带分流叶片离心泵无过载特性的理论与试验研究

通过整合分流叶片设计方法和无过载理论,基于无限叶片数理论和泵的欧拉方程,分析了带分流叶片离心泵无过载特性实现的理论条件,并推导了最大轴功率及其位置的预估公式.按高效无过载离心泵的设计要求,选择叶片出口安放角β2,叶片出口宽度b2,喉部面积Ft以及分流叶片进口直径Di,设计了三水平的L9（34）标准正交试验方案.试验得到了各参数对带分流叶片离心泵各性能指标影响的主次顺序为b2,β2,Ft,Di,并得出模型泵的最优设计方案,同时验证了所推导的带分流叶片离心泵轴功率极值点预估公式的有效性.对最优设计方案的测试结果表明,在实现无过载的同时,保持了较高效率,达到了试验目的.说明分流叶片设计和无过载设计理论的整合,可以实现离心泵的高效无过载特性.

Theory and experiment on non-overload characteristics for centrifugal pump with splitters

By combining the former research results about the splitters and the non-overload theory in centrifugal pumps,and based on the principle theory of pumps,the theoretical conditions to achieve the property of non-overload in centrifugal pump with splitters was analyzed,and formulas to estimate the maximum shaft power and its position were derived.Based on the requirements of both high efficiency and non-overload,blade outlet angle β2,blade outlet width b2,volute throat area Ft and the inlet diameter of splitters Di were chosen with three levels to design a normal L9（34）orthogonal test scheme.By analyzing the test results,the important order of the four geometric parameters on the performance of centrifugal pumps with splitters was obtained as b2,β2,Ft,Di,and the estimating formulas were validated.Meanwhile,the optimized design scheme was determined,and corresponding test was done also.It demonstrates that the experiment purpose was reached,the design method to combine the splitters and non-overload theory is reasonable,which can get the property of both high efficiency and non-overload.