Processing method of elliptical tube-fin heat exchanger

Abstract

The invention discloses a machining method of an oval tube fin heat exchanger. The machining method comprises the following steps that one end of an oval tube is subjected to flanging and chambering,and a chambering end is formed; the other end of the oval tube is subjected to necking-down, and a necking-down end is formed; a fin with an oval hole in the center is vertically arranged on the ovaltube in a sleeving manner through the necking-down end, a distance plate is arranged between every two fins, the long axis and the short axis of the oval hole in the center of each fin are larger thanthe long axis and the short axis of the oval tube by 0.15 to 0.35 mm; through a conversion tool, a mechanical tube expanding machine and the chamfering end are connected, the mechanical tube expanding machine pushes an oval expansion head to pass through the oval tube, the expansion amount of the oval tube reaches 0.25 to 0.85 mm; and the distance plates are disassembled, the chamfering end and the necking-down end are cut off, and the oval stainless steel tube fin heat exchanger is made.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, in particular to a processing method for an elliptical tube-fin heat exchanger. Background technique [0002] The main components of the heat exchanger are heat exchange tubes and fins, such as round tube fin heat exchangers and elliptical tube fin heat exchangers. High heat transfer efficiency and low air resistance. There are two processes for connecting the elliptical tubes and fins of the existing elliptical tube-fin heat exchangers: hot-dip galvanizing and aluminum plating, which have problems such as serious pollution, cumbersome procedures, and energy consumption to varying degrees. Especially limited by the process, the existing elliptical tubes can only use steel tubes, which are prone to slag during use, not only cannot be used in industries with high food safety requirements, but also have low heat transfer efficiency and high quality, which directly leads to the overall overw...

AI Technical Summary

Problems solved by technology

There are two methods of connection between the elliptical tube and the fin of the existing elliptical tube-fin heat exchanger, hot-dip galvanizing and aluminum plating, and there are problems such as serious pollution, cumbersome procedures, and energy consumption to varying degrees.

Especially limited by the process, the existing elliptical tubes can only use steel tubes, which are prone to slag during use, not only cannot be used in industries with high food safety requirements, but also have low heat transfer efficiency and high quality, which directly leads to the overall overweight of the heat exchanger

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