CN202617040U - Piezoelectric energy harvester for recovering fluid pressure pulsation energy - Google Patents
Piezoelectric energy harvester for recovering fluid pressure pulsation energy Download PDFInfo
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- CN202617040U CN202617040U CN 201220262255 CN201220262255U CN202617040U CN 202617040 U CN202617040 U CN 202617040U CN 201220262255 CN201220262255 CN 201220262255 CN 201220262255 U CN201220262255 U CN 201220262255U CN 202617040 U CN202617040 U CN 202617040U
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- 239000012530 fluid Substances 0.000 title claims abstract description 60
- 230000010349 pulsation Effects 0.000 title claims abstract description 30
- 230000006835 compression Effects 0.000 claims description 7
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- 230000003068 static effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract 2
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- 238000000034 method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 4
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- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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Abstract
The utility model relates to a piezoelectric energy harvester for recovering fluid pressure pulsation energy and belongs to the technical fields of new energy power generation and fluid pressure pulsation suppression. According to the piezoelectric energy harvester, a first cylinder is fixed on a base through a screw; a circuit board and a stop valve are respectively fixed on a side wall of the first cylinder through a screw and a pipeline; a second cylinder is fixed on the first cylinder through a screw; a piston is pressed inside the second cylinder through a first spring and a second spring, and the second cylinder is separated into a first cavity and a second cavity; the side wall of the first cavity is provided with a fluid inlet and a fluid outlet; the second cavity is communicated with the first cylinder through a through hole in the upper end of the first cylinder; and 1 to 50 piezoelectric transducers are pressed in the cavity of the first cylinder. The piezoelectric energy harvester has the advantages that the motion and energy are transmitted by utilizing a liquid medium, so that a plurality of piezoelectric vibrators synchronously generate power, and the phenomenon that the piezoelectric vibrators are in contact with each other due to excessive deformation, and then are damaged can be avoided; and moreover, the harvester is simple in structure, high in power generation capacity and high in reliability.
Description
Technical field
The utility model belongs to the generation of electricity by new energy technology and the fluid pressure pulsation suppresses technical field, is specifically related to a kind of piezo crystals chip energy accumulator, is used for hydraulic fluid pulsation energy recuperation generating and pulsation thereof and suppresses.
Background technology
The research that utilizes piezoceramic material to reclaim the environmental energy generating has become the focus of domestic and international lasting for years.The successful development and utilization of piezoelectric generating device; Not only can solve the waste battery contaminated environment, produce the wasting of resources problem that battery caused, most importantly also can solve the real-time powerup issue in fields such as portable type electronic product, remote sensing monitoring and vibration control.According to different environment form of energy and application purpose, polytype piezoelectric generating device has all been proposed at present both at home and abroad, be mainly used in generatings such as reclaiming ambient vibration energy, wind energy and wave Wave energy.The energy in above-mentioned various natural environments, another kind can be the fluid pulsation energy that is present in all kinds of hydraulic systems by the energy of effective recycling, but the research that is used to reclaim this type of energy generating at present also seldom.
Owing to the alternately open and close of the pulsation output of pump in the hydraulic system, all kinds of control valves and the reasons such as real-time change of load size, can cause pulsation, vibratory impulse and the noise of fluid pressure inevitably; When the hydraulic pulsation frequency is close with the hydraulic system natural frequency, also can cause system resonance, thereby reduce system works performance and useful life, also will cause system's damage when serious even cause major accident.Therefore, the hydraulic system pressure pulsation suppresses and technology for eliminating is the focal issue that people pay close attention to always, has proposed polytype master, passive type pressure fluctuation control method at present.Active control method is to utilize driver to produce mechanical to suppress pulsation; It is effective, environmental suitability is strong; But need sensing, driver control valve, reach signal processor etc.; Not only system's bulky complex, cost are high, have also reduced reliably and stable, and most critical is to continue, stablize, be difficult to assurance in the sufficient external energy supply reality.Therefore, in the not high occasion of control effect requirements, be main also at present with passive control methods.So-called passive type control; Be to pulse through the method realization fluid pressure of dissipation energy to suppress; Compare with active method its system constitute simple, cost is low, technology is ripe, but pulsation suppresses effect and versatility is relatively poor, the energy of fluid pressure pulsation is wasted.It is thus clear that; Existing master, passive type fluid pressure pulsation control technology all have certain limitation and deficiency; Energy-autarchic, volume are little, compact conformation, intensity height, highly versatile, control is effective and the active fluid pressure pulsation that is applicable to the broadband complex environment suppress with technology for eliminating be that a lot of field is badly in need of; For realizing this purpose, at first must reclaim the hydraulic pulsation energy effectively.
Summary of the invention
The utility model proposes a kind of piezoelectric harvester that is used for fluid pressure pulsation energy recuperation, for active hydraulic fluid pressure pulsation control provides the energy supply.
The embodiment that the utility model adopts is: on base, circuit board and break valve are fixed on the sidewall of first cylinder body respectively to first cylinder body through screw and pipeline through screw, and second cylinder body passes through screw on first cylinder body; Piston is crimped on second cylinder interior, also said second cylinder body is separated into first chamber and second chamber through first spring and second spring; The sidewall in said first chamber is provided with fluid inlet and outlet, and said second chamber is communicated with first cylinder chamber through the through hole of first cylinder body upper end; 1-50 PZT (piezoelectric transducer) is crimped in first cylinder chamber, and said PZT (piezoelectric transducer) is made up of ring support and a pair of piezoelectric vibrator, and said ring support and described a pair of piezoelectric vibrator constitute airtight transducer cavity; Two piezoelectric vibrators in the same PZT (piezoelectric transducer) are through one parallel connection of lead group, and the piezoelectric vibrator between the different PZT (piezoelectric transducer)s is through two parallel connections of lead group, and said piezoelectric vibrator also links to each other with ECU on the circuit board through lead group three.
In the utility model, the effect of first spring and second spring is the movement position of limited piston.When the fluid pressure in first chamber of second cylinder body is rated pressure, is that the fluid pressure pulsating quantity is when being zero; Piston is in poised state under the acting in conjunction of the fluid pressure and first and second springs; The interior fluid pressure of first cylinder chamber this moment is zero, and the piezoelectric vibrator in the PZT (piezoelectric transducer) does not produce flexural deformation.For realizing this purpose; The method that adopts in the utility model is: utilize two springs that rigidity is different; And make between its rigidity and pre compressed magnitude and to satisfy following relation:
; Wherein
,
are respectively the rigidity of first and second spring; Pre compressed magnitude when
,
are respectively first and second spring static;
is piston area, and
is specified fluid pressure.
When the real fluid pressure P in first chamber of second cylinder body is higher or lower than rated pressure
; Piston will move downward or upward; Fluid pressure in first cylinder chamber increases or reduces, thereby forces whole piezoelectric vibrators to produce flexural deformation simultaneously and the power conversion of fluid pressure pulsation is become electric energy.When fluid pressure is pulsed excessive and adjacent piezoelectric vibrator centre is in contact with one another; First spring or second spring reach maximum compressible amount; Be that spring no longer is compressed; The fluid pressure of pulsation is delivered to first cylinder housing or second cylinder housing through Piston Compression first spring or second spring, thereby the protection piezoelectric vibrator is because of being out of shape excessive the damage.For realizing this purpose; The method that the utility model is taked is: make the dynamic compressible amount of two springs identical; Be that two springs can be identical by the amount of further compression when departing from the equilbrium position for piston 4; And have:
; Wherein
is the dynamic compression amount of two springs;
is piezoelectric vibrator quantity,
caused the first cylinder chamber inner fluid volume change by single piezoelectric vibrator distortion back.
The characteristics and the advantage of the utility model are:
utilizes liquid medium transmission campaign and energy; Need not any mechanical moving element and can make a plurality of PZT (piezoelectric transducer) synchronous workings, so system configuration is simple, generating capacity is strong; The drum type PZT (piezoelectric transducer) rigidity that
adopts the chip-type piezoelectric vibrator to constitute is low, and less fluid pressure pulsation can make the reciprocal crooked deformation of its generation concurrent; And spacing through spring when the fluid pressure pulsation is big, can prevent that the piezoelectric vibrator centre is because of being out of shape excessive the damage, so energy conversion efficiency and reliability are higher; In the time of
piezoelectric vibrator flexural deformation generating; Also have the effect that the fluid pressure pulsation suppresses, be the process of inhibition of consuming type hydraulic fluid pressure pulsation on the process nature of energy recuperation.
Description of drawings
Fig. 1 is the structure cut-away view under the piezo crystals chip energy accumulator inactive state in preferred embodiment of the utility model;
Fig. 2 is the structural profile sketch map of PZT (piezoelectric transducer) in preferred embodiment of the utility model;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structure cut-away view of piezo crystals chip energy accumulator when fluid pressure increases in preferred embodiment of the utility model;
Fig. 5 is the structure cut-away view of piezo crystals chip energy accumulator when fluid pressure reduces in preferred embodiment of the utility model.
Embodiment
As shown in Figure 1, on base 1, circuit board 12 and break valve 7 are fixed on the sidewall of first cylinder body 2 respectively to first cylinder body 2 through screw and pipeline through screw, and second cylinder body 3 passes through screw on first cylinder body 2; Piston 4 through first spring 5 and second spring 6 be crimped on second cylinder body 3 inside, and said second cylinder body 3 is separated into the first chamber C1 and the second chamber C2; The sidewall of the said first chamber C1 is provided with fluid inlet 3-1 and outlet 3-2, and the said second chamber C2 is communicated with the first cylinder chamber C3 through the through hole 2-2 of first cylinder body, 2 upper end 2-1; 1-50 PZT (piezoelectric transducer) 8 is crimped in the first cylinder chamber C3, and said PZT (piezoelectric transducer) 8 is made up of ring support 8-1 and a pair of piezoelectric vibrator 8-2, and said ring support 8-1 and a pair of piezoelectric vibrator 8-2 constitute airtight transducer cavity C 4; Two piezoelectric vibrator 8-2 in the same PZT (piezoelectric transducer) 8 are through one 9 parallel connections of lead group; The piezoelectric vibrator 8-2 that different PZT (piezoelectric transducer)s are 8 is through 2 10 parallel connections of lead group, and said piezoelectric vibrator 8-2 also is connected with ECU on the circuit board 12 through lead group 3 11.
As shown in Figures 2 and 3, the ring support 8-1 of PZT (piezoelectric transducer) 8 is provided with 4 groove 8-1-1, is used for through connecting lead and liquid, and piezoelectric vibrator 8-2 structure takes substrate 8-2-1 to be fixedly connected with piezoelectric chip 8-2-2.
As shown in Figure 1, in the utility model, the effect of first spring 5 and second spring 6 is movement positions of limited piston 4.When the fluid pressure in the first chamber C1 of second cylinder body 3 is rated pressure, is that the fluid pressure pulsating quantity is when being zero; Piston 4 is in poised state under the acting in conjunction of the fluid pressure and first and second springs; The interior fluid pressure of first cylinder chamber C3 this moment is zero, and the piezoelectric vibrator 8-2 in the PZT (piezoelectric transducer) 8 does not produce flexural deformation.For realizing this purpose; The method that adopts in the utility model is: utilize two springs that rigidity is different; And make between its rigidity and pre compressed magnitude and to satisfy following relation:
; Wherein
,
are respectively the rigidity of first spring 5 and second spring 6; Pre compressed magnitude when
,
are respectively first spring 5 and second spring 6 static;
is the area of piston 4, and
is specified fluid pressure.
As shown in Figure 4; When the fluid pressure in the first chamber C1 of second cylinder body 3 is higher than rated pressure
; Piston 4 moves downward under the fluid pressure action that increases; Fluid pressure in the second chamber C2 of second cylinder body 3 raises and the through hole 2-1 through first cylinder body, 2 upper ends gets in the first cylinder chamber C3; Cause the fluid pressure in the said first cylinder chamber C3 to increase, promptly the suffered fluid pressure of piezoelectric vibrator 8-2 outer surface increases; Because of PZT (piezoelectric transducer) 8 is an enclosed construction, liquid can not get in the transducer cavity C 4, so piezoelectric vibrator 8-2 to the distortion of direction that transducer cavity C 4 volumes are reduced, and becomes electric energy with the pressure fluctuation power conversion of fluid.
As shown in Figure 5; When the fluid pressure in the first chamber C1 of second cylinder body 3 is lower than rated pressure P0; Piston 4 moves upward under the fluid pressure action that reduces, and the fluid pressure in the second chamber C2 of second cylinder body 3 and the first cylinder chamber C3 reduces, and promptly the suffered fluid pressure of piezoelectric vibrator 8-2 outer surface reduces; Cause piezoelectric vibrator 8-2 to the direction distortion that transducer cavity C 4 volumes are increased, and the pressure fluctuation power conversion of fluid is become electric energy.
Like Fig. 4, shown in Figure 5; Excessive and when the centre of adjacent piezoelectric vibrator 8-3 is in contact with one another when the real fluid pressure in the first chamber C1 of second cylinder body 3; First spring 5 or second spring 6 reach maximum compressible amount; Promptly no longer be compressed, the fluid pressure of pulsation is delivered to first cylinder housing 1 or second cylinder housing 2 through piston 4 compression first springs 5 or second spring 6, thereby protection piezoelectric vibrator 8-2 is because of being out of shape excessive the damage.For realizing this purpose; The method that the utility model is taked is to make the dynamic compressible amount of two springs identical; Be that two springs can be identical by the amount of further compression when departing from the equilbrium position for piston 4; And have:
; Wherein
is the dynamic compression amount of two springs;
is the quantity of piezoelectric vibrator 8-2,
caused the first cylinder chamber C3 inner fluid volume change by single piezoelectric vibrator 8-2 distortion back.
Claims (3)
1. piezoelectric harvester that is used for fluid pressure pulsation energy recuperation; It is characterized in that: first cylinder body passes through screw on base; Circuit board and break valve are fixed on the sidewall of first cylinder body respectively through screw and pipeline, second cylinder body passes through screw on first cylinder body; Piston is crimped on second cylinder interior, also said second cylinder body is separated into first chamber and second chamber through first spring and second spring; The sidewall in said first chamber is provided with fluid inlet and outlet, and said second chamber is communicated with first cylinder chamber through the through hole of first cylinder body upper end; 1-50 PZT (piezoelectric transducer) is crimped in first cylinder chamber, and said PZT (piezoelectric transducer) is made up of ring support and a pair of piezoelectric vibrator, and said ring support and described a pair of piezoelectric vibrator constitute airtight transducer cavity; Two piezoelectric vibrators in the same PZT (piezoelectric transducer) are through one parallel connection of lead group, and the piezoelectric vibrator between the different PZT (piezoelectric transducer)s is through two parallel connections of lead group, and said piezoelectric vibrator also links to each other with ECU on the circuit board through lead group three.
2. the piezoelectric harvester that is used for fluid pressure pulsation energy recuperation according to claim 1; It is characterized in that: first spring is two springs that rigidity is different with second spring; And make between its rigidity and pre compressed magnitude and to satisfy following relation:
; Wherein
,
are respectively the rigidity of first spring and second spring; Pre compressed magnitude when
,
are respectively first spring and second spring static state;
is piston area, and
is specified fluid pressure.
3. the piezoelectric harvester that is used for fluid pressure pulsation energy recuperation according to claim 1; It is characterized in that: the dynamic compressible amount of first spring and second spring is identical; Be
; Wherein
is the dynamic compression amount of two springs;
is piezoelectric vibrator quantity,
be the caused fluid volume variable quantity in single piezoelectric vibrator distortion back.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220262255 CN202617040U (en) | 2012-06-01 | 2012-06-01 | Piezoelectric energy harvester for recovering fluid pressure pulsation energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220262255 CN202617040U (en) | 2012-06-01 | 2012-06-01 | Piezoelectric energy harvester for recovering fluid pressure pulsation energy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664556A (en) * | 2012-06-01 | 2012-09-12 | 浙江师范大学 | Piezoelectric energy harvester for recovering pressure pulsation energy of liquid |
| CN103997254A (en) * | 2014-05-28 | 2014-08-20 | 吉林大学 | Piezoelectric driving type software displacement driver |
| CN105978401A (en) * | 2016-06-15 | 2016-09-28 | 浙江师范大学 | Power supply device of oil pipeline monitoring system |
| EP3133729A4 (en) * | 2014-04-17 | 2017-12-13 | Soundpower corporation | Power generation system |
| ES2686420A1 (en) * | 2018-06-12 | 2018-10-17 | Iñigo Lizari Illarramendi S.L. | Procedure for the generation of piezoelectricity by liquid interaction of alternating pressure and apparatus for its implementation (Machine-translation by Google Translate, not legally binding) |
-
2012
- 2012-06-01 CN CN 201220262255 patent/CN202617040U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664556A (en) * | 2012-06-01 | 2012-09-12 | 浙江师范大学 | Piezoelectric energy harvester for recovering pressure pulsation energy of liquid |
| EP3133729A4 (en) * | 2014-04-17 | 2017-12-13 | Soundpower corporation | Power generation system |
| CN103997254A (en) * | 2014-05-28 | 2014-08-20 | 吉林大学 | Piezoelectric driving type software displacement driver |
| CN105978401A (en) * | 2016-06-15 | 2016-09-28 | 浙江师范大学 | Power supply device of oil pipeline monitoring system |
| ES2686420A1 (en) * | 2018-06-12 | 2018-10-17 | Iñigo Lizari Illarramendi S.L. | Procedure for the generation of piezoelectricity by liquid interaction of alternating pressure and apparatus for its implementation (Machine-translation by Google Translate, not legally binding) |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20130601 |