CN205642138U - Can avoid cannon barrel that excessively generates heat - Google Patents
Can avoid cannon barrel that excessively generates heat Download PDFInfo
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- CN205642138U CN205642138U CN201620341778.3U CN201620341778U CN205642138U CN 205642138 U CN205642138 U CN 205642138U CN 201620341778 U CN201620341778 U CN 201620341778U CN 205642138 U CN205642138 U CN 205642138U
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- change material
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Abstract
The utility model relates to a can avoid cannon barrel that excessively generates heat, the outer wall of ring fire barrel pipe is equipped with the cavity, and the inner ring surface directness of cavity and the outer surface contact of cannon barrel are packaged with phase change material in it, one kind and above low -melting -point alloy as the base metal preparation during phase change material is the gallium or uses gallium, bismuth, indium. Can pass through wall mounting fin in the cavity, or pack foamed metal or expandable graphite in the cavity, strengthen the inside heat transfer of cavity. The utility model discloses a wrap up phase change material outside the cannon barrel, when the shot is launched or during sun illumination, phase change material absorbs the heat and melts, and the temperature remains unchanged to the temperature that makes the cannon barrel keeps at lower temperature range and good temperature homogeneity, avoids the cannon barrel because of the distribution of temperature inequality produces the adverse effect that the thermal stress problem was brought, promotes its and strikes the precision.
Description
Technical field
This utility model belongs to gun barrel technical field, particularly to a kind of gun barrel avoiding excessive heating.
Background technology
Cannon refers to that utilizing gunpowder thorax burning formation gases at high pressure in pipe, to launch the weapon of bullet, is the long-range strike equipment of a kind of great lethality.Digitized war now requires the hitting target of fast accurate, and therefore, fast reaction, accurately strike, first round hit probability become the important performance indexes of cannon weapon.
Barrel is the topmost part of artillery gun body, is used for giving the initial velocity of projectile flight and decide its heading.Along with the requirement of gun power is increasing, breech pressure and calorific intensity are more and more higher, and barrel heating problem is increasingly severe.The overheated thermal (temperature difference) stress that can increase in barrel of barrel, causes the change of its rigidity, dynamic flexural when impact is launched and launch accuracy.Additionally, the thermal stress that solar irradiation also can cause barrel bends.Strong by solar radiation towards the barrel part of the sun, temperature is high, the most relatively low back to a surface temperature of the sun.Different Temperature Distribution causes the thermal stress of barrel poor, thus causes barrel to bend.Having calculating to show, solar irradiation may result in barrel sunny slope and the temperature difference of shady face about 6 DEG C, and the thermal flexure of generation may result in the change nearly 2 meters of 1200 meters of trajectory generations at a distance, and this is clearly the most totally unfavorable for the precision of cannon.
Therefore, if barrel can be carried out suitable cooling, will greatly eliminate the emendation caused due to overheated or temperature distributing disproportionation and the launch accuracy thus caused and life problems.Generally, gun barrel does not take special heat management measure, and the heat passing to barrel is usually lost in the middle of extraneous air in the way of free convection.It practice, free convection is the radiating mode that a kind of efficiency is the lowest, this causes the heat passing to barrel to be difficult to scatter and disappear, thus temperature raises rapidly.The thermal conductivity of low-melting-point metal is tens times of conventional phase change material, and the latent heat of phase change value of unit volume is high, phase transformation change in volume is little, non-combustible, it it is the most promising phase-change material of one, thus, this phase-change material is applied to the heat radiation of gun barrel by this utility model can significantly improve the thermal stress issues of barrel, improves its attack precision.
Utility model content
Not enough for prior art, this utility model provides a kind of gun barrel avoiding excessive heating.
A kind of gun barrel avoiding excessive heating, the outer wall of ring gun barrel 1 is provided with cavity 2, described cavity 2 includes internal ring and outer shroud, elongated setting along gun barrel 1, internal ring directly contacts with the outer surface of gun barrel 1, the sealing two ends of internal ring and outer shroud forms airtight chamber, is packaged with phase-change material 3 in chamber；Wherein, the material of described cavity 2 is nickel, rustless steel, graphite, copper or aluminum, and described phase-change material 3 is for gallium or with the low-melting alloy that is a kind of and that prepare for base metal above in gallium, bismuth, indium, the fusing point of phase-change material 3 is 10～200 DEG C.
Preferably:
The material of described cavity 2 uses copper or aluminum, and wherein, the inner surface of cavity 2 carries out coating process or oxidation processes, to prevent the phase-change material 3 corrosion to cavity 2.
Described phase-change material 3 is gallium, gallium-indium alloy or bismuth indium stannum alloy.
The fin 4 heat transmission with strengthening inside cavity is installed on the inwall of described cavity 2.
Being filled with the heat transmission with strengthening inside cavity of foam metal or expanded graphite in described cavity 2, phase-change material 3 is filled in the gap of foam metal or expanded graphite.
The beneficial effects of the utility model are:
A kind of based on the cooling of low-melting-point metal phase transformation material the gun barrel that this utility model provides, its advantage is by gun barrel outer wrapping phase-change material, when pellet injection or the time of shining upon, phase-change material absorbs heat and melts, and temperature keeps constant, so that the temperature of gun barrel is maintained at relatively low temperature range and good temperature homogeneity, it is to avoid gun barrel produces, because of temperature distributing disproportionation, the adverse effect that thermal stress issues is brought, and promotes its attack precision.Additionally, due to the potential heat value of low-melting-point metal unit volume is big, therefore consumption can be less, so that total is compacter.Meanwhile, low-melting-point metal phase transformation material thermal conductivity is high, it is possible to achieve efficient heat transmission and absorption.
Accompanying drawing explanation
Fig. 1 is a kind of gun barrel avoiding excessive heating；
Fig. 2 is the A-A face sectional view that embodiment 1 one kinds can avoid the gun barrel of excessive heating；
Fig. 3 is the A-A face sectional view that embodiment 2 one kinds can avoid the gun barrel of excessive heating.
Label declaration: 1-gun barrel, 2-cavity, 3-phase-change material, 4-fin.
Detailed description of the invention
With detailed description of the invention, this utility model is described further below in conjunction with the accompanying drawings.It is emphasized that it is that the description below is merely exemplary rather than in order to limit scope of the present utility model and application thereof.
Embodiment 1:
Fig. 1 is the schematic appearance of a kind of gun barrel avoiding excessive heating, and Fig. 2 is A-A face sectional view.Gun barrel 1 is outside arranges annular housing 2, cavity 2 includes internal ring and outer shroud, elongated setting along gun barrel 1, internal ring directly contacts with the outer surface of gun barrel 1, the sealing two ends of internal ring and outer shroud forms airtight chamber, phase-change material 3 it is packaged with in chamber, heat when passing to the heat of barrel or shine upon in time absorbing pellet injection, keep barrel temperature at relatively low scope and homogeneous temperature.Wherein, the material of cavity 2 is copper, aluminum, nickel, rustless steel or graphite；When using copper or aluminum, the inner surface of cavity 2 carries out coating process or oxidation processes, to prevent from being corroded by phase-change material 3.Phase-change material 3 is low-melting-point metal, including gallium, gallium-indium alloy, bismuth indium stannum alloy or other are with a kind of in gallium, bismuth, indium and the low-melting alloy prepared for base metal above.The interior ring outer surface of cavity 2 directly contacts with the outer surface of gun barrel 1, absorb the heat of gun barrel 1 and pass to phase-change material 3, phase-change material 3 absorbs heat and heats up, after temperature arrives its fusing point, will melt, owing to the latent heat of phase change value of phase-change material 3 is high, phase transition process absorbs amount of heat but temperature keeps constant.
Embodiment 2:
Fig. 1 is the schematic appearance of a kind of gun barrel avoiding excessive heating, and Fig. 3 is A-A face sectional view.As different from Example 1, being provided with fin 4 in cavity 2, fin 4 can improve heat further and pass to the efficiency of phase-change material 3.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; on the premise of without departing from this utility model know-why; can also make some improvement and replacement, these improve and replace and also should be regarded as protection domain of the present utility model.
Claims (5)
1. the gun barrel that can avoid excessive heating, it is characterised in that outside ring gun barrel (1)
Wall is provided with cavity (2), and described cavity (2) includes internal ring and outer shroud, along elongated the setting of gun barrel (1)
Putting, internal ring directly contacts with the outer surface of gun barrel (1), and the sealing two ends of internal ring and outer shroud is formed close
Close chamber, in chamber, be packaged with phase-change material (3)；Wherein, the material of described cavity (2) is nickel, no
Rust steel, graphite, copper or aluminum, described phase-change material (3) be gallium or with the one in gallium, bismuth, indium and with
The upper low-melting alloy prepared for base metal, the fusing point of phase-change material (3) is 10～200 DEG C.
A kind of gun barrel avoiding excessive heating, it is characterised in that
The material of described cavity (2) uses copper or aluminum, wherein, the inner surface of cavity (2) carry out coating process or
Oxidation processes, to prevent the phase-change material (3) corrosion to cavity (2).
A kind of gun barrel avoiding excessive heating, it is characterised in that
Described phase-change material (3) is gallium, gallium-indium alloy or bismuth indium stannum alloy.
A kind of gun barrel avoiding excessive heating, it is characterised in that
Fin (4) is installed on the inwall of cavity (2) transmit with the heat strengthening inside cavity.
A kind of gun barrel avoiding excessive heating, it is characterised in that
The heat transmission with strengthening inside cavity of foam metal or expanded graphite, phase transformation material it is filled with in cavity (2)
Material (3) is filled in the gap of foam metal or expanded graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620341778.3U CN205642138U (en) | 2016-04-21 | 2016-04-21 | Can avoid cannon barrel that excessively generates heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620341778.3U CN205642138U (en) | 2016-04-21 | 2016-04-21 | Can avoid cannon barrel that excessively generates heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205642138U true CN205642138U (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620341778.3U Active CN205642138U (en) | 2016-04-21 | 2016-04-21 | Can avoid cannon barrel that excessively generates heat |
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| CN (1) | CN205642138U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180781A (en) * | 2017-12-26 | 2018-06-19 | 云南靖创液态金属热控技术研发有限公司 | A kind of cooling device and its Tank Gun Barrel of the Tank Gun Barrel based on phase-change material |
| CN109579614A (en) * | 2017-09-28 | 2019-04-05 | 镇江中广告制品有限公司 | One kind can radiate salvo |
| SE2100145A1 (en) * | 2021-10-07 | 2023-04-08 | Bae Systems Bofors Ab | Temperature equalization system for fire tubes |
-
2016
- 2016-04-21 CN CN201620341778.3U patent/CN205642138U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579614A (en) * | 2017-09-28 | 2019-04-05 | 镇江中广告制品有限公司 | One kind can radiate salvo |
| CN108180781A (en) * | 2017-12-26 | 2018-06-19 | 云南靖创液态金属热控技术研发有限公司 | A kind of cooling device and its Tank Gun Barrel of the Tank Gun Barrel based on phase-change material |
| SE2100145A1 (en) * | 2021-10-07 | 2023-04-08 | Bae Systems Bofors Ab | Temperature equalization system for fire tubes |
| WO2023059243A1 (en) * | 2021-10-07 | 2023-04-13 | Bae Systems Bofors Ab | Temperature compensation system for barrels |
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