Journal of Advanced Science
Online ISSN : 1881-3917
Print ISSN : 0915-5651
ISSN-L : 0915-5651
21 巻 , 3+4 号
選択された号の論文の3件中1~3を表示しています
Paper
  • Nobuhiro HARIGAE, Keisuke TAKATA, Yoshio TAIRA, Keisuke IWATA, Aki ...
    2009 年 21 巻 3+4 号 p. 43-47
    発行日: 2009年
    公開日: 2010/02/05
    ジャーナル フリー
    Effects of electron beam irradiation on mist resistance and wetting were studied for soda lime glasses. The electron beam irradiation decreased the time to clear vision on the misted soda lime glasses. The treatment was conformed to show the mist resistance of the glass. To discuss the effect of electron beam on mist resistance, it was evaluated by using contact angle of sessile drop of water. Based on electron spin resonance (ESR) results, the effects of electron beam on the mist resistance were discussed. Electron beam irradiation broke the weakly bonded pairs and formed the dangling bonds in soda lime glasses.
Paper
  • Masayuki OCHIAI, Masaya KOBAYASHI, Hiromu HASHIMOTO
    2009 年 21 巻 3+4 号 p. 48-52
    発行日: 2009年
    公開日: 2010/06/11
    ジャーナル フリー
    This paper describes the safety operating system of oil film journal bearing using supply oil control system. Journal bearings are widely used for high speed rotating machinery such as turbines, pumps, and compressors because they can support the high speed rotating shaft across the oil lubricating film. However, in higher speed self-excited vibration which is called oil whip is generated and then they cause the seizure of bearing surface or breakdown of the machinery. It is, therefore, important to avoid the oil whip. Hashimoto et. al. suggested the stabilization method of the journal bearing using starved lubrication and the applicability of the method is verified theoretically and experimentally. The next step of the stabilization method is decreasing the several risks such as the contact of the bearing excess of decreasing the supply oil quantity. In this paper, we propose the safety and secure system by controlling the supply oil quantity for stabilization of the journal bearing using the starved lubrication and the effectiveness of the system is verified experimentally.
Paper
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