CN108429483B - Friction nanometer generator with spiral folding elastic structure - Google Patents
Friction nanometer generator with spiral folding elastic structure Download PDFInfo
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- CN108429483B CN108429483B CN201810064164.9A CN201810064164A CN108429483B CN 108429483 B CN108429483 B CN 108429483B CN 201810064164 A CN201810064164 A CN 201810064164A CN 108429483 B CN108429483 B CN 108429483B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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Abstract
The invention relates to the field of electrostatic friction and energy conversion, in particular to a friction nano generator with a spiral folding elastic structure. The generator adopts a spiral folding elastic structure, so that the friction layer of each generating unit can be synchronously contacted and separated, and the first friction layer can be in double-sided contact, so that the double-time electric charge amount is transferred in unit time, and the generator is mainly used for solving the technical problems of small output power and unstable output performance in the vibration or reciprocating motion process.
Description
Technical Field
The invention relates to the field of electrostatic friction and energy conversion, in particular to a friction nano generator with a spiral folding elastic structure.
Background
Energy problems are one of the major problems affecting human progress and sustainable development, and various researches around development of new energy and recycling of renewable energy are actively conducted around the world; the friction nanometer generator with the spiral folding elastic structure just meets the above concept; electrostatic friction generators based on triboelectric effect and electrostatic induction principle have achieved a great deal of research results under the continuous efforts of numerous scientific teams such as wangzhong forest team, and electrostatic friction generators based on periodic vertical contact-separation, in-plane sliding, rotation or piezoelectric effect have been successfully used for collecting mechanical energy; the Chinese patent application with the application number of 201310021766.3 discloses a folding type micro vibration generator and a manufacturing method thereof, two friction units are contacted and separated through a common folding structure, charges are generated, but the two friction units of the friction generator in the form can not be automatically separated and restored to the original state after being contacted, the charge density is small, and the output power is low; the Chinese patent application with the application number of 201710010956.3 discloses a friction nano-generator with an elastic structure, two layers of an elastic substrate are mutually close to and separated through a serpentine-bent multilayer folding structure, alternating current signals are generated between a first layer and a second layer, and the electric signals of a plurality of generating units are rectified, combined and then connected in parallel to form current output; the chinese patent application with application number 201710484297.7 discloses a multilayer flexible folding friction generator, but its friction layers are all single-sided contact, the obtained charge density per unit area is small, and the output current is low; the invention adopts a spiral folding elastic structure, so that the friction layer of each power generation unit can realize synchronous contact and separation, and adopts a double-sided micro-nano scale structure to ensure that the friction layer is in double-sided contact, thereby transferring twice the charge amount in unit time, and further improving the current output; the friction nanometer generator with the spiral folding elastic structure and the double-sided micro-nano scale structure can be suitable for the vibration frequency of a wide waveband, so that the application range is wide.
Disclosure of Invention
The technical problem solved by the invention is as follows: the utility model provides a novel friction nanometer generator based on spiral folding elastic construction, this generator adopts spiral folding elastic construction can make every power generation unit's frictional layer can both realize synchronous contact and separation to can make the two-sided contact of first frictional layer, make the twice electric charge amount of transfer in the unit interval, mainly used for solve vibration or reciprocating motion in-process output less and the unstable technical problem of output performance.
The invention provides a friction nano generator with a spiral folding elastic structure, which is characterized by comprising an upper supporting plate, a lower supporting plate, a friction power generation unit between the upper supporting plate and the lower supporting plate and an elastic component connected with the upper supporting plate and the lower supporting plate, wherein the friction power generation unit is formed by alternately combining a spiral substrate and a sandwich substrate by a spiral folding method; the sandwich substrate is used as a second friction unit, and the middle metal layer is used as a second electrode layer and the friction layers arranged at the two sides of the metal layer are used as second friction layers; combine spiral base and sandwich base alternate through spiral folding mode for first friction unit and second friction unit face-to-face contact, wherein every friction unit openly is another friction unit with what the back contacted, go up backup pad and bottom suspension fagging and be the stress surface when the friction nanometer generator during operation receives external vibration or reciprocating motion, the elasticity that the elastic component provided supplementary resilience makes mechanical vibration or reciprocating motion continuously go on, first friction unit and second friction unit do the separation motion of mutual contact under the exogenic action.
Preferably, the first electrode layer and the second electrode layer are metal conductive layers with weak electron-binding capacity; the second friction layer is a non-metal insulating layer with strong electron-binding capability.
Preferably, the spiral substrate which is the first electrode layer and the first friction layer and the second electrode layer are made of films of aluminum, copper or copper-aluminum alloy in any proportion, and the thicknesses of the films are 50 micrometers-lmm; the second friction layer is made of polytetrafluoroethylene, and the thickness of the second friction layer is 50 mu m-lmm.
Preferably, the support plate is an acrylic plate.
Preferably, the first friction unit and the second friction unit are arranged face to face through a spiral folding structure, the contact areas are equal, the friction electrode sequences of the first friction layer and the second friction layer are different, and the larger the difference, the better the effect is.
The friction nanometer generator with the spiral folding elastic structure enables the first friction unit and the second friction unit to be continuously contacted and separated under the action of external vibration or reciprocating motion and the auxiliary force of the spring, so that the first friction layer and the second friction layer with larger friction characteristic difference generate positive and negative static charges, and the static charges are induced to enable the friction layers to form a potential difference between corresponding electrodes to be connected with an external load to generate current.
The output characteristic of the friction nanometer generator with the spiral folding elastic structure is determined by the number of friction units, reciprocating motion or vibration frequency, effective friction area of friction layers, material characteristics of the two friction layers and other factors.
The friction nano generator with the spiral folding elastic structure has the characteristics of large output current, high output voltage, simple structure principle, low manufacturing cost, wear resistance, durability, stable output performance, capability of controlling the output current and voltage by adjusting the number of friction layers and the like, and the friction nano generator with the structure can effectively collect energy generated by vibration and reciprocating motion in the surrounding environment.
Compared with the prior art, the invention has the advantages that;
1. the design of spiral folding type multilayer contact is structurally realized through two friction layers, the friction layers are ensured to be strictly contacted and separated at the same time, the output performance of each friction layer is ensured to be synchronous and consistent, the stability of the output current and voltage of the friction generator is greatly improved, and the design of the spiral folding type elastic structure is in a limited space
2. Under the action of the spiral folding structure, the first friction layer is contacted with two sides, and double electric charge quantity is transferred in unit time, so that the current in unit time is increased. The friction nano generator has the characteristics of simple and compact structure, simple and convenient preparation method, large output power and the like, and has wide application prospects in the fields of vehicle-mounted sensor power supply, large-scale equipment health condition monitoring and the like.
Drawings
The above and other objects, features and advantages of the present invention will be more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a structural schematic diagram of a spiral-folded elastic structure friction nano-generator of the present invention, wherein fig. 1(a) is a general structural schematic diagram, and fig. 1(b) is a three-dimensional structural schematic diagram hiding an upper support plate.
FIG. 2(a) is a schematic structural diagram of a sandwich substrate according to the present invention; fig. 2(b) is a schematic structural view of the spiral substrate of the present invention.
FIGS. 3(a) - (d) are schematic diagrams of the folding process of the spiral substrate and the sandwich substrate of the present invention; FIGS. 3(e) and (f) are schematic diagrams of the stretched-out three-dimensional structure of the spiral substrate and the sandwich substrate of the present invention after folding and combining.
Fig. 4 is a working principle diagram of a general vertical contact-separation type friction nanogenerator. Fig. 4(a) is an operation schematic diagram in the case of contact, and fig. 4(b) is an operation schematic diagram in the case of separation.
Fig. 5 is a working principle diagram of the friction nano-generator with the spiral folding elastic structure. Fig. 5(a) is an operation schematic diagram in the case of contact, and fig. 5(b) is an operation schematic diagram in the case of separation.
The following are explanations and illustrations of respective reference numerals in the drawings 1, a frictional electricity generating unit, 2, an upper support plate, 3, a spring, 4, a lower support plate, 5, a sandwich substrate, 6, a spiral substrate, 7, a second friction layer, 8, a second electrode layer 9, a sandwich folded substrate 10, a spiral folded substrate
Detailed Description
The present invention provides a friction nanogenerator capable of simultaneously contacting and separating friction units and obtaining a spiral-folded elastic structure with twice charge density. The friction nanogenerator includes a plurality of friction units having a spiral-folded structure, and can be simultaneously contacted and separated by an elastic member.
In order to facilitate understanding of the technical solutions of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings.
Referring to fig. 1, the friction nanogenerator with the spiral folding elastic structure according to the embodiment includes a friction electricity generating unit 1, an upper support plate 2, a plurality of springs 3, and a lower support plate 4. The friction power generation unit is formed by alternately folding a sandwich substrate 5 and a spiral substrate 6 by a spiral folding method; wherein the sandwich substrate 5 is formed by a metal film as a second electrode layer 8 and a plurality of PTFE films on the front and back surfaces of the metal film as a second friction layer 7, as shown in fig. 2 (a); wherein the spiral substrate 6 is made of a metal thin film as both an induction electrode layer and a friction layer, as shown in fig. 2 (b); wherein the sandwich substrate 5 and the spiral substrate 6 are alternately combined together by a spiral folding method to obtain a sandwich folded substrate 9 and a spiral folded substrate 10. The process is shown in fig. 3, firstly, aligning and crosswise overlapping two substrates at one end, enabling a sandwich substrate 5 to be on the upper side and a spiral substrate 6 to be on the lower side, pasting the two substrates together by using environment-friendly resin glue (shown in fig. 3 a), then folding the spiral substrate 6 to the left according to a dotted line (shown in fig. 3b), then folding the sandwich substrate 5 to the lower side according to the dotted line (shown in fig. 3c), and folding the two substrates 5 and 6 alternately in a crossed mode by the same way, pasting the two substrates together by using environment-friendly resin glue when the last layers 5 and 6 are in contact, finally, as shown in fig. 3e, when the sandwich substrate 5 stretches up and down, the spiral substrate 6 is in a spiral folding structure, the structure is shown in fig. 3e and f, and meanwhile, the sandwich substrate 5 becomes a sandwich folding; the spiral folding structure ensures that the substrate contacted with both sides of any one surface of the two substrates is the other substrate. The upper surface and the lower surface of the spiral folding combination are adhered to the central positions of the upper support plate and the lower support plate through environment-friendly resin adhesive, the spring 3 is introduced, the two ends of the spring 3 are fixed on the upper support plate 2 and the lower support plate 4, and under the action of vibration or reciprocating external force, the sandwich folding substrate and the spiral folding substrate in the spiral folding combination are synchronously contacted and separated to generate friction static charges. The invention adopts the spiral folding elastic structure to ensure that all friction layers synchronously contact and separate, thereby increasing the contact and separation quantity of the friction layers; and the spiral folding substrate is used as a friction layer and an induction electrode layer to carry out double-sided contact, and twice electric charge quantity is transferred in unit time, so that the output performance of the generator is greatly improved by combining the two characteristics, and the stability of the generator is superior to that of a generator with a similar structure.
In this embodiment, the induction electrode is made of a metal material, the selected metal material includes copper, aluminum or copper-aluminum alloy of any proportion of the copper and the aluminum, and the upper support plate 2 and the lower support plate 4 are both acrylic plates.
In this embodiment, the material of the second friction layer 7 is an insulating material such as polytetrafluoroethylene. The appearance, the material and the size of the friction layer of the spiral folding type friction nano generator can be adjusted, and the appearance can be selected from a plane rectangle, a plane square and the like.
The working principle of the friction nanometer generator with the spiral folding elastic structure in the embodiment is as follows: under the reciprocating external force or vibration environment with any frequency, the front and back surfaces of the spiral folding substrate and the two groups of second friction layers 7 are contacted and separated with each other at the same time, and because each friction layer material can form chemical bonds on a certain part of the surface when in contact, charges are transferred from one surface to the other surface to balance the electrochemical potential difference of the two surfaces. The nano generator of the invention has the advantages that the two sides of the spiral folding substrate are contacted with the second friction layer 7, so that twice of charge quantity can be transferred to the surface of the spiral folding substrate when the spiral folding substrate is contacted, and the output performance is improved. As shown in fig. 4 and 5, we can easily obtain that the friction nano-generator of the present invention transfers twice the amount of charge on the induction electrode by comparing the working principle diagrams of the normal vertical contact friction nano-generator and the friction nano-generator of the present invention when in contact and separation.
Therefore, the friction nano generator with the spiral folding elastic structure has the advantages of simple structure, convenience in manufacturing, low cost, high output power, stable output performance and the like. Meanwhile, the generator can adjust the number of friction layers through structural change, so that the output performance of the generator can be controlled; the generator can transfer twice the amount of charge per unit time by double-sided contact of the friction layer, resulting in higher output. The friction nanometer generator with the spiral folding elastic structure and the double-sided micro-nano scale structure can be suitable for the vibration frequency of a wide waveband, so that the application range is wide.
The foregoing embodiments illustrate the principles, principal features and advantages of the invention, and it will be understood by those skilled in the art that the invention is not limited to the foregoing embodiments, which are merely illustrative of the principles of the invention, and that various changes and modifications may be made therein without departing from the scope of the principles of the invention.
Claims (7)
1. The friction nano generator with the spiral folding elastic structure is characterized by comprising an upper supporting plate, a lower supporting plate, a friction power generation unit and an elastic component, wherein the friction power generation unit is arranged between the upper supporting plate and the lower supporting plate, the elastic component is connected with the upper supporting plate and the lower supporting plate, and the friction power generation unit is formed by alternately combining a spiral substrate and a sandwich substrate through a spiral folding method; the sandwich substrate is used as a second friction unit, and the middle metal layer is used as a second electrode layer and the friction layers arranged at the two sides of the metal layer are used as second friction layers; combine spiral base and sandwich base alternate through spiral folding mode for first friction unit and second friction unit face-to-face contact, wherein every friction unit openly is another friction unit with the back contact, go up the stress surface when backup pad and bottom suspension fagging receive external vibration or inside reciprocating motion when rubbing nanometer generator during operation, the elasticity subassembly provides the elasticity of supplementary resilience and makes the mechanical vibration of external vibration or inside reciprocating motion go on constantly, and first friction unit and second friction unit do the separation motion of mutual contact under the exogenic action.
2. The helical folded spring structured triboelectric nanogenerator of claim 1, wherein the first electrode layer and the second electrode layer are metal conductive layers with weak ability to bind electrons; the second friction layer is a non-metal insulating layer with strong electron-binding capability.
3. The friction nanogenerator with a spiral folding elastic structure as claimed in claim 1, wherein the spiral substrate and the second electrode layer which are both the first electrode layer and the first friction layer are made of films of aluminum, copper or copper-aluminum alloy in any proportion, and the thickness of the films is 50 μm-lmm; the second friction layer is made of polytetrafluoroethylene, and the thickness of the second friction layer is 50 mu m-lmm.
4. The helical folded spring structured triboelectric nanogenerator of claim 1, wherein the support plate is an acrylic plate.
5. The spiral-folded elastic structure friction nanogenerator according to claim 1, wherein the first friction unit and the second friction unit are arranged face to face through the spiral-folded structure, the contact areas are equal, the friction electrode sequences of the first friction layer and the second friction layer are different, and the larger the difference is, the better the effect is.
6. The spiral-folded elastic structure friction nanogenerator according to claim 1, wherein the spiral-folded elastic structure friction nanogenerator continuously contacts and separates the first friction unit and the second friction unit under the action of external vibration or internal reciprocating motion and spring assistance force, so that the first friction layer and the second friction layer with larger friction characteristic difference generate positive and negative static charges, and the static charges are induced to form a potential difference between the corresponding electrodes of the friction layers, and are connected with an external load to generate current.
7. The friction nanogenerator with a spiral-folded elastic structure according to claim 1, wherein the spiral substrate and the sandwich substrate are alternately combined together by a spiral folding method by the following steps: firstly, aligning and crosswise overlapping one end of a sandwich substrate and one end of a spiral substrate, wherein the sandwich substrate is arranged on the upper side, the spiral substrate is arranged on the lower side, the sandwich substrate and the spiral substrate are adhered together by environment-friendly resin glue, then the spiral substrate is folded towards the left side according to a dotted line, then the sandwich substrate is folded downwards according to the dotted line, the sandwich substrate and the spiral substrate are alternately folded in a crosswise way by parity of analogy, the sandwich substrate and the spiral substrate are adhered together by environment-friendly resin glue when the last layer of sandwich substrate is contacted with the spiral substrate, the sandwich substrate is of a spiral folding structure when extending upwards and downwards, and the sandwich substrate is changed into a sandwich folding substrate, and the; the substrate contacted with both sides of any one surface of the two substrates is ensured to be the other substrate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810064164.9A CN108429483B (en) | 2018-01-23 | 2018-01-23 | Friction nanometer generator with spiral folding elastic structure |
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| CN201810064164.9A CN108429483B (en) | 2018-01-23 | 2018-01-23 | Friction nanometer generator with spiral folding elastic structure |
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| CN109194187A (en) * | 2018-11-05 | 2019-01-11 | 浙江大学 | Contact-type frictional generated energy collection device based on paper folding spring structure |
| CN109474200B (en) * | 2018-12-28 | 2024-02-23 | 重庆大学 | Friction generator based on miura-ori folding and having piezoelectric enhancement effect |
| CN110492777A (en) * | 2019-08-30 | 2019-11-22 | 河南师范大学 | A kind of helical form triboelectricity device based on 3D printing technique production |
| CN111664875B (en) * | 2020-05-27 | 2022-05-20 | 江苏大学 | Self-powered sliding sensor with surface microtexture and variable contact area structure |
| CN115001306A (en) * | 2022-06-29 | 2022-09-02 | 哈尔滨工业大学 | Light-weight triboelectric nano-generator based on paper folding structure and application thereof |
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| CN103780133B (en) * | 2013-07-22 | 2015-11-25 | 北京纳米能源与系统研究所 | A kind of impulse generator based on sliding friction and electricity-generating method |
| KR101719178B1 (en) * | 2015-03-17 | 2017-03-27 | 한국생산기술연구원 | Insole with power generator and manufacturing method of the same |
| CN107342702A (en) * | 2017-06-23 | 2017-11-10 | 河南师范大学 | A kind of collapsible friction generator of layer flexible |
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Inventor after: Cheng Guanggui Inventor after: Liu Qi Inventor after: Ding Jianning Inventor after: Zhang Zhongqiang Inventor after: Li Kai Inventor after: Wu Yesheng Inventor before: Cheng Guanggui Inventor before: Wu Yesheng Inventor before: Ding Jianning Inventor before: Zhang Zhongqiang Inventor before: Li Kai Inventor before: Liu Qi |
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