Impeller for axial fan, has profile body including concave and convex mantle areas with form for forming pressure side and flow side for impeller vane, where form is produced in molded tool-based cold deformation process
摘要
<p>The impeller has a polygon hub provided on an output shaft (16) of a drive motor (12), in a torque-proof manner. An impeller vane (26) is detachably fastened to facets of the hub. The form of concave and convex mantle areas of a profile body forming a pressure side and a flow side for the impeller vane is produced in a molded tool-based cold deformation process. The form allows achievement of parts formed under initial load by tension release following deformation of the form. A hollow body of the impeller vane is made under formation in a deep-drawing process.</p>
