| 摘要 |
<p>[PROBLEM TO BE SOLVED] A bellows type mechanical seal is provided which is able to improve corrosion resistance of a bellows assembly in which a retainer, a bellows and a collar are integrally welded and fixed to one another, without limiting materials to be used. [MEANS FOR SOLUTION] A bellows type mechanical seal is provided with a seal ring (30) and a mating ring (40), wherein one of the seal ring (30) and the mating ring (40) is supported by a housing (50), and the other thereof is supported on a rotating shaft (60) so as to rotate together with the rotating shaft (60), the seal ring (30) being supported through a bellows (21), and the bellows (21) being constructed as a bellows assembly (20) of an integral structure in which a retainer for holding the seal ring (30) is welded and fixed to one end of the bellows and a collar (23) is welded and fixed to the other end of the bellows, and wherein the entire surface of the bellows assembly (20) after the bellows (21), the retainer (22) and the collar (23) are welded to one another is covered with an anti-corrosion coating formed by means of a physical vapor deposition method such as ion plating.</p> |
