CN101858374B - Design method of serial-connection laminar flow capillary - Google Patents
Design method of serial-connection laminar flow capillary Download PDFInfo
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- CN101858374B CN101858374B CN2010101789666A CN201010178966A CN101858374B CN 101858374 B CN101858374 B CN 101858374B CN 2010101789666 A CN2010101789666 A CN 2010101789666A CN 201010178966 A CN201010178966 A CN 201010178966A CN 101858374 B CN101858374 B CN 101858374B
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Abstract
The invention relates to a design method of serial-connection laminar flow capillary, which belongs to the field of the fluid control, and is characterized in that micro-pore laminar flow principle is adopted as a foundation, against for the weaknesses of the single slender micro-pore in the realization and detection, a design concept of a serial-connection laminar flow capillary is provided. The serial-connection laminar flow capillary is formed by joining a plurality of identical short capillary tubes. The design method of the serial-connection laminar flow capillary comprises the steps that: determining the quantity of the short capillary tubes and determining the design parameter of the short capillary tubes; the design parameters of the short capillary tubes comprise: diameter d of a capillary cavity (1), and length l1 of the capillary cavity (1); diameter D of a buffering cavity (2), and length l2 of buffering cavity (2); the parameters satisfy the following condition: D is more than or equal to 10*d; l1 is more than ore equal to 10*d, and l2 is more than or equal to 2*d; the quantity n of the short capillary tubes satisfies: L is the length of the serial-connection lamina flow capillary and is known; and two end cross sections of the short capillary tubes are respectively provided with a sealing ring groove for installing a sealing ring. The design method is direct, correct, simple and feasible.
Description
Technical field
The present invention relates to a kind of design method of serial-connection laminar flow capillary, belong to fluid control field, be applicable to that fluid shock absorbing, micro-flow measurement and tightness detect.
Background technique
The laminar flow capillary tube is the fluid damping element of extensive use in the fields such as fluid shock absorbing, micro-flow measurement, tightness detection.At present, laminar flow structural type capillaceous all is to be realized by a single laminar flow capillary tube.In case single laminar flow capillary tube completion of processing, its length, diameter, shape is all fixed, and damping characteristic is also fixing thereupon, and application area is limited to.
In the laminar flow actual application capillaceous, wish that usually it has bigger damping, the laminar flow capillary tube of big damping is generally realized by increasing laminar flow length diameter ratio capillaceous.Dual mode is specifically arranged: 1. keep laminar flow length capillaceous constant, reduce laminar flow diameter capillaceous; 2. keep laminar flow diameter capillaceous constant, increase laminar flow length capillaceous.
Yet, reduce laminar flow diameter capillaceous or increase laminar flow length capillaceous bring difficulty all can for laminar flow processing and fabricating capillaceous.Because laminar flow diameter capillaceous is generally very little, usually can't realize maybe can not guaranteeing the precision of laminar flow capillary diameter by traditional mechanical punching, at present generally adopt the mode of laser boring to realize for the processing of micropore, yet in laser processing technology, because there is decay in laser energy in the process of penetrating, when the laminar flow capillary pipe length is long, be difficult to guarantee laminar flow parallelism capillaceous, increase along with the laminar flow capillary pipe length, the decay of laser energy is also obvious further, thereby the laminar flow parallelism capillaceous that causes forming can not satisfy the needs that detect or measure.
Summary of the invention
The objective of the invention is to overcome the deficiency that present prior art exists, propose a kind of design method of serial-connection laminar flow capillary.The present invention is a primary element with the short capillary that is easy to process, and needs according to design then, determines the quantity of short capillary, becomes the serial-connection laminar flow capillary tube through tandem compound.
The objective of the invention is to be achieved through the following technical solutions.
A kind of serial-connection laminar flow capillary tube is formed by connecting by n (n is a positive integer) identical short capillary, and its design method comprises the quantity n of definite short capillary and the design parameter of definite short capillary.
Described short capillary is a kind of hollow tube, and thin in the middle of its internal diameter, two ends are thick, and middle thin part is called the capillary chamber, and the thick part in two ends is called buffer cavity.
The design parameter of described short capillary comprises: the diameter d in capillary chamber, the length l in capillary chamber
1The diameter D of buffer cavity, the length l of buffer cavity
2These parameters satisfy formula 1 to formula 3:
D≥10×d； (1)
l
1≥10×d； (2)
l
2≥2×d (3)
Wherein, the diameter d in capillary chamber is a known quantity;
The quantity n of described short capillary satisfies formula 4:
Wherein L is a serial-connection laminar flow length capillaceous, is known quantity.
The seal groove that seal ring is installed is arranged respectively on two end sections of described short capillary; When n short capillary is cascaded, in the sealing ring recess, load onto seal ring, play seal action.
Beneficial effect
The present invention is based on aperture laminar flow theory, and the deficiency at the single elongated pore exists in realizing and detecting has proposed serial-connection laminar flow design philosophy capillaceous.The serial-connection laminar flow capillary tube has not only remedied deficiency in the modern mechanical processing with the characteristics on its structural design, and has satisfied the variable highi degree of accuracy of range simultaneously and detected demand.
Description of drawings
Fig. 1 is the axis profile figure of the present invention about the short capillary in a kind of a kind of embodiment of design method of serial-connection laminar flow capillary;
Fig. 2 is the end view drawing of the present invention about the short capillary in a kind of a kind of embodiment of design method of serial-connection laminar flow capillary;
Wherein: 1-capillary chamber; The 2-buffer cavity; The 3-seal groove.
Embodiment
According to technique scheme, the present invention is described in detail below in conjunction with embodiment.
In conjunction with actual conditions, according to analysis result, the diameter d=0.2mm when capillary chamber 1, during serial-connection laminar flow length L capillaceous=30mm, in the present embodiment the axis profile figure of short capillary as shown in Figure 1, end view drawing as shown in Figure 2, its design parameter meets the following conditions:
D≥2mm；
l
1≥2mm；
l
2≥0.4mm。
Therefore, select the length l in capillary chamber 1
1=2mm; The diameter D=2mm of buffer cavity 2, the length l of buffer cavity 2
2=1mm; The quantity n=8 of short capillary.
And the seal groove 3 that seal ring is installed is arranged respectively on two end sections of short capillary; When 8 short capillary are cascaded, in sealing ring recess 3, load onto seal ring, play seal action.
The invention is not restricted to this embodiment, every mentality of designing of utilizing the design, the design of doing some simple change all should fall within protection scope of the present invention.
Claims (1)
1. design method of serial-connection laminar flow capillary, it is characterized in that: described serial-connection laminar flow capillary tube, be formed by connecting by n identical short capillary, n is a positive integer, and its design method comprises the quantity n of definite short capillary and the design parameter of definite short capillary;
Described short capillary is a kind of hollow tube, and thin in the middle of its internal diameter, two ends are thick, and middle thin part is called capillary chamber (1), and the thick part in two ends is called buffer cavity (2);
The design parameter of described short capillary comprises: the diameter d of capillary chamber (1), the length l of capillary chamber (1)
1The diameter D of buffer cavity (2), the length l of buffer cavity (2)
2These parameters satisfy formula 1 to formula 3:
D≥10×d； (1)
l
1≥10×d； (2)
l
2≥2×d (3)
Wherein, the diameter d of capillary chamber (1) is a known quantity;
The quantity n of described short capillary satisfies formula 4:
Wherein L is a serial-connection laminar flow length capillaceous, is known quantity;
The seal groove (3) that seal ring is installed is arranged respectively on two end sections of described short capillary; When n short capillary is cascaded, in sealing ring recess (3), load onto seal ring, play seal action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101789666A CN101858374B (en) | 2010-05-21 | 2010-05-21 | Design method of serial-connection laminar flow capillary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101789666A CN101858374B (en) | 2010-05-21 | 2010-05-21 | Design method of serial-connection laminar flow capillary |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858374A CN101858374A (en) | 2010-10-13 |
| CN101858374B true CN101858374B (en) | 2011-11-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101789666A Expired - Fee Related CN101858374B (en) | 2010-05-21 | 2010-05-21 | Design method of serial-connection laminar flow capillary |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423001B (en) * | 2015-11-27 | 2017-07-28 | 北京控制工程研究所 | A kind of capillary applied to single group member thruster |
| CN113340999B (en) * | 2021-07-12 | 2022-06-07 | 宁夏大学 | Ultrasonic C-scan water spray coupling laminar flow generation nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004251357A (en) * | 2003-02-19 | 2004-09-09 | Taiheiyo Seiko Kk | Tube material, expansion unit, and refrigerant circuit module |
| JP3668959B2 (en) * | 1998-07-14 | 2005-07-06 | 独立行政法人理化学研究所 | Micro liquid control mechanism |
| WO2007012803A1 (en) * | 2005-07-29 | 2007-02-01 | T I Group Automotive Systems Limited | Apparatus for use in a refrigeration unit |
| CN201100861Y (en) * | 2007-09-12 | 2008-08-13 | 辽宁大学 | Capillary weaving flow ratio color utensil |
-
2010
- 2010-05-21 CN CN2010101789666A patent/CN101858374B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3668959B2 (en) * | 1998-07-14 | 2005-07-06 | 独立行政法人理化学研究所 | Micro liquid control mechanism |
| JP2004251357A (en) * | 2003-02-19 | 2004-09-09 | Taiheiyo Seiko Kk | Tube material, expansion unit, and refrigerant circuit module |
| WO2007012803A1 (en) * | 2005-07-29 | 2007-02-01 | T I Group Automotive Systems Limited | Apparatus for use in a refrigeration unit |
| CN201100861Y (en) * | 2007-09-12 | 2008-08-13 | 辽宁大学 | Capillary weaving flow ratio color utensil |
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| CN101858374A (en) | 2010-10-13 |
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Granted publication date: 20111109 Termination date: 20120521 |