Profiled Blade, Fan Wheel and Method for Producing a Profiled Blade

Abstract

Profiled blade for a fan wheel, with a profile body produced from at least one curved metal strip, whereby adjacent end zones of the at least one metal strip are connected to each other in an adhesively bonded and/or form-fit manner wherein a second end zone at a distance from a second end zone edge is equipped with at least one embossed area for forming a contact surface enabling a first end zone to, at least in sections, be brought into contact with it.

What is claimed is: 
     
         1 . A profiled blade for a fan wheel, comprising:
 a profile body made from at least one curved metal strip,   wherein adjacent first and second end zones of the least one metal strip are connected in an adhesively bonded and/or form-fit manner to each other, and   wherein the second end zone is equipped with at least one embossed area at a distance from a second end zone edge for the formation of a contact surface to enable an at least partial contact with the first end zone.   
     
     
         2 . The profiled blade according to  claim 1 , wherein a first end zone edge of the first end zone is arranged at a distance from a second end zone edge of the second end zone and that the first end zone edge is fixed on an upper side of the second end zone facing towards the first end zone. 
     
     
         3 . The profiled blade according to  claim 2 , wherein the profile body includes a first profiled part, a second profiled part, and a sleeve-shaped, highly curved leading edge, the first profiled part enclosing the first end zone and being connected to the sleeve-shaped, highly curved leading edge, the sleeve-shaped, highly curved leading edge being connected to the second profiled part, which ends at the second end zone. 
     
     
         4 . The profiled blade according to  claim 3 , wherein the leading edge has a convexly curved outer surface and/or the first profiled part has a convexly curved outer surface and/or the second profiled part has a concavely curved outer surface. 
     
     
         5 . The profiled blade according to  claim 3 , wherein the first profiled part and/or the second profiled part are plate-shaped. 
     
     
         6 . The profiled blade according to  claim 1 , wherein the embossed area is shaped as corrugation and is located at a distance from the second end zone edge. 
     
     
         7 . The profiled blade according to  claim 1 , wherein the embossed area protrudes from the upper side of the second end zone. 
     
     
         8 . The profiled blade according to  claim 7 , wherein the embossed area has an L-shaped profile. 
     
     
         9 . The profiled blade according to  claim 1 , wherein the embossed area is recessed in the upper side of the second end zone. 
     
     
         10 . The profiled blade according to  claim 9 , wherein the embossed area has an L-shaped profile. 
     
     
         11 . The profiled blade according to  claim 1 , wherein the profile body is designed open on the front side and/or is formed from precisely one one-piece, bent metal strip. 
     
     
         12 . The profiled blade according to  claim 1 , wherein the first end zone edge is welded and/or glued to the upper side of the second end zone facing towards the first end zone. 
     
     
         13 . A fan wheel for transporting a gaseous fluid, comprising:
 a disc-shaped round plate arranged coaxially with an axis of rotation and comprising a hub arrangement;   a ring arranged coaxially with the axis of rotation and at a distance from the round plate; and   a plurality of profiled blades according to  claim 1  arranged in a pre-settable angular division in a ring-shaped spatial volume around the axis of rotation, fixed with axial, opposing faces on the round plate and on the ring.   
     
     
         14 . The fan wheel according to  claim 13 , wherein the profiled blades each have a leading edge arranged radially inward in the ring-shaped spatial volume and first end zones and second end zones arranged radially outward in the ring-shaped spatial volume. 
     
     
         15 . A method for producing a profiled blade, the method comprising:
 supplying a metal strip to an embossing device;   carrying out an embossing process to emboss an embossed area into a second end zone of the metal strip;   supplying the embossed metal strip to a metal forming device and deforming the metal strip to form a leading edge, a first profiled part and a second profiled part;   bringing into contact a first end zone edge of a first end zone with an upper side of the second end zone facing towards the first end zone; and   connecting the first end zone edge to the upper side of the second end zone by adhesive bonding.   
     
     
         16 . The method according to  claim 15 , wherein the embossing process comprises performing deformation of the metal strip and/or a separation process for separating the metal strip from a metal sheet. 
     
     
         17 . The method according to  claim 15 , wherein the first end zone edge is welded to the upper side of the second end zone and profiled blades formed thereby are each welded on the front side to a disc-shaped round plate and to a ring arranged coaxially to and at a distance from the round plate, in each case along a profile outer edge going all the way around.