| 摘要 |
PURPOSE:To prevent stress corrosion cracking of core plates effectively, by using an I-ring as an elastic seal member, and sealing the interface between the core plates and a tank in a reliable manner without rendering the peak value of pressure at the contact surface too high. CONSTITUTION:A radiator of this invention comprises a metal core section 1 including corrugated fins 7 of copper and brass tubes 8. In assembling the radiator, a coupling portion 10 formed at the marginal portion of a tank 2 is fitted into a groove 20. Here, the inner and the outer side wall surfaces 13, 14 of the coupling portion 10 are respectively held in engagement with the inner and the outer side walls 17, 18 of the groove 20, and an elastic seal member 30 is interposed between the inner work surface 11 of the coupling portion 10 and the inner surface of the bottom wall 19 of the groove 20. The elastic seal member 30 is shaped in the form of a packing (I-ring) having a recess 30a curved smoothly in the side faces A of its rectangular cross section, and the interface is sealed by compressing the I-ring 30 to a prescribed compression ratio (8-40%). |
