High-reliability spaceflight cold plate joint

Abstract

The utility model belongs to the technical field of cold plate structure design, and particularly relates to a high-reliability spaceflight cold plate connector. Comprising an upper cover plate (1), a lower cover plate (3), a frame sealing strip (2), a connector (4), cooling fins (5), a supporting strip (6) and a base plate (7). The structure compactness, the bearing capacity and the sealing performance of the cold plate are improved, the durability and the reliability of products are improved, and the cold plate can be used for occasions requiring high insurance coefficients such as target aircrafts such as spacecrafts and satellites, is already applied to space station multi-product structure design at present and has good application prospects. The utility model discloses a joint integrated tenon-and-mortise welding structure cold plate which meets the requirement for stable and normal operation of spacecraft electronic equipment.

Description

Technical Field

[0001] This utility model belongs to the field of cold plate structure design technology, and specifically relates to a high-reliability aerospace cold plate joint. Background Technology

[0002] With the development of integrated, compact, and high-power electronic technology, electronic devices are exhibiting a trend towards high performance and compactness. As the core of these devices, chips are operating at increasingly higher frequencies, consuming more power, and generating more heat. The reliability of electronic components is highly sensitive to temperature; within the 70℃~80℃ range, for every 1℃ increase in temperature, component reliability decreases by 5%. Therefore, it is necessary to utilize external media to remove heat flowing to or generated within the electronic devices themselves to prevent heat accumulation and high temperatures. The development of cooling and heat dissipation technology is a crucial link in the trend towards high reliability, high performance, and low cost in electronic devices.

[0003] A liquid-cooled plate is a type of heat exchanger. Its surface is arranged with heat sources that require cooling. When the liquid-cooled plate is in operation, fluid enters the inner cavity of the plate through the inlet connector, flows forward through internal channels, carrying away heat, and exits through the outlet connector. During its flow within the plate, the fluid avoids absorbing heat from the equipment on the plate through the plate walls and internal heat dissipation fins. The fluid heats up and carries away the heat, thus achieving the purpose of cooling the equipment.

[0004] Due to the high compactness requirements of electronic devices, many new demands have been placed on the structural design of the cold plate. In this project, the cold plate has a unique interface installation location, requiring the inlet and outlet liquid cooling joints to be located on the cold plate's sealing side. The existing aerospace cold plate argon arc welding joint structure is prone to affecting the brazing weld seam due to the welding heat-affected zone. Therefore, a new integrated brazing structure is needed to address the shortcomings of the existing argon arc welding joint structure. Thus, a cold plate with an integrated tenon-and-mortise welded joint structure was developed. Utility Model Content

[0005] The purpose of this utility model is to master the key technologies and manufacturing methods of the integrated tenon and mortise welded structure of the cold plate side-exit joint, and to provide a cold plate with a high reliability, high compactness, and long service life that integrates tenon and mortise welded structure to meet the requirements of stable and normal operation of spacecraft electronic equipment.

[0006] A high-reliability aerospace cold plate joint integrated tenon-and-mortise welded structure includes an upper cover plate, a lower cover plate, a frame seal, a joint, heat dissipation fins, support strips, and a pad. A frame seal is provided at the circumferential edge of the lower cover plate, and heat dissipation fins cover the entire inner frame of the frame seal. Support strips are evenly distributed on the lower cover plate, and the heat dissipation fins, support strips, and frame seal are at the same height. The joint is provided on the side wall of the frame seal, and the joint is connected to the frame seal using a tenon-and-mortise structure. A pad is provided on the lower cover plate near the joint. The upper cover plate covers the frame seal and forms an integral structure with the frame seal and the lower cover plate. During brazing, the solder flows into the tenon-and-mortise joint through a siphon effect, ensuring the sealing requirements of the joint.

[0007] Furthermore, the connector is provided in two parts, namely an inlet connector and an outlet connector, both of which are connected to the side wall of the frame seal strip by means of a mortise and tenon structure.

[0008] Furthermore, the heat dissipation channel of the heat dissipation fins has a U-shaped structure on the inner frame of the frame seal. The cooling working fluid enters the heat dissipation channel through the inlet connector and is discharged from the outlet connector.

[0009] Furthermore, the upper cover plate, lower cover plate, frame seal, joint, heat dissipation fins, pad, and support strip are welded into a whole by vacuum brazing.

[0010] Furthermore, the vacuum brazing uses 4004 solder foil.

[0011] Furthermore, the upper cover plate, lower cover plate, frame seal, connector, heat dissipation fins, pad, and support strip are made of aluminum alloy, titanium alloy, or stainless steel.

[0012] The beneficial effects of this utility model are:

[0013] Research on the integrated tenon and mortise welding structure of cold plate joints increases the compactness, load-bearing capacity and sealing performance of cold plate structures, and improves the durability and reliability of products. It can be used in applications requiring high safety factors, such as spacecraft, satellites and other target vehicles. It has been applied in the multi-product structure design of space stations and has good application prospects. Attached Figure Description

[0014] Figure 1 This is a view of the cold-rolled steel plate after vacuum brazing.

[0015] Figure 2 This is a diagram of the internal structure of the cold plate (excluding the top cover).

[0016] Figure 3 Schematic diagram of the tenon and mortise structure of the joint (4);

[0017] Figure 4 Design drawings for connector (4);

[0018] Figure 5 Design drawings for the mortise and tenon connection between the frame seal (2) and the joint (4). Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] The utility model's utility model point is: to provide a highly reliable aerospace cold plate joint integrated tenon and mortise welding structure;

[0022] The core utility model point: a high-reliability aerospace cold plate joint integrated tenon and mortise welding structure.

[0023] Secondary utility model point 1: The cold plate structure includes an upper cover plate (1), a lower cover plate (3), a frame seal (2), a joint (4), heat dissipation fins (5), a support strip (6), and a pad plate (7).

[0024] The round holes in the ear plates are drilled after the upper cover plate (1), lower cover plate (3), and frame seal (2) are processed to ensure the consistency of the hole positions. The joint (4) and the frame seal (2) are connected by a tenon and mortise structure. During the brazing process, the solder flows into the tenon and mortise joint through the siphon effect to ensure the sealing requirements of the joint (4).

[0025] Secondary utility model point 2: Conventional cold plate joints are mostly set at the upper and lower cover plates, and are formed by brazing and then argon arc welding. Due to the high process difficulty, the side-exit joints pose a risk of cold plate leakage caused by damage to the brazed weld seam in the heat-affected zone of the argon arc welding joint. The tenon and mortise fit between the joint (4) and the frame seal (2) of this product ensures the strength and sealing of the joint (4) connection, and also avoids the situation where the cold plate leakage is caused by secondary damage to the brazed weld seam in the argon arc welding joint structure.

[0026] Secondary utility model point 3: The upper cover plate (1), lower cover plate (3), frame seal (2), joint (4), heat dissipation fins (5), pad (7), and support strip (6) are welded into a whole by vacuum brazing.

[0027] Secondary utility model point 4: A gasket is provided at the joint inlet, which not only ensures that the joint end does not collapse due to high temperature during welding, but also serves to divert liquid after it enters the cold plate.

[0028] Secondary utility model point 5: After the product is brazed as a whole, the upper and lower cover plates and joints are precision machined to ensure that the flatness of the upper and lower cover plates is controlled within 0.03mm and to ensure the accuracy of the mounting surface;

[0029] Secondary utility model point 6: The materials of each part of the cold plate can be aluminum alloy, titanium alloy or stainless steel, etc.

[0030] Secondary utility model point 7: The thickness uniformity of the upper and lower cover plates (3) can be guaranteed within 0.05mm.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The diagram shows the integrated tenon and mortise welding structure of the high-reliability aerospace cold plate joint in this embodiment. The cold plate includes an upper cover plate (1), a lower cover plate (3), a frame seal (2), a joint (4), heat dissipation fins (5), a pad (7), and a support strip (6). The thickness uniformity requirement of the upper and lower cover plates (1, 3) is 0.05mm. The connection between the joint (4) and the frame seal (2) is designed as a tenon and mortise connection structure. The round holes in the lugs are drilled and formed after the upper cover plate (1), lower cover plate (3), and frame seal (2) are processed to ensure the consistency of the hole positions. When assembling the upper and lower cover plates (1, 3), frame seal (2), fins (5), and support strip (6), the round holes are fastened with M4 screws. When brazing into the furnace, M12 screws are fastened on the outer ring of the fixture, and a special clamping fixture is used at the joint (4). The clamping uses a diagonal fastening method to ensure uniform stress on the cold plate during brazing, preventing leakage after welding. Vacuum brazing uses 4004 solder foil, which has good fluidity. During welding, the solder melts through siphon action and fills the gap between the tenon and tenon joint of the joint (4) and the frame seal (2), ensuring the strength and sealing of the joint. This also avoids the secondary damage to the brazing joint caused by conventional cold plate argon arc welding, which can lead to leakage. A pad (7) is set at the joint inlet to prevent the joint end from collapsing due to high temperature during welding and to divert the liquid after it enters the cold plate. After the product is brazed as a whole, the upper and lower cover plates and the joint are precision machined to ensure that the flatness of the upper and lower cover plates is controlled within 0.03mm, ensuring the accuracy of the installation surface.

[0032] A high-reliability aerospace cold plate joint integrated tenon and mortise welded structure includes an upper cover plate (1), a lower cover plate (3), a frame seal (2), a joint (4), heat dissipation fins (5), support bars (6), and a pad (7); the lower cover plate (3) has a frame seal (2) at its circumferential edge, the heat dissipation fins (5) cover the entire inner frame of the frame seal (2), and the support bars (6) are evenly distributed on the lower cover plate (3). The heat dissipation fins (5), support bars (6), and frame seal (2) are of the same type. A height; the frame seal (2) has a joint (4) on its side wall, and the joint (4) is connected to the frame seal (2) by a tenon and mortise structure. A pad (7) is provided on the lower cover plate (3) near the joint (4); the upper cover plate (1) covers the frame seal (2) and is integral with the frame seal (2) and the lower cover plate (3); during the brazing process, the solder flows into the tenon and mortise joint through siphon action to ensure the sealing requirements of the joint (4).

[0033] In one embodiment of this utility model, there are two connectors (4), namely an inlet connector and an outlet connector, both of which are connected to the side wall of the frame seal (2) by means of a tenon and mortise structure.

[0034] In one embodiment of this utility model, the heat dissipation channel of the heat dissipation fin (5) has a U-shaped structure on the inner frame of the frame seal (2). The cooling working fluid enters the heat dissipation channel through the inlet connector and is discharged from the outlet connector.

[0035] In one embodiment of this utility model, the upper cover plate (1), lower cover plate (3), frame seal (2), joint (4), heat dissipation fins (5), pad plate (7), and support strip (6) are welded into a whole by vacuum brazing.

[0036] In one embodiment of this utility model, the vacuum brazing uses 4004 solder foil.

[0037] In one embodiment of this utility model, the upper cover plate (1), lower cover plate (3), frame seal (2), joint (4), heat dissipation fins (5), pad plate (7), and support strip (6) are made of aluminum alloy, titanium alloy, or stainless steel.

[0038] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this invention. It should be understood that the above descriptions are merely specific embodiments of this invention and are not intended to limit this invention. Within the spirit and principles of this invention, any person skilled in the art may modify or alter the disclosed technical content to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, alterations, modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention without departing from the content of the technical solution of this invention should be included within the protection scope of this invention.

Claims

1. A high-reliability aerospace cold plate joint, characterized in that, The system includes an upper cover plate, a lower cover plate, a frame seal, a connector, heat dissipation fins, support strips, and a pad. A frame seal is provided along the circumferential edge of the lower cover plate. Heat dissipation fins cover the entire inner frame of the frame seal. Support strips are evenly distributed on the lower cover plate. The heat dissipation fins, support strips, and frame seal are at the same height. The connector is located on the side wall of the frame seal and is connected to the frame seal using a mortise and tenon joint. A pad is located on the lower cover plate near the connector. The upper cover plate covers the frame seal and forms an integral structure with the frame seal and the lower cover plate. During brazing, the solder flows into the mortise and tenon joint through a siphon effect, ensuring the sealing requirements at the joint.

2. The connector as described in claim 1, characterized in that, The connector has two parts, namely an inlet connector and an outlet connector, both of which are connected to the side wall of the frame seal strip by means of mortise and tenon joints.

3. The connector as described in claim 2, characterized in that, The heat dissipation channel of the heat dissipation fins has a U-shaped structure on the inner frame of the frame seal. The cooling working fluid enters the heat dissipation channel through the inlet connector and is discharged from the outlet connector.

4. The connector as described in claim 3, characterized in that, The upper cover plate, lower cover plate, frame seal, joint, heat dissipation fins, pad, and support strip are welded into a whole by vacuum brazing.

5. The connector as described in claim 4, characterized in that, The vacuum brazing uses 4004 solder foil.

6. The connector as described in claim 5, characterized in that, The upper cover plate, lower cover plate, frame seal, connector, heat dissipation fins, pad, and support strip are made of aluminum alloy, titanium alloy, or stainless steel.

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