CENTRIFUGAL BLOWER CASING DIFFUSER ASSEMBLING METHOD

摘要

PURPOSE:In assembling method of the casing and diffuser for a large centrifugal blower, to eliminate the welding distorsion to be produced when welding the casing to the diffuser by welding the upper and lower diffusers while restricting each other. CONSTITUTION:A lower diffuser 3 is contained in a lower casing 1 then a restricting tool 6 is welded to the partition wall 5 of the lower diffuser 3. An upper diffuser is also contained in an upper casing then they are combined while being contained to fit the butting edge of upper diffuser to a restricting tool 6 thus to restrict the upper and lower diffusers each other through said tool 6. Thereafter the diffuser and casing are welded and assembled. Since the upper and lower diffusers are restricted each other through welding of the diffuser and casing, the butting face of upper and lower diffusers is never shifted due to the welding distorsion. The casing can be welded from the inside.