CN211777753U

CN211777753U - EGR cooler casing and EGR cooler

Info

Publication number: CN211777753U
Application number: CN202020250273.2U
Authority: CN
Inventors: 汤佳伟; 高建新
Original assignee: Zhejiang Yinlun Machinery Co Ltd
Current assignee: Zhejiang Yinlun Machinery Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-10-27
Anticipated expiration: 2030-03-04

Abstract

The utility model relates to a heat exchanger technical field, in particular to EGR cooler casing and EGR cooler. The EGR cooler shell comprises a shell body and a protruding portion arranged on the shell body, wherein the cooling pipe is accommodated in the shell body, and the protruding portion protrudes towards the inside of the shell body so as to be capable of being abutted against the cooling pipe. The utility model provides a EGR cooler casing is through setting up the bellying on the shell body to there is the rosin joint with the turbulent piece that sets up in its inside cooling tube in avoiding the outside, thereby avoids setting up fin, reduction in production cost between shell body and cooling tube.

Description

EGR cooler casing and EGR cooler

Technical Field

The utility model relates to a heat exchanger technical field, in particular to EGR cooler casing and EGR cooler.

Background

As shown in fig. 1 and 2, an EGR cooler of a plate-fin integral brazing structure in the related art includes a housing 1 and a plurality of cooling tubes 2 disposed in the housing 1, a length direction of the cooling tubes 2 being identical to a length direction of the housing 1, the plurality of cooling tubes 2 being stacked in a thickness direction of the housing 1; a first medium channel for flowing of a first medium is formed in one cooling pipe 2, a second medium channel for flowing of a second medium is formed between two adjacent cooling pipes 2, the second medium flows in the second medium channel while the first medium flows in the first medium channel, and heat exchange is realized between the first medium and the second medium.

In order to improve the heat exchange performance, generally, turbulence fins 3 with the extension direction consistent with the length direction of the cooling pipes are welded in the cooling pipes 2, fins are arranged between two adjacent cooling pipes, and a flow channel needs to be arranged between the cooling pipe 2 at the outermost side and the side wall of the shell 1; in the integral brazing process, the cooling pipe is heated to expand, so that a gap is easily formed between the cooling pipe and the turbulence sheet, and the cold joint between the cooling pipe and the turbulence sheet is caused; the side fins 4 are normally arranged in the flow channels against the cooling tubes to avoid cold joints, which makes the production of the EGR cooler expensive.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an EGR cooler casing and EGR cooler to solve the high technical problem of manufacturing cost of the EGR cooler among the prior art.

The utility model provides a EGR cooler casing, include: the shell body and the boss that sets up on the shell body, be used for holding the cooling tube in the shell body, the boss to the inside arch of shell body for be used for with the cooling tube butt.

Further, the protruding portion includes a lateral protrusion, and an extending direction of the lateral protrusion intersects with a length direction of the case body.

Further, the protruding portion includes a longitudinal protrusion, and an extending direction of the longitudinal protrusion coincides with a length direction of the case body.

Further, the number of the longitudinal protrusions is multiple, and the longitudinal protrusions are arranged at intervals in the thickness direction of the shell body.

Further, the transverse protrusion is arranged in the middle of the shell body, and the longitudinal protrusions are arranged on two sides of the transverse protrusion.

Further, the convex portion further includes a point protrusion.

Further, the point protrusion is disposed on a side of the longitudinal protrusion away from the lateral protrusion.

Further, the boss is formed by press molding of the case body.

Further, the shell body comprises a first side plate and a second side plate which are arranged oppositely, and the first side plate and the second side plate are both provided with the protruding portions.

The utility model also provides a EGR cooler, including cooling tube and foretell EGR cooler casing, the bellying with the cooling tube butt.

The utility model provides a EGR cooler casing, including shell body and the bellying of setting on shell body, this internal cooling tube that is used for of shell, the bellying is protruding to shell body's inside to can with the cooling tube butt.

In the process of producing the EGR cooler by adopting the EGR cooler shell, a plurality of cooling tubes and a plurality of fins are placed in the shell body, one fin is arranged between two adjacent cooling tubes, a welding flux is coated between the cooling tubes and turbulence sheets arranged in the cooling tubes, the welding flux is coated between the cooling tubes and the fins, and then the whole EGR cooler is placed in a welding furnace for brazing; in the welding process, the cooling pipes are heated to expand, the outer wall of the cooling pipe which is positioned on the outermost side and close to the shell is abutted against the boss on the shell body, the boss prevents the outer wall of the cooling pipe from expanding towards the direction far away from the turbulence sheet, so that a gap between the outer wall and the turbulence sheet is avoided, the cooling pipe in the middle is limited by the fins, and therefore cold welding between the cooling pipe and the turbulence sheet can be avoided. The utility model provides a EGR cooler casing is through setting up the bellying on the shell body to there is the rosin joint with the turbulent piece that sets up in its inside cooling tube in avoiding the outside, thereby avoids setting up fin, reduction in production cost between shell body and cooling tube.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of an EGR cooler housing in the related art;

FIG. 2 is a cut-away view of the EGR cooler housing shown in FIG. 1;

FIG. 3 is a schematic structural view of an EGR cooler housing according to an embodiment of the present invention;

fig. 4 is a sectional view of an EGR cooler according to an embodiment of the present invention.

In the figure: 10-a shell body; 20-a boss; 30-a cooling tube; 40-turbulence sheet; 50-a fin; 11-a first side panel; 12-a second side panel; 21-transverse bulge; 22-longitudinal protrusions; 23-point convex; 31-a first cooling tube; 32-second cooling pipe.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 3 and 4, the utility model provides an EGR cooler casing, including shell body 10 and the boss 20 of setting on shell body 10, be used for holding cooling tube 30 in the shell body 10, boss 20 is protruding to the inside of shell body 10 for with cooling tube 30 butt.

In the process of producing the EGR cooler by using the EGR cooler shell provided by the embodiment, a plurality of cooling tubes 30 and a plurality of fins 50 are placed in the shell body 10, one fin 50 is arranged between two adjacent cooling tubes 30, a welding material is coated between the cooling tube 30 and the turbulence sheet 40 arranged in the cooling tube, a welding material is coated between the cooling tube 30 and the fin 50, and then the whole EGR cooler is placed in a welding furnace for brazing.

During the welding process, the cooling tubes 30 are heated to expand, the outer wall of the cooling tube 30 located at the outermost side close to the shell abuts against the boss 20 on the shell body 10, the boss 20 prevents the outer wall of the cooling tube 30 from expanding in the direction away from the turbulence fins 40, so that a gap between the outer wall and the turbulence fins 40 is avoided, and the cooling tube 30 at the middle part is limited by the fins 50, so that a cold joint between the cooling tube 30 and the turbulence fins 40 is avoided.

The EGR cooler casing provided by the embodiment is provided with the protruding part 20 on the casing body 10, so that the cooling pipe 30 at the outermost side and the turbulent flow sheet 40 arranged in the cooling pipe are prevented from being in false welding, extra fins are prevented from being arranged between the casing body 10 and the cooling pipe 30, the production cost is reduced, the assembly of the EGR cooler is facilitated, and the production efficiency of the EGR cooler is improved.

It should be noted that the cooling tube 30 is a flat structure (the length and width of the cooling tube 30 are both much larger than the thickness of the cooling tube), the length direction of the cooling tube 30 is consistent with the length direction of the shell body 10, the thickness direction of the cooling tube 30 is consistent with the thickness direction of the shell body 10, and the plurality of cooling tubes 30 are stacked in the thickness direction of the shell body 10; the shell body 10 comprises four side plates which are sequentially connected end to end, wherein two side plates are oppositely arranged in the thickness direction of the shell body 10, one side plate is a first side plate 11, the other side plate is a second side plate 12, two cooling pipes 30 which are positioned on the outermost side of the cooling pipes 30 are provided, one side plate is a first cooling pipe 31, the other side plate is a second cooling pipe 32, the first side plate 11 is just opposite to the first cooling pipe 31, and the second side plate 12 is just opposite to the second cooling pipe 32. The projection 20 may be provided on the first side plate 11, or the projection 20 may be provided on the second side plate 12.

As an alternative, as shown in fig. 4, the first side plate 11 and the second side plate 12 are provided with the protrusions 20, so that the two cooling tubes 30 located at the outermost sides can be prevented from being cold-welded to the corresponding turbulence fins 40, and no additional fins need to be arranged in the flow channel formed between the first cooling tube 31 and the first side plate 11 and the flow channel formed between the second cooling tube 32 and the second side plate 12, thereby further reducing the production cost and further improving the production efficiency.

Among them, there are various forms of providing the protruding portion 20 on the case body 10, for example: the protruding portion 20 is a block structure or a frame structure, and the protruding portion 20 is fixed on the inner wall of the case body 10 by welding, clamping, interference connection, or threaded connection.

As an alternative, the protruding portion 20 is formed by stamping on the housing body 10, so that the protruding portion 20 and the housing body 10 can be prevented from being mounted twice, and can be formed once, the connection strength between the protruding portion 20 and the housing body 10 is high, the sealing performance is good, and the production efficiency can be further improved.

The structural form of the convex portion 20 may be various, for example: as shown in fig. 3, the protrusion 20 may include a lateral protrusion 21, and an extending direction of the lateral protrusion 21 is disposed to intersect with a length direction of the case body 10.

In this embodiment, a first medium channel for flowing a first medium is formed inside the cooling tube 30, a second medium channel for flowing a second medium is formed between two adjacent cooling tubes 30 at intervals, a cooling cavity is formed in the shell body 10, the second medium enters from one end of the shell body 10 and flows through the second medium channel, and finally flows out from an outlet at the other end of the shell body 10, thereby completing heat exchange. The second medium is substantially transported along the longitudinal direction of the case body 10, and the case body 10 is provided with the lateral protrusions 21 whose extending direction intersects with the longitudinal direction of the case body 10, so that the strength of the case body 10 can be improved.

The extending direction of the transverse protrusion 21 and the length direction of the housing body 10 may be arranged at an acute angle, or the extending direction of the transverse protrusion 21 and the length direction of the housing body 10 may be arranged at an acute angle and an obtuse angle. Optionally, the extending direction of the transverse protrusion 21 is perpendicular to the length direction of the housing body 10, that is, the extending direction of the transverse protrusion 21 is perpendicular to the length direction of the housing body 10, so that the strength of the housing body 10 can be better improved, and the arrangement is convenient.

The form of the structure of the lateral projection 21 can be various, for example: the transverse protrusion 21 is arranged in a rectangular shape, or the transverse protrusion 21 is arranged in a waist shape, or the transverse protrusion 21 is arranged in an oval shape, etc.

The number of the lateral protrusions 21 may be one, and may also be two, three, or four, and the like, and when the number of the lateral protrusions 21 is plural, the plural lateral protrusions 21 are provided at intervals along the length direction of the case body 10.

For another example: as shown in fig. 3, the boss 20 includes a longitudinal protrusion 22, and the longitudinal protrusion 22 extends in a direction corresponding to the length direction of the case body 10.

In this embodiment, the longitudinal protrusion 22 extends along the length direction of the shell body 10, so that the second medium flowing in the flow channel formed between the cooling pipe 30 and the shell body 10 can be guided, and the longitudinal protrusion 22 can avoid laminar flow of the second medium, thereby improving the flowing effect of the second medium.

The structural form of the longitudinal protrusion 22 may be various, for example: the longitudinal protrusions 22 are arranged in a rectangular shape, or the longitudinal protrusions 22 are arranged in a waist shape, or the longitudinal protrusions 22 are arranged in an oval shape, etc.

The number of the longitudinal projections 22 may be one.

Optionally, the number of the longitudinal protrusions 22 is plural, for example, the number of the longitudinal protrusions 22 is two or three, and so on, the plural longitudinal protrusions 22 form a longitudinal protrusion group, the plural longitudinal protrusions 22 can form more flow guiding channels, which is more beneficial for guiding the second medium, and the plural longitudinal protrusions 22 can cause turbulence of the second medium, which is more beneficial for optimizing the flow field of the second medium. A plurality of longitudinal protrusions 22 are provided at intervals in the width direction of the case body 10.

Only the lateral protrusions 21 or only the longitudinal protrusions 22 may be provided on the case body 10.

Optionally, the housing body 10 is provided with both the transverse protrusions 21 and the longitudinal protrusions 22, which not only can improve the strength of the housing body 10, but also can improve the flowing effect of the second medium.

The position relationship between the transverse protrusion 21 and the longitudinal protrusion 22 may be various, for example: the transverse bulge 21 is arranged at one end of the shell body 10, and the longitudinal bulge 22 is arranged in the middle of the shell body 10; or a plurality of lateral projections 21, a plurality of longitudinal projection groups, a plurality of lateral projections 21 and a plurality of longitudinal projection groups arranged alternately, and so on.

As an alternative, as shown in fig. 3, a lateral projection 21 is provided at the center of the case body 10, and longitudinal projections 22 are provided on both sides of the lateral projection 21. In this embodiment, horizontal arch 21 sets up and compares in the middle part of shell body 10 and set up the tip at shell body 10 in horizontal arch 21, can play more important effect, avoids shell body 10's middle part intensity not enough and leads to shell body 10 whole deformation, and vertical arch 22 sets up in the both sides of horizontal arch 21, more is favorable to the drainage.

For another example: the boss 20 further includes a point protrusion 23. In this embodiment, the point protrusion 23 is disposed on the shell body 10, which can disturb the flow of the second medium, so that the second medium is turbulent, and heat exchange is facilitated.

The dot protrusion 23 may be in various structures, for example: the dot protrusion 23 has a circular, rectangular, or triangular cross-section, etc.

The number of the dot projections 23 may be one, and may be two, three, or four, and so on.

Only the lateral projections 21 and the longitudinal projections 22 may be provided on the case body 10, and only the dot projections 23 may be provided on the case body 10.

Optionally, the shell body 10 is provided with the transverse protrusion 21, the longitudinal protrusion 22 and the point protrusion 23 at the same time, and this structure can reinforce the strength of the shell body 10 and also can guide and disturb the second medium, so that the flowing effect of the second medium is better.

The position relationship among the dot protrusion 23, the lateral protrusion 21, and the longitudinal protrusion 22 may be various, for example: the dot projections 23 are provided between the longitudinal projections 22 and the lateral projections 21; optionally, the point protrusion 23 is disposed on a side of the longitudinal protrusion 22 away from the transverse protrusion 21, that is, the point protrusion 23 is located at an end of the shell body 10, the transverse protrusion 21 is located at a middle of the shell body 10, the longitudinal protrusion 22 is located between the point protrusion 23 and the transverse protrusion 21, and the longitudinal protrusion 22 and the point protrusion 23 are disposed on two sides of the transverse protrusion 21.

It should be noted that the number and size of the lateral protrusions 21, the longitudinal protrusions 22, and the dot protrusions 23 may be set according to the specific application environment of the EGR cooler.

It should be noted that, when the lateral protrusion 21, the longitudinal protrusion 22 and the point protrusion 23 are simultaneously disposed on the housing body 10, one of the lateral protrusion 21, the longitudinal protrusion 22 and the point protrusion 23 may abut against the cooling pipe 30, for example, the lateral protrusion 21 abuts against the cooling pipe 30, or the longitudinal protrusion 22 abuts against the cooling pipe 30, or the point protrusion 23 abuts against the cooling pipe 30; or, two of the three parts are abutted against the cooling pipe 30, and for example, the transverse projection 21 and the longitudinal projection 22 are abutted against the cooling pipe 30, or the transverse projection 21 and the point projection 23 are abutted against the cooling pipe 30, or the longitudinal projection 22 and the point projection 23 are abutted against the cooling pipe 30; further, for example, all three are abutted against the cooling pipe 30. Of course, in consideration of stability of support of the cooling pipe 30, a structure located at the middle portion of the case body 10 may be selected to abut against the cooling pipe 30.

As shown in fig. 4, the utility model provides an EGR cooler, including cooling tube 30 and above-mentioned EGR cooler casing, bellying 20 and cooling tube 30 butt, cooling tube 30 are a plurality ofly, and a plurality of cooling tubes 30 stack up the setting along the thickness direction of shell body 10, are provided with turbulent flow piece 40 in the cooling tube 30, establish between two adjacent cooling tubes 30 by fin 50.

In the process of producing the EGR cooler provided by the present embodiment, a plurality of cooling tubes 30 and a plurality of fins 50 are placed in the housing body 10, one fin 50 is disposed between two adjacent cooling tubes 30, solder is applied between the cooling tube 30 and the turbulence sheet 40 disposed inside the cooling tube, solder is applied between the cooling tube 30 and the fin 50, and then the whole EGR cooler is placed in a soldering furnace for soldering; during the welding process, the cooling tubes 30 are heated to expand, the outer wall of the cooling tube 30 located at the outermost side close to the shell abuts against the boss 20 on the shell body 10, the boss 20 prevents the outer wall of the cooling tube 30 from expanding in the direction away from the turbulence fins 40, so that a gap between the outer wall and the turbulence fins 40 is avoided, and the cooling tube 30 at the middle part is limited by the fins 50, so that a cold joint between the cooling tube 30 and the turbulence fins 40 is avoided. The EGR cooler housing provided by this embodiment avoids the cold joint between the cooling tube 30 at the outermost side and the turbulent flow sheet 40 arranged inside the cooling tube 30 by arranging the protruding portion 20 on the housing body 10, thereby avoiding the extra fin arranged between the housing body 10 and the cooling tube 30.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An EGR cooler housing, comprising: the shell body and the boss that sets up on the shell body, be used for holding the cooling tube in the shell body, the boss to the inside arch of shell body for be used for with the cooling tube butt.

2. The EGR cooler housing of claim 1 wherein the boss comprises a lateral projection, the lateral projection extending in a direction that intersects a length direction of the housing body.

3. The EGR cooler housing of claim 2 wherein the boss comprises a longitudinal projection extending in a direction that coincides with a length direction of the housing body.

4. The EGR cooler housing according to claim 3, wherein the number of the longitudinal protrusions is plural, and the plural longitudinal protrusions are provided at intervals in a thickness direction of the case body.

5. The EGR cooler housing of claim 3, wherein the transverse projection is disposed at a middle portion of the shell body, the longitudinal projection being disposed on both sides of the transverse projection.

6. The EGR cooler housing of claim 5, wherein the raised portion further comprises a point protrusion.

7. The EGR cooler housing of claim 6, wherein the point protrusion is disposed on a side of the longitudinal protrusion remote from the transverse protrusion.

8. The EGR cooler housing according to any of claims 1-7, characterized in that the boss is press-formed by the housing body.

9. The EGR cooler housing of claim 1, wherein the housing body includes first and second oppositely disposed side plates, the bosses being disposed on both the first and second side plates.

10. An EGR cooler characterized by comprising a cooling pipe and the EGR cooler housing according to any one of claims 1 to 9, the boss abutting against the cooling pipe.