期刊
TRIBOLOGY TRANSACTIONS
卷 57, 期 6, 页码 1086-1095出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/10402004.2014.937885
关键词
Gas Foil Bearing; Lobe Bearing; Oil-Free Turbocharger; Rotordynamic Analysis; Rotordynamic Stability
资金
- Korea Institute of Science and Technology (KIST): R&D on Power Generation and Energy Storage Technology for Tri-Gen System
- New Faculty Research Program of Kookmin University in Korea
- Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Knowledge Economy, Republic of Korea [20134040200580]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20134010200580] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [2E24662] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This article presents the predictions of the rotordynamic performance of oil-free turbochargers (TCs) for various lobed gas foil bearings (GFBs) with the first-generation bump-type configuration and compares these predictions to the measured test data reported earlier. The three-lobed GFBs used for the simulations have increased bearing clearances and mechanical preloads with a fixed minimum bearing clearance, thus yielding larger average bearing clearances and higher wedge effects at the same time. The engine-induced TC housing excitation is found to have no influence on the critical speeds and damping ratios of the rotor rigid modes. The synchronous and asynchronous GFB analyses imply decreases in destabilizing forces for the highly lobed GFBs. The predicted critical speed and damping ratio of the TC rotor supported on the lobed GFBs demonstrate increasing system natural frequency and enhanced rotordynamic stability with increasing mechanical preload. The rotordynamic and bearing analyses of the lobed GFBs validate the beneficial effects of the mechanical preload on the rotordynamic stability of GFBs even with an increased average bearing clearance, which leads to a decreased bearing friction torque as well.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据