In order to improve the performance of marine centrifugal pump, a centrifugal pump whose specific speed is 66.7 was selected for the research. Outlet diameter D₂, outlet width b₂, blade outlet angle β₂, blade wrap φ and blade number z of the impeller were chosen as the variables. The maximum weighted average efficiency and the minimum vibration intensity at the base were calculated as objectives. Based on the Latin Hypercube method, the impeller was numerically optimized. The numerical results show that after optimization, the amplitudes of pressure fluctuation on the main frequency at different monitoring points decrease in varying degrees. The radial force on impeller decreases obviously under off-design flow rates and is more symmetrical during the operation of the pump. The variation of the axial force is relatively small, which has no obvious relationship with the rotating angle of the impeller. The energy performance and vibration experiment was performed for verifying. The test results show that the weighted average efficiency under 0.8Q_d, 1.0Q_d and 1.2Q_d increases by 4.3% after optimization. The maximal vibration intensity at M1-M4 on the pump base reduced from 0.36 mm/s to 0.25 mm/s, decreasing by 30.5%. In addition, the vibration velocities of bracket in pump side and outlet flange also have significant reductions.

为了提高船用离心泵的性能，本研究选择了比转速为66.7的离心泵。出口直径d ₂，出口宽度b ₂，叶片出口角β ₂，刀片涡卷φ和叶片数目ž选择叶轮的根数作为变量。计算目标的最大加权平均效率和最小振动强度作为目标。基于拉丁文Hypercube方法，对叶轮进行了数值优化。数值结果表明，优化后，不同监测点主频压力波动幅度均有不同程度的减小。在非设计流量下，作用在叶轮上的径向力明显减小，并且在泵的运行过程中更加对称。轴向力的变化相对较小，与叶轮的旋转角度没有明显的关系。进行了能量性能和振动实验以进行验证。测试结果表明，在0.8 Q下的加权平均效率_{优化后的d}，1.0 Q _d和1.2 Q _d增加了4.3％。泵基座上M1-M4处的最大振动强度从0.36 mm / s降低到0.25 mm / s，降低了30.5％。另外，泵侧和出口法兰上支架的振动速度也大大降低。