CN110068431A - A kind of leakage test method of aerospace composite tank at low ambient temperatures - Google Patents
A kind of leakage test method of aerospace composite tank at low ambient temperatures Download PDFInfo
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- CN110068431A CN110068431A CN201910381997.2A CN201910381997A CN110068431A CN 110068431 A CN110068431 A CN 110068431A CN 201910381997 A CN201910381997 A CN 201910381997A CN 110068431 A CN110068431 A CN 110068431A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
- G01M3/205—Accessories or associated equipment; Pump constructions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of leakage test method of aerospace composite tank at low ambient temperatures, vacuum pump and helium mass spectrometer leak detector are accessed into vacuum line, to exclude influence of the helium ingredient to test result in air, and guarantee that helium mass spectrometer leak detector can collect leakage gas in test process；Vacuum pump to the space of test tank and composite material tank vacuumize until helium mass spectrometer leak detector registration be zero, inject liquid helium into composite material tank, pass through observation liquidometer registration variation；The variation of helium mass spectrometer leak detector registration is observed and recorded, the seepage property of composite material tank at low ambient temperatures is obtained.Leakage test method of the invention can highly restore locating low temperature environment when composite material tank is on active service, and realize and carry out the leakage detection of low temperature to composite material tank, provide necessary detection method for the high-quality manufacture of composite material tank.
Description
Technical field
The present invention relates to the method and technology fields of detection material seepage property to be particularly related to a kind of aerospace composite
The leakage test method of tank at low ambient temperatures.
Background technique
Space launch vehicle as can by the spaces device such as artificial satellite, space station, airship be sent into cosmic space it is important
Flight carrier is the important symbol of a National Airspace scientific and technological level.Future Spacecraft and the development trend of carrier rocket are tools
Standby high carrying capacity, while its manufacturing cost is utmostly reduced, such as inexpensive spacecraft, Reusable launch vehicles, list
Grade, which is entered the orbit, waits spacecrafts, this just needs for the transmitting total weight of spacecraft to be preferably minimized.In order to realize high delivery power, low cost boat
The development of its device it may first have to which solution is exactly the excessive problem of aircraft overall weight.Propellant tank is as carrier rocket
One of chief component, occupy very large space, be main loss of weight component.
The development of low-temperature composite material tank is the key that carry out next-generation space exploration and creation New Launch one
Step.Currently, the aviation vehicle of mainstream attempts weight and production cost that complete machine is reduced using composite material in the world,
Systems in Certain Developed Countries is successfully applied among the manufacture of aerospace craft Cryogenic tank.Traditional low temp fuel tank is big
It is all to be prepared by metal material (such as high strength alumin ium alloy etc.) by welding procedure, but with the height of composite technology
Speed development and the gradually application in aerospace field, the especially composite system of cold cycling good mechanical performance
Constantly research and development, so that becoming the main direction of development of space launch vehicle lighting without liner full composite material Cryogenic tank.It is compound
Material has higher specific strength and specific modulus compared to metal material, while having both excellent anti-fatigue performance.Composite material
Cryogenic tank can be realized loss of weight target 20-40% lower than current aluminium alloy tank, and various advanced used by it
The assembly of components can be greatly reduced in moulding process, greatly enhance production efficiency, shorten the production cycle, reach
The purpose for reducing production cost is arrived.However, due to the cryogenic media (such as liquid oxygen, liquid hydrogen) held inside space launch vehicle tank
Small molecule characteristic, material internal is easily penetrated by the manufacturing defect of tank；Meanwhile in order to maintain the liquid of low temp fuel
State, generally there are the pressure of 0.2-0.3MPa in tank, huge pressure difference and long-term alternating hot and cold circulation of bearing inside and outside cabinet are answered
The complex working conditions such as power can make material internal generate micro-crack, and the continuous of micro-crack extends and be connected to and cryogenic media can be caused to leak
The problem of, it finally results in tank and fails and destroy.Therefore, normal, low temperature is carried out to composite material tank and sample before serving to seep
The test of leakage property is very necessary.
Currently, the domestic leakage test method of composite material generallyd use is the pressure difference based on GB/T 1038-2000
Method.The method is suitable for measuring the gas transit dose and gas transmission coefficient of plastic film and thin slice.Utilize plastic film or thin
Piece separates high and low pressure chamber, and the test gas of 0.1MPa is filled with into hyperbaric chamber, with vacuum pump by low pressure after sample is sealed
Air in room is extracted into close to zero.The indoor pressure increment of low pressure is measured using manometer, that is, can determine test gas by height
Pressure chamber is through films/sheets to low-pressure chamber using the time as the gas flow of function.The method can be used for penetrating for most of gas and measure
It is fixed, there is certain universality；But the transit dose of gas needs to carry out subsequent calculation processing, complex steps and can introduce error；
Meanwhile the method can only carry out the measurement of gas transit dose under room temperature, not be related to the test of fluid seepage under low temperature.
Those skilled in the art improves the infiltration for detecting material at normal temperature or low temperature to above-mentioned test method
Performance is leaked, such as discloses one kind application No. is the application for a patent for invention of CN201610810397.X and detects at normal temperature or low temperature
The method and apparatus of material seepage property, this method and device are based on pressure differential method and fluorescence method dual principle, in test sample
Upper surface covering fluoroscopic leak test liquid and the high pressure gas for being passed through specified pressure calculate sample according to the gas pressure change of lower surface
Gas transit dose, and by ultraviolet light sample lower surface observe fluorescence leakage situation, to determine leak location.In addition,
By be mixed with fluorescer and liquid nitrogen to obtain low temperature fluoroscopic leak test liquid, it can be achieved that under low temperature material seepage property detection.
But this method still need by gas pressure change calculate sample gas transit dose, complex steps and not intuitively；Together
When, the low temperature for being only simply covered on specimen surface using mixture prepared low temperature fluoroscopic leak test liquid, therefore obtaining leaks
Testing result also has deviation.
In addition, application No. is the patent applications of CN201811612392.1 to disclose a kind of ring network cabinet SF6 gas tank helium inspection system
System and method are applicable in and carry out dry type leak detection to 10kV ring network cabinet SF6 gas tank.The system includes the vacuum for placing examined workpiece
Case leakage detection apparatus, for vacuum box leak detection device and examined workpiece fill helium and recycle helium helium recyclable device, for pair
The helium mass spectrometer leak detector that examined workpiece is hunted leak and the PLC for controlling helium recyclable device and helium mass spectrometer leak detector.Though the system
So can judge at normal temperature whether examined workpiece is qualified using helium and helium mass spectrometer detector, but the system can not be simulated
Low temperature environment required for composite material tank.
Therefore, it is necessary to be directed to seepage property and prevention of the aerospace composite tank under extremely low temperature environment for this field
Research is made in corrective measure.
Summary of the invention
The purpose of the present invention is to provide a kind of leakage test method of aerospace composite tank at low ambient temperatures,
Locating low temperature when composite material tank is on active service can not be highly restored to solve material seepage property detection method in the prior art
The problem of environment.
To achieve the above object, the leakage survey the present invention provides a kind of aerospace composite tank at low ambient temperatures
Method for testing, the test method include using a kind of leakage system safety testing device of composite material tank, and the test device includes
Liquid helium bottle, vacuum pump, helium mass spectrometer leak detector, liquidometer and the test tank for placing composite material tank, the test tank packet
Tank body and the top cover for sealing the tank body are included, the top cover is equipped with helium inlet A and exhaust outlet A, and the liquid helium bottle is logical
Piping is connected with the helium inlet A, and the vacuum pump is connected by vacuum line with the helium mass spectrometer leak detector, the helium
Mass-spectrometer leak detector is connected by vacuum line with the vacuum pumping opening of the tank body, the helium inlet A of the test tank and exhaust
Mouth A passes through pipeline respectively and is connected with the helium inlet B of the composite material tank and exhaust outlet B, the helium inlet B and exhaust
Mouth B is arranged on the upper lid of the composite material tank, and the liquidometer is arranged on the upper lid of the composite material tank
For measuring the height of the liquid helium in injection composite material tank.
The test method includes that composite material tank to be tested is placed in test tank first, by composite material tank
On helium inlet B and exhaust outlet B respectively with the liquid helium inlet A in the test tank is corresponding with exhaust outlet A is connected to, close institute
State the top cover of test tank；Then liquid helium bottle is connected to the helium inlet A in test tank by pipeline；Open vacuum pump with
Helium mass spectrometer leak detector first excludes influence of the helium ingredient to test result in air, to the test tank and the composite wood
Space between material tank be evacuated to helium mass spectrometer leak detector registration be zero or steadily lower than some numerical value when, keep vacuum pump
With the open state of helium mass spectrometer leak detector, test starts；Open liquid helium bottle valve, the small flow injection composite material storage of control liquid helium
It is pre-chilled in case, reduces rapidly composite material tank temperature, the liquid helium of volatilization can be discharged by exhaust outlet B and exhaust outlet A；One section
Liquid helium injection rate, observation liquidometer registration variation are increased after time；The variation of helium mass spectrometer leak detector registration is observed and recorded, is answered
The seepage property of condensation material tank at low ambient temperatures；After being completed, liquid helium bottle valve, vacuum pump and helium mass spectrum leak detection are closed
Instrument, liquid helium volatilizees naturally in material tank to be composite.
Preferably, liquid helium bottle valve is opened to inject before liquid helium into composite material tank, it is in the test tank and described
Space between composite material tank is evacuated to -0.05~-0.1MPa.
Preferably, it when liquid helium liquid level is higher than the 50%~60% of tank height in composite material tank, can suitably turn down
Liquid helium bottle valve, exhaust outlet A and exhaust outlet B are then always maintained at open state.
Preferably, breathable membrane is provided in the test tank, the central part of the breathable membrane is provided with for institute
State the location hole of composite material tank located lateral；The composite material tank runs through the location hole setting up and down, described multiple
The bottom plate of condensation material tank is in contact with or without the bottom plate of the test tank.
Preferably, the breathable membrane is the stainless steel plate with several ventholes, the breathable membrane level and height
Adjustably it is arranged in the test tank.
Preferably, the vacuum pumping opening is arranged on the side wall of the tank body, and the vacuum pumping opening is equipped with quick
Connector, the helium mass spectrometer leak detector are connected by vacuum line with the quick coupling.
Preferably, the front of the tank body is equipped with for monitoring whether state and each instrument numerical value of confirmation in tank normally regard
Window.
Preferably, it is additionally provided on the top cover of the test tank convenient for opening the top cover handle of the test tank, exhaust ports
Equipped with the valve for adjusting capacity size.
Preferably, the test tank is made of low-carbon alloy steel；The upper cover and bottom plate of the composite material tank are by gold
Belong to material to be made, the tank wall box between the upper cover and bottom plate is by carbon fiber resin matrix composite system
At.
Compared with the prior art, the invention has the following advantages:
The leakage test method of aerospace composite tank of the invention at low ambient temperatures, passes through vacuum pump and helium matter
Influence of the helium ingredient in leak detector exclusion air to test result is composed, between test tank and the composite material tank
Space be evacuated to helium mass spectrometer leak detector registration be zero or steadily lower than some numerical value when, open liquid helium bottle valve by liquid helium bottle
Liquid helium is injected into composite material tank；By observing the variation of pressure gauge registration, when learning that pressure reaches certain value in tank
When, the valve of liquid helium bottle is closed, stops injecting liquid helium into composite material tank, observes and records and leaked on helium mass spectrometer leak detector
The numerical value of rate can intuitively reflect the seepage property of composite material tank.The present invention is answered for locating for composite material tank
The problem of issuable cryogenic media leaks under miscellaneous extreme service condition, composite material storage can highly be restored by devising one kind
The leakage test method of case locating low temperature environment when being on active service, realizes and carries out the leakage detection of low temperature to composite material tank, surveys
Test result can accurately, intuitively reflect the seepage property of composite material tank under cryogenic conditions, be the height of composite material tank
Quality manufacture provides necessary detection device.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of the leakage system safety testing device preferred embodiment of composite material tank in the present invention；
Wherein, 1, liquid helium bottle, 2, vacuum pump, 3, vacuum line, 4, helium mass spectrometer leak detector, 5, quick coupling, 6, liquid helium note
Entrance, 7, liquidometer, 8, top cover handle, 10, exhaust outlet, 11, top cover, 12, form, 13, composite material tank, 14, test tank,
15, breathable membrane, 17, upper cover.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Referring to Fig. 1, a kind of leakage test method of aerospace composite tank of the invention, including use a kind of compound
The leakage system safety testing device of material tank, test device include liquid helium bottle 1, vacuum pump 2, helium mass spectrometer leak detector 4,7 and of liquidometer
For placing the test tank 14 of composite material tank 13, test tank includes tank body and the top cover 11 for sealed shell of tank, on top cover
Equipped with helium inlet A6 and exhaust outlet A10, liquid helium bottle is connected by pipeline with helium inlet A6, and vacuum pump passes through vacuum line 3
It is connected with helium mass spectrometer leak detector, helium mass spectrometer leak detector is connected by vacuum line 3 with the vacuum pumping opening of tank body, the helium of test tank
Inlet A6 and exhaust outlet A10 passes through pipeline respectively and is connected with the helium inlet B of composite material tank and exhaust outlet B, helium injection
Mouth B and exhaust outlet B is arranged in the upper cover 17 of composite material tank, and liquidometer is arranged in the upper cover 17 of composite material tank
For measuring the height of the liquid helium in injection composite material tank.
Test method includes that composite material tank 13 to be tested is placed in test tank 14 first, by composite material tank
On helium inlet B and exhaust outlet B respectively with the liquid helium inlet A6 in test tank is corresponding with exhaust outlet A10 is connected to, close and survey
Try the top cover 11 of tank；Then liquid helium bottle 1 is connected to the helium inlet A in test tank by pipeline；Open vacuum pump and helium matter
Leak detector is composed, influence of the helium ingredient to test result in air is first excluded, between test tank and composite material tank
Space be evacuated to helium mass spectrometer leak detector registration be zero or steadily lower than some numerical value when, keep vacuum pump and helium mass spectrum leak detection
The open state of instrument, test start；Liquid helium bottle valve is opened, is pre-chilled, makes in the small flow injection composite material tank of control liquid helium
Composite material tank temperature reduces rapidly, and the liquid helium of volatilization can be discharged by exhaust outlet B and exhaust outlet A；It is increased after a period of time
Liquid helium injection rate, observation 7 registration of liquidometer variation；The variation of helium mass spectrometer leak detector registration is observed and recorded, composite material storage is obtained
The seepage property of case at low ambient temperatures；After being completed, liquid helium bottle valve, vacuum pump and helium mass spectrometer leak detector are closed, to multiple
Liquid helium volatilizees naturally in condensation material tank.
In the present embodiment, opens liquid helium bottle valve and injected before liquid helium into composite material tank, it is in test tank and compound
Space between material tank is evacuated to -0.05~-0.1MPa.When liquid helium liquid level is higher than tank height in composite material tank
50%~60% when, can suitably turn down liquid helium bottle valve, exhaust outlet A and exhaust outlet B are then always maintained at open state.
In the present embodiment, due to that can volatilize in liquid helium injection process, the pressure in tank can be made to increase, thus in device
Middle setting exhaust outlet A and exhaust outlet B excludes the helium by volatilizing in liquid helium in time, keeps liquid helium in certain height, so that liquid
Helium keeps injection and volatilization, and forms a dynamic equilibrium process.Preferably, valve can be set in exhaust ports, to adjust
Save the size of exhaust ports exhaust；The front of tank body is equipped with form 12, is for monitoring state and each instrument numerical value of confirmation in tank
It is no normal.
The breathable membrane 15 being provided in test tank in the present embodiment, in test tank, the central part of breathable membrane are provided with
Location hole.Composite material tank can be smoothly placed in the suitable position in test tank by breathable membrane, in order to operating and
Test；The gas permeability design of partition is created to facilitate in vacuum pump work and all vacuumize side space above and below partition
Overall vacuum environment in test tank.
In a kind of specific embodiment, the tank body and top cover of test tank are made of low-carbon alloy steel.Composite material
The upper cover and bottom plate of tank are not composite structures, and typically metal structure, therefore, composite material tank it is upper
Low temperature leak at lid and bottom cover board is all relatively negligible.The present invention leaks in system safety testing device, will can directly answer
Condensation material tank 13 is placed on the bottom plate of test tank 14, and the breathable membrane 15 that location hole can also be offered by central part will answer
Condensation material tank 13 is raised, and makes the bottom surface of composite material tank 13 far from the bottom plate of test tank 14.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of leakage test method of aerospace composite tank at low ambient temperatures, which is characterized in that the test side
Method includes using a kind of leakage system safety testing device of composite material tank, and the test device includes liquid helium bottle (1), vacuum pump
(2), helium mass spectrometer leak detector (4), liquidometer (7) and the test tank (14) for placing composite material tank (13), the test
Tank includes tank body and the top cover (11) for sealing the tank body, and the top cover is equipped with helium inlet A (6) and exhaust outlet A
(10), the liquid helium bottle is connected by pipeline with the helium inlet A (6), the vacuum pump pass through vacuum line (3) with it is described
Helium mass spectrometer leak detector is connected, and the helium mass spectrometer leak detector is connected by vacuum line (3) with the vacuum pumping opening of the tank body, institute
The helium inlet A (6) and exhaust outlet A (10) for stating test tank pass through the helium inlet B of pipeline and the composite material tank respectively
It is connected with exhaust outlet B, the helium inlet B and exhaust outlet B are arranged in the upper cover (17) of the composite material tank, described
Liquidometer is arranged in the upper cover (17) of the composite material tank for measuring the height of the liquid helium in injection composite material tank
Degree；
The test method includes that composite material tank (13) to be tested is placed in test tank (14) first, by composite material
Helium inlet B on tank is corresponding with exhaust outlet A (10) with the liquid helium inlet A (6) in the test tank respectively with exhaust outlet B
Connection, closes the top cover (11) of the test tank；Then the helium inlet A on liquid helium bottle (1) and test tank is passed through into pipe
Road connection；Vacuum pump and helium mass spectrometer leak detector are opened, influence of the helium ingredient to test result in air is first excluded, to described
It is zero or steadily lower than certain that space between test tank and the composite material tank, which is evacuated to helium mass spectrometer leak detector registration,
When a numerical value, the open state of vacuum pump and helium mass spectrometer leak detector is kept, test starts；Liquid helium bottle valve is opened, liquid helium is controlled
It is pre-chilled in small flow injection composite material tank, reduces rapidly composite material tank temperature, the liquid helium of volatilization can pass through exhaust
Mouth B and exhaust outlet A discharge；Liquid helium injection rate, observation liquidometer (7) registration variation are increased after a period of time；Observe and record helium
The variation of mass-spectrometer leak detector registration, obtains the seepage property of composite material tank at low ambient temperatures；After being completed, liquid helium is closed
Bottle valve, vacuum pump and helium mass spectrometer leak detector, liquid helium volatilizees naturally in material tank to be composite.
2. leakage test method according to claim 1, which is characterized in that open liquid helium bottle valve and store to composite material
It is injected before liquid helium in case, the space in the test tank between the composite material tank is evacuated to -0.05~-
0.1MPa。
3. leakage test method according to claim 1, which is characterized in that when liquid helium liquid level is high in composite material tank
When the 50%~60% of tank height, liquid helium bottle valve can be suitably turned down, exhaust outlet A and exhaust outlet B are then always maintained at unlatching
State.
4. leakage test method according to claim 1, which is characterized in that be provided with breathable membrane in the test tank
(15), the central part of the breathable membrane is provided with for the location hole to the composite material tank located lateral；It is described multiple
Condensation material tank runs through the location hole setting up and down, and the bottom plate of the composite material tank is with or without the test tank
Bottom plate is in contact.
5. leakage test method according to claim 4, which is characterized in that the breathable membrane (15) is with several
The stainless steel plate of venthole, the breathable membrane is horizontal and height is adjustably arranged in the test tank.
6. leakage test method according to claim 1, which is characterized in that the vacuum pumping opening is arranged in the tank
On the side wall of body, the vacuum pumping opening be equipped with quick coupling (5), the helium mass spectrometer leak detector by vacuum line (3) with
The quick coupling is connected.
7. leakage test method according to claim 1, which is characterized in that the front of the tank body is equipped with for monitoring
State and each whether normal form (12) of instrument numerical value of confirmation in tank.
8. leakage test method according to claim 1, which is characterized in that also set on the top cover (11) of the test tank
Have convenient for opening the top cover handle (8) of the test tank, the valve for adjusting capacity size is equipped at exhaust outlet (10).
9. leakage test method according to claim 1, which is characterized in that the test tank is by low-carbon alloy steel
At；The upper cover and bottom plate of the composite material tank are made by metal material, between the upper cover and bottom plate
Tank wall box be made of carbon fiber resin matrix composite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910381997.2A CN110068431A (en) | 2019-05-09 | 2019-05-09 | A kind of leakage test method of aerospace composite tank at low ambient temperatures |
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| CN201910381997.2A CN110068431A (en) | 2019-05-09 | 2019-05-09 | A kind of leakage test method of aerospace composite tank at low ambient temperatures |
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Cited By (4)
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| CN110530584A (en) * | 2019-08-29 | 2019-12-03 | 潍坊路加精工有限公司 | A kind of waterproof ventilated membrane sealing performance automated testing method and equipment |
| CN113390920A (en) * | 2021-06-25 | 2021-09-14 | 连云港中远海运特种装备制造有限公司 | Heat-insulating material performance testing device and testing method |
| CN116124377A (en) * | 2023-04-04 | 2023-05-16 | 西安恒茂动力科技有限公司 | Ultra-low temperature leakage testing device for aerospace composite material |
| CN116930041A (en) * | 2023-09-13 | 2023-10-24 | 江苏君澄空间科技有限公司 | Leakage testing system and method for composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110530584B (en) * | 2019-08-29 | 2021-06-29 | 歌尔股份有限公司 | Automatic testing method and equipment for sealing performance of waterproof breathable film |
| CN113390920A (en) * | 2021-06-25 | 2021-09-14 | 连云港中远海运特种装备制造有限公司 | Heat-insulating material performance testing device and testing method |
| CN116124377A (en) * | 2023-04-04 | 2023-05-16 | 西安恒茂动力科技有限公司 | Ultra-low temperature leakage testing device for aerospace composite material |
| CN116930041A (en) * | 2023-09-13 | 2023-10-24 | 江苏君澄空间科技有限公司 | Leakage testing system and method for composite material |
| CN116930041B (en) * | 2023-09-13 | 2023-12-08 | 江苏君澄空间科技有限公司 | Leakage testing system and method for composite material |
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