CN108580074A - A kind of method for generation and device of the single size droplet diameter of adjustable atomization - Google Patents
A kind of method for generation and device of the single size droplet diameter of adjustable atomization Download PDFInfo
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- CN108580074A CN108580074A CN201810269921.6A CN201810269921A CN108580074A CN 108580074 A CN108580074 A CN 108580074A CN 201810269921 A CN201810269921 A CN 201810269921A CN 108580074 A CN108580074 A CN 108580074A
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- Prior art keywords
- atomization
- capillary
- metal
- drop
- diameter
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
Abstract
The present invention discloses the method for generation and device of a kind of adjustable single size droplet diameter of atomization in electrostatic atomization field, liquid reserve tank is connected by conduit and is connected to metal capillary, flow control valve and flowmeter are housed on conduit, appliance stand includes upper and lower two pieces of parallel square plates, and metal capillary extend into nebulization region above appliance stand by the through-hole on upper square plate；It closely is cased with capillary tube holder outside metal capillary epimere, capillary tube holder is connect by conducting wire with HV generator；Metal capillary inside nebulization region is arranged right below lifting platform, and level puts a round metal copper coin at the upper surface middle of lifting platform, and round metal copper coin is connect with HV generator by conducting wire；The action characteristic that liquid surface tension is reduced with electrostatic force is distributed by adjusting voltage, flow, interpolar away from size and metal capillary specifications control atomization droplets diameter by the breakup of drop at fine drop, the single drop of the grain sizes atomization such as generation.
Description
Technical field
The present invention relates to electrostatic atomization field, the generating means of specifically a kind of adjustable single size droplet diameter of atomization and side
Method, the atomization list drop of the grain sizes such as generation.
Background technology
The size of voltage on metal capillary is applied to by change to obtain the process of the atomized drop of different-grain diameter to claim
For electrostatic atomization.The atomized drop of different-grain diameter is used in different engineering fields, mainly has inkjet printing, fuel oil injection, gathers
And dedusting and space propulsion etc..In different applications, atomization droplets diameter size will directly affect final make
Use effect.
A kind of droplet generator and its working method are disclosed in the document that China Patent No. is 201410236750.9, it will
Liquid forms drop at drop suspension water dropper, and the formation of drop is controlled using interior moving lever, is thrown away drop with outer moving lever,
It is finally reached the purpose of droplet formation；The droplet generator will appear at work variable-frequency governor and controllable peristaltic pump failure,
The situations such as long-time recoil of spring failure, and size droplet diameter is uncontrollable, complicated, maintenance difficult.China Patent No.
A kind of droplet generator is disclosed in 200580031119.4 document, is mainly converted by the modulation energy that voltage transistor generates
For the vibration of nozzle, to generate drop；Design inside the droplet generator is complicated, due to generating the period by spring assembly
It moves back and forth, long-time recoil of spring ability can reduce, and droplet generator inner flow passage is more narrow, in liquid flowing
Blocking is easy tod produce in the process, is unfavorable for the generation of drop, and the size droplet diameter generated is uncontrollable.China Patent No. is
A kind of droplet generator and microfluidic control system are disclosed in 201621173301.5 document, are set on internal phase fluid pipeline
There is the first contraction mouth, interphase fluid line is equipped with the second contraction mouth, and liquid flows in the duct, due to not cocurrent flow phase pipeline
In liquid interaction, will produce drop in pipeline exit；Its disadvantage mainly has：Size droplet diameter is uncontrollable, number of tubes
More, repair is complex, and the flow velocity of cocurrent flow phase pipeline, specification etc. be not more demanding, and processing is complex, is sent out in drop
Stream phase pipeline easy tos produce clogging during raw.
Invention content
The purpose of the invention is to obtain the controllable single atomized drop of scale, a kind of single drop grain of adjustable atomization is provided
The method for generation and device of diameter.
A kind of technical solution that the generating means of the adjustable single size droplet diameter of atomization uses of the present invention is as follows：With filling mist
Change the liquid reserve tank of liquid, liquid reserve tank is connected and is connected to by conduit metal capillary, flow control valve and stream are housed on conduit
Gauge, appliance stand include parallel two pieces of square plates up and down, are nebulization region between two pieces of square plates, and metal capillary is from dress
It sets and nebulization region is extend by the through-hole on upper square plate above holder；Closely it is cased with capillary outside metal capillary epimere
Holder, capillary tube holder are connect by conducting wire with HV generator；Metal capillary inside nebulization region just under
Side is equipped with lifting platform, and level puts a round metal copper coin at the upper surface middle of lifting platform, and round metal copper coin and high pressure are quiet
Electric generator is connected by conducting wire.
Further, between 0.10mm-0.55mm, the outer diameter of round metal copper coin is more than or waits the internal diameter of metal capillary
Interpolar between 150mm, round metal copper coin upper surface and metal capillary lower end is away between 20mm-80mm.
The particle size adjustment method of the generating means is the technical solution adopted is that include the following steps：
A, flow control valve is adjusted, it is constant flow rate to make atomized liquid flow, HV generator is opened, in nebulization region
The single droplet of interior generation；
B, the electrostatic potential for changing HV generator, obtains different electric field strengths, obtains the atomization list liquid of different-grain diameter
Drop；
C, the upper-lower height of lifting platform is adjusted, changes the distance between metal capillary and metal copper plate, obtains different electric fields
Intensity obtains the atomization list drop of different-grain diameter；
D, the internal diameter for changing metal capillary, obtains single drop of different atomizing particle sizes.
The present invention has the following advantages that after using above-mentioned technical proposal：
1. the present invention is a kind of device by electrostatic by liquid crushing at equal grain sizes fine drop, liquid is reduced with electrostatic force
The action characteristic of surface tension, by the breakup of drop at fine drop, by adjusting voltage, flow, interpolar away from size and metal
Capillary dimension etc. controls atomization droplets diameter distribution, final to obtain drop-wise spray patterns, the single drop of the grain sizes atomization such as generation.
2, the present invention, by controlling the voltage of HV generator, changes space electrical field, most under constant flow rate
Change eventually and act on electric field force on drop, under the action of different electric field forces, the atomized drop of different-grain diameter can be obtained；
2. the present invention is changed the distance between metal capillary and round metal copper coin, is obtained not by the height of adjusting lifting platform
Same electric field strength, the final particle diameter distribution for changing atomized drop.
3. the present invention to the control of flow and voltage by can be achieved to accurately control size droplet diameter.
4. the present invention can obtain the atomization of different-grain diameter by changing metal capillary mouth specification or changing drop initial particle
Single drop.
5. the present invention is by controlling electrostatic Bond numbersB EThe control that electrostatic atomization pattern may be implemented makes electrostatic atomization mould
Formula controls under drop-wise pattern, obtains the single drop of atomization.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the generating means of the adjustable single size droplet diameter of atomization of the present invention；
In Fig. 1：1. liquid reserve tank；2. flow control valve；3. flowmeter；4. conduit；5. capillary tube holder；6. metal capillary；
7. HV generator；8. lifting platform；9. round metal copper coin；10. appliance stand；11. metal cap；
Fig. 2 be interpolar away fromL=30.0mm,d i=0.3mm, absolute ethyl alcohol is under different flow as the variation of voltage is atomized single drop
Grain size distribution；
Fig. 3 be interpolar away fromL=30.0mm,d i=0.3mm, deionized water is under different flow as the variation of voltage is atomized single drop
Grain size distribution；
Fig. 4 isq V =0.10ml/min,d i=0.3mm,LThe single size droplet diameter standard of absolute ethyl alcohol atomization under=30.0mm different voltages
Variogram.
Specific implementation mode
Referring to Fig. 1, a kind of generating means of the adjustable single size droplet diameter of atomization of the present invention has a liquid reserve tank 1, in liquid reserve tank 1
It is loaded with atomized liquid.Liquid reserve tank 1 connects by conduit 4 and is connected to metal capillary 6, and flow control valve is installed on conduit 4
Door 2 and flowmeter 3.It is tightly fastened outside the epimere of metal capillary 6 and is cased with capillary tube holder 5, capillary tube holder 5 is by strong
Property glue is fixed on appliance stand 10, to keep metal capillary 6 fixed.Capillary tube holder 5 passes through conducting wire and high pressure
Electrostatic generator 7 connects.Appliance stand 10 is by parallel two pieces of square plates up and down and be connected between two pieces of square plates four
Vertical solid cylindrical composition, the four corners of two pieces of square plates are connected with vertical solid cylindrical.Between two pieces of square plates
There are enough distances up and down, which is exactly nebulization region.It is provided in the upper square plate middle of appliance stand 10 logical
Hole, metal capillary 6 extend into nebulization region above appliance stand 10 by the through-hole on upper square plate.Metal capillary 6
It is perpendicular with upper square plate.It is fixedly connected with a metal cap 11 in the upper square plate lower surface of appliance stand 10, metal cap 11 is logical
It crosses epistasis glue to be fixed on appliance stand 10, metal cap 11 can completely cut off upper layer electric field（Conducting wire etc.）To nebulization region internal electric field
It influences.HV generator 7 is located at the outside of appliance stand 10.
Inside nebulization region, it is arranged right below lifting platform 8 in metal capillary 6, the bottom of lifting platform 8 is placed on dress
It sets at the middle of lower square plate of holder 10, level puts a round metal copper coin at the upper surface middle of lifting platform 8
9, round metal copper coin 9 is connect with HV generator 7 by conducting wire, and is connect with the earth, ensures that it is zero potential.Metal
The central shaft of circle copper coin 9 is conllinear with the central shaft of metal capillary 6, is located at the underface of metal capillary 6.
The internal diameter of metal capillary 6d i Range is between 0.10mm-0.55mm.Metal cap 11 is cylindrical shape, outer diameterdGreatly
In or equal to 150mm.Round metal copper coin 9 is discoid, and outer diameter D is greater than or equal to 150mm.The upper surface of round metal copper coin 9
Vertical range between the lower end of metal capillary 6 be interpolar away fromL, by adjust lifting platform 8 height, be adjusted interpolar away fromLRange between 20mm-80mm, to change atomization space electric fieldE 0Size.
The voltage of HV generator 7 is necessarily less thanV 0, or ensure electrostatic Bond numbersB EIt is less thanB EC, it is necessary to assure hair
Tubule electrostatic atomization pattern is drop-wise pattern；B EIt is a kind of dimensionless group of characterization electrostatic field intensity size,B ECBe just not
The critical value of electrostatic Bond numerical value when generating drop-wise pattern.
In order to ensure that electrostatic atomization pattern is drop-wise pattern, by the voltage for adjusting HV generator 7V 0, interpolar away fromLAnd capillary outer diameterd OTo realize.Electrostatic Bond numbers are to discriminate between the parameter of spray patterns, the corresponding maximum electrostatic of drop-wise pattern
Bond numbersB EForB EC, about 0.20.Ensure during adjustment parameterB ELess than 0.20：
, and,
Wherein,Indicate Logarithmic calculation formula,ε 0 For permittivity of vacuum,LFor the distance between metal capillary and pole plate,E
It is applied to field strength caused by the voltage on metal capillary 6,VTo apply voltage,γFor surface tension of liquid,d OFor metal kernel
Tubule outer diameter.
When HV generator works, the space between metal capillary and round metal copper coin can form electric field.
Liquid enters capillary by conduit by flow control valve, flowmeter.The flow of liquid is adjusted by flow control valve
Section, the uninterrupted of capillary control some constant flow rate between 0.01ml/min-0.30ml/min.In constant flow
Under, under the action of electric field force, the dropping frequency of drop can increased with the raising of voltage, and the grain size of drop will subtract
It is small, it is final to realize that the single size droplet diameter of atomization is adjustable.
When generating means works, flow control valve 2 is adjusted, the atomized liquid flow in liquid reserve tank 1 is made to control
Constant flow rate between 0.01ml/min-0.30ml/min, liquid is entered by conduit 4 in metal capillary 6, in metal kernel
It is crushed at 6 lower port of tubule and generates atomized drop.HV generator 7 is opened, the voltage of HV generator 7 is adjusted,
It will produce space electric field in nebulization region between metal capillary 6 and round metal copper coin 9, generate single droplet.Due to liquid
Flow it is constant, under the action of electric field force, drop fall separation frequency have promotions, at this time atomization list drop grain size
It can reduce, it is final to realize to the adjustable purpose of atomization droplets diameter.Therefore, flow control valve 2 is adjusted to adjust capillary 6
Flow can obtain the drop of different dropping frequencies and different-grain diameter.
By the electrostatic potential for changing HV generator 7V 0, different electric field strengths can be obtainedE 0.Different
Electric field strengthE 0Under the action of, the atomization list drop of different-grain diameter can be obtained；The mist of different dropping frequencies can be obtained simultaneously
Change single drop.Adjusting electrostatic potentialV 0During, ensure electrostatic Bond numbersB ELess than 0.20, to ensure that spray patterns maintain
In drop-wise pattern.
The upper-lower height of lifting platform 8 is adjusted, changes the distance between metal capillary 6 and metal copper plate 9, obtains different
Electric field strengthE 0；Obtain different size of drop；The drop of different dropping frequencies can be obtained simultaneously.
Change the specification of metal capillary 6, that is, changes the internal diameter of metal capillary 6 to change the initial grain of drop generation
Diameter obtains single drop of different atomizing particle sizes, realizes the purpose controllable to atomization droplets diameter.
Referring to Fig. 2, be generating means of the present invention interpolar away fromL=30.0mm, the internal diameter of metal capillary 6d i=0.3mm, storage
What is filled in liquid case 1 is absolute ethyl alcohol, adjusts flow control valve 2, makes absolute ethyl alcohol under different flow with the variation of voltage
The distribution map figure of the single size droplet diameter of atomization.Under prescribed conditions, the uninterrupted of absolute ethyl alcohol is respectivelyq V=0.03ml/min、q V
=0.07ml/min、q V=0.10ml/min、q V=0.30ml/min obtains the grain size of the single drop of absolute ethyl alcohol atomization under different voltages
Distribution.
Referring to Fig. 3, be generating means of the present invention interpolar away fromL=30.0mm, the internal diameter of metal capillary 6d i=0.3mm, storage
What is filled in liquid case 1 is deionized water, and deionized water is under different flow with the distribution of the single size droplet diameter of variation atomization of voltage
Figure.Under prescribed conditions, de-ionized water flow rate size is respectivelyq V=0.03ml/min、q V=0.05ml/min、q V=0.07ml/
min、q V=0.10ml/min obtains the particle diameter distribution of the single drop of different voltages deionised water atomization.
Referring to Fig. 4, what is filled in the liquid reserve tank 1 for being generating means of the present invention is absolute ethyl alcohol, absolute ethyl alcohol flowq V=
0.10ml/min, the internal diameter of metal capillary 6d i=0.3mm, interpolar away fromL=30.0mm, the absolute ethyl alcohol drop under different voltages
Size grade scale variogram.The grain size for choosing 30 periods atomization single drop is calculated, and it is single to obtain atomization by curve in Fig. 4
The grain size departure degree of drop is smaller, meets the requirements.Wherein standard variance solution formula is：
,x 1....x nN is arrived for the 1st time under same traffic and voltage
The atomization list size droplet diameter of secondary acquisition,nTo choose the number for being atomized single size droplet diameter,σFor the single drop standard deviation square value of atomization.
Claims (6)
1. a kind of generating means of the single size droplet diameter of adjustable atomization, has the liquid reserve tank for filling atomized liquid（1）, liquid reserve tank
（1）Pass through conduit（4）Connection and connection metal capillary（6）, conduit（4）It is upper that flow control valve is housed（2）And flowmeter
（3）, it is characterized in that：Appliance stand（10）It is nebulization region between two pieces of square plates including two pieces of parallel up and down square plates, gold
Belong to capillary（6）From appliance stand（10）Top extend into nebulization region by the through-hole on upper square plate；Metal capillary（6）
Closely it is cased with capillary tube holder outside epimere（5）, capillary tube holder（5）Pass through conducting wire and HV generator（7）Connection；
Metal capillary inside nebulization region（6）Be arranged right below lifting platform（8）, lifting platform（8）Upper surface middle at water
Horizontal puts a round metal copper coin（9）, round metal copper coin（9）With HV generator（7）It is connected by conducting wire.
2. a kind of generating means of adjustable single size droplet diameter of atomization according to claim 1, it is characterized in that：Metal capillary
Pipe（6）Internal diameter between 0.10mm-0.55mm, round metal copper coin（9）Outer diameter be greater than or equal to 150mm, round metal copper coin
（9）Upper surface and metal capillary（6）Interpolar between lower end is away between 20mm-80mm.
3. a kind of generating means of adjustable single size droplet diameter of atomization according to claim 2, it is characterized in that：Metal capillary
Pipe（6）With appliance stand（10）Upper square plate it is perpendicular, in appliance stand（10）Upper square plate lower surface be fixedly connected with one
A metal cap（11）, metal cap（11）Outer diameter be greater than or equal to 150mm.
4. the atomization list size droplet diameter adjusting method of a kind of generating means as described in claim 1, it is characterized in that including following
Step：
A, flow control valve is adjusted（2）, it is constant flow rate to make atomized liquid flow, opens HV generator（7）, in mist
Change and generates single droplet in region；
B, change HV generator（7）Electrostatic potential, obtain different electric field strengths, obtain the atomization list of different-grain diameter
Drop；
C, lifting platform is adjusted（8）Upper-lower height, change metal capillary（6）With metal copper plate（9）The distance between, it obtains not
Same electric field strength, obtains the atomization list drop of different-grain diameter；
D, change metal capillary（6）Internal diameter, obtain single drop of different atomizing particle sizes.
5. the single size droplet diameter adjusting method of atomization according to claim 4, it is characterized in that：In step B, in electrostatic potential mistake
Cheng Zhong ensures that electrostatic Bond numbers are less than 0.20.
6. the single size droplet diameter adjusting method of atomization according to claim 4, it is characterized in that：In step A, atomized liquid flow
Size controls between 0.01ml/min-0.30ml/min.
Priority Applications (1)
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| CN201810269921.6A CN108580074A (en) | 2018-03-29 | 2018-03-29 | A kind of method for generation and device of the single size droplet diameter of adjustable atomization |
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| CN201810269921.6A CN108580074A (en) | 2018-03-29 | 2018-03-29 | A kind of method for generation and device of the single size droplet diameter of adjustable atomization |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025427A (en) * | 2019-04-15 | 2019-07-19 | 江苏师范大学 | Eye drip medicine device |
| CN110404474A (en) * | 2019-07-05 | 2019-11-05 | 金华职业技术学院 | A kind of preparation method of spherical liquid particle |
| CN111569750A (en) * | 2020-04-22 | 2020-08-25 | 江苏大学 | Liquid drop micro-mixing evaporation regulation and control device based on electric field induction |
| CN112604833A (en) * | 2020-12-14 | 2021-04-06 | 哈尔滨工业大学 | Electric spray liquid drop radiation heat dissipation device driven by electric conduction pump |
| US11399657B2 (en) | 2017-08-09 | 2022-08-02 | Sharkninja Operating Llc | Cooking device and components thereof |
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| US11399657B2 (en) | 2017-08-09 | 2022-08-02 | Sharkninja Operating Llc | Cooking device and components thereof |
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