CN2658734Y - Device for lowering incident shock strength used in shock tube - Google Patents
Device for lowering incident shock strength used in shock tube Download PDFInfo
- Publication number
- CN2658734Y CN2658734Y CN 03209202 CN03209202U CN2658734Y CN 2658734 Y CN2658734 Y CN 2658734Y CN 03209202 CN03209202 CN 03209202 CN 03209202 U CN03209202 U CN 03209202U CN 2658734 Y CN2658734 Y CN 2658734Y
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- CN
- China
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- section
- pipe body
- screen cloth
- shock
- driven
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- Expired - Fee Related
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Abstract
The utility model relates to a device suitable in the shock tube in order to lower the strength of the reflected shock wave and consists of a pipe body of a driving section, a metal diaphragm and a pipe body of a driven section, wherein the metal diaphragm is clamped between the pipe body of the driving section and the pipe body of the driven section, and the metal diaphragm, the pipe body of the driving section and the pipe body of the driven section are fixed together through a bolt and flanges of the pipe body of the driving section and the pipe body of the driven section. The utility model is characterized in that the pipe body of the driven section is divided into two sections; a port of each section is welded with a flange. An elastic washer and a screen cloth are equipped between two flanges in the same sections; the elastic washer and the screen cloth are fixed by passing the bolt through a screw hole on the flange of the pipe body of the driven section. The utility mode can cause a local energy loss by inserting the mesh cloth in the lower-pressure section at the downstream of the shock wave diaphragm when the air current is flowed into the mesh cloth and is exposed to the damping action of the mesh cloth, thereby playing a role of attenuating the reflected shock wave strength.
Description
Technical field
The utility model relates to the diaphragm structure that uses in a kind of shock tube, particularly relates to a kind of device that reduces incident shock intensity in the shock tube that is applicable to.
Background technology
The device of the reduction incident shock intensity that common shock tube uses is a kind of metallic membrane, the centre of this diaphragm is provided with the groove of cross, when when testing, this metallic membrane is subjected to incident shock and impacts the metallic membrane explosion, thereby reaches experimental requirements.To be used for low pressure sensor timing signal requirement incident shock intensity extremely low but when shock tube, driving pressure is suitable with the section of being driven district gaseous tension in this case, so require very thin diaphragm, under the prior art condition, be difficult to the diaphragm that finds thickness suitable, promptly be difficult to obtain extremely low demarcation state, can not satisfy the requirement of scientific experiment out and away.
Summary of the invention
The purpose of this utility model is: the device that overcomes the reduction incident shock intensity of using in the existing shock tube is a diaphragm, it is very thin that diaphragm thickness can not be done again, and the defective that can not satisfy the demand, thereby provide a kind of screen device that reduces incident shock intensity in the shock tube that is applicable to.
The device that is applicable to reduction incident shock intensity in the shock tube that the utility model provides, comprise: drive section body 1, metallic membrane 2 and the section of being driven body 3, wherein drive folder one metallic membrane 2 between section body 1 and the section of the being driven body 3, and turn blue with the section of being driven body 3 three is fixed together by driving section body 1 with bolt 7; It is characterized in that: the section of being driven body 3 is divided into two sections, and every section port all is welded with to turn blue and 6, two turns blue and with the cross section one elastic washer 4 and a screen cloth 5 are installed in the middle of 6, penetrates the screw that the section of being driven body 3 turns blue on 6 by bolt 7 and is fixed (as shown in Figure 2).
Described screen cloth is identical with the section of being driven body 3 diameters, and the negotiable area of its screen cloth accounts for more than 50%.
Described screen cloth is the diameter of 2-3 times of screen cloth apart from the distance of metallic membrane.
The well-known damping that is subjected to screen cloth when the airflow passes screen cloth can cause local energy loss.After in the low pressure stage in shock tube diaphragm downstream, inserting screen cloth, can play the effect of decay incident shock intensity.Thereby can under not too low drive pressure ratio, obtain lower demarcation state.For example working as initial incident shock is M
s=1.25 o'clock, M behind screen cloth
sValue can reduce by 7%, inserts screen cloth and reduce incident shock intensity widely in shock tube.
Description of drawings
Fig. 1 is conventional shock tube structural representation
The apparatus structure synoptic diagram of Fig. 2 reduction incident shock of the present utility model intensity
Fig. 3 mesh structure synoptic diagram of the present utility model
Fig. 4 device diagrammatic cross-section of the present utility model
Drawing is described as follows:
1-drives the section body body 2-metal film 3-section of being driven body
4-elastic washer 5-screen cloth 6-turns blue
The 7-bolt
Embodiment
Referring to Fig. 2 and 4, the device that is applicable to reduction incident shock intensity in the shock tube of present embodiment, comprise: drive section body 1, metallic membrane 2 and the section of being driven body 3, wherein drive folder one metallic membrane 2 between section body 1 and the section of the being driven body 3, and turn blue the three is fixed together by driving section body 1 and the section of being driven body 3 with bolt; The section of being driven body 3 is divided into two sections, behind metallic membrane 2, the port of the every section section of being driven body 3 all is welded with and turns blue 6, lay the plastic washers 4 of a ф 100mm and the screen cloth 5 (as shown in Figure 3) of a ф 100mm in the middle of the two sections section of being driven bodys 3 turn blue, penetrate the screw that the section of being driven body 3 turns blue on 6 by bolt 7 and be fixed (as shown in Figure 2).Described screen cloth 5 is identical with the section of being driven body 3 diameters, and screen cloth 5 negotiable areas account for 50%.It is the 200mm place that screen cloth 5 is installed in the section of being driven body 3 middle distance metallic membranes.
Claims (3)
1. one kind is applicable to the device that reduces incident shock intensity in the shock tube, comprise: drive section body (1), metallic membrane (2) and the section of being driven body (3), wherein drive folder one metallic membrane (2) between section body (1) and the section of the being driven body (3), and turn blue by driving section body (1) and the section of being driven body (3) with bolt the three is fixed together; It is characterized in that: the section of being driven body (3) is divided into two sections, every section port all is welded with turn blue (6), two turn blue installs an elastic washer (4) and a screen cloth (5) with the cross section in the middle of (6), penetrates the screw that the section of being driven body (3) turns blue on (6) by bolt (7) and is fixed.
2. by the described device that reduces incident shock intensity in the shock tube that is applicable to of claim 1, it is characterized in that: described screen cloth (5) is identical with the section of being driven body (3) diameter, and the negotiable area of its screen cloth (5) accounts for 50%.
3. by the described device that reduces incident shock intensity in the shock tube that is applicable to of claim 1, it is characterized in that: described screen cloth (5) is the diameter of 2-3 times of screen cloth (5) apart from the distance of metallic membrane (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209202 CN2658734Y (en) | 2003-09-08 | 2003-09-08 | Device for lowering incident shock strength used in shock tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209202 CN2658734Y (en) | 2003-09-08 | 2003-09-08 | Device for lowering incident shock strength used in shock tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2658734Y true CN2658734Y (en) | 2004-11-24 |
Family
ID=34325046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03209202 Expired - Fee Related CN2658734Y (en) | 2003-09-08 | 2003-09-08 | Device for lowering incident shock strength used in shock tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2658734Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
-
2003
- 2003-09-08 CN CN 03209202 patent/CN2658734Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384834A (en) * | 2011-08-10 | 2012-03-21 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
| CN102384834B (en) * | 2011-08-10 | 2014-06-04 | 中国科学院力学研究所 | Detonation-driving shock tunnel explosive discharge device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |