适用于超高密实泥质砂底质的小功率绞刀设计

Design of Low Power Cutter Suitable for Ultra-Dense Mud-Gravel Substrate

绞吸式挖泥船作为疏浚吹填行业的重要海工装备,在港口航道、围埝造地、岛礁建设等领域发挥着极其重要的作用。据统计,目前世界上70%以上的疏浚工程是由绞吸式挖泥船通过水力输送方式完成的。为了拓展小功率绞刀挖泥船挖掘硬底质土的性能,通过绞刀臂型设计、刀齿选型、参数优化、空间安装位置的确定及有限元模拟强度分析等,研究开发了绞刀轴功率为1 470 kW,转速为30 r/min的6臂型式的挖硬底质土专用绞刀,可为特殊地质条件下小功率绞刀绞吸挖泥船施工提供借鉴。

As an important marine equipment of dredging industry, the cutter suction dredger plays an extremely important role in the fields of port and channel, epeirogenic, reef construction and so on. According to statistics, more than 70% of the dredging projects in the world are completed by the cutter suction dredger. In order to expand the performance of low power cutter dredger for excavating hard bottom soil sand, a 6-arm type special cutter with cutter shaft power of 1 470 kW and rotation speed of 30 r/min was developed through the design of cutter arm type, selection of tooth design, parameter optimization, determination of spatial installation position and analysis of finite element simulation strength. It can provide reference for the construction of low power cutter suction dredger under special geological conditions.