Accession Number : ADD006839

Title :   Composite Fan Blade Platform Double Wedge Centrifugal Seal.

Descriptive Note : Patent.

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Brantley,James W

Report Date : 15 Jan 1980

Pagination or Media Count : 5

Abstract : A sealing arrangement for preventing compressor fan air loss through the relatively wide gaps between adjacent blade platforms required in order to allow for rotation of the blades around their minor root axes in response to bird impact and the like. A thin flexible ribbon-like seal is bonded to one of the two adjacent blade platforms in the fan structure. At the gap, the seal includes a thickened wedge shaped portion with at least one invagination on the inner side facing the rotor axis. At the operating speed of the compressor fan, centrifugal force causes the thickened portion to be forced into the gap between adjacent platforms producing the required seal. (Author)

Descriptors :   *Patents, *Compressor blades, *Fan blades, *Seals(Stoppers), *Turbojet engines, Air flow, Losses, Platforms, Rotation, Bird strikes, Wedges, Centrifugal force

Subject Categories : Adhesives, Seals and Binders
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE