Cross-flow type aluminum plate fin heat exchanger provided with stress releasing seams, based on flexible seal strips and cover plates

Abstract

The invention discloses a plate-fin heat exchanger. The plate-fin heat exchanger comprises a heat exchanger core body and end caps, wherein a plurality of layers of hot channels and a plurality of layers of cold channels are stacked in cross-flow arrangement and are clamped by cover plates for brazing, so that the heat exchanger core body is formed; each hot channel is characterized in that one layer of fins is clamped by two layers of partition plates, and is sealed by rectangular seal strips; each cold channel is characterized in that one layer of fins is clamped by two layers of partition plates, and is sealed by flexible seal strips; each end cap is in a semi-circular slot shape; a round-tube-shaped joint is arranged on the outer side of each end cap; and after processing of the whole plate-fin heat exchanger is completed, rectangular stress releasing seams are formed in each cover plate through size calculation according to the length of the cover plate on each of two sides of the heat exchanger core body. According to the novel plate-fin heat exchanger disclosed by the invention, the flexible seal strips provided with stress releasing slots and the cover plates provided with the stress releasing seams are adopted, so that the weight of the heat exchanger is reduced; and through the combination of stress releasing effects of two flexible structures, heat stress is greatly reduced, so that the condition that in the actual operation of the heat exchanger, fatigue failure caused by heat stress is effectively avoided, and the fatigue life of the heat exchanger is prolonged.

Description

technical field [0001] The invention relates to a novel cross-flow aluminum plate-fin heat exchanger, in particular to a novel aluminum plate-fin heat exchanger which utilizes a flexible seal structure combined with a stress relief seam opened on a cover plate to greatly reduce thermal stress. Background technique [0002] As an efficient and compact heat exchange equipment, plate-fin heat exchanger is widely used in petrochemical, energy power, metallurgy, refrigeration and other industries, and is one of the most advanced heat exchange equipment at present. Due to the heat exchange characteristics of the cross-flow aluminum plate-fin heat exchanger, it is often used as air-cooled heat exchange equipment in various industries, such as surface coolers in refrigeration systems, and air-cooled air-cooled heat exchangers in petroleum refining and chemical industries. The oil cooler of construction machinery, oil cooler of compressor, intercooler, after cooler, etc. This kind of...

AI Technical Summary

Problems solved by technology

Due to the heat exchange characteristics of the cross-flow aluminum plate-fin heat exchanger, it is often used as air-cooled heat exchange equipment in various industries, such as surface coolers in refrigeration systems, and air-cooled air-cooled heat exchangers in petroleum refining and chemical industries. The oil cooler of construction machinery, oil cooler of compressor, intercooler, after cooler, etc. This kind of cross-flow plate-fin heat exchanger often works in the alternating working environment of cold and hot, and the difference in temperature causes The difference in the structural deformation of the plate-fin heat exchanger leads to thermal stress, and the periodic change of thermal stress will cause fatigue failure of the heat exchanger, seriously affecting industrial production efficiency and personnel safety

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