United Technologies Corporation

Conan P Cook

Bryan P Dube

Richard W Hoff

John H Mosley

Andrew D Milliken

Joseph A Sylvestro

Takao Fukuda

Irwin D Singer

Francis R Price

The present invention relates to a system for delivering cooling air to a seal arrangement in a turbine stage of a gas turbine engine. The system comprises at least one vane having a passageway extending from an outer platform of the at least one vane to an inner platform of the at least one vane. A tube insert is positioned within the passageway. The tube insert has an inlet at one end for receiving cooling air from a source of cooling air and an outlet at a second end. A cover assembly is attached to the second end of the tube for receiving cooling air from the tube and delivering the cooling air to the seal arrangement. In a preferred embodiment, the cooling air is pre-swirled in the direction of rotation of a rotor stage of the turbine stage.

Integral swirl knife edge injection assembly

A coolable airfoil having a passage for discharging particulates entrained in cooling air is disclosed. Various construction details are developed to provide clean cooling air to the leading edge of the airfoil. In one embodiment, a chordwise duct extends past a spanwisely extending supply passage to the inlet of a spanwisely extending rear passage such that momentum effects direct the flow of a portion of cooling air and particulates from the duct, past the entrance of the supply passage and into the rear passage and a larger portion of the flow of cooling air into the supply passage for cooling the leading edge of the airfoil.

Coolable airfoil

The present invention relates to an improved fixture (70) for masking a portion of an airfoil (12) during coating operations. The fixture (70) includes a masking member (54) and a clamp (74) for forcing the masking member (54) into contact with the portion of the airfoil (12) requiring masking.

Fixture for masking a portion of an airfoil during application of a

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Tolland, CT, United States of America

Conan P Cook