CN101187387A - Three-rib type micro pneumatic valve - Google Patents
Three-rib type micro pneumatic valve Download PDFInfo
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- CN101187387A CN101187387A CNA2007101900337A CN200710190033A CN101187387A CN 101187387 A CN101187387 A CN 101187387A CN A2007101900337 A CNA2007101900337 A CN A2007101900337A CN 200710190033 A CN200710190033 A CN 200710190033A CN 101187387 A CN101187387 A CN 101187387A
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Abstract
The invention relates to a three-rib type minisize air-operated valve for controlling the flow direction and the flow of liquid. The structure is that a first level rib, a second level rib and a third level rib are arranged in the order from left to right to form the three-rib type minisize air-operated valve, wherein the first level rib is constituted by an upper part and a lower part which are symmetrical, and is positioned on the left end of the minisize valve. The second level rib is constituted by an upper part and a lower part which are symmetrical, and is positioned on the right side of the first level rib, and the second level rib is parallel with the first level rib, and the left apical angle of the third level rib is located on the right end of the minisize valve. The invention has the advantages that the three-rib type minisize air-operated valve controls counter flow through a novel fluid dynamics principle, the flow difference between forward direction and negative direction is increased, the fluid flow quantity transferred by a minisize ejector such as a micro pump is significantly increased, and the efficiency is increased to four times of a dynamic passive valve, and the invention has high reliability, long service life, easy processing and low costs. The invention provides a micro flow system control device which has favorable comprehensive performance for military or civil places comprising the fields of aviation, space fight, medical treatment and automobile and the like.
Description
Technical field
What the present invention relates to is a kind of three-rib type micro pneumatic valve, is used for the fluid flow direction and the flow size is controlled, and belongs to the control gear technical field of micro-flow system.
Background technique
In recent years, develop rapidly along with microelectromechanical systems, micro-flow system, micro-processing technology, the miniature jet device that serves as main representative with Micropump, synthetic spray not only is successfully applied to miniature injection, little aspects such as seal, medicine trace dispensing, micro-component heat radiation that spray (referring to Woias P, " 20 years development courses of Micropump are summed up " (" Micropumps-summarizing the first two decades "), SPIE's procceedings (Proceedings of SPIE), calendar year 2001 the 4560th is rolled up the 39-52 page or leaf); Referring to Bratter R L, " business success that microelectromechanical systems market is obtained " (" Commercial success in the MEMS marketplace "), optics microelectromechanical systems proceeding (Proceedings of Optical MEMS ' 2000) in 2000, the 29-30 page or leaf), more separate and conveying at DNA, ACTIVE CONTROL flows, fields such as little aircraft and microminiature satellite booster have broad prospect of application (referring to Ivan A, " miniature instrument: start the microscopic fields revolution " (" Micromachines:Fomenting a revolution; in miniature "), " science " magazine, 1998 the 282nd volumes, the 402-405 page or leaf; Referring to McMichael J M, " adopt the Active Flow Control state of the art and the prospect of microelectromechanical systems " (" Progress and prospectsfor active flow control using Microfabricated ElectromechanicalSystems "), the report of US Airways space flight association, numbering 96-0306 (AIAA-96-0306)).
As the key components of control flow direction and flow size in the miniature jet device, little valve is an important research field in the micro-flow system always.Little valve is according to there being no-movable part can be divided into two kinds of aggressive valve and passive valve, research both at home and abroad at present mainly concentrates on passive valve, and mostly be the dynamic passive valve (Dynamic Passive Valve) of three-legged structure, it utilizes fluid from just, the different principle of flow losses when contrary both direction flows through little valve, realize the one-way transmission of fluid, and have simple in structure, good reliability, life-span is long, do not cause extra flow resistance and energy consumption, can work in advantages such as high-frequency resonant state, but its efficient has only 5%～10% (referring to Gerlach T etc., " dynamically Micropump working principle and performance " (" Working Principle and Performanceof the Dynamic Micropump "), " sensor and actuator A " (" Sensors andActuators A "), nineteen ninety-five the 50th rolls up, the 135-140 page or leaf), low like this efficient will inevitably reduce the effect of miniature jet device even influence Application feasibility.
Summary of the invention
Purpose of the present invention is intended to overcome the very low defective of dynamic passive valve efficient, a kind of three-rib type micro pneumatic valve that can be applicable to miniature jet device, control fluid flow direction and flow size is proposed, suppress adverse current by new fluid mechanics principle, thereby just increase, reverse difference in flow to be significantly improving efficient, and then improve the effect of miniature jet device.
Technical solution of the present invention: it is characterized in that one-level rib, secondary rib, three grades of ribs arrange successively according to order from left to right, constitute three-rib type micro pneumatic valve, wherein the one-level rib is made up of laterally zygomorphic two-part, be positioned at the left end of little valve, the secondary rib also is made up of laterally zygomorphic two-part, is located at the right side of one-level rib, and is parallel with the one-level rib, three grades of rib left side drift angles adopt arc structure, are positioned at the right-hand member of little valve.Three grades of ribs are made of arc section, tilting section and vertical wall.
The invention has the beneficial effects as follows, three-rib type micro pneumatic valve suppresses adverse current by new fluid mechanics principle, thereby just increase, reverse difference in flow, the configured scheme of one, two, three rib has improved the efficient of little valve significantly, reach 4 times of dynamic passive valve efficient, enlarged markedly the fluid flow that miniature jet devices such as Micropump carry and increase work efficiency, and reliability height, life-span are long, process easily, cost is low.Can be various military, civilian occasions, comprise fields such as Aeronautics and Astronautics, medical treatment, automobile, a kind of micro-flow system control gear of good combination property is provided.
Description of drawings
Accompanying drawing 2 is that fluid is from the flow schematic diagram of forward by three-rib type micro pneumatic valve.
Accompanying drawing 3 is that fluid is from reverse flow schematic diagram by three-rib type micro pneumatic valve.
1 is the one-level rib among the figure, the 2nd, and the secondary rib, 3 is three grades of ribs; W is little valve inner width, d is an I and II rib width of jet, θ is an I and II rib convergent angle, φ is the angle of one-level rib downstream inclined wall and horizontal wall surface, L1 is the level interval of one-level rib and secondary rib, L2 is the diagonal length of secondary rib, and L3 is the level interval on secondary rib spout and three grades of rib arc section summits, and L4 is the vertical wall length of three grades of ribs; R1 is an one-level rib transition circle segmental arc radius, and R2 is a secondary rib transition circle segmental arc radius, and β is three grades of rib left side drift angle angles.
Embodiment
Contrast Fig. 1, its structure is that one-level rib 1, secondary rib 2, three grades of ribs 3 are arranged successively according to order from left to right, constitute three-rib type micro pneumatic valve, wherein one-level rib 1 is made up of laterally zygomorphic two-part, is positioned at the left end of little valve, and secondary rib 2 also is made up of laterally zygomorphic two-part, be located at the right side of one-level rib 1, parallel with one-level rib 1, three grades of rib 3 left drift angles adopt arc structure, are positioned at the right-hand member of little valve.Rely on the configured of these three grades of ribs, three-rib type micro pneumatic valve can obtain bigger just, reverse difference in flow, thus the efficient of significantly improving:
Described one-level rib 1, secondary rib 2 all adopt convergence type structure, and used arc transition at the spout place, the pressure loss when reducing the fluid forward flow, the arc section of three grades of ribs 3 and the mild transition of sectional shape that tilting section has guaranteed the forward runner simultaneously, it is smooth and easy that fluid is flowed, cause flow losses (as shown in Figure 2) hardly, thus the flow when increasing forward flow;
Described one-level rib 1, the downstream wall of secondary rib 2 changes inclined wall into by the vertical wall of routine, bootable retrograde fluid flows along the streamline that helps increasing reverse loss, the vertical wall of three grades of ribs 3 stops segment fluid flow simultaneously, after residual fluid is walked around three grades of ribs 3, under effect of inertia, zone line to secondary rib 2 and three grades of ribs 3 flows hardly, but directly flow between one-level rib 1 and the secondary rib 2, strong collision takes place in one-level rib 1 spout place then, after further weakening, just flow out (as shown in Figure 3), the flow when so just significantly having reduced reverse flow from spout.Rely on the configured of these three grades of ribs, three-rib type micro pneumatic valve can obtain bigger just, reverse difference in flow, thus the efficient of significantly improving.
Described one-level rib 1, secondary rib 2 width of jet d get 0.1～5mm, one of little valve inner width W 〉=6 times, secondary rib width of jet d, one-level rib 1, secondary rib 2 convergent angle θ get 90～150 degree, one-level rib 1 downstream wall is an inclined wall, one-level rib 1 with included angle=0.5 of horizontal wall surface times, secondary rib 2 convergent angle θ, transition circle segmental arc radius R 1 get (1～2) doubly one, secondary rib width of jet d, central angle alpha 1 value of one-level rib 1 transition circle segmental arc is identical with the included angle of one-level rib downstream inclined wall and horizontal wall surface; The secondary rib is parallel with the one-level rib, the level interval L1 of one-level rib 1 and secondary rib 2 gets (0.3～0.6) I and II rib width of jet d doubly, secondary rib 2 diagonal length L2 get (1～2) I and II rib width of jet d doubly, transition circle segmental arc radius R 2 is got (1～2) I and II rib width of jet d doubly, and round α 2 values of secondary rib 2 transition circle segmental arcs are identical with the included angle of one-level rib downstream inclined wall and horizontal wall surface;
Three grades of ribs 3 are made of arc section, tilting section and vertical wall.
The level interval L3 of three grades of rib 3 arc section summits and secondary rib 2 spouts gets (0.5～1) I and II rib width of jet d doubly, three grades of rib 3 left drift angle angle betas are got 30～90 degree, and the vertical wall length L 4 of three grades of ribs is got (0.4～0.8) little valve inner width W doubly.
The thickness of three-rib type micro pneumatic valve can be selected according to different applying flexibles.
The making method of three-rib type micro pneumatic valve, the process step that it is characterized in that this method is divided into, (1) adopts linear cutting machine, between tool electrode that constitutes along the wire of guide rail movement and metal workpiece, apply pulsed voltage, make pulsing sparkover between tool electrode and the metal workpiece, galvanic corrosion, removal metal and excision forming are processed required electrode thereby make fine electric spark; (2) adopt spark erosion plant, between prepared electrode of process step () and processed piece, apply changing electric field periodically fast, localized hyperthermia by Pulsed Discharge makes workpiece surface metal molten, gasification and ablation metal, thereby makes the three-rib type micro pneumatic valve structure.
Embodiment
At first adopting red copper is electrode material, makes as shown in Figure 5 electrode by described wire cutting technology, is structural material with duralumin then, uses described electrical discharge machining process to obtain as shown in Figure 6 three-rib type micro pneumatic valve.The each several part size is as follows according to the regulation of the ratio in embodiment value:
One, secondary rib width of jet d gets 1mm, little valve inner width W gets 10mm, one, secondary rib convergent angle θ gets 120 degree, the included angle of one-level rib 1 downstream inclined wall and horizontal wall surface is 60 degree, one-level rib 1 transition circle segmental arc radius R 1 is got 1mm, the central angle alpha 1 of one-level rib 1 transition circle segmental arc is 60 degree, one-level rib 1 is got 0.3mm with secondary rib 2 level interval L1, secondary rib 2 diagonal length L2 get 1.8mm, secondary rib 2 transition circle segmental arc radius Rs 2 are got 1.5mm, the central angle alpha 2 of secondary rib 2 transition circle segmental arcs is 60 degree, the level interval L3 of three grades of rib 3 arc section summits and secondary rib 2 spouts gets 0.7mm, three grades of rib 3 left drift angle angle betas are got 60 degree, and the vertical wall length L 4 of three grades of ribs 3 is got 5mm.The thickness of three-rib type micro pneumatic valve is 1mm.
Embodiment's beneficial effect: by numerical calculation and laboratory facilities, dynamic passive valve and three-rib type micro pneumatic valve embodiment to three-legged structure have carried out the efficient contrast, the result shows that the efficient of the dynamic passive valve of three-legged structure is 6%～7%, and three-rib type micro pneumatic valve embodiment's efficient is 28%～29%, bring up to dynamic passive valve 4 times.Like this, when being applied to the miniature jet device, three-rib type micro pneumatic valve can enlarge markedly the fluid flow of conveying and increase work efficiency.
Claims (4)
1. three-rib type micro pneumatic valve, it is characterized in that one-level rib, secondary rib, three grades of ribs arrange successively according to order from left to right, constitute three-rib type micro pneumatic valve, wherein the one-level rib is made up of laterally zygomorphic two-part, is positioned at the left end of little valve, and the secondary rib also is made up of laterally zygomorphic two-part, be located at the right side of one-level rib, parallel with the one-level rib, three grades of rib left side drift angles adopt arc structure, are positioned at the right-hand member of little valve.
2. three-rib type micro pneumatic valve according to claim 1 is characterized in that described three grades of ribs are made of arc section, tilting section and vertical wall.
3. three-rib type micro pneumatic valve according to claim 1 it is characterized in that described one-level rib, secondary rib all adopt convergence type structure, and in spout place arc transition, the downstream wall is inclined wall.
4. three-rib type micro pneumatic valve according to claim 2, the level interval that it is characterized in that described three grades of rib arc section summits and secondary rib spout is got (0.5～1) I and II rib width of jet doubly, three grades of rib left side drift angle angles are got 30～90 degree, and the vertical wall length of three grades of ribs is got (0.4～0.8) little valve inner width doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101900337A CN101187387A (en) | 2007-11-20 | 2007-11-20 | Three-rib type micro pneumatic valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101900337A CN101187387A (en) | 2007-11-20 | 2007-11-20 | Three-rib type micro pneumatic valve |
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| Publication Number | Publication Date |
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| CN101187387A true CN101187387A (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101900337A Pending CN101187387A (en) | 2007-11-20 | 2007-11-20 | Three-rib type micro pneumatic valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775147A (en) * | 2016-04-08 | 2016-07-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Aircraft inlet closed-loop flow control device and control method |
| CN112555556A (en) * | 2020-10-27 | 2021-03-26 | 中国原子能科学研究院 | Inverted tooth type throttling element |
-
2007
- 2007-11-20 CN CNA2007101900337A patent/CN101187387A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775147A (en) * | 2016-04-08 | 2016-07-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Aircraft inlet closed-loop flow control device and control method |
| CN105775147B (en) * | 2016-04-08 | 2017-08-18 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of airplane intake closed-loop flow control device and control method |
| CN112555556A (en) * | 2020-10-27 | 2021-03-26 | 中国原子能科学研究院 | Inverted tooth type throttling element |
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