Accession Number:

AD0648059

Title:

INCREASING THE WEAR-RESISTANCE OF BRONZE AND GRAPHITE PARTS OF AIRCRAFT ENGINES,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1960-08-01

Pagination or Media Count:

23.0

Abstract:

Testing the efficiency of aircraft engines indicates that the oil leaks through the gasket of the transmission. For purposes of research, parts were selected from the ASh-62IR aircraft engine which tends to breakdown more often than others for the above-mentioned reason according to the statistical data of Civil Air Fleet repair shops. The thrust and packing ring of the transmission shaft to the generator and magneto are included in these machinery parts. Thrust rings are made of 38KhMYuA nitrided steel packing rings are from powder-metal bronze-graphite of the following composition 10SH, 1.5 to 2 graphite, and copper - the remainder. Investigation showed that, in a cross-section of thrust rings having deep grooves on the friction surface, the microhardness constitutes one-third less than in new parts. Such a decrease in hardness can be explained by structural changes occurring under the influence of high temperatures on the friction surface and developing under specific conditions. Author

Subject Categories:

  • Aircraft
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE