CN108760218B - Hinge connecting device for large-curvature thin-wall flexible plate of wind tunnel flexible wall spray pipe - Google Patents
Hinge connecting device for large-curvature thin-wall flexible plate of wind tunnel flexible wall spray pipe Download PDFInfo
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- CN108760218B CN108760218B CN201810494009.0A CN201810494009A CN108760218B CN 108760218 B CN108760218 B CN 108760218B CN 201810494009 A CN201810494009 A CN 201810494009A CN 108760218 B CN108760218 B CN 108760218B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Lining And Supports For Tunnels (AREA)
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Abstract
A hinge connection device for a large-curvature thin-wall flexible plate of a wind tunnel flexible wall spray pipe comprises a thin-wall flexible plate and a plurality of hinge devices, wherein the thin-wall flexible plate is provided with transverse ribs, the transverse rib and the thin-wall flexible plate are of an integrated structure, a guide groove is arranged in the middle of the upper surface of the horizontal part of the transverse rib, both sides of the guide groove of the transverse rib are provided with threaded through holes, the middle position of the bottom of the hinge seat is provided with a guide key, the thin-wall flexible plate hinge is characterized in that threaded through holes are formed in two sides of the guide key of the hinge seat, the guide key of the hinge seat is matched with the guide grooves of the transverse ribs, the positioning of the hinge seat and the transmission of the acting force between the thin-wall flexible plates are achieved, the hinge seat and the transverse ribs are fixedly connected through the threaded through holes by bolts.
Description
Technical Field
The invention belongs to the technical field of aviation aerodynamic wind tunnel tests, and particularly relates to a hinge connecting device for a large-curvature thin-wall flexible plate of a wind tunnel flexible wall spray pipe.
Background
The flexible wall spray pipe enables the flexible plates between the parallel fixed walls to form a required Mach number profile by driving the actuating mechanism, and is an important component for ensuring that a wind tunnel test section obtains uniform airflow with designed Mach number; the back airflow surface of the flexible plate is provided with a plurality of hinge seats connected with an actuating mechanism, the bending shape of the flexible plate is controlled by controlling the stroke of the actuating mechanism to be matched with the theoretical aerodynamic profile of the spray pipe, for the thinner flexible plate, a plurality of transverse ribs are usually arranged on the back airflow surface of the flexible plate so as to fix the hinge seats, the section of each rib is usually rectangular, and the connecting position of a rectangular rib plate and a thin-wall flexible plate can generate high stress, so that the fatigue life of the thin-wall flexible plate is reduced, and the use economy of a production type wind tunnel is influenced.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a hinge connecting device for a large-curvature thin-wall flexible plate of a wind tunnel flexible wall spray pipe.
The purpose of the invention is realized as follows:
a hinge connection device for a large-curvature thin-wall flexible plate of a wind tunnel flexible wall spray pipe comprises a thin-wall flexible plate and a plurality of hinge seats, wherein the thin-wall flexible plate is provided with a plurality of transverse ribs, a guide groove is formed in the middle of the upper surface of each transverse rib, a guide key is arranged in the middle of the bottom of each hinge seat, the guide keys and the guide grooves are mutually matched and connected, and the transverse ribs and the hinge seats are fixedly connected through bolts
The transverse ribs as described above are T-shaped.
Stress relief grooves are formed at the joints of the transverse ribs and the thin-wall flexible plates.
As mentioned above, the stress release groove is two arc surfaces, and each arc surface is respectively tangent with the thin-wall flexible plate and the transverse rib.
Compared with the prior art, the invention has the following effects and benefits: the device can effectively reduce the stress concentration condition at the connecting position of the transverse rib and the thin-wall flexible plate due to the abrupt change of the cross section, and reduce the abrupt change of the inertia moment of the cross section of the thin-wall flexible plate at the transverse rib, thereby improving the stress condition of the thin-wall flexible plate and improving the profile precision of the thin-wall flexible plate after deformation; and the positioning between the hinge seat and the thin-wall flexible plate and the transmission of the acting force are realized in the form of the guide key and the guide groove, the stress condition of the connecting bolt can be effectively improved, and the connection firmness between the thin-wall flexible plate and the hinge seat is improved.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The invention is further explained below by way of example according to the accompanying drawings of the description:
example 1
Referring to fig. 1, the hinge connection device for the large-curvature thin-wall flexible plate of the wind tunnel flexible wall nozzle comprises a thin-wall flexible plate 1 and two hinge bases, wherein 2 transverse ribs 3 are arranged on the thin-wall flexible plate 1, the transverse ribs and the flexible plate are of an integrally formed structure, a guide groove 5 is arranged in the middle of the upper surface of the horizontal part of each transverse rib 3, threaded through holes are respectively formed in two sides of each guide groove 5, a guide key 6 is arranged in the middle of the bottom of each hinge base 2, threaded through holes are respectively formed in two sides of each guide key 6, the guide keys 6 and the guide grooves 5 are mutually matched, the positioning of the hinge bases 2 and the transmission of the acting force between the thin-wall flexible plates 1 are realized, and the hinge bases 2 and the transverse ribs 3 are fixedly connected through. The transverse ribs 3 described in this embodiment are T-shaped. In this embodiment, a stress relief groove 4 is formed at a joint of the transverse rib 3 and the thin-wall flexible plate 1, the stress relief groove 4 is two arc surfaces, and each arc surface is tangent to the thin-wall flexible plate 1 and the transverse rib 3.
According to the invention, a plurality of transverse ribs 3 are processed on a thin-wall flexible plate 1, the height of each transverse rib 3 is as low as possible, and the width of a T-shaped vertical part of each transverse rib 3 is as narrow as possible, so that the sudden change of the section inertia moment of the thin-wall flexible plate 1 at the transverse rib 3 can be effectively reduced, a stress release groove 4 is processed at the connecting part of each transverse rib 3 and the thin-wall flexible plate 1, the stress release groove 4 adopts two sections of arc surface transition, the stress concentration condition of the thin-wall flexible plate 1 at the connecting position with each transverse rib 3 during large-curvature deformation can be effectively reduced, a guide groove 5 is processed at the middle position of the upper surface of the horizontal part of each transverse rib 3, a guide key 6 is processed at the middle position of the lower surface of each hinge seat 2, and each hinge seat 2 is connected with the thin-wall flexible plate 1 through a bolt.
Claims (3)
1. The utility model provides a wind-tunnel flexible wall spray tube large curvature thin wall flexible sheet hinge coupling device, includes thin wall flexible sheet (1) and a plurality of hinge seat (2) its characterized in that: the thin-wall flexible plate (1) is provided with a plurality of transverse ribs (3), the middle position of the upper surface of each transverse rib (3) is provided with a guide groove (5), the middle position of the bottom of the hinge seat (2) is provided with a guide key (6), the guide keys (6) and the guide grooves (5) are mutually matched and connected, and the transverse ribs (3) and the hinge seat (2) are fixedly connected through bolts; stress relief grooves (7) are formed in the connecting positions of the transverse ribs (3) and the thin-wall flexible plates (1).
2. The hinge connection device for the large-curvature thin-wall flexible plate of the wind tunnel flexible wall nozzle of claim 1, wherein: the transverse ribs (3) are T-shaped.
3. The hinge connection device for the large-curvature thin-wall flexible plate of the wind tunnel flexible wall nozzle of claim 1, wherein: the stress release groove (7) is two arc surfaces, and each arc surface is respectively tangent with the thin-wall flexible plate (1) and the transverse rib (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494009.0A CN108760218B (en) | 2018-05-22 | 2018-05-22 | Hinge connecting device for large-curvature thin-wall flexible plate of wind tunnel flexible wall spray pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494009.0A CN108760218B (en) | 2018-05-22 | 2018-05-22 | Hinge connecting device for large-curvature thin-wall flexible plate of wind tunnel flexible wall spray pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108760218A CN108760218A (en) | 2018-11-06 |
| CN108760218B true CN108760218B (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810494009.0A Active CN108760218B (en) | 2018-05-22 | 2018-05-22 | Hinge connecting device for large-curvature thin-wall flexible plate of wind tunnel flexible wall spray pipe |
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| CN (1) | CN108760218B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414198B (en) * | 2022-03-28 | 2022-05-27 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Driving device for large wind tunnel flexible wall spray pipe |
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| DE2941404B1 (en) * | 1979-10-12 | 1980-08-14 | Deutsche Forsch Luft Raumfahrt | Measurement section on wind tunnels |
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| JPH09113406A (en) * | 1995-10-24 | 1997-05-02 | Kobe Steel Ltd | Nozzle with variable mach number |
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| CN102152940B (en) * | 2011-01-28 | 2013-01-09 | 青岛华夏橡胶工业有限公司 | Conveyer belt of bucket elevator and method for forming joint part of conveyer belt |
| CN107336785A (en) * | 2017-07-31 | 2017-11-10 | 浙江春风动力股份有限公司 | All-terrain vehicle and its rear-mounted rocking arm mounting structure |
| CN107398674A (en) * | 2017-08-04 | 2017-11-28 | 广东省珠海工程勘察院 | A kind of filling concrete pile cages cage bar straight screw sleeve connects processing platform |
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| DE2941404B1 (en) * | 1979-10-12 | 1980-08-14 | Deutsche Forsch Luft Raumfahrt | Measurement section on wind tunnels |
| CN104384241A (en) * | 2014-10-17 | 2015-03-04 | 北京航天益森风洞工程技术有限公司 | Device for protecting flexible jet pipe profile from excessive deformation |
| CN104316287A (en) * | 2014-10-24 | 2015-01-28 | 中国人民解放军国防科学技术大学 | Two-dimensional variable-mach-number spray pipe and supersonic-velocity variable-mach-number wind tunnel using same |
| CN104655392A (en) * | 2015-02-13 | 2015-05-27 | 北京瑞赛长城航空测控技术有限公司 | Synchronous control system and method for all flexible plate nozzle of wind tunnel |
| CN106607484A (en) * | 2017-02-08 | 2017-05-03 | 吉林大学 | A roller type multi-section control section bar three-dimensional stretch-bending dieless forming device |
| CN107678387A (en) * | 2017-10-16 | 2018-02-09 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of high-precision adagio type face control system |
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| CN108760218A (en) | 2018-11-06 |
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