Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1992-09-01
1994-01-11
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
29463, 29890039, 228157, B23P 1506
Patent
active
052769666
ABSTRACT:
A method for manufacturing a studded flow channel (38) results in enhancing the heat transfer performance of a hydraulically expanded heat exchanger such as a coiled tube boiler (10). The studs are machined or rolled into a flat metal sheet (20) prior to forming a cylinder. One cylinder (28) is rolled so that the studs are located outside the cylinder while another embodiment positions the studs on the inside of a cylinder. The cylinders are positioned one inside the other and electron beam welded to form a helical weld path (16). A pressure fitting (34) is attached to the welded cylinder (36) and hydraulic pressure (P) is applied to deform the cylinders (28, 32) between the helical weld path thus creating a studded flow channel (38).
REFERENCES:
patent: 3147545 (1964-09-01), Valyi
patent: 3200480 (1965-08-01), Heuer
patent: 3201858 (1965-08-01), Valyi
patent: 3340589 (1967-09-01), Jaeger
patent: 3690140 (1972-09-01), Shive
patent: 3831246 (1974-08-01), Morris
patent: 5138765 (1992-08-01), Watson et al.
Grant George
Watson George B.
Cuda Irene
Edwards Robert J.
Kalka Daniel S.
Matas Vytas R.
The Babcock & Wilcox Company
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