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    Fluid retention principles for hydrodynamic bearings
    3.
    发明授权
    Fluid retention principles for hydrodynamic bearings 失效
    流体动力学轴承的流体保留原理

    公开(公告)号：US5524986A

    公开(公告)日：1996-06-11

    申请号：US284126

    申请日：1994-08-02

    申请人： Hans Leuthold ,  Coda H. Pan ,  David J. Jennings ,  Lakshman Nagarathnam ,  Raquib U. Khan ,  Wesley R. Clark ,  Gunter Heine

    发明人： Hans Leuthold ,  Coda H. Pan ,  David J. Jennings ,  Lakshman Nagarathnam ,  Raquib U. Khan ,  Wesley R. Clark ,  Gunter Heine

    IPC分类号： F16C33/10 ,  F16C33/72 ,  F16C33/74 ,  G11B19/20 ,  G11B33/14 ,  F16C32/06

    CPC分类号： F16C33/74 ,  F16C17/026 ,  F16C17/045 ,  F16C33/103 ,  F16C33/107 ,  G11B19/2009 ,  G11B33/148 ,  F16C2370/12 ,  G11B33/1446

    摘要： A hydrodynamic bearing incorporates a flexible membrane at one end of the fluid gap in the hydrodynamic bearing. If voids exist in the fluid, and if changes in the size of these voids or bubbles occur with changes in temperature or pressure in which the disc drive is being used, then the volume of the fluid will change, and increase relative to the change in size of the volume of the surrounding physical part. The flexible membrane will yield to the increased pressure of the increasing volume of the fluid. The membrane essentially acts as a spring whose spring force is overcome by the pressure created by or accompanying a increase in volume of the fluid. As this happens, the spring force of the membrane is overcome, the membrane relaxes and forms a bladder, effectively increasing the volume in which the lubricating fluid is contained, and preventing its escape or being forced out of the inner region of the bearing. In this way, the fluid remains in the bearing and will not enter the surrounding atmosphere, nor will it be lost from the journal bearing region so that the hydrodynamic bearing is not as effective, when the temperature decreases or the pressure drops.

    摘要翻译： 流体动力轴承在流体动力轴承中的流体间隙的一端处包含柔性膜。 如果流体中存在空隙，并且如果在使用盘驱动器的温度或压力的变化中发生这些空隙或气泡的尺寸的变化，则流体的体积将改变，并且相对于 周围物体的体积大小。 柔性膜将产生增加的流体体积的增加的压力。 膜基本上起弹簧的作用，其弹簧力由流体的体积增加产生的压力或伴随着流体体积的增加而克服。 发生这种情况时，膜的弹簧力被克服，膜松弛并形成气囊，有效地增加容纳润滑液的体积，并防止其逃逸或被迫离开轴承的内部区域。 以这种方式，流体保持在轴承中并且不会进入周围的大气，也不会从轴颈轴承区域中流失，使得当温度降低或压力下降时，流体动力轴承不那么有效。

    Squeeze film damping for a hard disc drive
    6.
    发明授权
    Squeeze film damping for a hard disc drive 失效
    挤压胶片阻尼的硬盘驱动器

    公开(公告)号：US06239943B1

    公开(公告)日：2001-05-29

    申请号：US08727858

    申请日：1996-10-08

    申请人： David John Jennings ,  Hans Leuthold ,  Lakshman Nagarathnam ,  Steve Gonzalez ,  Dean A. Tarrant ,  Gunter Heine ,  Raquib U. Khan

    发明人： David John Jennings ,  Hans Leuthold ,  Lakshman Nagarathnam ,  Steve Gonzalez ,  Dean A. Tarrant ,  Gunter Heine ,  Raquib U. Khan

    IPC分类号： G11B3308

    CPC分类号： G11B25/043 ,  G11B33/08

    摘要： A spindle motor is described having a motor stator, a motor rotor, the motor being energized to cause rotation of the rotor supporting a single disc or a stack of discs which is mounted in such a way that the rotating bottom or top (or both) disc surface is closely adjacent to a stationary disc drive casting surface. The squeeze film action in the remaining air gap provides significant damping of the disc vibration. Typical implementation use air gaps of 0.004″-0.006″ for 2½″ drives and 0.006″-0.10″ for 3½″ drives.

    摘要翻译： 主轴电动机被描述为具有电动机定子，电动机转子，电动机被激励以引起支撑转子的转子，所述转子支撑单个盘或一堆盘，其以这样的方式安装，使得旋转的底部或顶部（或两者） 盘表面与固定盘驱动铸造表面紧密相邻。 剩余气隙中的挤压膜作用提供了盘振动的显着阻尼。 典型的实施方式，对于2½“驱动器使用0.004” - 0.006“的空气间隙，对于3½”驱动器使用0.006“ - 0.10”的气隙。

    Radial capillary seal for fluid dynamic bearing motors
    8.
    发明授权
    Radial capillary seal for fluid dynamic bearing motors 有权
    用于流体动力轴承电机的径向毛细管密封

    公开(公告)号：US07241051B2

    公开(公告)日：2007-07-10

    申请号：US11151878

    申请日：2005-06-13

    申请人： Alan L. Grantz ,  Raquib U. Khan ,  Norbert Steven Parsoneault

    发明人： Alan L. Grantz ,  Raquib U. Khan ,  Norbert Steven Parsoneault

    IPC分类号： F16C17/10

    CPC分类号： F16C17/105 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2009

    摘要： A seal with a primary axis lying in the radial direction so that the fluid bearing is primarily extending in the axial direction between the rotating shaft and surrounding sleeve is disclosed. The capillary seal is positioned with an opening adjacent an end of the fluid bearing gap, and comprises two walls which diverge as they extend radially away from the fluid bearing so that the fluid held in the radial capillary seal is maintained adjacent an end of the gap, while the size of the reservoir defined by the diverging walls provides a large reservoir volume. The seal uses an additional capillary defined by a narrow annulus between the rotating shaft and a seal wall end. The narrow annulus establishes very high shock resistance preventing fluid loss past the outer axial wall of the radially capillary seal, and defines a small surface area from which evaporation can occur.

    摘要翻译： 公开了一种具有主轴线位于径向方向上的密封件，使得流体轴承主要在轴向方向上在旋转轴和周围套筒之间延伸。 毛细管密封件定位成具有邻近流体轴承间隙的端部的开口，并且包括两个壁，当它们从流体轴承径向延伸时分开，使得保持在径向毛细管密封件中的流体保持在间隙的端部附近 而由发散壁限定的储存器的尺寸提供了大的储存器容积。 密封件使用由旋转轴和密封壁端之间的窄环形物限定的附加毛细管。 狭窄的环形区域具有非常高的抗冲击性，可以防止流体通过径向毛细管密封件的外部轴向壁的流体损失，并且限定了可能发生蒸发的小的表面积。

    FDB motor with tapered shaft for improved pumping efficiency
    9.
    发明授权
    FDB motor with tapered shaft for improved pumping efficiency 有权
    带锥形轴的FDB电机，提高泵送效率

    公开(公告)号：US07378771B2

    公开(公告)日：2008-05-27

    申请号：US11083820

    申请日：2005-03-17

    申请人： Jeffry A. Leblanc ,  Troy M. Herndon ,  Mohammad M. Ameen ,  Raquib U. Khan

    发明人： Jeffry A. Leblanc ,  Troy M. Herndon ,  Mohammad M. Ameen ,  Raquib U. Khan

    IPC分类号： H02K5/16

    CPC分类号： F16C3/02 ,  F16C33/107 ,  F16C2370/12 ,  H02K5/1677

    摘要： For motors having a journal with one or more groove regions and a shaft for relative rotation in the journal, aspects include providing a dual tapered shaft. The shaft may be tapered by the application of a wear resistant coating at least opposite the groove regions. The coating introduces a shaft taper from near a top end and from near a bottom end towards the shaft middle. The shaft taper may provide for improved pumping efficiency. The coating may be applied in various processes such as chemical vapor deposition or physical vapor deposition to establish a thickness gradient of coating material from near the top end and near the bottom end towards the shaft middle. In one example, the coating includes a DLC coating. Additionally, shaft portions may be shielded to prevent coatings thereon.

    摘要翻译： 对于具有带有一个或多个凹槽区域的轴颈和用于在轴颈中相对旋转的轴的马达，方面包括提供双锥形轴。 轴可以通过施加至少相对于凹槽区域的耐磨涂层而变细。 涂层从顶端附近和靠近底端的轴中心引入轴锥。 轴锥度可以提供改善的泵送效率。 该涂层可以以各种方法施加，例如化学气相沉积或物理气相沉积，以建立涂层材料的厚度梯度，从顶端附近和底端附近向轴中间附近。 在一个实例中，涂层包括DLC涂层。 此外，可以屏蔽轴部分以防止其上的涂层。

    Disc drive contamination reduction utilizing an inert coating
    10.
    发明授权
    Disc drive contamination reduction utilizing an inert coating 有权
    使用惰性涂层的光盘驱动器污染减少

    公开(公告)号：US06417987B1

    公开(公告)日：2002-07-09

    申请号：US09704112

    申请日：2000-10-30

    申请人： Raquib U. Khan ,  Mohammad M. Ameen

    发明人： Raquib U. Khan ,  Mohammad M. Ameen

    IPC分类号： G11B1702

    CPC分类号： G11B33/1453 ,  G11B25/043

    摘要： A non-reactive hard coating of carbon or ceramic is applied to the major components of the spindle motor which are exposed to the atmosphere internal to the hard disc drive. By having such a thin layer of carbon or other ceramic coating, it will protect against outgassing of motor components and create a neutral or non-reactive surface that does not promote corrosion. The coating thickness can be preferably in the order of nanometers to microns depending upon the drive design and the operating conditions.

    摘要翻译： 将碳或陶瓷的非反应性硬涂层施加到主轴电机的主要部件，这些部件暴露于硬盘驱动器内部的大气中。 通过具有这样一层薄的碳或其他陶瓷涂层，它将防止电动机部件脱气，并产生不会促进腐蚀的中性或非反应性表面。 取决于驱动设计和操作条件，涂层厚度可以优选为数毫米至数量级。