Active seal

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member


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277410, 277919, F02C 712




A seal assembly includes a seal element having a plurality of movable seal segments and further includes a plurality of actuators, each associated with a respective one of the seal segments. Each of the seal segments has a coil that generates electrical energy in the presence of a varying magnetic field. Each of the actuators receives energy from the associated seal segments and in response thereto produces a force that causes the segment to move toward or away from a surface on an opposing seal member.
A method for fabricating a seal element for a gas turbine engine includes providing a wafer, forming seal segments on the wafer, dividing the wafer into a plurality of seal segments, and arranging at least two of the plurality of seal segments into a seal element.

patent: 4386784 (1983-06-01), Banks
patent: 4462264 (1984-07-01), Feller
patent: 4575103 (1986-03-01), Pedu
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patent: 5168857 (1992-12-01), Hickey
patent: 5174584 (1992-12-01), Lahrman
patent: 5263816 (1993-11-01), Weimer et al.
patent: 5281090 (1994-01-01), Starling
patent: 5545007 (1996-08-01), Martin
patent: 5622438 (1997-04-01), Walsh et al.
patent: 5736800 (1998-04-01), Iannello et al.
patent: 6029978 (2000-02-01), Pelstring et al.


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