挤压清淤抓斗泥浆输送能耗计算  

Calculation of energy consumption in slurry transportation of squeezing dredging grab

作　　者：欧阳义平[1] 杨启[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《泥沙研究》2013年第1期27-33,共7页Journal of Sediment Research

摘　　要：挤压清淤抓斗是一种为了提高疏浚效率和能量利用率、减少环境污染而研发的新型抓斗。该类抓斗结构的特殊性决定了它输送泥浆时的能耗不同于一般的疏浚设备。本文基于现有的有关浆体输送的理论和试验成果,进行分析,推导出适用于挤压清淤抓斗泥浆输送的能耗计算公式,然后利用得到的计算公式对浆体输送过程中的能耗进行计算。通过调整相关的参数,如浆体体积流量、挖掘浓度和输泥管直径等,分析了不同参数对输送能耗的影响,并确定了在各不同参数下比能耗增加不剧烈的最小管径,定义为临界管径。进而为挤压清淤抓斗设计中输泥管直径和流量的确定提供科学有效的指导。The squeezing dredging grab is a novel grab which can enhance the dredging efficiency and energy efficiency, and has less negative effect on the environment during the dredging process. The special character- istics of this new type grab result in the difference of energy consumption from other dredging equipments. In this paper the formulas which are suitable for estimating the energy consumption in the slurry transportation of the grab are derived based on the theoretical and experimental results from the literatures. And they are used to calculate the energy consumption during the slurry transport. By using different relevant parameters, as the volume flowrate, dredging concentration, pipe diameter, etc. , in the calculation, the effects of each parame- ter on the energy consumption can be revealed. The minimum pipe diameter in each set of the parameters de- fined as the critical pipe diameter can be obtained. If the diameter is less than the critical pipe diameter, the energy consumption will increase abruptly. Those results can provide helpful and trustful guidance for the de- termination of the pipe diameter and flowrate in the design and operation of the grab.

关 键 词：挤压抓斗 泥浆输送 管道阻力 临界管径 比能耗 

分 类 号：U615.351.4[交通运输工程—船舶及航道工程]