离心式无堵塞泵不等扬程的优化设计与试验

为了使离心式无堵塞泵满足多工况运行的要求,采用不等扬程水力设计方法对模型泵100QW110-16-7.5的叶轮进行优化设计,并结合计算流体力学数值模拟技术分析由原始方案和新方案所得叶轮的内部流场分布,同时,在模拟的基础上对模型样机进行了性能测试.结果表明:采用新方案所得叶轮对流体做功更充分,其流线在不同工况下的分布更均匀、流畅,能够改善泵内流体的流动状况;由新方案所得模型泵在额定流量下的扬程为16.89m,效率为83.11%,已达到节能级离心式清水泵的产品性能要求,在小流量工况下无马鞍区、振动较小,大流量下高效率区的范围较宽,处于0.8q~1.3q且其无堵塞性能优于原始方案;由新方案所得模型泵性能的预测曲线与试验结果基本吻合,最大误差为7.56%.

Unequal Head Hydraulic Optimal Design and Experiment on a Non-clogging Centrifugal Pump

Abstract： In order to make non-clogging centrifugal pump meet the requirement of multiple operating conditions, optimization design of the 100QW110 16 7.5 model pump impeller was done by using the unequal head hydraulic design method. Combining with the CFD numerical simulation technology, the internal flow field of the original scheme and new scheme were analyzed. It shows that the new impeller does work more fully, its flow lines distributed more uniformly and smoothly at different conditions, and the flow condition of the pump is improved. Besides, the optimal model prototype, based on the simulation, was tested. And the results show that the head of the model pump is 16.89 m and the efficiency reaches 83.11% at the rated point, which has exceeded energy saving level product requirement of the centrifugal water pump. At low flow conditions, no saddle area and no intense vibration phenomenon occure, meeting the design requirements. The efficiency curve, between 0.8q and 1.3q of its efficient region, has a wide efficient area. And the non clogging performance is better than the original scheme. The predicted curve is basically consistent with the experimental one, and the maximum error is 7.56%, indicating that the numerical simulation is accurate.