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    • 5. 发明专利
    • Dynamic pressure bearing device
    • 动态压力轴承装置
    • JP2005321089A
    • 2005-11-17
    • JP2005017068
    • 2005-01-25
    • Ntn CorpNtn株式会社
    • MIZUTANI TOSHIYUKI
    • F16C17/10F16C17/02F16C23/02F16C33/74H02K7/08
    • PROBLEM TO BE SOLVED: To reduce the axial dimension of a seal space.
      SOLUTION: This dynamic pressure bearing device comprises a seal member 9 fixed to a specified position on an outer peripheral surface 2a1 of a shaft portion 2a. During the rotation of a shaft member 2, a lower end surface 9b of the seal member 9 is opposite an upper end surface 8b of a bearing sleeve 8 with a specified thrust bearing clearance in between to form a second thrust bearing clearance T2. Further, an outer peripheral surface 9a on the seal member 9 forms a seal space S with a specified volume between itself and an upper end section inner peripheral surface 7a1 of a housing 7.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:减小密封空间的轴向尺寸。 解决方案:该动态压力承载装置包括固定在轴部2a的外周面2a1上的特定位置的密封构件9。 在轴构件2的旋转期间,密封构件9的下端面9b与轴承套筒8的上端面8b相对,在其间具有规定的推力轴承间隙,形成第二止推轴承间隙T2。 此外,密封构件9上的外周面9a在其与壳体7的上端部内周面7a1之间形成具有规定体积的密封空间S.版权所有(C)2006,JPO&NCIPI