Profiled Blade and Fan Impeller

Abstract

A profiled blade for a fan impeller comprising a profiled body produced from at least one bent sheet metal strip. The profiled body includes a profile top part with a convex curvature, a profile bottom part located at a distance from the profile top part, and first and second profile noses. Each of the profile noses has a convex curvature and joins the profile top part to the profile bottom part at ends of the profiled body. The profile top part and/or the profile bottom part is divided into at least first and second profile sections. The first profile section is joined to the first profile nose and the second profile section is joined to the second profile nose. A first free end region of the first profile section is joined to a second free end region of the second profile section by adhesive force.

What is claimed is: 
     
         1 . A profiled blade for a fan impeller, comprising:
 a profiled body produced from at least one bent sheet metal strip, the profiled body comprising:
 a profile top part with a convex curvature; 
 a profile bottom part located at a distance from the profile top part; and 
 first and second profile noses each having a convex curvature and joining the profile top part to the profile bottom part at ends of the profiled body, 
   wherein at least one of the profile top part or the profile bottom part is divided into at least first and second profile sections, wherein the first profile section is joined to the first profile nose and the second profile section is joined to the second profile nose, and wherein a first free end region of the first profile section is joined to a second free end region of the second profile section by adhesive force.   
     
     
         2 . The profiled blade according to  claim 1 , wherein a free end of at least one profile section is angled relative to the profile top part and the profile bottom part and located between the profile top part and the profile bottom part. 
     
     
         3 . The profiled blade according to  claim 1 , wherein a free end region of a profile section is in planar contact with a contact surface of another profile section, the contact surface being strip-shaped and offset against a surface of the profiled body. 
     
     
         4 . The profiled blade according to  claim 3 , wherein the contact surface is oriented parallel to the surface of the profiled body. 
     
     
         5 . The profiled blade according to  claim 1 , wherein the angled free end region of the at least one profile section joins the profile top part to the profile bottom part. 
     
     
         6 . The profiled blade according to  claim 1 , wherein the profile bottom part has a concave curvature and/or the profile bottom part has at least two profile sections. 
     
     
         7 . The profiled blade according to  claim 1 , wherein at least one of the free end regions is additionally joined by adhesive force to the profile bottom part or the profile top part or to a profile element. 
     
     
         8 . The profiled blade according to  claim 1 , wherein the profiled body is formed from precisely one sheet metal strip. 
     
     
         9 . The profiled blade according to  claim 1 , wherein both the first and second profile sections of the profile top part or the profile bottom part have a free end region, which is angled relative to the profile top part and the profile bottom part and which extends between the profile top part and the profile bottom part. 
     
     
         10 . The profiled blade according to  claim 9 , wherein each of the angled free end regions of the profile sections has a strip-shaped contact surface which is offset against a surface of the profiled body, and wherein a profile element joins adjacent contact surfaces and in some regions defines the surface of the profiled body. 
     
     
         11 . A fan impeller, comprising:
 a disc-shaped circular blank arranged coaxially with an axis of rotation and comprising a hub assembly;   a ring arranged coaxially with the axis of rotation and at a distance from the circular blank; and   a plurality of profiled blades fixed to the circular blank and to the ring with axially opposite end faces, each of the profiled blades having a profiled body produced from at least one bent sheet metal strip, the profiled body comprising:
 a profile top part with a convex curvature; 
 a profile bottom part located at a distance from the profile top part; and 
 first and second profile noses each having a convex curvature and joining the profile top part to the profile bottom part at ends of the profiled body, 
   wherein at least one of the profile top part or the profile bottom part is divided into at least first and second profile sections, wherein the first profile section is joined to the first profile nose and the second profile section is joined to the second profile nose, and wherein a first free end region of the first profile section is joined to a second free end region of the second profile section by adhesive force.