Study on improving performance of airlift device by sell'excited oscillation pulsed jet used in mining under water  

作　　者：杨林 蔡书鹏 唐川林 

机构地区：[1]School of Mechanical and Electrical Engineering,Chongqing Jiaotong University,Chongqing 400074,China [2]School of Mechanical Engineering,Hunan University of Technology,Zhuzhou 412008,China

出　　处：《Journal of Coal Science & Engineering(China)》2008年第4期683-685,共3页煤炭学报（英文版）

基　　金：the National Natural Science Foundation(50504021);the Key Science and Technology Project of National Education Ministry(206122);the Science and Technology Project of Chongqing Education Committee(KJ070419)

摘　　要：The feasibility of the nozzle of self-excited oscillation pulsed jet (SEOPJ) as the breaker and loosing device for the air-lift pump was researched.The dynamic characteris- tics of the SEOPJ to crush the hard clay and loose the layer of ore deposit were explored experimentally under the submerged condition.The results show that the SEOPJ not only effectively breaks the hard clay or loose the particles of sand on the placer bed,but also produces fluctuating uplift force acting on particles of sand.The oscillating cross flow caused by the SEOPJ makes particles of sand move to the end of the suction pipe easily. Energy efficency of the airlift and concentration of the solids for the solid-liquid mixture sucked by the air-lift pump are increased obviously with the breaker of SEOPJ.The feasibility of the nozzle of self-excited oscillation pulsed jet （SEOPJ） as the breaker and loosing device for the air-lift pump was researched. The dynamic characteristics of the SEOPJ to crush the hard clay and loose the layer of ore deposit were explored experimentally under the submerged condition. The results show that the SEOPJ not only effectively breaks the hard clay or loose the particles of sand on the placer bed, but also produces fluctuating uplift force acting on particles of sand. The oscillating cross flow caused by the SEOPJ makes particles of sand move to the end of the suction pipe easily. Energy efficency of the airlift and concentration of the solids for the solid-liquid mixture sucked by the air-lift pump are increased obviously with the breaker of SEOPJ.

关 键 词：mining under water air-lift pulsed waterjet perfomance opration 

分 类 号：TD82[矿业工程—煤矿开采]