陈睿池+谢淑娟+赵越+王海民+黄雄

摘要：为了优化离心泵运行工况，运用叶轮机械设计、前置导叶预旋调节的基本理论，并结合诱导轮设计理论，设计了两种不同叶高的双吸泵前置诱导叶片.对带有不同叶高前置叶片的双吸泵进行了试验研究.研究结果表明：带有诱导叶片的双吸泵虽然扬程略有降低，且在大流量区域效率降低，但其功率消耗降低，最大可节能3.34%，且高效区往小流量偏移；14 mm叶高诱导叶片调节效果明显优于20 mm叶高诱导叶片，且能够有效地将双吸泵高效区往小流量偏移，同时降低离心泵功率消耗.

关键词：双吸离心泵； 前置导叶预旋； 叶高； 功率消耗

中图分类号： TH 311 文献标志码： A

Abstract：In order to improve the performance of the double suction centrifugal pump，front guide vanes with two different heights were designed using the basic design theory of turbomachinery and prespin regulating of guide vanes，as well as inducer design theory.The experimental studies on the impact of guide vanes with different heights on the characteristics of double suction centrifugal pump performance were also conducted.The results showed that the power consumption of the double suction pump with reasonable height of guide vanes could be reduced by 3.34%，and the guide vanes could improve the efficiency of double suction centrifugal pump at the condition of a small flow rate.The adjusting effect with 14 mm guide vanes was markedly better than that with 20 mm guide vanes.At the same time，the high efficiency district of the double suction centrifugal pump moved to the small flow rate zone，and the energy consumption could be reduced by using the 14 mm guide vanes.

Keywords：double suction centrifugal pump； front guide vane preswirl； blade height； energy consumption

离心泵耗能总量巨大，因此对其进行节能研究有着重要的意义.在离心泵实际运行中，存在着运行效率低于设计效率的现象，这主要是因为离心泵的运行工况低于设计工况的要求，而致使其长期在小流量、低效率工况下运行[1].因此，为了提高离心泵实际运行时的水力性能，除了重视泵自身的节能，还应寻求一种高效的工况调节方式[2].其中前置导叶预旋调节是一种具有较大节能潜力的工况调节方式，并且已在工程实际中得到广泛的研究与应用[3-4].在工程应用中，离心泵按叶轮吸入方式可分为单吸泵和双吸泵.目前研究较多的是运用前置导叶预旋调节方式提高单吸泵的水利性能，如文献[5]数值模拟了不同预旋角度下前置导叶离心泵全流道的三维湍流流场，从而验证了离心泵前置导叶预旋调节能够有效地改善离心泵在非设计工况下的水力性能；……