磁头表面结构对硬盘驱动器气膜润滑特性的影响

通过编制适用于纳米级气膜润滑的数值算法,对正压和负压两种类型的磁头结构进行了数值分析,探讨了磁头结构中各个部分对磁头/磁盘系统的影响,以期为磁头表面结构的优化设计提供理论依据.研究表明:对于正压型磁头结构,气膜承载力和最大压力的位置对系统特性有着重要的影响,可通过改变滑轨结构分布来减小这两项性能参数;对于负压型磁头结构,可以通过改变对负压产生明显影响的结构部分来增大负压力的区域,以此消弱正压力的作用;此外,在设计磁头结构时不能忽略气膜刚度的影响,大的气膜刚度对磁头飞行的稳定性起着重要的作用.

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

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 influences 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;while for the negative magnetic head,the 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.