Supporting structure for improving thermal fatigue resistance of EGR cooler

Abstract

The invention discloses a supporting structure for improving thermal fatigue resistance of an EGR cooler. The supporting structure comprises two mounting plates, a plurality of heat exchange units are arranged between the two mounting plates, the plurality of heat exchange units are formed by heat exchange core bodies, a plurality of heat exchange core bodies are overlapped to form one heat exchange unit, and supporting plates sleeve the peripheries of the heat exchange units formed by the multiple heat exchange core bodies at intervals, outer edge protruding blocks are arranged at the top and the bottom of each supporting plate, each outer edge protruding block is sleeved with a supporting block, the supporting blocks are attached to the outer surfaces of the heat exchange units, a shell is arranged on the peripheries of the two mounting plates, and the shell wraps the multiple heat exchange units. The supporting structure can solve the problems that an existing EGR cooler thermal fatigue resistance device occupies the space of heat exchange units, the heat exchange efficiency of the EGR cooler is affected, the thermal fatigue resistance is poor, universality is poor, and the product cost is increased.

Description

technical field [0001] The invention relates to a support structure for improving the thermal fatigue resistance of an EGR cooler, which belongs to the technical field of internal combustion engines. Background technique [0002] The position of EGR technology in medium and heavy-duty engines has become increasingly important. Compared with light-duty engines, medium- and heavy-duty engines have a large exhaust gas flow, which requires the EGR cooler to have a higher heat transfer rate, which greatly increases the volume of the cooler. The heat unit is long, and when the cooler is working, the cooler will be affected by fatigue thermal shock, which will easily cause cracks at the welding seam between the main board at both ends and the end of the heat exchange unit or bending and fracture of the heat exchange unit, seriously affecting EGR cooling device reliability. [0003] There are currently two solutions. One is to add bellows to the intake end of the EGR cooler to comp...

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a support structure for improving the thermal fatigue resistance of the EGR cooler, so as to solve the problem that the existing EGR cooler thermal fatigue resistance device occupies the space of the heat exchange unit and affects the heat transfer of the EGR cooler. Efficiency, poor thermal fatigue resistance, poor versatility and resulting in rising product costs

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