进口直径800 mm泥泵小叶轮开发与应用

绞吸挖泥船的输送距离较短时会引起驱动机（柴油机或电机）超负荷，影响系统运行稳定性，虽然可以通过降低转速、加装缩口缓解，但是降低了系统运行的经济性。采用理论分析设计了一款小叶轮初始形状，通过数值模拟计算其性能并且反复迭代优化完成了小叶轮的最终设计，对比了优化设计后的小叶轮和直接采用切割外径小叶轮的差别。实船测试小叶轮的清水运行特性，验证了水力设计的结果可靠，最后对比绞吸船采用原叶轮和小叶轮施工短排距疏浚工程的施工参数。经现场测试和挖泥应用，发现小叶轮在短排距工况时施工效率明显高于原叶轮，开发的小叶轮达到了设计目的。

Development and application of dredging pump with inlet pipe diameter 800 mm impeller

When the cutter suction dredger has a short delivery distance,it will cause the driver (diesel engine or motor)to overload and affect the stability of the system.Although it can be alleviated by reducing the speed and installing necking,it will reduce the economics of system operation.This paper uses theoretical analysis to design the initial shape of a small impeller,calculates its performance through numerical simulation,and iteratively optimizes the final design of the small impeller.The difference between the optimized impeller and the small impeller directly using the cutting diameter is compared.The actual performance of the small impeller in clean water is tested on the actual ship,and the results of the hydraulic design are verified to be reliable.Finally,the construction parameters of the short-row dredging project using the original impeller and the small impeller for the cutter suction ship are compared.After field tests and dredging applications,it is found that the construction efficiency of the small impeller is significantly higher than that of the original impeller under short-row conditions,and the developed small impeller has achieved the design purpose.