Experimental Stability Studies of Hybrid Herringbone-Grooved Gas-Lubricated Journal Bearings.
Technical rept. Feb 70-Jul 71,
MIDWEST RESEARCH INST KANSAS CITY MO
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The report presents the results of an experimental and, in some cases, analytical investigation into the stability characteristics of the herringbone-grooved rotor supported in self-acting and hybrid gas-lubricated journal bearings. The analytical investigation was accomplished using previously developed theory. Measurements of threshold of instability speeds half-frequency whirl were made for four different rotors. Two of the rotors were fully grooved and two were partially grooved. Variables investigated were bearing radial load, radial clearance, and bearing supply pressure. Also, the effects on stability of rotating the herringbone-groove geometry so as to be both inward pumping toward the bearing center and outward pumpingaway from the bearing center and of axially misaligning the groove geometry were investigated. Author
- Machinery and Tools