UPDATED AXIAL BLOWER Russian patent published in 2012 - IPC E21F1/08 F04D19/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to ventilation equipment, namely, to axial blower used for venting transport tunnels and subways. Updated blower comprises drive motor arranged in blower hub. Impeller with all-welded fixed double S-like laminated vanes is fitted on motor shaft in second-stage plane. Note here that shape of every vane at whatever distance in blade radius is defined by parameters x_c, x_f, f₁ f₂ and b, where: x_c is distance from vane front edge to inflection of its center line, x_f is distance from vane front edge to maximum inflection of front part center line, f₁ is maximum flexure of vane rear center line, f₂ is maximum flexure of vane front center line, b is vane length from front to rear edges. Note also that vane center line is described by continuous piecewise smooth function in four intervals.

EFFECT: longer life, higher efficiency.

4 dwg