水锤泵内部流道优化及性能研究
发布时间：2019-07-17 09:58
【摘要】：水锤泵是一种不用电和油的自动泵水机械,在缺电、无电的山区、农村具有广阔的应用前景。为解决传统设计过程中难以对流道进行评析、研发周期长以及产品性能低的难题,提出了水头损失系数、阀瓣升力系数、阀瓣受力偏心距和出口流速分布均匀度的水锤泵内部流道评价指标和相应的数学模型,建立了采用前扩式和后扩式流道的水锤泵数值模型,并进行了分析对比。前扩式和后扩式流道的水头损失系数分别为4.51和3.72,泄水阀的升力系数分别为4.11和2.23,泄水阀受力来流方向的偏心距分别为0.21 mm和2.02 mm,泄水阀出口的流速分布均匀度分别为47.8%和69.2%。经对比,后扩式流道的水头损失系数和泄水阀升力系数小,受力偏心距大,出口流速分布均匀度高,是一种较为合理的布置形式。选择后扩式流道制造生产了新型水锤泵,在不同作用水头和扬程下进行多工况性能测试,建立了扬水量评估公式,给出了所需的来水量。
[Abstract]:Water hammer pump is a kind of automatic pumping machine without electricity and oil. It has a broad application prospect in the mountainous area where there is no electricity and no electricity. In order to solve the problems of difficult to evaluate the flow passage, long research and development cycle and low product performance in the traditional design process, the evaluation indexes and corresponding mathematical models of the internal flow channel of the water hammer pump with head loss coefficient, disc lift coefficient, disc force eccentricity and uniform outlet velocity distribution are put forward, and the numerical models of the water hammer pump using the front expansion channel and the post expansion channel are established, and the numerical models of the water hammer pump are analyzed and compared. The head loss coefficients of the front expansion channel and the post expansion channel are 4.51 and 3.72, respectively, and the lift coefficients of the discharge valve are 4.11 and 2.23, respectively. the eccentricity of the discharge valve is 0.21 mm and 2.02 mm, respectively. The uniformity of velocity distribution at the outlet of the drain valve is 47.8% and 69.2%, respectively. By comparison, the head loss coefficient and the lift coefficient of the discharge valve are small, the eccentricity of the force is large, and the uniformity of the velocity distribution at the outlet is high, so it is a more reasonable arrangement form. A new type of water hammer pump is manufactured by selecting the expanded runner. The performance of the pump is tested under different operating conditions, the evaluation formula of lifting water is established, and the required amount of water is given.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;清华大学水利水电工程系;河北工程大学水利水电学院;
【基金】：国家重点研发计划课题(2016YFC0401808) 国家自然科学基金项目(51609265) 国家十二五科技支撑计划(2015BAD24B02) 中国水科院科研专项(HY01458B802017)
【分类号】：TV136.2
本文编号：2515415
[Abstract]:Water hammer pump is a kind of automatic pumping machine without electricity and oil. It has a broad application prospect in the mountainous area where there is no electricity and no electricity. In order to solve the problems of difficult to evaluate the flow passage, long research and development cycle and low product performance in the traditional design process, the evaluation indexes and corresponding mathematical models of the internal flow channel of the water hammer pump with head loss coefficient, disc lift coefficient, disc force eccentricity and uniform outlet velocity distribution are put forward, and the numerical models of the water hammer pump using the front expansion channel and the post expansion channel are established, and the numerical models of the water hammer pump are analyzed and compared. The head loss coefficients of the front expansion channel and the post expansion channel are 4.51 and 3.72, respectively, and the lift coefficients of the discharge valve are 4.11 and 2.23, respectively. the eccentricity of the discharge valve is 0.21 mm and 2.02 mm, respectively. The uniformity of velocity distribution at the outlet of the drain valve is 47.8% and 69.2%, respectively. By comparison, the head loss coefficient and the lift coefficient of the discharge valve are small, the eccentricity of the force is large, and the uniformity of the velocity distribution at the outlet is high, so it is a more reasonable arrangement form. A new type of water hammer pump is manufactured by selecting the expanded runner. The performance of the pump is tested under different operating conditions, the evaluation formula of lifting water is established, and the required amount of water is given.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;清华大学水利水电工程系;河北工程大学水利水电学院;
【基金】：国家重点研发计划课题(2016YFC0401808) 国家自然科学基金项目(51609265) 国家十二五科技支撑计划(2015BAD24B02) 中国水科院科研专项(HY01458B802017)
【分类号】：TV136.2
【相似文献】
相关硕士学位论文 前1条
1 许志刚;停泵水锤数值模拟及其可视化技术的研究[D];湖南大学;2009年
，本文编号：2515415
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2515415.html
