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, which includes a heat exchanger core and a head. The heat exchanger core is stacked and cross-flow arranged with several layers of hot passages and several layers of cold passages, and is sandwiched by cover plates. Brazed and brazed, the hot channel is a layer of fins sandwiched between two layers of partitions and sealed by a rectangular seal, the cold channel is a layer of fins sandwiched between two layers of partitions and sealed by a flexible seal; the head is in the shape of a semicircular groove , the outer side of the head is a circular tube joint; after the entire plate-fin heat exchanger is processed, a rectangular stress relief joint is opened on the cover plate according to the length of the cover plates on both sides of the heat exchanger core through size calculation. The novel plate-fin heat exchanger of the present invention adopts a flexible seal structure with stress relief grooves and a cover plate with stress relief seams, which not only reduces the weight of the heat exchanger, but also greatly reduces the stress relief effects of the two flexible structures. The thermal stress is reduced, effectively avoiding the fatigue failure of the heat exchanger due to thermal stress in actual work, and improving the fatigue life of the heat exchanger.

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 ki

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