Evaluation of a Vibration Diagnostic System for the Detection of Spur Gear Pitting Failures
Abstract
A vibration diagnostic system was used to detect spur gear surface pitting fatigue in a closed-loop spur gear fatigue test rig. The diagnostic system, comprising a personal computer with an analog-to-digital conversion board, a diagnostic system unit, and software, uses time-synchronous averaging of the vibration signal to produce a vibration image of each tooth on any gear in a transmission. Several parameters were analyzed including gear pair stresswave and raw baseband vibration, kurtosis, peak ratios, and others. The system provides limits for the various parameters and gives a warning when the limits are exceeded. Several spur gear tests were conducted with this system and vibration data analyzed at 5-min. intervals. The results presented herein show that the system is fairly effective at detecting spur gear tooth surface fatigue pitting failures.... Bearings, Fatigue, Diagnostic gear.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1993
- Accession Number
- ADA266724
Entities
People
- D. P. Townsend
- J. J. Zakrajsek
Organizations
- National Aeronautics and Space Administration