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TURBINE ROTOR

  • US 3,873,234 A
  • Filed: 11/06/1972
  • Issued: 03/25/1975
  • Est. Priority Date: 11/10/1971
  • Status: Expired due to Term
First Claim
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1. A turbine rotor comprising a hub and a plurality of blades formed separately of the hub and arranged circumferentially around the periphery of the hub, each blade having a root end in the form of a hollow box including a radially-outer wall forming a platform from which the blade extends, a radially-inner wall which abuts the periphery of the hub and is directly attached thereto, and radially-extending walls at each axial end of the box, the box having an internal wall interconnecting the radially-inner and radially-outer walls, and the radiallyextending walls at each axial end of the box, thereby dividing the box into two compartments, each open at the relevant circumferentially outer end of the box and at least some of the blades each having at least one passage therein extending from the interior of the box of the root end of the blade through the radially-outer wall forming the platform to a radially-outer part of the blade, the circumferential ends of the box-like roots of adjacent blades being spaced apart circumferentially to form spaces through which coolant can be introduced into the compartments of the box-like roots.

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