Stability Analysis of Grooved Journal Bearings in High-speed Hard Disk Drive Considering Thermal Effect
A micro-rotating machinery such as hard disk drive requires high efficiency and robust dynamics in high operating speed. Herringbone grooved journal bearings are widely used for this application thanks to their excellent dynamic characteristics. The clearance between sleeve and shaft is filled with fluid lubricant. However, the temperature of the fluid film rises significantly as the frictional heat, thereby the viscosity of the fluid and the clearance of hydrodynamic bearings decrease. In this article, the thermal expansion of the sleeves inner radius was determined by LUO Zais method. It shows that the variation of clearance is an important design consideration which affects the stability of the hydrodynamic bearing of a hard disk drive spindle motor.
stability characteristics herringbone grooved journal bearings Thermo-hydrodynamic analysis
Honglai LI Shuzhong LIN Jing WANG Zhiguo ZHENG Jintai LIN Zhongyu LIANG
School of Mechanical Engineering Hebei University of Technology Tianjin, China School of Mechanical and Electronic Engineering Tianjin Polytechnic University Tianjin, China Department of Basic Courses Military Traffic Institute Tianjin, China
国际会议
张家界
英文
879-882
2009-04-11（万方平台首次上网日期，不代表论文的发表时间）