作　　者： (罗荣昌）; (余淑琦）; (夏建新）; (曹斌）;

机构地区： 中央民族大学生命与环境科学学院,北京100081

出　　处： 《海洋工程》 2017年第4期117-125,共9页

摘　　要： 扬矿泵作为深海采矿水力提升系统中的关键设备,其设计参数对安全、高效输送矿石有着重要作用。通过对扬矿泵导叶区域中的颗粒进行受力分析,建立受力方程和运动方程,从扬矿泵结构参数和输送参数两个方面来研究颗粒在扬矿泵导叶中的运动情况。研究结果表明:1)当颗粒粒径一定的条件下,相比于25°和30°的导叶进口安放角θ,15°~20°时颗粒将在更短的时间内以更快的速度与导叶壁面发生碰撞,这样对导叶的磨损更严重,但当θ大于25°时,导叶曲面弯曲过急,不利于颗粒过泵,因此,在此研究中选择导叶进口安放角为25°较合适;2)流道宽度小于3d_(max),颗粒与导叶碰撞位置越靠近导叶进口,碰撞时颗粒的速度越大,对泵的磨损越严重,流道宽度大于3d_(max),导叶的导流效果降低,综合考虑,选择流道宽度为3 d_(max)较佳;3)当水流速度在2~5 m/s时,颗粒与导叶碰撞瞬间,水流速度大的工况下,颗粒会以更大的速度与导叶碰撞,这样对机械的磨损更严重;4)细颗粒不容易与导叶碰撞,同一流速下,粒径越大的颗粒在导叶中的停留时间越长,会增加堵泵的概率。 As the key equipment in deep-sea mining system,the lifting pump＇s design parameters play an important role in safe and efficient ore-conveying. In this research,the force equations and kinematic equations were established based on the analysis of the stress of solid particles. Furthermore,the motion characteristics of coarse particles in guide vanes were studied with different structure parameters and transmit parameters. The results are as follows：（ a） Under the condition of a certain particle size,when the inlet-guide-vane angle（ θ） is in the range of 15° ~ 20°,the collision between particles and the guide vanes occurrs at a faster speed in a shorter time,as compared with 25° and 30° of the inlet-guide-vane angle. This would lead to more serious wear for the guide vane.However,when θ is over 25°,the resistance of the particle pump is increased due to overbend guide-vane surface. Therefore,the optimal θ is 25° in this experiment.（ b） When the runner width is less than 3dmax,the collision position is closer to the guide vane inlet and the collision speed also becomes faster. When the runner width is over 3dmax,the guide-flow capability of the guide vane is reduced.So,the optimal runner width is 3dmax.（ c） With the flow velocity increase,collision speed becomes faster and the wear for the guide vane is more serious.（ d） At the same flow velocity,the residence time for particles would be prolonged along with the increase of particle size. What is more,the blocking probability of pump will increase.

关 键 词： 粗颗粒 结构参数 输送参数 扬矿泵 导叶结构 流道宽度 安放角