Lateral-duct fan

Details Lateral-duct fan Lateral-duct fan

1982-12-28

1984-05-08

Marcus, Stephen

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Cross flow runner

415213T, 415170A, 415 53T, F04D 2934

Patent

active

044471874

ABSTRACT:
A lateral-duct fan having a lateral duct approximately of the shape of a torus cut normally to its axis of symmetry, and having a coaxial impeller having axially-symmetrically lined-up blades at its front side in a ring-shaped recess that faces essentially opposite the lateral duct with an axial gap therebetween. In order to reduce the critical interdependence between the size of the axial gap and the output of the fan, and thus increase the tolerances during the adjustment of the axial gap, i.e., to improve the output values of the fan with the same axial gap, it is provided that the radius of at least one edge of the recess, measured at the front side of the impeller, is smaller than the radius of a closest edge of the lateral duct, measured at an inner surface of a housing in which the lateral duct is formed.

REFERENCES:
patent: 3871797 (1975-03-01), Igarashi
patent: 4152096 (1979-05-01), Murakami
patent: 4231718 (1980-11-01), Ruhl

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