CN103286031B - High-frequency and high-speed micron-sized droplet generating device - Google Patents
High-frequency and high-speed micron-sized droplet generating device Download PDFInfo
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- CN103286031B CN103286031B CN201310182453.6A CN201310182453A CN103286031B CN 103286031 B CN103286031 B CN 103286031B CN 201310182453 A CN201310182453 A CN 201310182453A CN 103286031 B CN103286031 B CN 103286031B
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Abstract
The invention discloses a droplet generating device which is used for changing static liquid materials into droplets and then ejecting the droplets at a certain speed. The droplet generating device comprises a liquid storage tank (9) and a cavity. The liquid storage tank (9) is used for storing the liquid materials (8), the bottom of the liquid storage tank (9) is communicated with at least one feeding guide tube (10), a turning wheel (11) is arranged in the center of the cavity, and the central axis of the turning wheel (11) is parallel to the horizontal plane; the feeding guide tubes (10) penetrate the upper portion of the cavity and reach space where the turning wheel (11) is located, so that the liquid materials (8) in the liquid storage tank (9) can drop on a side surface of the turning wheel (11) via the feeding guide tubes (10), and the liquid materials which flow into the turning wheel can be accelerated by the turning wheel (11) and then can be thrown out in a droplet form from a tangential direction of the side surface of the turning wheel (11). The droplet generating device has the advantages that micron-sized droplets with certain initial speed can be generated by the droplet generating device, and the ejection frequency and the diameters of the micron-sized droplets are stable and adjustable.
Description
Technical field
The present invention relates to a kind of micron order dropproducing devices exceeding radio frequency rate, high initial speed degree, dimensionally stable, belong to instrument, instrument field.
Background technology
Along with the raising of scientific and technological level, increasing field needs to provide micron order diameter, dimensionally stable, outgoing frequency higher and has the dropproducing devices of certain initial velocity, such as grenz ray, extreme ultraviolet luminescence, inkjet printing etc.Such demand promotion correlative study continues to bring out.
The United States Patent (USP) that such as publication number is US4723262B1, denomination of invention is " APPARATUS FORPRODUCTION SOFT X-RAYS USING A HIGH ENERGY LASER BEAM ", utilize fluid pressure differential to be extruded by conduit by the liquid in liquid reserve tank, form stream of liquid droplets.This apparatus structure is simple, but effectively cannot control liquid-drop diameter, drop outgoing frequency and exit velocities.
In control liquid-drop diameter, publication number is US2007257970A1, denomination of invention is first carry out current limliting by conduit to liquid in the U.S. Patent Publication description of " DROPLETS GENERATOR ", fluid separation applications is made to become each droplet, finally by nozzle outgoing by piezo-electric crystal vibration again.Although liquid-drop diameter effectively can be controlled by the vibration frequency of piezo-electric crystal, the drop outgoing initial velocity that the method generates is lower, cannot be applied to and have certain requirements device to drop initial velocity.
In improvement initial velocity, publication number is CN102210997A, name is called that the Chinese patent prospectus of " single-particle high-speed drop generator " proposes the drop generating device shown in Fig. 1.As shown in Figure 1, liquid reserve tank 1 forms the liquid material 2 of drop for storing, its underpart is communicated with a conduit 7, in liquid material 2 gravitate inflow catheter 7 in liquid reserve tank 1, the outer ring of conduit 7 is provided with piezoelectric ceramics 3, changing its internal diameter by applying square-wave signal on piezoelectric ceramics 3, making conduit 7 periodically be in conducting and by state, thus effectively control drop outgoing frequency.At drop outlets, charged ring 4 is installed, makes liquid droplet charged, changed exit velocities and the exit direction of drop by accelerating field 5 and deflecting electric field 6.Scheme disclosed in this patent application prospectus can reach the object controlling drop outgoing frequency and initial velocity, but effectively cannot control liquid-drop diameter, and with electric charge on the drop produced, is unfavorable for subsequent applications.
Meanwhile, what existing micron order dropproducing devices mostly generated is only continuous print drop chain on one wire, cannot realize the space droplet distribution in a plane, limit the range of application of dropproducing devices.
Summary of the invention
(1) technical problem that will solve
The present invention aim to provide a kind of simple and reliable high frequency, at a high speed, micron order dropproducing devices, the problems such as drop outgoing frequency in existing dropproducing devices is lower to solve, initial velocity controls not easily, outgoing liquid-drop diameter is unstable, apparatus structure is complicated.
(2) technical scheme
The present invention proposes a kind of dropproducing devices, penetrate with certain speed after static liquid material being converted into drop, this device comprises the liquid reserve tank for storage of liquids material, the bottom of this liquid reserve tank is connected with at least one feed conduit, this dropproducing devices also comprises a cavity, the center of this cavity is provided with a runner, and this runner is cylindrical and can rotate around its central shaft, and this central shaft is parallel to horizontal plane; Described feed conduit penetrates the space arriving described runner place from described cavity top, so that the liquid material in described liquid reserve tank can drop onto the side of described runner by described feed conduit, thus this runner is tangentially thrown away with drops by described liquid material from one of this runner side after the liquid material acceleration flowed into.
According to the specific embodiment of the present invention, the extended line of described feed conduit and the central shaft of described runner non-intersect.
According to the specific embodiment of the present invention, described cavity is made up of an inner housing and a shell body, and described inner housing is surrounded by shell body, and the two has certain spacing; And described runner is surrounded by described inner housing, and between this runner and this inner housing, also there is certain spacing; Described feed conduit is perforated through the space that described shell body and inner housing arrive described runner place successively from described cavity top.
According to the specific embodiment of the present invention, at inner housing and the material outlet canal being provided with inside and this shell body outside being connected this inner housing between shell body of described cavity, its quantity with described go out feed conduit identical, and the bearing of trend of this material outlet canal is consistent with the direction of advance of the drop thrown away by described runner, so that the drop thrown away by described runner can shine the outside of described cavity by this material outlet canal.
According to the specific embodiment of the present invention, the outside of described material outlet canal is provided with piezoelectric ceramics, and the internal diameter of this material outlet canal regulates by piezoelectric ceramics.
According to the specific embodiment of the present invention, be provided with fistulae between described inner housing and the outside of described shell body, so that the unnecessary liquid material in described inner housing flow to the outside of described shell body by this fistulae.
According to the specific embodiment of the present invention, the side opening of described runner is fluted, and the quantity of described groove is identical with described feed conduit, and each groove is aimed at each feed conduit.
According to the specific embodiment of the present invention, described groove is rectangular recess, v-depression, U-shaped groove or trapezoidal groove.
(3) beneficial effect
The present invention can produce radio frequency rate and diameter and all stablizes adjustable and have the micron order drop of certain initial velocity.Meanwhile, the present invention, by simple and easy repacking, can produce the droplet array with certain space distribution.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of dropproducing devices in prior art;
Fig. 2 is the structural representation of an embodiment of dropproducing devices of the present invention;
Fig. 3 is the inside cavity enlarged drawing of an embodiment of liquid end generation device of the present invention;
The numerous embodiments schematic diagram of Fig. 4 A to Fig. 4 C runner of the present invention;
Fig. 5 is the structural representation that can produce the runner of droplet array of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
The present invention aims to provide the simple and reliable micron order dropproducing devices exceeding radio frequency rate, high initial speed degree, dimensionally stable.
Fig. 2 is the structural representation of an embodiment of dropproducing devices of the present invention.As shown in Figure 2, this device comprises a liquid reserve tank 9 and a cavity, the center of cavity is provided with a runner 11, this runner 11 is cylindrical and can rotate around its central shaft, this central shaft is parallel to horizontal plane, this cavity is made up of an inner housing 12 and a shell body 13, and inner housing 12 is surrounded by shell body 13, and the two has certain spacing; Described runner 11 is surrounded by described inner housing 12, and, between runner 11 and inner housing 12, also there is certain spacing.
Liquid reserve tank 9 is positioned at the top of cavity, for storage of liquids material 8.The bottom of liquid reserve tank 9 is connected with a feed conduit 10, and this feed conduit 10 is perforated through the space that shell body 13 and inner housing 12 arrive runner 11 place successively from cavity top, like this, the liquid material 8 in liquid reserve tank 9 can drop onto the side (columniform side) of this runner 11 by this feed conduit 10.
Fig. 3 shows the enlarged drawing of the subelement of the inside cavity of this embodiment.As shown in Figure 3, the rotating shaft of described runner 11 is engaged with the rotary output axis 23 of a motor, and this motor 23 can carry out high-speed rotation, and thus, this high-speed electric expreess locomotive 23 can provide the power of high-speed rotation for runner 11.
The liquid outlet of described feed conduit 10 is positioned at the eccentric position of runner 11, and so-called eccentric position refers to that the central shaft of the extended line of described feed conduit 10 and runner 11 is non-intersect, as shown in Figure 2.Liquid material 8 flows into the edge of runner 11 by feed conduit 10, and like this, this runner 11 is tangentially thrown away with drops by described liquid material from one of this runner 11 side after the liquid material flowed into accelerates, and the drop thrown away as shown in Figure 2.When fluid-borne object 8 flows into runner constantly, the drop thrown away becomes the drop 19 ~ 23 of outgoing at certain intervals.
Described cavity inner housing 12 be provided with one between shell body 13 and be connected the inside of inner housing 12 and the material outlet canal 17 of shell body 13 outside, and the bearing of trend of this material outlet canal is consistent with the direction of advance of the drop thrown away by runner 12.Like this, the drop thrown away by runner 11 can shine the outside of cavity by this material outlet canal 17.
Control the rotating speed of runner 11, drop can be made after required runner tangential direction throws away to enter material outlet canal, and material outlet canal 17 can carry out diameter selection to the drop thrown away, and only makes diameter be less than the drop outgoing of catheter diameter.So, the drop 19 ~ 23 shining containment portion is the drops with required diameter size.
According to the preferred embodiment of the present invention, the outside of described material outlet canal 17 is provided with piezoelectric ceramics 16, and like this, the internal diameter of this material outlet canal 17 regulates by piezoelectric ceramics 16.When the internal diameter of material outlet canal 17 is excessive, the input voltage changing piezoelectric ceramics 16 makes it inwardly shrink, and conduit stressed generation elastic deformation internal diameter reduces; When the internal diameter of material outlet canal 17 is too small, reduce the input voltage of piezoelectric ceramics 16, conduit pressurized reduces, and elastic deformation recovers, and internal diameter increases.
According to another preferred embodiment of the present invention, a fistulae 18 is provided with between the inner housing 12 and the outside of shell cavity body 13 of described cavity, thus, the unnecessary liquid material in inner housing flows into the collection box 14 being positioned at the outside of shell body by this leakage fistulae 18.As shown in Figure 2, this unnecessary fluid-borne object 15 can re-start recycling.
Liquid material inputs in high speed runner 11 by feed conduit 10, and liquid material is accelerated by high speed runner 11, and in accelerator, liquid forms drop by material viscous force and surface tension effects, and its diameter is relevant with material character and runner rotating speed.When centrifugal force suffered by drop is greater than liquid after wheel surface friction, produce drop 19 ~ 23 in runner tangential direction by centrifugal action.This liquid-drop diameter is determined by the rotating speed of high speed runner, and the liquid-drop diameter of the higher generation of rotating speed is less, and liquid-drop diameter is constant when runner invariablenes turning speed.Such as, when high speed runner 11 rotating speed that diameter is about 200mm reaches 8000 revs/min, the droplet diameter of generation is about 40 μm.During high speed runner stabilization of speed, its drop generation frequency is stablized.
The foregoing describe the basic structure of one embodiment of the present of invention.On the basis of above-mentioned basic structure, in order to meet the different needs, more Curve guide impeller can be carried out to above-mentioned basic structure.The example of several improvement of explanation just exemplary below, so that those skilled in the art are easier to understand and implement this is.
Fig. 4 A ~ Fig. 4 C shows the structural representation of several embodiments of the runner in dropproducing devices of the present invention.Wherein show be along runner 11 central shaft longitudinal profile.According to the present invention, the side of described runner can be level and smooth, also can have groove, and groove is aimed at described feed conduit 10.As shown in Figure 4, Fig. 4 A shows the situation of rectangular recess, and Fig. 4 B shows the situation of v-depression, and Fig. 4 C shows the situation not having groove.Above three kinds of modes are exemplary embodiment of the present invention, such as, as long as ensure that drop equably from the outgoing of runner edge, can make various changes runner 11, U-shaped groove, trapezoidal groove etc.Therefore above-mentioned embodiment is not limited to the present invention.
By changing the quantity of runner Edge feed conduit and material outlet canal, the droplet array with certain space distribution can also be produced.Axial direction along runner 11 increases the width of axial length to required droplet array of runner, and increase multiple feed conduit and material outlet canal along high speed runner axial direction, feed conduit is identical with the number of material outlet canal simultaneously.If runner is the band groove structure shown in Fig. 4 A or Fig. 4 B, then the quantity of groove is also identical with the quantity of feed conduit, material outlet canal, each groove is aimed at each feed conduit 10, and can according to required droplet array width and density design number of recesses and charging, material outlet canal quantity; If runner for shown in Fig. 4 C without groove structure, then feed conduit and discharging opening catheter design be along runner shaft to linear structure.
Fig. 5 shows the structure of another embodiment of the runner in dropproducing devices of the present invention.As shown in Figure 5, be illustrated in figure 5 the rotaring wheel structure producing droplet array, liquid material 8 enters in multiple grooves of high speed runner by feed conduit group 24, the process produced with single drop is identical, produce single drop in each groove, due to institute fluted in drop stressing conditions identical, therefore outgoing while of institute's fluted interior drop, after the screening of material outlet canal, the drop namely producing the identical initial velocity of same diameter is capable.In an instantiation, device of the present invention can produce 40 with stabilized frequency, 000 ~ 100 each second, and 000 or more has identical characteristics fine droplet chain, can obtain the fine droplet array with certain space distribution after material outlet canal.
The present invention is widely used scope, as grenz ray, extreme ultraviolet luminescence, inkjet printing etc.In grenz ray and extreme ultraviolet luminescence, this device can provide the liquid metal target needed for light source activation, can provide ink droplet in inkjet printing.The present invention also by regulating discharging opening piezoelectric ceramics input voltage, exports the segmentation of drop chain property performance period.
The present invention utilizes rotary wheel device, effectively controls drop outgoing frequency, produce there is certain initial velocity and diameter stability contorting at micron-sized drop.Simultaneously can modifying device as required, produce the stable droplet array in a plane with certain space distribution.
First the present invention produces drop by centrifugal principle, and liquid is entered in the groove of high speed runner by feed conduit.Liquid is accelerated on high speed runner, and form drop by material viscous force and surface tension effects in accelerator, its diameter is relevant with material character and runner rotating speed.When centrifugal force suffered by drop is greater than liquid after wheel surface friction, will along the outgoing of runner tangential direction, and when runner invariablenes turning speed, liquid-drop diameter is constant.In drop production process, controlling drop outgoing frequency by controlling runner rotating speed, can stabilized frequency be obtained when stabilization of speed and the drop chain of certain initial velocity.Relative to prior art, tool of the present invention has the following advantages:
1) the present invention is the dropproducing devices based on runner, by the acceleration transformed, radio frequency rate can be produced and initial velocity all higher and stablize controlled drop;
2) the present invention have employed the controlled material outlet canal of internal diameter simultaneously, achieves stablizing of drop micron order size controlled;
3) the present invention can carry out various repacking easily, can realize the spatial distribution of droplet array.
4) the present invention has the advantages such as simple and reliable for structure, stable output, during-operation service expense are low.
5) inside and outside double-layer shell structure of the present invention regulates in the process of catheter diameter at piezoelectric ceramics and catheter diameter is evenly adjusted.Meanwhile, the security performance that insulation material improves device can be added between inside and outside shell when feed liquid is too high or too low for temperature.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a dropproducing devices, penetrate with certain speed after static liquid material being converted into drop, this dropproducing devices comprises the liquid reserve tank (9) for storage of liquids material (8), the bottom of this liquid reserve tank (9) is connected with at least one feed conduit (10), it is characterized in that:
This dropproducing devices also comprises a cavity, and the center of this cavity is provided with a runner (11), and this runner (11) is cylindrical and can rotate around its central shaft, and this central shaft is parallel to horizontal plane;
Described feed conduit (10) penetrates the space arriving described runner (11) place from described cavity top, so that the liquid material (8) in described liquid reserve tank (9) can drop onto the side of described runner (11) by described feed conduit (10), thus this runner (11) is tangentially thrown away with drops by described liquid material from one of this runner (11) side after the liquid material acceleration flowed into.
2. dropproducing devices as claimed in claim 1, is characterized in that: the extended line of described feed conduit (10) and the central shaft of described runner (11) non-intersect.
3. dropproducing devices as claimed in claim 2, is characterized in that:
Described cavity is made up of an inner housing (12) and a shell body (13), and described inner housing (12) is surrounded by shell body (13), and the two has certain spacing; And
Described runner (11) is surrounded by described inner housing (12), and also has certain spacing between this runner (11) and this inner housing (12);
Described feed conduit (10) is perforated through the space that described shell body (13) and inner housing (12) arrive described runner (11) place successively from described cavity top.
4. dropproducing devices as claimed in claim 3, is characterized in that:
At inner housing (12) and the material outlet canal (17) being provided with inside and this shell body (13) outside being connected this inner housing (12) between shell body (13) of described cavity, its quantity is identical with described feed conduit (10), and the bearing of trend of this material outlet canal (17) is consistent with the direction of advance of the drop thrown away by described runner (11), so that the drop thrown away by described runner (11) can shine the outside of described cavity by this material outlet canal (17).
5. dropproducing devices as claimed in claim 4, is characterized in that:
The outside of described material outlet canal (17) is provided with piezoelectric ceramics (16), and the internal diameter of this material outlet canal (17) regulates by piezoelectric ceramics (16).
6. dropproducing devices as claimed in claim 3, is characterized in that:
Fistulae (18) is provided with, so that the unnecessary liquid material in described inner housing (12) flow to the outside of described shell body (13) by this fistulae (18) between described inner housing (12) and the outside of described shell body (13).
7. the dropproducing devices according to any one of claim 1 to 6, is characterized in that: the side opening of described runner is fluted, and the quantity of described groove is identical with described feed conduit, and each groove is aimed at each feed conduit (10).
8. dropproducing devices as claimed in claim 7, is characterized in that: described groove is rectangular recess, v-depression, U-shaped groove or trapezoidal groove.
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| CN201310182453.6A CN103286031B (en) | 2013-05-16 | 2013-05-16 | High-frequency and high-speed micron-sized droplet generating device |
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| CN201310182453.6A CN103286031B (en) | 2013-05-16 | 2013-05-16 | High-frequency and high-speed micron-sized droplet generating device |
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| CN103286031B true CN103286031B (en) | 2015-07-22 |
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Families Citing this family (4)
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| CN104932089B (en) * | 2015-07-07 | 2017-05-31 | 中国科学院光电研究院 | A kind of high frequency, high speed, the droplet array generation device of dimensionally stable |
| CN111871634B (en) * | 2020-07-26 | 2021-07-16 | 上海交通大学 | High-speed liquid drop generating device based on cam structure |
| CN113025478B (en) * | 2021-02-25 | 2021-09-21 | 中食安泓(广东)健康产业有限公司 | Micro-fluidic device, detection system and detection method for POCT quantitative nucleic acid detection |
| CN113499927B (en) * | 2021-06-24 | 2022-05-03 | 浙江大学 | Particle size adjustable liquid drop generating system |
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| RU2080191C1 (en) * | 1994-04-27 | 1997-05-27 | Николай Всеволодович Городецкий | Liquid sprayer |
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