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AssigneeAir Products and Chemicals, Inc.
InventorsChristopher R. McLean, Michel P. LeBlanc, Michael J. McKerrow, Bowie G. Keefer, Xiang Lu Kong, Alan O. Lebeck
Estimating the term…
A typical rotary face seal employs a seal ring rotating relative to a sealing surface and also employs means to urge the seal ring towards the sealing surface in order to effect a seal. The seal ring may itself comprise a seal face bonded to a backing ring. In certain applications, the seal face may deform significantly as a result of the temperature variations experienced and an undesirable crowning of the seal face may occur. Such crowning may be reduced by employing an improved seal ring with anti-crowning features in which the thickness of an edge of the seal face is different from that in the middle of the seal face, or in which a relief slot is employed in the seal face. The improved seal ring is particularly suited for rotary face seals used in a rotary valve in a rotary gas separation device.
A rotary face seal, comprising a seal ring, comprising a seal face bonded to a backing ring, a side of the seal face opposite the backing ring being essentially flat, the seal ring having as an anti-crowning feature a thickness of an edge of the seal face that is different from that of a middle portion of the seal face, wherein the seal face contacts a sealing surface.
A rotary face seal, comprising a seal ring having a seal face bonded to a backing ring, a seal ring backer and a sealing surface, the seal ring having as an anti-crowning feature a thickness of an edge of the seal face that is different from that of a middle portion of the seal face, wherein the seal face contacts the sealing surface.
A rotary face seal, comprising a seal ring, comprising a seal face bonded to a backing ring, a side of the seal face opposite the backing ring being essentially flat, the seal ring having as an anti-crowning feature a blind relief slot extending from the side of the seal face opposite the backing ring and partially through the seal face, wherein the seal face contacts a sealing surface.
Dependencies are inferred from the claim text.