CN113098322B - Piezoelectric energy harvester used under complex working conditions - Google Patents

Abstract

The invention relates to the technical field related to piezoelectric energy harvesters, in particular to a piezoelectric energy harvester used under complex working conditions, which comprises an energy harvester, a positioning rod, a magnetic absorption mechanism, a connecting plate, a fixing mechanism, a guide plate, a spring, an energy generating plate, an energy expanding mechanism and a connecting shaft, wherein the energy harvester, the connecting plate, the guide plate, the spring and the energy generating plate are arranged and fixed at the middle position of the fixing mechanism in the horizontal direction from bottom to top, the rest of the magnetic absorption mechanism and the energy expanding mechanism are respectively arranged at the bottom and the top of the fixing mechanism in a bilateral symmetry manner, the positioning rod is connected above the energy harvester and is positioned at the bottom surface of the connecting plate, the connecting plate is fixed with the guide plate through the connecting shaft, two ends of the spring are respectively connected with the guide plate and the energy generating plate, and the piezoelectric energy harvester has the beneficial effects of utilizing the acoustic black hole effect to assist in enhancing the effect, the light spring in the middle amplifies the structural vibration, the whole peripheral fixing structure is used for reinforcing and positioning, and the energy harvester can work in a high-strength complex environment conveniently.

Description

A Piezoelectric Energy Harvester Used in Complex Working Conditions

technical field

The invention relates to the technical field of piezoelectric energy harvesters, in particular to a piezoelectric energy harvester used in complex working conditions.

Background technique

The development of new energy has become the mainstream of energy strategy in my country and even in the world. New energy power generation has become the theme of the future development of the power industry. In China, the new energy that can be formed mainly includes hydropower, wind energy, solar energy, geothermal energy, etc., which can be recycled. Clean energy, but these new energies will also have their corresponding shortcomings or adverse effects. For example, solar energy has a very low energy flow density, which often requires a set of collection devices and conversion equipment with a large area, and the cost is high. Secondly, Solar energy will be limited by natural conditions such as day and night, seasons, and weather factors such as sunny, cloudy, cloudy, and rainy, making solar power generation less efficient. Although there are energy harvesters based on electromagnetic principles and piezoelectric principles, such energy harvesters have low responsiveness to external stimuli, or are not suitable for corresponding energy sources, and are prone to aging after long-term use.

The acoustic black hole effect is to use the thickness of the structure to decrease in the form of a certain power function, resulting in the gradual reduction of the phase velocity of the bending wave and the gradual accumulation of energy. Reflection will occur, and the acoustic black hole effect makes the structure produce a high energy density area, so it can be efficiently applied to energy recovery and vibration noise control, but the piezoelectric energy harvester based on the acoustic black hole effect currently used is inconvenient to install the device. It is convenient to collect and expand the energy of the device, and it is inconvenient to adsorb the device to prevent falling off.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a piezoelectric energy harvester used in complex working conditions to solve the problems listed in the background art.

A piezoelectric energy harvester used in complex working conditions, comprising an energy harvester, a positioning rod, a magnetic attraction mechanism, a connecting plate, a fixing mechanism, a guide piece, a spring, an energy generating piece, an energy expansion mechanism and a connecting shaft, wherein the The energy harvester, the connecting plate, the guide piece, the spring and the energy generating piece are arranged from bottom to top and fixed at the middle position of the horizontal direction of the fixing mechanism, and the rest of the magnetic attraction mechanism and the energy expansion mechanism are respectively at the bottom of the fixing mechanism The upper part of the energy capture device is connected to the positioning rod, the positioning rod is located on the bottom surface of the connecting plate, and the connecting plate is fixed with the guide piece through the connecting shaft, so Both ends of the spring are respectively connected with the guide piece and the energy generating piece.

Further, a plurality of conductive wires are arranged around the spring, and two ends of the conductive wires are respectively connected to the guide piece and the energy generating piece.

Further, the magnetic suction mechanism further includes a clip sleeve, a magnetic suction sheet and a first fixing rod, the magnetic suction sheet is installed in the clip sleeve, and a connection plate fixed to the connecting plate is connected above the clip sleeve. The first fixed rod.

Further, the fixing mechanism includes an outer frame, a connecting block and a second fixing rod, both sides of the outer frame are welded with connecting blocks, and a second fixing rod is connected between the connecting blocks on the same side of the front and rear.

Further, an energy expansion mechanism is installed on the top surface of the energy generating piece, and the energy expansion mechanism includes an energy expansion block, a clamping block and a third fixing rod, and the clamping block is welded on the top surface of the fixing mechanism, so the The energy expansion block is fixed by a third fixing rod.

Further, the energy expansion block material is porous rigid foam, and the thickness gradually becomes thicker from the outside to the inside.

Compared with the prior art, the present invention has the following beneficial effects:

The beneficial effect of the invention is that the acoustic black hole effect is used to assist the enhancement effect, the structural vibration is amplified by the light spring in the middle, and the fixed structure around the whole is used for reinforcement and positioning, so that the energy harvester can work in a high-strength complex environment.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

2 is a schematic structural diagram of the magnetic attraction mechanism 3 of the present invention;

3 is a schematic structural diagram of the fixing mechanism 5 of the present invention;

FIG. 4 is a schematic structural diagram of the capacity expansion mechanism 10 of the present invention.

In the figure: 1. Energy harvester; 2. Positioning rod; 3. Magnetic suction mechanism; 301. Card sleeve; 302. Magnetic suction sheet; 303. The first fixing rod; Outer frame; 502. Connection block; 503. Second fixing rod; 6. Guide piece; 7. Spring; 8. Conductive wire; block; 1003. The third fixing rod; 11. The connecting shaft.

Detailed ways

In order for those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not All examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment: a piezoelectric energy harvester used in complex working conditions, including energy harvester 1, positioning rod 2, magnetic attraction mechanism 3, connecting plate 4, fixing mechanism 5, guide plate 6, spring 7, conducting wire 8, The energy generating piece 9, the expansion mechanism 10 and the connecting shaft 11, the fixing mechanism 5 is a frame structure, the guide piece 6, the spring 7, and the energy generating piece 9 are located in the middle position of the fixing mechanism 5, and the remaining components are arranged symmetrically. In addition to the fixing mechanism 5, other components such as the energy harvester 1, the positioning rod 2, the magnetic attraction mechanism 3, the connecting plate 4, the guide piece 6, the spring 7, the conductive wire 8, the energy generating piece 9 and the energy expansion mechanism 10 form a whole It can move with the expansion and contraction of the spring 7 .

The energy capture device 1 is located outside the fixing mechanism 5. The energy capture device 1 is connected to the positioning rod 2 above. The energy capture device 1 and the positioning rod 2 are threadedly connected. The function of the positioning rod 2 is to fix the energy capture device 1 in the connection. On the plate 4, a magnetic attraction mechanism 3 is provided on both sides of the energy capture device 1, a connecting plate 4 is installed above the magnetic attraction mechanism 3, and the top surface of the connecting plate 4 is connected with the guide piece 6 through the connecting shaft 11, and the guide piece 6 The upper and lower surfaces of the spring 7 are respectively connected to the spring 7 and the connecting shaft 11, and the two ends of the spring 7 are respectively in contact with the guide piece 6 and the energy generating piece 9. Conductive wires 8 are symmetrically arranged around the spring 7, and both ends of the conductive wire 8 Connect the guide piece 6 and the energy generating piece 9 respectively.

The magnetic attraction mechanism 3 includes a clamping sleeve 301 , a magnetic attraction piece 302 and a first fixing rod 303 , and the inner side of the clamping sleeve 301 is provided with a magnetic attraction piece 302 , and a first fixing rod 303 is connected above the magnetic attraction piece 302 . The ferrule 301 plays a role of clamping and fixing the magnetic sheet 302. When in use, the magnetic sheet 302 is arranged to facilitate quick positioning of the device and prevent the connecting parts from falling off. The function of the first fixing rod 303 is to fix the ferrule 301. on the connecting plate 4.

The fixing mechanism 5 includes an outer frame 501 , a connecting block 502 and a second fixing rod 503 , and both sides of the outer frame 501 are welded with the connecting blocks 502 , and the inner side of the connecting block 502 is connected with the second fixing rod 503 . The second fixing rod 503 and the connecting block 502 are threadedly connected, and the function is to fix the fixing mechanism 5 on the device that needs to capture energy, so as to further enhance the reliability of the installation.

An energy expansion mechanism 10 is installed on the top surface of the energy generating sheet 9. The energy expansion mechanism 10 includes an energy expansion block 1001, a clamping block 1002 and a third fixing rod 1003, and the clamping block 1002 is welded on the top surface of the fixing mechanism 5. The energy expansion block 1001 is fixed by a third fixing rod 1003 . The setting of the energy expansion mechanism 10 is mainly designed using the principle of acoustic black hole and dynamic vibration absorption. The energy expansion block 1001 is made of porous rigid foam, and the thickness gradually becomes thicker from the outside to the inside, which is more conducive to capturing energy from natural energy and improving work efficiency.

Working principle: First, when the energy harvester needs to be used, the magnetic attraction mechanism 3 is adsorbed and fixed on the device. If necessary, the second fixing rod 503 can be used for further fixing, so that the entire energy harvester is firmly fixed in the place where the energy harvester needs to be captured. capable device. When the acoustic black hole effect is generated to capture energy, the spring 7 vibrates rapidly and further expands, the energy expansion mechanism 10 absorbs the natural energy, generates energy for the energy generating sheet 9, and simultaneously generates energy for the guide sheet 6 through the conductive wire 8 In this way, the energy harvesting process of the piezoelectric energy harvester based on the acoustic black hole effect is completed.

The above shows are only the preferred embodiments of the present invention, of course, the scope of the rights of the present invention cannot be limited by this, and the equivalent changes made by relying on the claims of the present invention still belong to the scope covered by the present invention.

Claims (4)

1. A piezoelectric energy harvester used in complex working conditions, characterized in that it comprises an energy harvester (1), a positioning rod (2), a magnetic attraction mechanism (3), a connecting plate (4), a fixing mechanism (5) ), guide piece (6), spring (7), energy generating piece (9), energy expansion mechanism (10) and connecting shaft (11), wherein the energy capture device (1), connecting plate (4), guide The sheet (6), the spring (7) and the energy generating sheet (9) are arranged from bottom to top and fixed at the middle position of the fixing mechanism (5) in the horizontal direction, and the remaining magnetic attraction mechanism (3), energy expansion mechanism ( 10) The bottom and top positions of the fixing mechanism (5) are arranged symmetrically on the left and right, the positioning rod (2) is connected above the energy capture device (1), and the positioning rod (2) is located in the The bottom surface of the connecting plate (4), the connecting plate (4) is fixed with the guide piece (6) through the connecting shaft (11), and the two ends of the spring (7) are respectively connected with the guide piece (6) and the guide piece (6). The energy generating sheet (9) is connected; the energy expanding block (1001) is a porous rigid foam, and the thickness gradually becomes thicker from the outside to the inside; an energy expanding mechanism (10) is installed on the top surface of the energy generating sheet (9). The capacity expansion mechanism (10) includes an capacity expansion block (1001), a clamping block (1002) and a third fixing rod (1003), the clamping block (1002) is welded on the top surface of the fixing mechanism (5), and the The expansion block (1001) is fixed by the third fixing rod (1003). 2. A piezoelectric energy harvester used in complex working conditions according to claim 1, characterized in that a plurality of conductive lines (8) are arranged around the spring (7), and the conductive lines (8) The two ends of the guide piece (6) and the energy generating piece (9) are respectively connected. 3. The piezoelectric energy harvester used in complex working conditions according to claim 2, characterized in that the magnetic attraction mechanism (3) further comprises a ferrule (301), a magnetic attraction piece (302) and a first A fixing rod (303), the magnetic suction sheet (302) is installed in the ferrule (301), and a first fixing rod fixed to the connecting plate (4) is connected above the ferrule (301) (303). 4 . The piezoelectric energy harvester used in complex working conditions according to claim 3 , wherein the fixing mechanism ( 5 ) comprises an outer frame ( 501 ), a connecting block ( 502 ) and a second fixing rod ( 4 . 503), the connecting blocks (502) are welded on both sides of the outer frame (501), and a second fixing rod (503) is connected between the connecting blocks (502) on the same side of the front and rear.

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