CN103286031A - 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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- CN103286031A CN103286031A CN 201310182453 CN201310182453A CN103286031A CN 103286031 A CN103286031 A CN 103286031A CN 201310182453 CN201310182453 CN 201310182453 CN 201310182453 A CN201310182453 A CN 201310182453A CN 103286031 A CN103286031 A CN 103286031A
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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 drop generation device that exceeds 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, growing field need provide micron order diameter, dimensionally stable, the outgoing frequency is higher and have the drop generation device of certain initial velocity,, inkjet printing luminous such as grenz ray, extreme ultraviolet etc.Such demand promotion correlative study continues to bring out.
Be that US4723262B1, denomination of invention are the United States Patent (USP) of " APPARATUS FOR PRODUCTION SOFT X-RAYS USING A HIGH ENERGY LASER BEAM " such as publication number, utilize fluid pressure differential that the liquid in the liquid reserve tank is extruded by conduit, form stream of liquid droplets.This apparatus structure is simple, but can't effectively control liquid-drop diameter, drop outgoing frequency and outgoing speed.
Aspect the control liquid-drop diameter, publication number is that US2007257970A1, denomination of invention are at first carried out current limliting by conduit to liquid in the United States Patent (USP) prospectus of " DROPLETS GENERATOR ", make fluid separation applications become each droplet by the piezo-electric crystal vibration again, at last by the nozzle outgoing.Though liquid-drop diameter can effectively be controlled by the vibration frequency of piezo-electric crystal, the drop outgoing initial velocity that this method generates is lower, can't be applied to the drop initial velocity device that has certain requirements.
Improving aspect the initial velocity, publication number is that the Chinese patent prospectus that CN102210997A, name are called " individual particle high speed drop generating device " has proposed drop generating device shown in Figure 1.As shown in Figure 1, liquid reserve tank 1 is used for storing the liquid material 2 that forms drop, its underpart is communicated with a conduit 7, in the liquid material 2 gravitate inflow catheters 7 in the liquid reserve tank 1, the outer ring of conduit 7 is equipped with piezoelectric ceramics 3, change its internal diameter by applying square-wave signal at piezoelectric ceramics 3, make conduit 7 periodically be in conducting and by state, thereby control drop outgoing frequency effectively.In the drop outlet charged ring 4 is installed, is made liquid droplet charged, change outgoing speed and the exit direction of drop by accelerating field 5 and deflecting electric field 6.The disclosed scheme of this patent application prospectus can reach the purpose of control drop outgoing frequency and initial velocity, but can't effectively control liquid-drop diameter, and has electric charge on the drop that produces, and is unfavorable for subsequent applications.
Simultaneously, existing micron order drop generation device mostly generates is continuous drop chain on a line only, can't realize a space droplet distribution on the plane, has limited the range of application of drop generation device.
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 drop generation device, problems such as drop outgoing frequency is lower to solve in the existing drop generation device, initial velocity control is difficult for, outgoing liquid-drop diameter instability, apparatus structure complexity.
(2) technical scheme
The present invention proposes a kind of drop generation device, after static liquid material being converted into drop, penetrate with certain speed, this device comprises the liquid reserve tank for the storage of liquids material, the bottom of this liquid reserve tank is connected with at least one feed conduit, this drop generation device 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 axes is in horizontal plane; Described feed conduit penetrates the space that arrives described runner place from described cavity top, so that the liquid material in the described liquid reserve tank can drop onto the side of described runner by described feed conduit, thereby this runner tangentially throws away described liquid material from of this runner side for the liquid material that flows into accelerates the back with the drop form.
According to the specific embodiment of the present invention, the extended line of described feed conduit and the central shaft of described runner are 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 also has certain spacing between this runner and this inner housing; Described feed conduit penetrated 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, between the inner housing of described cavity and shell body, be provided with the inside that is connected this inner housing and the material outlet canal of this shell body outside, its quantity is with described to 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 that is thrown away by described runner, so that can be shone the outside of described cavity by this material outlet canal by the drop that described runner throws away.
According to the specific embodiment of the present invention, the outside of described material outlet canal is equipped with piezoelectric ceramics, and the internal diameter of this material outlet canal can be regulated by piezoelectric ceramics.
According to the specific embodiment of the present invention, between the outside of described inner housing and described shell body, be provided with fistulae, so that the excess liquid material in the 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 of described runner has groove, 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 stablize adjustable and have the micron order drop of certain initial velocity.Simultaneously, the present invention can produce the drop array with certain space distribution by simple and easy repacking.
Description of drawings
Fig. 1 is the structural representation of a kind of drop generation device in the prior art;
Fig. 2 is the structural representation of an embodiment of drop generation device 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 drop array of the present invention.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, 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 drop generation device that exceeds radio frequency rate, high initial speed degree, dimensionally stable.
Fig. 2 is the structural representation of an embodiment of drop generation device 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 axes is in 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, also have certain spacing between runner 11 and the inner housing 12.
Fig. 3 has shown the enlarged drawing of subelement of the inside cavity of this embodiment.As shown in Figure 3, rotary output axis 23 interlocks of the rotating shaft of described runner 11 and a motor, 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 passes through the edge that feed conduit 10 flows into runners 11, and like this, one from these runner 11 sides after the liquid material that this runner 11 is inflow accelerates tangentially throws away described liquid material with the drop form, and the drop that throws away as shown in Figure 2.When liquid object 8 flowed into runner constantly, the drop that throws away became the drop 19～23 of outgoing at certain intervals.
Between the inner housing 12 of described cavity and shell body 13, be provided with a material outlet canal 17 that is connected inside and shell body 13 outsides of inner housing 12, and the bearing of trend of this material outlet canal is consistent with the direction of advance of the drop that is thrown away by runner 12.Like this, the drop that is thrown away by runner 11 can shine the outside of cavity by this material outlet canal 17.
The rotating speed of control runner 11 can make drop enter material outlet canal after required runner tangential direction throws away, and material outlet canal 17 can carry out diameter to the drop that throws away to be selected, and only makes diameter less than the drop outgoing of catheter diameter.So, shine the drop 19～23rd of cavity outside, the drop with required diameter size.
According to preferred embodiment of the present invention, the outside of described material outlet canal 17 is equipped with piezoelectric ceramics 16, and like this, the internal diameter of this material outlet canal 17 can be regulated by piezoelectric ceramics 16.When the internal diameter of material outlet canal 17 was excessive, the input voltage that changes piezoelectric ceramics 16 made its inside contraction, and the stressed generation elastic deformation of conduit internal diameter reduces; When the internal diameter of material outlet canal 17 is too small, reduce the input voltage of piezoelectric ceramics 16, the conduit pressurized reduces, and elastic deformation recovers, and internal diameter increases.
According to another preferred embodiment of the present invention, between the outside of the inner housing 12 of described cavity and shell cavity body 13, be provided with a fistulae 18, thus, the excess liquid material in the inner housing can flow into a collection box 14 of the outside that is positioned at shell body by this fistulae 18.As shown in Figure 2, this excess liquid object 15 can be recycled again.
Feed conduit 10 is imported liquid material in the high speed runner 11, and liquid material accelerates by high speed runner 11, and liquid is subjected to material viscous force and surface tension effects to form drop in the accelerator, and its diameter is relevant with material character and runner rotating speed.When the suffered centrifugal force of drop greater than liquid after the suffered frictional force of wheel surface, be subjected to centrifugal action to produce drop 19～23 in the runner tangential direction.This liquid-drop diameter determines that by the rotating speed of high speed runner the liquid-drop diameter of the more high generation of rotating speed is more little, and liquid-drop diameter is constant when the runner invariablenes turning speed.When for example diameter high speed runner 11 rotating speeds that are about 200mm reached 8000 rev/mins, the droplet diameter of generation was about 40 μ m.During the high speed runner stabilization of speed, its drop produces frequency stabilization.
The basic structure of one embodiment of the present of invention has more than been described.On the basis of above-mentioned basic structure, in order to meet the different needs, can more improve design to above-mentioned basic structure.With regard to several improved examples of exemplary explanation, this is with enforcement so that those skilled in the art are easier to understand below.
Fig. 4 A～Fig. 4 C has shown the structural representation of the several embodiments of the runner in the drop generation device of the present invention.Wherein show be along the central shaft of runner 11 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 has shown the situation of rectangular recess, and Fig. 4 B has shown the situation of v-depression, and Fig. 4 C has shown the situation that does not have groove.More than three kinds of modes be exemplary embodiment of the present invention, can do various variations to runner 11, for example U-shaped groove, trapezoidal groove etc. equably from the outgoing of runner edge as long as guarantee drop.Therefore above-mentioned embodiment is not limited to the present invention.
Has the drop array that certain space distributes by changing the quantity of runner Edge feed conduit and material outlet canal, can also producing.Axial direction along runner 11 increases the axial length of runner to the width of required drop array, increases multiple feed conduit and material outlet canal along the high speed runner axial direction simultaneously, and the number of feed conduit and material outlet canal is identical.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 be according to required drop array-width and density design groove quantity and charging, material outlet canal quantity; If runner is the no groove structure shown in Fig. 4 C, then feed conduit and discharging opening catheter design be along runner shaft to linear structure get final product.
Fig. 5 has shown the structure of another embodiment of the runner in the drop generation device of the present invention.As shown in Figure 5, be illustrated in figure 5 as the rotaring wheel structure that produces the drop array, liquid material 8 enters in a plurality of grooves of high speed runner by feed conduit group 24, the process that produces with single drop is identical, produce single drop in each groove, because the drop stressing conditions of institute in fluted is identical, the therefore fluted interior drop while outgoing of institute, through after the screening of material outlet canal, the drop that namely produces the identical initial velocity of same diameter is capable.In an instantiation, device of the present invention can produce 40,000～100 with stabilized frequency each second, 000 or have an identical characteristics fine droplet chain, can obtain having the fine droplet array that certain space distributes behind material outlet canal more.
The present invention's scope that is widely used,, inkjet printing luminous as grenz ray, extreme ultraviolet etc.In grenz ray and extreme ultraviolet were luminous, this device can provide light source activation required liquid metal target, can provide ink droplet in inkjet printing.The present invention also can export the segmentation of drop chain property performance period by regulating discharging opening piezoelectric ceramics input voltage.
The present invention utilizes rotary wheel device, effectively controls drop outgoing frequency, and generation has certain initial velocity and diameter is stablized control at micron-sized drop.While is modifying device as required, is created in to have the stable droplet array that certain space distributes in the plane.
The present invention at first produces drop by centrifugal principle, and liquid enters in the groove of high speed runner by feed conduit.Liquid is accelerated at high speed runner, is subjected to material viscous force and surface tension effects to form drop in the accelerator, and its diameter is relevant with material character and runner rotating speed.When the suffered centrifugal force of drop greater than liquid after the suffered frictional force of wheel surface, will be along the outgoing of runner tangential direction, and liquid-drop diameter is constant when the runner invariablenes turning speed.In the drop production process, by control runner rotating speed control drop outgoing frequency, when stabilization of speed, can obtain the drop chain of stabilized frequency and certain initial velocity.With respect to prior art, the present invention has following advantage:
1) the present invention is based on the drop generation device of runner, by the acceleration that transforms, can produce all drops of higher and stable and controllable of radio frequency rate and initial velocity;
2) the present invention has adopted the controlled material outlet canal of internal diameter simultaneously, has realized the stable and controllable of drop micron order size;
3) the present invention can carry out various repackings easily, can realize the spatial distribution of drop array.
4) the present invention has advantages such as simple and reliable for structure, that output is stable, the during-operation service expense is low.
5) inside and outside double-layer shell structure of the present invention is evenly adjusted catheter diameter in the process of piezoelectric ceramics adjusting catheter diameter.Simultaneously, when feed liquid is too high or too low for temperature, can between inside and outside shell, add the security performance that insulation material improves device.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; be understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. drop generation device, after static liquid material being converted into drop, penetrate with certain speed, this dress drop produces and puts the liquid reserve tank (9) that comprises for storage of liquids material (8), and the bottom of this liquid reserve tank (9) is connected with at least one feed conduit (10), it is characterized in that:
This drop generation device 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 axes is in horizontal plane;
Described feed conduit (10) penetrates the space that arrives described runner (11) place from described cavity top, so that the liquid material (8) in the described liquid reserve tank (9) can drop onto the side of described runner (11) by described feed conduit (10), thereby this runner (11) tangentially throws away described liquid material from of this runner (11) side after accelerating for the liquid material that flows into the drop form.
2. drop generation device as claimed in claim 1, it is characterized in that: the central shaft of the extended line of described feed conduit (10) and described runner (11) is non-intersect.
3. drop generation device 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) penetrated the space that described shell body (13) and inner housing (12) arrive described runner (11) place successively from described cavity top.
4. drop generation device as claimed in claim 3 is characterized in that:
Between the inner housing (12) of described cavity and shell body (13), be provided with the outside material outlet canal (17) of the inside that is connected this inner housing (12) and this shell body (13), its quantity is with described to go out feed conduit (10) identical, and the bearing of trend of this material outlet canal (17) is consistent with the direction of advance of the drop that is thrown away by described runner (12), so that can be shone the outside of described cavity by this material outlet canal (17) by the drop that described runner (11) throws away.
5. drop generation device as claimed in claim 3 is characterized in that:
The outside of described material outlet canal (17) is equipped with piezoelectric ceramics (16), and the internal diameter of this material outlet canal (17) can be regulated by piezoelectric ceramics (16).
6. drop generation device as claimed in claim 3 is characterized in that:
Between the outside of described inner housing (12) and described shell body (13), be provided with fistulae (18), so that the excess liquid material in the described inner housing (12) flow to the outside of described shell body (13) by this fistulae (18).
7. as each described drop generation device in the claim 1 to 6, it is characterized in that: the side of described runner has groove, and the quantity of described groove is identical with described feed conduit, and each groove is aimed at each feed conduit (10).
8. drop generation device as claimed in claim 7, it 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 CN103286031B (en) | 2015-07-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104932089A (en) * | 2015-07-07 | 2015-09-23 | 中国科学院光电研究院 | High-frequency, high-speed and stable-size liquid drop array generation apparatus |
| CN111871634A (en) * | 2020-07-26 | 2020-11-03 | 上海交通大学 | High-speed liquid drop generating device based on cam structure |
| CN113025478A (en) * | 2021-02-25 | 2021-06-25 | 王奔 | Micro-fluidic device, detection system and detection method for POCT quantitative nucleic acid detection |
| CN113499927A (en) * | 2021-06-24 | 2021-10-15 | 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 |
| EP1358004B1 (en) * | 2001-01-18 | 2007-12-12 | Ultrasonic Dryer Ltd. | Method and apparatus for production of droplets |
| US6789741B2 (en) * | 2002-03-27 | 2004-09-14 | S. C. Johnson & Son, Inc. | Method and apparatus for atomizing liquids having minimal droplet size |
| JP3956222B2 (en) * | 2002-09-24 | 2007-08-08 | コニカミノルタホールディングス株式会社 | Liquid ejection device |
| CA2545597A1 (en) * | 2006-03-15 | 2007-09-15 | Institut Pasteur | Novel isolated and purified strains of chikungunya virus and polynucleotides and polypeptides sequences, diagnostic and immunogenical uses thereof |
| CN101229535A (en) * | 2008-01-08 | 2008-07-30 | 东南大学 | Ultrasonic atomizer apparatus |
| CN101703980A (en) * | 2009-11-09 | 2010-05-12 | 哈尔滨工程大学 | Ultrasonic wave and pressure rotary atomizer |
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- 2013-05-16 CN CN201310182453.6A patent/CN103286031B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104932089A (en) * | 2015-07-07 | 2015-09-23 | 中国科学院光电研究院 | High-frequency, high-speed and stable-size liquid drop array generation apparatus |
| 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 |
| CN111871634A (en) * | 2020-07-26 | 2020-11-03 | 上海交通大学 | High-speed liquid drop generating device based on cam structure |
| CN111871634B (en) * | 2020-07-26 | 2021-07-16 | 上海交通大学 | High-speed liquid drop generating device based on cam structure |
| CN113025478A (en) * | 2021-02-25 | 2021-06-25 | 王奔 | Micro-fluidic device, detection system and detection method for POCT quantitative nucleic acid detection |
| 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 |
| CN113499927A (en) * | 2021-06-24 | 2021-10-15 | 浙江大学 | Particle size adjustable liquid drop generating system |
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Effective date of registration: 20200803 Address after: 100029 Beijing city Chaoyang District Beitucheng West Road No. 3 Patentee after: Institute of Microelectronics, Chinese Academy of Sciences Address before: 100190, No. 19 West Fourth Ring Road, Beijing, Haidian District Patentee before: Research Institute of aerospace information innovation, Chinese Academy of Sciences Effective date of registration: 20200803 Address after: 100190, No. 19 West Fourth Ring Road, Beijing, Haidian District Patentee after: Research Institute of aerospace information innovation, Chinese Academy of Sciences Address before: 100094, No. 9 Deng Nan Road, Beijing, Haidian District Patentee before: Academy of Opto-Electronics, Chinese Academy of Sciences |