Turbine wheel
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTakao Yokoyama, Katsuyuki Osako, Toyotaka Yoshida, Motoki Ebisu
Life of this patent
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Abstract
A turbine wheel includes a plurality of blades having a scallop cut-out profile. The scallop cut-out profile is formed by cutting-out a back side wall part of the blade between the suction surface side of a blade part and the pressure surface side of the adjacent blade.
Claims12
A turbine wheel that comprises a plurality of blades being formed in a scallop shape by cutting-out a back plate side of the blades between a suction surface of a blade and a pressure surface of the adjacent blade, wherein
- a suction surface side extended part is formed along a tip end part of the scallop shape in the radial direction so as to extend the width of the scallop shape toward the suction surface beyond the thickness of the blades, and
- the extended width of the suction surface side extended part is set in a range from 1/20 to ⅓ of a pitch which is a distance between adjacent blades at the approximately 90% height of the scallop shape.
A turbine wheel that comprises a plurality of blades being formed in a scallop shape by cutting-out a back plate side of the blades between a suction surface of a blade and a pressure surface of the adjacent blade, wherein
- a pressure surface side extended part is formed along a tip end part of the scallop shape in the radial direction so as to extend the width of the scallop shape toward the pressure surface beyond the thickness of the blades, and
- the extended width of the pressure surface side extended part is set in a range from 1/20 to ⅓ of a pitch which is a distance between adjacent blades at the approximately 90% height of the scallop shape.
A turbine wheel that comprises a plurality of blades being formed in a scallop shape by cutting-out a back plate side of the blades between a suction surface of a blade and a pressure surface of the adjacent blade, wherein
- a pressure surface side extended part and an suction surface side extended part are formed along a tip end part of the scallop shape in the radial direction so as to extend the width of the scallop shape toward the pressure surface and the suction surface beyond the thickness of the blades, respectively, and
- the extended width of the pressure surface side extended part or the suction surface side extended part is set in a range from 1/20 to ⅓ of a pitch which is a distance between adjacent blades at the approximately 90% height of the scallop shape.
Dependencies are inferred from the claim text.