| 摘要 |
FIELD: instrument making.SUBSTANCE: present invention relates to an impeller. A fan blade has on its radial length at least similar profile sections profile when a cylinder cross-section is viewed through fan blades. Radially outermost profile section which lies in cylindrical envelope of surface of impeller has, with respect to adjacent profile section, a larger displacement than said adjacent profile section has relative to its adjacent profile section. Impeller may also, on radially outer edge, be provided with at least one protruding flow element, axial height of which, in region of leading edge and trailing edge of fan blade, is greatest.EFFECT: impeller has a simpler design and generates less noise during operation of fan.30 cl, 11 dwg |
