CN209787070U - piezoelectric vibration energy acquisition and conversion device - Google Patents
piezoelectric vibration energy acquisition and conversion device Download PDFInfo
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- CN209787070U CN209787070U CN201920963599.7U CN201920963599U CN209787070U CN 209787070 U CN209787070 U CN 209787070U CN 201920963599 U CN201920963599 U CN 201920963599U CN 209787070 U CN209787070 U CN 209787070U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 34
- 229910001369 Brass Inorganic materials 0.000 claims description 31
- 239000010951 brass Substances 0.000 claims description 31
- 239000000919 ceramic Substances 0.000 claims description 22
- 238000003306 harvesting Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The utility model relates to a piezoelectric type vibration energy acquisition and conversion device for in the rail transit train operational environment, the mechanical energy that the vibration produced when gathering the train operation changes into the electric energy, the device include, be used for fixing on the train and upper end open-ended base, form the shell of inner space with the base lock, set up spacing storehouse on the base bottom surface and set up in the inner space and the piezoelectric vibrator of vertical motion under the restraint of spacing storehouse. Compared with the prior art, the utility model has the advantages of effective deformation volume is big, generating efficiency is high, the good reliability, non-maintaining, security are high, long service life, convenient to detach and installation.
Description
Technical Field
The utility model relates to a vibration energy is collected to the train, especially relates to a piezoelectric type vibration energy gathers conversion equipment.
Background
Safety problems in the running process of trains are always the key points of attention of people, and with the rapid development of wireless transmission and monitoring technologies, low-power-consumption wireless sensors play an important role in the field of train monitoring. In the practical application process, the problems of difficult power supply and the like limit the large-scale popularization and use of the wireless sensor. The mechanical vibration energy is energy generally existing in the running environment of the rail train, and the energy generated by vibration during running of the train is converted into electric energy through the energy acquisition device to supply energy to the monitoring equipment, so that the method has economic benefits and solves practical problems.
however, most of the existing piezoelectric vibration energy collecting devices have defects in structure, and have the problems of short service life of piezoelectric materials, insufficient power generation efficiency, poor reliability and the like so as to be solved. Therefore, to the above circumstances, the utility model discloses under the prerequisite that improves the device reliability, provide one kind through optimizing structure and parameter and obtain the higher energy harvesting power, the higher vibration energy collection system of security.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a piezoelectric vibration energy collecting and converting device for overcoming the above-mentioned drawbacks of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
The utility model provides a piezoelectric type vibration energy acquisition and conversion device for in the rail transit train operational environment, gather the mechanical energy that the train operation vibration produced and change into the electric energy, the device include, be used for fixing on the train and upper end open-ended base, with the shell that the base lock formed inner space, set up spacing storehouse on the base bottom surface and set up in inner space and the piezoelectric vibrator of vertical motion under the restraint of spacing storehouse.
The piezoelectric vibrator comprises a check bolt, a limiting block fixed at the bottom end of the check bolt and constrained by a limiting bin, an upper self-locking nut, a mass block, a lower self-locking nut, a brass substrate and piezoelectric ceramic pieces coaxially attached to the upper side and the lower side of the brass substrate, wherein the centers of the lower self-locking nut, the mass block, the lower piezoelectric ceramic piece, the brass substrate and the upper piezoelectric ceramic piece are sequentially penetrated through the check bolt from bottom to top between the limiting block and the self-locking nut, and the two sides of the brass substrate are fixed on the buckling surface of the base and the shell through bolts.
The mass block is a brass mass block with adjustable mass, and the natural frequency of the piezoelectric vibrator is changed by changing the mass.
The piezoelectric vibrator also comprises a gasket arranged at the central through hole of the brass substrate and the mass block, and the outer diameter of the gasket is smaller than the hole diameter of the central through hole of the lower piezoelectric ceramic piece, so that the force applied to the mass block acts on the brass substrate only through the anti-loosening bolt and the gasket, and the stress dispersion of the piezoelectric ceramic piece is ensured.
The calculation formula of the generated power P of the device is as follows:
K is a power generation coefficient of the piezoelectric material, a is acceleration, m is total mass of the piezoelectric vibrator, l is the length of the center of the substrate from the bolt hole, b is the width of the substrate, h is the thickness of the substrate, and the parameter values of the maximum power generation power are obtained by comprehensively considering the volume factor.
The connecting part of the check bolt and the hole is pre-coated with adhesive.
The limiting bin is cylindrical with an opening at the lower end and is reversely buckled on the bottom surface of the base, the side wall of the limiting bin is provided with a limiting block inlet, and the top surface of the limiting bin is provided with an L-shaped guide groove matched with the limiting block inlet, so that the limiting block is arranged in the limiting bin, the displacement of the limiting block is limited on an X-Y plane, and the amplitude is limited in the Z direction.
The base and the shell are provided with lead-out holes for leading out the piezoelectric vibrator wires.
Compared with the prior art, the utility model has the advantages of it is following:
One, the utility model discloses a through at piezoceramics center trompil, with external force direct transmission to brass basement, do not act on piezoceramics to guarantee the surface stress dispersion, increase life.
Two, the utility model discloses a guide tracked stop device has been set up, including stopper and the spacing storehouse that is equipped with the guide way. The limiting device is connected through the bolt, is simple in structure, convenient to detach and install, free of maintenance and high in safety, and can bear large impact in the working environment of the train.
Thirdly, the utility model discloses a piezoelectric vibrator form by the equipment of parts such as quality piece, brass basement, piezoceramics, the parameter of every part all can change, can be according to the different adjustment of environment and be suitable for the frequency.
Drawings
Fig. 1 is a top view of the structure of the present invention.
Fig. 2 is a structural section view of the present invention.
Fig. 3 is an exploded view of the piezoelectric vibrator.
fig. 4 is a schematic structural view of the base and the limiting bin.
Fig. 5 is a schematic structural view of the piezoelectric vibrator.
The notation in the figure is:
wherein: 1. the device comprises a shell, 2, a base, 3, a piezoelectric vibrator, 31, a brass substrate, 32, a piezoelectric ceramic piece, 33, a mass block, 34, a gasket, 35, a check bolt, 36, a limiting block, 37, an upper self-locking nut, 38, a substrate gasket, 11, a lead-out hole, 4 and a limiting bin.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
As shown in FIG. 1, the utility model provides a vibration energy collecting device is applicable to the rail transit train environment. The device comprises a shell 1, a base 2, a limiting bin 4 and a piezoelectric vibrator 3. The piezoelectric vibrator 3 comprises a brass substrate 31, piezoelectric ceramic plates 32 coaxially attached to two sides of the substrate, a mass block 33, a gasket 34 arranged between the mass block 33 and the brass substrate 31, a check bolt 35 sequentially connected with the brass substrate, the gasket and the mass block, an upper self-locking nut 37, a lower self-locking nut and a limiting block 36 fixed at the bottom end of the check bolt.
The mass of the mass 33 is formulated according to the actual ambient frequencyAnd calculating to obtain k as the elastic coefficient of the spring and m as the mass of the mass block. The natural frequency of the system can be changed by using different mass blocks, so that the natural frequency can resonate when the system works, and the deformation quantity of the piezoelectric ceramic plate 32 is increased. The piezoelectric ceramic piece 32 is attached to the upper surface and the lower surface of the brass substrate 31 to drive the brass substrate to deform, and the gasket 34 is arranged to prevent the mass block 33 from directly contacting with the piezoelectric ceramic piece 32 to damage the tabletting ceramic.
In this example, the mass 33 is made of high-density brass, and is connected with the washer 34 and the brass substrate 31 through the check bolt 35, and the mass with different mass can be replaced to change the natural frequency of the device, so as to ensure that the device is in a resonance state during operation, the outer diameter of the washer 34 is 4mm, which is smaller than the diameter of the central opening of the piezoelectric ceramic plate 32 by 5mm, so that the force applied to the mass acts on the brass substrate 31 through the check bolt 35 and the washer 34 only, so as to ensure that the stress of the piezoelectric ceramic plate 32 is dispersed, and the service life is prolonged.
The brass substrate 31 is specifically mounted in the following manner: the M3 bolt was used to fasten through the housing 1, base washer 38, brass base 31, base 2.
The calculation formula of the generated power P of the device is as follows:
K is a power generation coefficient of the piezoelectric material, a is acceleration, m is total mass of the piezoelectric vibrator, l is the length of the center of the substrate from the bolt hole, b is the width of the substrate, h is the thickness of the substrate, and the parameter values of the maximum power generation power are obtained by comprehensively considering the volume factor.
The specific installation mode of the device is as follows: the base 2 is fixed in the mounting position using M3 bolts, avoiding relative displacement with the mounting body.
The specific connection mode of the piezoelectric vibrator is as follows: the thread screwing surface of the check bolt 35 is pre-coated with adhesive, and then the check bolt 35 is used for being sequentially connected with the lower self-locking nut, the mass block 33, the washer 34, the brass substrate 31 and the upper self-locking nut 37. The bottom of the anti-loosening bolt 35 is connected with a limiting block 36 which extends into the limiting bin 4.
The limiting bin 4 is fixed at the center of the base through a screw, and the anti-loose bolt 35 and the limiting block 36 can limit displacement on an X-Y plane after entering the limiting bin through the guide groove; the limiting block can limit the amplitude of the piezoelectric vibrator in the Z direction, and the piezoelectric ceramic piece is prevented from losing efficacy due to overlarge vibration.
The case body of the shell 1 and the base 2 is provided with two leading-out ports, so that the lead can be conveniently led out.
The various components of the device were machined according to the structures shown in fig. 1-5. The piezoelectric ceramics 32 are coaxially attached to the upper surface and the lower surface of the rectangular brass substrate 31, a check bolt is used for pre-coating an adhesive, and then the rectangular brass substrate 31, the gasket 34, the mass block 33 and the limiting block 36 are fixed by matching with two self-locking nuts 37, extend into the limiting bin 4 through the channel, and lead wires are led out from the lead-out hole 11. The base is secured to the base 2 by means of M3 bolts and the housing is assembled. And finally, fixing the base 2 at the installation position through bolts.
the specific use method of the device is as follows:
Firstly, measuring the approximate range of the vibration frequency of the working environment by a detection device, and calculating the approximate range by a formulaCalculating the mass of the corresponding mass block;
The device is then assembled and the base is fixed in place and connected to the wire. When vibration is input, the mass block drives the brass substrate, the substrate drives the piezoelectric ceramic piece to vibrate in the Z-axis direction, the piezoelectric ceramic piece collects mechanical energy generated by vibration and converts the mechanical energy into electric energy to be output through the conducting wire, and when the system amplitude is stable, the system stably operates.
It is finally necessary to point out here: the above are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a piezoelectric type vibration energy gathers conversion equipment for in the rail transit train operational environment, gather the mechanical energy that the train vibration produced when moving and change into the electric energy, its characterized in that, the device include, be used for fixing on the train and upper end open-ended base (2), with base (2) lock form inner space's shell (1), set up spacing storehouse (4) on base (2) bottom surface and set up in inner space and piezoelectric vibrator (3) of vertical motion under the restraint of spacing storehouse (4).
2. The piezoelectric vibration energy harvesting and converting device of claim 1 wherein, the piezoelectric vibrator (3) comprises a check bolt (35), a limit block (36) fixed at the bottom end of the check bolt (35) and limited by a limit bin, an upper self-locking nut (37) arranged at the top end of the bottom end of the check bolt (35), a mass block (33), a lower self-locking nut, a brass substrate (31) and piezoelectric ceramic plates (32) coaxially attached to the upper side and the lower side of the brass substrate (31), the centers of the lower self-locking nut, the mass block (33), the lower piezoelectric ceramic piece, the brass substrate (31) and the upper piezoelectric ceramic piece are sequentially penetrated through by the anti-loosening bolt (35) from bottom to top between the limit block (36) and the self-locking nut (37), two sides of the brass substrate (31) are fixed on the buckling surfaces of the base (2) and the shell (1) through bolts.
3. The piezoelectric vibration energy harvesting and converting device according to claim 2, wherein the mass (33) is a brass mass with adjustable mass, and the natural frequency of the piezoelectric vibrator (3) is changed by changing the mass.
4. The piezoelectric vibration energy harvesting and converting device according to claim 2, wherein the piezoelectric vibrator (3) further comprises a washer (34) disposed at the central through hole of the brass substrate (31) and the mass block (33), the outer diameter of the washer (34) is smaller than the diameter of the central through hole of the lower piezoelectric ceramic plate, so that the force applied to the mass block (33) acts on the brass substrate (31) only through the check bolt (35) and the washer (34) to ensure the stress dispersion of the piezoelectric ceramic plate.
5. the piezoelectric vibration energy harvesting and converting device according to claim 2 wherein the lockbolt (35) is pre-coated with adhesive at the connection to the hole.
6. The piezoelectric vibration energy collecting and converting device according to claim 2, wherein the limiting chamber (4) is cylindrical with an open lower end and is inverted on the bottom surface of the base (2), the sidewall of the limiting chamber is provided with a limiting block inlet, the top surface of the limiting chamber is provided with an L-shaped guide slot matched with the limiting block inlet, so that the limiting block (36) is installed in the limiting chamber (4) and limits the displacement thereof in the X-Y plane and limits the amplitude in the Z direction.
7. The piezoelectric vibration energy harvesting and converting device according to claim 1, wherein the base (2) and the housing (1) are provided with lead-out holes (11) for leading out the piezoelectric vibrator wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963599.7U CN209787070U (en) | 2019-06-25 | 2019-06-25 | piezoelectric vibration energy acquisition and conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963599.7U CN209787070U (en) | 2019-06-25 | 2019-06-25 | piezoelectric vibration energy acquisition and conversion device |
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| CN209787070U true CN209787070U (en) | 2019-12-13 |
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| CN201920963599.7U Expired - Fee Related CN209787070U (en) | 2019-06-25 | 2019-06-25 | piezoelectric vibration energy acquisition and conversion device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176875A (en) * | 2019-06-25 | 2019-08-27 | 上海工程技术大学 | A kind of piezoelectric type vibration energy acquisition conversion equipment |
| CN113189679A (en) * | 2021-04-20 | 2021-07-30 | 上海宏英智能科技股份有限公司 | Piezoelectric rainfall measuring meter |
| CN110176875B (en) * | 2019-06-25 | 2024-06-28 | 上海工程技术大学 | Piezoelectric type vibration energy collecting and converting device |
-
2019
- 2019-06-25 CN CN201920963599.7U patent/CN209787070U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176875A (en) * | 2019-06-25 | 2019-08-27 | 上海工程技术大学 | A kind of piezoelectric type vibration energy acquisition conversion equipment |
| CN110176875B (en) * | 2019-06-25 | 2024-06-28 | 上海工程技术大学 | Piezoelectric type vibration energy collecting and converting device |
| CN113189679A (en) * | 2021-04-20 | 2021-07-30 | 上海宏英智能科技股份有限公司 | Piezoelectric rainfall measuring meter |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |