CN103278390B - Material testing device under high-pressure hydrogen environment based on ionic liquids and operation method - Google Patents
Material testing device under high-pressure hydrogen environment based on ionic liquids and operation method Download PDFInfo
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- CN103278390B CN103278390B CN201310205774.3A CN201310205774A CN103278390B CN 103278390 B CN103278390 B CN 103278390B CN 201310205774 A CN201310205774 A CN 201310205774A CN 103278390 B CN103278390 B CN 103278390B
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 157
- 239000001257 hydrogen Substances 0.000 title claims abstract description 112
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 112
- 239000002608 ionic liquid Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004154 testing of material Methods 0.000 title abstract description 3
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 18
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 14
- 230000007613 environmental effect Effects 0.000 claims description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 20
- 229910052786 argon Inorganic materials 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000006424 Flood reaction Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to a testing technique of mechanical properties of materials, in order to provide a material testing device under a high-pressure-hydrogen environment based on ionic liquids and an operation method. A high-pressure hydrogen environment box of the device is internally provided with a cylindrical sample support; the lower end of a loading rod is connected with a power output device of a host machine, and the upper end of the loading rod penetrates through an end cover, and extends into the sample support to be connected with a sample fixture; the ionic liquids are filled in an internal space below an open pore in the top of the sample support; a balance cavity is arranged at the bottom of the end cover, and is composed of an extending section of the tail end of the end cover, a piston connected with the loading rod and a seal bottom cover of the balance cavity; and the loading rod is provided with a load sensor. According to the invention, the balancing cavity and the high-pressure hydrogen environment box transfer pressure by utilizing the ionic liquids, and the hydrogen leakage hazard generated when the pressure is transferred by using hydrogen is prevented; and high-pressure dynamic seal elements, rather than high-pressure hydrogen, in the device, are all in contact with the ionic liquids, thus hydrogen leakage is prevented, and the device safety is improved.
Description
Technical field
The invention belongs to material mechanical performance testing apparatus development field, particularly a kind of based on material test apparatus and method of operating under the high pressure hydrogen environment of ionic liquid.
Background technology
Along with becoming increasingly conspicuous and the continuous aggravation of environmental pollution of energy crisis, the exploration paces to new forms of energy have all been stepped up in countries in the world.Hydrogen Energy with its various, clean environmental protection in source, can store and the advantage such as renewable, can meet the requirement of resource, environment and sustainable development, be extremely potential secondary energy in future simultaneously.In the applicable process of hydrogen, hydrogen carries out storing and transporting mainly with high voltage style.In order to meet the demand of vehicle continual mileage, the pressure of high-pressure hydrogen storing reached 70 MPa and more than.But, for the material directly contacted with high pressure hydrogen for a long time, its performance there will be deterioration in various degree, as toughness reduction, crack growth rate quickening, degradation under fatigue lifetime, equipment catastrophic failure within cycle designed life can be caused time serious, jeopardize the person and property safety.
In order to evaluate the permanance of different materials under high pressure hydrogen environment, obtain the mechanical performance data that can be used for accordingly instructing storage hydrogen, the design of defeated hydrogen production device, effective method on existing conventional material testing machine for mechanical properties main frame, docks hydrogen gas environment case test.But countries in the world are all faced with following technical barrier at present in the performance history of this kind equipment:
(1) hydrogen gas environment case fills hydrogen slowly, tests length consuming time.Because hydrogen is inflammable, explosive, pneumatic hydrogen pressurization pump is usually adopted to fill hydrogen gas environment case.But this type of supercharge pump is along with the lifting of specified maximum top hole pressure, and corresponding flow reduces gradually, hydrogen gas environment case is pressurized to test pressure (100 ~ 200 MPa), generally want a few hours, test efficiency is lower.
(2) real load be applied on sample cannot be measured comparatively accurately.At present, the load transducer for measuring load has two kinds of method for arranging: one is placed in hydrogen gas environment case inside, namely built-in; Another kind is mounted in environmental cabinet outside, is called external.The sensitive element of built-in load transducer can affect by high pressure hydrogen, and in use for some time, the performances such as its resistance will change, and cause measurement result distortion.The numerical value that external load transducer is measured contains the impact of high pressure dynamic sealing place (load bar and O type circle seal between) friction force, and this friction force changed along with the time, cannot numerically it is simply rejected.
(3) high pressure dynamic sealing cannot guarantee hydrogen No leakage, causes potential safety hazard.Hydrogen is the gas very easily occurring to leak, and inflammable, explosive.The design pressure of hydrogen gas environment case is generally 100 ~ 200 MPa.In existing test unit, high pressure hydrogen directly seals with O type circle and contacts.When carrying out fatigue of materials performance test, there is relative to-and-fro movement between will constantly sealing with O type circle in load bar, seals the high pressure hydrogen directly contacted and easily leak, there is larger potential safety hazard with O type circle.
(4) in hydrogen gas environment case, hydrogen can to the acting force of load bar generation up to several tons, and when sample fracture, this part acting force produces enormous impact to test unit main frame, reduces its control accuracy and life-span.
The impact that a kind of method proposing Load Sensitive element that is sticked in hollow type load bar inside in patent [201110259252.2] is measured to overcome kinetic force of friction and high pressure hydrogen real load on sample.But because load bar deflection in process of the test is very little, this just causes Load Sensitive element measurement sensistivity lower; And this paster mode need complete at the scene, versatility is relative with precision poor.The testing machine that proposes in patent [201110259252.2] exists and fills slow, the consuming time length of hydrogen, and seals with O type circle the problem that the high pressure hydrogen directly contacted easily occurs to leak.
For solving above-mentioned technical barrier, can introduce a kind of liquid of satisfied test basic demand in existing test unit, the compressibility coefficient utilizing liquid lower realizes Quick-pressing to hydrogen in hydrogen gas environment case, raises the efficiency; The contact of built-in load transducer and the sealing of O type circle and high pressure hydrogen can be isolated in addition by liquid, prevent load transducer to be subject to the impact of high pressure hydrogen, and the leakage of O type circle sealing place hydrogen can be avoided to a certain extent.
Ionic liquid refers in room temperature or close to presenting salt that is liquid, that be made up of zwitterion completely under room temperature, also referred to as low temperature molten salt.Ionic liquid is tasteless, do not fire, and its vapour pressure is extremely low, volatilizees hardly under normality, therefore can be used for high vacuum system or does not allow in the occasion of volatilization.Hydrogen purity General Requirements under high pressure hydrogen environment in material test apparatus in environmental cabinet reaches 99.999% and above level.Therefore, if want to add liquid medium to overcome the technical deficiency in existing environmental cabinet in hydrogen gas environment case, ionic liquid is desirable selection.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes current deficiency of the prior art, proposes a kind of based on material test apparatus and method of operating under the high pressure hydrogen environment of ionic liquid.
For technical solution problem, solution of the present invention is:
There is provided a kind of based on material test apparatus under the high pressure hydrogen environment of ionic liquid, comprising main frame, the design pressure with PTO is the hydrogen gas environment case of 100 ~ 200 MPa, pneumatic hydrogen pressurization pump, vacuum pump, hydrogen cylinder group and control system; Hydrogen gas environment case is made up of the environmental cabinet casing of tight engagement and bottom head covers, and columnar sample mount is established in its inside; Be connected with end cap bottom sample mount, its top is provided with the perforate for clamping sample, and the specimen holder and this perforate that are positioned at sample mount inside are oppositely arranged; The lower end of load bar connects the PTO of main frame, and its upper end is run through end cap and stretched in sample mount and is connected with specimen holder; Ionic liquid is loaded with in inner space below sample mount top drilling; The bottom of end cap is provided with counter balance pocket, seals bottom form by end cap end extension, the piston connecting load bar and counter balance pocket; Splendid attire ionic liquid in counter balance pocket and ionic liquid interface established by chamber wall, the vertical direction at load bar center establishes ionic liquid passage, and its one end open is in counter balance pocket, and the other end is opened in sample mount; Load bar establishes load transducer, and the inner member of load transducer is covered by insulating coating, and described ionic liquid floods load transducer and the O type circle seal element between load bar and end cap; End cap is established and draws lead channels and gas interface, gas interface one end is connected with the gas passage stretching into sample mount, and the other end is connected with pneumatic hydrogen pressurization pump and vacuum pump by pipeline.
In the present invention, the sectional area stretching into the load bar corresponding part in sample mount is identical with the active area of ionic liquid in counter balance pocket to piston.
In the present invention, in described sample mount, ionic liquid surface arranges the floating disk of polythene material, and floating between disk and load bar and sample mount is clearance fit.
In the present invention, end cap is provided with the atmosphere communicating passage leaked for observing monitoring ionic liquid, and atmosphere communicating passage is connected to the cavity of the piston opposite side relative with counter balance pocket.
In the present invention, also comprise the gentle dynamic liquid booster pump of ionic liquid storage device, be connected to ionic liquid interface by pipeline successively.
In the present invention, also comprise the argon bottle group being connected to gas interface by pipeline.
In the present invention, described sample mount is cylindrical shape, and the perforate at its top has two, in flute profile.
In the present invention, described environmental cabinet casing and end cap, by bolted joints, are threaded connection with end cap bottom sample mount.
In the present invention, also have the guide upright post that two vertical, upper guiding ring flat-plate and environmental cabinet back up pad provide on guide upright post, and the upper and lower of hydrogen gas environment case connects with upper guiding ring flat-plate and environmental cabinet back up pad respectively; Upper guiding ring flat-plate is established environmental cabinet casing lifting hydraulic cylinder.
Invention further provides the method for operating based on material under the high pressure hydrogen environment of ionic liquid utilizing aforementioned means, comprise the following steps:
(1) hydrogen gas environment box body and end cap is separated, by specimen clamping between sample mount top drilling and specimen holder; After setting ionic liquid liquid level, then use bolt tight engagement casing and end cap;
(2) take out air in hydrogen gas environment case with vacuum pump, then carry out several times displacement with argon gas, then carry out several times displacement with hydrogen, until hydrogen purity reaches requirement in hydrogen gas environment case; Then, with pneumatic hydrogen pressurization pump, hydrogen is carried out to hydrogen gas environment case and fill, until pressure reaches the transitional pressure of setting;
(3) utilize Pneumatic liquid supercharge pump to fill ionic liquid in hydrogen gas environment case, the continuous compression hydrogen of ionic liquid, Hydrogen Vapor Pressure and ionic liquid pressure rise until reach test pressure gradually, stop pressurization;
(4) test is started, record data; After off-test, the high pressure hydrogen of first releasing in hydrogen gas environment case; Then, with vacuum pump, remaining hydrogen in hydrogen gas environment case is found time, then carry out several times displacement with argon gas; Be separated hydrogen gas environment box body and end cap, take out sample.
Relative to prior art, beneficial effect of the present invention is:
Pneumatic hydrogen pressurization pump and ionic liquid is adopted to pressurize the supercharging mode combined, reduce the requirement to the specified maximum top hole pressure of pneumatic hydrogen pressurization pump, the corresponding lifting of its corresponding flow, pneumatic hydrogen pressurization pump pressure process is obviously accelerated, and it is consuming time very short based on the ionic liquid pressure period of Pneumatic liquid supercharge pump, therefore, whole hydrogen gas environment case can significantly shorten pressing time; Load transducer is flooded by ionic liquid, has isolated the contact of high pressure hydrogen and load transducer, has avoided it to affect by high pressure hydrogen; Utilize ionic liquid to realize pressure transmission between counter balance pocket and hydrogen gas environment case, avoid the hydrogen gas leakage hidden danger used existing for hydrogen transmission of pressure; In device, all high pressure dynamic sealing elements all contact but not high pressure hydrogen with ionic liquid, avoid hydrogen gas leakage to a certain extent, improve equipment safety; Selected ionic liquid has the color of easy identification, if high pressure dynamic sealing place leaks, can find very soon leak and tentatively determine leak position.
Accompanying drawing explanation
Fig. 1 is general arrangement schematic diagram of the present invention;
Fig. 2 is hydrogen gas environment case and cut-away view thereof;
Fig. 3 is the grooved perforate being located at sample mount top.
Reference numeral in figure is: guide upright post 1, environmental cabinet casing lifting hydraulic cylinder 2, upper guiding ring flat-plate 3, hydrogen gas environment case 4, environmental cabinet back up pad 5, hydrogen cylinder group 6, argon bottle group 7, pneumatic hydrogen pressurization pump 8, main frame 9, ionic liquid storage device 10, Pneumatic liquid supercharge pump 11, control system 12, vacuum pump 13, environmental cabinet casing 14, cylindrical shape sample mount 15, specimen holder 16, load bar 17, gas passage 18, ionic liquid passage 19, end cap 20, gas interface 21, piston 22, ionic liquid interface 23, counter balance pocket sealing bottom 24, counter balance pocket 25, atmosphere communicating passage 26, O type circle sealing 27, draw lead channels 28, load transducer 29, ionic liquid 30, float disk 31, sample 32, slot-like opening 33.
Embodiment
In the present embodiment based on material test apparatus under the high pressure hydrogen environment of ionic liquid, as shown in Figure 1, comprise hydrogen gas environment case 4, there is the main frame 9 of Power output, the hydrogen cylinder group 6 of high pressure hydrogen and pneumatic hydrogen pressurization pump 8 are provided, the ionic liquid storage device 10 of high-pressure ion liquid and Pneumatic liquid supercharge pump 11, the vacuum pump 13 for vacuumizing in hydrogen gas environment case 4, argon bottle group 7 for replacing are provided, and the control system 12 etc. of whole test unit.Hydrogen gas environment case 4 is by environmental cabinet back up pad 5 fixed support, and its opening and closing is realized jointly by environmental cabinet casing lifting hydraulic cylinder 2, upper guiding ring flat-plate 3 and guide upright post 1.
As shown in Figure 2, hydrogen gas environment case 4 is made up of environmental cabinet casing 14 and end cap 20, and the two realizes tight engagement by bolt.Load bar 17 lower end of transmitting axial load connects the PTO of main frame 9, and end cap 20 is run through in upper end, and gos deep into being connected with specimen holder 16 in environmental cabinet casing 14, for sample 32 provides axial force.Be threaded connection with end cap 20 bottom cylindrical shape sample mount 15, and two slot-like opening 33 are offered in two positions relative at its top, to facilitate the clamping of sample 32; In the space of, slot-like opening less than 33 inner in cylindrical shape sample mount 15, splendid attire ionic liquid 30, liquid floods the load transducer 29 that is connected with load bar 17 and the O type circle between load bar 17 and end cap 20 seals 27.Load transducer 29 inner member is covered by insulating coating.For the liquid fluctuation avoiding load bar 17 axially-movable to cause, ionic liquid 30 surface arranges the floating disk 31 of polythene material.Floating between disk 31 and load load bar 17 and cylindrical shape sample mount 15 is clearance fit.There is counter balance pocket 25 bottom end cap 20, seal bottom 24 by the piston 22 and counter balance pocket that connect load bar 17 and form; Ionic liquid is entered by ionic liquid interface 23 and is full of counter balance pocket 25, and enters in cylindrical shape sample mount 15 via the ionic liquid passage 19 at load bar 17 center, thus ensure that counter balance pocket 25 keeps identical with the pressure moment in hydrogen gas environment case 4.In addition, the sectional area stretching into load bar 17 corresponding part in hydrogen gas environment case 4 is identical with the active area of ionic liquid to piston 22 in counter balance pocket 25.Therefore, the thrust upwards that the downward thrust that the high-pressure fluid in hydrogen gas environment case 4 acts on load bar 17 and ionic liquid in counter balance pocket 25 produce load bar 17 is equal all the time, avoids the impact that when sample 32 ruptures, load bar 17 pairs of main frames 9 produce.End cap 20 is also provided with gas interface 21, draws lead channels 28, and be used for observing the atmosphere communicating passage 26 of monitoring ionic liquid and leaking.Wherein, gas interface 21 is connected with the gas passage 18 stretching into cylindrical shape sample mount 15.
The described method of operating based on material test apparatus under the high pressure hydrogen environment of ionic liquid, as illustrated in fig. 1 and 2, first environmental cabinet casing lifting hydraulic cylinder 2 is started, isolating environment box body 14 and end cap 20, slot-like opening 33 is made to be exposed to outside environmental cabinet casing 14 completely, clamping sample 32 after making the liquid level of ionic liquid 30 be in the position just in time flooding load transducer 29, with bolt tight engagement environmental cabinet casing 14 and end cap 20; The air of secondly finding time in hydrogen gas environment case 4 with vacuum pump 13, then argon bottle group 7 and pneumatic hydrogen pressurization pump 8 is communicated with, argon gas is utilized to carry out several times displacement to environmental cabinet casing 14, connect hydrogen cylinder group 6 and pneumatic hydrogen pressurization pump 8 again, low pressure hydrogen is utilized to carry out several times displacement to environmental cabinet casing 14, until the hydrogen purity in environmental cabinet casing 14 reaches testing requirements; Again, adopt and carry out high pressure hydrogen in pneumatic hydrogen pressurization pump 8 pairs of hydrogen gas environment casees 4 and fill, until pressure reaches the transitional pressure of setting in hydrogen gas environment case 4; Then, utilize Pneumatic liquid supercharge pump 11 to fill ionic liquid in hydrogen gas environment case 4, ionic liquid constantly compresses high pressure hydrogen, and hydrogen and ionic liquid pressure rise gradually, until its pressure reaches test pressure, stops pressurization; Finally, start test, record data.After off-test, the high pressure hydrogen of first releasing in hydrogen gas environment case 4; Then, with vacuum pump 13, the hydrogen in hydrogen gas environment case 4 is found time, then carry out several times displacement with argon gas; The separable environmental cabinet casing 14 of rearmost and end cap 20, take out sample 32.
As mentioned above, hydrogen gas environment case 4 adopts pneumatic hydrogen pressurization pump 8 and ionic liquid to pressurize the supercharging mode combined, relative to traditional pressuring method only adopting pneumatic hydrogen pressurization pump, this method reduce the requirement to the specified maximum top hole pressure of pneumatic hydrogen pressurization pump 8.For with a series of pneumatic hydrogen pressurization pump, specified maximum top hole pressure reduces, the corresponding lifting of its corresponding flow, thus pneumatic hydrogen pressurization pump pressure process is obviously accelerated, and consuming time very short based on the ionic liquid pressure period of Pneumatic liquid supercharge pump 11.Therefore, whole hydrogen gas environment case 4 can significantly shorten pressing time.Such as, be the hydrogen gas environment case 4 of 100 MPa for maximum working pressure (MOP), after supposing that pneumatic hydrogen pressurization pump 8 fills high pressure hydrogen to transition pressure P, the hydrogen volume in hydrogen gas environment case 4 is V.And after ionic liquid pressurization compression (pressure in hydrogen gas environment case 4 reaches 100 MPa), the volume of hydrogen be (2/3) V, namely the volume of the interior ionic liquid filled by Pneumatic liquid supercharge pump 11 of hydrogen gas environment case 4 is (1/3) V.Then test the hydrogen quality m filled in mesohigh hydrogen environment case 4 and equal 50.5 × (2/3) V, (hydrogen is 50.5 kg/m in 100 MPa, the state lower density of 15 DEG C
3).Can obtain as calculated, when the volume that above-mentioned quality is the hydrogen of m is V, corresponding density is 33.7kg/m
3, corresponding Hydrogen Vapor Pressure (i.e. transitional pressure P) is about 55 MPa.Therefore, the specified maximum top hole pressure of pneumatic hydrogen pressurization pump 8 is greater than 55 MPa, and relative to traditional pressuring method only adopting pneumatic hydrogen pressurization pump, the specified maximum top hole pressure of pneumatic hydrogen pressurization pump 8 is reduced to 55 MPa by 100 MPa.Thus, not only the average discharge of pneumatic hydrogen pressurization pump can larger lifting, and pneumatic hydrogen pressurization pump only needs by pressurized with hydrogen to 55 MPa, remaining voltage rise by rate of pressurization relatively very fast Pneumatic liquid supercharge pump 11 complete, whole hydrogen gas environment case 4 can significantly shorten pressing time.
As shown in Figure 2, load transducer 29 is flooded by ionic liquid 30, has isolated the contact of high pressure hydrogen and load transducer 29, avoids it to be subject to the impact of high pressure hydrogen; And load transducer 29 is positioned at the upside of load bar 17 first road O type circle sealing 27, avoids the impact of its measurement result by kinetic force of friction, ensure that the magnitude of load that load transducer 29 records is the real load be applied on sample 32.Utilize ionic liquid to realize pressure transmission between counter balance pocket 25 and hydrogen gas environment case 4, avoid the hydrogen gas leakage hidden danger used existing for hydrogen transmission of pressure; In device, all high pressure dynamic sealing elements (as O type circle sealing 27) all contact but not high pressure hydrogen with ionic liquid, avoid hydrogen gas leakage to a certain extent, improve equipment safety; Ionic liquid selected in package unit has the color of easy identification, if high pressure dynamic sealing place leaks, finds very soon leak and tentatively determine leak position by observing.
The above, it is only a case study on implementation of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with better case study on implementation, but and be not used to limit the present invention, any those skilled in the art, are not departing within the scope of technical solution of the present invention, make some change or amendment and become the equivalent case study on implementation of equivalent variations when the structure and technology contents that can utilize above-mentioned announcement.
Every content not departing from technical solution of the present invention, any simple modification done above case study on implementation according to technical spirit of the present invention, equivalent variations and modification, all still belong within the scope of technical solution of the present invention.
Claims (10)
1., based on a material test apparatus under the high pressure hydrogen environment of ionic liquid, comprising main frame, the design pressure with PTO is the hydrogen gas environment case of 100 ~ 200 MPa, pneumatic hydrogen pressurization pump, vacuum pump, hydrogen cylinder group and control system; It is characterized in that: hydrogen gas environment case is made up of the environmental cabinet casing of tight engagement and bottom head covers, and columnar sample mount is established in its inside; Be connected with end cap bottom sample mount, its top is provided with the perforate for clamping sample, and the specimen holder and this perforate that are positioned at sample mount inside are oppositely arranged; The lower end of load bar connects the PTO of main frame, and its upper end is run through end cap and stretched in sample mount and is connected with specimen holder; Ionic liquid is loaded with in inner space below sample mount top drilling; The bottom of end cap is provided with counter balance pocket, seals bottom form by end cap end extension, the piston connecting load bar and counter balance pocket; Splendid attire ionic liquid in counter balance pocket and ionic liquid interface established by chamber wall, the vertical direction at load bar center establishes ionic liquid passage, and its one end open is in counter balance pocket, and the other end is opened in sample mount; Load bar establishes load transducer, and the inner member of load transducer is covered by insulating coating, and described ionic liquid floods load transducer and the O type circle seal element between load bar and end cap; End cap is established and draws lead channels and gas interface, gas interface one end is connected with the gas passage stretching into sample mount, and the other end is connected with pneumatic hydrogen pressurization pump and vacuum pump by pipeline.
2. device according to claim 1, is characterized in that, the sectional area stretching into the load bar corresponding part in sample mount is identical with the active area of ionic liquid in counter balance pocket to piston.
3. device according to claim 1, is characterized in that, in described sample mount, ionic liquid surface arranges the floating disk of polythene material, and floating between disk and load bar and sample mount is clearance fit.
4. device as claimed in any of claims 1 to 3, is characterized in that, end cap is provided with the atmosphere communicating passage leaked for observing monitoring ionic liquid, and atmosphere communicating passage is connected to the cavity of the piston opposite side relative with counter balance pocket.
5. device as claimed in any of claims 1 to 3, is characterized in that, also comprises the gentle dynamic liquid booster pump of ionic liquid storage device, is connected to ionic liquid interface successively by pipeline.
6. device as claimed in any of claims 1 to 3, also comprises the argon bottle group being connected to gas interface by pipeline.
7. device as claimed in any of claims 1 to 3, the perforate at described sample mount top has two, in flute profile.
8. device as claimed in any of claims 1 to 3, described environmental cabinet casing and end cap, by bolted joints, are threaded connection with end cap bottom sample mount.
9. device as claimed in any of claims 1 to 3, also has the guide upright post that two vertical, upper guiding ring flat-plate and environmental cabinet back up pad provide on guide upright post, and the upper and lower of hydrogen gas environment case connects with upper guiding ring flat-plate and environmental cabinet back up pad respectively; Upper guiding ring flat-plate is established environmental cabinet casing lifting hydraulic cylinder.
10. described in claim 1 based on the method for operating of material test apparatus under the high pressure hydrogen environment of ionic liquid, it is characterized in that, comprise the following steps:
(1) hydrogen gas environment box body and end cap is separated, by specimen clamping on specimen holder; After setting ionic liquid liquid level, then use bolt tight engagement casing and end cap;
(2) take out air in hydrogen gas environment case with vacuum pump, then carry out several times displacement with argon gas, then carry out several times displacement with hydrogen, until hydrogen purity reaches requirement in hydrogen gas environment case; Then, with pneumatic hydrogen pressurization pump, hydrogen is carried out to hydrogen gas environment case and fill, until pressure reaches the transitional pressure of setting;
(3) utilize Pneumatic liquid supercharge pump to fill ionic liquid in hydrogen gas environment case, the continuous compression hydrogen of ionic liquid, Hydrogen Vapor Pressure and ionic liquid pressure rise until reach test pressure gradually, stop pressurization;
(4) test is started, record data; After off-test, the high pressure hydrogen of first releasing in hydrogen gas environment case; Then, with vacuum pump, remaining hydrogen in hydrogen gas environment case is found time, then carry out several times displacement with argon gas; Be separated hydrogen gas environment box body and end cap, take out sample.
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| US3975950A (en) * | 1975-03-17 | 1976-08-24 | Karoly Erdei | Apparatus for testing material strength |
| FR2933495B1 (en) * | 2008-07-07 | 2013-01-18 | Univ Lille Sciences Tech | TRIAXIAL CELL OF GEOMATERIALS UNDER PRESSURE AND SHEAR |
| CN102297807B (en) * | 2011-09-03 | 2013-04-03 | 浙江大学 | Tester for testing durability of material under high-pressure hydrogen environment |
| CN203275200U (en) * | 2013-05-28 | 2013-11-06 | 浙江大学 | Material testing device under high pressure hydrogen environment based on ionic liquid |
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