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| Abstract: |
| When the hard disk is running, the cantilever of the magnetic head imposes a certain preload on the slider of the magnetic head to form a wedge space with the disk. When the disk rotates, the viscous gas enters the convergence gap so that the hydrodynamic pressure generates balance with the force acting on the cantilever, ensuring that the magnetic head flies above the disk in a stable altitude and forms a stable air film between the magnetic head and the disk called air bearing. When the flight altitude is low, the bulge on the disk surface will affect the pressure distribution of air bearing. Furthermore, the pressure affects the heat flux of air bearing by influencing the heat transfer parameters, such as thermal conductivity, dynamic viscosity, gas density, and the molecular free path of the gas. In this paper, heat transfer parameters influence on gas film heat transfer were explored. Based on this, flathead slider and Tri-pad barotropic magnetic head slider were compared , and the effects of disk operating conditions at the average temperature of air bearing were also studied, such as pitch and roll angle of the magnetic head slider, the disk's speed, and the bulge on disk surface. |
| Key words: air bearing heat transfer Tri-pad barotropic head slider |
| DOI：10.11916/j.issn.1005-9113.19104 |
| Clc Number:TP333.3 |
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| Descriptions in Chinese: |
| 磁盘表面凸起和运行工况对磁盘气膜传热的影响 曾秦阳，敖宏瑞，姜洪源 （哈尔滨工业大学 机电工程学院，哈尔滨 150001） 摘要：硬盘运行时，磁头的悬臂对磁头的滑块施加一定的预紧力，与硬盘形成楔形空间。当磁盘旋转时，粘性气体进入收敛间隙，使得流体动压与作用在悬臂上的力产生平衡，确保磁头以稳定的高度在磁盘上方飞行，从而磁头和磁盘之间形成稳定的空气膜，即空气轴承。当磁头飞行高度较低时，磁盘表面的凸起会影响空气轴承的压力分布。此外，压力通过影响热传导系数、动态粘度、气体密度和气体分子自由程等传热参数来影响空气轴承的热流密度。本文研究了平板磁头和Tri-pad正压磁头以及磁盘凸起的尺对磁头与磁盘间气体传热的影响并在此基础上，研究了磁头的飞行高度、磁头和磁盘形成的角度和磁盘盘速对空气轴承平均温度的影响。 关键词：空气轴承；气体传热；Tri-pad正压型磁头 |
