A small wind-bell-shaped energy harvester based on triboelectric generation

Abstract

The present invention discloses a small, wind-bell-shaped energy collector based on triboelectric power generation. The collector comprises a sliding power generation device and a collision power generation device. Air flow drives the entire energy collector to oscillate, causing a slider inside the tray to slide relative to the tray. The collision power generation devices at the bottom of the tray collide with each other irregularly, causing the sliders to intermittently slide back to their original positions due to their swinging motion, generating electric charge. At the collision power generation device, the combined effects of collision force, magnetic pole repulsion, and elastic restoring force generate electric charge. This energy collector utilizes a double-layer, double-row annular array to mount the collision power generation devices, enabling more collisions and converting more electrical energy even in low wind speeds.

Description

Technical Field

[0001] The present invention relates to the technical field of triboelectric nano-power generation, and in particular to a small wind-bell-shaped energy collector based on triboelectric power generation. Background Art

[0002] Wind energy, primarily generated by air movement, has vast reserves and is widely distributed as a renewable, clean energy source. With the increasing popularity of the Internet of Things (IoT), various small objects in our lives are increasingly connected to electricity. Research on how to power these small devices sustainably and environmentally friendly is crucial.

[0003] The current power generation methods mainly include electromagnetic and piezoelectric. Frictional power generation, as an emerging power generation method, is environmentally friendly, sustainable, and low-cost. Combining wind energy with frictional power generation can achieve the problem of continuous power supply for small equipment, but there is currently no complete frictional power generation equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a small wind-bell-shaped energy collector based on frictional power generation to solve the problems existing in the above-mentioned prior art. The energy of air flow is collected by coupling the contact electrification and electrostatic induction, thereby realizing small-scale and continuous power supply for small devices.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a wind-bell-shaped small energy collector based on friction power generation, comprising

[0006] A sliding power generation device, comprising a tray, a slider, and an end cap. An Au film is adhered to a central groove of the tray, a KAPTON circular film is adhered above the Au film, the slider is placed in the tray, and the slider and the tray can generate relative displacement. An Al film is adhered below the slider, the Al film contacts the KAPTON circular film, and the end cap is mounted on top of the tray; and

[0007] A collision power generation device, the collision power generation device array mounted at the bottom of the tray includes an upper collision power generation device and a lower collision power generation device with the same structure, the upper collision power generation device includes a fixed rod, a bowl-shaped shell, a sliding rod and an elastic ring, the second electrode layer array is adhered to the outer side of the lower end of the fixed rod, and the PMMA film array is adhered to the second electrode layer; the shaft neck of the fixed rod passes through the top of the bowl-shaped shell, and the circumference of the bowl-shaped shell is provided with through holes corresponding to the positions of the second electrode layers, and the two annular arrays of magnets are adhered to the through holes of the bowl-shaped shell. outside the hole; the sliding rod is provided at the outer periphery of the bowl-shaped shell and at the position corresponding to each through hole, the first electrode layer is adhered to the end of the cylindrical shaft of the sliding rod, the KAPTON film is adhered to the first electrode layer, the outer end of the sliding rod is adhered to the elastic ring, and the magnet is installed at the outer end of the sliding rod; one end of the connecting rope of the upper collision power generation device is tied to the upper end hole of the fixed rod, and the other end is tied to the concave hole at the bottom of the tray, one end of the connecting rope of the lower collision power generation device is tied to the upper end hole of the fixed rod, and the other end is tied to the concave hole at the lower end of the fixed rod in the upper collision power generation device.

[0008] In one embodiment, the lower end of the fixing rod is in the shape of an octagonal prism, and the second electrode layer array is adhered to the side surface of the octagonal prism at the lower end of the fixing rod.

[0009] In one embodiment, the magnets 1 and 2 have the same magnetic properties in the relative directions.

[0010] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0011] The wind-bell-shaped small energy collector based on friction power generation in the present invention includes a sliding power generation device and a collision power generation device. The air flow drives the entire energy collector to swing, and the slider inside the tray slides relative to the tray. The collision power generation devices at the bottom of the tray collide with each other irregularly. The slider will intermittently slide back to its original position due to the swing. The Al film on the slider rubs against the KAPTON circular film on the tray to generate electric charge. When the Al film slides away from the KAPTON circular film, a forward current is formed; when it slides back to the KAPTON circular film, a reverse current is formed; at the collision power generation device, the collision force and magnetic The combined effects of polar repulsion and elastic restoring force cause the KAPTON film on the sliding rod and the PMMA film on the fixed rod to periodically contact and separate. As the KAPTON and PMMA films separate, the distance between the two layers gradually increases, creating a potential difference between the two electrodes. This potential difference drives electrons from the first electrode layer to the second, generating a positive current. When the distance between the KAPTON and PMMA films decreases, the potential of the first electrode layer becomes higher than that of the second, causing electrons to flow from the second electrode layer back to the first, generating a negative current. This energy harvester utilizes a double-layer, double-row circular array to mount the collision power generation device, generating more collisions and converting more electrical energy even in low wind speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 This is an axonometric diagram of the main three-dimensional structure of a wind-bell-shaped small energy collector based on friction power generation in an embodiment of the present invention;

[0014] Figure 2 An exploded diagram of the main three-dimensional structure of a wind-bell-shaped small energy harvester based on triboelectric power generation;

[0015] Figure 3 A cross-sectional view of the main three-dimensional structure of a wind-bell-shaped small energy harvester based on triboelectric power generation;

[0016] Figure 4 An exploded diagram of the three-dimensional structure of a collision power generation device with a wind-bell-shaped small energy harvester based on triboelectric power generation;

[0017] Figure 5 A bottom view of the three-dimensional structure of a collision power generation device with a wind-bell-shaped small energy collector based on triboelectric power generation;

[0018] Figure 6 A 3D cross-sectional view of the collision power generation device with a wind-bell-shaped small energy collector based on triboelectric power generation.

[0019] Description of main reference numerals

[0020] 1-bowl-shaped housing, 2-fixing rod, 3-second electrode layer, 4-PMMA film, 5-elastic ring, 6-first electrode layer, 7-KAPTON film, 8-sliding rod, 9-magnet 1, 10-magnet 2, 11-connecting rope, 12-end cover, 13-slider, 14-tray, 15-bolt, 16-Al film, 17-KAPTON circular film, 18-Au film. DETAILED DESCRIPTION

[0021] 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.

[0022] The purpose of the present invention is to provide a small wind-bell-shaped energy collector based on frictional power generation to solve the problems existing in the above-mentioned prior art. The energy of air flow is collected by coupling the contact electrification and electrostatic induction, thereby realizing small-scale and continuous power supply for small devices.

[0023] 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.

[0024] like Figures 1-6 As shown, the present invention provides a wind-bell-shaped small energy collector based on friction power generation, which mainly includes a sliding power generation device, a collision power generation device and a connecting rope 11.

[0025] The technical solution of the present invention is based on the coupling of contact electrification and electrostatic induction. An Au film 18 is adhered to the central recess of a tray 14, and a circular KAPTON film 17 is adhered above the Au film 18. An Al film 16 is adhered below the slider 13, and the entire assembly is then placed within the tray 14. An end cap 12 is placed over the tray 14 and secured with bolts 15. A connecting cord 11 is attached to the central recess above the end cap 12.

[0026] At the collision power generation device, the second electrode layer 3 array is adhered to the side of the octagonal prism at the lower end of the fixed rod 2, and the PMMA film 4 array is adhered to the second electrode layer 3. The fixed rod 2 shaft neck passes through the interior of the bowl-shaped shell 1, and the octagonal prism side at the lower end corresponds one-to-one with the through hole of the bowl-shaped shell 1, and is circumferentially fixed by gluing. The ring array of magnet 2 10 is adhered to the outside of the bowl-shaped shell 1, leaving an aperture. Magnet 1 9 is adhered to the sliding rod 8 according to the shaft hole. The sliding rod 8 is installed on the outside of the bowl-shaped shell 1 according to the shaft hole and the ring array. Then, the first electrode layer 6 is adhered to the end of the cylindrical shaft of the sliding rod 8, and the KAPTON film 7 is adhered to the first electrode layer 6. The elastic ring 5 is adhered to the outside of the sliding rod 8, surrounding the installed sliding rod 8. One end of the connecting rope 11 of the upper collision power generation device is tied to the hole at the upper end of the fixed rod 2, and the other end is tied to the concave hole at the bottom of the tray 14. One end of the connecting rope 11 of the lower collision power generation device is tied to the upper end hole of the fixed rod 2, and the other end is tied to the concave hole at the lower end of the fixed rod 2 in the upper collision power generation device. The collision power generation device array is installed at the bottom of the tray 14.

[0027] The working principle diagram of the wind-bell-shaped small energy harvester based on triboelectric power generation is shown in Figures 1 to 6 When the energy collector is subjected to force and begins to swing, the slider 13 located inside the tray 14 will produce relative displacement with the tray 14; the collision power generation device below the energy collector will swing, and they will collide with each other irregularly.

[0028] When slider 13 and tray 14 slide relative to each other, Al film 16 adhered to the bottom of slider 13 slides along with it, creating friction with circular KAPTON film 17 adhered to tray 14. This frictional effect generates charge. As Al film 16 slides away from circular KAPTON film 17, positive charge flows from Al film 16 to Au film 18, forming a forward current. Subsequently, gravity pulls Al film 16 toward circular KAPTON film 17, causing positive charge on Au film 18 to flow toward Al film 16, forming a reverse current.

[0029] When the collision power generation devices collide with each other irregularly, the elastic ring 5 on the outside of the bowl-shaped housing 1 bends at the stress-bearing point, simultaneously driving the nearby sliding rod 8 to slide along the aperture and impact the internal fixed rod 2. After the sliding rod 8 collides with the fixed rod 2, the repulsion between magnets 1 9 and 2 10, as well as the restoring force of the elastic ring, causes the sliding rod to return to its original position. Therefore, the impact force of the collision, the repulsive force of the like-polarity magnets, and the restoring force of the elastic material cause the first electrode layer 6 and KAPTON film 7 on the sliding rod 8 to periodically contact and separate from the PMMA film 4 and second electrode layer 3 on the fixed rod 2. When the KAPTON film 7 contacts the PMMA film 4, the triboelectric effect causes charge transfer to occur at the contact point between the two materials. Electrons on the PMMA film surface transfer to the surface of the Kapton film, resulting in a negative charge on the Kapton surface and a positive charge on the PMMA surface. When the KAPTON film 7 and PMMA film 4 separate, the distance between the two layers gradually increases, creating a potential difference between the two electrodes. This potential difference drives electrons from the first electrode layer 6 to the second electrode layer 3, generating a positive current. When the distance between the KAPTON film 7 and PMMA film 4 begins to decrease, the potential of the first electrode layer 6 becomes higher than that of the second electrode layer 3. This causes electrons to flow from the second electrode layer 3 back to the first electrode layer 6, reducing the amount of induced charge on the electrodes and generating a negative current. When the KAPTON film 7 and PMMA film 4 reconnect, all induced charges are neutralized.

[0030] The magnetism of magnet 1 9 and magnet 2 10 at corresponding positions is the same.

[0031] The characteristics of the wind-bell-shaped small energy harvester based on triboelectric power generation of the present invention are as follows:

[0032] (1) The invention has certain adaptability. During the swinging process of the energy harvester, the faster the swinging speed and the higher the frequency, the stronger the electromechanical conversion capability of the triboelectric nanogenerator and the more electrical energy it outputs;

[0033] (2) This generator utilizes the coupling of contact electrification and electrostatic induction. When two dissimilar materials rub against each other, their different electron-accepting capacities result in equal and opposite charges being generated on their surfaces. As the slider 13 and the slide rod 8 move, a potential difference forms between the two electrode layers. This potential difference drives the induced charges within the electrode layers to move in a directional manner, thereby generating an electric current.

[0034] (3) The surface of KAPTON film 7 is processed with nanostructures or microstructures, such as nanoparticles, nanogrooves, and microgrooves, to increase the contact area, thereby generating more friction charges on the surface and enhancing the output electrical energy.

[0035] (4) The collision power generation device adopts a double-layer double-row ring array to achieve more collisions per unit cycle under low wind speed conditions, more friction power generation plates to produce contact and separation, and improve power generation efficiency.

[0036] (5) The collision power generation device uses the principle of repulsion between like-charged magnets and the restoring force of elastic elements to provide power for the separation of friction plates and ensure the sustainable operation of the energy collector.

[0037] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0038] 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 wind-bell-shaped small energy harvester based on triboelectric power generation, characterized by: include A sliding power generation device, comprising a tray, a slider, and an end cap. An Au film is adhered to a central groove of the tray, a KAPTON circular film is adhered above the Au film, the slider is placed in the tray, and the slider and the tray can generate relative displacement. An Al film is adhered below the slider, the Al film contacts the KAPTON circular film, and the end cap is mounted on top of the tray; and A collision power generation device, wherein the collision power generation device array is installed at the bottom of the tray and comprises an upper collision power generation device and a lower collision power generation device with the same structure, wherein the upper collision power generation device comprises a fixing rod, a bowl-shaped shell, a sliding rod and an elastic ring, the second electrode layer array is adhered to the outer side surface of the lower end of the fixing rod, and the PMMA film array is adhered to the second electrode layer; the shaft neck of the fixing rod passes through the top of the bowl-shaped shell, and the circumference of the bowl-shaped shell is provided with through holes corresponding to the positions of the second electrode layers, and the two annular arrays of magnets are adhered to the outer sides of the through holes of the bowl-shaped shell; the bowl-shaped shell The sliding rod is provided at the position corresponding to the outer periphery of each through hole, the first electrode layer is adhered to the end of the cylindrical shaft of the sliding rod, the KAPTON film is adhered to the first electrode layer, the outer end of the sliding rod is adhered to the elastic ring, and the magnet is installed at the outer end of the sliding rod; one end of the connecting rope of the upper collision power generation device is tied to the upper end hole of the fixed rod in the upper collision power generation device, and the other end is tied to the concave hole at the bottom of the tray; one end of the connecting rope of the lower collision power generation device is tied to the upper end hole of the fixed rod in the lower collision power generation device, and the other end is tied to the concave hole at the lower end of the fixed rod in the upper collision power generation device.

2. The wind-bell-shaped small energy harvester based on triboelectric power generation according to claim 1, characterized in that: The lower end of the fixing rod is in the shape of an octagonal prism, and the second electrode layer array is adhered to the side surface of the octagonal prism at the lower end of the fixing rod.

3. The wind-bell-shaped small energy harvester based on triboelectric power generation according to claim 1, characterized in that: The magnets 1 and 2 have the same relative magnetic properties.

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