High-temperature-resistant self-adjusting plate heat exchanger

Abstract

The invention discloses a high-temperature-resistant self-adjusting plate heat exchanger. An upper partition plate (2), a middle partition plate A (3), a middle partition plate B (4) and a lower partition plate (5) are sequentially arranged between the two end plates (1) from top to bottom; a heat dissipation core body (6) is arranged between the upper partition plate (2) and the middle partition plate A (3), and a heat dissipation core body (6) is also arranged between the middle partition plate B (4) and the lower partition plate (5); each heat dissipation core body (6) is hooped by more than one hooping assembly (7) arranged along the length direction; the upper U-shaped rib (7.1) is arranged on the upper surface of the upper partition plate (2), the transition beam (7.2) is arranged between the middle partition plate A and the middle partition plate B, the lower U-shaped rib (7.3) is arranged on the lower surface of the lower partition plate (5), and the pull rod (7.4) is used for tensioning the upper U-shaped rib (7.1), the transition beam (7.2) and the lower U-shaped rib (7.3). Deformation compensation of all components under the high-temperature condition can be achieved, on one hand, the product rigidity is improved, and on the other hand, the strength requirement is met.

Description

Technical Field

[0001] The present invention belongs to the field of precooling technology in the field of hypersonic aircraft and high-temperature cooling thermal management, and specifically relates to a high-temperature resistant self-regulating plate heat exchanger. Background Art

[0002] With the continuous development of aerospace technology, hypersonic aircraft have become one of the research topics in the future. Hypersonic aircraft will be subjected to extreme aerodynamic heating environment during flight, so thermal management is particularly important. In particular, a large amount of heat is generated. Therefore, an efficient heat dissipation system is required to ensure that the temperature of the internal structure and equipment of the aircraft is within a safe range. Therefore, it is required to have efficient heat dissipation capabilities, thermal management technology that can adapt to extreme temperature changes, and specify heat dissipation solutions for specific parts. Traditional plate-fin heat exchangers cannot meet the thermal compensation problems of products under large temperature differences, and are very likely to cause cracking problems. Therefore, in order to meet the heat exchange capacity under high compactness conditions, plate-fin heat exchangers with thermal compensation functions are continuously designed. Summary of the invention

[0003] The purpose of the present invention is to provide a high temperature resistant self-adjusting plate heat exchanger. The present invention can realize deformation compensation of various components under high temperature conditions, on the one hand, improve product rigidity, on the other hand, meet strength requirements, broaden the use range of plate-fin heat exchangers under high temperature conditions, and can be widely used in the design of subsequent high temperature alloy precoolers.

[0004] The technical solution of the present invention is: a high-temperature resistant self-regulating plate heat exchanger, comprising a pair of end plates, between which an upper partition, a middle partition A, a middle partition B and a lower partition are arranged in sequence from top to bottom; a heat dissipation core is arranged between the upper partition and the middle partition A, and a heat dissipation core is also arranged between the middle partition B and the lower partition; each heat dissipation core is clamped by one or more clamping assemblies arranged along the length direction; the clamping assembly comprises an upper U-shaped rib arranged on the upper surface of the upper partition, a transition beam arranged between the middle partitions A and B, a lower U-shaped rib arranged on the lower surface of the lower partition and a pull rod used to tighten the upper U-shaped rib, the transition beam and the lower U-shaped rib.

[0005] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the upper partition, the middle partition A, the middle partition B and the lower partition are all provided with one or more compensating ribs along the length direction; the protruding direction of each compensating rib is away from the heat dissipation core; the compensating ribs of the upper partition and the upper U-shaped ribs are staggered along the length direction, the compensating ribs of the middle partitions A and B and the transition beams are staggered along the length direction, and the compensating ribs of the lower partition and the lower U-shaped ribs are staggered along the length direction.

[0006] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the edge of the middle partition A is provided with a flange structure along the length direction, and a limiting groove is formed between adjacent flange structures for limiting the transition beam; the transition beam is a closed hollow beam structure.

[0007] In the aforementioned high temperature resistant self-regulating plate heat exchanger, a frame groove is provided on the inner side of the end plate for positioning the heat dissipation core.

[0008] In the aforementioned high-temperature resistant self-regulating plate heat exchanger, the heat dissipation core includes more than one flat tube stacked up and down, the inner cavity of the flat tube is equipped with fin A, and fin B is installed between two adjacent flat tubes; the flow direction of fin A is from one end of the flat tube to the other end, and the flow direction of fin B is perpendicular to the flow direction of fin A; both ends of the flat tube are flared structures, the flared structures are inserted into the frame groove and are limited, and the flared structures of adjacent flat tubes are in contact in the normal direction of the flat tube.

[0009] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the contact surfaces of two adjacent flared structures and the matching surfaces between the flared structure and the frame groove are fixed by brazing.

[0010] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the upper baffle, the middle baffle A and the heat dissipation core therebetween are fixed by brazing, and the middle baffle B, the lower baffle and the heat dissipation core therebetween are also fixed by brazing.

[0011] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the ends of the upper partition plate and the lower partition plate are inserted into the end plate and fixed by brazing.

[0012] In the aforementioned high temperature resistant self-regulating plate heat exchanger, the pull rods between the upper partition and the middle partition A and between the middle partition B and the lower partition are all provided with positioning tubes, which are used to position the distance between the upper U-shaped rib and the transition beam, and between the transition beam and the lower U-shaped rib respectively.

[0013] The advantages of the present invention are as follows: the present invention designs compensating ribs on each partition, and reserves a pressing space between two adjacent compensating ribs on each partition for assembling U-shaped ribs or transition beams, wherein the pull rod passes through the U-shaped ribs and the transition beam to form a clamping assembly to clamp each heat dissipation core; this structure can transmit force to each heat dissipation core in turn, meet the pressing force requirements during brazing, and improve brazing reliability.

[0014] The present invention inserts the upper and lower partitions into the slots on the end plates for brazing, thereby achieving integrated brazing of the product, ensuring the installation positioning and connection rigidity of the core body, and controlling the anti-deformation value of the core body within 0.5%.

[0015] The present invention designs a frame groove on the end plate, in which the expansion structure of the flat tube can be assembled. The flat tube is provided with brazing material, and the flat tube can be welded in the frame groove during brazing, which effectively improves the sealing reliability of the heat dissipation core, avoids the core corrosion caused by laying too much brazing material, and controls the strength of the fin to be 80% of the parent material.

[0016] The present invention designs expansion structures at both ends of the flat tube, which can not only increase the flow area, but also reduce the local resistance loss when the fluid flows into and out of the heat dissipation core; in addition, fins A are arranged in the inner cavity of the flat tube, and fins B are arranged in the channel formed by the contact of the expansion structure between two adjacent flat tubes; this structure eliminates the arrangement of seals, reduces the weight of the product, and improves the power-to-weight ratio by 3kW / kg.

[0017] The present invention arranges compensating ribs on each partition and realizes the pre-tightening effect on the heat dissipation core by tightening the clamping assembly. The compensating ribs can compensate for the expansion effect under high temperature, widen the operating temperature range of the plate-fin heat exchanger, and improve the core's anti-deformation ability by more than 5% under high temperature conditions.

[0018] The hollow closed beam structure of the transition beam arranged in the present invention can not only compensate the overall height of the core body when the core body is assembled, but also compensate the deformation under high temperature conditions, further solving the material stress problem under high temperature. In addition, the closed structure at the end of the beam and the flange structure of the middle partition A form a blocking surface, preventing the medium from flowing out of the heat dissipation core without flowing through the fins B, resulting in insufficient heat exchange, and ensuring that the heat exchange efficiency is above 80%.

[0019] When brazing traditional products, it is necessary to set pressing flat plate tooling on both the upper and lower side plates of the core body. The clamping assembly designed in the present invention can replace the function of the tooling, and thus the design of the flat plate tooling can be eliminated during brazing, and the heat dissipation core can be directly brazed by pressing the U-shaped ribs, which effectively reduces the manufacturing cost, reduces the design and manufacture of the brazing tooling, and improves the product batch production capacity by more than 10%.

[0020] In summary, the present invention creatively proposes a high-temperature resistant self-regulating plate heat exchanger structure, which breaks the flat structural design of the traditional plate-fin heat exchanger. By designing compensating ribs on the upper and lower side panels and connecting the thermal compensation structure of the compensation product at high temperature through tie rods, it provides design ideas for the subsequent design of high-temperature heat exchangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 The main figure of the present invention;

[0023] Figure 3 This is a structural diagram of the present invention after removing the heat dissipation core;

[0024] Figure 4 It is a schematic diagram of the heat dissipation core;

[0025] Figure 5 It is a schematic diagram of a flat tube;

[0026] Figure 6 It is a schematic diagram of the middle partition A;

[0027] Figure 7 It is a schematic diagram of the outer side of the end plate;

[0028] Figure 8 This is a schematic diagram of the inner side of the end plate;

[0029] Fig. 9 It is a schematic diagram of the transition beam;

[0030] Fig.10 Schematic diagram of middle partition B. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Example 1. A high temperature resistant self-regulating plate heat exchanger, see Figure 1-Figure 10, comprising a pair of end plates 1, between which an upper partition 2, a middle partition A3, a middle partition B4 and a lower partition 5 are arranged in sequence from top to bottom; a heat dissipation core 6 is arranged between the upper partition 2 and the middle partition A3, and a heat dissipation core 6 is also arranged between the middle partition B4 and the lower partition 5; each heat dissipation core 6 is clamped by one or more clamping components 7 arranged along the length direction; the clamping component 7 comprises an upper U-shaped rib 7.1 arranged on the upper surface of the upper partition 2, a transition beam 7.2 arranged between the middle partitions A and B, a lower U-shaped rib 7.3 arranged on the lower surface of the lower partition 5 and a pull rod 7.4 for tightening the upper U-shaped rib 7.1, the transition beam 7.2 and the lower U-shaped rib 7.3.

[0035] Traditional plate-fin heat exchangers are mainly welded together with straight fins, straight partitions, seals, etc. The present invention assembles the end plate, the partition with a thermal compensation structure, the frame, the heat dissipation core, U-shaped ribs, tie rods, nuts, and transition beams as a whole. The thermal compensation structure of the partition can solve the deformation problem under high temperature conditions. In addition, by designing the tie rod, on the one hand, it is used to provide a pre-tightening force for the heat exchanger during the brazing process, eliminating the design of tooling and thus improving production efficiency. On the other hand, it reduces the stress of the internal structure of the heat exchanger core under high temperature conditions. It creatively proposes a solution to the expansion and stress problems under high temperature conditions on the high temperature resistant plate heat exchanger, while reducing the design of tooling. It has groundbreaking benefits both in structure and processability.

[0036] The aforementioned upper partition 2, middle partition A3, middle partition B4 and lower partition 5 are all provided with more than one compensating rib 8 along the length direction; the protruding direction of each compensating rib 8 is away from the heat dissipation core 6; the compensating rib 8 of the upper partition 2 and the upper U-shaped rib 7.1 are staggered along the length direction, the compensating rib 8 of the middle partitions A and B and the transition beam 7.2 are staggered along the length direction, and the compensating rib 8 of the lower partition 5 and the lower U-shaped rib 7.3 are staggered along the length direction.

[0037] The edge of the aforementioned middle partition A3 is provided with a flange structure 3.1 along the length direction, and a limiting groove 3.2 is formed between adjacent flange structures 3.1 for limiting the transition beam 7.2; the transition beam 7.2 is a closed hollow beam structure.

[0038] The inner side surface of the aforementioned end plate 1 is provided with a frame groove 1.1 for positioning the heat dissipation core 6.

[0039] The aforementioned heat dissipation core 6 comprises more than one flat tube 6.1 stacked up and down, the inner cavity of the flat tube 6.1 is equipped with fin A6.2, and fin B6.3 is installed between two adjacent flat tubes 6.1; the flow direction of fin A6.2 is from one end of the flat tube 6.1 to the other end, and the flow direction of fin B6.3 is perpendicular to the flow direction of fin A6.2; both ends of the flat tube 6.1 are expanded structure 6.4, the expanded structure 6.4 is inserted into the frame groove 1.1 and is limited, and the expanded structures 6.4 of adjacent flat tubes 6.1 are in contact with each other in the normal direction of the flat tube 6.1.

[0040] The contact surfaces of two adjacent flared structures 6.4 and the matching surfaces between the flared structure and the frame groove 1.1 are fixed by brazing.

[0041] The aforementioned upper partition plate 2, middle partition plate A3 and the heat dissipation core 6 therebetween are fixed by brazing, and the middle partition plate B4, lower partition plate 5 and the heat dissipation core 6 therebetween are also fixed by brazing.

[0042] The ends of the upper partition plate 2 and the lower partition plate 5 are inserted into the end plate 1 and fixed by brazing.

[0043] The rods 7.4 between the upper partition 2 and the middle partition A3 and between the middle partition B4 and the lower partition 5 are all covered with positioning tubes 9, which are used to locate the distance between the upper U-shaped rib 7.1 and the transition beam 7.2, and between the transition beam 7.2 and the lower U-shaped rib 7.3. In order to restrict the height of the upper and lower core bodies, positioning tubes are installed on the rods to realize the positioning of the upper and lower core bodies and ensure the position and size of the core bodies.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A high temperature resistant self-adjusting plate heat exchanger, characterized in that: The invention comprises a pair of end plates (1), wherein an upper partition plate (2), a middle partition plate A (3), a middle partition plate B (4) and a lower partition plate (5) are arranged in sequence from top to bottom between the two end plates (1); a heat dissipation core (6) is arranged between the upper partition plate (2) and the middle partition plate A (3), and a heat dissipation core (6) is also arranged between the middle partition plate B (4) and the lower partition plate (5); each heat dissipation core (6) is clamped by one or more clamping assemblies (7) arranged along the length direction; the clamping assembly (7) comprises an upper U-shaped rib (7.1) arranged on the upper surface of the upper partition plate (2), a transition beam (7.2) arranged between the middle partition plates A and B, a lower U-shaped rib (7.3) arranged on the lower surface of the lower partition plate (5), and a pull rod (7.4) used to tighten the upper U-shaped rib (7.1), the transition beam (7.2) and the lower U-shaped rib (7.3).

2. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The upper partition (2), the middle partition A (3), the middle partition B (4) and the lower partition (5) are all provided with one or more compensating ribs (8) along the length direction; the protruding direction of each compensating rib (8) is away from the heat dissipation core (6); the compensating ribs (8) of the upper partition (2) and the upper U-shaped ribs (7.1) are arranged alternately along the length direction, the compensating ribs (8) of the middle partitions A and B and the transition beams (7.2) are arranged alternately along the length direction, and the compensating ribs (8) of the lower partition (5) and the lower U-shaped ribs (7.3) are arranged alternately along the length direction.

3. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The edge of the middle partition plate A (3) is provided with a flange structure (3.1) along the length direction, and a limiting groove (3.2) is formed between adjacent flange structures (3.1) for limiting the transition beam (7.2); the transition beam (7.2) is a closed hollow beam structure.

4. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The inner side surface of the end plate (1) is provided with a frame groove (1.1) for positioning the heat dissipation core (6).

5. The high temperature resistant self-adjusting plate heat exchanger according to claim 4, characterized in that: The heat dissipation core (6) comprises more than one flat tube (6.1) stacked up and down, the inner cavity of the flat tube (6.1) is equipped with a fin A (6.2), and a fin B (6.3) is installed between two adjacent flat tubes (6.1); the flow direction of the fin A (6.2) is from one end of the flat tube (6.1) to the other end, and the flow direction of the fin B (6.3) is perpendicular to the flow direction of the fin A (6.2); both ends of the flat tube (6.1) are expanded structures (6.4), the expanded structures (6.4) are inserted into the frame groove (1.1) and are limited, and the expanded structures (6.4) of adjacent flat tubes (6.1) are in contact with each other in the normal direction of the flat tube (6.1).

6. The high temperature resistant self-adjusting plate heat exchanger according to claim 5, characterized in that: The contact surfaces of two adjacent flared structures (6.4) and the matching surfaces between the flared structure and the frame groove (1.1) are fixed by brazing.

7. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The upper partition plate (2), the middle partition plate A (3) and the heat dissipation core (6) therebetween are fixed by brazing, and the middle partition plate B (4), the lower partition plate (5) and the heat dissipation core (6) therebetween are also fixed by brazing.

8. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The ends of the upper partition plate (2) and the lower partition plate (5) are inserted into the end plate (1) and fixed by brazing.

9. The high temperature resistant self-adjusting plate heat exchanger according to claim 1, characterized in that: The pull rods (7.4) between the upper partition (2) and the middle partition A (3) and between the middle partition B (4) and the lower partition (5) are all sleeved with positioning tubes (9), which are used to position the distance between the upper U-shaped rib (7.1) and the transition beam (7.2), and between the transition beam (7.2) and the lower U-shaped rib (7.3), respectively.

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