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。
In order to solve the problems of low efficiency and high noise level of a vertical double-stage self-priming pump, the new volute chamber and annular sealing of impeller are presented on basis of the traditional self-priming pump under the premise of ensuring the self-priming performance. The internal flow field of the tradition self-priming pump and a novel structure were numerically simulated using the CFD tool, the internal flow structure and performance were analyzed. The matching structures between the volute and the liquid storage chamber were optimized, and the pump performance under annular sealing with different shapes and sizes was also analyzed. The numerical simulation results are in good agreement with the experimental results, the results show that the L type annular sealing, compared to the traditional annular sealing structure, improved the volume efficiency of the self-priming pump obviously; New volute chamber and liquid storage chamber are better matched to reduce the hydraulic loss and improve efficiency and stability of the double-stage self-priming pump.
出处
《流体机械》
CSCD
北大核心
2017年第9期33-39,共7页
Fluid Machinery
关键词
自吸泵
立式双级泵
密封口环
容积效率
数值模拟
self -priming pump
vertical double-stage pump
annular sealing
volume efficiency
numerical simulation.
