High-performance friction nanometer generator capable of continuously collecting full-speed wind energy

Abstract

The invention discloses a high-performance friction nanometer generator capable of continuously collecting full-speed wind energy. The high-performance friction nanometer generator comprises a stator layer, a rotor layer and a fan blade assembly. The stator layer, the rotor layer and the fan blade assembly are sequentially connected through a rotating shaft, so that the fan blade assembly drives the rotor layer to rotate, and the rotor layer rotates relative to the stator layer; a plurality of strong magnets are arranged in the stator layer, soft magnets matched with the strong magnets are arranged in the rotor layer, and a pulling rope connected with the rotor layer is arranged on the rotating shaft; in a low-wind-speed state, relative movement of the rotor layer and the stator layer in the vertical direction is controlled through cooperation of the strong magnets and the soft magnets, the contact tightness degree of the rotor layer and the stator layer is guaranteed, and in a high-wind-speed state, contact between the rotor layer and the stator layer is separated through the traction rope, so that the contact tightness degree of the rotor layer and the stator layer is improved. Dynamic balance between a low wind speed and a high wind speed and between a contact state and a separation state is realized, and the durability of the friction nanometer generator is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of nanogenerators, and in particular to a high-performance friction nanogenerator capable of sustainably collecting full-speed wind energy. Background Art

[0002] Wind energy, as the most typical clean energy, has received extensive attention, but traditional turbine wind turbines have certain problems. The friction nanogenerator based on the coupling of triboelectric effect and electrostatic induction effect is a new type of wind energy collection method, which solves various problems of traditional wind turbines, such as large size, high cost, and limited scope of use. The initial contact-separation friction nanogenerator can only realize the collection of unidirectional wind energy, so predecessors have made improvements on this basis and designed a rotating independent layer friction nanogenerator to realize the collection of multi-directional wind energy. Most friction nanogenerators have poor starting performance in low wind speed environments, but low wind speeds such as breezes account for the highest proportion in conventional environments. Therefore, the current friction nanogenerators have the problem of poor adaptability to all wind speeds. In addition, due to the mechanical process of friction of the friction material itself, friction loss is inevitably generated, resulting in a significant decrease in the wear resistance of the friction nanogenerator, making it difficult to work stably and continuously for a long time. Therefore, the wear resistance of the device is also another aspect that needs to be considered. Summary of the invention

[0003] In view of the above problems in the prior art, the present invention provides a high-performance friction nanogenerator that can sustainably collect full-speed wind energy, which solves the problem of poor wear resistance of existing friction nanogenerators.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A high-performance friction nanogenerator for sustainable collection of full-speed wind energy is provided, which comprises a stator layer, a rotor layer and a blade assembly; the stator layer, the rotor layer and the blade assembly are sequentially connected through a rotating shaft, so that the blade assembly drives the rotor layer to rotate, and the rotor layer rotates relative to the stator layer; a plurality of strong magnets are arranged in the stator layer, a soft magnet matching the strong magnets is arranged in the rotor layer, and a traction rope connected to the rotor layer is arranged on the rotating shaft.

[0006] Under low wind speed conditions, the present invention controls the relative movement of the rotor layer and the stator layer in the vertical direction through the cooperation of strong magnets and soft magnets to ensure the tightness of contact between the rotor layer and the stator layer. Under high wind speed conditions, the contact between the rotor layer and the stator layer is separated by a traction rope to achieve a dynamic balance between low and high wind speeds, and between the contact state and the separation state, thereby enhancing the durability of the friction nanogenerator.

[0007] Furthermore, the stator layer includes a stator substrate, the middle part of which is connected to the rotating shaft through a bearing; a copper foil electrode is arranged on the stator substrate, and a negative friction layer is attached to the copper foil electrode.

[0008] Furthermore, the negative friction layer is a polytetrafluoroethylene film.

[0009] Furthermore, the rotor layer includes a rotor base plate connected to the rotating shaft, a plurality of grooves are evenly arranged on the upper surface of the rotor base plate, and reinforcing ribs are arranged between adjacent grooves; a positive friction layer is evenly arranged on the lower surface of the rotor base plate.

[0010] Further, the positive friction layer includes four sheets of polyurethane foam.

[0011] Furthermore, one end of the traction rope is fixed on the rotating shaft, and the other end of the traction rope passes through the reinforcing rib and the rotor base plate and is connected to the polyurethane foam.

[0012] Furthermore, a plurality of strong magnets are arranged between the stator substrate and the copper foil electrode, and the plurality of strong magnets are evenly arranged in a ring shape on the upper surface of the stator substrate; a soft magnet cooperating with the strong magnet is attached to the upper surface of the polyurethane foam.

[0013] Furthermore, the fan blade assembly includes a fan blade shaft installed on the rotating shaft, and a plurality of fan blades are evenly arranged on the circumference of the fan blade shaft through a connecting rod.

[0014] The present invention discloses a high-performance friction nanogenerator capable of sustainably collecting full-speed wind energy, which has the following beneficial effects:

[0015] 1. The present invention can realize automatic mode switching under all wind speed conditions, thereby improving high wear resistance. The relative movement of the rotor layer and the stator layer in the vertical direction is controlled by the traction rope structure and the matching structure of the strong magnet and the soft magnet. Under low wind speed conditions, the friction and wear are low, and the rotor layer and the stator layer can contact each other. The magnet further ensures the closeness of their contact. This further contact compensates for the low output under low wind speed; under high wind speed conditions, the friction between the rotor layer and the stator layer is more intense, and the traction rope can control the separation of the two, reducing the friction loss under high wind speed. Although the separation will cause a certain degree of reduction in output, the high wind speed itself also compensates for the decrease in electrical output. Finally, the device achieves a dynamic balance between low wind speed and high wind speed, contact state and separation state, and can successfully achieve the effect of enhancing the durability of the friction nanogenerator.

[0016] 2. The fan blades of the present invention combine S-type resistance-type fan blades and D-type lift-type fan blades, ensuring that under the same wind direction, the fan blades are driven to rotate by both lift and resistance, which can better improve the sensitivity of the fan blades to wind speed, achieve easy starting effect in low wind speed environments such as breezes, and greatly improve environmental energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a high-performance friction nanogenerator for sustainable collection of full-speed wind energy according to the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the rotor layer and the fan blade assembly of the present invention.

[0019] Figure 3 It is a schematic diagram of the exploded structure of the stator layer and the rotor layer of the present invention.

[0020] Figure 4 The schematic diagram of the structure of the copper foil electrode of the present invention is

[0021] Figure 5 It is a schematic structural diagram of the fan blade assembly of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the fan blade assembly of the present invention from another angle.

[0023] Figure 7 It is a schematic diagram of the fan blade assembly of the present invention being driven by resistance.

[0024] Figure 8 It is a schematic diagram of the fan blade assembly of the present invention being driven by lift.

[0025] Fig. 9 It is a schematic structural diagram of the contact and separation mode switching of the rotor layer and the stator layer of the present invention.

[0026] Fig.10 This is the low speed voltage output image of the present invention.

[0027] Fig.11 This is the high speed current output image of the present invention.

[0028] Among them, 1. stator layer; 11. stator substrate; 12. copper foil electrode; 13. negative friction layer; 2. rotor layer; 21. rotor substrate; 22. groove; 23. reinforcing ribs; 24. positive friction layer; 3. fan blade assembly; 31. fan blade shaft; 32. fan blade; 4. traction rope; 51. strong magnet; 52. soft magnet. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0030] This embodiment provides a high-performance friction nanogenerator for sustainable collection of full-speed wind energy, the purpose of which is to solve the problem of poor wear resistance of existing friction nanogenerators. Figure 1-Figure 9 , the specific structure of this embodiment will be described in detail below.

[0031] A high-performance friction nanogenerator capable of sustainably collecting full-speed wind energy comprises a stator layer 1, a rotor layer 2 and a fan blade assembly 3.

[0032] Among them, the stator layer 1, the rotor layer 2 and the blade assembly 3 are connected in sequence through a rotating shaft, so that the blade assembly 3 drives the rotor layer 2 to rotate, and the rotor layer 2 rotates relative to the stator layer 1; a plurality of strong magnets 51 are arranged in the stator layer 1, and a soft magnet 52 matching the strong magnet 51 is arranged in the rotor layer 2, and a traction rope 4 connected to the rotor layer 2 is arranged on the rotating shaft.

[0033] In this embodiment, the present invention can realize automatic mode switching under full wind speed environment, thereby improving high wear resistance. The relative movement of the rotor layer 2 and the stator layer 1 in the vertical direction can be controlled by using the traction rope 4 and the cooperation of the strong magnet 51 and the soft magnet 52. Under low wind speed conditions, the friction and wear are low, and the rotor layer 2 and the stator layer 1 can contact each other. The cooperation of the strong magnet 51 and the soft magnet 52 further ensures the closeness of their contact. This further contact compensates for the lower output under low wind speed. The output voltage of this friction nanogenerator reaches 160V at a speed of 200rpm. Its voltage output image is shown in FIG. Fig.10 .

[0034] At high wind speeds, the friction between the rotor layer 2 and the stator layer 1 is more intense. The traction rope 4 can control the separation of the two, thereby reducing the friction loss at high wind speeds. Although the separation will lead to a certain degree of reduction in output, the high wind speed itself also compensates for the decrease in electrical output. Ultimately, the device achieves a dynamic balance between low and high wind speeds, and between contact and separation states, and can successfully achieve the effect of enhancing the durability of the friction nanogenerator. The output voltage of the friction nanogenerator reaches 5.9μA at a speed of 1000rpm, and its current output image is shown in Figure 2. Fig.11 .

[0035] Specifically, the stator layer 1 includes a stator substrate 11 , the middle portion of which is connected to the rotating shaft via a bearing; a copper foil electrode 12 is provided on the stator substrate 11 , and a negative friction layer 13 is attached to the copper foil electrode 12 .

[0036] The negative friction layer 13 is a polytetrafluoroethylene film.

[0037] In this embodiment, the stator substrate 11 is made of an acrylic plate with a thickness of 3 mm, cut at a cutting speed of 300 mm / s and a power of 40 w, with dimensions of an outer diameter of 98.6 mm and an inner diameter of 8.0 mm. It is located at the bottom end of the friction nanogenerator and is connected to the rotating shaft through a bearing in the middle of the stator substrate 11.

[0038] The copper foil electrode 12 is a positive and negative copper foil electrode designed in a grating shape, which is used to connect the external circuit and derive the collected electrical signal. It is carved by a carving knife and consists of an inner electrode and an outer electrode, both of which are composed of 4 groups of 1 / 8 circle fan-shaped patterns. The inner electrode has an outer diameter of 92.072mm and an inner diameter of 8.0mm, and the outer electrode has an outer diameter of 98.6mm and an inner diameter of 17.072mm.

[0039] The negative friction layer 13 is a polytetrafluoroethylene film, which is used as a friction negative electrode material. The polytetrafluoroethylene film is cut into a circle with an outer diameter of 98.6 mm and an inner diameter of 8.0 mm using a carving knife.

[0040] Specifically, the rotor layer 2 includes a rotor base plate 21 connected to the rotating shaft. A plurality of grooves 22 are evenly formed on the upper surface of the rotor base plate 21 , and reinforcing ribs 23 are arranged between adjacent grooves. A positive friction layer 24 is evenly arranged on the lower surface of the rotor base plate 21 .

[0041] The positive friction layer 24 comprises four sheets of polyurethane foam.

[0042] In this embodiment, the rotor substrate 21 uses an acrylic plate with a thickness of 3 mm, which is cut at a cutting speed of 300 mm / s and a power of 40 w, with dimensions of an outer diameter of 98.6 mm and an inner diameter of 3.85 mm; the rotor substrate 21 provides support and stability for the rotor layer 2, and regulates the movement path of the positive friction layer 24. The rotor substrate 21 is lightened by providing a plurality of grooves 22, and the strength of the rotor substrate 21 is enhanced by reinforcing ribs 23.

[0043] The positive friction layer 24 includes four pieces of polyurethane foam, each piece of polyurethane foam is blade-shaped and used as the friction positive electrode material. The thickness of the blade-shaped polyurethane foam is 3mm. It is cut at a cutting speed of 300mm / s and a power of 10w. The size is 1 / 8 of a circle with an outer diameter of 92.072mm and an inner diameter of 17.072mm. A total of 4 pieces are cut.

[0044] Specifically, one end of the traction rope 4 is fixed on the rotating shaft, and the other end of the traction rope 4 passes through the reinforcing rib 23 and the rotor base plate 21 and is connected to the polyurethane foam.

[0045] In this embodiment, the positive friction layer 24 includes four pieces of polyurethane foam, and the number of traction ropes 4 matches the number of polyurethane foams, and a total of eight traction ropes are provided. One end of the eight traction ropes 4 is fixed on the rotating shaft, and the other ends of the eight traction ropes 4 pass through the reinforcing ribs 23 and the rotor base plate 21. Then, two traction ropes 4 are connected to the two ends of a piece of polyurethane foam, so that the rotor layer 2 and the stator layer 1 can achieve automatic mode switching of contact and separation through the change of centrifugal force.

[0046] Specifically, a plurality of strong magnets 51 are arranged between the stator substrate 11 and the copper foil electrode 12 , and the plurality of strong magnets 51 are evenly arranged in a ring shape on the upper surface of the stator substrate 11 ; a soft magnet 52 cooperating with the strong magnet 54 is attached to the upper surface of the polyurethane foam.

[0047] In this embodiment, the close contact between the rotor layer 2 and the stator layer 1 is achieved through the magnetic force between the strong magnet 51 and the soft magnet 52. Under low wind speed conditions, the friction and wear are low, and the rotor layer 2 and the stator layer 1 can contact each other. The cooperation between the strong magnet 51 and the soft magnet 52 further ensures the closeness of their contact. This further contact compensates for the lower output at low wind speeds.

[0048] Specifically, the fan blade assembly 3 includes a fan blade shaft 31 installed on a rotating shaft, and a plurality of fan blades 32 are evenly arranged on the circumference of the fan blade shaft 31 through connecting rods.

[0049] In this embodiment, the blade 32 is designed to be easy to start, which improves the traditional blade structure to a certain extent. The upper end of the blade 32 is a resistance-type S-type blade, and the lower end of the blade 32 is a lift-type D-type blade. It combines the excellent characteristics of the resistance-type S-type blade and the lift-type D-type blade, integrates the cup-shaped wind cup and the airfoil design into one blade 32, and further spirally rotates to reduce the starting dead angle of the blade 32. This friction nanogenerator is equipped with three blades 32 of the above structure, and the angle between the three blades 32 is 120°, which increases the wind receiving area and ensures its wind speed adaptability.

[0050] Driven by the ambient wind, the drag-type S-type structure at the top of the blade 32 is driven by drag, and the lift-type D-type structure is driven by lift. A simple force analysis diagram is shown as follows: Figure 6 , Figure 7 As shown, the two driving forces work together to rotate the fan blades 32, efficiently capturing wind energy, thereby driving the shaft and the rotor layer 2 to move, making it easy to start at low wind speeds, thereby achieving full wind speed adaptation of the friction nanogenerator.

[0051] Although the specific implementation of the invention is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A high-performance triboelectric nanogenerator for sustainable collection of full-speed wind energy, characterized by: The invention comprises a stator layer (1), a rotor layer (2) and a blade assembly (3); the stator layer (1), the rotor layer (2) and the blade assembly (3) are sequentially connected via a rotating shaft, so that the blade assembly (3) drives the rotor layer (2) to rotate, and the rotor layer (2) rotates relative to the stator layer (1); The stator layer (1) is provided with a plurality of strong magnets (51), the rotor layer (2) is provided with soft magnets (52) matching the strong magnets (51), and the rotating shaft is provided with a traction rope (4) connected to the rotor layer (2).

2. The high-performance friction nanogenerator for sustainable collection of full-speed wind energy according to claim 1 is characterized in that: The stator layer (1) comprises a stator base plate (11), and the middle part of the stator base plate (11) is connected to the rotating shaft via a bearing; A copper foil electrode (12) is provided on the stator substrate (11), and a negative friction layer (13) is attached to the copper foil electrode (12).

3. The high-performance friction nanogenerator for sustainable collection of full-speed wind energy according to claim 2 is characterized in that: The negative friction layer (13) is a polytetrafluoroethylene film.

4. The high-performance triboelectric nanogenerator for sustainable collection of full-speed wind energy according to claim 2, characterized in that: The rotor layer (2) comprises a rotor base plate (21) connected to the rotating shaft, a plurality of grooves (22) are evenly arranged on the upper surface of the rotor base plate (21), and reinforcing ribs (23) are arranged between adjacent grooves; A positive friction layer (24) is evenly provided on the lower surface of the rotor base plate (21).

5. The high-performance tribo-nanogenerator for sustainable collection of full-speed wind energy according to claim 4, characterized in that: The positive friction layer (24) comprises four sheets of polyurethane foam.

6. The high-performance triboelectric nanogenerator for sustainable collection of full-speed wind energy according to claim 5, characterized in that: One end of the traction rope (4) is fixed on the rotating shaft, and the other end of the traction rope (4) passes through the reinforcing rib (23) and the rotor base plate (21) to be connected to the polyurethane foam.

7. The high-performance triboelectric nanogenerator for sustainable collection of full-speed wind energy according to claim 5, characterized in that: A plurality of strong magnets (51) are arranged between the stator substrate (11) and the copper foil electrode (12), and the plurality of strong magnets (51) are evenly arranged in a ring shape on the upper surface of the stator substrate (11); and a soft magnet (52) that cooperates with the strong magnet (51) is attached to the upper surface of the polyurethane foam.

8. The high-performance triboelectric nanogenerator for sustainable collection of full-speed wind energy according to claim 1, characterized in that: The fan blade assembly (3) comprises a fan blade shaft (31) mounted on a rotating shaft, and a plurality of fan blades (32) are evenly arranged in the circumferential direction of the fan blade shaft (31) via connecting rods.

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