Process for the production of an evaporator tube

Details Process for the production of an evaporator tube Process for the production of an evaporator tube

1998-12-16

2000-05-30

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

2989005, B21D 5306

Patent

active

060678321

ABSTRACT:
A process for producing a heat exchanger tube (1) with a highly porous surface structure, in particular for evaporating liquids from pure substances or mixtures on the outside of the tube. The process starts from a rolling operation, by means of which helical fins (2) are produced on the outside of the tube, which fins, in turn, are deformed in a plurality of compression steps by means of gearwheel-like compression wheels (6, 7) in such a manner that the projections (12a, 12b) formed in each case form a cover (3a) for the passages (3) which are situated between the fins (2). The high level of porosity is achieved as a result of the remaining pores (13) and/or slots (14).

REFERENCES:
patent: 1865575 (1932-07-01), Locke
patent: 3327512 (1967-06-01), Novak et al.
patent: 3696861 (1972-10-01), Webb
patent: 4216826 (1980-08-01), Fujikake
patent: 4577381 (1986-03-01), Sato et al.
patent: 4660630 (1987-04-01), Cunningham et al.
patent: 5054548 (1991-10-01), Zohler
patent: 5697430 (1997-12-01), Thors et al.

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