CN104880368B - The test method of multi-functional pressure differential High Pressure Hydrogen and material compatibility - Google Patents
The test method of multi-functional pressure differential High Pressure Hydrogen and material compatibility Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 163
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 163
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000000463 material Substances 0.000 title claims abstract description 26
- 238000010998 test method Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 238000002474 experimental method Methods 0.000 claims abstract description 38
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 238000004880 explosion Methods 0.000 claims abstract description 12
- 238000009661 fatigue test Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 98
- 229910052786 argon Inorganic materials 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 13
- 150000002431 hydrogen Chemical class 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 239000010902 straw Substances 0.000 claims description 7
- 239000002608 ionic liquid Substances 0.000 claims description 2
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 claims 3
- 238000000926 separation method Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention relates to material mechanical performance test equipment development field, it is desirable to provide the test method of multi-functional pressure differential High Pressure Hydrogen and material compatibility.The test method of the multi-functional pressure differential High Pressure Hydrogen and material compatibility includes explosion bulge test test method, becomes hydrogen pressure fatigue test test method, constant hydrogen pressure fatigue test test method.The method that the present invention applies disk sample using the pressure difference of disk sample upper and lower surface load, avoids the servo test mechanism of complexity, and equipment volume greatly reduces, and equipment investment reduces, easy to operate, and test efficiency improves；And during experiment, the parameter such as strain and displacement of disk sample can be measured easily, corresponding testing element from high pressure hydrogen influence.
Description
Technical field
The present invention be on material mechanical performance test equipment development field, more particularly to multi-functional pressure differential High Pressure Hydrogen with
The test method of material compatibility.
Background technology
Hydrogen be fossil energy clean utilization and new energy evolution in important part.Hydrogen usually with
The form of high-pressure gaseous is stored and transported.In recent years, since High Pressure Hydrogen system pressure is high, the hair of Service Environment complication
Exhibition trend so that high pressure hydrogen system material becomes gradual protrusion with hydrogen consistency problem (i.e. hydrogen embrittlement problem).Hydrogen embrittlement can cause
The toughness of material declines, and crack propagation velocity becomes larger, and in turn results in high pressure hydrogen system and serious lose occurs suddenly during military service
Effect, the safety to the people cause very big hidden danger.In order to ensure the safety of high pressure hydrogen system, high pressure hydrogen system material is necessary
Carry out the experimental study with hydrogen compatibility.
The Study on Compatibility of metal material and High Pressure Hydrogen is carried out, (up to 100MPa) should be carried out under high pressure hydrogen environment
Measurement of Material Mechanical Performance.This just proposes corresponding experimental rig higher requirement.Many research institutions are all in the world
The research and development of material Study on Compatibility equipment in high pressure hydrogen environment are carried out, but the said equipment all suffers from following key and asks
Topic：
(1) device structure is complicated, of high cost, complicated
The hydrogen compatibility test device developed at present is on the basis of traditional material testing machine, plus being capable of providing height mostly
The environmental cabinet of hydrogen environment is pressed, sample and its fixture are contained in inside environmental cabinet, and therefore, environmental cabinet internal capacity is larger, adds
Its pressure it is usually higher (up to 100MPa), cause equipment manufacturing cost expensive.In addition, the environmental cabinet of large volume also needs to
Corresponding hydrogen air supply system is equipped with, whole equipment is complicated, and hydrogen and cost of labor are higher.Such as patent
[201110259252.2] experimental rig proposed in, not only the cost of equipment in itself is higher, and experiment needs more people's operations every time
Equipment, hydrogen gas consumption are also big.
(2) there are high pressure hydrogen movable sealing structure, easily leak
There is the load bar through hydrogen environmental cabinet in existing material and hydrogen compatibility test device, so that in environmental cabinet
The sample in portion provides loading force.In order to maintain the pressure inside environmental cabinet, load bar need to set dynamic sealing with environmental cabinet contact position
Element.And practice have shown that, the existing movable sealing structure service life is very short, often using after the short period, because abrasion and molten
The reasons such as hydrogen-expansion and fail suddenly, cause the leakage of hydrogen, there are larger security risk.
(3) the parameters measurement difficulty of sample is big in hydrogen gas environment
In hydrogen gas environment, due to being influenced by hydrogen, signal can occur seriously the measuring cell such as sample strain, power
Drift, causes the inaccuracy of measurement.
(4) there are larger difference between the stress of sample and the stress of actual components
In general, the barrel of high-pressure hydrogen storage is acted on during military service by two to stress or three-dimensional stress.It is and existing
Testing machine be typically failure behaviour of the test sample under unidirectional stress, also there are one with the actual duty status of component
Determine gap.
The content of the invention
It is a primary object of the present invention to overcome deficiency of the prior art, there is provided one kind is using disc-like wafer as examination
Sample, applies disk sample using the pressure difference of disk sample upper and lower surface the experimental method of load.Asked to solve above-mentioned technology
Topic, solution of the invention are：
The experimental rig of multi-functional pressure differential High Pressure Hydrogen and material compatibility is provided, can be under high pressure hydrogen environment (up to
Mechanics Performance Testing 100MPa) is carried out to disk sample, the experimental rig includes experiment cavity, Pneumatic booster pump, low pressure storage
Tank, high pressure storage tank, vacuum pump, hydrogen cylinder group, argon bottle group and control system module；
It is described experiment cavity include end cap, upper chamber, lower cavity, pressure ring, upper chamber, lower cavity inside in
Heart cavity forms the cavity passage of connection, between end cap and upper chamber, passes through end between upper chamber and lower cavity respectively
Bonnet bolt, upper chamber are bolted, and junction is all sealed using O-ring as sealing element, are capped energy after end cap
Realize the sealing of cavity passage；Lower cavity is on the contact surface with upper chamber, i.e., on the upper surface of lower cavity, equipped with use
In the groove of placement disk sample, and O-ring is provided between disk sample and the groove of lower cavity and is used to seal；The pressure ring
It is embedded in upper chamber, and is interference fitted with upper chamber, pressure ring is used to try to the disk being placed in lower cavity groove
Sample applies compression, and O-ring is all respectively arranged between pressure ring and upper chamber, between pressure ring and disk sample and is used to seal；
Pressure ring uses annular compression ring, and the overall diameter of pressure ring is identical with the diameter of disk sample, the interior diameter of pressure ring and upper chamber it is interior
Diameter, the interior diameter of lower cavity are identical；Upper chamber in lower cavity with being respectively arranged with upper chamber blow vent and lower part
Cavity blow vent；
The hydrogen cylinder group is used to carry the hydrogen that is for experiment, and the argon bottle group is used for the argon for providing displacement and experiment
Gas, exhaust outlet, the exhaust outlet of argon bottle group of hydrogen cylinder group are respectively connected to the air inlet of low pressure storage tank, the discharge of low pressure storage tank
Mouth is connected to Pneumatic booster pump, and Pneumatic booster pump is connected to high pressure storage tank, and the exhaust outlet of high pressure storage tank leads to upper chamber respectively
Gas port is connected with lower cavity blow vent；Upper chamber blow vent and lower cavity blow vent, which are equipped with, is directly connected to low pressure storage tank
Hydrogen circuit is put, for the hydrogen given off in upper chamber or lower cavity to be recycled to low pressure storage tank；Upper chamber blow vent
Be equipped with lower cavity blow vent and be directly connected to the replacement piping of argon bottle group, for upper chamber or lower cavity into promoting the circulation of qi
Body is replaced；Upper chamber blow vent, lower cavity blow vent are also connected with the air inlet of vacuum pump；
The hydrogen circuit of putting is equipped with upper chamber flow control valve equipped with hydrogen circuit valve is put at upper chamber blow vent
, lower cavity flow control valve is equipped with lower cavity blow vent, vavuum pump valve is equipped with the air inlet of vacuum pump, it is high
The exhaust ports of pressure storage tank are equipped with high pressure storage tank outlet valve；The exhaust ports of the hydrogen cylinder group, the exhaust ports of argon bottle group,
Valve A, valve B, valve C, valve D are respectively equipped with the air inlet of low pressure storage tank, in replacement piping；
The control system module is used to control the operation of Pneumatic booster pump and vacuum pump, the valvular aperture of institute.In fact
Existing mode can use the combination of hardware, software or hardware and software.Those skilled in the art can the function according to the present invention, it is right
Prior art means are used to realize correlation function.Due to these contents and non-invention emphasis, so it will not be repeated.
In the present invention, the upper chamber blow vent, lower cavity blow vent are additionally provided with blowdown piping, and equipped with emptying
Valve is used to control；
Branch is additionally provided between the upper chamber blow vent, lower cavity blow vent to be used to connect, and is set on branch
There is branch road valve；It is equipped with i.e. between upper chamber blow vent, lower cavity blow vent by upper chamber flow control valve, branch
The connecting pipeline of road valve, lower cavity flow control valve；
Branch is additionally provided between the exhaust outlet of the hydrogen cylinder group, the exhaust outlet of argon bottle group to be used to connect, and on branch
It is provided with valve E；I.e. the exhaust outlet of hydrogen cylinder group, argon bottle group exhaust outlet between be equipped with by valve A, valve E, valve B
Connecting pipeline, and ensure the connecting pipeline between the air inlet of the exhaust outlet of hydrogen cylinder group, low pressure storage tank by valve A, valve
Door C, the connecting pipeline between the exhaust outlet of argon bottle group, the air inlet of low pressure storage tank is by valve B, valve E, valve C.
In the present invention, the experiment cavity, low pressure storage tank, be both provided with pressure sensor in high pressure storage tank, and can lead to
Cross control system module Control experiment cavity, low pressure storage tank, the pressure signal collection in high pressure storage tank.
In the present invention, the design pressure of the experiment cavity is 35~100MPa, and upper chamber and lower cavity are all
Using the cavity by austenite stainless steel making, pressure ring is used by the pressure ring of high-strength steel making of the tensile strength more than 800MPa.
Explosion bulge test test method based on the experimental rig is provided, specifically includes following step：
Step A：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement
Upper chamber and lower cavity, remove end cap, and displacement tester is arranged to disk sample using the center cavity of upper chamber
And strain detection testing device；
Step B：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches in system
After setting value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches in high pressure storage tank
Setting value；
Step C：Vacuum pump is reused to carry out after being evacuated to setting vacuum lower cavity and its attached pipeline,
Vacuum pump is closed, the hydrogen in high pressure storage tank is entered lower cavity with specific speed by lower cavity flow control valve
It is interior, until disk sample explosion, cut off hydrogen source, record burst pressure, and during experiment recording disc sample strain
And displacement；
Step D：The hydrogen in experiment cavity and pipeline is carried out after replacing at least once using argon gas, separates upper chamber
And lower cavity, take out disk sample.
Change hydrogen pressure fatigue test test method based on the experimental rig is provided, specifically includes following step：
Step E：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement
Upper chamber and lower cavity, remove end cap, and displacement tester is arranged to disk sample using the center cavity of upper chamber
And strain detection testing device；
Step F：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches in system
After setting value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches in high pressure storage tank
Setting value；
Step G：Vacuum pump is reused to carry out after being evacuated to setting vacuum lower cavity and its attached pipeline,
Vacuum pump is closed, the hydrogen in high pressure storage tank is entered lower cavity with specific speed by lower cavity flow control valve
It is interior, until pressure reaches after the test pressure upper limit (the test pressure upper limit is less than the burst pressure of disk sample), stop being flushed with hydrogen, and
Afterwards by the hydrogen discharge in lower cavity to low pressure storage tank, after when lower part, cavity internal pressure reaches test pressure lower limit, stop putting
Hydrogen, then continuously repeat it is above-mentioned be flushed with hydrogen, put hydrogen process, until disk sample destroy；
Step H：The fatigue life cycle of experience before recording disc sample destroys, using argon gas in experiment cavity and pipeline
Hydrogen carry out after replacing at least once, separate upper chamber and lower cavity, take out disk sample.
Constant hydrogen pressure fatigue test test method based on the experimental rig is provided, specifically includes following step：
Step I：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement
Upper chamber and lower cavity, the ionic liquid that depth is 5~10mm is filled on disk sample top, then closed with bolt of cover
Engage end cap and upper chamber；
Step J：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches in system
After setting value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches in high pressure storage tank
Setting value；
Step K：Reuse vacuum pump upper chamber, lower cavity and its attached pipeline are carried out being evacuated to setting
Vacuum, then closes vacuum pump, makes the hydrogen in high pressure storage tank by lower cavity flow control valve with specific speed
Into in lower cavity, until after pressure reaches setting value, stop being flushed with hydrogen, close lower cavity flow control valve, make lower part
Hydrogen Vapor Pressure is kept constant during whole experiment in cavity；
Step L：The hydrogen in high pressure storage tank is set to enter top with specific speed by upper chamber flow control valve
In cavity, until after pressure reaches setting upper pressure limit, stop being flushed with hydrogen, then store up the hydrogen discharge in upper chamber to low pressure
Tank, when in upper chamber pressure reach setting low pressure limit after, stopping put hydrogen, then continuously repeat it is above-mentioned be flushed with hydrogen, put hydrogen process,
Until disk sample destroys；
Step M：The fatigue life cycle of experience before recording disc sample destroys, using argon gas in experiment cavity and pipeline
Hydrogen carry out after replacing at least once, separate upper chamber and lower cavity, take out disk sample.
In the present invention, the thickness of the disk sample is 0.5~2mm, disk sample using plane disk sample or
Person's straw hat shape disk sample, straw hat shape disk sample refers to the disk sample of intermediate projections, edge plane, and ensures intermediate projections
The diameter of structure is not more than the interior diameter of pressure ring.
In the present invention, the displacement tester uses linear variable difference transformer type (LVDT) displacement sensor.
In the present invention, the strain detection testing device uses resistance strain plate.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention applies disk sample using the pressure difference of disk sample upper and lower surface the method for load, avoids multiple
Miscellaneous servo test mechanism, equipment volume greatly reduce, and equipment investment reduces, easy to operate, and test efficiency improves.
2nd, avoid having used high pressure dynamic sealing element in apparatus of the present invention, the probability that hydrogen leaks can be reduced, improve
The reliability and security of device.
3rd, during the experiment of invention, the parameter such as strain and displacement of disk sample can be measured easily, accordingly
Testing element from high pressure hydrogen influence.
4th, the stress of disk sample is two to stress, than the actual clothes that traditional single load bearing sample is more bonded component
Labour state, and can come by adjusting the straw hat shape of the shape of disk sample, such as plane or intermediate projections, edge plane
Performance of the research material under different stress.
Brief description of the drawings
Fig. 1 is the general arrangement schematic diagram of the present invention.
Fig. 2 is the experiment cavity sectional view in the present invention.
Fig. 3 is displacement and strain detection testing device structure diagram.
Fig. 4 is ionic liquid schematic layout pattern.
Fig. 5 is plane disk sample schematic diagram.
Fig. 6 is straw hat shape disk sample schematic diagram.
Reference numeral in figure is：1 hydrogen cylinder group；2 low pressure storage tanks；3 put hydrogen circuit valve；4 Pneumatic booster pumps；5 high pressures
Storage tank；6 put hydrogen circuit；7 emptying valves；8 vavuum pump valves；9 vacuum pumps；10 upper chamber flow control valves；11 end caps；12
Upper chamber；13 lower cavities；14 lower cavity flow control valves；15 branch road valves；16 high pressure storage tank outlet valves；17 controls
System module；18 replacement pipings；19 argon bottle groups；20 bolt of cover；21 upper chamber bolts；22O type circles；23 disk samples；
24 pressure rings；25 upper chamber blow vents；26 lower cavity blow vents；27 displacement testers；28 strain detection testing devices；29 ions
Liquid；30 plane disk samples；31 straw hat shape disk samples.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Multi-functional pressure differential High Pressure Hydrogen as shown in Figure 1 and the experimental rig of material compatibility, including it is experiment cavity, pneumatic
Booster pump 4, low pressure storage tank 2, high pressure storage tank 5, vacuum pump 9, hydrogen cylinder group 1, argon bottle group 19 and control system module 17.The examination
Experiment device, as sample, (up to 100MPa) can utilize following table on disk sample 23 using disc-like wafer under high pressure hydrogen environment
The pressure difference in face, applies load to disk sample 23 and carries out Mechanics Performance Testing.
As shown in Fig. 2, the experiment cavity includes end cap 11, upper chamber 12, lower cavity 13, pressure ring 24, test cavity
The design pressure of body is 35~100MPa；Upper chamber 12 and lower cavity 13 are by anti-hydrogen embrittlement austenitic stainless steel of good performance
Manufacture, with the life and reliability of guarantee test cavity；Pressure ring 24 is by high-strength steel making, to ensure that it can apply disk sample 23
Fill up enough compression.Upper chamber 12, lower cavity 13 inside center cavity formed connection cavity passage, end cap 11 with
Connected respectively by bolt of cover 20, upper chamber bolt 21 between upper chamber 12, between upper chamber 12 and lower cavity 13
Connect, and junction is all sealed using O-ring 22 as sealing element, and the close of cavity passage can be realized after being capped end cap 11
Envelope.In explosion bulge test and become in hydrogen pressure fatigue test, end cap 11 can remove, and can then pass through the sky at 12 center of upper chamber
Chamber passage arrangement displacement tester 27, strain detection testing device 28, and then it is corresponding during experiment to measure disk sample 23
Parameters variation.
Lower cavity 13 with the contact surface of upper chamber 12, i.e., on the upper surface of lower cavity 13, equipped with for putting
The groove of disk sample 23 is put, and O-ring 22 is provided between disk sample 23 and the groove of lower cavity 13 and is used to seal.It is described
Pressure ring 24 is embedded in upper chamber 12, and is interference fitted with upper chamber 12, and pressure ring 24 is used for being placed on lower cavity 13
Disk sample 23 in groove applies compression, between pressure ring 24 and upper chamber 12, between pressure ring 24 and disk sample 23 all
O-ring 22 is respectively arranged with to be used to seal.Pressure ring 24 uses annular compression ring, the overall diameter of pressure ring 24 and the diameter of disk sample 23
Identical, the interior diameter of pressure ring 24 is identical with the interior diameter of the interior diameter of upper chamber 12, lower cavity 13；Upper chamber 12 is with
Upper chamber blow vent 25 and lower cavity blow vent 26 are respectively arranged with portion's cavity 13.The thickness of the disk sample 23 is
0.5~2mm, disk sample 23 use plane disk sample 30 or straw hat shape disk sample 31, straw hat shape disk sample 31
Refer to the disk sample of intermediate projections, edge plane, and ensure that the diameter of intermediate projections structure is not more than the interior diameter of pressure ring 24.
The hydrogen cylinder group 1 is used to carry the hydrogen that is for experiment, and the argon bottle group 19 is used to providing displacement and experiment
Argon gas, exhaust outlet, the exhaust outlet of argon bottle group 19 of hydrogen cylinder group 1 are respectively connected to the air inlet of low pressure storage tank 2, low pressure storage tank
2 outlet is connected to Pneumatic booster pump 4, and Pneumatic booster pump 4 is connected to high pressure storage tank 5, the exhaust outlet of high pressure storage tank 5 respectively with
Upper chamber blow vent 25 is connected with lower cavity blow vent 26.Upper chamber blow vent 25 and lower cavity blow vent 26 are equipped with
Be directly connected to low pressure storage tank 2 puts hydrogen circuit 6, so that by upper in hydrogen pressure fatigue test and constant hydrogen pressure fatigue test is become
The hydrogen given off in portion's cavity 12 or lower cavity 13 is recycled to low pressure storage tank 2, avoids the waste of hydrogen.Upper chamber is led to
Gas port 25 and lower cavity blow vent 26 are equipped with the replacement piping 18 for being directly connected to argon bottle group 19, for upper chamber 12 or
Lower cavity 13 carries out gas displacement.Upper chamber blow vent 25, lower cavity blow vent 26 also connect with the air inlet of vacuum pump 9
Connect.
Upper chamber flow control valve 10 is equipped with the upper chamber blow vent 25, is set at lower cavity blow vent 26
There is lower cavity flow control valve 14, two valves are used for controlling the speed for being flushed with hydrogen, putting hydrogen.Put hydrogen circuit 6 be equipped with put hydrogen
Circuit valve 3, is equipped with vavuum pump valve 8 at the air inlet of vacuum pump 9, the exhaust ports of high pressure storage tank 5 go out equipped with high pressure storage tank
Mouth valve 16.The exhaust ports of the hydrogen cylinder group 1, the exhaust ports of argon bottle group 19, low pressure storage tank 2 air inlet at, displacement
Valve A, valve B, valve C, valve D are respectively equipped with pipeline 18.
The upper chamber blow vent 25, lower cavity blow vent 26 are additionally provided with blowdown piping, and are used equipped with emptying valve 7
In control.Branch is additionally provided between the upper chamber blow vent 25, lower cavity blow vent 26 to be used to connect, and is set on branch
It is equipped with branch road valve 15；It is equipped with i.e. between upper chamber blow vent 25, lower cavity blow vent 26 and passes through upper chamber flow control
Valve 10 processed, branch road valve 15, the connecting pipeline of lower cavity flow control valve 14.Exhaust outlet, the argon of the hydrogen cylinder group 1
Branch is additionally provided between the exhaust outlet of gas cylinders group 19 to be used to connect, and valve E is provided with branch；That is the exhaust of hydrogen cylinder group 1
Mouthful, be equipped with by valve A, valve E, the connecting pipeline of valve B between the exhaust outlet of argon bottle group 19, and ensure hydrogen cylinder group 1
Exhaust outlet, low pressure storage tank 2 air inlet between connecting pipeline pass through valve A, valve C, it is the exhaust outlet of argon bottle group 19, low
The connecting pipeline between the air inlet of storage tank 2 is pressed by valve B, valve E, valve C.
The control system module 17 be used to testing cavity, high pressure storage tank 5, in low pressure storage tank 2 pressure signal collection, gas
The operation control of dynamic booster pump 4, vacuum pump 9, and the valvular aperture control of institute.
Using above-mentioned experimental rig, the main experimental species that can be completed include explosion bulge test, become hydrogen pressure fatigue test and
Constant hydrogen presses fatigue test.To the use of displacement tester 27 and strain detection testing device 28 involved in following experiments.Displacement is surveyed
Trial assembly puts 27 and uses linear variable difference transformer type (LVDT) displacement sensor.Strain detection testing device 28 is strained using resistance-type
Piece.
Explosion bulge test is continued with the pressure difference of certain 23 upper and lower surface of speed increase disk sample, until disk explosion,
Obtain corresponding burst pressure.As shown in Figure 1, Figure 2 and Figure 3, the explosion bulge test test method based on the experimental rig is specific
Comprise the following steps：
Step A：Upper chamber 12 and lower cavity 13 are separated, after having installed disk sample 23, with upper chamber bolt 21
Tight engagement upper chamber 12 and lower cavity 13, remove end cap 11, using the center cavity of upper chamber 12 to disk sample
23 arrangement displacement testers 27 and strain detection testing device 28；
Step B：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump 9, until vacuum reaches in system
To after setting value, high pressure hydrogen is carried out to high pressure storage tank 5 using Pneumatic booster pump 4 and is filled, until Hydrogen Vapor Pressure in high pressure storage tank 5
Reach setting value；
Step C：Reuse vacuum pump 9 lower cavity 13 and its attached pipeline are carried out being evacuated to setting vacuum
Degree, then closes vacuum pump 9, keeps branch road valve 15 to close, and opens high pressure storage tank outlet valve 16 and lower cavity flow control
Valve 14, makes the hydrogen in high pressure storage tank 5 enter with specific speed in lower cavity 13, until 23 explosion of disk sample, and
Cut off hydrogen source immediately afterwards, record burst pressure, and during experiment recording disc sample 23 strain and displacement；
Step D：The hydrogen in respective line is carried out after replacing several times using argon gas by replacement piping 18, in separation
Portion's cavity 12 and lower cavity 13, take out disk sample 23.
It is charged and discharged come to disk application circulation by only being circulated in 23 side of disk sample to become hydrogen pressure fatigue test
Load, after certain number repeatedly, disk ruptures, in the process, Hydrogen Vapor Pressure suffered by disk sample 23 and its
The load born is positively related.As shown in Figure 1, Figure 2 and Figure 3, the change hydrogen pressure fatigue test based on the experimental rig is surveyed
Method for testing specifically includes following step：
Step E：Upper chamber 12 and lower cavity 13 are separated, after having installed disk sample 23, with upper chamber bolt 21
Tight engagement upper chamber 12 and lower cavity 13, remove end cap 11, using the center cavity of upper chamber 12 to disk sample
23 arrangement displacement testers 27 and strain detection testing device 28；
Step F：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump 9, until vacuum reaches in system
To after setting value, high pressure hydrogen is carried out to high pressure storage tank 5 using Pneumatic booster pump 4 and is filled, until Hydrogen Vapor Pressure in high pressure storage tank 5
Reach setting value；
Step G：Reuse vacuum pump 9 lower cavity 13 and its attached pipeline are carried out being evacuated to setting vacuum
Degree, then closes vacuum pump 9, keeps branch road valve 15, upper chamber flow control valve 10, puts hydrogen circuit valve 3 and emptying
Valve 7 is closed, and opens high pressure storage tank outlet valve 16 and lower cavity flow control valve 14, make hydrogen in high pressure storage tank 5 with
Specific speed enters in lower cavity 13, until pressure reaches after the test pressure upper limit (on test pressure in lower cavity 13
Burst pressure of the limit less than disk sample 23), high pressure storage tank outlet valve 16 is closed, branch road valve 15 is opened and puts hydrogen circuit valve
3, make the hydrogen discharge in lower cavity 13 into low pressure storage tank 2, when the pressure in lower cavity 13 reaches test pressure lower limit
Afterwards, close branch road valve 15 and put hydrogen circuit valve 3, be then again turned on high pressure storage tank outlet valve 16 and lower cavity 13 is carried out
Be flushed with hydrogen, be iteratively repeated it is above-mentioned be flushed with hydrogen, put hydrogen process, until disk sample 23 destroys；
Step H：The fatigue life cycle of experience before recording disc sample 23 destroys, argon gas pair is used by replacement piping 18
Hydrogen in respective line is carried out after replacing several times, separates upper chamber 12 and lower cavity 13, takes out disk sample 23.
The Hydrogen Vapor Pressure that is born of disk sample 23 is constant during constant hydrogen pressure fatigue test, but its load for being born
Generation circulation change.In the process, it is only round since ionic liquid 29 has completely cut off contact of 23 upper surface of disk sample with hydrogen
The lower surface of disk sample 23 is contacted with the hydrogen of constant pressure；The load that disk sample 23 is born is with hydrogen in upper chamber 12
The circulation change of atmospheric pressure and change.As shown in Figure 1, Figure 2 and Figure 4, the constant hydrogen pressure fatigue based on the experimental rig
Testing method specifically includes following step：
Step I：Upper chamber 12 and lower cavity 13 are separated, after having installed disk sample 23, with upper chamber bolt 21
Tight engagement upper chamber 12 and lower cavity 13, the ionic liquid 29 that depth is 5~10mm is poured on 23 top of disk sample,
Then with 20 tight engagement end cap 11 of bolt of cover and upper chamber 12；
Step J：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump 9, until vacuum reaches in system
To after setting value, high pressure hydrogen is carried out to high pressure storage tank 5 using Pneumatic booster pump 4 and is filled, until Hydrogen Vapor Pressure in high pressure storage tank 5
Reach setting value；
Step K：Vacuum pump 9 is reused to vacuumize upper chamber 12, lower cavity 13 and its attached pipeline
To setting vacuum, vacuum pump 9 is then closed, branch road valve 15, upper chamber flow control valve 10 is kept, puts hydrogen return valve
Door 3 and emptying valve 7 are closed, and are opened high pressure storage tank outlet valve 16 and lower cavity flow control valve 14, are made in high pressure storage tank 5
Hydrogen entered with specific speed in lower cavity 13, until after pressure reaches setting value in lower cavity 13, close lower part
Cavity flow control valve 14, makes Hydrogen Vapor Pressure in lower cavity 13 be kept constant during whole experiment；
Step L：Branch road valve 15 and upper chamber flow control valve 10 are opened, makes the hydrogen in high pressure storage tank 5 with spy
Fixed speed enter upper chamber 12 in, until pressure reach setting upper pressure limit after, close branch road valve 15, opening put hydrogen return
Road valve 3, makes the hydrogen discharge in upper chamber 12 into low pressure storage tank 2, when the pressure in upper chamber 12 reaches experiment pressure
After power lower limit, hydrogen circuit valve 3 is put in closing, is then again turned on branch road valve 15 and upper chamber 12 is flushed with hydrogen, weigh repeatedly
It is multiple it is above-mentioned to being flushed with hydrogen of upper chamber 12, put hydrogen process, until disk sample 23 destroys；
Step M：The fatigue life cycle of experience before recording disc sample 23 destroys, argon gas pair is used by replacement piping 18
Hydrogen in respective line is carried out after replacing several times, separates upper chamber 12 and lower cavity 13, takes out disk sample 23.
In above-mentioned test method, the result for becoming hydrogen pressure fatigue test and constant hydrogen pressure fatigue test has a larger difference, and two
Kind of experiment, which has, corresponding applies operating mode.The burst pressure of disk sample 23 and compared with fatigue life when high pressure hydrogen contacts
It can decrease in the case of other, this is because hydrogen is to caused by the damage of material.Based on above-mentioned experimental rig and test side
Method, can obtain burst pressure and the fatigue life of hydrogen gas environment lower disc sample 23, and above-mentioned data can be used to evaluate material
The compatibility of material and high pressure hydrogen environment.
In the present invention, apply the method for load to it using the pressure difference of 23 upper and lower surface of disk sample, avoid multiple
Miscellaneous servo test mechanism, weight of equipment, volume greatly reduce, and cost reduction is easy to operate, and test efficiency improves, experiment
Middle hydrogen consumption is few；Avoided in device using high pressure dynamic sealing element, the probability that hydrogen leaks can be reduced, improve dress
The reliability and security put；During experiment, the parameter such as strain and displacement of disk sample 23 can be measured easily, phase
Answer influence of the testing element from high pressure hydrogen.Such as the traditional material and hydrogen compatibility that are proposed in patent [201110259252.2]
Experimental rig, only servo control mechanism just weigh several tons plus supporting oil supply system, and equipment is total usually more than 4 meters high, high pressure hydrogen
Environmental cabinet generally also reaches several tons of weights, and equipment investment reaches millions of members, and operation needs more than 2 people every time, every time beam worker before experiment
When making small more than 5, its hydrogen gas environment case internal volume is usually more than 10L, and experiment hydrogen-consuming volume is big, easily occurs at equipment dynamic sealing
Hydrogen gas leakage, and the testing element signal such as strain is easily influenced by high pressure hydrogen.Contrastingly, multi-functional pressure differential High Pressure Hydrogen with
For compatibility tests device without complicated auxiliary facility, main member tests a diameter of 150~200mm of cavity, height
For 200~250mm, about 50 kilograms of test cavity weight, cost can be greatly reduced, and device is easy to operate；Test the content of cavity
Product is about 50mL, and experiment consuming amounts of hydrogen is small, and the parameter requirements of corresponding air supply system can also reduce；All sealings in device
Element is all static seal O-ring 22, is not susceptible to hydrogen gas leakage, displacement tester 27 and strain detection testing device 28 in device
Isolate with high pressure hydrogen, signal stabilization.
Finally it should be noted that listed above is only specific embodiment of the invention.Obviously, the present invention with compared with
Good case study on implementation discloses as above, but is not limited to the present invention, any person skilled in the art, is not departing from this
In the range of inventive technique scheme, become when structure and technology contents using the disclosure above make some changes or modification etc.
With the equivalence enforcement case of change.Such as the gas of the invention not limited in test cavity body is equally applicable to as high pressure hydrogen
Compatibility tests under the gaseous environments such as high pressure of hydrogen sulfide gas, high pressure hydrogen and natural gas gaseous mixture.It is every without departing from
The content of technical solution of the present invention, any simple modification made according to technical spirit of the invention to above case study on implementation, etc.
With change and modification, still fall within the range of technical solution of the present invention.
Claims (6)
1. the explosion bulge test test method of multi-functional pressure differential High Pressure Hydrogen and material compatibility, it is characterised in that based on multi-functional
The experimental rig of pressure difference type high pressure hydrogen and material compatibility, Mechanics Performance Testing is carried out under high pressure hydrogen environment to disk sample,
The explosion bulge test test method specifically includes following step：
Step A：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement top
Cavity and lower cavity, remove end cap, to disk sample arrangement displacement tester and are answered using the center cavity of upper chamber
Become test device；
Step B：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches setting in system
After value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches setting in high pressure storage tank
Value；
Step C：Reuse vacuum pump to carry out after being evacuated to setting vacuum lower cavity and its attached pipeline, close
Vacuum pump, makes the hydrogen in high pressure storage tank enter with specific speed in lower cavity by lower cavity flow control valve,
Until disk sample explosion, cuts off hydrogen source, burst pressure, and the strain of recording disc sample and position during experiment are recorded
Move；
Step D：The hydrogen in experiment cavity and pipeline is carried out after replacing at least once using argon gas, separation upper chamber is with
Portion's cavity, takes out disk sample；
The experimental rig of the multi-functional pressure differential High Pressure Hydrogen and material compatibility includes experiment cavity, Pneumatic booster pump, low pressure
Storage tank, high pressure storage tank, vacuum pump, hydrogen cylinder group, argon bottle group and control system module；
The experiment cavity includes end cap, upper chamber, lower cavity, pressure ring, and upper chamber, the inside center of lower cavity are empty
Chamber forms the cavity passage of connection, between end cap and upper chamber, passes through end cap spiral shell between upper chamber and lower cavity respectively
Bolt, upper chamber are bolted, and junction is all sealed using O-ring as sealing element, can be realized after being capped end cap
The sealing of cavity passage；Lower cavity is on the contact surface with upper chamber, i.e., on the upper surface of lower cavity, equipped with for putting
The groove of disk sample is put, and O-ring is provided between disk sample and the groove of lower cavity and is used to seal；The pressure ring embeds
It is interference fitted in upper chamber, and with upper chamber, pressure ring is used to apply to the disk sample being placed in lower cavity groove
Pressurize stress, and O-ring is all respectively arranged between pressure ring and upper chamber, between pressure ring and disk sample and is used to seal；Pressure ring
Using annular compression ring, the overall diameter of pressure ring is identical with the diameter of disk sample, the interior diameter of pressure ring and the interior diameter of upper chamber,
The interior diameter of lower cavity is identical；Upper chamber is led to being respectively arranged with upper chamber blow vent and lower cavity in lower cavity
Gas port；The upper chamber blow vent, lower cavity blow vent are additionally provided with blowdown piping, and are used to control equipped with emptying valve；
Branch is additionally provided between the upper chamber blow vent, lower cavity blow vent to be used to connect, and branch is provided with branch
Road valve；It is equipped with i.e. between upper chamber blow vent, lower cavity blow vent by upper chamber flow control valve, bypass valve
Door, the connecting pipeline of lower cavity flow control valve；
The hydrogen cylinder group is used to carry the hydrogen that is for experiment, and the argon bottle group is used for the argon gas for providing displacement and experiment, hydrogen
Exhaust outlet, the exhaust outlet of argon bottle group of gas cylinders group are respectively connected to the air inlet of low pressure storage tank, and the outlet of low pressure storage tank connects
Be connected to Pneumatic booster pump, Pneumatic booster pump is connected to high pressure storage tank, the exhaust outlet of high pressure storage tank respectively with upper chamber blow vent
Connected with lower cavity blow vent；Upper chamber blow vent and lower cavity blow vent be equipped be directly connected to low pressure storage tank put hydrogen
Circuit, for the hydrogen given off in upper chamber or lower cavity to be recycled to low pressure storage tank；Upper chamber blow vent is with
Portion's cavity blow vent is equipped with the replacement piping for being directly connected to argon bottle group, is put for carrying out gas to upper chamber or lower cavity
Change；Upper chamber blow vent, lower cavity blow vent are also connected with the air inlet of vacuum pump；
Branch is additionally provided between the exhaust outlet of the hydrogen cylinder group, the exhaust outlet of argon bottle group to be used to connect, and is set on branch
There is valve E；I.e. the exhaust outlet of hydrogen cylinder group, argon bottle group exhaust outlet between be equipped with by valve A, valve E, the company of valve B
Siphunculus road, and ensure that the connecting pipeline between the air inlet of the exhaust outlet of hydrogen cylinder group, low pressure storage tank passes through valve A, valve C,
Connecting pipeline between the exhaust outlet of argon bottle group, the air inlet of low pressure storage tank is by valve B, valve E, valve C；
The hydrogen circuit of putting is equipped with upper chamber flow control valve equipped with hydrogen circuit valve is put at upper chamber blow vent,
Lower cavity flow control valve is equipped with lower cavity blow vent, vavuum pump valve, high pressure are equipped with the air inlet of vacuum pump
The exhaust ports of storage tank are equipped with high pressure storage tank outlet valve；It is the exhaust ports of the hydrogen cylinder group, the exhaust ports of argon bottle group, low
Press at the air inlet of storage tank, valve A, valve B, valve C, valve D are respectively equipped with replacement piping；
The control system module is used to control the operation of Pneumatic booster pump and vacuum pump, the valvular aperture of institute.
2. the change hydrogen of multi-functional pressure differential High Pressure Hydrogen and material compatibility presses fatigue test test method, it is characterised in that is based on
The experimental rig of multi-functional pressure differential High Pressure Hydrogen and material compatibility, mechanical property is carried out under high pressure hydrogen environment to disk sample
Test, the change hydrogen pressure fatigue test test method specifically include following step：
Step E：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement top
Cavity and lower cavity, remove end cap, to disk sample arrangement displacement tester and are answered using the center cavity of upper chamber
Become test device；
Step F：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches setting in system
After value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches setting in high pressure storage tank
Value；
Step G：Reuse vacuum pump to carry out after being evacuated to setting vacuum lower cavity and its attached pipeline, close
Vacuum pump, makes the hydrogen in high pressure storage tank enter with specific speed in lower cavity by lower cavity flow control valve,
Until after pressure reaches the test pressure upper limit, stop being flushed with hydrogen, then by the hydrogen discharge in lower cavity to low pressure storage tank, instantly
After portion's cavity internal pressure reaches test pressure lower limit, hydrogen is put in stopping, then being continuously repeated and above-mentioned be flushed with hydrogen, put hydrogen process, Zhi Daoyuan
Disk sample destroys；
Step H：The fatigue life cycle of experience before recording disc sample destroys, using argon gas to the hydrogen in experiment cavity and pipeline
Gas is carried out after replacing at least once, separates upper chamber and lower cavity, takes out disk sample；
The experimental rig of the multi-functional pressure differential High Pressure Hydrogen and material compatibility includes experiment cavity, Pneumatic booster pump, low pressure
Storage tank, high pressure storage tank, vacuum pump, hydrogen cylinder group, argon bottle group and control system module；
The experiment cavity includes end cap, upper chamber, lower cavity, pressure ring, and upper chamber, the inside center of lower cavity are empty
Chamber forms the cavity passage of connection, between end cap and upper chamber, passes through end cap spiral shell between upper chamber and lower cavity respectively
Bolt, upper chamber are bolted, and junction is all sealed using O-ring as sealing element, can be realized after being capped end cap
The sealing of cavity passage；Lower cavity is on the contact surface with upper chamber, i.e., on the upper surface of lower cavity, equipped with for putting
The groove of disk sample is put, and O-ring is provided between disk sample and the groove of lower cavity and is used to seal；The pressure ring embeds
It is interference fitted in upper chamber, and with upper chamber, pressure ring is used to apply to the disk sample being placed in lower cavity groove
Pressurize stress, and O-ring is all respectively arranged between pressure ring and upper chamber, between pressure ring and disk sample and is used to seal；Pressure ring
Using annular compression ring, the overall diameter of pressure ring is identical with the diameter of disk sample, the interior diameter of pressure ring and the interior diameter of upper chamber,
The interior diameter of lower cavity is identical；Upper chamber is led to being respectively arranged with upper chamber blow vent and lower cavity in lower cavity
Gas port；The upper chamber blow vent, lower cavity blow vent are additionally provided with blowdown piping, and are used to control equipped with emptying valve；
Branch is additionally provided between the upper chamber blow vent, lower cavity blow vent to be used to connect, and branch is provided with branch
Road valve；It is equipped with i.e. between upper chamber blow vent, lower cavity blow vent by upper chamber flow control valve, bypass valve
Door, the connecting pipeline of lower cavity flow control valve；
The hydrogen cylinder group is used to carry the hydrogen that is for experiment, and the argon bottle group is used for the argon gas for providing displacement and experiment, hydrogen
Exhaust outlet, the exhaust outlet of argon bottle group of gas cylinders group are respectively connected to the air inlet of low pressure storage tank, and the outlet of low pressure storage tank connects
Be connected to Pneumatic booster pump, Pneumatic booster pump is connected to high pressure storage tank, the exhaust outlet of high pressure storage tank respectively with upper chamber blow vent
Connected with lower cavity blow vent；Upper chamber blow vent and lower cavity blow vent be equipped be directly connected to low pressure storage tank put hydrogen
Circuit, for the hydrogen given off in upper chamber or lower cavity to be recycled to low pressure storage tank；Upper chamber blow vent is with
Portion's cavity blow vent is equipped with the replacement piping for being directly connected to argon bottle group, is put for carrying out gas to upper chamber or lower cavity
Change；Upper chamber blow vent, lower cavity blow vent are also connected with the air inlet of vacuum pump；
Branch is additionally provided between the exhaust outlet of the hydrogen cylinder group, the exhaust outlet of argon bottle group to be used to connect, and is set on branch
There is valve E；I.e. the exhaust outlet of hydrogen cylinder group, argon bottle group exhaust outlet between be equipped with by valve A, valve E, the company of valve B
Siphunculus road, and ensure that the connecting pipeline between the air inlet of the exhaust outlet of hydrogen cylinder group, low pressure storage tank passes through valve A, valve C,
Connecting pipeline between the exhaust outlet of argon bottle group, the air inlet of low pressure storage tank is by valve B, valve E, valve C；
The hydrogen circuit of putting is equipped with upper chamber flow control valve equipped with hydrogen circuit valve is put at upper chamber blow vent,
Lower cavity flow control valve is equipped with lower cavity blow vent, vavuum pump valve, high pressure are equipped with the air inlet of vacuum pump
The exhaust ports of storage tank are equipped with high pressure storage tank outlet valve；It is the exhaust ports of the hydrogen cylinder group, the exhaust ports of argon bottle group, low
Press at the air inlet of storage tank, valve A, valve B, valve C, valve D are respectively equipped with replacement piping；
The control system module is used to control the operation of Pneumatic booster pump and vacuum pump, the valvular aperture of institute.
3. the constant hydrogen of multi-functional pressure differential High Pressure Hydrogen and material compatibility presses fatigue test test method, it is characterised in that base
In the experimental rig of multi-functional pressure differential High Pressure Hydrogen and material compatibility, mechanical property is carried out to disk sample under high pressure hydrogen environment
It can test, the constant hydrogen pressure fatigue test test method specifically includes following step：
Step I：Upper chamber and lower cavity are separated, after having installed disk sample, with upper chamber bolt tight engagement top
Cavity and lower cavity, the ionic liquid that depth is 5~10mm are filled on disk sample top, then with bolt of cover tight engagement
End cap and upper chamber；
Step J：The residual air in experimental rig and subsidiary pipeline is taken out with vacuum pump, until vacuum reaches setting in system
After value, high pressure hydrogen is carried out to high pressure storage tank using Pneumatic booster pump and is filled, until Hydrogen Vapor Pressure reaches setting in high pressure storage tank
Value；
Step K：Reuse vacuum pump upper chamber, lower cavity and its attached pipeline are carried out being evacuated to setting vacuum
Degree, is then closed vacuum pump, the hydrogen in high pressure storage tank is entered with specific speed by lower cavity flow control valve
In lower cavity, until after pressure reaches setting value, stop being flushed with hydrogen, close lower cavity flow control valve, make lower cavity
Interior Hydrogen Vapor Pressure is kept constant during whole experiment；
Step L：The hydrogen in high pressure storage tank is set to enter upper chamber with specific speed by upper chamber flow control valve
It is interior, until after pressure reaches setting upper pressure limit, stop being flushed with hydrogen, then by the hydrogen discharge in upper chamber to low pressure storage tank,
When in upper chamber pressure reach setting low pressure limit after, stopping put hydrogen, then continuously repeat it is above-mentioned be flushed with hydrogen, put hydrogen process, directly
Destroyed to disk sample；
Step M：The fatigue life cycle of experience before recording disc sample destroys, using argon gas to the hydrogen in experiment cavity and pipeline
Gas is carried out after replacing at least once, separates upper chamber and lower cavity, takes out disk sample；
The experimental rig of the multi-functional pressure differential High Pressure Hydrogen and material compatibility includes experiment cavity, Pneumatic booster pump, low pressure
Storage tank, high pressure storage tank, vacuum pump, hydrogen cylinder group, argon bottle group and control system module；
The experiment cavity includes end cap, upper chamber, lower cavity, pressure ring, and upper chamber, the inside center of lower cavity are empty
Chamber forms the cavity passage of connection, between end cap and upper chamber, passes through end cap spiral shell between upper chamber and lower cavity respectively
Bolt, upper chamber are bolted, and junction is all sealed using O-ring as sealing element, can be realized after being capped end cap
The sealing of cavity passage；Lower cavity is on the contact surface with upper chamber, i.e., on the upper surface of lower cavity, equipped with for putting
The groove of disk sample is put, and O-ring is provided between disk sample and the groove of lower cavity and is used to seal；The pressure ring embeds
It is interference fitted in upper chamber, and with upper chamber, pressure ring is used to apply to the disk sample being placed in lower cavity groove
Pressurize stress, and O-ring is all respectively arranged between pressure ring and upper chamber, between pressure ring and disk sample and is used to seal；Pressure ring
Using annular compression ring, the overall diameter of pressure ring is identical with the diameter of disk sample, the interior diameter of pressure ring and the interior diameter of upper chamber,
The interior diameter of lower cavity is identical；Upper chamber is led to being respectively arranged with upper chamber blow vent and lower cavity in lower cavity
Gas port；The upper chamber blow vent, lower cavity blow vent are additionally provided with blowdown piping, and are used to control equipped with emptying valve；
Branch is additionally provided between the upper chamber blow vent, lower cavity blow vent to be used to connect, and branch is provided with branch
Road valve；It is equipped with i.e. between upper chamber blow vent, lower cavity blow vent by upper chamber flow control valve, bypass valve
Door, the connecting pipeline of lower cavity flow control valve；
The hydrogen cylinder group is used to carry the hydrogen that is for experiment, and the argon bottle group is used for the argon gas for providing displacement and experiment, hydrogen
Exhaust outlet, the exhaust outlet of argon bottle group of gas cylinders group are respectively connected to the air inlet of low pressure storage tank, and the outlet of low pressure storage tank connects
Be connected to Pneumatic booster pump, Pneumatic booster pump is connected to high pressure storage tank, the exhaust outlet of high pressure storage tank respectively with upper chamber blow vent
Connected with lower cavity blow vent；Upper chamber blow vent and lower cavity blow vent be equipped be directly connected to low pressure storage tank put hydrogen
Circuit, for the hydrogen given off in upper chamber or lower cavity to be recycled to low pressure storage tank；Upper chamber blow vent is with
Portion's cavity blow vent is equipped with the replacement piping for being directly connected to argon bottle group, is put for carrying out gas to upper chamber or lower cavity
Change；Upper chamber blow vent, lower cavity blow vent are also connected with the air inlet of vacuum pump；
Branch is additionally provided between the exhaust outlet of the hydrogen cylinder group, the exhaust outlet of argon bottle group to be used to connect, and is set on branch
There is valve E；I.e. the exhaust outlet of hydrogen cylinder group, argon bottle group exhaust outlet between be equipped with by valve A, valve E, the company of valve B
Siphunculus road, and ensure that the connecting pipeline between the air inlet of the exhaust outlet of hydrogen cylinder group, low pressure storage tank passes through valve A, valve C,
Connecting pipeline between the exhaust outlet of argon bottle group, the air inlet of low pressure storage tank is by valve B, valve E, valve C；
The hydrogen circuit of putting is equipped with upper chamber flow control valve equipped with hydrogen circuit valve is put at upper chamber blow vent,
Lower cavity flow control valve is equipped with lower cavity blow vent, vavuum pump valve, high pressure are equipped with the air inlet of vacuum pump
The exhaust ports of storage tank are equipped with high pressure storage tank outlet valve；It is the exhaust ports of the hydrogen cylinder group, the exhaust ports of argon bottle group, low
Press at the air inlet of storage tank, valve A, valve B, valve C, valve D are respectively equipped with replacement piping；
The control system module is used to control the operation of Pneumatic booster pump and vacuum pump, the valvular aperture of institute.
4. according to the test method described in claims 1 to 3 any one, it is characterised in that the thickness of the disk sample is
0.5~2mm, disk sample use plane disk sample or straw hat shape disk sample, and straw hat shape disk sample refers to centre
Raised, the disk sample of edge plane, and ensure that the diameter of intermediate projections structure is not more than multi-functional pressure differential High Pressure Hydrogen and material
Expect the interior diameter of pressure ring in the experimental rig of compatibility.
5. test method according to claim 1 or 2, it is characterised in that the displacement tester uses linear variable
Differential transformer type displacement sensor.
6. test method according to claim 1 or 2, it is characterised in that the strain detection testing device should using resistance-type
Become piece.
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| CN109297804B (en) * | 2018-10-30 | 2021-01-05 | 浙江大学 | Liquid hydrogen temperature area material mechanics test platform based on low-temperature refrigerator and refrigerant circulation |
| CN110095359B (en) * | 2019-04-16 | 2020-05-15 | 浙江大学 | Material fatigue damage test method under high-pressure hydrogen-doped natural gas environment |
| CN110095340B (en) * | 2019-04-16 | 2020-05-15 | 浙江大学 | Single-loading damage test method for material in high-pressure hydrogen-doped natural gas environment |
| CN111881546B (en) * | 2020-06-12 | 2023-11-10 | 合肥通用机械研究院有限公司 | Pressure-bearing equipment test pressure calculation method based on differential pressure type fatigue test system |
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| CN103278390B (en) * | 2013-05-28 | 2015-02-25 | 浙江大学 | Material testing device under high-pressure hydrogen environment based on ionic liquids and operation method |
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