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    • 3. 发明授权
    • Spindle motor with fluid dynamic bearing having a journal bearing in
combination with a conical bearing
    • 具有流体动力轴承的主轴电机具有与锥形轴承组合的轴颈轴承
    • US6137650A
    • 2000-10-24
    • US981338
    • 1997-12-19
    • Gunter Karl HeineMohamed Mizanur RahmanRaquib Uddin KhanHans Leuthold
    • Gunter Karl HeineMohamed Mizanur RahmanRaquib Uddin KhanHans Leuthold
    • G11B5/48F16C17/10F16C17/26F16C33/10F16C33/74G11B19/20H02K7/08G11B17/08
    • G11B19/2009F16C17/102F16C33/107F16C33/745G11B19/2018G11B19/2036F16C2370/12
    • A hydrodynamic fluid bearing useful in a bearing cartridge which cartridge may be incorporated into a spindle motor or the like, where the bearing includes a shaft, a conical bearing supported on the shaft, and journal bearings located at least on one side and typically both above and below the conical bearing. A sleeve is mounted for rotation relative to the shaft and defines, in cooperation with the shaft, the gaps necessary for both the conical hydrodynamic bearing and the axial, journal bearings. At an end of the shaft, capillary seals are defined between the sleeve and the shaft so that fluid does not escape from the hydrodynamic bearing. The shaft itself includes a central hole, with bores communicating with both the conical bearing and the journal bearings to maintain appropriate pressure balances.In a further desirable feature, in some embodiments the diameter of one end of the shaft can be made greater than the diameter of the other end of the shaft. This allows for making the gaps between the shaft and the surrounding sleeve or journal to be greater where the diameter of the fixed shaft is greater, reducing the need for tight tolerances within at least part of the hydrodynamic bearing. Preferably the top end of the shaft (i.e. the end of the shaft adjacent the wider end of the conical bearing) has the journal bearing with greater diameter.
    • PCT No.PCT / US97 / 23925 Sec。 371 1997年12月19日第 102(e)日期1997年12月19日PCT 1997年12月19日PCT公布。 第WO98 / 48419号公报 日期1998年10月29日一种用于轴承筒的流体动力学流体轴承,其中可以将筒体并入到主轴电机等中,其中轴承包括轴,支撑在轴上的锥形轴承和至少位于一个上的轴颈轴承 并且通常在锥形轴承的上方和下方。 安装套筒相对于轴线旋转,并与轴配合限定锥形流体动力轴承和轴向轴颈轴承所需的间隙。 在轴的端部,在套筒和轴之间限定毛细管密封,使得流体不会从流体动力轴承逸出。 轴本身包括中心孔,孔与锥形轴承和轴颈轴承连通,以保持适当的压力平衡。 在另一个期望的特征中,在一些实施例中,轴的一端的直径可以制成大于轴的另一端的直径。 这允许在固定轴的直径更大的情况下使得轴和周围的套筒或轴颈之间的间隙更大,减少了至少部分流体动力轴承内的严格公差的需要。 优选地,轴的顶端(即,与锥形轴承的较宽端相邻的轴的端部)具有较大直径的轴颈轴承。
    • 9. 发明授权
    • In-hub spindle motor with separate fluid dynamic bearings
    • 内置主轴电机,带独立的流体动力轴承
    • US6118620A
    • 2000-09-12
    • US60225
    • 1998-04-14
    • Alan Lyndon GrantzNorbert Steven ParsoneaultSamnathan MurthyHans LeutholdMohamed Mizanur Rahman
    • Alan Lyndon GrantzNorbert Steven ParsoneaultSamnathan MurthyHans LeutholdMohamed Mizanur Rahman
    • F16C17/10F16C33/10F16C33/74G11B19/20H02K5/124G11B17/02F16C32/06
    • F16C17/105F16C33/103F16C33/107F16C33/74G11B19/2009H02K5/124F16C2370/12
    • A hydrodynamic bearing system where the bearing includes a shaft and two independent bearings, comprising a top cone or bi-sphere and a bottom cone or bi-sphere separated by a segment of the shaft. The bearing includes a hub supported bearing element rotating around the shaft and the shaft supported top cone and bottom cone; complementary surfaces of said bearing element and said cone define a narrow gap between the bearing support element for the bearing fluid. Sealing plates or seal elements define a fluid gap with a radially extending face of the cone; a gap also exists between an interior surface portion of each cone and the shaft. These gaps are connected so that separate flow paths are established, one around the top cone or bi-sphere and one around the bottom cone or bi-sphere. By providing two independent bearings, the stator can be mounted to the shaft, facing magnets supported on the hub to form an in-hub motor. When the load or RPM changes, the fluid pressure or movement in each bearing may change but the function of the bearing and its ability to provide stiffness and stability to the system will not be lessened.
    • 一种流体动力轴承系统,其中轴承包括轴和两个独立的轴承,包括顶部锥体或双球体以及由轴的一部分分开的底部锥体或双球体。 轴承包括围绕轴旋转的轮毂支撑的轴承元件和轴支撑的顶锥和底锥; 所述轴承元件和所述锥体的互补表面限定用于轴承流体的轴承支撑元件之间的窄间隙。 密封板或密封元件与锥体的径向延伸的表面限定流体间隙; 在每个锥体的内表面部分和轴之间也存在间隙。 这些间隙被连接,使得形成单独的流动路径,一个围绕顶部圆锥体或双球体,一个围绕底部锥体或双球体。 通过提供两个独立的轴承,定子可以安装到轴上,面向支撑在轮毂上的磁体,以形成内轮毂电机。 当负载或RPM变化时,每个轴承中的流体压力或运动可能发生变化,但是轴承的功能及其对系统提供刚度和稳定性的能力将不会降低。
    • 10. 发明授权
    • In-hub spindle motor with separate fluid dynamic bearings
    • 内置主轴电机,带独立的流体动力轴承
    • US06583952B1
    • 2003-06-24
    • US09621938
    • 2000-07-24
    • Alan Lyndon GrantzNorbert Steven ParsoneaultSamnathan MurthyHans LeutholdMohamed Mizanur Rahman
    • Alan Lyndon GrantzNorbert Steven ParsoneaultSamnathan MurthyHans LeutholdMohamed Mizanur Rahman
    • G11B1702
    • F16C17/105F16C33/103F16C33/107F16C33/74F16C2370/12G11B19/2009H02K5/124
    • A hydrodynamic bearing system where the bearing includes a shaft and two independent bearings, including a top cone or bi-sphere and a bottom cone or bi-sphere separated by a segment of the shaft. The bearing includes a hub supported bearing element rotating around the shaft and the shaft supported top cone and bottom cone; complementary surfaces of the bearing element and the cone define a narrow gap between the bearing support element for the bearing fluid. Sealing plates or seal elements define a fluid gap with a radially extending face of the cone; a gap also exists between an interior surface portion of each cone and the shaft. These gaps are connected so that separate flow paths are established, one around the top cone or bi-sphere and one around the bottom cone or bi-sphere. By providing two independent bearings, the stator can be mounted to the shaft, facing magnets supported on the hub to form an in-hub motor. When the load or RPM changes, the fluid pressure or movement in each bearing may change but the function of the bearing and its ability to provide stiffness and stability to the system will not be lessened.
    • 一种流体动力轴承系统,其中轴承包括轴和两个独立的轴承,包括顶部锥体或双球体以及由轴的一部分分隔的底部锥体或双球体。 轴承包括围绕轴旋转的轮毂支撑的轴承元件和轴支撑的顶锥和底锥; 轴承元件和锥体的互补表面限定用于轴承流体的轴承支撑元件之间的窄间隙。 密封板或密封元件与锥体的径向延伸的表面限定流体间隙; 在每个锥体的内表面部分和轴之间也存在间隙。 这些间隙被连接,使得形成单独的流动路径,一个围绕顶部圆锥体或双球体,一个围绕底部锥体或双球体。 通过提供两个独立的轴承,定子可以安装到轴上,面向支撑在轮毂上的磁体,以形成内轮毂电机。 当负载或RPM变化时,每个轴承中的流体压力或运动可能发生变化,但是轴承的功能及其对系统提供刚度和稳定性的能力将不会降低。