| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
The bearing system on the spindle motor of HDD or DVD and BD drives used for the mobile data terminal was proposed the oil-impregnated porous sinter bearing. And we could produce the specimens in which the hydrodynamic pressure shape and the porous-controlled layer formed on the annular or the end surfaces of above mentioned bearing system. With this bearing system which is requested high speed and high precision shaft whirling at unsteady condition, it was experimentally examined to adequate the combination of thrust and radial hydrodynamic pressure shape or the specifications of its suitable shape for hydrodynamic pressure generation. As a result, we have verified that the more suitable shape is Herringbone for establishing high speed and high precision shaft whirling under exciting the vibration or the impact test.
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