CN103762892A - Phononic crystal power generating device based on torsional vibration band gaps - Google Patents
Phononic crystal power generating device based on torsional vibration band gaps Download PDFInfo
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- CN103762892A CN103762892A CN201410022603.1A CN201410022603A CN103762892A CN 103762892 A CN103762892 A CN 103762892A CN 201410022603 A CN201410022603 A CN 201410022603A CN 103762892 A CN103762892 A CN 103762892A
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Abstract
The invention provides a phononic crystal power generating device based on torsional vibration band gaps. The phononic crystal power generating device comprises a main shaft and branch beams. Piezoelectric materials and mass blocks are arranged on the branch beams to compose at least two rows of local area vibrator units. The local area vibrator units of the same structure are installed on the main shaft to compose a phononic crystal structure, wherein the local area vibrator units in the same row are distributed at equal intervals, the interval between every two local area vibrator units in one row is the same as that in another row, and the local area vibrator units are distributed on the cross section of the main shaft at equal intervals. According to the phononic crystal power generating device based on the crystal torsional vibration band gaps, the piezoelectric technology is utilized for conducting energy conversion, the phononic crystal technology is adopted to achieve broadband efficient power generation of the power generating device in the vibration environment, the structure is simple, manufacturing is convenient, the torsional vibration power generation frequency band of a piezoelectric vibration device is effectively broadened, active control is not needed, and the requirement for the working environment is low. The phononic crystal power generating device can be used for supplying power to microelectronic products such as a wireless sensor for detecting the operating state of a rotary machine.
Description
Technical field
What the present invention relates to is a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT), specifically a kind of wideband vibration generating device that utilizes phonon crystal twisting vibration band gap principle being applicable in vibration noise environment.
Background technology
In recent years, along with the development of integrated circuit technique and micro-/receive Mechatronic Systems technology, microelectronic product is widely used in the key areas such as wireless network node, environmental monitoring, automobile, building.The at present development of microelectronic product is limited to the problems such as the microminiaturization of power supply device and life span, so micro-power technology of Development of Novel is very important.Current, the chemical power source scheme majority that MEMS (micro electro mechanical system) adopts is only suitable for the short life cycle, and be difficult to tackle the ever-increasing wireless network node of quantity, and vibration generating device based on piezoelectric effect, although can only produce little other electric power of level, can meet micro-power consumption system requirement, and its vibration source utilizing be ubiquitous, possess and be not subject to the advantages such as place restriction, activity be strong, therefore adopt piezoelectricity oscillating generating set can solve the self-energy supply problem of MEMS (micro electro mechanical system).
The more cantilever beam electrification structure of current research faces the problem of " resonance frequency is single, and generating efficiency is low ".For improving generating efficiency, widen generating frequency band, conventional method has two kinds at present: one, self-adjusting method initiatively, the variation of vibration frequency thereby self natural frequency by ACTIVE CONTROL adjusting device conforms; Two, passive self-adjusting method, i.e. the combination of the Blast Furnace Top Gas Recovery Turbine Unit (TRT) by a plurality of different natural frequencies reaches opens up wide band effect.Two kinds of methods all have shortcoming, and the former self consumes energy large, and the size of the latter's device and design cost all significantly increase.In " frequency analysis of many cantilever beam piezoelectric vibrators and the generator experimental research " of the middle publication of < < XI AN JIAOTONG UNIVERSITY Subject Index > > the 2nd phase the 44th volume February in 2010, a kind of many cantilever beam piezoelectric vibrators structure has been proposed, belong to passive self-adjusting category, some different cantilever beam oscillators are connected on same matrix, thereby the generating frequency band of Blast Furnace Top Gas Recovery Turbine Unit (TRT) is widened to 56-65Hz, and improved energy output.But this structure is that different cantilever beams is arranged on same matrix, the design of cantilever beam is complicated, and production cost is high.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, easily manufactured, can widen the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap of twisting vibration generating frequency band.
The object of the present invention is achieved like this:
It comprises main shaft and strutbeam, piezoelectric and mass are installed on strutbeam and are formed local oscillator unit, on main shaft, the installation at least two identical local oscillator unit of row's structures form phonon crystal structure, the local oscillator unit composition phonon crystal structure that at least two row's structures are identical is installed on described main shaft and refers to: with each local oscillator unit in row, equidistantly distribute; The spacing of each row's local oscillator unit equates; On the cross section of main shaft, each oscillator unit, composition territory equidistantly distributes.
The present invention can also comprise:
1, the identical local oscillator unit of 3-4 row structure is installed on main shaft and is formed phonon crystal structure.
2, the cross section of main shaft is circular.
4, the cross section of main shaft is square.
5, described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam one side, is bonded in the mass of beam end one side.
6, described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides, is bonded in the mass of beam end one side.
7, described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides, is bonded in the mass of a beam end both sides.
The present invention designs for the electric power supply of microelectronic product, utilizes piezo technology to carry out power conversion, and adopts phonon crystal technology to realize the high-efficient wide-frequency generating of Blast Furnace Top Gas Recovery Turbine Unit (TRT) in vibration environment.Its principle is at the circumferential uniform some generating strutbeams (local oscillator) of girder section, and equidistantly arrange some groups of such unit at axial direction, form local resonance type phonon crystal axle construction, by the dynamic absorber of local oscillator and mutual coupling, produce the twisting vibration band gap of different center frequency and different bandwidth, the twisting vibration of rotating machinery is converted to electric energy, the final wideband generating effect of utilizing twisting vibration that realizes.
The present invention is a kind of piezoelectric generating device that utilizes mechanical twisting vibrating power-generation in operational environment.Scheme is by some identical cantilever beam oscillators, is equidistantly arranged on girder, forms local resonance type phonon crystal structure.Utilize the twisting vibration band gap of local resonance type phonon crystal generation, effectively widen the bandwidth of device generating frequency band, improve the generating efficiency of device.Compare with the cascaded structure in background technology, the present invention, mainly for mechanical twisting vibrating power-generation, widens in principle and has fundamental difference in band gap, possesses the feature that design cost is low, energy output is high simultaneously.
Overall structure of the present invention is simple, easily manufactured in a word, and the twisting vibration generating frequency band of piezoelectric vibrating device has been carried out effectively widening, without ACTIVE CONTROL, lower to the requirement of operational environment.Can be used for detecting the energy supply etc. of the microelectronic products such as wireless senser of rotating machinery operation conditions.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of execution mode of the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on twisting vibration band gap of the present invention.
Fig. 2 is the structural representation of bimorph double quality blocks local oscillator.
Fig. 3 is the structural representation of the second execution mode of the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on twisting vibration band gap of the present invention.
Fig. 4 is the structural representation of the third execution mode of the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on twisting vibration band gap of the present invention.
Fig. 5 is bimorph single mass local oscillator schematic three dimensional views.
Fig. 6 is single piezoelectric patches single mass local oscillator schematic three dimensional views.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail.
The composition of the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap of the present invention mainly comprises main shaft 1, strutbeam 2, mass 3, piezoelectric 4.Main shaft 1 is for being connected with the support of vibration environment or directly as support, material is silicon, metal or elastomeric material etc.; Strutbeam 2 materials are silicon or metal; Mass 3 materials are the metals such as copper, nickel; Piezoelectric 4 materials are piezoelectric ceramic or piezoelectric membrane.Mass 3 waits reasonable process mode to be bonded on strutbeam 2 with piezoelectric 4 by bonding, form local oscillator, local oscillator is equidistantly arranged on main shaft 1 by modes such as welding, embedding connections as unit, thereby form phonon crystal axle construction, the surface of the piezoelectric on each local oscillator unit is parallel to the axis of main shaft.The physical dimension of local oscillator and main shaft etc. and the number of cycles of phonon crystal can be adjusted as required, and this device is converted into mechanical twisting vibration after electric energy, by rectifier, process for storing or energy supply.
According to local oscillator element solder or embedding, be mounted on the layout difference on main shaft, can form multiple embodiment of the present invention.
In conjunction with Fig. 1, the cross section of main shaft is circular, axial installation 3 oscillator unit, composition territory along main shaft, 3 oscillator unit, composition territories are equidistantly to distribute on circular cross section, spacing in same row between each local oscillator unit equates, spacing between different rows' local oscillator unit is also equal, and the structure of all local oscillators unit is identical.
In conjunction with Fig. 2,5 or 6, local oscillator unit can be a kind of in following three kinds of forms: what Fig. 2 provided is bimorph double quality blocks local oscillator structure, the mass that local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides and is bonded in a beam end both sides; What Fig. 5 provided is bimorph single mass local oscillator structure, the mass that local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides and is bonded in beam end one side; What Fig. 6 provided is single piezoelectric patches single mass local oscillator structure, local oscillator unit comprise strutbeam, be bonded in strutbeam one side piezoelectric and, be bonded in the mass of beam end one side.
In conjunction with Fig. 3 or Fig. 4, it is on the basis of the embodiment shown in Fig. 1, other two kinds of embodiments that the installation row of the local oscillator unit on change main shaft forms.What Fig. 3 provided is the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) of circumferential uniform pair of oscillator; Fig. 4 is the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) of circumferential uniform four oscillators.
Can certainly change the shape of the cross section of main shaft, such as the cross section of main shaft is designed to square, equilateral triangle etc.
During actual use, should be taken into account following several factor.
(1). girder and local oscillator structure.According to ambient vibration situation and equipment electric weight demand, can change girder or local oscillator structure, as Fig. 3,4,5,6.In order to improve, energy output can change bimorph into single piezoelectric patches, single mass changes double quality blocks into; When extraneous vibration is comparatively violent, can increases the number of axial strutbeam, thereby put forward high-octane utilance.
(2). the material of main shaft and local oscillator.Different according to ambient vibration frequency, adjust the composition material of main shaft and local oscillator, thereby the generating frequency band of equipment and external environment frequency are matched.
(3). the periodicity of phonon crystal.According to physical dimension requirement, energy output size, frequency band range etc., can adjust the number of cycles of phonon crystal.
Claims (6)
1. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap, comprise main shaft and strutbeam, piezoelectric and mass are installed on strutbeam and are formed local oscillator unit, it is characterized in that: on main shaft, the installation at least two identical local oscillator unit of row's structures form phonon crystal structure, the local oscillator unit composition phonon crystal structure that at least two row's structures are identical is installed on described main shaft and refers to: with each local oscillator unit in row, equidistantly distribute; The spacing of each row's local oscillator unit equates; On the cross section of main shaft, each oscillator unit, composition territory equidistantly distributes.
2. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap according to claim 1, is characterized in that: the identical local oscillator unit of 3-4 row structure is installed on main shaft and is formed phonon crystal structure.
3. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap according to claim 1 and 2, is characterized in that: the cross section of main shaft is for circular.
4. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap according to claim 3, is characterized in that: described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam one side, is bonded in the mass of beam end one side.
5. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap according to claim 3, is characterized in that: described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides, is bonded in the mass of beam end one side.
6. the phonon crystal Blast Furnace Top Gas Recovery Turbine Unit (TRT) based on torsional oscillation band gap according to claim 3, is characterized in that: described local oscillator unit comprises strutbeam, is bonded in the piezoelectric of strutbeam both sides, is bonded in the mass of a beam end both sides.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230313A (en) * | 2016-09-14 | 2016-12-14 | 长春工业大学 | The torsional mode piezoelectric generating device of the dijection head piece jet excitation of Internet of things node energy supply |
| CN109067241A (en) * | 2018-08-07 | 2018-12-21 | 辽宁工程技术大学 | A kind of electric vehicle terminal continuation of the journey system collected based on piezoelectric vibration energy |
| CN112878115A (en) * | 2021-01-13 | 2021-06-01 | 北京铁科特种工程技术有限公司 | Intelligent aggregate and multi-frequency resonant network layer |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108649837B (en) * | 2018-06-12 | 2021-03-02 | 东北石油大学 | Piezoelectric energy storage device for oil well underground detection equipment |
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| US20090294638A1 (en) * | 2005-01-07 | 2009-12-03 | Trustees Of Boston University | Nanomechanical Oscillator |
| CN102723894A (en) * | 2012-05-28 | 2012-10-10 | 南京航空航天大学 | Rotary piezoelectric generation device |
| CN102931878A (en) * | 2012-10-26 | 2013-02-13 | 北京理工大学 | Multi-cantilever broadband MEMS (micro-electromechanical system) piezoelectric energy harvester |
| CN103227586A (en) * | 2013-04-12 | 2013-07-31 | 南京航空航天大学 | Branch cantilever beam vibration generator and power generation method thereof |
| CN203151398U (en) * | 2013-03-08 | 2013-08-21 | 苏州市职业大学 | Columnar multi direction piezoelectric power generation device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090294638A1 (en) * | 2005-01-07 | 2009-12-03 | Trustees Of Boston University | Nanomechanical Oscillator |
| CN102723894A (en) * | 2012-05-28 | 2012-10-10 | 南京航空航天大学 | Rotary piezoelectric generation device |
| CN102931878A (en) * | 2012-10-26 | 2013-02-13 | 北京理工大学 | Multi-cantilever broadband MEMS (micro-electromechanical system) piezoelectric energy harvester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230313A (en) * | 2016-09-14 | 2016-12-14 | 长春工业大学 | The torsional mode piezoelectric generating device of the dijection head piece jet excitation of Internet of things node energy supply |
| CN106230313B (en) * | 2016-09-14 | 2018-01-02 | 长春工业大学 | The torsional mode piezoelectric generating device of the dijection head piece jet excitation of Internet of things node energy supply |
| CN109067241A (en) * | 2018-08-07 | 2018-12-21 | 辽宁工程技术大学 | A kind of electric vehicle terminal continuation of the journey system collected based on piezoelectric vibration energy |
| CN112878115A (en) * | 2021-01-13 | 2021-06-01 | 北京铁科特种工程技术有限公司 | Intelligent aggregate and multi-frequency resonant network layer |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
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