Shroud tip clearance control ring

Details Shroud tip clearance control ring Shroud tip clearance control ring

2005-06-15

2008-09-09

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Method of operation

C415S126000, C415S136000, C415S138000, C415S173200, C415S173600

Reexamination Certificate

active

07422413

ABSTRACT:
The present invention is a shroud tip clearance control ring for use in a gas turbine engine in which a rotary blade and a shroud ring form a gap that forms a blade outer air seal, and where the shroud ring is formed of two shroud segment halves, each shroud segment including a pin located near an end of the segment, the pins being slidably within slots formed on the casing, and a drive member moves along a direction in which the pins are moved along the slots to change a radius of the shroud ring in a way such that the radius remains substantially the same along a 360 degree angle of the shroud ring. The drive member includes two positions, one that places the shroud ring in a radially inward position, and another position that places the shroud ring in a radially outward position.

REFERENCES:
patent: 3085398 (1963-04-01), Ingleson
patent: 3807891 (1974-04-01), McDow et al.
patent: 4343592 (1982-08-01), May
patent: 5049033 (1991-09-01), Corsmeier et al.
patent: 5056988 (1991-10-01), Corsmeier et al.
patent: 5330321 (1994-07-01), Roberts et al.
patent: 6935836 (2005-08-01), Ress et al.

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