CN102353583A - Temperature control system for superconducting material mechanical property test system - Google Patents
Temperature control system for superconducting material mechanical property test system Download PDFInfo
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- CN102353583A CN102353583A CN2011101978249A CN201110197824A CN102353583A CN 102353583 A CN102353583 A CN 102353583A CN 2011101978249 A CN2011101978249 A CN 2011101978249A CN 201110197824 A CN201110197824 A CN 201110197824A CN 102353583 A CN102353583 A CN 102353583A
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- liquid nitrogen
- temperature control
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- mechanical property
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 title abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 27
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002887 superconductor Substances 0.000 claims description 16
- 230000000153 supplemental effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 2
- 238000007654 immersion Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
A temperature control system for a superconducting material mechanical property test system relates to a superconducting material measurement technology, specifically to a temperature control system during its measuring process. The temperature control system for the superconducting material mechanical property test system comprises a temperature control case, an experiment case and a liquid nitrogen unit. The experiment case is structured in a two-layer space: one layer is connected to a liquid nitrogen pot and is equipped with a thermo-compensation system which is electrically connected with the temperature control case; the other layer is equipped with a mechanical property test component and a temperature sensor which is electrically connected with the temperature control case. The liquid nitrogen unit is provided with a liquid nitrogen thermocouple which is electrically connected with the temperature control case. The low temperature experiment case for the superconducting material mechanical property test can provide a wider range of environment for the temperature mechanical testing, can be extensively applied, and has advantages of high measurement precision, low cost and short test time.
Description
Technical field
The present invention relates to the superconductor measuring technique, specifically be meant the temperature control system in its measuring process.
Background technology
At present, in the superconductor measuring technique, mechanics performance testing technology under the immersion type low temperature is aimed at the mechanics performance testing technology of superconductor under the particular surroundings.
Mechanics performance testing technology under the above-mentioned immersion type low temperature specifically comprises: test specimen is placed in the Dewar flask that fills cryogenic coolant, the sample that utilization is outside also stretches to sample, with the mechanical property of test sample sample under a certain specified temp.
In realizing process of the present invention, the inventor finds that there is following defective at least in mechanics performance testing technology under the above-mentioned immersion type low temperature:
⑴ the scope of application is little: can only under the specified temp environment, make an experiment, can not under alternating temperature degree environment, make an experiment;
⑵ measuring accuracy is low: if adopt immersion type, sample need steep in the cooling medium (like liquid nitrogen), and cooling medium can produce certain buoyancy, influences the measuring accuracy of deformation-sensor (strainmeter); In addition, immersion type test rate of temperature fall is the amount an of the unknown, can't accurately control in the sample, therefore, for those materials responsive to rate of temperature fall, influences its measuring accuracy greatly;
⑶ cost is high: need be dipped into test sample in the cooling medium before the immersion type test, after the off-test, cooling medium can not reclaim, and causes the certain economic loss;
⑷ test period is long: when test sample is connected with test fixture, because artificial factor sample can take place unavoidably comes off, if adopt immersion type, when sample comes off, when connecting test again, need quite loaded down with trivial details process, wasted test period greatly.
Summary of the invention
The technical matters that the present invention will solve is to overcome the defective that equipment is tested in existing superconductor Mechanics Performance Testing, and a kind of low temperature test case is provided, to realize that the scope of application is big, measuring accuracy is high, the low advantage short with test period of cost.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
The temperature control system of superconductor mechanical property testing system comprises temperature-controlled cabinet, and test macro also comprises experimental box and liquid nitrogen unit; Said experimental box is double-deck space structure, and its one deck is connected with liquid nitrogen container, and is provided with the thermal compensation system that is electrically connected with temperature-controlled cabinet, and another layer is provided with Mechanics Performance Testing assembly and temperature sensor, and temperature sensor is electrically connected with temperature-controlled cabinet; The liquid nitrogen unit is provided with the liquid nitrogen thermopair that is electrically connected with temperature-controlled cabinet.
Said thermal compensation system comprises the supplemental heat galvanic couple, and the compensation thermopair is electrically connected with temperature-controlled cabinet.
Superconductor Mechanics Performance Testing of the present invention can provide the more temperature mechanics test environment of widening range with the low temperature test case; The temperature test scope is from 100 ℃～-196 ℃; High-temperature region (100 ℃), low-temperature space (< 120 ℃) have been comprised, a plurality of warm areas such as ultra-low temperature region (< 150 ℃); The scope of application is little in the prior art, measuring accuracy is low, cost is high and the defective of test period length thereby can overcome, to realize that the scope of application is big, measuring accuracy is high, the low advantage short with test period of cost.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 be according to the present invention the superconductor Mechanics Performance Testing with the structural representation of low temperature test case;
In conjunction with accompanying drawing, Reference numeral is following in the embodiment of the invention:
1-low temperature test case; The 2-blower motor; The 3-bearing; The 4-lower link; 5-lower clamp body; 6-superconductor sample; The 7-upper connecting rod; The 8-web member; The 9-load sensor; The 10-temperature sensor; 11-compensates thermocouple; The 12-temperature-controlled cabinet; The 13-liquid nitrogen container; 14-liquid nitrogen spraying amount control device; 15-liquid nitrogen thermopair.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Embodiment 1
As shown in Figure 1; The superconductor Mechanics Performance Testing low temperature test case according to the present invention; Comprise casing 1; In the said casing is double-deck space structure; Its one deck is connected with liquid nitrogen container 13 through liquid nitrogen spraying amount control device 14, and is provided with air circulating system and thermal compensation system, and another layer is provided with Mechanics Performance Testing assembly and temperature sensor 10; Temperature sensor 10 is electrically connected with temperature-controlled cabinet 12, and the temperature sensor of present embodiment is the PT100 thermal resistance temperature sensor; Connect connection through air circulating system between the double-deck space structure.Casing 1 is the double-layer stainless steel body, and interlayer is filled with low heat-conducting system expansion type insulator, and temperature is kept evenly, and heat fluctuation is less, simultaneously, has practiced thrift experimentation cost greatly.
Air circulating system comprises circulating fan 16, and it is connected with blower motor 2 through bearing 3, recirculating air, and 16 comprise the fan blade that adopts epoxy material to process, its air outlet is the connector of double-deck space structure.The thermal compensation system comprises compensation thermopair 11, and compensation thermopair 11 is electrically connected with temperature-controlled cabinet 12.
The Mechanics Performance Testing assembly comprises last clamp body and the lower clamp body 5 that is clamped in superconductor sample 6 two ends respectively; Be located at the lower link 4 of lower clamp body 5 lower ends, and bottom-up upper connecting rod 7, the web member 8 and load sensor 9 that is equipped with successively in last clamp body upper end.
In the present embodiment, in the inside of liquid nitrogen container 13, be provided with the liquid nitrogen spraying amount control device 14 that the delivery outlet with liquid nitrogen container 13 is connected; In the inside of liquid nitrogen container 13, also be provided with liquid nitrogen thermopair 15, liquid nitrogen thermopair 15 is connected through lead and temperature-controlled cabinet 12.
The front and back double-decker design of casing, one deck of casing is the placement space of superconductor sample and temperature sensor, can detect the temperature conditions in the casing; One deck is provided with the air circulating system of adjustable power in the back of casing; In temperature-fall period; Start high-power air circulating system; The temperature of layer box body reaches even before can making at short notice; Because air circulating system can influence measuring accuracy in the superconductor sample testing, therefore when experimental test begins, change the wind circulation of turning down power; So just can neither influence the precision of test, can continue to keep the temperature in the casing again.
Through temperature-controlled cabinet, can control the thermocouple heating in the liquid nitrogen container, make liquid nitrogen gasification; Reach the purpose of pressurization; And then the liquid nitrogen in the liquid nitrogen container is sprayed in the casing through corrugated tube, and be transported to the test section by circulating fan, make the superconductor sample be in the homogeneous temperature field.
During test, temperature-controlled cabinet can be compared according to temperature sensor measured temperature and given cooling temperature, and carries out regulating automatically in real time, to reach constant rate of temperature fall.After reaching the setting working temperature, the duty of liquid nitrogen spraying certainly will not can stop immediately, and the surplus of liquid nitrogen also can continue to spray into casing, like this, will cause the temperature in the casing can continue to reduce, and can't arrive design temperature.Be different from traditional heat sink; This temperature-controlled cabinet adopts the double compensation control mode; The compensation thermopair promptly is installed in casing; Temperature-controlled cabinet can be controlled liquid nitrogen thermocouple and the interior compensation thermopair of casing in the liquid nitrogen container simultaneously; When reaching, start the heating of compensation thermocouple, and be lower than the power of liquid nitrogen spraying through the power of program setting compensation thermopair near assigned temperature; Therefore can well control the cooling temperature, prevent the overshoot of temperature.
In sum, cryogenic box of the present invention can provide the more temperature mechanics test environment of widening range, and the temperature test scope is from 100 ℃～-196 ℃, has comprised high-temperature region (100 ℃), low-temperature space (< 120 ℃), a plurality of warm areas such as ultra-low temperature region (< 150 ℃); Thereby the defective long with test period that can overcome that the scope of application is little in the prior art, measuring accuracy is low, cost is high is to realize that the scope of application is big, measuring accuracy is high, cost is low and short excellent of test period.。
What should illustrate at last is: the above only is the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art; It still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the temperature control system of superconductor mechanical property testing system comprises temperature-controlled cabinet, it is characterized in that: said test macro also comprises experimental box and liquid nitrogen unit; Said experimental box is double-deck space structure, and its one deck is connected with liquid nitrogen container, and is provided with the thermal compensation system that is electrically connected with temperature-controlled cabinet, and another layer is provided with Mechanics Performance Testing assembly and temperature sensor, and temperature sensor is electrically connected with temperature-controlled cabinet; The liquid nitrogen unit is provided with the liquid nitrogen thermopair that is electrically connected with temperature-controlled cabinet.
2. superconductor Mechanics Performance Testing low temperature test case according to claim 1 is characterized in that: said thermal compensation system comprises the supplemental heat galvanic couple, and the compensation thermopair is electrically connected with temperature-controlled cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110197824 CN102353583B (en) | 2011-07-14 | 2011-07-14 | Temperature control system for superconducting material mechanical property test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110197824 CN102353583B (en) | 2011-07-14 | 2011-07-14 | Temperature control system for superconducting material mechanical property test system |
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| Publication Number | Publication Date |
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| CN102353583A true CN102353583A (en) | 2012-02-15 |
| CN102353583B CN102353583B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110197824 Expired - Fee Related CN102353583B (en) | 2011-07-14 | 2011-07-14 | Temperature control system for superconducting material mechanical property test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015172541A1 (en) * | 2014-05-15 | 2015-11-19 | 深圳大学 | Shape memory performance tester |
| CN107861543A (en) * | 2017-12-27 | 2018-03-30 | 浙江工业大学 | A kind of microtensile testing machine temperature control box |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008058017A (en) * | 2006-08-29 | 2008-03-13 | Shimadzu Corp | Metal thermal fatigue testing machine |
| CN101852703A (en) * | 2010-05-26 | 2010-10-06 | 北京航空航天大学 | Ultra-low temperature constant temperature grabbing bar device |
| CN101893721A (en) * | 2010-06-28 | 2010-11-24 | 吉林大学 | Wide-dynamic-range high-temperature superconducting magnetometer |
| CN202149868U (en) * | 2011-07-14 | 2012-02-22 | 兰州大学 | Temperature control system of mechanical property test system for superconductor material |
-
2011
- 2011-07-14 CN CN 201110197824 patent/CN102353583B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008058017A (en) * | 2006-08-29 | 2008-03-13 | Shimadzu Corp | Metal thermal fatigue testing machine |
| CN101852703A (en) * | 2010-05-26 | 2010-10-06 | 北京航空航天大学 | Ultra-low temperature constant temperature grabbing bar device |
| CN101893721A (en) * | 2010-06-28 | 2010-11-24 | 吉林大学 | Wide-dynamic-range high-temperature superconducting magnetometer |
| CN202149868U (en) * | 2011-07-14 | 2012-02-22 | 兰州大学 | Temperature control system of mechanical property test system for superconductor material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015172541A1 (en) * | 2014-05-15 | 2015-11-19 | 深圳大学 | Shape memory performance tester |
| CN107861543A (en) * | 2017-12-27 | 2018-03-30 | 浙江工业大学 | A kind of microtensile testing machine temperature control box |
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| CN102353583B (en) | 2013-04-17 |
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Granted publication date: 20130417 |