CN216554147U - Heavy exhaust gas recirculation cooler - Google Patents
Heavy exhaust gas recirculation cooler Download PDFInfo
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- CN216554147U CN216554147U CN202123187201.1U CN202123187201U CN216554147U CN 216554147 U CN216554147 U CN 216554147U CN 202123187201 U CN202123187201 U CN 202123187201U CN 216554147 U CN216554147 U CN 216554147U
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- diffuser
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Abstract
A heavy-duty exhaust gas recirculation cooler, the heat exchange core includes diffusion piece, tube sheet and heat exchange tube; the diffusion piece is connected with the heat exchange tube through the tube plate, and a corrugated tube is arranged between the diffusion piece and the barrier ring; one side of the diffusion piece, which is close to the corrugated pipe, is provided with a limiting step; a damping component is arranged between the limiting step and the stop ring; the damping component comprises a first thin plate layer and a second thin plate layer, one end of the first thin plate layer is in contact with the blocking ring, and the other end of the first thin plate layer is in contact with the limiting step; the second sheet layer is attached to the outside of the first sheet layer. Or the damping component is designed into a sheet spring main body; a sleeve joint is formed in the center of the flat spring main body, and the flat spring main body is sleeved on the periphery of the diffusion piece through the sleeve joint; the edge of the leaf spring main body is provided with a flanging which is abutted against the inner wall of the shell. The damping assembly does work to overcome resistance in the vibration process, consumes energy brought by initial vibration, enables the amplitude to be attenuated continuously, and improves the overall reliability.
Description
Technical Field
The utility model relates to a heavy exhaust gas recirculation cooler with a damping structure, and belongs to the technical field of engines.
Background
The exhaust gas recirculation cooling system can reduce NO of automobile exhaustxAnd discharging, namely reintroducing a small amount of exhaust gas into the intake valve at a higher speed of the automobile, thereby realizing exhaust gas recirculation. Temperature of exhaust gas NOxEmission, NO to engine the lower the temperature of the exhaust gasxThe better the inhibition. The egr cooler can reduce the temperature of the exhaust gas entering the cylinder, which is beneficial for the thermal load of the engine and can reduce the engine temperature. With the implementation of relevant environmental protection policies, air quality improvement has obvious effects. Nevertheless, the current situation is not optimistic, especially in areas where PM2.5 is frequent and more severe, and there is a far way away from environmental targets.
At the present stage, the key points of emission reduction and control in the fourteen-five planning are heavy diesel engines, and exhaust gas recirculation coolers applied to the heavy diesel engines are high in heat exchange performance requirements, large in size, large in vibration, large in expansion and contraction stress and high in reliability requirements; it is a common practice to compensate for thermal expansion and contraction deformation using a bellows, which has a small wall thickness and is excellent in compensation for deformation and poor in vibration resistance, resulting in a reduction in reliability of the entire egr cooler. Therefore, a heavy duty egr cooler solution capable of improving the overall reliability is required, and the applicant has made research and development on a series of products.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a heavy-duty exhaust gas recirculation cooler, which improves the vibration resistance of a corrugated pipe and a heat exchange core body by reducing the amplitude and improves the overall reliability of the exhaust gas recirculation cooler.
In order to achieve the above purpose, the utility model provides the following technical scheme: a heavy-duty exhaust gas recirculation cooler comprises a shell and a heat exchange core body, wherein the heat exchange core body is arranged in the shell, a stop ring is formed at the air inlet end of the shell, and the heat exchange core body comprises a diffusion piece, a tube plate and a heat exchange tube; the diffusion piece is connected with the heat exchange tube through the tube plate, and a corrugated tube is arranged between the diffusion piece and the barrier ring; one side of the diffusion piece, which is close to the corrugated pipe, is provided with a limiting step; a damping component is arranged between the limiting step and the stop ring; the damping assembly comprises a first thin plate layer and a second thin plate layer, one end of the first thin plate layer is contacted with the barrier ring, and the other end of the first thin plate layer is contacted with the limiting step; the second sheet layer is attached to an outer side of the first sheet layer.
In a preferred embodiment of the heavy duty egr cooler, the first sheet layer is bent toward one side of the housing, and the second sheet layer is bent toward one side of the housing.
As a preferable aspect of the heavy egr cooler, the first sheet layer has a length greater than that of the second sheet layer, and the first sheet layer has a degree of bending smaller than that of the second sheet layer.
As a preferred solution for a heavy duty egr cooler, the first sheet layer and the second sheet layer have a fitting clearance formed therebetween.
As a preferable scheme of the heavy-duty exhaust gas recirculation cooler, four groups of damping assemblies are provided; four groups of damping assemblies are distributed on the periphery of the corrugated pipe at equal intervals.
As a preferable scheme of the heavy-duty egr cooler, the heat exchange tube is conducted inside the diffuser, and an inner diameter of the diffuser at an end close to the bellows is smaller than an inner diameter of the diffuser at an end close to the heat exchange tube.
The utility model also provides a heavy-duty exhaust gas recirculation cooler, which comprises a shell and a heat exchange core body, wherein the heat exchange core body is arranged in the shell, a blocking ring is formed at the air inlet end of the shell, and the heat exchange core body comprises a diffusion piece, a tube plate and a heat exchange tube; the diffusion piece is connected with the heat exchange tube through the tube plate, and a corrugated tube is arranged between the diffusion piece and the barrier ring; a damping component is arranged on the periphery of the diffusion piece; the damping assembly includes a leaf spring body; a sleeve joint is formed in the center of the flat spring main body, and the flat spring main body is sleeved on the periphery of the diffusion piece through the sleeve joint; and a flange is formed at the edge of the leaf spring main body and is abutted against the inner wall of the shell.
As another preferable scheme of the heavy-duty exhaust gas recirculation cooler, a buffer piece is arranged between the flanging and the diffusion piece, and the buffer piece is arched.
The utility model has the following advantages: the heat exchange device is provided with a shell and a heat exchange core body, wherein the heat exchange core body is arranged in the shell, a stop ring is formed at the air inlet end of the shell, and the heat exchange core body comprises a diffusion piece, a tube plate and a heat exchange tube; the diffusion piece is connected with the heat exchange tube through a tube plate, and a corrugated tube is arranged between the diffusion piece and the barrier ring; one side of the diffusion piece close to the corrugated pipe is provided with a limiting step; a damping component is arranged between the limiting step and the stop ring; the damping component comprises a first thin plate layer and a second thin plate layer, one end of the first thin plate layer is in contact with the blocking ring, and the other end of the first thin plate layer is in contact with the limiting step; the second sheet layer is attached to the outside of the first sheet layer. Or the damping component is designed into a sheet spring main body; a sleeve joint is formed in the center of the flat spring main body, and the flat spring main body is sleeved on the periphery of the diffusion piece through the sleeve joint; the edge of the leaf spring main body is provided with a flanging which is abutted against the inner wall of the shell. In the utility model, in consideration of improving the reliability of the exhaust gas recirculation cooler, the damping component does work to overcome resistance in the vibration process, and the energy brought by initial vibration is consumed, so that the amplitude is attenuated continuously; the vibration resistance of the corrugated pipe and the heat exchange core body is improved by reducing the amplitude, and the integral reliability of the exhaust gas recirculation cooler is improved; the exhaust gas recirculation system is suitable for exhaust gas recirculation in an engine system, and is particularly suitable for medium and heavy diesel engines and natural gas engines.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
FIG. 1 is a schematic diagram of a heavy duty EGR cooler provided in example 1 of the present invention;
FIG. 2 is a schematic view of a damping assembly employed in a heavy duty EGR cooler provided in embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of a heavy duty EGR cooler provided in example 2 of the present invention;
fig. 4 is a schematic view of a damping assembly employed in a heavy duty egr cooler provided in embodiment 2 of this invention.
In the figure, 1, a housing; 2. a heat exchange core body; 3. a blocking ring; 4. a diffuser; 5. a tube sheet; 6. a heat exchange pipe; 7. a limiting step; 8. a damping assembly; 9. a first sheet layer; 10. a second sheet layer; 11. fitting gaps; 12. a leaf spring body; 13. a socket; 14. flanging; 15. a buffer member; 16. a bellows.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, embodiment 1 of the present invention provides a heavy duty exhaust gas recirculation cooler, including a shell 1 and a heat exchange core 2, where the heat exchange core 2 is disposed inside the shell 1, an air inlet end of the shell 1 is formed with a blocking ring 3, and the heat exchange core 2 includes a diffuser 4, a tube sheet 5 and a heat exchange tube 6; the diffuser 4 is connected with the heat exchange tube 6 through the tube plate 5, and a corrugated tube 16 is arranged between the diffuser 4 and the barrier ring 3; a limiting step 7 is arranged on one side of the diffusion piece 4 close to the corrugated pipe 16; a damping component 8 is arranged between the limiting step 7 and the stop ring 3; the damping component 8 comprises a first thin plate layer 9 and a second thin plate layer 10, one end of the first thin plate layer 9 is contacted with the barrier ring 3, and the other end of the first thin plate layer 9 is contacted with the limiting step 7; the second sheet layer 10 is attached to the outside of the first sheet layer 9.
In the present embodiment, the first thin plate layer 9 is bent toward one side of the housing 1, and the second thin plate layer 10 is bent toward one side of the housing 1. The length of the first sheet layer 9 is greater than the length of the second sheet layer 10, and the degree of bending of the first sheet layer 9 is less than the degree of bending of the second sheet layer 10. A fitting gap 11 is formed between the first sheet layer 9 and the second sheet layer 10.
Specifically, since the first sheet layer 9 and the second sheet layer 10 both have a certain degree of bending, and the second sheet layer 10 on the outside has a large degree of bending, and the first sheet layer 9 on the inside has a small degree of bending, the first sheet layer 9 and the second sheet layer 10 form the fitting gap 11.
The amplitude of the heavy-duty cooler is large, during vibration, the damping component 8 is limited by the shell 1, the second thin plate layer 10 at the outer side is deformed firstly, and after the outer second thin plate layer 10 is deformed and attached to the inner first thin plate layer 9, the outer second thin plate layer and the first thin plate layer 9 are integrated into a whole, and deformation begins to occur synchronously; the first thin plate layer 9 and the second thin plate layer 10 can generate damping effect in the deformation friction process, the amplitude of the structural member is reduced, and the vibration of the heat exchange core body 2 is relieved, so that the overall reliability of the cooler is improved.
In this embodiment, four sets of damping assemblies 8 are provided; four groups of the damping assemblies 8 are distributed at equal intervals on the periphery of the corrugated pipe 16.
Specifically, four groups of damping assemblies 8 are arranged outside the corrugated pipe 16, and the damping assemblies 8 are designed symmetrically, so that the damping assemblies can buffer stress deformation in all directions in the vibration process of the engine.
In this embodiment, the heat exchange tube 6 is conducted through the inside of the diffuser 4, and the inner diameter of the end of the diffuser 4 close to the corrugated tube 16 is smaller than the inner diameter of the end of the diffuser 4 close to the heat exchange tube 6. The diffusion piece 4 belongs to the prior art, the diffusion piece 4 is located at the air inlet end of the exhaust gas recirculation cooler, and the diffusion piece 4 is a truncated cone-shaped space inside, so that the exhaust gas diffusion effect can be achieved, and the exhaust gas enters the heat exchange tube 6 for heat exchange.
In summary, the utility model is provided with a shell 1 and a heat exchange core 2, wherein the heat exchange core 2 is arranged inside the shell 1, a blocking ring 3 is formed at the air inlet end of the shell 1, and the heat exchange core 2 comprises a diffusion piece 4, a tube plate 5 and a heat exchange tube 6; the diffusion piece 4 is connected with the heat exchange tube 6 through a tube plate 5, and a corrugated tube 16 is arranged between the diffusion piece 4 and the barrier ring 3; one side of the diffusion piece 4 close to the corrugated pipe 16 is provided with a limiting step 7; a damping component 8 is arranged between the limiting step 7 and the stop ring 3; the damping component 8 comprises a first thin plate layer 9 and a second thin plate layer 10, one end of the first thin plate layer 9 is contacted with the barrier ring 3, and the other end of the first thin plate layer 9 is contacted with the limiting step 7; the second sheet layer 10 is attached to the outside of the first sheet layer 9. The amplitude of the heavy-duty cooler is large, during vibration, the damping component 8 is limited by the shell 1, the second thin plate layer 10 at the outer side is deformed firstly, and after the outer second thin plate layer 10 is deformed and attached to the inner first thin plate layer 9, the outer second thin plate layer and the first thin plate layer 9 are integrated into a whole, and deformation begins to occur synchronously; the first thin plate layer 9 and the second thin plate layer 10 can generate damping effect in the deformation friction process, the amplitude of the structural member is reduced, and the vibration of the heat exchange core body 2 is relieved, so that the overall reliability of the cooler is improved. In the utility model, in view of improving the reliability of the exhaust gas recirculation cooler, the damping component 8 does work to overcome resistance in the vibration process, and consumes energy brought by initial vibration, so that the amplitude is attenuated continuously; the vibration resistance of the corrugated pipe 16 and the heat exchange core 2 is improved by reducing the amplitude, and the integral reliability of the exhaust gas recirculation cooler is improved; the exhaust gas recirculation system is suitable for exhaust gas recirculation in an engine system, and is particularly suitable for medium and heavy diesel engines and natural gas engines.
Example 2
Referring to fig. 3 and 4, embodiment 2 of the present invention provides a heavy duty exhaust gas recirculation cooler, including a shell 1 and a heat exchange core 2, where the heat exchange core 2 is disposed inside the shell 1, a blocking ring 3 is formed at an air inlet end of the shell 1, and the heat exchange core 2 includes a diffuser 4, a tube sheet 5 and a heat exchange tube 6; the diffuser 4 is connected with the heat exchange tube 6 through the tube plate 5, and a corrugated tube 16 is arranged between the diffuser 4 and the barrier ring 3; the periphery of the diffusion piece 4 is provided with a damping component 8; the damping assembly 8 comprises a leaf spring body 12; a sleeve joint 13 is formed in the center of the flat spring main body 12, and the flat spring main body 12 is sleeved on the periphery of the diffusion piece 4 through the sleeve joint 13; the edge of the leaf spring main body 12 is formed with a flange 14, and the flange 14 is abutted against the inner wall of the shell 1.
Specifically, by replacing the first thin plate layer 9 and the second thin plate layer 10 in embodiment 1 with the main body 12 of the plate spring, the main body 12 of the plate spring is placed on the side of the diffusion member 4 and is sleeved with the diffusion member 4, the main body 12 of the plate spring is provided with the flanges 14 in the circumferential direction, the flanges 14 abut against the housing 1, the end of the heat exchange core 2 is supported by the flanges 14, and meanwhile, the main body 12 of the plate spring can also play a role in increasing the rigidity of the heat exchange core 2, and as a damping structure, the amplitude of the heat exchange core 2 is reduced.
In this embodiment, a buffer member 15 is disposed between the flange 14 and the diffuser element 4, and the buffer member 15 is arched.
Specifically, by adding the arched buffer 15, the buffer 15 is used to protect the flat spring body 12 from excessive deformation, and the reliability of the entire damping assembly can be further improved.
In summary, the utility model is provided with a shell 1 and a heat exchange core 2, wherein the heat exchange core 2 is arranged inside the shell 1, a blocking ring 3 is formed at the air inlet end of the shell 1, and the heat exchange core 2 comprises a diffusion piece 4, a tube plate 5 and a heat exchange tube 6; the diffusion piece 4 is connected with the heat exchange tube 6 through a tube plate 5, and a corrugated tube 16 is arranged between the diffusion piece 4 and the barrier ring 3; the periphery of the diffusion piece 4 is provided with a damping component 8; the damping assembly 8 includes a leaf spring body 12; a sleeve joint 13 is formed in the center of the flat spring main body 12, and the flat spring main body 12 is sleeved on the periphery of the diffusion piece 4 through the sleeve joint 13; the edge of the leaf spring body 12 is formed with a flange 14, and the flange 14 abuts against the inner wall of the housing 1. The end part of the heat exchange core body 2 is supported by the turned edge 14, and meanwhile, the plate spring main body 12 can also play a role in increasing the rigidity of the heat exchange core body 2 and serve as a damping structure to reduce the amplitude of the heat exchange core body 2. By adding the arched buffer 15, the buffer 15 is used to protect the flat spring body 12 from excessive deformation, and the reliability of the entire damping assembly can be further improved. In the utility model, in view of improving the reliability of the exhaust gas recirculation cooler, the damping component 8 does work to overcome resistance in the vibration process, and consumes energy brought by initial vibration, so that the amplitude is attenuated continuously; the vibration resistance of the corrugated pipe 16 and the heat exchange core 2 is improved by reducing the amplitude, and the integral reliability of the exhaust gas recirculation cooler is improved; the exhaust gas recirculation system is suitable for exhaust gas recirculation in an engine system, and is particularly suitable for medium and heavy diesel engines and natural gas engines.
Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (8)
1. A heavy-duty exhaust gas recirculation cooler comprises a shell (1) and a heat exchange core body (2), wherein the heat exchange core body (2) is arranged inside the shell (1), a blocking ring (3) is formed at the air inlet end of the shell (1), and the heat exchange core body (2) comprises a diffuser (4), a tube plate (5) and a heat exchange tube (6); the diffuser (4) is connected with the heat exchange tube (6) through the tube plate (5), and a corrugated tube (16) is arranged between the diffuser (4) and the barrier ring (3); a limiting step (7) is arranged on one side, close to the corrugated pipe (16), of the diffusion piece (4); the damping device is characterized in that a damping component (8) is arranged between the limiting step (7) and the stop ring (3); the damping component (8) comprises a first thin plate layer (9) and a second thin plate layer (10), one end of the first thin plate layer (9) is contacted with the blocking ring (3), and the other end of the first thin plate layer (9) is contacted with the limiting step (7); the second sheet layer (10) is connected to the outside of the first sheet layer (9).
2. A heavy egr cooler according to claim 1 characterized in that the first sheet layer (9) is bent to one side of the housing (1) and the second sheet layer (10) is bent to one side of the housing (1).
3. A heavy egr cooler according to claim 2 characterized in that the length of the first sheet layer (9) is greater than the length of the second sheet layer (10), and that the degree of bending of the first sheet layer (9) is less than the degree of bending of the second sheet layer (10).
4. A heavy duty egr cooler according to claim 3 wherein a mating gap (11) is formed between the first sheet layer (9) and the second sheet layer (10).
5. A heavy duty exhaust gas recirculation cooler according to claim 4, characterized in that said damping assembly (8) is provided in four groups; four groups of damping assemblies (8) are distributed on the periphery of the corrugated pipe (16) at equal intervals.
6. A heavy duty egr cooler according to claim 1 wherein the interior of the diffuser (4) conducts the heat exchange tubes (6), and the diffuser (4) has a smaller inner diameter at the end adjacent to the bellows (16) than the diffuser (4) at the end adjacent to the heat exchange tubes (6).
7. A heavy-duty exhaust gas recirculation cooler comprises a shell (1) and a heat exchange core body (2), wherein the heat exchange core body (2) is arranged inside the shell (1), a blocking ring (3) is formed at the air inlet end of the shell (1), and the heat exchange core body (2) comprises a diffuser (4), a tube plate (5) and a heat exchange tube (6); the diffuser (4) is connected with the heat exchange tube (6) through the tube plate (5), and a corrugated tube (16) is arranged between the diffuser (4) and the barrier ring (3); characterized in that a damping component (8) is arranged at the periphery of the diffusion piece (4); the damping assembly (8) comprises a leaf spring body (12); a sleeve joint (13) is formed in the center of the flat spring main body (12), and the flat spring main body (12) is sleeved on the periphery of the diffusion piece (4) through the sleeve joint (13); a flanging (14) is formed at the edge of the leaf spring main body (12), and the flanging (14) is abutted against the inner wall of the shell (1).
8. A heavy duty EGR cooler according to claim 7 wherein a buffer (15) is provided between the cuff (14) and the diffuser element (4), said buffer (15) being arcuate in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187201.1U CN216554147U (en) | 2021-12-17 | 2021-12-17 | Heavy exhaust gas recirculation cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187201.1U CN216554147U (en) | 2021-12-17 | 2021-12-17 | Heavy exhaust gas recirculation cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216554147U true CN216554147U (en) | 2022-05-17 |
Family
ID=81543669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123187201.1U Active CN216554147U (en) | 2021-12-17 | 2021-12-17 | Heavy exhaust gas recirculation cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216554147U (en) |
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2021
- 2021-12-17 CN CN202123187201.1U patent/CN216554147U/en active Active
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