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Title: Multiple piece turbine rotor blade

A spar and shell turbine rotor blade with a spar and a tip cap formed as a single piece, the spar includes a bottom end with dovetail or fir tree slots that engage with slots on a top end of a root section, and a platform includes an opening on a top surface for insertion of the spar in which a shell made from an exotic high temperature resistant material is secured between the tip cap and the platform. The spar is tapered to form thinner walls at the tip end to further reduce the weight and therefore a pulling force due to blade rotation. The spar and tip cap piece is made from a NiAL material to further reduce the weight and the pulling force.
Authors:
;
Publication Date:
OSTI Identifier:
1264422
Report Number(s):
9,394,795
12/706,241
DOE Contract Number:
FG02-07ER84668
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Feb 16
Research Org:
J & S DESIGN LLC, Jupiter, FL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS