CN107492999B - A vibration generator - Google Patents

Abstract

The invention discloses a vibration power generation device, which comprises a power generation part and a support part; the power generation part comprises a top cover, an upper permanent magnet, a magnetostrictive body wound with a coil, and a lower permanent magnet which are sequentially superimposed and fixed; the support part comprises elastic parts and base. When in use, apply pressure to the top cover, so that the upper permanent magnet, magnetostrictive body, coil and lower permanent magnet move downward together, resulting in a change in the length of the magnetic circuit, so that the coil produces a changing magnetic field. According to Faraday's law of electromagnetic induction , the induced electromotive force is generated in the coil, that is, electromagnetic power generation; when the top cover is pressed, the lower permanent magnet squeezes the base and knocks the base to close the magnetic circuit, and the reaction force generated at the same time acts on the magnetostrictive body , and according to the inverse magnetostrictive effect, a changing magnetic field is generated in the coil, and then an induced electromotive force is generated, that is, piezomagnetic power generation. The design of the device is simple, and includes two power generation processes of electromagnetic power generation and piezomagnetic power generation, so the power generation efficiency is improved.

Description

A vibration generator

technical field

The invention relates to the field of power generation, more specifically, to a vibration power generation device.

Background technique

Electric energy is a common power source, especially in summer, with the increase of various household electrical equipment, the consumption of electric energy continues to soar. There are many kinds of electric energy generation, such as relying on solar energy, wind energy, geothermal energy, etc., but the utilization of such energy is affected by external environmental factors, and the scope of application is limited. Therefore, in recent years, vibration power generation that is not affected by environmental factors has gradually become a research hotspot.

As far as the prior art is concerned, there are mainly four types of devices that generate electricity through vibration: piezoelectric, electrostatic, electromagnetic, and giant magnetostrictive. The structure of the vibration power generation device on the market is relatively complex, and the volume is large, which is contrary to the current design concept of miniaturization and wireless design of the device; and the working frequency band of this type of device is relatively high, and it is difficult to identify it in the case of small vibration, such as Stepping vibration, etc., so the application range is limited and the power generation efficiency is low.

Therefore, how to simplify the vibration power generation device and improve the power generation efficiency is an urgent problem to be solved in this field at this stage.

Contents of the invention

In view of this, the purpose of the present invention is to provide a vibration power generation device, which can simplify the vibration power generation device, improve power generation efficiency, and solve the current problems in this field.

A vibration power generation device, including a power generation part and a support part;

The power generation part includes a fixed top cover, an upper permanent magnet, a magnetostrictive body wound with a coil, and a lower permanent magnet in sequence, and the coil is used to collect electric energy;

The support part includes an elastic part and a base; the elastic part is sleeved outside the power generation part, and one end of the elastic part is fixed to the base, and the other end is connected to the top cover for supporting the The power generation part; when the top cover is pressed, the lower permanent magnet can be pressed and knocked against the base.

Preferably, the vibration power generation device further includes a sleeve and a ring seat, the sleeve is sleeved outside the elastic member, and one end of the sleeve is fixed to the base, and the other end is fixed to the ring The seat is fixed, and the top of the top cover can pass through the ring seat.

Preferably, in the vibration power generating device, the sleeve is screwed to the base.

Preferably, in the vibration power generating device, the sleeve is screwed to the ring seat.

Preferably, in the vibration power generating device, when the lower permanent magnet presses the base, the lower permanent magnet can be attached to the base.

Preferably, in the vibration power generation device, an insulating layer is provided between the coil and the upper permanent magnet.

Preferably, in the vibration power generating device, an insulating layer is provided between the coil and the lower permanent magnet.

Preferably, in the vibration power generating device, the base is provided with an annular groove, and the elastic member is fixed to the base through the annular groove.

Preferably, in the vibration power generating device, the material of the coil is copper, or aluminum, or copper alloy.

Preferably, in the vibration power generating device, the material of the magnetostrictive body is a rare earth giant magnetostrictive material.

The vibration power generation device proposed by the present invention includes a power generation part and a support part; the power generation part includes a top cover, an upper permanent magnet, a magnetostrictive body wound with a coil, and a lower permanent magnet that are sequentially superimposed and fixed; the support part includes an elastic parts and base. When in use, apply pressure to the top cover, so that the upper permanent magnet, magnetostrictive body, coil and lower permanent magnet move downward together, resulting in a change in the length of the magnetic circuit, so that the coil produces a changing magnetic field. According to Faraday's law of electromagnetic induction , the induced electromotive force is generated in the coil, that is, electromagnetic power generation; when the top cover is pressed, the lower permanent magnet squeezes the base and knocks the base to close the magnetic circuit, and the reaction force generated at the same time acts on the magnetostrictive body , and according to the inverse magnetostrictive effect, a changing magnetic field is generated in the coil, and then an induced electromotive force is generated, that is, piezomagnetic power generation. The design of the device is simple, and the above-mentioned process can occur when the top cover vibrates; and the vibration includes two power generation processes of electromagnetic power generation and piezomagnetic power generation, so the efficiency of power generation is greatly improved, and the current problem in this field is solved. problem.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is an exploded view of a vibration power generation device in a specific embodiment of the present invention.

In Figure 1:

Top cover—1, upper permanent magnet—2, coil—3, magnetostrictive body—4, lower permanent magnet—5, elastic member—6, base—7, sleeve—8, ring seat—9.

Detailed ways

The core of this specific embodiment is to provide a vibration power generation device, which can simplify the vibration power generation device, improve power generation efficiency, and solve the current problems in this field.

Hereinafter, an embodiment will be described with reference to the drawings. In addition, the examples shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solutions of the invention described in the claims.

The vibration power generation device provided in this specific embodiment mainly includes a power generation part and a support part. Wherein, the power generation part includes: a top cover 1, an upper permanent magnet 2, a magnetostrictive body 4, and a lower permanent magnet 5; The structure is superimposed and fixed in turn, and the coil 3 for collecting electric energy is wound on the magnetostrictive body 4; in actual design, materials with higher magnetic permeability can be selected for the top cover 1, base 7, sleeve 8, and ring seat 9 , such as low carbon steel, etc. The supporting part may include an elastic member 6 and a base 7; wherein, the elastic member 6 is sleeved outside the power generation unit, as shown in FIG. 1; one end of the elastic member 6 is fixed to the base 7, and the other end is connected to the top cover 1 for Supporting the power generation part, that is, supporting the whole power generation part by being fixed with the top cover 1; the elastic member 6 can be a spring or other elastic components that can play the same role. The base 7 can also be made of low carbon steel with high magnetic permeability. Please refer to Figure 1 for details.

Further, when the above-mentioned vibration power generation device is in use, pressure is applied to the top cover 1, so that the upper permanent magnet 2, the magnetostrictive body 4, the coil 3 and the lower permanent magnet 5 move downward together, resulting in a change in the length of the magnetic circuit, so that the Coil 3 produces a changing magnetic field. According to Faraday’s law of electromagnetic induction, induced electromotive force is generated in coil 3, that is, electromagnetic power generation; when pressing top cover 1, lower permanent magnet 5 squeezes the base and knocks the base, so that The magnetic circuit is closed, and the reaction force generated at the same time acts on the magnetostrictive body 4, and according to the inverse magnetostrictive effect, a changing magnetic field is generated in the coil 3, and then an induced electromotive force is generated, that is, piezomagnetic power generation. The design of the device is simple, and the above-mentioned process can occur when the top cover 1 vibrates; and the vibration includes two power generation processes of electromagnetic power generation and piezomagnetic power generation, so the efficiency of power generation is greatly improved, and the current field of problem.

It should be noted that the magnetization methods of the upper permanent magnet 2 and the lower permanent magnet 5 are both axial magnetization, and the polar positions are N-S, N-S, that is, the N pole is on the top and the S pole is on the bottom, which are arranged in the same direction.

The vibration power generating device provided in this specific embodiment may further include a sleeve 8 and a ring seat 9, and this design can further protect the internal structure of the power generating device. Wherein, the sleeve 8 is sleeved outside the elastic member 6, and one end of the sleeve 8 is fixed to the base 7, and the other end is fixed to the ring seat 9, and the top of the top cover 1 can pass through the ring seat 9, so that the top cover 1 can be pushed down. The ring seat 9 is used to connect the gap between the top cover 1 and the sleeve 8, so as to further protect the vibration power generation device and prevent the top cover 1 from falling off.

In the vibration power generation device provided in this specific embodiment, the sleeve 8 and the base 7 or the ring seat 9 can be fixed by means of welding, screwing, clamping, etc. In actual design, in order to facilitate the disassembly and assembly of the vibration power generation device , And then maintenance is convenient, can choose the mode of screw connection to fix ring seat 9, sleeve 8, base 7 three phases. The ring base 9 and the sleeve 8 are advantageously made of materials with high magnetic permeability, such as low carbon steel.

In the vibration power generation device provided in this specific embodiment, when the top cover 1 is pressed, the lower permanent magnet 5 and the base 7 can be squeezed and knocked to close the magnetic circuit, so that the magnetostrictive body 4 is pressed under the effect of being pressed. The inverse magnetostrictive effect generates a magnetic field increase in the coil 3, and according to Faraday's law of electromagnetic induction, an electromotive force will be generated in the coil 3, and this process is piezomagnetic power generation. In order to avoid the phenomenon of partial magnetic saturation in the magnetic field distribution when the lower permanent magnet 5 and the base 7 squeeze the magnetic circuit to close, thereby causing the magnetic force to decrease and the power generation efficiency to decrease, the lower permanent magnet 5 can be completely connected to the base 7 during design. Fitting together, the area of the bottom of the permanent magnet 5 is the same as the area that the base 7 can contact.

Further, in order to make the magnetic field produced by the upper permanent magnet 2 and the lower permanent magnet 5 not affect the electric energy collection of the coil 3, an insulating layer can be arranged on the upper end surface and the lower end surface of the coil 3, that is, between the upper permanent magnet 2 and the coil 3 , and an insulating layer is arranged between the lower permanent magnet 5 and the coil 3, and the insulating layer can be adhesive plaster, or other insulating materials that can play the same role.

In the vibration power generation device provided in this specific embodiment, the base 7 and the elastic member 6 can be connected by clamping, welding or other methods. In order to further facilitate the disassembly and assembly of the two, a ring groove can be set on the base 7. The ring The groove matches the bottom of the elastic piece 6, and the elastic piece 6 is fixed to the base 7 through the ring groove.

In the actual design of the vibration power generation device provided in this specific embodiment, in order to further improve the power generation efficiency, the upper permanent magnet 2 and the lower permanent magnet 5 can be made of materials with large magnetic energy products, such as NdFeB materials. Copper, aluminum, aluminum alloy and other materials can be selected to make the coil 3, so as to improve the efficiency of the coil 3 in collecting electric energy. Simultaneously, in order to further expand the scope of application of the device, a material with a response frequency band of 1-104 Hz can be selected to make the magnetostrictive body 4, so as to satisfy the normal operation of the device when the top cover 1 is lightly pressed, that is, the vibration is small, such as stepping Vibration; at this time, the device can be installed in crowded squares, parks or other places with high traffic density, and used for laying floors in such places, so as to convert stepping vibration into electrical energy as much as possible.

Further, in the actual design, the electric energy generated by the coil 3 can be connected with external electrical equipment by providing a through hole on the sleeve 8, and the electric energy can be transmitted outward, so that the device can normally supply power externally; Alternatively, the through hole may be provided at other positions such as the base.

In the vibration power generation device provided in this specific embodiment, the material of the magnetostrictive body 4 can be a rare earth giant magnetostrictive material, such as a Terfenol-D rod. The deformation of rare earth giant magnetostrictive material Terfenol-D is larger than that of ordinary magnetic materials. Compared with piezoelectric materials and traditional magnetostrictive materials, it has the following advantages: large saturation magnetostrictive strain, high energy density, and large magnetomechanical coupling coefficient , the speed of sound is low.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A vibration power generation device, characterized in that, comprising a power generation unit and a support unit; The power generation part comprises a top cover (1), an upper permanent magnet (2), a magnetostrictive body (4) wound with a coil (3), a lower permanent magnet (5), and the coil (3) is sequentially superimposed and fixed. for harvesting electrical energy; The supporting part includes an elastic part (6) and a base (7); the elastic part (6) is sleeved outside the power generation part, and one end of the elastic part (6) is fixed to the base (7) , and the other end is connected with the top cover (1) for supporting the power generating unit; when the top cover (1) is pressed, the lower permanent magnet (5) can be squeezed and knocked against the base (7). 2. The vibration power generating device according to claim 1, characterized in that it also comprises a sleeve (8) and a ring seat (9), the sleeve (8) is sleeved on the outside of the elastic member (6), and One end of the sleeve (8) is fixed to the base (7), the other end is fixed to the ring seat (9), and the top of the top cover (1) can pass through the ring seat ( 9). 3. The vibration power generating device according to claim 2, characterized in that, the sleeve (8) is screwed to the base (7). 4. The vibration power generating device according to claim 2, characterized in that, the sleeve (8) is screwed to the ring seat (9). 5. The vibration power generating device according to claim 1, characterized in that, when the lower permanent magnet (5) squeezes the base (7), the lower permanent magnet (5) can be connected to the base ( 7) fit together. 6. The vibration power generating device according to claim 1, characterized in that an insulating layer is provided between the coil (3) and the upper permanent magnet (2). 7. The vibration power generating device according to claim 1, characterized in that an insulating layer is provided between the coil (3) and the lower permanent magnet (5). 8. The vibration power generating device according to claim 1, characterized in that, the base (7) is provided with an annular groove, and the elastic member (6) is fixed to the base (7) through the annular groove. 9. The vibration power generating device according to claim 1, characterized in that, the material of the coil (3) is copper, or aluminum, or copper alloy. 10. The vibration power generating device according to claim 1, characterized in that, the material of the magnetostrictive body (4) is a rare earth giant magnetostrictive material.