CN111060279A - Rotary wind tunnel isolation door - Google Patents
Rotary wind tunnel isolation door Download PDFInfo
- Publication number
- CN111060279A CN111060279A CN201911408213.7A CN201911408213A CN111060279A CN 111060279 A CN111060279 A CN 111060279A CN 201911408213 A CN201911408213 A CN 201911408213A CN 111060279 A CN111060279 A CN 111060279A
- Authority
- CN
- China
- Prior art keywords
- rotary
- flow passage
- door
- door body
- wind tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a rotary wind tunnel isolation door, which relates to the technical field of wind tunnel test devices and comprises a shell, wherein an inner runner structure and an outer runner structure are arranged in the shell; the center of the rotating door body is provided with a door shaft, and two ends of the door shaft are respectively arranged on the inner flow passage structure and the outer flow passage structure through bearings; a flow passage hole is formed in the door body and positioned on one side of the door shaft; when the rotary door body rotates to the opening limit position, the flow passage hole is communicated and aligned with the inner flow passage and the outer flow passage; when the rotary door body rotates to the closing limit position, the flow passage hole is not communicated with the inner flow passage and the outer flow passage. The rotary wind tunnel isolation door disclosed by the invention is compact in structure, easy to control and more stable in operation, and is beneficial to reducing the butt joint step difference between the isolation door and a wind tunnel main body flow passage, improving the butt joint precision and further improving the precision of test data.
Description
Technical Field
The invention relates to the technical field of wind tunnel test devices, in particular to a rotary wind tunnel isolation door.
Background
The wind tunnel experiment refers to the placement of aircraft or other object models in a wind tunnel to study gas flow and interaction with the models. The wind tunnel need set up the isolating gate in the upper and lower reaches suitable position of test section, when the wind tunnel is in pressure boost or step-down state, if the staff need get into the operation of test section, only need close the isolating gate, with wind tunnel local area resume normal atmospheric pressure, need not carry out step-down or pressure boost to whole wind tunnel to guarantee that the gas in the body circuit of the hole does not leak or vacuum environment is not destroyed.
The existing isolating door generally adopts a flashboard type structure, and a driving device drives the flashboard to move linearly so as to block or open an air flow channel. The isolating door is unstable in operation when the inserting plate is opened and closed, and the repeated positioning precision is low. When the inserting plate is opened to enable the airflow channel to be completely opened, the inserting plate is easy to displace due to vibration caused by airflow, the molded surface of the inner cavity of the airflow channel of the isolating door is influenced, the airflow is further influenced, and the deviation of test data is large.
Disclosure of Invention
Aiming at one of the defects in the prior art, the invention aims to provide the rotary wind tunnel isolation door which is compact in structure, easy to control, more stable in operation and beneficial to reducing the butt joint step difference between the isolation door and a wind tunnel main body flow channel.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a rotary wind tunnel isolation door comprising:
the device comprises a shell, a first flow passage and a second flow passage, wherein an inner flow passage structure and an outer flow passage structure are arranged in the shell, an accommodating cavity is formed between the inner flow passage structure and the outer flow passage structure, an inner flow passage is formed in the inner flow passage structure, and an outer flow passage corresponding to the inner flow passage is formed in the outer flow passage structure;
the rotary door body is arranged in the accommodating cavity, a door shaft is arranged at the center of the rotary door body, and two ends of the door shaft are respectively arranged on the inner runner structure and the outer runner structure through bearings; the rotary door body is provided with a runner hole at one side of the door shaft;
when the rotary door body rotates to an opening limit position, the flow passage hole is communicated and aligned with the inner flow passage and the outer flow passage; when the rotary door body rotates to the closing limit position, the flow passage hole is not communicated with the inner flow passage and the outer flow passage.
On the basis of the technical scheme, a first inflatable surrounding belt is arranged on one side, close to the rotary door body, of the inner flow passage structure, and the first inflatable surrounding belt surrounds the edge of the inner flow passage for a circle;
and a second inflatable surrounding belt is arranged on one side of the outer flow passage structure, which is close to the rotary door body, and the second inflatable surrounding belt surrounds the edge of the outer flow passage by a circle.
On the basis of the technical scheme, the first inflatable surrounding belt is fixed on the inner runner structure through the first mounting seat, and the second inflatable surrounding belt is fixed on the outer runner structure through the second mounting seat.
On the basis of the technical scheme, the first inflatable surrounding belt and the second inflatable surrounding belt are made of rubber materials.
On the basis of the technical scheme, the rotary door body is circular, the edge of the rotary door body is provided with a boss, and the centers of the boss, the door shaft and the flow passage hole are positioned on the same straight line;
the inner wall of the accommodating cavity is provided with a first stopping part and a second stopping part which are respectively matched with the lug bosses, and the first stopping part and the second stopping part are respectively arranged at two sides of the rotating door body and are arranged along the radial direction of the rotating door body;
when the rotating door body rotates to the opening limit position, the first stopping part is in matched abutting joint with the boss;
when the rotating door body rotates to the closing limit position, the second stopping part is in matched abutting joint with the boss.
On the basis of the technical scheme, the end faces of the first stopping part and the second stopping part are respectively provided with a contact surface matched with the boss.
On the basis of the technical scheme, the door lock further comprises a driving mechanism, and the driving end of the driving mechanism is connected with the door shaft through a driving joint.
On the basis of the above technical solution, the driving mechanism is disposed on the inner flow path structure or the outer flow path structure.
On the basis of the technical scheme, the two bearings are respectively fixed on the inner runner structure and the outer runner structure through the bearing seats.
Compared with the prior art, the invention has the advantages that:
(1) the rotary wind tunnel isolation door can bear positive pressure and negative pressure, and the opening and closing functions of the isolation door are realized by arranging the rotary door body in the accommodating cavity of the shell and controlling whether the channel hole is communicated with the inner channel and the outer channel in a mode of rotating the rotary door body.
(2) According to the rotary wind tunnel isolation door, when the isolation door is in a fully opened state or a fully closed state, the first inflatable surrounding belt and the second inflatable surrounding belt are inflated and expanded, so that sealing between the rotary door body and the inner flow passage structure and sealing between the rotary door body and the outer flow passage structure can be realized; when the state of the isolating door needs to be changed, the first inflatable shroud and the second inflatable shroud are deflated, sealing can be removed, and the rotary door body is rotated.
(3) According to the rotary wind tunnel isolation door, the first stopping part and the second stopping part are arranged on the inner wall of the accommodating cavity, so that the rotating range of the rotating door body can be limited, and the rotating door body can be accurately positioned.
Drawings
FIG. 1 is a schematic view of an open state of a rotary wind tunnel isolation door according to an embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is an enlarged view of B in FIG. 2;
FIG. 4 is a schematic structural diagram of a housing according to an embodiment of the present invention;
FIG. 5 is a schematic view illustrating the rotation of the rotary door body to the opening limit position according to the embodiment of the present invention;
FIG. 6 is a schematic view of the rotary door body rotating to a closed limit position according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of a closed state of a rotary wind tunnel isolation door according to an embodiment of the present invention.
Reference numerals:
1-shell, 11-inner flow passage structure, 111-inner flow passage, 12-outer flow passage structure, 121-outer flow passage, 13-accommodating cavity, 131-first stopping part, 132-second stopping part;
2-rotating door body, 21-flow passage hole, 22-boss;
3-a door shaft; 4-a first inflatable shroud, 5-a second inflatable shroud, 51-a second mounting seat; 6-a drive mechanism; 7-drive the joint.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, the present invention provides an embodiment of a rotary wind tunnel isolation door, which includes a housing 1 and a rotary door body 2.
Referring to fig. 4, an inner flow path structure 11 and an outer flow path structure 12 are disposed inside the housing 1, an accommodating cavity 13 is formed between the inner flow path structure 11 and the outer flow path structure 12, an inner flow path 111 is formed on the inner flow path structure 11, and an outer flow path 121 is formed on the outer flow path structure 12. The inner flow channel 111 and the outer flow channel 121 are disposed correspondingly, and the centers of the two are aligned.
In this embodiment, the housing 1 is a fixing member fixed to the wind tunnel flow passage and is an installation base of the isolation door. The shell 1 is in a disc shape, the shell 1 is in butt joint with a wind tunnel main body shell, and the inner runner structure 11 and the outer runner structure 12 are in butt joint with the wind tunnel main body runner structure respectively. Therefore, the opposite outer sides of the inner flow passage 111 and the outer flow passage 121 are both butted against the wind tunnel main body flow passage.
Referring to fig. 2, the rotary door 2 is disposed in the accommodating cavity 13, and a door shaft 3 is disposed at the center of the rotary door 2. Both ends of the door shaft 3 are respectively installed on the inner flow path structure 11 and the outer flow path structure 12 through bearings. The door shaft 3 is rigidly connected to the rotary door body 2, supports the rotary door body 2 via the door shaft 3, and rotates together with the rotary door body 2.
The rotary door body 2 is provided with a flow passage hole 21 at one side of the door shaft 3. The shapes and sizes of the two ports of the flow passage hole 21 correspond to those of the inner flow passage 111 and the outer flow passage 121, respectively, so that the opening function of the main flow passage of the wind tunnel is realized, and the smoothness of the flow passages is ensured. The other side of the rotary door body 2 positioned on the door shaft 3 is a blocking surface, and the closing function of the flow channel can be realized.
Referring to fig. 5, when the rotary door 2 rotates to the opening limit position, the flow passage hole 21 is aligned with the inner flow passage 111 and the outer flow passage 121 on both sides thereof to form an air passage, and the isolation door is in an open state.
Referring to fig. 6, when the rotary door 2 rotates to the closing limit position, the upper flow passage hole 21 is not communicated with the inner flow passage 111 and the outer flow passage 121, and the isolation door is in the closed state.
The insulated door of this embodiment, set up in the holding cavity 13 of casing 1 through the rotatory door body 2, with the mode of rotatory this rotatory door body 2, whether control runner hole 21 communicates with above-mentioned interior runner 111 and outer runner 121, and then realize opening and closing function of insulated door, compact structure not only, for linear motion, the rotary motion of the rotatory door body 2 is changeed in controlling, and the operation is more stable, be favorable to reducing the butt joint jump of insulated door and wind-tunnel main part runner, improve the butt joint precision, and then improve the precision of test data.
In addition to the above embodiments, in the present embodiment, a first inflation shroud 4 is provided at a side of the inner flow path structure 11 close to the rotating door body 2, and the first inflation shroud 4 is wound around an edge of the inner flow path 111. A second inflating shroud 5 is arranged on one side of the outer flow passage structure 12 close to the rotary door body 2, and the second inflating shroud 5 surrounds the edge of the outer flow passage 121 for one circle.
When the isolating door is in a fully opened state or a fully closed state, the first inflatable surrounding belt 4 and the second inflatable surrounding belt 5 are inflated and expanded, so that sealing between the rotary door body 2 and the inner flow passage structure 11 and sealing between the rotary door body 2 and the outer flow passage structure 12 can be realized; when the state of the isolating door needs to be changed, the first inflatable shroud 4 and the second inflatable shroud 5 are deflated, so that sealing can be released, and the rotary door body 2 is rotated.
Further, the first inflatable shroud 4 is fixed to the inner flow path structure 11 by a first mounting seat, and the second inflatable shroud 5 is fixed to the outer flow path structure 12 by a second mounting seat 51. The first inflatable shroud 4 and the second inflatable shroud 5 can be fixed and limited by the first mounting seat and the second mounting seat respectively. Optionally, the first inflatable shroud 4 and the second inflatable shroud 5 are made of rubber.
In this embodiment, the rotary door 2 is a circular and flat plate structure. The edge of the rotary door body 2 is provided with a boss 22, and the boss 22, the door shaft 3 and the center of the flow passage hole 21 are positioned on the same straight line.
The inner wall of the accommodating cavity 13 is provided with a first stopping portion 131 and a second stopping portion 132, and both the first stopping portion 131 and the second stopping portion 132 are adapted to the boss 22. The first stopping portion 131 and the second stopping portion 132 are respectively disposed on two sides of the rotating door 2 and are radially disposed along the rotating door 2.
When the rotary door body 2 rotates to the opening limit position, the first stopping portion 131 is in fit abutment with the boss 22; when the rotary door body 2 rotates to the closing limit position, the second stopper portion 132 is in fit abutment with the boss 22. By arranging the first stopping portion 131 and the second stopping portion 132 on the inner wall of the accommodating cavity 13, the rotation range of the rotating door 2 can be limited, and the rotating door 2 can be accurately positioned.
In addition to the above embodiments, in the present embodiment, the end surfaces of the first blocking portion 131 and the second blocking portion 132 are both provided with contact surfaces adapted to the boss 22, and when the boss 22 of the rotary door body 2 rotates to contact with the contact surfaces, the boss 22 reaches the limit position.
In this embodiment, the wind tunnel isolation door further includes a driving mechanism 6, and a driving end of the driving mechanism 6 is connected to the door shaft 3 through a driving joint 7. The driving mechanism 6 provides the rotating power required by the rotating door body 2 to realize the rotation of the door body. Alternatively, the driving mechanism 6 is a device such as a cylinder or a hydraulic motor that can drive the door shaft 3 to rotate. In this embodiment, the driving mechanism 6 is an oil cylinder.
Further, the driving mechanism 6 is provided on the inner flow path structure 11 or the outer flow path structure 12. When the fixed end of the driving mechanism 6 is fixed on the inner flow passage structure 11, the driving joint 7 is positioned at one end of the door shaft 3 close to the inner flow passage structure 11; when the fixed end of the driving mechanism 6 is fixed to the outer flow passage structure 12, the driving joint 7 is located at the end of the door spindle 3 close to the outer flow passage structure 12.
In this embodiment, the outer rings of the two bearings are fixed to the inner flow channel structure 11 and the outer flow channel structure 12 through the bearing seats, respectively.
Referring to fig. 7, when the isolation door of this embodiment is closed, first, the first inflatable surrounding belt 4 and the second inflatable surrounding belt 5 are decompressed, and the sealing is released, then the driving mechanism 6 is started to drive the rotating door body 2 to rotate forward to the closing limit position, the second stopping portion 132 is abutted to the boss 22 in a matching manner, the blocking surface of the rotating door body 2 is aligned to the inner flow channel 111 and the outer flow channel 121 on both sides of the rotating door body, and finally, the first inflatable surrounding belt 4 and the second inflatable surrounding belt 5 are inflated and expanded to realize the sealing, and the isolation door is closed.
Referring to fig. 1, when the isolation door of this embodiment is opened, first aerify shroud 4 and second and aerify shroud 5 and carry out the pressure release earlier, remove sealedly, then actuating mechanism 6 starts to drive the rotatory door body 2 reverse rotation to opening extreme position, first backstop portion 131 and boss 22 cooperation butt, the runner hole 21 of the rotatory door body 2 aligns with inner flow channel 111 and outer runner 121 of its both sides, finally, first aerify shroud 4 and second and aerify shroud 5 and aerify the inflation realization and seal, the isolation door is opened, form the wind channel.
The isolating door of the embodiment can bear positive pressure and negative pressure, and can ensure the section line type of the wind tunnel runner by arranging the runner hole on the rotary door body, so that the abutting step difference between the isolating door and the wind tunnel main body runner is small, and the precision of test data is high.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (9)
1. A rotary wind tunnel isolation door, comprising:
the flow channel structure comprises a shell (1), wherein an inner flow channel structure (11) and an outer flow channel structure (12) are arranged in the shell, an accommodating cavity (13) is formed between the inner flow channel structure (11) and the outer flow channel structure (12), an inner flow channel (111) is formed on the inner flow channel structure (11), and an outer flow channel (121) corresponding to the inner flow channel (111) is formed on the outer flow channel structure (12);
the rotary door body (2) is arranged in the accommodating cavity (13), a door shaft (3) is arranged at the center of the rotary door body (2), and two ends of the door shaft (3) are respectively arranged on the inner runner structure (11) and the outer runner structure (12) through bearings; a runner hole (21) is formed in one side, located on the door shaft (3), of the rotary door body (2);
when the rotary door body (2) rotates to the opening limit position, the flow passage hole (21) is communicated and aligned with the inner flow passage (111) and the outer flow passage (121); when the rotary door body (2) rotates to the closing limit position, the flow passage hole (21) is not communicated with the inner flow passage (111) and the outer flow passage (121).
2. A rotary wind tunnel isolation door according to claim 1, wherein: a first inflatable surrounding belt (4) is arranged on one side, close to the rotary door body (2), of the inner flow channel structure (11), and the first inflatable surrounding belt (4) surrounds the edge of the inner flow channel (111) for one circle;
and a second inflatable surrounding belt (5) is arranged on one side, close to the rotary door body (2), of the outer flow channel structure (12), and the second inflatable surrounding belt (5) surrounds the edge of the outer flow channel (121) by one circle.
3. A rotary wind tunnel isolation door according to claim 2, wherein: the first inflatable shroud ring (4) is fixed to the inner runner structure (11) through a first mounting seat, and the second inflatable shroud ring (5) is fixed to the outer runner structure (12) through a second mounting seat.
4. A rotary wind tunnel isolation door according to claim 2, wherein: the first inflatable surrounding belt (4) and the second inflatable surrounding belt (5) are made of rubber materials.
5. A rotary wind tunnel isolation door according to claim 1, wherein: the rotary door body (2) is circular, a boss (22) is arranged on the edge of the rotary door body, and the centers of the boss (22), the door shaft (3) and the flow passage hole (21) are positioned on the same straight line;
the inner wall of the accommodating cavity (13) is provided with a first stopping part (131) and a second stopping part (132) which are respectively matched with the boss (22), and the first stopping part (131) and the second stopping part (132) are respectively arranged at two sides of the rotary door body (2) and are radially arranged along the rotary door body (2);
when the rotating door body (2) rotates to the opening limit position, the first stopping part (131) is in matched abutting joint with the boss (22);
when the rotary door body (2) rotates to the closing limit position, the second stopping portion (132) is in matched abutting connection with the boss (22).
6. A rotary wind tunnel isolation door according to claim 5, wherein: the end surfaces of the first stopping portion (131) and the second stopping portion (132) are respectively provided with a contact surface matched with the boss (22).
7. A rotary wind tunnel isolation door according to claim 1, wherein: the door frame further comprises a driving mechanism (6), and the driving end of the driving mechanism (6) is connected with the door shaft (3) through a driving joint (7).
8. A rotary wind tunnel isolation door according to claim 7, wherein: the driving mechanism (6) is arranged on the inner runner structure (11) or the outer runner structure (12).
9. A rotary wind tunnel isolation door according to claim 1, wherein: the two bearings are respectively fixed on the inner runner structure (11) and the outer runner structure (12) through bearing seats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408213.7A CN111060279B (en) | 2019-12-31 | 2019-12-31 | Rotary wind tunnel isolation door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408213.7A CN111060279B (en) | 2019-12-31 | 2019-12-31 | Rotary wind tunnel isolation door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111060279A true CN111060279A (en) | 2020-04-24 |
| CN111060279B CN111060279B (en) | 2022-03-01 |
Family
ID=70305385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911408213.7A Active CN111060279B (en) | 2019-12-31 | 2019-12-31 | Rotary wind tunnel isolation door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111060279B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1816094A1 (en) * | 1990-02-02 | 1995-08-20 | Московский машиностроительный завод им.С.В.Ильюшина | Device for measurement of aerodynamic oscillations of flying vehicle compartment doors in flight |
| CN2856253Y (en) * | 2005-11-26 | 2007-01-10 | 王孝亮 | Rotating fireproof isolating door |
| CN102537395A (en) * | 2012-01-01 | 2012-07-04 | 浙江石化阀门有限公司 | Electric isolating valve |
| CN104458196A (en) * | 2014-10-31 | 2015-03-25 | 中南大学 | Shutter type mechanism for generating horizontal shear airflow in conventional wind tunnel in simulation mode and method |
| CN106323585A (en) * | 2016-11-10 | 2017-01-11 | 中国航天空气动力技术研究院 | Pore plate capable of adjusting aperture online |
| CN106522787A (en) * | 2016-09-28 | 2017-03-22 | 中国航空规划设计研究总院有限公司 | Isolation door bearing positive pressure and negative pressure in wind tunnel |
| CN106546406A (en) * | 2016-09-28 | 2017-03-29 | 中国航空规划设计研究总院有限公司 | A kind of test section replacing options of continuous way transonic wind tunnel |
| CN108507751A (en) * | 2018-06-28 | 2018-09-07 | 中国汽车工程研究院股份有限公司 | Automotive environment wind-tunnel variable degree collection port |
| CN209372355U (en) * | 2019-02-01 | 2019-09-10 | 国电环境保护研究院有限公司 | A kind of band bypass revolving door direct current blows formula gust wind tunnel |
| US10429270B2 (en) * | 2016-02-15 | 2019-10-01 | Inclined Labs AB | Wind tunnel for human flight |
| CN110333044A (en) * | 2019-05-27 | 2019-10-15 | 中国空气动力研究与发展中心 | Shock tunnel air intake duct self-starting test exports pneumatic revolving door device and method |
-
2019
- 2019-12-31 CN CN201911408213.7A patent/CN111060279B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1816094A1 (en) * | 1990-02-02 | 1995-08-20 | Московский машиностроительный завод им.С.В.Ильюшина | Device for measurement of aerodynamic oscillations of flying vehicle compartment doors in flight |
| CN2856253Y (en) * | 2005-11-26 | 2007-01-10 | 王孝亮 | Rotating fireproof isolating door |
| CN102537395A (en) * | 2012-01-01 | 2012-07-04 | 浙江石化阀门有限公司 | Electric isolating valve |
| CN104458196A (en) * | 2014-10-31 | 2015-03-25 | 中南大学 | Shutter type mechanism for generating horizontal shear airflow in conventional wind tunnel in simulation mode and method |
| US10429270B2 (en) * | 2016-02-15 | 2019-10-01 | Inclined Labs AB | Wind tunnel for human flight |
| CN106522787A (en) * | 2016-09-28 | 2017-03-22 | 中国航空规划设计研究总院有限公司 | Isolation door bearing positive pressure and negative pressure in wind tunnel |
| CN106546406A (en) * | 2016-09-28 | 2017-03-29 | 中国航空规划设计研究总院有限公司 | A kind of test section replacing options of continuous way transonic wind tunnel |
| CN106323585A (en) * | 2016-11-10 | 2017-01-11 | 中国航天空气动力技术研究院 | Pore plate capable of adjusting aperture online |
| CN108507751A (en) * | 2018-06-28 | 2018-09-07 | 中国汽车工程研究院股份有限公司 | Automotive environment wind-tunnel variable degree collection port |
| CN209372355U (en) * | 2019-02-01 | 2019-09-10 | 国电环境保护研究院有限公司 | A kind of band bypass revolving door direct current blows formula gust wind tunnel |
| CN110333044A (en) * | 2019-05-27 | 2019-10-15 | 中国空气动力研究与发展中心 | Shock tunnel air intake duct self-starting test exports pneumatic revolving door device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111060279B (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114962665B (en) | Waterproof type valve electric actuator | |
| JPH1058907A (en) | Hub for car with centralized tire expanding device, and hub holder assembly | |
| US6340029B1 (en) | Apparatus for opening/closing a valve and method thereof | |
| US20210358771A1 (en) | Pendulum valve | |
| CN101375136B (en) | Dual chamber orifice fitting isolation valve | |
| CN111060279B (en) | Rotary wind tunnel isolation door | |
| KR20120001715A (en) | Shut-off valve disposed between openings formed to vacuum chamber and method of shutting off openings of vacuum chamber | |
| CN202176748U (en) | Ball-type airlock valve | |
| CN201884777U (en) | Nuclear manual rotary drum vacuum valve | |
| CN116792510A (en) | High-tightness electric actuating mechanism | |
| CN111060278B (en) | Rotary driving device and wind tunnel isolation door | |
| CN209818753U (en) | Butterfly valve | |
| CN215568105U (en) | Floating ball valve | |
| CN115899311A (en) | Deep sea valve | |
| CN220622813U (en) | Ball valve with double seal valve seat | |
| CN219013512U (en) | Valve device | |
| CN210800085U (en) | Valve plate of sealed valve and sealed valve | |
| CN214466171U (en) | Highly-sealed butterfly valve | |
| CN210623603U (en) | Double-eccentric butterfly valve for pressure swing adsorption | |
| KR100523927B1 (en) | Valve operated by differential pressure | |
| CN214331505U (en) | Valve gate | |
| JP2004028176A (en) | Flow control device | |
| CN220706419U (en) | Stop valve with linear sealing structure | |
| CN211364228U (en) | Annular air bag door | |
| CN217576967U (en) | Drag for sediment built-in guide pulley with drainage structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |