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6 条记录 (耗时 0.042 秒)

    Cable drum safety brake
    6.
    发明授权
    Cable drum safety brake 失效
    电缆鼓安全制动器

    公开(公告)号：US4177973A

    公开(公告)日：1979-12-11

    申请号：US883539

    申请日：1978-03-06

    申请人： Gregory C. Miller ,  Henry R. Albrecht ,  C. William Clarke ,  Paul L. Longthorpe

    发明人： Gregory C. Miller ,  Henry R. Albrecht ,  C. William Clarke ,  Paul L. Longthorpe

    IPC分类号： B66D5/14 ,  B66D5/30 ,  B66D1/48

    CPC分类号： B66D1/54 ,  B66D5/14 ,  B66D5/30

    摘要： A system is provided for automatically clamping a cable drum in the event of mechanical failure of the drive train that connects the cable drum to its prime mover. The system monitors the mechanical continuity of the drive train by comparing the number of revolutions of the prime mover with the number of revolutions made by the cable drum in the same time interval. The system actuates a caliper disc brake mounted with the drum if a discontinuity of the drive train is detected. In the electrica system, shaft encoders are used on both the cable drum axle and prime mover shaft. The cable drum encoder is selected such that the number of pulses it produces per revolution of the cable drum is approximately equal to the number of pulses produced by prime mover shaft encoder per revolution of its shaft divided by the speed reduction ratio of the drive train. The counters in the comparator are periodically reset to prevent the slight difference in the number of pulses produced by the encoders during normal operations from falsely indicating a drive train discontinuity. In the mechanical system, the prime mover shaft and cable drum axle may be connected to a mechanical phase sensing switch through respective rotation transmitting cables in order to determine if the cable drum and prime mover are rotating at the drive train speed reduction ratio.

    摘要翻译： 提供一种系统，用于在将电缆鼓连接到其原动机的传动系的机械故障的情况下自动夹紧电缆卷筒。 该系统通过将原动机的转数与电缆卷筒在同一时间间隔内的转数进行比较来监控传动系的机械连续性。 如果检测到传动系的不连续，系统将启动安装有滚筒的卡钳式盘式制动器。 在电动系统中，轴编码器用于电缆鼓轴和原动机轴上。 选择电缆滚筒编码器，使得其在电缆卷筒的每转产生的脉冲数量近似等于其原动机轴编码器每转其轴的脉冲数除以传动系的减速比。 比较器中的计数器周期性地复位，以防止在正常操作期间由编码器产生的脉冲数量的微小差异，从而错误地指示传动系不连续。 在机械系统中，原动机轴和电缆鼓轴可以通过相应的旋转传递电缆连接到机械相位感测开关，以便确定电缆卷筒和原动机是否以传动系减速比旋转。