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15 条记录 (耗时 0.031 秒)

    Coaxial, multiple-shaft ferrofluid seal apparatus
    7.
    发明授权
    Coaxial, multiple-shaft ferrofluid seal apparatus 失效
    同轴多轴铁磁流体密封装置

    公开(公告)号：US4575102A

    公开(公告)日：1986-03-11

    申请号：US673550

    申请日：1984-11-20

    申请人： Kuldip Raj ,  Hanumaiah L. Gowda

    发明人： Kuldip Raj ,  Hanumaiah L. Gowda

    IPC分类号： F16J15/43 ,  F16J15/40

    CPC分类号： F16J15/43

    摘要： A compact, coaxial multiple-shaft ferrofluid seal apparatus which comprises: a housing; a central shaft and magnetically permeable coaxial shafts about the central shaft, the coaxial shafts having a pair of spaced apart nonmagnetically permeable insulator shaft sections; magnetically permeable bearings to support each shaft; pole piece elements to provide radial gaps within the inner or outer shaft surfaces; ferrofluid disposed in the radial gaps to provide a seal apparatus for the shafts of designed pressure capacity; and a single radially polarized permanent magnet to provide a source of magnetic flux for the seal apparatus.

    摘要翻译： 一种紧凑，同轴的多轴铁磁流体密封装置，包括：壳体; 中心轴和中心轴的导磁同轴轴，所述同轴轴具有一对间隔开的非磁性可渗透的绝缘体轴部分; 导磁轴承支承各轴; 极片元件以在内轴表面或外轴表面内提供径向间隙; 设置在径向间隙中的铁磁流体为轴设计的压力容量提供密封装置; 和单个径向极化永磁体，以提供用于密封装置的磁通源。

    Radially polarized multiple-stage ferrofluid seal apparatus
    8.
    发明授权
    Radially polarized multiple-stage ferrofluid seal apparatus 失效
    径向极化多级铁磁流体密封装置

    公开(公告)号：US4526382A

    公开(公告)日：1985-07-02

    申请号：US606586

    申请日：1984-05-03

    申请人： Kuldip Raj ,  Hanumaiah L. Gowda

    发明人： Kuldip Raj ,  Hanumaiah L. Gowda

    IPC分类号： F16C33/82 ,  F16J15/43 ,  G11B19/20 ,  F16J15/40

    CPC分类号： F16J15/43

    摘要： A compact, low cost, radially polarized multiple-stage ferrofluid seal apparatus which comprises a magnetically permeable housing, a magnetically permeable shaft to be sealed extending through the housing, one or more radially polarized permanent magnets to define a plurality of separate, spaced apart radial gaps between one polarized end of the permanent magnet and the surface of the shaft, ferrofluid in the radial gaps to define one or more separate, spaced apart ferrofluid O-ring seals about the surface of the shaft and a magnetically permeable bearing assembly adjacent to and in a magnetic flux relationship with at least one of the radial polarized magnets wherein the magnetic flux circuit extends between the radial polarized magnet, the housing, the bearing assembly, the shaft, and the ferrofluid in the radial gaps.

    摘要翻译： 一种紧凑，低成本的径向偏振多级铁磁流体密封装置，其包括导磁壳体，待透过轴的待密封的延伸穿过壳体的一个或多个径向极化的永磁体，以限定多个分开的间隔开的径向 永磁体的一个极化端与轴的表面之间的间隙，在径向间隙中的铁磁流体，以限定围绕轴表面的一个或多个分离的间隔开的铁磁流体O形环密封件和与磁体 与至少一个径向极化磁体的磁通关系中，其中磁通电路在径向间隙中在径向极化磁体，壳体，轴承组件，轴和铁磁流体之间延伸。

    Compact ferrofluidic electrically conducting sealed bearing
    9.
    发明授权
    Compact ferrofluidic electrically conducting sealed bearing 失效
    紧凑型铁氟龙导电密封轴承

    公开(公告)号：US4898480A

    公开(公告)日：1990-02-06

    申请号：US263539

    申请日：1988-10-27

    申请人： Kuldip Raj ,  Hanumaiah L. Gowda ,  Ronald Moskowitz

    发明人： Kuldip Raj ,  Hanumaiah L. Gowda ,  Ronald Moskowitz

    IPC分类号： F16C33/10 ,  F16C33/66 ,  F16C33/76 ,  F16C33/82 ,  F16J15/43 ,  G11B19/20

    CPC分类号： G11B19/2009 ,  F16C33/6644 ,  F16C33/765 ,  F16J15/43 ,  F16C2370/12 ,  Y10S277/919

    摘要： A sealed, rolling element bearing includes an inner race attached to a shaft, an outer race attached to a housing, a plurality of rolling elements in an annular region and a pair of shields extending inwardly from the outer race toward the inner race so as to substantially enclose the annular region. The shields have a closely-spaced, noncontacting relationship with the inner race thereby defining gaps. The elements of the bearing are of magnetically permeable material, and the sealed bearing includes means for producing a magnetic field in the gaps and in the regions where the rolling elements contact the races. A ferrofluid is retained by the magnetic field in the gaps for sealing and in the regions of contact between the rolling elements and the races for lubrication. A reservoir of ferrofluid in the regions between the two seals replenishes ferrofluid lost at the sealing and lubrication areas. The magnetic field can be produced by permanent magnetization of the bearing assembly or by axially polarized permanent magnets located on either or both ends of the outer race. Such a bearing may be used with a magnetic or nonmagnetic shaft and permits relative motion between the shaft and the housing. The housing material is of nonmagnetic type when external magnets are used.

    摘要翻译： 密封的滚动元件轴承包括附接到轴的内座圈，附接到壳体的外座圈，环形区域中的多个滚动元件和从外座圈向内座圈向内延伸的一对护罩，以便 基本上包围环形区域。 盾牌与内圈具有紧密的非接触关系，从而定义了间隙。 轴承的元件是导磁材料，并且密封的轴承包括用于在间隙中和在滚动元件与座圈接触的区域中产生磁场的装置。 铁磁流体由用于密封的间隙中的磁场和用于润滑的滚动元件和滚道之间的接触区域中的磁场保持。 两个密封件之间的区域中的铁磁流体储存件补充在密封和润滑区域损失的铁磁流体。 磁场可以通过轴承组件的永久磁化或位于外圈的一端或两端的轴向极化永磁体来产生。 这种轴承可以与磁性或非磁性轴一起使用并且允许轴和壳体之间的相对运动。 当使用外部磁体时，外壳材料是非磁性的。

    Compact ferrofluidic electrically conducting sealed bearing
    10.
    发明授权
    Compact ferrofluidic electrically conducting sealed bearing 失效
    紧凑型铁氟龙导电密封轴承

    公开(公告)号：US4797013A

    公开(公告)日：1989-01-10

    申请号：US12193

    申请日：1987-02-09

    申请人： Kuldip Raj ,  Hanumaiah L. Gowda ,  Ronald Moskowitz

    发明人： Kuldip Raj ,  Hanumaiah L. Gowda ,  Ronald Moskowitz

    IPC分类号： F16C33/10 ,  F16C33/82 ,  F16J15/43 ,  G11B19/20

    CPC分类号： G11B19/2009 ,  F16C33/6644 ,  F16C33/6688 ,  F16C33/765 ,  F16C41/002 ,  F16J15/43 ,  F16C2370/12

    摘要： A sealed, rolling element bearing includes an inner race attached to a shaft, an outer race attached to a housing, a plurality of rolling elements in an annular region and a pair of shields extending inwardly from the outer race toward the inner race so as to substantially enclose the annular region. The shields have a closely-spaced, noncontacting relationship with the inner race thereby defining gaps. The elements of the bearing are of magnetically permeable material, and the sealed bearing includes means for producing a magnetic field in the gaps and in the regions where the rolling elements contact the races. A ferrofluid is retained by the magnetic field in the gaps for sealing and in the regions of contact between the rolling elements and the races for lubrication. A reservoir of ferrofluid in the regions between the two seals replenishes ferrofluid lost at the sealing and lubrication areas. The magnetic field can be produced by permanent magnetization of the bearing assembly or by axially polarized permanent magnets located on either or both ends of the outer race. Such a bearing may be used with a magnetic or nonmagnetic shaft and permits relative motion between the shaft and the housing. The housing material is of nonmagnetic type when external magnets are used.

    摘要翻译： 密封的滚动元件轴承包括附接到轴的内座圈，附接到壳体的外座圈，环形区域中的多个滚动元件和从外座圈向内座圈向内延伸的一对护罩，以便 基本上包围环形区域。 盾牌与内圈具有紧密的非接触关系，从而定义了间隙。 轴承的元件是导磁材料，并且密封的轴承包括用于在间隙中和在滚动元件与座圈接触的区域中产生磁场的装置。 铁磁流体由用于密封的间隙中的磁场和用于润滑的滚动元件和滚道之间的接触区域中的磁场保持。 两个密封件之间的区域中的铁磁流体储存件补充在密封和润滑区域损失的铁磁流体。 磁场可以通过轴承组件的永久磁化或位于外圈的一端或两端的轴向极化永磁体来产生。 这种轴承可以与磁性或非磁性轴一起使用并且允许轴和壳体之间的相对运动。 当使用外部磁体时，外壳材料是非磁性的。