绞吸式清淤机器人不同绞吸参数下绞刀流场特性研究  

Flow field characteristics of cutter under different cutter suction parameters forcutter suction dredging robot

作　　者：王李俊 顾磊[1,2] 刘增辉 魏长赟 WANG Lijun;GU Lei;LIU Zenghui;WEI Changyun(Engineering Research Center of Dredging Technology,Hohai University,Changzhou 213022,China;College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213022,China)

机构地区：[1]河海大学,疏浚技术教育部工程研究中心,江苏常州213022 [2]河海大学机电工程学院,江苏常州213022

出　　处：《水运工程》2023年第12期171-177,共7页Port & Waterway Engineering

摘　　要：基于绞吸式清淤机器人绞吸工况,运用Fluent软件建立绞吸模型,数值模拟不同绞吸参数下绞刀正刀与反刀切削过程。对比分析绞刀鸭嘴管入口处与关键截面处的泥沙浓度分布特征,开展正刀与反刀切削下绞刀流场特性研究,为水下清淤机器人绞刀切削转速的合理选择提供理论依据。结果表明:在清淤机器人绞吸过程中,正刀切削时泥沙回填现象较为明显,反刀切削时泥沙挤压现象较为显著;绞刀切削时不宜转速过高,高转速段切削会造成泵吸泥沙浓度不稳定的现象;对于低水平泵吸流速,绞刀转速控制在15~25 r/min,高水平泵吸流速,绞刀控制在25~35 r/min,有助于提高产量。此外,建议鸭嘴管不要对称布置,而是沿着绞刀自转方向偏转一定角度安装,以提高泥沙吸送效率。Based on the working conditions of a cutter suction dredging robot,this paper uses Fluent software to create a cutter suction model,so as to numerically simulate the over and under cutting processes of the cutter under different cutter suction parameters.The paper analyzes the sediment concentration distribution at the entrance of the duckbill tube and the key section of the cutter and studies the flow field characteristics of the cutter during the over and under cutting processes,providing a theoretical basis for the reasonable selection of cutting speed of the cutter for the underwater dredging robot.The findings suggest that during the cutter suction process of the dredging robot,the phenomenon of sediment backfilling is more pronounced during over cutting,while the phenomenon of sediment squeezing is more pronounced during under cutting.It is not advisable to operate the cutter at a high speed during the cutting process,as high-speed cutting can cause unstable sediment concentration during pumping.For low-level pumping flow rates,the cutter speed should be controlled at 15-25 r min,while for high-level pumping flow rates,the cutter should be controlled at 25-35 r min to improve productivity.Furthermore,the paper recommends not to arrange the duckbill tube symmetrically but to install it at a certain angle along the rotation direction of the cutter,so as to improve the efficiency of sediment suction.

关 键 词：绞吸式清淤机器人 流固耦合 数值模拟 流场特性 

分 类 号：U655.3[交通运输工程—港口、海岸及近海工程]