CN105928975A - Variable-atmosphere pressure heat conductivity coefficient testing device based on transient plane source method - Google Patents
Variable-atmosphere pressure heat conductivity coefficient testing device based on transient plane source method Download PDFInfo
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- CN105928975A CN105928975A CN201610378618.0A CN201610378618A CN105928975A CN 105928975 A CN105928975 A CN 105928975A CN 201610378618 A CN201610378618 A CN 201610378618A CN 105928975 A CN105928975 A CN 105928975A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
Abstract
The invention relates to a variable-atmosphere pressure heat conductivity coefficient testing device based on a transient plane source method. A double-screw test probe is arranged between two same tested materials with smooth surfaces, the tested materials and the test probe are integrally arranged in a tube-type high temperature furnace, a controllable environment temperature is provided for the tube-type high temperature furnace and a temperature control system, a high pressure air source is matched with a molecular pump to control the type and pressure of the atmosphere inside the high temperature furnace, a data collection and control system is connected with a temperature control system and a Hot Disk conductometer respectively, the Hot Disk conductometer connected with the double-screw test probe is used for providing test power and heating time for the double-screw test probe, and the data collection and control system is used for obtaining the heat conductivity coefficients and heat diffusion coefficients of the tested materials according to theoretical calculation of the transient plane source method. The heat conductivity coefficient test for the transient plane source method under a variable-atmosphere pressure condition is realized for the first time internationally, and the atmosphere pressure range of porous material heat conductivity coefficient test is the maximum test range reported domestically at present.
Description
Technical field:
The invention belongs to field of measuring technique, be specifically related to a kind of changing the flow of QI-blood atmosphere pressure based on Adsorbent By Using Transient Plane Source Technique
Power test device of thermal conductivity coefficient.
Background technology:
Porous material, because of features such as its density are little, light weight, specific surface area are big, has the physical property of excellence,
If the material of high porosity is frequently as heat-insulating heat-preserving material, Aero-Space, derived energy chemical, petroleum transportation and
The aspect tools such as building are widely used.When porous material uses as heat-barrier material, its heat-proof quality can be by hole
Rate, fills atmosphere, the impact of the factor such as atmosphere pressures and temperature, and studies porous material under different atmosphere pressures
The Changing Pattern of material heat conductivity is predicted all for material heat-proof quality optimization design and Service Environment heat-proof quality
Significant.
At present, the Determination of conductive coefficients under the porous material of domestic report becomes atmosphere pressures is based primarily upon thermal transient
Line, torrid zone method, test pressure is not higher than ambient pressure and test material volume is relatively big, at 100-1000cm3
Left and right.External aspect, porous material become the widest pressure limit of atmosphere pressures Determination of conductive coefficients system into
10Pa-10MPa, method of testing is heat-pole method, but its superatmospheric and subatmospheric test exist respectively
Carrying out in two covering devices, when normal pressure, the test result of two covering devices is discontinuous, device complexity and same material
Sample requirement is bigger.Adsorbent By Using Transient Plane Source Technique is because of its convenient test, and material preparation requires low, and size is less than
10cm3, precision advantages of higher, it is widely used in recent years, convenient test, but have no at present and use this
The report of heat conductivity under method test porous material different atmosphere pressures.
Summary of the invention:
It is an object of the invention to be to provide a kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique
Test device.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that and realizes:
A kind of change atmosphere pressures test device of thermal conductivity coefficient based on Adsorbent By Using Transient Plane Source Technique, surveys including Double helix
Probe header, tube type high-temperature furnace, temperature control system, Hot Disk conductometer, acquisition and control system, high pressure
Source of the gas and molecular pump group；Wherein,
Double helix test probe is positioned over that two pieces identical and between the measured material of surfacing, measured material and
Test probe entirety is positioned in tube type high-temperature furnace, tube type high-temperature furnace and temperature control system provide controlled environment
Temperature, high-pressure air source and molecular pump assemble and close the Atmosphere type and pressure, data acquisition controlled in tube type high-temperature furnace
Collection be connected with temperature control system and Hot Disk conductometer respectively with control system, and with Double helix test probe phase
Hot Disk conductometer even provides measured power and heat time heating time for Double helix test probe, by data acquisition
With heat conductivity and the thermal diffusion system that control system foundation Adsorbent By Using Transient Plane Source Technique Theoretical Calculation obtains measured material
Number.
The present invention is further improved by: be provided with pressure on the pipeline of high-pressure air source connection tube type high-temperature furnace
Table.
The present invention is further improved by: be respectively arranged with the first control valve on the pipeline of Pressure gauge both sides
Valve is controlled with second.
The present invention is further improved by: be provided with the 3rd on the pipeline of molecular pump group connection tube type high-temperature furnace
Control valve and the 4th and control valve.
The present invention is further improved by: the 3rd controls to set on the pipeline that valve and the 4th controls between valve
It is equipped with the first vacuometer, the pipeline between the 4th control valve and molecular pump group is provided with the second vacuometer.
The present invention is further improved by: molecular pump group includes mechanical pump and the molecular pump being sequentially connected with.
The present invention is further improved by: containing control circuit, constant-current source and data in Hot Disk conductometer
Harvester, for controlling the input power of Double helix test probe, Double helix test is also visited by heat time heating time
Head temperature rise is acquired.
The present invention is further improved by: it is 25mm that molecular pump group connects the pipe diameter of tube type high-temperature furnace.
The present invention is further improved by: the stress test scope of tube type high-temperature furnace is 0.01Pa-1MPa, temperature
Degree test scope is room temperature-800 DEG C.
Compared with prior art, the present invention has the significant advantage that and realizes first based on Adsorbent By Using Transient Plane Source Technique
The Determination of conductive coefficients of porous material under different atmosphere pressures, played Adsorbent By Using Transient Plane Source Technique test accurately,
Test sample is required low feature；When aircraft is on active service in high-altitude, ambiance pressure is less than surface air pressure,
Measure thermal protection porous heat insulation material heat conductivity under certain vacuum degree based on the present invention, be conducive to heat anti-
Heat-proof quality accurate evaluation under the actual Service Environment of protecting system；Under porous heat insulation material different atmosphere pressures
Heat conductivity experimental studies results may be used to analyze the gas phase heat conduction Influencing Mechanism to porous material heat-proof quality,
There is provided real for checking porous material gas phase heat conduction theory, guiding material structure Design and optimization material heat-proof quality
Test foundation；System is simple, can directly improve, stress test wide ranges in existing Hot Disk system
0.01Pa-1MPa, it is possible to same to time varying temperature, scope is: room temperature-800 DEG C；Also cavity can the most individually be set up
With test system, the atmosphere pressures test upper limit can further improve.
Accompanying drawing illustrates:
Fig. 1 is assembly of the invention schematic diagram.
Detailed description of the invention:
Below in conjunction with the accompanying drawings the present invention is described in further detail.
As it is shown in figure 1, a kind of change atmosphere pressures Determination of conductive coefficients based on Adsorbent By Using Transient Plane Source Technique of the present invention
Device, including measured material 1, Double helix test probe 2, tube type high-temperature furnace 3, temperature control system 4, Hot Disk
Conductometer 5, acquisition and control system 6, high-pressure air source 7, first control valve the 8, second control valve
It is true that door 9, Pressure gauge the 10, the 3rd control valve the 11, first vacuometer the 12, the 4th control valve 13, second
Empty meter 14 and molecular pump group 15, wherein molecular pump group 15 includes mechanical pump 16 and molecular pump 17.
When using Hot Disk conductometer 5 based on Adsorbent By Using Transient Plane Source Technique to carry out Determination of conductive coefficients, will be double
Spiral test probe 2 is placed in that two pieces identical and between the test material 1 of surfacing, Double helix test probe 2
It is connected, according to measured material a kind, size with Hot Disk conductometer 5 based on Adsorbent By Using Transient Plane Source Technique
With the difference of test environment, select different size and the Double helix test probe 2 of type, and by Hot Disk
Conductometer 5 provides corresponding measured power and time, and Double helix test probe 2 is simultaneously as thermal source and temperature
Sensor, in test process, the Hot Disk conductometer 5 that is raised through of its temperature measures and is input to number
Carry out data process according to gathering with control system 6, be calculated heat conductivity and the thermal diffusion of measured material 1
Coefficient.
Containing control circuit, constant-current source and data acquisition unit in Hot Disk conductometer 5, control Double helix and survey
The input power of probe header 2, is also acquired Double helix test probe 2 temperature rise heat time heating time.According to wink
The state plane heat resource method theory of testing, in conjunction with input power, heat time heating time, the information such as sonde configuration parameter can be adopted
Test software with Hot Disk or obtain heat conductivity and the thermal diffusion of measured material according to theory of testing self-programming
Coefficient, the test philosophy of Adsorbent By Using Transient Plane Source Technique sees patent WO 89/08837 or patent US 5044767.
Double helix test probe 2 Determination of conductive coefficients at different temperatures needs measured material 1 and double spiral shell
Rotation test probe 2 is placed in tube type high-temperature furnace 3, and tube type high-temperature furnace 3 uses electrical heating, and temperature is by temperature control system
System 4 is controlled, and in-furnace temperature is acquired by acquisition and control system 6 and controls, and Double helix is surveyed
Probe header 2 is drawn through tube type high-temperature furnace 3 cavity termination, draws wire in tube type high-temperature furnace 3 cavity end,
End wire coated with high-temperature ceramics insulation and connects sealing, Double helix test probe 2 through high temperature resistant binder
Wire draw after be connected with Hot Disk conductometer 5, the cavity termination of tube type high-temperature furnace 3 is by bolt and chamber
Body connects, and installs high-temperature resistant rubber circle and guarantee the sealing of cavity.
Under test different atmosphere pressures, the heat conductivity of porous material needs to test measured material 1 and Double helix
Probe 2 is placed in tube type high-temperature furnace 3, outside keeping Double helix test probe 2 with tube type high-temperature furnace 3 before test
Junction, portion seals, and closes the first control valve 8, opens the 3rd control valve 11 and the 4th and controls valve 13,
Open the mechanical pump 16 in molecular pump group 15, the gas in tube type high-temperature furnace 3 and pipeline is extracted out, get rid of quilt
Measure and monitor the growth of standing timber material 1 in foreign gas or the steam of absorption, when first vacuometer in tube type high-temperature furnace 3 exit
12 and molecular pump group 15 before the reading of the second vacuometer 14 be reduced to below 100Pa after open molecular pump group
Molecular pump 17 in 15 continues evacuation, until atmosphere pressures is down to below 0.01Pa.Close the 4th control
Valve 13, closes molecular pump group 17, and molecular pump group 17 closes mechanical pump 16 after stopping operating, and opens high pressure
The air relief valve of source of the gas 7, opens the second control valve 9, slowly opens the first control valve 8 to tube type high-temperature furnace
Interior 3 inject target atmosphere, notice that the aperture of the first control valve 8 makes the reading of Pressure gauge 10 be not less than 1
Individual atmospheric pressure, the simultaneously reading of the second vacuometer 12 on observation tube type high-temperature furnace, when close to 1 atmospheric pressure
Close the air relief valve of high-pressure air source 7, close the second control valve 9, close the first control valve 8.Continue to beat
Open the 4th control valve 13, tube type high-temperature furnace 3 and pipeline carried out evacuation, repeat the above steps twice with
Fully get rid of tube type high-temperature furnace 3, the foreign gas within pipeline and measured material 1.
Under the different vacuum of test, the heat conductivity of measured material 1, the last time after evacuation, closes
Close the 4th control valve 13, close molecular pump 17, close mechanical pump 16, pass through acquisition and control system
6 and temperature control system 4 set the temperature of tube type high-temperature furnace 3, tube type high-temperature furnace 3 arrive target temperature and stable after,
Open the air relief valve of high-pressure air source 7, open the second control valve 9, slowly open the first control valve 8 and regulate
The atmosphere pressures of 3 in tube type high-temperature furnace, notices that the aperture of regulation the first control valve 8 makes Pressure gauge 10
Reading is not less than 1 atmospheric pressure, closes high pressure gas when the first vacuometer 12 reading reaches the vacuum set
The air relief valve in source 7, cuts out the first control valve 8, closes the second control valve 9, waits 1-2 hour to quilt
Determination of conductive coefficients is carried out after material 1 internal temperature and the atmosphere pressure stability of measuring and monitoring the growth of standing timber.
The heat conductivity of measured material 1 under test superatmospheric environment, the last time after evacuation,
Close the 4th control valve 13, close molecular pump 17, close mechanical pump 16, by data acquisition and control system
System 6 and temperature control system 4 set the temperature of tube type high-temperature furnace 3, and it is the most steady that tube type high-temperature furnace 3 arrives target temperature
After Ding, open the air relief valve of high-pressure air source 7, open the second control valve 9, slowly open the first control valve
The atmosphere pressures of 3 in 8 regulation tube type high-temperature furnaces, notices that the aperture of regulation the first control valve 8 makes Pressure gauge
The reading of 10 is not less than 1 atmospheric pressure, closes valve when the first vacuometer 12 reading is close to 1 atmospheric pressure
11, the reading continuing regulation the first control valve 8 to Pressure gauge 10 reaches closedown high pressure gas after the pressure set
The air relief valve in source 7, close second control valve 9, wait 1-2 hour gentle to measured material 1 internal temperature
Determination of conductive coefficients is carried out after atmosphere pressure stability.
Heat conductivity under research measured material 1 different temperatures different atmosphere pressures, tube type high-temperature furnace 3 and quilt
Measure and monitor the growth of standing timber after material 1 reaches target temperature and regulate the atmosphere pressures within tube type high-temperature furnace 3 and measured material 1 again.
By opening and closing high-pressure air source 7 when tube type high-temperature furnace 3 and measured material 1 internal atmosphere pressure deviation setting value
Air relief valve, first controls valve 8, and second controls valve 9, and the 3rd controls valve 11, and the 4th controls valve
13, molecular pump group 15 is adjusted or pressure in pipeline is finely adjusted.
When testing the heat conductivity under nano-porous materials different atmosphere pressures, it is noted that or the survey of authorized pressure
Examination order, it is understood that there may be adsorption desorption return stagnant phenomenon test result under identical atmosphere pressures can be caused different.
The vacuum-pumping pipeline diameter drawn from tube type high-temperature furnace 3 is at more than 25mm.
The present invention is by mechanical pump 16, molecular pump 17, and first controls valve 8, second controls valve the 9, the 3rd
Control valve the 11, the 4th control valve 13 and pipe-line system and existing commercial instrument Hot Disk conductometer 5,
Tube type high-temperature furnace 3 combines, and realizes first under porous material different atmosphere pressures based on Adsorbent By Using Transient Plane Source Technique
Determination of conductive coefficients, stress test scope is 0.01Pa-1MPa, and temperature test scope is room temperature-800 DEG C, as
Individually designed system of bf body is expected to obtain higher measurement pressure.Test nano-porous materials is in different atmosphere pressure
It is noted that or the testing sequence of regulation atmosphere pressures during heat conductivity under power.
Claims (9)
1. a change atmosphere pressures test device of thermal conductivity coefficient based on Adsorbent By Using Transient Plane Source Technique, it is characterised in that:
Including Double helix test probe (2), tube type high-temperature furnace (3), temperature control system (4), Hot Disk conductometer (5),
Acquisition and control system (6), high-pressure air source (7) and molecular pump group (15)；Wherein,
Double helix test probe (2) is positioned over that two pieces identical and between the measured material (1) of surfacing,
Measured material (1) and test probe (2) entirety are positioned in tube type high-temperature furnace (3), by tube type high-temperature furnace
And temperature control system (4) provides controlled ambient temperature, high-pressure air source (7) and molecular pump group (15) (3)
Coordinate the Atmosphere type and pressure controlled in tube type high-temperature furnace (3), acquisition and control system (6) point
Be not connected with temperature control system (4) and Hot Disk conductometer (5), and with Double helix test probe (2) phase
Hot Disk conductometer (5) even is that Double helix test probe (2) provides measured power and heat time heating time,
Measured material (1) is obtained according to Adsorbent By Using Transient Plane Source Technique Theoretical Calculation by acquisition and control system (6)
Heat conductivity and thermal diffusion coefficient.
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 1
Test device, it is characterised in that: it is provided with on the pipeline of high-pressure air source (7) connection tube type high-temperature furnace (3)
Pressure gauge (10).
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 2
Test device, it is characterised in that: it is respectively arranged with the first control valve on the pipeline of Pressure gauge (10) both sides
(8) and the second controls valve (9).
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 3
Test device, it is characterised in that: it is provided with on the pipeline of molecular pump group (15) connection tube type high-temperature furnace (3)
3rd controls valve (11) and the 4th controls valve (13).
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 4
Test device, it is characterised in that: the 3rd controls the pipe that valve (11) and the 4th controls between valve (13)
Being provided with the first vacuometer (12) on road, the 4th controls the pipe between valve (13) and molecular pump group (15)
The second vacuometer (14) it is provided with on road.
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 1
Test device, it is characterised in that: molecular pump group (15) includes mechanical pump (16) and the molecule being sequentially connected with
Pump (17).
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 1
Test device, it is characterised in that: containing control circuit, constant-current source and data in Hot Disk conductometer (5)
Harvester, is used for controlling the input power of Double helix test probe (2), and Double helix is also surveyed by heat time heating time
Probe header (2) temperature rise is acquired.
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 1
Test device, it is characterised in that: it is 25mm that molecular pump group (15) connects the pipe diameter of tube type high-temperature furnace (3).
A kind of change atmosphere pressures heat conductivity based on Adsorbent By Using Transient Plane Source Technique the most according to claim 1
Test device, it is characterised in that: the stress test scope of tube type high-temperature furnace (3) is 0.01Pa-1MPa, temperature
Degree test scope is room temperature-800 DEG C.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706701A (en) * | 2016-12-27 | 2017-05-24 | 中国科学院理化技术研究所 | Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method |
| CN107192734A (en) * | 2017-01-22 | 2017-09-22 | 东南大学 | The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity |
| CN107504924A (en) * | 2017-08-21 | 2017-12-22 | 西安交通大学 | A kind of wide area value thermal contact resistance ternary method of testing and device |
| CN107884435A (en) * | 2017-10-20 | 2018-04-06 | 中国科学院工程热物理研究所 | The device of material thermal conductivity is measured under a kind of high pressure gas environment |
| CN108088869A (en) * | 2017-11-30 | 2018-05-29 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of thermal protection system Heat-Insulation Test device |
| CN108562610A (en) * | 2018-03-13 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of method and system of determining thermal conductivity of rocks |
| CN108693209A (en) * | 2017-04-07 | 2018-10-23 | 核工业北京地质研究院 | A kind of buffering/backfilling material heat conducting coefficient measurement device and method |
| CN109916953A (en) * | 2019-05-06 | 2019-06-21 | 山东众途复合材料有限公司 | The measuring method of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere |
| CN110672658A (en) * | 2019-10-25 | 2020-01-10 | 西安交通大学 | Block porous material heat insulation performance test experiment system and test method suitable for large temperature difference and variable pressure conditions |
| CN111044558A (en) * | 2018-10-12 | 2020-04-21 | 天津大学 | High-temperature probe and preparation method and application thereof |
| CN112179943A (en) * | 2019-07-02 | 2021-01-05 | 天津大学 | Probe for measuring heat conductivity coefficient and preparation method thereof |
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Cited By (18)
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| CN106706701A (en) * | 2016-12-27 | 2017-05-24 | 中国科学院理化技术研究所 | Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method |
| CN107192734A (en) * | 2017-01-22 | 2017-09-22 | 东南大学 | The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity |
| CN108693209A (en) * | 2017-04-07 | 2018-10-23 | 核工业北京地质研究院 | A kind of buffering/backfilling material heat conducting coefficient measurement device and method |
| CN108693209B (en) * | 2017-04-07 | 2021-04-13 | 核工业北京地质研究院 | Device and method for measuring heat conductivity coefficient of buffer/backfill material |
| CN107504924A (en) * | 2017-08-21 | 2017-12-22 | 西安交通大学 | A kind of wide area value thermal contact resistance ternary method of testing and device |
| CN107504924B (en) * | 2017-08-21 | 2019-07-12 | 西安交通大学 | A kind of wide area value thermal contact resistance ternary test method and device |
| CN107884435B (en) * | 2017-10-20 | 2020-12-01 | 中国科学院工程热物理研究所 | Device for measuring heat conductivity coefficient of material under high-pressure gas environment |
| CN107884435A (en) * | 2017-10-20 | 2018-04-06 | 中国科学院工程热物理研究所 | The device of material thermal conductivity is measured under a kind of high pressure gas environment |
| CN108088869A (en) * | 2017-11-30 | 2018-05-29 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of thermal protection system Heat-Insulation Test device |
| CN108562610A (en) * | 2018-03-13 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of method and system of determining thermal conductivity of rocks |
| CN108562610B (en) * | 2018-03-13 | 2021-11-02 | 中国石油天然气股份有限公司 | Method and system for determining rock thermal conductivity |
| CN111044558A (en) * | 2018-10-12 | 2020-04-21 | 天津大学 | High-temperature probe and preparation method and application thereof |
| CN111044558B (en) * | 2018-10-12 | 2020-09-29 | 天津大学 | High-temperature probe and preparation method and application thereof |
| CN109916953A (en) * | 2019-05-06 | 2019-06-21 | 山东众途复合材料有限公司 | The measuring method of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere |
| CN112179943A (en) * | 2019-07-02 | 2021-01-05 | 天津大学 | Probe for measuring heat conductivity coefficient and preparation method thereof |
| CN112179943B (en) * | 2019-07-02 | 2021-12-21 | 天津大学 | Probe for measuring heat conductivity coefficient and preparation method thereof |
| CN110672658A (en) * | 2019-10-25 | 2020-01-10 | 西安交通大学 | Block porous material heat insulation performance test experiment system and test method suitable for large temperature difference and variable pressure conditions |
| CN110672658B (en) * | 2019-10-25 | 2021-05-28 | 西安交通大学 | Block porous material heat insulation performance test experiment system and test method suitable for large temperature difference and variable pressure conditions |
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