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3報，界面形状および流体漏洩の基礎実験

摘要

Fundamental experiments on fluid leakage from the tapered seal by sleeve rotation were performed. The apparatus was so designed that surface tension, which generates the sealing function, acts adequately in size and accuracy as similar as in an actual device. The shapes of the meniscus at several rotational speeds were measured by using ultra-focus laser microscope, and the features of fluid leakage were observed by using high speed camera. The experimental results of the positions of the bottom portions of the meniscus coincide comparatively well with theoretical ones. It is also verified that the experimental threshold speeds of fluid leakage occurrence can broadly be estimated by the theoretical 'ultimate' and 'triggering' critical rotational speeds of the sleeve rotor.%小型流体軸受に使用されているテーパシールについrnて，第1報ではシールの作動原理を明らかにした上rnで，その性能を示す指標値を提案し，第2報ではスrnリープロータ回転による界面形状の変化および漏洩限rn界回転速度について理論解析を行った．本報では，第rn2報での理論結果を検証するための基礎実験についてrn述べる．