High-power box type multifunctional composite antenna thermal control system

Abstract

The invention provides a high-power box type multifunctional composite antenna thermal control system which comprises a box type composite antenna, a high-power single machine, a waveguide assembly and a graphite film. The box type composite antenna comprises a heat dissipation box body, two sets of high-power single machines are installed on the inner side of the heat dissipation box body through heat expansion plates respectively, a graphite film is pasted on any high-power single machine and extends to the heat dissipation face of the heat dissipation box body, and the graphite films on the two sets of high-power single machines are connected. The waveguide assembly comprises a waveguide and a waveguide support, a heat conduction copper cable is connected between the waveguide and the waveguide support, and integrated cooling fins are arranged on the waveguide. The effective heat dissipation area of a single machine is increased through the graphite film, and the heat dissipation capacity is effectively enhanced; the mechanical property of the waveguide assembly in the feed source is enhanced through the heat-conducting copper cable, and the temperature level of the waveguide in the feed source is reduced; the temperature level of the antenna in the working period is reduced by enhancing the heat dissipation capability of the high-power single machine and the waveguide assembly; the whole device is high in reliability and high in process realizability.

Description

Technical Field

[0001] The present invention relates to the field of spacecraft technology, and in particular to a high-power box-type multifunctional composite antenna thermal control system. Background Art

[0002] With the development of satellite space missions, on the one hand, spacecraft mission modes are becoming more and more diverse, on-orbit maneuvers are becoming more frequent, and the changes in extra-orbital heat flow are becoming more complex; on the other hand, there are more and more extravehicular two-dimensional mechanism motion loads, and the power consumption is increasing, and the functions are becoming more and more diverse. Traditional thermal control measures are difficult to meet the heat dissipation needs of the loads.

[0003] Due to the rotational characteristics of the extravehicular two-dimensional mechanism-type motion load, the illumination of each component of the mechanism is relatively complex; at the same time, some antennas adopt a box-type structure, which is used to install high-power stand-alone devices on the antenna. The box-type structure of the antenna can prevent some components from being directly exposed to the sun, but due to size limitations, the size of a single heat sink of a general box-type antenna cannot meet the heat dissipation requirements of a high-power stand-alone device. In addition, the heat consumption of the antenna feed network component is very large, and the power density of the combiner exceeds 600W / m2. The feed network component has a very large demand for heat dissipation, and it is difficult to reduce the temperature level of the waveguide component by relying on the heat dissipation surface of the waveguide component itself.

[0004] The existing Chinese patent with publication number CN107167774A discloses a thermal control system for a double-side-view high-power and high-heat-flux planar phased array antenna, which includes a transmitting and receiving chip assembly and a pre-buried area of ​​a phase-change heat pipe installed on a structural honeycomb panel. The phase-change heat pipe adopts an aluminum-ammonia phase-change heat pipe, which has the effect of equalizing the temperature and suppressing the temperature rise of the transmitting and receiving chip assembly; a thermal conductive filler is provided between the transmitting and receiving chip assembly and the pre-buried heat pipe area of ​​the honeycomb panel to increase the contact heat conduction between the transmitting and receiving chip assembly and the phase-change heat pipe. This existing patent mainly adopts traditional thermal control measures such as phase-change heat pipes.

[0005] The existing Chinese patent with publication number CN107995825A discloses a heat pipe-based lightweight heat dissipation system for satellite high heat consumption single machine, comprising: a heat dissipation plate; a high heat consumption single machine, the high heat consumption single machine is installed on the inner surface of the heat dissipation plate; and a pre-buried heat pipe, the pre-buried heat pipe is arranged in the heat dissipation plate, and the number of the pre-buried heat pipes is three. The existing patent mainly uses a heat pipe network to dissipate heat for a high power consumption single machine.

[0006] Therefore, the inventors believe that the thermal control measures in the prior art are difficult to meet the heat dissipation requirements of high-power box-type multifunctional composite antennas, and it is necessary to provide a thermal control system that can enhance the heat dissipation capabilities of high-power stand-alone units and waveguide components. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a high-power box-type multifunctional composite antenna thermal control system.

[0008] A high-power box-type multifunctional composite antenna thermal control system provided by the present invention comprises: a box-type composite antenna, a high-power stand-alone and waveguide component, and a graphite film;

[0009] The box-type composite antenna includes a heat dissipation box, and the two groups of high-power units are respectively installed on the inner side of the heat dissipation box through heat expansion plates, and the graphite film is pasted on any of the high-power units, and the graphite film extends to the heat dissipation surface of the heat dissipation box, and the graphite films on the two groups of high-power units are connected;

[0010] The waveguide component comprises a waveguide and a waveguide bracket, a heat-conducting copper cable is connected between the waveguide and the waveguide bracket, and an integrated heat dissipation fin is arranged on the waveguide.

[0011] Preferably, it also includes a thermal control component, which includes an electric heater, and a plurality of the electric heaters are respectively installed on the driving component, the rotating joint and the pyrotechnic unlocking device of the box-type composite antenna.

[0012] Preferably, the two groups of high-power single machines are respectively installed on two different inner walls of the heat dissipation box.

[0013] Preferably, the graphite film is pasted on the outer side of the shell of the high-power stand-alone machine, and the other end of the graphite film is pasted on the inner wall of the heat dissipation box.

[0014] Preferably, the graphite films on the two groups of the high-power single machines are connected via a second graphite film, and the second graphite film is respectively superimposed on the two graphite films.

[0015] Preferably, the integrated heat dissipation fins are rectangular fins formed by integrated processing and having a thickness not exceeding mm, and the fins are connected to the mounting flange surfaces at the front and rear ends of the waveguide.

[0016] Preferably, the two ends of the thermally conductive copper cable are connected to the waveguide and the waveguide bracket by screws, and the mounting surfaces at both ends of the thermally conductive copper cable are coated with thermally conductive fillers, and the area of ​​the mounting surfaces at both ends of the thermally conductive copper cable is not less than 3 cm 2 The cross-section of the thermally conductive copper wire is rectangular, and the cross-sectional area is not less than 0.2 cm 2 .

[0017] Preferably, the base material of the thermally conductive copper cable comprises metallic copper or a copper alloy.

[0018] Preferably, an OSR heat sink is pasted on the outer side of the heat dissipation box or a coating is sprayed thereon, and the coating includes ACR-lg white paint.

[0019] Preferably, the box-type composite antenna further comprises an antenna mechanism and a reflecting surface, and both the antenna mechanism and the reflecting surface are sprayed with a coating, and the coating comprises ACR-lg white paint.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention connects the high-power single machines on both sides of the heat dissipation box body through an externally attached spliced ​​high-thermal conductivity graphite film heat dissipation device, thereby increasing the effective heat dissipation area of ​​the single machine and effectively enhancing the heat dissipation capacity; the mechanical and thermal integrated thermal conductive copper cable is used to enhance the mechanical properties of the waveguide component in the feed source, while enhancing the longitudinal thermal conductivity of high-power waveguides such as combiners, thereby reducing the temperature level of the waveguide in the feed source; an aluminum alloy heat expansion plate, a heater, and a thermal control coating are used to ensure that the temperature of each component is within the index range; the high-power box-type multifunctional composite antenna can adapt to the drastic fluctuation of the external heat flow during the satellite's on-orbit maneuvers, thereby enhancing the heat dissipation capacity of the high-power single machine and the waveguide component, and reducing the temperature level of the antenna during operation; the entire device has high reliability and high process feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 This is a structural schematic diagram of a high-power box-type multifunctional composite antenna mainly embodied in the present invention;

[0024] Figure 2 This is a schematic diagram of a heat dissipation solution for a high-power stand-alone machine mainly embodied in the present invention;

[0025] Figure 3 This is a schematic diagram of the connection of the externally attached spliced ​​high thermal conductivity graphite film mainly embodied in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the mechanical and thermal integrated thermal conductive copper cable mainly embodied in the present invention.

[0027] As shown in the figure:

[0028] Antenna mechanism 1 Heat dissipation box 2 Reflection surface 3

[0029] High power single machine 4 Heat spreading plate 5 Graphite film 6

[0030] Waveguide 7 Thermal Conductive Copper Cable 8 Waveguide Bracket 9

[0031] First graphite film 61 Second graphite film 62 Third graphite film 63 DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] like Figure 1-4 As shown, a high-power box-type multifunctional composite antenna thermal control system provided according to the present invention includes: a box-type composite antenna, a high-power single machine 4 and a waveguide component, and a graphite film 6; the box-type composite antenna includes a heat dissipation box 2, and two groups of high-power single machines 4 are respectively installed on the inner side of the heat dissipation box 2 through a heat expansion plate 5, and a high-thermal conductivity graphite film 6 is pasted on any high-power single machine 4, and the graphite film 6 extends to the heat dissipation surface of the heat dissipation box 2, and the graphite films 6 on the two groups of high-power single machines 4 are connected; the waveguide component includes a waveguide 7 and a waveguide bracket 9, and a thermal conductive copper cable 8 is connected between the waveguide 7 and the waveguide bracket 9, which is used to increase the heat dissipation of the high-power waveguide 7 and reduce the temperature level of the waveguide 7 when it is working; an integrated heat dissipation fin is arranged on the waveguide 7 to increase the heat dissipation area of ​​the waveguide 7.

[0034] The present application also includes a thermal control component, which includes an electric heater, and multiple electric heaters are respectively installed on the driving component, rotating joint, and pyrotechnic unlocking device of the box-type composite antenna. For components with high internal temperature requirements of the antenna, such as the driving component, rotating joint, pyrotechnic unlocking device, and high-power stand-alone, electric heaters are used to maintain the temperature level of the antenna when it is not working.

[0035] The box-type composite antenna also includes an antenna mechanism 1 and a reflective surface 3. The antenna mechanism 1, the reflective surface 3 and other components exposed to outer space are sprayed with a coating with low solar radiation absorption rate and high infrared emissivity, such as ACR-1g white paint.

[0036] The heat expansion plate 5 is heat-conductingly installed on the heat dissipation box 2, and the high-power single machine 4 is heat-conductingly installed on the heat expansion plate 5. The side of the heat dissipation plate 2 facing the outer space is a coating with low solar radiation absorption rate and high infrared emissivity, such as OSR heat sink, ACR-1g white paint, etc.

[0037] The heat dissipation box 2 is composed of 5 aluminum-skinned carbon fiber plates, which form a closed space with the reflective surface 3; the waveguide components in the box are fixed to the heat dissipation box 2 through a bracket; the single machine and waveguide components in the box are sprayed with SR107-E51 black paint, and OSR heat sinks are pasted on the outside of the high-frequency component box.

[0038] The two groups of high-power stand-alone machines 4 are respectively installed on two different inner walls of the heat dissipation box 2. One side of the high thermal conductivity graphite film 6 is thermally conductively pasted on the shell side wall of the high-power stand-alone machine 4, and the other side is thermally conductively pasted on the inner surface of the heat dissipation box 2. The high thermal conductivity graphite films 6 attached to the two groups of high-power stand-alone machines 4 realize heat exchange by overlapping. The graphite films 6 on the two groups of high-power stand-alone machines 4 are connected by the second graphite film 62. The graphite films 6 of the two groups of high-power stand-alone machines 4 are respectively the first graphite film 61 and the third graphite film 63, and the second graphite film 62 is overlapped with the first graphite film 61 and the third graphite film 63. That is, the gap between the first graphite film 61 and the third graphite film 63 is achieved by overlapping the second graphite film 62 to realize the connection of the first graphite film 61 and the third graphite film 63 on both sides, and the heat of the two groups of high-power stand-alone machines 4 can be exchanged with each other.

[0039] An integrated heat sink fin is processed on the waveguide 7 in the antenna feed to enhance the heat dissipation capacity of the waveguide 7 in the feed. The integrated heat sink fin is an integrated rectangular fin with a thickness not exceeding 1 mm, and the fin is connected to the mounting flange surfaces at the front and rear ends of the waveguide 7.

[0040] Four mechanical and thermal integrated thermal copper cables 8 are added between the waveguide 7 and the waveguide bracket 9 at the bottom of the feed source to enhance the longitudinal heat conduction of the combiner and reduce the temperature level of the combiner. The base material of the mechanical and thermal integrated thermal copper cables 8 is metal copper or copper alloy with high thermal conductivity. The two ends of the thermal copper cables 8 are connected to the waveguide 7 and the waveguide bracket 9 by screws respectively. The mounting surfaces at both ends of the thermal copper cables 8 are coated with thermal conductive fillers. The area of ​​the mounting surfaces at both ends of the thermal copper cables 8 is not less than 3cm 2 The cross section of the heat-conducting copper wire 8 is rectangular, and the cross-sectional area is not less than 0.2 cm 2 The heat-conducting copper cable 8 can support the waveguide 7 and enhance the mechanical properties of the structure. Meanwhile, the heat-conducting copper cable 8 connects the high-power waveguide 7 and the waveguide bracket 9, enhances the heat transfer from the waveguide 7 to the waveguide bracket 9, and reduces the temperature level of the waveguide 7 when it is working.

[0041] The present application can effectively increase the heat dissipation area of ​​the high-power single machine 4 through the external spliced ​​high-thermal conductivity graphite film heat dissipation device; realize the heat exchange of two groups of high-power single machines 4 through the external spliced ​​high-thermal conductivity graphite film heat dissipation device, reduce the heating compensation power when the two groups of single machines work crosswise, and reduce the temperature level of the working single machine; the use of mechanical and thermal integrated thermal conductive copper rope 8 can enhance the mechanical properties of the waveguide component; the mechanical and thermal integrated thermal conductive copper rope 8 can enhance the longitudinal heat dissipation between the high-power waveguide 7 and the waveguide bracket 9, and reduce the temperature level of the waveguide component; the whole set of equipment has high reliability, high innovation, and high process feasibility.

[0042] This application uses the Ka transmitter as an example. The working mode of the high-power box-type multifunctional composite antenna is complex. The heat consumption of the waveguide feed network in the working mode with the maximum heat consumption exceeds 150W. The combiner weighs about 100g, and the heat consumption is 18.5W; the heat consumption of two sets of Ka transmitters is 160W when working at the same time; the temperature of the waveguide switch, duplexer, etc. in the waveguide feed network cannot exceed 90℃, the temperature of the combiner cannot exceed 110℃, and the temperature of the Ka transmitter cannot exceed 75℃. The antenna has a very large demand for heat dissipation.

[0043] Two groups of Ka transmitters inside the box are respectively installed on the +Y side panel and -Y side panel of the heat dissipation box 2; the installation surface of the Ka transmitter is provided with an aluminum alloy heat expansion plate 5, and a high thermal conductivity graphite film 6 is pasted on the side of the transmitter shell, and the other end of the graphite film 6 is connected to the +X side panel of the heat dissipation box 2, which can effectively increase the heat dissipation surface area of ​​the Ka transmitter and reduce the temperature level of the Ka transmitter during operation.

[0044] Then use a piece of graphite film 6 to splice the graphite films 6 of the two groups of transmitters to form a heat transfer link in the 2±Y direction of the heat dissipation box. This can enhance the heat exchange of the two groups of transmitters. When one set of transmitters is not working, the heat of the working transmitter can be transferred to the non-working transmitter, which can not only reduce the temperature of the working transmitter, but also reduce the heating compensation power of the non-working transmitter. At the same time, the high thermal conductivity graphite film 6 is stacked to increase the heat dissipation surface area of ​​the transmitter, which is beneficial to the heat dissipation of a single machine.

[0045] Heater temperature control is performed on components such as Ka transmitter, waveguide switch, and duplexer. The exposed parts on both sides of the main reflector 3 of the antenna are sprayed with ACR-1g white paint. The antenna feed is installed at the middle bottom of the main reflector. The outside of the feed support tube is sprayed with ACR-1g white paint, and the waveguide components inside the feed are sprayed with ACR-1g white paint.

[0046] This application has strong adaptability, good temperature control effect, and the temperature of high-power single-machine meets the index requirements. After applying this application, the following substantial progress has been achieved:

[0047] 1. When the antenna feed network is working continuously for a long time with the maximum heat consumption, the maximum temperature of the combiner is 99.0℃, which meets the index requirement of not exceeding 110℃;

[0048] 2. When the antenna 2 sets of Ka transmitters work continuously for a long time, the maximum temperature of the traveling wave tube is 72.4℃ and the maximum temperature of the power supply is 54.6℃, both of which meet the index requirements.

[0049] The externally attached spliced ​​high thermal conductivity graphite film heat dissipation device of the present application can be connected to the single machine on the ±Y side of the heat dissipation box 2, increasing the effective heat dissipation area of ​​the single machine, and effectively enhancing the heat dissipation capacity of the high-power single machine 4; the mechanical and thermal integrated thermal conductive copper rope 8 is used to enhance the mechanical properties of the waveguide components in the feed source, while enhancing the longitudinal thermal conductivity of high-power waveguides such as combiners, reducing the temperature level of the waveguide in the feed source, and comprehensively using aluminum alloy heat expansion plates 5, heaters, and thermal control coatings to ensure that the temperature of each component is within the index range. The present application enables the high-power box-type multifunctional composite antenna to adapt to the violent fluctuations of external heat flow during the satellite's in-orbit maneuvers, enhances the heat dissipation capacity of the high-power single machine 4 and waveguide components, and reduces the temperature level of the antenna during operation. The entire device has high reliability, high innovation, and high process feasibility.

[0050] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A high-power box-type multifunctional composite antenna thermal control system, characterized in that: include: Box-type composite antenna, high-power stand-alone (4) and waveguide assembly, graphite film (6); The box-type composite antenna comprises a heat dissipation box (2), two groups of high-power single units (4) are respectively installed on the inner side of the heat dissipation box (2) through heat expansion plates (5), the graphite film (6) is adhered to any of the high-power single units (4), and the graphite film (6) extends to the heat dissipation surface of the heat dissipation box (2), and the graphite films (6) on the two groups of high-power single units (4) are connected; The waveguide component comprises a waveguide (7) and a waveguide bracket (9); a heat-conducting copper cable (8) is connected between the waveguide (7) and the waveguide bracket (9); and an integrated heat dissipation fin is provided on the waveguide (7).

2. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: It also includes a thermal control component, which includes an electric heater. A plurality of the electric heaters are respectively installed on the driving component, the rotating joint and the pyrotechnic unlocking device of the box-type composite antenna.

3. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The two groups of high-power single machines (4) are respectively installed on two different inner side walls of the heat dissipation box (2).

4. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The graphite film (6) is adhered to the outer side of the shell of the high-power stand-alone machine (4), and the other end of the graphite film (6) is adhered to the inner side wall of the heat dissipation box (2).

5. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The graphite films (6) on the two groups of high-power single machines (4) are connected via a second graphite film (62), and the second graphite film (62) is respectively superimposed on the two graphite films (6).

6. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The integrated heat dissipation fins are rectangular fins formed by integrated processing and having a thickness not exceeding 1 mm, and the fins are connected to the mounting flange surfaces at the front and rear ends of the waveguide (7).

7. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The two ends of the heat-conducting copper cable (8) are respectively connected to the waveguide (7) and the waveguide bracket (9) by screws, and the mounting surfaces at both ends of the heat-conducting copper cable (8) are coated with heat-conducting fillers, and the areas of the mounting surfaces at both ends of the heat-conducting copper cable (8) are not less than 3 cm 2 The cross section of the heat-conducting copper wire (8) is rectangular, and the cross-sectional area is not less than 0.2 cm 2 .

8. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The base material of the thermally conductive copper cable (8) comprises metallic copper or a copper alloy.

9. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The outer side of the heat dissipation box (2) is pasted with an OSR heat sink or sprayed with a coating, wherein the coating includes ACR-1g white paint.

10. The high-power box-type multifunctional composite antenna thermal control system according to claim 1, characterized in that: The box-type composite antenna also includes an antenna mechanism (1) and a reflective surface (3), and both the antenna mechanism (1) and the reflective surface (3) are sprayed with a coating, and the coating includes ACR-1g white paint.

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