Rotary joint with axial compensation

  • US 5,098,135 A
  • Filed: 12/11/1990
  • Issued: 03/24/1992
  • Est. Priority Date: 12/11/1990
  • Status: Expired due to Term
First Claim
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1. A rotary joint for a rotating drum having a journal having an axis of rotation characterized by its ability to accommodate axial expansion comprising, in combination, an annular mounting flange having an axis and a central passage, fastening means defined on said flange for coaxially attaching said flange to the drum journal, an annular wear plate having a central passage having an axis coaxially mounted on said flange, a seal surface defined on said wear plate concentric to said plate axis, an elongated housing having an internal chamber having a longitudinal axis, said housing having a port for communicating with a fluid conduit fitting, support means supporting said housing substantially coaxial with the journal axis of rotation, a cylindrical nipple partially within said housing chamber having a longitudinal axis coaxial with said chamber axis, said nipple being axially displaceable within said chamber, annular first sealing means interposed between said nipple and said housing whereby said nipple is sealed with respect to said housing at all axial nipple positions within said chamber, and second sealing means interposed between said nipple and said wear plate.

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