Journal of South China University of Technology (Natural Science Edition) ›› 2019, Vol. 47 ›› Issue (3): 44-52.doi: 10.12141/j.issn.1000-565X.180244

• Mechanical Engineering • Previous Articles     Next Articles

Analysis of the Mechanical Properties of Head /Disk Interface in Air-Helium Gas Mixtures

 TANG Zhengqiang1 ZHOU Dongdong1 JIA Tong1 ZHANG Chuanwei 2   

  1.  1． School of Mechanical Engineering，Guizhou University，Guiyang 550025，Guizhou，China; 2． MIIT Key Laboratory of Aerospace Bearing Technology and Equipment，Harbin Institute of Technology，Harbin 150001，Heilongjiang，China
  • Received:2018-05-24 Revised:2018-10-08 Online:2019-03-25 Published:2019-01-31
  • Contact: 唐正强( 1986-) ，男，博士，副教授，主要从事磁头磁盘界面研究 E-mail:zhengqiangtang@126.com
  • About author:唐正强( 1986-) ，男，博士，副教授，主要从事磁头磁盘界面研究
  • Supported by:
     Supported by the Natural Science Foundation of China ( 51505093，51605113) and the Science and Technology Innovation Project for Overseas Scholars of Guizhou Province( 〔2016〕01)

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Abstract: Helium can improve storage density and reduce power consumption of hard disk drives． In air-helium gas mixtures，the percentage of helium will affect the air bearing force of a slider and the air shearing force of a disk surface，which leads to lubricant transfer at the head /disk interface． In this research，the finite element method was used to solve the modified Ｒeynolds equation． The air bearing force of the slider and the air shearing force of the disk surface in air-helium gas mixture were calculated． The effect of flying gesture，disk velocity，and environmental temperature on the mechanical properties of the slider and the disk were investigated． The results show that，in air-helium gas mixtures，the air bearing force of the slider and the air shearing force of the disk surface decrease with an increase in flying height． The air bearing force and the shearing force increase with an increase in disk velocity and temperature． With an increase in pitch angle and roll angle，the flying height decreases，which leads to an increase in the air bearing force． However，the effect of the pitch angle and the roll angle on the air shearing force of the disk surface in air-helium gas mixtures is negligible．

Key words: head disk interface, air-helium gas mixture, air bearing force, air shearing force

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