CN113098322B

CN113098322B - Piezoelectric energy harvester used under complex working conditions

Info

Publication number: CN113098322B
Application number: CN202110549345.2A
Authority: CN
Inventors: 唐荣江; 顾昱彬; 张致远; 左迎香; 李蒙康; 唐经添
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-09-16
Anticipated expiration: 2041-05-20
Also published as: CN113098322A

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

Piezoelectric energy harvester used under complex working conditions

Technical Field

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

Background

The development of new energy has become the mainstream of energy strategy in China and even the world, the new energy power generation has become the subject of the development of future power industry, in China, the new energy which can be formed mainly comprises hydroenergy, wind energy, solar energy, geothermal energy and the like and is clean energy which can be recycled, but the new energy also has corresponding short plates or adverse effects, for example, solar energy has low energy flux density, often needs a set of collecting device and conversion equipment with quite large area, has higher manufacturing cost, and secondly, the solar energy is limited by natural conditions such as day and night, seasons and the like and is influenced by meteorological factors such as sunny, cloudy, cloud, rain and the like, so that the efficiency of solar power generation is lower. Although there are existing energy harvesters based on electromagnetic and piezoelectric principles, such energy harvesters have low responsiveness to external stimuli or are unsuitable for corresponding energy source fields, and are prone to aging after long-term use.

The acoustic black hole effect is that the phase velocity of utilizing structure thickness to reduce with certain power function form, cause the bending wave to reduce gradually and realize energy gathering gradually, thereby the bending wave velocity reduces to 0 under the ideal condition and can't transmit the structure edge, just can not take place the reflection yet, acoustic black hole effect makes the structure produce the high energy density region, consequently, can high-efficient energy recuperation and vibration noise control of being applied to, but the piezoelectricity energy harvester based on acoustic black hole effect that uses at present, be not convenient for install the device, be not convenient for carry out the energy collection to the device and enlarge, be not convenient for adsorb the device in order to prevent to drop.

Disclosure of Invention

In order to solve the technical problems, the invention provides a piezoelectric energy harvester used under complex working conditions, so as to solve the problems listed in the background technology.

The piezoelectric energy harvester comprises 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 expanding mechanism and a connecting shaft, wherein the energy harvester, the connecting plate, the guide piece, the spring and the energy generating piece are arranged and fixed at the middle position of the fixing mechanism in the horizontal direction from bottom to top, the magnetic attraction mechanism and the energy expanding mechanism are respectively arranged at the bottom and the top of the fixing mechanism in a bilateral symmetry mode, 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 piece through the connecting shaft, and two ends of the spring are respectively connected with the guide piece and the energy generating piece.

Furthermore, a plurality of conducting wires are arranged around the spring, and two ends of each conducting wire are respectively connected with the guide sheet and the energy-emitting sheet.

Furthermore, the magnetic attraction mechanism further comprises a clamping sleeve, a magnetic attraction piece and a first fixing rod, the magnetic attraction piece is arranged in the clamping sleeve, and the first fixing rod fixed with the connecting plate is connected above the clamping sleeve.

Furthermore, the fixing mechanism comprises an outer frame, connecting blocks and second fixing rods, the connecting blocks are welded on two sides of the outer frame, and the second fixing rods are connected between the connecting blocks on the same side in the front and back direction.

Furthermore, the top surface of the energy emitting piece is provided with an energy expanding mechanism, the energy expanding mechanism comprises an energy expanding block, a clamping block and a third fixing rod, the clamping block is welded on the top surface of the fixing mechanism, and the energy expanding block is fixed through the third fixing rod.

Furthermore, the energy expansion block is made of porous rigid foam, and the thickness of the energy expansion block gradually increases from outside to inside.

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

the invention has the beneficial effects that the acoustic black hole effect is utilized to assist in enhancing the effect, the structure vibration is amplified through the light spring in the middle, the whole peripheral fixed structure is used for reinforcing and positioning, and the energy harvester can work in a high-strength complex environment conveniently.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the magnetic attraction mechanism 3 according to the present invention;

FIG. 3 is a schematic structural view of the fixing mechanism 5 of the present invention;

fig. 4 is a schematic structural diagram of the energy expansion mechanism 10 of the present invention.

In the figure: 1. an energy harvester; 2. positioning a rod; 3. a magnetic attraction mechanism; 301. a card sleeve; 302. a magnetic attraction sheet; 303. a first fixing lever; 4. a connecting plate; 5. a fixing mechanism; 501. an outer frame; 502. connecting blocks; 503. a second fixing bar; 6. a guide plate; 7. a spring; 8. a conductive line; 9. a hair energy sheet; 10. an energy expanding mechanism; 1001. an energy expanding block; 1002. a clamping block; 1003. a third fixing bar; 11. and (7) connecting the shafts.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): the utility model provides a piezoelectricity energy accumulator that complicated operating mode used, includes energy accumulator 1, locating lever 2, magnetism inhale mechanism 3, connecting plate 4, fixed establishment 5, guide plate 6, spring 7, conducting wire 8, send out can piece 9, expand can mechanism 10 and connecting axle 11, and fixed establishment 5 is the frame type structure, and guide plate 6, spring 7, send out can the piece 9 and be located the intermediate position of fixed establishment 5, and all the other parts are bilateral symmetry and arrange. Besides 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 sheet 6, the spring 7, the transmission wire 8, the energy generating sheet 9 and the energy expanding mechanism 10 form a whole which can move along with the extension and contraction of the spring 7.

Energy harvesting ware 1 is located the outside of fixed establishment 5, positioning rod 2 is connected to energy harvesting ware 1's top, be threaded connection between energy harvesting ware 1 and the positioning rod 2, positioning rod 2's effect is fixed energy harvesting ware 1 on connecting plate 4, energy harvesting ware 1's both sides all are equipped with magnetism and inhale mechanism 3, connecting plate 4 is installed to magnetism inhale mechanism 3's top, connecting shaft 11 and guide piece 6 are passed through to connecting plate 4's top surface, two upper and lower faces of guide piece 6 are connecting spring 7 and connecting shaft 11 respectively, and spring 7's both ends respectively with guide piece 6 with send out can piece 9 contacts, symmetrical arrangement has conduction line 8 around spring 7, and the both ends of conduction line 8 are connected respectively and are led piece 6 and send out can piece 9.

The magnetic attraction mechanism 3 comprises a card sleeve 301, a magnetic attraction piece 302 and a first fixing rod 303, wherein the magnetic attraction piece 302 is arranged on the inner side of the card sleeve 301, and the first fixing rod 303 is connected above the magnetic attraction piece 302. The cutting ferrule 301 plays the block fixed action to the piece 302 of inhaling, and when using, the setting of the piece 302 of inhaling is convenient for fix a position the device fast, prevents that coupling part from droing, and the effect of first dead lever 303 is fixed cutting ferrule 301 on connecting plate 4.

The fixing mechanism 5 includes an outer frame 501, a connecting block 502 and a second fixing rod 503, the connecting block 502 is welded on both sides of the outer frame 501, and the second fixing rod 503 is connected to the inner side of the connecting block 502. The second fixing rod 503 is in threaded connection with the connecting block 502, and the function of the second fixing rod is to fix the fixing mechanism 5 on a device needing energy capture, so that the reliability of installation is further enhanced.

The energy expansion mechanism 10 is installed on the top surface of the energy emitting sheet 9, the energy expansion mechanism 10 comprises an energy expansion block 1001, a fixture block 1002 and a third fixing rod 1003, the fixture block 1002 is welded on the top surface of the fixing mechanism 5, and the energy expansion block 1001 is fixed through the third fixing rod 1003. The energy expansion mechanism 10 is mainly designed by adopting the acoustic black hole and dynamic vibration absorption principle, and the energy expansion block 1001 is made of porous rigid foam, so that the thickness of the energy expansion block gradually becomes thicker from outside to inside, the energy expansion block is more favorable for harvesting energy from natural energy, and the working efficiency is improved.

The working principle is as follows: firstly, when the energy harvester needs to be used, the magnetic attraction mechanism 3 is fixed on the device in an adsorption mode, and if needed, the second fixing rod 503 can be further used for fixing, so that the whole energy harvester is firmly fixed on the device needing energy harvesting. When the acoustic black hole effect is generated to capture energy, the spring 7 vibrates rapidly and expands further, the energy expansion mechanism 10 absorbs natural energy, the energy generation sheet 9 generates energy, and the energy conduction sheet 6 conducts energy through the conduction wire 8, so that the energy capture process of the piezoelectric energy harvester based on the acoustic black hole effect is completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and it is to be understood that the invention is not limited thereto, but may be modified within the scope of the appended claims.

Claims

1. The piezoelectric energy harvester used under the complex working condition is characterized by comprising an energy harvester (1), a positioning rod (2), a magnetic suction mechanism (3), a connecting plate (4), a fixing mechanism (5), a guide plate (6), a spring (7), an energy emitting plate (9), an energy expanding mechanism (10) and a connecting shaft (11), wherein the energy harvester (1), the connecting plate (4), the guide plate (6), the spring (7) and the energy emitting plate (9) are arranged and fixed at the middle position of the fixing mechanism (5) in the horizontal direction from bottom to top, the rest of the magnetic suction mechanism (3) and the energy expanding mechanism (10) are respectively arranged at the bottom and the top of the fixing mechanism (5) in a left-right symmetrical mode, the positioning rod (2) is connected above the energy harvester (1), the positioning rod (2) is positioned at the bottom surface of the connecting plate (4), and the connecting plate (4) is fixed with the guide plate (6) through the connecting shaft (11), two ends of the spring (7) are respectively connected with the guide sheet (6) and the hair energy sheet (9); the energy expansion block (1001) is made of porous rigid foam, and the thickness of the energy expansion block gradually increases from outside to inside; the energy expanding mechanism (10) is installed on the top surface of the energy emitting piece (9), the energy expanding mechanism (10) comprises an energy expanding block (1001), a clamping block (1002) and a third fixing rod (1003), the clamping block (1002) is welded to the top surface of the fixing mechanism (5), and the energy expanding block (1001) is fixed through the third fixing rod (1003).

2. The piezoelectric energy harvester used in complex working conditions according to claim 1, wherein a plurality of conducting wires (8) are arranged around the spring (7), and two ends of each conducting wire (8) are respectively connected with the corresponding conducting plate (6) and the corresponding energy generating plate (9).

3. The piezoelectric energy harvester for complex working conditions, according to claim 2, wherein the magnetic attraction mechanism (3) further comprises a sleeve (301), a magnetic attraction sheet (302) and a first fixing rod (303), the magnetic attraction sheet (302) is installed in the sleeve (301), and the first fixing rod (303) fixed to the connecting plate (4) is connected above the sleeve (301).

4. The piezoelectric energy harvester for complex working conditions, according to claim 3, wherein the fixing mechanism (5) comprises an outer frame (501), connecting blocks (502) and second fixing rods (503), the connecting blocks (502) are welded on two sides of the outer frame (501), and the second fixing rods (503) are connected between the connecting blocks (502) on the same front side and the back side.