CN111307403A - Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel - Google Patents
Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel Download PDFInfo
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- CN111307403A CN111307403A CN202010309997.4A CN202010309997A CN111307403A CN 111307403 A CN111307403 A CN 111307403A CN 202010309997 A CN202010309997 A CN 202010309997A CN 111307403 A CN111307403 A CN 111307403A
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- wind tunnel
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- 239000002893 slag Substances 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 claims description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 241000446313 Lamella Species 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001066 destructive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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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
-
- 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
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- General Physics & Mathematics (AREA)
- Particle Accelerators (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a plate-type diaphragm slag breaking baffle plate installed on a vacuum pipe section of a pulse wind tunnel. The plate-type diaphragm slag-crushing baffle comprises an impact plate, a support fork, an upper limiting plate, a lower limiting plate and an elastic pull rope, and is installed at the tail end of a vacuum pipe section of a wind tunnel. During the wind tunnel test, when there is the diaphragm disintegrating slag or when falling the lamella in the experimental air current, the diaphragm disintegrating slag of high-speed motion or fall the lamella and strike the striking plate at first, under the effort of diaphragm disintegrating slag or falling the lamella, the striking plate can rotate along vertical pivot, and the elasticity stay cord is elongated, and the elastic force of production has avoided the direct internal face that strikes the vacuum tube section of striking plate, and simultaneously, the rubber piece of bonding fixing on the striking plate also can alleviate the destructive action of striking plate to the vacuum tube section. After the test is finished, the impact plate can realize automatic reset under the acting force of the elastic pull rope. The plate-type diaphragm disintegrating slag baffle is simple and reliable in structure, does not need to be operated and reset by workers, and can effectively prevent diaphragm disintegrating slag or a valve from damaging the closed end of the vacuum tube.
Description
Technical Field
The invention belongs to the field of pulse wind tunnel equipment, and particularly relates to a plate-type diaphragm slag breaking baffle plate installed on a vacuum pipe section of a pulse wind tunnel.
Background
In shock tunnel type pulse equipment, a diaphragm is generally used for separating different sections of a wind tunnel, when a wind tunnel test is carried out, a high-pressure section and a low-pressure section of the wind tunnel are respectively filled with gases with different pressures, shock waves are generated at the diaphragm after the diaphragm is broken under the action of the high-pressure gas, the shock waves compress the test gas in the low-pressure section to form high-temperature high-pressure test gas, and the test gas enters a spray pipe to expand to form test gas flow after breaking the diaphragm.
The diaphragm of the high-pressure section of the wind tunnel is made of metal or polyester fiber materials generally. The metal diaphragm may generate slag and large flap during the tearing process by the high-pressure airflow. The polyester fiber film is vaporized after being melted by high-temperature gas, but the problem of incomplete vaporization often exists, and slag is also generated. The crushed slag or the falling flaps reach the vacuum pipe section along with the high-speed airflow and finally impact the closed end of the vacuum pipe section, and the crushed slag or the falling flaps are easy to damage parts such as a vacuum pipe or a valve and the like due to high speed of the crushed slag or the falling flaps.
M.s.holden, j.harvey, m.maclean et al, in "Development and Application of an new group Test Capability to product Full-Scale screen reduction and Stage separation coatings with doubled height Conditions" (AIAA 2005-.
Currently, the development of a special diaphragm slag baffle for a pulse wind tunnel is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a plate-type diaphragm slag breaking baffle plate arranged on a vacuum pipe section of a pulse wind tunnel.
The invention relates to a plate-type diaphragm slag breaking baffle arranged on a vacuum pipe section of a pulse wind tunnel, which is characterized in that the plate-type diaphragm slag breaking baffle comprises an impact plate, a support fork, an upper limiting plate, a lower limiting plate and an elastic pull rope;
the vacuum pipe section is fixedly supported on the ground through a serial base, the vacuum pipe section is a circular pipe with one open end and the other closed end, and the open end is connected with the downstream end of the pulse wind tunnel test section; a mounting seat fixed at the lowest part of the lower wall surface of the vacuum pipe section is arranged in the vacuum pipe section at a position corresponding to the base, and a corresponding mounting seat is arranged at the highest part of the upper wall surface of the vacuum pipe section;
the striking plate is a vertical circular metal plate, symmetrical annular reinforcing ribs are fixed on the circumferential edges of the front side surface and the rear side surface of the vertical circular metal plate, and symmetrical vertical reinforcing ribs are fixed on the vertical center lines of the front side surface and the rear side surface of the vertical circular metal plate; the radius of the annular reinforcing rib is smaller than that of the vacuum pipe section; a crescent metal plate which is in equal thickness symmetry with the vertical circular metal plate in the same plane is fixed on the annular reinforcing rib, and a rubber block is coated at the vertex position of the outer edge of the crescent metal plate; a rope hanging ring I is fixed at the horizontal position of the annular reinforcing rib, a rope hanging ring II corresponding to the rope hanging ring I is fixed on the inner wall surface of the vacuum pipe section, two symmetrical elastic pull ropes are arranged between the rope hanging ring I and the rope hanging ring II, the stretched length of the elastic pull ropes can enable two rubber blocks on the impact plate to contact the inner wall surface of the vacuum pipe section, and meanwhile, under the condition that the elastic pull ropes are not stressed, the included angle between the impact plate and the axis of the vacuum pipe section can be an acute angle;
one end of each support fork is a cylindrical end, the other end of each support fork is a fork-shaped end, and the two support forks are symmetrically clamped at the upper vertex and the lower vertex of the impact plate through the fork-shaped ends; the cylindrical end of the supporting fork at the upper vertex is sleeved with a gasket and a roller bearing, the cylindrical end of the supporting fork at the upper vertex is fixed on the mounting seat on the upper wall surface through two L-shaped upper limiting plates which are butted, the horizontal section of each upper limiting plate is provided with a through hole, and the vertical section of each upper limiting plate is provided with a semi-cylindrical groove assembled with the roller bearing; the cylindrical end of the support fork at the lower vertex is sleeved with a gasket and a thrust bearing, the cylindrical end of the support fork at the lower vertex is fixed on the lower wall surface mounting seat through two butted linear lower limiting plates, the lower limiting plates are provided with through holes, and the end heads of the lower limiting plates are provided with semi-cylindrical grooves assembled with the cylindrical end of the support fork; the upper limiting plate is fixed on the upper wall surface mounting seat through bolts penetrating through the through holes, and the lower limiting plate is fixed on the lower wall surface mounting seat through bolts penetrating through the through holes.
The sum of the width of the crescent metal plate and the radius of the impact plate is 0.1-0.5 m larger than the radius of the vacuum pipe section, and the radius of the impact plate is 0.2-0.5 m smaller than the radius of the vacuum pipe section.
The rubber block is fixedly bonded at the vertex position of the outer edge of the crescent metal plate.
The impact plate in the plate-type diaphragm slag baffle arranged in the vacuum pipe section of the pulse wind tunnel rotates along the vertical axis under the impact action of test airflow and diaphragm slag or a falling flap, has the effects of blocking the diaphragm slag or the falling flap and reducing the impact of the diaphragm slag or the falling flap, avoids the damage of the diaphragm slag or the falling flap on the closed end of the vacuum pipe, and automatically returns under the action of the elastic pull rope after the test is finished.
The roller bearing and the thrust bearing which are arranged in the plate-type diaphragm slag breaking baffle plate of the vacuum pipe section of the pulse wind tunnel can realize the effect that the impact plate rotates around a vertical central axis under the action of diaphragm slag breaking or valve dropping impact, and the thrust bearing also has the effect of supporting the weight of the impact plate.
The plate-type diaphragm slag breaking baffle arranged on the vacuum pipe section of the pulse wind tunnel is simple and reliable in structure, does not need to be operated and reset by workers, and can effectively prevent the diaphragm slag breaking or valve dropping from damaging the closed end of the vacuum pipe.
Drawings
FIG. 1 is a view perpendicular to the direction of airflow of a plate-type diaphragm slag baffle installed on a vacuum pipe section of a pulse wind tunnel according to the invention;
FIG. 2 is a sectional lower view of the plate-type diaphragm slag baffle of the present invention installed in a vacuum pipe section of a pulse wind tunnel, taken along the horizontal plane;
FIG. 3 is a longitudinal symmetrical plane sectional view of the plate-type diaphragm slag-breaking baffle installed in a vacuum pipe section of a pulse wind tunnel according to the invention;
FIG. 4 is an enlarged view of a portion of FIG. 2 at I;
FIG. 5 is an enlarged view of a portion of FIG. 3 at II;
FIG. 6 is an enlarged view of a portion of FIG. 3 at III;
FIG. 7 is a perspective view of an impact plate of the present invention mounted in a plate-type diaphragm debris baffle of a vacuum duct section of a pulsed wind tunnel;
FIG. 8 is a perspective view of a support fork of the present invention mounted in a plate-type diaphragm debris baffle of a vacuum tube section of a pulsed wind tunnel;
FIG. 9 is a perspective view of an upper limiting plate of the plate-type diaphragm slag baffle of the invention installed in a vacuum tube section of a pulsed wind tunnel;
FIG. 10 is a perspective view of a lower limiting plate of the plate-type diaphragm slag baffle installed in a vacuum pipe section of a pulse wind tunnel according to the present invention.
In the figure, 1, an impact plate 2, a support fork 3, a mounting seat 4, a vacuum pipe section 5, a base 6, an upper limiting plate 7, a roller bearing 8, a lower limiting plate 9, a thrust bearing 10, a rubber block 11, an annular reinforcing rib 12, an elastic pull rope 13, a hanging rope ring II 14, a hanging rope ring I15, a washer 16 and a vertical reinforcing rib are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 7, the plate-type diaphragm slag breaking baffle provided in the vacuum pipe section of the impulse wind tunnel of the invention comprises an impact plate 1, a support fork 2, an upper limiting plate 6, a lower limiting plate 8 and an elastic pull rope 12;
the vacuum pipe section 4 is fixedly supported on the ground through a tandem base 5, the vacuum pipe section 4 is a circular pipe with one open end and the other closed end, and the open end is connected with the downstream end of the pulse wind tunnel test section; a mounting seat 3 fixed at the lowest part of the lower wall surface of the vacuum pipe section 4 is arranged in the vacuum pipe section 4 at a position corresponding to the base 5, and a corresponding mounting seat 3 is arranged at the highest part of the upper wall surface of the vacuum pipe section 5;
the impact plate 1 is a vertical circular metal plate, symmetrical annular reinforcing ribs 11 are fixed on the circumferential edges of the front side surface and the rear side surface of the vertical circular metal plate, and symmetrical vertical reinforcing ribs 16 are fixed on the vertical center lines of the front side surface and the rear side surface of the vertical circular metal plate; the radius of the annular reinforcing rib 11 is smaller than that of the vacuum pipe section 4; a crescent metal plate which is in equal thickness symmetry with the vertical circular metal plate in the same plane is fixed on the annular reinforcing rib 11, and the top point of the outer edge of the crescent metal plate is coated with a rubber block 10; a hanging rope ring I14 is fixed at the horizontal position of the annular reinforcing rib 11, a hanging rope ring II 13 corresponding to the hanging rope ring I14 is fixed on the inner wall surface of the vacuum pipe section 4, two symmetrical elastic pull ropes 12 are installed between the hanging rope ring I14 and the hanging rope ring II 13, the length of the stretched elastic pull ropes 12 can enable two rubber blocks 10 on the impact plate 1 to contact the inner wall surface of the vacuum pipe section 4, and meanwhile, under the condition that the elastic pull ropes 12 are not stressed, the included angle between the axes of the impact plate 1 and the vacuum pipe section 4 can be an acute angle;
as shown in fig. 8, one end of each support fork 2 is a cylindrical end, the other end of each support fork 2 is a fork-shaped end, two support forks 2 are arranged, and the support forks 2 are symmetrically clamped at the upper vertex and the lower vertex of the impact plate 1 through the fork-shaped ends; the cylindrical end of the supporting fork 2 at the upper vertex is sleeved with a gasket 15 and a roller bearing 7, the cylindrical end of the supporting fork 2 at the upper vertex is fixed on the upper wall surface mounting seat 3 through two L-shaped upper limiting plates 6 which are butted as shown in figure 9, the horizontal section of the upper limiting plate 6 is provided with a through hole, and the vertical section of the upper limiting plate 6 is provided with a semi-cylindrical groove which is assembled with the roller bearing 7; the cylindrical end of the support fork 2 at the lower vertex is sleeved with a gasket 15 and a thrust bearing 9, the cylindrical end of the support fork 2 at the lower vertex is fixed on the lower wall surface mounting seat 3 through two butted linear lower limiting plates 8 as shown in figure 10, the lower limiting plates 8 are provided with through holes, and the end head of the lower limiting plate 8 is provided with a semi-cylindrical groove assembled with the cylindrical end of the support fork 2; the upper limiting plate 6 is fixed on the upper wall surface mounting seat 3 through bolts penetrating through holes, and the lower limiting plate 8 is fixed on the lower wall surface mounting seat 3 through bolts penetrating through holes.
The sum of the width of the crescent metal plate and the radius of the impact plate 1 is 0.1-0.5 m larger than the radius of the vacuum pipe section 4, and the radius of the impact plate 1 is 0.2-0.5 m smaller than the radius of the vacuum pipe section 4.
The rubber block 10 is fixedly bonded at the vertex position of the outer edge of the crescent-shaped metal plate.
Example 1
The working process of the plate-type diaphragm slag breaking baffle arranged on the vacuum pipe section of the pulse wind tunnel is as follows:
during the wind tunnel test, when there is the diaphragm disintegrating slag or falls the lamella in the experimental air current, the diaphragm disintegrating slag of high-speed motion or fall the lamella and strike impact plate 1 at first on, under the effort of diaphragm disintegrating slag or falling the lamella, impact plate 1 can be followed the vertical pivot that forms between the support fork 2 at last summit and the support fork 2 at lower summit and rotated, elasticity stay cord 12 is elongated, the elastic force of production has avoided impact plate 1 directly to strike the internal face of vacuum tube section 4, simultaneously, the rubber block 10 of bonding fixing on impact plate 1 also can alleviate impact plate 1 to the devastation of vacuum tube section 4. After the test is finished, the impact plate 1 can automatically reset under the acting force of the elastic pull rope 12.
Claims (3)
1. A plate-type diaphragm slag breaking baffle arranged on a vacuum pipe section of a pulse wind tunnel is characterized by comprising an impact plate (1), a supporting fork (2), an upper limiting plate (6), a lower limiting plate (8) and an elastic pull rope (12);
the vacuum pipe section (4) is fixedly supported on the ground through a tandem base (5), the vacuum pipe section (4) is a circular pipe with one open end and the other closed end, and the open end is connected with the downstream end of the pulse wind tunnel test section; a mounting seat (3) fixed at the lowest part of the lower wall surface of the vacuum pipe section (4) is arranged in the vacuum pipe section (4) at a position corresponding to the base (5), and a corresponding mounting seat (3) is arranged at the highest part of the upper wall surface of the vacuum pipe section (5);
the impact plate (1) is a vertical circular metal plate, symmetrical annular reinforcing ribs (11) are fixed on the circumferential edges of the front side surface and the rear side surface of the vertical circular metal plate, and symmetrical vertical reinforcing ribs (16) are fixed on the vertical center lines of the front side surface and the rear side surface of the vertical circular metal plate; the radius of the annular reinforcing rib (11) is smaller than that of the vacuum pipe section (4); a crescent metal plate which is in equal thickness symmetry with the vertical circular metal plate in the same plane is fixed on the annular reinforcing rib (11), and the top point of the outer edge of the crescent metal plate is coated with a rubber block (10); a hanging rope ring I (14) is fixed at the horizontal position of the annular reinforcing rib (11), a hanging rope ring II (13) corresponding to the hanging rope ring I (14) is fixed on the inner wall surface of the vacuum pipe section (4), two symmetrical elastic pull ropes (12) are installed between the hanging rope ring I (14) and the hanging rope ring II (13), the stretched length of the elastic pull ropes (12) can enable two rubber blocks (10) on the impact plate (1) to be in contact with the inner wall surface of the vacuum pipe section (4), and meanwhile, under the condition that the elastic pull ropes (12) are not stressed, an included angle between the axes of the impact plate (1) and the vacuum pipe section (4) is an acute angle;
one end of each support fork (2) is a cylindrical end, the other end of each support fork (2) is a fork-shaped end, the two support forks (2) are symmetrically clamped at the upper vertex and the lower vertex of the impact plate (1) through the fork-shaped ends; a gasket (15) and a roller bearing (7) are sleeved at the cylindrical end of the supporting fork (2) at the upper vertex, the cylindrical end of the supporting fork (2) at the upper vertex is fixed on the upper wall surface mounting seat (3) through two L-shaped upper limiting plates (6) which are butted, a through hole is formed in the horizontal section of the upper limiting plate (6), and a semi-cylindrical groove assembled with the roller bearing (7) is formed in the vertical section of the upper limiting plate (6); a gasket (15) and a thrust bearing (9) are sleeved at the cylindrical end of the support fork (2) at the lower vertex, the cylindrical end of the support fork (2) at the lower vertex is fixed on the lower wall surface mounting seat (3) through two butted linear lower limiting plates (8), the lower limiting plates (8) are provided with through holes, and the end of each lower limiting plate (8) is provided with a semi-cylindrical groove assembled with the cylindrical end of the support fork (2); the upper limiting plate (6) is fixed on the upper wall surface mounting seat (3) through bolts penetrating through holes, and the lower limiting plate (8) is fixed on the lower wall surface mounting seat (3) through bolts penetrating through holes.
2. The plate-type diaphragm slag breaking baffle plate installed on the vacuum pipe section of the pulse wind tunnel according to claim 1, wherein the sum of the width of the crescent-shaped metal plate and the radius of the impact plate (1) is 0.1-0.5 m larger than the radius of the vacuum pipe section (4), and the radius of the impact plate (1) is 0.2-0.5 m smaller than the radius of the vacuum pipe section (4).
3. The plate-type diaphragm slag baffle installed on the vacuum pipe section of the pulse wind tunnel according to claim 1, wherein the rubber block (10) is fixedly bonded at the vertex position of the outer edge of the crescent-shaped metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309997.4A CN111307403B (en) | 2020-04-20 | 2020-04-20 | Plate type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309997.4A CN111307403B (en) | 2020-04-20 | 2020-04-20 | Plate type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
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| CN111307403A true CN111307403A (en) | 2020-06-19 |
| CN111307403B CN111307403B (en) | 2024-03-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307402A (en) * | 2020-04-20 | 2020-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN112229595A (en) * | 2020-11-06 | 2021-01-15 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for improving local vacuum degree of pulse wind tunnel |
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| US5452609A (en) * | 1992-05-06 | 1995-09-26 | European Transonic Windtunnel Gmbh | Wind tunnel having substantially planar wall portions and slots |
| CN103115745A (en) * | 2013-01-17 | 2013-05-22 | 中国科学院力学研究所 | Hanging pendulum type impact buffer device of hypersonic velocity shock wave wind tunnel |
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| CN211527771U (en) * | 2020-04-20 | 2020-09-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
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2020
- 2020-04-20 CN CN202010309997.4A patent/CN111307403B/en active Active
Patent Citations (6)
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| US5452609A (en) * | 1992-05-06 | 1995-09-26 | European Transonic Windtunnel Gmbh | Wind tunnel having substantially planar wall portions and slots |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307402A (en) * | 2020-04-20 | 2020-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN111307402B (en) * | 2020-04-20 | 2024-04-05 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
| CN112229595A (en) * | 2020-11-06 | 2021-01-15 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for improving local vacuum degree of pulse wind tunnel |
| CN112229595B (en) * | 2020-11-06 | 2024-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for improving local vacuum degree of pulse wind tunnel |
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| CN111307403B (en) | 2024-03-26 |
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