CN105526817A - Sintering device and method capable of quantitatively controlling porosity parameters of capillary wick - Google Patents
Sintering device and method capable of quantitatively controlling porosity parameters of capillary wick Download PDFInfo
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- CN105526817A CN105526817A CN201510757176.6A CN201510757176A CN105526817A CN 105526817 A CN105526817 A CN 105526817A CN 201510757176 A CN201510757176 A CN 201510757176A CN 105526817 A CN105526817 A CN 105526817A
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- fixture block
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- drift
- capillary wick
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Abstract
The invention provides a sintering device and method capable of quantitatively controlling porosity parameters of a capillary wick. The sintering device comprises a punching head, clamping blocks, elastic connecting pieces and sleeves. The lower end of the punching head is arranged on the inner sides of the sleeves. Clamping block installing grooves are formed in the lower end of the punching head. The clamping blocks are connected with the groove bottoms of the clamping block installing grooves through the elastic connecting pieces. When each elastic connecting piece is compressed through the corresponding clamping block, the corresponding clamping block is contained in the corresponding clamping block installing groove. Clamping grooves matched with the clamping blocks are formed in the inner wall faces of the sleeves. When each clamping block is contained in the corresponding clamping block installing groove, the punching head can be inserted into the sleeves, and each clamping block can enter the corresponding clamping groove under the drive of the corresponding elastic connecting piece. The sintering device and method capable of quantitatively controlling the porosity parameters of the capillary wick can be applied to loop heat pipes and other products, and capillary wicks required by specified porosity parameters can be rapidly obtained in the processes of researching, developing, testing and producing. The sintering device and method have the characteristics of being low in cost, rapid, efficient and quantitative, and application prospects are wide.
Description
Technical field
The present invention relates to capillary wick, particularly, relate to a kind of can the sintering equipment of quantified controlling capillary wick porosity parameter and method.
Background technology
Loop circuit heat pipe (LoopHeatPipe, be called for short LHP) be a kind of by the capillary wick product capillary draft drive circuit operation in evaporimeter, Working fluid phase changing is utilized to carry out the high-efficiency heat transfer device of transferring heat, have that heat-transfer capability is strong, thermal resistance is low, isothermal is good, efficiency is high, movement-less part and the advantage such as transmission range is long, thus become the efficient apparatus of spacecraft thermal control and high heat flux dissipation from electronic devices.
Capillary wick is parts the most key in loop circuit heat pipe, and the capillary force that capillary wick produces is unique driving force that fluid circulates in the loop, and its parameter will directly affect the performance of loop circuit heat pipe performance; Meanwhile, capillary wick is the most unmanageable part and have the highest cost in each parts of loop circuit heat pipe, is also the key factor of restriction loop circuit heat pipe production domesticization.
Result of study shows, loose structure is run by capillary force suction working medium and then drive circuit, its aspiration depends on the size of loose structure total pore size volume, the speed of suction then increases along with the permeability of loose structure and the increase of the ratio of porosity and the increase of working medium density, therefore, when capillary wick size, working material are determined, the porosity of capillary wick is the key parameter of restriction capillary wick performance.
The method of powder metallurgy is a kind of conventional method preparing capillary wick, and the quality of sintering frock performance directly determines the various performance parameters of the rear capillary wick of sintering.At present, most research institution and unit mainly determine proportioning and the sintering parameter of agglomerated material by the method for test, sinter with common sintering equipment, there is the problems such as success rate is low, the cycle long, batch difference is large, repeatable difference in the capillary wick obtained, seriously constrains the production domesticization application of loop circuit heat pipe.
The present invention is on the basis of existing capillary wick sintering equipment, be optimized design, making it have can the advantage of quantified controlling to key parameters such as capillary wick porositys, and then solve the problems such as success rate in capillary wick sintering process is low, the cycle long, batch difference is large, repeatable difference, have the advantages that cost is low, quick, efficient, quantitative, application prospect is extensive.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of can the sintering equipment of quantified controlling capillary wick porosity parameter and method.The present invention can realize the quantified controlling to sintering capillary wick key parameter porosity, the products such as loop circuit heat pipe quick obtaining in research and development, development, test, production process can be applied to and specify the capillary wick of porosity parameter request, have the advantages that cost is low, quick, efficient, quantitative, application prospect is extensive.
What provide according to an aspect of the present invention can the sintering equipment of quantified controlling capillary wick porosity parameter, comprises drift, fixture block, Flexible Connector and sleeve;
Wherein, the bottom of drift is arranged on inside described sleeve; The bottom of described drift is provided with fixture block mounting groove, and described fixture block connects the bottom land of described fixture block mounting groove by described Flexible Connector; When compressing described Flexible Connector by fixture block, in described fixture block storage to described fixture block mounting groove;
The internal face of described sleeve is provided with the draw-in groove matched with described fixture block; When in fixture block storage to described fixture block mounting groove, described drift can insert in described sleeve, and described fixture block can enter described draw-in groove under described Flexible Connector drives.
Described drift is used for exerting pressure to the metal dust be filled in sleeve and being coordinated with draw-in groove by fixture block, carries out height h control the porous body of metal sintered formation.
Preferably, also securing member is comprised;
Described sleeve comprises the first sleeve and the second sleeve; Wherein, the lower end of the first sleeve is provided with spacer, and the lower end of the second sleeve is provided with the locating slot matched with described spacer;
Described first sleeve and the second sleeve are positioned by spacer and locating slot, and are undertaken being connected to form sleeve by securing member.
Preferably, described sleeve lining is provided with multiple draw-in groove be arranged in order vertically.
Preferably, described drift is provided with the radial groove be arranged in order vertically and the axial groove extended vertically;
Circumferentially, described radial groove is used for the instruction when the porous body of metal sintered formation carries out height h control to described radial groove.
Preferably, described sleeve lining is provided with one deck graphite bisque or one deck carbon film.
What provide according to another aspect of the present invention can the sintering method of quantified controlling capillary wick porosity parameter, described in employing can the sintering equipment of quantified controlling capillary wick porosity parameter, comprise the steps:
Step 1: calculate required the weight m and the height h that add metal dust, weigh the metal dust that heavy amount is m in the balance, be filled in sleeve;
Step 2: apply pressure to the fixture block of drift lower end, spring pressurized shrinks, and then makes fixture block be embedded among drift, and being vertically positioned in sleeve by drift, should stagger with draw-in groove position in sleeve in fixture block position;
Step 3: exert pressure to the upper surface of drift, when radial groove reaches desired depth requirement, stops exerting pressure, rotary punch makes fixture block to corresponding draw-in groove position, the original pressure of spring is discharged, and fixture block bullet in the draw-in groove in sleeve, and then obtains the height h calculated;
Step 4: described drift and sleeve are sintered in sintering furnace.
Preferably, step 5: after terminating, takes out described sintering equipment, removal of fastener, and the locating slot of the spacer of the second sleeve lower end and the first sleeve lower end is carried out horizontal separation, just can obtain the capillary wick meeting expection porosity parameter request.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention can be applicable to the products such as loop circuit heat pipe quick obtaining in research and development, development, test, production process and specifies the capillary wick of porosity parameter request, and have the advantages that cost is low, quick, efficient, quantitative, application prospect is extensive;
2, in the present invention, fixture block coordinates with draw-in groove, carries out height h and controls, realize the quantified controlling to porous body porosity to the porous body of metal sintered formation;
3, structure of the present invention is simple, rationally distributed, is easy to promote.
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 can the structural representation of sintering equipment of quantified controlling capillary wick porosity parameter in the present invention;
Fig. 2 is the structural representation of the first sleeve in the present invention;
Fig. 3 is the structural representation of the second sleeve in the present invention;
Fig. 4 is the structural representation of drift in the present invention;
Fig. 5 is a kind of view that in the present invention, drift is installed;
Fig. 6 is the another kind of view that in the present invention, drift is installed.
In figure:
1 is drift;
2 is the first sleeve;
3 is securing member;
4 is the second sleeve;
5 is fixture block;
6 is holddown spring;
7 is draw-in groove;
8 is locating slot;
Detailed description of the invention
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 distortion and improvement can also be made.These all belong to protection scope of the present invention.
Principle of the present invention is: the porosity of porous material can be determined by following formula:
Wherein, ε is porosity; V
porefor the volume in space in porous body; V
totalfor the overall volume of porous body.
V
total＝S×hV
pore＝V
total-V
solidV
solid＝m/ρ(2)
Wherein, S is the cross-sectional area of mould; H is the height of porous body; M is the material weight preparing porous body;
ρ is the density of porous body raw material;
Can be obtained by above-mentioned formula:
Because the density of porous materials and the cross-sectional area of frock are fixed value, therefore by the height of adjustment moulds of industrial equipment and raw-material weight, thus the capillary wick with predetermined porosity can be obtained.
Provided by the invention can the sintering equipment of quantified controlling capillary wick porosity parameter, comprise drift 1, first sleeve 2, second sleeve 4 and securing member 3, as shown in Figure 1.
Described drift 1 for exerting pressure to the metal dust be filled in sleeve, being shaped, and is coordinated with the draw-in groove in sleeve by the fixture block 5 of drift bottom, selects corresponding height h, and then realizes the quantified controlling to capillary wick porosity;
First sleeve 2 and the second sleeve 4 are positioned by spacer and locating slot, and adopt securing member 3 to be fixed, and form sleeve; Described sleeve is for filling metal dust, and sleeve lining is provided with the draw-in groove be arranged in order vertically, and the fixture block of described draw-in groove and drift bottom matches.
The fixture block 5 of drift 1 bottom is connected with drift body by holddown spring 6, pressure is applied with the fixture block 5 of hand to drift bottom, holddown spring 6 pressurized shrinks, and then make fixture block 5 be embedded in the fixture block mounting groove of drift, drift 1 is vertically positioned in sleeve, should stagger with draw-in groove position in sleeve in the position of fixture block 5, preferably in 90 ° of angles, and moved up and down in sleeve by drift 1; Move to after predetermined depth location until drift, the draw-in groove position of fixture block 5 to the correspondence of rotary punch, the original pressure of holddown spring 6 is discharged, and fixture block 5 bullet, in the draw-in groove in sleeve, carries out realization and fixes, specifically as shown in Figure 4.
Capillary wick for the ease of thermal sintering can the demoulding smoothly, and described sleeve lining is provided with one deck graphite bisque or one deck carbon film.
Provided by the invention can the sintering method of quantified controlling capillary wick porosity parameter, comprise the following steps:
Step 1: calculate required the weight m and the height h that add metal dust, weigh the metal dust that heavy amount is m in the balance, be filled in sleeve.
Step 2: apply pressure to the fixture block of drift lower end with hand, spring pressurized shrinks, and then makes fixture block be embedded among drift, and it be vertically positioned in sleeve, fixture block position should be 90 ° of angles with draw-in groove position in sleeve.
Step 3: adopt the upper surface of forcing press to drift to exert pressure, wherein, direction of exerting pressure will keep vertical with the upper surface of drift, and uniform speed slow applies pressure; When radial groove reaches desired depth requirement, stop exerting pressure, rotary punch is to corresponding draw-in groove position, and the original pressure of spring is discharged, and fixture block bullet in the draw-in groove in sleeve, and then obtains the height h calculated;
Step 4: arrange sintering parameter, sinters in sintering furnace;
Step 5: after terminating, take out sintering frock, remove 4 securing members, the locating slot of the spacer of the second sleeve 4 lower end and the first sleeve 2 lower end is carried out horizontal separation, and take out the first sleeve 2 and the second sleeve 4, just can obtain the capillary wick meeting expection porosity parameter request;
Step 6: following process and test.
The present invention can be applicable to the products such as loop circuit heat pipe quick obtaining in research and development, development, test, production process and specifies the capillary wick of porosity parameter request, and have the advantages that cost is low, quick, efficient, quantitative, application prospect is extensive.
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 various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (7)
1. can the sintering equipment of quantified controlling capillary wick porosity parameter, it is characterized in that, comprise drift (1), fixture block (5), Flexible Connector and sleeve;
Wherein, the bottom of drift (1) is arranged on inside described sleeve; The bottom of described drift is provided with fixture block mounting groove, and described fixture block (5) connects the bottom land of described fixture block mounting groove by described Flexible Connector; When compressing described Flexible Connector by fixture block (5), in described fixture block (5) storage to described fixture block mounting groove;
The internal face of described sleeve is provided with the draw-in groove matched with described fixture block (5); When in fixture block (5) storage to described fixture block mounting groove, described drift (1) can insert in described sleeve, and described fixture block (5) can enter described draw-in groove under described Flexible Connector drives;
Described drift (1), for exerting pressure to the metal dust be filled in sleeve and being coordinated with draw-in groove by fixture block (5), is carried out height h to the porous body of metal sintered formation and controls.
2. according to claim 1 can the sintering equipment of quantified controlling capillary wick porosity parameter, it is characterized in that, also comprise securing member (3);
Described sleeve comprises the first sleeve (2) and the second sleeve (4); Wherein, the lower end of the first sleeve (2) is provided with spacer, and the lower end of the second sleeve (4) is provided with the locating slot matched with described spacer;
Described first sleeve (2) and the second sleeve (4) are positioned by spacer and locating slot, and are undertaken being connected to form sleeve by securing member (3).
3. according to claim 1 can the sintering equipment of quantified controlling capillary wick porosity parameter, it is characterized in that, described sleeve lining is provided with multiple draw-in groove be arranged in order vertically.
4. according to claim 1 can the sintering equipment of quantified controlling capillary wick porosity parameter, it is characterized in that, described drift (1) is provided with the radial groove be arranged in order vertically and the axial groove extended vertically;
Circumferentially, described radial groove is used for the instruction when the porous body of metal sintered formation carries out height h control to described radial groove.
5. according to claim 1 can the sintering equipment of quantified controlling capillary wick porosity parameter, it is characterized in that, described sleeve lining is provided with one deck graphite bisque or one deck carbon film.
6. can the sintering method of quantified controlling capillary wick porosity parameter, it is characterized in that, adopt described in any one of claim 1 to 5 can the sintering equipment of quantified controlling capillary wick porosity parameter, comprise the steps:
Step 1: calculate required the weight m and the height h that add metal dust, weigh the metal dust that heavy amount is m in the balance, be filled in sleeve;
Step 2: apply pressure to the fixture block of drift lower end, spring pressurized shrinks, and then makes fixture block be embedded among drift, and being vertically positioned in sleeve by drift, should stagger with draw-in groove position in sleeve in fixture block position;
Step 3: exert pressure to the upper surface of drift, when radial groove reaches desired depth requirement, stops exerting pressure, rotary punch makes fixture block to corresponding draw-in groove position, the original pressure of spring is discharged, and fixture block bullet in the draw-in groove in sleeve, and then obtains the height h calculated;
Step 4: described drift and sleeve are sintered in sintering furnace.
7. according to claim 6 can the sintering method of quantified controlling capillary wick porosity parameter, it is characterized in that, step 5: after terminating, take out described sintering equipment, removal of fastener, the locating slot of the spacer of the second sleeve (4) lower end and the first sleeve (2) lower end is carried out horizontal separation, just can obtain the capillary wick meeting expection porosity parameter request.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757176.6A CN105526817B (en) | 2015-11-09 | 2015-11-09 | Can quantified controlling capillary wick porosity parameter sintering equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757176.6A CN105526817B (en) | 2015-11-09 | 2015-11-09 | Can quantified controlling capillary wick porosity parameter sintering equipment and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105526817A true CN105526817A (en) | 2016-04-27 |
| CN105526817B CN105526817B (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510757176.6A Active CN105526817B (en) | 2015-11-09 | 2015-11-09 | Can quantified controlling capillary wick porosity parameter sintering equipment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776099A (en) * | 2018-09-05 | 2018-11-09 | 中国科学院工程热物理研究所 | Simultaneously measure capillary pressure, permeability and capillary performance parameter method and device |
| CN112179189A (en) * | 2020-09-28 | 2021-01-05 | 北京空间飞行器总体设计部 | Capillary core processing and forming method, capillary core and evaporator for loop heat pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201297856Y (en) * | 2008-12-05 | 2009-08-26 | 西北有色金属研究院 | A burning boat for loose sintering |
| US20090257905A1 (en) * | 2007-11-14 | 2009-10-15 | Miba Sinter Austria Gmbh | Compacting Tool |
| CN203887228U (en) * | 2014-06-06 | 2014-10-22 | 济南大学 | Mold for preparing powder metallurgy sintering materials of various ratios |
| CN203972863U (en) * | 2014-07-03 | 2014-12-03 | 厦门理工学院 | A kind of sectional mould for discharge plasma sintering |
-
2015
- 2015-11-09 CN CN201510757176.6A patent/CN105526817B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090257905A1 (en) * | 2007-11-14 | 2009-10-15 | Miba Sinter Austria Gmbh | Compacting Tool |
| CN201297856Y (en) * | 2008-12-05 | 2009-08-26 | 西北有色金属研究院 | A burning boat for loose sintering |
| CN203887228U (en) * | 2014-06-06 | 2014-10-22 | 济南大学 | Mold for preparing powder metallurgy sintering materials of various ratios |
| CN203972863U (en) * | 2014-07-03 | 2014-12-03 | 厦门理工学院 | A kind of sectional mould for discharge plasma sintering |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776099A (en) * | 2018-09-05 | 2018-11-09 | 中国科学院工程热物理研究所 | Simultaneously measure capillary pressure, permeability and capillary performance parameter method and device |
| CN112179189A (en) * | 2020-09-28 | 2021-01-05 | 北京空间飞行器总体设计部 | Capillary core processing and forming method, capillary core and evaporator for loop heat pipe |
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| Publication number | Publication date |
|---|---|
| CN105526817B (en) | 2017-12-22 |
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