Method of manufacturing baffles for shell and tube type heat exchangers

• Main Authors: YUSA; TSUNERO, SHIBUYA; HISAO
• Format: Patent
• Language: English
• Published: 06.10.1987
• Edition: 4
• Subjects: BLASTING; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT EXCHANGE IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WEAPONS; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

A helical baffle for shell and tube type heat exchangers is fabricated by stamp forming a plate in the form of a partial circular section into a helical section between opposed, mating helically-shaped faces of two forming dies. The plate contains a series of apertures in the form of a pattern for receiving heat exchanger tubes. The dies contain sleeves and opposed reaming rods which form lips on the apertures during stamping of the plate. Lips can also be formed on the outer edge of the plate and the edge of a central passage during stamping. The lips prevent the helical plate from twisting or returning to a flat configuration. The leading and trailing edge of the helical plates are then joined such as by rivetting or welding into a continuous helical baffle with sets of heat exchanger tube apertures aligned along a common axis.