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信号转换装置卡滞故障分析与改进
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Analysis and Improvement of Signal Conversion Device Stuck Fault
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    摘要:

    针对某信号转换装置在试验过程中出现卡滞故障的情况,建立故障树。对于每个故障分支进行机制分析和故障排查,确定故障原因是锁制机构中摇臂与信号转换装置顶杆之间存在夹角,对顶杆产生侧向力,信号转换装置设计时未考虑侧向力的影响;经历多次解锁动作后,信号转换装置顶杆磨伤壳体内孔表面,摩擦因数异常,造成推动信号转换装置顶杆的运动阻力增加,最终导致出现信号转换装置顶杆卡滞故障。通过对信号转换装置结构采取增加支撑长度、减小壳体和顶杆的配合间隙、增大壳体和顶杆轴端搭接量等措施可解决该问题。经试验验证,措施有效。

    Abstract:

    Fault tree was established for the stuck fault of the signal conversion device during the test. The mechanism analysis and troubleshooting for each fault branch were carried out, and the reason of the fault was determined to be the angle between the rocker arm and the ejector rod of the signal conversion device in the locking mechanism. The lateral force was generated on the ejector rod, and the effect of lateral force has not been considered in the design of the signal conversion device. After several unlocking actions, the surface of the inner hole of the shell was abraded in the ejector rod of the signal conversion device, and the friction coefficient was abnormal, which resulted in the increase of the movement resistance of driving the ejector rod of the signal conversion device, and finally it led to the stuck fault of the signal conversion device. The problem can be solved by increasing the support length, reducing the fit clearance between the shell and the ejector rod, increasing the overlap of the shell and the ejector rod shaft end.The test proves that the measures are effective.

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引用本文

张雷,薛小伟,侯志礼.信号转换装置卡滞故障分析与改进[J].机床与液压,2023,51(8):165-170.
ZHANG Lei, XUE Xiaowei, HOU Zhili. Analysis and Improvement of Signal Conversion Device Stuck Fault[J]. Machine Tool & Hydraulics,2023,51(8):165-170

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  • 在线发布日期: 2023-05-12
  • 出版日期: 2023-04-28