell.

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