Radial turbine wheel structure

Abstract

A radial turbine wheel structure comprises a wheel disc, a plurality of full blades and a plurality of splitting blades. The splitting blades are disposed equidistantly around the wheel disc and are alternately disposed with the full blades. Wherein each of inlet shrouds, outlet shrouds, inlet hubs and outlet hubs separately has an included angle to a meridian plane of the wheel disc, and the full blades are related to the splitting blades in length. Hence, the radial turbine wheel is applied to the gas turbine generator set to increase the electricity generation efficiency of the gas turbine generator.

1 . A radial turbine wheel structure, comprising:
 a wheel disc;   a plurality of full blades equidistantly disposed around the wheel disc; and   a plurality of splitting blades equidistantly disposed around the wheel disc and alternately disposed with the full blades;   wherein each shroud inlet angle of the full blades is 9.5 to 10.5 degrees, each shroud outlet angle of the full blades is 59.5 to 60.5 degrees, each hub inlet angle of the full blades is 1 to 2 degrees and each hub outlet angle of the full blades is 36.9 to 37.9 degrees; the proportion between each shroud outlet radius of the splitting blades and each shroud outlet radius of the full blades is 0.72 to 0.74, the proportion between each hub outlet radius of the splitting blades and each shroud outlet radius of the full blades is 0.29 to 0.31, the proportion between each shroud outlet axial length of the splitting blades and each shroud outlet axial length of the full blades is 0.66 to 0.68 and the proportion between each hub outlet axial length of the splitting blades and each shroud outlet axial length of the full blades is 0.73 to 0.75.   
   
   
       2 . The radial turbine wheel structure as in  claim 1 , wherein the numbers of the full blades and the splitting blades are both eight. 
   
   
       3 . The radial turbine wheel structure as in  claim 1 , wherein the shroud outlet angle is an included angle between an outlet shroud and a meridian plane of the wheel disc, the shroud inlet angle is an included angle between an inlet shroud and the meridian plane of the wheel disc, the hub outlet angle is an included angle between an outlet hub and the meridian plane of the wheel disc and the hub inlet angle is an included angle between an inlet hub and the meridian plane of the wheel disc. 
   
   
       4 . The radial turbine wheel structure as in  claim 1 , wherein the best proportion between each shroud outlet radius of the splitting blades and each shroud outlet radius of the full blades is 0.730 to 0.732. 
   
   
       5 . The radial turbine wheel structure as in  claim 1 , wherein the best proportion between each hub outlet radius of the splitting blades and each hub outlet radius of the full blades is 0.304 to 0.306.