Ducted heat exchanger core structure and its molding method

Abstract

This invention relates to a ducted heat exchanger core structure, which includes a flat tube, an upper side seal, a lower side seal, a middle seal, fins, an upper arc-shaped side plate, and a lower arc-shaped side plate. Multiple parallel flow channels are formed within the flat tube. The upper and lower arc-shaped side plates are arranged in parallel, forming an arc-shaped space between them. The ducted heat exchanger core manufacturing method of this invention enables the manufacture of conformal, high-reliability ducted heat exchangers, achieving industrial-scale manufacturing and significantly improving manufacturing and assembly efficiency and precision.

Description

Technical Field

[0001] This invention relates to the field of aviation lubricating oil heat exchanger manufacturing technology, specifically to a ducted heat exchange core structure and its forming method. Background Technology

[0002] As aircraft combat mission effectiveness improves, aircraft systems become more complex, placing higher demands on the utilization of onboard space. Simultaneously, aircraft stealth capabilities are becoming increasingly important. Ducted heat exchangers can fully utilize the engine duct space, using external ram air to cool high-temperature air. This not only improves the utilization rate of airframe space but also helps meet the aircraft's stealth requirements.

[0003] The research on ducted heat exchangers can expand our unit's research field of heat exchangers and provide strong support for in-depth research on conformal, high-strength, and high-efficiency heat exchangers. With the development of the engine industry, the application market prospects of ducted heat exchangers are broad. This conformal ducted heat exchanger technology fills the gap in our unit's conformal high-efficiency ducted heat exchangers and can further enhance our unit's leading position in the heat exchanger industry.

[0004] Currently, there are still shortcomings in the manufacturing technology of ducted heat exchangers, resulting in generally low processing efficiency. Due to the small aperture and tight fit of the heat exchange core, it is not easy to process. Furthermore, due to the thin and soft nature of the parts, deformation often occurs during assembly, processing, and welding, leading to an increased scrap rate. Summary of the Invention

[0005] The purpose of this invention is to provide a method for manufacturing a conformal adaptive duct heat exchanger structure, which can achieve high precision, high efficiency, and large-scale production and processing.

[0006] The technical solution of this invention is:

[0007] A ducted heat exchanger core structure is provided, which includes a flat tube, an upper side seal, a lower side seal, a middle seal, fins, an upper arc-shaped side plate, and a lower arc-shaped side plate; multiple parallel flow channels are formed in the flat tube; the upper arc-shaped side plate and the lower arc-shaped side plate are arranged in parallel, forming an arc-shaped space between them;

[0008] The upper side seal, lower side seal, and middle seal are all strip-shaped plates. The upper edge surfaces of the lower side seal and the middle seal are formed with positioning teeth at equal intervals. The lower edge surfaces of the upper side seal and the middle seal are formed with positioning grooves at equal intervals. The upper edge surface of the upper side seal and the lower edge surface of the lower side seal are both arc surfaces.

[0009] A partition is formed by sequentially splicing an upper side seal, multiple middle seals, and a lower side seal from top to bottom, and the partition has rectangular holes arranged in a matrix. The upper and lower adjacent seals are connected by positioning teeth and positioning grooves, and the height of the positioning teeth is greater than the depth of the positioning grooves, so that the rectangular holes are formed between the positioning teeth of the lower seal. The outline of the rectangular hole is the same as the cross-sectional outline of the flat tube. The multiple partitions are arranged in parallel to divide the arc-shaped space into multiple independent spaces. Multiple flat tubes are inserted parallel to each other through the corresponding rectangular holes on each partition and fixed as a whole. The fins are filled and fixed between each adjacent seal, and the fins are fixed as a whole with the adjacent flat tubes.

[0010] Furthermore, the fins are W-shaped fins.

[0011] Furthermore, the top of the positioning tooth and the bottom of the positioning groove are both arc-shaped and their shapes are adapted to each other.

[0012] Furthermore, the parallel flow channels in the flat tube have a square cross-section.

[0013] Furthermore, the fin material is a corrugated metal plate.

[0014] The molding method of the ducted heat exchanger core structure includes the following specific steps:

[0015] The arc-shaped space is divided into layers according to the height of the sealing strips, from the lower arc-shaped side plate to the upper arc-shaped side plate. Each layer is laid out as follows: sealing strips are set parallel to the arc, fins are filled between adjacent sealing strips, flat tubes are inserted into the positioning teeth along the arc, and the middle sealing strips are inserted into the corresponding sealing strips of the upper and lower layers. The upper side sealing strip is attached to the upper arc-shaped side plate, and the lower side sealing strip is attached to the lower arc-shaped side plate. The positioning teeth of the lower layer sealing strip are inserted into the positioning grooves of the upper layer sealing strip for positioning. Solder foil is placed between the laid components. After each layer is laid out, the whole structure is heated and welded.

[0016] Furthermore, solder foil is laid before each layer is laid.

[0017] Furthermore, solder foil is provided on the upper surface of the lower arc-shaped side plate and the lower surface of the upper arc-shaped side plate.

[0018] The advantages of this invention are: the duct heat exchanger core manufacturing method of this invention can realize the manufacturing of conformal high-reliability duct heat exchangers, and it can realize industrialized manufacturing, which can significantly improve manufacturing and assembly efficiency and improve assembly accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the fin structure;

[0021] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0022] Figure 4 This is a schematic diagram of the middle seal structure;

[0023] Figure 5 This is a schematic diagram of the lower side seal.

[0024] Figure 6 This is a structural diagram of the upper side seal;

[0025] Figure 7 This is a schematic diagram of the flat tube structure;

[0026] Figure 8 yes Figure 7 A magnified view of a portion of the image;

[0027] In the diagram: 1. Flat tube; 2. Upper side seal; 3. Lower side seal; 4. Middle seal; 5. Fin; 6. Upper arc-shaped side plate; 7. Lower arc-shaped side plate; 8. Solder foil. Detailed Implementation

[0028] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0029] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] See appendix Figure 1 -8. An embodiment is provided as follows: a ducted heat exchanger core structure, wherein the ducted heat exchanger core includes a flat tube, an upper side seal, a lower side seal, a middle seal, fins, an upper arc-shaped side plate, and a lower arc-shaped side plate; multiple parallel flow channels are formed in the flat tube; the upper arc-shaped side plate and the lower arc-shaped side plate are arranged in parallel, forming an arc-shaped space between them;

[0031] The upper side seal, lower side seal, and middle seal are all strip-shaped plates. The upper edge surfaces of the lower side seal and the middle seal are formed with positioning teeth at equal intervals. The lower edge surfaces of the upper side seal and the middle seal are formed with positioning grooves at equal intervals. The upper edge surface of the upper side seal and the lower edge surface of the lower side seal are both arc surfaces.

[0032] By sequentially splicing the upper side seal, multiple middle seals, and the lower side seal from top to bottom, a partition is formed, and the partition has rectangular holes arranged in a matrix. The upper and lower adjacent seals are connected by positioning teeth and positioning grooves, and the height of the positioning teeth is greater than the depth of the positioning grooves, so that the rectangular holes are formed between the positioning teeth of the lower seal. The outline of the rectangular holes is the same as the cross-sectional outline of the flat tube. The multiple partitions are arranged in parallel to divide the arc-shaped space into multiple independent spaces.

[0033] The molding method of the ducted heat exchanger core structure includes the following specific steps:

[0034] The arc-shaped space is divided into layers according to the height of the sealing strips, from the lower arc-shaped side plate to the upper arc-shaped side plate. Each layer is laid out as follows: sealing strips are set parallel to the arc, fins are filled between adjacent sealing strips, flat tubes are inserted into the positioning teeth along the arc, and the middle sealing strips are inserted into the corresponding sealing strips of the upper and lower layers. The upper side sealing strip is attached to the upper arc-shaped side plate, and the lower side sealing strip is attached to the lower arc-shaped side plate. The positioning teeth of the lower layer sealing strip are inserted into the positioning grooves of the upper layer sealing strip for positioning. Solder foil is placed between the laid components. After each layer is laid out, the whole structure is heated and welded.

[0035] The fins are W-shaped fins.

[0036] The top of the positioning tooth and the bottom of the positioning groove are both arc-shaped and their shapes are compatible.

[0037] The parallel flow channels in the flat tube have a square cross-section.

[0038] The fins are made of corrugated metal.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A ducted heat exchanger core structure, characterized in that... The ducted heat exchanger core structure includes a flat tube, an upper side seal, a lower side seal, a middle seal, fins, an upper arc-shaped side plate, and a lower arc-shaped side plate; multiple parallel flow channels are formed in the flat tube; the upper arc-shaped side plate and the lower arc-shaped side plate are arranged in parallel, forming an arc-shaped space between them; The upper side seal, lower side seal, and middle seal are all strip-shaped plates. The upper edge surfaces of the lower side seal and the middle seal are formed with positioning teeth at equal intervals. The lower edge surfaces of the upper side seal and the middle seal are formed with positioning grooves at equal intervals. The upper edge surface of the upper side seal and the lower edge surface of the lower side seal are both arc surfaces. A top side seal, multiple middle seals, and a bottom side seal are sequentially inserted from top to bottom to form a partition, and the partition has rectangular holes arranged in a matrix. Adjacent top and bottom seals are connected by positioning teeth and positioning grooves, with the height of the positioning teeth greater than the depth of the positioning grooves, thus forming rectangular holes between the positioning teeth of the bottom seal. The outline of the rectangular holes is the same as the cross-sectional outline of the flat tubes. Multiple partitions are arranged in parallel to divide the arc-shaped space into multiple independent spaces. Multiple flat tubes are inserted parallel to each other through the corresponding rectangular holes on each partition and fixed as a whole. Fins are filled and fixed between adjacent seals, and the fins are fixed as a whole to the adjacent flat tubes.

2. The ducted heat exchanger core structure according to claim 1, characterized in that... The fins are W-shaped fins.

3. The ducted heat exchanger core structure according to claim 1, characterized in that... The top of the positioning tooth and the bottom of the positioning groove are both arc-shaped and their shapes are compatible.

4. The ducted heat exchanger core structure according to claim 1, characterized in that... The parallel flow channels in the flat tube have a square cross-section.

5. The ducted heat exchanger core structure according to claim 1, characterized in that... The fins are made of corrugated metal.

6. The molding method of the ducted heat exchanger core structure as described in any one of claims 1-5, wherein the specific steps are as follows: The arc-shaped space is divided into layers according to the height of the sealing strips, from the lower arc-shaped side plate to the upper arc-shaped side plate. Each layer is laid out as follows: sealing strips are set parallel to the arc, fins are filled between adjacent sealing strips, flat tubes are inserted into the positioning teeth along the arc, and the middle sealing strips are inserted into the corresponding sealing strips of the upper and lower layers. The upper side sealing strip is attached to the upper arc-shaped side plate, and the lower side sealing strip is attached to the lower arc-shaped side plate. The positioning teeth of the lower layer sealing strip are inserted into the positioning grooves of the upper layer sealing strip for positioning. Solder foil is placed between the laid components. After each layer is laid out, the whole structure is heated and welded.

7. The method for forming the ducted heat exchanger core structure according to claim 6, characterized in that... Solder foil is laid before each layer is laid.

8. The method for forming the ducted heat exchanger core structure according to claim 6, characterized in that... Solder foil is provided on the upper surface of the lower arc-shaped side plate and the lower surface of the upper arc-shaped side plate.

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