Abstract
Journal bearings are widely used for supporting high speed rotating machinery such as turbine, compressor and HDD spindle etc because of their high load carrying capacity, stability and durability. Resently, the engineering trend is oriented to higher speed and smaller sizes of rotating machinery, and then it is important to enhance stabilities for the journal bearings. Tilting pad journal bearing is generally used for high speed rotating machineries because of their advantages of stabilization. However, there are some problems using for compact size rotating machines for their high manufacturing cost and complicated structure. Therefore, it is necessary to enhance the stability of more simple bearings compared with tilting pad bearing in order to use for small size rotating machinery. In this paper, the effects of the starvation mechanism and the orientation angle on the stability of elliptical journal bearing are examined experimentally. It is found that the stabilization of journal bearings is improved drastically by suitable combination of the lubrication conditions.
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