A fluid energy capture device

Abstract

The present invention discloses a fluid energy capture device, which relates to an energy collection device and includes a floating shell, a movable component, multiple first elastic components, and multiple piezoelectric units. The floating shell has a sealed cavity, is disposed in a fluid, and can move with the fluid. The movable component is disposed in the sealed cavity. Each first elastic component is disposed within the sealed cavity, and its two ends are fixedly connected to the outer wall of the movable component and the inner wall of the floating shell, respectively. The floating shell moves with the fluid and can drive the movable component to move relative to the floating shell within the sealed cavity, causing the multiple first elastic components to undergo elastic deformation. Each first elastic component is fixedly provided with at least one piezoelectric unit. The elastic deformation of the first elastic component can drive the corresponding piezoelectric unit to deform and generate electricity. The fluid energy capture device provided by the present invention can improve energy capture efficiency.

Description

Technical Field

[0001] The present invention relates to an energy collection device, and in particular to a fluid energy capture device. Background Art

[0002] In recent years, with the rapid development of integrated circuits and micro-electromechanical systems, the demand for wireless sensors has been increasing. However, traditional wireless sensor power supply methods represented by chemical batteries have many disadvantages such as short service life, high maintenance costs and environmental problems. Using fluid energy such as water wave energy to generate electricity is a very promising and valuable way to solve the global energy crisis. The piezoelectric effect is a typical method of collecting fluid energy such as water wave energy. The piezoelectric effect refers to the phenomenon that when certain dielectrics such as piezoelectric sheets are deformed under the action of external forces, charge accumulation and voltage will occur on the surfaces of both sides of the dielectric. Therefore, the piezoelectric effect can be used to capture fluid energy such as water wave energy. For example, patent CN203457078U provides a blade-type piezoelectric power generation device, which converts the kinetic energy of air or water flow into the kinetic energy of the rotation of the shaft, thereby driving the rotation of the rotor and the blade, and then driving the movement of the elastic ball, so that the forced motion of the elastic ball impacts the piezoelectric vibrator fixed to the ring to generate vibration, and its piezoelectric unit produces periodic deformation, outputs charge, and realizes electromechanical energy conversion; however, the device can only capture the fluid energy in a specific direction that enables the blade to rotate, and the energy capture efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide a fluid energy capture device to solve the problems existing in the above-mentioned prior art and to improve the energy capture efficiency.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a fluid energy capture device, comprising a floating shell, a movable component, a plurality of first elastic components and a plurality of piezoelectric units; the floating shell has a sealed cavity, the floating shell is used to be set in a fluid and can move with the fluid; the movable component is set in the sealed cavity; each of the first elastic components is set in the sealed cavity, and the two ends of each of the first elastic components are fixedly connected to the outer wall surface of the movable component and the inner wall surface of the floating shell respectively, the floating shell moves with the fluid, and can drive the movable component to move relative to the floating shell in the sealed cavity to elastically deform the plurality of first elastic components; at least one piezoelectric unit is fixedly set on each of the first elastic components, and the elastic deformation of the first elastic component can drive the corresponding piezoelectric unit to deform to generate electricity.

[0006] Preferably, the number of the first elastic components is set to six, and the plurality of first elastic components are evenly distributed in the space between the movable component and the floating shell.

[0007] Preferably, it also includes a friction nano-power generation component and a second elastic component. The movable component has a receiving cavity, and the friction nano-power generation component and the second elastic component are arranged in the receiving cavity; the friction nano-power generation component includes a movable friction unit and a fixed friction unit, and the fixed friction unit is fixedly arranged in the receiving cavity. The two ends of the second elastic component can be fixedly connected to the movable friction unit and the inner wall of the movable component respectively; the second elastic component can undergo elastic deformation during the movement of the movable component and can drive the movable friction unit close to or away from the fixed friction unit so that the movable friction unit contacts or separates from the fixed friction unit and generates electricity.

[0008] Preferably, the friction nano-power generation component and the second elastic component are each provided in two pieces, an intermediate fixed plate is fixedly provided in the movable component, and a friction nano-power generation component and a second elastic component are provided on both sides of the intermediate fixed plate, and the two fixed friction units of the two friction nano-power generation components are respectively fixedly connected to the two side surfaces of the intermediate fixed plate.

[0009] Preferably, each of the movable friction units includes a movable support plate and a movable friction layer; each of the fixed friction units includes a fixed support plate and a fixed friction layer; the movable support plate can be fixedly connected to the second elastic component, and the movable friction layer is arranged on the side of the movable support plate facing the fixed support plate; the fixed support plate is fixedly arranged in the accommodating cavity, and the fixed friction layer is arranged on the side of the fixed support plate facing the movable support plate; the second elastic component can drive the movable support plate to approach or move away from the fixed support plate, so that the movable friction layer contacts or separates from the fixed friction layer and generates electricity.

[0010] Preferably, each of the movable support plates includes a movable connecting plate and a plurality of movable docking plates, the movable connecting plate can be fixedly connected to one end of the second elastic component, the plurality of movable docking plates are distributed along the circumference of the movable connecting plate and connected to the movable connecting plate, and the movable friction layer is provided on the side of each movable connecting plate facing the fixed support plate; the fixed friction layer is provided on the area opposite to the movable friction layer on the side of each fixed support plate facing the movable support plate.

[0011] Preferably, each of the movable docking plates includes two folding plates, both of which are hinged to a connecting shaft, and one end of the connecting shaft is fixedly connected to the movable connecting plate; the movable friction layer includes a first sub-movable friction layer and a second sub-movable friction layer, and the two folding plates are on the side facing the fixed support plate; the fixed friction layer includes a plurality of first sub-fixed friction layers and a plurality of second sub-fixed friction layers, the first sub-movable friction layer is opposite to the first sub-fixed friction layer, and the second sub-movable friction layer is opposite to the second sub-fixed friction layer; in the process of the second elastic component driving the movable support plate away from the fixed support plate, each of the movable docking plates The two folded plates of the plate rotate relative to the connecting shaft so that the two folded plates approach the side of the fixed support plate and make the first sub-movable friction layer contact the second sub-movable friction layer; in the process of the second elastic component driving the movable support plate to approach the fixed support plate, the two folded plates of each movable docking plate can be driven to rotate relative to the connecting shaft so that the two folded plates are unfolded to a flat plate shape so that the first sub-movable friction layer and the second sub-movable friction layer are separated, and the first sub-movable friction layer and the second sub-movable friction layer can be respectively contacted with the first sub-fixed friction layer and the second sub-fixed friction layer.

[0012] Preferably, the piezoelectric unit is also fixedly provided on each of the second elastic components, and the elastic deformation of each of the second elastic components can drive the corresponding piezoelectric unit to deform and generate electricity.

[0013] Preferably, each of the first elastic component and each of the second elastic component is configured as a flat spring, and each of the piezoelectric units is configured as a piezoelectric sheet; and one of the piezoelectric units is provided between two adjacent spring coils of each of the first elastic component and each of the second elastic component.

[0014] Preferably, the floating shell and / or the movable component is configured as a spherical shell.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The fluid energy capture device provided by the present invention has a floating shell arranged in the fluid, and a movable part, multiple first elastic parts and multiple piezoelectric units are arranged in the sealed cavity of the floating shell. The sealed cavity prevents the fluid from eroding the movable part, the first elastic part and the piezoelectric unit. Since the movable part is connected to the inner wall of the floating shell through multiple first elastic parts, the floating shell can move with the fluid under the impact of fluid in different directions, and drive the movable part to move relative to the floating shell in the sealed cavity through inertial force to elastically deform the multiple first elastic parts, and the movable part can also move relative to the floating shell in the sealed cavity under the action of its own gravity and the restoring force of the deformed first elastic part. Since each first elastic part is connected to a piezoelectric unit, the elastic deformation of the first elastic part can drive the piezoelectric unit to deform and generate electricity. Therefore, the fluid energy capture device provided by the present invention is not limited to capturing fluid fluctuation energy in a specific direction, and can improve the energy capture efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of a partial explosion structure of the fluid energy capture device provided in Example 1;

[0019] Figure 2 Schematic diagram of the explosion structure of the movable parts and tribo-nanoelectric power generation assembly provided in Example 1;

[0020] Figure 3 A schematic diagram of the coordination structure of the movable friction unit and the fixed friction unit provided in Example 1;

[0021] Figure 4 for Figure 3 A bottom-up schematic diagram of the active friction unit is provided;

[0022] Figure 5 This is a schematic diagram of the cooperation between the piezoelectric unit and the first elastic component or the second elastic component provided in the first embodiment.

[0023] Icons: 1-fluid energy capture device; 10-floating shell; 11-sealed chamber; 20-movable component; 21-accommodating chamber; 30-first elastic component; 40-piezoelectric unit; 50-friction nano-power generation component; 51-movable friction unit; 511-movable support plate; 5111-movable connecting plate; 5112-movable docking plate; 51121-folding plate; 51122-connecting shaft; 512-movable friction layer; 5121-first sub-movable friction layer; 5122-second sub-movable friction layer; 52-fixed friction unit; 521-fixed support plate; 522-fixed friction layer; 5221-first sub-fixed friction layer; 5222-second sub-fixed friction layer; 53-intermediate fixed plate; 54-limiting plate; 60-second elastic component. DETAILED DESCRIPTION

[0024] 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.

[0025] The purpose of the present invention is to provide a fluid energy capture device to solve the problems existing in the above-mentioned prior art. The piezoelectric effect is used to capture fluid energy, which can improve the energy capture efficiency.

[0026] 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.

[0027] Example 1

[0028] This embodiment provides a fluid energy capture device 1, see Figure 1-Figure 5 , comprising a floating shell 10, a movable component 20, a plurality of first elastic components 30 and a plurality of piezoelectric units 40; the floating shell 10 has a sealed cavity 11, and is used to be disposed in a fluid and can move with the fluid; the movable component 20 is disposed in the sealed cavity 11; each first elastic component 30 is disposed in the sealed cavity 11, and the two ends of each first elastic component 30 are fixedly connected to the outer wall surface of the movable component 20 and the inner wall surface of the floating shell 10 respectively. The floating shell 10 moves with the fluid and can drive the movable component 20 to move relative to the floating shell 10 in the sealed cavity 11, so that the plurality of first elastic components 30 are elastically deformed; at least one piezoelectric unit 40 is fixedly disposed on each first elastic component 30, and the elastic deformation of the first elastic component 30 can drive the corresponding piezoelectric unit 40 to deform to generate electricity.

[0029] A floating shell 10 is disposed in a fluid. A movable component 20, multiple first elastic components 30, and multiple piezoelectric units 40 are disposed within a sealed chamber 11 of the floating shell 10. The sealed chamber 11 prevents fluid from eroding the movable component 20, the first elastic components 30, and the piezoelectric units 40. Because the movable component 20 is connected to the inner wall of the floating shell 10 via the multiple first elastic components 30, the floating shell 10 can move with the fluid under fluid impact from different directions. Inertia drives the movable component 20 to move relative to the floating shell 10 within the sealed chamber 11, causing the multiple first elastic components 30 to elastically deform. Furthermore, the movable component 20 can also move relative to the floating shell 10 within the sealed chamber 11 under the action of its own weight and the restoring force of the deformed first elastic components 30. Because each first elastic component 30 is connected to a piezoelectric unit 40, the elastic deformation of the first elastic component 30 can drive the piezoelectric unit 40 to deform and generate electricity. Therefore, the fluid energy capture device 1 provided by the present invention is not limited to capturing fluid wave energy in a specific direction, and can improve energy capture efficiency.

[0030] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 1 The number of the first elastic components 30 is set to six, and the multiple first elastic components 30 are evenly distributed in the space between the movable component 20 and the floating shell 10. The six first elastic components 30 can be distributed along the spatial rectangular coordinate system, thereby increasing the degree of freedom of the movable component 20 relative to the floating shell 10 and further improving the energy capture efficiency.

[0031] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 2 The fluid energy capture device 1 provided in this embodiment further includes a friction nano-power generation component 50 and a second elastic component 60. The movable component 20 has a receiving cavity 21. The friction nano-power generation component 50 and the second elastic component 60 are arranged in the receiving cavity 21. The friction nano-power generation component 50 includes a movable friction unit 51 and a fixed friction unit 52. The fixed friction unit 52 is fixedly arranged in the receiving cavity 21. The two ends of the second elastic component 60 can be fixedly connected to the movable friction unit 51 and the inner wall of the movable component 20 respectively. The second elastic component 60 can generate The elastic deformation can drive the movable friction unit 51 to approach or move away from the fixed friction unit 52 so that the movable friction unit 51 contacts or separates from the fixed friction unit 52 and generates electricity; when the movable component 20 moves in the sealed cavity 11, the second elastic component 60 can be elastically deformed under the action of inertia or gravity, and can combine its own restoring force to drive the movable friction unit 51 to move synchronously relative to the movable component 20 and the fixed friction unit 52 in the accommodating cavity 21, contact or separate from the fixed friction unit 52 and generate electricity, further improving the stability and energy capture efficiency of the device.

[0032] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 2 , two friction nano-power generation components 50 and two second elastic components 60 are each provided, an intermediate fixed plate 53 is fixedly provided in the movable component 20, a friction nano-power generation component 50 and a second elastic component 60 are provided on both sides of the intermediate fixed plate 53, and the two fixed friction units 52 of the two friction nano-power generation components 50 are respectively fixedly connected to the two side surfaces of the intermediate fixed plate 53. By providing two friction nano-power generation components 50 and two second elastic components 60, they can be symmetrically arranged along the intermediate fixed plate 53 to further improve the energy capture efficiency.

[0033] Specifically, the intermediate fixing plate 53 can be configured as an acrylic plate, and the intermediate fixing plate 53 can be snapped into the movable component 20 .

[0034] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 3 and Figure 4 Each movable friction unit 51 includes a movable support plate 511 and a movable friction layer 512; each fixed friction unit 52 includes a fixed support plate 521 and a fixed friction layer 522; the movable support plate 511 can be fixedly connected to the second elastic component 60, and the movable friction layer 512 is arranged on the side of the movable support plate 511 facing the fixed support plate 521; the fixed support plate 521 is fixedly arranged in the accommodating cavity 21, and the fixed friction layer 522 is arranged on the side of the fixed support plate 521 facing the movable support plate 511; the second elastic component 60 can drive the movable support plate 511 to approach or move away from the fixed support plate 521, so that the movable friction layer 512 and the fixed friction layer 522 contact or separate and generate electricity; the movable support plate 511 and the fixed support plate 521 respectively play the role of supporting the movable friction layer 512 and the fixed friction layer 522.

[0035] Further preferably, see Figure 3 and Figure 4 , each movable support plate 511 includes a movable connecting plate 5111 and a plurality of movable docking plates 5112, the movable connecting plate 5111 can be fixedly connected to one end of the second elastic component 60, and the plurality of movable docking plates 5112 are distributed along the circumference of the movable connecting plate 5111 and connected to the movable connecting plate 5111, and a movable friction layer 512 is provided on the side of each movable connecting plate 5111 facing the fixed support plate 521; a fixed friction layer 522 is provided on the side of each fixed support plate 521 facing the movable support plate 511 in the area opposite to the each movable friction layer 512; specifically, six movable docking plates 5112 can be evenly distributed along the circumference of the movable connecting plate 5111 to improve the stability of the device, and the movable support plate 511 can be in a snowflake shape.

[0036] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 3and Figure 4 , each movable docking plate 5112 includes two folding plates 51121, and the two folding plates 51121 are hinged to a connecting shaft 51122, and one end of the connecting shaft 51122 is fixedly connected to the movable connecting plate 5111; the movable friction layer 512 includes a first sub-movable friction layer 5121 and a second sub-movable friction layer 5122, and the two folding plates 51121 are on the side facing the fixed support plate 521; the fixed friction layer 522 includes a plurality of first sub-fixed friction layers 5221 and a plurality of second sub-fixed friction layers 5222, the first sub-movable friction layer 5121 is opposite to the first sub-fixed friction layer 5221, and the second sub-movable friction layer 5122 is opposite to the second sub-fixed friction layer 5222; in the process of the second elastic component 60 driving the movable support plate 511 away from the fixed support plate 521, that is, in the process of the second elastic component 60 contracting, the two folding plates of each movable docking plate 5112 can be driven Under the action of inertia force, 51121 rotates relative to the connecting shaft 51122 so that the two folded plates 51121 approach the side of the fixed support plate 521 and the first sub-movable friction layer 5121 and the second sub-movable friction layer 5122 are in contact, so that each movable docking plate 5112 itself can also perform contact and separation to generate electricity, further improving the energy capture efficiency; in the process of the second elastic component 60 driving the movable support plate 511 to approach the fixed support plate 521, it can drive the two folded plates 51121 of each movable docking plate 5112 to rotate relative to the connecting shaft 51122 so that the two folded plates 51121 are unfolded to a flat plate shape to separate the first sub-movable friction layer 5121 and the second sub-movable friction layer 5122, and can make each first sub-movable friction layer 5121 and the second sub-movable friction layer 5122 contact with the first sub-fixed friction layer 5221 and the second sub-fixed friction layer 5222 respectively.

[0037] Specifically, a first movable electrode layer and a second movable electrode layer are respectively provided between the first sub-movable friction layer 5121 and the second sub-movable friction layer 5122 and the movable support plate 511, and a first fixed electrode layer and a second fixed electrode layer are respectively provided between the first sub-fixed friction layer 5221 and the second sub-fixed friction layer 5222 and the fixed support plate 521, wherein the first movable electrode layer is circuit-connected to the first fixed electrode layer to output electrical energy, and the second movable electrode layer is circuit-connected to the second fixed electrode layer to output electrical energy; and the first movable electrode layer can also be circuit-connected to the second movable electrode layer to output electrical energy; the first sub-movable friction layer 5121 can be made of the same material as the second sub-fixed friction layer 5222, and the second sub-movable friction layer 5122 can be made of the same material as the first sub-fixed friction layer 5221, and the selection of specific materials is determined according to actual needs.

[0038] Specifically, in order to ensure that the two folding plates 51121 rotate relative to the connecting shaft 51122 so that the two folding plates 51121 are unfolded to a flat plate shape and avoid excessive flipping, the connecting shaft 51122 can be set to a rectangle and located between the two folding plates 51121. The inner ends of the two folding plates 51121 facing the side of the fixed support plate 521 are hinged to one side of the connecting shaft 51122 through a pin shaft. In the process of the two folding plates 51121 moving away from each other after folding, the folding plates 51121 can be limited by the side of the connecting shaft 51122. At this time, the two folding plates 51121 are just 121 is unfolded into a flat plate; in addition, a limit plate 54 can be set between the second elastic component 60 and the movable friction unit 51, and the two side surfaces of the limit plate 54 are fixedly connected to the second elastic component 60 and the movable connecting plate 5111 respectively. In the process of the two folding plates 51121 being folded in half and moving away from each other, the limit plate 54 and the folding plates 51121 are restrained against each other so that the two folding plates 51121 are just unfolded into a flat plate; specifically, the limit plate 54 can be made of silicone material, and the limit plate 54, the movable friction unit 51 and the fixed friction unit 52 can be set to the same material, shape and size.

[0039] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 5 Each second elastic component 60 is also provided with a piezoelectric unit 40. The elastic deformation of each second elastic component 60 can drive the corresponding piezoelectric unit 40 to deform and generate electricity, further improving the energy capture efficiency.

[0040] Among the optional solutions of this embodiment, it is more preferred to refer to Figure 5 , each first elastic component 30 and each second elastic component 60 are configured as a spring, and each piezoelectric unit 40 is configured as a piezoelectric sheet. Specifically, the piezoelectric sheet can be a PVDF flexible piezoelectric sheet; a piezoelectric unit 40 is provided between two adjacent spring coils of each first elastic component 30 and each second elastic component 60 to improve energy capture efficiency. Specifically, the spring can be configured as a flat spring, that is, the spring coil of the spring has a plane, such as Figure 5 As shown, it is convenient to fix the piezoelectric piece.

[0041] Specifically, the first elastic component 30 and the second elastic component 60 are made of silicone material, and the pitch size of the first elastic component 30 and the second elastic component 60 is determined according to actual needs.

[0042] In the optional scheme of this embodiment, it is more preferred that the floating shell 10 and / or the movable component 20 are configured to be spherical. Further preferably, the floating shell 10 and the movable component 20 are configured to be spherical, and both the floating shell 10 and the movable component 20 are configured to be detachable spherical shells for easy installation and maintenance.

[0043] Specifically, guide holes may be provided on the floating shell 10 and the movable member 20 so that the piezoelectric unit 40 and the triboelectric nano-power generation assembly 50 can be connected to an external electrical device or an electrical storage device.

[0044] 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 fluid energy capture device, characterized in that: include: A floating shell (10) having a sealed cavity (11), wherein the floating shell (10) is configured to be disposed in a fluid and capable of moving with the fluid; A movable component (20) is disposed in the sealed cavity (11); A friction nano-power generation component (50) and a second elastic component (60), wherein the movable component (20) has a receiving cavity (21), and the friction nano-power generation component (50) and the second elastic component (60) are arranged in the receiving cavity (21); the friction nano-power generation component (50) includes a movable friction unit (51) and a fixed friction unit (52), and the fixed friction unit (52) is fixedly arranged in the receiving cavity (21), and the two ends of the second elastic component (60) can be fixedly connected to the inner wall of the movable friction unit (51) and the movable component (20) respectively; each movable The friction unit (51) includes a movable support plate (511) and a movable friction layer (512); each of the fixed friction units (52) includes a fixed support plate (521) and a fixed friction layer (522); each of the movable support plates (511) includes a movable connecting plate (5111) and a plurality of movable docking plates (5112), wherein the movable connecting plate (5111) can be fixedly connected to one end of the second elastic component (60), and the plurality of movable docking plates (5112) are distributed along the circumference of the movable connecting plate (5111) and connected to the movable connecting plate (5111), and each of the movable connecting plates (5111) is connected to the movable connecting plate (5111). 111) is provided with the movable friction layer (512) on the side facing the fixed support plate (521); the fixed friction layer (522) is provided on the side of each fixed support plate (521) facing the movable support plate (511) in the area opposite to each movable friction layer (512); the movable friction layer (512) and the fixed friction layer (522) can be in contact or separated to generate electricity; each movable docking plate (5112) includes two folding plates (51121), and the two folding plates (51121) are hinged to a connecting shaft (51122), and the connecting shaft One end of (51122) is fixedly connected to the movable connecting plate (5111); the movable friction layer (512) includes a first sub-movable friction layer (5121) and a second sub-movable friction layer (5122), and the first sub-movable friction layer (5121) and the second sub-movable friction layer (5122) are respectively arranged on the side surfaces of the two folding plates (51121) facing the fixed support plate (521); the first sub-movable friction layer (5121) and the second sub-movable friction layer (5122) can rotate relative to the connecting shaft (51122) to achieve contact or separation for power generation.

2. The fluid energy capture device according to claim 1, characterized in that: Also includes: a plurality of first elastic components (30), each of the first elastic components (30) being disposed in the sealed cavity (11), and having two ends of each first elastic component (30) fixedly connected to the outer wall surface of the movable component (20) and the inner wall surface of the floating shell (10), respectively; the floating shell (10) moves with the fluid and can drive the movable component (20) to move relative to the floating shell (10) in the sealed cavity (11), so that the plurality of first elastic components (30) undergo elastic deformation; and A plurality of piezoelectric units (40), at least one of the piezoelectric units (40) is fixedly arranged on each of the first elastic components (30), and elastic deformation of the first elastic component (30) can drive the corresponding piezoelectric unit (40) to deform and generate electricity.

3. The fluid energy capture device according to claim 2, characterized in that: The number of the first elastic components (30) is set to six, and the plurality of first elastic components (30) are evenly distributed in the space between the movable component (20) and the floating shell (10).

4. The fluid energy capture device according to claim 2, wherein: The number of the friction nano-power generation component (50) and the number of the second elastic component (60) are both two, an intermediate fixed plate (53) is fixedly provided in the movable component (20), one friction nano-power generation component (50) and one second elastic component (60) are provided on both sides of the intermediate fixed plate (53), and the two fixed friction units (52) of the two friction nano-power generation components (50) are respectively fixedly connected to the two side surfaces of the intermediate fixed plate (53).

5. The fluid energy capture device according to claim 4, characterized in that: The fixed friction layer (522) comprises a plurality of first sub-fixed friction layers (5221) and a plurality of second sub-fixed friction layers (5222), the first sub-movable friction layers (5121) being opposite to the first sub-fixed friction layers (5221), and the second sub-movable friction layers (5122) being opposite to the second sub-fixed friction layers (5222); In the process of the second elastic component (60) driving the movable support plate (511) away from the fixed support plate (521), the two folding plates (51121) of each movable docking plate (5112) rotate relative to the connecting shaft (51122) so that the two folding plates (51121) approach the side of the fixed support plate (521) and the first sub-active friction layer (5121) and the second sub-active friction layer (5122) contact each other; the second elastic component (60) drives the movable support plate (5111) to approach the fixed support plate During the process of (521), the two folding plates (51121) of each movable docking plate (5112) can be driven to rotate relative to the connecting shaft (51122) so that the two folding plates (51121) are unfolded to a flat plate shape so as to separate the first sub-movable friction layer (5121) and the second sub-movable friction layer (5122), and each of the first sub-movable friction layer (5121) and the second sub-movable friction layer (5122) can be respectively brought into contact with the first sub-fixed friction layer (5221) and the second sub-fixed friction layer (5222).

6. The fluid energy capture device according to claim 4, wherein: The piezoelectric unit (40) is also fixedly provided on each of the second elastic components (60), and the elastic deformation of each of the second elastic components (60) can drive the corresponding piezoelectric unit (40) to deform and generate electricity.

7. The fluid energy capture device according to claim 6, wherein: Each of the first elastic components (30) and each of the second elastic components (60) is configured as a spring, and each of the piezoelectric units (40) is configured as a piezoelectric sheet; and one of the piezoelectric units (40) is provided between two adjacent spring coils of each of the first elastic components (30) and each of the second elastic components (60).

8. The fluid energy capture device according to claim 1, wherein: The floating shell (10) and / or the movable component (20) are configured as spherical shells.

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