结构刚度和阻尼对箔片轴承承载力的影响.pdf

http:/www.paper.edu.cn 1 1980 (50206015)(20020698028) -1- http:/www.paper.edu.cn 0 0 W LD 0 0.7 3.5 4 2.7143 10()() WLD D WL D -2- http:/www.paper.edu.cn -3- http:/www.paper.edu.cn -4- http:/www.paper.edu.cn abc 5 1Walton, J.F Mohawk Innovative Technology Newsletter. Winter 1998, Mohawk Innovative Technology, Albany, NY, 1998 2DellaCorte, C Performance and Durability of High Temperature Foil Air Bearings for Oil-Free Turbomachinery. NASA/TM-1999-209187 3J. F. Walton II Oil-free Foil Bearings for Propulsion and Power Generating Gas Turbine Engines: Mescoscopic to Macroscopic Scale. Presented at ASME Turbo Expo June, 2003, Atlanta 4H. Heshmat. Advancements in the Performance of Aerodynamic Foil Journal Bearings: High Speed and Load Capability. Journal of Tribology, 1994,116(2): 287-295 -5- http:/www.paper.edu.cn 5DellaCorte, C Load capacity estimation of foil air journal bearings for Oil-Free turbomachinery applications. Tribology Transactions, 2000, 43(4): 795-801 6Arakere Nagaraj K Analysis of foil journal bearings with backing springs. Tribology Transactions, 1996,39(1): 208-214 7Hou Yu. The study of self-acting gas bearing cryogenic turboexpander (Dissertation for the Doctorate). Xian: Xian Jiaotong University, 1999 8Zhang Hongxing. Elastic Cylindric Shell Hydrodynamic Gas Bearing Supported with Wave-formed Foil. Journal of Shanghai Institute of mechanical Engineering, 1980(4):1-15 9Lee, Yong-Bok. Dynamic characteristics of a flexible rotor system supported by a viscoelastic foil bearing(VEFB).Tribology International, 2004,37(9): 679-687 The Effect of Structural Stiffness and Damping on the Load Capacity of Foil Bearing Cui Mingxian, Hou Yu, Wang Linzhong, Chen Chunzheng Institute of Refrigeration and Cryogenic Engineering, Xian Jiaotong University, Xian 710049 Abstract One key technical hurdle for the further application of foil bearing lies in its low load capacity, which is mainly depended on the structural stiffness and damping. Using the concept of load capacity coefficient, the variations of structural stiffness in circumferential, axial and radical directions on the performance of load capacity of foil bearing are analyzed specifically. And the increase of damping, demonstrated mainly in the form of column frictional damping results in increased structural stiffness and load capacity, along with the improved whirl stability. Different means to improve the load capacity are compared through load capacity coefficient. Keywords: Foil Bearing, Load Capacity, Structural Stiffness, Damping -6-