CN113405758A - Vertical ejection scaling test device based on high-pressure air construction - Google Patents
Vertical ejection scaling test device based on high-pressure air construction Download PDFInfo
- Publication number
- CN113405758A CN113405758A CN202110643121.8A CN202110643121A CN113405758A CN 113405758 A CN113405758 A CN 113405758A CN 202110643121 A CN202110643121 A CN 202110643121A CN 113405758 A CN113405758 A CN 113405758A
- Authority
- CN
- China
- Prior art keywords
- ejection
- pressure
- valve
- air
- launching tube
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title description 2
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000001133 acceleration Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract 3
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012795 verification 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
-
- 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
- G01M9/08—Aerodynamic models
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a vertical ejection scale test device constructed based on high-pressure air, which comprises a compressed air supply system, an ejection system and a measurement and control system. The compressed air supply system is used for preparing and storing air for the test device before the test is started, and after the test is started, the compressed air supply system is used for supplying air, stopping air and adjusting the ejection system according to the instruction of the measurement and control system; when the test is started, the ejection system receives an ejection instruction of the measurement and control system, and after a specified pressure is reached, the simulation ejection system integrally ejects the cartridge; the measurement and control system sends instructions such as air supply and air stop to the compressed air supply system, and the acceleration of the simulation bomb system and the pressure and temperature in the launching tube are collected in real time in the tube discharging process of the simulation bomb system, and storage, analysis processing and result display are carried out. The invention provides a test platform for air ejection related specialties, realizes the research on dynamic parameters of a simulated ejection system in the ejection process in the launch canister, and completes the approximately uniform acceleration and low-load vertical ejection scaling test of the ejectors in the launch canister.
Description
Technical Field
The invention belongs to the technical field of air ejection, and particularly relates to a vertical ejection scaling test device constructed based on high-pressure air.
Background
The compressed air ejection technology is a novel cold emission technology and has the advantages of low cost, no pollution, flame resistance, explosion resistance, electromagnetic interference resistance, good universality, convenience in maintenance, no need of heat protection measures and the like.
In recent years, with the wide application of the compressed air ejection technology in the field of launching, scientific researchers in related fields develop more theories and simulation modeling calculation analysis aiming at dynamic parameters in the ejection process constructed based on compressed air, and lack of targeted test devices, particularly lack of low-load ejection test devices constructed based on high-pressure air, so that the comparison and verification of theories and tests cannot be realized. Therefore, it is necessary to develop a corresponding high-pressure air ejection test device, provide a test platform for air ejection related specialties, realize perfect combination of theory and test, complete research on key technology of the ejection device constructed based on compressed air, and obtain a systematic ejection theory constructed based on compressed air.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the vertical ejection scale test device constructed based on the high-pressure air overcomes the defects of the prior art, provides a test platform for air ejection major, realizes real-time measurement of parameters such as acceleration, pressure and temperature of an ejection object system in the ejection process, and completes the approximately uniform acceleration and low-load vertical ejection scale test in an ejection barrel.
The invention adopts the technical scheme for solving the technical problems that: a vertical ejection scaling test device constructed based on high-pressure air comprises: high-pressure air supply system, ejection system and survey control system, high-pressure air supply system includes: connected in turn by pipelines: the device comprises an air compressor 1, an inflation valve 2, a dryer 3, a high-pressure air tank 4, a stop valve 5, a quick valve 6 and an adjusting valve 7; the ejection system includes: the launching device comprises a support 9, a snapping rod 10, an air inlet seal head 11, a piston 12, a guide wheel 13, an ejector 14 and a launching tube 15, wherein the support 9 is used for supporting the launching tube 15, the launching tube 15 is hollow and cylindrical, the air inlet seal head 11 is arranged at the bottom of the launching tube 15, and the bottom of the air inlet seal head 11 is connected with an adjusting valve 7 through a pipeline; the piston 12 is arranged in the launching tube 15, the piston 12 is positioned at the bottom of the launching tube 15 in an initial state, and the piston 12 is connected with the air inlet end enclosure 11 through the breaking rod 10 to form a closed cavity; pressurizing the closed cavity through a pipeline at the bottom of the air inlet end socket 11, and when the pressure reaches a threshold value, breaking the snapping rod 10 to eject the piston; the guide wheel 13 is arranged on the side wall of the catapult 14, so that the catapult 14 is not contacted with the inside of the launch barrel 15 in the catapult process; the measurement and control system respectively collects the pressure, the temperature and the acceleration of the ejectors 14 in the launching tube 15 and respectively controls the opening and closing of the stop valve 5, the quick valve 6 and the regulating valve 7.
Further, the stop valve 5 adopts an electric ball valve, and the full opening and closing time is not more than 30 s; the quick valve 6 adopts a Z-shaped balanced structure, and the opening and closing time is not more than 1.5 s; the regulating valve 7 adopts a V-shaped ball valve, the displacement of a valve core is accurately controlled in a closed loop mode through a pneumatic execution structure, the pressure in the ejection cylinder is basically constant, and the full-stroke opening and closing time is not more than 2 s; the pipeline system 8 is made of galvanized steel, and the pipe diameter is not more than DN 80;
a method of ejection for the device, the method comprising:
step 1: the air compressor 1 injects gas into a high-pressure air storage tank 4 through an inflation valve 2 and a dryer 3 in advance to form a high-pressure ejection power source;
step 2: after receiving a launch preparation instruction of a measurement and control system 16, opening an electric stop valve 5, prefabricating a pressure regulating valve 7 after the stop valve 5 is in place, opening a quick valve 6 and the pressure regulating valve 7 in sequence after prefabrication is finished, quickly introducing high-pressure gas into a launch barrel 15 along a pipeline system 8, and establishing launch pressure in a closed cavity between a piston 12 at the bottom of the launch barrel 15 and an air inlet end enclosure 11;
and step 3: the compressed air in the high-pressure air storage tank 4 is rapidly and continuously injected into the closed cavity, and the closed cavity is continuously raised; when the tensile force of the pressure acting on the breaking rod 10 reaches the designed breaking force, the breaking rod 10 is broken, the piston 12 starts to push the ejectors 14 to move along the launching tube 15 and to be discharged out of the tube, the measurement and control system 16 collects the pressure and the temperature in the launching tube 15 and the acceleration on the ejectors 14 in real time in the ejection process, and after the ejectors 14 are discharged out of the tube, the measurement and control system 16 closes the quick valve, the stop valve and the pressure regulating valve in sequence.
Compared with the prior art, the invention has the following gain effects:
(1) the invention provides a test platform for air ejection related specialties, particularly high-pressure air ejection specialties, simulates an ejection process, measures parameters such as acceleration and rotation conditions of an ejection system in an ejection barrel, temperature and pressure in the barrel in real time, realizes dynamic characteristic research of the ejection process of the ejection system in the ejection barrel, provides comparison data for theoretical analysis, and finally realizes a scaling test of the ejection process in the ejection barrel.
(2) The invention accurately controls the valve core displacement of the pressure regulating valve through the pneumatic execution structure, realizes the closed-loop control of the pressure regulating valve in a short time, meets the requirements of the ejection system on approximately uniform acceleration and low-load motion, and effectively reduces the impact in the motion process of the ejection system;
(3) the data acquisition system, the acceleration sensor and the gyroscope are fixed on the ejection object system, so that offline acquisition is realized, the damage rate of the acceleration sensor, the gyroscope and other equipment is effectively reduced, and the economical efficiency of the system is improved.
Drawings
FIG. 1 is a schematic diagram of a test apparatus;
fig. 2 is a three-dimensional view of the ejection system;
fig. 3 is a cross-sectional view of the ejection system;
figure 4 is an enlarged partial view of a cross-sectional view of the ejection system.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A vertical ejection scale test device constructed based on high-pressure air is disclosed, as shown in figures 1 and 2, and comprises: the device comprises an air compressor 1, an inflation valve 2, a dryer 3, a high-pressure air tank 4, a stop valve 5, a quick valve 6, an adjusting valve 7, a pipeline system 8, a support 9, a snapping rod 10, an air inlet seal head 11, a piston 12, a guide wheel 13, an ejection object 14, a launching tube 15 and a measurement and control system 16.
The stop valve 5 is connected with the high-pressure gas tank 5 through a pipeline, the quick valve 6 is positioned at the downstream of the stop valve 5 and is connected with the stop valve 6 through a pipeline, and the regulating valve 7 is positioned at the downstream of the quick valve 6 and is connected with an ejection system through a pipeline;
the stop valve 5 adopts an electric ball valve, and the full opening and closing time is not more than 30 s;
the quick valve 6 adopts a Z-shaped balanced structure, and the opening and closing time is not more than 1.5 s;
the regulating valve 7 adopts a V-shaped ball valve, the displacement of a valve core is accurately controlled in a closed loop mode through a pneumatic execution structure, the pressure in the ejection cylinder is basically constant, and the full-stroke opening and closing time is not more than 2 s;
the pipeline system 8 is made of galvanized steel, and the pipe diameter is not more than DN 80;
one end of the support 9 is fixed on the ground through 4 support rods, and the other end of the support is fixed in the middle of the first section of launching tube through a flange;
the breaking rod 10, namely a device for locking the movement of the piston, is designed to be replaceable, one end of the breaking rod is fixed on the air inlet end socket 11, the other end of the breaking rod is fixed on the piston 12, after the ejection system starts to work, when the acting force of high-pressure air overcomes the tensile force of the breaking rod 10, the breaking rod 10 is broken, the piston 12 starts to move, and the device can ensure that the piston 12 is ejected under certain starting pressure;
the air inlet end socket 11 is hemispherical and is connected with the launching tube 15, and an air inlet hole is formed in the end socket 11 and is communicated with a pipeline behind the pressure regulating valve 7;
the piston 12 is provided with a plurality of sealing grooves; the outer diameter of the piston is 1mm smaller than the inner diameter of the launching tube, and brush type sealing is adopted; the end part is rounded to prevent scraping with the cylinder body; the radial rib plates are adopted for reinforcement, and the radial rib plates are in plane contact with the tail part of the ejection object 14; the piston 12 adopts a self-aligning structure to ensure that the piston cannot tip over;
the guide wheel 13 is elastically supported and tightly propped against the inner wall surface of the launching tube 15.
The ejection object 14 is a scaled model of a certain model, has a certain thickness, meets the requirements of resistance reduction, dynamic balance and the like, and is connected with the inner wall of the launch barrel 15 through an upper guide wheel 13 and a lower guide wheel 13; a manhole is formed in the ejection object 14, so that a pressure sensor, an acceleration sensor, a gyroscope, a miniature data collector and the like can be conveniently installed;
the launch canister 15 is welded by carbon steel and is divided into a plurality of sections. The lowest cylinder body is provided with a sealing groove to seal with the piston, so that the pressure of the air chamber can be quickly established. And the inner cylinder is precisely machined, and the cylindricity, straightness tolerance and interface tolerance are guaranteed. The total coaxiality tolerance after installation is within 2 mm. And each section is connected by adopting a flange bolt, and is positioned by adopting a spigot, so that the butt joint coaxiality is ensured. The sealing adopts a groove and a rubber plate, and the seam is smoothly ground.
The measurement and control system 16 sends an air supply and adjustment instruction to the system, and finishes the acquisition and measurement of each parameter of the system.
The working process is as follows: firstly, the air compressor 1 injects gas into a high-pressure air storage tank 4 through an inflation valve 2 and a dryer 3 in advance to form a high-pressure ejection power source; after receiving a launch preparation instruction of a measurement and control system 16, opening an electric stop valve 5, prefabricating a pressure regulating valve 7 after the stop valve 5 is in place, opening a quick valve 6 and the pressure regulating valve 7 in sequence after prefabrication is finished, allowing high-pressure gas to quickly enter a launch barrel 15 along a pipeline system 8, and establishing launch pressure at the bottom of the launch barrel 15; the compressed air in the high-pressure air storage tank 4 is rapidly and continuously injected into the launching tube 15, and the pressure in the tube is continuously increased; when the tensile force applied to the breaking rod 10 by the pressure reaches the designed breaking force, the breaking rod 10 is broken, the piston 12 starts to push the ejectors 14 to move along the launching tube 15 and to be discharged out of the tube, wherein the guide wheel 13 has the function of connecting the ejectors 14 with the launching tube 15 to guide the ejectors 14, the measurement and control system 16 collects parameters such as the pressure and the temperature in the launching tube 15, the acceleration on the ejectors 14 and parameters such as a gyroscope in real time in the ejection process, and after the ejectors 14 are discharged out of the tube, the measurement and control system 16 closes the quick valve, the stop valve and the pressure regulating valve in sequence.
Claims (3)
1. A vertical ejection scaling test device constructed based on high-pressure air comprises: high-pressure air supply system, ejection system and survey control system, high-pressure air supply system includes: connected in turn by pipelines: the device comprises an air compressor 1, an inflation valve 2, a dryer 3, a high-pressure air tank 4, a stop valve 5, a quick valve 6 and an adjusting valve 7; the ejection system includes: the launching device comprises a support 9, a snapping rod 10, an air inlet seal head 11, a piston 12, a guide wheel 13, an ejector 14 and a launching tube 15, wherein the support 9 is used for supporting the launching tube 15, the launching tube 15 is hollow and cylindrical, the air inlet seal head 11 is arranged at the bottom of the launching tube 15, and the bottom of the air inlet seal head 11 is connected with an adjusting valve 7 through a pipeline; the piston 12 is arranged in the launching tube 15, the piston 12 is positioned at the bottom of the launching tube 15 in an initial state, and the piston 12 is connected with the air inlet end enclosure 11 through the breaking rod 10 to form a closed cavity; pressurizing the closed cavity through a pipeline at the bottom of the air inlet end socket 11, and when the pressure reaches a threshold value, breaking the snapping rod 10 to eject the piston; the guide wheel 13 is arranged on the side wall of the catapult 14, so that the catapult 14 is not contacted with the inside of the launch barrel 15 in the catapult process; the measurement and control system respectively collects the pressure, the temperature and the acceleration of the ejectors 14 in the launching tube 15 and respectively controls the opening and closing of the stop valve 5, the quick valve 6 and the regulating valve 7.
2. The vertical ejection scale test device constructed based on high-pressure air as claimed in claim 1, wherein the stop valve 5 is an electric ball valve, and the full opening and closing time is not more than 30 s; the quick valve 6 adopts a Z-shaped balanced structure, and the opening and closing time is not more than 1.5 s; the regulating valve 7 adopts a V-shaped ball valve, the displacement of a valve core is accurately controlled in a closed loop mode through a pneumatic execution structure, the pressure in the ejection cylinder is basically constant, and the full-stroke opening and closing time is not more than 2 s; the pipeline system 8 is made of galvanized steel, and the pipe diameter is not larger than DN 80.
3. A control method for the vertical launch scale test apparatus of claim 1, the method comprising:
step 1: the air compressor 1 injects gas into a high-pressure air storage tank 4 through an inflation valve 2 and a dryer 3 in advance to form a high-pressure ejection power source;
step 2: after receiving a launch preparation instruction of a measurement and control system 16, opening an electric stop valve 5, prefabricating a pressure regulating valve 7 after the stop valve 5 is in place, opening a quick valve 6 and the pressure regulating valve 7 in sequence after prefabrication is finished, quickly introducing high-pressure gas into a launch barrel 15 along a pipeline system 8, and establishing launch pressure in a closed cavity between a piston 12 at the bottom of the launch barrel 15 and an air inlet end enclosure 11;
and step 3: the compressed air in the high-pressure air storage tank 4 is rapidly and continuously injected into the closed cavity, and the closed cavity is continuously raised; when the tensile force of the pressure acting on the breaking rod 10 reaches the designed breaking force, the breaking rod 10 is broken, the piston 12 starts to push the ejectors 14 to move along the launching tube 15 and to be discharged out of the tube, the measurement and control system 16 collects the pressure and the temperature in the launching tube 15 and the acceleration on the ejectors 14 in real time in the ejection process, and after the ejectors 14 are discharged out of the tube, the measurement and control system 16 closes the quick valve, the stop valve and the pressure regulating valve in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643121.8A CN113405758A (en) | 2021-06-09 | 2021-06-09 | Vertical ejection scaling test device based on high-pressure air construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643121.8A CN113405758A (en) | 2021-06-09 | 2021-06-09 | Vertical ejection scaling test device based on high-pressure air construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113405758A true CN113405758A (en) | 2021-09-17 |
Family
ID=77683257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110643121.8A Pending CN113405758A (en) | 2021-06-09 | 2021-06-09 | Vertical ejection scaling test device based on high-pressure air construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113405758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964693A (en) * | 2022-05-20 | 2022-08-30 | 中国科学院力学研究所 | Shock tunnel simulation test device and method based on high-speed pneumatic ejection technology |
| CN114993598A (en) * | 2022-05-20 | 2022-09-02 | 中国科学院力学研究所 | Time calibration method and device for shock tunnel dynamic test |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743589Y (en) * | 2005-03-15 | 2005-11-30 | 北京吉信气弹簧制品有限公司 | Mechanical spring booster supporting rod air spring |
| RU50293U1 (en) * | 2005-07-12 | 2005-12-27 | Санкт-Петербургский государственный университет | PNEUMATIC MATERIAL DELIVERY DEVICE |
| CN101487781A (en) * | 2009-02-25 | 2009-07-22 | 上海材料研究所 | Gas shock testing machine for detecting fragile cover of projectile storage and transportation launching tube |
| US20110048267A1 (en) * | 2009-09-03 | 2011-03-03 | Agency For Defense Development | Separation device of ejector motor for portable missile |
| CN108177791A (en) * | 2017-12-28 | 2018-06-19 | 陕西中科博亿电子科技有限公司 | Launching tube |
| CN208026450U (en) * | 2018-04-03 | 2018-10-30 | 中国航空工业集团公司西安飞机设计研究所 | Gas driven generator blowing experiment device |
| CN109539876A (en) * | 2018-11-13 | 2019-03-29 | 北京航天发射技术研究所 | A kind of compressed air ejection experimental provision of simulated missile ejection |
| CN110065634A (en) * | 2019-04-23 | 2019-07-30 | 北京理工伺服科技有限公司 | Unmanned flight robot based on the cold power-assisted transmitting of compressed gas |
| CN112556936A (en) * | 2020-12-28 | 2021-03-26 | 徐州金鼎恒立液压件有限公司 | Hydraulic sealing comprehensive experiment table and experiment method |
| CN112781823A (en) * | 2021-01-15 | 2021-05-11 | 三峡大学 | Iron tower impact test device and method based on pneumatic ejection rolling stones |
| CN112857732A (en) * | 2021-03-10 | 2021-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Method for quickly closing shock tunnel throat |
-
2021
- 2021-06-09 CN CN202110643121.8A patent/CN113405758A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743589Y (en) * | 2005-03-15 | 2005-11-30 | 北京吉信气弹簧制品有限公司 | Mechanical spring booster supporting rod air spring |
| RU50293U1 (en) * | 2005-07-12 | 2005-12-27 | Санкт-Петербургский государственный университет | PNEUMATIC MATERIAL DELIVERY DEVICE |
| CN101487781A (en) * | 2009-02-25 | 2009-07-22 | 上海材料研究所 | Gas shock testing machine for detecting fragile cover of projectile storage and transportation launching tube |
| US20110048267A1 (en) * | 2009-09-03 | 2011-03-03 | Agency For Defense Development | Separation device of ejector motor for portable missile |
| CN108177791A (en) * | 2017-12-28 | 2018-06-19 | 陕西中科博亿电子科技有限公司 | Launching tube |
| CN208026450U (en) * | 2018-04-03 | 2018-10-30 | 中国航空工业集团公司西安飞机设计研究所 | Gas driven generator blowing experiment device |
| CN109539876A (en) * | 2018-11-13 | 2019-03-29 | 北京航天发射技术研究所 | A kind of compressed air ejection experimental provision of simulated missile ejection |
| CN110065634A (en) * | 2019-04-23 | 2019-07-30 | 北京理工伺服科技有限公司 | Unmanned flight robot based on the cold power-assisted transmitting of compressed gas |
| CN112556936A (en) * | 2020-12-28 | 2021-03-26 | 徐州金鼎恒立液压件有限公司 | Hydraulic sealing comprehensive experiment table and experiment method |
| CN112781823A (en) * | 2021-01-15 | 2021-05-11 | 三峡大学 | Iron tower impact test device and method based on pneumatic ejection rolling stones |
| CN112857732A (en) * | 2021-03-10 | 2021-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Method for quickly closing shock tunnel throat |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964693A (en) * | 2022-05-20 | 2022-08-30 | 中国科学院力学研究所 | Shock tunnel simulation test device and method based on high-speed pneumatic ejection technology |
| CN114993598A (en) * | 2022-05-20 | 2022-09-02 | 中国科学院力学研究所 | Time calibration method and device for shock tunnel dynamic test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113405758A (en) | Vertical ejection scaling test device based on high-pressure air construction | |
| CN108917462B (en) | Air cannon launching device with quick release mechanism | |
| CN106353180B (en) | Explosion wave simulation device with adjustable positive pressure acting time | |
| CN103091069A (en) | Power device for model launch testing of underwater moving body | |
| CN112611255B (en) | Artillery locking machine shell-pulling test device and test method | |
| CN110749445B (en) | Ramjet direct-connected test device utilizing detonation driving technology | |
| CN109870069B (en) | Single-tube air cannon capable of continuously launching | |
| CN109724768B (en) | Hypersonic wind tunnel model interstage dynamic separation device and application thereof | |
| CN112762220B (en) | Rapid valve opening and closing device and method for large-diameter wind tunnel application | |
| US7093774B2 (en) | Device for injecting a pulsed supersonic gas stream | |
| KR102507486B1 (en) | Apparatus for removing the shaft pin from the ball screw of the aircraft landing gear | |
| CN114633899B (en) | Combined valve system of air gun for impact power test of aircraft strength test | |
| KR101564552B1 (en) | Moving model test rig using high-speed piston valve | |
| CN113959869A (en) | High-pressure gas blasting experimental device and using method | |
| CN213658218U (en) | Jet flow test device for wind tunnel model | |
| CN112444336B (en) | Thrust testing device and method for phase change generator | |
| CN115468855A (en) | Performance degradation simulation test device and method for gas-compressing energy-storing surrounding rock of abandoned mine roadway | |
| CN110426172B (en) | Middle through high-acceleration quick excitation gas gun device | |
| CN211362057U (en) | Pneumatic tensioning type seeker | |
| CN210922369U (en) | Launching device for universal large-depth submarine-launched simulated missile | |
| CN114837674A (en) | High-energy air blasting impact device and method | |
| CN108362167B (en) | Quick-development shooting device and strong-impact power generation system | |
| CN113686749A (en) | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method | |
| CN219045935U (en) | Gun barrel bore cleaning device | |
| CN110549291A (en) | pneumatic tensioning type seeker |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210917 |
|
| RJ01 | Rejection of invention patent application after publication |