Journal of Advanced Mechanical Design, Systems, and Manufacturing (Mar 2007)

Hydrostatic Asymmetric Journal Gas Bearings for Largely Unbalanced Rotors of Seismic ACROSS Transmitters

  • Tomohiko ISE,
  • Takao TORII,
  • Nobuyoshi MORITA,
  • Shinichi TOGO,
  • Makoto OKANO

DOI
https://doi.org/10.1299/jamdsm.1.93
Journal volume & issue
Vol. 1, no. 1
pp. 93 – 101

Abstract

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In currently working seismic ACROSS (Accurately Controlled Routinely Operated Signal System) transmitters, an unbalanced rotor with large eccentric mass, which generates elastic waves, is supported by roller bearings. With such a type of bearings, bearing losses are so large that heat generation and cooling system become serious problems. To solve these problems, a trial test ACROSS transmitter using hydrostatic gas bearings are designed, made and carried out. The test results show that the hydrostatic gas bearings safely support a largely unbalanced rotor with eccentric mass. In this paper, a new type of hydrostatic journal gas bearings with asymmetric bearing area specially proposed for a largely unbalanced rotor are analyzed and tested. It is shown that hydrostatic asymmetric journal gas bearings have large load capacity for a largely unbalanced rotor and low gas flow rate compared to the conventional hydrostatic symmetric journal gas bearings.

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