Compact and efficient heat exchanger core and welding fixture thereof

Abstract

The invention discloses a compact and efficient heat exchanger core. The compact and efficient heat exchanger core comprises an upper metal cover plate, a lower metal cover plate and a plurality of intermediate metal plates, wherein first semi-circular hole structures are longitudinally and second semi-circular hole structures are transversely etched in the bottom surface of the upper metal cover plate, the top surface of the lower metal cover plate and the top and bottom surfaces of the intermediate metal plates, and the upper metal cover plate, the intermediate metal plates and the lower metal cover plate are sequentially stacked up and down; and the first semi-circular hole structures and the second semi-circular hole structures between the upper and lower adjacent intermediate metal plates, between the uppermost intermediate metal plate and the upper metal cover plate, and between the lowermost intermediate metal plate and the lower metal cover plate are correspondingly combined to form first round holes and second round holes correspondingly. The transversely and longitudinally chemically etched semi-circular hole structures are adopted, so that the boundary layer breakage capability is very strong, the flow disturbance can be enhanced, the heat exchange performance is improved, and the compact and efficient heat exchanger core is suitable for special occasions.

Description

technical field [0001] The invention relates to a compact heat exchanger core with high temperature and high pressure resistance and high heat exchange performance, which can be used in petrochemical, aerospace, gas turbine and other fields, and an integrated assembly and welding tooling thereof. Background technique [0002] Compact and high-efficiency heat exchangers are widely used in petrochemical, automobile manufacturing and other fields. In a special service environment, such as a high-temperature gas-cooled reactor, the service temperature of the heat exchanger reaches about 600°C, and the pressure reaches about 7MPa. It also needs to withstand cyclic thermal stress, and has high heat transfer performance and compactness. These requirements limit The use of compact and high-efficiency heat exchangers in similar harsh conditions. The plate-fin heat exchanger is formed by superimposed brazing, and has limited high-temperature and high-pressure service capacity, while ...

AI Technical Summary

Problems solved by technology

The brazing tooling of plate-fin heat exchangers is generally pre-tightened by springs or bolts, but for stainless steel diffusion-welded printed circuit board heat exchangers, at a welding temperature of about 1120°C, the springs or bolts will be released due to stress relaxation and cannot Satisfy the pressure requirement of diffusion welding, if it is serious, it will cause the misalignment of the heat exchange plate and reduce the yield

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