气体流动阻力损失对反向扩孔气动冲击器性能的影响

发布时间：2018-01-12 11:04

  本文关键词：气体流动阻力损失对反向扩孔气动冲击器性能的影响　出处：《西南交通大学学报》2016年06期 　论文类型：期刊论文

  更多相关文章： 反向扩孔气动冲击器 气体流动 压力损失 计算机仿真

【摘要】：为了研究反向扩孔气动冲击器内部气体流动阻力损失对其性能的影响,在简化复杂的气路基础上,从其结构和工作原理出发,分析了冲击器工作过程中气体流动所产生的压力损失;在有压力损失的条件下,研究冲击器气腔内气体变化特性,建立了冲击器的工作过程数学模型;根据数学模型,应用MATLAB程序进行计算机仿真运算,得到了冲击器工作过程中压力损失曲线,以及压力损失条件下活塞运动特性和各腔压力变化规律.研究结果表明:气体流动阻力损失影响冲击器破岩效率,使得冲击器活塞运动末速度从5.05 m/s下降到4.22 m/s,冲击频率从5.00 Hz下降到4.28 Hz;冲击器尾气压力仅为0.140 MPa,低于设计值0.185 MPa,影响冲击器尾气排屑.
[Abstract]:In order to study the effect of the gas flow resistance loss on the performance of the reverse reaming pneumatic impactor, the structure and working principle of the gas flow impactor are analyzed on the basis of simplifying the complicated gas path. The pressure loss caused by the gas flow during the operation of the impactor is analyzed. Under the condition of pressure loss, the change characteristics of gas in the impactor chamber are studied, and the mathematical model of the working process of the impactor is established. According to the mathematical model, the MATLAB program is used to carry out the computer simulation operation, and the pressure loss curve in the working process of the impactor is obtained. The results show that the loss of gas flow resistance affects the rock breaking efficiency of the impactor. The end velocity of piston is decreased from 5.05 m / s to 4.22 m / s, and the impact frequency is reduced from 5.00 Hz to 4.28 Hz. The exhaust pressure of the impactor is only 0.140 MPa, which is lower than the design value of 0.185 MPA, which affects the exhaust emission of the impactor.
【作者单位】： 中南大学机电工程学院;
【基金】：国家自然科学基金资助项目(51375499)
【分类号】：TU63
【正文快照】： 非开挖技术是一种利用岩土钻掘设备进行地下管道铺设和修复的施工技术[1-2],该技术能够在不进行地表开挖的情况下实现管道铺设,减少了施工时对交通、环境和建筑的破坏[3].扩孔器是非开挖施工中岩土钻掘的重要设备.传统的扩孔设备在泥层和沙泥层工作很好,但当遇到岩石、卵砾石，

本文编号：1413967