CN111307402A - Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel - Google Patents
Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel Download PDFInfo
- Publication number
- CN111307402A CN111307402A CN202010309994.0A CN202010309994A CN111307402A CN 111307402 A CN111307402 A CN 111307402A CN 202010309994 A CN202010309994 A CN 202010309994A CN 111307402 A CN111307402 A CN 111307402A
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- vacuum pipe
- pipe section
- wind tunnel
- rotating shaft
- mounting seat
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- 239000002893 slag Substances 0.000 title claims abstract description 42
- 239000000428 dust Substances 0.000 claims description 29
- 239000012528 membrane Substances 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 4
- 241000446313 Lamella Species 0.000 description 6
- 230000035939 shock Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 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
Images
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)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a fishbone type diaphragm slag breaking baffle plate installed on a vacuum pipe section of a pulse wind tunnel. The fishbone type diaphragm slag baffle consists of a front group of blade sets and a rear group of blade sets which are staggered and can rotate around a rotating shaft, and the blade sets are arranged at the closed end of a vacuum tube of a wind tunnel. When the wind tunnel test is carried out, when the diaphragm slag or the falling valve exists in the test airflow, the diaphragm slag or the falling valve moving at a high speed impacts the blade, and the blade can rotate along the rotating shaft under the acting force of the diaphragm slag or the falling valve, so that the impact of the diaphragm slag or the falling valve on the blade is reduced, the kinetic energy of the diaphragm slag or the falling valve is reduced, and the diaphragm slag or the falling valve is prevented from damaging the closed end of the vacuum tube. The fishbone type diaphragm slag breaking baffle plate installed on the vacuum pipe section of the pulse wind tunnel is simple and reliable in structure, does not need operation and reset of workers, and can effectively prevent diaphragm slag breaking or valve dropping from damaging the closed end of the vacuum pipe.
Description
Technical Field
The invention belongs to the field of wind tunnel equipment, and relates to a fishbone type diaphragm slag baffle plate installed on a vacuum pipe section of a pulse wind tunnel.
Background
In pulse equipment such as a shock tunnel, a diaphragm is generally used for separating different sections of the wind tunnel, when a wind tunnel test is carried out, gas with different pressures is respectively filled in pipe bodies on two sides of the diaphragm, after the diaphragm is broken under the action of high-pressure gas, shock waves are generated at the diaphragm, the shock waves compress the test gas in a low-pressure section to form high-temperature high-pressure test gas, and after the test gas breaks through the diaphragm at the tail end of the low-pressure section, the test gas enters a spray pipe to expand to form test gas flow.
The diaphragms of impulse wind tunnels such as shock wind tunnels and the like are generally made of metal or polyester fiber materials. During the tearing process of the metal membrane by the high-pressure airflow, slag can be generated, and a large flap can be generated. The polyester fiber is vaporized after the high-temperature gas is melted, but the problem of incomplete vaporization exists, and the film fragments are also generated. The crushed slag or the falling flaps reach the vacuum pipe section along with the high-speed airflow, and the crushed slag or the falling flaps have high speed and are easy to damage the vacuum pipe section when impacting the closed end of the vacuum pipe.
In the us lenii shock tunnel, in order to prevent debris or flaps of the membrane from entering the vacuum duct section, a central body valve is designed between the driven section and the throat of the tunnel, which central body valve can prevent high-pressure driving gas from entering the vacuum duct section and also prevent debris or flaps of the membrane from entering the vacuum duct section, which device has the disadvantage of extending the setup time of the tunnel, which actually results in a loss of the effective operation time of the tunnel for short-time operation.
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 fishbone type diaphragm slag baffle plate arranged on a vacuum pipe section of a pulse wind tunnel.
The invention relates to a fishbone type diaphragm slag baffle arranged on a vacuum pipe section of a pulse wind tunnel, which is characterized in that the slag baffle comprises a dust baffle, a rotating shaft and a limiting cylinder;
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; the vacuum pipe is characterized in that a front mounting seat and a rear mounting seat which are fixed at the lowest position of the lower wall surface of the vacuum pipe section are arranged in the vacuum pipe section at positions corresponding to the base, and a corresponding front mounting seat and a corresponding rear mounting seat are arranged at the highest position of the upper wall surface of the vacuum pipe section;
the rotating shaft is two vertically placed cylinders, two ends of one cylinder are respectively inserted into the upper wall surface mounting seat and the corresponding lower wall surface mounting seat which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into the upper wall surface mounting seat and the corresponding lower wall surface mounting seat which are positioned at the downstream;
the center of the dust baffle is a sleeve, the height of the sleeve is H, two symmetrical blades are mounted on the sleeve, the included angle between the two blades ranges from 90 degrees to 150 degrees, and the length of each blade is slightly smaller than the horizontal length of a vacuum pipe section corresponding to the mounting height of each blade;
the limiting cylinder is a circular tube with bosses at two ends, and the height of the limiting cylinder is H;
the dust baffle and the limiting cylinder are arranged on the same rotating shaft in a vertically staggered manner; the dust guard plate and the limiting cylinder are arranged on the two rotating shafts in an up-down staggered mode, namely the dust guard plate arranged on the upstream rotating shaft corresponds to the limiting cylinder arranged on the downstream rotating shaft.
And a thrust bearing is arranged at the lower part in the sleeve of the dust baffle plate.
The upper end and the lower end of the rotating shaft are respectively fixed on the mounting seat through an upper group of mounting blocks and a lower group of mounting blocks; the mounting block is a flat plate, and a through hole assembled with the threaded hole of the mounting seat is formed in the flat plate; each group of mounting blocks is provided with two mounting blocks, one side end of one mounting block is provided with a semicircular groove I matched with the rotating shaft, the corresponding side end of the other mounting block is provided with a semicircular groove II matched with the rotating shaft, and after one group of mounting blocks is assembled, the semicircular groove I and the semicircular groove II are combined into a circular hole surrounding the rotating shaft; the mounting block is fixed on the mounting seat through a bolt.
The mounting seat is welded at the lowest point of the inner wall surface of the vacuum section.
The invention is arranged in the fishbone type diaphragm slag baffle of the vacuum pipe section of the pulse wind tunnel, and the dust baffle has a plurality of groups, and the difference is the length of the blade; the dust baffles are arranged on the rotating shaft in the sequence of long middle and short two ends, and a limiting cylinder is arranged between the two dust baffles to keep a certain distance; a thrust bearing is arranged at the lower part in the sleeve of each dust guard plate; after the dust baffle is installed, a gap is reserved between the dust baffle and the wall surface of the vacuum pipe section.
The fishbone type diaphragm slag breaking baffle plate arranged on the vacuum pipe section of the pulse wind tunnel is composed of a front group of dust blocking plates and a rear group of dust blocking plates, the positions of blades and gaps of the front group of dust blocking plates and the rear group of dust blocking plates are opposite, the blades are just distributed on the cross section of the whole vacuum pipe section when seen from front to back along the airflow direction.
The blades in the fishbone type diaphragm slag baffle plate arranged in the vacuum pipe section of the pulse wind tunnel can rotate around the rotating shaft under the action of slag, so that the impact of the diaphragm slag or the falling flaps on the blades is reduced.
The fishbone type diaphragm slag-crushing baffle plate arranged on the vacuum pipe section of the pulse wind tunnel can block crushed slag or falling flaps of the wind tunnel diaphragm, and damage of the crushed slag or falling flaps of the wind tunnel diaphragm to the closed end of the vacuum pipe is avoided.
Drawings
FIG. 1 is a three-dimensional schematic view of a fishbone type membrane slag-breaking baffle plate installed in a vacuum pipe section of a pulse wind tunnel according to the invention;
FIG. 2 is a lower view of the fishbone-type membrane slag-breaking baffle installed in the vacuum pipe section of the impulse wind tunnel according to the invention, cut along the horizontal plane;
FIG. 3 is a view of the fishbone-type membrane slag-breaking baffle of the invention installed in the vacuum pipe section of the impulse wind tunnel along the direction of air flow;
FIG. 4 is a perspective view of the vacuum tube section of the fishbone membrane slag baffle of the invention installed in the vacuum tube section of the impulse wind tunnel;
FIG. 5 is a perspective view of a blade of the fishbone diaphragm slag baffle of the invention installed in a vacuum tube section of a pulse wind tunnel;
FIG. 6 is a perspective view of a limiting cylinder installed in a fishbone type membrane slag-breaking baffle of a vacuum pipe section of a pulse wind tunnel according to the invention;
FIG. 7 is a perspective view of the mounting block of the present invention mounted in the fishbone membrane slag baffle of the vacuum duct section of a pulsed wind tunnel.
In the figure, 1 is a dust baffle, 2 is a rotating shaft, 3 is a limiting cylinder, 4 is a mounting block, 5 is a vacuum pipe section, 6 is a base, 7 is a blade, 8 is a sleeve, 9 is a mounting seat, 10 is a boss, and 11 is a through hole.
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 4, the fishbone type membrane slag breaking baffle plate installed on the vacuum pipe section of the impulse wind tunnel comprises a dust baffle plate 1, a rotating shaft 2 and a limiting cylinder 3;
the vacuum pipe section 5 is fixedly supported on the ground through a tandem base 6, the vacuum pipe section 5 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 front mounting seat and a rear mounting seat 9 which are fixed at the lowest position of the lower wall surface of the vacuum pipe section 5 are arranged in the vacuum pipe section 5 at the positions corresponding to the base 6, and a corresponding front mounting seat and a corresponding rear mounting seat 9 are arranged at the highest position of the upper wall surface of the vacuum pipe section 5;
the rotating shaft 2 is two vertically placed cylinders, two ends of one cylinder are respectively inserted into the upper wall surface mounting seat 9 and the corresponding lower wall surface mounting seat 9 which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into the upper wall surface mounting seat 9 and the corresponding lower wall surface mounting seat 9 which are positioned at the downstream;
the center of the dust baffle 1 is a sleeve 8 as shown in fig. 5, the height of the sleeve 8 is H, two symmetrical blades 7 are mounted on the sleeve 8, the included angle between the two blades 7 ranges from 90 degrees to 150 degrees, and the length of each blade 7 is slightly smaller than the horizontal length of the vacuum pipe section 5 corresponding to the mounting height of each blade 7;
as shown in fig. 6, the limiting cylinder 3 is a circular tube with bosses 10 at two ends, and the height of the limiting cylinder 3 is also H;
the dust baffle plate 1 and the limiting cylinder 3 are arranged on the same rotating shaft 2 in a vertically staggered manner; the dust guard plate 1 and the limiting cylinder 3 are arranged on the two rotating shafts 2 in an up-and-down staggered mode, namely the dust guard plate 1 arranged on the upstream rotating shaft 2 corresponds to the limiting cylinder 3 arranged on the downstream rotating shaft 2.
The lower part in the sleeve 8 of the dust guard plate 1 is provided with a thrust bearing.
The upper end and the lower end of the rotating shaft 2 are respectively fixed on a mounting seat 9 through an upper group of mounting blocks 4 and a lower group of mounting blocks 4 as shown in figure 7; the mounting block 4 is a flat plate, and a through hole 11 assembled with a threaded hole of the mounting seat 9 is formed in the flat plate; each group of mounting blocks 4 is provided with two mounting blocks, one side end of one mounting block 4 is provided with a semicircular groove I matched with the rotating shaft 2, the corresponding side end of the other mounting block 4 is provided with a semicircular groove II matched with the rotating shaft 2, and after one group of mounting blocks 4 are assembled, the semicircular groove I and the semicircular groove II are combined into a circular hole surrounding the rotating shaft 2; the mounting block 4 is fixed on the mounting base 9 by bolts.
The mounting seat 9 is welded at the lowest point of the inner wall surface of the vacuum section 5.
Example 1
The fishbone type membrane slag breaking baffle arranged on the vacuum pipe section of the pulse wind tunnel is arranged in the vacuum pipe section 5 with the magnitude of 4 meters.
During the wind tunnel test, when there is the diaphragm disintegrating slag or falls the lamella in the test air current, the diaphragm disintegrating slag of high-speed motion or fall the lamella and strike on blade 7, under the effort of diaphragm disintegrating slag or falling the lamella, blade 7 can rotate along pivot 2, has reduced the impact of diaphragm disintegrating slag or falling the lamella to blade 7, has reduced the kinetic energy of diaphragm disintegrating slag or falling the lamella, has avoided the diaphragm disintegrating slag or has fallen the lamella and produce the destruction to the vacuum tube closed end.
Claims (4)
1. A fishbone type diaphragm slag baffle arranged on a vacuum pipe section of a pulse wind tunnel is characterized in that the slag baffle comprises a dust baffle plate (1), a rotating shaft (2) and a limiting cylinder (3);
the vacuum pipe section (5) is fixedly supported on the ground through a tandem base (6), the vacuum pipe section (5) 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 front mounting seat and a rear mounting seat (9) which are fixed at the lowest position of the lower wall surface of the vacuum pipe section (5) are arranged in the vacuum pipe section (5) at the positions corresponding to the base (6), and a corresponding front mounting seat and a corresponding rear mounting seat (9) are arranged at the highest position of the upper wall surface of the vacuum pipe section (5);
the rotating shaft (2) is two vertically placed cylinders, two ends of one cylinder are respectively inserted into the upper wall surface mounting seat (9) and the corresponding lower wall surface mounting seat (9) which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into the upper wall surface mounting seat (9) and the corresponding lower wall surface mounting seat (9) which are positioned at the downstream;
the center of the dust guard plate (1) is provided with a sleeve (8), the height of the sleeve (8) is H, two symmetrical blades (7) are arranged on the sleeve (8), the included angle range between the two blades (7) is 90-150 degrees, and the length of each blade (7) is slightly smaller than the horizontal length of the vacuum pipe section (5) corresponding to the installation height of the blade (7);
the limiting cylinder (3) is a circular tube with bosses (10) at two ends, and the height of the limiting cylinder (3) is H;
the dust baffle (1) and the limiting cylinder (3) are arranged on the same rotating shaft (2) in a vertically staggered manner; the dust guard plate (1) and the limiting cylinder (3) are installed on the two rotating shafts (2) in an up-down staggered mode, namely the dust guard plate (1) installed on the upstream rotating shaft (2) corresponds to the limiting cylinder (3) installed on the downstream rotating shaft (2).
2. The fishbone diaphragm slag baffle mounted on a vacuum pipe section of a pulse wind tunnel according to claim 1, wherein a thrust bearing is mounted at the inner lower part of the sleeve (8) of the dust baffle (1).
3. The fishbone-type membrane slag-crushing baffle plate installed on the vacuum pipe section of the pulse wind tunnel according to claim 1, wherein the upper end and the lower end of the rotating shaft (2) are respectively fixed on the installation seat (9) through an upper group of installation blocks (4) and a lower group of installation blocks (4); the mounting block (4) is a flat plate, and a through hole (11) assembled with a threaded hole of the mounting seat (9) is formed in the flat plate; each group of mounting blocks (4) is provided with two mounting blocks, one side end of one mounting block (4) is provided with a semicircular groove I matched with the rotating shaft (2), the corresponding side end of the other mounting block (4) is provided with a semicircular groove II matched with the rotating shaft (2), and after one group of mounting blocks (4) are assembled, the semicircular groove I and the semicircular groove II are combined into a circular hole surrounding the rotating shaft (2); the mounting block (4) is fixed on the mounting base (9) through a bolt.
4. The fishbone membrane slag baffle mounted on the vacuum pipe section of the impulse wind tunnel according to claim 1, wherein the mounting seat (9) is welded at the lowest point of the inner wall surface of the vacuum pipe section (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309994.0A CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309994.0A CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111307402A true CN111307402A (en) | 2020-06-19 |
| CN111307402B CN111307402B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010309994.0A Active CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone 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) | CN111307402B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029017A (en) * | 2014-06-24 | 2014-09-10 | 四川省工业设备安装公司 | Wind tunnel flow deflector forming device |
| CN105444979A (en) * | 2015-08-21 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Array diaphragm pressure releasing type wind tunnel experiment cabin |
| CN205228769U (en) * | 2015-12-11 | 2016-05-11 | 中国航天空气动力技术研究院 | A featheredge metallic diaphragm for jumbo size pulse wind -tunnel |
| CN106644359A (en) * | 2016-12-07 | 2017-05-10 | 中国航天空气动力技术研究院 | Film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking |
| CN111307403A (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 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| 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 |
| CN211626869U (en) * | 2020-04-20 | 2020-10-02 | 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 |
-
2020
- 2020-04-20 CN CN202010309994.0A patent/CN111307402B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029017A (en) * | 2014-06-24 | 2014-09-10 | 四川省工业设备安装公司 | Wind tunnel flow deflector forming device |
| CN105444979A (en) * | 2015-08-21 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Array diaphragm pressure releasing type wind tunnel experiment cabin |
| CN205228769U (en) * | 2015-12-11 | 2016-05-11 | 中国航天空气动力技术研究院 | A featheredge metallic diaphragm for jumbo size pulse wind -tunnel |
| CN106644359A (en) * | 2016-12-07 | 2017-05-10 | 中国航天空气动力技术研究院 | Film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking |
| CN111307403A (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 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| 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 |
| CN211626869U (en) * | 2020-04-20 | 2020-10-02 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 范晓樯;贾地;冯定华;李桦;: "脉冲风洞中进气道起动过程试验研究", 推进技术, no. 01, 28 February 2007 (2007-02-28) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
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| CN111307402B (en) | 2024-04-05 |
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