Method of making a connecting assembly of metallic heat exchanger tubes with a tube sheet of a waterbox.

摘要

In heat exchangers whose metallic heat exchanger tubes (4) are to be mounted and sealed in a tube sheet of a water box (1) by means of a transverse press fit connection, good results have been obtained to date only with heat exchangers in which the tube sheet (2) consists of metal. With tube sheets (2) consisting of plastic, use has so far been made of sealing rings for the purpose of sealing the tubes (4) in the tube sheet (2). A connecting assembly is therefore proposed for metallic tubes (4) of a heat exchanger having a tube sheet (2) of a water box (1), the ends (4') of the tubes (4) being mounted and sealed in openings (3) of the tube sheet (2) by a transverse press fit connection, and the tube sheet (2) consisting of a thermoplastic synthetic material which is an integral component of the water box (1). The mounting and sealing is performed by shrinking the tube sheet (2) onto the ends (4') of the tubes (4).