CN104621082B - Standing wave resonant piezoelectric mist spraying device and method - Google Patents
Standing wave resonant piezoelectric mist spraying device and method Download PDFInfo
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- CN104621082B CN104621082B CN201510038508.5A CN201510038508A CN104621082B CN 104621082 B CN104621082 B CN 104621082B CN 201510038508 A CN201510038508 A CN 201510038508A CN 104621082 B CN104621082 B CN 104621082B
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- 238000005507 spraying Methods 0.000 title abstract description 12
- 239000003595 mist Substances 0.000 title abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 93
- 150000001875 compounds Chemical class 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 31
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
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- 229910052751 metal Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000889 atomisation Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
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Abstract
The invention discloses a standing wave resonant piezoelectric mist spraying device and method. The standing wave resonant piezoelectric mist spraying device comprises a drive power source, a composite piezoelectric vibrator, a container, an inlet one-way valve, an outlet one-way valve, a swirl nozzle, a swirl valve element and an outlet one-way valve base, wherein a standing wave resonant cavity is formed in the container, penetrates through one end face of the container and is sealed through the composite piezoelectric vibrator; the electrode face of the composite piezoelectric vibrator is connected with the drive power source through a lead; the other end face of the container is provided with a fluid outlet; the outlet one-way valve is arranged at the fluid outlet; a fluid inlet is formed in the outer side wall of the container; the inlet one-way valve is installed at the fluid inlet; the swirl nozzle and the container are detachably connected; the swirl valve element and the outlet one-way valve base are arranged in the swirl nozzle; the swirl valve element is provided with multiple spiral swirl through grooves; a swirl chamber is formed in the swirl nozzle. The standing wave resonant piezoelectric mist spraying device solves the problems that a traditional atomizing device is complex in structure, large in size and high in manufacturing cost.
Description
Technical field
The present invention relates to the technical field of equipment for plant protection, refer in particular to a kind of standing wave resonance piezoelectric atomizer equipment and its piezoelectricity
Spray method is it is adaptable to the equipment for plant protection industry relevant with prevention and control of plant diseases, pest control such as crops and fruit trees.
Background technology
The atomizing type being applied to equipment for plant protection at this stage mainly has two kinds, i.e. pressure atomization and centrifugal spraying.Pressure
Atomization is directly to be driven by external force or mechanical movement, so that liquid internal is produced high pressure and spray via the micro-spraying hole of definite shape
And rupture the in the air being atomized on surrounding.Pressure atomization is a kind of spraying of rough formula it is difficult to meet ultra low volume spray and biology
The requirement of optimum grain-diameter.Centrifugal spraying is to produce centrifugal force using the part of a high-speed rotation, so that liquid is nebulized sprinkling
Go out, have an advantage in that the droplet grain spectrum of generation is narrower than pressure atomization, fogdrop diameter is usually 10～50 μm, can meet ultra-low volume spray
Mist and the requirement of biological optimum grain-diameter.But up to 7000～14000 revs/min of the rotating speed of device high speed rotary part, processing essence
Degree has high demands, and needs good dynamic equilibrium performance, and high-speed rotary part also easily produces abrasion in addition.
In recent years, with the development of modern fine agricultural, development pesticide dosage is few, and fogdrop diameter is little, high adsorption capacity, ring
Border pollution is less and the simple spraying apparatus of structure, it has also become a developing direction of technique in using agriculture chemical.Wherein, using piezoresistive material
The high frequency ultrasound vibration that material produces, makes liquid disperse in the gas phase and forms the piezoelectricity atomization technique of fine mist to be more suitable for the modern times
Precision agriculture field.Its operation principle is the dither using piezoelectric, so that liquid is formed wavy fluid film and crush
Form tiny misty liquid droplets.But the sprayer unit of this structure often also needs to configure air pump, to produce high pressure draught
Spray droplet it is therefore desirable to extra energy ezpenditure and volume is larger, be also unfavorable for that so that droplet is formed more accurately unifies in addition
Volume size.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, provide a kind of standing wave resonance piezoelectric atomizer equipment and its pressure
Method of electrospraying, to solve the problems, such as that traditional atomising device structure is more complicated, volume is larger, cost is higher, thus reach raising
Energy efficiency, reduction volume, the effect of investment reduction.
For achieving the above object, its standing wave resonance piezoelectric atomizer equipment of technical scheme provided by the present invention, includes drive
Dynamic power supply, compound piezoelectric vibrator, container, inlet one-way valve, Outlet check valves, swirl nozzle, eddy flow valve element, Outlet check valves
Pedestal, wherein, is formed with the standing wave resonance chamber for storing liquid, one end of this standing wave resonance chamber insertion container in described container
Face, and using compound piezoelectric vibrator sealing, the end face of this compound piezoelectric vibrator and container are bonded together, its other end
Face, that is, electrode surface be connected with driving power supply by lead, driving power supply produce alternating electric field be carried in by lead compound
On the electrode surface of piezoelectric vibrator, the compound piezoelectric vibrator of excitation produces periodic transverse bending vibration, and utilizes compound pressure
The periodicity transverse bending vibration of electric tachometer indicator, the fluid making in standing wave resonance chamber is produced standing wave resonance；Described container another
End face offers the fluid issuing in connection standing wave resonance chamber, and is provided with Outlet check valves in this fluid outlet；Described appearance
The fluid intake in connection standing wave resonance chamber is offered on the lateral wall of device, and at this fluid intake, inlet one-way valve is installed；
The one end that described swirl nozzle and container have fluid issuing is detachably connected；Described eddy flow valve element and Outlet check valves pedestal
Sequentially it is sequentially placed in swirl nozzle, and between this eddy flow valve element and Outlet check valves pedestal, keep spacing；Described go out
Mouth check valve is loaded on Outlet check valves pedestal, and the fluid in standing wave resonance chamber can flow at eddy flow valve element through Outlet check valves；
The eddy flow groove that the confession fluid of a plurality of screw type enters is had on described eddy flow valve element；It is formed with eddy flow in described swirl nozzle
Room, this spin chamber connection eddy flow groove and jet expansion, between both.
Between described eddy flow valve element and Outlet check valves pedestal, holddown spring is installed.
The pitch angle alpha of described eddy flow groove is between 45 °～75 °.
Described spin chamber is in coniform, and its taper angle theta is between 30 °～60 °.
Described compound piezoelectric vibrator is formed using epoxy gluing with metal thin round plate by circular piezoelectric piece.
The notch shape of described eddy flow groove is semicircle
Described inlet one-way valve is umbrella valve.
Described swirl nozzle is connected with container threads.
The piezoelectric atomizer method of standing wave resonance piezoelectric atomizer equipment of the present invention is as follows:
First, make compound piezoelectric vibrator produce transverse bending vibration using driving power supply so that environmental liquids pass through into
Mouth check valve sucks in standing wave resonance chamber；Then as compound piezoelectric vibrator periodic reverse vibration so that standing wave resonance
Fluid in chamber produces compressional wave vibration, after fluid compressional wave forms stable oscillation stationary vibration in standing wave resonance chamber, incidence wave and back wave
A stationary field will be formed in chamber；According to the theory of wave propagation of fluid, when the length in standing wave resonance chamber is standing wave half-wavelength
During integral multiple, cavity fluid will produce standing wave resonance, so that the pressure of cavity fluid is strengthened；Finally, work as standing wave resonance
After Outlet check valves enter swirl nozzle, by the eddy flow groove of eddy flow valve element, fluid is spun up fluid in chamber
And flowing into spin chamber, the liquid of rotation is got rid of to eddy flow locular wall by centrifugal force and forms a hollow cone, and final liquid is become with continuous
Thin form of liquid film leaves from jet expansion, and is broken into atomized drop.
When compound piezoelectric vibrator outwards vibrates, the volume in standing wave resonance chamber increases, and in chamber, pressure reduces, environmental liquids
To be flowed in cavity by inlet one-way valve, now Outlet check valves are closed；
When compound piezoelectric vibrator is to internal vibration, the volume in standing wave resonance chamber reduces, and in chamber, pressure increases, and now exports
Check valve is opened, and inlet one-way valve is closed, and cavity fluid will flow into swirl nozzle by Outlet check valves；
Of reciprocating vibration with compound piezoelectric vibrator, cavity fluid will be made to produce compressional wave vibration, when fluid compressional wave exists
After forming stable oscillation stationary vibration in chamber, incidence wave and back wave form a stationary field in standing wave resonance chamber, and the ripple according to fluid passes
Broadcast theory, when the integral multiple that length l in standing wave resonance chamber is standing wave half-wavelength, cavity fluid will produce standing wave resonance, thus
The standing wave pressure of intracavity liquid is made to be strengthened；
According to theory of wave propagation, when vibration frequency is higher, if the fluid in cavity produces standing wave resonance, will make in chamber
Fluid pressure produces larger enhancing, and the expression formula of pressure change is
δ p=ρ cu (1)
In formula, ρ is fluid density, and c is fluid velocity of wave, and u is the flow velocity along direction of wave travel for the fluid；
The expression formula again having a velocity of wave c is
In formula, b is the bulk modulus of fluid, and standing wave resonance to be produced need to meet the relational expression of cavity length l and wavelength X
For
K=1,2 ...
In above formula, the expression formula of wavelength X is
In formula, f is the frequency of standing wave, and from above formula (1)-(4), the standing wave resonance frequency of cavity fluid is
Because the fluid oscillating in standing wave resonance chamber is to be caused by the vibration of compound piezoelectric vibrator, therefore compound piezoelectricity
The vibration frequency of oscillator should be identical with standing wave resonance frequency in formula (5), can try to achieve standing wave resonance chamber in conjunction with above-mentioned formula
Length l.
The present invention compared with prior art, has the advantage that and beneficial effect:
1st, the present invention adopts standing wave resonance cavity configuration, produces standing wave based on liquid humorous under the excitation of compound piezoelectric vibrator
The operation principle shaken, significantly strengthens the pressure of cavity fluid, thus significantly increasing energy conversion efficiency.
2nd, compared with existing high frequency piezo sprayer unit, the transverse curvature of the compound piezoelectric vibrator that the present invention uses is shaken
Dynamic frequency is relatively low, which accordingly reduces energy ezpenditure.
3, present invention uses swirl nozzle structure, make liquid crushing become atomized liquid using the centrifugal force of rotating liquid itself
Drip it is not necessary to use high-speed rotary part and external air pump, etch micro-spraying hole without at nozzle, enormously simplify and set
Standby structure, and reduce cost.
Brief description
Fig. 1 is the sectional arrangement drawing of standing wave resonance piezoelectric atomizer equipment of the present invention.
Fig. 2 is the exploded view of standing wave resonance piezoelectric atomizer equipment of the present invention.
Fig. 3 is the sectional view of compound piezoelectric vibrator.
Fig. 4 is the structural representation of swirl nozzle.
Fig. 5 is the swirl nozzle sectional view indicating spin chamber's taper angle theta.
Fig. 6 is the structural representation of eddy flow valve element.
Fig. 7 is the eddy flow groove schematic diagram indicating pitch angle alpha.
Fig. 8 a is that compound piezoelectric vibrator does one of bending vibation mode picture of transverse bending vibration.
Fig. 8 b is the two of the bending vibation mode picture that compound piezoelectric vibrator does transverse bending vibration.
Fig. 9 a forms one of schematic diagram of standing wave resonance for fluid in standing wave resonance chamber.
Fig. 9 b forms the two of the schematic diagram of standing wave resonance in standing wave resonance chamber for fluid.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
As shown in Figures 1 to 7, the standing wave resonance piezoelectric atomizer equipment described in the present embodiment, includes driving power supply 1, answers
Mould assembly piezoelectric vibrator 2, container 3, inlet one-way valve 4, Outlet check valves 5, swirl nozzle 6, eddy flow valve element 7, Outlet check valves base
Seat 8, wherein, is formed with the standing wave resonance chamber 301 for storing liquid, this standing wave resonance chamber 301 insertion container in described container 3
3 end face, and sealed using compound piezoelectric vibrator 2, described compound piezoelectric vibrator 2 is by circular piezoelectric piece 201 and gold
Belong to thin round plate 202 to form using epoxy gluing, the end face of this compound piezoelectric vibrator 2 and container 3 are bonded together, its
Other end, that is, electrode surface be connected with driving power supply 1 by two leads 11, driving power supply 1 produce alternating electric field pass through draw
Line 11 is carried on the electrode surface of compound piezoelectric vibrator 2, encourages compound piezoelectric vibrator 2 to produce periodic transverse curvature and shakes
Dynamic, as figures 8 a and 8 b show, and utilize the periodicity transverse bending vibration of compound piezoelectric vibrator 2, standing wave resonance will be made
Fluid in chamber 301 produces standing wave resonance.The other end center of described container 3 offers connection standing wave resonance chamber 301
One fluid issuing, and it is fitted with Outlet check valves 5 in this fluid outlet.Offer connection on the lateral wall of described container 3 to stay
One fluid intake in wave resonance chamber 301, this fluid intake is near the fluid issuing of container 3, and is provided with this fluid intake
Inlet one-way valve 4, and in the present embodiment, described inlet one-way valve 4 is specially umbrella valve.Described swirl nozzle 6 and container 3 are opened
There is the one end of fluid issuing threaded, described eddy flow valve element 7 and Outlet check valves pedestal 8 are sequentially sequentially placed into this
In swirl nozzle 6, and keep spacing between this eddy flow valve element 7 and Outlet check valves pedestal 8, this eddy flow valve element 7 and outlet are unidirectional
Be also equipped with holddown spring 10 between valve base seat 8, one end of this holddown spring 10 is inconsistent with eddy flow valve element 7, its other end with
Check valve pedestal 8 is inconsistent.Described Outlet check valves 5 are positioned at the corresponding installation position of Outlet check valves pedestal 8, and its outlet is passed through
Lead to this check valve pedestal 8 so that the fluid in standing wave resonance chamber 301 can flow at eddy flow valve element 7 through Outlet check valves 5.Described
The eddy flow groove 701 that the confession fluid of eight screw types enters is had on eddy flow valve element 7, the pitch angle alpha of described eddy flow groove 701 exists
Between 45 °～75 °, its notch shape is semicircle.It is formed with cone shape spin chamber 9, its taper angle theta in described swirl nozzle 6
Between 30 °～60 °, this spin chamber 9 connects eddy flow groove 701 and jet expansion 601, and is located between both.
It is below the piezoelectric atomizer method of the present embodiment above-mentioned standing wave resonance piezoelectric atomizer equipment, its concrete condition is as follows:
First, compound piezoelectric vibrator 2 is made to produce transverse bending vibration using driving power supply 1, when compound piezoelectric vibrator 2
When outwards vibrating, the volume in standing wave resonance chamber 301 increases, and in chamber, pressure reduces, and environmental liquids will be flowed into by inlet one-way valve 4
In cavity, now Outlet check valves 5 are closed.
When compound piezoelectric vibrator 2 is to internal vibration, the volume in standing wave resonance chamber 301 reduces, and in chamber, pressure increases, now
Outlet check valves 5 are opened, and inlet one-way valve 4 is closed, and cavity fluid will flow into swirl nozzle 6 by Outlet check valves 5.
Of reciprocating vibration with compound piezoelectric vibrator 2, cavity fluid will be made to produce compressional wave vibration, when fluid compressional wave exists
After forming stable oscillation stationary vibration in chamber, incidence wave and back wave will form a stationary field, according to fluid in standing wave resonance chamber 301
Theory of wave propagation, when the integral multiple that length l in standing wave resonance chamber 301 is standing wave half-wavelength, it is humorous that cavity fluid will produce standing wave
Shake, so that the standing wave pressure of intracavity liquid been significantly enhanced, as shown in figures 9 a and 9b.
According to theory of wave propagation, when vibration frequency is higher, if the fluid in cavity produces standing wave resonance, will make in chamber
Fluid pressure produces larger enhancing, and the expression formula of pressure change is
δ p=ρ cu (1)
In formula, ρ is fluid density, and c is fluid velocity of wave, and u is the flow velocity along direction of wave travel for the fluid；
The expression formula again having a velocity of wave c is
In formula, b is the bulk modulus of fluid, and standing wave resonance to be produced need to meet the relational expression of cavity length l and wavelength X
For
K=1,2 ...
In above formula, the expression formula of wavelength X is
In formula, f is the frequency of standing wave, and from above formula (1)-(4), the standing wave resonance frequency of cavity fluid is
Because the fluid oscillating in standing wave resonance chamber 301 is to be caused by the vibration of compound piezoelectric vibrator 2, therefore compound
The vibration frequency of piezoelectric vibrator should be identical with standing wave resonance frequency in formula (5), can try to achieve standing wave resonance in conjunction with above-mentioned formula
Length l in chamber is (by accurate length l calculating standing wave resonance chamber so that the fluid in resonator produces standing wave resonance, thus no
Need to be by other external equipments, you can significantly improve the pressure of cavity fluid).
After the fluid in standing wave resonance chamber 301 enters swirl nozzle 6 by Outlet check valves 5, by eddy flow valve element 7
Eddy flow groove 701, fluid is spun up and is flowed into spin chamber 9, and the liquid of rotation is got rid of to eddy flow locular wall and formed by centrifugal force
One hollow cone, final liquid is left from jet expansion 601 with constantly thinning form of liquid film, and is broken into atomized drop.
In sum, after using above scheme, the present invention is atomized with existing pressure atomization, centrifugal spraying and piezoelectricity
Compare etc. technology, due to the standing wave resonance that make use of cavity fluid vibration to produce, so that fluid pressure is been significantly enhanced, therefore right
Higher in the utilization ratio of energy.Further, since employing swirl nozzle structure, the centrifugal force using rotating liquid itself makes liquid
Body is broken into atomized drop it is no longer necessary to high-speed rotary part and extra air pump spray drop, and jet expansion is also no
Micro-spraying hole need to be etched, therefore whole equipment has simple, the cheap and non-maintaining advantage of structure, drastically increases life
Produce efficiency, reduces cost, be worthy to be popularized.
The examples of implementation of the above are only the preferred embodiments of the invention, not limit the enforcement model of the present invention with this
Enclose, therefore the change that all shapes according to the present invention, principle are made, all should cover within the scope of the present invention.
Claims (10)
1. a kind of standing wave resonance piezoelectric atomizer equipment it is characterised in that: include driving power supply (1), compound piezoelectric vibrator
(2), container (3), inlet one-way valve (4), Outlet check valves (5), swirl nozzle (6), eddy flow valve element (7), Outlet check valves base
Seat (8), wherein, is formed with the standing wave resonance chamber (301) for storing liquid, this standing wave resonance chamber (301) in described container (3)
The end face of insertion container (3), and using compound piezoelectric vibrator (2) sealing, the end face of this compound piezoelectric vibrator (2) with
Container (3) is bonded together, its other end, and that is, electrode surface is connected with driving power supply (1) by lead (11), driving power supply
(1) alternating electric field producing is carried on the electrode surface of compound piezoelectric vibrator (2) by lead (11), encourages compound piezoelectricity
Oscillator (2) produces periodic transverse bending vibration, and utilizes the periodicity transverse bending vibration of compound piezoelectric vibrator (2),
The fluid in standing wave resonance chamber (301) will be made to produce standing wave resonance；The other end of described container (3) offers connection standing wave
The fluid issuing of resonator (301), and in this fluid outlet, Outlet check valves (5) are installed；The lateral wall of described container (3)
On offer the fluid intake of connection standing wave resonance chamber (301), and inlet one-way valve (4) is installed at this fluid intake；Institute
State the one end that swirl nozzle (6) has fluid issuing with container (3) to be detachably connected；Described eddy flow valve element (7) and outlet are single
Sequentially it is sequentially placed in swirl nozzle (6) to valve base seat (8), and this eddy flow valve element (7) and Outlet check valves pedestal (8)
Between keep spacing；Described Outlet check valves (5) are loaded on the fluid on Outlet check valves pedestal (8), in standing wave resonance chamber (301)
Eddy flow valve element (7) place can be flow to through Outlet check valves (5)；The confession fluid having a plurality of screw type on described eddy flow valve element (7) enters
The eddy flow groove (701) entering；It is formed with spin chamber (9), this spin chamber (9) connect eddy flow groove in described swirl nozzle (6)
(701) and jet expansion (601), between both.
2. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described eddy flow valve element (7)
Holddown spring (10) is installed and Outlet check valves pedestal (8) between.
3. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described eddy flow groove
(701) pitch angle alpha is between 45 °～75 °.
4. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described spin chamber (9) is in
Coniform, its taper angle theta is between 30 °～60 °.
5. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described compound piezoelectricity shakes
Sub (2) are formed using epoxy gluing with metal thin round plate (202) by circular piezoelectric piece (201).
6. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 or 3 it is characterised in that: described eddy flow groove
(701) notch shape is semicircle.
7. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described inlet one-way valve
(4) it is umbrella valve.
8. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 1 it is characterised in that: described swirl nozzle (6)
Threaded with container (3).
9. standing wave resonance piezoelectric atomizer equipment described in a kind of claim 1 piezoelectric atomizer method it is characterised in that: first, profit
Compound piezoelectric vibrator is made to produce transverse bending vibration so that environmental liquids suck standing wave by inlet one-way valve with driving power supply
In resonator；Periodic reverse vibration then as compound piezoelectric vibrator is so that the fluid in standing wave resonance chamber produces and indulges
Ripple vibrates, and after fluid compressional wave forms stable oscillation stationary vibration in standing wave resonance chamber, incidence wave and back wave will form one in chamber
Stationary field；According to the theory of wave propagation of fluid, when the integral multiple that the length in standing wave resonance chamber is standing wave half-wavelength, cavity fluid
Standing wave resonance will be produced, so that the pressure of cavity fluid is strengthened；Finally, when the fluid in standing wave resonance chamber passes through outlet
After check valve enters swirl nozzle, by the eddy flow groove of eddy flow valve element, fluid is spun up and is flowed into spin chamber, rotation
Liquid is got rid of to eddy flow locular wall by centrifugal force and forms a hollow cone, and final liquid is gone out from nozzle with constantly thinning form of liquid film
Mouth leaves, and is broken into atomized drop.
10. a kind of standing wave resonance piezoelectric atomizer equipment according to claim 9 piezoelectric atomizer method it is characterised in that:
When compound piezoelectric vibrator outwards vibrates, the volume in standing wave resonance chamber increases, and in chamber, pressure reduces, and environmental liquids will lead to
Cross inlet one-way valve to flow in cavity, now Outlet check valves are closed；
When compound piezoelectric vibrator is to internal vibration, the volume in standing wave resonance chamber reduces, and in chamber, pressure increases, and now exports unidirectional
Valve is opened, and inlet one-way valve is closed, and cavity fluid will flow into swirl nozzle by Outlet check valves；
Of reciprocating vibration with compound piezoelectric vibrator, cavity fluid will be made to produce compressional wave vibration, when fluid compressional wave is in chamber
After forming stable oscillation stationary vibration, incidence wave and back wave form a stationary field in standing wave resonance chamber, and the ripple according to fluid propagates reason
By, when the integral multiple that length l in standing wave resonance chamber is standing wave half-wavelength, cavity fluid will produce standing wave resonance, so that chamber
The standing wave pressure of interior liquid is strengthened；
According to theory of wave propagation, when vibration frequency is higher, if the fluid in cavity produces standing wave resonance, cavity fluid will be made
Pressure produces larger enhancing, and the expression formula of pressure change is
δ p=ρ cu (1)
In formula, ρ is fluid density, and c is fluid velocity of wave, and u is the flow velocity along direction of wave travel for the fluid；
The expression formula again having a velocity of wave c is
In formula, b is the bulk modulus of fluid, standing wave resonance to be produced, and the relational expression that need to meet cavity length l with wavelength X is
K=1,2 ...
In above formula, the expression formula of wavelength X is
In formula, f is the frequency of standing wave, and from above formula (1)-(4), the standing wave resonance frequency of cavity fluid is
Because the fluid oscillating in standing wave resonance chamber is to be caused by the vibration of compound piezoelectric vibrator, therefore compound piezoelectric vibrator
Vibration frequency should be identical with standing wave resonance frequency in formula (5), the cavity in standing wave resonance chamber can be tried to achieve in conjunction with above-mentioned formula
Length l.
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| CN201510038508.5A CN104621082B (en) | 2015-01-26 | 2015-01-26 | Standing wave resonant piezoelectric mist spraying device and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204688A (en) * | 2006-12-18 | 2008-06-25 | 株式会社田村制作所 | Automizing device |
| CN102553767A (en) * | 2011-12-13 | 2012-07-11 | 南京航空航天大学 | Piezoelectric ceramic ultrasonic atomizing sheet |
| CN102784738A (en) * | 2012-07-06 | 2012-11-21 | 江苏大学 | Low-frequency ultrasonic atomizing spray nozzle with large atomization amount |
| WO2013100167A1 (en) * | 2011-12-29 | 2013-07-04 | Sumitomo Chemical Company Limited | Ultrasonic atomizing device and pest control method |
| CN104209222A (en) * | 2014-09-19 | 2014-12-17 | 江苏大学 | Bernoulli twisted-pair low-frequency ultrasonic triple atomizing spray nozzle |
| CN104209221A (en) * | 2014-09-19 | 2014-12-17 | 江苏大学 | Low-frequency bending vibration type secondary ultrasonic atomizer |
| CN104245151A (en) * | 2012-04-27 | 2014-12-24 | 住友化学株式会社 | Ultrasonic atomization device |
-
2015
- 2015-01-26 CN CN201510038508.5A patent/CN104621082B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204688A (en) * | 2006-12-18 | 2008-06-25 | 株式会社田村制作所 | Automizing device |
| CN102553767A (en) * | 2011-12-13 | 2012-07-11 | 南京航空航天大学 | Piezoelectric ceramic ultrasonic atomizing sheet |
| WO2013100167A1 (en) * | 2011-12-29 | 2013-07-04 | Sumitomo Chemical Company Limited | Ultrasonic atomizing device and pest control method |
| CN104245151A (en) * | 2012-04-27 | 2014-12-24 | 住友化学株式会社 | Ultrasonic atomization device |
| CN102784738A (en) * | 2012-07-06 | 2012-11-21 | 江苏大学 | Low-frequency ultrasonic atomizing spray nozzle with large atomization amount |
| CN104209222A (en) * | 2014-09-19 | 2014-12-17 | 江苏大学 | Bernoulli twisted-pair low-frequency ultrasonic triple atomizing spray nozzle |
| CN104209221A (en) * | 2014-09-19 | 2014-12-17 | 江苏大学 | Low-frequency bending vibration type secondary ultrasonic atomizer |
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