CN107840096A - The micro stable transport device of micro-nano stickiness powder and method - Google Patents
The micro stable transport device of micro-nano stickiness powder and method Download PDFInfo
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- CN107840096A CN107840096A CN201710975749.1A CN201710975749A CN107840096A CN 107840096 A CN107840096 A CN 107840096A CN 201710975749 A CN201710975749 A CN 201710975749A CN 107840096 A CN107840096 A CN 107840096A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G27/00—Jigging conveyors
- B65G27/10—Applications of devices for generating or transmitting jigging movements
- B65G27/16—Applications of devices for generating or transmitting jigging movements of vibrators, i.e. devices for producing movements of high frequency and small amplitude
Abstract
The invention discloses a kind of micro-nano micro stable transport device of stickiness powder, including impulse inertia force driving device, ultrasonic standing wave field generating means, micro-nozzle and microscope camera system, the impulse inertia force driving device includes frame, stacking-type piezoelectric ceramic actuator and piezoelectric drive signal source, ultrasonic standing wave field generating means includes ultrasonic-frequency power supply, ultrasonic transducer, becomes bat bar harmony wave reflection end, and the impulse inertia force driving device produces pulseintertia forces inside powder and powder is moved along micro-nozzle axis to jet expansion；Ultrasonic standing wave field generating means produces stable ultrasonic standing wave field at sound source harmony wave reflection end and micro-nozzle exit portion and its internal powder is placed in the node location of stationary field, micro-nozzle outlet port powder is in suspended state in the presence of acoustic radiation force, and departs from its intensive state powder in top and micro-nozzle inwall.This invention removes clogging of the powder in micro-nozzle, has the advantages that course of conveying is stable, precision is high.
Description
Technical field
The present invention relates to a kind of micro stable transport device of micro-nano stickiness powder and method.
Background technology
The micro conveying of the high-accuracy stable of micro-nano-scale powder be 3 D-printing and efficient bulk drug (HPAPI) research and
The key technology in the fields such as preparation.In terms of a large amount of powder conveyings, study more has Geldart-D particle, carrier gas type coaxially defeated at present
Send and be only applicable to the macroscopical defeated of a large amount of powders with a variety of powder transport methods such as ultrasonic vibration powder feeding, strength powder feeding and coaxial powder-feeding
Send, it is difficult to realize below 100mg/s micro conveying.The micro dust feeder of ultrasonic vibration is shaken using high frequency machinery caused by ultrasound
Dynamic (usual tens kHz) makes powder be flowed out from capillary nozzle.However, because the powder of micro-nano-scale is in course of conveying
The frictional force between larger stickiness power and powder and capillary tube inner wall between particle be present, powder compactness in micro- course of conveying increases
Greatly, plug nozzle, therefore course of conveying is unstable, delivery precision is difficult control.
The content of the invention
The problem to be solved in the present invention is to provide a kind of micro stable transport device of micro-nano stickiness powder and method.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
The micro-nano micro stable transport device of stickiness powder, including impulse inertia force driving device, ultrasonic standing wave field occur
Device, micro-nozzle and microscope camera system, the impulse inertia force driving device include frame, stacking-type piezoelectric ceramic actuator
With piezoelectric drive signal source, it is anti-that ultrasonic standing wave field generating means includes ultrasonic-frequency power supply, ultrasonic transducer, change bat bar and sound wave
Penetrate end, the impulse inertia force driving device produces pulseintertia forces inside powder and makes powder along micro-nozzle axis to nozzle
Exit movement；Ultrasonic standing wave field generating means produces stable ultrasonic standing wave field at sound source harmony wave reflection end and goes out micro-nozzle
Oral area point and its internal powder are placed in the node location of stationary field, and micro-nozzle outlet port powder is located in the presence of acoustic radiation force
Depart from suspended state, and with its intensive state powder in top and micro-nozzle inwall.
The stacking-type piezoelectric ceramic actuator upper surface is fixedly connected by connector A with the frame.
The stacking-type piezoelectric ceramic actuator lower surface is fixedly connected by connector B with the micro-nozzle.
The piezoelectric drive signal source voltage of the impulse inertia force driving device is adjustable in the range of 0~120V, and frequency is 1
~256Hz is adjustable, and signal waveform is square wave, triangular wave or 1/4 cycle Sine wave.
The change bat bar left side harmony wave reflection transverse plane of ultrasonic standing wave field generating means is parallel, and both distances are
The integral multiple of source emission sound wave half-wavelength.
The micro-nozzle exit portion is located at ultrasonic standing wave field node, and micro-nozzle axis is vertical with Acoustic Wave Propagation direction.
The inner hole section of the micro-nozzle in the axial direction is descending to be gradually tapered up.
The micro-nozzle cross sectional shape is circular, square or triangle.
The micro-nozzle material is glass, metal and nonmetallic.
The micro stable carrying method of micro-nano stickiness powder, comprises the following steps：(1) loaded from the big end entrance of micro-nozzle micro-
Nanoscale powder；(2) apply pulseintertia forces along micro-nozzle axis direction, make powder small to micro-nozzle under inertia force effect
Bring out a mouthful impulse movement；(3) when powder is full of whole nozzle, exported in nozzle small end and apply ultrasonic standing wave field, powder is existed
Acoustic radiation force, pulseintertia forces and the lower conveying delivery nozzle of self gravitation synthesis disturbance.
This invention removes clogging of the powder in micro-nozzle, has the advantages that course of conveying is stable, precision is high.
Brief description of the drawings
The micro stable transport device basic structure schematic diagram of the micro-nano stickiness powders of Fig. 1
Fig. 2 pulseintertia forces drive lower powder along micro-nozzle axial-movement schematic diagram
Acoustic radiation force driving powder motion schematic diagram in Fig. 3 ultrasonic standing waves field
Embodiment
Embodiment 1：
As shown in figure 1, the micro-nano micro stable transport device of stickiness powder of the present embodiment drives including pulseintertia forces
Device 1~7, ultrasonic standing wave field generating means 9~12, taper micro-nozzle 8 and microscope camera system 13~14.It is micro- with ultrasonic vibration
Measure and compared to powder device, eliminate clogging of the powder in micro-nozzle, have the advantages that course of conveying is stable, precision is high.
Impulse inertia force driving device includes frame 1, stacking-type piezoelectric ceramic actuator 3, piezoelectric drive signal source 5, work(
Rate amplifier 5, A connectors 2 and B connectors 4 and fastening bolt 7 etc..The upper surface of stacking-type piezoelectric ceramic actuator 3 is connected by A
Fitting 2 is fixed with frame 1 to be connected.The lower surface of stacking-type piezoelectric ceramic actuator 3 is fixed by B connectors 4 and taper micro-nozzle 8 to be connected
Connect, ensure that the telescopic direction of stacking-type piezoelectric ceramic actuator 3 is consistent with the axis direction of taper micro-nozzle 8 in installation process.Pressure
The voltage of electric drive signal source 6 is adjustable in the range of 0~120V, frequency is adjustable in 1~256Hz, and signal waveform is square wave, triangular wave
Or 1/4 cycle Sine wave.By taking square wave as an example, when applying the square wave of certain frequency on stacking-type piezoelectric ceramic actuator 3,
Voltage signal is from 0 to U in (voltage magnitude) change procedure, and driver 3 is together with B connectors 4, taper micro-nozzle 8 and powder
Move downward；When voltage signal from U into 0 change procedure, driver 3 is together with B connectors 4 and taper micro-nozzle 8 along driver 3
(i.e. upwards move) is shunk together, powder will be along micro-nozzle axis to micro- spray under inertia force self gravitation effect in micro-nozzle 8
Mouth exit portion moves a segment distance, and voltage is bigger, and moving displacement is bigger.Under the effect of several pulseintertia forces, powder will
Full of whole taper micro-nozzle 8.Pulseintertia forces effect can frighten, and powder motion schematic diagram in micro-nozzle 8 is as shown in Figure 2.
Ultrasonic standing wave field generating means includes ultrasonic-frequency power supply 9, ultrasonic transducer 10, bat bar 11 and reflection end 12 etc..Become
The section of width bar 1 is parallel with the plane of reflection end 12, and distance between the two is the half of certain frequency wave length of sound.Taper micro-nozzle
Positioned at the section of ultrasonic transformer 1 and the plane point midway of reflection end 12, the i.e. node location of ultrasonic standing wave field.And taper micro-nozzle axis
It is vertical with Acoustic Wave Propagation direction.
Taper micro-nozzle 8 gradually tapers up along micro-nozzle axis direction nozzle cross-section is descending, and cross sectional shape is circular, side
Shape or triangle etc..
It will be transported as shown in figure 3, micro-nozzle 8 exports interior powder in the presence of the acoustic radiation force of ultrasonic standing wave field to node direction
Dynamic, the result of motion is：Multiple powders are macroscopically showing as suspended state, with its intensive state powder in top and micro-nozzle inwall
Depart from, the irregular strenuous exercise of high speed of powder is shown as on microcosmic.Final result is the powder of micro-nozzle exit portion
Body will transfer out micro-nozzle under the comprehensive disturbance of inertia force, acoustic radiation force and self gravitation.
Experiment shows, is by 71.0 μm alpha-lactose (model RespitoseSV003) stickiness powder of average equivalent particle diameter
Pumped (conveying) medium, when micro-nozzle exit inside diameter be 100 μm, the voltage magnitude 60V of stacking-type piezoelectric ceramic actuator 3, frequency 1Hz,
When the frequency 30kHz of ultrasonic transducer 10, power 300W, the average conveying capacity of powder is 0.4mg/s, relative standard deviation (RSD)
Less than 0.12, much smaller than existing ultrasonic vibration Powder Microfeeder.
Embodiment 2：
The present embodiment and the difference of embodiment 1 are：Sound source and the distance of reflection end are certain specific frequency sound wave half
2 times of wavelength and more than, micro-nozzle exit portion still needs to be placed on standing wave node, and caused different-effect is, under the same terms,
The micro- conveying capacity for making powder is declined slightly because acoustic radiation force reduces.Other structures and carrying method are with reference to embodiment 1
Embodiment 3：
A connectors 2 rotate to an angle along frame 1 makes micro-nozzle downwards in vertical direction with 0~45 ° of angle, also can be
Delivery precision and stability are improved to a certain extent.Other structures and carrying method are with reference to embodiment 1.
Claims (10)
1. the micro-nano micro stable transport device of stickiness powder, it is characterised in that：Stayed including impulse inertia force driving device, ultrasound
Wave field generating means, micro-nozzle and microscope camera system, the impulse inertia force driving device includes frame, stacking-type piezoelectricity is made pottery
Porcelain driver and piezoelectric drive signal source, ultrasonic standing wave field generating means include ultrasonic-frequency power supply, ultrasonic transducer, become bat bar
Harmony wave reflection end, the impulse inertia force driving device produce pulseintertia forces inside powder and make powder along micro-nozzle axle
Line moves to jet expansion；Ultrasonic standing wave field generating means produces stable ultrasonic standing wave field at sound source harmony wave reflection end and will
Micro-nozzle exit portion and its internal powder are placed in the node location of stationary field, and micro-nozzle outlet port powder is in acoustic radiation force
Effect is lower to be in suspended state, and departs from its intensive state powder in top and micro-nozzle inwall.
2. the micro-nano micro stable transport device of stickiness powder according to claim 1, it is characterised in that：The stacking-type
Piezoelectric ceramic actuator upper surface is fixedly connected by connector A with the frame.
3. the micro-nano micro stable transport device of stickiness powder according to claim 1, it is characterised in that：The stacking-type
Piezoelectric ceramic actuator lower surface is fixedly connected by connector B with the micro-nozzle.
4. the micro-nano micro stable transport device of stickiness powder according to claim 1, it is characterised in that：The pulse is used to
The piezoelectric drive signal source voltage of property force driving device is adjustable in the range of 0~120V, and frequency is adjustable in 1~256Hz, signal wave
Shape is square wave, triangular wave or 1/4 cycle Sine wave.
5. the micro-nano micro stable transport device of stickiness powder according to claim 1, it is characterised in that：The ultrasound is stayed
The change bat bar left side harmony wave reflection transverse plane of wave field generating means is parallel, and both distances are source emission sound wave half-wavelength
Integral multiple.
6. the micro-nano micro stable transport device of stickiness powder according to claim 1, it is characterised in that：The micro-nozzle
Exit portion is located at ultrasonic standing wave field node, and micro-nozzle axis is vertical with Acoustic Wave Propagation direction.
7. the micro-nano micro stable transport device of stickiness powder according to claim 1 or 6, it is characterised in that：It is described micro-
The inner hole section of nozzle in the axial direction is descending to be gradually tapered up.
8. the micro-nano micro stable transport device of stickiness powder according to claim 1 or 6, it is characterised in that：It is described micro-
Nozzle cross-section is shaped as circular, square or triangle.
9. the micro-nano micro stable transport device of stickiness powder according to claim 1 or 6, it is characterised in that：It is described micro-
Nozzle material is glass, metal and nonmetallic.
10. the micro stable carrying method of micro-nano stickiness powder, it is characterised in that：Comprise the following steps：(1) from the big end of micro-nozzle
Entry load micro-nano-scale powder；(2) apply pulseintertia forces along micro-nozzle axis direction, make powder under inertia force effect
Moved to micro-nozzle small end outlet pulses；(3) when powder is full of whole nozzle, exported in nozzle small end and apply ultrasonic standing wave
, powder is conveyed delivery nozzle under the synthesis disturbance of acoustic radiation force, pulseintertia forces and self gravitation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017106597166 | 2017-08-04 | ||
| CN201710659716 | 2017-08-04 |
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| CN107840096A true CN107840096A (en) | 2018-03-27 |
| CN107840096B CN107840096B (en) | 2019-12-31 |
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| CN201710975749.1A Active CN107840096B (en) | 2017-08-04 | 2017-10-19 | Micro-nano viscous powder micro-stable conveying device and method |
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Cited By (4)
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| CN110491364A (en) * | 2019-07-03 | 2019-11-22 | 广州声博士声学技术有限公司 | Multiaxial type ultrasonic levitation device and control method |
| CN112024876A (en) * | 2020-08-28 | 2020-12-04 | 河南理工大学 | 3D printing ultrasonic small-aperture uniform powder feeding method and device |
| CN112478787A (en) * | 2020-11-23 | 2021-03-12 | 江南大学 | Ultrasonic precise feeding device and method for micron-sized powder particles |
| CN115914784A (en) * | 2021-09-30 | 2023-04-04 | Oppo广东移动通信有限公司 | Driver, manufacturing method thereof, driving device, camera module and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112024876A (en) * | 2020-08-28 | 2020-12-04 | 河南理工大学 | 3D printing ultrasonic small-aperture uniform powder feeding method and device |
| CN112024876B (en) * | 2020-08-28 | 2022-05-24 | 河南理工大学 | 3D printing ultrasonic small-aperture uniform powder feeding method and device |
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| CN115914784A (en) * | 2021-09-30 | 2023-04-04 | Oppo广东移动通信有限公司 | Driver, manufacturing method thereof, driving device, camera module and electronic equipment |
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| CN107840096B (en) | 2019-12-31 |
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