DYNAMIC SHAFT SEALS IN SPACE.

Abstract

A theoretical investigation of rotating fluid ring seals was completed. The analysis predicts the performance of plain rotating housing and rotating disk seals. The experimental investigation of the interface instability associated with rotating fluid ring seals continued utilizing the water seal test rig. The testing provided additional data concerning the extreme operating range of the dynamic zero leakage (DZL) seals which were designed to alleviate the interface instability problem. So far, two seal concepts have been developed which suppressed liquid leakage up to speeds of 20, 000 RPM. Water seal testing was also performed on the rotating disksqueeze seal configuration to obtain additional test data for correlating the squeeze seal results with theoretical analysis. The open loop of the water seal rig facility was converted to a close loop so that other fluids such as oil can be evaluated as sealing fluids. Seal testing for the SNAP 8 project using Dow's ET378 oil was initiated. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 15, 1963
Accession Number
AD0429211

Entities

Organizations

  • General Electric

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Electron Beams
  • Elements
  • Flow
  • Fluid Flow
  • Fluids
  • Friction
  • Heat Treatment
  • Liquid Metals
  • Manufacturing
  • Metal Seals
  • Reynolds Number
  • Shear Stresses
  • Test And Evaluation
  • Test Facilities
  • Turbulent Flow

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.
  • Systems Analysis and Design
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • Space
  • Space - Hall-Effect Thruster
  • Space - Spacecraft Maneuvers