CN219372308U - A direct current friction nanogenerator - Google Patents

Abstract

The utility model discloses a direct-current friction nano generator, which comprises an upper disc body and a lower disc body parallel to the upper disc body; a first cylinder made of insulating material, a second cylinder made of conductive material and a third cylinder are rotatably connected between the upper disc body and the lower disc body; the outer surfaces of the second cylinder and the third cylinder are fixedly sleeved with a second friction film and a third friction film respectively; the first friction film is closely contacted with the second friction film and the third friction film, the first friction film and the second friction film are sequentially arranged from negative to positive in a triboelectric sequence. The utility model has simple structure, is beneficial to reducing the abrasion of the medium and improves the durability and the stability of the device.

Description

A direct current friction nanogenerator

technical field

The utility model relates to the field of friction nano power generation, in particular to a DC friction nano generator.

Background technique

As an emerging energy conversion device, the triboelectric nanogenerator based on contact electrification and electrostatic induction will generate periodic AC output under external force; the AC signal needs to be rectified before it can power electronic equipment; the introduction of rectification components will not only The size of the device will also reduce the energy utilization efficiency; therefore, it is necessary to develop a triboelectric nanogenerator with direct current output.

At present, the existing DC generators mainly have three modes: brush, multi-phase coupling and air breakdown; however, the above-mentioned modes all have problems with relatively complex structures: in order to solve the problem of rotating DC friction nanogenerators, brush connection must be used. Circuit; in order to change the phase of the pulse signal and achieve a stable output with a crest factor of about 1, it is necessary to construct a multi-phase rotating structure; in order to maintain stable air breakdown, it is required to precisely control the tiny gap between the charge collection electrode and the friction material.

In addition, limited by the working mechanism of contact electrification, the reciprocating friction between the dielectric layers poses a huge challenge to the stability and durability of the device.

The above-mentioned technical problems need to be solved.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a direct current friction nanometer generator, which has a simple structure, is beneficial to reduce medium wear, and improves the durability and stability of the device.

In order to achieve the above purpose, the utility model provides a DC friction nanogenerator, including an upper disc body and a lower disc body parallel to the upper disc body; the upper disc body and the lower disc body are rotatably connected by insulating The first cylinder made of material and the second cylinder and the third cylinder made of conductive material; the outer surface of the first cylinder is fixedly sleeved with the first friction film, and the outer surface of the second cylinder and the third cylinder The surface is respectively fixed with a second friction film and a third friction film; the first friction film is in close contact with the second friction film and the third friction film, and the third friction film, the first friction film and the first friction film are in close contact. The two tribofilms are arranged sequentially from negative to positive in the triboelectric sequence.

As a further improvement to the technical solution of the utility model, the second cylinder is electrically connected to the third cylinder, and a load is provided between the connection circuit between the second cylinder and the third cylinder.

As a further improvement to the technical solution of the utility model, a power input shaft is fixedly connected to the center of the first cylinder, and the power input shaft passes through a shaft hole provided on the upper disc or the lower disc.

As a further improvement to the technical solution of the utility model, the second cylinder and the third cylinder are both made of aluminum metal.

As a further improvement to the technical solution of the utility model, the second cylinder and the third cylinder are arranged in parallel on the left and right sides of the first cylinder.

As a further improvement to the technical solution of the utility model, the upper plate body and the lower plate body are provided with positioning holes for coordinating with the second cylinder and the third cylinder, and a rotating bearing is installed in the positioning holes.

As a further improvement to the technical solution of the utility model, the first friction film is made of polyester fur, the second friction film is made of nylon, and the third friction film is made of FEP.

As a further improvement to the technical solution of the utility model, the second cylinder and the third cylinder have the same diameter.

As a further improvement to the technical solution of the utility model, the diameter of the first cylinder is twice the diameter of the second cylinder and the third cylinder.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model provides a DC frictional nanogenerator. Since the first friction film is in close contact with the second friction film and the third friction film, through the action of friction force, the first cylinder can be driven when it is rotated by an external force. The second cylinder and the third cylinder rotate at the same time, and since the third friction film, the first friction film and the second friction film are sequentially from negative to positive in the triboelectric sequence, the friction between the friction films can lead to the separation of positive and negative charges And directional movement, so as to generate DC output and realize DC power generation; the utility model has a simple structure, and replaces sliding friction with rolling friction, which is beneficial to reduce medium wear and improve durability and stability of the device.

Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be apparent from the description which follows, or can be learned by practice of the invention.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the assembly drawing of the present utility model;

Fig. 3 is the structure schematic diagram of upper disc body in the utility model;

Fig. 4 is the structural representation of the first cylinder in the utility model;

Fig. 5 is the structural representation of the first friction film in the utility model;

Fig. 6 is the connection diagram of the second cylinder and the second friction film in the utility model;

Fig. 7 is the connection diagram of the third cylinder and the third friction film in the utility model;

Fig. 8 is a schematic structural view of the middle and lower plate of the present invention;

Fig. 9 is a schematic diagram of the power generation principle of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, based on The embodiments of the present utility model and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the scope of protection of the present utility model.

Example 1

As shown in Figures 1-9: a DC friction nanogenerator provided in this embodiment includes an upper plate 1 and a lower plate 2 parallel to the upper plate 1; The first cylinder 3 made of insulating material and the second cylinder 4 and the third cylinder 5 made of conductive material are connected in rotation; the outer surface of the first cylinder 3 is fixed with a first friction film 6, and the second cylinder 4. The outer surface of the third cylinder 5 is respectively fixed with the second friction film 7 and the third friction film 8; the first friction film 6 is in close contact with the second friction film 7 and the third friction film 8, and the third The friction film 8 , the first friction film 6 and the second friction film 7 are arranged sequentially from negative to positive in the triboelectric sequence.

"Up" and "Down" are subject to the orientation shown in Figure 2; the upper plate 1 and the lower plate 2 are disc structures, and are made of insulating hard materials (such as plexiglass); the first cylinder 3 and the The upper plate 1 and the lower plate 2 are coaxially arranged; the first cylinder 3 is also made of insulating hard material; the first cylinder 3 can be a hollow cylinder structure to reduce its own weight; the second cylinder 4 and the third cylinder 5 is made of hard conductive material, for example, both the second cylinder 4 and the third cylinder 5 can be made of aluminum metal to form an aluminum rod structure.

The first friction film 6, the first friction film 6 and the third friction film 8 are all cylindrical thin film structures; the triboelectric sequence refers to the various friction materials according to the difference in electrification properties (that is, which is positively charged, which is charged Negative electricity) arranged sequence; as one example, the first friction film 6 can be made of polyester fur, the second friction film 7 can be made of nylon, and the third friction film 8 can be made of FEP (fluorinated ethylene propylene copolymer thing) made.

Since the first friction film 6 is in close contact with the second friction film 7 and the third friction film 8, through the effect of friction, the first cylinder 3 can drive the second cylinder 4 and the third cylinder 5 when it is rotated by an external force Rotate at the same time, and because the third friction film 8, the first friction film 6 and the second friction film 7 are sequentially from negative to positive in the triboelectric sequence, the friction between each friction film can cause positive and negative charges to separate and move in orientation, Thereby, a DC output can be generated to realize DC power generation.

As the utilization of DC power generation, the second cylinder 4 and the third cylinder 5 are electrically connected (by wires), and a load 9 is provided between the connection circuit of the second cylinder 4 and the third cylinder 5; the load 9 can be Electronic devices that use direct current can also be energy storage devices such as capacitors.

For the convenience of power input, the center of the first cylinder 3 is fixedly connected with a power input shaft 10, and the power input shaft 10 passes through the shaft hole 11 provided in the upper disc body 1 (or lower disc body 2); the power input shaft 10 can be connected with Combined with fluid-driven equipment such as wind cups to use mechanical energy to generate electricity; bearings can be installed at the shaft holes.

The specific positions of the first cylinder 3, the second cylinder 4, and the third cylinder 5 can be determined according to needs; preferably, the second cylinder 4 and the third cylinder 5 can be arranged in parallel on the left and right sides of the first cylinder 3; The body 1 and the lower disc body 2 can be provided with a positioning hole 12 for cooperating with the second cylinder 4 and the third cylinder 5, and a rotating bearing 13 is installed in the positioning hole; the rotating bearing 13 is a metal part, and the second cylinder 4, The third cylinder 5 can be connected with wires through the rotating bearing 13, so as to realize electrical connection.

The specific specifications of the first cylinder 3, the second cylinder 4, and the third cylinder 5 can be determined as required; as preferably, the second cylinder 4 and the third cylinder 5 can have the same diameter, and the diameter of the first cylinder 3 is the first cylinder 3. Two cylinders 4, twice the diameter of the third cylinder 5.

Example 2

This embodiment provides a method for generating and discharging a DC frictional nanogenerator, wherein the structure of the DC frictional nanogenerator is the same as that of Embodiment 1, and will not be repeated here.

In this embodiment, the main process of the method is as follows:

P1. Contact electrification stage: when the power input shaft 10 drives the first cylinder 3 and the first friction film 6 to rotate, the friction between the first friction film 6, the second friction film 7, and the third friction film 8 causes positive and negative Charge separation, assuming that the second friction film 7 and the third friction film 8 rotate one circle, the first friction film 6 then rotates half a circle, and the charges are evenly distributed on the three friction films. At this time, the charges on the first friction film 6 reach saturation.

P2. Charge dissipation stage: the positive charge on the second friction film 7 and the negative charge on the third friction film 8 are dissipated to the second cylinder 4 and the third cylinder 5 respectively, and a DC output is generated through an external load 9;

P3. Charge transfer stage: the second friction film 7 and the third friction film 8 rotate one more circle, and the first friction film 6 rotates another half circle. During the rotation, the negative charge on the first friction film 6 is transferred to the second friction film 6. On the three tribofilms 8, in the same way, positive charges are transferred to the second tribofilm 7; this process shows that the first tribofilm 6 has the function of transferring charges;

P4. Circulate P1-P3 in turn to continuously generate DC output until the power input shaft 10 stops rotating.

The above are only embodiments of the present utility model, and common knowledge such as specific structures and characteristics known in the scheme are not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the utility model, some deformations and improvements can also be made, and these should also be regarded as the protection scope of the utility model, and these will not affect the utility model. Effects of novel implementations and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (9)

1. The utility model provides a direct current friction nano generator which characterized in that:

comprises an upper tray body and a lower tray body parallel to the upper tray body; a first cylinder made of insulating material, a second cylinder made of conductive material and a third cylinder are rotatably connected between the upper disc body and the lower disc body;

the outer surfaces of the second cylinder and the third cylinder are fixedly sleeved with a second friction film and a third friction film respectively; the first friction film is closely contacted with the second friction film and the third friction film, the first friction film and the second friction film are sequentially arranged from negative to positive in a triboelectric sequence.

2. A direct current friction nano generator as set forth in claim 1, wherein:

the second cylinder is electrically connected with the third cylinder, and a load is arranged between the connecting circuits of the second cylinder and the third cylinder.

3. A direct current friction nano generator as set forth in claim 1, wherein:

the center of the first cylinder is fixedly connected with a power input shaft, and the power input shaft penetrates through a shaft hole formed in the upper disc body or the lower disc body.

4. A direct current friction nano generator as set forth in claim 1, wherein:

the second cylinder and the third cylinder are made of aluminum metal.

5. A direct current friction nano generator as set forth in claim 1, wherein:

the second cylinder and the third cylinder are arranged on the left side and the right side of the first cylinder in parallel.

6. A direct current friction nano generator according to any one of claims 1 to 5, wherein:

the upper disc body and the lower disc body are provided with positioning holes for being matched with the second cylinder and the third cylinder for positioning, and a rotating bearing is arranged in each positioning hole.

7. A direct current friction nano generator according to any one of claims 1 to 5, wherein:

the first friction film is made of polyester fur, the second friction film is made of nylon, and the third friction film is made of FEP.

8. A direct current friction nano generator according to any one of claims 1 to 5, wherein:

the second cylinder and the third cylinder have the same diameter.

9. The direct current friction nano generator of claim 8, wherein:

the diameter of the first cylinder is one time of the diameters of the second cylinder and the third cylinder.