CN104214056A - Wind power generation device and wind power generation system - Google Patents
Wind power generation device and wind power generation system Download PDFInfo
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- CN104214056A CN104214056A CN201310213028.9A CN201310213028A CN104214056A CN 104214056 A CN104214056 A CN 104214056A CN 201310213028 A CN201310213028 A CN 201310213028A CN 104214056 A CN104214056 A CN 104214056A
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Wind Motors (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a wind power generation device and a wind power generation system to solve the problems that a wind power generation device in the prior art is complex in structure and high in cost. The wind power generation device comprises a supporting barrel, a transmission shaft, at least one wind power drive part and a friction power generator, wherein the transmission shaft is located inside the supporting barrel, and the top end of the transmission shaft extends out of the supporting barrel. The first end of each wind power drive part is a fixed end fixedly arranged at the top end of the transmission shaft, and the second end of each wind power drive part serves as a free end capable of driving the transmission shaft to rotate relative to the supporting barrel through the wind power. The friction power generator further comprises a first electrode layer and a second electrode layer, the first end of the first electrode layer serves as a fixed end fixedly arranged in the middle of the transmission shaft, and the second end of the first electrode layer serves as a free end capable of being bent; the second electrode layer is attached and fixed to the inner wall of the supporting barrel, and the first electrode layer makes contact with the second electrode layer.
Description
Technical Field
The invention relates to the field of electric power, in particular to a wind power generation device and a wind power generation system.
Background
With the progress of science and technology and the rapid development of industry, human needs for energy are increasing, and under the situation that available energy is decreasing day by day, human has to search for new energy. Wind energy, which is a huge energy and clean renewable energy existing in nature, has received a great deal of attention and wide use because it does not use fuel, and does not generate radiation or air pollution.
The existing wind power generation device adopts the principle that wind power drives a windmill blade to rotate, and then the rotating speed is increased through a speed increaser, so that a generator is promoted to generate electricity. The method comprises two processes of converting kinetic energy of wind into mechanical energy and then converting the mechanical energy into electric energy. There are roughly three ways to convert mechanical energy into electrical energy: electrostatic, piezoelectric, and electromagnetic. The traditional wind power generation system usually adopts an electromagnetic induction mode, the wind power generation system has large volume and high cost, and meanwhile, great inconvenience is brought to users in the transportation and installation processes; the piezoelectric type wind power generation system is difficult to realize the combination of high power and small size due to the complex chemical components and crystal structures of the conventional piezoelectric materials.
Therefore, the traditional wind power generation mode has the defect that the traditional wind power generation mode cannot be compensated by adopting an electromagnetic induction mode or a piezoelectric mode.
Disclosure of Invention
The invention provides a wind power generation device and a wind power generation system, which are used for solving the problems of complex structure and high cost of the wind power generation device in the prior art.
A wind power plant comprising: the wind driven generator comprises a support cylinder, a transmission shaft, at least one wind driven part and a friction generator, wherein the transmission shaft is positioned in the support cylinder, and the top end of the transmission shaft extends out of the support cylinder; the first end of the wind power driving part is a fixed end fixedly arranged at the top end of the transmission shaft, and the second end of the wind power driving part is a free end capable of driving the transmission shaft to rotate relative to the supporting cylinder under the action of wind power; the friction generator further comprises: the transmission shaft comprises a first electrode layer and a second electrode layer, wherein the first end of the first electrode layer is a fixed end fixedly arranged in the middle of the transmission shaft, and the second end of the first electrode layer is a free end capable of being bent; the second electrode layer is attached and fixed to the inner wall of the supporting cylinder, and the first electrode layer and the second electrode layer are in contact with each other.
A wind power generation system comprising: the wind power generation device comprises a wind power generation device body, a friction generator and an energy storage device, wherein the energy storage device is used for storing electric energy generated by the friction generator.
According to the wind power generation device and the wind power generation system provided by the invention, the friction generator is divided into the first electrode layer and the second electrode layer which are mutually independent, wherein the first electrode layer is positioned on the transmission shaft, and the second electrode layer is positioned on the inner wall of the supporting cylinder, so that when wind blows the wind power driving part to rotate, the first electrode layer positioned on the transmission shaft moves, and the second electrode layer positioned on the inner wall of the supporting cylinder keeps static, so that the two parts are mutually rubbed, and the purpose of friction power generation is achieved. Therefore, the wind power generation device provided by the invention collects wind energy through the wind power driving part, and when the wind power driving part rotates, the transmission shaft drives the first electrode layer of the friction generator to move, so that friction is generated between the first electrode layer and the second electrode layer which is relatively static. Since the wind-driven component will rotate continuously under the driving of wind (even when the wind just stops, the wind-driven component will rotate for a period of time due to inertia), when the wind-driven component rotates, the second electrode layer will continuously rub the first electrode layer. Therefore, the wind power generation device is simple in structure and low in cost, can efficiently generate electricity through friction, and obviously improves the power generation efficiency.
Drawings
FIG. 1a shows a schematic external structural view of a wind power plant according to the present invention;
FIG. 1b shows a cross-sectional internal view of a wind power plant provided by the present invention;
FIG. 2 shows a schematic diagram of an equivalent structure of a first electrode layer and a second electrode layer in one embodiment of the invention;
FIG. 3a is a schematic diagram showing a positional relationship of a first electrode layer and a second electrode layer in a triboelectric generator;
fig. 3b shows another positional relationship diagram of the first electrode layer and the second electrode layer in the triboelectric generator.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.
The invention discloses a wind power generation device and a wind power generation system, which are used for solving the problems of complex structure and high cost of the wind power generation device in the prior art.
Fig. 1a shows an external structural view of a wind power generation device provided by the present invention, and fig. 1b shows an internal sectional view of the wind power generation device provided by the present invention. As can be seen with reference to fig. 1a to 1b, the wind power generation apparatus includes: a support cylinder 11, a drive shaft 12, at least one wind driven component 13, and a friction generator consisting of a first electrode layer 141 and a second electrode layer 142.
The support cylinder 11 may be a cylindrical support cylinder, for example, a cylindrical support cylinder or a prismatic support cylinder. When the supporting cylinder is a prismatic supporting cylinder, the supporting cylinder can be in various shapes such as a quadrangular prism shape, a hexagonal prism shape and the like. The support cylinder may have other shapes such as a pyramid shape, but the present invention is not limited thereto. The material of the support tube 11 is preferably a material having mechanical support properties, for example, a polymer plastic, stainless steel, glass, ceramic, or alloy material. The transmission shaft 12 is located inside the support cylinder 11, preferably, the transmission shaft 12 is located at the central axis of the support cylinder 11, and the top end of the transmission shaft 12 protrudes from the inside of the support cylinder 11. The transmission shaft can be made of metal, ceramic or wear-resistant high polymer material with mechanical strength. In specific implementation, the positions of the support cylinder and the transmission shaft are relatively fixed, and the transmission shaft can rotate relative to the support cylinder. To achieve this, the support cylinder 11 may have a cylindrical or prismatic side wall and a bottom wall, with the drive shaft being movably connected to a central portion of the bottom wall so that the drive shaft can rotate with respect to the support cylinder; alternatively, it is also possible to make the support cylinder have only the side wall without the bottom wall, fix the bottom end of the side wall in a fixed position, and at the same time, fix a base at the central axis of the support cylinder, into which the drive shaft is inserted and freely rotatable, so that the drive shaft can rotate relative to the support cylinder. The specific fixing mode between the support cylinder and the transmission shaft is not limited, and the purpose that the transmission shaft rotates relative to the support cylinder can be achieved.
The wind power driving part 13 is mainly used for driving the transmission shaft to rotate. Specifically, the first end of the wind-driven component 13 is a fixed end fixedly arranged at the top end of the transmission shaft 12, and the second end of the wind-driven component 13 is a free end capable of driving the transmission shaft 12 to rotate relative to the support cylinder 11 under the action of wind power. For example, the free end of the wind-driven component may be realized by means of a blade of a fan, a cup of a wind cup or a blade of a wind blade, etc. Accordingly, the shape of the free end of the wind power driving part can be various shapes such as a sector, a rectangle, a circle or an arc, and the specific shape of the free end is not limited in the invention and can be adopted as long as the free end is suitable for collecting wind energy. In addition, in order to improve the efficiency of collecting wind energy and thus promote faster rotation of the transmission shaft, the number of the wind-driven parts 13 may be plural, and in this case, the included angle between every two adjacent wind-driven parts is preferably equal. In addition, in order to fix the one or more wind power driving components, a sleeve can be fixedly arranged on the transmission shaft, and the wind power driving components are fixed on the transmission shaft through the sleeve.
Under the drive of the wind power driving part, as long as wind blows, the transmission shaft can rotate relative to the supporting cylinder. Accordingly, the friction generator is divided into two parts which are independent from each other and contact with each other, one part is arranged on the transmission shaft, the other part is arranged on the supporting cylinder, so when wind blows, the part of the friction generator arranged on the transmission shaft rotates along with the transmission shaft, and the part of the friction generator arranged on the supporting cylinder is kept static, so that the friction generator and the supporting cylinder continuously rub against each other to generate electric energy.
The two parts of the triboelectric generator are described in detail below. As shown in fig. 1b, one part of the friction generator is a first electrode layer 141 on the transmission shaft, and the other part is a second electrode layer 142 on the inner wall of the support cylinder.
The second electrode layer 142 is directly attached to and fixed on the inner wall of the support cylinder 11. The first end of the first electrode layer 141 is a fixed end fixedly arranged in the middle of the transmission shaft 12, and the second end of the first electrode layer 141 is a free end capable of being bent. The first electrode layer 141 and the second electrode layer 142 are in contact with each other. Alternatively, the length of the first electrode layer 141 is greater than the distance from the transmission shaft to the inner wall of the support cylinder, and at this time, the first electrode layer 141 is bent due to the blocking of the inner wall of the support cylinder, so as to be able to contact with the second electrode layer 142 on the inner wall of the support cylinder. In addition, in order to enable the first electrode layer to be in effective contact with the second electrode layer, the first end of the first electrode layer may be fixed perpendicular to the driving shaft 12, and specifically, in order to facilitate the fixing, a fixing member, for example, a socket with a slot, or the like, may be further provided on the driving shaft 12. The first electrode layer can be made of flexible materials so as to be capable of freely bending. However, if the material of first electrode layer is too soft, when the transmission shaft was rotatory, first electrode layer will be because inertia effect excessively crooked to press close to the transmission shaft, like this, first electrode layer will be unable and be located the second electrode layer on the support section of thick bamboo inner wall and take place the contact, thereby can't reach friction power generation's effect. Therefore, the material of the first electrode layer should be moderately flexible, neither too hard nor too soft. Preferably, a layer of the support member 140 (see fig. 3a and 3 b) may be disposed on a first side surface of the first electrode layer, and then the first electrode layer is in contact with the second electrode layer through a second side surface. The main functions of the support member 140 are: the first electrode layer is supported so as to be prevented from being away from the inner wall of the support cylinder during rotation because the first electrode layer is too soft.
The structure of the friction generator will be described in detail below. In one embodiment of the invention, the first electrode layer of the triboelectric generator comprises: the first electrode and the first high polymer insulating layer that the lamination set up, the second electrode layer of friction generator includes: and the second electrode and the second high molecular polymer insulating layer are stacked, wherein the first high molecular polymer insulating layer in the first electrode layer and the second high molecular polymer insulating layer in the second electrode layer are in contact with each other. In other words, the first electrode of the first electrode layer is directly disposed on the inner wall of the supporting cylinder, and the first polymer insulating layer covers the first electrode. When the wind power generation device of the present invention includes the support member, one side surface of the second electrode in the second electrode layer is disposed on the support member, and the other side surface of the second electrode is further disposed with a second polymer insulating layer, that is: the second electrode is sandwiched between the second high molecular polymer insulating layer and the support member. When the transmission shaft rotates, the second high polymer insulating layer in the second electrode layer is in contact with the first high polymer insulating layer in the first electrode layer by setting the rotating direction of the transmission shaft.
Fig. 2 shows an equivalent structure schematic of the first electrode layer and the second electrode layer. In fig. 2, the first electrode layer is drawn as a horizontal structure for convenience of drawing, but in reality, the first electrode layer should have some curvature. As shown in fig. 2, the first electrode layer 141 in the friction generator includes a first electrode 1411 and a first polymer insulating layer 1412, and the second electrode layer 142 includes a second electrode 1421 and a second polymer insulating layer 1422.
In the structure shown in fig. 2, the first polymer insulating layer 1412 and the second polymer insulating layer 1422 serve as two friction interfaces of the friction generator, and the following describes the principle of friction power generation of the two friction interfaces specifically: when the transmission shaft rotates, the first electrode layer rotates along with the transmission shaft, and the second electrode layer is relatively static, so that the first high polymer insulating layer in the first electrode layer continuously rubs the second high polymer insulating layer in the second electrode layer, static charges are generated on the surfaces of the first high polymer insulating layer and the second high polymer insulating layer due to friction, and the capacitance between the first electrode and the second electrode is changed due to the generation of the static charges, so that a potential difference is generated between the first electrode and the second electrode. When the first electrode and the second electrode are communicated by an external circuit, the potential difference forms an alternating current pulse electrical signal in the external circuit, so that the purpose of power generation is achieved. In order to implement the external circuit, a first electrode lead 15 (see fig. 1 b) may be connected to the first electrode, and a second electrode lead 16 (see fig. 1 b) may be connected to the second electrode, and these two electrode leads may be connected to the external circuit as output terminals of the triboelectric generator. Wherein the electrode leads may be implemented by enameled copper wires.
In addition, in order to improve the power generation capability of the friction generator, a micro-nano structure may be further provided on at least one of two surfaces of the first high polymer insulating layer 1412 and the second high polymer insulating layer 1422, which are in contact with each other. Therefore, the opposite surfaces of the first high molecular polymer insulating layer and the second high molecular polymer insulating layer can be better contacted and rubbed, and more charges are induced at the first electrode and the second electrode. The micro-nano structure can be realized in two possible ways: in a first mode, the micro-nano structure is a micro-scale or nano-scale very small concave-convex structure. The concave-convex structure can increase the frictional resistance and improve the power generation efficiency. The concave-convex structure can be directly formed during film preparation, and an irregular concave-convex structure can be formed on the surface of the first high polymer insulating layer and/or the second high polymer insulating layer by using a polishing method. Specifically, the concave-convex structure may be a concave-convex structure in a shape of a semicircle, a stripe, a cube, a quadrangular pyramid, a cylinder, or the like. The second mode is that the micro-nano structure is a nano-scale porous structure, the material used for the first high molecular polymer insulating layer is preferably polyvinylidene fluoride (PVDF), the thickness of the material is 0.5-1.2mm (preferably 1.0 mm), and a plurality of nano holes are arranged on the surface of the material opposite to the second electrode layer. Wherein, the size of each nanopore, i.e. the width and the depth, can be selected according to the needs of the application, and the preferred size of the nanopore is as follows: the width is 10-100nm and the depth is 4-50 μm. The number of the nano-holes can be adjusted according to the required output current value and voltage value, and the nano-holes are preferably uniformly distributed with the hole spacing of 2-30 μm, and more preferably uniformly distributed with the average hole spacing of 9 μm.
In the above-described triboelectric generator, the first electrode or the second electrode may be a metal electrode having electrical conductivity, graphene, silver nanowire coating or other transparent conductive film (e.g., AZO, FTO), etc., or may be indium tin oxide, a metal or an alloy, wherein the metal may be gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, selenium, iron, manganese, molybdenum, tungsten, or vanadium; the alloy may be an aluminum alloy, a titanium alloy, a magnesium alloy, a beryllium alloy, a copper alloy, a zinc alloy, a manganese alloy, a nickel alloy, a lead alloy, a tin alloy, a cadmium alloy, a bismuth alloy, an indium alloy, a gallium alloy, a tungsten alloy, a molybdenum alloy, a niobium alloy, or a tantalum alloy. The first high molecular polymer insulating layer or the second high molecular polymer insulating layer can be one of polytetrafluoroethylene, PET plastic, solidified polydimethylsiloxane, polyimide film, or polyvinylidene fluoride doped with zinc oxide nanowires and having a microporous structure; alternatively, the first high molecular polymer insulating layer or the second high molecular polymer insulating layer may be one of cellulose, polyester fiber, and rayon having a microporous structure. The first polymer insulating layer and the second polymer insulating layer may be selected from aniline formaldehyde resin films, polyoxymethylene films, ethyl cellulose films, polyamide films, melamine formaldehyde films, polyethylene glycol succinate films, cellulose acetate films, polyethylene adipate films, polydiallyl phthalate films, fiber (recycled) sponge films, polyurethane elastomer films, styrene-propylene copolymer films, styrene-butadiene copolymer films, rayon films, polymethyl films, methacrylate films, polyvinyl alcohol films, polyester films, polyisobutylene films, polyurethane flexible sponge films, polyethylene terephthalate films, polyvinyl butyral films, formaldehyde phenol films, chloroprene rubber films, polyester films, polyvinyl alcohol films, polyethylene terephthalate films, polyvinyl butyral films, polyvinyl alcohol films, one of a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, an acrylonitrile-vinyl chloride film and a polyethylene propylene carbonate film. The first high molecular polymer insulating layer and the second high molecular polymer insulating layer are preferably made of different materials, so that the friction effect can be improved. The first polymer insulating layer and the second polymer insulating layer can prevent the potential difference generated between the first electrode and the second electrode from being internally neutralized. As can be seen from this, in the friction generator having the four-layer structure (the first electrode, the first polymer insulating layer, the second polymer insulating layer, and the second electrode) shown in fig. 2, power is generated mainly by friction between the polymer (the first polymer insulating layer) and the polymer (the second polymer insulating layer).
In addition, in addition to the way of implementing the friction generator by the four-layer structure shown in fig. 2, in other embodiments of the present invention, the friction generator may be implemented by other ways. For example, the first polymer insulating layer or the second polymer insulating layer in the four-layer structure may be omitted, so that the friction generator has a three-layer structure. When the first high molecular polymer insulating layer is omitted, the first electrode and the second high molecular polymer insulating layer are used as two friction interfaces of the friction generator to perform friction, and at the moment, a micro-nano structure can be arranged on at least one of two surfaces, in contact with each other, of the first electrode and the second high molecular polymer insulating layer; when the second high molecular polymer insulating layer is omitted, the second electrode and the first high molecular polymer insulating layer are used as two friction interfaces of the friction generator to perform friction, and at the moment, a micro-nano structure can also be arranged on at least one of two surfaces, in contact with each other, of the second electrode and the first high molecular polymer insulating layer, so that the power generation efficiency is improved. The power generation principle of the three-layer structure generator is similar to that of the four-layer structure, and the description is omitted here. In addition, in the three-layer structure generator, since the metal and the polymer rub each other, and the metal easily loses electrons, the energy output can be improved by rubbing the metal and the polymer.
In the friction generator with a three-layer structure, because one high-molecular polymer insulating layer is omitted, the electrode in the electrode layer without the high-molecular polymer insulating layer is required to be used as a friction electrode (namely metal) to be rubbed with the first high-molecular polymer insulating layer, so the material of the electrode can be selected from metal or alloy, wherein the metal can be gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, selenium, iron, manganese, molybdenum, tungsten or vanadium; the alloy may be an aluminum alloy, a titanium alloy, a magnesium alloy, a beryllium alloy, a copper alloy, a zinc alloy, a manganese alloy, a nickel alloy, a lead alloy, a tin alloy, a cadmium alloy, a bismuth alloy, an indium alloy, a gallium alloy, a tungsten alloy, a molybdenum alloy, a niobium alloy, or a tantalum alloy. The other electrode does not need to be rubbed, so other materials capable of manufacturing the electrode can be applied besides the listed metal or alloy materials, for example, non-metal materials such as indium tin oxide, graphene, silver nanowire films and the like can be selected. The material of the polymer insulating layer in the friction generator with the three-layer structure is the same as that in the four-layer structure, and the description thereof is omitted.
Next, specific numbers and positional relationships of the first electrode layer and the second electrode layer in the friction generator will be described.
Fig. 3a is a schematic diagram illustrating a positional relationship between a first electrode 1411 and a first polymer insulating layer 1412 included in a first electrode layer of a triboelectric generator, and a second electrode 1421 included in a second electrode layer, taking a triboelectric generator with a three-layer structure as an example, and further illustrates a support member 140. In fig. 3a, the number of the first electrode layers is three, the three first electrode layers are arranged at intervals, and the included angle between every two adjacent first electrode layers is preferably equal. The second electrode layer includes a plurality of intermittent sheet portions, the intermittent sheet portions are arranged on the inner wall of the support cylinder at intervals, and the intervals between every two adjacent sheet portions are preferably equal. In this implementation, each first electrode layer sequentially rubs against the respective intermittent sheet portions upon rotation, so that a potential difference will be generated between each first electrode layer and each intermittent sheet portion, thereby enabling efficient contact and separation between the two rubbing interfaces. In this way, one first electrode lead may be connected to each first electrode layer, respectively, and thus there are three first electrode leads in the structure shown in fig. 3 a. Correspondingly, it is also possible to connect one second electrode lead at each tab-like portion of the second electrode layer, respectively, so that in the structure shown in fig. 3a there are four second electrode leads. By adjusting the series-parallel relationship between the first electrode lead and the second electrode lead, the magnitude of the current or the voltage output by the friction generator can be changed.
Fig. 3b is a schematic diagram illustrating another positional relationship between the first electrode 1411 and the first polymer insulating layer 1412 included in the first electrode layer of the triboelectric generator, and the second electrode 1421 included in the second electrode layer, taking a triboelectric generator with a three-layer structure as an example, and further illustrates the support member 140. In fig. 3b, the number of the first electrode layers is also three, the three first electrode layers are arranged at intervals, and the included angle between every two adjacent first electrode layers is preferably equal. The second electrode layer comprises a continuous annular portion having an outer diameter equal to the inner diameter of the support cylinder so that the second electrode layer is snugly held against the inner wall of the support cylinder. In this implementation, each first electrode layer continuously rubs against the continuous annular portion during rotation, thereby generating a potential difference between each first electrode layer and the continuous annular portion, thereby ensuring continuous rubbing between the two rubbing interfaces. In this way, one first electrode lead may also be connected to each first electrode layer, so that three first electrode leads are also present in the configuration shown in fig. 3 a. Accordingly, a second electrode lead is connected at the continuous annular portion of the second electrode layer, and thus, in the structure shown in fig. 3a, there is one second electrode lead.
In the structure shown in fig. 3a and 3b, there are a plurality of first electrode leads, and since the plurality of first electrode leads cannot be fixed in position during the rotation of the transmission shaft, the wind power generation device may further include: a first electrode fixing piece 17 (see fig. 1a and 1 b)) at the bottom end of the driving shaft for fixing each first electrode lead. The first electrode fixing piece 17 and each first electrode lead are in contact with each other, not fixedly connected, so that the first electrode leads can be prevented from being knotted due to mutual winding during rotation of the driving shaft, thereby facilitating output.
Further, since the wind speed, the power demand, and the like vary, the electric energy generated by the wind power generation device may not be used up for a while, and therefore, it is necessary to store the surplus electric energy for use when the demand is excessive or the power generation amount is insufficient. Therefore, the invention also provides a wind power generation system which comprises the wind power generation device and an energy storage device, wherein the energy storage device is connected with the output end of the friction generator and is used for storing the electric energy generated by the friction generator. The structure of the energy storage device is described in detail below. Since the friction generator generates alternating current which cannot be directly stored due to the particularity of the form of the alternating current, the alternating current is converted into direct current through a series of processing and then is stored. For this purpose, the energy storage device may comprise a rectifier, a filter capacitor, a DC/DC converter and an energy storage element. The rectifier is essentially a circuit for converting alternating current energy into direct current energy, and the principle of the rectifier is to convert alternating current into unidirectional direct current pulsating voltage by utilizing the unidirectional conduction function of a diode. The output end of the rectifier is connected with a filter capacitor in a crossing mode, and the rectified direct current pulsating voltage is changed into relatively stable direct current voltage by utilizing the charge-discharge characteristics of the filter capacitor. And further, the filtered direct-current voltage is connected to a DC/DC converter, and the DC/DC converter is subjected to voltage transformation to obtain an electric signal suitable for charging the energy storage element. The alternating current generated by the friction generator has been converted into storable direct current and is finally stored in a designated energy storage element. The energy storage element can be selected from a lithium ion battery, a nickel-metal hydride battery, a lead-acid battery or a super capacitor. Therefore, the wind energy collecting device can collect the wind energy in the natural environment, convert the wind energy into the electric energy through a series of conversions, and can be directly used or store the generated electric energy through a subsequent energy storage device, thereby achieving the purpose of collecting the wind energy.
According to the wind power generation device and the wind power generation system provided by the invention, the friction generator is divided into the first electrode layer and the second electrode layer which are mutually independent, wherein the first electrode layer is positioned on the transmission shaft, and the second electrode layer is positioned on the inner wall of the supporting cylinder, so that when wind blows the wind power driving part to rotate, the first electrode layer positioned on the transmission shaft moves, and the second electrode layer positioned on the inner wall of the supporting cylinder keeps static, so that the two parts are mutually rubbed, and the purpose of friction power generation is achieved. Therefore, the wind power generation device provided by the invention collects wind energy through the wind power driving part, and when the wind power driving part rotates, the transmission shaft drives the first electrode layer of the friction generator to move, so that friction is generated between the first electrode layer and the second electrode layer which is relatively static. Since the wind-driven component will rotate continuously under the driving of wind (even when the wind just stops, the wind-driven component will rotate for a period of time due to inertia), when the wind-driven component rotates, the second electrode layer will continuously rub the first electrode layer. Therefore, the wind power generation device is simple in structure, low in cost, capable of efficiently generating electricity through friction, remarkably improving the power generation efficiency, and easy to process and cut.
In addition, the wind power generation device provided by the invention can be independently applied, and can also be applied after being integrated with systems such as wind power, photovoltaic power generation, atomic battery power generation, temperature difference power generation and the like, so that a multi-power supply system is realized.
It will be appreciated by those skilled in the art that although the steps of the method are described sequentially for ease of understanding, it should be noted that the order of the steps is not strictly limited.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
It will also be appreciated that the arrangement of devices shown in the figures or embodiments is merely schematic and represents a logical arrangement. Where modules shown as separate components may or may not be physically separate, components shown as modules may or may not be physical modules.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (15)
1. A wind power plant, characterized by comprising: a support cylinder, a transmission shaft, at least one wind-driven part and a friction generator, wherein,
the transmission shaft is positioned in the support cylinder, and the top end of the transmission shaft extends out of the support cylinder;
the first end of the wind power driving part is a fixed end fixedly arranged at the top end of the transmission shaft, and the second end of the wind power driving part is a free end capable of driving the transmission shaft to rotate relative to the supporting cylinder under the action of wind power;
the friction generator further comprises: the transmission shaft comprises a first electrode layer and a second electrode layer, wherein the first end of the first electrode layer is a fixed end fixedly arranged in the middle of the transmission shaft, and the second end of the first electrode layer is a free end capable of being bent; the second electrode layer is attached and fixed to the inner wall of the supporting cylinder, and the first electrode layer and the second electrode layer are in contact with each other.
2. The wind power plant according to claim 1, wherein the free end of the wind driven component is a wind cup and/or a wind blade.
3. The wind power generation apparatus of claim 1, further comprising: a support member disposed on a first side surface of the first electrode layer such that a second side surface of the first electrode layer and the second electrode layer contact each other.
4. The wind power generation apparatus of claim 1, wherein the first electrode layer comprises: a first electrode and a first polymer insulating layer which are stacked, the second electrode layer including: and the second electrode and the second high polymer insulating layer are stacked, wherein the first high polymer insulating layer in the first electrode layer and the second high polymer insulating layer in the second electrode layer are in contact with each other.
5. The wind power generation device according to claim 4, wherein a micro-nano structure is provided on at least one of two surfaces of the first high molecular polymer insulating layer in the first electrode layer and the second high molecular polymer insulating layer in the second electrode layer, which are in contact with each other.
6. The wind power generation apparatus of claim 1, wherein the first electrode layer comprises a first electrode, and the second electrode layer comprises: and the second electrode and the second high polymer insulating layer are stacked, wherein the first electrode in the first electrode layer and the second high polymer insulating layer in the second electrode layer are in contact with each other.
7. The wind power generation device according to claim 6, wherein a micro-nano structure is provided on at least one of two surfaces of the first electrode layer and the second high molecular polymer insulating layer in the second electrode layer, which are in contact with each other.
8. The wind power generation apparatus of claim 1, wherein the first electrode layer comprises: the electrode structure comprises a first electrode and a first high polymer insulating layer which are stacked, wherein the second electrode layer comprises a second electrode, and the first high polymer insulating layer in the first electrode layer and the second electrode in the second electrode layer are in contact with each other.
9. The wind power generation device according to claim 8, wherein a micro-nano structure is provided on at least one of two surfaces of the first high molecular polymer insulating layer in the first electrode layer and the second electrode layer in the second electrode layer, which are in contact with each other.
10. The wind power plant of any one of claims 4-9, further comprising: the first electrode lead is connected with the first electrode, the second electrode lead is connected with the second electrode, and the first electrode lead and the second electrode lead are used as output ends of the friction generator.
11. The wind power generation apparatus of claim 10, wherein the first electrode layer is plural in number.
12. The wind power generation device according to claim 11, wherein the number of the first electrode leads is equal to the number of the first electrode layers, and each first electrode layer corresponds to one first electrode lead, the wind power generation device further comprises: and the first electrode fixing sheet is positioned at the bottom end of the transmission shaft and used for fixing each first electrode lead.
13. The wind power unit according to claim 1 or 11, wherein the second electrode layer comprises a continuous annular portion having an outer diameter equal to an inner diameter of the support cylinder; or,
the second electrode layer includes a plurality of intermittent sheet portions disposed at intervals on an inner wall of the support cylinder.
14. The wind power plant of claim 1, wherein the support cylinder is a cylindrical support cylinder, the drive shaft being located at a central axis of the support cylinder.
15. A wind power generation system comprising: a wind power plant as claimed in any one of claims 1 to 14 and: the energy storage device is used for storing the electric energy generated by the friction generator.
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