DIFFUSER FOR A CENTRIFUGAL COMPRESSOR

摘要

In a diffuser (4) for a centrifugal compressor of the type which includes an impeller (3) rotatably provided on the downstream side of the suction casing (2) and a plurality of radial stator blades (5) arranged tangentially with respect to the impeller (3), auxiliary blades (11) are provided between the impeller (3) and the stator blades (5), the auxiliary blades (11) having a chord length smaller to that of the stator blades (5) and being slidable in the axial direction of the impeller (3). Further, the auxiliary blades (11) are connected to devices (12 to 16) designed to move them in the axial direction.