A structure capable of improving durability and reliability of EGR / C

Abstract

The utility model provides a can improve EGR / C durability reliability's structure, include: the side ventilation flange one side median has the air inlet, and the water side ventilation flane other side is the air outlet square groove, and the air outlet square groove is linked with the air inlet, a section cooling group is set up in the water side ventilation flane in the air outlet groove one side through bolt connection, two section cooling groups set up in the section cooling group far away from the water side ventilation flane, and the fixed plate card sets between the section cooling group and two section cooling groups, the utility model discloses water side ventilation flane, a section cooling group, two section cooling groups and fixed plate, beforehand the high temperature gas is passed into the section cooling group and cools down, then enters two section cooling groups and carries out heat exchange, and the temperature of fixed plate surface of air inlet position reduces in two rounds heat exchange, and the reliability of EGR has been improved.

Description

Technical Field

[0001] This utility model relates to the field of coolers for gasoline / diesel / natural gas vehicles, and in particular to a structure that can improve the durability and reliability of EGR / C, specifically an adjustable water-side space in the EGR to perform two-stage cooling of the entire cooler. Background Technology

[0002] As the mileage of B10 in domestic commercial vehicles continues to increase, the reliability of EGR coolers in response to thermal shock is also constantly being improved. Reducing the surface temperature of EGR coolers is also an imperative measure, hence the relevant structural improvements.

[0003] The surface temperature of the intake mounting plate of the existing EGR cooler is relatively high, which seriously affects the reliability of the cooler. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a structure for adjusting the water-side flow field in an EGR and improving durability and reliability, so as to solve the difficulties of the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a structure that can improve the durability and reliability of EGR / C, comprising:

[0006] A water-side vent flange 1 has an air inlet 11 in the center of one side, and a pair of air inlets 11 are provided. The other side of the water-side vent flange 1 has an air outlet groove 12, which communicates with the air inlet 11.

[0007] A cooling unit 2 is bolted to one side of the air outlet groove 12 in the water-side vent flange 1.

[0008] The second-stage cooling group 4 is located at the first stage of the first-stage cooling group 2, away from the water-side vent flange 1.

[0009] The fixing plate 3 is positioned between the first cooling group 2 and the second cooling group 4.

[0010] According to the preferred embodiment, the first cooling unit 2 includes:

[0011] A cooling shell 21 is provided with a cooling groove 22 at one end near the water-side vent flange 1, and an air outlet groove 210 is provided in an array at the other end of the cooling shell 21, the air outlet groove 210 communicating with the cooling groove 22.

[0012] Water inlet pipe 23, which is installed on the side wall of a section of cooling shell 21 near the water-side vent flange 1, and one side of the water inlet pipe 23 is connected to the cooling tank 22;

[0013] L-shaped water outlet 24, the water outlet side of the L-shaped water outlet 24 is opened at one end of a section of cooling shell 21 away from the water side vent flange 1, the water inlet side of the L-shaped water outlet 24 is located on the side wall of a section of cooling shell 21 away from the water inlet pipe 23, and the water inlet side of the L-shaped water outlet 24 is connected to the cooling tank 22.

[0014] Diversion positioning vent cover 25 and diversion positioning vent cover 26, the diversion positioning vent cover 25 is installed on the side of a section of cooling shell 21 near the water-side vent flange 1, the diversion positioning vent cover 25 is located between a section of cooling shell 21 and the water-side vent flange 1, the diversion positioning vent cover 26 abuts against the bottom of the cooling tank 22, the diversion positioning vent cover 25 and the diversion positioning vent cover 26 are provided with diversion slots 27 in the array corresponding to the vent slots 210;

[0015] The heat exchange tube 28 is arranged in an array with corresponding diversion slots 27 between the diversion positioning vent cover 25 and the diversion positioning outlet cover 26.

[0016] According to the preferred embodiment, the heat exchange pipe 28, the diversion positioning vent cover 25, and the diversion positioning outlet cover 26 are integrally formed, and the outlet side of the heat exchange pipe 28 is connected to the diversion groove 27 on the diversion positioning vent cover 25 and the diversion positioning outlet cover 26.

[0017] According to the preferred embodiment, heat exchange arc-shaped grooves 29 are spaced apart on the side walls of the heat exchange tube 28.

[0018] According to the preferred embodiment, the fixing plate 3 is abutted against the side of a section of cooling shell 21 away from the water-side vent flange 1. A gas collecting convex shell 31 is provided in the center of the side of the fixing plate 3 away from the section of cooling shell 21. One side of the gas collecting convex shell 31 is connected to the air outlet groove 210. An elongated hole 32 is provided at equal intervals on the other side of the gas collecting convex shell 31. A water passage groove 33 is provided on the fixing plate 3 corresponding to the water outlet side of the L-shaped water outlet groove 24.

[0019] According to the preferred embodiment, the two-stage cooling group 4 includes:

[0020] The second-stage cooling shell 41 has one side abutting against the fixed plate 3 at the end away from the first-stage cooling shell 21;

[0021] Heat exchange tank 42 is located in the center of the two-section cooling shell 41;

[0022] Water-proof pipes 43 are arranged at equal intervals in the center of heat exchange tank 42. One side of each water-proof pipe 43 is interference-fitted into an elongated hole 32. A support protrusion 44 is integrally provided between adjacent water-proof pipes 43.

[0023] The L-shaped water inlet trough 45 is located on the side of the second-stage cooling shell 41 near the fixed plate 3. The water inlet side of the L-shaped water inlet trough 45 is connected to the water passage trough 33 and the L-shaped water outlet trough 24, and the water outlet side of the L-shaped water inlet trough 45 is connected to the heat exchange trough 42.

[0024] According to the preferred embodiment, the first cooling shell 21 is I-shaped, and the second cooling shell 41 is T-shaped.

[0025] This invention employs a water-side vent flange, a first-stage cooling group, a second-stage cooling group, and a fixed plate. High-temperature gas is first introduced into the first-stage cooling group for cooling, and then enters the second-stage cooling group for heat exchange. The two rounds of heat exchange reduce the temperature of the fixed plate surface at the air intake position, thereby improving the reliability of the EGR.

[0026] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0027] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0028] Figure 2 This is shown as a cross-sectional view of the present invention;

[0029] Figure 3 The diagram shown is an enlarged three-dimensional structural schematic of the water-side vent flange in this utility model.

[0030] Figure 4 The diagram shown is an enlarged three-dimensional structural schematic of a section of the cooling shell in this utility model.

[0031] Figure 5 The diagram shown is an enlarged three-dimensional structural schematic of a section of the cooling shell in this utility model from another perspective.

[0032] Figure 6 The diagram shows the structure of the heat exchange tube, the diversion positioning vent cover, and the diversion positioning vent cover in this utility model.

[0033] Figure 7 The diagram shown is an enlarged three-dimensional structural schematic of the fixing plate in this utility model.

[0034] Figure 8 The diagram shown is an enlarged three-dimensional structural schematic of the water-proof pipe in this utility model.

[0035] Figure 9 This is shown as a conventional water-side structure in EGR in the background art of this utility model;

[0036] Figure 10 Temperature field diagrams of the fixed plate in the EGR using the water-side structure of this invention and the EGR using a conventional water-side structure.

[0037] Label Explanation

[0038] 1. Water-side vent flange;

[0039] 11. Air inlet; 12. Air outlet square groove;

[0040] 2. First-stage cooling system;

[0041] 21. A section of cooling shell; 22. Cooling tank; 23. Water inlet pipe; 24. L-shaped water outlet tank; 25. Diversion positioning vent cover; 26. Diversion positioning air outlet cover; 27. Diversion groove; 28. Heat exchange pipe; 29. ​​Heat exchange arc groove; 210. Air outlet groove;

[0042] 3. Fixing plate;

[0043] 31. Gas collecting convex shell; 32. Oblong hole; 33. Water passage groove;

[0044] 4. Two-stage cooling system;

[0045] 41. Two-stage cooling shell; 42. Heat exchange tank; 43. Water inlet pipe; 44. Support protrusion; 45. L-shaped water inlet. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0047] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0048] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0049] This invention proposes a structure that can improve the durability and reliability of EGR / C, and is used in the cooling design process of the intake fixing plate.

[0050] In general, the structure of the EGR with adjustable water-side flow and enhanced intake-side core strength proposed in this utility model mainly includes: a water-side vent flange 1, a first-stage cooling assembly 2, a second-stage cooling assembly 4, and a fixing plate 3. See also... Figure 1 It shows the arrangement of the water-side vent flange 1, the first-stage cooling group 2, the second-stage cooling group 4, and the fixed plate 3.

[0051] The structure proposed in this invention, which improves the durability and reliability of EGR / C, pre-cools the high-temperature gas through a first-stage cooling group 2, and then allows it to enter a second-stage cooling group 4 for heat exchange. This two-stage heat exchange lowers the surface temperature of the fixed plate 3 at the air intake position. Using Struts CCM simulation with an intake temperature of 800℃ and an intake flow rate of 8.33 kg / min, the water inlet temperature in the EGR system equipped with this structure (proposed to improve EGR / C durability and reliability) is set at 90℃ and a water flow rate of 182 L / min. Figure 9 The traditional water-side design structure of the EGR was compared experimentally, such as the temperature field. Figure 10 In traditional water-side EGR designs, the high-temperature zone of the fixed plate is located at the interval of the elongated holes 32, with a maximum temperature of 425°C. However, the temperature in the area of ​​the gas collecting convex shell 31 of the fixed plate in the EGR proposed in this invention is more balanced, with a maximum temperature of 336°C and a surface temperature reduction of 89°C, thus improving the reliability of the EGR.

[0052] The water-side vent flange 1 has an air inlet 11 in the center of one side, and there is a pair of air inlets. The other side of the water-side vent flange 1 has an air outlet groove 12, which communicates with the air inlet 11.

[0053] The aforementioned cooling unit 2 is bolted to one side of the air outlet groove 12 in the water-side vent flange 1. The cooling unit 2 includes: a cooling shell 21, an inlet pipe 23, an L-shaped outlet trough 24, a venting cover 25, and a heat exchange pipe 28. The cooling shell 21 has a cooling trough 22 at one end near the water-side vent flange 1, and an air outlet trough 210 at the other end, communicating with the cooling trough 22. The inlet pipe 23 passes through the side wall of the cooling shell 21 near the water-side vent flange 1, communicating with the cooling trough 22. The L-shaped outlet trough 24 has its outlet side located at the end of the cooling shell 21 away from the water-side vent flange 1, and its inlet side located on the side wall of the cooling shell 21 away from the inlet pipe 23, communicating with the cooling trough 22. The cooling shell 21 has a cooling trough 22 at one end near the water-side vent flange 1. A diversion positioning vent cover 25 is installed on one side of the flange 1. The diversion positioning vent cover 25 is located between a section of the cooling shell 21 and the water-side vent flange 1. A diversion positioning outlet cover 26 is installed at the bottom of the cooling tank 22. Diversion positioning vent cover 25 and diversion positioning outlet cover 26 are arranged with diversion slots 27 corresponding to the outlet slots 210. Heat exchange pipes 28 are arranged with diversion slots 27 corresponding to the diversion slots 27 between diversion positioning vent cover 25 and diversion positioning outlet cover 26. Heat exchange pipes 28, diversion positioning vent cover 25 and diversion positioning outlet cover 26 are integrated to prevent air leakage. The outlet side of heat exchange pipes 28 is connected to the diversion slots 27 on diversion positioning vent cover 25 and diversion positioning outlet cover 26. Heat exchange arc-shaped slots 29 are spaced apart on the four sides of heat exchange pipes 28 to increase the heat dissipation area and improve heat dissipation efficiency.

[0054] The aforementioned fixing plate 3 is abutted against the side of a section of cooling housing 21 away from the water-side vent flange 1. A gas collecting convex shell 31 is provided in the center of the side of the fixing plate 3 away from the section of cooling housing 21. One side of the gas collecting convex shell 31 communicates with the air outlet groove 210. An elongated hole 32 is provided at equal intervals on the other side of the gas collecting convex shell 31. A water passage groove 33 is provided on the fixing plate 3 corresponding to the water outlet side of the L-shaped water outlet groove 24.

[0055] The aforementioned two-stage cooling group 4 is located at the first stage of the first-stage cooling group 2 away from the water-side vent flange 1. The two-stage cooling group 4 includes: a two-stage cooling shell 41, a heat exchange tank 42, a water-insulating pipe 43, and an L-shaped water inlet tank 45. The second-stage cooling shell 41 abuts against the fixed plate 3 at one end away from the first-stage cooling shell 21. The heat exchange tank 42 is opened in the center of the second-stage cooling shell 41. The water-insulating pipes 43 are arranged at equal intervals in the center of the heat exchange tank 42. One side of the water-insulating pipe 43 is interference-fitted into the elongated hole 32. A supporting protrusion 44 is integrally provided between adjacent water-insulating pipes 43. The L-shaped water inlet tank 45 is opened on the side of the second-stage cooling shell 41 near the fixed plate 3. The water inlet side of the L-shaped water inlet tank 45 is connected to the water channel 33 and the L-shaped water outlet tank 24. The water outlet side of the L-shaped water inlet tank 45 is connected to the heat exchange tank 42.

[0056] The gas path in the structure proposed in this utility model that can improve the durability and reliability of EGR / C includes: a high-temperature gas flow enters from the inlet 11 of the water-side vent flange 1, passes through the outlet 210, enters the diversion groove 27 on the diversion positioning vent cover 25 of the first-stage cooling group 2 for diversion, enters the heat exchange tube 28 for primary cooling, and then exits from the diversion groove 27 in the diversion positioning outlet cover 26, passes through the fixing plate 3, and enters the water-proof pipe 43 in the second-stage cooling group 4 for secondary cooling.

[0057] The water circuit in the structure proposed in this utility model that can improve the durability and reliability of EGR / C includes: the heat exchange medium enters the first cooling shell 21 from the inlet pipe 23 to cool the inlet pipe 23 through heat exchange, and then exits from the L-shaped outlet trough 24. It then enters the second cooling shell 41 from the L-shaped inlet trough 33 in the fixed plate 3 to cool the water pipe 43 a second time.

[0058] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A structure that can improve the durability and reliability of EGR / C, characterized in that, include: A water-side vent flange (1) has an air inlet (11) in the center of one side, and a pair of air inlets (11) are provided. The other side of the water-side vent flange (1) is an air outlet groove (12), which is connected to the air inlet (11). A cooling unit (2) is provided on one side of the air outlet groove (12) in the water-side vent flange (1) by bolt connection; The two-stage cooling group (4) is located at the first stage of the first-stage cooling group (2) away from the water-side vent flange (1); The fixing plate (3) is positioned between the first cooling group (2) and the second cooling group (4).

2. The structure for improving EGR / C durability and reliability according to claim 1, characterized in that, The cooling unit (2) includes; A cooling shell (21) is provided with a cooling groove (22) at one end near the water-side vent flange (1), and an air outlet groove (210) is provided at the other end of the cooling shell (21), which is connected to the cooling groove (22). Water inlet pipe (23) is installed on the side wall of a section of cooling shell (21) near the water-side vent flange (1), and one side of the water inlet pipe (23) is connected to the cooling tank (22); L-shaped water outlet trough (24), the water outlet side of the L-shaped water outlet trough (24) is opened at the end of a section of cooling shell (21) away from the water side vent flange (1), the water inlet side of the L-shaped water outlet trough (24) is located on the side wall of a section of cooling shell (21) away from the water inlet pipe (23), and the water inlet side of the L-shaped water outlet trough (24) is connected to the cooling trough (22); The diversion positioning vent cover (25) and the diversion positioning vent cover (26) are provided. The diversion positioning vent cover (25) is installed on the side of a cooling shell (21) near the water-side vent flange (1). The diversion positioning vent cover (25) is located between a cooling shell (21) and the water-side vent flange (1). The diversion positioning vent cover (26) is abutted against the bottom of the cooling tank (22). The diversion positioning vent cover (25) and the diversion positioning vent cover (26) are provided with diversion slots (27) in the array of corresponding vent slots (210). The heat exchange tube (28) is arranged in a corresponding diversion groove (27) array between the diversion positioning vent cover (25) and the diversion positioning outlet cover (26).

3. The structure for improving EGR / C durability and reliability according to claim 2, characterized in that, The heat exchange pipe (28), the diversion positioning vent cover (25) and the diversion positioning outlet cover (26) are integrally set. The outlet side of the heat exchange pipe (28) is connected to the diversion groove (27) on the diversion positioning vent cover (25) and the diversion positioning outlet cover (26).

4. The structure for improving EGR / C durability and reliability according to claim 3, characterized in that, The heat exchange tube (28) has heat exchange arc grooves (29) spaced apart on its four sides.

5. The structure according to claim 4 that can improve the durability and reliability of EGR / C, characterized in that, The fixing plate (3) is abutted on the side of a section of cooling shell (21) away from the water-side vent flange (1). A gas collecting convex shell (31) is provided in the center of the side of the fixing plate (3) away from the section of cooling shell (21). One side of the gas collecting convex shell (31) is connected to the air outlet groove (210). The other side of the gas collecting convex shell (31) is provided with elongated holes (32) at equal intervals. A water passage groove (33) is provided on the fixing plate (3) corresponding to the water outlet side of the L-shaped water outlet groove (24).

6. The structure according to claim 5 that can improve the durability and reliability of EGR / C, characterized in that, The two-stage cooling group (4) includes: The two-stage cooling shell (41) has one side abutting against the fixed plate (3) at the end away from the first-stage cooling shell (21); A heat exchange tank (42) is located in the center of the two-stage cooling shell (41); Water-proof pipes (43) are arranged at equal intervals in the center of heat exchange tank (42). One side of the water-proof pipes (43) is interference-fitted into the elongated hole (32). A support protrusion (44) is integrally provided between adjacent water-proof pipes (43). L-shaped water inlet trough (45), the L-shaped water inlet trough (45) is opened on the side of the second-stage cooling shell (41) near the fixed plate (3), the water inlet side of the L-shaped water inlet trough (45) is connected to the water passage trough (33) and the L-shaped water outlet trough (24), and the water outlet side of the L-shaped water inlet trough (45) is connected to the heat exchange trough (42).

7. The structure according to claim 6 that can improve the durability and reliability of EGR / C, characterized in that, The first cooling shell (21) is I-shaped, and the second cooling shell (41) is T-shaped.

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