Space long-distance heat pipe arrangement assembly and arrangement method

Abstract

The invention belongs to the technical field of satellite and camera thermal control, and discloses a space long-distance heat pipe arrangement assembly and an arrangement method.The space long-distance heat pipe arrangement assembly comprises heat pipes and a lap joint tool, the heat pipes comprise a plurality of heating end heat pipes and a plurality of heat dissipation end heat pipes, one end of each heating end heat pipe is a fin installation face, and the other end of each heat dissipation end heat pipe is a fin installation face; the heating end heat pipe and the heat dissipation end heat pipe are each provided with a plurality of bends. The heating end heat pipe and the heat dissipation end heat pipe are connected through a lap joint tool, the lap joint tool comprises a plurality of layers of clamping plates, a plurality of strip-shaped grooves are formed in each layer of clamping plate, a plurality of heat pipe channels are defined by the strip-shaped grooves of every two adjacent layers of clamping plates, and the free end of the heating end heat pipe and the free end of the heat dissipation end heat pipe are fixed in the heat pipe channels; the lap joint tool and the space geometry method are used for solving the problems that an existing heat pipe arrangement scheme cannot meet the long-distance heat transmission requirement, the lap joint temperature difference of the heat pipes is large, and the special requirement for the space installation positions of the heating end and the heat dissipation end exists.

Description

Technical Field

[0001] The present invention relates to the field of satellite and camera thermal control technology, and in particular to a space long-distance heat pipe arrangement component and an arrangement method. Background Art

[0002] During the thermal control design of satellite cameras, the heat pipe links need to be arranged in space and direction. Multiple restrictive principles need to be considered during the arrangement of heat pipes. For example, bending processing can only be performed based on a certain radial reference plane, and axial twisting is not allowed. Based on the reliability design requirements of spacecraft, the bending radius of the heat pipe is usually not less than 5 to 7 times the diameter of the heat pipe. Conventional satellite camera thermal control designs often use a single heat pipe or multiple heat pipes in parallel to connect the heating end and the heat dissipation end to achieve heat transfer; for long-distance heat transmission, the heat is often transferred to the heat expansion plate through the front heat pipe, and the rear heat pipe is installed on the other side of the heat expansion plate to connect to the heat dissipation surface, or the heat transfer is directly achieved by overlapping two heat pipe fins.

[0003] However, the arrangement of a single heat pipe or parallel heat pipes is limited by the heat transfer efficiency and processing length of the heat pipe and cannot meet the needs of long-distance heat transmission. When the heat pipe is overlapped with a heat expansion plate, a large overlap temperature difference will be generated. The direct overlap of two heat pipe fins has special requirements for the spatial installation position of the heating end and the heat dissipation end, and has high requirements for the bending method of the heat pipe. Summary of the invention

[0004] The present invention aims to provide a spatial long-distance heat pipe arrangement component and arrangement method, using overlapping tooling and spatial geometry methods to solve the problems that existing heat pipe arrangement schemes cannot meet the requirements of long-distance heat transfer, the temperature difference of heat pipe overlap is large, and there are special requirements for the spatial installation positions of the heating end and the heat dissipation end.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A spatial long-distance heat pipe arrangement component comprises a heat pipe and an overlapping tooling, the heat pipe comprising a plurality of heat pipes at the heating end and a plurality of heat pipes at the heat dissipation end, one end of the heat pipe at the heating end is a fin mounting surface, which matches the mounting surface of the heating end, and one end of the heat pipe at the heat dissipation end is a fin mounting surface, which matches the mounting surface of the heat dissipation end; the heat pipe at the heating end and the heat pipe at the heat dissipation end are both provided with a plurality of bends to achieve structural avoidance; the heat pipe at the heating end and the heat pipe at the heat dissipation end are connected with the heat pipe at the heat dissipation end through the overlapping tooling, the overlapping tooling comprises a plurality of layers of plywood connected in sequence, each layer of the plywood is provided with a plurality of strip grooves, the strip grooves of the two adjacent layers of the plywood correspond one to one and surround a plurality of heat pipe channels, and the size of the heat pipe channel is adapted to the size of the heat pipe, the free end of the heat pipe at the heating end and the free end of the heat pipe at the heat dissipation end are fixed in the heat pipe channel.

[0007] Furthermore, the shape of the heat pipe channel is cylindrical; the heat pipe channels of two adjacent layers are arranged in a staggered manner.

[0008] Furthermore, the material of the clamping plate is aluminum alloy or magnesium alloy; an indium sheet is arranged in the strip-shaped groove or is coated with thermal conductive silicone grease.

[0009] Furthermore, the edges of the clamping plates are all provided with lugs, and the lugs are provided with threaded holes or pin holes.

[0010] Furthermore, the heat pipe is a normal temperature channel heat pipe or a low temperature channel heat pipe.

[0011] A method for arranging long-distance heat pipes in space, using the long-distance heat pipe arrangement assembly described above, comprises the following steps:

[0012] S1, determining a starting reference plane of the heat pipe at the heating end based on the heating end, and determining a starting reference plane of the heat pipe at the heat dissipation end based on the heat dissipation end;

[0013] S2. Based on the spatial position relationship between the heating end and the heat dissipation end, the heating end and the heat dissipation end are respectively used as the starting positions. Under the premise of avoiding structural interference, the reference plane where each straight section of the heat pipe after bending is located is determined in advance. The intersection of the reference plane where each straight section of the heat pipe before bending is located and the reference plane where the straight section of the heat pipe after bending is located is used as the bending reference line. It is ensured that the bending point is on the bending reference line. The heat pipe bending angle, path length, and structural interference avoidance are comprehensively considered, and the heat pipe pipeline is iteratively optimized to determine the heat pipe arrangement path;

[0014] S3, overlap one end of the heat pipe at the heating end away from the installation surface of the heating end and one end of the heat pipe at the heat dissipation end away from the installation surface of the heat dissipation end in the heat pipe channel respectively, and fix them with several layers of plywood.

[0015] Further, in S3, when the number of the splints is more than three layers, and the number of the heat pipes at the heating end and the heat pipes at the heat dissipation end are both more than two, the heat pipes at the heating end and the heat pipes at the heat dissipation end are located in the heat pipe channels of different layers, and the heat pipes at the heating end and the heat pipes at the heat dissipation end are arranged alternately.

[0016] Further, in S3, when the number of the clamping plates is two, and the number of the heat pipe at the heating end and the heat pipe at the heat dissipation end are both one, the heat pipe at the heating end and the heat pipe at the heat dissipation end are located in the heat pipe channel of the same layer.

[0017] The technical principle and beneficial effects of the technical solution are:

[0018] 1. Based on the spatial position relationship between the heating end and the heat dissipation end, the present invention designs the basic bending path of the heat pipe from both ends as the starting position under the premise of avoiding structural interference, determines the reference plane of each straight section of the heat pipe after bending, and generates a bending reference line by intersecting the two reference planes where the straight sections of the heat pipe before and after bending are located. Under the premise of ensuring that each bending point of the heat pipe is on the reference line, the heat pipe bending angle, path length, structural interference avoidance and other factors are comprehensively considered to iteratively optimize the heat pipe pipeline and determine the optimal heat pipe arrangement path, which can achieve a short design path of the heat pipe and less bending of the heat pipe, and can adapt to different spatial installation positions of the heating end and the heat dissipation end, so as to ensure the optimization of the heat transfer efficiency of the heat pipe link, and through the spatial geometry method, the heat pipe bending reference line is generated based on the intersection of the preset reference planes, and the heat pipe path is iteratively optimized under the constraint of the reference line, which can ensure that the heat pipe pipeline is not twisted, and the heat pipe bending and length can be iteratively optimized by adjusting the sketch size parameters;

[0019] 2. The present invention meets the requirements of long-distance heat transmission by designing overlapping tooling, and the temperature difference of the heat pipe overlap is small, which can be adapted to different spatial installation positions of the heating end and the heat dissipation end, ensuring the optimization of the heat transfer efficiency of the heat pipe link; the shape of the heat pipe channel is cylindrical, and the outer diameter of the heat pipe overlap is designed according to the cross-sectional circle size of the heat pipe channel, which can ensure that the heat pipe is not restricted by angles during the spatial arrangement process, the heat pipe overlap heat transfer temperature difference is small, and the disassembly and assembly operation is convenient; wherein, according to the path length, the heat pipe at the heating end or the heat pipe at the heat dissipation end can also be formed by overlapping several sections of heat pipes;

[0020] 3. The lap joint tooling of the present invention can realize one-to-one lap joint or multiple-to-multi lap joint. The one-to-one lap joint of heat pipes can not change the heat pipe reference plane, but only add parallel heat pipe lines in the plane, that is, the two heat pipe channels composed of two layers of plywood are on the same plane; when the heat pipes are multiple-to-multi lap joints, a new parallel reference plane can be built on the basis of the original one-end reference plane, and the two layers of heat pipe channels are arranged in a staggered manner. The heat pipe at the heating end is overlapped in the heat pipe channel of the first layer, and the heat pipe at the heat dissipation end is overlapped in the heat pipe channel of the second layer, so that the heat pipe at the heating end and the heat pipe at the heat dissipation end are overlapped in two layers to ensure the overlap heat transfer efficiency;

[0021] 4. By controlling the processing tolerance and eccentric design of the strip groove, effective clamping and overlapping heat transfer of the heat pipe can be achieved. The clamping plate is made of thermal conductive materials such as aluminum alloy or magnesium alloy. The thickness can be designed to be as thin as possible within the allowable range of material stiffness to reduce the overlapping heat transfer temperature difference; indium sheets are padded in the strip groove or thermal conductive silicone grease is applied to enhance the heat conduction efficiency of the heat pipe overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the spatial arrangement of multiple heat pipes and the overlapping of overlapping tooling in Example 1 of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged schematic diagram of

[0024] Figure 3 This is an exploded schematic diagram of the overlapping tooling in implementation 1 of the present invention;

[0025] Figure 4 This is a temperature reduction working curve diagram of the spatial long-distance heat pipe arrangement assembly in Example 1 of the present invention during the test;

[0026] Figure 5 This is a schematic diagram of the spatial arrangement of a single heat pipe and the overlapping of the overlapping tooling in Example 2 of the present invention;

[0027] Figure 6 for Figure 4 A partial enlarged schematic diagram of

[0028] Figure 7 This is an exploded schematic diagram of the overlapping tooling in implementation 2 of the present invention;

[0029] The names of the corresponding marks in the accompanying drawings are:

[0030] Heat pipe 1 at the heating end, overlapping tooling 2, upper cover plate 21, middle clamping plate 22, lower cover plate 23, upper pressing plate 24, lower pressing plate 25, heat pipe 3 at the heat dissipation end, strip groove 4, lug 5, threaded hole 51, fin 6. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0032] Example 1

[0033] like Figure 1-3As shown, a spatial long-distance heat pipe arrangement component includes a heat pipe and a lap joint tool 2, the heat pipe is a normal temperature channel heat pipe, the heat pipe includes three heat pipes 1 at the heating end arranged in parallel and four heat pipes 3 at the heat dissipation end arranged in parallel, one end of the heat pipe 1 at the heating end is a fin mounting surface 6, which matches the heat pipe mounting surface, and one end of the heat pipe 3 at the heat dissipation end is a fin mounting surface 6, which matches the heat dissipation end mounting surface; the heat pipe 1 at the heating end is provided with two spatial bends, and the heat pipe 3 at the heat dissipation end is provided with three spatial bends. Bend to achieve structural avoidance (the avoidance structure is not shown in the figure); the heat pipe 1 at the heating end is connected to the heat pipe 3 at the heat dissipation end by a lap joint tool 2, and butt heat transfer is performed. The lap joint tool 2 includes three layers of plywood made of aluminum alloy connected in sequence. The three layers of plywood are, from top to bottom, an upper cover plate 21, an intermediate plywood 22 and a lower cover plate 23. The upper cover plate 21 is provided with three strip grooves 4, and the side of the intermediate plywood 22 close to the upper cover plate 21 is provided with three strip grooves 4. The upper cover plate The strip grooves 4 of the middle clamp plate 21 and the middle clamp plate 22 correspond to each other to form three heat pipe channels, the size of the heat pipe channels is adapted to the size of the heat pipes, the three heat-dissipating end heat pipes 1 correspond to each other and are fixed in the heat pipe channels; the middle clamp plate 22 is provided with four strip grooves 4 on the side away from the upper cover plate 21, and the lower cover plate 23 is provided with four strip grooves 4, the strip grooves 4 of the middle clamp plate 22 and the lower cover plate 23 correspond to each other to form four heat pipe channels, the size of the heat pipe channels is adapted to the size of the heat pipes, the four heat-dissipating end heat pipes 3 correspond to each other and are fixed in the heat pipe channels; and thermal conductive silicone grease is applied in the strip grooves 4; in this embodiment, the shape of the heat pipe channels is cylindrical; and the first layer of heat pipe channels and the second layer of heat pipe channels are staggered; wherein, the edges of the three-layer clamp plates are provided with lugs 5, and the lugs 5 are provided with threaded holes 51, which are used to realize the compression and fixation of the three-layer clamp plates of the overlapping tooling 2 and the heat pipes.

[0034] A method for arranging a long-distance heat pipe in space, using the above-mentioned long-distance heat pipe arrangement component, comprises the following steps:

[0035] S1, determining the starting reference plane of the heat pipe 1 at the heating end based on the heating end, and determining the starting reference plane of the heat pipe 3 at the heat dissipation end based on the heat dissipation end;

[0036] S2. Based on the spatial position relationship between the heating end and the heat dissipation end, the heating end and the heat dissipation end are respectively used as the starting positions. Under the premise of avoiding structural interference, the reference plane where each straight section of the heat pipe after bending is located is determined in advance. The intersection of the reference plane where each straight section of the heat pipe before bending is located and the reference plane where the straight section of the heat pipe after bending is located is used as the bending reference line. It is ensured that the bending point is on the bending reference line. The heat pipe bending angle, path length, and structural interference avoidance are comprehensively considered, and the heat pipe pipeline is iteratively optimized to determine the heat pipe arrangement path;

[0037] S3. Overlap one end of the heat pipe 1 at the heating end away from the installation surface of the heating end in the heat pipe channel surrounded by the upper cover plate 21 and the middle clamp plate 22, and overlap one end of the heat pipe 3 at the heat dissipation end away from the installation surface of the heat dissipation end in the heat pipe channel surrounded by the middle clamp plate 22 and the lower cover plate 23, and the heat pipe 1 at the heating end and the heat pipe 3 at the heat dissipation end are arranged alternately, and the three-layer clamp plate is fixed with bolts.

[0038] like Figure 4 , is the cooling working curve of the spatial long-distance heat pipe arrangement component of this embodiment in the test. The cold end in the figure is the heat dissipation end, and the hot end is the heating end. The heat pipe overlap link is three 2.8m heating end heat pipes 1 and four 3.3m heat dissipation end heat pipes 3 overlap for heat transfer. The heating end heat pipe follows the heat dissipation end mounting surface to cool to -60°C. After balance, the temperature difference of the link heat pipe is always stable within 5°C. The cold end in the figure is the heat dissipation end, and the hot end is the heating end. It proves that the heat pipe arrangement scheme of this embodiment can meet the requirements of long-distance heat transmission, the heat pipe overlap temperature difference is small and the heat transfer efficiency is high.

[0039] Example 2

[0040] like Figure 5-7 As shown, a spatial long-distance heat pipe arrangement component includes a heat pipe and a lap joint tool 2, the heat pipe is a normal temperature channel heat pipe, the heat pipe includes a heat pipe 1 at the heating end and a heat pipe 3 at the heat dissipation end, one end of the heat pipe 1 at the heating end is a fin mounting surface 6, which matches the mounting surface of the heating end, and one end of the heat pipe 3 at the heat dissipation end is a fin mounting surface 6, which matches the mounting surface of the heat dissipation end; the heat pipe 1 at the heating end is provided with two spatial bends, and the heat pipe 3 at the heat dissipation end is provided with three spatial bends to achieve structural avoidance (the avoidance structure is not shown in the figure); the heat pipe 1 at the heating end is connected to the heat pipe 3 at the heat dissipation end by a lap joint tool 2, and butt heat transfer is performed, the lap joint tool 2 includes two layers of plywood made of aluminum alloy connected in sequence, and the two layers are connected to each other. The layer of plywood from top to bottom is an upper pressing plate 24 and a lower pressing plate 25, the upper pressing plate 24 is provided with two strip grooves 4, the lower pressing plate 25 is provided with two strip grooves 4, the strip grooves 4 of the upper pressing plate 24 and the lower pressing plate correspond to each other to form two heat pipe channels, the size of the heat pipe channel is adapted to the size of the heat pipe, the heat pipe 1 at the heating end is fixed in one heat pipe channel, and the heat pipe 3 at the heat dissipation end is fixed in another heat pipe channel; and the strip grooves 4 are coated with thermal conductive silicone grease; in this embodiment, the shape of the heat pipe channel is cylindrical; wherein, lugs 5 are provided at the edges of the two layers of plywood, and threaded holes 51 are provided on the lugs 5, which are used to realize the compression and fixation of the two layers of plywood of the overlapping tooling 2 and the heat pipe.

[0041] A method for arranging a long-distance heat pipe in space, using the above-mentioned long-distance heat pipe arrangement component, comprises the following steps:

[0042] S1, determining the starting reference plane of the heat pipe 1 at the heating end based on the heating end, and determining the starting reference plane of the heat pipe 3 at the heat dissipation end based on the heat dissipation end;

[0043] S2. Based on the spatial position relationship between the heating end and the heat dissipation end, the heating end and the heat dissipation end are respectively used as the starting positions. Under the premise of avoiding structural interference, the reference plane where each straight section of the heat pipe after bending is located is determined in advance. The intersection of the reference plane where each straight section of the heat pipe before bending is located and the reference plane where the straight section of the heat pipe after bending is located is used as the bending reference line. It is ensured that the bending point is on the bending reference line. The heat pipe bending angle, path length, and structural interference avoidance are comprehensively considered, and the heat pipe pipeline is iteratively optimized to determine the heat pipe arrangement path;

[0044] S3. Overlap one end of the heat pipe 1 at the heating end away from the installation surface of the heating end in a heat pipe channel surrounded by the upper pressing plate 24 and the lower pressing plate 25, overlap one end of the heat pipe 3 at the heat dissipation end away from the installation surface of the heat dissipation end in another heat pipe channel, and fix the two layers of plywood with bolts.

[0045] In summary, based on the spatial position relationship between the heating end and the heat dissipation end, the present invention designs the basic bending path of the heat pipe from the two ends as the starting position under the premise of avoiding structural interference, determines the reference plane of each straight section of the heat pipe after bending, and generates a bending reference line by intersecting the two reference planes where the straight sections of the heat pipe before and after bending are located. Under the premise of ensuring that each bending point of the heat pipe is on the reference line, the heat pipe bending angle, path length, structural interference avoidance and other factors are comprehensively considered to iteratively optimize the heat pipe pipeline and determine the optimal heat pipe arrangement path, which can achieve a short design path of the heat pipe and less heat pipe bending, and can adapt to different spatial installation positions of the heating end and the heat dissipation end, so as to ensure the optimization of the heat transfer efficiency of the heat pipe link, and through the spatial geometry method, a heat pipe bending reference line is generated based on the intersection of preset reference planes, and the heat pipe path is iteratively optimized under the constraint of the reference line, which can ensure that the heat pipe pipeline is not twisted, and the heat pipe bending and length can be iteratively optimized by adjusting the sketch size parameters.

[0046] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A spatial long-distance heat pipe arrangement assembly, characterized in that: The invention comprises a heat pipe and a lap joint tool (2), wherein the heat pipe comprises a plurality of heat pipes at the heating end (1) and a plurality of heat pipes at the heat dissipation end (3), wherein one end of the heat pipe at the heating end (1) is a fin mounting surface (6) which matches the heat pipe mounting surface, and one end of the heat pipe at the heat dissipation end (3) is a fin mounting surface (6) which matches the heat pipe mounting surface; the heat pipe at the heating end (1) and the heat pipe at the heat dissipation end (3) are both provided with a plurality of bends to achieve structural avoidance; the heat pipe at the heating end (1) and the heat pipe at the heat dissipation end (3) are connected to each other by a fin mounting surface (6) which matches the heat pipe mounting surface; The heat pipe (3) at the heat dissipation end is connected via the overlapping fixture (2), and the overlapping fixture (2) comprises a plurality of layers of plywood connected in sequence, each layer of the plywood being provided with a plurality of strip grooves (4), the strip grooves (4) of two adjacent layers of the plywood corresponding to each other and surrounding a plurality of heat pipe channels, and the size of the heat pipe channel is adapted to the size of the heat pipe, and the free end of the heat pipe (1) at the heat dissipation end and the free end of the heat pipe (3) at the heat dissipation end are fixed in the heat pipe channel.

2. A spatial long distance heat pipe arrangement assembly according to claim 1, characterized in that: The heat pipe channels are cylindrical in shape; the heat pipe channels in two adjacent layers are arranged in a staggered manner.

3. A spatial long distance heat pipe arrangement assembly according to claim 1, characterized in that: The material of the clamping plate is aluminum alloy or magnesium alloy; an indium sheet is arranged in the strip-shaped groove (4) or is coated with thermal conductive silicone grease.

4. The spatial long-distance heat pipe arrangement assembly according to claim 1, characterized in that: The edges of the clamping plates are all provided with lugs (5), and the lugs (5) are provided with threaded holes (51) or pin holes.

5. The spatial long-distance heat pipe arrangement assembly according to claim 1, characterized in that: The heat pipe is a normal temperature channel heat pipe or a low temperature channel heat pipe.

6. A method for arranging long-distance heat pipes in space, using a long-distance heat pipe arrangement assembly as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1, determining a starting reference plane of a heat pipe (1) at the heating end based on the heating end, and determining a starting reference plane of a heat pipe (3) at the heat dissipation end based on the heat dissipation end; S2. Based on the spatial position relationship between the heating end and the heat dissipation end, the heating end and the heat dissipation end are respectively used as the starting positions. Under the premise of avoiding structural interference, the reference plane where each straight section of the heat pipe after bending is located is determined in advance. The intersection of the reference plane where each straight section of the heat pipe before bending is located and the reference plane where the straight section of the heat pipe after bending is located is used as the bending reference line. It is ensured that the bending point is on the bending reference line. The heat pipe bending angle, path length, and structural interference avoidance are comprehensively considered, and the heat pipe pipeline is iteratively optimized to determine the heat pipe arrangement path; S3, overlap one end of the heat pipe (1) at the heating end away from the heating end mounting surface and one end of the heat pipe (3) at the heat dissipation end away from the heat dissipation end mounting surface in the heat pipe channel respectively, and fix them with several layers of clamping plates.

7. A method for arranging long-distance heat pipes in space according to claim 6, characterized in that: In S3, when the number of the clamping plates is more than three layers, and the number of the heat pipes (1) at the heating end and the heat pipes (3) at the heat dissipation end are both more than two, the heat pipes (1) at the heating end and the heat pipes (3) at the heat dissipation end are located in the heat pipe channels of different layers, and the heat pipes (1) at the heating end and the heat pipes (3) at the heat dissipation end are arranged in a staggered manner.

8. The method for arranging long-distance heat pipes in space according to claim 6, characterized in that: In S3, when the number of the clamping plates is two, and the number of the heat pipe (1) at the heating end and the heat pipe (3) at the heat dissipation end are both one, the heat pipe (1) at the heating end and the heat pipe (3) at the heat dissipation end are located in the heat pipe channel of the same layer.

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