Engine blade clearance control system with piezoelectric actuato

Details Engine blade clearance control system with piezoelectric actuato Engine blade clearance control system with piezoelectric actuato

1994-11-25

1996-08-13

Look, Edward K.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

415 14, 415118, F01D 1122

Patent

active

055450075

ABSTRACT:
The blades and the outer case of an encased engine, such as a turbo engine or the like will expand and contract during periods of operation. Blade expansion and contraction can result from operating temperature changes, rotational velocity changes, or the like. The engine casing includes a segmented seal which is properly spaced apart from the engine blade tips so as to provide optimum operation of the engine. Proximity sensors mounted on the engine detect the radial clearance of the engine blades to the seal segments at all times. The seal segments are mounted on a corrugated piezoelectric support which is electrically stimulated so as to properly adjust the seal segments relative to the blade tips to provide the proper spacing as the blades and case expand and contract. Appropriate stimulation of the piezoelectric support will move the seal segments toward or away from the blade tips as needed.

REFERENCES:
patent: 4087199 (1978-05-01), Hemsworth et al.
patent: 4384819 (1983-05-01), Baker
patent: 4462264 (1984-07-01), Feller
patent: 5012420 (1991-04-01), Walker
patent: 5370340 (1994-12-01), Pla

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