Diagonal impeller for a diagonal fan, and diagonal fan

Abstract

A diagonal impeller for a diagonal fan ( 11 ), comprising a carrier plate ( 33 ) over the outer periphery of which a plurality of vanes ( 36 ) are distributed, wherein the vanes ( 36 ) have a leading edge ( 81 ) and a trailing edge ( 82 ), which are interconnected by outer edges ( 84 ) formed at the vane end ( 37 ), and the leading edge ( 81 ) and the trailing edge ( 82 ) extend in a manner directed radially outwardly and inclined upstream, wherein a vane face of the vane ( 36 ) is three-dimensionally twisted and the vane ( 36 ) is inclined in the direction of rotation relative to the meridian line, such that the leading edge ( 81 ) is oriented ahead of the trailing edge ( 82 ), and wherein an outer leading corner region ( 86 ) formed by the leading edge ( 81 ) and the outer edge ( 84 ) is inclined in an increased manner in the direction of rotation and/or a trailing corner region ( 88 ) formed between the trailing edge ( 82 ) and the outer edge ( 84 ) is inclined in an increased manner against the direction of rotation. (See FIG. 1 ).

1 . Diagonal impeller for a diagonal fan, comprising a carrier plate over the outer periphery of which a plurality of vanes are distributed, the vanes having a leading edge and a trailing edge, which are interconnected by outer edges formed at the vane end, and the leading edge and the trailing edge extending in a manner directed radially outwardly and inclined upstream, a vane face of the vane being three-dimensionally twisted and the vane being inclined in the direction of rotation relative to the meridian line, such that the leading edge is oriented ahead of the trailing edge, wherein an outer leading corner region formed by the leading edge and the outer edge is inclined in an increased manner in the direction of rotation and/or a trailing corner region formed between the trailing edge and the outer edge is inclined in an increased manner against the direction of rotation or an outer leading corner region formed by the leading edge and the outer edge is inclined in an increased manner in the direction of rotation and a trailing corner region formed between the trailing edge and the outer edge is inclined in an increased manner against the direction of rotation. 
     
     
         2 . Diagonal impeller according to  claim 1 , wherein the outer leading corner region is inclined over a region of less than a quarter of the length of the leading edge and the length of the outer edge. 
     
     
         3 . Diagonal impeller according to  claim 1 , wherein the outer trailing corner region is inclined over a region of less than a quarter of the length of the trailing edge and the length of the outer edge. 
     
     
         4 . Diagonal impeller according to  claim 1 , wherein the outer edge extends in a flat, sinusoidal manner starting from the leading edge as far as the trailing edge. 
     
     
         5 . Diagonal impeller according to  claim 1 , wherein the leading edge in the leading corner region and/or the trailing edge in the trailing corner region are aligned, at least over portions, in a plane practically perpendicular or in a plane perpendicular to the axis of rotation of the carrier plate. 
     
     
         6 . Diagonal impeller according to  claim 1 , wherein a corner region adjoining the trailing edge and arranged on a lateral surface of the carrier plate is curved in a direction opposite that of the outer trailing corner region. 
     
     
         7 . Diagonal fan for gaseous media, comprising a diagonal impeller, which has a carrier plate with a plurality of vanes arranged thereon, with a guide device following said diagonal impeller in a downstream direction to increase the pressure of the flow medium and with a cover plate, which surrounds the carrier plate in the radial direction and extends along the carrier plate, at least over portions, in the axial direction, wherein the diagonal impeller is designed according to  claim 1 .