CN102601372A - Strengthened condensation heat transfer tube and preparation method of Strengthened condensation heat transfer tube - Google Patents
Strengthened condensation heat transfer tube and preparation method of Strengthened condensation heat transfer tube Download PDFInfo
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- CN102601372A CN102601372A CN201210078779XA CN201210078779A CN102601372A CN 102601372 A CN102601372 A CN 102601372A CN 201210078779X A CN201210078779X A CN 201210078779XA CN 201210078779 A CN201210078779 A CN 201210078779A CN 102601372 A CN102601372 A CN 102601372A
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Abstract
The invention discloses a strengthened condensation heat transfer tube and a preparation method of the strengthened condensation heat transfer tube, which belongs to the technical field of heat transfer equipment. The strengthened condensation heat transfer tube comprises a metal tube and a porous layer bonded on the surface of the metal tube. The porous layer and the metal tube are sintered as a whole through solid phase. The preparation method comprises the preparation of the metal tube, the preparation of the porous layer and high temperature sintering. Compared with the prior art, the strengthened condensation heat transfer tube prepared has the advantages of simple preparation method, large capillary force of the porous layer on the surface and controllable porosity and permeability and the like and is easy to meet requirements of industrialized application.
Description
Technical field
The present invention relates to the augmentation of heat transfer technology, relate in particular to a kind of enforcing condensation heat transfer pipe and preparation method thereof.
Background technology
Along with the development of industrial technology, intensify heat transfer pipe is widely used in all kinds of heat transmission equipments.Especially used condenser in the Refrigeration & Air-Conditioning system; Steam in pipe is outer when condensing phase-change heat-exchange thermal resistance quite even greater than forced-convection heat transfer thermal resistance in managing; Therefore, the outer condensation heat transfer of enhanced tube can play significant effect for the heat transfer property that improves condenser etc.The porous surface enhanced tube is a kind of heat exchanger tube of the efficient augmentation of heat transfer that grows up the end of the sixties, and its surface can keep efficient heat transfer under the lower temperature difference, have the advantages such as anti-blocking ability that high critical heat flux density is become reconciled.Porous surface all has significant invigoration effect to the condensing heat-exchange of multiple working medium such as water, freon, ethanol, oil.High flux heat exchanger tube with porous surface is used for various heat transfer process with phase transformation with its good condensing heat-exchange performance; Like vaporizer, condenser etc.; Along with improving constantly of scientific and technological level; Heat pipe research and the field of using also will constantly be widened, and be with a wide range of applications in fields such as oil, metallurgy, refrigeration.
Show that according to the surface condensation enhanced heat transfer mechanism heat transfer property of enforcing condensation heat transfer pipe depends primarily on the pipe external structure.The outer mechanism of the pipe of screen type can obtain higher capillary force and higher capillary rise height, but because of permeability is lower, liquid backflow resistance is bigger, and the axial heat conduction ability of heat-transfer pipe is restricted.Its manufacturing is numerous and diverse in addition, production efficiency is low, because silk screen and tube wall loose contact cause bigger radially thermal resistance, process repeatability is poor, so in elongated micro heat pipe, replaced by other structure gradually.
Though outer its heat-transfer capability of finned heat-transfer pipe is relatively good, shortcoming is also fairly obvious, and it requires very high to the degree of depth and the angle of fin; And its directionality is very strong, and when big bending appearred in heat-transfer pipe, the characteristic of external finned tube directionality had just become fatal shortcoming; Cause heat conductivility to descend significantly, in addition, its processing is difficulty relatively; Tool wear is more serious in the process, the more high shortcoming of processing cost, and on using, received certain restriction.
Summary of the invention
In order to overcome the shortcoming and defect of prior art, the present invention provides a kind of enforcing condensation heat transfer pipe and preparation method thereof, and its technology is simple, has advantages such as high capillary force, high pass heat, low thermal resistance.
Technical scheme of the present invention:
A kind of preparation method of enforcing condensation heat transfer pipe, following steps:
(1) prepares a metal tube, and oil removing is cleaned on the metal tube surface;
(2) prepare two plugs, this plug is the jacket-type plug, and it has body;
(3) preparation of porous layer; Two outer ends of being inserted in metal tube respectively with the body of plug; Metal tube is put into corresponding sintering mold; Metal tube is because of the support of body, makes between the inner surface of outer surface and sintering mold of metal tube and forms toroidal cavity, then metal dust inserted in this toroidal cavity;
(4) high temperature sintering is put into the sintering furnace sintering with sintering mold, opens sintering mold after cooling to room temperature with the furnace, removes the two ends plug condenser pipe that promptly strengthened.
The inwall of the said body of above-mentioned steps (2) and the outer wall matched in clearance of metal tube, the outer wall of body and sintering mold matched in clearance;
The material of the used sintering mold of above-mentioned steps (3) is a kind of in graphite or the stainless steel.
Above-mentioned steps (3) metal dust is that particle diameter is a 100-300 purpose copper powder particles, and preferably particle diameter is a 100-300 purpose red copper powder particle.
Above-mentioned steps (4) high temperature sintering, sintering temperature is 800～1000 ℃, sintering time is 30～90min.
The resulting a kind of enforcing condensation heat transfer pipe of above-mentioned preparation method, this enforcing condensation heat transfer pipe comprise metal tube and are combined in its surperficial porous layer that said porous layer is that 100-300 purpose copper powder particles and metal tube become one through solid-phase sintering.
Said metal tube external diameter is 3mm～16mm, wall thickness 0.1mm～1mm; Metal tube is any one in copper, aluminium, the stainless steel; For reaching desirable heat-transfer effect, metal tube preferably adopts red copper.
Said porous layer thickness is 0.1mm～1.5mm.Said metal tube length is 160mm～300mm.
Compared with prior art, the invention has the beneficial effects as follows:
1. the employing porous layer heat exchange of the present invention's employing, porous layer has higher capillary suction force, the advantage of high pass heat and low thermal resistance.
2. the present invention has adopted red copper powder particle (spheric granules) sintering to form the porous layer surface texture, and the material of porous layer can be identical with the material of metal tube, and the mechanical strength of metal tube is constant basically, and has better heat transfer property.
3. the sintering method of the present invention's employing can satisfy the requirement of industrial applications, and the technology simple possible can realize producing in batches, and efficient is high, and cost is low.
4, technological means of the present invention is simple and easy to do, and is with low cost, easy to utilize.
Description of drawings
Fig. 1 is an enforcing condensation heat transfer tubular construction sketch map of the present invention.
Fig. 2 is enforcing condensation heat transfer pipe partial structurtes of the present invention sketch map in kind.
Fig. 3 is a sintering mold structural representation used herein.
Fig. 3 a is the schematic cross-section of Fig. 3.
Fig. 4 is equipped with the process sketch map for enforcing condensation heat transfer control of the present invention.
The specific embodiment
Following specific embodiments of the invention is done further detailed explanation, but embodiment of the present invention is not limited thereto.
Fig. 1 is the enforcing condensation heat transfer pipe, and this enforcing condensation heat transfer pipe comprises metal tube 1 and be combined in its surperficial porous layer 2, and said porous layer 2 becomes one through solid-phase sintering for 100-300 purpose copper powder particles and metal tube 1.Said porous layer 2 thickness are 0.1mm～1.5mm.Said metal tube 1 length is 160mm～300mm.
As shown in Figure 4.The preparation method of above-mentioned enforcing condensation heat transfer pipe is following:
(1) prepares a metal tube 1, and oil removing is cleaned on metal tube 1 surface; Purpose is to guarantee that metal dust (copper powder particles preferably adopts the red copper powder particle) contacts with the good of its outer surface, also helps sintering process metal dust and surperficial combining.
(2) prepare two plugs 3, this plug 3 is the jacket-type plug, and it has body 3-1;
(3) preparation of porous layer 2; Two outer ends of being inserted in metal tube 1 respectively with the body 3-1 of plug 3; Metal tube 1 is put into corresponding sintering mold 4; Metal tube 1 is because of the support of body 3-1, makes between the inner surface of outer surface and sintering mold 4 of metal tube 1 and forms toroidal cavity, then metal dust inserted in this toroidal cavity; For guaranteeing the even of metal dust, can in filling process, ceaselessly shake whole sintering mold 4.Sintering mold 4 can be to be prone to the demoulding and resistant to elevated temperatures metal tube, or the pipe box of being processed by graphite or stainless steel;
(4) high temperature sintering is put into the sintering furnace sintering with sintering mold 4, opens sintering mold 4 after cooling to room temperature with the furnace, removes two ends plug 3, and condenser pipe is promptly strengthened.This moment, metal dust formed porous layer 2 because of sintering, and porous layer 2 combines because of sintering with the outer surface of metal tube 1 again.
The inwall of the said body 3-1 of above-mentioned steps (2) and the outer wall matched in clearance of metal tube 1, the outer wall of body 3-1 and sintering mold matched in clearance;
The material of the used sintering mold 4 of above-mentioned steps (3) is a kind of in graphite or the stainless steel.
Above-mentioned steps (3) metal dust is that particle diameter is 100～300 purpose copper powder particles, preferably adopts the red copper powder particle.
Above-mentioned step (4) high temperature sintering of stating, sintering temperature are 800～1000 ℃ (general about 950 ℃), and sintering time is 30～90min (perhaps about 60min).
The enforcing condensation heat transfer pipe that the present invention proposes has better heat transfer property.Have higher capillary suction force, and improved radially thermal resistance significantly, have the advantage of high hot biography amount, low thermal resistance.Its heat transfer potential is strong, and the heat transfer potential influence after bending is little, meets the development trend of electronic device chip high integration.Its porous surface layer of this enforcing condensation heat transfer pipe is suitable for operation under cryogenic conditions, is suitable for using the refrigerant heat transfer process especially.
The enforcing condensation heat transfer pipe has adopted red copper, and red copper has higher heat transfer coefficient, and surface texture has identical material with body, thereby does not change the mechanical strength of pipe; The sintered type honeycomb sandwich has higher capillary force, has improved the heat transfer property of pipe.Advantage such as the porosity of porous layer 2, permeability are controlled satisfies the requirement of industrial applications easily.
Just can realize this patent preferably as stated.The above is merely preferred embodiment of the present invention, can not limit the scope that the present invention implements with this, and the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that patent of the present invention contains.
Claims (10)
1. the preparation method of an enforcing condensation heat transfer pipe is characterized in that following steps:
(1) prepares a metal tube, and oil removing is cleaned on the metal tube surface;
(2) prepare two plugs, this plug is the jacket-type plug, and it has body;
(3) preparation of porous layer; Two outer ends of being inserted in metal tube respectively with the body of plug; Metal tube is put into corresponding sintering mold; Metal tube is because of the support of body, makes between the inner surface of outer surface and sintering mold of metal tube and forms toroidal cavity, then metal dust inserted in this toroidal cavity;
(4) high temperature sintering is put into the sintering furnace sintering with sintering mold, opens sintering mold after cooling to room temperature with the furnace, removes the two ends plug condenser pipe that promptly strengthened.
2. the preparation method of enforcing condensation heat transfer pipe according to claim 1 is characterized in that, the inwall of the said body of step (2) and the outer wall matched in clearance of metal tube, the outer wall of body and sintering mold matched in clearance.
3. the preparation method of enforcing condensation heat transfer pipe according to claim 2 is characterized in that, the material of the used sintering mold of step (3) is any one in graphite or the stainless steel.
4. the preparation method of enforcing condensation heat transfer pipe according to claim 3 is characterized in that, step (3) metal dust is that particle diameter is a 100-300 purpose copper powder particles.
5. the preparation method of enforcing condensation heat transfer pipe according to claim 3 is characterized in that, metal dust is that particle diameter is a 100-300 purpose red copper powder particle.
6. the preparation method of enforcing condensation heat transfer pipe according to claim 5 is characterized in that, said step (4) high temperature sintering, and sintering temperature is 800～1000 ℃, sintering time is 30～90min.
7. according to the resulting a kind of enforcing condensation heat transfer pipe of each preparation method in the claim 1～6; It is characterized in that; This enforcing condensation heat transfer pipe comprises metal tube and is combined in its surperficial porous layer that said porous layer is that 100-300 purpose copper powder particles and metal tube become one through solid-phase sintering.
8. the resulting a kind of enforcing condensation heat transfer pipe of preparation method according to claim 7 is characterized in that said metal tube external diameter is 3mm～16mm, wall thickness 0.1mm～1mm; Metal tube is any one in copper, aluminium, the stainless steel.
9. the resulting a kind of enforcing condensation heat transfer pipe of preparation method according to claim 8 is characterized in that said porous layer thickness is 0.1mm～1.5mm.
10. the resulting a kind of enforcing condensation heat transfer pipe of preparation method according to claim 9 is characterized in that said metal tube length is 160mm～300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210078779XA CN102601372A (en) | 2012-03-22 | 2012-03-22 | Strengthened condensation heat transfer tube and preparation method of Strengthened condensation heat transfer tube |
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| CN201210078779XA CN102601372A (en) | 2012-03-22 | 2012-03-22 | Strengthened condensation heat transfer tube and preparation method of Strengthened condensation heat transfer tube |
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| CN102601372A true CN102601372A (en) | 2012-07-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335809A (en) * | 2017-07-05 | 2017-11-10 | 江苏萃隆精密铜管股份有限公司 | The preparation method of the evaporation tube of flooded evaporator |
| WO2018218943A1 (en) * | 2017-06-01 | 2018-12-06 | 曙光节能技术（北京）股份有限公司 | Method for enhancing boiling performance of chip surface |
| CN108971498A (en) * | 2018-08-28 | 2018-12-11 | 佛山市宝粤美科技有限公司 | A kind of production method of powdered metal frame |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018218943A1 (en) * | 2017-06-01 | 2018-12-06 | 曙光节能技术（北京）股份有限公司 | Method for enhancing boiling performance of chip surface |
| US11452239B2 (en) * | 2017-06-01 | 2022-09-20 | Sugon Dataenergy(Beijing) Co., Ltd | Method for enhancing boiling performance of chip surface |
| CN107335809A (en) * | 2017-07-05 | 2017-11-10 | 江苏萃隆精密铜管股份有限公司 | The preparation method of the evaporation tube of flooded evaporator |
| CN108971498A (en) * | 2018-08-28 | 2018-12-11 | 佛山市宝粤美科技有限公司 | A kind of production method of powdered metal frame |
| CN108971498B (en) * | 2018-08-28 | 2020-11-03 | 徐州融创达电子科技有限公司 | Manufacturing method of powder metallurgy metal frame |
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Application publication date: 20120725 |