FLUID DYNAMIC PRESSURE BEARING APPARATUS AND SPINDLE MOTOR
    1.
    发明申请
    FLUID DYNAMIC PRESSURE BEARING APPARATUS AND SPINDLE MOTOR 审中-公开
    流体动力压力轴承装置和主轴电机

    公开(公告)号:US20140097717A1

    公开(公告)日:2014-04-10

    申请号:US14029072

    申请日:2013-09-17

    申请人: MINEBEA CO., LTD.

    IPC分类号: F16C32/06 H02K7/08

    摘要: There is provided a fluid dynamic pressure bearing apparatus including a shaft, a bearing sleeve rotatably supporting the shaft, and a lubricating oil filled between the shaft and the bearing sleeve, wherein at least one of the shaft and the bearing sleeve is formed of a copper alloy containing 0.8 wt % to 5 wt % of lead, and a base oil of the lubricating is a member selected from the group consisting of monoester, dibasic acid diester, diol ester and mixtures thereof, and the lubricating oil contains 0.1 wt % to 1 wt % of condensed phosphate ester. The fluid dynamic pressure bearing apparatus is capable of suppressing the hydrolysis of the lubricating oil, and the wear of the shaft and the bearing sleeve.

    摘要翻译: 提供了一种流体动压轴承装置,其包括轴,可旋转地支撑轴的轴承套和填充在轴和轴承套之间的润滑油,其中轴和轴承套中的至少一个由铜形成 含有0.8重量%〜5重量%的铅的合金,润滑油的基础油是选自单酯,二元酸二酯,二醇酯及其混合物的成分,润滑油含有0.1重量%〜1重量% wt%的缩合磷酸酯。 流体动压轴承装置能够抑制润滑油的水解,以及轴和轴承套的磨损。