TURBO MACHINE

摘要

PURPOSE: To reduce radiation sounds from a body surface, piping, cover or the like by constructing integrally a diffuser side plate, diffuser blade and backboard blade, providing separately a stage and transmitting a vibrational force from the diffuser blade and backboard blade through a fitting part of the diffuser side plate and stage to the stage without transmitting the vibrational force directly to the stage. CONSTITUTION: A casing 5 receives a blade 4a of a diffuser 4, side plates 4b and back board blade 2 of both sides thereof made integrally and an annular stage 3 separately attached, so that the fitting part of the casing and stage through which a vibrational force is transmitted is reduced to a portion of the diffuser side plate 4b and stage 3. While the vibrating force of fluid discharged from a blade 7a of an impeller 7 to act on the blade 4a of the diffuser 4 is transmitted from the diffuser side plate 4b to the stage 3, the vibrational force is damped at the fitting part. Thus, the fluid performance is not little affected and radiation sounds from the body surface, piping, coupling cover or the like of a turbo-fluid machine body can be economically effectively reduced.