阅读说明：本技术 一种基于滚动摩擦的电磁-摩擦复合型纳米发电机 (Electromagnetic-friction composite nano generator based on rolling friction ) 是由 严冬 田兴亮 张佳佳 王鹏程 欧德旭 古静 陈逸飞 李雪锋 于 2020-06-17 设计创作，主要内容包括：本发明涉及一种基于滚动摩擦的电磁-摩擦复合型纳米发电机,属于系能源技术领域。该电磁-摩擦复合型纳米发电机包括摩擦纳米发电单元、线圈式电磁感应发电单元和机械动力捕获单元。所述摩擦纳米发电单元包括滚筒电极阵列和粘附在中心滚筒外表面的摩擦电材料阵列；所述线圈式电磁感应发电单元包括线圈和中心滚筒内部的永磁体；所述机械动力捕获单元包括中心滚筒、轴杆和外部能量收集部件。本发明电磁-摩擦复合型纳米发电机,通过外部流体能量或者旋转能量的输入转化,驱动中心滚筒和滚筒电极旋转,在滚筒电极与摩擦电材料的接触和电磁感应的作用下产生交流电供给负载,实现对外部流体能量或者旋转能量的收集并转化为可用的电能。(The invention relates to an electromagnetic-friction composite nano generator based on rolling friction, and belongs to the technical field of energy. The electromagnetic-friction composite type nanometer generator comprises a friction nanometer generating unit, a coil type electromagnetic induction generating unit and a mechanical power capturing unit. The friction nano power generation unit comprises a roller electrode array and a friction electric material array adhered to the outer surface of the central roller; the coil type electromagnetic induction power generation unit comprises a coil and a permanent magnet inside the central roller; the mechanical power capture unit includes a central drum, a shaft, and an external energy harvesting component. According to the electromagnetic-friction composite nano generator, the central roller and the roller electrode are driven to rotate through the input and conversion of external fluid energy or rotation energy, alternating current is generated under the contact between the roller electrode and a triboelectric material and the action of electromagnetic induction to supply a load, and the collection of the external fluid energy or the rotation energy is realized and converted into available electric energy.)

1. An electromagnetism-friction composite nanometer generator based on rolling friction is characterized in that: the composite nano generator comprises a friction nano generating unit, a coil type electromagnetic induction generating unit and a mechanical power capturing unit;

the friction nano power generation unit comprises a roller electrode array (201) and a triboelectric material array (301) adhered to the outer surface of a central roller (303), wherein the roller electrode array (201) is in good contact with the triboelectric material array (301) and rotates along with the central roller (303);

the coil type electromagnetic induction power generation unit comprises a coil (103) and a permanent magnet (302) in a central roller (303), wherein the coil (103) is arranged on a cover plate at the bottom of the outer cylinder (101), and the permanent magnet (302) is arranged in the cover plate at the lower end of the central roller (303);

the mechanical power capturing unit comprises a central drum (303), a central drum shaft rod (304) and an external energy collecting component (102), wherein the central drum shaft rod (304) penetrates through the upper cover plate and the lower cover plate of the central drum (303) and is connected with the upper cover plate and the lower cover plate of the outer drum (101) through an outer drum bearing (104).

2. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the roller electrode arrays (201) are uniformly and symmetrically distributed on the periphery of the central roller (303), the number of the roller electrode arrays is even, every two adjacent roller electrodes (201) are connected through a circuit to form an electrode pair from the clockwise direction, and the electrode pair is an electrode I and an electrode II.

3. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 2, characterized in that: the cylinder body of the cylinder electrode (201) is made of acrylic or plastic, and copper foil or aluminum foil is adhered to the surface of the cylinder body to form the cylinder electrode (201); the upper end and the lower end of the roller electrode (201) are connected with the rotating shaft through an embedded roller bearing (202) and fixed around the central roller (303).

4. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the triboelectric material is uniformly and symmetrically adhered to the outer side surface of the central roller (303), is rectangular, the number of the triboelectric material is half of that of the roller electrodes (201), and the triboelectric material is poor in conductivity or made of an insulating film material.

5. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the coil (103) is a hollow self-adhesive coil and is placed on a bottom cover plate of the outer barrel (101); the permanent magnet (302) is a neodymium iron boron strong magnet and is placed on a bottom cover plate of the central roller (303).

6. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the central roller (303) is made of acrylic or plastic and is cylindrical, the upper cover plate and the lower cover plate are respectively provided with a round hole for being connected with a central roller shaft lever (304), and the shaft lever is made of metal.

7. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the external energy collecting component (102) consists of a wind cup or a guide wheel, is connected with the central roller (303) through a shaft rod (304), and is fixed in position through an upper cover plate and a lower cover plate of the outer barrel (101).

8. The rolling friction-based electromagnetic-friction composite nano-generator according to claim 1, characterized in that: the outer cylinder (101) is made of acrylic and is cylindrical, and a bearing is embedded in each of the circle centers of the upper cover plate and the lower cover plate and is connected with the shaft rod.

Technical Field

The invention belongs to the technical field of new energy, and relates to an electromagnetic-friction composite nano generator based on rolling friction.

Background

With the blowout type development of the microcomputer and the internet of things system, a large number of portable and distributed low-power-consumption wireless communication electronic devices are applied to smart cities or smart factories every year. One of the common features found in these devices is the need to provide power to them. However, the conventional power supply solution cannot completely meet the power supply requirement of the low-power wireless communication electronic device, and is becoming a negative factor restricting the development of the micro-electromechanical system and the internet of things system. Therefore, a new power supply solution is needed to meet the increasingly complex power supply requirements. Energy harvesting technology is receiving increasing attention over the last few years as the most promising alternative to traditional power sources. It can convert various energies in the environment into electric energy. This allows new power solutions to be freed from reliance on traditional power sources such as batteries, thereby achieving a durable, maintenance-free, self-powered power objective.

The friction nanometer generator technology is that two different materials are used for friction, so that induced charges are formed on the surface of the friction nanometer generator, and the charges are transferred through external circuit connection to generate alternating current. Due to the unique working mode, the friction nano generator is particularly suitable for low-frequency energy collection, and high-efficiency energy conversion efficiency can be realized. Meanwhile, in order to efficiently collect various energies in the environment, the composite type generator combined with different power generation forms is generated. The electromagnetic-friction composite nano generator becomes one of important research directions for efficiently collecting micro-nano energy. At present, most of electromagnetic-friction composite nano generators for collecting fluid energy or rotational energy adopt a sliding mode, and friction charges are generated through friction between rotatable blades and fixed electrodes. The friction between the blade and the electrode is sliding friction. This increases the heat loss inside the electromagnetic-friction composite nano-generator with the increase of the friction frequency, limits its excellent performance under higher frequency conditions, reduces the conversion efficiency of energy, and also affects the durability of the device.

Therefore, an electromagnetic-friction composite nano-generator based on rolling friction is needed.

Disclosure of Invention

In view of the above, the present invention is directed to provide an electromagnetic-friction composite nano-generator based on rolling friction, which realizes energy conversion output through rolling friction generated between rollers, and reduces internal heat loss.

In order to achieve the purpose, the invention provides the following technical scheme:

an electromagnetic-friction composite nano generator based on rolling friction comprises a friction nano generating unit, a coil type electromagnetic induction generating unit and a mechanical power capturing unit;

the friction nano power generation unit comprises a roller electrode array (201) and a triboelectric material array (301) adhered to the outer surface of a central roller (303), wherein the roller electrode array (201) is in good contact with the triboelectric material array (301) and rotates along with the central roller (303);

the coil type electromagnetic induction power generation unit comprises a coil (103) and a permanent magnet (302) in a central roller (303), wherein the coil (103) is arranged on a cover plate at the bottom of the outer cylinder (101), and the permanent magnet (302) is arranged in the cover plate at the lower end of the central roller (303);

the mechanical power capturing unit comprises a central drum (303), a central drum shaft rod (304) and an external energy collecting component (102), wherein the central drum shaft rod (304) penetrates through the upper cover plate and the lower cover plate of the central drum (303) and is connected with the upper cover plate and the lower cover plate of the outer drum (101) through an outer drum bearing (104).

Optionally, the roller electrode arrays (201) are uniformly and symmetrically distributed on the periphery of the central roller (303), the number of the roller electrode arrays is even, and from the clockwise direction, every two adjacent roller electrodes (201) are connected through a circuit to form an electrode pair, namely an electrode i and an electrode ii.

Optionally, the cylinder body of the roller electrode (201) is made of acrylic or plastic, and a copper foil or an aluminum foil is adhered to the surface of the cylinder body to form the roller electrode (201); the upper end and the lower end of the roller electrode (201) are connected with the rotating shaft through an embedded roller bearing (202) and fixed around the central roller (303).

Optionally, the triboelectric material is uniformly and symmetrically adhered to the outer side surface of the central roller (303), is rectangular, has a number half that of the roller electrodes (201), and is made of a poor-conductivity or insulating film material.

Optionally, the coil (103) is a hollow self-adhesive coil and is placed on a bottom cover plate of the outer cylinder (101); the permanent magnet (302) is a neodymium iron boron strong magnet and is placed on a bottom cover plate of the central roller (303).

Optionally, the central drum (303) is made of acrylic or plastic, and is cylindrical, the upper and lower cover plates are respectively provided with a circular hole for connecting with a central drum shaft lever (304), and the shaft lever is made of metal.

Optionally, the external energy collecting component (102) is composed of a wind cup or a guide wheel, is connected with the central roller (303) through a shaft rod (304), and is fixed in position through an upper cover plate and a lower cover plate of the outer barrel (101).

Optionally, the outer cylinder (101) is made of acrylic and is cylindrical, and a bearing is embedded in each of the circle centers of the upper cover plate and the lower cover plate and is connected with the shaft rod.

The invention has the beneficial effects that: the main application scene of the invention is to collect various fluid energy or rotation energy and convert the fluid energy or rotation energy into electric energy which can be used by low-power consumption electronic equipment. The rolling friction-based electromagnetic-friction composite nano generator comprises a friction nano generator which is composed of a roller electrode array and a friction material array and works in a rolling friction mode, and an electromagnetic generator which is composed of a permanent magnet and a coil. The external energy collecting component captures energy in the environment, the central roller is driven to rotate by the shaft rod, and the roller electrode rotates along with the roller electrode due to the close contact of the roller electrode and a triboelectric material on the outer side surface of the central roller. Due to the fact that the adjacent paired roller electrodes are in contact with the triboelectric material array in time sequence, potential difference exists between the electrode I and the electrode II, and current can be formed on the circuit through connection of an external circuit. Meanwhile, the permanent magnet placed on the bottom cover plate of the central roller can rotate along with the rotation of the central roller. According to the Faraday's law of electromagnetic induction, the coil generates induced electromotive force due to cutting of magnetic induction lines, and the function of electromagnetic power generation can be realized. The device utilizes the rolling friction between the roller electrode and the central roller to greatly reduce the friction resistance, reduce the waste of energy conversion and improve the durability of the device. Therefore, the electromagnetic-friction composite nano generator based on rolling friction can simultaneously realize friction power generation and electromagnetic power generation, reduce internal heat loss and expand the application scene range.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of the electromagnetic-friction composite nano-generator based on rolling friction, with the outer cylinder removed;

fig. 2 is a bottom view of a rolling friction based electromagnetic-friction hybrid nano-generator;

FIG. 3 is a structural diagram of an appearance of an electromagnetic-friction composite nano-generator based on rolling friction;

FIG. 4 is a bottom structure view of an outer cylinder of the electromagnetic-friction composite nano-generator based on rolling friction;

reference numerals:

1-housing, 101-tub, 102-external energy harvesting component, 103-coil, 104-tub bearing;

2-secondary drum, 201-drum electrode array, 202-drum bearing;

3-main drum, 301-triboelectric material array, 302-permanent magnet, 303-central drum, 304-central drum shaft.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 4, 1 is a housing, 101 is an outer cylinder, 102 is an external energy collecting member, 103 is a coil, and 104 is an outer cylinder bearing; 2 is a secondary drum, 201 is a drum electrode array, and 202 is a drum bearing; 3 is the main roller, 301 is the triboelectric material array, 302 is the permanent magnet, 303 is the central roller, 304 is the central roller shaft.

Fig. 1 is an internal three-dimensional structure of the rolling friction-based electromagnetic-friction composite nano-generator of the invention when the outer cylinder is removed, comprising: a sub drum 1 and a main drum 2. The auxiliary roller 1 is composed of a roller electrode array 201 and a roller bearing 202; the main drum 2 is composed of an array of triboelectric materials 301, permanent magnets 302, a central drum 303 and a central drum shaft 304. The cylinder bodies of the auxiliary cylinder 1 and the main cylinder 2 are both made of acrylic materials. The copper foil is adhered on the surface of the cylinder body of the auxiliary cylinder 1 to form a cylinder electrode. Starting from the clockwise direction, every two adjacent roller electrodes are connected through a circuit to form an electrode pair, namely an electrode I and an electrode II. At the same time, only the roller electrode of the electrode I or the electrode II is in close contact with the rectangular triboelectric material, and the other half is in a suspended state.

As shown in fig. 2, a bottom view of the rolling friction based electromagnetic-friction composite nano-generator includes: a tub 101, a drum electrode array 201, a drum bearing 202, a triboelectric material array 301, a permanent magnet 302, a central drum 303, and a central drum shaft 304. The outer tub 101 is made of an acryl material.

As shown in fig. 3, the appearance structure of the rolling friction-based electromagnetic-friction composite nano-generator includes: the tub 101, the central drum shaft 304 and the outer energy harvesting means 102.

As shown in fig. 4, the structure diagram of the bottom of the outer cylinder of the rolling friction based electromagnetic-friction composite nano generator includes: a coil 103 and an outer cylinder bearing 104.

As shown in fig. 1 and 3, when the external energy collecting component 102 captures external fluid energy or rotational energy, the central roller 303 is driven to rotate and also drives the roller electrode array to rotate under the driving action of the shaft. In the process, the friction force between the triboelectric material array 301 and the roller electrode array 201 is rolling friction, and simultaneously, induced charges are generated, so that a rolling friction nano-generator is formed. Different induced electromotive forces are generated between the electrode I and the electrode II due to different time of friction, and charges can be transferred in a circuit through series connection, so that alternating current is formed. Meanwhile, the permanent magnet 302 at the bottom end of the central drum 303 also rotates along with the central drum, and the coil 103 fixed at the bottom of the outer drum 101 and the permanent magnet move relatively, so that induced electromotive force can be generated at the two ends of the coil, thereby forming a rotary electromagnetic generator. The friction nano generator is characterized by high output voltage and low output current, so that the friction nano generator cannot directly drive a load; the electromagnetic generator is characterized by low output voltage, high output current and strong driving load capacity. Thus, combining the two may allow for the integration of superior characteristics to increase the overall output power of the overall power plant. Meanwhile, the friction force between the friction layers of the electromagnetic-friction composite nano generator is rolling friction force which is far smaller than sliding friction force under the same condition, so that the internal heat loss is reduced, more external energy can be converted into available electric energy, and the energy conversion efficiency of the whole device is greatly improved.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.