CN214747460U

CN214747460U - Heat exchange tube core of EGR cooler

Info

Publication number: CN214747460U
Application number: CN202022953439.XU
Authority: CN
Inventors: 景建周; 汤俊洁; 张云通; 胡于波
Original assignee: Weinan Meilianqiao Automobile New Technology Research Institute Co ltd
Current assignee: Liaoning Lianyoubo Technology Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-11-16
Anticipated expiration: 2030-12-11

Abstract

The embodiment of the utility model discloses EGR cooler's heat transfer tube core, including flat sleeve pipe, fin group and choked flow device, the flat sleeve pipe is the flat tubular construction of inner face for the R fillet of both sides wall, fin group level sets up at flat sheathed tube, including a plurality of corrugate heat transfer fins that set up side by side, and the heat transfer fin in the two outsides of fin group respectively with be formed with the clearance passageway between the flat sheathed tube fillet inner wall, choked flow device sets up at flat sheathed tube end of giving vent to anger, including two choked flow pieces that set up respectively in fin group both sides clearance passageway department to reduce clearance passageway's flow area. The utility model discloses an add the choked flow device at flat sheathed tube end of giving vent to anger to reduce the flow area of back heat transfer fin and flat sheathed tube in R fillet department after the welding, thereby increase the flow resistance, make the waste gas of fin group more even in the heat transfer tube core of flowing through, avoid waste gas to concentrate from clearance channel department and pass through, realized the effect of little becoming increase.

Description

Heat exchange tube core of EGR cooler

Technical Field

The embodiment of the utility model provides a relate to exhaust gas recirculation technical field, concretely relates to EGR cooler's heat transfer tube core.

Background

The Exhaust Gas Recirculation (EGR) technology is a system for reducing NOx by recirculating a part of Exhaust Gas to an intake system to increase the concentration of CO2 in intake air and reduce the temperature of a combustion chamber, and is a control method with low cost, small engine modification and effective reduction of NOx emission.

The cooler in the EGR system is the device that is used for cooling down exhaust gas, and tube fin cooler structure mainly includes the shell and sets up in the inside tube core of shell, the tube core includes the flat pipe subassembly of a plurality of waste gas, and the flat pipe of waste gas and shell have constituted shell and tube type heat exchanger, the cooling water that flows in the shell, and the waste gas that the flat inboard circulation engine of waste gas claps out, waste gas and cooling water carry out the heat exchange to realize cooling. And heat exchange fins are generally placed in the flat exhaust pipe.

And at present flat sleeve pipe for easy shaping, easy welding, both sides adopt the R fillet, and the upper and lower face and the flat sleeve pipe of fin weld through the form of brazing, and the clearance of brazing back flat sleeve pipe R department is far greater than the fin interval, leads to the air current inhomogeneous, and a large amount of waste gas flows away from both sides R department, makes heat exchange efficiency reduce.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a heat exchange tube core of EGR cooler to solve among the prior art because the clearance of flat sleeve pipe R department is far greater than the fin interval and leads to the problem that heat exchange efficiency reduces.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to the utility model discloses an on the one hand, a heat transfer tube core of EGR cooler, including flat sleeve pipe, fin group and choked flow device, flat sleeve pipe is the flat tubular construction of the inner face of both sides wall for the R fillet, and flat sheathed tube one end is the opening setting to form the end of giving vent to anger, fin group level sets up at flat sheathed tube, including a plurality of corrugate heat transfer fins that set up side by side, so that form continuous S type heat transfer passageway between two adjacent heat transfer fins, and the heat transfer fin in the two outsides of fin group respectively with be formed with gapped passageway between the flat sheathed tube fillet inner wall, choked flow device sets up at flat sheathed tube end of giving vent to anger, including two choked flow pieces that set up respectively in fin group both sides clearance passageway department, with the flow area who reduces gapped passageway.

Furthermore, the heat exchange fins are of a corrugated structure formed by continuously stamping and bending along the length direction of the flat sleeve, and comprise a plurality of wave crests and a plurality of wave troughs which are alternately arranged.

Furthermore, the upper edge and the lower edge of the heat exchange fin are welded with the flat sleeve in a brazing mode.

Furthermore, the flow resisting piece is a flow resisting baffle welded at the air outlet end of the flat sleeve, and the flow area of the gap channel is reduced at the air outlet end of the flat sleeve by the flow resisting piece.

Furthermore, the flow blocking piece is a flow blocking barrier strip welded at the air outlet end of the flat sleeve, and the flow blocking barrier strip penetrates through the flat sleeve along the gap channel, so that the flow area of the gap channel is reduced in the flat sleeve by the flow blocking piece.

Furthermore, the interior of the flat sleeve comprises a plurality of groups of fin groups which are arranged side by side from top to bottom.

Furthermore, the flow resisting piece is an integral block or a stamping baffle arranged at the air outlet end of the flat sleeve, teeth are integrally formed on the flow resisting piece, the teeth of the flow resisting piece extend into the gap channel of the flat sleeve, and the flow area of the gap channel is reduced at the air outlet end of the flat sleeve by the flow resisting piece.

The embodiment of the utility model provides a have following advantage: under the condition that the size of a traditional heat exchange tube core is unchanged and the structural change is small, a flow blocking device is additionally arranged at the air outlet end of a flat sleeve, so that the flow area of a welded heat exchange fin and the flat sleeve at an R fillet is reduced, the flow resistance is increased, waste gas flowing through a fin group in the heat exchange tube core is more uniform, the waste gas is prevented from passing through a gap channel in a concentrated mode, the basic heat exchange function is met, about 2% of heat exchange performance can be improved, the cost is increased less, and the small-cost synergistic effect is achieved.

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 structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic diagram of an overall structure of a heat exchange tube core of an EGR cooler according to an embodiment of the present invention;

fig. 2 is an assembly schematic view of a choke bar of a heat exchange tube core of an EGR cooler according to an embodiment of the present invention;

fig. 3 is an assembly schematic diagram of an integral stopper of a heat exchange tube core of an EGR cooler according to an embodiment of the present invention;

fig. 4 is an assembly schematic diagram of an integral stamping baffle of a heat exchange tube core of an EGR cooler according to an embodiment of the present invention.

In the figure: 1. a flat sleeve; 11. a clearance channel; 2. a fin set; 3. a flow blocking device.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1, an embodiment of the present invention provides a heat exchange tube core of an EGR cooler, which includes a flat sleeve 1, a fin group 2, and a flow blocking device 3. The inner surfaces of the two side walls of the flat sleeve 1 are of flat tube structures with R round corners, and one end of the flat sleeve 1 is provided with an opening to form an air outlet end. Fin group 2 level sets up in flat sleeve pipe 1, including a plurality of corrugate heat transfer fin that set up side by side, heat transfer fin is along the continuous punching press of flat sleeve pipe 1 'S length direction shaping corrugate structure of bending, including a plurality of crests and a plurality of trough of alternative arrangement to make and form continuous S type heat transfer passageway between two adjacent heat transfer fins, wherein, heat transfer fin' S upper and lower all welds with flat sleeve pipe 1 through brazed form, and fin group 2 two outsides is formed with gapped passageway 11 respectively between the fillet inner wall of flat sleeve pipe. The flow blocking device 3 is arranged at the air outlet end of the flat sleeve 1 and comprises two flow blocking parts which are respectively arranged at the clearance passages 11 on the two sides of the fin group 2 so as to reduce the flow area of the clearance passages 11, wherein the flow blocking parts are flow blocking baffles welded at the air outlet end of the flat sleeve 1 so as to reduce the flow area of the clearance passages 11 at the air outlet end of the flat sleeve 1.

In another embodiment, as shown in fig. 2, the flow blocking element is a flow blocking barrier welded to the air outlet end of the flat sleeve 1, and the flow blocking barrier penetrates through the flat sleeve along the gap channel, so that the flow blocking element reduces the flow area of the gap channel in the flat sleeve 1.

In another embodiment, as shown in fig. 3 and 4, the flat sleeve 1 includes a plurality of fin groups 2 arranged side by side from top to bottom to form an EGR cooler assembly, where the flow blocking element is an integral block or a stamping baffle installed at the air outlet end of the flat sleeve 1, and teeth are integrally formed on the flow blocking element, and the teeth of the flow blocking element extend into the gap channel 11 of the flat sleeve 1, so that the flow blocking element reduces the flow area of the gap channel at the air outlet end of the flat sleeve.

Preferably, the baffle bar, the integral block or the stamped baffle can be made of 316L, 304 or 444, and fixed in the flat sleeve 1 by brazing or argon arc welding.

The embodiment of the utility model provides a do not change at traditional heat transfer tube core size, under the little condition of structural change, it sets up choked flow device 3 to give vent to anger through at flat sleeve pipe 1 and hold, in order to reduce the flow area of welding back heat transfer fin and flat sleeve pipe 1 in R fillet department, thereby increase the flow resistance, the waste gas that makes fin group 2 in the heat transfer tube core of flowing through is more even, avoid waste gas to concentrate and pass through from clearance channel 11, not only satisfy essential heat transfer function, and can improve about 2% heat transfer performance, and increase in cost is less, the effect of little becoming increase has been realized.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A heat exchanger tube core for an EGR cooler, comprising: the heat exchange tube core of the EGR cooler comprises a flat sleeve, a fin group and a flow blocking device, wherein the inner face of each of two side walls of the flat sleeve is of a flat tube structure with an R round angle, one end of the flat sleeve is provided with an opening to form an air outlet end, the fin group is horizontally arranged in the flat sleeve and comprises a plurality of corrugated heat exchange fins arranged side by side, so that a continuous S-shaped heat exchange channel is formed between every two adjacent heat exchange fins, a clearance channel is formed between each heat exchange fin on the two outer sides of the fin group and the inner wall of the round angle of the flat sleeve respectively, the flow blocking device is arranged at the air outlet end of the flat sleeve and comprises two flow blocking parts arranged at the clearance channels on the two sides of the fin group respectively, and the flow area of the clearance channel is reduced.

2. The heat exchanger tube core of an EGR cooler of claim 1, wherein: the heat exchange fins are of a corrugated structure formed by continuous stamping and bending along the length direction of the flat sleeve and comprise a plurality of wave crests and a plurality of wave troughs which are alternately arranged.

3. The heat exchanger tube core of an EGR cooler of claim 1, wherein: the upper edge and the lower edge of the heat exchange fin are welded with the flat sleeve in a brazing mode.

4. The heat exchanger tube core of an EGR cooler of claim 1, wherein: the flow resisting piece is a flow resisting baffle welded at the air outlet end of the flat sleeve, and the flow resisting piece is used for reducing the flow area of the clearance channel at the air outlet end of the flat sleeve.

5. The heat exchanger tube core of an EGR cooler of claim 1, wherein: the flow blocking piece is a flow blocking barrier strip welded at the air outlet end of the flat sleeve, and the flow blocking barrier strip penetrates through the flat sleeve along the gap channel, so that the flow area of the gap channel is reduced in the flat sleeve by the flow blocking piece.

6. The heat exchanger tube core of an EGR cooler of claim 1, wherein: the flat sleeve is internally provided with a plurality of groups of fin groups which are arranged side by side from top to bottom.

7. The heat exchanger tube core of an EGR cooler of claim 6, wherein: the flow resisting piece is an integral check block or a stamping baffle arranged at the air outlet end of the flat sleeve, teeth are integrally formed on the flow resisting piece, the teeth of the flow resisting piece extend into the gap channel of the flat sleeve, and the flow area of the gap channel is reduced at the air outlet end of the flat sleeve by the flow resisting piece.