A folding fan type heat radiator for flat-panel satellite and its assembly and use method

Abstract

The present invention proposes a folding fan type heat radiator for a flat-panel satellite and its assembly and use method, which belongs to the field of thermal control technology of space products. The problem of poor heat dissipation capacity of existing flat-panel satellites is solved. The folding fan type heat radiator includes a radiator unit, a drive motor, a surface mounted heat pipe and a rotating shaft combination. The radiator unit includes a plurality of radiant cooling plates arranged in sequence along the vertical direction, wherein the topmost radiant cooling plate is the first radiant cooling plate, the bottommost radiant cooling plate is the third radiant cooling plate, and the rest are the second radiant cooling plates. The rotating shaft combination passes through all the rotating shaft holes and presses the radiator unit tightly. The top drive column is connected to the output end of the drive motor, and the drive motor and the satellite end mounting surface are connected to the satellite side of the flat-panel satellite. The lower surface of the heat dissipation surface of the third radiant cooling plate is provided with a surface mounted heat pipe, which is connected to the buried heat pipe in the satellite cabin of the flat-panel satellite. It is mainly used for heat dissipation of flat-panel satellites.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal control of space products, and in particular relates to a folding fan type heat radiator for a flat-panel satellite and an assembly and use method thereof. Background Art

[0002] In recent years, flat-panel satellites have gradually become an important configuration choice for communication satellites and synthetic aperture radar satellites due to their advantages such as light weight, large installation surface, and stackable launch. This type of satellite greatly reduces the weight and volume of the entire satellite while meeting the installation requirements of large-size payloads.

[0003] As the heat consumption of the payload continues to increase, the heat dissipation of flat-panel satellites has gradually become a problem. Traditional satellites usually use their own cabin panels as radiators to achieve heat exchange with the space environment. However, flat-panel satellites have a compact layout and can be roughly regarded as two-dimensional satellites. The number and size of cabin panels that can be used for heat dissipation are limited. Therefore, when the heat consumption of the payload increases to a certain extent, it is necessary to meet its thermal control needs through new thermal control measures.

[0004] Currently, alternative measures include deployable radiators and fluid loop radiators. The deployable radiator is folded on the surface of the satellite during the launch phase, and is unfolded after the satellite enters orbit to increase the heat dissipation surface to meet thermal control requirements. However, for flat-panel satellites, it is difficult to have enough space for the two cabin panels to be folded and fixed for the deployable radiator while meeting the requirements of the payload, solar panels, and platform equipment layout. The fluid loop radiator adopts active thermal control. The working fluid circulates under the drive of the pump, while absorbing and dissipating heat to dissipate and distribute heat. However, the fluid loop radiator has a complex composition, high cost, and low reliability. It will also increase the weight and power consumption of the satellite, and will produce micro-vibrations when the pump is working, affecting the accuracy of satellite attitude control. Summary of the invention

[0005] In view of this, the present invention aims to provide a folding fan type heat radiator for a flat-panel satellite and an assembly and use method thereof, so as to solve the problem of poor heat dissipation capacity of existing flat-panel satellites.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a folding fan type thermal radiator for a flat-panel satellite, which includes a radiator unit, a drive motor, a surface mounted heat pipe and a rotating shaft combination, wherein the radiator unit includes a plurality of radiant cooling plates arranged in sequence along the vertical direction, wherein the first radiant cooling plate is located at the top end of the radiator unit, the third radiant cooling plate is located at the bottom end of the radiator unit, and the rest are second radiant cooling plates, wherein the radiant cooling plates all have a mounting surface and a heat dissipation surface, wherein an angle exists between the mounting surface and the heat dissipation surface, a satellite end mounting surface is arranged on the side of the heat dissipation surface of the third radiant cooling plate, thermal conductive pads are arranged on the upper surfaces of the heat dissipation surfaces of the second and third radiant cooling plates, and upper fixing columns are connected to the upper surfaces of the mounting surfaces of the second and third radiant cooling plates , the lower surfaces of the mounting surfaces of the first and second radial cooling plates are both connected with lower fixing columns, the upper surface of the mounting surface of the first radial cooling plate is connected with a top driving column, the upper surface of the upper fixing column and the lower surface of the lower fixing column are both provided with limiting grooves and limiting protrusions, the limiting protrusions are embedded in adjacent limiting grooves, the mounting surface, the upper fixing column, the lower fixing column and the top driving column are all provided with shaft holes, the shaft assembly passes through all the shaft holes and presses the radiator unit, the top driving column is connected to the output end of the drive motor, the drive motor and the satellite end mounting surface are connected to the satellite side of the flat-panel satellite, the lower surface of the heat dissipation surface of the third radial cooling plate is provided with a surface-mounted heat pipe, and the surface-mounted heat pipe is connected to the heat pipe buried in the satellite cabin of the flat-panel satellite.

[0007] Furthermore, the drive motor is a brake motor, the output end of the drive motor is a rotating flange, the rotating flange is connected to the top drive column, and a fixed lug is provided on the side of the drive motor, and the fixed lug is connected to the satellite side of the flat-panel satellite.

[0008] Furthermore, the shaft assembly includes a shaft, a silicone pad and a nut. The shaft passes through all the shaft holes. A boss is provided at one end of the shaft and the other end is threadedly connected to the nut. Silicone pads are provided between the boss and the radiator unit and between the nut and the radiator unit.

[0009] Furthermore, the radiation cooling plate is an integrated structure, made of aluminum, formed by sheet metal or stamping, and the heat dissipation surface is sprayed with heat dissipation white paint.

[0010] Furthermore, the upper fixing column, the lower fixing column and the top driving column are all made of aluminum alloy, and the surface is coated with molybdenum disulfide.

[0011] Furthermore, the thermal pad is a gap-filled thermally conductive material.

[0012] Furthermore, the surface mount heat pipe mounting surface is coated with thermal grease.

[0013] Furthermore, the width of the limiting groove is greater than that of the limiting protrusion.

[0014] The present invention also provides an assembly method of a folding fan type heat radiator for a flat-panel satellite, specifically comprising: pasting a thermal pad on the upper surface of the heat dissipation surface of a second radiant cooling plate and a third radiant cooling plate, connecting a plurality of radiant cooling plates, an upper fixing column, a lower fixing column and a top driving column to obtain a radiator unit, installing the radiator unit on a rotating shaft assembly, connecting the top driving column to the output end of a driving motor, connecting the driving motor and a satellite end mounting surface to a satellite side of a flat-panel satellite, connecting a surface mounted heat pipe to a heat pipe buried in a satellite cabin panel of the flat-panel satellite, and installing the surface mounted heat pipe on the lower surface of the heat dissipation surface of the third radiant cooling plate.

[0015] The present invention also provides a method for using a folding fan type heat radiator for a flat-panel satellite, and the method for using the heat radiator includes the following three working conditions:

[0016] Working condition 1: When the flat-panel satellite enters the high heat consumption working mode from the orbiting mode or the low heat consumption working mode, the driving motor is energized in the forward direction, and the driving motor drives the first radiant cooling plate to rotate around the rotating shaft combination. During the rotation process, the inner side of the first radiant cooling plate and the outer side of the second radiant cooling plate gradually approach each other until they are in contact with each other. The rotation continues, and the adjacent radiant cooling plates undergo elastic deformation, squeezing the thermal pad in the middle. After the thermal pad is squeezed and deformed, it fully contacts the radiant cooling plates on both sides. During the rotation of the first radiant cooling plate, the limiting protrusion rotates synchronously in the embedded adjacent limiting groove until the limiting protrusion is in contact with the edge of the limiting groove. The first and second radiant cold plates are locked in position; the driving motor is continuously powered on, indirectly driving the second radiant cold plates to rotate around the rotating shaft combination, and the rotation process is consistent with the rotation process of the first radiant cold plate. The rotation and locking of all the second radiant cold plates are completed in sequence, and the folding fan type heat radiator is fully unfolded; after being fully unfolded, the adjacent radiant cold plates are fully in contact under the action of elastic deformation and thermal pads, realizing full-width thermal connection, and the internal heat of the flat-panel satellite is transferred to the surface mounted heat pipe, and the surface mounted heat pipe transfers the heat to the third radiant cold plate, and then to all radiant cold plates, and all radiant cold plates are used for heat dissipation;

[0017] Working condition 2: When the flat-panel satellite enters the low heat consumption working mode from the high heat consumption working mode, the driving motor is energized in the reverse direction, and the driving motor drives the radiator unit to rotate in the reverse direction around the rotating shaft combination. The first radiant cooling plate and the second radiant cooling plate are gradually separated from the elastic deformation state of the fit and restored to the original state until the limiting protrusion fits with the other side edge of the limiting groove, and the relative position of the first radiant cooling plate and the second radiant cooling plate is locked. The driving motor is continuously energized in the reverse direction, indirectly driving the second radiant cooling plate to rotate in the reverse direction around the rotating shaft combination. The rotation process is consistent with the rotation process of the first radiant cooling plate. The reverse rotation and locking of all the second radiant cooling plates are completed in sequence, and the folding fan type heat radiator is completely folded. After being completely folded, there is no direct contact between the radiant cooling plates, and the folding fan type heat radiator is in the low heat dissipation mode.

[0018] Working condition 3: When the flat-panel satellite enters the non-full-power working mode with moderate heat consumption, the folding fan-type heat radiator is in a semi-expanded state according to the required heat dissipation area. The folding fan-type heat radiator is fully expanded according to working condition 1, and then folded according to working condition 2. When it is folded to the middle state, the drive motor is powered off. At this time, the folding fan-type heat radiator is in a state where some radiant cooling plates are expanded and some are closed.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a folding fan-type thermal radiator for a flat-panel satellite and an assembly and use method thereof, which can be compactly folded to the side of the flat-panel satellite without occupying the satellite cabin layout space while ensuring that a sufficiently large heat dissipation surface is provided after unfolding, and at the same time, the heat dissipation surface area can be adjusted in orbit to adapt to different satellite operating conditions.

[0020] The specific advantages are as follows:

[0021] (1) The fan-shaped heat radiator of the present invention can provide a larger area for radiation heat dissipation after being unfolded, which is beneficial to the heat dissipation of high-power satellites such as communication satellites and synthetic aperture radar satellites.

[0022] (2) The fan-shaped thermal radiator of the present invention can be compactly folded into the narrow side of the flat-panel satellite during the launch phase, occupying a small space, thereby improving the space utilization of the carrier fairing.

[0023] (3) The fan-shaped heat radiator described in the present invention can be repeatedly unfolded and folded. When the satellite is in orbit, the state of the heat radiator can be adjusted according to the change of the working mode to meet the heat dissipation demand.

[0024] (4) The fan-shaped heat radiator described in the present invention has a semi-expanded state. When the satellite is not working at full power, the expanded heat dissipation area can be adjusted according to the specific heat consumption to meet the heat dissipation demand.

[0025] (5) The folding fan type heat radiator described in the present invention is a passive thermal control measure. Except for the need to energize the drive motor during the unfolding and folding processes, the heat dissipation process does not require increasing the power consumption of the entire satellite.

[0026] (6) The fan-shaped heat radiator described in the present invention has a simple structure and high reliability, does not use a fluid circuit, and will not affect the satellite attitude control.

[0027] (7) The locking of the fan-shaped heat radiator in the unfolded and folded states is achieved by the mutual engagement between the driving motor and the parts. No additional unlocker and locker are required, the cost is low, the impact of unfolding and folding is small, and the impact on the satellite and on-board equipment is small.

[0028] (8) The components of the folding fan type heat radiator described in the present invention are simple in design and have low precision requirements, which can reduce processing costs and shorten processing cycles. The main structure is a radiation cooling plate, which is made of aluminum sheet metal or stamping, and has a low cost.

[0029] (9) The various parts of the folding fan type heat radiator described in the present invention are independent of each other and can be redesigned / selected according to the specific needs of the satellite, and the device has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the front structure of a folding fan type heat radiator for a flat-panel satellite according to the present invention;

[0032] Figure 2 This is a schematic diagram of the back structure of a folding fan type heat radiator for a flat-panel satellite according to the present invention;

[0033] Figure 3 This is a schematic diagram of the first radiant cooling plate connection structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the second radiant cooling plate connection structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the third radiant cooling plate connection structure of the present invention;

[0036] Figure 6 It is a schematic diagram of the composition structure of the first radiant cooling plate and the second radiant cooling plate of the present invention;

[0037] Figure 7 This is a schematic diagram of the composition structure of the third radiant cooling plate of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the upper fixed column of the present invention;

[0039] Fig. 9 This is a schematic diagram of the structure of the lower fixed column of the present invention;

[0040] Fig.10 This is a schematic diagram of the top drive column structure of the present invention;

[0041] Fig.11 This is a schematic diagram of the structure of the driving motor according to the present invention;

[0042] Fig.12 It is a schematic diagram of the rotating shaft assembly structure of the present invention;

[0043] Fig.13 The schematic diagram of the assembly process of the folding fan type heat radiator for flat-panel satellites according to the present invention is as follows Figure 1 ;

[0044] Fig.14 The schematic diagram of the assembly process of the folding fan type heat radiator for flat-panel satellites according to the present invention is as follows Figure 2 ;

[0045] Fig.15 The schematic diagram of the assembly process of the folding fan type heat radiator for flat-panel satellites according to the present invention is as follows Figure 3 ;

[0046] Fig.16 The schematic diagram of the assembly process of the folding fan type heat radiator for flat-panel satellites according to the present invention is as follows Figure 4 ;

[0047] Fig.17 Schematic diagram of the unfolding process of a folding fan type heat radiator for a flat-panel satellite according to the present invention Figure 1 ;

[0048] Fig.18 Schematic diagram of the unfolding process of a folding fan type heat radiator for a flat-panel satellite according to the present invention Figure 2 ;

[0049] Fig.19 Schematic diagram of the unfolding process of a folding fan type heat radiator for a flat-panel satellite according to the present invention Figure 3 ;

[0050] Fig. 20 This is a schematic diagram of a folding fan type heat radiator for a flat-panel satellite according to the present invention in an unfolded state;

[0051] Fig.21 The folding process of the folding fan type heat radiator for flat-panel satellites according to the present invention is shown in FIG. Figure 1 ;

[0052] Fig. 22 The folding process of the folding fan type heat radiator for flat-panel satellites according to the present invention is shown in FIG. Figure 2 ;

[0053] Fig.23 This is a schematic diagram of a folding fan type heat radiator for a flat-panel satellite according to the present invention in a folded state;

[0054] Fig.24 This is a schematic diagram of a folding fan type heat radiator for a flat-panel satellite according to the present invention in a semi-expanded state.

[0055] In the figure:

[0056] 1- radiator unit, 2- drive motor, 3- surface mount heat pipe, 4- shaft assembly, 5- flat satellite, 6- first radiant cold plate, 7- second radiant cold plate, 8- third radiant cold plate, 9- mounting surface, 10- shaft hole, 11- heat dissipation surface, 12- upper fixing column, 13- limiting groove, 14- limiting protrusion, 15- lower fixing column, 16- thermal pad, 17- top driving column, 18- satellite end mounting surface, 19- rotating flange, 20- fixing ear, 21- shaft, 22- silicone pad, 23- nut, 24- satellite cabin plate, 25- satellite side. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0058] See also Figure 1-24 The present embodiment is described, a folding fan type heat radiator for a flat-panel satellite, comprising a radiator unit 1, a drive motor 2, a surface mounted heat pipe 3 and a rotating shaft assembly 4, wherein the radiator unit 1 comprises a plurality of radiant cooling plates arranged in sequence along a vertical direction, wherein the topmost radiant cooling plate 6 is located at the top of the radiator unit 1, the third radiant cooling plate 8 is located at the bottommost radiant cooling plate 1, and the rest are second radiant cooling plates 7, wherein the radiant cooling plates all have a mounting surface 9 and a heat dissipation surface 11, wherein an angle exists between the mounting surface 9 and the heat dissipation surface 11, a satellite end mounting surface 18 is arranged on the side of the heat dissipation surface 11 of the third radiant cooling plate 8, a thermal pad 16 is arranged on the upper surface of the heat dissipation surface 11 of the second radiant cooling plate 7 and the third radiant cooling plate 8, an upper fixing column 12 is connected to the upper surface of the mounting surface 9 of the second radiant cooling plate 7 and the third radiant cooling plate 8, and the first radiant cooling plate 6 and the second radiant cooling plate 7 are connected to the upper surface of the mounting surface 9 of the second radiant cooling plate 7 and the third radiant cooling plate 8. The lower surface of the mounting surface 9 is connected with a lower fixing column 15, the upper surface of the mounting surface 9 of the first radiant cooling plate 6 is connected with a top driving column 17, the upper surface of the upper fixing column 12 and the lower surface of the lower fixing column 15 are provided with a limiting groove 13 and a limiting protrusion 14, and the limiting protrusion 14 is embedded in the adjacent limiting groove 13, and the mounting surface 9, the upper fixing column 12, the lower fixing column 15 and the top driving column 17 are provided with a shaft hole 10, the shaft assembly 4 passes through all the shaft holes 10 and presses the radiator unit 1, the top driving column 17 is connected to the output end of the drive motor 2, the drive motor 2 and the satellite end mounting surface 18 are connected to the satellite side 25 of the flat-panel satellite 5, and the lower surface of the heat dissipation surface 11 of the third radiant cooling plate 8 is provided with a surface-mounted heat pipe 3, and the surface-mounted heat pipe 3 is connected to the buried heat pipe in the satellite cabin 24 of the flat-panel satellite 5.

[0059] The assembly method of this embodiment is as follows: a thermal pad 16 is pasted on the upper surface of the heat dissipation surface 11 of the second and third radiant cooling plates 7 and 8, a plurality of radiant cooling plates, an upper fixing column 12, a lower fixing column 15 and a top driving column 17 are connected to obtain a radiator unit 1, the radiator unit 1 is installed on the shaft assembly 4, the top driving column 17 is connected to the output end of the drive motor 2, the drive motor 2 and the satellite end mounting surface 18 are connected to the satellite side 25 of the flat-panel satellite 5, the surface mounted heat pipe 3 is connected to the buried heat pipe in the satellite cabin board 24 of the flat-panel satellite 5, and the surface mounted heat pipe 3 is installed on the lower surface of the heat dissipation surface 11 of the third radiant cooling plate 8.

[0060] The method of using the heat radiator described in this embodiment includes the following three working conditions:

[0061] Working condition 1: When the flat-panel satellite 5 enters the high heat consumption working mode from the orbiting mode or the low heat consumption working mode, the driving motor 2 is energized in the forward direction, and the driving motor 2 drives the first radiant cooling plate 6 to rotate around the rotating shaft assembly 4. During the rotation process, the inner side of the first radiant cooling plate 6 and the outer side of the second radiant cooling plate 7 gradually approach each other until they are in contact with each other. The rotation continues, and the adjacent radiant cooling plates undergo elastic deformation, squeezing the middle thermal pad 16. After the extrusion and deformation, the thermal pad 16 fully contacts the radiant cooling plates on both sides. During the rotation process of the first radiant cooling plate 6, the limiting protrusion 14 rotates synchronously in the embedded adjacent limiting groove 13 until the limiting protrusion 14 and the limiting groove 13 are in contact with each other. The edges are fitted, and the positions of the first radiant cooling plate 6 and the second radiant cooling plate 7 are locked; the driving motor 2 is continuously energized, indirectly driving the second radiant cooling plate 7 to rotate around the rotating shaft assembly 4, and the rotation process is consistent with the rotation process of the first radiant cooling plate 6, and the rotation and locking of all the second radiant cooling plates 7 are completed in sequence, and the folding fan type heat radiator is fully unfolded; after being fully unfolded, the adjacent radiant cooling plates are fully in contact under the action of elastic deformation and thermal pad 16, realizing full-width thermal connection, and the internal heat of the flat-panel satellite 5 is transferred to the surface mounted heat pipe 3, and the surface mounted heat pipe 3 transfers the heat to the third radiant cooling plate 8, and then to all radiant cooling plates, and all radiant cooling plates are used for heat dissipation;

[0062] Working condition 2: when the flat-panel satellite 5 enters the low heat consumption working mode from the high heat consumption working mode, the driving motor 2 is energized in the reverse direction, and the driving motor 2 drives the radiator unit 1 to rotate in the reverse direction around the rotating shaft assembly 4, and the first radiant cooling plate 6 and the second radiant cooling plate 7 are gradually separated from the elastic deformation state of the fit and restored to the original state, until the limiting protrusion 14 fits with the other side edge of the limiting groove 13, and the relative positions of the first radiant cooling plate 6 and the second radiant cooling plate 7 are locked, and the driving motor 2 is continuously energized in the reverse direction, indirectly driving the second radiant cooling plate 7 to rotate in the reverse direction around the rotating shaft assembly 4, and the rotation process is consistent with the rotation process of the first radiant cooling plate 6, and the reverse rotation and locking of all the second radiant cooling plates 7 are completed in sequence, and the folding fan type heat radiator is completely folded; after being completely folded, there is no direct contact between the radiant cooling plates, and the folding fan type heat radiator is in the low heat dissipation mode;

[0063] Working condition 3: When the flat-panel satellite 5 enters the non-full-power working mode with moderate heat consumption, the folding fan-type heat radiator is in a semi-expanded state according to the required heat dissipation area. The folding fan-type heat radiator is fully expanded according to working condition 1, and then folded according to working condition 2. When it is folded to the intermediate state, the drive motor 2 is powered off. At this time, the folding fan-type heat radiator is in a state where some radiant cooling plates are expanded and some radiant cooling plates are closed.

[0064] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0065] like Figure 1 and Figure 2 As shown, a folding fan type heat radiator for a flat-panel satellite comprises a radiator unit 1, a driving motor 2, a surface mounted heat pipe 3 and a rotating shaft assembly 4, wherein the radiator unit 1 is connected via the rotating shaft assembly 4, the driving motor 2 is connected to the radiator unit 1, and the radiator unit 1 is connected to the surface mounted heat pipe 3. The radiator unit 1 comprises a plurality of radiant cooling plates arranged in sequence along the vertical direction, wherein the topmost radiant cooling plate 6 is located at the top of the radiator unit 1, the third radiant cooling plate 8 is located at the bottom of the radiator unit 1, and the rest are second radiant cooling plates 7.

[0066] like Figure 3-Figure 7 As shown, the radiant cooling plates all have a mounting surface 9 and a heat dissipation surface 11, and there is an angle between the mounting surface 9 and the heat dissipation surface 11, which is manifested in that the outer side of the heat dissipation surface 11 is higher than the inner side after installation, a satellite mounting surface 18 is arranged on the side of the heat dissipation surface 11 of the third radiant cooling plate 8, a thermal pad 16 is arranged on the upper surface of the heat dissipation surface 11 of the second radiant cooling plate 7 and the third radiant cooling plate 8, an upper fixing column 12 is connected to the upper surface of the mounting surface 9 of the second radiant cooling plate 7 and the third radiant cooling plate 8, a lower fixing column 15 is connected to the lower surface of the mounting surface 9 of the first radiant cooling plate 6 and the second radiant cooling plate 7, and a top driving column 17 is connected to the upper surface of the mounting surface 9 of the first radiant cooling plate 6.

[0067] The radiation cooling plate is an integrated structure, made of aluminum, formed by sheet metal or stamping, and its hardness and elasticity are increased by heat treatment. It can be prepared and formed through simple processing steps. Except for the contact area and the installation area, the rest of the heat dissipation surface 11 is sprayed with heat dissipation white paint.

[0068] like Figure 8-Figure 10As shown, the upper surface of the upper fixing column 12 and the lower surface of the lower fixing column 15 are both provided with a limiting groove 13 and a limiting protrusion 14. The lower fixing column 15 has a mounting countersunk hole for mounting the connector. The limiting protrusion 14 is embedded in the adjacent limiting groove 13. All limiting grooves 13 have the same size, all limiting protrusions 14 have the same size, and the width of the limiting groove 13 is greater than the limiting protrusion 14. Therefore, the limiting protrusion 14 has a certain degree of freedom when embedded in the limiting groove 13. The mounting surface 9, the upper fixing column 12, the lower fixing column 15 and the top driving column 17 are all provided with a rotating shaft hole 10. The upper fixing column 12, the lower fixing column 15 and the top driving column 17 are all made of aluminum alloy, and the surface is coated with molybdenum disulfide, which has the effect of reducing mutual friction and avoiding vacuum cold welding.

[0069] like Fig.11 As shown, the drive motor 2 is a brake motor, and the output end of the drive motor 2 is a rotating flange 19, which is connected to the top drive column 17. The drive motor 2 can rotate in the reverse direction when reverse power is supplied, and a fixing lug 20 is provided on the side of the drive motor 2, and the fixing lug 20 is connected to the satellite side 25 of the flat-panel satellite 5.

[0070] like Fig.12 As shown, the shaft assembly 4 includes a shaft 21, a silicone pad 22 and a nut 23. The shaft 21 passes through all shaft holes 10. One end of the shaft 21 is provided with a boss, and the other end is screwed to the nut 23. A silicone pad 22 is provided between the boss and the radiator unit 1 and between the nut 23 and the radiator unit 1. Since the silicone pad 22 has high elasticity, each radiant cooling plate in the radiator unit 1 can still rotate around the shaft 21 under the premise of ensuring that it does not loosen.

[0071] The thermal pad 16 described in this embodiment is a high-performance gap-filling thermal conductive material with good viscosity, flexibility, compression performance and thermal conductivity. After being extruded and deformed, the thermal pad 16 fully contacts the radiation cooling plates on both sides, and can achieve a heat conduction effect between the radiation cooling plates. The thermal pad 16 is attached to the heat dissipation surface 11 of the second radiation cooling plate 7 and the third radiation cooling plate 8 by thermal conductive adhesive.

[0072] In this embodiment, a surface-mounted heat pipe 3 is provided on the lower surface of the heat dissipation surface 11 of the third radiant cooling plate 8. The surface-mounted heat pipe 3 is connected to the buried heat pipe in the satellite cabin panel 24 of the flat-panel satellite 5, and can export the heat from the large heat consumption area on the surface of the satellite cabin panel 24. The mounting surface of the surface-mounted heat pipe 3 is coated with thermal grease.

[0073] The specific assembly method of this embodiment is: according to the structure of a folding fan type heat radiator for a flat-panel satellite in the above embodiment, the connection of the radiator unit 1 is completed, such as Figure 3-Figure 5As shown, a thermal pad 16 is attached to the upper surface of the heat dissipation surface 11 of the second and third radiant cooling plates 7 and 8, and multiple radiant cooling plates, upper fixing columns 12, lower fixing columns 15 and top driving columns 17 are connected. Then, the radiator unit 1 is installed on the rotating shaft assembly 4, as shown in FIG. Fig.13 As shown, a silicone pad 22 is placed on the boss of the shaft 21, the shaft 21 is passed through all the shaft holes 10, a silicone pad 22 is placed under the nut 23, and then the nut 23 is screwed and tightened with the shaft 21. Since the silicone pad 22 has high elasticity, each radiant cooling plate in the radiator unit 1 can still rotate around the shaft 21 without being loosened. Fig.14 As shown, the top drive column 17 is connected to the rotating flange 19 of the drive motor 2, so that the drive motor 2 is installed on the top of the radiator unit 1. Fig.15 As shown, the fixed lug 20 of the drive motor 2 and the satellite end mounting surface 18 are connected to the satellite side 25 of the flat-panel satellite 5 through standard parts. Fig.16 As shown, the surface mounted heat pipe 3 is connected to the buried heat pipe in the satellite cabin board 24 of the flat-panel satellite 5, and the surface mounted heat pipe 3 is mounted on the lower surface of the heat dissipation surface 11 of the third radiant cooling plate 8 by rivets.

[0074] The method for using the heat radiator described in this embodiment includes the following three working conditions, specifically:

[0075] Working condition 1: When the flat-panel satellite 5 enters the high heat consumption working mode from the orbiting mode or the low heat consumption working mode, the fan-shaped heat radiator is unfolded, and the unfolding process is as follows: Fig.17 As shown, the driving motor 2 is energized in the forward direction, and the driving motor 2 drives the first radiant cooling plate 6 to rotate around the rotating shaft 21, and an angle difference occurs between the first radiant cooling plate 6 and the second radiant cooling plate 7. Since the heat dissipation surface 11 of the radiant cooling plate is higher on the outside and lower on the inside, during the rotation process, the inside of the first radiant cooling plate 6 and the outside of the second radiant cooling plate 7 gradually approach each other until they fit together. Fig.18 As shown, the rotation continues, and the adjacent radiant cooling plates undergo elastic deformation, squeezing the thermal pad 16 in the middle. After being squeezed and deformed, the thermal pad 16 fully contacts the radiant cooling plates on both sides, achieving the heat conduction effect between the radiant cooling plates. During the rotation of the first radiant cooling plate 6, the limiting protrusion 14 rotates synchronously in the adjacent limiting groove 13 embedded therein, until the limiting protrusion 14 fits the edge of the limiting groove 13, as shown in FIG. Fig.19 As shown, the first radiant cooling plate 6 and the second radiant cooling plate 7 are locked in position; the driving motor 2 is continuously powered, indirectly driving the second radiant cooling plate 7 to rotate around the rotating shaft 21, and the rotation process is consistent with the rotation process of the first radiant cooling plate 6, and the rotation and locking of all the second radiant cooling plates 7 are completed in sequence, as shown in FIG. Fig. 20 As shown, the folding fan type heat radiator is fully unfolded.

[0076] After being fully unfolded, adjacent radiant cooling plates are in full contact under the action of elastic deformation and thermal pad 16, realizing full-width thermal connection, and the internal heat of flat-panel satellite 5 is transferred to surface mounted heat pipe 3, surface mounted heat pipe 3 transfers the heat to third radiant cooling plate 8, and then to all radiant cooling plates, and all radiant cooling plates are used for heat dissipation.

[0077] Working condition 2: When the flat-panel satellite 5 enters the low heat consumption working mode from the high heat consumption working mode, the folding fan type heat radiator is folded, and the folding process is as follows: Fig.21 As shown, the driving motor 2 is powered on in the reverse direction, and the driving motor 2 drives the radiator unit 1 to rotate in the reverse direction around the rotating shaft 21, and the first radiant cooling plate 6 and the second radiant cooling plate 7 are gradually separated from the elastic deformation state of the fit and restored to the original state, until the limiting protrusion 14 fits with the other side edge of the limiting groove 13, and the relative position of the first radiant cooling plate 6 and the second radiant cooling plate 7 is locked, as shown in FIG. Fig. 22 The driving motor 2 is continuously powered in the reverse direction, indirectly driving the second cooling plate 7 to rotate in the reverse direction around the rotating shaft 21. The rotation process is consistent with the rotation process of the first cooling plate 6. The reverse rotation and locking of all the second cooling plates 7 are completed in sequence. Fig.23 As shown, the folding fan type heat radiator is completely folded.

[0078] After being fully folded, the heat dissipation surfaces of each radiant cooling plate are aligned vertically, so the area that can effectively dissipate heat is only the upper surface of the first radiant cooling plate 6 and the lower surface of the third radiant cooling plate 8; there is no direct contact between the radiant cooling plates, and they are only indirectly contacted through the upper fixing column 12 and the lower fixing column 15. Since the contact surface area between the upper fixing column 12 and the lower fixing column 15 is limited, the heat conduction efficiency is low. At this time, the folding fan type heat radiator is in low heat dissipation mode.

[0079] Working condition 3: When the flat-panel satellite 5 enters the non-full power working mode and the heat consumption is moderate, the folding fan type heat radiator is in a semi-expanded state according to the required heat dissipation area. The specific process is: the folding fan type heat radiator is fully expanded according to working condition 1, and then the folding fan type heat radiator is folded according to working condition 2. When the folding fan type heat radiator is folded to the middle state, the drive motor 2 is stopped from being powered. At this time, the folding fan type heat radiator is in a state where part of the radiant cooling plate is expanded and part of the radiant cooling plate is closed. Fig.24 shown.

[0080] When the folding fan type heat radiator is in a semi-expanded state, the internal heat of the flat-panel satellite 5 is transferred to the surface mounted heat pipe 3, the surface mounted heat pipe 3 transfers the heat to the third radiant cooling plate 8, and then transfers the heat to the radiant cooling plates that are heat-conductive to each other for heat dissipation, and the radiant cooling plates that are not in contact with each other at the top hardly participate in heat dissipation.

[0081] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A folding fan type heat radiator for a flat-panel satellite, characterized in that: It comprises a radiator unit (1), a drive motor (2), a surface mounted heat pipe (3) and a rotating shaft assembly (4), wherein the radiator unit (1) comprises a plurality of radiant cooling plates arranged in sequence along a vertical direction, wherein the radiant cooling plate (6) is located at the top end of the radiator unit (1), the third radiant cooling plate (8) is located at the bottom end of the radiator unit (1), and the rest are second radiant cooling plates (7), wherein the radiant cooling plates all have a mounting surface (9) and a heat dissipation surface (11), wherein the mounting surface (9) and the heat dissipation surface (11) are connected to each other. There is an angle between the two surfaces, the heat dissipation surface (11) of the third radiant cooling plate (8) is provided with a satellite end mounting surface (18) on the side, the heat dissipation surface (11) of the second radiant cooling plate (7) and the third radiant cooling plate (8) are provided with a thermal pad (16) on the upper surface, the mounting surface (9) of the second radiant cooling plate (7) and the third radiant cooling plate (8) are connected with an upper fixing column (12) on the upper surface, and the mounting surface (9) of the first radiant cooling plate (6) and the second radiant cooling plate (7) are connected with a lower fixing column (12) on the lower surface. The upper surface of the mounting surface (9) of the first radiant cooling plate (6) is connected to a top driving column (17), the upper surface of the upper fixing column (12) and the lower surface of the lower fixing column (15) are both provided with limiting grooves (13) and limiting protrusions (14), and the limiting protrusions (14) are embedded in adjacent limiting grooves (13), and the mounting surface (9), the upper fixing column (12), the lower fixing column (15) and the top driving column (17) are all provided with rotating shaft holes (10), The rotating shaft assembly (4) passes through all the rotating shaft holes (10) and presses the radiator unit (1); the top driving column (17) is connected to the output end of the driving motor (2); the driving motor (2) and the satellite end mounting surface (18) are connected to the satellite side (25) of the flat-panel satellite (5); a surface mounted heat pipe (3) is arranged on the lower surface of the heat dissipation surface (11) of the third radiant cooling plate (8); and the surface mounted heat pipe (3) is connected to a heat pipe embedded in a satellite cabin plate (24) of the flat-panel satellite (5).

2. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The drive motor (2) is a brake motor, the output end of the drive motor (2) is a rotating flange (19), the rotating flange (19) is connected to the top drive column (17), and the side of the drive motor (2) is provided with a fixed lug (20), and the fixed lug (20) is connected to the satellite side (25) of the flat-panel satellite (5).

3. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The rotating shaft assembly (4) comprises a rotating shaft (21), a silicone pad (22) and a nut (23); the rotating shaft (21) passes through all the rotating shaft holes (10); one end of the rotating shaft (21) is provided with a boss, and the other end is threadedly connected to the nut (23); a silicone pad (22) is provided between the boss and the radiator unit (1) and between the nut (23) and the radiator unit (1).

4. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The radiation cooling plate is an integrated structure, made of aluminum, and formed by sheet metal or stamping, and the heat dissipation surface (11) is sprayed with heat dissipation white paint.

5. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The upper fixing column (12), the lower fixing column (15) and the top driving column (17) are all made of aluminum alloy, and the surfaces are coated with molybdenum disulfide.

6. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The thermally conductive pad (16) is a gap-filling thermally conductive material.

7. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The mounting surface of the surface mounted heat pipe (3) is coated with thermal conductive silicone grease.

8. The folding fan type heat radiator for a flat-panel satellite according to claim 1, characterized in that: The width of the limiting groove (13) is greater than the limiting protrusion (14).

9. An assembly method of a folding fan type heat radiator for a flat-panel satellite as claimed in claim 1, characterized in that: A thermal pad (16) is pasted on the upper surface of the heat dissipation surface (11) of the second radiant cooling plate (7) and the third radiant cooling plate (8), and a plurality of radiant cooling plates, an upper fixing column (12), a lower fixing column (15) and a top driving column (17) are connected to obtain a radiator unit (1), and the radiator unit (1) is installed on a rotating shaft assembly (4), and the top driving column (17) is connected to the output end of a driving motor (2), and the driving motor (2) and a satellite end mounting surface (18) are connected to a satellite side edge (25) of a flat-panel satellite (5), and a surface mounted heat pipe (3) is connected to a heat pipe embedded in a satellite cabin board (24) of the flat-panel satellite (5), and the surface mounted heat pipe (3) is installed on the lower surface of the heat dissipation surface (11) of the third radiant cooling plate (8).

10. A method for using the folding fan type heat radiator for a flat-panel satellite as claimed in claim 1, characterized in that: The method of using the thermal radiator includes the following three working conditions: Working condition 1: When the flat-panel satellite (5) enters the high heat consumption working mode from the orbiting mode or the low heat consumption working mode, the driving motor (2) is energized in the forward direction, and the driving motor (2) drives the first radiant cooling plate (6) to rotate around the rotating shaft assembly (4). During the rotation process, the inner side of the first radiant cooling plate (6) and the outer side of the second radiant cooling plate (7) gradually approach each other until they are in contact with each other. The rotation continues, and the adjacent radiant cooling plates undergo elastic deformation, squeezing the thermal pad (16) in the middle. After the thermal pad (16) is squeezed and deformed, it fully contacts the radiant cooling plates on both sides. During the rotation process of the first radiant cooling plate (6), the limiting protrusion (14) rotates synchronously in the adjacent limiting groove (13) embedded therein until the limiting protrusion (14) and the limiting groove (13) are in contact with each other. 3) the edges are fitted, and the positions of the first radiant cooling plate (6) and the second radiant cooling plate (7) are locked; the driving motor (2) is continuously powered on, and the second radiant cooling plate (7) is indirectly driven to rotate around the rotating shaft assembly (4), and the rotation process is consistent with the rotation process of the first radiant cooling plate (6), and the rotation and locking of all the second radiant cooling plates (7) are completed in sequence, and the folding fan type heat radiator is fully unfolded; after being fully unfolded, the adjacent radiant cooling plates are fully contacted under the action of elastic deformation and the thermal pad (16), so as to realize the full-width thermal connection, and the internal heat of the flat-panel satellite (5) is transferred to the surface mounted heat pipe (3), and the surface mounted heat pipe (3) transfers the heat to the third radiant cooling plate (8), and then transfers the heat to all the radiant cooling plates, and all the radiant cooling plates are used for heat dissipation; Working condition 2: when the flat-panel satellite (5) enters the low heat consumption working mode from the high heat consumption working mode, the driving motor (2) is energized in the reverse direction, and the driving motor (2) drives the radiator unit (1) to rotate in the reverse direction around the rotating shaft assembly (4), and the first radiant cooling plate (6) and the second radiant cooling plate (7) are gradually separated from the elastic deformation state of the fit and restored to the original state until the limiting protrusion (14) fits with the other side edge of the limiting groove (13), and the relative position of the first radiant cooling plate (6) and the second radiant cooling plate (7) is locked, and the driving motor (2) is continuously energized in the reverse direction, indirectly driving the second radiant cooling plate (7) to rotate in the reverse direction around the rotating shaft assembly (4), and the rotation process is consistent with the rotation process of the first radiant cooling plate (6), and the reverse rotation and locking of all the second radiant cooling plates (7) are completed in sequence, and the folding fan type heat radiator is completely folded; after being completely folded, there is no direct contact between the radiant cooling plates, and the folding fan type heat radiator is in the low heat dissipation mode; Working condition 3: When the flat-panel satellite (5) enters a non-full-power working mode and the heat consumption is moderate, the folding fan type heat radiator is in a semi-expanded state according to the required heat dissipation area, the folding fan type heat radiator is fully expanded in accordance with working condition 1, and then the folding fan type heat radiator is folded in accordance with working condition 2. When the folding fan type heat radiator is folded to the intermediate state, the power supply to the drive motor (2) is stopped. At this time, the folding fan type heat radiator is in a state where part of the radiant cooling plate is expanded and part of the radiant cooling plate is closed.

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