CN111307403B - Plate type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section - Google Patents
Plate type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section Download PDFInfo
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- CN111307403B CN111307403B CN202010309997.4A CN202010309997A CN111307403B CN 111307403 B CN111307403 B CN 111307403B CN 202010309997 A CN202010309997 A CN 202010309997A CN 111307403 B CN111307403 B CN 111307403B
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- 239000002893 slag Substances 0.000 title claims abstract description 40
- 239000002184 metal Substances 0.000 claims description 26
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000035939 shock Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000000903 blocking effect Effects 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
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- 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 crushing baffle plate arranged on a vacuum pipe section of a pulse wind tunnel. The plate type diaphragm slag crushing baffle comprises an impact plate, a supporting fork, an upper limiting plate, a lower limiting plate and an elastic pull rope, and is arranged at the tail end of a vacuum pipe section of a wind tunnel. When the test airflow has diaphragm slag or valve falling, the diaphragm slag or valve falling in high speed moves to the impact plate, the impact plate rotates along the vertical rotating shaft under the action force of the diaphragm slag or valve falling, the elastic pull rope is lengthened, the generated elastic force avoids the impact plate to directly impact the inner wall surface of the vacuum pipe section, and meanwhile, the rubber block adhered and fixed on the impact plate can also lighten the damage effect of the impact plate to the vacuum pipe section. After the test is finished, the impact plate can automatically reset under the acting force of the elastic pull rope. The plate type diaphragm slag baffle is simple and reliable in structure, does not need operation and resetting of staff, and can effectively prevent damage of diaphragm slag or falling petals to 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 crushing baffle arranged 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 wind tunnel tests are carried out, gas with different pressures is respectively filled in a high-pressure section and a low-pressure section of the wind tunnel, after the diaphragm breaks under the action of the high-pressure gas, shock waves are generated at the diaphragm, test gas in the low-pressure section is compressed by the shock waves to form high-temperature high-pressure test gas, and after the test gas breaks through the diaphragm, the test gas enters a spray pipe to expand to form test gas flow.
The diaphragm of the high-pressure section of the wind tunnel is generally made of metal or polyester fiber materials. During the tearing process of the metal film sheet by the high-pressure air flow, slag can be generated, and larger valve falling can be generated. 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 slag or the fallen leaves reach the vacuum pipe section along with high-speed airflow and finally can be flushed to the closed end of the vacuum pipe section, and the slag or the fallen leaves are easy to damage components such as a vacuum pipeline or a valve due to high speed.
M.S. Holden, J.Harvey, M.Maclean et al, in "Development and Application of a New Ground Test Capability to Conduct Full-Scale Shroud and Stage Separation Studies at Duplicated Flight Conditions" (AIAA 2005-696) disclose that in the United states LENS II shock tunnel, in order to prevent debris or flaps from entering the vacuum tube section from the diaphragm, a centerbody valve is designed between the driven section and throat of the tunnel, which centerbody valve prevents high pressure driving gas from entering the vacuum tube section, and also prevents debris or flaps from entering the vacuum tube section from the diaphragm, which has the disadvantage of extending the flow field setup time, which in effect results in a loss of effective operating time of the tunnel for a short duration of operation of the tunnel.
Currently, there is a need to develop a dedicated diaphragm slag damper for pulse wind tunnels.
Disclosure of Invention
The invention aims to solve the technical problem of providing a plate type diaphragm slag crushing baffle arranged on a vacuum pipe section of a pulse wind tunnel.
The invention relates to a plate type diaphragm slag crushing baffle arranged on a pulse wind tunnel vacuum pipe section, which is characterized by comprising an impact plate, a supporting 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 end open and the other end closed, and the open end is connected with the downstream end of the pulse wind tunnel test section; the vacuum pipe section is provided with a mounting seat fixed at the lowest part of the lower wall surface of the vacuum pipe section at the 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 impact 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 central 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; the annular reinforcing rib is fixedly provided with a crescent metal plate which is in the same plane as the vertical circular metal plate and has the same thickness and is symmetrical, and the vertex position of the outer edge of the crescent metal plate is coated with a rubber block; 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 installed between the rope hanging ring I and the rope hanging ring II, the stretched length of each elastic pull rope 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 the supporting fork is a cylindrical end, the other end of the supporting fork is a fork-shaped end, the number of the supporting fork is two, and the supporting fork is symmetrically clamped at the upper vertex and the lower vertex of the impact plate through the fork-shaped ends; the support fork cylinder end of the upper vertex is sleeved with a gasket and a roller bearing, the support fork cylinder end of the upper vertex is fixed on the upper wall surface mounting seat through two butted L-shaped upper limiting plates, the horizontal section of the upper limiting plates is provided with a through hole, and the vertical section of the upper limiting plates is provided with a semi-cylindrical groove assembled with the roller bearing; the support fork cylinder end of the lower vertex is sleeved with a gasket and a thrust bearing, the support fork cylinder end of the lower vertex is fixed on the lower wall surface mounting seat through two butted straight-shaped lower limiting plates, the lower limiting plates are provided with through holes, and the ends of the lower limiting plates are provided with semi-cylindrical grooves assembled with the support fork cylinder end; the upper limiting plate is fixed on the upper wall surface mounting seat through bolts passing through the through holes, and the lower limiting plate is fixed on the lower wall surface mounting seat through bolts passing through the through holes.
The sum of the width of the crescent metal plate and the radius of the impact plate is 0.1 m-0.5 m larger than the radius of the vacuum pipe section, and the radius of the impact plate is 0.2 m-0.5 m smaller than the radius of the vacuum pipe section.
The rubber block is fixedly adhered to the vertex position of the outer edge of the crescent metal plate.
The impact plate arranged in the plate type diaphragm slag baffle of the pulse wind tunnel vacuum pipe section rotates along the vertical axis under the impact of test airflow and diaphragm slag or falling valve, has the functions of blocking diaphragm slag or falling valve and reducing impact of the diaphragm slag or falling valve, avoids damage of the diaphragm slag or falling valve to 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 arranged in the plate type diaphragm slag baffle of the pulse wind tunnel vacuum pipe section can realize the effect that the impact plate rotates around the vertical central axis under the impact of diaphragm slag or falling valve, and the thrust bearing also has the effect of supporting the weight of the impact plate.
The plate type diaphragm slag-crushing baffle plate arranged on the vacuum pipe section of the pulse wind tunnel has a simple and reliable structure, does not need operation and resetting of staff, and can effectively prevent diaphragm slag or valve falling from damaging the closed end of the vacuum pipe.
Drawings
FIG. 1 is a view perpendicular to the direction of air flow of a plate-type diaphragm slag damper of the present invention mounted in a pulse tunnel vacuum tube segment;
FIG. 2 is a view of a plate-type diaphragm slag damper of the present invention mounted in a pulse tunnel vacuum tube section taken in a horizontal plane;
FIG. 3 is a longitudinal plane of symmetry cross-sectional view of a plate-type diaphragm slag damper of the present invention mounted in a pulse tunnel vacuum tube segment;
FIG. 4 is an enlarged view of a portion of the portion I of FIG. 2;
FIG. 5 is an enlarged view of a portion of the portion II of FIG. 3;
FIG. 6 is an enlarged view of a portion of III in FIG. 3;
FIG. 7 is a perspective view of an impingement plate of the present invention mounted in a plate-type diaphragm slag shutter of a pulse tunnel vacuum pipe section;
FIG. 8 is a perspective view of a support fork of the present invention mounted in a plate type diaphragm slag crushing baffle of a pulse wind tunnel vacuum pipe section;
FIG. 9 is a perspective view of an upper limiting plate of the present invention mounted in a plate-type diaphragm slag crushing baffle of a pulse wind tunnel vacuum pipe section;
fig. 10 is a perspective view of a lower limiting plate of the present invention mounted in a plate-type diaphragm slag damper of a pulse wind tunnel vacuum pipe section.
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 rope hanging ring II 14, a rope hanging ring I15, a gasket 16 and a vertical reinforcing rib.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1 to 7, the plate type diaphragm slag crushing baffle installed on the vacuum pipe section of the pulse wind tunnel comprises an impact plate 1, a support fork 2, an upper limit plate 6, a lower limit plate 8 and an elastic pull rope 12;
the vacuum pipe section 4 is fixedly supported on the ground through a serial base 5, the vacuum pipe section 4 is a circular pipe with one end open and the other end closed, 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 4;
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 central lines of the front side surface and the rear side surface of the vertical circular metal plate; the radius of the annular reinforcing ribs 11 is smaller than that of the vacuum pipe section 4; the annular reinforcing rib 11 is fixedly provided with a crescent metal plate which is the same as the vertical circular metal plate in the same plane and has the same thickness and is symmetrically arranged, and the vertex position of the outer edge of the crescent metal plate is coated with a rubber block 10; a rope hanging ring I14 is fixed at the horizontal position of the annular reinforcing rib 11, a rope hanging ring II 13 corresponding to the rope hanging 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 rope hanging ring I14 and the rope hanging ring II 13, the stretched length of the 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 impact plate 1 and the axis of the vacuum pipe section 4 can be an acute angle;
as shown in fig. 8, one end of the supporting fork 2 is a cylindrical end, the other end is a fork-shaped end, two supporting forks 2 are arranged, and the supporting 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 support fork 2 at the upper vertex is sleeved with a gasket 15 and a roller bearing 7, the cylindrical end of the support fork 2 at the upper vertex is fixed on the upper wall surface mounting seat 3 through two butted L-shaped upper limiting plates 6 as shown in fig. 9, the horizontal section of the upper limiting plates 6 is provided with a through hole, and the vertical section of the upper limiting plates 6 is provided with a semi-cylindrical groove 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 straight-shaped lower limiting plates 8 as shown in fig. 10, the lower limiting plates 8 are provided with through holes, and the ends of the lower limiting plates 8 are provided with semi-cylindrical grooves 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 passing through the through holes, and the lower limiting plate 8 is fixed on the lower wall surface mounting seat 3 through bolts passing through the through holes.
The sum of the width of the crescent metal plate and the radius of the impact plate 1 is 0.1 m-0.5 m larger than the radius of the vacuum pipe section 4, and the radius of the impact plate 1 is 0.2 m-0.5 m smaller than the radius of the vacuum pipe section 4.
The rubber block 10 is fixedly adhered to the vertex position of the outer edge of the crescent metal plate.
Example 1:
the working process of the plate type diaphragm slag crushing baffle arranged on the vacuum pipe section of the pulse wind tunnel in the embodiment is as follows:
when in wind tunnel test, when diaphragm slag or valve falls in test airflow, the diaphragm slag or valve falls in high-speed motion firstly to strike the striking plate 1, under the acting force of the diaphragm slag or valve falls, the striking plate 1 can rotate along a vertical rotating shaft formed between the supporting fork 2 at the upper vertex and the supporting fork 2 at the lower vertex, the elastic pull rope 12 is elongated, the generated elastic force avoids the striking plate 1 to directly strike the inner wall surface of the vacuum pipe section 4, and meanwhile, the rubber block 10 adhered and fixed on the striking plate 1 can also lighten the damage effect of the striking plate 1 to the vacuum pipe section 4. After the test is finished, the striking plate 1 can automatically reset under the acting force of the elastic pull rope 12.
Claims (3)
1. The plate-type diaphragm slag crushing baffle plate is arranged on a pulse wind tunnel vacuum pipe section and 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 serial base (5), the vacuum pipe section (4) is a circular pipe with one end open and the other end closed, 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 (4);
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 central 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 the same as the vertical circular metal plate in the same plane and has the same thickness and is symmetrical is fixed on the annular reinforcing rib (11), and a rubber block (10) is coated at the vertex position of the outer edge of the crescent metal plate; a rope hanging ring I (14) is fixed at the horizontal position of the annular reinforcing rib (11), a rope hanging ring II (13) corresponding to the rope hanging 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 rope hanging ring I (14) and the rope hanging ring II (13), the stretched length of the 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 impact plate (1) and the axis of the vacuum pipe section (4) can be an acute angle;
one end of each supporting fork (2) is a cylindrical end, the other end of each supporting fork is a fork-shaped end, two supporting forks (2) are arranged, and the supporting 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 support fork (2) at the upper vertex is sleeved with a gasket (15) and a roller bearing (7), the cylindrical end of the support fork (2) at the upper vertex is fixed on the upper wall mounting seat (3) through two butted L-shaped upper limiting plates (6), the horizontal section of the upper limiting plates (6) is provided with a through hole, and the vertical section of the upper limiting plates (6) is provided with a semi-cylindrical groove 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 straight-shaped lower limiting plates (8), the lower limiting plates (8) are provided with through holes, and the end heads of the lower limiting plates (8) are provided with semi-cylindrical grooves 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 passing through the through holes, and the lower limiting plate (8) is fixed on the lower wall surface mounting seat (3) through bolts passing through the through holes.
2. The plate type diaphragm slag crushing baffle installed on a pulse wind tunnel vacuum pipe section 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 m-0.5 m larger than the radius of the vacuum pipe section (4), and the radius of the impact plate (1) is 0.2 m-0.5 m smaller than the radius of the vacuum pipe section (4).
3. The plate type diaphragm slag damper installed on the pulse wind tunnel vacuum pipe section according to claim 1, wherein the rubber block (10) is fixedly adhered to the position of the top point of the outer edge of the crescent 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN111307403A CN111307403A (en) | 2020-06-19 |
| CN111307403B true CN111307403B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010309997.4A Active 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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| Country | Link |
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| CN (1) | CN111307403B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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 |
| CN103512755A (en) * | 2013-09-16 | 2014-01-15 | 中国科学院力学研究所 | Radiation heating system used for active cooling test |
| CN106644358A (en) * | 2016-12-05 | 2017-05-10 | 中国航天空气动力技术研究院 | Shock tunnel diaphragm rupture device |
| CN108731903A (en) * | 2018-07-17 | 2018-11-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of disintegrating slag baffle |
| 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 |
-
2020
- 2020-04-20 CN CN202010309997.4A patent/CN111307403B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103512755A (en) * | 2013-09-16 | 2014-01-15 | 中国科学院力学研究所 | Radiation heating system used for active cooling test |
| CN106644358A (en) * | 2016-12-05 | 2017-05-10 | 中国航天空气动力技术研究院 | Shock tunnel diaphragm rupture device |
| CN108731903A (en) * | 2018-07-17 | 2018-11-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of disintegrating slag baffle |
| 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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| Title |
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| 红外成像在羽流撞击平板热效应试验中的应用;李明;廖俊必;祝智伟;李中华;;红外与激光工程;20101025(05);全文 * |
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