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液压凿岩机是以高压油作为动力,推动活塞撞击钎杆进行工作的冲击机械.冲击系统是液压凿岩机的关键部件,其性能好坏直接影响着液压凿岩机的工作性能.本文以某套阀型液压凿岩机冲击系统为研究对象,基于波动力学理论、测试技术以及数值模拟技术,进行冲击系统动力学特性分析与实验研究,获取钎杆在不同冲击速度下的应力波曲线,对比应力波实验测试曲线和数值模拟曲线,分析表明两者结果较吻合.通过数值仿真模拟可以加快液压凿岩机冲击系统开发进程,为其结构优化设计、改进和能效评估提供依据.
Hydraulic rock drill is a kind of impact machine which uses high-pressure oil as the driving force to push the piston to impact the drill rod to work.The impact system is the key component of the hydraulic rock drill, its performance directly affects the working performance of the hydraulic rock drill.According to a set of valve type hydraulic rock drill Impact system as the research object, based on the wave dynamics theory, the testing technology and the numerical simulation technology, the dynamic characteristics of the impact system were analyzed and experimentally studied. The stress wave curve of the drill rod under different impact velocities was obtained. The experimental curves and numerical values Simulation results show that the two results are in good agreement with each other.Numerical simulation can accelerate the development process of hydraulic rock drill impact system and provide the basis for its structural optimization design, improvement and energy efficiency evaluation.