CN103182509A - Preparation method of porous capillary core for loop heat pipe - Google Patents
Preparation method of porous capillary core for loop heat pipe Download PDFInfo
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- CN103182509A CN103182509A CN2011104495902A CN201110449590A CN103182509A CN 103182509 A CN103182509 A CN 103182509A CN 2011104495902 A CN2011104495902 A CN 2011104495902A CN 201110449590 A CN201110449590 A CN 201110449590A CN 103182509 A CN103182509 A CN 103182509A
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- capillary wick
- capillary core
- metal dust
- porous capillary
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Abstract
The invention relates to a preparation method of a porous capillary core for a loop heat pipe. The porous capillary core is prepared by using metal with better heat conduction property and anti-corrosion property. The porous capillary core prepared by adopting the preparation method has the characteristics of high reliability, high porosity, high penetrating quality, corrosion resistance and uniformity in pore size distribution. The capillary core can be prepared into a column or a flat, and can be used in evaporation chambers with different shapes according to the demand. The porous capillary core is formed by adopting isostatic cool pressing, then processed into a required shape, and is prepared by adopting a method of sintering in a vacuum atmosphere. Through different metal powder combinations, a single metal capillary core and a compound capillary core can be prepared. The porous capillary core can be used in a loop heat pipe with large heat radiating quantity and long transmission distance, and can be applied to the heat control fields of aviation, aerospace, electronics and the like.
Description
Technical field
The invention belongs to heat control field, relate to a kind of preparation method who carries out the porous capillary wick of heat transmission for loop circuit heat pipe.
Background technology
Loop circuit heat pipe is a kind of evaporation of working medium and heat transfer unit (HTU) that heat exchange is carried out in condensation of relying on, and very high thermal conductivity is arranged, and can realize growing under less temperature difference condition transmitting apart from heat.Capillary wick is the core component of loop circuit heat pipe heat transfer unit (HTU), and its effect is the suction force of utilizing capillary wick good, makes the working media in the loop circuit heat pipe can successfully finish the continuous circulation of liquid and gas, thereby reaches the purpose that high-temperature component is conducted heat and dispels the heat.
Compare with conventional heat pipe, loop circuit heat pipe only is furnished with wick structure in evaporimeter, the gaseous working medium pipeline separates fully with the liquid working media pipeline, thereby reduced the resistance that working media flows in the pipeline, improved heat transmittability and the transmission range of loop circuit heat pipe, the heat flow of its transmission is than the big at least order of magnitude of conventional heat pipe, simultaneously, loop circuit heat pipe is arranged more flexible, and certain antigravity height can be provided.Fast development along with Aeronautics and Astronautics and electron trade, the heat producing components heat flow density is increasing, the integrated level of equipment is more and more higher, need the heat abstractor of long distance, high cooling efficiency to satisfy actual needs, but traditional heat abstractor can not satisfy the requirement of high heat dissipation capacity and long distance heat radiation, loop circuit heat pipe can satisfy the requirement of long distance, high cooling efficiency simultaneously, can utilization and the heat abstractor of the critical component of Aeronautics and Astronautics and electron trade.
The method for preparing at present capillary wick is a lot, as adopting the capillary wick of soft fibre weaving or establishment, adopts the porous capillary wick of reprocessing behind the sintering, also has the capillary wick that adopts the pottery preparation.For the capillary wick of soft fibre weaving or establishment, the aperture of this capillary wick is bigger, and permeability is too high, and capillary suction force is little, and cooling effectiveness is low.Adopt the capillary wick of reprocessing behind the sintering to be applied to the preparation of single metal porous capillary wick usually, but cause porosity to descend owing to add cutting surface obstruction in man-hour, cause unstable product quality.The capillary wick of pottery preparation has less aperture, anti-working media corrosion, but ceramic distinctive fragility makes it occur crackle easily under vibration environment, causes capillary wick to lose efficacy.
Patent content
At above-mentioned deficiency, the invention provides a kind of preparation method of the porous capillary wick for loop circuit heat pipe, the porous capillary wick is to utilize heat conductivility and the preparation of corrosion resistance preferred metal, prepared porous capillary wick has high reliability, high porosity, the high osmosis energy, corrosion-resistant, the characteristics of even aperture distribution.And the preparation method is simple, and the mechanical strength height is better than the capillary wick that ceramic material capillary wick and soft fiber material are worked out.
A kind of preparation method of the porous capillary wick for loop circuit heat pipe, this method is as follows: with the metal dust sealing then in the mould of packing into, put into cold isostatic press and suppress, the base substrate that suppresses is carried out machining, sintering obtains the porous capillary wick more at last.
Described metal dust is one or more metal dusts, and when being a kind of metal dust, the porous capillary wick that makes is single metal capillary wick; When being multiple metal dust, multiple metal dust be packed in order in the mould, finally make compound capillary wick.
Described metal dust can be stainless steel powder, titanium valve or nickel powder etc.
A kind of situation commonly used is: metal dust is two kinds, and two kinds of metal dusts are packed in the mould in order, finally makes compound capillary wick, two kinds of preferred stainless steel powders of metal dust and nickel powder.
Can be prepared into column by machining, also can be prepared into plate shapedly, be used for difform vaporization chamber as required.The corresponding porous capillary wick cross sectional shape that makes is circle or rectangle (as Fig. 1) normally.
Briquetting pressure during described the compacting is 10MPa～300MPa.
The temperature of described sintering is 100 ℃～800 ℃, and sintering atmosphere is vacuum, argon gas, hydrogen or nitrogen.
Beneficial effect of the present invention is:
(1) capillary suction force is big: because the minimum-value aperture of capillary wick only is 0.1um, therefore have big capillary suction force;
(2) permeability height: capillary wick adopts composite construction, by the cooperation to the capacity of heat transmission and aperture, can prepare high low porosity collocation, has high permeability, the capillary wick of big capillary draft.
(3) good stability: capillary wick adopts metal material, and adopts methods such as isostatic cool pressing and atmosphere sintering, and mates with loop circuit heat pipe tube wall thermophysical property, and is reliability and durability under the bigger condition of variations in temperature.
(4) preparation is simple: adopt cold isostatic compaction, machining goes out required shape then, carries out sintering again, and manufacturing cycle is short, and yield rate is expensive low.
(5) applied range: can prepare the capillary wick of different sizes, by different metal dust combinations, can prepare single metal capillary wick and compound capillary wick.Can be used for large-scale and small heat-dissipating device very easily.The present invention is used for the loop circuit heat pipe that heat dissipation capacity is big, transmission range is long, can be applicable to thermal control fields such as Aeronautics and Astronautics, electronics.
Description of drawings
Fig. 1 capillary wick shape of cross section;
The compound capillary wick combining form longitudinal section that Fig. 2 is made by two kinds of metal dusts.
The specific embodiment
The invention provides a kind of loop circuit heat pipe preparation method of capillary wick, this method is with the metal dust sealing then in the mould of packing into, make itself and the external world reach sealing state, putting into cold isostatic press suppresses under the technology of regulation, the base substrate that suppresses is by being machined into required shape and size, put into sintering furnace then and carry out sintering according to concrete process conditions, what obtain behind the sintering is exactly required capillary wick.
The present invention will be further described below by specific embodiment.
Embodiment 1: with the sealing then in the mould of packing into of the Ti powder of particle mean size 3um, make itself and the external world reach sealing state, putting into cold isostatic press suppresses under 50MPa technology, the base substrate that suppresses is by being machined into the cylinder of high 104mm diameter 42mm, put into sintering furnace then at 500 ℃, be incubated 120 minutes vacuum atmosphere conditions and carry out sintering, what obtain behind the sintering is exactly the cylinder capillary wick of high 100mm diameter 40mm, porosity 55%, permeability 8.24 * 10
-14m
2, average pore size is 0.97um.
Embodiment 2:
With the sealing then in the mould of packing into of the powder of stainless steel of particle mean size 30um, make itself and the external world reach sealing state, putting into cold isostatic press suppresses under 150MPa technology, the base substrate that suppresses is put into sintering furnace at 800 ℃ then by the flat board of the wide 106mm of the high 10.7mm of machining growth 325mm, is incubated 120 minutes, the argon gas atmosphere condition is carried out sintering, what obtain behind the sintering is exactly the dull and stereotyped capillary wick of the wide 100mm of the high high 10mm of long 300mm, porosity 43%, permeability 4.18 * 10
-12m
2, average pore size is 8um.
Embodiment 3:
With the sealing then in the mould of packing into of the nickel by powder of particle mean size 10um, make itself and the external world reach sealing state, putting into cold isostatic press suppresses under 300MPa technology, the base substrate that suppresses is put into sintering furnace at 100 ℃ then by being machined into the cylinder of high 402mm diameter 30.2mm, is incubated 120 minutes, the hydrogen atmosphere condition is carried out sintering, what obtain behind the sintering is exactly the cylinder capillary wick of high 400mm diameter 30mm, porosity 56%, permeability 4.33 * 10
-14m
2, average pore size is 3um.
Embodiment 4:
With the sealing then in the mould of packing in order of the powder of stainless steel of the nickel by powder of particle mean size 2.6um and particle mean size 15um, make itself and the external world reach sealing state, putting into cold isostatic press suppresses under 180MPa technology, the base substrate that suppresses is by being machined into the cylinder of high 540mm diameter 55mm, making the stainless steel segment length is 150mm, the nickel segment length is 390mm (as Fig. 2), put into sintering furnace then at 700 ℃, be incubated 120 minutes, the nitrogen atmosphere condition is carried out sintering, and what obtain behind the sintering is exactly the compound capillary wick of cylinder stainless steel/nickel of high 500mm diameter 50mm.
Claims (8)
1. preparation method who is used for the porous capillary wick of loop circuit heat pipe, it is characterized in that: this method is as follows:
With the metal dust sealing then in the mould of packing into, put into cold isostatic press and suppress, the base substrate that suppresses is carried out machining, sintering obtains the porous capillary wick more at last;
Described metal dust is one or more metal dusts, and when being a kind of metal dust, the porous capillary wick that makes is single metal capillary wick; When being multiple metal dust, multiple metal dust be packed in order in the mould, finally make compound capillary wick.
2. method according to claim 1, it is characterized in that: metal dust has two kinds, and two kinds of metal dusts are packed in the mould in order, finally makes compound capillary wick.
3. method according to claim 2, it is characterized in that: metal dust is nickel powder and stainless steel powder, and nickel powder and stainless steel powder are packed in the mould in order, finally makes compound capillary wick.
4. method according to claim 1, it is characterized in that: described metal dust is one or more in stainless steel powder, titanium valve or the nickel powder.
5. method according to claim 1, it is characterized in that: the cross sectional shape of described porous capillary wick is circle or rectangle.
6. method according to claim 1 is characterized in that: the briquetting pressure during described compacting is 10MPa～300MPa.
7. method according to claim 1, it is characterized in that: the temperature of described sintering is 100 ℃～800 ℃.
8. method according to claim 1, it is characterized in that: the atmosphere of described sintering is vacuum, argon gas, hydrogen or nitrogen atmosphere.
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| CN2011104495902A CN103182509A (en) | 2011-12-29 | 2011-12-29 | Preparation method of porous capillary core for loop heat pipe |
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| CN2011104495902A CN103182509A (en) | 2011-12-29 | 2011-12-29 | Preparation method of porous capillary core for loop heat pipe |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238725A (en) * | 2016-08-31 | 2016-12-21 | 昆山德泰新材料科技有限公司 | A kind of thermal conductance copper powder of high wicking rate low-apparent-density and preparation method thereof |
| CN108069720A (en) * | 2017-12-07 | 2018-05-25 | 中国科学院上海硅酸盐研究所 | A kind of gradient porous capillary wick of loop circuit heat pipe silicon nitride and preparation method thereof |
| CN110102761A (en) * | 2019-06-11 | 2019-08-09 | 株洲新科硬质合金有限公司 | A kind of micropore hard alloy material preparation method |
| CN110303153A (en) * | 2019-06-28 | 2019-10-08 | 安泰环境工程技术有限公司 | A kind of processing method of capillary wick and its assembly method with shell |
| CN111189346A (en) * | 2020-01-10 | 2020-05-22 | 中国矿业大学 | Porous copper-wood fiber/polystyrene double-layer composite capillary core for loop heat pipe and preparation method thereof |
| CN113290248A (en) * | 2021-05-07 | 2021-08-24 | 南京工业大学 | Preparation method of metal capillary core with multilayer structure |
| CN115351280A (en) * | 2022-08-22 | 2022-11-18 | 西北有色金属研究院 | Integrated preparation method of evaporator for loop heat pipe |
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| JP2002318085A (en) * | 2001-04-18 | 2002-10-31 | Hitachi Cable Ltd | Heat pipe and its manufacturing method |
| US20090159242A1 (en) * | 2007-12-19 | 2009-06-25 | Teledyne Licensing, Llc | Heat pipe system |
| CN101839663A (en) * | 2010-05-12 | 2010-09-22 | 锘威科技(深圳)有限公司 | Sintered flat plate heat pipe and manufacturing method thereof |
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2011
- 2011-12-29 CN CN2011104495902A patent/CN103182509A/en active Pending
Patent Citations (3)
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| JP2002318085A (en) * | 2001-04-18 | 2002-10-31 | Hitachi Cable Ltd | Heat pipe and its manufacturing method |
| US20090159242A1 (en) * | 2007-12-19 | 2009-06-25 | Teledyne Licensing, Llc | Heat pipe system |
| CN101839663A (en) * | 2010-05-12 | 2010-09-22 | 锘威科技(深圳)有限公司 | Sintered flat plate heat pipe and manufacturing method thereof |
Non-Patent Citations (1)
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| 曲燕: "小型环路热管多孔镍毛细管芯的研制", 《粉末冶金工程》, vol. 20, no. 2, 30 April 2010 (2010-04-30) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238725A (en) * | 2016-08-31 | 2016-12-21 | 昆山德泰新材料科技有限公司 | A kind of thermal conductance copper powder of high wicking rate low-apparent-density and preparation method thereof |
| CN108069720A (en) * | 2017-12-07 | 2018-05-25 | 中国科学院上海硅酸盐研究所 | A kind of gradient porous capillary wick of loop circuit heat pipe silicon nitride and preparation method thereof |
| CN108069720B (en) * | 2017-12-07 | 2020-11-10 | 中国科学院上海硅酸盐研究所 | Silicon nitride gradient porous capillary core for loop heat pipe and preparation method thereof |
| CN110102761A (en) * | 2019-06-11 | 2019-08-09 | 株洲新科硬质合金有限公司 | A kind of micropore hard alloy material preparation method |
| CN110102761B (en) * | 2019-06-11 | 2021-03-09 | 株洲新科硬质合金有限公司 | Preparation method of microporous hard alloy material |
| CN110303153A (en) * | 2019-06-28 | 2019-10-08 | 安泰环境工程技术有限公司 | A kind of processing method of capillary wick and its assembly method with shell |
| CN111189346A (en) * | 2020-01-10 | 2020-05-22 | 中国矿业大学 | Porous copper-wood fiber/polystyrene double-layer composite capillary core for loop heat pipe and preparation method thereof |
| CN113290248A (en) * | 2021-05-07 | 2021-08-24 | 南京工业大学 | Preparation method of metal capillary core with multilayer structure |
| CN113290248B (en) * | 2021-05-07 | 2022-02-22 | 南京工业大学 | Preparation method of metal capillary core with multilayer structure |
| CN115351280A (en) * | 2022-08-22 | 2022-11-18 | 西北有色金属研究院 | Integrated preparation method of evaporator for loop heat pipe |
| CN115351280B (en) * | 2022-08-22 | 2024-01-19 | 西北有色金属研究院 | Integrated preparation method of evaporator for loop heat pipe |
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Application publication date: 20130703 |