CN108871025A - A kind of flaring heat pipe and preparation method thereof - Google Patents
A kind of flaring heat pipe and preparation method thereof Download PDFInfo
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- CN108871025A CN108871025A CN201810721113.9A CN201810721113A CN108871025A CN 108871025 A CN108871025 A CN 108871025A CN 201810721113 A CN201810721113 A CN 201810721113A CN 108871025 A CN108871025 A CN 108871025A
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- 238000002360 preparation method Methods 0.000 title description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims 1
- 238000000137 annealing Methods 0.000 abstract description 6
- 238000010992 reflux Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- F28D15/04—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 with tubes having a capillary structure
- F28D15/046—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 with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of flaring heat pipes, including the hollow tube that a both ends seal, are injected with working media in hollow tube；Hollow tube includes bringing-up section, adiabatic section and radiating segment；The internal diameter of bringing-up section, adiabatic section and radiating segment is all the same；Adiabatic section is consistent with the outer diameter of radiating segment, and the outer diameter of bringing-up section is greater than the outer diameter of adiabatic section and radiating segment；The inner wall of bringing-up section is equipped with the first capillary structure, and the inner wall of adiabatic section and radiating segment is equipped with the second capillary structure；The thickness of first capillary structure is greater than the thickness of the second capillary structure.A kind of production method for being flared heat pipe is also disclosed in the present invention.In flaring heat pipe provided by the invention, the capillary structure thickness of bringing-up section is larger, and reflux cycle is accelerated in tube chamber, and heat transfer efficiency greatly promotes；It is part hollow at the necking after truncation, protective gas is able to enter in pipe when tail end welds, and is prevented weld high-temperature oxydation, be may not need annealing using punching mode.
Description
Technical field
The present invention relates to a kind of heat pipe, a kind of flaring heat pipe and preparation method thereof is concretely related to.
Background technique
At this stage, heat pipe is because it has the advantages that the electricity for being widely used in having larger calorific value compared with high heat transfer amount
In subcomponent.When the heat pipe works, fever electronics is absorbed in fire end using the low boiling point working media of tubular body filling
Carburation by evaporation after the heat that element generates, steam moves to radiating end with heat, and releases heat in radiating end liquefaction condensation
It runs out, to radiate to electronic component.Working media after the liquefaction is under the action of capillary structure of inner wall of heat pipe
It is back to evaporation part, continues carburation by evaporation and liquefaction condensation, makes working media in heat pipe internal circulation movement, by electronic component
The heat of generation endlessly distributes.The movement of general driving working media depends on：Amount of thermal conduction, capillary
Pipe pressure, in capillary for driving the resistance transmitance of the flow direction of working fluid.
In order to improve the heat conduction efficiency of heat pipe, many methods exist in the prior art.
For example, using the heat pipe of compound capillary structure.Application No. is disclose one in the invention of 201110333145.X
Kind heat pipe and preparation method thereof.The heat pipe includes a tube body, and the inboard wall of tube body has capillary structure, the capillary structure packet
Include the groove structure positioned at the pure powder sintered structure of heat pipe evaporator section and positioned at heat pipe insulation section and condensation segment, the pure powder
Sintering structure and the groove structure are coaxial.The heat pipe uses different capillary structures from condensation segment in evaporator section, utilizes
The advantage of different capillary structures respectively, improves the heat conductive efficiency of heat pipe.However, in above-mentioned heat pipe, due to each section of hair
Fine texture is different, and manufacture craft is more complicated.
Application No. is disclose a kind of heat pipe in 201220389132.4 utility model.The heat pipe includes tube body,
The tube body is in hollow form, and the tube body includes evaporation part and condensation part；The tubular body has compound capillary structure；It is described
Compound capillary structure is composite braided or embroidery structure.It is different from the structure of conventional metals net single plane, this composite construction can
With multi-heat source, different camber, shape, segment difference, thickness heat pipe, do optimized heat pipe design.Effectively promote heat pipe
Hot biography amount and antigravity.
Application No. is a kind of heat pipe and preparation method thereof is also disclosed in 02122090.5 patent of invention.The heat pipe
Including evaporation part, insulation part, condensation part and porous sintered powder capillary.For the degree of porosity and transmission for increasing capillary pipe structure object
Rate configures the porous of the different material for being suitble to respective requirement condition, shape or particle size in evaporation part, insulation part, condensation part
It is sintered powder capillary pipe structure.Another feature is, for the porous sintered powder capillary of configuration different material, image or particle size
Pipe structure, by this powder technique, gas cell distribution be it is double, thus heat pipe have radially, asymmetric end surface shape.
Above-mentioned heat pipe has been all made of compound capillary structure, and mainly by using different structure or the capillary material of type
Material can improve heat-conductive characteristic, but process is relative complex and production cost also will increase to realize to a certain extent.
Summary of the invention
In view of the deficiencies of the prior art, the invention proposes a kind of simple process, without annealing, lower production costs, lead
Heat pipe of good in thermal property and preparation method thereof.
The technical proposal for solving the technical problem of the invention is：A kind of flaring heat pipe, including both ends sealing
Hollow tube is injected with working media in the hollow tube；The hollow tube includes bringing-up section, adiabatic section and radiating segment；
The internal diameter of the bringing-up section, adiabatic section and radiating segment is all the same；The adiabatic section is consistent with the outer diameter of radiating segment, the bringing-up section
Outer diameter be greater than the adiabatic section and the radiating segment outer diameter；The inner wall of the bringing-up section is equipped with the first capillary structure, institute
The inner wall for stating adiabatic section and radiating segment is equipped with the second capillary structure；The thickness of first capillary structure is greater than described second mao
The thickness of fine texture.
Further, the proportional region of the length L3 of the length L1 and radiating segment of the bringing-up section is 1:1.5~1:
3。
Further, the outer diameter of the bringing-up section is 1.2~1.4 times of the outer diameter of the adiabatic section and radiating segment.
Further, first capillary structure and the second capillary structure are formed by metal powder sintered.
The present invention also provides a kind of production method for being flared heat pipe, the production method is mainly included the following steps that：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First hollow tube one is flared, the length of flared section is L1；Extremely by the other end necking of hollow tube
The half of hollow tube outer diameter（Tolerance is positive and negative 0.5mm）；
Step 3：The stainless steel round bar of certain size is inserted into the hollow tube of a necking；
Step 4：Metal powder is inserted in the hollow tube of insertion stainless steel round bar, powder is filled out and carries out high temperature sintering after the completion；
Step 5：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；One end of bringing-up section is carried out at necking
Reason；Certain length is reserved after necking（L2）Truncation length, using smelting tool to L2 part be truncated；
Step 6：Hollow tube after truncation is welded, pours into certain medium and vacuum-pumping and sealing into airtight cavity, shape
At heat pipe.
Further, the outer diameter of the flared section is 1.2~1.4 times of hollow tube outer diameter.
Further, the proportional region of the length L3 of the length L1 and radiating segment of the bringing-up section is 1:1.5~1:
3。
Further, it in the step 5, is truncated at the truncation length L2 using punching mode, cut through
There are the circular holes that diameter is 1~1.5mm at the section divided.
Further, it when carrying out the welding sequence in the step 6, is passed through by circular hole into hollow tube
Protective gas prevents weld high-temperature oxydation.
The beneficial effects of the invention are as follows：Compared with prior art, the flaring heat pipe of offer of the invention and its production side
Method mainly has following advantage：
1）By the way of the expander of one end, two kinds of capillary structures are introduced in heat pipe（Capillary thickness is different, internal diameter is identical）, add
The capillary thickness of hot arc is greater than radiating segment, and bringing-up section hair suction is strong when use, and reflux is fast, and heat-conductive characteristic is good；Especially negative
When being used under angle（Radiating segment is under, and bringing-up section is upper）, the suction of bringing-up section hair is strong, and reflux cycle is obvious, and heat transfer efficiency obviously mentions
It rises；
2）Reserve truncation part after bringing-up section necking, when truncation uses punching mode, and truncation surface is 1~1.5mm's there are diameter
Circular hole；When welding, protective gas is passed through into hollow tube by circular hole, prevents weld high-temperature oxydation, it can be with
Without annealing, production technology is simplified, production cost is reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for being flared heat pipe.
Fig. 2 is the diagrammatic cross-section for being flared heat pipe.
Fig. 3 is the production process schematic diagram for being flared heat pipe.
Wherein, 1- bringing-up section；The adiabatic section 2-；3- radiating segment；4- circular hole；The first capillary structure of 5-；The second capillary of 6-
Structure.In Fig. 2, dotted arrow represents the trend of heat, and solid arrow represents the trend of working media in tube body.
Specific embodiment
The present invention is further illustrated below by specific embodiment.But these examples are merely to illustrate the present invention and do not have to
In limiting the scope of the invention.
As illustrated in fig. 1 and 2, a kind of flaring heat pipe, the hollow tube including both ends sealing, the interior note of the hollow tube
Enter to have working media；The hollow tube includes bringing-up section 1, adiabatic section 2 and radiating segment 3；The bringing-up section 1, adiabatic section 2 and dissipate
The internal diameter of hot arc 3 is all the same；The adiabatic section 2 is consistent with the outer diameter of radiating segment 3, and the outer diameter of the bringing-up section 1 is greater than described exhausted
The outer diameter of hot arc 2 and the radiating segment 3；The inner wall of the bringing-up section 1 is equipped with the first capillary structure 5, the adiabatic section 2 and dissipates
The inner wall of hot arc 3 is equipped with the second capillary structure 6；The thickness of first capillary structure 5 is greater than second capillary structure 6
Thickness.
The proportional region of the length L3 of the length L1 of the bringing-up section 1 and the radiating segment 3 is 1:1.5~1:3.
The outer diameter of the bringing-up section 1 is 1.2~1.4 times of the outer diameter of the adiabatic section 2 and radiating segment 3.
First capillary structure 5 and the second capillary structure 6 are formed by metal powder sintered.
Embodiment 1
As shown in figure 3, a kind of production method for being flared heat pipe, the production method mainly include the following steps that：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First hollow tube one is flared, the length of flared section is L1；Extremely by the other end necking of hollow tube
The half of hollow tube outer diameter（Tolerance is positive and negative 0.5mm）；The outer diameter of flared section is 1.2 times of hollow tube outer diameter；
Step 3：The stainless steel round bar of certain size is inserted into the hollow tube of a necking；
Step 4：Metal powder is inserted in the hollow tube of insertion stainless steel round bar, powder is filled out and carries out high temperature sintering after the completion；
Step 5：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；One end of bringing-up section is carried out at necking
Reason；Certain length is reserved after necking（L2 is generally 5~10mm）Truncation length, using punching mode in the truncation length
It is truncated at L2, there are the circular holes 4 that diameter is 1~1.5mm at the section of truncation part；
Step 6：Hollow tube after truncation is welded, pours into certain medium and vacuum-pumping and sealing into airtight cavity, shape
At heat pipe；When welding, protective gas is passed through into hollow tube by circular hole 4, weld high-temperature oxydation is prevented, is not necessarily to
Annealing.
The proportional region of the length L3 of the length L1 and radiating segment of the bringing-up section is 1:1.5.
Embodiment 2
As shown in figure 3, a kind of production method for being flared heat pipe, the production method mainly include the following steps that：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First hollow tube one is flared, the length of flared section is L1；Extremely by the other end necking of hollow tube
The half of hollow tube outer diameter（Tolerance is positive and negative 0.5mm）；The outer diameter of flared section is 1.3 times of hollow tube outer diameter；
Step 3：The stainless steel round bar of certain size is inserted into the hollow tube of a necking；
Step 4：Metal powder is inserted in the hollow tube of insertion stainless steel round bar, powder is filled out and carries out high temperature sintering after the completion；
Step 5：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；One end of bringing-up section is carried out at necking
Reason；Certain length is reserved after necking（L2 is generally 5~10mm）Truncation length, using punching mode in the truncation length
It is truncated at L2, there are the circular holes 4 that diameter is 1~1.5mm at the section of truncation part；
Step 6：Hollow tube after truncation is welded, pours into certain medium and vacuum-pumping and sealing into airtight cavity, shape
At heat pipe；When welding, protective gas is passed through into hollow tube by circular hole 4, weld high-temperature oxydation is prevented, is not necessarily to
Annealing.
The proportional region of the length L3 of the length L1 and radiating segment of the bringing-up section is 1:2.
Embodiment 3
As shown in figure 3, a kind of production method for being flared heat pipe, the production method mainly include the following steps that：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First hollow tube one is flared, the length of flared section is L1；Extremely by the other end necking of hollow tube
The half of hollow tube outer diameter（Tolerance is positive and negative 0.5mm）；The outer diameter of flared section is 1.4 times of hollow tube outer diameter；
Step 3：The stainless steel round bar of certain size is inserted into the hollow tube of a necking；
Step 4：Metal powder is inserted in the hollow tube of insertion stainless steel round bar, powder is filled out and carries out high temperature sintering after the completion；
Step 5：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；One end of bringing-up section is carried out at necking
Reason；Certain length is reserved after necking（L2 is generally 5~10mm）Truncation length, using punching mode in the truncation length
It is truncated at L2, there are the circular holes 4 that diameter is 1~1.5mm at the section of truncation part；
Step 6：Hollow tube after truncation is welded, pours into certain medium and vacuum-pumping and sealing into airtight cavity, shape
At heat pipe；When welding, protective gas is passed through into hollow tube by circular hole 4, weld high-temperature oxydation is prevented, is not necessarily to
Annealing.
The proportional region of the length L3 of the length L1 and radiating segment of the bringing-up section is 1:3.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (9)
1. a kind of flaring heat pipe is injected with working media in the hollow tube including the hollow tube that a both ends seal；Its
It is characterized in that：The hollow tube includes bringing-up section, adiabatic section and radiating segment；The bringing-up section, adiabatic section and radiating segment it is interior
Diameter is all the same；The adiabatic section is consistent with the outer diameter of radiating segment, and the outer diameter of the bringing-up section is greater than the adiabatic section and described dissipates
The outer diameter of hot arc；The inner wall of the bringing-up section is equipped with the first capillary structure, and the inner wall of the adiabatic section and radiating segment is equipped with
Second capillary structure；The thickness of first capillary structure is greater than the thickness of second capillary structure.
2. a kind of flaring heat pipe as described in claim 1, it is characterised in that：The length L1 of the bringing-up section and the heat dissipation
The proportional region of the length L3 of section is 1:1.5~1:3.
3. a kind of flaring heat pipe as described in claim 1, it is characterised in that：The outer diameter of the bringing-up section is the adiabatic section
With 1.2~1.4 times of the outer diameter of radiating segment.
4. a kind of flaring heat pipe as described in claim 1, it is characterised in that：First capillary structure and the second capillary knot
Structure is formed by metal powder sintered.
5. a kind of production method of flaring heat pipe as described in claim 1, which is characterized in that the production method is mainly wrapped
Include following steps：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First hollow tube one is flared, the length of flared section is L1；Extremely by the other end necking of hollow tube
The half of hollow tube outer diameter（Tolerance is positive and negative 0.5mm）；
Step 3：The stainless steel round bar of certain size is inserted into the hollow tube of a necking；
Step 4：Metal powder is inserted in the hollow tube of insertion stainless steel round bar, powder is filled out and carries out high temperature sintering after the completion；
Step 5：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；One end of bringing-up section is carried out at necking
Reason；Certain length is reserved after necking（L2）Truncation length, using smelting tool to L2 part be truncated；
Step 6：Hollow tube after truncation is welded, pours into certain medium and vacuum-pumping and sealing into airtight cavity, shape
At heat pipe.
6. the production method of flaring heat pipe as claimed in claim 5, it is characterised in that：The outer diameter of the flared section is
1.2~1.4 times of hollow tube outer diameter.
7. the production method of flaring heat pipe as claimed in claim 5, it is characterised in that：The length L1 of the bringing-up section and institute
The proportional region for stating the length L3 of radiating segment is 1:1.5~1:3.
8. the production method of flaring heat pipe as claimed in claim 5, it is characterised in that：In the step 5, using punching
Mode is truncated at the truncation length L2, and there are the round holes that diameter is 1~1.5mm at the section of truncation part
Hole.
9. the production method of flaring heat pipe as claimed in claim 8, it is characterised in that：Carrying out the weldering in the step 6
When connecing process, protective gas is passed through into hollow tube by circular hole, prevents weld high-temperature oxydation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721113.9A CN108871025A (en) | 2018-07-04 | 2018-07-04 | A kind of flaring heat pipe and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721113.9A CN108871025A (en) | 2018-07-04 | 2018-07-04 | A kind of flaring heat pipe and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111346999A (en) * | 2020-03-24 | 2020-06-30 | 重庆志齐机械制造有限公司 | Preparation method of piston tube |
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Application publication date: 20181123 |