Flow Reversal System for Axial Fan

Abstract

An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotation about the drive shaft. A lock couples the disk to the wheel when the torsion spring is in tension. Fan blades are supported by the wheel, and are coupled to the disk. Rotation of the drive shaft rotates the fan blades generating a specific flow direction. To reverse the flow direction, a release mechanism uncouples the lock from the disk and wheel causing the disk to experience rotation about the drive shaft as tension in the torsion spring is released. The disk's relative rotation re-positions the fan blades reversing the flow direction as the drive shaft continues to rotate.

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Document Details

Document Type
Technical Report
Publication Date
May 14, 2004
Accession Number
ADD020152

Entities

People

  • Guy F. Borges

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Actuators
  • Air Flow
  • Attorneys
  • Blades
  • Couplings
  • Detectors
  • Drive Shafts
  • Environmental Pollutants
  • Fan Blades
  • Fans
  • Flow
  • Governments
  • Inventions
  • Release
  • Undersea Warfare
  • United States
  • United States Government

Readers

  • Aerodynamics.
  • Structural Dynamics.