CN106608378A - Carbon fiber tool heating cage for vacuum thermal test - Google Patents
Carbon fiber tool heating cage for vacuum thermal test Download PDFInfo
- Publication number
- CN106608378A CN106608378A CN201610301207.1A CN201610301207A CN106608378A CN 106608378 A CN106608378 A CN 106608378A CN 201610301207 A CN201610301207 A CN 201610301207A CN 106608378 A CN106608378 A CN 106608378A
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- carbon fiber
- heating
- cage
- connecting rods
- connecting rod
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 93
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 78
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 78
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000012360 testing method Methods 0.000 title claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- 239000004411 aluminium Substances 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 9
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000009954 braiding Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000005855 radiation Effects 0.000 abstract description 12
- 238000005485 electric heating Methods 0.000 abstract description 2
- 238000009941 weaving Methods 0.000 abstract description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 229910001120 nichrome Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002305 electric material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Resistance Heating (AREA)
Abstract
The invention discloses a carbon fiber tool heating cage for a vacuum thermal test. The cage comprises two connecting rods which are arranged vertically in parallel; aluminium profiles perpendicular to the connecting rods penetrate through upper and lower ends of the connecting rods; aluminium profiles are further vertically arranged on outer sides of the connecting rods; the aluminium profiles are fixed through right-angled joints to form an aluminium framework; a plurality of specially-shaped pieces are arranged on the two connecting rods; the specially-shaped pieces and the surfaces of the connecting rods form bent space; a carbon fiber heating belt with the starting end connected at a connection port is arranged in a parallel and round manner by winding in the bent space of the specially-shaped pieces, the end point is connected onto the other connection port, a test cable is connected with the connection port, and a test current loop is formed; and the carbon fiber heating belt is made of 3K carbon fiber yarn through weaving. The cage is simple in structure and convenient to assemble, is greatly lighter than a nickel-chromium alloy heating cage, has the better electric heating infrared radiation efficiency, can meet heating requirements of various types and various sizes and has the very high universality.
Description
Technical field
The present invention relates to a kind of frock for spacecraft thermal vacuum test heats cage, this device is applied to spacecraft ground
Face thermal vacuum test.
Background technology
Heating cage is the crucial frock in spacecraft space environment simulated test, and Main Function is analog satellite in space ring
High temperature and low temperature change in border, to realize the evaluation to satellite overall permanence.
Traditional infrared heating cage using the pitch-dark coating of the high hemispherical emissivity of nichrome metal tape coated by special as plus
Hot body, due to linear expansion, it is necessary to the strip lengths change under spring is mounted on skeleton to offset heat test alternating hot and cold,
Therefore, this kind of heating cage has manual work amount greatly, the low problem of efficiency.
Spacecraft thermal vacuum test needs generation infra-red radiation to carry out simulation space environment, there is many generation infra-red radiations at present
Device, such as ceramic infrared heater, quartz heating-pipe, halogen heating pipe, including existing heating cage coats pitch-dark metal
Band, these can be considered used in vacuum thermal test.
Carbon fiber is a kind of flexible carbon material of high emissivity, with high specific strength, high ratio modulus, electric radiation efficiency high
Deng prominent electric heating property advantage, civil heating industry, such as floor heating, super bath, electric heater have been widely used in it.In vacuum
Heat test application, the applicability of carbon fibre material is optimal, this is because：
1 thermal coefficient of expansion in high and low temperature environment is almost nil, and this can adapt to alternating hot and cold in vacuum environment just
Condition, without the need for mounting spring, simplify assembling process.
2 can be directly prepared into band strip, met heating cage tape it is flexible can cutting easily assembling needs, therefore compare halogen
Plain heating tube etc. cannot free surface jet situation, with greatly assembling advantage.
3 electric conversion efficiencies are high, and far infrared radiation efficiency high is up to 90%.
4 again due to the nearly black body characteristics of carbon fiber, and spectral emissivity can avoid spraying pitch-dark, section more than 0.9, during test
Great amount of cost is saved.
In sum, using carbon fibre material as the radiant heating body for heating cage, no matter from assembling convenience, heat radiation
The adaptability aspect of efficiency raising, reduces cost and Complex Temperature environment, all with very big application potential.But, how to adopt
Suitable heating cage is supported with carbon fibre material, in being especially applicable to spacecraft ground vacuum thermal test, for this area
It is the technical problem for being badly in need of solving.
The content of the invention
It is an object of the invention to provide a kind of fitting device for spacecraft thermal vacuum test, the efficiency of heating surface is high and steady
Fixed, simple structure, easy making process installs light, removes pitch-dark spraying link from, and the availability of raw material is good with economy, energy
Perfection substitutes presently used nickel chromium triangle heating cage.
To achieve these goals, present invention employs following technical scheme：
Carbon fiber vacuum thermal test frock heats cage, including opposing parallel two connecting rods for erectting setting, two connecting rods
Upper and lower side is equipped with respectively the aluminium section bar vertical with connecting rod, and the two connecting rods outside of setting is also erect respectively and arranges aluminium section bar,
Aluminium section bar between connecting rod is fixed to form aluminum skeleton by angle coupling respectively with the aluminium section bar in outside, to fix two connections
Bar, is respectively arranged with some shaped pieces in two connecting rods, a connecting rod top arranges Wiring port, and another connecting rod bottom is same
Wiring port is set, and shaped piece forms bending space with connecting rod surface, and the carbon fiber that initiating terminal is connected on Wiring port adds
The torrid zone is connected on another Wiring port by being wound on the parallel round arrangement in the bending space of shaped piece and terminal, is equipped with electricity
Source, test cable is connected with Wiring port, forms test current loop, wherein, carbon fiber heating belt by 3K carbon fiber wire
Braiding is formed, and is multidirectional ribbon, and monfil forms self-locking obvolvent structure.
Wherein, the shaped piece in connecting rod is in hook-shaped, carbon fiber heating belt is directly mounted and is vertically connected with bar, is protected
The wide face of card heating tape with skeleton plane in the same direction, forms loop, and Wiring port is reserved at the two ends in loop, and overall heating tape is in parallel
It is evenly distributed on a plane.
Wherein, heating tape is carbon fibre material, by the high-temperature shaping glue of content 5% and being combined for heating wire, and is carried out
High-temperature heat treatment, the temperature change for making carbon fiber heating belt to adapt to -180 DEG C to+200 DEG C can accomplish arbitrarily curved again
Roll over and do not fracture.
Wherein, skeleton is square aluminum pipe, and square aluminum pipe is inserted into angle coupling, and joint punching is fastened with screw.
Wherein, connecting rod be polytetrafluoroethylene (PTFE) sheet material, strip.
Wherein, connecting rod is affixed directly to the both sides up and down of aluminium skeleton, parallel distribution by screw.
Wherein, Wiring port is crimped using copper sheet, is worn on screw and copper sheet.
Wherein, carbon fiber heating belt employs multidirectional tape-like woven structure, and section is in flat strip shaped, and per meter of resistance value is 2
Europe is between 8 Europe.
Wherein, the spectral emissivity of carbon fiber heating belt is more than 0.91.
Wherein, the filament diameter of carbon fiber is in 5-7 microns.
It is of the invention compared with original frock, either thermo electric material, assembly technology, framework material or connected mode,
Entirely different with presently used nichrome heating cage, the electric radiation efficiency of carbon fiber is higher than nichrome, and Jing experiments are surveyed
It is scheduled on nichrome alloy belt own temperature under the electric current of 3.5A and is not higher than 280 DEG C, and carbon fiber tape is then far above 300 DEG C.In vacuum
(air pressure is less than 10 with high and low temperature environment-3Handkerchief, temperature is in -180 DEG C to+200 DEG C changes) power on/off, carbon fiber heating belt do not have
Matter is damaged.Either it is greatly reduced in human cost or material resources cost, while with high electrothermal red infrared radiation efficiency.
Description of the drawings
Fig. 1 is the flow sheet that the carbon fiber vacuum thermal test frock of the present invention heats carbon fiber heating belt in cage.
Fig. 2 is the spectral emissivity test that the carbon fiber vacuum thermal test frock of the present invention heats carbon fiber heating belt in cage
Curve map.
Fig. 3 is that the carbon fiber vacuum thermal test frock of the present invention heats carbon fiber heating belt load current and surface temperature in cage
Degree variation relation figure.
Fig. 4 is the structural representation that the carbon fiber vacuum thermal test frock of the present invention heats cage.
Wherein, 1, skeleton angle coupling；2nd, connecting rod；3rd, Wiring port (crimping copper sheet and terminal screw)；4th, it is parallel past
Return the carbon fiber heating belt of arrangement；5th, aluminum skeleton；6th, the shaped piece in connecting rod.
Carbon fiber vacuum thermal test frock heating cage electrical current and time plot (the right side longitudinal axis) when Fig. 5 is experiment
Time-temperature curve figure when Fig. 6 is experiment on three heating tapes of carbon fiber vacuum thermal test frock heating cage
Fig. 7 is arranged on the time-temperature curve figure of four heat-flow meters on aluminium sheet.
Specific embodiment
Introduced below is the specific embodiment as content of the present invention, below by specific embodiment to this
The content of invention is further illustrated.Certainly, it is only the not Tongfang of the example present invention to describe following detailed description
The content in face, and should not be construed as limiting the invention scope.
The design process of carbon fiber heating belt is as follows in the present invention：
1. the exterior design of carbon fiber heating belt
Ultrafine carbon fiber monofilament of the filament diameter of carbon fiber in 5-7 microns, finished product carbon fiber typically in pencil set,
Carbon fiber multiply tow band shape knitting skill is present invention employs, fibre bundle is carried out by specific carbon fiber braiding apparatus
Multidirectional ribbon, self-locking obvolvent structure, close and firm between fibre bundle are knitted to form between monfil by multidirectional
Contact, it is to avoid the loose condition (of surface) of maximum probability between monofilament, has been effectively ensured the structural stability of carbon fibre tow, while passing through
The structure design of this multiply ribbon can to greatest extent ensure its resistance in the longitudinal direction while Stability Analysis of Structures
Stable and uniform.
2. the resistors match design of carbon fiber heating belt
The multiply braid over braid appearance structure design that the present invention takes, again can be by single while overall cohesive force is ensured
Stock tow amount, plying number are adjusted flexibly, and the overall resistance of flexible design braid over braid reaches the mesh that resistive performance is adjusted flexibly
, the wherein resistance Adjusted Option of multiply weaving and carbon fiber flexible braid over braid, as shown in table 1.From table 1, pass through
The braiding scheme of different K numbers carbon fibers preferably, can be adjusted flexibly the resistance per unit length value of carbon fiber flexible heating tape, this
Bright to have chosen two kinds of braiding schemes, adjustment single-stranded fiber amount (K numbers) can be designed that 7 kinds of different unit resistances with number of braided strand
Index, final resistance per unit length value can be adjusted in 2 ohm/meters between 8 ohm/meters, if desired in unit length more
Little resistance value, may also be employed carbon fiber multiply braid over braid and uses mode, such conceptual design to meet heating cage completely
Different radiant power design requirements.
The resistance per unit length design of the difference K numbers of table 1 and number of braided strand
3. the mechanical characteristic design of carbon fiber heating belt
According to heating cage matching requirements, need heating tape to possess certain toughness and elasticity, to adapt to different temperatures under
Change in size；Simultaneously the heating tape needs the bending and distortion for resisting corner location in assembling process, it is therefore desirable in heating
Belt surface carries out certain high-temperature shaping and processes, and ensures under conditions of carbon fibre tow flexible foundation, to give its certain to reach
Mechanics rigidity and toughness.Have selected two kinds of different high-temperature shaping glue of toughness, select coating 1%, 2%, 3%, 4%, 5%,
The carbon fibre tow of 10% 6 kind of different sizing gluing agent content carries out high-temperature process, forms carbon fiber composite heating carry sample,
By heat-treating profiled composite heating, the test with mechanical characteristic finds, the change of adhesive species and content is for heating tape
Toughness and rigidity have important impact, as shown in table 2.
The mechanical characteristic that the setting agent species of table 2 weaves flexible heater band on carbon fiber multiply with concentration affects contrast
From the Data Comparison of table 2, the type of shaping glue has considerable influence to the rigidity of carbon fiber heating belt, and it is fixed to be combined
Adjustment of the type glue 1 with concentration from low to high integrally occurs in that lousiness, fracture of wire problem, and this is unfavorable for the assembling of heating tape
's.And composite setting glue 2 has larger sensitiveness with the change of coating concentration, low concentration shaping glue first is carried for rigid
High DeGrain, and high concentration composite setting glue is adopted, after especially concentration is more than 5%, the rigidity of heating tape is significantly
Degree is improved, and easily occurs the even overall breakage phenomenon of fracture of wire, lousiness during bending repeatedly.Therefore in preferred version repeatedly
Afterwards, the present invention selects the composite setting glue 2 (resistance wire combined high temperature adhesive) of 3-4% moderate concentrations as composite setting gluing
Agent carries out high-temperature shaping to it, to ensure the mechanical property that its overall flexibility has both with rigidity.
According to vacuum thermal test for the design of heating tape profile, resistance characteristic and mechanical characteristic, using special carbon
Fiber multiply braiding apparatus and high-temperature shaping equipment, realize the continuous prodution to carbon fiber heating belt.Its main production process
As shown in Figure 2.
The test process of carbon fiber heating belt is as follows in the present invention：
1 spectral emissivity is tested
In view of heating cage needs to simulate the heat exchanging process under vacuum environment, and it is main with heat radiation work in vacuum environment
For main heat transfer type.For this purpose, having carried out the vacuum environment spectral emissivity test of heating tape, its test wave band is in 2500-
In the range of 15000nm, test result is as shown in Figure 3.Visible by test result analysis, carbon fiber multiply braid over braid is in 8000nm
The monochromatic emissivity of band above scope is substantially more than 0.9, and the monochromatic emissivity in the range of 8000-15000nm is also protected
Hold more than 0.85, minimum monochromatic emissivity is also up to 0.84.It is reachable by calculating its total emissivity in Validity Test wave band
To 0.91.Therefore there is high infrared radiation efficiency under the conditions of vacuum test using the carbon fiber heating belt of the present invention, it is red
External radiation heating effect can be fully achieved heat test use requirement.
2 electric performance tests
Heating chargeding performance is one of heating cage main performance index, for this purpose, the present invention has carried out load current change bar
Test is investigated in the change of the radiant heating belt surface temperature under part.Test result is as shown in Figure 4.It can be seen that with
Carbon fiber multiply braid over braid loading current is raised, and its surface temperature is also presented linear rising trend, when loading current up to 4 amperes with
When upper, surface temperature can be more than 300 DEG C, and this explanation carbon fiber multiply braid over braid has higher thermal efficiency, and it is right effectively to realize
The heat exchange of space environment.
The Key Performance Indicator of carbon fiber heating belt in the present invention：
The carbon fiber multiply of table 3 braiding radiant heating band Key Performance Indicator
The assembling of carbon fiber heating cage：
As shown in figure 4, wherein, carbon fiber vacuum thermal test frock is heated the carbon fiber heating basket structure schematic diagram of the present invention
Cage, including it is opposing parallel erect two connecting rods 2 for arranging, the upper and lower side of two connecting rods 2 is equipped with respectively vertical with connecting rod 2
Also the aluminium profiles that aluminium section bar, the aluminium section bar between connecting rod and outside are set is erect respectively in aluminium section bar, the outside of two connecting rod 2 of setting
Material is fixed by angle coupling 1 form aluminum skeleton 5 respectively, to fix two connecting rods 2, if being respectively arranged with two connecting rods 2
Dry shaped piece 6, the top of a connecting rod 2 arranges Wiring port 3, and another connecting rod bottom equally arranges Wiring port 3, shaped piece 6
Bending space is formed with the surface of connecting rod 2, the carbon fiber heating belt 4 that initiating terminal is connected on Wiring port 3 is different by being wound on
The parallel round arrangement in the bending space of shape part 6 and terminal is connected on another Wiring port 3, with stand-by power source, by test cable with
Wiring port 3 connects, and forms test current loop, wherein, carbon fiber heating belt 4 is formed by the carbon fiber wire braiding of 3K, is many
To ribbon, monfil forms self-locking obvolvent structure.
Its installation step is as follows：
1. it is input into according to thermal design, determines belt distance, the profiled piece 6 processed in corresponding connecting rod in connecting rod 2.
2. skeleton is assembled, skeleton angle coupling 1 is connected with aluminum skeleton 5, then connecting rod 2 is fixed to into aluminum skeleton 5
On.
3. start manual mounting carbon fiber heating belt 4, according to capacity of power demand a plurality of current loop can be arranged, meet each
Plant the testpieces demand for heat of size.
4. the two ends of 4 carbon fiber heating belts are fixed to into Wiring port 3.
5. supply unit is equipped with, test cable is connected with Wiring port 3, form test current loop.
6. after Denso is finished, carbon fiber heating cage is inserted in vacuum tank, be fixed on specified location, i.e., it is ready, etc.
Beginning to be tested.
The use of carbon fiber heating cage：
The a piece of carbon fiber heating cage of 1 trial-production
Three loops are divided, the distribution of the wherein leftmost side is closeer, two other distribution is diluter.In distance heating cage 150mm
Position place one piece of japanning aluminium sheet as testpieces, point for measuring temperature and heat-flow meter are arranged on aluminium sheet, on carbon fiber tape
Also point for measuring temperature is arranged.Experiment is carried out in vacuum tank, and electric current increases electric current 0.5A from the beginning of 0.5A, at set intervals,
Till 3.5A, the measurement data during gathering this is used to analyze, and electric current versus time curve is as shown in Figure 5.Entirely
Experiment is well on, the problems such as there is not short circuit or hot-spot.
2 interpretations
Arrange point for measuring temperature on three carbon fiber tapes, measure temperature under different electric currents tape temperature with the time curve
See Fig. 6.It will be appreciated from fig. 6 that the tape temperature in three loops linearly changes with electric current, with the current curve of Fig. 5 height one is kept
Cause.Because the temperature transducer range used by heat test is limited, so when electric current is changed into 3A, tape temperature is higher than 300 DEG C
No to scale, can determine whether in view of the excellent electric conversion efficiency of carbon fiber, can have application in following 400 DEG C of high temperature experiment field
Value.
Heat-flow meter arranges altogether four on aluminium sheet, wherein first loop arranges three, second loop arranges
One, the temperature curve measured is as shown in Figure 7.
Aluminium sheet used by this is tested is larger, distant, while belt distance is excessive, so aluminium sheet temperature is inadequate
Height, more considers here the temperature of heat-flow meter.The data of heat-flow meter be can be calculated into heat using this Pan-Boltzmann formula of making a mistake
Current density, takes result during maximum current 3.5A, and maximum heat flow density has reached 1040.91W/m2.It follows that in belt distance
In the case of 30mm, lead to 3.5A electric currents, heat flow density has reached more than 1 kilowatt, illustrated carbon fibre materials as thermo electric material
Efficient infra-red radiation ability, the heat flow density that heat test can be met completely is required.
Although giving detailed description to the specific embodiment of the present invention above and illustrating, it should be noted that
We can carry out various equivalent changes and modification to above-mentioned embodiment according to the conception of the present invention, and the function produced by it is made
With still without departing from specification and accompanying drawing covered it is spiritual when, all should be within protection scope of the present invention.
Claims (10)
1. carbon fiber vacuum thermal test frock heating cage, including it is opposing parallel erect arrange two connecting rods, two connecting rods it is upper
Lower end is equipped with respectively the aluminium section bar vertical with connecting rod, and the two connecting rods outside of setting is also erect respectively and arranges aluminium section bar, even
Aluminium section bar between extension bar is fixed to form aluminum skeleton by angle coupling respectively with the aluminium section bar in outside, to fix two connections
Bar, is respectively arranged with some shaped pieces in two connecting rods, a connecting rod top arranges Wiring port, and another connecting rod bottom is same
Wiring port is set, and shaped piece forms bending space with connecting rod surface, and the carbon fiber that initiating terminal is connected on Wiring port adds
The torrid zone is connected on another Wiring port by being wound on the parallel round arrangement in the bending space of shaped piece and terminal, is equipped with electricity
Source, test cable is connected with Wiring port, forms test current loop, wherein, carbon fiber heating belt by 3K carbon fiber wire
Braiding is formed, and is multidirectional ribbon, and monfil forms self-locking obvolvent structure.
2. it is as claimed in claim 1 to heat cage, wherein, the shaped piece in connecting rod is in hook-shaped, and carbon fiber heating belt is straight
Connect to mount and be vertically connected with bar, it is ensured that the wide face of heating tape with skeleton plane in the same direction, forms loop, and the two ends in loop are reserved to be connect
Line end mouth, overall heating tape is evenly distributed on a plane in parallel.
3. it is as claimed in claim 1 to heat cage, wherein, heating tape is carbon fibre material, by the high-temperature shaping glue of content 5%
It is compound with heating wire, and high-temperature heat treatment is carried out, the temperature for making carbon fiber heating belt to adapt to -180 DEG C to+200 DEG C
Change, can accomplish arbitrarily bending and not fracture again.
4. it is as claimed in claim 1 to heat cage, wherein, skeleton is square aluminum pipe, and square aluminum pipe is inserted into angle coupling, and joint is beaten
Hole is fastened with screw.
5. it is as claimed in claim 1 to heat cage, wherein, connecting rod is polytetrafluoroethylene (PTFE) sheet material.
6. the heating cage as described in any one of claim 1-5, wherein, connecting rod is affixed directly to the upper of aluminium skeleton by screw
Lower both sides, parallel distribution.
7. the heating cage as described in any one of claim 1-5, wherein, Wiring port is crimped using copper sheet, wears screw and copper sheet
On.
8. the heating cage as described in any one of claim 1-5, wherein, carbon fiber heating belt employs multidirectional ribbon knot
Structure, section is in flat strip shaped, and per meter of resistance value is in 2 Europe between 8 Europe.
9. the heating cage as described in any one of claim 1-5, wherein, the spectral emissivity of carbon fiber heating belt 0.91 with
On.
10. the heating cage as described in any one of claim 1-5, wherein, the filament diameter of carbon fiber is in 5-7 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109398768A (en) * | 2018-10-23 | 2019-03-01 | 北京卫星环境工程研究所 | Super large infrared heat flow simulator suitable for space station bay section grade spacecraft |
| CN110072304A (en) * | 2018-01-24 | 2019-07-30 | 青岛中邦凌电器有限公司 | A kind of mica heating plate and preparation method thereof and with its manufactured energy saving heating ring |
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| CN106608378B (en) | 2018-09-18 |
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