CN113241968A - Vibration energy collecting device - Google Patents
Vibration energy collecting device Download PDFInfo
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- CN113241968A CN113241968A CN202110544152.8A CN202110544152A CN113241968A CN 113241968 A CN113241968 A CN 113241968A CN 202110544152 A CN202110544152 A CN 202110544152A CN 113241968 A CN113241968 A CN 113241968A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 240000007643 Phytolacca americana Species 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000003306 harvesting Methods 0.000 claims description 15
- 238000010248 power generation Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 2
- 229910003460 diamond Inorganic materials 0.000 claims 1
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- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
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- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 2
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- 230000004907 flux Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
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Classifications
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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
- H02N2/188—Vibration harvesters adapted for resonant operation
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a vibration energy collecting device, which comprises a base arranged in a vibration environment, a motion conversion assembly and an energy conversion assembly, wherein the motion conversion assembly and the energy conversion assembly are arranged on the base; the motion conversion assembly comprises a rotating shaft and a cam, wherein the rotating shaft is arranged on the base and arranged at a certain inclination angle with the vibration direction of the base, and the cam is fixedly arranged on the rotating shaft; the energy conversion assembly comprises a plurality of piezoelectric plates connected with the rotating shaft and a poking fluted disc fixedly arranged on the base; the poking fluted disc can poke the piezoelectric plate when the rotating shaft rotates, so that the piezoelectric plate is bent to generate voltage. The device has various installation modes and wide vibration energy sources, and can collect vibration energy in various occasions; the rotation of the rotating shaft is converted into the bending of the piezoelectric plate which is stirred, the original vibration frequency is increased, and the energy conversion efficiency is improved.
Description
Technical Field
The invention belongs to the field of vibration energy collection, and particularly relates to a vibration energy collection device.
Background
Modern society is developing rapidly, and micro-electro-mechanical systems (MEMS) are continuously updated, and radio equipment is rapidly developing towards miniaturization, intellectualization, multi-purpose and low power consumption. Radio devices are widely used in biomedical applications, navigation systems, environmental monitoring, highway networks, and the like. At present, these micro-electromechanical devices usually use conventional batteries such as nickel-hydrogen batteries, polymer batteries, etc. to provide energy for them. Vibration is a common form of energy, and is ubiquitous in life and in the natural environment. Such as vibration caused by wind, vibration of household appliances, vibration of vehicle engines, vibration of machinery in factories, vibration caused by human body activities, etc., which has the advantages of simple structural form, higher energy density and wide sources. Therefore, it is important to convert the vibration energy which is generally existed in the natural environment and human life into the form of electric energy to replace part of the traditional battery power supply. The vibration energy collecting technology does not need fuel, has no pollution to the environment, can reduce certain noise pollution in life, and has the capability of continuous energy supply, so the collection of the vibration energy has very important application prospect.
The magnetostrictive material is a novel functional material, and has the main advantage of realizing the interconversion between mechanical energy and electric (magnetic) energy. The magnetostrictive vibration energy collecting device is based on the Villari effect of magnetostrictive materials, namely the phenomenon that when the Galfenol material is subjected to stress and generates bending deformation, the magnetic flux density in the material is changed due to periodic bending deformation. When the magnetostrictive material is acted by an external force, the magnetization state is changed, and based on the Faraday's law of electromagnetic induction, the changed magnetic field generates an induced current in the coil, so that mechanical energy is converted into magnetic energy firstly, then the magnetic energy is converted into electric energy, and the power generation process of collecting the vibration energy can be realized by matching with an energy management circuit. The magnetostrictive material has high sensitivity, quick response, excellent mechanical and magnetic coupling characteristics and large mechanical and magnetic coupling coefficient; the energy density is much higher than that of the traditional alloy material and piezoelectric ceramics; has high compressive strength. Therefore, the giant magnetostrictive material has wide development prospect in the fields of vibration energy collection and power generation and the like.
The PVDF piezoelectric film can convert any vibration energy into electric energy, the obtained energy density is high, and the mechanism of the piezoelectric vibration energy collecting device is to convert mechanical vibration energy into electric energy based on the positive piezoelectric effect of a piezoelectric material. When receiving certain fixed direction exogenic action, piezoelectric material can produce deformation, and the inside electric polarization phenomenon that produces simultaneously two charges that produce the equivalent abnormal sign on the surface, when the external force withdraws the back, resumes uncharged state again, converts mechanical vibration energy into the electric energy from this.
The existing vibration energy collecting device has more limitations on use occasions, is not flexible enough, and has low energy collecting efficiency.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a vibration energy harvesting device that satisfies one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vibration energy collecting device comprises a base installed in a vibration environment, a motion conversion assembly and an energy conversion assembly, wherein the motion conversion assembly and the energy conversion assembly are installed on the base;
the motion conversion assembly comprises a rotating shaft and a cam, wherein the rotating shaft is arranged on the base and arranged at a certain inclination angle with the vibration direction of the base, and the cam is fixedly arranged on the rotating shaft;
the energy conversion assembly comprises a plurality of piezoelectric plates connected with the rotating shaft and a poking fluted disc fixedly arranged on the base; the poking fluted disc can poke the piezoelectric plate when the rotating shaft rotates, so that the piezoelectric plate is bent to generate voltage.
Preferably, the piezoelectric plate comprises an elastic bottom plate connected with the rotating shaft and piezoelectric films attached to two sides of the elastic bottom plate, and the piezoelectric films are driven to bend when the piezoelectric plate bends.
As a preferred scheme, the energy conversion assembly comprises a plurality of magnetostrictive power generation plates vertically connected with the rotating shaft and a poking fluted disc fixed on the base; the poking fluted disc can poke the magnetostrictive power generation plate when the rotating shaft rotates, so that the magnetostrictive power generation plate is bent to generate current.
As a further preferred aspect, the magnetostrictive power generation plate includes an elastic base plate connected to the rotating shaft, magnetostrictive plates attached to both sides of the elastic base plate, and coils arranged around the magnetostrictive plates and capable of generating induced current when the magnetostrictive plates are bent.
As a preferred scheme, the poking fluted disc comprises an annular frame fixedly connected with the base and poking teeth uniformly distributed along the annular frame; the poking teeth are used for intermittently contacting the piezoelectric plate and poking the piezoelectric plate.
As a further preferred scheme, the toggle teeth are quadrangular prisms with rhombic bottom surfaces, and one side edge faces the rotating shaft; 30 stirring teeth are evenly distributed on the annular frame.
Preferably, the piezoelectric plate is fixedly connected with the rotating shaft through a clamping frame arranged on the rotating shaft.
As the preferred scheme, the rotating shaft is connected with the base through a bearing, so that the friction force generated when the rotating shaft rotates is reduced.
As the preferred scheme, the cam is in a handle shape with one thin end and one thick end, and the thin end is connected with the rotating shaft, so that the rotating shaft can rotate more easily when the base vibrates along with the vibration environment.
As the preferred scheme, stir fluted disc and pivot connection, a plurality of piezoelectric plate fixed mounting is on the base.
Compared with the prior art, the invention has the beneficial effects that:
the device has various installation modes and wide vibration energy sources, and can collect vibration energy in various occasions; the rotation of the rotating shaft is converted into the bending of the piezoelectric plate which is stirred, the original vibration frequency is increased, and the energy conversion efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a vibration energy harvesting device of embodiment 1 of the present invention;
FIG. 2 is a schematic view of a combination of a rotary shaft, a cam, a holder and a ring frame according to embodiment 1 of the present invention;
FIG. 3 is a schematic view showing a combination of a rotary shaft and a cam in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a piezoelectric plate of embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of a toggle fluted disc of embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a magnetostrictive power generation plate according to embodiment 2 of the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1: a vibration energy harvesting device of the present embodiment, the structure of which is shown in fig. 1 and 2, includes:
the device comprises a base 1, and a motion conversion assembly and an energy conversion assembly which are arranged in the base, wherein the base 1 is used for being horizontally or vertically arranged on vibrating equipment; the motion conversion assembly is constructed as shown in fig. 3, and includes a rotary shaft 2-2 and a cam 2-1 mounted on the top end of the rotary shaft 2-2. The base 1 is in the shape of a box with four sides of different heights, the top of the box is a slope, and four sides of the top gradually decrease from one vertex to the other opposite vertex.
The rotating shaft 2-2 is obliquely arranged in the base 1 at the same inclination angle as the inclined plane of the base 1, and the bottom of the rotating shaft 2-2 is not contacted with the inner bottom of the base 1; the rotating shaft 2-2 is rotatably connected with the fixing frame 3 through the deep groove ball bearing 6, four feet of the fixing frame 3 are respectively arranged on four edges of the top of the base 1 in a lapping mode, so that the inclination angle of the rotating shaft 2-2 and the base is fixed, and the deep groove ball bearing 6 is used for reducing the friction force when the rotating shaft 2-2 rotates.
The top end of the rotating shaft 2-2 is provided with a cam 2-1, the cam 2-1 is in a handle shape with a thin end and a thick end, the thin end is fixedly connected with the rotating shaft 2-2, and the cam is screwed on the top end of the rotating shaft 2-2 through a bolt.
Above-mentioned motion conversion subassembly's structure makes base 1 when vibrating along with equipment, and the cam can produce the rotation trend because the pivot that the slope was arranged has the contained angle with the vibration direction of outside vibration environment when the vibration, drives the pivot and rotates or produce the angular deflection, and the thick shape in the inboard thin outside of cam makes its mass distribution inhomogeneous, and the barycenter position is close to the cam outside to make the pivot change the rotation.
The energy conversion assembly comprises four piezoelectric plates 8 uniformly arranged on the rotating shaft 2-2 in a surrounding way and a toggle fluted disc 4 fixedly connected with the fixed frame 3; the structure of the piezoelectric plate 8 is shown in fig. 4, and comprises an elastic bottom plate 8-1 which is in a long sheet shape and made of beryllium bronze, and two piezoelectric films 8-4 which are attached to two sides of the elastic bottom plate 8-1 and are close to one end; one end of the elastic bottom plate 8-1, which is far away from the piezoelectric film 8-4, is fixedly connected with the rotating shaft 2-2. The structure of the poking fluted disc 4 is shown in figure 5 and comprises an annular frame 4-1 with an annular structure and poking teeth 4-2 which are uniformly arranged on the annular frame 4-1. The inner side of the annular frame 4-1 is provided with two legs, which are provided with through holes for penetrating screws to the fixed frame 3, so that the poking fluted disc is fixedly arranged on the fixed frame 3 around the rotating shaft. The number of the poking teeth 4-2 is 30 in total, the poking teeth are uniformly distributed at certain intervals and are of a quadrangular structure, the bottom surfaces of the quadrangular structure are rhombic, and one side edge of each poking tooth 4-2 faces the direction of the rotating shaft. In the energy conversion component with the structure, one end of the elastic bottom plate 8-1, which is pasted with the piezoelectric film 8-4, in the piezoelectric plate 8 faces the toggle teeth 4-2 surrounding the rotating shaft, and the tail end of the elastic bottom plate 8-1 slightly exceeds the distance between the toggle teeth and the rotating shaft, so that the tail end of the elastic bottom plate 8-1 sweeps on the side surface of the toggle teeth when the rotating shaft rotates. The attached piezoelectric film 8-4 is driven to bend and deform along with gradual bending deformation in the sweeping process, so that potential difference appears at two ends of the material due to the positive piezoelectric effect, and the generated electric energy is led out through a lead by utilizing the conductivity of the beryllium bronze elastic bottom plate 8-1 attached with the material. When the tail end of the elastic bottom plate 8-1 passes over the side edge of the poking tooth 4-2 facing the rotating shaft, the elastic bottom plate 8-1 restores the shape again. The density and the symmetrical shape of the poking teeth 4-2 ensure that the piezoelectric plate 8 can generate electric energy when the rotating shaft 2-2 rotates randomly. It should be noted that: the number of the piezoelectric plates 8 can be arbitrarily selected, and four are exemplified in the present embodiment.
In the process of converting the vibration mechanical energy into the electric energy, the rotation vibration or the angle deviation of the cam is increased relative to the original vibration source frequency, and then the piezoelectric plate and the shifting teeth intermittently collide to further increase the frequency, so that the process of generating vibration from the vibration source to the piezoelectric plate is equivalent to twice frequency increase of the original frequency, and the vibration is closer to the resonance frequency of the piezoelectric film, thereby improving the energy conversion efficiency.
Example 2: a vibration energy harvesting device of the present embodiment is different from embodiment 1 in that:
the piezoelectric plate is replaced with a magnetostrictive power generation plate, and the structure of the piezoelectric plate is as shown in fig. 6, and includes an elastic base plate 8-1, magnetostrictive sheets 8-2 attached to both sides of one end of the elastic base plate 8-1, respectively, a coil 8-3 wound around the magnetostrictive sheets, and a permanent magnet 8-5 mounted on one side of the elastic base plate 8-1, the permanent magnet being configured to provide a bias magnetic field for magnetic domain deflection of the magnetostrictive sheets. Similarly to the embodiment 1, when the elastic base plate 8-1 is swept on the side of the toggle tooth, the magnetostrictive sheet 8-2 is bent and deformed, and the magnetic flux inside the magnetostrictive sheet 8-2 is changed by using the vilarei effect, so that an induced current is generated in the coil 8-3 surrounding the magnetostrictive sheet 8-2 by electromagnetic induction.
Other structures can refer to embodiment 1.
Example 3: a vibration energy harvesting device of the present embodiment is different from embodiment 1 in that:
as shown in fig. 2, a clamping frame 7 is circumferentially disposed on the rotating shaft for clamping and fixing the piezoelectric plate.
This structure is convenient for change the piezoelectric plate.
Other structures can refer to embodiment 1.
Example 4: a vibration energy harvesting device of the present embodiment is different from embodiment 1 in that:
the relative rotation relationship between the piezoelectric plate and the poking fluted disc is interchanged, and the poking fluted disc is not fixedly connected with the fixed frame 3, but is fixedly connected with the rotating shaft and rotates along with the rotation of the rotating shaft. The piezoelectric plate is not fixedly connected with the rotating shaft, but is fixedly arranged on the base and is arranged around the rotating shaft.
The piezoelectric plate with the structure does not need to rotate, and the installation and the connection of the electrical equipment connected with the piezoelectric plate are convenient.
Other structures can refer to embodiment 1.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. A vibration energy collecting device is characterized by comprising a base arranged in a vibration environment, a motion conversion assembly and an energy conversion assembly, wherein the motion conversion assembly and the energy conversion assembly are arranged on the base;
the motion conversion assembly comprises a rotating shaft and a cam, wherein the rotating shaft is arranged on the base and arranged at a certain inclination angle with the vibration direction of the base, the cam is fixedly arranged on the rotating shaft, and the inclination angle between the rotating shaft and the vibration direction of the base enables the rotating shaft to be driven by the cam to rotate at a certain angle when the base vibrates along with the vibration environment;
the energy conversion assembly comprises a plurality of piezoelectric plates connected with the rotating shaft and a poking fluted disc fixedly installed on the base; when the rotating shaft rotates, the poking fluted disc can poke the piezoelectric plate, so that the piezoelectric plate is bent to generate voltage.
2. A vibration energy harvesting apparatus according to claim 1, wherein the piezoelectric plate comprises a flexible base plate connected to the shaft and piezoelectric membranes attached to opposite sides of the flexible base plate, the bending causing the piezoelectric membranes to bend.
3. A vibrational energy harvesting apparatus according to claim 1, wherein said energy conversion assembly includes a plurality of magnetostrictive power generation plates perpendicularly attached to said shaft, and a toggle gear plate secured to said base; the poking fluted disc can poke the magnetostrictive power generation plate when the rotating shaft rotates, so that the magnetostrictive power generation plate is bent to generate current.
4. A vibrational energy harvesting apparatus according to claim 3, wherein said magnetostrictive power generation plate comprises an elastic base plate connected to the shaft, magnetostrictive plates disposed on opposite sides of the elastic base plate, and coils disposed around said magnetostrictive plates for inducing current when said magnetostrictive plates are bent.
5. A vibration energy harvesting apparatus according to claim 1 wherein said toggle gear comprises an annular frame fixedly attached to said base and toggle teeth spaced evenly along said annular frame; the poking teeth are used for intermittently contacting the piezoelectric plate to poke the piezoelectric plate.
6. A vibration energy harvesting apparatus according to claim 5 wherein the pick-up teeth are square prisms having diamond shaped bases with one side edge facing the axis of rotation; and 30 stirring teeth are uniformly distributed on the annular frame.
7. A vibrational energy harvesting apparatus according to claim 1, wherein said piezoelectric plate is fixedly attached to said rotatable shaft by means of a holder provided on said rotatable shaft.
8. A vibrational energy harvesting apparatus according to claim 1, wherein said shaft is coupled to said base by bearings to reduce friction during rotation of said shaft.
9. A vibration energy harvesting apparatus according to claim 1, wherein the cam is in the form of a shank having a narrow end and a wide end, the narrow end being connected to the shaft to facilitate rotation of the shaft when the base vibrates in response to a vibration environment.
10. A vibration energy harvesting apparatus according to claim 1, wherein the toggle gear is coupled to the shaft and the piezoelectric plates are fixedly mounted to the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544152.8A CN113241968A (en) | 2021-05-19 | 2021-05-19 | Vibration energy collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110544152.8A CN113241968A (en) | 2021-05-19 | 2021-05-19 | Vibration energy collecting device |
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| Publication Number | Publication Date |
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| CN113241968A true CN113241968A (en) | 2021-08-10 |
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| CN202110544152.8A Pending CN113241968A (en) | 2021-05-19 | 2021-05-19 | Vibration energy collecting device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020121844A1 (en) * | 2000-10-20 | 2002-09-05 | Kamyar Ghandi | Piezoelectric generator |
| KR20130056157A (en) * | 2011-11-21 | 2013-05-29 | 조금용 | Electricity generating apparatus using piezoelecteic device, system for producing electricity by synthesis of hydrogen/oxygen and hot water supply device having the same |
| US20170009734A1 (en) * | 2015-06-28 | 2017-01-12 | Vassilios Vamvas | Eccentrically Rotating Mass Turbine |
| CN107555278A (en) * | 2017-08-17 | 2018-01-09 | 浙江师范大学 | A kind of dial type piezoelectricity elevator alarm |
-
2021
- 2021-05-19 CN CN202110544152.8A patent/CN113241968A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020121844A1 (en) * | 2000-10-20 | 2002-09-05 | Kamyar Ghandi | Piezoelectric generator |
| KR20130056157A (en) * | 2011-11-21 | 2013-05-29 | 조금용 | Electricity generating apparatus using piezoelecteic device, system for producing electricity by synthesis of hydrogen/oxygen and hot water supply device having the same |
| US20170009734A1 (en) * | 2015-06-28 | 2017-01-12 | Vassilios Vamvas | Eccentrically Rotating Mass Turbine |
| CN107555278A (en) * | 2017-08-17 | 2018-01-09 | 浙江师范大学 | A kind of dial type piezoelectricity elevator alarm |
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Application publication date: 20210810 |
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