RADIAL BLOWER IMPELLER VANE Russian patent published in 2013 - IPC F04D29/30 

FIELD: machine building.

SUBSTANCE: vane flexed backward comprises surface consisting of first part bent in circular arc with radius Rv=0.55 D₂, and second straight part. The latter extends at a tangent to flexed first part at point b. This point is located at distance b=(0.05-0.055)D₂ from first part exit edge provided said part is continued. Vane exit angle between straight second part and tangent to impeller circle D₂ along second part exit edge makes 41-47 degrees and is ensured by selection of appropriate parameters Rv, Rc, D₂, where D₂ is impeller diameter, Rv is vane flexed part radius, Rc is radius of circle whereat vane curvature centres are located.

EFFECT: higher rated efficiency.

5 dwg