年次大会
Online ISSN : 2424-2667
ISSN-L : 2424-2667
2016
セッションID: J1030101
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ロータのふれまわり運動下における各種シールの動特性
黒木 康洋内海 政春徳永 雄一郎
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会議録・要旨集 フリー

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Rocket turbopump is representative of a high-speed and high-power turbomachinery that has often suffered from rotor vibration problems. It is important to elucidate the effect of rotordynamic fluid forces generated from shaft seals on the rotor vibration. The purpose of this study is to clarify and to compare with rotordynamic characteristics of various seals and the impact of this force on rotor vibration. Experiments to measure the rotordynamic characteristics of the seals were conducted by using the rotordynamic test stand in JAXA (JARTS) with active magnetic bearings. According to the result of comparison of the seals, the floating ring seal and the segment seal have high direct damping C, low cross-coupled stiffness k and high effective damping Ceff. These non-contacting seals have positive influence for stability of the rotor at wide range of whirling velocity of a rotor.

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