Theoretical Analysis of Bump-Floating-Ring Seals

This paper describes modelling and analysis of bump floating ring seal with the bump effect and the fluid dynamic effect of floating ring seal. A numerical analysis method is developed and implemented for predicting the BFRSs' lock-up eccentricity ratio, leakage flow-rate, rotordynamic force coefficients and attitude-angle. Also, the comparison of the BFRSs' properties with those of the conventional FRSs, having common geometric parameters and operating conditions, is performed. A turbulent bulk-flow model is used to predict the flow and rotordynamic parameters. From the analytical results, the lock-up eccentricity reduces by 50% FRSs, the BFRSs' direct stiffness and damping coefficients are higher, and cross-coupled terms are less responsive to changing rotor-speed. Although, the lock-up eccentricity is smaller, the sealing effectiveness remains unchanged. The predictions are reasonably in good agreement with test data, except the attitude-angles are over-predicted.

並列關鍵字

Bump floating-ring seal ； Leakage ； Rotordynamic coefficients ； Eccentricity ratio ； Turbo-pump

被引用紀錄

林文忠（2017）。超精密鑽石車削加工微光學結構製程中毛邊形成機制與抑制方法之研究〔博士論文，淡江大學〕。華藝線上圖書館。https://doi.org/10.6846/TKU.2017.00952

Chen, C. L. (2005). X-光吸收光譜對過渡金屬陶鐵磁體薄膜和超晶格的電子結構與磁性之研究 [doctoral dissertation, Tamkang University]. Airiti Library. https://doi.org/10.6846/TKU.2005.00070

Lin, J. Y. (2015). 利用拉曼和表面增強拉曼光譜技術鑑定雙核金屬錯合物-四-(乙醯氧基)化二釕、三核混金屬串錯合物-四-(二吡啶胺)化二釕鎳與五核混金屬串錯合物-四-(三吡啶二胺)化二釕三鎳中過渡金屬之價數 [master's thesis, National Tsing Hua University]. Airiti Library. https://doi.org/10.6843/NTHU.2015.00099

黃綜輝（2004）。以切割法為基礎之電壓降導向元件擺置方法〔碩士論文，中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200400676

Chi, J. C. (2006). 實體設計系統之建構與演算法開發 [doctoral dissertation, Chung Yuan Christian University]. Airiti Library. https://doi.org/10.6840/CYCU.2006.00446

國際替代計量

Theoretical Analysis of Bump-Floating-Ring Seals

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