IMPELLER OF A CENTRIFUGAL DOUBLE-SIDED FAN Russian patent published in 2021 - IPC F04D29/28 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering and can be used to in impellers of centrifugal double-sided fans designed for operation in dusty environments. The impeller of the centrifugal double-sided fan contains blades covering the disks, stiffening rings, a toothed central disk with interscapular cavities, one side of which, made in the form of a mating shape of the blade's working surface, is mated with the free side, which is made in the form of a parabola branch, along a circular arc The arc of a circle of conjugation of the sides of the cavity is made with a radius of r = 0.0088D₂, tangent to the circle D_i, concentric circle D₂, and to the side made in a shape corresponding to the shape of the working surface of the blade, where D₂ is the outer diameter of the impeller, D₀ is the diameter of the location of the input edge blades, concentric D₂, D_i - inner diameter of the cavity, taken (1.04-1.16)D₀, density of the blade lattice taken equal to (1.4-2.5), where l is the blade length, t_MD is the distance between the blades at the average diameter The peripheral part of the free side of the interscapular cavity on the outer diameter of the impeller D₂ is made at a distance α = 0.007D₂ from the back side of the blade.

EFFECT: invention improves an impeller of a centrifugal double-sided fan.

1 cl, 3 dwg