摘要
在分析冲击凿岩时岩石破碎过程的基础上,应用波动力学钻探理论对由活塞、钎具、岩石组成的凿岩钻机冲击钻探系统进行瞬态动力学分析,基于一元、二元冲击子系统力学模型建立凿岩系统特征方程,引入无量纲钻头质量比、无量纲活塞长度比等抽象变量,推导出系统的能量传递效率表达式,详细分析应力波在钻杆中的传递效率,得到在不同设计参数时的最大凿岩效率.
On the basis of analyzing the rock crushing process of impact rock drilling,the transient dynamic analysis was conducted with drilling theory of wave dynamics for the impact drilling system of a drill composed of piston-drill rod-rock.Based on one-dimensional and two-dimensional dynamic model of impact subsystem,the characteristic equation of rock drilling system was set up.Abstracted variables such as non-dimensional mass-ratio of drill bit and non-dimensional length-ratio of piston were introduced to derive the expression for energy transfer efficiency of the system. A detailed analysis of transmission efficiency of stress wave in the drill rod was carried out, so that the maximal drilling efficiency was obtained for the cases of different design parameters.
出处
《兰州理工大学学报》
CAS
北大核心
2009年第4期39-42,共4页
Journal of Lanzhou University of Technology
关键词
凿岩钎杆
瞬态动力学
应力波
rock drilling rod
transient dynamics
stress wave