Turbine rotor

  • US 8,596,982 B2
  • Filed: 06/23/2010
  • Issued: 12/03/2013
  • Est. Priority Date: 06/30/2009
  • Status: Active Grant
First Claim
Patent Images

1. A turbine rotor comprising:

  • a rotor shaft; and

    a rotor disc having a structure for fastening a turbine blade thereon;

    wherein the rotor disc is composed by at least two members of an outer rotor disc and an inner rotor disc, and the inner rotor disc and the outer rotor disc are integrated by welding via a weld metal part;

    wherein the outer rotor disc has cooling holes which penetrate the outer rotor disc in an axial direction of the rotor shaft; and

    wherein the cooling holes are arranged in a circumferential form, and the cooling holes arranged on an inner circumferential side have a diameter smaller than that of the cooling holes arranged on an outer circumferential side seen from an axis of the rotor shaft.

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