Sealing device for turbine blades of a turbojet engine

Details Sealing device for turbine blades of a turbojet engine Sealing device for turbine blades of a turbojet engine

1984-07-06

1986-01-21

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Including additional means causing or controlling fluid flow...

415116, 415134, 415136, 415138, F01D 1108

Patent

active

045654921

ABSTRACT:
A sealing device is disclosed for maintaining a small positive clearance between packing segments and the turbine blade tips of a turbojet engine. The packing segments are connected to an inner ring which is, in turn, connected to an outer ring, all disposed within the turbojet casing. The coefficient of thermal expansion of the inner ring is greater than that of the outer ring such that, as air is directed onto the structure from the engine compressor, the differential expansion or contraction of the rings serves to move the packing segment in a radial direction to maintain the clearance between them and the turbine blade tips.

REFERENCES:
patent: 3146992 (1964-09-01), Farrell
patent: 4222707 (1980-09-01), Drouet et al.
patent: 4317646 (1982-03-01), Steel et al.
patent: 4375677 (1983-04-01), Hallinger et al.
patent: 4527385 (1985-07-01), Jumelle et al.
patent: 4529355 (1985-07-01), Wilkinson

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