输送介质动力黏度对特种高黏度齿轮泵性能影响分析

doi:10.3901/JME.2025.06.340

摘要/Abstract

摘要： 运用计算流体力学方法，对特种高黏度泵内部流场进行研究。以流场数据为基础，着重研究输送介质动力黏度对泵性能参数的影响。为提高仿真的准确性，针对齿轮泵内部流场特点，修正了湍流RNG κ-ε模型，与空化模型相结合，建立流场分析方程组。根据计算所得泵内压力场与速度场的数据，分析介质黏度对性能参数的影响。介质黏度的升高导致特种泵入口压力降低、出口压力升高，流动的层流特征明显，泵的出口流量脉动情况稳定，脉动幅值随介质黏度的升高而增加；当同时考虑介质黏度与特种齿轮泵齿数两个因素时，可知输送介质黏度处于中黏度段时，特种泵齿数为14时性能较好。按照模拟结论设计加工14齿高黏度泵，用三种不同黏度介质进行试验，结果与数值计算结果吻合较好，研究结果将为高端黏度泵齿轮优化设计奠定理论基础。

关键词: 输送介质, 动力黏度, 特种, 高黏度泵

Abstract: Starting from the foundation, paper studies the internal flow field of special high viscosity pump by using computational fluid dynamics method. Based on the flow field data, the influence of the dynamic viscosity of the conveying medium on the pump performance parameters is emphatically studied. In order to improve the accuracy of the simulation, the turbulent RNG κ-ε is modified according to the characteristics of the internal flow field of the gear pump Model, combined with cavitation model, the flow field analysis equations are established. According to the calculated data of pressure field and velocity field in the pump, the influence of medium viscosity on performance parameters is analyzed. The increase of the medium viscosity leads to the decrease of the inlet pressure and the increase of the outlet pressure of the special pump. The laminar flow characteristics of the flow are obvious. The outlet flow pulsation of the pump is stable, and the pulsation amplitude increases with the increase of the medium viscosity. When the medium viscosity and the number of teeth of the special gear pump are considered at the same time, it can be seen that when the medium viscosity is in the medium viscosity section, the performance of the special pump is better when the number of teeth is 14. According to the simulation results, a 14 tooth high viscosity pump is designed and manufactured, and three different viscosity media are used to test. The results are in good agreement with the numerical results. The results of the paper will lay a theoretical foundation for the optimal design of high-end viscosity pump gears.

Key words: conveying medium, dynamic viscosity, special pump, high viscosity pump

中图分类号:

O373

刘春波, 苑晓晴, 胡加辉, 张旭东. 输送介质动力黏度对特种高黏度齿轮泵性能影响分析[J]. 机械工程学报, 2025, 61(6): 340-348.

LIU Chunbo, YUAN Xiaoqing, HU Jiahui, ZHANG Xudong. Study on the Influence of the Medium Dynamic Viscosity on the Performance of the Special High Viscosity Gear Pump[J]. Journal of Mechanical Engineering, 2025, 61(6): 340-348.

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