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titleRotordynamic Fluid Forces of Floating Ring Seal for Rocket Turbopump
Author(jpn)弘松, 純; 内海, 政春; 高田, 仁志; 長尾, 直樹; 江口, 真人; 井上, 秀行
Author(eng)Hiromatsu, Jun; Uchiumi, Masaharu; Takada, Satoshi; Nagao, Naoki; Eguchi, Masato; Inoue, Hideyuki
Author Affiliation(jpn)宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センターエンジン研究開発グループ(JAXA); 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センターエンジン研究開発グループ(JAXA); 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センターエンジン研究開発グループ(JAXA); 宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センターエンジン研究開発グループ(JAXA); 荏原製作所; イーグル工業株式会社
Author Affiliation(eng)Engine System Research and Development Group, Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Engine System Research and Development Group, Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Engine System Research and Development Group, Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Engine System Research and Development Group, Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); EBARA CORPORATION; EAGLE INDUSTRY CO., LTD.
Issue Date2013-10-31
Publisher宇宙航空研究開発機構(JAXA)
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構研究開発資料
JAXA Research and Development Memorandum
VolumeJAXA-RM-13-008E
Start page1
End page18
Publication date2013-10-31
Languageeng
AbstractA floating ring seal (FRS) has been employed as a noncontact type seal, which seals in high-pressure liquid oxygen for the rocket engine turbopump. The turbopump, high-speed, high-power turbomachinery, has suffered from rotor vibration problems up to the present time. However, as the dynamic behavior of FRS has rarely been focused on, it is necessary to clarify the rotordynamic (RD) fluid forces of FRS. The objectives of the present study were to evaluate the RD fluid forces of FRS analytically (bulk-flow model) and experimentally, and to elucidate the structural behavior of FRS caused by the whirling motion of the rotor. Evaluation of RD fluid forces was attempted, and development of a program for evaluation of the FRS is now in progress. RD fluid forces of FRS were measured by an experimental apparatus with an active magnetic bearing. These forces had no significant impact on rotordynamic stability. The axial force induced by differential pressure presses the floating-ring (FR, the component of the FRS) against the stationary housing. Because of the increasing friction force of the secondary contact surface, high axial loads increase the radial force required to reposition the FR. Therefore, it is very important to investigate rotordynamic forces as tribological behavior.
Description形態: カラー図版あり
Physical characteristics: Original contains color illustrations
KeywordsFloating ring seal; Whirling motion; Rotordynamic forces; Bulk-flow model; Stribeck curve
Document TypeTechnical Report
JAXA Category研究開発資料
NASA Subject CategorySpacecraft Propulsion and Power
ISSN1349-1121
NCIDAA11983593
SHI-NOAA0062043000
Report NoJAXA-RM-13-008E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/13745


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