CN204921494U - Alternative piezoelectricity electric fan of working of longe -lived binary - Google Patents
Alternative piezoelectricity electric fan of working of longe -lived binary Download PDFInfo
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- CN204921494U CN204921494U CN201520612322.1U CN201520612322U CN204921494U CN 204921494 U CN204921494 U CN 204921494U CN 201520612322 U CN201520612322 U CN 201520612322U CN 204921494 U CN204921494 U CN 204921494U
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Abstract
The utility model discloses an alternative piezoelectricity electric fan of working of longe -lived binary, including 2 piezoceramics pieces, combined material layer and blades, 2 piezoceramics pieces according to piezoceramics polarity be +, , the mode or according to piezoceramics polarity for -, , the mode respectively the adhesion on the upper and lower corresponding two sides on combined material layer, piezoceramics piece and power link to each other, combined material layer ground connection or meet V+. The utility model discloses a combined material layer is fibre layers or sheetmetal to directly grounded or meet V+ uses as the fixed electrode, improves its working life greatly, the combined material layer can directly be extended and become the blade, simplifies the product structure, has fine practicality, can produce better economic benefits and social effect.
Description
Technical field
The utility model belongs to piezoelectricity electric fan technical field, is specifically related to the binary alternation piezoelectricity electric fan of length of a kind of life-span.
Background technique
At present, piezoelectricity electric fan main structural components is made up of piezoelectric fan blade and piezoelectric fan power source driving two large divisions, its working principle is that piezoelectric constant is under the effect of electric field, utilize the piezoelectric property that piezoelectric constant is exclusive, namely utilize the inverse piezoelectric effect of piezoelectric constant, when being energized, piezoelectric constant can produce vibration and displacement, and by mechanical transmission, finally reach wind direction stablize, at a high speed, can the good cooling-down effect of long-term work.Existing fan blade forms by ceramic plate is bonding, and drives with Ac, and work reaching under piezoelectric ceramic point of resonance for a long time, piezoelectric constant is very tired, and be easy to produce cracked, the life-span is very short, can't meet user demand completely.
Be in the previous research of the applicant of CN103580536A at Chinese patent application publication number, disclose a kind of binary alternation piezoelectricity electric fan, main structure comprises piezoelectric ceramic, composite layer and tinsel; Piezoelectric ceramic has 2, and a slice polarised direction is just, another sheet polarised direction is negative, sticks on the corresponding two sides of composite layer respectively; One end of piezoelectric ceramic is connected with tinsel, and the other end is connected with electrode, and a slice is wherein connected with negative pole, and another sheet is connected with positive pole.This binary alternation piezoelectricity electric fan, adopts binary alternation, makes piezoelectric constant have half the time to have a rest, and reduces the overtired of piezoelectric constant, greatly improves its operating life; Piezoelectric ceramic is bonded in composite material both sides, not only can reduces piezoelectric constant internal stress, improve the pliability of blade, piezoelectric electro pectinid also can be made to reach the best amplitude of oscillation, ensure the optimum efficiency of fan; Use tinsel as metallic amplifier, its material selection high duty alloy material, has good elasticity, reaches best fan effect.This product visible well improves the working life of piezoelectricity electric fan, but its composite layer is control electrode, positive and negative variable, has higher requirement to the selection of composite layer.
Model utility content
Goal of the invention: for the deficiencies in the prior art, the purpose of this utility model is to provide the binary alternation piezoelectricity electric fan of length of a kind of life-span, and the direct ground connection of composite layer, improves its operating life greatly.
Technological scheme: for achieving the above object, the technical solution adopted in the utility model is as follows:
The binary alternation piezoelectricity electric fan that life-span is long, comprises 2 piezoelectric ceramics, composite layer and blades; 2 described piezoelectric ceramics according to piezoelectric constant polarity for+,-,-,+mode sticks on the corresponding up and down two sides of composite layer respectively, described piezoelectric ceramic is connected with power supply, composite layer ground connection.
Described piezoelectric ceramic is piezoelectric crystal d
33be greater than the piezoelectric constant of 750.
Described composite layer is carbon fiber layer or tinsel.
Described blade is bonded in the free end of piezoelectric constant.
Described composite layer stretches out from piezoelectric ceramic top, forms blade.
The binary alternation piezoelectricity electric fan that life-span is long, comprises 2 piezoelectric ceramics, composite layer and blades; 2 described piezoelectric ceramics according to piezoelectric constant polarity for-,+,+,-mode sticks on the corresponding up and down two sides of composite layer respectively, described piezoelectric ceramic is connected with power supply, and composite layer meets V+.
Described piezoelectric ceramic is piezoelectric crystal d
33be greater than the piezoelectric constant of 750.
Described composite layer is carbon fiber layer or tinsel.
Described blade is bonded in the free end of piezoelectric constant.
Beneficial effect: compared with prior art, the binary alternation piezoelectricity electric fan that the life-span of the present utility model is long, tool has the following advantages:
(1) adopt binary alternation, make piezoelectric constant have half the time to have a rest, reduce the overtired of piezoelectric constant, greatly improve its operating life;
(2) piezoelectric ceramic is bonded in composite material both sides, not only can reduces piezoelectric constant internal stress, improve the pliability of blade, piezoelectric electro pectinid also can be made to reach the best amplitude of oscillation, ensure the optimum efficiency of fan;
(3) use blade as metallic amplifier, there is good elasticity, reach best fan effect;
(4) composite layer is carbon fiber layer or tinsel, and direct ground connection, use as fixed electrode, greatly improve its operating life;
(5) composite layer directly can extend and become blade, simplifies product structure, has good practicability, can produce good economic benefit and social effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first binary alternation piezoelectricity electric fan;
Fig. 2 is the structural representation of the second binary alternation piezoelectricity electric fan;
Fig. 3 is the structural representation of the third binary alternation piezoelectricity electric fan;
Fig. 4 is the structural representation of the 4th kind of binary alternation piezoelectricity electric fan.
Embodiment
Illustrate the utility model further below in conjunction with concrete accompanying drawing, this embodiment is implemented under premised on technical solutions of the utility model, should understand these modes and only be not used in restriction scope of the present utility model for illustration of the utility model.
The binary alternation piezoelectricity electric fan that life-span is long, comprises two panels piezoelectric ceramic 1, composite layer 2 and blade 3; 2 piezoelectric ceramics 1 stick on the corresponding up and down two sides of composite layer 2 respectively; One end of piezoelectric ceramic 1 is connected with blade 3, and the other end is connected with electrode.Wherein, composite material can be carbon fiber, and piezoelectric ceramic is high piezoelectric constant (d33 is greater than 750) piezoelectric constant.
As shown in Figure 1, piezoelectric ceramic polarity according to "+,-,-,+" arrangement, formed three-decker.The top of fan blade piezoelectric constant and below power V+ in turn, target (composite layer 2) ground connection (0 volt).The inverse piezoelectric effect of piezoelectric constant is utilized during work, when adding VDC V+ to top piezoelectric ceramic, the piezoelectric ceramic of below connects 0 volt or disconnection, under electric field action, by the inverse piezoelectric effect of piezoelectric constant, the piezoelectric constant sector-meeting of top extends deformation, and because the one end at piezoelectric ceramic two ends is fixed, the other end free end of piezoelectric ceramic will upward deflect.The voltage of the piezoelectric ceramic two end electrodes below opposite side is 0 volt or disconnection, be in off position, the piezoelectric ceramic of this side piezoelectric ceramic and top is bonded on same a slice composite material, and it also can deflect to identical direction with the piezoelectric ceramic of energising.When adding VDC V+ to the piezoelectric ceramic of below, the piezoelectric ceramic of top connects 0 volt or disconnection, and fan blade deflection direction is contrary, deflects down.Now the piezoelectric constant plate electrode both end voltage of top is 0 volt, is in off position, and the ceramic plate of following below down deflects.The conversion rate that the both sides piezoelectric ceramic adjusting piezoelectricity electric fan is energized respectively, can control blade deflection speed; Control power supply voltage size, the amplitude of blade deflection can be controlled.Reach best fan effect, Selective Pressure electroceramic chip size size and blade (metallic amplifier) size combine, and select the conversion frequency of driving power consistent with self resonant frequency of piezoelectricity electric fan, and the effect of fan is also best.
As shown in Figure 2, piezoelectric ceramic polarity according to "-,+,+,-" arrangement, formed three-decker.The top of fan blade piezoelectric constant and below be ground connection or disconnection in turn, and target meets V+.The inverse piezoelectric effect of piezoelectric constant is utilized during work, when giving top piezoelectric ceramic ground connection (0 volt), the piezoelectric ceramic wiring of below disconnects, under electric field action, by the inverse piezoelectric effect of piezoelectric constant, the piezoelectric constant sector-meeting of top extends deformation, and because the one end at piezoelectric ceramic two ends is fixed, the other end free end of piezoelectric ceramic will upward deflect.The piezoelectric ceramic two end electrodes open circuit of below, be in off position, the piezoelectric ceramic of this side piezoelectric ceramic and top is bonded on same a slice composite material, and it also can deflect to identical direction with the piezoelectric ceramic of energising.When giving piezoelectric constant ground connection (0 volt) of below, the piezoelectric ceramic wiring of top disconnects, and fan blade deflection direction is contrary, deflects down.Now the piezoelectric constant plate electrode two ends of top are open circuits, are in off position, and the ceramic plate of following below down deflects.
As shown in Figure 3, piezoelectric ceramic polarity according to "-,+,+,-" arrangement, formed three-decker.The top of fan blade piezoelectric constant and below ground connection or meet V+ in turn, target meets V+.The inverse piezoelectric effect of piezoelectric constant is utilized during work, when giving top piezoelectric ceramic ground connection (0 volt), the piezoelectric ceramic of below meets V+, under electric field action, by the inverse piezoelectric effect of piezoelectric constant, the piezoelectric constant sector-meeting of top extends deformation, and because the one end at piezoelectric ceramic two ends is fixed, the other end free end of piezoelectric ceramic will upward deflect.The piezoelectric ceramic two end electrodes equipotential of below, be in off position, the piezoelectric ceramic of this side piezoelectric ceramic and top is bonded on same a slice composite material, and it also can deflect to identical direction with the piezoelectric ceramic of energising.When giving piezoelectric constant ground connection (0 volt) of below, the piezoelectric ceramic wiring of top meets V+, and fan blade deflection direction is contrary, deflects down.Now the piezoelectric constant plate electrode two ends equipotential of top, is in off position, and the ceramic plate of following below down deflects.
Binary alternation piezoelectricity electric fan of the present invention, adopts binary alternation, makes piezoelectric ceramic have half the time to have a rest, and reduces the overtired of piezoelectric ceramic, greatly improves its operating life; Piezoelectric ceramic is bonded in composite material both sides, not only can reduces piezoelectric constant internal stress, improve the pliability of blade, piezoelectric electro pectinid also can be made to reach the best amplitude of oscillation, ensure the optimum efficiency of fan; Use tinsel as metallic amplifier, its material selection high duty alloy material, has good elasticity, reaches best fan effect.
In addition, adopt piezoelectric ceramic arrangement mode and the driving mode of Fig. 1, due to target ground connection, not charged, can directly use the composite material of conduction (can be carbon fiber) or tinsel to do mesosphere, and blade amplification is played in extension.As shown in Figure 4, the link of other bonded metal blade is decreased.
Claims (9)
1. the binary alternation piezoelectricity electric fan that the life-span is long, comprises 2 piezoelectric ceramics (1), composite layer (2) and blade (3); It is characterized in that: 2 described piezoelectric ceramics (1) according to piezoelectric constant polarity for+,-,-,+mode sticks on the corresponding up and down two sides of composite layer (2) respectively, described piezoelectric ceramic (1) is connected with power supply, composite layer (2) ground connection.
2. the binary alternation piezoelectricity electric fan that the life-span according to claim 1 is long, is characterized in that: described piezoelectric ceramic (1) is piezoelectric crystal d
33be greater than the piezoelectric constant of 750.
3. the binary alternation piezoelectricity electric fan that the life-span according to claim 1 is long, is characterized in that: described composite layer (2) is carbon fiber layer or tinsel.
4. the binary alternation piezoelectricity electric fan that the life-span according to claim 1 is long, is characterized in that: described blade (3) is bonded in the free end of piezoelectric constant (1).
5. the binary alternation piezoelectricity electric fan that the life-span according to claim 1 or 3 is long, is characterized in that: described composite layer (2) stretches out from piezoelectric ceramic (1) top, forms blade (3).
6. the binary alternation piezoelectricity electric fan that the life-span is long, comprises 2 piezoelectric ceramics (1), composite layer (2) and blade (3); It is characterized in that: 2 described piezoelectric ceramics (1) according to piezoelectric constant polarity for-,+,+,-mode sticks on the corresponding up and down two sides of composite layer (2) respectively, described piezoelectric ceramic (1) is connected with power supply, and composite layer (2) meets V+.
7. the binary alternation piezoelectricity electric fan that the life-span according to claim 6 is long, is characterized in that: described piezoelectric ceramic (1) is piezoelectric crystal d
33be greater than the piezoelectric constant of 750.
8. the binary alternation piezoelectricity electric fan that the life-span according to claim 6 is long, is characterized in that: described composite layer (2) is carbon fiber layer or tinsel.
9. the binary alternation piezoelectricity electric fan that the life-span according to claim 6 is long, is characterized in that: described blade (3) is bonded in the free end of piezoelectric constant (1).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392780A (en) * | 2020-10-09 | 2021-02-23 | 杨杰 | Piezoelectric fan structure capable of blowing air to periphery and driving method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392780A (en) * | 2020-10-09 | 2021-02-23 | 杨杰 | Piezoelectric fan structure capable of blowing air to periphery and driving method |
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