Self-regulating frictional nanogenerator

Abstract

The application discloses a self-adjusting friction nanogenerator, which comprises a stator part and a rotor part. The stator part comprises a shell and a first friction part, and the first friction part is arranged on the inner wall of the shell. The rotor part comprises a first rotating shaft, an adjusting assembly and a second friction part, and the first rotating shaft is arranged in the shell. The adjusting assembly comprises a first sliding rail, a sliding rod and a buffer structure. The first end of the first sliding rail is connected to the first rotating shaft. The first end of the sliding rod is rotatably connected to the first rotating shaft, the second end of the sliding rod is movably connected to the first sliding rail, and the second end of the sliding rod can move on the first sliding rail. The first end and the second end of the buffer structure are respectively connected to the first rotating shaft and the sliding rod. The second friction part is arranged on the sliding rod, and the second friction part is in contact with the first friction part. When the first rotating shaft rotates, the first friction part and the second friction part generate electricity by friction. When the external excitation increases, the self-power generation capacity of the nanogenerator dynamically matches the external input energy, and the energy capture efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy, in particular to a self-adjusting friction nanogenerator. BACKGROUND

[0002] With the development of the Internet of Things, a large amount of information is provided by widely distributed sensors and microelectronic devices. There are tens of billions of sensor units in the world at present. The main power supply mode of these sensors is the power grid or battery. These traditional power supply modes bring huge economic burden, so it is particularly urgent to propose a new energy supply mode.

[0003] As a new emerging power generation technology, the friction nanogenerator can convert mechanical energy into electrical energy. The friction nanogenerator has the advantages of low cost, easy manufacturing, strong environmental friendliness, wide material selection range, etc., and is widely used in collecting various renewable energies in the natural environment, such as wind energy, ocean energy, vibration energy, human motion energy, etc. Based on the principle of triboelectricity and electrostatic induction coupling, the friction nanogenerator has an irreplaceable advantage in the field of low-frequency energy collection.

[0004] However, natural wind energy and water energy have the characteristics of strong randomness, and the traditional friction nanogenerator does not have the self-adjusting ability. When the input of external wind energy or water energy and other natural energy is greater than the energy required for the friction nanogenerator to start, the energy harvesting efficiency is low. SUMMARY

[0005] The embodiment of the present application provides a self-adjusting friction nanogenerator to solve the problem of low energy harvesting efficiency of the friction nanogenerator.

[0006] The embodiment of the present application provides a self-adjusting friction nanogenerator, which comprises a stator part and a rotor part. The stator part comprises a shell and a first friction member, and the first friction member is arranged on the inner wall of the shell. The rotor part comprises a first rotating shaft, an adjusting assembly and a second friction member. The first rotating shaft is arranged in the shell. The adjusting assembly comprises a first sliding rail, a sliding rod and a buffer structure. The first end of the first sliding rail is connected to the first rotating shaft, and the second end of the first sliding rail is away from the first rotating shaft. The first end of the sliding rod is rotatably connected to the first rotating shaft, and the second end of the sliding rod is movably connected to the first sliding rail. The first end of the buffer structure is connected to the first rotating shaft, and the second end of the buffer structure is connected to the sliding rod. The second end of the sliding rod can move on the first sliding rail. The second friction member is arranged on the sliding rod, and the second friction member is in contact with the first friction member. When the first rotating shaft rotates, the first friction member and the second friction member can generate triboelectricity.

[0007] According to an aspect of the present application, the first sliding rail is movably connected with a sliding block, and the sliding block is movable between the first end and the second end of the first sliding rail. The second end of the sliding rod is movably connected with the sliding block.

[0008] According to an aspect of the present application, the second rotating shaft is arranged on the sliding block, and the second end of the sliding rod is connected with the sliding block through the second rotating shaft.

[0009] According to an aspect of the present application, the first rotating shaft is provided with a first fixing member, the first fixing member is provided with a first slot, and the first end of the first sliding rail is connected in the first slot.

[0010] According to an aspect of the present application, the first rotating shaft is provided with a second fixing member, the first end of the buffer structure is connected with the second fixing member, and the second end of the buffer structure is connected with the sliding block.

[0011] According to an aspect of the present application, the first rotating shaft is rotatably provided with a second sliding rail, the sliding rod is provided with a sliding groove, the second sliding rail is matched with the sliding groove, and the sliding rod is movable relative to the second sliding rail.

[0012] According to an aspect of the present application, the first rotating shaft is provided with a third fixing member, the third fixing member is provided with a third rotating shaft, and the second sliding rail is rotatably connected with the third fixing member through the third rotating shaft.

[0013] According to an aspect of the present application, the adjusting assembly further comprises a ring structure, and the ring structure is connected with the second end of the first sliding rail.

[0014] According to an aspect of the present application, the adjusting assembly is multiple, the multiple adjusting assemblies are arranged along the circumference of the first rotating shaft, the second friction member is multiple, the multiple second friction members are correspondingly arranged on the sliding rods of the multiple adjusting assemblies, and the first friction member is multiple, and the multiple first friction members are arranged along the circumference of the shell.

[0015] According to an aspect of the present application, the material of the first friction member is a material with positive electricity, and the material of the second friction member is a material with negative electricity.

[0016] The self-adjusting friction nanometer power generation device provided by the present application can realize the dynamic matching of the power generation capacity of the power generation device and the external input energy when the external excitation increases, the sliding rod moves away from the first rotating shaft, the driving torque increases, and the contact area of the first friction member and the second friction member increases, so as to improve the capture efficiency of the power generator on natural energy such as wind energy or water energy, reduce energy loss, and improve the energy conversion efficiency of the power generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the internal structure of the self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of the regulating component of the self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a portion of the structure of the regulating component of the self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0022] Figure 5 A schematic structural diagram of a first fixing member of a self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the ring structure of the self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0024] Figure 7 A schematic structural diagram of the second slide rail of the self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0025] Figure 8 A schematic diagram of the structure of a sliding rod of a self-regulating triboelectric nano-power generation device provided in an embodiment of the present application;

[0026] Figure 9 This is a schematic structural diagram of the third fixing member of the self-regulating friction nano-power generation device provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 100-housing, 200-first friction member, 300-first rotating shaft, 400-adjusting assembly, 500-second friction member;

[0029] 301 - first fixing member, 302 - first slot, 303 - second fixing member, 304 - second slide rail, 305 - third fixing member, 306 - notch, 307 - third rotating shaft;

[0030] 401 - first sliding rail, 402 - sliding rod, 403 - buffer structure, 404 - sliding block, 405 - second rotating shaft, 406 - sliding groove, 407 - ring structure, 408 - second insertion slot. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be further described in details below with reference to the accompanying drawings and embodiments. The detailed description and the accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0032] In the description of the present application, it should be noted that, unless otherwise specified, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance; the meaning of "multiple" is two or more than two; the terms "in", "out", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] The driving torque of the existing friction nanogenerator is usually fixed. When the mechanical energy input by the outside increases, the mechanical energy lost by the generator will also increase with the increase of the rotation speed of the generator rotor, the energy capture efficiency is low, and energy is wasted.

[0034] Therefore, the embodiment of the present application provides a self-adjusting friction nanogenerator device to improve the energy capture efficiency.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 The self-adjusting friction nanogenerator device provided by the embodiment of the present application includes a stator part and a rotor part. The stator part includes a shell 100 and a first friction piece 200, and the first friction piece 200 is arranged on the inner wall of the shell 100. The rotor part includes a first rotating shaft 300, an adjusting assembly 400 and a second friction piece 500, and the first rotating shaft 300 is arranged in the shell 100.

[0036] The adjusting assembly 400 comprises a first sliding rail 401, a sliding rod 402 and a buffer structure 403. The first end of the first sliding rail 401 is connected to the first rotating shaft 300, and the second end of the first sliding rail 401 is away from the first rotating shaft 300. Specifically, the first sliding rail 401 can be arranged perpendicularly to the first rotating shaft 300. The first end of the sliding rod 402 is rotatably connected to the first rotating shaft 300, and the second end of the sliding rod 402 is movably connected to the first sliding rail 401. The first end of the buffer structure 403 is connected to the first rotating shaft 300, and the second end of the buffer structure 403 is connected to the sliding rod 402. When the first rotating shaft 300 rotates under external excitation, the adjusting assembly 400 rotates with the first rotating shaft 300. When the external excitation increases, the centrifugal force acting on the sliding rod 402 increases, and the second end of the sliding rod 402 moves away from the first end of the first sliding rail 401 to the second end of the first sliding rail 401.

[0037] The second friction member 500 is arranged on the sliding rod 402, and the second friction member 500 is in contact with the first friction member 200. When the first rotating shaft 300 rotates, the first friction member 200 and the second friction member 500 can generate triboelectricity. When the external excitation increases, the sliding rod 402 moves away from the first rotating shaft 300, that is, the sliding rod 402 moves close to the shell 100, and the contact area of the first friction member 200 and the second friction member 500 increases.

[0038] The self-adjusting friction nanometer power generation device provided by the embodiment has a self-adjusting capability. When the external excitation increases, the sliding rod 402 moves away from the first rotating shaft 300, the driving torque increases, and the contact area of the first friction member 200 and the second friction member 500 increases. The self-adjusting friction nanometer power generation device can realize dynamic matching of the power generation capacity of the power generation device itself and the external input energy, improve the capture efficiency of the power generator for natural energy such as wind energy or water energy, reduce energy loss, and improve the energy conversion efficiency of the power generator.

[0039] In specific implementation, the shell 100 can be in a conical shape. The first rotating shaft 300 can be coaxially arranged with the shell 100. The sliding rod 402 is arranged obliquely to the first rotating shaft 300. When the external excitation increases, the oblique angle of the sliding rod 402 increases. When the external excitation decreases, the oblique angle of the sliding rod 402 decreases under the pulling force of the buffer structure 403.

[0040] As a possible implementation, the adjusting assembly 400 is multiple, and the multiple adjusting assemblies 400 are arranged at intervals in the circumferential direction of the first rotating shaft 300. Specifically, the multiple adjusting assemblies 400 can be arranged at equal intervals in the circumferential direction of the first rotating shaft 300. In a specific implementation, the first sliding rails 401 of the multiple adjusting assemblies 400 are arranged at equal intervals in the circumferential direction of the first rotating shaft 300. The second friction members 500 are also multiple, and the number of the second friction members 500 can be the same as that of the adjusting assemblies 400. The multiple second friction members 500 are arranged on the sliding rods 402 of the multiple adjusting assemblies 400 correspondingly. The first friction members 200 are also multiple, and the multiple first friction members 200 are arranged at intervals in the circumferential direction of the housing 100. Specifically, the multiple first friction members 200 are arranged at equal intervals in the circumferential direction of the housing 100.

[0041] In a specific implementation, the material of the first friction member 200 can be a material with positive electricity, for example, the material of the first friction member 200 can be copper, aluminum, or other materials with positive electricity. The material of the second friction member 500 can be a material with negative electricity, for example, the material of the second friction member 500 can be FEP (fluorinated ethylene propylene copolymer), PTFE (polytetrafluoroethylene), PDMS (polydimethylsiloxane), PVC (polyvinyl chloride), or other materials with strong negative electricity. Due to the difference in the negative electricity of the materials, when the first rotating shaft 300 rotates, the first friction member 200 and the second friction member 500 rub against each other, the first friction member 200 accumulates positive frictional charge on the surface, and according to the law of conservation of charge, the second friction member 500 accumulates negative frictional charge on the surface. After the first friction member 200 is connected to an external circuit, it can provide electric energy to the external circuit, realizing the conversion of mechanical energy into electric energy.

[0042] As a possible implementation, the first sliding rail 401 movably connects with a sliding block 404, and the sliding block 404 can move between the first end and the second end of the first sliding rail 401. The second end of the sliding rod 402 is movably connected to the sliding block 404, and when the external excitation increases, the sliding rod 402 moves away from the first rotating shaft 300 together with the sliding block 404; when the external excitation decreases, the sliding rod 402 moves close to the first rotating shaft 300 together with the sliding block 404.

[0043] As shown in FIG. 4, Figure 4 In a specific implementation, the sliding block 404 is provided with a second rotating shaft 405, and the second end of the sliding rod 402 is connected to the sliding block 404 through the second rotating shaft 405, realizing the rotatable connection between the sliding rod 402 and the sliding block 404, so that the second end of the sliding rod 402 and the first sliding rail 401 are rotatable, and the first end of the sliding rod 402 and the first rotating shaft 300 are rotatable. Therefore, when the external excitation changes, the sliding rod 402 moves relative to the sliding rail together with the sliding block 404, and the inclination angle of the sliding rod 402 changes.

[0044] As shown in FIG. 4, Figure 5As shown, as a possible implementation, the first rotating shaft 300 is provided with a first fixing member 301, the first fixing member 301 has a first slot 302, and the first end of the first sliding rail 401 is connected in the first slot 302. As shown Figure 6 As shown, the adjusting assembly 400 further comprises a ring structure 407, the ring structure 407 has a second slot 408, and the second end of the first sliding rail 401 is connected in the second slot 408. The ring structure 407 can fix the relative positions of the plurality of first sliding rails 401, and the ring structure 407 can also limit the maximum stroke of the slider 404 moving away from the first rotating shaft 300, thereby ensuring the structural stability of the adjusting assembly 400.

[0045] As a possible implementation, the first rotating shaft 300 is provided with a second fixing member 303, the first end of the buffer structure 403 is connected to the second fixing member 303, and the second end of the buffer structure 403 is connected to the slider 404. Specifically, the first end of the buffer structure 403 can be connected to the second fixing member 303 by a screw or the like fixing member, and the second end of the buffer structure 403 can be connected to the second rotating shaft 405. The buffer structure 403 can adopt a spring or the like elastic member.

[0046] As shown Figure 7 As a possible implementation, the first rotating shaft 300 is rotatably connected with a second sliding rail 304. As shown Figure 8 As shown, the slide rod 402 is provided with a slide groove 406, the second sliding rail 304 cooperates with the slide groove 406, and the slide rod 402 can move relative to the second sliding rail 304. When the external excitation increases, the first end of the slide rod 402 moves away from the first rotating shaft 300, and the slide rod 402 moves relative to the slide groove 406, and the position of the whole slide rod 402 moves upward.

[0047] As shown Figure 9 As shown, in a specific implementation, the first rotating shaft 300 is provided with a third fixing member 305, the third fixing member 305 is provided with a third rotating shaft 307, and the second sliding rail 304 is rotatably connected with the third fixing member 305 through the third rotating shaft 307. Specifically, the third fixing member 305 has a notch 306, and the second sliding rail 304 is connected in the notch 306 through the third rotating shaft 307, so as to realize the rotatable connection between the second sliding rail 304 and the third fixing member 305, that is, the rotatable connection between the second sliding rail 304 and the first rotating shaft 300. The slide groove 406 cooperates with the second sliding rail 304, so as to realize the rotatable connection between the first end of the slide rod 402 and the first rotating shaft 300. It can be understood that the first end of the slide rod 402 is not limited to the end of the slide rod 402, but can be the end and the nearby section of the slide rod 402, and in actual application, it should be ensured that the slide rod 402 does not disengage from the slide groove 406 when the slide rod 402 moves relative to the slide groove 406.

[0048] Those skilled in the art will appreciate that the foregoing description is by way of example only, and is not intended to limit the scope of the application as claimed. Those skilled in the art will appreciate that various modifications and variations of the application described herein will be apparent without departing from the spirit and scope of the application. Accordingly, it should be understood that the application is intended to cover all such modifications and variations as fall within the scope of the claims and their equivalents.

Claims

1. A self-adjusting frictional nanogenerator, characterized in that, The stator part and the rotor part are included; The stator part includes a housing and a first friction element, and the first friction element is arranged on the inner wall of the housing; The rotor part includes a first rotating shaft, an adjusting assembly and a second friction element; the first rotating shaft is arranged in the housing; the adjusting assembly includes a first sliding rail, a sliding rod and a buffer structure; the first end of the first sliding rail is connected to the first rotating shaft, and the second end of the first sliding rail is away from the first rotating shaft; the first end of the sliding rod is rotatably connected to the first rotating shaft, the second end of the sliding rod is movably connected to the first sliding rail, and the second end of the sliding rod can move on the first sliding rail; the first end and the second end of the buffer structure are respectively connected to the first rotating shaft and the sliding rod; The second friction element is arranged on the sliding rod, the second friction element is flexible, and the second friction element extends radially to the first rotating shaft; the second friction element is in contact with the first friction element, and when the first rotating shaft rotates, the first friction element and the second friction element can generate static electricity by friction.

2. The self-adjusting frictional nanogenerator of claim 1, wherein, A sliding block is movably connected to the first sliding rail, and the sliding block can move between the first end and the second end of the first sliding rail. The second end of the sliding rod is movably connected to the sliding block.

3. The self-adjusting frictional nanogenerator of claim 2, wherein, A second rotating shaft is arranged on the sliding block, and the second end of the sliding rod is connected to the sliding block through the second rotating shaft.

4. The self-adjusting frictional nanogenerator of claim 1, wherein, A first fixing element is arranged on the first rotating shaft, the first fixing element has a first insertion slot, and the first end of the first sliding rail is connected in the first insertion slot.

5. The self-adjusting frictional nanogenerator of claim 2, wherein, A second fixing element is arranged on the first rotating shaft, and the first end of the buffer structure is connected to the second fixing element. The second end of the buffer structure is connected to the sliding block.

6. The self-adjusting frictional nanogenerator of claim 1, wherein, A second sliding rail is rotatably arranged on the first rotating shaft, a sliding groove is arranged on the sliding rod, the second sliding rail cooperates with the sliding groove, and the sliding rod can move relative to the second sliding rail.

7. The self-adjusting frictional nanogenerator of claim 6, wherein, A third fixing element is arranged on the first rotating shaft, a third rotating shaft is arranged on the third fixing element, and the second sliding rail is rotatably connected to the third fixing element through the third rotating shaft.

8. The self-adjusting frictional nanogenerator of claim 1, wherein, The adjusting assembly further includes a ring structure, and the ring structure is connected to the second end of the first sliding rail.

9. The self-adjusting frictional nanogenerator of claim 1, wherein, The adjusting assembly is multiple, and the multiple adjusting assemblies are arranged along the circumference of the first rotating shaft. The second friction element is multiple, and the multiple second friction elements are correspondingly arranged on the sliding rods of the multiple adjusting assemblies. The first friction element is multiple, and the multiple first friction elements are arranged along the circumference of the housing.

10. The self-adjusting frictional nanogenerator of claim 1, wherein, The material of the first friction element is a material with positive electrification, and the material of the second friction element is a material with negative electrification.

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