CN109612700B - Component performance test system under cryogenic high-pressure environment - Google Patents
Component performance test system under cryogenic high-pressure environment Download PDFInfo
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- CN109612700B CN109612700B CN201811513272.6A CN201811513272A CN109612700B CN 109612700 B CN109612700 B CN 109612700B CN 201811513272 A CN201811513272 A CN 201811513272A CN 109612700 B CN109612700 B CN 109612700B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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Abstract
The invention relates to a part performance test system under a cryogenic high-pressure environment, which comprises a vacuum protection cabin for placing parts to be tested, wherein the vacuum protection cabin is connected with a high-pressure gas supply system and a low-temperature fluid supply system; the high-pressure gas supply system comprises a low-pressure gas cylinder, a low-pressure stop valve, a booster pump, a high-pressure stop valve, a pressure regulating valve and a high-pressure stop valve which are connected in sequence, and the high-pressure stop valve is connected through a high-pressure gas supply pipeline; the low-temperature fluid supply system comprises a liquid Dewar, a low-temperature pressure regulating valve and a low-temperature high-pressure stop valve which are connected in sequence, and the low-temperature high-pressure stop valve is connected with the vacuum protection cabin through a low-temperature fluid supply pipeline. The invention can form a low-temperature and high-pressure composite environment, and the structure and material performance judgment under the extreme working condition is not easy to generate deviation.
Description
Technical Field
The invention relates to the technical field of low-temperature testing, in particular to a component performance testing system in a cryogenic high-pressure environment.
Background
The hydrogen energy can be widely applied to fuel cell vehicles, power generation, energy storage and the like. In order to improve the hydrogen storage density, researchers propose to combine high-pressure gaseous hydrogen storage and low-temperature liquid hydrogen storage technologies, and to develop low-temperature high-pressure composite hydrogen storage by replacing an inner container with lower working pressure in the conventional vehicle-mounted liquid hydrogen container with a composite material gas cylinder used in high-pressure hydrogen storage. However, extreme environments formed by the combined action of low temperature and high pressure have extremely high performance requirements on parts such as containers, pipelines, control valves and the like, so that a special performance test analysis platform under the low temperature and high pressure environment needs to be designed, and a foundation is laid for quality monitoring of cryogenic high-pressure series products from sample trial production, small test to later-stage industrialization process.
However, the existing low-temperature test system can only provide low-temperature measurement working conditions under normal pressure or low-pressure environment, for example, a low-temperature test box (chinese patent, publication No. CN102353582A) for superconducting material mechanical property test, a superconducting material mechanical property test device (chinese patent, publication No. CN 106018062A) under multi-environmental field, etc., cannot form a composite environment of low temperature and high pressure, and thus, the judgment on the structure and material properties under extreme working conditions is prone to be biased.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a component performance testing system in a cryogenic high-pressure environment.
The technical scheme is as follows: in order to solve the technical problem, the component performance testing system under the cryogenic high-pressure environment comprises a vacuum protection cabin for placing a component to be tested, wherein the vacuum protection cabin is connected with a high-pressure gas supply system and a low-temperature fluid supply system; the high-pressure gas supply system comprises a low-pressure gas cylinder, a low-pressure stop valve, a booster pump, a first high-pressure stop valve, a pressure regulating valve and a second high-pressure stop valve which are connected in sequence, wherein the first high-pressure stop valve and the second high-pressure stop valve are connected through a high-pressure gas supply pipeline; the low-temperature fluid supply system comprises a liquid Dewar, a low-temperature pressure regulating valve and a low-temperature high-pressure stop valve which are connected in sequence, and the low-temperature high-pressure stop valve is connected with the vacuum protection cabin through a low-temperature fluid supply pipeline.
Wherein, the high-pressure gas supply system is also connected with a discharge system for discharging waste gas.
The third high-pressure stop valve is connected with the vacuum protection cabin through a discharge pipeline.
Wherein, the vacuum protection cabin comprises a cylinder body which is detachably connected and a top cover plate which is arranged on the cylinder body.
Wherein, the barrel is provided with a lifting lug.
Wherein, be provided with second temperature sensor and pressure sensor interface on the apron of top.
Wherein, be provided with evacuation valve and fourth high pressure stop valve on the apron of top.
And a fifth high-pressure stop valve is arranged between the vacuum pumping valve and the top cover plate.
Wherein, still be provided with high-pressure buffer gas cylinder between first high pressure stop valve and the pressure-regulating valve.
And a pressure gauge is also arranged between the first high-pressure stop valve and the pressure regulating valve.
Has the advantages that: the invention has the following beneficial effects:
the invention can form a low-temperature and high-pressure composite environment, and the structure and material performance judgment under the extreme working condition is not easy to generate deviation.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
The component performance testing system under the cryogenic high-pressure environment as shown in fig. 1 comprises a vacuum protection cabin 2 for placing a component 1 to be tested, wherein the vacuum protection cabin 2 is connected with a high-pressure gas supply system and a low-temperature fluid supply system; the high-pressure gas supply system comprises a low-pressure gas bottle 17, a low-pressure stop valve 18, a booster pump 19, a first high-pressure stop valve 20, a pressure regulating valve 23 and a high-pressure stop valve 24 which are connected in sequence, wherein the high-pressure stop valves are connected through a high-pressure gas supply pipeline 3; the low-temperature fluid supply system comprises a liquid Dewar 25, a low-temperature pressure regulating valve 26 and a low-temperature second high-pressure stop valve 27 which are connected in sequence, wherein the low-temperature second high-pressure stop valve 27 is connected with the vacuum protection chamber 2 through the low-temperature fluid supply pipeline 4. The vacuum protection cabin 2 is further connected with a discharge system for discharging waste gas, the discharge system comprises a third high-pressure stop valve 29, a first temperature sensor 30 and an air-cooled evaporator 31 which are sequentially connected, and the third high-pressure stop valve 29 is connected with the vacuum protection cabin 2 through a discharge pipeline 7. The vacuum protection cabin 2 comprises a cylinder body 13 which is detachably connected and a top cover plate 5 which is arranged on the cylinder body 13. The barrel 13 is provided with a lifting lug 15. The top cover plate 5 is provided with a second temperature sensor 9 and a pressure sensor 8, and the top cover plate 5 is also provided with a vacuum pumping valve 11 and a fourth high-pressure stop valve 12. A fifth high-pressure stop valve 10 is arranged between the vacuumizing valve 11 and the top cover plate 5, and a high-pressure buffer gas cylinder 21 is also arranged between the first high-pressure stop valve 20 and the pressure regulating valve 23. A pressure gauge 22 is also provided between the first high-pressure cutoff valve 20 and the pressure regulating valve 23.
The cryogenic high-pressure environment can be generated in the part to be tested 1 by sequentially starting the low-temperature fluid supply system and the high-pressure gas supply system, the fluid in the part to be tested 1 is discharged through the discharge pipeline 7 after the test, and the discharge pipeline 7 is connected with the high-pressure supply system outside the vacuum protection cabin 2. Adopt between top apron 5 and barrel 13 and to dismantle connected mode, need open top apron 5 when changing the piece 1 that awaits measuring, expose the spare part that awaits measuring and change through lifting lug 15 on the removal barrel 13. The high-pressure gas supply pipeline 3 is connected to the upper part of the part to be measured 1, and the low-temperature fluid supply pipeline 4 is connected to the lower part of the part to be measured 1, so that the low-temperature fluid is prevented from flowing backwards.
Example 1
The performance test of the cryogenic high-pressure parts at-200 ℃ and 20MPa comprises the following steps: the low-temperature fluid supply system adopts liquid nitrogen as a refrigeration source, namely the liquid nitrogen is stored in the liquid dewar 25, the high-pressure gas supply system adopts high-pressure helium or nitrogen, namely helium or nitrogen with the pressure of 15MPa is stored in the low-pressure gas bottle 17, the pressure of the high-pressure gas supply system is increased to 20MPa or other specified pressure by a booster pump 19 configured with corresponding gas, the high-pressure gas supply system is stored in the high-pressure buffer gas bottle 21, and a tail end stop valve is used for pipeline control. When the test is started, firstly introducing the low-temperature fluid, closing the high-pressure gas supply pipeline 3, and opening the discharge pipeline 7 to pre-cool the pipeline inside the vacuum protection cabin 2 and the piece to be tested, when the temperature sensor 30 detects that the temperature reaches the pre-cooling completion temperature, closing the discharge pipeline 7 and the low-temperature fluid supply system, at this time, part of low-temperature liquid should still remain inside the piece to be tested to cool the subsequent high-pressure gas, opening the high-pressure gas supply pipeline 3 to generate a low-temperature high-pressure composite working condition, and then performing data acquisition through the pressure sensor of the vacuum protection cabin 2.
Example 2
-253 ℃ and 20MPa of cryogenic high-pressure component performance test: liquid hydrogen is adopted in a low-temperature fluid supply system as a refrigeration source, namely, the liquid hydrogen is stored in a liquid Dewar 25, high-pressure helium or hydrogen is adopted in a high-pressure gas supply system, namely, helium or hydrogen with the pressure of 15MPa is stored in a low-pressure gas cylinder 17, the pressure of the high-pressure gas supply system is increased to 20MPa or other specified pressure by configuring a booster pump of corresponding gas, the high-pressure gas supply system is stored in a high-pressure buffer gas cylinder 21, a tail end stop valve is utilized for pipeline control, and a nitrogen positive pressure explosion-proof device is required to be additionally arranged at positions such as an electromagnetic valve positioner and a circuit. When the test is started, firstly introducing the low-temperature fluid, closing the high-pressure gas supply pipeline 3, and opening the discharge pipeline 7 to pre-cool the pipeline inside the vacuum protection cabin 2 and the piece to be tested, when the temperature sensor 30 detects that the temperature reaches the pre-cooling completion temperature, closing the discharge pipeline 7 and the low-temperature fluid supply system, at this time, part of low-temperature liquid should still remain inside the piece to be tested to cool the subsequent high-pressure gas, opening the high-pressure gas supply pipeline 3 to generate a low-temperature high-pressure composite working condition, and then performing data acquisition through the pressure sensor of the vacuum protection cabin 2.
Example 3
And (3) testing the performance of cryogenic high-pressure parts under other low-temperature and high-pressure combinations: the fluid in the low-temperature fluid supply system is used as heat medium liquid helium, liquid hydrogen, liquid nitrogen or other common refrigerants, the liquid Dewar 25 is replaced by a refrigerating machine, and the refrigerating capacity of the refrigerating machine is transmitted to the piece to be measured through the heat medium. The high-pressure gas supply system adopts high-pressure helium, the pressure of the high-pressure gas supply system is increased to 20MPa or other specified pressure by a booster pump configured with corresponding gas, the high-pressure gas supply system is stored in a high-pressure buffer gas cylinder 21, and a tail end stop valve is used for pipeline control.
Example 4
Testing the pressure fatigue performance of the parts in the cryogenic environment: firstly, introducing low-temperature fluid to pre-cool the pipeline in the vacuum protection chamber 2 and the to-be-measured piece, when the temperature sensor 30 detects that the temperature reaches the pre-cooling completion temperature, closing the discharge pipeline 7 and the low-temperature fluid supply system, at the moment, part of low-temperature liquid still remains in the to-be-measured piece to be used for cooling subsequent high-pressure gas, opening the high-pressure gas supply pipeline 3 to generate a low-temperature high-pressure composite working condition, and setting the opening time and the output pressure curve of the stop valve 24, the pressure regulating valve 23 and the stop valve 29 in the discharge pipeline according to the. When the pressure of the high-pressure buffer gas cylinder 21 is insufficient, closing the stop valve 24, opening the booster pump 19, the low-pressure stop valve 18 and the high-pressure stop valve 20 to boost the high-pressure buffer gas cylinder 21; when the temperature detected by the thermometer 30 in the discharge pipeline is lower than a certain threshold value, and the low-temperature fluid in the current to-be-detected piece is judged to be completely heated and taken away by the high-pressure gas, the pipeline high-pressure generation and discharge pipeline is restarted, the low-temperature pipeline is restarted to inject the low-temperature fluid for cooling, and the high-pressure and discharge pipeline is restarted to continue pressure circulation after the low temperature is recovered.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A spare part capability test system under cryrogenic high pressure environment which characterized in that: the device comprises a vacuum protection cabin (2) for placing a part (1) to be tested, wherein the vacuum protection cabin (2) is connected with a high-pressure gas supply system and a low-temperature fluid supply system and is connected into the part to be tested through a pipeline in the vacuum protection cabin; the high-pressure gas supply system comprises a low-pressure gas bottle (17), a low-pressure stop valve (18), a booster pump (19), a first high-pressure stop valve (20), a pressure regulating valve (23) and a second high-pressure stop valve (24) which are connected in sequence, and the high-pressure stop valves are connected through a high-pressure gas supply pipeline (3); the low-temperature fluid supply system comprises a liquid Dewar (25), a low-temperature pressure regulating valve (26) and a low-temperature high-pressure stop valve (27) which are sequentially connected, wherein the low-temperature high-pressure stop valve (27) is connected with the vacuum protection cabin (2) through a low-temperature fluid supply pipeline (4).
2. The component performance testing system under the cryogenic high-pressure environment according to claim 1, characterized in that: the high-pressure gas supply system is also connected with a discharge system for discharging waste gas.
3. The component performance testing system under the cryogenic high-pressure environment according to claim 2, characterized in that: the discharge system comprises a third high-pressure stop valve (29), a first temperature sensor (30) and an air-cooled evaporator (31) which are sequentially connected, and the third high-pressure stop valve (29) is connected with the vacuum protection cabin (2) through a discharge pipeline (7).
4. The component performance testing system under the cryogenic high-pressure environment according to claim 1, characterized in that: the vacuum protection cabin (2) comprises a cylinder body (13) which is detachably connected and a top cover plate (5) arranged on the cylinder body (13).
5. The component performance testing system under cryogenic high-pressure environment according to claim 4, characterized in that: the barrel (13) is provided with a lifting lug (15).
6. The component performance testing system under cryogenic high-pressure environment according to claim 4, characterized in that: and the top cover plate (5) is provided with an interface for connecting a second temperature sensor (9) and a pressure sensor (8).
7. The component performance testing system under cryogenic high-pressure environment according to claim 4, characterized in that: the top cover plate (5) is provided with a vacuum pumping valve (11) and a fourth high-pressure stop valve (12).
8. The component performance testing system under cryogenic high-pressure environment according to claim 7, characterized in that: a fifth high-pressure stop valve (10) is arranged between the vacuum-pumping valve (11) and the top cover plate (5).
9. The component performance testing system under the cryogenic high-pressure environment according to claim 1, characterized in that: a high-pressure buffer gas cylinder (21) is also arranged between the first high-pressure stop valve (20) and the pressure regulating valve (23).
10. The component performance testing system under the cryogenic high-pressure environment according to claim 1, characterized in that: and a pressure gauge (22) is also arranged between the first high-pressure stop valve (20) and the pressure regulating valve (23).
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| CN201811513272.6A CN109612700B (en) | 2018-12-11 | 2018-12-11 | Component performance test system under cryogenic high-pressure environment |
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| CN109612700B true CN109612700B (en) | 2021-03-19 |
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| CN114136566B (en) * | 2021-11-29 | 2023-03-28 | 东南大学 | System and method for testing shaking of container in cryogenic high-pressure environment |
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