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首页> 外文期刊>Shock and vibration >Impact System Dynamic Characteristics of Hydraulic Rock Drill Based on an Overlapped Reversing Valve
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Impact System Dynamic Characteristics of Hydraulic Rock Drill Based on an Overlapped Reversing Valve

机译：基于重叠换向阀的液压凿岩机冲击系统动力学特性

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摘要

For the phenomenon of a hydraulic rock drill based on an underlapped reversing valve, the mechanical structure of the overlapped reversing form was proposed, which affected the pressure pulsation of the impact system, and motion of the impact piston was analyzed. The model of a hydraulic rock drill was built based on Newton's laws. The initial lead size of the reversing point was calculated by the equilibrium position of the damping piston and final velocity of the impact piston. The size of the overlapped reversing valve was designed and the best impact interval was calculated, according to pressure characteristic curves in the piston of the front-rear chamber and in the reversing valve of the left-right chamber, and the damping piston floating feature had an impact on initial lead size of the reversing point. The advantages of the overlapped reversing valve were analyzed, by contrasting the pressure pulsation of the impact system and motion of the impact piston with the underlapped reversing valve. The inner mechanism experiment of the hydraulic rock drill was designed to test the pressure characteristic curves in the piston of the front-rear chamber and in the reversing valve of the left-right chamber. The model of the overlapped reversing valve was verified by the experiment.
机译：针对基于换向阀的液压凿岩机的现象，提出了换向重叠形式的机械结构，影响了冲击系统的压力脉动，并对冲击活塞的运动进行了分析。基于牛顿定律建立了液压凿岩机模型。通过减震活塞的平衡位置和冲击活塞的最终速度来计算换向点的初始导程。根据前后腔室活塞和左右腔室换向阀中的压力特性曲线，设计了重叠换向阀的尺寸并计算出最佳的冲击间隔，并且阻尼活塞浮动特征具有对反转点的初始引线尺寸的影响。通过对比冲击系统的压力脉动和冲击活塞与欠重叠换向阀的运动，分析了重叠换向阀的优点。设计了液压凿岩机的内部机理实验，以测试前后腔室活塞和左右腔室换向阀中的压力特性曲线。通过实验验证了重叠换向阀的模型。

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  • 来源
    《Shock and vibration》 |2018年第9期|8963750.1-8963750.11|共11页
  • 作者

    Li Yelin; Luo Youxin; Wu Xiao;

  • 作者单位

    Hunan Univ Arts & Sci, Hunan Prov Cooperat Innovat Ctr Construct & Dev D, Changde 415000, Peoples R China;

    Hunan Univ Arts & Sci, Hunan Prov Cooperat Innovat Ctr Construct & Dev D, Changde 415000, Peoples R China;

    Hunan Univ Arts & Sci, Hunan Prov Cooperat Innovat Ctr Construct & Dev D, Changde 415000, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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