CN210604701U - Vacuum microwave camera bellows with rubber absorbing structure - Google Patents
Vacuum microwave camera bellows with rubber absorbing structure Download PDFInfo
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- CN210604701U CN210604701U CN201921032730.4U CN201921032730U CN210604701U CN 210604701 U CN210604701 U CN 210604701U CN 201921032730 U CN201921032730 U CN 201921032730U CN 210604701 U CN210604701 U CN 210604701U
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Abstract
The utility model discloses a vacuum microwave camera bellows with rubber absorbing structure, including rubber absorbing material, ripples pyramid, heat conduction pyramid, heat dissipation bottom plate, microwave camera bellows, extraction opening, shielding power mouth, shield door and antenna. The rubber wave-absorbing materials are laid on the inner wall of the microwave camera bellows and the surfaces of the internal parts of the microwave camera bellows, so that the space inside the microwave camera bellows is saved on the premise of not influencing the use, the inside of the microwave camera bellows can be directly vacuumized through an external vacuum pump, and the microwave camera bellows is different from the problem that the space is occupied due to the fact that the traditional vacuum cover mode is adopted for testing; the heat conduction pyramid and the heat dissipation bottom plate in the rubber wave-absorbing material can effectively solve the heat dissipation problem of rubber wave-absorbing material, because do not possess the air in the interior of the microwave camera bellows or the microwave camera bellows, traditional wave-absorbing material heat dispersion is relatively poor, can lead to the temperature rise of the interior of microwave camera bellows or microwave camera bellows to cause certain influence to the test.
Description
Technical Field
The utility model relates to a microwave camera bellows specifically is a vacuum microwave camera bellows with rubber absorbing structure, belongs to microwave camera bellows technical field.
Background
Testing of microwave products often requires testing in a microwave dark box without microwave reflection and interference. Some microwave products have special use environments, and microwave equipment such as antennas used on satellites needs to be used in a vacuum environment, so that testing must be performed in a vacuum. The wave-absorbing material used in the common microwave dark box can not be subjected to vacuum test due to the problems of air outlet and heat dissipation of the material. Therefore, for the test of the products, a new technical scheme needs to be designed, so that the test can meet the conditions of no microwave reflection and no interference and meet the vacuum test requirement.
The existing vacuum microwave test method for microwave products mainly adopts a method that a piece to be tested is placed in a sealed vacuum cover and then is tested in a microwave dark box. The method generally uses glass and other materials with good wave transmission and high strength to manufacture the vacuum cover, and occupies a dark box space; in addition, the whole test process needs to be carried out in a vacuum environment, and the wave-absorbing material can absorb a large amount of heat energy in the test process due to the absence of air, so that the temperature of the detection environment rises, and the test structure is indirectly influenced. Therefore, the vacuum microwave dark box with the rubber wave absorbing structure is provided for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a vacuum microwave camera bellows with rubber absorbing structure in order to solve above-mentioned problem.
The utility model realizes the purpose through the following technical proposal, a vacuum microwave camera bellows with a rubber wave-absorbing structure, which comprises a test auxiliary mechanism and a wave-absorbing mechanism;
the test auxiliary mechanism comprises a microwave camera bellows, an air extraction opening, a shielding power supply opening, a shielding door and an antenna, wherein the air extraction opening is communicated and installed at the corner of the side wall of the microwave camera bellows, the shielding power supply opening and the shielding door are arranged on the side wall of the microwave camera bellows, and the antenna is fixedly connected to the inner wall of the bottom of the microwave camera bellows;
the wave-absorbing mechanism comprises a plurality of rubber wave-absorbing materials and a plurality of rubber wave-absorbing materials which are uniformly fixedly connected to the inner wall of the rubber wave-absorbing materials, the rubber wave-absorbing materials comprise wave-absorbing pyramids, heat-conducting pyramids and a heat-radiating bottom plate, one side of the heat-radiating bottom plate is attached to the inner wall of a microwave camera bellows, the other side of the heat-radiating bottom plate is fixedly connected with the wave-absorbing pyramids and the heat-conducting pyramids, the wave-absorbing pyramids are of a hollow structure, and the heat-conducting pyramids are sleeved on the inner wall of the wave-absorbing pyramids.
Preferably, the wave-absorbing pyramid and the heat-conducting pyramid are both in a rectangular pyramid structure in external shape.
Preferably, the heat dissipation base plate is a flat plate with a tetragonal structure, and the central axes of the wave-absorbing pyramid and the heat-conducting pyramid penetrate through the central point of the heat dissipation base plate.
Preferably, the antenna is located at a central position inside the microwave dark box.
Preferably, the thickness of the side wall of the wave-absorbing pyramid is the same as that of the heat-conducting pyramid.
Preferably, the thickness of the heat dissipation bottom plate is twice of that of the wave-absorbing pyramid side wall.
Preferably, the microwave dark box is a sealing structure.
Preferably, the hollow structures in the wave-absorbing pyramid and the heat-conducting pyramid are all in a quadrangular pyramid shape.
Preferably, the wave-absorbing pyramid, the heat-conducting pyramid and the heat-radiating bottom plate are tightly attached to form a sealing structure.
Preferably, the wave-absorbing pyramid and the heat-conducting pyramid are of rectangular pyramid structures with different sizes and similar shapes.
The utility model has the advantages that:
1. the rubber wave-absorbing materials are laid on the inner wall of the microwave camera bellows and the surfaces of the internal parts of the microwave camera bellows, so that the space inside the microwave camera bellows is saved on the premise of not influencing the use, the inside of the microwave camera bellows can be directly vacuumized through an external vacuum pump, and the microwave camera bellows is different from the problem that the space is occupied due to the fact that the traditional vacuum cover mode is adopted for testing;
2. the heat conduction pyramid and the heat dissipation bottom plate in the rubber wave-absorbing material can effectively solve the heat dissipation problem of rubber wave-absorbing material, because do not possess the air in the interior of the microwave camera bellows or the microwave camera bellows, traditional wave-absorbing material heat dispersion is relatively poor, can lead to the temperature rise of the interior of microwave camera bellows or microwave camera bellows to cause certain influence to the test.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic view of the three-dimensional cross-sectional structure of the microwave dark box of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the rubber wave-absorbing material of the present invention;
FIG. 3 is a schematic view of the top view structure of the rubber wave-absorbing material of the present invention;
fig. 4 is a schematic view of the cross-sectional structure of the microwave camera bellows of the present invention.
In the figure: 1. the rubber wave-absorbing material comprises 101 a wave-absorbing pyramid, 102 a heat-conducting pyramid, 103 a heat-radiating bottom plate, 2 a microwave camera bellows, 3 an air pumping hole, 4 a shielding power supply hole, 5 a shielding door, 6 and an antenna.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Referring to fig. 1-3, a vacuum microwave dark box with a rubber wave-absorbing structure includes a test auxiliary mechanism and a wave-absorbing mechanism;
the test auxiliary mechanism comprises a microwave camera bellows 2, an air exhaust port 3, a shielding power supply port 4, a shielding door 5 and an antenna 6, the air exhaust port 3 is communicated and installed at the corner of the side wall of the microwave camera bellows 2, the side wall of the microwave camera bellows 2 is connected with an external vacuum pump after shielding treatment, the shielding power supply port 4 and the shielding door 5 are arranged on the side wall of the microwave camera bellows 2, radiation emitted by a power supply of electronic equipment inside the microwave camera bellows 2 is conveniently shielded, and the antenna 6 is fixedly connected to the inner wall of the bottom of the microwave camera bellows 2, so that testing is facilitated;
the wave absorbing mechanism comprises a plurality of rubber wave absorbing materials 1 and a plurality of rubber wave absorbing materials 1 which are uniformly fixedly connected on the inner wall of the rubber wave absorbing materials 1, and is convenient for wave absorbing, the rubber wave absorbing materials 1 comprise wave absorbing pyramids 101, heat conducting pyramids 102 and a heat radiating bottom plate 103, the inner wall of a microwave camera bellows 2 attached to one side of the heat radiating bottom plate 103 is convenient for heat radiation, wave absorbing pyramids 101 and the heat conducting pyramids 102 are fixedly connected to the other side of the heat radiating bottom plate 103, so that wave absorbing and heat radiation are convenient, the wave absorbing pyramids 101 and the inside of the heat conducting pyramids 102 are hollow structures, and the heat conducting pyramids 102 are sleeved on the inner wall of the wave absorbing pyramids 101, so that the heat radiating of the.
The wave-absorbing pyramid 101 and the heat-conducting pyramid 102 are both in a rectangular pyramid structure in external shape, so that wave absorption and heat dissipation are facilitated; the heat dissipation base plate 103 is a flat plate with a tetragonal structure, and the central axes of the wave-absorbing pyramid 101 and the heat-conducting pyramid 102 penetrate through the central point of the heat dissipation base plate 103, so that heat dissipation is facilitated; the antenna 6 is positioned in the center of the interior of the microwave camera bellows 2, so that the test is facilitated; the thickness of the side wall of the wave-absorbing pyramid 101 is the same as that of the heat-conducting pyramid 102, so that space is reasonably utilized; the thickness of the heat dissipation bottom plate 103 is twice of that of the side wall of the wave-absorbing pyramid 101, so that heat dissipation is facilitated; the microwave camera bellows 2 is of a sealing structure, so that the vacuum pumping is convenient; the hollow structures in the wave absorbing pyramid 101 and the heat conducting pyramid 102 are all in a quadrangular pyramid shape, so that heat dissipation is facilitated; the wave-absorbing pyramid 101, the heat-conducting pyramid 102 and the heat-radiating bottom plate 103 are tightly attached to form a sealing structure, so that wave absorption is facilitated; the shape of the wave-absorbing pyramid 101 and the shape of the heat-conducting pyramid 102 are of rectangular pyramid structures with different sizes and similar shapes, so that the ratio of the area to the volume of the wave-absorbing pyramid 101 to the volume of the heat-conducting pyramid 102 is increased.
When the utility model is used, the wave-absorbing pyramid 101 surrounds the heat-conducting pyramid 102 and is arranged on the heat-radiating bottom plate 103, the inner surface of the wave-absorbing pyramid 101 is tightly attached to the outer surface of the heat-conducting pyramid 102, the bottom surface of the wave-absorbing pyramid 101 is tightly attached to the upper surface of the heat-dissipating base plate 103, because the vacuum environment has no air, the heat radiation can not depend on the air conduction and convection, the heat converted by the microwave remains in the wave-absorbing material in a large amount during the test, therefore, the heat in the wave-absorbing material needs to be transferred and diffused, the wave-absorbing pyramid 101 adopts a hollow structure, the surface area of the material can be increased, thereby improving the heat dissipation capability, the heat conduction pyramid 102 is made of metal material with excellent heat conduction performance, such as copper or aluminum, and can quickly collect the heat on the inner surface of the wave absorption pyramid 101, the heat is transmitted out through the heat dissipation bottom plate 103, and the heat can be timely diffused out through the metal wall of the microwave camera bellows 2 by the heat dissipation bottom plate 103;
the wave-absorbing pyramid 101 is in the shape of a hollow rectangular pyramid, the hollow part is also in the shape of a rectangular pyramid, the wave-absorbing pyramid 101 is similar to the hollow pyramid in shape, the wave-absorbing pyramid 101 is made of power-resistant low-gas-outlet special wave-absorbing rubber, graphite powder, aluminum-magnesium powder mixture, curing agent and stabilizing agent are added into raw rubber, and the wave-absorbing pyramid is formed by final vulcanization treatment, compared with the traditional polyurethane foam wave-absorbing material, the special wave-absorbing rubber has lower gas outlet rate and is more power-resistant, and the wave-absorbing pyramid 101 is suitable for being used in a vacuum environment, in order to improve the ratio of the area to the volume of the wave-absorbing pyramid 101 as much as possible, the heat dissipation capacity is improved, the wave-absorbing pyramid 101 adopts a long and thin rectangular pyramid.
The heat conduction pyramid 102 and the heat dissipation bottom plate 103 are used for enhancing heat dissipation and reducing material gas emission, the shape and the size of the outer surface of the heat conduction pyramid 102 are completely the same as those of the inner surface of the wave absorbing pyramid 101 and are tightly attached to each other, the heat conduction pyramid 102 adopts the shape similar to that of the wave absorbing pyramid 101 so as to uniformly transfer heat inside the wave absorbing pyramid 101, and the used material is metal with good heat conduction performance such as copper or aluminum;
the heat dissipation bottom plate 103 is a square flat plate made of metal with good heat conduction performance, the heat conduction pyramid 102 is arranged in the center of the heat dissipation bottom plate 103 and is in sealing fit and connection, the significance lies in that the hollow inner surface of the heat conduction pyramid 102 can be sealed, the total surface area of the rubber wave-absorbing material for the vacuum environment is reduced, the material gas emission is reduced, the size of the heat dissipation bottom plate 103 is the same as that of the bottom surface of the wave-absorbing pyramid 101 and is in tight fit, the significance lies in that the surface area of the wave-absorbing rubber with high gas emission rate is reduced, the surface area of metal with low gas emission rate is increased, the material gas emission is reduced, and the material heat.
In this embodiment, a microwave chamber 2 satisfying the microwave test requirement of a certain satellite antenna 6 is prepared, and the vacuum tightness of the microwave chamber 2 satisfies the vacuum test requirement. The antenna 6 to be tested is arranged in the center of the microwave camera bellows 2, the rubber wave-absorbing material 1 for the vacuum environment is laid on the metal wall body 2 in the camera bellows and other devices needing wave absorption, an air suction opening 3 is formed in the side corner of the box body of the microwave camera bellows 2, the antenna is connected with an external vacuum pump after shielding treatment, the vacuum microwave test function can be realized after vacuumizing is completed, and in addition, the microwave camera bellows 2 is also required to be provided with a conventional shielding power supply opening 4, a shielding door 5 and the like.
In the embodiment, the tested reflection loss of the rubber wave-absorbing material for the vacuum environment in the frequency band of 2-40GHz is 25-45 dB. According to the outgassing rate evaluated by the GB/T34517-2017 spacecraft nonmetal material vacuum outgassing evaluation method, under the condition of pretreatment at 125 ℃, the vacuum degree of 24 hours is better than 710-3pa, the total mass loss is not more than 0.38%, the collected condensable volatile is not more than 0.05%, and the use standard of the spacecraft is met.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a vacuum microwave camera bellows with rubber absorbing structure which characterized in that: the device comprises a test auxiliary mechanism and a wave absorbing mechanism;
the test auxiliary mechanism comprises a microwave camera bellows (2), an air extraction opening (3), a shielding power supply opening (4), a shielding door (5) and an antenna (6), wherein the air extraction opening (3) is communicated and installed at the corner of the side wall of the microwave camera bellows (2), the shielding power supply opening (4) and the shielding door (5) are arranged on the side wall of the microwave camera bellows (2), and the antenna (6) is fixedly connected to the inner wall of the bottom of the microwave camera bellows (2);
wave-absorbing mechanism includes a plurality of rubber absorbing material (1), a plurality of the even rigid coupling of rubber absorbing material (1) is at the inner wall of rubber absorbing material (1), rubber absorbing material (1) is including inhaling ripples pyramid (101), heat conduction pyramid (102) and radiating bottom plate (103), the inner wall of one side laminating microwave camera bellows (2) of radiating bottom plate (103), the other one side rigid coupling of radiating bottom plate (103) has ripples pyramid (101) and heat conduction pyramid (102) of inhaling, inhale ripples pyramid (101) with the inside of heat conduction pyramid (102) is hollow structure, the inner wall of inhaling ripples pyramid (101) is cup jointed in heat conduction pyramid (102).
2. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the wave-absorbing pyramid (101) and the heat-conducting pyramid (102) are of rectangular pyramid structures in external shapes.
3. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the heat dissipation bottom plate (103) is a flat plate with a tetragonal structure, and the central axes of the wave absorption pyramid (101) and the heat conduction pyramid (102) penetrate through the central point of the heat dissipation bottom plate (103).
4. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the antenna (6) is positioned in the center of the interior of the microwave dark box (2).
5. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the thickness of the side wall of the wave-absorbing pyramid (101) is the same as that of the heat-conducting pyramid (102).
6. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the thickness of the heat dissipation bottom plate (103) is twice of the thickness of the side wall of the wave-absorbing pyramid (101).
7. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the microwave camera bellows (2) is a sealing structure.
8. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the hollow structures in the wave absorbing pyramid (101) and the heat conducting pyramid (102) are all in a quadrangular pyramid shape.
9. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the wave-absorbing pyramid (101), the heat-conducting pyramid (102) and the heat-radiating bottom plate (103) are tightly attached to form a sealing structure.
10. The vacuum microwave dark box with the rubber wave-absorbing structure as claimed in claim 1, wherein: the wave-absorbing pyramid (101) and the heat-conducting pyramid (102) are of rectangular pyramid structures with different sizes and similar shapes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921032730.4U CN210604701U (en) | 2019-07-03 | 2019-07-03 | Vacuum microwave camera bellows with rubber absorbing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921032730.4U CN210604701U (en) | 2019-07-03 | 2019-07-03 | Vacuum microwave camera bellows with rubber absorbing structure |
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| CN210604701U true CN210604701U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544697A (en) * | 2022-02-08 | 2022-05-27 | 北京卫星环境工程研究所 | Heat dissipation device for vacuum thermal test and enhanced heat dissipation method thereof |
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2019
- 2019-07-03 CN CN201921032730.4U patent/CN210604701U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544697A (en) * | 2022-02-08 | 2022-05-27 | 北京卫星环境工程研究所 | Heat dissipation device for vacuum thermal test and enhanced heat dissipation method thereof |
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