用于粒子分离器的砂粒反弹特性实验研究

针对砂粒反弹特性所面临的基础问题及其复杂特点,采用实验与理论分析的方法研究砂粒反弹机理。以砂粒与板面碰撞反弹为起点,自行设计了测量砂粒反弹系数的实验系统,并用高速摄影仪捕捉砂粒的运动轨迹,通过图像处理获得不同粒径的砂粒与不同材料的板面碰撞前后的速度矢量。以实验测量数据为基础,理论分析砂粒运动特性,总结砂粒反弹系数与入射角度之间的关系,建立不同材料的砂粒反弹系数的拟合公式,为进一步提高粒子分离器的分离效率提供研究基础与理论支撑。

Experimental Study on Characteristic of Particle Rebound Used for Particle Separator

In order to cope with basic problems and complex characteristics of particle rebound characteristic, the study on the mechanism of particle rebound is carried out by using the method of experimental and theoretical analyses. Taking the collisions between the particle and the wall as a starting point, we design our own experimental system for measuring the particle rebound coefficient. The trajectories of particles are taken by high-speed camera. Through image processing, the velocity vectors before and after collisions between particles with different diameters and plates with different materials are obtained. Based on the experimental data, the particle motion characteristic is theoretically analyzed, the relationship between the incident angle and the particle rebound coefficient is summed up and the fitting formula of rebound coefficients of particles under different materials is established, which provides the basis and theoretical support for further improving the separation efficiency of the particle separator.