Blade tip clearence control apparatus
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United States of America Patent
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Aug 11, 1998
Grant Date -
N/A
app pub date -
Apr 22, 1997
filing date -
Apr 22, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A blade tip clearance control apparatus (10) comprises a plurality of circumferentially arranged spaced wall members (16) located adjacent the rotor path of a plurality of rotor blades (14). Each wall member (16) is mounted on a carrier (18) attached to an annular casing (22) radially outward thereof. Thermal expansion or contraction of the carrier (18) causes radial movement of the wall members (16). The wall members (16) have at least one fluid passage (20) therein. In operation a flow of fluid passing through the fluid passages (20) causes either thermal expansion or contraction of the wall member (16) to different radial positions.
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