CENTRIFUGAL STAGE OF COMPRESSOR Russian patent published in 1999 - IPC

FIELD: compressors. SUBSTANCE: centrifugal stage of compressor has impeller with cover disk, radially mounted blades, axial flow inlet at blade inlet angles of from 30 to 40 deg and blade outlet angles of from 30 to 35 deg and rotating guiding device with blades mounted in axial portion of stage between cover disk and bush. Blades of rotating guiding device have similar angles of inclination in different sections in height between center line of blade and circumferential direction at inlet and outlet of rotating guiding device. Blades of rotating guiding device are set by trailing edges at boundary of curvilinear bladeless section of impeller where flow turns from axial to radial direction. EFFECT: improved strength characteristics of impellers at rather high tip speeds. 2 dwg