多石底质下耙吸船小流道泥泵的性能调整

针对耙吸船在俄罗斯布朗克工程中疏浚多石底质工况时,频繁出现块石堵泵、堵耙口等严重影响施工生产的难题,对耙吸船泥泵通道的通过能力及耙头格栅进行研究。采用泥泵相似性原理,从泥泵叶轮球面通道尺寸、叶轮切割对泥泵性能影响、叶片切割长度计算、叶轮切割操作等方面进行分析,调整泥泵叶轮通径以适应多石底质复杂工况。通过实施该方法,有效解决了多石底质下耙吸船小流道叶轮施工效率低的难题,单船过泵量平均提高44%,装舱生产率平均提高17%,周期生产率提高11. 5%。

Performance adjustment of small flow dredge pump for trailing suction hopper dredger under multi-rock sediment

In order to solve the problems of blockage pump and harrow,which seriously affect the construction and production in Blank Project in Russia,we study the passage capacity of the dredge pump and the grating of the rake head.Based on the similarity principle of mud pump,we analyze the aspects such as the size increase of spherical channel of mud pump,the influence of impeller cutting on the performance of mud pump,blade cutting length calculation,impeller cutting operation,and adjust impeller diameter of mud pump to suit complex working conditions of multi-rock sediment.Through the methods,the low construction efficiency of the small flow impeller under the multi-rock sediment is solved,the volume of passing pump of single ship increases 44% averagely,the loading productivity increases 17% averagely,and the cycle productivity increases 11.5%.