Turbomachine with active tip clearance control

Details Turbomachine with active tip clearance control Turbomachine with active tip clearance control

1992-06-22

1993-11-23

Look, Edward K.

Rotary kinetic fluid motors or pumps

Runner or blade selectively adjustable relative to casing

Axially adjusted

415 14, 4151731, F01D 502, F04D 1710

Patent

active

052638162

ABSTRACT:
A turbomachine including a case, a rotor, a plurality of rotor blades on the rotor each having a blade tip, a shroud around the rotor blade tips, and bearings mounting the rotor on the case for rotation about a centerline of the case and for bodily shiftable movement in the direction of the centerline. The rotor blade tips and an inside wall of the shroud flare radially outward in the direction of the centerline so that when the rotor moves in the direction of the centerline toward the shroud a clearance gap between the blade tips and the inner wall of the shroud decreases and vice versa. An electromagnetic actuator on the case magnetically attracts a thrust plate on the rotor against a net dynamic force on the rotor. A control system of the actuator controls the magnetic attraction of the actuator in response to signals from a position sensor measuring the actual magnitude of the clearance gap to maintain the actual clearance gap at a predetermined magnitude.

REFERENCES:
patent: 1823310 (1931-09-01), Allen
patent: 3045894 (1962-07-01), Ross
patent: 3329095 (1967-07-01), Bartels
patent: 3407740 (1968-10-01), Samerdyke
patent: 4264271 (1981-04-01), Libertini
patent: 4330234 (1982-05-01), Colley
patent: 4332523 (1982-06-01), Smith
patent: 4384819 (1983-05-01), Baker
patent: 4418537 (1983-12-01), Iwamoto et al.
patent: 4523896 (1985-06-01), Lhenry et al.
patent: 4657479 (1987-04-01), Brown et al.
patent: 4683716 (1987-08-01), Wright et al.

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