Numerical controlled process of baffles on helix-baffled tubular heat exchangers

Key words:  beflle-plate  hedix-baffled tubular heat excha?ger  numerical controlled process

Abstract:

The helix-bafiled tubular exchanger is more efficiency in heat transfer than general exchangers, but the helix baf-fled-stmcture is tod difficult to be fabricated, which is the main reason why it can't be us?d in plant- The baffles installed in the shell are not peTpendicular to ike tube，that is，the axis of the hole on the plate is not perpendicular Lo the baffled surface ，but forms into a definite angle. The baffles are very difficult Lo be manufactured using common machine tools. Aimed al heat exchanger with two courses ia tube side，one baffle was split into four parts. The tube holes_distribution on baffles was analyzed, and the mathematical model was developed Numerical controlled program was compiled with EIA code. The baffles were welded into a pile, then the holes were drilled using milling cutter and twist drill. Tho baflles were installed on Mitsubishi numerical controlled machine, and numerical controlled process was realized. This can improve production efficiency, which makes it possible that helix-baffled tubular heat exchangers can be widely applied in factory.