A vortex-induced vibration power generation device

Abstract

The present invention discloses a vortex-induced vibration power generation device, which relates to a renewable energy power generation device and includes multiple energy capture modules, each of which includes a vibration assembly and a power generation assembly. Each vibration assembly includes a bluff body connected to the power generation assembly, which is configured to interact with a fluid and, under the action of the fluid, drive the power generation assembly to vibrate, thereby generating electricity. At least two of the bluff bodies have different natural vibration frequencies. The vortex-induced vibration power generation device provided by the present invention is highly adaptable to fluids of varying flow rates.

Description

Technical Field

[0001] The present invention relates to a renewable energy power generation device, in particular to a vortex-induced vibration power generation device. Background Art

[0002] When a fluid passes through a bluff body, such as a cylinder, periodic alternating vortices are generated in its wake. Each vortex contains energy and separates from the bluff body before flowing into the fluid flow, thereby causing the bluff body separated from it or the object entering downstream to move. The energy collected from such movement is called "vortex-induced vibration energy".

[0003] Conventionally, tidal energy is obtained by utilizing the vortex-induced vibration phenomenon of a single cylinder. For example, patent CN106870269B provides a tidal energy and vortex-induced vibration energy integrated power generation device, which captures tidal energy by generating vortex-induced vibration through a single pile foundation and an oscillator. However, the vortex-induced vibration energy capture device provided by this patent can only adapt to fluids with a specific flow rate during use, and has poor adaptability. Summary of the Invention

[0004] The purpose of the present invention is to provide a vortex-induced vibration power generation device to solve the problems existing in the above-mentioned prior art and have strong adaptability to fluids with different flow rates.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a vortex-induced vibration power generation device, comprising a plurality of energy capture modules, each of the energy capture modules comprising a vibration component and a power generation component, each of the vibration components comprising a non-streamlined body component, the non-streamlined body component being connected to the power generation component, the non-streamlined body component being used to meet the fluid and drive the power generation component to vibrate under the action of the fluid so that the power generation component generates electricity; at least two of the non-streamlined body components have different natural vibration frequencies.

[0007] Preferably, each of the non-streamlined body components includes a first non-streamlined body, each of the first non-streamlined bodies has a circular arc surface and two rectangular planes connected to each other along the circumferential direction, the circular arc surface of each of the first non-streamlined bodies is used to meet the fluid, and each of the first non-streamlined bodies can vibrate and transmit it to the corresponding power generation component; at least two of the first non-streamlined bodies have different natural vibration frequencies.

[0008] Preferably, each of the non-streamlined body components also includes a second non-streamlined body, which has a circular arc surface and two rectangular planes along the circumferential direction, and the circular arc surface of each second non-streamlined body is used to meet the fluid; the upper end surface of the second non-streamlined body is fixedly connected to the power generation component, and the lower end surface of the second non-streamlined body is fixedly connected to the upper end surface of the first non-streamlined body, and the first non-streamlined body and the second non-streamlined body can vibrate synchronously and transmit to the corresponding power generation component; the first non-streamlined body and the second non-streamlined body of each non-streamlined body component have different natural vibration frequencies.

[0009] Preferably, it also includes a base, and each of the vibration components also includes a vertically arranged swinging member, the base is used to be fixedly arranged on a fixed surface, the lower end of each swinging member is fixedly connected to the base, and the upper end is fixedly connected to the lower end of the non-streamlined body component, and the swinging member can swing with the non-streamlined body component.

[0010] Preferably, the power generation component is located above the non-streamlined body component, and the power generation component includes a box body, a sliding component, a first friction power generation sheet and a second friction power generation sheet. The sliding component is movably arranged in the box body and can slide relative to the box body along the first direction. The first friction power generation sheet is placed on an end face of the sliding component in the first direction, and the second friction power generation sheet is placed on the inner wall surface of the box body opposite to the first friction power generation sheet; the bottom of the box body is fixedly connected to the top of the non-streamlined body component; the non-streamlined body component is used to drive the box body to vibrate under the action of the fluid and make the sliding component slide relative to the box body, so that the first friction power generation sheet and the second friction power generation sheet contact or separate.

[0011] Preferably, the power generation component also includes a third friction power generation sheet and a fourth friction power generation sheet. The third friction power generation sheet is placed on the end face of the sliding component opposite to the first friction power generation sheet, and the fourth friction power generation sheet is placed on the inner wall surface of the box body opposite to the second friction power generation sheet. The non-streamlined body component is used to drive the box body to vibrate under the action of the fluid and make the sliding component slide relative to the box body, so that the third friction power generation sheet and the fourth friction power generation sheet are in contact or separated.

[0012] Preferably, a slide rail along the first direction is fixedly provided in the box body, and the first direction is located on a horizontal plane and perpendicular to the flow direction of the fluid; the sliding component is slidably connected to the slide rail and can slide relative to the slide rail along the first direction.

[0013] Preferably, the sliding component includes a sliding box and an impact ball movably arranged in the sliding box, and the sliding box is slidably connected to the sliding rail.

[0014] Preferably, the box body and the sliding box are both configured as waterproof and sealed boxes.

[0015] Preferably, it further comprises an electric energy collection module, each of the power generation components is independently electrically connected to the electric energy collection module, and the electric energy collection module is used to collect the electric energy of each of the power generation components.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The vortex-induced vibration power generation device provided by the present invention places the device in a fluid, so that the non-streamlined parts of each vibration component meet the fluid, the fluid passes through the non-streamlined parts to cause the non-streamlined parts to vibrate, and the vibration is transmitted to the power generation component to generate electricity, thereby realizing the capture of vortex-induced vibration energy; and because the natural vibration frequencies of at least two non-streamlined parts are different, the non-streamlined parts with different natural vibration frequencies can resonate under fluids with different flow rates to generate vortex-induced vibrations to capture and utilize the fluid energy, and the adaptability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the axonometric structure of the vortex-induced vibration power generation device provided in Example 1;

[0020] Figure 2 A schematic diagram of the coordinated structure of the vibration assembly, power generation assembly, and base provided in Example 1;

[0021] Figure 3 A schematic diagram of the exploded structure of the box body and power generation assembly provided in Example 1;

[0022] Figure 4 A schematic top view of the box body (without the closing cover) and the power generation assembly provided in Example 1;

[0023] Figure 5 This is a top view of the vortex-induced vibration power generation device (without the power generation component) provided in Example 1 in use.

[0024] Icons: 1- vortex-induced vibration power generation device; 10- energy capture module; 11- vibration assembly; 110- non-streamlined body component; 111- first non-streamlined body; 112- second non-streamlined body; 113- swinging member; 114- wildebeest connector; 12- power generation assembly; 121- box body; 122- sliding member; 1221- sliding box; 1222- impact ball; 123- first friction power generation sheet; 124- second friction power generation sheet; 125- third friction power generation sheet; 126- fourth friction power generation sheet; 127- slide rail; 128- limit plate; 129- closing cover; 20- base. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a vortex-induced vibration power generation device to solve the problems existing in the above-mentioned prior art and have strong adaptability to fluids with different flow rates.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] This embodiment provides a vortex-induced vibration power generation device 1, see Figure 1-Figure 5 , specifically including multiple energy capture modules 10, each energy capture module 10 includes a vibration component 11 and a power generation component 12, each vibration component 11 includes a non-streamlined body part 110, the non-streamlined body part 110 is connected to the power generation component 12, the non-streamlined body part 110 is used to meet the fluid and drive the power generation component 12 to vibrate under the action of the fluid so that the power generation component 12 generates electricity; at least two non-streamlined body parts 110 have different natural vibration frequencies.

[0030] The vortex-induced vibration power generation device 1 is placed in a fluid, so that the non-streamlined parts 110 of each vibration component 11 meet the fluid. The fluid passes through the non-streamlined parts 110, causing the non-streamlined parts 110 to vibrate, and the vibration is transmitted to the power generation component 12 to generate electricity, thereby realizing the capture of vortex-induced vibration energy; and since the natural frequencies of at least two non-streamlined parts 110 are different, the non-streamlined parts 110 with different natural frequencies can resonate under fluids with different flow rates to generate vortex-induced vibrations to capture and utilize fluid energy, and have strong adaptability.

[0031] Specifically, the fluid may be a water flow or an air flow.

[0032] Specifically, the bluff body component 110 may have different sizes or materials so that the bluff body component 110 has different masses and thus different natural vibration frequencies.

[0033] In the solution provided in this embodiment, it is more preferred to refer to Figure 2 and Figure 5 Each bluff body component 110 includes a first bluff body 111. Each first bluff body 111 has a circular arc surface and two rectangular planes connected along the circumferential direction. The circular arc surface of each first bluff body 111 is used to meet the fluid. Each first bluff body 111 can vibrate and transmit the vibration to the corresponding power generation component 12. The bluff body with this structure can better capture fluid energy and has high energy capture efficiency (see Baoshou Zhang, Baowei Song, Zhaoyong Mao, Wenlong Tian, ​​Boyang Li. Numerical investigation on VIV energy harvesting of bluff bodies with different crosssections in tandem arrangement. Energy 2017; 133: 723-736. for details). At least two first bluff bodies 111 have different natural vibration frequencies, thereby adapting to fluids with different flow rates.

[0034] Specifically, the natural frequencies of each first bluff body 111 can be made different, thereby further improving the adaptability to fluids with different flow rates; the first bluff bodies 111 can have different natural frequencies by making the heights or inner diameters of the arc surfaces different and by using different materials to make the masses of the first bluff bodies 111 different. The first bluff bodies 111 can then have different natural frequencies.

[0035] In the solution provided in this embodiment, it is more preferred to refer to Figure 2 and Figure 5Each bluff body component 110 further includes a second bluff body 112. The second bluff body 112 has an arc surface and two rectangular planes along the circumferential direction. The arc surface of each second bluff body 112 is used to meet the fluid. The bluff body of this structure can better capture the fluid energy and has high energy capture efficiency. The upper end surface of the second bluff body 112 is fixedly connected to the power generation component 12, and the lower end surface of the second bluff body 112 is fixedly connected to the upper end surface of the first bluff body 111. The first bluff body 111 and the second bluff body 112 can vibrate synchronously. And it is transmitted to the corresponding power generation component 12; the first bluff body 111 and the second bluff body 112 of each bluff body component 110 have different natural vibration frequencies. If the first bluff body 111 undergoes vortex-induced vibration at the current flow rate, the first bluff body 111 drives the entire vibration component 11 to vibrate. If the second bluff body 112 undergoes vortex-induced vibration at the current flow rate, the second bluff body 112 drives the entire vibration component 11 to vibrate. In this way, a single vibration component 11 can also adapt to fluids with different flow rates, further improving the adaptability to fluid flow rates.

[0036] Specifically, by making the heights or inner diameters of the arc surfaces of the first bluff body 111 and the second bluff body 112 different, the masses of the first bluff body 111 and the second bluff body 112 are made different, so that the first bluff body 111 and the second bluff body 112 have different natural frequencies.

[0037] More preferably, the second bluff body 112 can be detachably fixedly connected to the first bluff body 111 and the power generation assembly 12, such as by plugging, so as to achieve vibration transmission.

[0038] In the solution provided in this embodiment, it is more preferred to refer to Figure 1 The vortex-induced vibration power generation device 1 provided in this embodiment also includes a base 20, and each vibration component 11 also includes a vertically arranged swinging member 113. The base 20 is used to be fixedly arranged on a fixed surface. The base 20 facilitates the fixation of the entire vortex-induced vibration power generation device 1; the lower end of each swinging member 113 is fixedly connected to the base 20, and the upper end is fixedly connected to the lower end of the non-streamlined body component 110, and the swinging member 113 can swing with the non-streamlined body component 110. The setting of the swinging member 113 can realize the vibration of the entire vibration component 11. Specifically, the swinging member 113 can be set as an elastic rod or a metal bar, and the two ends of the swinging member 113 can be detachably connected to the base 20 and the non-streamlined body component 110 through the wildebeest connector 114.

[0039] In the solution provided in this embodiment, it is more preferred to refer to Figure 3 and Figure 4The power generation component 12 is located above the non-streamlined body part 110. The power generation component 12 includes a box body 121, a sliding component 122, a first friction power generation sheet 123 and a second friction power generation sheet 124. The sliding component 122 is movably arranged in the box body 121 and can slide relative to the box body 121 along the first direction. The first friction power generation sheet 123 is placed on an end surface of the sliding component 122 in the first direction, and the second friction power generation sheet 124 is placed on the inner wall surface of the box body 121 opposite to the first friction power generation sheet 123; the bottom of the box body 121 is fixedly connected to the top of the non-streamlined body part 110; the non-streamlined body part 110 is used to drive the box body 121 under the action of the fluid. 21 vibrates and causes the sliding component 122 to slide relative to the box body 121, so that the first friction power generation sheet 123 and the second friction power generation sheet 124 are in contact or separated; wherein the box body 121 can vibrate synchronously under the drive of the non-streamlined body component 110, wherein the vibration direction is also along the first direction, since the sliding component 122 is movably arranged in the box body 121, while the box body 121 undergoes vibration displacement, the sliding component 122 passively slides in the box body 121 along the first direction, so that the first friction power generation sheet 123 and the second friction power generation sheet 124 are in contact or separated, thereby generating electricity, wherein the contact-separation power generation mode is a working mode of the friction nanogenerator.

[0040] In the solution provided in this embodiment, it is more preferred that the power generation component 12 further includes a third triboelectric power generation sheet 125 and a fourth triboelectric power generation sheet 126. The third triboelectric power generation sheet 125 is disposed on the end surface of the sliding component 122 opposite to the first triboelectric power generation sheet 123, and the fourth triboelectric power generation sheet 126 is disposed on the inner wall surface of the box body 121 opposite to the second triboelectric power generation sheet 124. The bluff body component 110 is used to drive the box body 121 to vibrate under the action of the fluid and cause the sliding component 122 to slide relative to the box body 121, so as to cause the third triboelectric power generation sheet 125 and the fourth triboelectric power generation sheet 126 to contact or separate. The third triboelectric power generation sheet 125 and the fourth triboelectric power generation sheet 126 are disposed symmetrically with the first triboelectric power generation sheet 123 and the second triboelectric power generation sheet 124. Since the sliding component 122 slides back and forth in the box body 121, both the two wall surfaces of the sliding component 122 in the first direction will contact and collide with the box body 121. Therefore, two sets of contact-separation power generation components are provided to improve energy conversion efficiency.

[0041] In the solution provided in this embodiment, it is more preferred to refer to Figure 3 A slide rail 127 is fixedly provided in the box body 121 along a first direction, and the first direction is located on a horizontal plane and perpendicular to the flow direction of the fluid; the sliding component 122 is slidably connected to the slide rail 127 and can slide relative to the slide rail 127 along the first direction. By setting the slide rail 127, the sliding component 122 can be restricted from sliding in the first direction.

[0042] Specifically, the bottom of the sliding component 122 can directly cooperate with the sliding rail 127 in the form of grooves and protrusions, that is, the sliding rail 127 partially extends into the groove at the bottom of the sliding component 122, thereby realizing sliding cooperation along the first direction; in addition, a limiting plate 128 can be detachably provided on both sides of the sliding rail 127, and the limiting plates 128 on both sides and the sliding rail 127 form a sliding groove along the first direction, and the sliding component 122 is located in the sliding groove, and the sliding component 122 slides in contact with the sliding rail 127, and the sliding component 122 is restricted from sliding in other directions by the limiting plate 128.

[0043] In the solution provided in this embodiment, it is more preferred to refer to Figure 3 The sliding component 122 includes a sliding box 1221 and an impact ball 1222 movably arranged in the sliding box 1221, wherein the size of the impact ball 1222 is smaller than the internal volume of the sliding box 1221, so that the impact ball 1222 can move in the sliding box 1221, wherein the two outer wall surfaces of the sliding box 1221 in the first direction are fixedly provided with a first friction power generation sheet 123 and a third friction power generation sheet 125; the sliding box 1221 is slidably connected to the slide rail 127, and the sliding box 1221 drives the impact ball 1222 to slide, and because the impact ball 1222 moves on the sliding rail The movable arrangement in the movable box 1221 allows the impact ball 1222 to generate an additional impact on the sliding box 1221, thereby increasing the impact speed of the sliding box 1221 on the box body 121, and thereby increasing the contact and separation speeds of the first friction power generation sheet 123 and the second friction power generation sheet 124, as well as the contact and separation speeds of the third friction power generation sheet 125 and the fourth friction power generation sheet 126. Since the output current of the contact-separation mode increases with the increase in the contact and separation of the two friction power generation sheets, the instantaneous output current of the power generation component 12 can be increased, thereby improving the energy conversion efficiency.

[0044] In the solution provided in this embodiment, preferably, the box body 121 and the sliding box 1221 are both configured as waterproof and sealed boxes to improve the protection performance; specifically, the box body 121 and the sliding box 1221 both include a detachable closing cover.

[0045] In the solution provided in this embodiment, it is more preferred that the vortex-induced vibration power generation device 1 provided in this embodiment also includes an electric energy collection module, and each power generation component 12 is independently electrically connected to the electric energy collection module. The electric energy collection module is used to collect the electric energy of each power generation component 12, that is, the first friction power generation sheet 123 and the second friction power generation sheet 124 as well as the third friction power generation sheet 125 and the fourth friction power generation sheet 126 are all electrically connected to the electric energy collection module.

[0046] More preferably, see Figure 1 and Figure 5 , Figure 5The direction of incoming flow is from right to left, and the up and down direction is the first direction, i.e., the vibration direction of the vibration component 11; the energy capture module 10 can be set to six, and the six power generation components 12 are independently electrically connected to the power collection module. As long as one energy capture module 10 is working, power collection can be achieved; the six energy capture modules 10 are arranged in a regular hexagon, and the natural vibration frequencies of the six groups of non-streamlined body components 110 can be set to be different, which further improves the adaptability to flow velocity and energy capture efficiency.

[0047] Specifically, the number, arrangement and order of the multiple energy capture modules 10 can be determined according to actual needs; the power collection module can be set as a storage device or directly transmit the power of the power generation component 12 to the power-consuming equipment.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A vortex-induced vibration power generation device, characterized in that: The invention comprises a plurality of energy capture modules (10), each of the energy capture modules (10) comprises a vibration component (11) and a power generation component (12), each of the vibration components (11) comprises a non-streamlined body component (110), the non-streamlined body component (110) is connected to the power generation component (12), the non-streamlined body component (110) is used to meet the fluid and drive the power generation component (12) to vibrate under the action of the fluid so that the power generation component (12) generates electricity; at least two of the non-streamlined body components (110) have different natural vibration frequencies; each of the non-streamlined body components (110) comprises a first non-streamlined body (111) and a second non-streamlined body (112), and the first non-streamlined body (111) and the second non-streamlined body (112) of each non-streamlined body component (110) have different natural vibration frequencies.

2. The vortex-induced vibration power generation device according to claim 1, characterized in that: Each of the first bluff bodies (111) has a circular arc surface and two rectangular planes connected to each other along the circumferential direction, and the circular arc surface of each of the first bluff bodies (111) is used to meet the fluid. Each of the first bluff bodies (111) can vibrate and transmit the vibration to the corresponding power generation component (12); at least two of the first bluff bodies (111) have different natural vibration frequencies.

3. The vortex-induced vibration power generation device according to claim 2, characterized in that: The second bluff body (112) has an arc surface and two rectangular planes along the circumferential direction, and the arc surface of each second bluff body (112) is used to meet the fluid; the upper end surface of the second bluff body (112) is fixedly connected to the power generation component (12), and the lower end surface of the second bluff body (112) is fixedly connected to the upper end surface of the first bluff body (111), and the first bluff body (111) and the second bluff body (112) can vibrate synchronously and transmit to the corresponding power generation component (12).

4. The vortex-induced vibration power generation device according to claim 1, characterized in that: It also includes a base (20), and each of the vibration components (11) further includes a vertically arranged swinging member (113), the base (20) being used to be fixedly arranged on a fixed surface, the lower end of each of the swinging members (113) being fixedly connected to the base (20), and the upper end being fixedly connected to the lower end of the non-streamlined body component (110), and the swinging member (113) being able to swing along with the non-streamlined body component (110).

5. The vortex-induced vibration power generation device according to claim 1, characterized in that: The power generation component (12) is located above the non-streamlined body component (110), and the power generation component (12) includes a box body (121), a sliding component (122), a first friction power generation sheet (123) and a second friction power generation sheet (124). The sliding component (122) is movably arranged in the box body (121) and can slide relative to the box body (121) along a first direction. The first friction power generation sheet (123) is placed on an end face of the sliding component (122) in the first direction. Two friction power generation sheets (124) are placed on the inner wall surface of the box body (121) opposite to the first friction power generation sheet (123); the bottom of the box body (121) is fixedly connected to the top of the non-streamline body component (110); the non-streamline body component (110) is used to drive the box body (121) to vibrate and make the sliding component (122) slide relative to the box body (121) under the action of the fluid, so that the first friction power generation sheet (123) and the second friction power generation sheet (124) are in contact or separated.

6. The vortex-induced vibration power generation device according to claim 5, characterized in that: The power generation component (12) further includes a third friction power generation sheet (125) and a fourth friction power generation sheet (126), wherein the third friction power generation sheet (125) is disposed on the end face of the sliding component (122) opposite to the first friction power generation sheet (123), and the fourth friction power generation sheet (126) is disposed on the inner wall face of the box body (121) opposite to the second friction power generation sheet (124), and the non-streamlined body component (110) is used to drive the box body (121) to vibrate and to make the sliding component (122) slide relative to the box body (121) under the action of the fluid, so as to make the third friction power generation sheet (125) and the fourth friction power generation sheet (126) contact or separate.

7. The vortex-induced vibration power generation device according to claim 6, characterized in that: A slide rail (127) is fixedly provided in the box body (121) along the first direction, wherein the first direction is located on a horizontal plane and is perpendicular to the flow direction of the fluid; the sliding component (122) is slidably connected to the slide rail (127) and can slide relative to the slide rail (127) along the first direction.

8. The vortex-induced vibration power generation device according to claim 7, characterized in that: The sliding component (122) comprises a sliding box (1221) and an impact ball (1222) movably arranged in the sliding box (1221), and the sliding box (1221) is slidably connected to the sliding rail (127).

9. The vortex-induced vibration power generation device according to claim 8, characterized in that: The box body (121) and the sliding box (1221) are both configured as waterproof and sealed boxes.

10. The vortex-induced vibration power generation device according to claim 1, characterized in that: It also includes an electric energy collection module, each of the power generation components (12) is independently electrically connected to the electric energy collection module, and the electric energy collection module is used to collect the electric energy of each of the power generation components (12).

Images