Multiple piece turbine airfoil
First Claim
Patent Images
1. An air cooled turbine airfoil comprising:
- a shell having an airfoil shape with a leading edge, a trailing edge, and a pressure side wall and a suction side wall extending between the leading edge and the trailing edge;
a spar forming an internal cooling air supply channel;
a plurality of rounded channels on an inner surface of the shell;
a plurality of hook shaped channels on an outer surface of the spar;
the shell channels and the spar channels being opposed to one another;
a hook shaped strut having a rounded end and a hook end;
a rounded end of the hook shaped strut being inserted into the rounded channel of the shell; and
,the hook shaped end of the hook shaped strut being inserted into a hook shaped channel of the spar to retain the shell to the spar.
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Abstract
A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of hook shaped struts each mounted within channels extending in a spanwise direction of the spar and the shell to allow for relative motion between the spar and shell in the airfoil chordwise direction while also fanning a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure. The hook struts have a hooked shaped end and a rounded shaped end in order to insert the struts into the spar.
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Citations
10 Claims
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1. An air cooled turbine airfoil comprising:
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a shell having an airfoil shape with a leading edge, a trailing edge, and a pressure side wall and a suction side wall extending between the leading edge and the trailing edge; a spar forming an internal cooling air supply channel; a plurality of rounded channels on an inner surface of the shell; a plurality of hook shaped channels on an outer surface of the spar; the shell channels and the spar channels being opposed to one another; a hook shaped strut having a rounded end and a hook end; a rounded end of the hook shaped strut being inserted into the rounded channel of the shell; and
,the hook shaped end of the hook shaped strut being inserted into a hook shaped channel of the spar to retain the shell to the spar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification