Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1991-08-23
1992-08-11
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 53, 277173, 277174, F16J 1544
Patent
active
051372860
ABSTRACT:
A seal ring is spaced radially about a rotating shaft and axially from opposed walls of a housing by permanent directional magnets mounted in the seal ring, shaft and housing. Permanent magnets are disposed about the interior surface of the seal ring and the exterior surface of the shaft, respectively, such that opposite poles lie in radial opposition affording a repelling force therebetween maintaining a radial gap therebetween constant. Permanent directional magnets are disposed on each side of the gaps between the seal ring and opposing axial faces of the housing and have like poles in opposition to one another to locate the seal ring in the axial direction. The gaps between the housing and seal ring and between the seal ring and shaft are maintained by the magnets at minimum clearance, thereby affording a non-contacting seal with well defined leakage paths.
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Power Engineering/Jan. 1990, "Magnetic Bearings can Increase Availability, Reduce O&M Costs, " Gray et al.
Cuchlinski Jr. William A.
Cummings Scott W.
General Electric Company
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