Air flow uniform diffusion annular air heat exchanger guide structure

Abstract

The application discloses a ring-shaped heat exchanger guide structure with uniform airflow diffusion, which comprises a guide structure main body, a first sector blade, a second sector blade and a third sector blade with guide holes; wherein the guide structure main body is in a ring shape, a circle of air guide cavities is formed on the circumference of the guide structure main body, the air guide cavities have bottom surfaces, and the first sector blade, the second sector blade and the third sector blade are installed in the air guide cavities; wherein the first sector blade is located at a position close to the upper end of the air guide cavities, the third sector blade is located at a position close to the bottom of the air guide cavities, the second sector blade is located between the first sector blade and the third sector blade, and the three are distributed at equal intervals; a section of air guide grooves is formed between the two ends of the first sector blade and the side walls of the air guide cavities; an air inlet guide pipe is circumscribed on the bottom surface of the guide structure main body, and the axis of the air inlet guide pipe passes through the symmetric line center points of the first sector blade, the second sector blade and the third sector blade.

Description

Technical Field

[0001] This invention relates to the field of aircraft thermal control technology, and more specifically to a ring-shaped air heat exchanger guide structure for uniform airflow diffusion. Background Technology

[0002] With the rapid development of aviation technology, high-performance heat exchangers play a crucial role in the environmental maintenance and control of aircraft. Their function is to cool high-temperature fluids such as lubricating oil and fuel in aircraft using low-temperature air. However, it is difficult to distribute the air evenly in the circumferential direction after it is supplied from the pipe. The main function of the flow guiding structure is to distribute the airflow entering the heat exchanger evenly throughout the entire annular heat exchanger, thereby achieving a more efficient heat exchange effect.

[0003] However, existing annular heat exchanger flow guide structures suffer from problems such as uneven flow distribution, low heat exchange efficiency, complex structure, and high cost. These problems directly affect the heat exchange effect and can even lead to uneven temperature distribution within the heat exchanger, reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a flow guide structure for an annular air heat exchanger that allows for uniform airflow diffusion, thereby solving problems such as uneven distribution, low heat exchange efficiency, and high cost in existing annular heat exchanger flow guide structures.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A flow guiding structure for an annular heat exchanger with uniform airflow diffusion includes a main body of the flow guiding structure and a first sector blade, a second sector blade, and a third sector blade with flow guiding holes; wherein:

[0007] The main body of the flow guiding structure is a ring structure, and a ring of air guiding chambers is formed on the circumference of the main body of the flow guiding structure. The air guiding chambers have a bottom surface, and the first fan-shaped blade, the second fan-shaped blade, and the third fan-shaped blade are installed in the air guiding chambers. The first fan-shaped blade is located near the upper end of the air guiding chamber, the third fan-shaped blade is located near the bottom of the air guiding chamber, and the second fan-shaped blade is located between the first fan-shaped blade and the third fan-shaped blade, with the three blades distributed at equal intervals.

[0008] The arc centers of the first, second, and third sector blades are located on the central axis of the main body of the flow guiding structure, and the three symmetrical center lines of the first, second, and third sector blades are equidistant and parallel, and pass through the axis of the main body of the flow guiding structure.

[0009] An air guide groove is formed between the two ends of the first sector blade and the side wall of the air guide cavity.

[0010] An air intake guide pipe is connected to the bottom surface of the main body of the air guide structure, and the air intake guide pipe is connected to the inside of the air guide cavity; the axis of the air intake guide pipe passes through the center point of the symmetry line of the first sector blade, the second sector blade, and the third sector blade.

[0011] Furthermore, the main body of the flow guiding structure consists of an outer ring plate, an inner ring plate coaxially arranged inside the outer ring plate, and an annular bottom plate arranged at the bottom of the outer ring plate and the inner ring plate. The outer ring plate, the inner ring plate, and the bottom plate together form the air guiding cavity.

[0012] Furthermore, the guide holes on the first, second, and third sector blades are arranged in an arc shape and are arranged in multiple rows at equal intervals; the spacing between adjacent guide holes is consistent, and the size of the guide holes is consistent.

[0013] Furthermore, a protruding mounting seat is provided on the outer circumference of the lower edge of the main body of the flow guiding structure. The mounting seat is used to install and fix the main body of the flow guiding structure into the air supply port of the annular heat exchanger.

[0014] Furthermore, the inner and outer arcs of the first sector blade are 270°, the inner and outer arcs of the second sector blade are 180°, and the inner and outer arcs of the third sector blade are 90°.

[0015] Furthermore, the spacing between the first, second, and third sector blades is 5mm-20mm, the thickness is 0.5mm-2mm, the radius of the inner arc is 100mm-450mm, and the radius of the outer arc is 300mm-650mm.

[0016] Furthermore, the guide hole is a rectangular hole, and the length of the guide hole passes through the axis of the main body of the guide structure; the guide hole is 5mm-20mm long and 0.5mm-2mm wide, and there is a gap between the two guide holes, with the short side gap being 4mm-15mm and the long side gap arc being 6°.

[0017] Furthermore, the number Y of the guide holes distributed in the first, second, and third sector blades is linearly distributed with respect to the arc length X of their inner and outer arcs in the form Y = N×, where N represents the number of rows of guide holes.

[0018] Furthermore, the intake guide pipe is a standard DN50 pipe, and the pipe length is 50mm-200mm.

[0019] Furthermore, the thickness of the mounting base is 3mm-10mm, and the outer edge of the mounting base has a rounded corner with a radius R = 0.5mm.

[0020] Compared with the prior art, the present invention has the following technical features:

[0021] The circular cap design results in a more compact structure, effectively utilizing space while being lighter and less expensive. The fan-shaped blade design ensures uniform airflow diffusion, avoiding the uneven flow distribution and poor heat exchange efficiency issues common in existing flow guide structures. The carefully designed density and shape of the flow guide holes ensure even airflow dispersion. The rectangular (but other shapes are also possible) flow guide holes allow for more even airflow into the annular heat exchanger, and the small holes prevent blockage when large volumes of cooling air enter the annular heat exchanger, further enhancing airflow uniformity. This uniformly diffused annular heat exchanger flow guide structure is not only simple in structure, easy to manufacture and maintain, but also meets the heat exchange requirements of aircraft in various environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 A half-section view;

[0024] Figure 3 This is a schematic diagram of the first sector-shaped blade structure in this invention;

[0025] Figure 4 This is a schematic diagram of the second sector-shaped blade structure in this invention;

[0026] Figure 5 This is a schematic diagram of the third sector-shaped blade structure in this invention;

[0027] Figure 6 This is a schematic diagram illustrating the working principle of the present invention installed in an annular heat exchanger.

[0028] The following are the labels in the diagram: 1 First sector blade, 2 Second sector blade, 3 Third sector blade, 4 Inlet guide pipe, 5 Main body of guide structure, 51 Base plate, 52 Outer ring plate, 53 Inner ring plate, 54 Air guide groove, 55 Air guide cavity, 6 Mounting seat, 7 Guide hole, 8 Inner arc, 9 Outer arc, 10 Bottom fillet of the inlet guide pipe, 11 Fillet of the mounting seat. Detailed Implementation

[0029] This invention proposes a ring-shaped heat exchanger flow guide structure based on uniform airflow diffusion design. This structure uses a circular cap as its overall appearance and consists of multiple fan-shaped blades arranged at equal intervals inside the circular cap. This uniformly distributes the airflow across the entire surface of the ring-shaped heat exchanger unit, improving heat exchange efficiency and achieving uniform distribution of pre-cooling airflow. The structure uses lightweight materials and is high-temperature resistant, meeting the requirements of aircraft applications. Compared to existing ring-shaped heat exchanger flow guide structures, it is simpler, more efficient, and easier to manufacture and maintain, thus satisfying the operational needs of aircraft.

[0030] Referring to the accompanying drawings, the present invention provides an annular heat exchanger flow guiding structure for uniform airflow diffusion, comprising three equidistantly arranged first sector blades 1, second sector blades 2, and third sector blades 3, each having internal flow guiding holes 7, and a flow guiding structure body 5 connecting and fixing the first sector blades 1, second sector blades 2, and third sector blades 3; wherein:

[0031] The main body of the flow guiding structure 5 is a ring structure, and a ring of air guiding chambers 55 is formed on the circumference of the main body of the flow guiding structure 5. The air guiding chambers 55 have a bottom surface, and the first fan-shaped blade 1, the second fan-shaped blade 2, and the third fan-shaped blade 3 are installed in the air guiding chambers 55. The first fan-shaped blade 1 is located near the upper end of the air guiding chamber 55, the third fan-shaped blade 3 is located near the bottom of the air guiding chamber 55, and the second fan-shaped blade 2 is located between the first fan-shaped blade 1 and the third fan-shaped blade 3. The three are distributed at equal intervals.

[0032] The main body of the flow guiding structure 5 consists of an outer ring plate 52, an inner ring plate 53 coaxially arranged inside the outer ring plate, and an annular bottom plate 51 arranged at the bottom of the outer ring plate and the inner ring plate. The outer ring plate, the inner ring plate and the bottom plate together form the air guiding cavity.

[0033] The arc centers of the first sector blade 1, the second sector blade 2, and the third sector blade 3 are located on the central axis of the main body of the flow guiding structure 5, and the three symmetrical center lines of the first sector blade 1, the second sector blade 2, and the third sector blade 3 are equidistant and parallel, and pass through the axis of the main body of the flow guiding structure 5; that is, the two ends of the third sector blade 3 are at the same distance as the two ends of the second sector blade 2, and the two ends of the second sector blade 2 are at the same distance as the two ends of the first sector blade 1.

[0034] A section of air guide groove 54 is formed between the two ends of the first sector blade 1 and the side wall of the air guide cavity; the air guide groove 54 is the part of the first sector blade 1 that does not cover the air guide cavity 55; the gas that does not pass through the guide hole 7 finally circulates in the air guide cavity 55 to the air guide groove 54 and is discharged.

[0035] The guide holes 7 on the first sector blade 1, the second sector blade 2, and the third sector blade 3 are arranged in an arc shape and are arranged in multiple rows at equal intervals; the spacing between adjacent guide holes is consistent, and the size of the guide holes 7 is consistent.

[0036] An air intake guide pipe 4 is connected to the bottom surface of the main body 5 of the air guide structure, and the air intake guide pipe 4 is connected to the inside of the air guide cavity; the axis of the air intake guide pipe 4 passes through the center point of the symmetry line of the first sector blade 1, the second sector blade 2, and the third sector blade 3.

[0037] A protruding mounting base 6 is provided on the outer circumference of the lower edge of the main body 5 of the flow guiding structure, and the mounting base 6 forms an integral part with the main body 5 of the flow guiding structure; the mounting base 6 is used to install and fix the main body 5 of the flow guiding structure into the air supply port of the annular heat exchanger.

[0038] In this design, the arc of the inner arc 8 and the arc of the outer arc 9 of the first fan-shaped blade 1 is 270°, the arc of the inner arc 8 and the arc of the outer arc 9 of the second fan-shaped blade 2 is 180°, the arc of the inner arc 8 and the arc of the outer arc 9 of the third fan-shaped blade 3 is 90°, and the distance between the first fan-shaped blade 1, the second fan-shaped blade 2, and the third fan-shaped blade 3 is 5mm-20mm.

[0039] The thickness of the first sector blade 1, the second sector blade 2, and the third sector blade 3 is 0.5mm-2mm, the radius of the inner arc 8 of the first sector blade 1, the second sector blade 2, and the third sector blade 3 is 100mm-450mm, and the radius of the outer arc 9 is 300mm-650mm.

[0040] In this scheme, the first sector blade 1, the second sector blade 2, and the third sector blade 3 have rectangular guide holes 7. The length direction of the guide holes 7 passes through the axis of the main body 5 of the guide structure. The rectangular guide holes 7 are 5mm-20mm long and 0.5mm-2mm wide. There is a gap between the two guide holes 7, and the gap between the short sides is 4mm-15mm, and the arc of the gap between the long sides is 6°. The number Y of the guide holes 7 distributed in the first sector blade 1, the second sector blade 2, and the third sector blade 3 is linearly distributed with respect to the arc X of their inner arc 8 and outer arc 9, which is Y=NX, where N represents the number of rows of guide holes 7.

[0041] In this design, the intake guide pipe 4 is a standard DN50 pipe, and the length of the guide pipe 4 is 50mm-200mm. The connection between the guide pipe 4 and the main body of the guide structure 5 is fixed by using high temperature to form an alloy in the contact part of the metal. The inner end of the connection between the guide pipe 4 and the main body of the guide structure 5 has an intake guide pipe bottom drainage radius 10, and the radius R of the intake guide pipe bottom drainage radius 10 is 2mm.

[0042] In this design, the thickness of the mounting base 6 is 3mm-10mm, and the outer edge of the mounting base 6 has two mounting base rounded corners 11, with a radius R = 0.5mm for each rounded corner 11.

[0043] Example:

[0044] The annular heat exchanger flow guiding structure for uniform airflow diffusion provided by the present invention mainly consists of an air inlet guide pipe 4, a flow guiding structure body 5, and three fan-shaped blades 1, 2, and 3 at different angles.

[0045] First, manufacturing the main body 5 of the flow guiding structure requires selecting a lightweight, high-temperature metal material and machining it using machine tools such as CNC lathes. The main body 5 is first milled into a hollow, flat tube-shaped ring. Simultaneously, the main body 5 requires surface treatment to make it smooth, rust-proof, and heat-resistant.

[0046] Next, three fan-shaped blades 1, 2, and 3 at different angles need to be manufactured and placed inside the main body 5 of the flow guide structure. Flow guide holes 7 are then formed inside the first fan-shaped blade 1, the second fan-shaped blade 2, and the third fan-shaped blade 3 by laser cutting or drilling. The flow guide holes 7 are of uniform size, and the flow guide holes 7 on each blade are arranged concentrically and equidistantly inside. The thickness of these blades and the shape and angle of the flow guide holes are consistent, and they are arranged at equal intervals inside the circular cover. During the manufacturing of these fan-shaped blades, machine tools can be used for cutting, drilling, and edge bending.

[0047] Finally, the first sector blade 1, the second sector blade 2, and the third sector blade 3 are connected inside the main body of the flow guide structure 5, and the air intake guide pipe 4 is connected to the main body of the flow guide structure 5. The high temperature released by the laser causes the metal at the contact points to form an alloy, thereby fixing the guide pipe 4 to the main body of the flow guide structure 5. To prevent uneven airflow distribution in the air intake guide pipe, the bottom guide radius 10 is necessary in the design of the guide pipe 4. The mounting base 6 is used to securely install the main body of the flow guide structure 5 to the air inlet of the annular heat exchanger. Its outer edge has two mounting radius 11 to ensure safety throughout the installation process.

[0048] The working principle of the flow guiding structure in the annular heat exchanger is as follows: Figure 6As shown, the flow guiding structure of the annular heat exchanger of the present invention is installed at the air supply port of the annular heat exchanger, and the inlet and outlet pipes are connected. After the cooling airflow a enters the flow guiding structure, a large amount of cooling airflow a will be blocked through the narrow flow guiding hole 7. Then, the blades will disperse the blocked cooling airflow a throughout the entire interior of the annular heat exchanger, thereby making the cooling airflow a uniformly distributed. Then, the cooling airflow a will have more thorough heat exchange with the 1800K high-temperature fluid b. The cooled return flow a after heat exchange is discharged through the return channel. The 900K hot fluid b after heat exchange passes through the inner layer of the annular heat exchanger and is discharged along the axial direction of the annular heat exchanger. The uniform distribution of the cooling airflow a through the flow guiding structure of the annular heat exchanger achieves an effective heat exchange effect.

[0049] This invention provides a technology for a flow guide structure in an annular air heat exchanger that enables uniform diffusion of cooling airflow. Addressing the need for uniform inlet airflow distribution in existing annular air heat exchangers, and the problems of poor flow distribution uniformity, low heat exchange efficiency, and high cost associated with conventional flow guide structures, this invention proposes an innovative circular cap-shaped flow guide structure for annular air heat exchangers. This structure consists of multiple fan-shaped blades, each with a different area, thickness, and the same shape and angle as the flow guide orifice, arranged at equal intervals inside the circular cap. When airflow passes through the circular cap, the high-flow-rate airflow passing through the narrow flow guide orifice causes blockage. The blades then disperse the blocked airflow throughout the entire annular heat exchanger, resulting in uniform airflow distribution and effective heat exchange. This structure is lightweight, high-temperature resistant, and low in complexity. Compared to existing designs, this invention is simpler, more efficient, and easier to manufacture and maintain. By achieving uniform airflow diffusion, this invention can improve the heat exchanger's heat exchange efficiency, meeting the heat exchange requirements of aircraft.

[0050] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A flow guiding structure for an annular heat exchanger with uniform airflow diffusion, characterized in that, It includes a main body of the flow guiding structure (5) and a first sector blade (1), a second sector blade (2), and a third sector blade (3) with flow guiding holes (7); wherein: The main body of the flow guiding structure (5) is a ring structure. A ring of air guiding chambers (55) is formed on the circumference of the main body of the flow guiding structure (5). The air guiding chambers (55) have a bottom surface. The first fan-shaped blade (1), the second fan-shaped blade (2), and the third fan-shaped blade (3) are installed in the air guiding chambers (55). The first fan-shaped blade (1) is located near the bottom of the air guiding chamber (55), the third fan-shaped blade (3) is located near the top of the air guiding chamber (55), and the second fan-shaped blade (2) is located between the first fan-shaped blade (1) and the third fan-shaped blade (3). The three are evenly distributed. The arc centers of the first fan-shaped blade (1), the second fan-shaped blade (2), and the third fan-shaped blade (3) are located on the central axis of the main body of the flow guiding structure (5), and the three symmetrical center lines of the first fan-shaped blade (1), the second fan-shaped blade (2), and the third fan-shaped blade (3) are equidistant and parallel, and pass through the axis of the main body of the flow guiding structure (5). An air guide groove (54) is formed between the two ends of the first sector blade (1) and the side wall of the air guide cavity (55); An air intake guide pipe (4) is connected to the bottom surface of the main body (5) of the air guide structure, and the air intake guide pipe (4) is connected to the interior of the air guide cavity (55); the axis of the air intake guide pipe (4) passes through the center point of the symmetry line of the first sector blade (1), the second sector blade (2), and the third sector blade (3).

2. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The main body of the flow guiding structure (5) consists of an outer ring plate (52), an inner ring plate (53) coaxially arranged inside the outer ring plate, and an annular bottom plate (51) arranged at the bottom of the outer ring plate and the inner ring plate. The outer ring plate, the inner ring plate and the bottom plate together form the air guiding cavity (55).

3. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The guide holes (7) on the first fan-shaped blade (1), the second fan-shaped blade (2), and the third fan-shaped blade (3) are arranged in an arc shape and are arranged in multiple rows at equal intervals; the spacing between adjacent guide holes is consistent, and the size of the guide holes (7) is consistent.

4. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, A protruding mounting seat (6) is provided on the outer circumference of the lower edge of the main body of the flow guiding structure (5). The mounting seat (6) is used to install and fix the main body of the flow guiding structure (5) into the air supply port of the annular heat exchanger.

5. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The inner arc (8) and outer arc (9) of the first fan-shaped blade (1) have an arc of 270°, the inner arc (8) and outer arc (9) of the second fan-shaped blade (2) have an arc of 180°, and the inner arc (8) and outer arc (9) of the third fan-shaped blade (3) have an arc of 90°.

6. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The spacing between the first sector blade (1), the second sector blade (2), and the third sector blade (3) is 5mm-20mm, the thickness is 0.5mm-2mm, the radius of the inner arc (8) is 100mm-450mm, and the radius of the outer arc (9) is 300mm-650mm.

7. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The guide hole (7) is a rectangular hole, and the length direction of the guide hole (7) passes through the axis of the main body (5) of the guide structure. The guide hole (7) is 5mm-20mm long and 0.5mm-2mm wide. There is a gap between the two guide holes (7), and the gap between the short sides is 4mm-15mm and the arc of the gap between the long sides is 6°.

8. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The number Y of the guide holes (7) distributed on the first sector blade (1), the second sector blade (2), and the third sector blade (3) is linearly distributed with respect to the arc X of their inner arc (8) and outer arc (9) in the form Y = kNX, where N represents the number of rows of guide holes (7) and k is the number of holes per unit arc in each row of guide holes.

9. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 1, characterized in that, The intake guide pipe (4) is a standard DN50 pipe, and the length of the intake guide pipe (4) is equal to 50mm-200mm.

10. The annular heat exchanger flow guiding structure for uniform airflow diffusion according to claim 4, characterized in that, The thickness of the mounting base (6) is 3mm-10mm, and the outer edge of the mounting base (6) has a mounting base fillet (11) with a radius R = 0.5mm.

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