CN113193785A - One-way broadband piezoelectric power generation device - Google Patents
One-way broadband piezoelectric power generation device Download PDFInfo
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- CN113193785A CN113193785A CN202110549278.4A CN202110549278A CN113193785A CN 113193785 A CN113193785 A CN 113193785A CN 202110549278 A CN202110549278 A CN 202110549278A CN 113193785 A CN113193785 A CN 113193785A
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052802 copper Inorganic materials 0.000 claims abstract description 55
- 239000010949 copper Substances 0.000 claims abstract description 55
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
本发明公开了一种单向宽频压电发电装置，包括发电装置和固定装置两个部分构成。发电装置主要由配重螺栓螺母、压电片和螺旋铜片基板构成；固定装置主要由外壳1、外壳套、底座、卡扣、卡扣螺栓螺母和外壳2等部件构成。发电装置起到吸收固定装置传导过来的振动能量并转化为电能的作用，压电片通过贴合螺旋铜片基板来固定，二者都呈螺旋形，能够很好地垂直于上下表面振动发电，配重螺栓螺母用来调节发电装置的固有频率，使得十片发电装置固有频率在目标频率范围内线性分布，来达到较宽频带范围内振动能量吸收的效果。当底座振动时，十片发电装置通过并联共同振动发电，来达到单方向宽频发电的效果，有效促进了能源的回收利用。The invention discloses a one-way broadband piezoelectric power generating device, which comprises two parts: a power generating device and a fixing device. The power generation device is mainly composed of counterweight bolts and nuts, piezoelectric sheets and spiral copper sheet substrates; the fixing device is mainly composed of shell 1, shell sleeve, base, clips, clip bolts and nuts and shell 2 and other components. The power generation device plays the role of absorbing the vibration energy transmitted from the fixing device and converting it into electrical energy. The piezoelectric sheet is fixed by attaching the spiral copper sheet substrate. Both of them are spiral-shaped and can vibrate well perpendicular to the upper and lower surfaces to generate electricity. The counterweight bolt and nut are used to adjust the natural frequency of the generator, so that the natural frequency of the ten-piece generator is linearly distributed within the target frequency range to achieve the effect of vibration energy absorption in a wide frequency range. When the base vibrates, the ten pieces of power generation devices vibrate in parallel to generate power together to achieve the effect of unidirectional broadband power generation, which effectively promotes the recycling of energy.
Description
Technical Field
The invention relates to a device for collecting unidirectional vibration energy by using a spiral piezoelectric patch, which can effectively collect unidirectional vibration energy in the environment and belongs to the field of piezoelectric power generation and renewable environment-friendly new energy.
Background
With the progress of the times and the progress of science and technology, energy occupies a considerable position in the industrial production of people, but with the development of the field of piezoelectric power generation, vibration energy in the environment is gradually developed and utilized by people, the piezoelectric power generation has a series of advantages of environmental protection, green, simple structure, convenient processing and manufacturing, no electromagnetic interference, strong working stability and the like, can widely meet the power consumption requirement of low-power-consumption products, and has great effect in the fields of inconvenient wiring or inconvenient battery replacement. The common piezoelectric power generation mode is to generate electricity by adopting the cantilever beam type piezoelectric power generation piece, but the cantilever beam type piezoelectric power generation piece needs a larger space to continuously vibrate, and when the environmental space is limited, a plurality of power generation pieces need to be connected in parallel to enhance the power generation effect, and only when the unilateral has larger vibration energy, the traditional cantilever beam type piezoelectric power generation is difficult to apply.
The piezoelectric power generation device has the advantages that a plurality of related inventions are used for generating power by utilizing a piezoelectric power generation principle, but the piezoelectric power generation device still has a larger blank for maintaining higher frequency bandwidth and efficiently generating power in an environment with small space and unidirectional vibration.
Disclosure of Invention
The invention aims to provide a high-efficiency piezoelectric power generation device which can effectively absorb unidirectional vibration energy in a certain frequency range aiming at the unidirectional vibration energy in a vibration instrument or a vibration environment.
The core technical characteristics of the invention are as follows: the periphery of the spiral copper sheet substrate is circular, the spiral copper sheet substrate and the piezoelectric sheet can be effectively embedded into piezoelectric sheet channels on the shell 1 and the shell 2, the spiral copper sheet substrate and the piezoelectric sheet are both spiral, the natural frequency of the power generation device formed by the spiral copper sheet substrate, the piezoelectric sheet and the piezoelectric sheet can be effectively adjusted by adjusting the shape parameters of the spiral copper sheet substrate and the piezoelectric sheet or the weight of the counterweight bolt and nut, the natural frequency of 10 power generation sheets is linearly distributed in a target frequency range, and the efficient unidirectional broadband power generation effect is achieved. Make shell 1 and 2 axial alignments of shell and restraint through the cooperation of shell recess and shell lug, make shell 1 and shell 2 firmly fix on the vibration source through the cooperation between shell external screw thread, outer shell internal thread, outer shell external screw thread, the base internal thread, reach the parallelly connected effect of 10 power generation facility. When the vibration source vibrates, vibration energy is conducted to 10 power generation devices, and the power generation devices are connected in parallel, and the natural frequency is close to the target frequency, so that part of the power generation devices can be easily caused to achieve larger amplitude to realize high-efficiency power generation.
The technical scheme adopted by the invention is a single-phase broadband piezoelectric power generation device. The piezoelectric patch comprises a piezoelectric patch (7), wherein the piezoelectric patch (7) is spiral and is tightly attached to a spiral copper sheet substrate (8), and a counterweight bolt nut (6) is fixed through hole positions corresponding to the centers of the piezoelectric patch (7) and the spiral copper sheet substrate (8) to play a role in adjusting the natural frequency of the whole power generation device. The spiral copper sheet substrate (8) is fixed on the shell 1(1) and the shell 2(17) through piezoelectric sheet channels (14) on the shell 1(1) and the shell 2(17), and the shell 1(1) and the shell 2(17) have 10 piezoelectric sheet channels (14) in total, so that the broadband vibration energy absorption effect can be achieved. The shell 1(1) and the shell 2(17) are respectively provided with a pair of shell grooves (3) and shell lugs (9), and the axial alignment and restraint of the shell 1(1) and the shell 2(17) are achieved through the corresponding shell lugs (9) and shell grooves (3). The buckle (15) and the buckle bolt nut (16) can fix the shell 1(1) and the shell 2(17) through the buckle groove (2) on the shell 1(1) and the shell 2(17), when the shell 1(1) and the shell 2(17) are fixed, the outer shell external threads (13) of the shell 1(1) and the shell 2(17) are aligned, the shell 1(1) and the shell 2(17) are fixed on the outer shell (4) through the outer shell external threads (13) and the outer shell internal threads (12) in a matched mode, the outer shell (4) is fixed on the base (5) through the outer shell external threads (11) and the base internal threads (10), the base (5) is fixed with a vibration source, vibration is transmitted to the power generation device through the base (5), the outer shell (4), the shell 1(1) and the shell 2(17), and unidirectional broadband power generation is achieved.
The piezoelectric sheet (7) and the spiral copper sheet substrate (8) are spiral, the piezoelectric sheet (7) is only arranged on the part of the spiral copper sheet substrate (8) with larger displacement, and the periphery of the spiral copper sheet substrate (8) is a complete circular edge and is used for being embedded into a piezoelectric sheet channel (14) on the shell 1(1) and the shell 2 (17).
The natural frequency of the power generation device jointly formed by the balance weight bolt nut (6), the piezoelectric patches (7) and the spiral copper sheet substrate (8) can be adjusted through the weight of the balance weight bolt nut (6), and meanwhile, the shape parameters of the piezoelectric patches (7) and the spiral copper sheet substrate (8), such as the number of turns, the thread pitch, the width, the thickness and the like, can also greatly influence the natural frequency, so that the purpose can be achieved by modifying the shape parameters of the piezoelectric patches (7) and the spiral copper sheet substrate (8) by adjusting the natural frequency, and the shapes of the piezoelectric patches (7) and the spiral copper sheet substrate (8) in actual use are not limited to those drawn by the patent.
The shapes of the piezoelectric sheet (7) and the spiral copper sheet substrate (8) can only vibrate along a single direction, so that the direction of the whole device needs to be selected during actual use, and the maximum efficiency is achieved.
When the device is used, the approximate vibration frequency range of a vibration source is determined, and then the natural frequency of 10 power generation devices is linearly distributed in the vibration range of the vibration source by adjusting the shape parameters of the piezoelectric sheet (7) and the spiral copper sheet substrate (8) or the weight of the counterweight bolt nut (6), so that the device achieves a broadband vibration energy absorption effect.
The spiral copper sheet substrate (8) is made of copper, and the piezoelectric sheet (7) is made of piezoelectric ceramic.
The shell 1(1) and the shell 2(17) are respectively provided with a pair of shell grooves (3) and shell lugs (9), the axial alignment and restraint of the shell 1(1) and the shell 2(17) are achieved by embedding the corresponding shell lugs (9) and shell grooves (3), and in order to ensure that the embedding is smooth, the groove position of the shell groove (3) is slightly larger than the shell lugs (9).
In order to ensure that the outer shell threads (13) of the outer shell 1(1) and the outer shell 2(17) are aligned when the outer shell 1(1) and the outer shell 2(17) are fixed, the outer shell 1(1) and the outer shell 2(17) are uniformly threaded firstly when being machined, and smooth screwing in the outer shell sleeve (4) is ensured.
This patent base (5) is through special screw hole site and vibration source fixed combination, and not this kind of mode is restricted in the in-service use, if can be through sucking disc formula base and vibration source fixed combination.
Compared with the prior art, the invention has the following beneficial effects.
(1) The invention fully develops 10 power generation devices which are connected in parallel to absorb vibration energy and convert the vibration energy aiming at unidirectional vibration energy in a vibration instrument or a vibration environment, and realizes the efficient utilization of energy.
(2) The invention fully utilizes the shape parameters of the spiral copper sheet substrate and the piezoelectric sheet and the weight of the counterweight bolt nut to adjust the natural frequency of the power generation device consisting of the spiral copper sheet substrate, the piezoelectric sheet and the counterweight bolt nut, so that the natural frequency of the power generation device is linearly distributed in the range of target frequency, and high-efficiency broadband power generation is realized.
(3) According to the invention, the special structures of the shell 1 and the shell 2 are embedded into 10 power generation devices which are connected in parallel to achieve the effect of efficient unidirectional vibration energy collection.
Drawings
FIG. 1 is a half plane view of a unidirectional broadband piezoelectric power generation device according to the present invention;
FIG. 2 is a schematic view of an installation of a unidirectional broadband piezoelectric power generator according to the present invention;
FIG. 3 is an overall view of a unidirectional broadband piezoelectric power generation device according to the present invention;
FIG. 4 is a detailed view of a casing 1 of the unidirectional broadband piezoelectric power generation device of the present invention;
FIG. 5 is a detailed view of the piezoelectric sheet and spiral copper sheet substrate of the unidirectional broadband piezoelectric power generation device of the present invention;
the numbers in fig. 1 to 5 are uniform, (1) is a shell 1, (2) is a buckling groove, (3) is a shell groove, (4) is a shell sleeve, (5) is a base, (6) is a counterweight bolt nut, (7) is a piezoelectric sheet, (8) is a spiral copper sheet substrate, (9) is a shell convex block, (10) is a base internal thread, (11) is a shell sleeve external thread, (12) is a shell sleeve internal thread, (13) is a shell external thread, (14) is a piezoelectric sheet channel, (15) is a buckle, (16) is a buckling bolt nut, and (17) is a shell 2.
Detailed description of the preferred embodiments
In order to fully understand the advantages of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and the specific embodiments, which are only used for explaining the present invention and do not limit the protection scope of the present invention.
Example (b): as shown in fig. 1 to 5, the piezoelectric sheet (7) is bonded to the portion of the spiral copper sheet substrate (8) where the vibration displacement is the largest through a special material, and the counterweight bolt nut (6) is fixed through corresponding hole positions on the piezoelectric sheet (7) and the spiral copper sheet substrate (8), so that the natural frequency of the power generation device formed by the counterweight bolt nut (6), the piezoelectric sheet (7) and the spiral copper sheet substrate (8) can be adjusted. The spiral copper sheet substrate (8) is embedded and fixed through a piezoelectric sheet channel (14) in the shell 1(1) and the shell 2(17), and the shell 1(1) and the shell 2(17) are embedded into each other through shell lugs (9) and shell grooves (3) in corresponding positions to realize axial positioning and constraint of the shell 1(1) and the shell 2 (17). The housings 1(1) and 2(17) are radially constrained by means of a snap (15) and a snap bolt nut (16). The shell 1(1) and the shell 2(17) can be fixed on the outer shell (4) through the matching of the outer shell external thread (13) and the outer shell internal thread (12) when being combined. Outer shell (4) are fixed on base (5) through outer shell external screw thread (11) and base internal thread (10) cooperation, and base (5) are fixed in the vibration source through bolt and nut or screw, realize the transmission to vibration energy and the fixed of whole device.
As shown in fig. 1 and 5, the natural frequency of the power generation device composed of the counterweight bolt nut (6), the piezoelectric sheet (7) and the spiral copper sheet substrate (8) in the present embodiment can be adjusted by the weight of the counterweight bolt nut (6), and the shape parameters of the piezoelectric sheet (7) and the spiral copper sheet substrate (8), such as the number of turns, pitch, width and thickness, also have a great influence on the natural frequency, so that the adjustment of the natural frequency can be achieved by modifying the shape parameters of the piezoelectric sheet (7) and the spiral copper sheet substrate (8), and the shapes of the piezoelectric sheet (7) and the spiral copper sheet substrate (8) are not limited to those depicted in this patent in actual use.
The practical use of the unidirectional broadband piezoelectric power generation device in the embodiment has higher installation requirements, and needs to be installed on the side with the largest displacement of the vibration source so as to achieve the best power generation effect.
When the unidirectional broadband piezoelectric power generation device is used, the approximate vibration frequency range of a vibration source is determined, and then the natural frequency of 10 power generation devices is linearly distributed in the vibration range of the vibration source by adjusting the shape parameters of the piezoelectric sheet (7) and the spiral copper sheet substrate (8) or the weight of the counterweight bolt nut (6), so that the device achieves a broadband vibration energy absorption effect.
As shown in fig. 4, the number of the piezoelectric sheet channels (14) on the housing (1) is 10 in total in the present example, and the number is not limited to 10 in practical use, and can be increased or decreased according to practical situations.
The material of the spiral copper sheet substrate (8) is copper, and the material of the piezoelectric sheet (7) is piezoelectric ceramic.
As shown in fig. 4, the housing 1(1) and the housing 2(17) in this embodiment are respectively provided with a pair of housing grooves (3) and housing protrusions (9), and the housing grooves (3) and the housing protrusions (9) are inserted into the corresponding housing grooves (3) to achieve the axial alignment and constraint effects of the housing 1(1) and the housing 2(17), and in order to ensure that the insertion is smooth, the groove position of the housing groove (3) should be slightly larger than the housing protrusion (9).
The outer threads (13) of the outer shell 1(1) and the outer shell 2(17) are aligned when the outer shell 1(1) and the outer shell 2(17) are fixed, and the outer shell 1(1) and the outer shell 2(17) are uniformly threaded firstly when being machined, so that the outer shell can be smoothly screwed into the outer shell (4).
The base (5) is fixedly combined with the vibration source through special screw hole positions, and the mode is not limited in practical use, for example, the base can be fixedly combined with the vibration source through a sucker type base or a paste type base.
As shown in fig. 4 and 5, the piezoelectric sheet (7) and the spiral copper sheet substrate (8) described in this example are spiral, and the periphery of the spiral copper sheet substrate (8) is a complete circular edge, which is used for being embedded into the piezoelectric sheet channel (14) on the housing 1(1) and the housing 2(17), so that the spiral copper sheet substrate (8) can be firmly fixed after the housing 1(1) and the housing 2(17) are fastened, and in order to ensure that the fastening is smooth, the maximum diameter of the spiral copper sheet substrate (8) is slightly smaller than the maximum inner diameter of the piezoelectric sheet channel (14).
In the embodiment, the approximate frequency range of the vibration source needs to be measured in advance when the vibration source is used under actual working conditions, through reasonable design of the shape parameters of the spiral copper sheet substrate (8), the piezoelectric sheet (7) and the weight parameters of the counterweight bolt nut (6), the natural frequencies of 10 power generation devices consisting of the spiral copper sheet substrate (8), the piezoelectric sheet (7) and the counterweight bolt nut (6) are uniformly distributed in target frequencies, when the vibration source generates vibration, the vibration is transmitted to the 10 power generation devices through the base (5), the shell sleeve (4), the shell (1), (1) and the shell (2), (17), the purpose of self power generation is achieved through parallel connection of the 10 power generation devices, and due to the fact that the natural frequencies are close to the target frequencies, part of the power generation devices can achieve maximum vibration displacement when the target frequencies slightly change.
To sum up, compared with the traditional piezoelectric power generation device, the unidirectional broadband piezoelectric power generation device realizes efficient broadband power generation of unidirectional vibration energy, and meanwhile, the spiral power generation device is innovatively provided, so that vibration of the spiral power generation piece replaces vibration of the cantilever beam type power generation piece in a unidirectional small space range, and efficient utilization of space is realized.
Although the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made without departing from the spirit of the present invention, which falls within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110549278.4A CN113193785B (en) | 2021-05-20 | 2021-05-20 | A one-way broadband piezoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110549278.4A CN113193785B (en) | 2021-05-20 | 2021-05-20 | A one-way broadband piezoelectric generator |
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| Publication Number | Publication Date |
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| CN113193785A true CN113193785A (en) | 2021-07-30 |
| CN113193785B CN113193785B (en) | 2022-05-31 |
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| CN202110549278.4A Expired - Fee Related CN113193785B (en) | 2021-05-20 | 2021-05-20 | A one-way broadband piezoelectric generator |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003244974A (en) * | 2002-02-18 | 2003-08-29 | Nikon Corp | Oscillatory wave motor |
| CN105391345A (en) * | 2015-12-30 | 2016-03-09 | 南京理工大学 | Fluid power sound source excitation method of piezoelectric generator |
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2021
- 2021-05-20 CN CN202110549278.4A patent/CN113193785B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003244974A (en) * | 2002-02-18 | 2003-08-29 | Nikon Corp | Oscillatory wave motor |
| CN105391345A (en) * | 2015-12-30 | 2016-03-09 | 南京理工大学 | Fluid power sound source excitation method of piezoelectric generator |
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| CN113193785B (en) | 2022-05-31 |
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