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    Magnetic Fluidic Seal with Improved Pressure Capacity
    7.
    发明申请
    Magnetic Fluidic Seal with Improved Pressure Capacity 审中-公开
    具有改进压力容量的磁流体密封

    公开(公告)号：US20060192345A1

    公开(公告)日：2006-08-31

    申请号：US11381564

    申请日：2006-05-04

    申请人： Zhixin Li

    发明人： Zhixin Li

    IPC分类号： F16J15/43

    CPC分类号： F16J15/43 ,  F16C33/1035

    摘要： A magnetic assembly for a multistage magnetic fluid rotary seal has a shaft, an annular permanent magnet, at least one pole piece and a radial gap formed between the shaft and the pole piece. The shaft and the pole piece have a plurality of ridges in opposing, non-contacting relationship forming the radial gap. The ridges have a flat top portion facing the radial gap and each pair of facing flat top portions has one that is wider than the other.

    摘要翻译： 用于多级磁流体旋转密封件的磁性组件具有轴，环形永磁体，至少一个极片和形成在轴和极片之间的径向间隙。 轴和极片具有形成径向间隙的相对的非接触关系的多个脊。 脊部具有面向径向间隙的平坦顶部部分，并且每对面对的平坦顶部部分具有比另一个宽的部分。

    Apparatus and method for jitter attenuation in rotary encoders
    8.
    发明授权
    Apparatus and method for jitter attenuation in rotary encoders 失效
    旋转编码器抖动衰减的装置和方法

    公开(公告)号：US5594241A

    公开(公告)日：1997-01-14

    申请号：US384941

    申请日：1995-02-07

    申请人： Zhixin Li ,  Steve Ham

    发明人： Zhixin Li ,  Steve Ham

    IPC分类号： G01D5/244 ,  G01D5/245 ,  G01D5/34

    CPC分类号： G01D5/2448 ,  G01D5/2451

    摘要： A signal conditioning unit receives index and data signals from a rotary incremental encoder, and attenuates the pulse-to-pulse jitter of the data signal by passing the data signal through an AND gate having at least two of its inputs tied to the data signal to provide a jitter attenuated data signal. Zero-delay jitter riding on the index signal is attenuated by ANDing together the index signal and the jitter attenuated data signal to provide a jitter attenuated index signal. The jitter attenuated index signal is then processed to extend the active state of the signal to match the duration of the active state of the index signal, and thus provide a synthesized jitter attenuated index signal. To account for the propagation/processing delay associated with extending the active duration of the jitter attenuated index signal, the jitter attenuated data signal is delayed to provide the proper timing relationship between the processed jitter and index signals. The signal conditioning unit of the present invention improves the position and velocity accuracy of the rotary incremental encoder supplied signals since the jitter is attenuated from the index and data signals, which improves the positioning and control accuracy of the control system which acts upon these signals.

    摘要翻译： 信号调节单元接收来自旋转增量式编码器的索引和数据信号，并且通过使数据信号通过与其数据信号中至少有两个输入的AND门通过数据信号来衰减数据信号的脉冲到脉冲抖动， 提供抖动衰减数据信号。 通过将索引信号和抖动衰减数据信号进行AND运算以提供抖动衰减的索引信号，使索引信号上的零延迟抖动衰减。 然后处理抖动衰减索引信号以扩展信号的有效状态以与索引信号的有效状态的持续时间相匹配，从而提供合成的抖动衰减索引信号。 为了解决与扩展抖动衰减索引信号的有效持续时间相关联的传播/处理延迟，抖动衰减的数据信号被延迟以提供经处理的抖动和索引信号之间的适当的定时关系。 本发明的信号调节单元改善了旋转增量编码器提供的信号的位置和速度精度，因为抖动从索引和数据信号衰减，这提高了作用于这些信号的控制系统的定位和控制精度。

    Magnetic fluidic seal with improved pressure capacity
    10.
    发明授权
    Magnetic fluidic seal with improved pressure capacity 有权
    磁流体密封，压力容量提高

    公开(公告)号：US07188840B2

    公开(公告)日：2007-03-13

    申请号：US10614461

    申请日：2003-07-07

    申请人： Zhixin Li

    发明人： Zhixin Li

    IPC分类号： F16J15/43

    CPC分类号： F16J15/43

    摘要： A magnetic assembly for a multistage magnetic fluid rotary seal has a shaft, an annular permanent magnet, at least one pole piece and a radial gap formed between the shaft and the pole piece. The shaft and the pole piece have a plurality of trapezoidal-shaped ridges in opposing, non-contacting relationship forming the radial gap. The trapezoidal-shaped ridges have a flat top portion facing the radial gap and tapered sides that diverge away from the top portion.

    摘要翻译： 用于多级磁流体旋转密封件的磁性组件具有轴，环形永磁体，至少一个极片和形成在轴和极片之间的径向间隙。 轴和极片具有形成径向间隙的相对的非接触关系的多个梯形脊。 梯形形状的脊具有面向径向间隙的平坦顶部和从顶部分开的锥形侧面。