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Numerical study on dynamic characteristics of journal bearing considering journal whirling motion[J]. Journal of Aerospace Power, 2018, 33(1): 137-146. doi: 10.13224/j.cnki.jasp.2018.01.017
Citation: Numerical study on dynamic characteristics of journal bearing considering journal whirling motion[J]. Journal of Aerospace Power, 2018, 33(1): 137-146. doi: 10.13224/j.cnki.jasp.2018.01.017
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Numerical study on dynamic characteristics of journal bearing considering journal whirling motion

doi: 10.13224/j.cnki.jasp.2018.01.017
  • Received Date: 2016-06-05
  • Publish Date: 2018-01-28
    Abstract
  • The unsteady solution combined with mesh deformation technique was used to establish a solution model of the dynamic characteristics of journal bearing in consideration of whirling frequency and orbit of the journal. On the basis of verifying the accuracy of the solution model, the influences of whirling frequency and eccentricity on the dynamic characteristics of journal bearing were studied when journal whirled with sinusoidal orbit, circular orbit and elliptical orbit. Study results indicate that the radical clearance and oil film pressure change along with the whirling motion of the journal. The smaller radical clearance means the greater oil film pressure. With the sinusoidal whirling orbit of the journal, oil film forces change, and the frequency of the oil film force is the same as whirling displacement of the journal. However, the phase of oil film force lags behind the whirling displacement. The whirling frequency and orbit of the journal greatly influence the dynamic characteristics of journal bearing, so the whirling motion of the journal should be considered. With the increase of eccentricity, the absolute value of the dynamic coefficients increase.

     

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