Application of High-Frequency Resonance Techniques for Bearing Diagnostics in Helicopter Gearboxes

Abstract

The feasibility of the High-Frequency Resonance Technique (HFRT) for defect analysis of rolling-element bearings found in a UH-1 helicopter main transmission was demonstrated. A study was conducted to determine optimum conditions under which to test each bearing. These included accelerometer location, speed, load, housing design and detection frequency. The results provided general testing criteria for each bearing. An analytical and experimental bearing race resonance study was conducted on each bearing. The bearings were then mounted in a test rig and run at various speeds, loads and housing designs. Good bearings and bearings with artificially-induced discrete defects were run.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1974
Accession Number
ADA004014

Entities

People

  • G. W. Hogg
  • Mark S. Darlow
  • Robert H. Badgley

Tags

Communities of Interest

  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Ball Bearings
  • Bearing Races
  • Bearings
  • Computer Programs
  • Detection
  • Detectors
  • Dynamic Response
  • Excitation
  • Gears
  • Helicopters
  • Instrumentation
  • Measurement
  • Resonant Frequency
  • Roller Bearings
  • Schematic Diagrams
  • Spectrum Analyzers
  • Test And Evaluation

Fields of Study

  • Engineering

Readers

  • Acoustics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).