小型流体軸受における軸受端テーパシールからの油漏れに関する基礎研究 : 第2報,漏洩限界回転速度の理論的検討(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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Typical function of a tapered seal widely applied in the fluid film bearing is to prevent oil leakage when the rotor is rotating at a high speed. In this paper, the sealing capacity for oil leakage is discussed theoretically. The profile of meniscus is obtained by integrating Laplace's equation relating the surface tension and the pressure difference across the fluid surface, where the pressure difference is obtained by the pressure field analysis based on Navier-Stoke's equation. Three kinds of probable situations, under which the meniscus burst and the consequent oil leakage may be induced, are supposed. The calculated results are summarized in a form of the critical rotational speed of the rotor for the combinations of the taper angle and the fluid depth.
社団法人日本機械学会の論文
2009-10-25