Accession Number:

AD0253820

Title:

OBSERVATIONS ON THE PERFORMANCE OF SELF-ACTING GAS JOURNAL BEARINGS

Descriptive Note:

Corporate Author:

GENERAL ELECTRIC CO SCHENECTADY NY

Personal Author(s):

Report Date:

1961-03-03

Pagination or Media Count:

1.0

Abstract:

The first part of the report discusses a new theory for the occurrence of the phenomenon of half-frequency whirl in plain journal bearings. This instability is one of the most serious problems in the application of these bearings today. An evaluation of the stability of these bearings is presented on the basis of different forms of energy contained within the gas film. The objective of this analysis is to furnish a simple, easy-to-use, method of predicting the threshold of this destructive instability. Means can then be provided for raising this inception speed above the operating range of the equipment. As such, it is subject to simplifying assumptions which limit its accuracy of calculation in some circumstances. Nevertheless, in the comparisons which are carried out with the scant data available, the results are consistent with most experimental observations. Part II of the report presents the results of an experimental investigation of moisture condensation in the gas film of bearings under a rotating unbalance load synchronous whirl. Wide variations in relative humidity, LD ratio, load, and speed, were employed. The results, though coarse, show a consistent effect due to the ratio of bearing load to ambient pressure. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE