CN106896131A - Material interface heat conduction experimental rig and its experimental technique in vacuum environment - Google Patents
Material interface heat conduction experimental rig and its experimental technique in vacuum environment Download PDFInfo
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- CN106896131A CN106896131A CN201510965151.5A CN201510965151A CN106896131A CN 106896131 A CN106896131 A CN 106896131A CN 201510965151 A CN201510965151 A CN 201510965151A CN 106896131 A CN106896131 A CN 106896131A
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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
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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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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides material interface heat conduction experimental rig and its experimental technique in a kind of vacuum environment, and described device includes：Outer chamber；Inner chamber body, in closed and filled with cryogenic liquid, it is placed in outer chamber and forms vacuum interlayer, and also depression forms fluted downwards for the upper surface of the inner chamber body, and the liquid level of cryogenic liquid is higher by bottom portion of groove；At least one heat conduction experimental group, is arranged in the groove, and each heat conduction experimental group includes what is connected successively from the bottom to top：The first material bar, second material bar, heat block and force snesor, the lower end of each the first material bar connects with the bottom surface of the groove, the upper end of each force snesor is connected with load, axially disposed in each described the first material bar and each described second material bar to have thermocouple.The apparatus and method that the present invention is provided, ensure that accurate reading and the stabilization of heat transfer temperature difference of loaded load, material interface thermal conduction resistance in accurate measurement vacuum environment.
Description
Technical field
The present invention relates to low-temperature (low temperature) vessel supporting construction Experimental Study of Heat Transfer apparatus and method, belong to vacuum thermal insulation low temperature appearance
Device technical field.
Background technology
Due to fiberglass high-strength light and the characteristic of low heat conductivity, it is set to have obtained extensively should in low-temperature (low temperature) vessel
With.Stored for cryogenic liquid conventional in the market and shipping container, such as cryogenic liquid tank, tank case,
Low temperature liquid transport vehicle etc., the support for connecting outer tank in container is made by fiberglass.Glass
Glass Steel material can not be welded with metal, therefore, when fiberglass is used as connection and the support member of low-temperature (low temperature) vessel,
Can only in an assembled form be disposed in position using special process.The assembling of this non-solder
Form can produce thermal contact resistance between fiberglass and metal.Because low-temperature (low temperature) vessel inner pressurd vessel is typically using stainless
Steel matter, uses carbon steel material outer container more, and the low-temperature (low temperature) vessel comprising glass steel fastener is carried out in engineering
During thermal design, the thermal contact resistance between wall inside and outside fiberglass and low-temperature (low temperature) vessel is have ignored, cause result of calculation
Larger error.Carry out Accurate Analysis and thermal design in view of to low-temperature (low temperature) vessel, it must be determined that fiberglass with it is interior
The thermal contact resistance of outer container.But boundary is contacted in vacuum environment with stainless steel and carbon steel on fiberglass at present
Face heat conduction data are considerably less, and urgent need is built carries out system in-depth study with targetedly experimental rig, has
Effect solves the problem.
The content of the invention
The purpose of the present invention is that material interface is (particularly during different loaded load in vacuum environment for test
The contact interface of fiberglass and stainless steel and carbon steel) Temperature Distribution, evaluate material (particularly fiberglass with
Stainless steel and carbon steel) directly contact when by different loads heat transfer property, obtain loading different loads when glass
Contact interface thermal conduction resistance between glass steel and stainless steel and carbon steel.
To achieve the above object, the technical solution adopted by the present invention is：
Heat conduction experimental rig in material interface in a kind of vacuum environment, including：
Outer chamber；
Inner chamber body, in closed and filled with cryogenic liquid, it is placed in outer chamber, and between outer chamber
With vacuum interlayer, also depression forms fluted downwards for the upper surface of the inner chamber body, the liquid level of cryogenic liquid
It is higher by bottom portion of groove；
End socket, the top seal with the outer chamber is connected, between the end socket and outer chamber and in groove
Vacuumize；
At least one heat conduction experimental group, is arranged in the groove, and each heat conduction experimental group is included from the bottom to top
Connect successively：The first material bar, second material bar, heat block and force snesor, each first
The lower end for planting material bar connects with the bottom surface of the groove, after the upper end of each force snesor passes the end socket
Load is connected with, in each described the first material bar and each described second material bar vertically
It is disposed with thermocouple.
In preferred technical scheme：The load is loading lever, and one end of the loading lever is fulcrum,
The other end hangs with counterweight, and the upper end of the force snesor is pressed between two ends.
In preferred technical scheme：Reinforcement support is provided between bottom portion of groove and inner chamber body bottom, is also existed
Adiabatic support is provided between inner chamber body bottom and outer chamber bottom.
In preferred technical scheme：The inner chamber body is connected with liquid-feeding tube and delivery pipe, in inner chamber body
Middle filling cryogenic liquid.
In preferred technical scheme：A bellows is also socketed with the upper end of each force snesor, it is described
One end of bellows is tightly connected with the upper end of the force snesor, and the other end is tightly connected with the end socket.
In preferred technical scheme：Heating wires hub and thermocouple wire line concentration are additionally provided with the end socket
Device, the wire of the heat block can keep hermetic passing the envelope by the heating wires hub
Head, the wire of the thermocouple can keep hermetic passing the envelope by the thermocouple wire hub
Head.
In preferred technical scheme：The side of the outer chamber is provided with vacuum orifice and vacuum test mouthful, takes out
Vacuum port connects vacuum pump set, vacuum test mouthful connection vacuum gauge.
In preferred technical scheme：The first material bar and second material bar are respectively by glass steel curved beam
It is made with carbon steel sample.
In preferred technical scheme：The first material bar and second material bar are respectively by stainless steel curved beam
It is made with glass steel curved beam.
To achieve the above object, the technical solution adopted by the present invention also includes：Material connects in a kind of vacuum environment
Interface heat conduction test method is touched, it uses heat conduction experimental rig in material interface in above-mentioned vacuum environment, and
Comprise the following steps：
1) the first material bar, second material bar, heat block are sequentially filled together with force snesor at room temperature
It is made into heat conduction experimental group；
2) heat conduction experimental group is fixed in groove, the lower end of the first material bar is in contact with the bottom surface of groove；
End socket is covered, end socket is tightly connected with outer chamber；Then force snesor and thermocouple are respectively connected to number
According to acquisition system；
3) by interlayer vacuum-pumping, also vacuumized between end socket and outer chamber and in groove；
4) toward filling cryogenic liquid in inner chamber body, and the liquid level of cryogenic liquid is made to be higher by bottom portion of groove；
5) addition load, turn-on data acquisition system, when the first material bar, second material in 10 minutes
When the temperature change of charge bar is respectively less than 0.5 DEG C, start recording data；
6) electric current of heat block is adjusted, changes the temperature of heat block；
7) load is stepped up, the temperature-time curve of the first material bar, second material bar is obtained.
The apparatus and method provided using the present invention, can evaluate glass according to the Temperature Distribution measured in experiment
Glass steel and stainless steel and the thermal contact conductance thermal resistance of carbon steel, are the supporting construction thermal design of vacuum insulation deep cooling container
Computational methods are provided.
Brief description of the drawings
Fig. 1, Fig. 2 are respectively fiberglass and stainless steel and carbon steel contact interface heat conduction experimental rig in vacuum environment
Two different angle sectional views.
Description of reference numerals：1- universal wheels；2- outer chambers；3- inner chamber bodies；The adiabatic supports of 4-；5- strengthens support；
6- vacuum orifices；7- vacuum tests mouthful；8- grooves；The stainless steel curved beams of 9-；10- glass steel curved beams；11- glass
Steel curved beam；12- carbon steel samples；13- thermocouples；14- heat blocks；15- force snesors；16- bellowss；17-
Heating wires hub；18- thermocouple wire hubs；19- is loaded；20- loads lever；21- counterweights；22-
Delivery pipe；23- liquid-feeding tubes；24- end sockets.
Specific embodiment
As shown in Figure 1 and Figure 2, it is heat conduction experimental rig in material interface in the vacuum environment for providing of the invention
A preferred embodiment, it includes：
Outer chamber 2, is supported with universal wheel 1 below, is moved easily it, and its side is provided with vacuum orifice 6
With vacuum test mouthful 7；
Inner chamber body 3, in closed, it is placed in outer chamber 2, and has interlayer, institute between outer chamber 2
State inner chamber body 3 and be connected with liquid-feeding tube 23 and delivery pipe 22, for filling cryogenic liquid in inner chamber body 3；Institute
Also depression forms fluted 8 downwards to state the upper surface of inner chamber body 3, and the liquid level of cryogenic liquid should at least be higher by recessed
The bottom of groove 8；Inside the recessed inner chamber body 3 of the groove 8, enable the stainless steel plate at the bottom surface of groove 8 complete
Complete immersion in cryogenic liquid, so as to ensure that temperature stability；
End socket 24, the top seal with the outer chamber 2 is connected；Outer chamber 2 is connected by with vacuum pump set
On vacuum orifice 6, the interlayer, end socket 24 and groove 8 can be made to obtain higher vacuum, reduce
The outside heat transfer efficiency of inner chamber body 3, reduces the loss of cryogenic liquid；
At least one heat conduction experimental group, is arranged in the groove 8, each heat conduction experimental group include by it is lower extremely
On successively connect：The first material bar, second material bar, heat block 14 (generally heating copper billet)
And force snesor 15, the upper end of each force snesor 15 is connected with load 19 after passing the end socket 24,
As shown in figure 1, two heat conduction experimental groups are provided with, the first material bar, in the heat conduction experimental group in left side
Two kinds of material bars are respectively adopted glass steel curved beam 11 and carbon steel sample 12, and in the heat conduction experimental group on right side the
A kind of material bar, second material bar are respectively adopted stainless steel curved beam 9 and glass steel curved beam 10；No matter using
The material bar which kind of material is made, in each described the first material bar and each second material bar
It is axially disposed to have thermocouple 13；
In the above-described embodiments, the load 19 realized by loading lever 20, as shown in Fig. 2
One end of the loading lever 20 is fulcrum, and the other end hangs with counterweight 21, and the power sensing is pressed between two ends
The upper end of device 15, is arranged such, and when counterweight 21 are increased or decreased, is pressed on force snesor 15
Load 19 also can accordingly proportional change；
Wherein, in order to avoid heat conduction experimental group loading when the bottom of groove 8 is crushed, the bottom of groove 8 with
Between the bottom of inner chamber body 3 corresponding to each heat conduction experimental group position be provided with one strengthen support 5, also including
Adiabatic support 4 is provided between the bottom of cavity 3 and the bottom of outer chamber 2, good firm effect can be played.
Additionally, being also socketed with a bellows 16, the bellows 16 in the upper end of each force snesor 15
One end be tightly connected with the upper end of the force snesor 15, the other end is tightly connected with the end socket 24,
Consequently, it is possible in experimentation, with the change of 19 sizes of load, the length of heat conduction experimental group can also be sent out
Raw corresponding change, but by the corresponding flexible of bellows 16, the length change of heat conduction experimental group is adapted to,
Remain the air-tightness between force snesor 15 and end socket 24.
And, heating wires hub 17 and thermocouple wire hub 18, institute are additionally provided with the end socket 24
The wire for stating heat block 14 can keep hermetic passing the envelope by the heating wires hub 17
First 24, the wire of the thermocouple 13 can keep hermetic wearing by the thermocouple wire hub 18
Go out the end socket 24.
And heat conduction test method in material interface comprises the following steps in the vacuum environment that the present invention is provided：
1) taken out from specimen storage vessel and dry sample, a certain amount of heat conduction is filled in the thermometer hole of sample
, then be put into thermocouple 13 in thermometer hole and fix by silicone grease.And, at room temperature sample (including
A kind of material bar, second material bar), heat block 14 be assembled into heat conduction experimental group together with force snesor 15,
It should be noted that ensureing the axiality of each part in heat conduction experimental group.
2) heat conduction experimental group is fixed in groove 8, covers end socket 24, will sealed by flange and sealing ring
First 24 are tightly connected with outer chamber 2；Vacuum test mouthful 7 connects vacuum gauge, the connection vacuum of vacuum orifice 6
Unit, is then respectively connected to data collecting system by vacuum gauge, force snesor 15 and thermocouple 13.
3) vacuum pump set is started to interlayer vacuum-pumping, the vacuum of interlayer is maintained at 10 under should meeting normal temperature-1Number
The requirement of magnitude.
4) toward filling cryogenic liquid in inner chamber body 3 until discharge mouth spray liquid, i.e. liquid have been filled it up with.If normal temperature
During filling cryogenic liquid, inner chamber body 3 first is purged with cryogenic gas, liquid is added after inner chamber body 3 is cooled down,
Inner chamber body 3 is avoided to be damaged because temperature drastically reduces rapid cold events afterwards.
5) counterweight 21, turn-on data acquisition system, when the first material in 10 minutes are added in lever end
When rod, the temperature change of second material bar are respectively less than 0.5 DEG C, it is believed that heat transfer stabilization, start recording data.
6) electric current of heat block 14 is adjusted, to control the temperature of heat block 14.
7) weight of counterweight 21 is stepped up, the Temperature-time of the first material bar, second material bar is obtained
Curve.
The apparatus and method that the present invention is provided, ensure that accurate reading and the heat transfer temperature difference of loaded load
Stabilization, material interface thermal conduction resistance in accurate measurement vacuum environment.And, the present invention can be used for other
The contact interface heat conduction experiment of metal or nonmetallic materials in vacuum environment.
Claims (10)
1. heat conduction experimental rig in material interface in a kind of vacuum environment, it is characterised in that including：
Outer chamber；
Inner chamber body, in closed and filled with cryogenic liquid, it is placed in outer chamber, and between outer chamber
With vacuum interlayer, also depression forms fluted downwards for the upper surface of the inner chamber body, the liquid level of cryogenic liquid
It is higher by bottom portion of groove；
End socket, the top seal with the outer chamber is connected, between the end socket and outer chamber and in groove
Vacuumize；
At least one heat conduction experimental group, is arranged in the groove, and each heat conduction experimental group is included from the bottom to top
Connect successively：The first material bar, second material bar, heat block and force snesor, each first
The lower end for planting material bar connects with the bottom surface of the groove, after the upper end of each force snesor passes the end socket
Load is connected with, in each described the first material bar and each described second material bar vertically
It is disposed with thermocouple.
2. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：The load is loading lever, and one end of the loading lever is fulcrum, and the other end hangs with counterweight,
The upper end of the force snesor is pressed between two ends.
3. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：Reinforcement support is provided between bottom portion of groove and inner chamber body bottom, also in inner chamber body bottom and outer chamber
Adiabatic support is provided between bottom.
4. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：The inner chamber body is connected with liquid-feeding tube and delivery pipe, for filling cryogenic liquid in inner chamber body.
5. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：Also be socketed with a bellows in the upper end of each force snesor, one end of the bellows with it is described
The upper end of force snesor is tightly connected, and the other end is tightly connected with the end socket.
6. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：It is additionally provided with heating wires hub and thermocouple wire hub on the end socket, the heat block is led
Line can be kept hermetic passing the end socket by the heating wires hub, and the thermocouple is led
Line can keep hermetic passing the end socket by the thermocouple wire hub.
7. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：The side of the outer chamber is provided with vacuum orifice and vacuum test mouthful, and vacuum orifice connects vacuum pump set,
Vacuum test mouthful connection vacuum gauge.
8. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：The first material bar is made up of glass steel curved beam and carbon steel sample respectively with second material bar.
9. material interface heat conduction experimental rig, its feature in vacuum environment according to claim 1
It is：The first material bar is made up of stainless steel curved beam with glass steel curved beam respectively with second material bar.
10. heat conduction test method in material interface in a kind of vacuum environment, it is characterised in that it is using such as
Heat conduction experimental rig in material interface in vacuum environment any one of claim 1-9, and including such as
Lower step：
1) the first material bar, second material bar, heat block are sequentially filled together with force snesor at room temperature
It is made into heat conduction experimental group；
2) heat conduction experimental group is fixed in groove, the lower end of the first material bar is in contact with the bottom surface of groove；
End socket is covered, end socket is tightly connected with outer chamber；Then force snesor and thermocouple are respectively connected to number
According to acquisition system；
3) by interlayer vacuum-pumping, also vacuumized between end socket and outer chamber and in groove；
4) toward filling cryogenic liquid in inner chamber body, and the liquid level of cryogenic liquid is made to be higher by bottom portion of groove；
5) addition load, turn-on data acquisition system, when the first material bar, second material in 10 minutes
When the temperature change of charge bar is respectively less than 0.5 DEG C, start recording data；
6) electric current of heat block is adjusted, changes the temperature of heat block；
7) load is stepped up, the temperature-time curve of the first material bar, second material bar is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510965151.5A CN106896131A (en) | 2015-12-21 | 2015-12-21 | Material interface heat conduction experimental rig and its experimental technique in vacuum environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510965151.5A CN106896131A (en) | 2015-12-21 | 2015-12-21 | Material interface heat conduction experimental rig and its experimental technique in vacuum environment |
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| CN106896131A true CN106896131A (en) | 2017-06-27 |
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| CN201510965151.5A Pending CN106896131A (en) | 2015-12-21 | 2015-12-21 | Material interface heat conduction experimental rig and its experimental technique in vacuum environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020252984A1 (en) * | 2019-06-20 | 2020-12-24 | 浙江大学 | Material performance testing system under suspension multi-field coupling action in supergravity environment |
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|---|---|---|---|---|
| US6824306B1 (en) * | 2002-12-11 | 2004-11-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermal insulation testing method and apparatus |
| CN102141529A (en) * | 2010-12-30 | 2011-08-03 | 西安交通大学 | Vacuum contact thermal conduction measurement device of fixed junction surface |
| CN201926635U (en) * | 2010-12-20 | 2011-08-10 | 西安交通大学 | Joint surface thermal contact resistance measuring device |
| CN102798645A (en) * | 2012-08-07 | 2012-11-28 | 南京理工大学 | Heat conduction coefficient and contact thermal resistance testing device |
-
2015
- 2015-12-21 CN CN201510965151.5A patent/CN106896131A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6824306B1 (en) * | 2002-12-11 | 2004-11-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermal insulation testing method and apparatus |
| CN201926635U (en) * | 2010-12-20 | 2011-08-10 | 西安交通大学 | Joint surface thermal contact resistance measuring device |
| CN102141529A (en) * | 2010-12-30 | 2011-08-03 | 西安交通大学 | Vacuum contact thermal conduction measurement device of fixed junction surface |
| CN102798645A (en) * | 2012-08-07 | 2012-11-28 | 南京理工大学 | Heat conduction coefficient and contact thermal resistance testing device |
Non-Patent Citations (1)
| Title |
|---|
| CHANG DING,ET AL.: "Experimental investigation of thermal contact conductance across GFRP–GFRP joint", 《HEAT MASS TRANSFER》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020252984A1 (en) * | 2019-06-20 | 2020-12-24 | 浙江大学 | Material performance testing system under suspension multi-field coupling action in supergravity environment |
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Application publication date: 20170627 |