A water fin tube core assembly structure for a cooler

Abstract

The utility model discloses a cooler water fin tube core assembly structure, which is provided with a tube shell, a left tube sheet, a right tube sheet, a tube core assembly, an upper water fin and a lower water fin; one end of the tube shell is connected to the left tube sheet, and the other end of the tube shell is connected to the right tube sheet; the tube core assembly is inside the tube shell, one end of the tube core assembly is connected to the left tube sheet, and the other end of the tube core assembly is connected to the right tube sheet; the outer parts of the upper water fin and the lower water fin are both wrapped with a solder strip, the upper water fin is filled between the upper part of the tube core assembly and the inner wall of the tube shell, and the lower water fin is filled between the lower part of the tube core assembly and the inner wall of the tube shell; the upper water fin, the lower water fin and the tube shell are welded to form a whole through the solder strip. The utility model improves the strength of the cooler, avoids the defects that the cooler is prone to leakage and cannot meet the sealing conditions when encountering bad working conditions, and ensures the product performance of the cooler under bad working conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of EGR coolers, and in particular relates to a water fin tube core assembly structure of a cooler. Background Art

[0002] The EGR cooler is a water-cooled heat exchanger whose main function is to cool part of the exhaust gas returned to the engine cylinder and reduce the nitrogen oxides (NO X ) content and return part of the exhaust gas to the engine cylinder (i.e. exhaust gas recirculation technology). The exhaust gas temperature is as high as 600°C and must be cooled down before entering the engine intake system.

[0003] At present, in the EGR cooling system, when the cooler tube shell and tube core are assembled, the tube shell and the flat tube fin assembly are brazed together only by the tube sheet in the tube core, which has low strength. When encountering severe working conditions, it is easy to desolder due to vibration, which leads to exhaust gas leakage and cannot meet the sealing conditions. How to improve the structural strength and sealing of the cooler has practical application significance. Utility Model Content

[0004] To this end, the utility model provides a cooler water fin tube core assembly structure to solve the problems of poor stability and easy desoldering resulting in poor sealing of the traditional structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooler water fin tube core assembly structure, including a tube shell, a left tube plate, a right tube plate, a tube core assembly, an upper water fin and a lower water fin;

[0006] One end of the tube shell is connected to the left tube sheet, and the other end of the tube shell is connected to the right tube sheet; the tube core assembly is located inside the tube shell, one end of the tube core assembly is connected to the left tube sheet, and the other end of the tube core assembly is connected to the right tube sheet;

[0007] The upper water fin and the lower water fin are both wrapped with solder strips, the upper water fin is filled between the upper part of the tube core assembly and the inner wall of the tube shell, and the lower water fin is filled between the lower part of the tube core assembly and the inner wall of the tube shell;

[0008] The upper water fin, the lower water fin and the tube shell are welded together by the solder strip to form a whole.

[0009] As a preferred solution for the cooler water fin tube core assembly structure, the left tube plate is formed with a left plug hole, and the right tube plate is formed with a right plug hole; the tube core assembly includes a plurality of flat tubes arranged vertically, one end of the flat tube is connected to the left plug hole, and the other end of the flat tube is connected to the right plug hole.

[0010] As a preferred solution for the cooler water fin tube core assembly structure, it also includes a left deflector, a middle deflector and a right deflector; the left deflector is connected to the left ends of several flat tubes arranged vertically, the middle deflector is connected to the middle positions of several flat tubes arranged vertically, and the right deflector is connected to the right ends of several flat tubes arranged vertically.

[0011] As a preferred solution for the cooler water fin tube core assembly structure, the left deflector, the middle deflector and the right deflector are all comb-shaped, and the opening directions of the left deflector and the right deflector are opposite to the opening direction of the middle deflector.

[0012] As a preferred solution for the cooler water fin tube core assembly structure, the upper part of the upper water fin wrapped with solder tape fits the inner wall of the tube shell, and the lower part of the upper water fin wrapped with solder tape fits the upper part of the tube core assembly.

[0013] As a preferred solution for the cooler water fin tube core assembly structure, the lower part of the lower water fin wrapped with solder tape fits the inner wall of the tube shell, and the upper part of the lower water fin wrapped with solder tape fits the lower part of the tube core assembly.

[0014] As a preferred solution for the cooler water fin tube core assembly structure, the length of the upper water fin is not greater than the length of the tube core assembly, and the width of the upper water fin is equal to the width of the tube core assembly.

[0015] As a preferred solution of the cooler water fin tube core assembly structure, the length of the lower water fin is not greater than the length of the tube core assembly, and the width of the lower water fin is equal to the width of the tube core assembly.

[0016] The utility model has the following advantages: a tube shell, a left tube sheet, a right tube sheet, a tube core assembly, an upper water fin and a lower water fin are provided; one end of the tube shell is connected to the left tube sheet, and the other end of the tube shell is connected to the right tube sheet; the tube core assembly is inside the tube shell, one end of the tube core assembly is connected to the left tube sheet, and the other end of the tube core assembly is connected to the right tube sheet; the outer parts of the upper water fin and the lower water fin are both wrapped with a solder strip, the upper water fin is filled between the upper part of the tube core assembly and the inner wall of the tube shell, and the lower water fin is filled between the lower part of the tube core assembly and the inner wall of the tube shell; the upper water fin, the lower water fin and the tube shell are welded to form a whole through the solder strip. The utility model improves the strength of the cooler, avoids the defects that the cooler is prone to leakage and cannot meet the sealing conditions when encountering harsh working conditions, and ensures the product performance of the cooler under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 It is a three-dimensional schematic diagram of the assembly structure of the water fin tube core of the cooler provided in the embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the water fin tube core assembly of the cooler provided in the embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the coordination of the upper water fin, the lower water fin and the tube shell of the water fin tube core assembly structure of the cooler provided in the embodiment of the utility model.

[0022] In the figure, 1, tube shell; 2, left tube sheet; 3, right tube sheet; 4, tube core assembly; 5, upper water fin; 6, lower water fin; 7, left plug hole; 8, right plug hole; 9, flat tube; 10, left deflector; 11, middle deflector; 12, right deflector. DETAILED DESCRIPTION

[0023] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part 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 creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the utility model provides a cooler water fin tube core assembly structure, including a tube shell 1, a left tube sheet 2, a right tube sheet 3, a tube core assembly 4, an upper water fin 5 and a lower water fin 6;

[0025] Among them, one end of the tube shell 1 is connected to the left tube sheet 2, and the other end of the tube shell 1 is connected to the right tube sheet 3; the tube core assembly 4 is inside the tube shell 1, one end of the tube core assembly 4 is connected to the left tube sheet 2, and the other end of the tube core assembly 4 is connected to the right tube sheet 3;

[0026] The upper water fin 5 and the lower water fin 6 are both wrapped with solder strips, the upper water fin 5 is filled between the upper part of the tube core assembly 4 and the inner wall of the tube shell 1, and the lower water fin 6 is filled between the lower part of the tube core assembly 4 and the inner wall of the tube shell 1;

[0027] The upper water fin 5, the lower water fin 6 and the tube shell 1 are welded together by solder strips to form a whole.

[0028] In this embodiment, the left tube plate 2 is formed with a left plug hole 7, and the right tube plate 3 is formed with a right plug hole 8; the tube core assembly 4 includes a plurality of flat tubes 9 arranged up and down, one end of the flat tube 9 is connected to the left plug hole 7, and the other end of the flat tube 9 is connected to the right plug hole 8.

[0029] Specifically, the left end of the flat tube 9 of the tube core assembly 4 is inserted into the left plug hole 7, and the right end of the flat tube 9 of the tube core assembly 4 is inserted into the right plug hole 8, thereby fixing the left end of the tube core assembly 4 by the left tube plate 2 and fixing the right end of the tube core assembly 4 by the right tube plate 3.

[0030] In this embodiment, it also includes a left deflector 10, a middle deflector 11 and a right deflector 12; the left deflector 10 is connected to the left end of a plurality of flat tubes 9 arranged vertically, the middle deflector 11 is connected to the middle position of a plurality of flat tubes 9 arranged vertically, and the right deflector is connected to the right end of a plurality of flat tubes 9 arranged vertically; the left deflector 10, the middle deflector 11 and the right deflector 12 are all comb-shaped, and the opening directions of the left deflector 10 and the right deflector 12 are opposite to the opening direction of the middle deflector 11.

[0031] Specifically, the left baffle 10, the middle baffle 11 and the right baffle 12 not only guide the fluid in the tube shell 1 to repeatedly change direction to flow in a cross flow or other forms of flow, but also adjust the spacing between the left baffle 10, the middle baffle 11 and the right baffle 12 to obtain a suitable flow rate and improve the heat transfer efficiency. In addition, the left baffle 10, the middle baffle 11 and the right baffle 12 can also support the flat tube 9 of the tube core assembly 4.

[0032] In this embodiment, the upper part of the upper water fin 5 wrapped with the solder tape fits the inner wall of the tube shell 1, and the lower part of the upper water fin 5 wrapped with the solder tape fits the upper part of the tube core assembly 4; the lower part of the lower water fin 6 wrapped with the solder tape fits the inner wall of the tube shell 1, and the upper part of the lower water fin 6 wrapped with the solder tape fits the lower part of the tube core assembly 4.

[0033] Specifically, the upper water fin 5 and the lower water fin 6 are wrapped with a brazing material belt, and then closely attached to the tube core assembly 4 at both ends, and finally inserted into the tube shell 1, and brazed after applying the brazing material. The upper water fin 5 and the lower water fin 6 can be used to braze the tube shell 1 and the tube core assembly 4 into a whole, thereby improving the welding strength and ensuring the product performance of the cooler under harsh working conditions.

[0034] In this embodiment, the length of the upper water fin 5 is not greater than the length of the tube core assembly 4, and the width of the upper water fin 5 is equal to the width of the tube core assembly 4; the length of the lower water fin 6 is not greater than the length of the tube core assembly 4, and the width of the lower water fin 6 is equal to the width of the tube core assembly 4. The upper water fin 5 and the lower water fin 6 have the same width as the tube core assembly 4 in the width direction, which can ensure the sealing of the upper water fin 5 and the lower water fin 6 in the width direction after being welded by the solder strip.

[0035] In this embodiment, the assembly process of the cooler water fin tube core assembly structure is as follows:

[0036] (1) Wrap the upper water fin 5 and the lower water fin 6 with a solder tape;

[0037] (2) The upper water fin 5 and the lower water fin 6 are respectively close to the tube core at both ends;

[0038] (3) Insert the upper water fin 5, the lower water fin 6 and the tube core into the tube shell 1;

[0039] (4) The ends of the tube core assembly 4 are assembled with the left tube sheet 2 and the right tube sheet 3;

[0040] (5) Expanding the left tube sheet 2 and the right tube sheet 3;

[0041] (6) Apply solder;

[0042] (7) Brazing: welding the tube shell 1 and the tube core assembly 4 into one body.

[0043] The verification process is as follows:

[0044] Boundary conditions: The same boundary numerical model is used, both with EGR valve and exhaust pipe parts. Table 1 is the second-order modal vibration shape distribution before optimization, and Table 2 is the second-order modal vibration shape distribution after optimization:

[0045] Table 1 Second-order modal vibration shape distribution before optimization

[0046] Modal Order Resonance frequency 1 225 2 325 3 372 4 382 5 391 6 403

[0047] Table 2 Second-order modal vibration mode distribution before optimization

[0048] Modal Order Resonance frequency 1 225 2 315 3 372 4 474 5 573 6 568

[0049] In the schemes before and after optimization, the 1 / 2 / 3 order resonance frequencies are basically the same, and the 4 / 5 / 6 order resonance frequencies are significantly increased after optimization. It can be seen that the resonance frequencies of the optimized scheme have no significant difference in low modal orders, but are significantly improved in high modal orders. The above verification process proves that the assembly of the upper water fin 5, the lower water fin 6 and the tube core assembly 4 can improve the welding strength and ensure the product performance requirements of the cooler under harsh working conditions.

[0050] In summary, the utility model is provided with a tube shell 1, a left tube sheet 2, a right tube sheet 3, a tube core assembly 4, an upper water fin 5 and a lower water fin 6; one end of the tube shell 1 is connected to the left tube sheet 2, and the other end of the tube shell 1 is connected to the right tube sheet 3; the tube core assembly 4 is located inside the tube shell 1, one end of the tube core assembly 4 is connected to the left tube sheet 2, and the other end of the tube core assembly 4 is connected to the right tube sheet 3; the outer parts of the upper water fin 5 and the lower water fin 6 are both wrapped with a solder strip, the upper water fin 5 is filled between the upper part of the tube core assembly 4 and the inner wall of the tube shell 1, and the lower water fin 6 is filled between the lower part of the tube core assembly 4 and the inner wall of the tube shell 1; the upper water fin 5, the lower water fin 6 and the tube shell 1 are welded to form a whole through the solder strip. The left end of the flat tube 9 of the tube core assembly 4 is inserted into the left plug hole 7, and the right end of the flat tube 9 of the tube core assembly 4 is inserted into the right plug hole 8, so that the left tube sheet 2 fixes the left end of the tube core assembly 4, and the right tube sheet 3 fixes the right end of the tube core assembly 4. The left baffle 10, the middle baffle 11 and the right baffle 12 not only guide the fluid in the tube shell 1 to repeatedly change direction to make a cross flow or other forms of flow, but also adjust the spacing between the left baffle 10, the middle baffle 11 and the right baffle 12 to obtain a suitable flow rate and improve the heat transfer efficiency. In addition, the left baffle 10, the middle baffle 11 and the right baffle 12 can also support the flat tube 9 of the tube core assembly 4. The upper water fin 5 and the lower water fin 6 are wrapped with a brazing tape, and then respectively attached to the tube core assembly 4 at both ends, and finally inserted into the tube shell 1, and brazed after applying the brazing material. The upper water fin 5 and the lower water fin 6 can be used to braze the tube shell 1 and the tube core assembly 4 into a whole, thereby improving the welding strength and ensuring the product performance of the cooler under harsh working conditions. The upper water fin 5 and the lower water fin 6 have the same width as the tube core assembly 4 in the width direction, which can ensure the sealing of the upper water fin 5 and the lower water fin 6 in the width direction after being welded by the brazing tape. The utility model improves the strength of the cooler, avoids the defect that the cooler is prone to leakage and cannot meet the sealing conditions when encountering harsh working conditions, and ensures the product performance of the cooler under harsh working conditions.

[0051] The above is a relatively specific and detailed description of the utility model through general description and specific embodiments. It should be understood that based on the technical concept of the utility model, some conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the utility model, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the utility model.

Claims

1. A cooler water fin tube core assembly structure, characterized in that: It comprises a tube shell (1), a left tube sheet (2), a right tube sheet (3), a tube core assembly (4), an upper water fin (5) and a lower water fin (6); One end of the tube shell (1) is connected to the left tube sheet (2), and the other end of the tube shell (1) is connected to the right tube sheet (3); the tube core assembly (4) is located inside the tube shell (1), one end of the tube core assembly (4) is connected to the left tube sheet (2), and the other end of the tube core assembly (4) is connected to the right tube sheet (3); The upper water fin (5) and the lower water fin (6) are both wrapped with solder strips on the outside, the upper water fin (5) is filled between the upper part of the tube core assembly (4) and the inner wall of the tube shell (1), and the lower water fin (6) is filled between the lower part of the tube core assembly (4) and the inner wall of the tube shell (1); The upper water fin (5), the lower water fin (6) and the tube shell (1) are welded together by the solder strip to form a whole.

2. A cooler water fin tube core assembly structure according to claim 1, characterized in that: The left tube plate (2) is formed with a left plug hole (7), and the right tube plate (3) is formed with a right plug hole (8); the tube core assembly (4) comprises a plurality of flat tubes (9) arranged vertically, one end of the flat tube (9) is connected to the left plug hole (7), and the other end of the flat tube (9) is connected to the right plug hole (8).

3. A cooler water fin tube core assembly structure according to claim 2, characterized in that: It also comprises a left deflector (10), a middle deflector (11) and a right deflector (12); the left deflector (10) is connected to the left ends of a plurality of the flat tubes (9) arranged vertically, the middle deflector (11) is connected to the middle positions of the plurality of the flat tubes (9) arranged vertically, and the right deflector (12) is connected to the right ends of the plurality of the flat tubes (9) arranged vertically.

4. A cooler water fin tube core assembly structure according to claim 3, characterized in that: The left deflector (10), the middle deflector (11), and the right deflector (12) are all comb-shaped, and the opening directions of the left deflector (10) and the right deflector (12) are opposite to the opening direction of the middle deflector (11).

5. The water fin tube core assembly structure of a cooler according to claim 1, characterized in that: The upper part of the water-up fin (5) wrapped with the solder strip fits the inner wall of the tube shell (1), and the lower part of the water-up fin (5) wrapped with the solder strip fits the upper part of the tube core assembly (4).

6. The water fin tube core assembly structure of a cooler according to claim 1, characterized in that: The lower part of the water-introducing fin (6) wrapped with the solder strip fits the inner wall of the tube shell (1), and the upper part of the water-introducing fin (6) wrapped with the solder strip fits the lower part of the tube core assembly (4).

7. The cooler water fin tube core assembly structure according to claim 1, characterized in that: The length of the water-upstream fin (5) is not greater than the length of the tube core assembly (4), and the width of the water-upstream fin (5) is equal to the width of the tube core assembly (4).

8. The cooler water fin tube core assembly structure according to claim 1, characterized in that: The length of the launching fin (6) is not greater than the length of the tube core assembly (4), and the width of the launching fin (6) is equal to the width of the tube core assembly (4).

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