CN108827050A - A kind of heat pipe of different tube diameters and preparation method thereof - Google Patents
A kind of heat pipe of different tube diameters and preparation method thereof Download PDFInfo
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- CN108827050A CN108827050A CN201810721152.9A CN201810721152A CN108827050A CN 108827050 A CN108827050 A CN 108827050A CN 201810721152 A CN201810721152 A CN 201810721152A CN 108827050 A CN108827050 A CN 108827050A
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Classifications
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- 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)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of heat pipes of different tube diameters, including the hollow tube that a both ends seal, are injected with working media in the hollow tube；The heat pipe is divided into first segment tube body and second segment tube body, the first segment tube body and second segment tube body has different outer diameter and inner diameters, capillary structure is equipped on the inner wall of the first segment tube body and second segment tube body, the first segment tube body is identical with the capillary structure of second segment tube body.The invention also discloses the production methods of above-mentioned different tube diameters heat pipe.Being made of two sections of tube bodies with different tube diameters for the heat pipe of offer of the invention, substantially increases the heat conduction efficiency of heat pipe.The production method of heat pipe provided by the invention simplifies production technology, reduces production cost without annealing.
Description
Technical field
The present invention relates to a kind of heat pipe and preparation method thereof, concretely relate to a kind of different tube diameters heat pipe and
Its production method.
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.
Currently, the production method of common heat pipe is：First production has the hollow copper pipe of capillary structure, then hollow
Copper pipe one end makes bleeding point, and welded seal does not have one end of bleeding point, and annealing removes residual stress and removes oxidation, note in copper pipe
Enter working solution, sealing makes to form vacuum chamber in heat pipe after being finally evacuated by bleeding point.Such as：Application No. is 201310300986.X
Patent of invention in disclose a kind of small heat pipe manufacture craft, step includes：A. blank is made：Make copper pipe and copper powder block, system
The copper pipe inner wall of work is equipped with several grooves extended along copper pipe axis direction；It is made of sintered copper powder and internal diameter of copper pipe phase
Matched copper powder block.B. bleeding point is processed：It shrinks copper pipe one end to form bleeding point.C. copper powder block is loaded：By what is sintered
One end that copper powder block plug is heated to copper pipe, described heated one end is and bleeding point opposite side.D. welded seal will be equipped with
Copper powder block can be fixed in copper pipe by one end of copper powder block simultaneously by welded seal.E. it anneals, eliminates copper pipe remnants and answer
Power, while restoring the oxide layer generated when welding.F. suitable working solution is injected in fluid injection from bleeding point into copper pipe.G. it takes out
Evacuating air in copper pipe is made to keep inside copper pipe by vacuum sealing by bleeding point simultaneously by bleeding point by welded seal
Vacuum state.Application No. is a kind of production method of flat heat-conducting pipe is disclosed in 201110333144.5 patent application, wrap
Include following steps：A piece blank pipe shortens its head end into a thin diameter portion in advance；The blank pipe is flattened into the thickness of finished product requirement
Specification；By a flat plug, it is placed in the blank pipe, fills out powder sintering；The blank pipe tail end after annealing is welded.
Above-mentioned welding ends does not retain circular hole structure after being truncated in the prior art, can generate when due to welded seal
High temperature, oxidative phenomena after welding in order to prevent, it usually needs made annealing treatment.
Meanwhile in order to improve the heat conduction efficiency of heat pipe, the side of compound capillary structure would generally be used in the prior art
The advantage and disadvantage of method, a variety of different capillary structures are as follows：
The capillary pressure for being sintered powder capillary is big, therefore brilliant for the working fluid conveying capacity of gravitation resistance, according to more
Hole is sintered the clip effect of powder, and thermal conductivity is good, and due to the gradual generation of boiling limitation, the temperature not generated rapidly rises
Phenomenon.But since transmitance is small, pressure loss when driving working fluid is mobile is big.
The transmitance of groove capillary is big, and the pressure loss is small when driving working fluid is mobile.Especially, simple groove capillary
When pipe makes thermal conductivity tube wall, it can be integrally formed, it is advantageous in price.But the diameter of capillary is big, capillary pressure is small,
In the overheat drying regime of part, driving capability is in a disadvantageous position, and due to the rapidly generation of boiling limitation, the temperature generated rapidly rises
Phenomenon.
Although microfibre capillary capillary pressure is big, resistance to heat is also beaten；Transmitance is small and drives working fluid mobile
When the pressure loss it is big, part overheat drying regime in driving capability be in a disadvantageous position.
The capillary pressure of shield capillary is intermediate degree, and transmitance is small and the pressure loss is big when driving working fluid, heat
Resistance is also big.
There are some merits and demerits in above-mentioned single capillary structure, in order to enable the state optimization of capillary, existing
Having also has many capillary pipe structures for using MULTIPLE COMPOSITE capillary in technology, improve capillary pressure and transmitance.However, this kind of
Heat pipe with two or more capillary type and structure, manufacturing process is relative complex, cost of manufacture is also relatively high.
Summary of the invention
In view of the deficiencies of the prior art, different using its invention proposes a kind of heat pipe with different tube diameters
Inside and outside diameter optimizes heat conduction efficiency so that the tube body of different piece has different capillary pressure and transmitance；The present invention is also
Propose a kind of simple process, without annealing, the production method of the different tube diameters heat pipe of lower production costs.
The technical proposal for solving the technical problem of the invention is：A kind of heat pipe of different tube diameters, including a both ends
The hollow tube of sealing is injected with working media in the hollow tube；The heat pipe is divided into first segment tube body and second segment
Tube body, the first segment tube body and second segment tube body have different outer diameter and inner diameters, the first segment tube body and second segment
Capillary structure is equipped on the inner wall of tube body, the first segment tube body is identical with the capillary structure of second segment tube body.
Further, the length ratio of the first segment tube body and second segment tube body is 1:5~1:1.
Further, the outer diameter ratio of the first segment tube body and second segment tube body is 1:3~1:1.1.
Further, the capillary structure of the first segment and second segment is formed by metal powder sintered.
A kind of production method of the heat pipe of different tube diameters, 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 to hollow tube one end（The end a）It is welded；Then, insertion is certain in the hollow tube welded at one
The stainless steel round bar of size；
Step 3：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 4：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；To the first of the end b close in hollow tube
Duan Guanti carries out draw processing；
Step 5：Necking processing is carried out to the draw treated the end b, necking size is the half of first segment outer tube diameter
（Tolerance is positive and negative 0.5mm）；
Step 6：The length of the end b necking is L1, retains certain truncation length L2, and the end b is truncated using truncation smelting tool,
There are circular holes at the section of truncation part；
Step 7：Hollow tube after truncation is welded, when welding, is passed through protection into hollow tube by circular hole
Gas prevents weld high-temperature oxydation；It pours into certain medium and vacuum-pumping and sealing is at airtight cavity, form heat pipe.
Further, the specific method of the draw processing is：The end a of heat pipe is positioned, by the push-in beating type rotation of the end b
In contracting machine, the first segment tube body of heat pipe is subjected to draw processing.
Further, the necking length L1 at the end b is 3~10mm.
Further, after the end the b truncation, there are the circular holes that diameter is not less than 1.5mm at the section of truncation part.
Further, the truncation jig is truncated hollow tube using punching mode, and the truncation jig is main
It is made of pedestal, knife box, cutting blade and fixed blade, the fixed blade is fixed in the knife box, the cutting blade and cylinder phase
Even, cutting blade is controlled up and down by cylinder the end b of hollow tube is truncated.
The beneficial effects of the invention are as follows：Compared with prior art, the heat pipe of offer of the invention is had not by two sections
Tube body with caliber forms, and the capillary structure of two sections of tube bodies is identical；Working fluid in heat pipe after the heated vaporization of bringing-up section,
Radiating segment is flowed to, in radiating segment tube wall condensation liquefaction, the working fluid after liquefaction is back to heating under the action of capillary force
Section；In the present invention, using the lesser one end of caliber as bringing-up section, since the caliber of bringing-up section is smaller, capillary force compared with
Greatly, it flows back more apparent, substantially increases the heat conduction efficiency of heat pipe.
In the production method of heat pipe provided by the invention, reserve truncation part after hollow tube b end necking, when truncation from
The truncation jig of system is punched out truncation, and there are the circular holes that diameter is not less than 1.5mm for truncation surface；When welding, pass through circle
Hole is passed through protective gas into hollow tube, prevents weld high-temperature oxydation, may not need annealing, simplifies production work
Skill reduces production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heat pipe provided by the invention.
Fig. 2 is the flow chart of the production method of heat pipe provided by the invention.
Fig. 3 is the schematic cross-section after the truncation of the end heat pipe b.
Fig. 4 is the structural schematic diagram that jig is truncated.
Wherein, 1- first segment tube body；2- second segment tube body；3- capillary structure；4- circular hole；5- cylinder；6- cutting blade；
7- fixed blade；8- knife box；9- pedestal.
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.
Embodiment 1
As shown in figures 1-4, a kind of heat pipe of different tube diameters, the hollow tube including both ends sealing, in the hollow tube
It is injected with working media；The heat pipe is divided into first segment tube body 1 and second segment tube body 2, the first segment tube body 1 and second
Duan Guanti 2 has different outer diameter and inner diameters, is equipped with capillary knot on the inner wall of the first segment tube body 1 and second segment tube body 2
The capillary structure 3 of structure 3, the first segment tube body 1 and second segment tube body 2 is formed by metal powder sintered.
The length ratio of the first segment tube body and second segment tube body is 1:2.The first segment tube body and second segment tube body
Outer diameter ratio is 1:1.5.
A kind of production method of the heat pipe of different tube diameters, 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 to hollow tube one end（The end a）It is welded；Then, insertion is certain in the hollow tube welded at one
The stainless steel round bar of size；
Step 3：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 4：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；To the first of the end b close in hollow tube
Duan Guanti 1 carries out draw processing；The specific method of draw processing is：The end a of heat pipe is positioned, the end b is pushed into and is hit
Formula is revolved in contracting machine, and the first segment tube body 1 of heat pipe is carried out draw processing.
Step 5：Necking processing is carried out to the draw treated the end b, necking size is 1 outer diameter of first segment tube body
Half（Tolerance is positive and negative 0.5mm）；
Step 6：The length of the end b necking is L1, and L1 is 3~10mm, retains certain truncation length L2, using truncation smelting tool to b
End is truncated, and there are the circular holes 4 that diameter is not less than 1.5mm at the section of truncation part；The truncation jig is using punching
Hollow tube is truncated in butt formula, and the truncation jig is mainly made of pedestal 9, knife box 8, cutting blade 6 and fixed blade 7,
The fixed blade 7 is fixed in the knife box 8, and the cutting blade 6 is connected with cylinder 5, controls cutting blade pair by about 5 cylinder
The end b of hollow tube is truncated.
Step 7：Hollow tube after truncation is welded, when welding, is led to by circular hole 4 into hollow tube
Enter protective gas, prevents weld high-temperature oxydation；It pours into certain medium and vacuum-pumping and sealing is at airtight cavity, form thermal conductivity
Pipe.
Embodiment 2
As shown in figures 1-4, a kind of heat pipe of different tube diameters, the hollow tube including both ends sealing, in the hollow tube
It is injected with working media；The heat pipe is divided into first segment tube body 1 and second segment tube body 2, the first segment tube body 1 and second
Duan Guanti 2 has different outer diameter and inner diameters, is equipped with capillary knot on the inner wall of the first segment tube body 1 and second segment tube body 2
The capillary structure 3 of structure 3, the first segment tube body 1 and second segment tube body 2 is formed by metal powder sintered.
The length ratio of the first segment tube body and second segment tube body is 1:3.The first segment tube body and second segment tube body
Outer diameter ratio is 1:1.8.
The production method of above-mentioned different tube diameters heat pipe is the same as embodiment 1.
Embodiment 3
As shown in figures 1-4, a kind of heat pipe of different tube diameters, the hollow tube including both ends sealing, in the hollow tube
It is injected with working media；The heat pipe is divided into first segment tube body 1 and second segment tube body 2, the first segment tube body 1 and second
Duan Guanti 2 has different outer diameter and inner diameters, is equipped with capillary knot on the inner wall of the first segment tube body 1 and second segment tube body 2
The capillary structure 3 of structure 3, the first segment tube body 1 and second segment tube body 2 is formed by metal powder sintered.
The length ratio of the first segment tube body and second segment tube body is 1:4.The first segment tube body and second segment tube body
Outer diameter ratio is 1:2.
The production method of above-mentioned different tube diameters heat pipe is the same as embodiment 1.
Embodiment 4
As shown in figures 1-4, a kind of heat pipe of different tube diameters, the hollow tube including both ends sealing, in the hollow tube
It is injected with working media；The heat pipe is divided into first segment tube body 1 and second segment tube body 2, the first segment tube body 1 and second
Duan Guanti 2 has different outer diameter and inner diameters, is equipped with capillary knot on the inner wall of the first segment tube body 1 and second segment tube body 2
The capillary structure 3 of structure 3, the first segment tube body 1 and second segment tube body 2 is formed by metal powder sintered.
The length ratio of the first segment tube body and second segment tube body is 1:4.5.The first segment tube body and second segment tube body
Outer diameter ratio be 1:2.2.
The production method of above-mentioned different tube diameters heat pipe is the same as embodiment 1.
Embodiment 5
As shown in figures 1-4, a kind of heat pipe of different tube diameters, the hollow tube including both ends sealing, in the hollow tube
It is injected with working media；The heat pipe is divided into first segment tube body 1 and second segment tube body 2, the first segment tube body 1 and second
Duan Guanti 2 has different outer diameter and inner diameters, is equipped with capillary knot on the inner wall of the first segment tube body 1 and second segment tube body 2
The capillary structure 3 of structure 3, the first segment tube body 1 and second segment tube body 2 is formed by metal powder sintered.
The length ratio of the first segment tube body and second segment tube body is 1:5.The first segment tube body and second segment tube body
Outer diameter ratio is 1:3.
The production method of above-mentioned different tube diameters heat pipe is the same as embodiment 1.
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 heat pipe of different tube diameters is injected with work in the hollow tube including the hollow tube that a both ends seal
Medium；It is characterized in that：The heat pipe is divided into first segment tube body and second segment tube body, the first segment tube body and second segment
Tube body has different outer diameter and inner diameters, is equipped with capillary structure on the inner wall of the first segment tube body and second segment tube body, institute
It is identical with the capillary structure of second segment tube body to state first segment tube body.
2. a kind of heat pipe of different tube diameters as described in claim 1, it is characterised in that：The first segment tube body and second segment
The length ratio of tube body is 1:5~1:1.
3. a kind of heat pipe of different tube diameters as described in claim 1, it is characterised in that：The first segment tube body and second segment
The outer diameter ratio of tube body is 1:3~1:1.1.
4. a kind of heat pipe of different tube diameters as described in claim 1, it is characterised in that：The hair of the first segment and second segment
Fine texture is formed by metal powder sintered.
5. a kind of production method of the heat pipe of the different tube diameters as described in any one of Claims 1-4, feature exist
In the production method mainly includes the following steps that：
Step 1：A kind of circular hollow tube body is provided, homogeneous tube length is L；
Step 2：First to hollow tube one end（The end a）It is welded；Then, insertion is certain in the hollow tube welded at one
The stainless steel round bar of size；
Step 3：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 4：After the completion of sintering, the intracorporal stainless steel round bar of hollow tube is extracted；To the first of the end b close in hollow tube
Duan Guanti carries out draw processing；
Step 5：Necking processing is carried out to the draw treated the end b, necking size is the half of first segment outer tube diameter
（Tolerance is positive and negative 0.5mm）；
Step 6：The length of the end b necking is L1, retains certain truncation length L2, and the end b is truncated using truncation smelting tool,
There are circular holes at the section of truncation part；
Step 7：Hollow tube after truncation is welded, when welding, is passed through protection into hollow tube by circular hole
Gas prevents weld high-temperature oxydation；It pours into certain medium and vacuum-pumping and sealing is at airtight cavity, form heat pipe.
6. a kind of production method of the heat pipe of different tube diameters as claimed in claim 5, it is characterised in that：The draw processing
Specific method be：The end a of heat pipe is positioned, by the push-in beating type rotation contracting machine of the end b, by the first segment tube body of heat pipe into
The processing of the row draw.
7. a kind of production method of the heat pipe of different tube diameters as claimed in claim 5, it is characterised in that：The contracting at the end b
Mouth length L1 is 3~10mm.
8. a kind of production method of the heat pipe of different tube diameters as claimed in claim 5, it is characterised in that：The end the b truncation
Afterwards, there are the circular holes that diameter is not less than 1.5mm at the section of truncation part.
9. a kind of production method of the heat pipe of different tube diameters as claimed in claim 5, it is characterised in that：The truncation jig
Hollow tube is truncated using punching mode, the truncation jig is mainly by pedestal, knife box, cutting blade and fixed blade group
At the fixed blade is fixed in the knife box, and the cutting blade is connected with cylinder, controls cutting blade centering up and down by cylinder
The end b of blank pipe body is truncated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721152.9A CN108827050A (en) | 2018-07-04 | 2018-07-04 | A kind of heat pipe of different tube diameters and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721152.9A CN108827050A (en) | 2018-07-04 | 2018-07-04 | A kind of heat pipe of different tube diameters and preparation method thereof |
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| CN108827050A true CN108827050A (en) | 2018-11-16 |
Family
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Family Applications (1)
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|---|---|---|---|
| CN201810721152.9A Pending CN108827050A (en) | 2018-07-04 | 2018-07-04 | A kind of heat pipe of different tube diameters and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237364A (en) * | 2021-04-25 | 2021-08-10 | 西安交通大学 | High-temperature heat pipe processing and manufacturing method |
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