GEOMETRY EFFECTS ON THE THRESHOLD OF HALF-FREQUENCY WHIRL IN GAS-DYNAMIC JOURNAL BEARINGS

Abstract

Various groove arrangements and orifices were used to raise the threshold of Half-Frequency Whirl (HFW). Experimental results on several different bearing geometries are presented. The threshold of HFW was markedly influenced by the position of a small orifice with a 0.020 in. diam with respect to the load vector, and by grooves and their location with respect to the load vector. The load carrying capacity of a grooved bearing is largely dependent on the number of grooves and their position with respect to the load vector. The lower the attitude angle the higher the threshold of HFW. Hybrid bearings can be designed with high threshold of HFW. Unless properly designed, however, they have much smaller load carrying capacity than plain cylindrical journal bearings. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 16, 1961
Accession Number
AD0266016

Entities

People

  • B. Sternlicht
  • L.w. Winn

Organizations

  • General Electric

Tags

DTIC Thesaurus Topics

  • Bearings
  • Frequency
  • Journal Bearings
  • Payload

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).
  • Vision Science/Vision Psychology/Cognitive Neuroscience.