Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (8): 38-43.

• Mechanical Engineering • Previous Articles     Next Articles

Influence of Air-Bearing Surface on Gas Lubrication Performances of Hard Disk Drive

Niu Rong-jun  Huang Ping   

  1. School of Mechanical Engineering , South China. Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-10-10 Online:2007-08-25 Published:2007-08-25
  • Contact: 牛荣军(1977-)，男，博士，主要从事微流体摩擦与润滑研究. E-mail:niurongjun@163.com
  • About author:牛荣军(1977-)，男，博士，主要从事微流体摩擦与润滑研究.
  • Supported by:

    国家重点基础研究发展计划资助项目( 2003 CB716205 )

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Abstract:

In order to lay a theoretical foundation for the optimized design of air-bearing surface (ABS) , a numerical algorithm for the nano-sized gas lubrication is programmed to analyze the ABSs of the positive and negative magnetic heads , and the inf1uences of ABS on the performance of magnetic head/ disk system are investigated. The results indicate that , for the positive magnetic head , the loading points of the maximum pressure and the gas load capacity play a significant role in the performance of the system , and the change of the slider configuration may decrease the maximum pressure and the gas load capacity j while for the negative magnetic head , rhe negative pressure region can be increased by altering those structures that exert obvious influence on the negative pressure , thus weakening the effect of the positive pressure. In addition , the gas stiffness cannot be ignored in the design of the hard disk drive system , and high gas stiffness contributes significantly to the stability of the system.

Key words: magnetic head/ disk system, hard disk drive, air-bearing surface, gas lubrication