Wind-induced vortex-induced vibration energy harvesting device and harvesting method

Abstract

The present application relates to the technical field of energy collection equipment, in particular to a wind-induced vortex-induced vibration energy collection device, comprising: a collection box, comprising a box body and a plurality of fixed top boxes, a partition plate is installed in the box body, and the partition plate divides the cavity of the box body into a plurality of collection cavities; a plurality of collection heads are used for guiding external wind power into the collection cavities of the box body; and a plurality of collection assemblies are used for collecting wind power and converting it into electric energy, the collection assembly comprises an interference part, a collection plate, an elastic plate, a power generation module and a storage battery, the collection plate is arranged in the collection cavity corresponding to the fixed top box, the elastic plate, the power generation module and the storage battery are all installed in the cavity of the fixed top box corresponding thereto, the interference part is arranged in the collection cavity, so that the wind in the collection cavity of the box body forms unstable force, and the interference part is located between the installation port and the collection plate, the instability of the wind is increased through the arrangement of the interference part, the vibration frequency is increased, and energy can be efficiently collected.

Description

Technical Field

[0001] This invention relates to the field of energy harvesting equipment technology, and in particular to an energy harvesting device for wind-induced vortex-induced vibration, and also to a harvesting method including the above-mentioned energy harvesting device for wind-induced vortex-induced vibration. Background Technology

[0002] In recent years, with the rapid development of wireless communication technology, wireless sensors have become an ideal choice for monitoring. This monitoring method has already seen some application and has good development prospects. As a key part of wireless sensor networks, wireless sensor nodes generally consist of four parts: data acquisition, data processing, data transmission, and power supply, each of which requires electricity. Wind energy is mainly generated by air movement, and its total reserves are enormous. As a renewable and clean energy source, it is widely distributed. Existing collection devices have slow collection speeds and low collection efficiency, failing to efficiently utilize wind energy, thus requiring large-scale deployment to effectively supply electricity.

[0003] Chinese patent CN113162470A discloses an energy harvesting device and method for wind-induced vortex-induced vibration. The two ends of an elastic beam are fixedly connected to opposite sides of two supporting columns. The oscillating device includes a flow barrier and an oscillating plate. One end of the oscillating plate is fixedly connected to the middle of the lower surface of the elastic beam, and the other end is fixedly connected to the flow barrier. While this method can achieve energy recovery and utilization, its efficiency is too low, and its cost would be high if deployed on a large scale. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the problem that the collection speed of the existing collection devices is slow, the collection efficiency is low, and the wind energy cannot be efficiently utilized, resulting in the need for large-scale deployment to effectively supply electricity. The present invention provides an energy collection device and method for wind-induced vortex-induced vibration.

[0005] The technical solution adopted by this invention to solve its technical problem is: an energy harvesting device for wind-induced vortex-induced vibration, comprising:

[0006] The collection box includes a box body and several fixed top boxes. A partition is installed inside the box body, which divides the cavity of the box body into several collection chambers. Several installation ports are opened on the front side wall of the collection box. Each installation port corresponds to a collection chamber and is connected to its corresponding collection chamber. Each collection chamber of the box body is connected to at least one fixed top box.

[0007] Several collection heads are used to guide the external wind force into the collection cavity of the box. The collection heads and the installation ports correspond one-to-one. The collection heads are connected to their corresponding installation ports through sleeves.

[0008] It also includes several collection components for collecting wind power and converting it into electrical energy. Each collection component corresponds to a fixed top-mount box. The collection components include interference components, collection plates, elastic plates, power generation modules, and storage batteries. The collection plates are arranged within the corresponding collection chambers of the fixed top-mount boxes, and the collection plates are capable of vibrating under wind conditions.

[0009] The elastic plate is installed on the inner wall of the fixed top box, and the elastic plate and the collecting plate are fixedly connected. The power generation module is installed on the elastic plate and is electrically connected to the storage battery. The power generation module is used to convert the vibration generated by the elastic plate into electrical energy. The elastic plate, the power generation module, and the storage battery are all installed in the cavity of their respective fixed top boxes.

[0010] Interference components are placed inside the collection chamber to create an unstable force in the airflow within the chamber. These components are located between the mounting port and the collection plate. By increasing the instability of the airflow through the interference components, the vibration frequency is increased, enabling energy to be collected efficiently.

[0011] To address the issue of low collection efficiency in the collection head, a funnel-shaped structure with a large inlet at the input and a small inlet at the output is further incorporated.

[0012] To address the issue of inconsistent performance when multiple collection heads are arranged side-by-side, the design further includes a first collection head, a second collection head, and a third collection head. The first and third collection heads are arranged along the Y-axis and are on the same straight line. The second collection head is located between the first and second collection heads and is arranged behind the first collection head along the X-axis, so that the wakes of the first and third collection heads converge at the second collection head.

[0013] To address the issue of weak interference effect of the interference component, the interference component is further designed with a triangular prism structure. When wind comes into contact with the interference component, it will periodically release linear vortices that rotate in opposite directions and are arranged in a regular pattern on its surface.

[0014] To address the issue of weak vibration generated by the collecting rod, which leads to low power generation efficiency, the collecting plate is further equipped with several through holes, creating a speed difference between the wind inside and outside the through holes.

[0015] One side of the collecting plate protrudes to form an angular section, which causes the wind to form a boundary layer after contacting the angular section.

[0016] To address the issue of low power generation efficiency due to weak vibration generated by the elastic plate, the elastic plate is further designed with a wavy strip structure.

[0017] To address the issue of weakened wind force entering the collection chamber due to the collection head not being aligned with the wind direction, a wind direction detection component is further included on the side of the collection box to detect the wind direction.

[0018] Furthermore, a support plate is arranged below the collection box, and the support plate is fixedly connected to the collection box by a support column.

[0019] This application also provides a method for collecting energy from a wind-induced vortex-induced vibration energy harvesting device, the method comprising:

[0020] S1. First, the external wind force is guided through the collecting head, so that the wind force enters the narrow sleeve from the collecting head, and then the wind force is sent into the collecting cavity of the collecting box through the sleeve.

[0021] S2. The wind entering the collection chamber is caused by the interference component to form an unstable force that acts on the collection plate. The shape of the collection plate can further increase the shaking frequency.

[0022] S3. When the collecting plate shakes, it will cause the elastic plate to shake. Energy is obtained through the vibration of the elastic plate and converted into electrical energy through the power generation module. This electrical energy is then stored in the battery and transported away.

[0023] S4. When the wind changes direction, it will exert a force on the wind direction detection component, causing the trigger switch of the wind direction detection component to be sensed and transmitted to the staff.

[0024] S5. The staff is controlled by a signal, or the signal is directly transmitted to the control module of the collection box, so that the control module adjusts the collection box to the corresponding wind direction to maximize energy collection.

[0025] The beneficial effects of the present invention are as follows: The energy harvesting device for wind-induced vortex vibration provided by the present invention can increase the collected air volume by setting the collection head, thereby increasing the collection range. The increased flow rate can increase the frequency and magnitude of the vibration of the elastic plate, thereby increasing the collection efficiency. Furthermore, the setting of the interference component increases the instability of the wind. Combined with the irregular shape of the collection plate, the vibration frequency is increased, enabling energy to be collected efficiently. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a partial structural diagram of the collection cavity of the collection box of the present invention;

[0029] Figure 3 This is the present invention. Figure 2 A partially enlarged structural diagram;

[0030] Figure 4 This is a schematic diagram of the structure of the collecting plate in this invention.

[0031] In the diagram: 1. Collection box, 11. Box body, 111. Collection chamber, 112. Installation port, 12. Fixed top box, 13. Partition, 14. Sleeve;

[0032] 2. Collection head; 21. First collection head; 22. Second collection head; 23. Third collection head;

[0033] 3. Collection component; 31. Interference component; 32. Collection plate; 321. Through hole; 322. Angular part; 33. Elastic plate; 34. Power generation module; 35. Storage battery.

[0034] 4. Wind direction detection component;

[0035] 5. Support plate, 51. Support column. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0037] like Figure 1 This is a schematic diagram of the structure of the present invention, an energy harvesting device for wind-induced vortex-induced vibration, comprising:

[0038] The collection box 1 includes a box body 11 and several fixed top boxes 12. A partition 13 is installed inside the box body 11, which divides the cavity of the box body 11 into several collection chambers 111. Two partitions 13 are installed inside the box body 11, which divide the cavity of the box body 11 into three collection chambers 111. Several installation ports 112 are opened on the front side wall of the collection box 1. Each collection chamber 111 corresponds to one installation port 112. The installation port 112 has a sleeve structure. The installation port 112 and the collection chamber 111 correspond one-to-one. The installation port 112 and its corresponding collection chamber 111 are connected. Each collection chamber 111 of the box body 11 is connected to at least one fixed top box 12. Each collection chamber 111 has two fixed top boxes 12 that are spaced apart along the X-axis.

[0039] The design of the fixed top box 12 can avoid the interference of the incoming wind on the vibration and deformation of the elastic plate 33. The superposition of wind disturbance and the vibration of the elastic plate 33 itself may affect the magnitude of the deformation of the elastic plate 33, thereby reducing the power generation efficiency. Furthermore, the cavity opened on the box body 11 that communicates with the fixed top box 12 has a cross-sectional area in the XY plane that is smaller than the cross-sectional area of ​​the fixed top box in the XY plane, which further reduces the impact of wind entering the fixed top box 12 on the elastic plate 33.

[0040] Several collection heads 2 are used to guide external wind to the collection chamber 111 of the box 11. The collection heads 2 and the mounting ports 112 correspond one-to-one. The collection heads 2 are connected to their corresponding mounting ports 112 through the sleeves 14. The sleeves 14 are inserted into their corresponding mounting ports 112. By setting the collection heads 2, the collected air volume can be increased, the collection range can be increased, and the frequency and magnitude of the vibration of the elastic plate can be increased by increasing the flow rate, thereby increasing the collection efficiency.

[0041] The collecting head 2 is a funnel-shaped structure with a large inlet at the input end and a small outlet at the output end, which increases the collecting efficiency. The constricting structure can compress the wind entering the collecting chamber 111, thereby increasing the wind intensity.

[0042] The X-axis is perpendicular to the Y-axis. The collecting head 2 includes a first collecting head 21, a second collecting head 22, and a third collecting head 23. The first collecting head 21 and the third collecting head 23 are arranged along the Y-axis and are on the same straight line. The second collecting head 22 is located between the first collecting head 21 and the second collecting head 23, and is arranged along the X-axis behind the first collecting head 21. This allows the tail currents of the first collecting head 21 and the third collecting head 23 to converge at the second collecting head 22. This reduces the space occupied by the device and allows the collecting head 2 installed at the rear end to make full use of the tail currents of the two collecting heads 2 at the front end, thus improving the collection efficiency.

[0043] There can be three or more collector heads 2, and two adjacent collector heads 2 are arranged one in front of the other. The collector head 2 located on the rear side can utilize the wake of the collector head 2 located on the front side, thereby increasing the wind power entering the collector head 2 located on the rear side and improving the power generation efficiency.

[0044] And several collection components 3, used to collect wind power and convert it into electrical energy. The collection components 3 correspond one-to-one with the fixed top box 12. The collection components 3 include interference components 31, collection plates 32, elastic plates 33, power generation modules 34 and storage batteries 35.

[0045] The collecting plate 32 is arranged in the collecting cavity 111 corresponding to the fixed top box 12. The main body of the collecting plate 32 is a parallelogram structure with circular holes. The collecting plate 32 can vibrate under wind. The collecting plate 32 has several through holes 321, so that there is a speed difference between the wind inside and outside the through holes 321. The through holes 321 are circular holes. When the airflow flows through the collecting plate 32 and through the through holes 321, there is a certain speed difference between the inside and outside of the through holes 321, which will lead to the intensification of the vibration of the collecting plate 32.

[0046] One side of the collecting plate 32 protrudes to form an angular portion 322, which causes the wind to form a boundary layer after contacting the angular portion 322. Since the airflow has a certain viscosity, when it comes into contact with the surface of the collecting plate 32 with angular shape features, the surrounding airflow will slow down, forming the so-called boundary layer. Subsequently, when the boundary layer separates from the collecting plate, vortices are formed, changing the pressure distribution along the surface of the collecting plate 32. When the vortex is not formed symmetrically around the object, it will generate different lift on each side of the object, interacting with the collecting plate 32 and thus inducing periodic irregular motion on the collecting plate 32.

[0047] The elastic plate 33 is installed on the inner wall of the fixed top box 12. The installation contact between the elastic plate 33 and the fixed top box 12 can be fixed by welding, bolting, snap-fitting, etc. This application does not make specific limitations on this. The elastic plate 33 and the collecting plate 32 are fixedly connected. The power generation module 34 is installed on the elastic plate 33 and is electrically connected to the storage battery 35. The power generation module 34 is used to convert the vibration generated by the elastic plate 33 into electrical energy. The elastic plate 33, the power generation module 34 and the storage battery 35 are all installed in the cavity of their corresponding fixed top box 12. The elastic plate 33 has a wavy strip structure, which can enhance the vibration of the elastic plate 33.

[0048] Interference element 31 is arranged inside collection chamber 111, causing the wind in collection chamber 111 of box 11 to form an unstable force. The instability of the wind is increased by setting interference element 31. Combined with the irregular shape of collection plate, the vibration frequency is increased, so that energy can be collected efficiently. Interference element 31 is located between mounting port 112 and collection plate 32. Interference element 31 has a triangular prism structure. When the wind comes into contact with interference element 31, it will periodically shed linear vortices with opposite rotation directions and arranged in a regular pattern on its surface. When the airflow passes around the interference element with angular shape, linear vortices with opposite rotation directions and arranged in a regular pattern will periodically shed from the surface of interference element 31. At first, the linear vortices maintain their own motion and move forward. Then they interfere with each other and attract each other. Moreover, the interference becomes larger and larger, forming a nonlinear vortex street. This vortex street will generate a periodic excitation force, thereby causing the structure of collection plate 32 to vibrate.

[0049] By adjusting the shapes of the interference element 31 and the collecting plate 32, the vibration frequency of the elastic plate 33 driven by the collecting plate 32 can be greatly increased, thereby improving the power generation efficiency.

[0050] The power generation module 34 can be a piezoelectric sheet, which can be an MFC piezoelectric ceramic fiber sheet. This application does not make a specific limitation in this regard. The MFC piezoelectric ceramic fiber sheet is pasted on the surface of the elastic plate 33. When the collecting plate 32 drives the elastic plate 33 to undergo vortex-induced vibration, the piezoelectric sheet on the upper surface reciprocates with the elastic plate 33 when the elastic plate 33 vibrates and deforms, generating alternating stress. Due to the positive piezoelectric effect, an alternating potential difference will be generated between the upper and lower surfaces of the piezoelectric sheet, thereby generating electrical energy stored in the storage battery 35 of the fixed top box 12.

[0051] The storage battery 35 is located inside the fixed top box 12, which can reduce its interference with wind in the collection chamber 111.

[0052] The side of the collection box 11 is equipped with a wind direction detection component 4 for detecting wind direction and sending signals. The wind direction detection component 4 is a wind direction detector that can remind staff to change the direction of the device when the wind direction changes, so that the device can be aligned with the position of the strongest wind.

[0053] A support plate 5 is arranged below the collection box 1. The support plate 5 is fixedly connected to the collection box 1 by a support column 51. A control module is installed on the bottom surface of the support plate 5. The control module can receive the signal sent by the wind direction detection component 4 and provide power for the rotation of the collection box 1. The control module includes a controller and a rotating seat.

[0054] The collecting head 2, the collecting cavity 111, and the collecting components 3 constitute a collecting unit, and multiple collecting components 3 can be arranged in a collecting unit.

[0055] This application also provides a method for collecting energy from a wind-induced vortex-induced vibration energy harvesting device, the method comprising:

[0056] S1. First, the external wind force is guided by the collecting head 2, so that the wind force enters the narrow sleeve 14 from the collecting head 2, and the wind force is sent into the collecting cavity 111 of the box body 11 of the collecting box 1 through the sleeve 14.

[0057] S2. The wind entering the collection chamber 111 is caused by the interference component 31 to form an unstable force that acts on the collection plate 32. The shape of the collection plate 32 can further increase the shaking frequency.

[0058] S3. When the collecting plate 32 vibrates, it will cause the elastic plate 33 to vibrate. Energy is obtained through the vibration of the elastic plate 33, which is converted into electrical energy by the power generation module 34 and then stored and transported away by the battery.

[0059] S4. When the wind changes direction, it will exert a force on the wind direction detection component 4, causing the wind direction detection component 4 to generate a signal and transmit it to the staff.

[0060] S5. The staff is controlled by a signal, or the signal is directly transmitted to the control module of the collection box 1, so that the control module adjusts the collection box 1 to the corresponding wind direction to maximize energy collection.

[0061] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An energy harvesting device for wind-induced vortex-induced vibration, characterized in that, include: The collection box (1) includes a box body (11) and several fixed top boxes (12). A partition (13) is installed inside the box body (11). The partition (13) divides the cavity of the box body (11) into several collection chambers (111). Several installation ports (112) are opened on the front side wall of the collection box (1). The installation ports (112) correspond one-to-one with the collection chambers (111). The installation ports (112) are connected to their corresponding collection chambers (111). The collection chambers (111) of the box body (11) are connected to at least one fixed top box (12). Several collection heads (2) are used to guide external wind force into the collection chamber (111) of the box body (11). The collection head (2) and the mounting port (112) correspond one-to-one. The collection head (2) and its corresponding mounting port (112) are connected. The collection head (2) includes a first collection head (21), a second collection head (22) and a third collection head (23). The first collection head (21) and the third collection head (23) are arranged along the Y-axis direction and are located on the same straight line. The second collection head (22) is located between the first collection head (21) and the second collection head (22). The second collection head (22) is arranged along the X-axis direction behind the first collection head (21) so that the wake of the first collection head (21) and the wake of the third collection head (23) converge at the second collection head (22). And several collection components (3) for collecting wind power and converting it into electrical energy. The collection components (3) correspond one-to-one with the fixed top box (12). The collection components (3) include interference components (31), collection plates (32), elastic plates (33), power generation modules (34), and storage batteries (35). The collecting plate (32) is arranged in the collecting cavity (111) corresponding to the fixed top box (12), and the collecting plate (32) can vibrate under wind force. The collecting plate (32) has several through holes (321) so that the wind inside and outside the through holes (321) has a speed difference. One side of the collecting plate (32) protrudes to form a corner (322), so that the wind forms a boundary layer after contacting the corner (322); The elastic plate (33) is installed on the inner wall of the fixed top box (12). The elastic plate (33) and the collecting plate (32) are fixedly connected. The power generation module (34) is installed on the elastic plate (33) and is electrically connected to the storage battery (35). The power generation module (34) is used to convert the vibration generated by the elastic plate (33) into electrical energy. The elastic plate (33), the power generation module (34) and the storage battery (35) are all installed in the cavity of their respective fixed top box (12). The interference element (31) is arranged in the collection chamber (111) to make the wind in the collection chamber (111) of the box (11) form an unstable force, and the interference element (31) is located between the mounting port (112) and the collection plate (32).

2. The energy harvesting device for wind-induced vortex-induced vibration as described in claim 1, characterized in that: The collecting head (2) is a funnel-shaped structure with a large inlet at the input end and a small inlet at the output end.

3. The energy harvesting device for wind-induced vortex-induced vibration as described in claim 1, characterized in that: The interference component (31) has a triangular prism structure. When the wind comes into contact with the interference component (31), it will periodically shed out linear vortices with opposite rotation directions and arranged in a regular pattern on its surface.

4. The energy harvesting device for wind-induced vortex-induced vibration as described in claim 1, characterized in that: The elastic plate (33) has a wavy strip structure.

5. The energy harvesting device for wind-induced vortex-induced vibration as described in claim 1, characterized in that: The collection box (1) has a wind direction detection component (4) installed on the side of the box body (11) for detecting the wind direction.

6. The energy harvesting device for wind-induced vortex-induced vibration as described in claim 1, characterized in that: A support plate (5) is arranged below the collection box (1), and the support plate (5) is fixedly connected to the collection box (1) by a support column (51).

7. A method for collecting energy from a wind-induced vortex-induced vibration energy harvesting device, characterized in that: Collection methods include: S1. First, the external wind force is guided through the collecting head (2) so that the wind force enters the narrow sleeve (14) from the collecting head (2) and is sent into the collecting chamber (111) of the box body (11) of the collecting box (1) through the sleeve (14); S2. The wind entering the collection chamber (111) is affected by the interference element (31), which causes the wind to form an unstable force that acts on the collection plate (32). The shape of the collection plate (32) can further increase the shaking frequency. S3. When the collecting plate (32) shakes, it will cause the elastic plate (33) to shake. Energy is obtained through the vibration of the elastic plate (33), which is converted into electrical energy through the power generation module (34) and then stored and transported by the battery. S4. When the wind changes direction, it will exert a force on the wind direction detection component (4), causing the wind direction detection component (4) to generate a signal and transmit it to the staff. S5. The staff is controlled by a signal, or the signal is directly transmitted to the control module of the collection box (1), so that the control module adjusts the collection box (1) to the corresponding wind direction to maximize energy collection.

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