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Mixed flow turbine

  • US 8,128,356 B2
  • Filed: 02/10/2009
  • Issued: 03/06/2012
  • Est. Priority Date: 05/20/2008
  • Status: Active Grant
First Claim
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1. A mixed flow turbine comprising:

  • mixed flow turbine moving blades having inlet-side edges located at an upstream side is formed in a convex shape toward the upstream side; and

    a scroll that is a space formed upstream of the mixed flow turbine moving blades by a casing having a shroud that covers the radially external edges of the mixed flow turbine moving blades, the space being for supplying working fluid toward the inlet-side edges of the mixed flow turbine moving blades,wherein the scroll is separated by a scroll partition wall into a shroud-side space and a hub-side space; and

    wherein a shroud-side partition wall surface and a hub-side partition wall surface at the rear edge side of the scroll partition wall form a shroud-side inlet channel in which the working fluid flows substantially radially and a hub-side inlet channel in which the working fluid flows substantially in the same direction as the inclination direction of a hub circumferential surface at the inlet of the mixed flow turbine moving blades between the partition wall surfaces and portions facing the partition wall surfaces, respectively, wherein the hub-side inlet channel is provided with a hub-side blade-shaped nozzle whose blade surfaces are formed substantially parallel to a rotation axis.

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