CN205336157U

CN205336157U - Cydariform piezoelectric power generating device

Info

Publication number: CN205336157U
Application number: CN201620073160.3U
Authority: CN
Inventors: 刘祥建; 鞠全勇; 李晓晖; 罗卫平; 王珺
Original assignee: Jinling Institute of Technology
Current assignee: Jinling Institute of Technology
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2016-06-22
Anticipated expiration: 2026-01-26

Abstract

The utility model discloses a cydariform piezoelectric power generating device, including last rigidity base plate, lower rigidity base plate, PVDF piezoelectricity roof beam, guide post, spring and guide pin bushing. PVDF piezoelectricity roof beam both ends are fixed in two rigidity base plates respectively and are fixed in rigidity base plate down respectively with lower rigidity base plate, guide post and spring, and the guide pin bushing is fixed in the rigidity base plate, a plurality of shape piezoelectricity roof beams of PVDF piezoelectricity liangyou become with the rigidity block group, and every shape piezoelectricity roof beam is constituteed by outside PVDF piezoelectric membrane, arc elastic metal substrate and inboard PVDF piezoelectric membrane, and adjacent door shape piezoelectricity liangyou rigidity piece is connected. This device can convert the alternating pressure among the external environment into the flexural vibrations of PVDF piezoelectricity roof beam, and then realizes the electromechanical energy conversion of device, and it is little to have solved cantilever beam type piezoelectric power generating device bearing capacity, easy problem of breaking under high loading.

Description

A kind of cydariform piezoelectric generating device

Technical field

This utility model relates to novel energy and electronic technology field, particularly relates to a kind of cydariform piezoelectric generating device。

Background technology

In recent years; along with socioeconomic high speed development; the demand of the energy is increased severely day by day, and environmental pollution and energy shortage become a common difficulty of puzzlement countries in the world, and the ecological deterioration caused therefrom and energy crisis start to affect socio-economic development and people's daily life gradually。Under the pressure of this pressure, various countries scientific worker has started searching and the exploration of the development of new energy, such as solar energy, wind energy, wave energy etc.。Vibration is as the common phenomenon in daily life, and owing to it has higher energy density, its potential energy value has caused the concern of increasing researcher。It is presently used for realizing the device of vibrating power-generation and mainly has piezoelectric type, electromagnetic type and electrostatic three kinds。Piezoelectric type vibration TRT with its simple in construction, do not generate heat, without electromagnetic interference and be prone to the plurality of advantages such as microminiaturized and become current study hotspot。Based on this, occur in that various piezoelectric type vibration TRT at present, such as cantilever beam structure, Cymbal structure, stack shape structure etc.。For piezoelectric type vibration TRT, it is only dependent upon the life-span of each components and parts forming vibration generating device, clean environment firendly for electric life in theory, is a kind of typical " green " energy technology。

It should be noted that, the bearing capacity of the cantilever beam type piezoelectric generating device that report is maximum is little at present, it is easy to fracture stronger in high load or dynamic excitation and causes cisco unity malfunction, and such as Cymbal structure, although to stack the piezoelectric generating device bearing capacitys such as shape structure more much larger than cantilever beam type structure, it is contemplated that PZT piezoelectric ceramics belongs to fragile material, therefore, in the random vibration environment of nature, unexpected high load is also possible to cause that PZT piezoelectric ceramics in piezoelectric generating device is excessive and rupture due to deformation。Considering the randomness of vibrational energy resource abundant in external environment and vibration source vibration processes, the high bearing capacity and the bigger deformability that how to realize piezoelectric generating device will be one directions highly studied of piezo-electric generating technical field。

Utility model content

In order to solve above-mentioned Problems existing, this utility model provides a kind of cydariform piezoelectric generating device, excitation in external environment is converted to the bending vibration of PVDF piezoelectric beam in device by this utility model device, and then realize generating, owing to the pliability of PVDF piezoelectric membrane is good, it is provided with spring in a device simultaneously, therefore, piezoelectric generating device can produce bigger deformation and bear higher load, easy to use, extensibility is strong, for reaching this purpose, this utility model provides a kind of cydariform piezoelectric generating device, it is characterized in that: include rigid substrates, lower rigid substrates, PVDF piezoelectric beam, lead, spring and guide pin bushing, described PVDF piezoelectric beam has a pair, described PVDF piezoelectric beam two ends are individually fixed in two rigid substrates and lower rigid substrates end, arranged above with lead in the middle part of described lower rigid substrates, described lead is cased with spring, described guide pin bushing is fixed on lower section in the middle part of rigid substrates, described PVDF piezoelectric beam is made up of at least 2 door shape piezoelectric beams and Stiff Block, each shape piezoelectric beam is by outside P VDF piezoelectric membrane, arc elastic metal substrate and inner side PVDF piezoelectric membrane composition, the end of adjacent door shape piezoelectric beam is connected by Stiff Block。

Further improvement of the utility model, the quantity of described PVDF piezoelectric beam is 2N, and N >=1, and it is M that described each PVDF piezoelectric beam comprises a quantity of shape piezoelectric beam, and M >=1, and this utility model can design corresponding PVDF piezoelectric beam as required。

Further improvement of the utility model, described outside P VDF piezoelectric membrane and inner side PVDF piezoelectric membrane are rectangular shape, and through-thickness polarization, and this utility model PVDF piezoelectric membrane mainly adopts rectangle and through-thickness polarization。

Further improvement of the utility model, described arc elastic metal substrate is rectangular shape, and its pre-bending curvature is changed as required, and this utility model arc elastic metal substrate adopts its pre-bending curvature of rectangle can be changed as required。

After adopting such scheme, this utility model is by arranging rigid substrates, lower rigid substrates, PVDF piezoelectric beam, lead, spring and guide pin bushing, it is possible to the excitation of extraneous natural environment is converted to the bending vibration of PVDF piezoelectric beam in device, it is achieved generating；Meanwhile, in piezoelectric generating device, the quantity of PVDF piezoelectric beam and the quantity of door shape piezoelectric beam can suitably extend, thus improve the generated energy of piezoelectric generating device, enhance the practicality of device。

Accompanying drawing explanation

Fig. 1 is the structural representation of the cross section of door shape piezoelectric beam in this utility model；

Fig. 2 is the structural representation of PVDF piezoelectric beam in this utility model；

Fig. 3 is structural representation of the present utility model。

Concrete parts are as follows:

1, upper rigid substrates；2, lower rigid substrates

3, PVDF piezoelectric beam；31, door shape piezoelectric beam

311, outside P VDF piezoelectric membrane；312, arc elastic metal substrate；

313, inner side PVDF piezoelectric membrane；32, Stiff Block

4, lead；5, spring；

6, guide pin bushing。

Detailed description of the invention

Below in conjunction with accompanying drawing and detailed description of the invention, this utility model is described in further detail:

This utility model provides a kind of cydariform piezoelectric generating device, excitation in external environment is converted to the bending vibration of PVDF piezoelectric beam in device by this utility model device, and then realize generating, owing to the pliability of PVDF piezoelectric membrane is good, being provided with spring in a device, therefore, piezoelectric generating device can produce bigger deformation and bear higher load simultaneously, easy to use, extensibility is strong。

In conjunction with shown in Fig. 1 and Fig. 2, this utility model provides a kind of cydariform piezoelectric generating device, including upper rigid substrates (1), lower rigid substrates 2, PVDF piezoelectric beam 3, lead 4, spring 5 and guide pin bushing 6, introduces separately below。

PVDF piezoelectric beam 3 two ends are individually fixed in two rigid substrates 1 and lower rigid substrates 2, lead 4 and spring 5 are individually fixed in lower rigid substrates 2, and guide pin bushing 6 is fixed on rigid substrates 1；In piezoelectric generating device, the quantity 2N of PVDF piezoelectric beam 3 can select according to practical situation, and N >=1；In PVDF piezoelectric beam 3, the quantity M of door shape piezoelectric beam 31 can select according to practical situation, and M >=1；Coordinate shown in Fig. 1, door shape piezoelectric beam 31 in the present embodiment includes outside P VDF piezoelectric membrane 311, arc elastic metal substrate 312 and inner side PVDF piezoelectric membrane 313, wherein, outside P VDF piezoelectric membrane 311 and inner side PVDF piezoelectric membrane 313 are attached at outer surface and the inner surface of arc elastic metal substrate 312 respectively in the same direction, in order to being electric energy by direct piezoelectric effect by changes mechanical energy, described outside P VDF piezoelectric membrane 311 and the polarization of inner side PVDF piezoelectric membrane 313 through-thickness。

Piezoelectric generating device operationally, is placed in extraneous natural vibration environment, and is fixed by lower rigid substrates 2 by the present embodiment；Dynamic excitation in environment will cause that the PVDF piezoelectric beam 3 in device produces flexural deformation, so that the outside P VDF piezoelectric membrane 311 being pasted onto on arc elastic metal substrate 312 and inner side PVDF piezoelectric membrane 313 produce the change of stress and strain, direct piezoelectric effect according to piezoelectric, the positive and negative electrode face of outside PVDF piezoelectric membrane 311 and inner side PVDF piezoelectric membrane 313 produces positive and negative opposite charge, namely achieves by the conversion of mechanical energy to electric energy。Owing to the pliability of PVDF piezoelectric membrane is good, it is provided with spring 5 in a device simultaneously, therefore, piezoelectric generating device can produce bigger deformation and bear higher load, in addition, owing to piezoelectric generating device can arrange greater number of PVDF piezoelectric beam 3, and PVDF piezoelectric beam 3 can arrange greater number of door shape piezoelectric beam 31, thus improve the generated energy of piezoelectric generating device。

The above; it it is only preferred embodiment of the present utility model; it is not the restriction that this utility model is made any other form, and any amendment made according to technical spirit of the present utility model or equivalent variations, still fall within this utility model scope required for protection。

Claims

1. a cydariform piezoelectric generating device, it is characterized in that: include rigid substrates (1), lower rigid substrates (2), PVDF piezoelectric beam (3), lead (4), spring (5) and guide pin bushing (6), it is characterized in that, described PVDF piezoelectric beam (3) has a pair, described PVDF piezoelectric beam (3) two ends are individually fixed in two rigid substrates (1) and lower rigid substrates (2) end, described lower rigid substrates (2) middle part is arranged above with lead (4), described lead (4) is cased with spring (5), described guide pin bushing (6) is fixed on lower section, rigid substrates (1) middle part, described PVDF piezoelectric beam (3) is made up of at least 2 doors shape piezoelectric beam (31) and Stiff Block (32), each shape piezoelectric beam (31) is by outside P VDF piezoelectric membrane (311), arc elastic metal substrate (312) and inner side PVDF piezoelectric membrane (313) composition, the end of adjacent door shape piezoelectric beam is connected by Stiff Block (32)。

2. a kind of cydariform piezoelectric generating device as claimed in claim 1, it is characterised in that: the quantity of described PVDF piezoelectric beam (3) is 2N, and N >=1。

3. a kind of cydariform piezoelectric generating device as claimed in claim 1, it is characterised in that: it is M that described each PVDF piezoelectric beam (3) comprises a quantity of shape piezoelectric beam (31), and M >=1。

4. a kind of cydariform piezoelectric generating device as claimed in claim 1, it is characterised in that: described outside P VDF piezoelectric membrane (31) and inner side PVDF piezoelectric membrane (33) they are rectangular shape, and through-thickness polarization。