Pre-stressed/pre-compressed gas turbine nozzle
AssigneeGeneral Electric Company
InventorsHoyle Jang, Gary Michael Itzel, Yufeng Phillip Yu
Life of this patent
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Abstract
A method of increasing low cycle fatigue life of a turbine nozzle comprising a plurality of stationary airfoils extending between radially inner and outer ring segments comprising a) providing at least one radial passage in each of the plurality of airfoils; b) installing a rod in the radial passage extending between the radially inner and outer ring segments and fixing one end of the rod to one of the inner and outer rings; and c) pre-loading the rod to compress the airfoil between the inner and outer ring segments.
Claims13
A method of increasing low cycle fatigue life of a turbine nozzle comprising a plurality of stationary airfoils extending between radially inner and outer ring segments comprising:
- a) providing at least one radial passage in each of said plurality of airfoils;
- b) installing a rod in said radial passage extending between said radially inner and outer ring segments and fixing one end of said rod to one of said inner and outer rings;
- and
- c) pre-loading said rod to compress said airfoil between said inner and outer ring segments.
A nozzle for a gas turbine comprising a plurality of airfoils extending between radially inner and outer ring segments;
- each airfoil having means for pre-loading said airfoil in compression.
A nozzle for a gas turbine comprising a plurality of airfoils extending between radially inner and outer ring segments;
- each airfoil having a pre-loading rod extending radially therethrough, said pre-loading rod having one end fixed to one 9of said radially inner and outer ring segments, and an opposite, theaded free end engaged by a threaded nut, said airfoil being under compression resulting from said threaded nut being tightened down against said radially outer ring segment.
Dependencies are inferred from the claim text.