Research on the Influential Factors of Flying Characteristics of a Slider in a Filled-Gas Hard Disk Drive
Abstract: In order to reduce the gas resistance of the high speed rotating disk and the impact and vibration of internal structure in a hard disk drive (HDD), and improve the storage density and working stability of a HDD, some kinds of gases with a low density are considered to fill inside a sealed HDD. The filled-gas HDD has some advantages of a large capacity, energy saving and heat dissipation performance. In an operating HDD, the flying characteristics of the slider, including the bearing capacity W, the pressure center Xc and Yc, have an important effect on the working stability of the HDD. In present paper, the effects of the gas physical properties filled inside the HDD, surface roughness, disk rotational speed, flying height and pitch angle, on flying characteristics of the slider, are studied. The results show that the W of the slider increases with the increase of the disk rotational speed, the decrease of the flying height, the decrease of the pitch angle and the decrease of proportion of helium gas in a mixed gas. The Xc decreases with the increase of the disk rotational speed, the increase of flying height, the decrease of the pitch angle. For different disk rotational speed, flying height, pitch angle, and proportion of helium gas in a mixed gas, the Yc keeps almost unchanged. For different direction of roughness (γ), the roughness height (σ) has different effect on W, Xc and Yc.
文章引用: 杨廷毅 , 白雪 , 吕传毅 , 郭前建 (2017) 充气硬盘磁头滑块飞行特性影响因素研究。 流体动力学， 5， 91-101. doi: 10.12677/IJFD.2017.53011
Park, K.S. (2016) The Optimal Helium Fraction for Air-Helium Gas Mixture HDDs. Micro System Technologies, 22, 1307-1314.
White, J. (2014) The Gas Bearing Interface of Op-posed Recording Heads in a Disk Drive Utilizing Helium and Thin Titanium Foil Disks. Journal of Tribology, 36, Article ID: 041901.
Bouchard, G. and Talke, F.E. (1986) Non-Repeatable Flutter of Magnetic Recording Disks. IEEE Transactions On Magnetics, 22, 1019-1021.
 Jacoby, J.E. and Gustafson, J.R. (2012) Sealed Laminated Electrical Connector for Helium Filled Disk Drive. United States Patent No. US 8194348 B2.
Zhou, W.D., Liu, B., Yu, S.K., Hua, W. and Gonzaga, L. (2010) Effects of Gas Physical Properties on Flying Performance of Air Bearing Slider. IEEE Transactions on Magnetics, 46, 1389-1392.
Liu, N., Zheng, J.L. and Bogy, D.B. (2009) Thermal Fly-ing-Height Control Sliders in Hard Disk Drives Filled with Air-Helium Gas Mixtures. Applied Physics Letters, 95, Arti-cle ID: 213505.
Liu, N., Zheng, J.L. and Bogy, D.B. (2011) Thermal Fly-ing-Height Control Sliders in Air-Helium Gas Mixtures. IEEE Transactions on Magnetics, 47, 100-104.
Aruga, K., Suwa, M., Shimizu, K. and Watanabe, T. (2007) A Study on Positioning Error Caused by Flow Induced Vibration Using Helium Filled Hard Disk Drives. IEEE Transactions on Magnetics, 43, 3750-3755.
Kil, S.W., Humphrey, J.A.C. and Haj-Hariri, H. (2012) Experi-mental Study of the Flow-Structure Interactions in an Air-Or Helium-Filled Hard Disk Drive Model. Micro System Technologies, 18, 43-56.
Kil, S.W., Humphrey, J.A.C. and Haj-Hariri, H. (2012) Numerical Study of the Flow-Structure Interactions in Air-or Helium-Filled Simulated Hard Disk Drives. Micro System Technolo-gies, 18, 57-75.
 Kil, S.W., Humphrey, J.A.C. and Haj-Hariri, H. (2013) Turbu-lence Intensity Inversion Induced by the Mass-Reducing Hole in an Air or Helium Filled Hard Disk Drive. Micro System Technologies, 19, 31-42.
 王玉娟, 陈云飞, 庄苹. 表面粗糙度对磁头磁盘系统静态特性的影响[J]. 机械工程学报, 2002, 38(1): 22-26.
Ng, K.K., Seet, H.L., Hua, W., Yu, S.K., Ng, V. and Liu, B. (2012) Effect of Interfacial Roughness on Slider-Disk Interactions at Near-Contact Regime. IEEE Transactions on Magnetics, 48, 4459-4462.
Yoon, S.J., Son, S.H. and Choi, D.H. (2008) Head Slider De-signs Considering Dynamic L/UL Systems for 1-in Disk Drives. IEEE Transactions on Magnetics, 44, 151-156.
 史宝军, 季家东, 杨廷毅. 表面粗糙度对硬盘超低飞高气膜静态特性的影响[J]. 机械工程学报, 2011, 47(11): 93- 99.
 史宝军, 季家东, 杨廷毅. 粗糙度模式对硬盘气膜承载特性的影响[J]. 工程力学, 2012, 29(8): 313-318.
 史宝军, 季家东, 杨廷毅, 于慧. 磁盘速度与容纳系数对硬盘气膜静态特性的影响[J]. 机械工程学报, 2012, 48(23): 95-101.
Shi, B.J. and Yang, T.Y. (2010) Simpli-fied Model of Reynolds Equation with Linearized Flow Rate for Ultra-Thin Gas Film Lubrication in Hard Disk Drives. Micro System Technologies, 16, 1727-1734.
Shi, B.J., Yang, T.Y., Ge, P.Q. and Bai, X. (2012) Adaptive Grid Generation Technique of Sub-5nm Flying Height Air Bearing Slider with Clearance Discontinuities. Micro System Technologies, 18, 2017-2026.
Yang, T.Y., Shu, D.W., Shi, B.J. and Bai, X. (2016) Effects of Disk Surface Roughness on Static Flying Characteristics of Air Bearing Slider by Using a Combined Method of Reyn-olds Equation and Rough Disk Surface. Micro System Technologies, 22, 2295-2306.