Valve dynamics in multi-cylinder positive displacement pump model

Aleksandar Josifovic, J. Corney, J. B. Davies
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引用次数: 5

Abstract

Pumps are critical components of many industrial processes. Although they vary in size, depending on the application, their operating principles and performance parameters are similar across generic families. Large industrial positive displacement (P.D.) pumps, primarily used in mining, oil and gas industries, deliver significant amounts of flow coupled with very high pressures. However, increasing energy costs and sustainability concerns demand systems re-design to improve their efficiency. Most established forms of PD pumps have duty cycles fixed by the movement of spring loaded valves. One approach to increase their energy efficiency could be to dynamically vary the movement of these valves. To test this hypothesis and quantify any potential benefits a computational model is required. This paper introduces modelling technique used to analytically describe a multi-cylinder positive displacement pump. A hybrid modelling approach is described which incorporates analytical relationships, the results of CFD simulation and experimental values. Results show how different valve actuation responses affect the overall flow rate of the pump. The results presented in the paper clearly indicate future development steps for improved control of positive displacement pumps.
多缸容积泵模型中的阀门动力学
泵是许多工业过程的关键部件。尽管它们的大小取决于应用程序,但它们的操作原理和性能参数在通用系列中是相似的。大型工业正排量(pd)泵主要用于采矿、石油和天然气行业,可在非常高的压力下输送大量流量。然而,不断增加的能源成本和可持续性问题要求系统重新设计以提高其效率。大多数已建立形式的PD泵具有由弹簧加载阀的运动固定的占空比。提高其能源效率的一种方法可能是动态改变这些阀门的运动。为了验证这一假设并量化任何潜在的好处,需要一个计算模型。本文介绍了一种多缸容积泵的建模方法。介绍了一种结合分析关系、CFD模拟结果和实验值的混合建模方法。结果显示了不同的阀门驱动响应对泵的总流量的影响。本文的研究结果清楚地指出了改进容积泵控制的未来发展步骤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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