Lip-type seals are employed in oil-lubricated stern-tube sealing systems of large modern ships. The seals are made of elastomers and appear to fail frequently due to a variety of reasons. Prominent among these reasons is the heat generated in sliding contact within the sealing assembly. In order to shed more light on the performance characteristics of the stern-tube sealing system, particularly to reduce the heat generation and stress, an analysis of the lip seal was conducted. Deformation behavior, stress distribution, and radial tightening force of the lip under statically loaded conditions were theoretically analyzed employing a general-purpose finite-element stress analysis program MARC-CDC. Large deformation of the seal was explained by flagging nonlinear analysis in the code. Stress contours and deformation of the seal were plotted at different pressure drops across the seal lip for seal-lip configurations currently in use in stern tubes. To further reduce the radial loading and stress levels two new cross-sectional configurations of the lip seal are recommended.

  • Corporate Authors:

    Mechanical Technology, Incorporated

    968 Albany-Shaker Road
    Latham, NY  United States  12110
  • Authors:
    • Winn, L W
    • Lee, C K
  • Publication Date: 1979-9

Media Info

  • Pagination: 72 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308454
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: MTI-79TR69 Intrm Rpt., MA-RD-920-79070
  • Contract Numbers: MA-6-38054
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM