IMPELLER OF CENTRIFUGAL COMPRESSOR

摘要

Disclosed is an impeller of a centrifugal compressor, provided with full blades which are adjacent to one another and which extend from the inlet portion to the outlet portion for fluid, and splitter blades which are provided between the full blades and which extend from an intermediate portion to the outlet portion of a passage. The inlet portion of each splitter blade is shaped so as to be compatible with the complicated internal flow of a centrifugal compressor, and to attain equalization of flow distribution, a high pressure ratio, and a high efficiency. Front edge blade angles (?) at the inlet end portions of splitter blades (7) are made to differ in the height direction from a hub surface, and the tip portion of each splitter blade is inclined toward the negative-pressure surface side (Sb) of each full blade (5) at an inclination angle larger than the inclination angle of the portion of the splitter blade excluding the tip portion. The front edge blade angles (?) at the inlet end portions of splitter blades (7) are made to differ in the height direction from the hub surface, and the hub surface-side portion of each splitter blade is inclined toward the pressure surface side (Sa) of each full blade (5) at an inclination angle larger than the inclination angle of the portion of the splitter blade excluding the pressure surface-side portion.