CN110068429A - A kind of leakage test method of aerospace composite component at low ambient temperatures - Google Patents
A kind of leakage test method of aerospace composite component at low ambient temperatures Download PDFInfo
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- CN110068429A CN110068429A CN201910377952.8A CN201910377952A CN110068429A CN 110068429 A CN110068429 A CN 110068429A CN 201910377952 A CN201910377952 A CN 201910377952A CN 110068429 A CN110068429 A CN 110068429A
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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 component 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 hermetically sealed can vacuumize until helium mass spectrometer leak detector registration be zero, liquid helium is injected into hermetically sealed can, 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 at low ambient temperatures is obtained.Leakage test method of the invention can highly restore locating low temperature environment when large-scale aerospace composite component is on active service, it realizes and the leakage detection of low temperature is carried out to composite element, provide necessary detection method for the high-quality manufacture and the research and development for the composite system of resistance to extreme environment of large-scale aerospace composite component.
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 component 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 improve for seepage property of the aerospace composite component under extremely low temperature and prevention for this field
Research is made in measure.
Summary of the invention
The purpose of the present invention is to provide a kind of leakage test method of aerospace composite component at low ambient temperatures,
Large-scale aerospace composite component can not be highly restored to solve composite material seepage property detection method in the prior art
When military service the problem of locating low temperature environment.
To achieve the above object, the leakage survey the present invention provides a kind of aerospace composite component at low ambient temperatures
Method for testing, the test method include the leakage system safety testing device using a kind of composite element, and the test device includes
Liquid helium bottle, vacuum pump, helium mass spectrometer leak detector, liquidometer, test tank and the hermetically sealed can for placing composite element, the survey
Trying tank includes tank body and the top cover for sealing the tank body, breathable membrane is provided in the tank body, the top cover is equipped with
Helium inlet A and exhaust outlet A, the liquid helium bottle are connected by pipeline with the helium inlet A, and the vacuum pump passes through vacuum tube
Road is connected with the helium mass spectrometer leak detector, and the helium mass spectrometer leak detector passes through the vacuum pumping opening phase of vacuum line and the tank body
Even, the hermetically sealed can is arranged on the breathable membrane, and the bottom plate of the hermetically sealed can is equipped with step aperture, the composite material
Component setting is tightly connected in the step tapping and with the hermetically sealed can, the helium inlet B and exhaust outlet B of the hermetically sealed can
It is connected respectively by pipeline with the helium inlet A of the test tank and exhaust outlet A, the helium inlet B and exhaust outlet B are respectively provided with
On the upper lid of the hermetically sealed can, the liquidometer is arranged on the upper lid of the hermetically sealed can for measuring in injection hermetically sealed can
The height of liquid helium；
The test method includes that composite element to be tested is placed in the sealing that bottom has step aperture first
In tank, and the composite element to be tested and step tapping are tightly connected, hermetically sealed can is put in test tank
Breathable membrane on, by hermetically sealed can helium inlet B and exhaust outlet B respectively in the test tank helium inlet A and row
The corresponding connection of port A, closes the top cover of the test tank；Then liquid helium bottle and the helium inlet A in test tank are passed through
Pipeline 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 institute
The space between test tank and the hermetically sealed can is stated to vacuumize until helium mass spectrometer leak detector registration is zero or steadily lower than some
When numerical value, the open state of vacuum pump and helium mass spectrometer leak detector is kept, test starts；Liquid helium bottle valve is opened, control liquid helium is small
It is pre-chilled in flow injection hermetically sealed can, reduces rapidly the temperature in hermetically sealed can, the liquid helium of volatilization can pass through exhaust outlet B and exhaust outlet
A discharge；Liquid helium injection rate, observation liquidometer registration variation are increased after a period of time；Observe and record helium mass spectrometer leak detector registration
Variation, obtains the seepage property of composite element at low ambient temperatures；After being completed, liquid helium bottle valve, vacuum pump are closed
And helium mass spectrometer leak detector, liquid helium volatilizees naturally in tank to be sealed.
Preferably, liquid helium bottle valve is opened to inject before liquid helium into hermetically sealed can, the test tank and the hermetically sealed can it
Between space be evacuated to -0.05~-0.1MPa.
Preferably, when liquid helium liquid level is higher than the 50%~60% of hermetically sealed can height in hermetically sealed can, liquid helium can suitably be turned down
Bottle valve, exhaust outlet A and exhaust outlet B are then always maintained at open state.
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 step aperture includes the first aperture recessed down at the top of hermetically sealed can bottom plate and from the first aperture
Bottom surface downward through the sealing tank bottom the second aperture, the shape of first aperture and the composite element
Shape is adapted, and the supporting table for being used to support the composite element is formed between second aperture and the first aperture
Rank.
Preferably, the composite element is arranged on support level, the composite element by sealant with
The sealing tank bottom is tightly connected.
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.
Compared with the prior art, the invention has the following advantages:
The leakage test method of aerospace composite component of the invention at low ambient temperatures, by vacuum pump and helium mass spectrum
Leak detector accesses vacuum line, to exclude influence of the helium ingredient to test result in air, and guarantees helium in test process
Mass-spectrometer leak detector can collect leakage gas；Vacuum pump vacuumizes the space between test tank and hermetically sealed can until helium mass spectrum is examined
When leakage instrument registration is zero or is steadily lower than some numerical value, liquid helium bottle valve is opened, the small flow of control liquid helium injects in hermetically sealed can
Pre-cooling, reduces rapidly hermetically sealed can temperature, the liquid helium of volatilization can be discharged by exhaust outlet；Liquid helium injection is increased after a period of time
Amount, observes and records the numerical value of percolation ratio on helium mass spectrometer leak detector, can intuitively reflect the seepage property of composite element.
The present invention is directed to issuable cryogenic media leakage under the extreme service condition of complexity locating for large-scale aerospace composite component
The problem of, it is based on GB/T1038-2000, locating low temperature when aerospace composite component is on active service can highly be restored by devising one kind
The leakage test method of environment is realized and carries out the leakage detection of low temperature to composite element；The present invention is by introducing vacuum
Pump and helium mass spectrometer leak detector can exclude environment, the influence of gas and vapor to pressure differential method test result in material, accurate, straight
The seepage property of testpieces under the reflection different condition of sight, for the large-scale aerospace composite component composite bodies of resistance to extreme environment
The research and development of system provide necessary detection method.
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 element in the present invention；
Fig. 2 is the enlarged structure schematic diagram of hermetically sealed can in Fig. 1；
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,
16, hermetically sealed can, 17, breathable membrane, 18, composite element, 19, sealant, 20, helium inlet B, 21, exhaust outlet B, 22, on
Lid.
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 and Fig. 2, the leakage test side of a kind of aerospace composite component of the invention at low ambient temperatures
Method, test method include the leakage system safety testing device using a kind of composite element, and test device includes liquid helium bottle 1, vacuum
Pump 2, helium mass spectrometer leak detector 4, liquidometer 7, test tank 14 and the hermetically sealed can 16 for placing composite element 18, test tank packet
Tank body and the top cover 11 for sealed shell of tank are included, breathable membrane 17 is provided in tank body, top cover is equipped with helium inlet A6 and row
Port A10, liquid helium bottle are connected by pipeline with helium inlet A6, and vacuum pump is connected by vacuum line 3 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, and hermetically sealed can 16 is arranged on breathable membrane, sealing
The bottom plate of tank is equipped with step aperture, and composite element setting is tightly connected in step tapping and with hermetically sealed can, hermetically sealed can
Helium inlet B20 and exhaust outlet B21 pass through pipeline respectively and be connected with the helium inlet A6 of test tank and exhaust outlet A10, helium note
Entrance B and exhaust outlet B are arranged in the upper cover 22 of hermetically sealed can, and liquidometer is arranged in the upper cover 22 of hermetically sealed can for measuring note
Enter the height of the liquid helium in hermetically sealed can.
Test method includes that composite element 18 to be tested is placed in the hermetically sealed can that bottom has step aperture first
In 16, and composite element and step tapping to be tested are tightly connected, hermetically sealed can is put in test tank 14
On breathable membrane 17, by hermetically sealed can helium inlet B and exhaust outlet B respectively with the helium inlet A6 and exhaust outlet in test tank
The corresponding connection of A10, closes the top cover 11 of test tank；Then the helium inlet A on liquid helium bottle 1 and test tank is connected by pipeline
It is logical；Open vacuum pump and helium mass spectrometer leak detector, first exclude influence of the helium ingredient to test result in air, to test tank and
Space between hermetically sealed can vacuumizes until when helium mass spectrometer leak detector registration is zero or is steadily lower than some numerical value, keeps vacuum
The open state of pump and helium mass spectrometer leak detector, test start；Liquid helium bottle valve is opened, the small flow of control liquid helium injects in hermetically sealed can
Pre-cooling, reduces rapidly the temperature in hermetically sealed can, and the liquid helium of volatilization can be discharged by exhaust outlet B and exhaust outlet A；After a period of time
Increase liquid helium injection rate, observation 7 registration of liquidometer variation；The variation of helium mass spectrometer leak detector registration is observed and recorded, composite wood is obtained
Expect the seepage property of component at low ambient temperatures；After being completed, liquid helium bottle valve, vacuum pump and helium mass spectrometer leak detector are closed,
Liquid helium volatilizees naturally in tank to be sealed.
In the present embodiment, opens liquid helium bottle valve and injected before liquid helium into hermetically sealed can, between test tank and hermetically sealed can
Space is evacuated to -0.05~-0.1MPa.It, can when liquid helium liquid level is higher than the 50%~60% of hermetically sealed can height in hermetically sealed can
Liquid helium bottle valve suitably is turned down, 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 close
Liquid helium in sealed cans keeps injection and volatilization and forms a dynamic equilibrium process.
In the present embodiment, step aperture includes the first aperture recessed down at the top of hermetically sealed can bottom plate and opens from first
It is mutually fitted downward through the second aperture for sealing tank bottom, the shape of the first aperture with the shape of composite element 18 bottom surface in hole
Match, and forms the support level for being used to support composite element between the second aperture and the first aperture.It is multiple in the structure setting
Condensation material component can be arbitrary shape；Sealant is arranged in the periphery of composite element, makes component and sealing with composite material
It can be sealed between tank；Specifically, the size for being sized to be slightly smaller than composite element of the second aperture on tank bottom is sealed, with
Exempt from composite element to fall from tapping.Under the low-temperature condition of missile propellant application, leakage at sealant relative to
Leakage at composite element also can be ignored.
In the present embodiment, the breathable membrane 15 being provided in test tank in test tank, the central part setting of breathable membrane
There is location hole.Hermetically sealed can be smoothly placed in the suitable position in test tank by breathable membrane, in order to operate and test；
The gas permeability design of partition is created in test tank to facilitate in vacuum pump work and all vacuumize down space on partition
Overall vacuum environment.
In the present embodiment, test tank and hermetically sealed can are made of low-carbon alloy steel.
In the present embodiment, valve has can be set in exhaust ports A, to adjust the size being vented at exhaust outlet A.Test
Whether the front of tank is equipped with form 12, normal for monitoring state and each instrument numerical value of confirmation in tank.
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 component at low ambient temperatures, which is characterized in that the test side
Method includes the leakage system safety testing device using a kind of composite element, and the test device includes liquid helium bottle (1), vacuum pump
(2), helium mass spectrometer leak detector (4), liquidometer (7), test tank (14) and the hermetically sealed can for placing composite element (18)
(16), the test tank includes tank body and the top cover (11) for sealing the tank body, is provided with breathable membrane in the tank body
(17), the top cover is equipped with helium inlet A (6) and exhaust outlet A (10), and the liquid helium bottle passes through pipeline and the helium inlet
A (6) is connected, and the vacuum pump is connected by vacuum line (3) with the helium mass spectrometer leak detector, and the helium mass spectrometer leak detector passes through
Vacuum line (3) is connected with the vacuum pumping opening of the tank body, and the hermetically sealed can (16) is arranged on the breathable membrane, described
The bottom plate of hermetically sealed can is equipped with step aperture, composite element setting the step tapping and with the hermetically sealed can
It is tightly connected, the helium inlet B (20) and exhaust outlet B (21) of the hermetically sealed can are infused by pipeline and the helium of the test tank respectively
Entrance A (6) is connected with exhaust outlet A (10), and the helium inlet B and exhaust outlet B are arranged at the upper cover (22) of the hermetically sealed can
On, the liquidometer is arranged in the upper cover (22) of the hermetically sealed can for measuring the height of the liquid helium in injection hermetically sealed can；
The test method includes that composite element (18) to be tested is placed in the sealing that bottom has step aperture first
In tank (16), and the composite element to be tested and step tapping are tightly connected, hermetically sealed can is put in test
On breathable membrane (17) in tank (14), by hermetically sealed can helium inlet B and exhaust outlet B respectively with the helium in the test tank
Inlet A (6) connection corresponding with exhaust outlet A (10), closes the top cover (11) of the test tank；Then by liquid helium bottle (1) and survey
The helium inlet A tried on tank is connected to by pipeline；Vacuum pump and helium mass spectrometer leak detector are opened, the helium in air is first excluded
Influence of the ingredient to test result vacuumizes the space between the test tank and the hermetically sealed can until helium mass spectrometer leak detector
When registration is zero or is steadily lower than some numerical value, the open state of vacuum pump and helium mass spectrometer leak detector is kept, test starts；It beats
Liquid helium bottle valve is opened, is pre-chilled in the small flow injection hermetically sealed can of control liquid helium, reduces rapidly the temperature in hermetically sealed can, the liquid of volatilization
Helium can be discharged by exhaust outlet B and exhaust outlet A；Liquid helium injection rate, observation liquidometer (7) registration variation are increased after a period of time；
The variation of helium mass spectrometer leak detector registration is observed and recorded, the seepage property of composite element at low ambient temperatures is obtained；It tests
Bi Hou closes liquid helium bottle valve, vacuum pump and helium mass spectrometer leak detector, and liquid helium volatilizees naturally in tank to be sealed.
2. leakage test method according to claim 1, which is characterized in that open liquid helium bottle valve and infused into hermetically sealed can
Before entering liquid helium, the space between the test tank and the hermetically sealed can 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 higher than sealing in hermetically sealed can
Tank height 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.
4. leakage test method according to claim 1, 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.
5. 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.
6. leakage test method according to claim 1, which is characterized in that the step aperture includes from hermetically sealed can bottom
At the top of plate the first aperture recessed down and from the bottom surface of the first aperture downward through the second aperture of the sealing tank bottom, institute
The shape for stating the first aperture is adapted with the shape of the composite element (18), and second aperture and the first aperture it
Between formed and be used to support the support level of the composite element.
7. leakage system safety testing device according to claim 6, which is characterized in that the composite element setting is supporting
On step, the composite element is tightly connected by sealant (19) and the sealing tank bottom.
8. 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.
9. 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 A (10).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377952.8A CN110068429B (en) | 2019-05-08 | 2019-05-08 | Method for testing leakage performance of aerospace composite material component in low-temperature environment |
| PCT/CN2020/089109 WO2020224632A1 (en) | 2019-05-08 | 2020-05-08 | Method for testing leakage performance of aerospace composite material member in low temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377952.8A CN110068429B (en) | 2019-05-08 | 2019-05-08 | Method for testing leakage performance of aerospace composite material component in low-temperature environment |
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| CN110068429A true CN110068429A (en) | 2019-07-30 |
| CN110068429B CN110068429B (en) | 2020-03-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110927039A (en) * | 2019-11-29 | 2020-03-27 | 大连理工大学 | Device for detecting leakage performance of material in high-low temperature cycle mode and detection method thereof |
| CN111238732A (en) * | 2020-03-31 | 2020-06-05 | 崔海军 | Aviation sealing element sealing performance detection method and detection device |
| WO2020224632A1 (en) * | 2019-05-08 | 2020-11-12 | 中南大学 | Method for testing leakage performance of aerospace composite material member in low temperature environment |
| CN113670794A (en) * | 2021-09-06 | 2021-11-19 | 北京理工大学 | Material leakage characteristic characterization system and method in ultralow temperature environment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL3877737T3 (en) * | 2018-11-27 | 2023-02-27 | West Pharmaceutical Services, Inc. | System and method for testing closure integrity of a sealed container at cryogenic temperatures |
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| CN110927039A (en) * | 2019-11-29 | 2020-03-27 | 大连理工大学 | Device for detecting leakage performance of material in high-low temperature cycle mode and detection method thereof |
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| CN110068429B (en) | 2020-03-13 |
| WO2020224632A1 (en) | 2020-11-12 |
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