基于ABAQUS的气动潜孔锤球齿碎岩及布齿优化

Pneumatic DTH hammer tooth crushing and optimization of teeth arrangement based on ABAQUS

摘要:

为提高坚硬地层大直径潜孔锤的破岩效率与使用寿命，运用ABAQUS软件建立了球齿碎岩仿真模型，对比分析?18 mm球齿在不同钻进参数下冲击切削碎岩过程中的破碎比功、侵入深度、破碎范围与应力影响范围等曲线，优选钻进参数和布齿。分析结果表明：当钻压为1.2 kN、冲击功为30 J时，对岩石的破碎效率较高，球齿入岩的位移可达0.67 mm，并对岩石进行应力界限划分，得出应力影响范围为43.4 mm；通过双齿冲击切削模拟确定了较为优秀的圈距与间距：圈距取47.4 mm，间距取43.4~51.4 mm；考虑到球齿的磨损，利用圈距与间距对?711 mm大直径潜孔锤进行了优化布齿。

Abstract:

In order to improve the rock breaking efficiency and service life of the large diameter drill hammer in hard formation， ABAQUS software was used to establish the simulation model of rock breaking with spherical teeth. The curves of crushing specific work， invasion depth， crushing range and stress influence range of φ18mm spherical teeth in the process of impact cutting rock breaking under different drilling parameters were compared and analyzed， and the drilling parameters and tooth layout were optimized. The analysis results show that when the weight on bit is 1.2kN and the impact energy is 30J， the crushing efficiency of the rock is higher， the displacement of the spherical teeth into the rock can reach 0.67mm， and the stress limit of the rock is divided， and the influence range of the stress is 43.4mm. Through the simulation of double-tooth impact cutting， the better ring distance and spacing were determined： the ring distance was 47.4mm， and the spacing was 43.4~51.4mm. Considering the wear of the spherical teeth， using the ring distance and spacing， the teeth of the 711mm large-diameter drill hammer were optimized.