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Fluid characteristic of multiphase fluid in annular space between pump barrel and plunger

抽油泵柱塞与泵筒环形空间内的多相流体特性

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Abstract

The pump performance parameters, such as pump pressure, plunger friction and pump valve resistance, are fundamental parameters of optimal design of pump efficiency and sucker rod pumping system (SRPS). In this paper, considering the characteristic of geometrical nonlinear and rheology property of multiphase fluid, the pump performance parameters are studied. Firstly, a dynamics model of annular fluid flow is built. In the detail, a partial differential equation of annular fluid is established and a computing model of fluid pressure gradient is built. Secondly, the simulation models of plunger friction and hydraulic resistance of pump valve are built. Finally, a novel simulation method of fluid pressure in annular space is proposed with software ANSYS. In order to check up the correction of models proposed in this paper, the comparison curves of experiment and simulation results are given. Based on above model, the whole simulation model of plunger pump is simulated with Visual Basic 6.0. The results show that the fluid friction of pump plunger and instantaneous resistance of pump valve are nonlinear. The impact factors of pump performance parameters are analyzed, and their characteristic curves are given, which can help to optimize the pump motion parameters and pump structural.

摘要

进行抽油泵性能参数分析是泵效和有杆抽油系统优化设计的基础。为此, 本文考虑抽油泵结构 几何非线性和多相流体的流变特性, 进行了抽油泵性能参数的仿真研究。首先, 进行了环空流体动力 学分析, 建立了描述环空流体流动规律的动力学模型和流体压力梯度的计算模型。其次, 对柱塞摩擦 力和泵阀隙水力损失进行了分析, 建立了柱塞摩擦力和泵阀隙水力损失的仿真模型。最后, 基于有限 元分析软件, 提出了环空流体压力的仿真方法。基于实验和仿真数据, 进行了仿真模型精度的对比验 证。应用 VB 6.0 软件, 编制了整体系统的数值仿真算法, 并进行了动态参数仿真。仿真结果表明: 柱塞摩擦力和泵阀隙水力损失的变化规律具有显著的非线性特征。与此同时, 进行了抽油泵性能参数 影响因素分析并给出了相应特性曲线。研究结果对抽油泵性能参数优化和抽油泵整体结构的合理设计 具有要的实际意义。

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Authors and Affiliations

  1. School of Mechanical & Vehicle Engineering, Linyi University, Linyi, 276000, China

    Ming-ming Xing  (邢明明), Yan Zhao  (赵妍), Kai-feng Xue  (薛凯峰) & Cheng-mao Zhang  (张成茂)

  2. Municipal Modern Agriculture UAV Engineering and Technological Research Centers, Linyi, 276000, China

    Ming-ming Xing  (邢明明), Li-li Zhou  (周丽丽), Yan Zhao  (赵妍), Kai-feng Xue  (薛凯峰) & Cheng-mao Zhang  (张成茂)

  3. School of Chemistry & Chemical Engineering, Linyi University, Linyi, 276000, China

    Li-li Zhou  (周丽丽)

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  1. Ming-ming Xing  (邢明明)
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Correspondence to Ming-ming Xing  (邢明明).

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Xing, Mm., Zhou, Ll., Zhao, Y. et al. Fluid characteristic of multiphase fluid in annular space between pump barrel and plunger. J. Cent. South Univ. 26, 1327–1341 (2019). https://doi.org/10.1007/s11771-019-4090-y

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