Accession Number:

AD0642523

Title:

DIAGNOSTIC NOISE STUDY OF POWER TRANSMISSION SYSTEMS

Descriptive Note:

Final rept.,

Corporate Author:

CURTISS-WRIGHT CORP CALDWELL NJ

Personal Author(s):

Report Date:

1966-09-01

Pagination or Media Count:

89.0

Abstract:

An investigation was made of noise in the X-19 power transmission system to demonstrate the feasibility of using the diagnostic sonic technique to determine the mechanical condition of the internal gearing and bearings. The method employed in monitoring the transmission system utilizes the noise generated by gears and bearings to determine integrity of the system. The condenser type microphone system was utilized to record these signals on magnetic tape, and the recorded data were then analyzed using the panoramic sonic analyzer. In addition to the diagnostic sonic concept, a spectrometric oil analysis of the system was also made. The diagnostic sonic analysis of the X-19 power transmission system was successful in detecting the majority of the system anomalies including a gear fatigue failure, several bearing failures, and gear tooth scuffing conditions. Correlation between acoustic and spectrometric oil analysis was also achieved. The results of this investigation indicate the ability of the diagnostic sonic analysis technique in determining the mechanical integrity of the X-19 power transmission system. Although spectrometric oil analysis cannot indicate fatigue failures which may occur between sampling periods and obviously cannot detect nonlubricated components, in many cases additional information is obtained by the correlation of the oil sampling and sonic methods. Author

Subject Categories:

  • VSTOL
  • Machinery and Tools
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE