Bearing Survivability and Friction Determination for Fuze Decoupling Applications

Abstract

The objective of this experiment is to find bearings that are suitable for de-spinning a fuze from a projectile body. Bearings must be able to survive both gun launch loads and high spin rates in this application. Three pairs of bearings are allowed to de-spin from approximately 250 Hz and then shot in a 155-mm air gun to simulate these loads. Overall bearing survivability and changes in friction (as measured by free spin time) are discussed in this report for three types of ball bearings. The revolutions per minute versus time plots acquired from spin-down trials provide a qualitative view of bearing performance and will allow bearing friction torque to be calculated in the future. All bearing pairs survived the loads applied. The quality of the selected bearings is evident in the spin-down profiles.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2012
Accession Number
ADA565277

Entities

People

  • Edward W. Marshall
  • M. Pica

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Air Guns
  • Ball Bearings
  • Bearings
  • Data Acquisition
  • Decoupling
  • Engineering
  • Friction
  • Guns
  • Manufacturing
  • Military Research
  • Munitions
  • Projectiles
  • Revolutions
  • Survivability
  • Test Facilities

Readers

  • Control Systems Engineering.
  • Explosive Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).