| 摘要 |
PURPOSE: To prevent the generation of cracks, the decrease of strength and reduce a cost, by including a layer of elastic material in an end member which is held between two rigid plates, and suppressing the elastic material between the outer peripheral surfaces of tubes in openings and a peripheral suppressing surface by two plates against expansion due to an expanding agent. CONSTITUTION: The ends of tubes 2 housed in a tubular shell 1 are held in the openings of an end member 3. The end member 3 includes an elastic material 4 held between two rigid metal plates 5 and 6. Upon assembly of a heat exchanger, petroleum base oil is contained therein, passes through the openings of the plates 5 and 6, the peripheries of the tubes 2 and leaks into a clearance 13. The elastic material begins to expand. However, its expansion is prevented by the rigid plates 5 and 6, the inner peripheral suppressing surface 20 of the shell 1 and the outer peripheral surfaces of the ends of the tubes 2 so that the elastic material is compressed to form seal parts between the end member 3 and the shell 1 and at the end parts of the tubes 2. |
