F-0218 高速スピンドル用水潤滑コニカル軸受に関する研究(S35-2 新しい潤滑技術への挑戦)(S35 トライボロジーと機械要素の新たな展開)

概要

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This paper describes the characteristics of water-lubricated conical bearings for high-speed spindles. The bearings are intended to apply to spindles for drilling small holes of printed circuit boards. Pressurized water is first fed to the inside of the rotating shaft and supplied to spiral grooves on the shaft surface through feeding holes. Therefore, water pressure is greatly increased at the outlets of feeding holes due to the centrifugal force by shaft rotation. Furthermore, water pressure also increases by viscous pump effect of spiral grooves. The static characteristics and the threshold of instability are theoretically predicted and calculated results are compared with experimental ones. It was found that the proposed conical bearings have excellent stability at high speeds.
一般社団法人日本機械学会の論文
2001-08-22