CN213748995U

CN213748995U - Testing instrument protection device used in hypersonic wind tunnel test section

Info

Publication number: CN213748995U
Application number: CN202023243450.3U
Authority: CN
Inventors: 贾广森; 文帅; 金鑫; 陈星�; 毕志献
Original assignee: China Academy of Aerospace Aerodynamics CAAA
Current assignee: China Academy of Aerospace Aerodynamics CAAA
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-07-20
Anticipated expiration: 2030-12-29

Abstract

The utility model provides a be used for inside test instrument protection device of hypersonic wind tunnel test section, including safety cover, telescopic link and cloud platform, wall connection in safety cover and the test section, the side of safety cover is equipped with the recess, the one end of telescopic link is passed the recess is located the inside of safety cover, the telescopic link is located the inside one end of safety cover is equipped with the cloud platform, be equipped with test instrument on the cloud platform, the telescopic link is connected with the bottom of vertical connecting rod, the top and the mount of vertical connecting rod are connected, the mount is fixed on the portal. The utility model can realize the installation of the testing instrument in the hypersonic wind tunnel test section, protect the testing instrument to finish the measurement of the model head stagnation point, and has simple structure and convenient adjustment; the test instrument is protected by the protective cover, so that the test instrument can be installed in the hypersonic wind tunnel test section, different angles can be rotated, and tests at different angles can be realized.

Description

Testing instrument protection device used in hypersonic wind tunnel test section

Technical Field

The utility model belongs to the technical field of the shooting platform technique and specifically relates to a be used for inside test instrument protection device of hypersonic wind tunnel test section.

Background

With the steady promotion of national major projects such as deep space exploration, manned lunar landing and the like, the thermal environment test of the appearance of the large blunt body re-entry capsule becomes more and more important, the heat map technology can obtain large-area heat flow data on the surface of the model under the condition of not damaging the appearance of the model, and the heat map technology has remarkable technical advantages. However, in the test process, a high-vacuum and strong-impact environment exists in the wind tunnel test section, so that the test instrument is easily damaged and cannot be used, and in the wind tunnel test process, the test instrument is easily vibrated due to the influence of airflow in the test section, so that the accuracy of a test result is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a test instrument protection device for hypersonic wind tunnel test section is inside can realize that test instrument in the inside installation of hypersonic wind tunnel test section, and protection test instrument accomplishes the measurement to model head stagnation point, simple structure, and the adjustment is convenient.

The utility model provides a be used for inside test instrument protection device of hypersonic wind tunnel test section, including safety cover, telescopic link and cloud platform, safety cover and test section inner wall connection, the side of safety cover is equipped with the recess, the one end of telescopic link is passed the recess is located the inside of safety cover, the telescopic link is located the inside one end of safety cover is equipped with the cloud platform, be equipped with test instrument on the cloud platform, the telescopic link is connected with the bottom of vertical connecting rod, the top and the mount of vertical connecting rod are connected, the mount is fixed on the portal.

Further, the portal includes crossbeam and montant, the both ends of crossbeam are equipped with respectively the montant. The portal uses square tubular product as basic component, adopts the design of dismantled and assembled gate-type structure, can satisfy the requirement that different scene space conditions change, also can be according to on-the-spot actual need, hangs to other storage positions.

Further, the fixing frame is fixed on the cross beam through bolts. The fixing frame is mounted through bolts, so that the fixing frame is convenient to dismount, and can move on the cross beam in a reciprocating mode, and the position of the holder is adjusted.

Furthermore, a locking buckle is arranged on the telescopic rod, and a damping material is arranged on the outer side of the telescopic rod. The telescopic link includes inner tube and outer tube, and the inner tube is in the same place with the outer tube muffjoint, and the inner tube can be at the intraductal indentation of outer tube or stretch out to it is fixed through locking the knot, the length of adjustment telescopic link, and then the position of control cloud platform need not to remove the portal, easy operation, and the telescopic link outside is equipped with common damping material, plays the effect of slow vibration.

Furthermore, one end, far away from the protective cover, of the telescopic rod is provided with a balancing weight, and the balancing weight is fixed on the telescopic rod through a bolt. The balancing weight is fixed by the bolts, so that the balancing weight can move on the telescopic rod in a reciprocating manner, and the position of the balancing weight can be adjusted according to the weight of a test instrument arranged on the holder, so that the telescopic rod is kept balanced.

Further, the cloud platform includes pivot and base, the one end of pivot with the telescopic link is connected, the other end of pivot with the bottom of base is connected, be equipped with on the base test instrument. The cradle head is positioned in the test section, so that the non-contact measurement of the test instrument on the model head stagnation point is realized, and the rotation of the test instrument at different angles is realized through the rotating shaft.

Further, the test instrument includes a high speed camera and an ultraviolet excitation light source. And the measurement of the model is realized through a high-speed camera and an ultraviolet excitation light source.

Further, a gap is reserved between the inner side of the protective cover and the holder. The testing instrument on the cradle head is not influenced by the vibration inside the testing section in the testing process, and the accuracy of the measuring structure is ensured.

Furthermore, be equipped with the observation window on the safety cover, be equipped with optical glass on the observation window, the observation window be located with the recess is relative one side. The observation window is used for shooting of the high-speed camera and transmission of the ultraviolet light source, and optical glass is arranged on the observation window to prevent air flow from entering the protective cover.

Further, the width of the groove is larger than that of the holder, and the height of the groove is larger than that of the test instrument. Ensure that the tripod head and the test instrument can pass through the groove and enter the inside of the protective cover.

Beneficial effects of the utility model

1. The utility model discloses can realize that testing instrument is at hypersonic wind tunnel test section internally mounted, protect testing instrument to accomplish the measurement to model head stagnation point, simple structure, the adjustment is convenient.

2. The utility model discloses a fixed test instrument of cloud platform to be connected through pivot and telescopic link, make test instrument realize the rotation of different angles, guarantee the visual angle of high-speed camera and ultraviolet source's the angle of shining, the position of the length control cloud platform of accessible adjustment telescopic link leaves the space between telescopic link and the safety cover recess, and the telescopic link outside is equipped with damping material, avoids the accuracy that safety cover vibration influences test instrument.

3. The utility model discloses a safety cover protection test instrument realizes the inside arrangement of test instrument in the test segment to be equipped with the observation window on the safety cover, accomplish the non-contact measurement to model head stagnation point, leave the clearance between the inboard of test instrument and safety cover, avoid receiving the influence of test segment internal vibration in the process of the test, ensure the accuracy of test result.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a top view of an embodiment of the invention;

fig. 3 is a front view of an embodiment of the present invention;

fig. 4 is a cross-sectional view of a protective cover in an embodiment of the invention;

fig. 5 is a structure diagram of the pan/tilt head in the embodiment of the present invention.

Description of reference numerals:

in the figure: 1-portal, 2-fixed frame, 3-vertical connecting rod, 4-protective cover, 5-telescopic rod, 6-counterweight, 7-observation window, 8-tripod head, 9-groove, 10-high speed camera, 11-ultraviolet excitation light source, 12-rotating shaft and 13-base.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 1 to 5:

a test instrument protection device for the interior of a hypersonic wind tunnel test section comprises a protection cover 4, a telescopic rod 5 and a tripod head 8, wherein the protection cover 4 is connected with the inner wall of the test section, a groove 9 is formed in the side surface of the protection cover 4, one end of the telescopic rod 5 penetrates through the groove 9 and is located in the protection cover 4, the telescopic rod 5 comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are connected in a sleeved mode, the inner pipe can retract or extend into the outer pipe and is fixed through a locking buckle, the length of the telescopic rod 5 is further adjusted, common vibration damping materials are arranged on the outer side of the telescopic rod 5 and play a role in damping, a gap is reserved between the telescopic rod 5 and the groove 9 to ensure that vibration in the test section does not affect the telescopic rod 5 in the test process, the tripod head 8 is arranged at one end of the telescopic rod 5, which is located in the protection cover 4, the position of the tripod head 8 can be controlled by adjusting the length of the telescopic rod 5, and a gap is reserved between the tripod head 8 and the inner side of the protection cover 4, avoid receiving the influence of the inside vibration of test section in the testing process, the width of recess 9 is greater than the width of cloud platform 8.

Cloud platform 8 includes pivot 12 and base 13, the one end of pivot 12 is connected with telescopic link 5, the other end of pivot 12 is connected with the bottom of base 13, be equipped with test instrument on base 13, test instrument includes high-speed camera 10 and ultraviolet excitation light source 11, base 13 can realize the rotation of different angles through pivot 12, and then drive high-speed camera 10 and ultraviolet excitation light source 11 and rotate, ensure high-speed camera 10's visual angle and the irradiation angle of ultraviolet excitation light source 11, be equipped with observation window 7 on the safety cover 4, be equipped with optical glass on the observation window 7, prevent that the air current from getting into the inside of safety cover 4, observation window 7 is located the one side relative with recess 9, a transmission for high-speed camera 10's shooting and ultraviolet excitation light source 11, accomplish the non-contact measurement to model head point, recess 9 highly is greater than test instrument's height.

One end that safety cover 4 was kept away from to telescopic link 5 is equipped with balancing weight 6, is equipped with the through-hole on balancing weight 6, and balancing weight 6 passes through the bolt fastening on telescopic link 5, and balancing weight 6 can be on telescopic link 5 reciprocating motion, according to the position of the weight adjustment balancing weight 6 of the last tester of cloud platform 8 to through the bolt fastening, make telescopic link 5 keep balance. The telescopic rod 5 is connected with the bottom end of the vertical connecting rod 3, the top end of the vertical connecting rod 3 is connected with the bottom of the fixing frame 2, the fixing frame 2 is fixed on the door frame 1, the door frame 1 is a door frame support and comprises a cross beam and vertical rods, two ends of the cross beam are respectively connected with the vertical rods, the two vertical rods are respectively fixed on the ground, the door frame 1 is formed by square pipes and is of a detachable door structure, the requirements of different site space conditions can be met, meanwhile, the door frame is convenient to hang to other storage positions, the fixing frame 2 is fixed on the cross beam of the door frame 1 through bolts, the reciprocating movement can be carried out on the cross beam, the position of the cloud deck 8 is further controlled, and the door frame 1 does not need to be moved.

Adopt the technical scheme of the utility model, simple structure, the adjustment is convenient. The gantry is of a detachable gantry structure, so that the requirement of different site space condition changes can be met, and the tripod can be hung to other storage positions according to the actual site requirement; through installing high-speed camera and ultraviolet excitation light source on the cloud platform, and set up the cloud platform in the inside of protecting cover, realize the installation at the inside high-speed camera of test section and ultraviolet excitation light source, and the cloud platform can realize the rotation of different angles, the visual angle of high-speed camera and the irradiation angle of ultraviolet excitation light source have been guaranteed, and be equipped with the observation window on protecting the cover, realize the non-contact measurement to model head stagnation point, leave the clearance between the inboard of protecting cover and the cloud platform, avoid in the testing process, high-speed camera and ultraviolet excitation light source receive the influence of the inside vibration of test section, ensure the accuracy that high-speed camera shot and ultraviolet excitation light source propagated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a test instrument protection device that is used for inside hypersonic wind tunnel test section which characterized in that: including safety cover, telescopic link and cloud platform, safety cover and experimental section inner wall connection, the side of safety cover is equipped with the recess, the one end of telescopic link is passed the recess is located the inside of safety cover, the telescopic link is located the inside one end of safety cover is equipped with the cloud platform, be equipped with test instrument on the cloud platform, the telescopic link is connected with the bottom of vertical connecting rod, the top and the mount of vertical connecting rod are connected, the mount is fixed on the portal.

2. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the portal frame comprises a cross beam and a vertical rod, and the vertical rod is arranged at two ends of the cross beam respectively.

3. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 2, wherein: the fixed frame is fixed on the cross beam through bolts.

4. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the telescopic rod is provided with a locking buckle, and the outer side of the telescopic rod is provided with a vibration damping material.

5. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the telescopic link is kept away from the one end of safety cover is equipped with the balancing weight, the balancing weight passes through the bolt fastening on the telescopic link.

6. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the cloud platform includes pivot and base, the one end of pivot with the telescopic link is connected, the other end of pivot with the bottom of base is connected, be equipped with on the base test instrument.

7. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the test instrument comprises a high-speed camera and an ultraviolet excitation light source.

8. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: a gap is reserved between the inner side of the protective cover and the holder.

9. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the protective cover is provided with an observation window, the observation window is provided with optical glass, and the observation window is positioned on one side opposite to the groove.

10. The protection device for the test instrument in the hypersonic wind tunnel test section according to claim 1, wherein: the width of the groove is larger than that of the holder, and the height of the groove is larger than that of the test instrument.