立式双级自吸泵水力性能分析及内部结构改进

发布时间：2018-05-16 13:22

本文选题：自吸泵 + 立式双级泵　；参考：《流体机械》2017年09期

【摘要】：为改善立式双级无密封自吸泵效率低和噪声大的问题,在分析传统立式自吸泵结构和内部流动的基础上,提出一种改进型立式双级自吸泵,给出了新型自吸泵蜗壳结构和密封口环形式,在保证自吸性能的前提下,有效提升了效率。利用CFD分析软件对传统立式双级自吸泵结构和改进结构进行内部流动的数值模拟,对性能进行了对比分析,并研究了蜗室与气液分离室的匹配和不同密封口环形状和尺寸对泵效率的影响。数值模拟和试验结果吻合良好,能够说明自吸泵内部流动机理。结果显示,相比传统直边叶轮口环结构,采用L型密封口环后的自吸泵容积效率得到明显提高;采用改进的蜗室和储液室匹配,降低了过渡流道的水力损失,有效提高了自吸泵的效率和稳定性。
[Abstract]:In order to improve the problem of low efficiency and high noise of vertical double-stage self-priming pump, an improved vertical double-stage self-priming pump was put forward on the basis of analyzing the structure and internal flow of traditional vertical self-priming pump. The new self-priming pump volute structure and seal ring form are given. The efficiency is improved effectively on the premise of self-priming performance. The internal flow of the traditional vertical two-stage self-priming pump and the improved structure are simulated by using CFD software, and the performance is compared and analyzed. The matching between cochlea chamber and gas-liquid separation chamber and the effect of different sealing ring shape and size on pump efficiency were studied. The numerical simulation is in good agreement with the experimental results, which can explain the internal flow mechanism of the self-priming pump. The results show that the volumetric efficiency of the self-priming pump with L-type seal ring is improved obviously compared with the traditional straight edge impeller ring structure, and the hydraulic loss of the transition passage is reduced by the improved matching between the cochlear chamber and the liquid storage chamber. Effectively improve the efficiency and stability of the self-priming pump.
【作者单位】：浙江大学;杭州川空通用设备有限公司;
【分类号】：TH311

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