CN208653280U - A kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick - Google Patents

Abstract

A kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick of the utility model, belongs to porous media phase transformation and flow technique field.For the capillary wick of the utility model using foam metal as skeleton, fiber is transformed foam metal skeleton macropore, forms aperture between fiber, realizes that there are the porous structures of Based on Dual-Aperture in a space.The utility model is using foam metal as skeleton, shape is easy to control in the preparation, the capillary wick prepared is light, porosity is higher, mechanical strength is big, and there is certain flexibility, fiber is transformed foam metal skeleton, the capillary wick prepared has high capillary suction force, high permeability, the flowing heat transfer characteristic of low effective thermal conductivity and high surface evaporation rate, it is applied in loop circuit heat pipe, internal heat and mass can be strengthened, reduce hot backwards to leaking, stablize loop circuit heat pipe running temperature and transformation interface, accelerate loop circuit heat pipe starting, to improve the runnability of loop circuit heat pipe.

Description

A kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick

Technical field

The utility model relates to porous media phase transformations and flow technique field, are applied to ring more specifically to one kind The foam metal of road heat pipe-fiber composite capillary wick can be used for the fields such as Electronic cooling and aviation thermal control.

Background technique

Loop circuit heat pipe (LoopHeatPipe, abbreviation LHP) is a kind of efficient passive biography using Working fluid phase changing transmitting heat Thermal has many advantages, such as that movement-less part, good heat-transfer, transmission range are long.Loop circuit heat pipe is by evaporator, evaporation tube A kind of separate heat pipe that road, condenser, fluid pipeline and compensated cavity form.Capillary wick is arranged at evaporator, is mentioned for system For power and phase-change heat-exchange place.Loop circuit heat pipe system work process is as shown in Fig. 1: after thermal component is bonded with evaporator 5, Heat is imported inside capillary wick 10 by 5 wall surface of evaporator, and internal working medium is undergone phase transition after capillary wick 10 is heated, and forms phase transformation Interface, steam are condensed into subcooled liquid into condenser 7 by jet chimney 6, and subcooled liquid is back to compensation through fluid pipeline 8 Chamber 9, the liquid in compensated cavity 9 are continuously replenished the liquid evaporated in capillary wick 10, this evaporation-condensation cycle process is by radiating part The heat of part is constantly transferred to the external world.

When loop circuit heat pipe system is run, phase transformation occurs in capillary wick, while capillary wick provides capillary suction force for system, It is also whole system sole power source.Currently used capillary wick mainly has single metal powder sintered capillary wick, Yi Ji Filler is added on the basis of this and sinters Based on Dual-Aperture capillary wick into, aperture can increase the suction force of capillary wick, and macropore reduces working medium Flow resistance, is conducive to the disengaging of steam and the timely compensation of liquid, but this advantage with filler is added to it is a certain amount of after It will disappear.Metal powder sintered capillary wick is often prepared with the method that cold moudling is sintered, and is pressurizeed after powder mixing, is led to capillary wick Internal pine dress hole is extruded, and is formed closed pore or half aperture after the hole sintering of extruding, is reduced duct, porosity reduces；If Loose sintering, capillary wick powder inside are not easy to bond, and mechanical strength is lower.

In order to reinforce capillary wick internal working medium phase transformation, capillary wick often uses the higher metal material of thermal coefficient, capillary at present Core effective thermal conductivity increases, and larger backwards to leaking heat in system operation, compensated cavity temperature increases, system operating temperature liter Height, while increasing the fluctuation of system operation.Fluid temperature is undergone phase transition after increasing in compensated cavity, and internal pressure increases, and is Running resistance of uniting increases.As thermic load increases when system is run, working medium evaporation rate is gradually increased, and working medium supplement is led not in time Transformation interface is caused internally to migrate, vapor film thickness will increase, and the increase of capillary wick thermal resistance influences system run all right.For this purpose, It designs that a kind of evaporation rate is high, effective thermal conductivity is low and is capable of the function admirable capillary wick at steady-state evaporation interface, is to be badly in need of at present It solves the problems, such as.

Through retrieving, the capillary wick about loop circuit heat pipe designs existing patent disclosure, such as Chinese Patent Application No.: 2004101030689, the applying date: on December 30th, 2004, invention and created name are as follows: composite capillary core of capillary pump loop in two phases and Preparation method, this application discloses a kind of composite capillary core of capillary pump loop in two phases and preparation method thereof, composite wicks Core outside small-bore is arranged in inner core including a large aperture, inner core outside, and the permeability of the composite construction capillary wick of this application has Increased, efficient CPL can be developed；For another example Chinese Patent Application No.: 2016102861131, the applying date: on April 28th, 2016, hair Bright creation title are as follows: a kind of compound porous capillary wick of powder microfibre applied to loop circuit heat pipe system, the capillary wick is using gold Belong to powder and microfibre mixed sintering, connected between metal powder by microfibre, realizes the aperture of microfibre formation between powder The Based on Dual-Aperture porous media structure of the large aperture formed between diameter and particle powder；The unique structure of the capillary wick, which assigns it, to be had High capillary suction force, low flow resistance, high surface evaporation rate and low efficient thermal conductivity flowing heat transfer characteristic；It is applied to ring Road hot-pipe system can strengthen internal heat and mass, stablize the evaporative phase-change interface of working medium, reduce the leakage heat to compensated cavity, The temperature fluctuation for eliminating or weakening system operation, to improve the runnability of loop circuit heat pipe.The above application case is to loop warm Pipe wick structure is made that optimization design, helps to improve overall operation performance, but it still has the space further promoted.

Utility model content

1. utility model technical problems to be solved

Bad, influence loop circuit heat pipe operation that the purpose of the utility model is to overcome wick structure performances in the prior art The deficiency of stability provides a kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick, can make full use of hair The hole of thin core inner, reduces the thickness and quality of capillary wick, using foam metal as skeleton, capillary wick high mechanical strength and has one Fixed flexibility；Loop circuit heat pipe system operation when, capillary wick surface coefficient of heat transfer with higher, whole effective thermal conductivity compared with It is low, guarantee to be reduced while heat dissipation backwards to leakage heat；In configuration aspects, capillary wick hole is more and porosity is larger, shape between fiber At aperture so that capillary wick is had enough capillary suction forces, while providing attachment surface for transformation interface, play stable transformation interface Effect, the large aperture that foam metal skeleton is formed reduces the resistance of Working fluid flow, and when use can also effectively reduce system ruler It is very little, enhance applicability, further promotes the performance of loop circuit heat pipe；In terms of preparation, foam metal is completed by machining, can The shape according to needed for capillary wick and size make foam metal, and sintering is unlikely to deform, and size and shape are controllable.

2. technical solution

In order to achieve the above objectives, technical solution provided by the utility model are as follows:

A kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the utility model, the capillary wick For Based on Dual-Aperture porous media structure, comprising: fiber, foam metal skeleton, fiber hole and foam metal matrix porosity；Fiber It is distributed in foam metal skeletal internal, the fiber hole of small-bore is formed between fiber, forms macropore between foam metal skeleton The foam metal matrix porosity of diameter.

Further, it is more than the foam metal material of 100W/mK that foam metal skeleton, which uses thermal conductivity,.

Further, foam metal skeleton uses aperture for the foam metal material of 50-150um.

Further, fiber uses draw ratio for 5-10, the metal material of length 10-40um.

3. beneficial effect

Using technical solution provided by the utility model, compared with prior art, there is following remarkable result:

(1) a kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the utility model has excellent Good heat and mass ability: specifically, the large aperture hole with foam metal skeleton, and have the small size pores formed between fiber Gap；Working medium when single-phase flow, mainly carries out in foam metal skeleton inside capillary wick, and single-phase flow resistance is lower；Fiber Attachment surface is provided for evaporative phase-change interface, and the small-bore hole formed between fiber considerably increases the capillary pumped of capillary wick Power；In terms of heat transfer, with fiber transformation foam metal skeleton preparation, half aperture closed pore inside capillary wick, gained are substantially reduced It is high to capillary wick porosity utilization rate；The wetability of capillary wick is enhanced simultaneously, is increased and working medium contact area；Fibre structure Augmentation of heat transfer enhances the evaporation of transformation interface.Therefore foam metal-fiber composite the capillary wick of the utility model is a kind of high Permeability, the high-performance capillary wick of high suction, high surface evaporation.

(2) a kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the utility model, applicability By force, porosity is high, and hole utilization rate is big: specifically, using foam metal as skeleton, foam metal can be completed by machining, The shape according to needed for capillary wick and size make foam metal, and sintering is unlikely to deform, and size and shape are controllable；It can be according to required Porosity calculates and fibre weight is added.Foam metal skeleton is support, and the capillary wick mechanical strength prepared is higher, has simultaneously Certain flexibility, is more applicable for loop circuit heat pipe.Foam metal light weight itself, porosity are high, be added some fibre to its from The macropore that body has is transformed, and makes full use of foam metal internal void, obtains that macropore can be existed simultaneously in the same space With the diplopore gauge structure capillary wick of aperture.Therefore the capillary wick of the utility model is a kind of strong applicability, lightweight, hole utilization rate Big Based on Dual-Aperture capillary wick.

(3) a kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the utility model, heat-transfer area Product is small, and thermal conductivity is lower, and stablize loop circuit heat pipe running temperature: specifically, fiber and foam metal skeleton contact area are small, sintering The sintering neck formed afterwards is small, significantly increases the specific surface area of capillary wick, increases the heat exchange area with working medium；Reduce heat-transfer area Product reduces capillary wick effective thermal conductivity.The heat for being loaded into evaporator is wicked by capillary to be received, and transformation interface, heat quilt are reached Working medium, which is undergone phase transition, in capillary wick takes away；Capillary wick effective thermal conductivity is lower, reduces the work made in compensated cavity backwards to leakage heat Matter temperature is lower, reduces loop circuit heat pipe running temperature, while reducing compensated cavity internal cause bubble formation, vanishing and bring pressure and temperature Fluctuation.

(4) a kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the utility model, facilitates Accelerate loop circuit heat pipe starting, stablize transformation interface: specifically, foam metal selects the metal material of high thermal conductivity, capillary wick table Face heat transfer coefficient is high, and heat conducts to capillary wick working medium and comparatively fast absorbs evaporation；Foam metal skeleton greatly reduces steam and flees from Resistance, stablize transformation interface；Capillary wick entirety effective thermal conductivity is small, backwards to hot smaller, temperature of the heat to compensated cavity of leakage Influence is smaller, and internal pressure rising is slower, and whole system establishes the pressure difference of starting operation quickly, accelerates the starting fortune of system Row.Fiber is attached to foam metal skeleton, provides more attachment surfaces for transformation interface, forms more evaporation meniscus, work Matter evaporative phase-change is strengthened, while reducing the radius of curvature of meniscus, enhances the stability at interface.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of loop circuit heat pipe in the prior art；

Fig. 2 is that a kind of structure of the foam metal applied to loop circuit heat pipe-fiber composite capillary wick of the utility model is shown It is intended to；

Fig. 3 is that foam metal skeleton is illustrated compared with the foam metal skeleton transformation interface of fiberfill fibers in the utility model Figure, wherein (a) is metallic framework transformation interface schematic diagram, it (b) is the metallic framework transformation interface schematic diagram of fiberfill fibers.

Schematic diagram label declaration: 1, fiber；2, foam metal skeleton；3, fiber hole；4, foam metal matrix porosity；5, Evaporator；6, steam pipework；7, condenser；8, liquid line；9, compensated cavity；10, capillary wick；11, foam metal skeleton phase transformation Meniscus；12, the foam metal phase transformation meniscus of fiberfill fibers.

Specific embodiment

For the content for further appreciating that the utility model, the utility model is described in detail in conjunction with attached drawing.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

Below with reference to embodiment, the utility model will be further described.

Embodiment 1

As shown in Figures 2 and 3, a kind of foam metal applied to loop circuit heat pipe system-fiber composite hair of the present embodiment Thin core, the capillary wick are Based on Dual-Aperture porous media structure, comprising: fiber 1, foam metal skeleton 2, fiber hole 3 and foam Metallic framework hole 4；Wherein fiber 1 is distributed in inside foam metal skeleton 2, and fiber 1 is transformed foam metal skeleton 2, The fiber hole 3 that small-bore is formed between fiber 1, forms the foam metal matrix porosity of large aperture between foam metal skeleton 2 4, i.e. hole of the foam metal skeleton 2 itself with large aperture, fiber hole 3 is present in inside foam metal matrix porosity 4, makes The Working fluid flow characteristic that large aperture and small-bore share is shown in one space of capillary wick simultaneously, i.e. aperture can increase capillary The suction force of core, macropore reduce Working fluid flow resistance.

Foam metal skeleton 2 is made of the foam metal material that thermal conductivity is more than 100W/mK in the present embodiment, such as foam Copper, foamed aluminium and Foam silver etc., the aperture of foam metal are 50um, and fiber 1 then uses draw ratio for 5, the metal of length 10um Material；Cooperatively forming a kind of strong applicability, lightweight, high porosity, high permeability, high aspirate by foam metal and fiber 1 Property, high surface evaporation rate and low effective thermal conductivity high-performance capillary wick, foam metal constitute capillary wick skeleton, itself tool There are large aperture hole, foam metal light weight, porosity height, high mechanical strength, and there is certain flexibility；1 pair of fiber bubble Macropore is transformed in foam metallic framework 2, makes full use of the hole inside capillary wick, is reduced the thickness and quality of capillary wick, is made Obtaining capillary wick has certain flexibility, enhances the applicability of capillary wick；Secondly, capillary wick using foam metal as skeleton, is being made It is not required to pressurize when standby, avoid because pressurization leads to the risk for generating closed pore and half aperture due to powder contact is more, while can basis The size and loading of suction force needed for capillary wick and porosity size selection fiber 1.

A kind of processing method of foam metal applied to the loop circuit heat pipe system-fiber composite capillary wick of the present embodiment, Include the following steps:

Step 1: preparing fibrous raw material and foam metal raw material, foam metal is placed in sintering mold, by fibrous raw material It is uniformly mixed to form powder with filler, mixed powder is uniformly then put into foam metal, fills out mixed powder Full foam metal hole；

Specifically, prepare the foam metal that aperture is 50um and the fibre metal material that draw ratio is 5, length is 10um, Fibre metal is uniformly mixed with filler, filler uses NaCl, wherein the solid volume of fibre metal raw material and filler Than for 1:0.6；The solid volume ratio of foam metal raw material and fibre metal raw material is 1:1；Capillary wick is adjusted by filler Porosity and porosity size, mixed powder are less than the hole aperture of foam metal, 1 meeting of fiber due to the length of fiber 1 Its hole is filled, after being filled up completely, mold, which is put into 20-40min in ultrasonic wave, (makes powder in specific the present embodiment for 30min) It is evenly distributed；The accurately proportion of each raw material is most important in the present embodiment, by strict control raw material proportioning, keeps fiber 1 abundant Filling, both having avoided to fill because of fiber 1 excessively leads to the reduction of capillary wick porosity, thermal conductivity increase, flow resistance increase, loop Heat pipe runnability reduced, backwards to the defects of leaking heat increase；Also avoiding filling because of fiber 1 very few leads to capillary wick porosity mistake Greatly, capillary wick duct quantity is reduced, capillary wick capillary suction force reduces, transformation interface meniscus quantity is reduced, meniscus curvature The defects of radius increases, system run all right reduces, full-scope safeguards capillary core performance.

30min is sintered Step 2: sintering mold is put into vacuum drying oven；Specifically, sintering temperature is fibrous raw material fusing point 40-50%；350-400 DEG C is preheated to (specifically in the present embodiment more specifically, first entire mold is put into vacuum drying oven In be 350 DEG C), continue to be heated to fibrous raw material fusing point after heat preservation 30-40min (specifically in the present embodiment be 30min) 40-50%, and keep the temperature 30-40min (specifically in the present embodiment for 30min) makes between fiber 1, fiber 1 and foam metal bone Frame 2 is bonding；When temperature reaches the 40% of fibrous raw material fusing point, powder contact position starts to fuse, and reaches 50% in temperature When there is powder sintered neck phenomenon, make capillary wick have certain intensity, the present embodiment strict control sintering temperature, ensure capillary Core inner structure sintering quality ensures internal void quantity.

Step 3: taking out demoulding after cooling to capillary wick with the furnace 100 DEG C or less after sintering, and adopted with deionized water With ultrasonic cleaning 2 hours, until filler is cleaned, it is then placed in drying box and is dried 3 hours at a temperature of 100 DEG C, Capillary wick sample is made.

When the capillary wick of the present embodiment works in systems, heat is loaded into inside capillary wick 10 by evaporator 5, and working medium exists Formation gas-liquid interface in capillary wick 10, fiber 1 and foam metal skeleton 2 provide attachment surface, and 3 hole of fiber hole for gas-liquid interface Diameter is smaller, enhances the stability at interface, while increasing heat exchange area, is conducive to heating working medium, and evaporative phase-change is promoted to take away Heat is reduced hot backwards to leaking.As shown in Fig. 3 comparison, transformation interface is attached to merely on foam metal skeleton 2 in figure (a), foam 4 aperture of metallic framework hole is larger, the quantity of the capillary suction force and foam metal skeleton phase transformation meniscus 11 that can be provided It is less；Fiber 1 is transformed 2 inside aperture of foam metal skeleton in figure (b), and transformation interface is attached to foam metal skeleton 2 Between fiber 1, the small-bore of formation is capable of providing bigger capillary suction force, at the same fiber 1 exist for its provide it is more Attachment surface, form the foam metal phase transformation meniscus 12 of more fiberfill fibers, enhance the stability at interface.

When the present embodiment intermediate ring road hot-pipe system is run, the 2 biggish foam metal matrix porosity 4 in inside of foam metal skeleton Be conducive to Working fluid flow, the steam undergone phase transition is detached from evaporator 5 quickly, and system resistance is effectively reduced, and increases system stability； Lesser fiber hole 3 increases the suction force of capillary wick 10 between fiber 1, and the working medium undergone phase transition is replenished in time, phase Become interface stability in a certain range, substantially reducing 10 transformation interface of capillary wick, internally movement relatively causes system to be unable to run deeply Risk；And 10 evaporation rate of capillary wick is higher, so that electronic component heat is most of because Working fluid phase changing is taken away, while the capillary 10 effective thermal conductivity of core is lower, effectively reduces system and leaks heat backwards, so that system is more stable.

It should be noted that the capillary wick 10 in the present embodiment has excellent heat and mass ability, make a concrete analysis of as follows: With the large aperture hole that foam metal skeleton 2 has itself, and with the small-bore hole formed between fiber 1, working medium is in hair It when thin 10 inside single-phase flow of core, is mainly carried out in foam metal skeleton 2, single-phase flow resistance is lower, and fiber 1 is evaporation Transformation interface provides attachment surface, and the small-bore hole between fiber 1 considerably increases the capillary suction force of capillary wick 10；It is conducting heat Aspect is transformed foam metal skeleton 2 with fiber 1, half aperture inside capillary wick 10, closed pore is substantially reduced, so that capillary wick 10 porosity, utilization rate are higher, while enhancing the wetability of capillary wick 10, increase and working medium contact area；And fiber 1 structure facilitates augmentation of heat transfer again, enhances the evaporation of transformation interface；Therefore, the foam metal-fiber of the present embodiment is multiple Close the high-performance capillary wick that capillary wick is high permeability, high suction, high surface evaporation.

Secondly, the foam metal of the present embodiment-fiber composite capillary wick, is prepared, foam by skeleton of foam metal Metal can by machining complete, can the shape according to needed for capillary wick 10 and size machining production foam metal, sintering It is unlikely to deform, and the additional amount of fiber 1 can be calculated according to required porosity, so that the porosity of capillary wick 10, size and shape All it is relatively easy to control；Secondly, being support with foam metal skeleton 2,10 mechanical strength of capillary wick prepared is higher, and has certain Flexibility, is more suitable loop circuit heat pipe；Again, foam metal light weight itself, porosity are high, and fiber 1, which is added, has its own Macrovoid be transformed, make full use of foam metal internal void, finally prepare lightweight, the Based on Dual-Aperture capillary of high porosity Core.

Again, the foam metal of the present embodiment-fiber composite capillary wick, also has that heat transfer area is small, thermal conductivity is more low Performance can stablize loop circuit heat pipe running temperature.Specifically, many scholars have acted numerous studies to loop circuit heat pipe temperature wave, recognize It is the principal element of system operating temperature fluctuation for the pressure and temperature fluctuation in compensated cavity；Foam metal-the fibre of the present embodiment Composite wick is tieed up, fiber 1 and 2 contact area of foam metal skeleton are small, and the sintering neck formed after sintering is small, considerably increase hair The specific surface area of thin core 10, increases the heat exchange area with working medium；Heat transfer area is reduced simultaneously, capillary wick 10 is reduced and effectively leads Hot coefficient.The heat for being loaded into evaporator 5 is absorbed by capillary wick 10, reaches transformation interface, and heat is sent out by working medium in capillary wick 10 Raw phase transformation is taken away；The reduction of 10 effective thermal conductivity of capillary wick, reduce backwards to leak heat make Temperature of Working in compensated cavity 9 compared with It is low, to reduce loop circuit heat pipe running temperature, while reducing 9 internal cause bubble formation of compensated cavity, vanishing and bring pressure and temperature wave It is dynamic.

Finally, the foam metal of the present embodiment-fiber composite capillary wick, additionally aids and accelerates loop circuit heat pipe starting, stablize Transformation interface.Specifically, foam metal uses the metal material of high thermal conductivity, and 10 surface coefficient of heat transfer of capillary wick is high, and heat passes Evaporation is comparatively fast absorbed to capillary wick 10；Foam metal skeleton 2 greatly reduces the resistance that steam is fled from, and stablizes transformation interface；Hair The whole effective thermal conductivity of thin core 10 is smaller, and backwards to leaking, heat is smaller, and heat influences smaller, internal pressure to the temperature of compensated cavity 9 Rising is slower, and whole system establishes the pressure difference of starting operation quickly, accelerates the starting operation of system；Fiber 1 is attached to foam On metallic framework 2, more attachment surfaces are provided for transformation interface, form more evaporation meniscus, working medium evaporative phase-change obtains Strengthen, while reducing the radius of curvature of meniscus, enhances the stability at interface.

Embodiment 2

A kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the present embodiment, basic structure are same Embodiment 1, the difference is that foam metal skeleton uses aperture for the foam metal material of 150um in the present embodiment, fiber is adopted It is 10 with draw ratio, length is the metal material of 40um.

A kind of processing method of foam metal applied to the loop circuit heat pipe system-fiber composite capillary wick of the present embodiment, Substantially with embodiment 1, except that:

Filler is Na in step 1₂CO₃, selecting aperture for the foam metal material and draw ratio of 150um is 10, long Degree is the fibre metal material of 40um, and the solid volume ratio of fibrous raw material and filler is 1:1, foam metal and fibrous raw material Solid volume ratio is 1:3；After foam metal hole in mold is filled, mold, which is put into 20min in ultrasonic wave, makes mixed powder End is uniformly distributed；

Sintering mold is put into vacuum drying oven in step 2 and is sintered 50min, specifically, entire mold is first put into vacuum drying oven In be preheated to 400 DEG C, continue the 40-50% for being heated to fibrous raw material fusing point after keeping the temperature 40min, and keep the temperature 40min；

It uses ultrasonic cleaning 3 hours in step 3, and is dried 5 hours at a temperature of 110 DEG C.

Embodiment 3

A kind of foam metal applied to loop circuit heat pipe system-fiber composite capillary wick of the present embodiment, basic structure are same Embodiment 1, the difference is that foam metal skeleton uses aperture for the foam metal material of 100um in the present embodiment, fiber is adopted It is 8 with draw ratio, length is the metal material of 30um.

A kind of processing method of foam metal applied to the loop circuit heat pipe system-fiber composite capillary wick of the present embodiment, Substantially with embodiment 1, except that:

Filler is urea in step 1, and selecting aperture for the foam metal material and draw ratio of 100um is 8, length For the fibre metal material of 30um, the solid volume ratio of fibrous raw material and filler is 1:0.8, foam metal and fibrous raw material Solid volume ratio be 1:2；After foam metal hole in mold is filled, mold, which is put into 40min in ultrasonic wave, to be made to mix Powder is uniformly distributed；

Sintering mold is put into vacuum drying oven in step 2 and is sintered 40min, specifically, entire mold is first put into vacuum drying oven In be preheated to 360 DEG C, continue the 40-50% for being heated to fibrous raw material fusing point after keeping the temperature 35min, and keep the temperature 35min；

It uses ultrasonic cleaning 2.5 hours in step 3, and is dried 4 hours at a temperature of 90 DEG C.

Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing Shown in be also one of the embodiments of the present invention, actual structure is not limited to this.So if this field Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.

Claims (4)

1. a kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick, it is characterised in that: the capillary wick is Based on Dual-Aperture Porous media structure, comprising: fiber (1), foam metal skeleton (2), fiber hole (3) and foam metal matrix porosity (4)； Fiber (1) is distributed in foam metal skeleton (2) inside, and the fiber hole (3) of small-bore is formed between fiber (1), in foam gold The foam metal matrix porosity (4) of large aperture is formed between category skeleton (2).

2. a kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick according to claim 1, feature exist In: it is more than the foam metal material of 100W/mK that foam metal skeleton (2), which uses thermal conductivity,.

3. a kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick according to claim 1 or 2, special Sign is: foam metal skeleton (2) uses aperture for the foam metal material of 50-150um.

4. a kind of foam metal applied to loop circuit heat pipe-fiber composite capillary wick according to claim 3, feature exist In: fiber (1) uses draw ratio for 5-10, the metal material of length 10-40um.