Accession Number : ADD012311

Title :   Leak Free Floating Packing Shaft Seal.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Spargo,John D ; Neild,A B ; Phillips,Martha M

Report Date : 25 Feb 1986

Pagination or Media Count : 11

Abstract : A leak free floating packing shaft seal is provided for a rotatable shaft and a supporting annular structure has a high pressure upstream side and a low pressure downstream side. The floating seal includes and annular holder which is slidably mounted in the supporting structure for radial movement therein. A ring of packing material is mounted in a recess in the inner circumferential side of the holder. A first O-ring arrangement is mounted between the supporting structure and the upstream side of the holder for effecting a seal from the high pressure environment, and second O-ring arrangement is mounted between the supporting structure and the downstream side of the holder. At least one passageway is provided for communicating the upstream and downstream side of the holder. A least one passageway is provided for communicating the upstream and downstream size of the holder. At least one passageway is provided for communicating the upstream and downstream size of the holder for balancing the pressures therebetween. With this arrangement the holder is free to undergo the radial movement without leakage and the detriment of laterall forces thereon.

Descriptors :   *PATENTS, *SEALS(STOPPERS), SUBMARINES, PROPELLER SHAFTS, HYDROSTATIC PRESSURE, HIGH PRESSURE, O RINGS, HOLDERS

Subject Categories : Adhesives, Seals and Binders
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE