CN105352993A - Performance testing apparatus and method for flat-plate LHP capillary core - Google Patents
Performance testing apparatus and method for flat-plate LHP capillary core Download PDFInfo
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- CN105352993A CN105352993A CN201510821943.5A CN201510821943A CN105352993A CN 105352993 A CN105352993 A CN 105352993A CN 201510821943 A CN201510821943 A CN 201510821943A CN 105352993 A CN105352993 A CN 105352993A
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- G—PHYSICS
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- 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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Abstract
The invention provides a performance testing apparatus and method for a flat-plate LHP capillary core. An evaporator of the apparatus comprises an evaporator main shell, an evaporator cover plate, a main sealing ring, a secondary sealing ring, a to-be-tested capillary core and a fastener. The method comprises the following steps: bonding of a heater with a measuring point; testing of heat transfer capability; and testing of inverse gravity capability. The performance testing apparatus provided by the invention can simulate an ideal combination state and maximally reduce influence of other non-relevant factors on result, is repeatedly usable, and adaptive to to-be-tested capillary cores of different sizes by changing the sizes of the main and secondary sealing rings, so test cost is decreased.
Description
Technical field
The present invention relates to performance testing device, particularly, relate to flat LHP capillary wick performance testing device and method, especially a kind of satellite flat LHP capillary wick performance testing device and method.
Background technology
LHP is a kind of desirable heat transfer element, has strong, the resistance to high heat flux of heat-transfer capability, reversible gravity runs, can the feature such as flexible layout, has important application in space flight thermal control field.Capillary wick performance is the core component being related to LHP, its performance is to LHP performance decisive role, method of testing major part at present for capillary wick performance adopts its water suction speed of observation, but the method directly cannot reflect that capillary wick performance is good and bad, test result is easily by multifactor impacts such as air.
Dull and stereotyped LHP capillary wick performance testing device forms primarily of condenser, pipeline, evaporator and internal work medium.Condenser connects evaporator by pipeline.Condenser plays the effect to running medium condenses.Pipeline portions comprises and fills a mouthful pipeline for the follow-up medium suppressing, vacuumize and fill medium, and overall pipeline can select the pipeline of different length according to the performance of different capillary wick, to adapt to follow-up inverse gravity horizontal test needs.Prior art also exists unreasonable structure, and measuring accuracy has much room for improvement.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of flat LHP capillary wick performance testing device and method.
According to one provided by the invention flat LHP capillary wick performance testing device, comprise evaporator, pipeline and condenser, evaporator comprises: evaporator main casing, evaporator cover plate, main seal ring, secondary sealing ring, capillary wick to be measured and securing member;
The underrun securing member of evaporator cover plate fits tightly the end face connecting evaporator main casing, forms evaporator internal cavity;
In described internal cavity, main seal ring is packed between evaporator main casing medial surface and capillary wick side to be measured, evaporator main casing medial surface is connected with capillary wick side seal to be measured by main seal ring, secondary sealing ring is packed between capillary wick end face to be measured and evaporator cover plate bottom surface, and capillary wick end face to be measured connects evaporator cover plate bottom surface by time seal ring seal.
Preferably, by time sealing ring, pressure is applied to capillary wick to be measured at evaporator cover plate, the bottom surface of capillary wick to be measured is fitted tightly the bottom surface inside evaporator main casing.
Preferably, evaporator cover plate bottom surface is provided with groove, and this groove forms liquid storage cylinder, and evaporator main casing inside bottom surface is provided with an annular groove or multiple concentric ring recesses, and this annular groove forms steam free air space.
Preferably, adopt acetone or alcohol as condensation actuating medium.
Preferably, evaporator cover plate is provided with through hole, and through hole runs through end face and the bottom surface of evaporator cover plate; The aperture, upper end of through hole connects condenser by pipeline, and the gap immediately below the aperture, lower end of through hole and this aperture, lower end between capillary wick end face to be measured is looped around in time sealing ring.
According to one provided by the invention flat LHP capillary wick performance test methods, utilize above-mentioned flat LHP capillary wick performance testing device, comprise the steps:
Step S1: paste well heater and measuring point step
Pasting diameter in evaporator main casing outside surface face is the electric heating sheets of 40 ~ 45mm, at evaporator, pipeline and condenser surface position sticking temperature measuring point;
Step S2: test heat-transfer capability step
The liquid storage cylinder of evaporator is adjusted to identical or substantially identical height with the condenser pipe of condenser, and evaporator is done heat insulation process; Electric heating sheets is powered up and records the change of each temperature point institute collecting temperature, there is sudden temperature rise to the temperature of evaporator surface temperature point collection in the heating power progressively increasing electric heating sheets, when sudden temperature rise phenomenon occurs, the heating power of electric heating sheets is as the maximum heat transport capability corresponding under horizontality of capillary wick to be measured;
Described sudden temperature rise refers to: heating rate >=1 of temperature DEG C/s.
Preferably, also comprise the steps:
Step S3: the inverse gravity ability step of test
Electric heating sheets is applied to the heating power of 2 ~ 5W, after described flat LHP capillary wick performance testing device operates steadily, progressively promote evaporator height and sudden temperature rise phenomenon appears in the evaporator surface temperature point that is changed to recording each temperature point collecting temperature, the most regicide gravimetric height that when this sudden temperature rise phenomenon being occurred, the rising height of evaporator can realize as capillary wick to be measured.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention adopts the structure simulating dull and stereotyped LHP, by the rational innovative structure design of evaporator, can guarantee test process approximate slab LHP operational process, also reduce the impact on test result such as technique assembling, structural member dimensional accuracy simultaneously.
2, the design feature of flat LHP capillary wick performance testing device provided by the invention is one-piece construction and flat LHP similar, the factor such as assembly technology, structure housing dimensional accuracy that can reduce to the full extent is on the impact of test result, require low to test specimen, the device of development can be applied repeatedly.
3, the present invention can simulate ideal assembled state, reduces other irrelevant factor most possibly to the impact of test result.The flat LHP capillary wick performance testing device of the present invention's development can be applied repeatedly, can be adapted to the capillary wick to be measured of different size by the size changing primary and secondary sealing ring, reduces testing cost.
4, the present invention can reduce the factor such as assembly technology, structure housing dimensional accuracy to the full extent on the impact of test result, and require low to test specimen, the device of development can be applied repeatedly; The annular channel of evaporator evaporation side design can guarantee that the steam produced in operational process can be arranged loose fast on the one hand, and what ensure that heat on the other hand divides equally distribution.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is flat LHP capillary wick performance testing device entirety composition schematic diagram provided by the invention;
Fig. 2 is the structural representation of evaporator in the present invention;
Fig. 3 is the structural representation of evaporator cover plate;
Fig. 4, Fig. 5 are the structural representation of evaporator main casing.
In figure:
1-evaporator
2-condenser
3-condenser pipe
4-medium fills mouth
5-evaporator main casing
6-primary seal circle
7-O-ring seal
8-capillary wick to be measured
9-evaporator cover plate
10-securing member
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some changes and improvements can also be made.These all belong to protection scope of the present invention.
According to one provided by the invention flat LHP capillary wick performance testing device, comprise evaporator, pipeline and condenser, evaporator comprises: evaporator main casing, evaporator cover plate, main seal ring, secondary sealing ring, capillary wick to be measured and securing member;
The underrun securing member of evaporator cover plate fits tightly the end face connecting evaporator main casing, forms evaporator internal cavity;
In described internal cavity, main seal ring is packed between evaporator main casing medial surface and capillary wick side to be measured, evaporator main casing medial surface is connected with capillary wick side seal to be measured by main seal ring, secondary sealing ring is packed between capillary wick end face to be measured and evaporator cover plate bottom surface, and capillary wick end face to be measured connects evaporator cover plate bottom surface by time seal ring seal.
By time sealing ring, pressure is applied to capillary wick to be measured at evaporator cover plate, the bottom surface of capillary wick to be measured is fitted tightly the bottom surface inside evaporator main casing.
Evaporator cover plate bottom surface is provided with groove, and this groove forms liquid storage cylinder, and evaporator main casing inside bottom surface is provided with an annular groove or multiple concentric ring recesses, and this annular groove forms steam free air space.
Described flat LHP capillary wick performance testing device adopts acetone or alcohol as condensation actuating medium.
Evaporator cover plate is provided with through hole, and through hole runs through end face and the bottom surface of evaporator cover plate; The aperture, upper end of through hole connects condenser by pipeline, and the gap immediately below the aperture, lower end of through hole and this aperture, lower end between capillary wick end face to be measured is looped around in time sealing ring.
The method for making of described flat LHP capillary wick performance testing device comprises following operation:
Operation 1: element is processed
According to each element of concrete figure paper conversion, sealing ring can have more capillary wick dimensioned to be measured, treats size to be used close with reality.Sealing ring adopts thiokol processing, and capillary wick is selection material according to actual needs, and other parts all adopt 304 stainless steels.Length of pipe has more capillary wick capillary draft discreet value and selects, and is generally 1m ~ 5m.
Operation 2: assembling
The version proposed according to the present invention is assembled according to accompanying drawing 1 and accompanying drawing 2, and wherein weld all adopts laser bonding.
Operation 3: Leakage Test
Adopt helium mass spectrometer leak detector butt welded seam and connecting sewing place to carry out leak rate detection, institute has a leak rate should not be greater than 10
-8pa.m3/s.The weld seam exceeded standard for leak rate needs repair welding, and the connecting sewing exceeded standard for leak rate needs ressemble or change sealing ring.
Operation 4: bulge test
Dull and stereotyped LHP capillary wick performance testing device medium filled mouth and suppress equipment connection, alignment is suppressed, and withstand voltage is not less than 0.3MPa.
Operation 5: fill and soldering and sealing
Proving installation medium is filled mouth be connected with special filling equipment, alignment inside vacuumizes, and reaches 10 in vacuum tightness
-3continue after Pa to vacuumize 1.5h ~ 2h, then pumped vacuum systems closed and start medium charging system, be filled with that medium volume should account for total measurement (volume) 30% ~ 45%.Adopt cold welding tong medium is filled mouthful cold welding and takes off filling station after filling, adopt argon arc welding will fill a mouthful soldering and sealing subsequently.
Evaporator in the present invention, under the effect of securing member, makes evaporator shell inside define sealed environment by the sealing function of main seal ring.Be out of shape under the pressure that main seal ring produces at securing member, define sealing at evaporator main casing medial surface and capillary wick side to be measured, also reduce the heat radiation of housing to capillary wick side simultaneously.Secondary sealing ring is positioned on the upside of capillary wick end face to be measured, capillary wick can be fitted tightly in evaporator main casing inside bottom surface under the pressure effect of evaporator cover plate.Can be adapted to the capillary wick test specimen of different-diameter and thickness by the size changing primary and secondary sealing ring, the spill design in the middle of evaporator cover plate mainly defines reservoir.Evaporator main casing inside bottom surface devises annular groove, defines steam free air space.Dull and stereotyped LHP capillary wick performance testing device provided by the invention can adopt acetone or alcohol as actuating medium.
According to one provided by the invention flat LHP capillary wick performance test methods, utilize above-mentioned flat LHP capillary wick performance testing device, comprise the steps:
Step S1: paste well heater and measuring point step
Pasting diameter in evaporator main casing outside surface face is the electric heating sheets of 40 ~ 45mm, at evaporator, pipeline and condenser surface position sticking temperature measuring point;
Step S2: test heat-transfer capability step
The liquid storage cylinder of evaporator is adjusted to identical or substantially identical height with the condenser pipe of condenser, and evaporator is done heat insulation process; Powering up electric heating sheets and record the change of each temperature point institute collecting temperature, there is sudden temperature rise phenomenon to the temperature of evaporator surface temperature point collection in the heating power progressively increasing electric heating sheets; When this sudden temperature rise phenomenon being occurred, the heating power of electric heating sheets is as the maximum heat transport capability corresponding under horizontality of capillary wick to be measured;
Step S3: the inverse gravity ability step of test
Electric heating sheets is applied to the heating power of 2 ~ 5W, after described flat LHP capillary wick performance testing device operates steadily, progressively promote evaporator height and sudden temperature rise phenomenon appears in the evaporator surface temperature point that is changed to recording each temperature point collecting temperature, the most regicide gravimetric height that when this sudden temperature rise phenomenon being occurred, the rising height of evaporator can realize as capillary wick to be measured.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise, and this does not affect flesh and blood of the present invention.When not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Claims (7)
1. a flat LHP capillary wick performance testing device, comprise evaporator, pipeline and condenser, it is characterized in that, evaporator comprises: evaporator main casing, evaporator cover plate, main seal ring, secondary sealing ring, capillary wick to be measured and securing member;
The underrun securing member of evaporator cover plate fits tightly the end face connecting evaporator main casing, forms evaporator internal cavity;
In described internal cavity, main seal ring is packed between evaporator main casing medial surface and capillary wick side to be measured, evaporator main casing medial surface is connected with capillary wick side seal to be measured by main seal ring, secondary sealing ring is packed between capillary wick end face to be measured and evaporator cover plate bottom surface, and capillary wick end face to be measured connects evaporator cover plate bottom surface by time seal ring seal.
2. flat LHP capillary wick performance testing device according to claim 1, is characterized in that, applies pressure, the bottom surface of capillary wick to be measured is fitted tightly the bottom surface inside evaporator main casing at evaporator cover plate by time sealing ring to capillary wick to be measured.
3. flat LHP capillary wick performance testing device according to claim 1, it is characterized in that, evaporator cover plate bottom surface is provided with groove, this groove forms liquid storage cylinder, evaporator main casing inside bottom surface is provided with an annular groove or multiple concentric ring recesses, and this annular groove forms steam free air space.
4. flat LHP capillary wick performance testing device according to claim 1, is characterized in that, adopts acetone or alcohol as condensation actuating medium.
5. flat LHP capillary wick performance testing device according to claim 1, it is characterized in that, evaporator cover plate is provided with through hole, and through hole runs through end face and the bottom surface of evaporator cover plate; The aperture, upper end of through hole connects condenser by pipeline, and the gap immediately below the aperture, lower end of through hole and this aperture, lower end between capillary wick end face to be measured is looped around in time sealing ring.
6. a flat LHP capillary wick performance test methods, is characterized in that, utilizes the flat LHP capillary wick performance testing device described in claim 1, comprises the steps:
Step S1: paste well heater and measuring point step
Pasting diameter in evaporator main casing outside surface face is the electric heating sheets of 40 ~ 45mm, at evaporator, pipeline and condenser surface position sticking temperature measuring point;
Step S2: test heat-transfer capability step
The liquid storage cylinder of evaporator is adjusted to identical or substantially identical height with the condenser pipe of condenser, and evaporator is done heat insulation process; Electric heating sheets is powered up and records the change of each temperature point institute collecting temperature, there is sudden temperature rise to the temperature of evaporator surface temperature point collection in the heating power progressively increasing electric heating sheets, when sudden temperature rise phenomenon occurs, the heating power of electric heating sheets is as the maximum heat transport capability corresponding under horizontality of capillary wick to be measured;
Described sudden temperature rise refers to: heating rate >=1 of temperature DEG C/s.
7. flat LHP capillary wick performance test methods according to claim 6, is characterized in that, also comprise the steps:
Step S3: the inverse gravity ability step of test
Electric heating sheets is applied to the heating power of 2 ~ 5W, after described flat LHP capillary wick performance testing device operates steadily, progressively promote evaporator height and sudden temperature rise phenomenon appears in the evaporator surface temperature point that is changed to recording each temperature point collecting temperature, the most regicide gravimetric height that when this sudden temperature rise phenomenon being occurred, the rising height of evaporator can realize as capillary wick to be measured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510821943.5A CN105352993A (en) | 2015-11-23 | 2015-11-23 | Performance testing apparatus and method for flat-plate LHP capillary core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510821943.5A CN105352993A (en) | 2015-11-23 | 2015-11-23 | Performance testing apparatus and method for flat-plate LHP capillary core |
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| CN105352993A true CN105352993A (en) | 2016-02-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342253A (en) * | 2018-11-29 | 2019-02-15 | 安徽工业大学 | A kind of loop heat pipe capillary core performance testing device and its test method |
| CN110146264A (en) * | 2019-05-15 | 2019-08-20 | 桂林电子科技大学 | A kind of capillary wick overload test device and method |
| CN110608627A (en) * | 2018-02-06 | 2019-12-24 | 山东大学 | Method for controlling capillary pressure by using mobile phone APP |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608627A (en) * | 2018-02-06 | 2019-12-24 | 山东大学 | Method for controlling capillary pressure by using mobile phone APP |
| CN109342253A (en) * | 2018-11-29 | 2019-02-15 | 安徽工业大学 | A kind of loop heat pipe capillary core performance testing device and its test method |
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| CN110146264A (en) * | 2019-05-15 | 2019-08-20 | 桂林电子科技大学 | A kind of capillary wick overload test device and method |
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