摘要
为研究离心泵分流叶片参数对其性能的影响,应该侧重于参数排序的规律性及其可靠性方面.采用灰色理论分析了4种不同情况下分流叶片周向偏置角β、偏转角α、进口直径D'和叶片数Z对扬程和效率的综合影响及其规律.通过大量计算,得到了这4个几何参数对扬程和效率影响排序结果.研究结果表明:在4种情况下,4个几何参数中分流叶片周向偏置角β对扬程影响最大,偏转角α影响最小,进口直径D'和叶片数Z对扬程的影响,依次处于它们之间;进口直径D'对效率影响最大,偏转角α影响最小,参数β和Z的影响,介于两者之间.分流叶片参数排序重复性好,可靠性高.研究结果为进一步研究低比转数离心泵水力性能和优化设计提供了重要的依据.
In the research of influence of geometrical parameters of splitter blades on centrifugal pump performance, the regularity of ranking of the parameters and its reliability should be emphasized. Consequently, the comprehensive influence and its regularity of splitter pitch relative to the full length blade β, deflecting angle α, dimensionless inlet diameter and number of blades Z on the pump head and efficiency is analyzed in detail by using the grey theory. The results of the ranking by which the four geometrical parameters intluence the head and efficiency are obtained by means of a lot of calculations. The result showed that the effect of the splitter pitch relative to the full length blade β on the pump head was the largest, the deflecting angle α is the smallest, the dimensionless inlet diameter and number of blades Z were in between for all the cases. Meanwhile, the effect of D＇on the efficiency was the largest, parameter α was the smallest,β and Z were between them. The repeatability of the ranking of splitter blades parameters is good, and the reliability is high. The results may establish an important base for further study on the hydraulic performance and the optimization design of a centrifugal pump with low specific speed.
出处
《排灌机械工程学报》
EI
北大核心
2012年第3期295-299,共5页
Journal of Drainage and Irrigation Machinery Engineering
关键词
离心泵
分流叶片
灰色理论
性能
排序
centrifugal pump
splitter blades
grey theory
performance
ranking
