CN114812235A - Reducing heat pipe and manufacturing method thereof - Google Patents
Reducing heat pipe and manufacturing method thereof Download PDFInfo
- Publication number
- CN114812235A CN114812235A CN202110529738.7A CN202110529738A CN114812235A CN 114812235 A CN114812235 A CN 114812235A CN 202110529738 A CN202110529738 A CN 202110529738A CN 114812235 A CN114812235 A CN 114812235A
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- Prior art keywords
- heat pipe
- diameter
- heat
- reducing
- manufacturing
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 13
- 230000008859 change Effects 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a variable diameter heat pipe and a manufacturing method thereof, wherein working medium in the heat pipe is vaporized by heating, the vaporized gas expands, pressure difference exists between the inside and the outside of the heat pipe to drive the deformation of a heat pipe shell, and further variable diameter heat pipes with different diameters can be obtained according to actual needs; the invention can realize the maximum 100 percent of diameter change, and simultaneously the diameter increasing end of the heat pipe can effectively increase the contact area between the heat pipe and a heat source, and can also increase the heat flow cooling area to realize the purpose of high-efficiency heat dissipation, thereby achieving the purpose of diameter change and simultaneously improving the power of the heat pipe.
Description
Technical Field
The invention relates to a technology for manufacturing a variable-diameter heat pipe, in particular to a variable-diameter heat pipe and a manufacturing method thereof.
Background
The heat pipe efficiently transfers heat through liquid-vapor phase change, has excellent characteristics of extremely high heat conductivity, excellent isothermal property, heat flow density variability, heat flow direction reversibility, constant temperature property, environmental adaptability and the like, can meet the requirements of electronic equipment on compactness, reliability, high controllability, high heat conductivity, convenience in maintenance and the like of a heat dissipation device, and can realize the purpose of efficiently and rapidly dissipating heat of components with larger heat productivity in the fields of aviation, aerospace, nuclear industry, large-scale integrated circuits and the like. However, the pipe diameter of the traditional heat pipe is generally not changed, the application in a complex heat dissipation environment is limited, the variable diameter heat pipes with different pipe diameters can increase the contact area between the heat pipe and a heat source, and meanwhile, the space and the layout are more flexible under the condition that the heat dissipation performance is not changed, so that in the complex heat dissipation environment, compared with the traditional heat pipe with the unchanged pipe diameter, the variable diameter heat pipes have more flexible heat dissipation arrangement, and the heat dissipation requirements of components and parts in the complex heat dissipation environment can be met.
The manufacturing method of the reducing heat pipe generally comprises 2 steps:
1. the method needs to increase the flaring/necking process, increases the working procedures and increases the cost.
For example, patent application No. 201810721113.9 discloses a flared heat pipe and method of making the same. The invention also discloses a manufacturing method of the flaring heat pipe. The flaring heat pipe provided by the invention increases the flaring process, so the cost is increased.
2. The method needs to add connecting pieces between the heat pipes with different pipe diameters, and the process is complex.
The invention patent with the application number of 201911195126.8 discloses a variable diameter channel heat pipe which is characterized by comprising a plurality of axial channel heat pipes with different cross-sectional sizes and a plurality of variable diameter joints with different sizes. And connecting a plurality of heat pipes with different sections into a special-shaped heat pipe with an internal axial channel and a steam channel communicated with each other. The processed cylindrical ends of the heat pipe shells with the axial channels are respectively inserted into the reducing joints, the number of the heat pipe connecting ports is large, the process is complex, and the processing difficulty is increased indirectly.
(II) technical scheme
The invention is realized by the following technical scheme: the invention provides a method for manufacturing a variable-diameter heat pipe, which comprises the following manufacturing steps:
step one, preparing a heat pipe with a certain diameter according to a conventional process;
step two, putting the heat pipe prepared in the step one into a reducing mould, wherein the diameter of the heat pipe is consistent with the diameter of a mould groove with the smallest diameter in the reducing mould;
step three, putting the reducing mould provided with the heat pipe into an atmosphere heating furnace, heating to a certain temperature according to a certain heating rate, and preserving heat for a certain time;
step four, cooling the furnace to room temperature, and taking the reducing mold provided with the heat pipe out of the atmosphere heating furnace;
and step five, taking out the reducing heat pipe in the reducing mold.
Further, the diameter of the heat conduction pipe in the first step is in the range of D2mm-D10 mm.
Furthermore, in the second step, the reducing die can be made of one of stainless steel, graphite or copper, and the reducing die can be single-stage reducing or multi-stage reducing.
Further, the atmosphere gas in the atmosphere heating furnace in the third step is hydrogen-nitrogen protective gas, the heating rate is 5-15 ℃/min, the heating temperature range is 100-500 ℃, and the heat preservation time is 120-2000 s.
The other technical scheme of the invention is as follows: namely the variable diameter heat pipe prepared by the method.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a process method which can process heat pipes with various diameters into variable-diameter heat pipes through specific moulds and conditions, working medium in the heat pipes is vaporized through heating, vaporized gas expands, pressure difference exists between the inside and the outside of the heat pipes to drive pipe shells of the heat pipes to deform, and then variable-diameter heat pipes with different diameters can be obtained according to actual needs, and the prepared variable-diameter heat pipes have various and controllable shapes and have the advantages of simple processing process, lower cost and the like; the invention can realize the maximum 100 percent of diameter change, and simultaneously the diameter increasing end of the heat pipe can effectively increase the contact area between the heat pipe and a heat source, and can also increase the heat flow cooling area to realize the purpose of high-efficiency heat dissipation, thereby achieving the purpose of diameter change and simultaneously improving the power of the heat pipe.
Drawings
FIG. 1 is a schematic view of a variable diameter heat pipe manufactured in example 1.
FIG. 2 is a schematic view of the reducing heat pipe manufactured in example 2.
FIG. 3 is a schematic view of the reducing heat pipe manufactured in example 3.
FIG. 4 is a schematic view of the reducing heat pipe manufactured in example 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A reducing heat pipe and a manufacturing method thereof are realized by the following steps:
1. manufacturing a heat pipe with the diameter D2mm according to a conventional process;
2. placing the heat pipe in a D2mm-D4mm reducing die;
3. putting the mould into an atmosphere heating furnace, heating to 400 ℃ according to the heating rate of 15 ℃/min, and preserving the temperature for 1800 seconds;
4. then taking out the die from the furnace after the die is cooled, wherein the local diameter can be changed into D4mm, as shown in figure 1;
5. testing the heat dissipation power of the heat pipe, wherein the testing power is 3W before diameter changing and the temperature difference is within 5 ℃; after reducing, the power is tested to be 5W, and within 5 ℃ of temperature difference, the power is increased by 60 percent.
Example 2
A reducing heat pipe and a manufacturing method thereof are realized by the following steps:
1. manufacturing a heat pipe with the diameter D6mm according to a conventional process;
2. placing the heat pipe in a D6mm-D8mm reducing die;
3. putting the mould into a heating furnace, heating to 300 ℃ according to the heating rate of 10 ℃/min, and preserving heat for 1200 seconds;
4. then taking out the die from the furnace after the die is cooled, wherein the local diameter can be changed into D8mm, as shown in figure 2;
5. testing the heat dissipation power of the heat pipe, wherein the testing power before diameter change is 15W, and the temperature difference is within 5 ℃; after reducing, the test power is 20W, and the power is increased by 33 percent within 5 ℃ of temperature difference.
Example 3
A reducing heat pipe and a manufacturing method thereof are realized by the following steps:
1. manufacturing a heat pipe with the diameter D8mm according to a conventional process;
2. placing the heat pipe in a D8mm-D9mm reducing die;
3. putting the mould into a heating furnace, heating to 300 ℃ according to the heating rate of 5 ℃/min, and preserving heat for 800 seconds;
4. then taking out the die from the furnace after the die is cooled, wherein the local diameter can be changed into D9mm, as shown in figure 3;
5. testing the heat dissipation power of the heat pipe, wherein the testing power before diameter change is 30W, and the temperature difference is within 5 ℃; after reducing, the test power is 40W, and the power is increased by 33 percent within 5 ℃ of temperature difference.
Example 4
A reducing heat pipe and a manufacturing method thereof are realized by the following steps:
1. manufacturing a heat pipe with the diameter D8mm according to a conventional process;
2. placing the heat pipe in a D8mm-D9mm-D10mm multistage reducing die;
3. putting the mould into a heating furnace, heating to 350 ℃ according to the heating rate of 5 ℃/min, and preserving the temperature for 900 seconds;
4. then taking out the die from the furnace after the die is cooled, wherein the local diameter can be changed into D9mm and D10mm, as shown in FIG. 4;
5. testing the heat dissipation power of the heat pipe, wherein the testing power before diameter change is 40W, and the temperature difference is within 5 ℃; after reducing, the power is tested to be 55W, and within 5 ℃ of temperature difference, the power is increased by 37.5 percent.
Through the embodiments 1-4, the working medium in the heat pipe is vaporized by heating, the vaporized gas expands, pressure difference exists between the inside and the outside of the heat pipe to drive the pipe shell of the heat pipe to deform, and then the variable diameter heat pipes with different diameters can be obtained according to actual needs.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (5)
1. A method for manufacturing a variable-diameter heat pipe is characterized by comprising the following steps: the method comprises the following manufacturing steps:
step one, preparing a heat pipe with a certain diameter according to a conventional process;
step two, putting the heat pipe prepared in the step one into a reducing mould, wherein the diameter of the heat pipe is consistent with the diameter of a mould groove with the smallest diameter in the reducing mould;
step three, putting the reducing mould provided with the heat pipe into an atmosphere heating furnace, heating to a certain temperature according to a certain heating rate, and preserving heat for a certain time;
step four, cooling the furnace to room temperature, and taking the reducing mold provided with the heat pipe out of the atmosphere heating furnace;
and step five, taking out the reducing heat pipe in the reducing mold.
2. The method for manufacturing a variable diameter heat pipe according to claim 1, wherein: the diameter range of the heat conducting pipe in the first step is D2mm-D10 mm.
3. The method for manufacturing a variable diameter heat pipe according to claim 1, wherein: in the second step, the reducing die can be made of one of stainless steel, graphite or copper, and can be single-stage reducing or multi-stage reducing.
4. The method of claim 1, wherein the step of forming the heat pipe comprises: the atmosphere gas in the atmosphere heating furnace in the third step is hydrogen-nitrogen protective gas, the heating rate is 5 ℃/min to 15 ℃/min, the heating temperature interval is 100 ℃ to 500 ℃, and the heat preservation time is 120s to 2000 s.
5. A variable diameter heat pipe manufactured by the method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110529738.7A CN114812235A (en) | 2021-05-14 | 2021-05-14 | Reducing heat pipe and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110529738.7A CN114812235A (en) | 2021-05-14 | 2021-05-14 | Reducing heat pipe and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114812235A true CN114812235A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110529738.7A Pending CN114812235A (en) | 2021-05-14 | 2021-05-14 | Reducing heat pipe and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN114812235A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130617A (en) * | 1977-12-30 | 1978-12-19 | Airco, Inc. | Method of making endotracheal tube cuffs |
| JPH10314829A (en) * | 1997-05-15 | 1998-12-02 | Hitachi Cable Ltd | Heat transfer tube for high-temperature heat pipe and manufacture of tube |
| JPH11201672A (en) * | 1998-01-12 | 1999-07-30 | Furukawa Electric Co Ltd:The | Manufacture of heat pipe |
| JP2002022381A (en) * | 2000-07-04 | 2002-01-23 | Hitachi Cable Ltd | Processing method for heat pipe |
| JP2002280504A (en) * | 2001-03-16 | 2002-09-27 | Furukawa Electric Co Ltd:The | Method for manufacturing heat sink by thermal pipe enlarging process |
| CN111076586A (en) * | 2019-11-28 | 2020-04-28 | 北京空间机电研究所 | Variable diameter channel heat pipe and connecting method thereof |
-
2021
- 2021-05-14 CN CN202110529738.7A patent/CN114812235A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130617A (en) * | 1977-12-30 | 1978-12-19 | Airco, Inc. | Method of making endotracheal tube cuffs |
| JPH10314829A (en) * | 1997-05-15 | 1998-12-02 | Hitachi Cable Ltd | Heat transfer tube for high-temperature heat pipe and manufacture of tube |
| JPH11201672A (en) * | 1998-01-12 | 1999-07-30 | Furukawa Electric Co Ltd:The | Manufacture of heat pipe |
| JP2002022381A (en) * | 2000-07-04 | 2002-01-23 | Hitachi Cable Ltd | Processing method for heat pipe |
| JP2002280504A (en) * | 2001-03-16 | 2002-09-27 | Furukawa Electric Co Ltd:The | Method for manufacturing heat sink by thermal pipe enlarging process |
| CN111076586A (en) * | 2019-11-28 | 2020-04-28 | 北京空间机电研究所 | Variable diameter channel heat pipe and connecting method thereof |
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