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    • 32. 发明授权
    • Bearing unit, and motor using same
    • 轴承单元和电机使用相同
    • US07029179B2
    • 2006-04-18
    • US10450851
    • 2002-10-18
    • Yuji ShishidoToshio HashimotoKiyoyuki Takada
    • Yuji ShishidoToshio HashimotoKiyoyuki Takada
    • F16C17/10
    • F16C33/107F16C17/107F16C2370/12G11B19/2009
    • A bearing unit is provided which supports a shaft (51) rotatably. It includes the shaft (51), a radial bearing (55) to support the shaft (51) circumferentially, a thrust bearing (58) to support the shaft (51) at one of thrusting-directional ends of the latter, a housing (56) having disposed therein the radial bearing (55) and thrust bearing (58) supporting together the shaft (51) and which is filled with a viscous fluid (67), and a spacer member (65) disposed inside the housing (56) to keep a gap defined between the end face of the radial bearing (55) and one side of a radial projection (54) included in the shaft (51). On the end face of the radial breading (55) opposite to one side of the radial projection (54), there is formed a first dynamic pressure producing recess (63) which produces a dynamic pressure by the viscous fluid. Also, on the side of the thrust bearing (58) opposite to the other side of the radial projection (54), there is formed a second dynamic pressure producing recess (64) which produces a dynamic pressure by the viscous fluid. As the shaft (51) rotates, the viscous fluid is circulated through the first and second dynamic pressure producing recesses (63, 64) to produce a dynamic pressure between the shaft and the radial and thrust bearings, respectively. The space member (65) provided as above permits to control the gap between the radial projection (54) and first and second dynamic pressure producing recesses (63, 64), respectively, with a high accuracy.
    • 提供了一个可旋转地支撑轴(51)的轴承单元。 它包括轴(51),用于沿周向支撑轴(51)的径向轴承(55),用于在轴的一个推力方向端支撑轴(51)的推力轴承(58),壳体 56),其中设置有径向轴承(55)和支撑在一起的轴(51)并且填充有粘性流体(67)的推力轴承(58),以及设置在壳体(56)内部的间隔件(65) 以在径向轴承(55)的端面和包括在轴(51)中的径向突起(54)的一侧之间保持间隙。 在与径向突起(54)的一侧相对的径向切口(55)的端面上形成有第一动态压力产生凹部(63),其通过粘性流体产生动态压力。 此外,在与径向突起(54)的另一侧相对的止推轴承(58)侧,形成有由粘性流体产生动态压力的第二动压产生凹部(64)。 当轴(51)旋转时,粘性流体通过第一和第二动压产生凹槽(63,64)循环,以分别在轴与径向和推力轴承之间产生动态压力。 如上所述设置的空间部件65能够高精度地分别控制径向突起54和第一动力产生凹部(63,64)之间的间隙。
    • 40. 发明授权
    • Hydrodynamic pressure bearing pump with a shaft and a bearing having hydrodynamic pressure generating grooves
    • 具有轴和具有流体动压产生槽的轴承的流体动压轴承泵
    • US07381034B2
    • 2008-06-03
    • US10505090
    • 2003-12-24
    • Yuji Shishido
    • Yuji Shishido
    • F04B17/04
    • F04D29/047F04D3/00F04D13/0633F04D13/064
    • A hydrodynamic pressure bearing type pump includes a main body having a fluid flow inlet formed at one end portion thereof and a fluid flow outlet formed at the other end portion thereof and a rotating portion disposed within a fluid flow passage of the fluid within the main body to generate hydrodynamic pressure to let the fluid flow into the fluid flow inlet and to let the fluid flow from the fluid flow outlet to the outside. The rotating portion includes a shaft, a hydrodynamic pressure bearing for generating hydrodynamic pressure to let the fluid flow into the fluid flow inlet and to let the fluid flow from the fluid flow outlet to the outside when the shaft is rotated and a rotation force generating portion disposed within the main body to generate rotation force for rotating the shaft when it is energized.
    • 一种流体动压轴承型泵包括主体,该主体具有在其一个端部处形成的流体流动入口和形成在其另一端部的流体流出口,以及设置在主体内的流体的流体流动通道内的旋转部分 以产生流体动力学压力以使流体流入流体流入口并使流体从流体流出口流到外部。 旋转部分包括轴,用于产生流体动力压力以使流体流入流体流入口的流体动力学压力轴承,并且当轴旋转时使流体从流体流出口流出到外部;旋转力产生部分 设置在主体内以产生用于在轴被通电时旋转轴的旋转力。