Centrifugal compressor impeller and turbosupercharger

The utility model provides a centrifugal compressor impeller and a turbosupercharger. The centrifugal compressor impeller comprises a blade. The wheel edge of an inlet guiding section of the blade is divided into a slope section, a transition section, a horizontal section and an elevating section, all of which are connected in sequence. The slope section has a certain slope. The transition section is gradually changed to be horizontal from the slope section in a transition mode. The horizontal section is kept horizontal. The elevating section is gradually elevated to a certain slope from the horizontal slope, on the part behind the inlet guiding section of the centrifugal compressor impeller, the slope of the wheel edge line of the blade is gradually increased to the slope value of a wheel edge outlet, the airflow circulation area near an inlet blade tip of the impeller is increased, the airflow radius is greatly changed, the airflow pressure rises, the pressure expanding capacity of the inlet guiding section of the blade is enhanced, the pressure ratio of a centrifugal compressor is high, meanwhile, the airflow circulation capacity of the centrifugal compressor is high, and the efficiency of the centrifugal compressor impeller is further improved.